]>
Commit | Line | Data |
---|---|---|
5fd54ace | 1 | // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
7359d482 PZ |
2 | /* |
3 | * hcd.c - DesignWare HS OTG Controller host-mode routines | |
4 | * | |
5 | * Copyright (C) 2004-2013 Synopsys, Inc. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions, and the following disclaimer, | |
12 | * without modification. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. The names of the above-listed copyright holders may not be used | |
17 | * to endorse or promote products derived from this software without | |
18 | * specific prior written permission. | |
19 | * | |
20 | * ALTERNATIVELY, this software may be distributed under the terms of the | |
21 | * GNU General Public License ("GPL") as published by the Free Software | |
22 | * Foundation; either version 2 of the License, or (at your option) any | |
23 | * later version. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
26 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
27 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
29 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
30 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
31 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
32 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | /* | |
39 | * This file contains the core HCD code, and implements the Linux hc_driver | |
40 | * API | |
41 | */ | |
42 | #include <linux/kernel.h> | |
43 | #include <linux/module.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/interrupt.h> | |
348becdc | 46 | #include <linux/platform_device.h> |
7359d482 PZ |
47 | #include <linux/dma-mapping.h> |
48 | #include <linux/delay.h> | |
49 | #include <linux/io.h> | |
50 | #include <linux/slab.h> | |
51 | #include <linux/usb.h> | |
52 | ||
53 | #include <linux/usb/hcd.h> | |
54 | #include <linux/usb/ch11.h> | |
55 | ||
56 | #include "core.h" | |
57 | #include "hcd.h" | |
58 | ||
9156a7ef CY |
59 | static void dwc2_port_resume(struct dwc2_hsotg *hsotg); |
60 | ||
b02038fa JY |
61 | /* |
62 | * ========================================================================= | |
63 | * Host Core Layer Functions | |
64 | * ========================================================================= | |
65 | */ | |
66 | ||
67 | /** | |
68 | * dwc2_enable_common_interrupts() - Initializes the commmon interrupts, | |
69 | * used in both device and host modes | |
70 | * | |
71 | * @hsotg: Programming view of the DWC_otg controller | |
72 | */ | |
73 | static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg) | |
74 | { | |
75 | u32 intmsk; | |
76 | ||
77 | /* Clear any pending OTG Interrupts */ | |
78 | dwc2_writel(0xffffffff, hsotg->regs + GOTGINT); | |
79 | ||
80 | /* Clear any pending interrupts */ | |
81 | dwc2_writel(0xffffffff, hsotg->regs + GINTSTS); | |
82 | ||
83 | /* Enable the interrupts in the GINTMSK */ | |
84 | intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT; | |
85 | ||
95832c00 | 86 | if (!hsotg->params.host_dma) |
b02038fa | 87 | intmsk |= GINTSTS_RXFLVL; |
95832c00 | 88 | if (!hsotg->params.external_id_pin_ctl) |
b02038fa JY |
89 | intmsk |= GINTSTS_CONIDSTSCHNG; |
90 | ||
91 | intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP | | |
92 | GINTSTS_SESSREQINT; | |
93 | ||
94 | dwc2_writel(intmsk, hsotg->regs + GINTMSK); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Initializes the FSLSPClkSel field of the HCFG register depending on the | |
99 | * PHY type | |
100 | */ | |
101 | static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg) | |
102 | { | |
103 | u32 hcfg, val; | |
104 | ||
105 | if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI && | |
106 | hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED && | |
95832c00 | 107 | hsotg->params.ulpi_fs_ls) || |
bea8e86c | 108 | hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) { |
b02038fa JY |
109 | /* Full speed PHY */ |
110 | val = HCFG_FSLSPCLKSEL_48_MHZ; | |
111 | } else { | |
112 | /* High speed PHY running at full speed or high speed */ | |
113 | val = HCFG_FSLSPCLKSEL_30_60_MHZ; | |
114 | } | |
115 | ||
116 | dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val); | |
117 | hcfg = dwc2_readl(hsotg->regs + HCFG); | |
118 | hcfg &= ~HCFG_FSLSPCLKSEL_MASK; | |
119 | hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT; | |
120 | dwc2_writel(hcfg, hsotg->regs + HCFG); | |
121 | } | |
122 | ||
123 | static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) | |
124 | { | |
e35b1350 | 125 | u32 usbcfg, ggpio, i2cctl; |
b02038fa JY |
126 | int retval = 0; |
127 | ||
128 | /* | |
129 | * core_init() is now called on every switch so only call the | |
130 | * following for the first time through | |
131 | */ | |
132 | if (select_phy) { | |
133 | dev_dbg(hsotg->dev, "FS PHY selected\n"); | |
134 | ||
135 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
136 | if (!(usbcfg & GUSBCFG_PHYSEL)) { | |
137 | usbcfg |= GUSBCFG_PHYSEL; | |
138 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
139 | ||
140 | /* Reset after a PHY select */ | |
141 | retval = dwc2_core_reset_and_force_dr_mode(hsotg); | |
142 | ||
143 | if (retval) { | |
144 | dev_err(hsotg->dev, | |
145 | "%s: Reset failed, aborting", __func__); | |
146 | return retval; | |
147 | } | |
148 | } | |
e35b1350 BH |
149 | |
150 | if (hsotg->params.activate_stm_fs_transceiver) { | |
151 | ggpio = dwc2_readl(hsotg->regs + GGPIO); | |
152 | if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) { | |
153 | dev_dbg(hsotg->dev, "Activating transceiver\n"); | |
154 | /* | |
155 | * STM32F4x9 uses the GGPIO register as general | |
156 | * core configuration register. | |
157 | */ | |
158 | ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN; | |
159 | dwc2_writel(ggpio, hsotg->regs + GGPIO); | |
160 | } | |
161 | } | |
b02038fa JY |
162 | } |
163 | ||
164 | /* | |
165 | * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also | |
166 | * do this on HNP Dev/Host mode switches (done in dev_init and | |
167 | * host_init). | |
168 | */ | |
169 | if (dwc2_is_host_mode(hsotg)) | |
170 | dwc2_init_fs_ls_pclk_sel(hsotg); | |
171 | ||
95832c00 | 172 | if (hsotg->params.i2c_enable) { |
b02038fa JY |
173 | dev_dbg(hsotg->dev, "FS PHY enabling I2C\n"); |
174 | ||
175 | /* Program GUSBCFG.OtgUtmiFsSel to I2C */ | |
176 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
177 | usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL; | |
178 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
179 | ||
180 | /* Program GI2CCTL.I2CEn */ | |
181 | i2cctl = dwc2_readl(hsotg->regs + GI2CCTL); | |
182 | i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK; | |
183 | i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT; | |
184 | i2cctl &= ~GI2CCTL_I2CEN; | |
185 | dwc2_writel(i2cctl, hsotg->regs + GI2CCTL); | |
186 | i2cctl |= GI2CCTL_I2CEN; | |
187 | dwc2_writel(i2cctl, hsotg->regs + GI2CCTL); | |
188 | } | |
189 | ||
190 | return retval; | |
191 | } | |
192 | ||
193 | static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) | |
194 | { | |
195 | u32 usbcfg, usbcfg_old; | |
196 | int retval = 0; | |
197 | ||
198 | if (!select_phy) | |
199 | return 0; | |
200 | ||
201 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
202 | usbcfg_old = usbcfg; | |
203 | ||
204 | /* | |
205 | * HS PHY parameters. These parameters are preserved during soft reset | |
206 | * so only program the first time. Do a soft reset immediately after | |
207 | * setting phyif. | |
208 | */ | |
bea8e86c | 209 | switch (hsotg->params.phy_type) { |
b02038fa JY |
210 | case DWC2_PHY_TYPE_PARAM_ULPI: |
211 | /* ULPI interface */ | |
212 | dev_dbg(hsotg->dev, "HS ULPI PHY selected\n"); | |
213 | usbcfg |= GUSBCFG_ULPI_UTMI_SEL; | |
214 | usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL); | |
95832c00 | 215 | if (hsotg->params.phy_ulpi_ddr) |
b02038fa | 216 | usbcfg |= GUSBCFG_DDRSEL; |
b11633c4 DN |
217 | |
218 | /* Set external VBUS indicator as needed. */ | |
219 | if (hsotg->params.oc_disable) | |
220 | usbcfg |= (GUSBCFG_ULPI_INT_VBUS_IND | | |
221 | GUSBCFG_INDICATORPASSTHROUGH); | |
b02038fa JY |
222 | break; |
223 | case DWC2_PHY_TYPE_PARAM_UTMI: | |
224 | /* UTMI+ interface */ | |
225 | dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n"); | |
226 | usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16); | |
bea8e86c | 227 | if (hsotg->params.phy_utmi_width == 16) |
b02038fa JY |
228 | usbcfg |= GUSBCFG_PHYIF16; |
229 | break; | |
230 | default: | |
231 | dev_err(hsotg->dev, "FS PHY selected at HS!\n"); | |
232 | break; | |
233 | } | |
234 | ||
235 | if (usbcfg != usbcfg_old) { | |
236 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
237 | ||
238 | /* Reset after setting the PHY parameters */ | |
239 | retval = dwc2_core_reset_and_force_dr_mode(hsotg); | |
240 | if (retval) { | |
241 | dev_err(hsotg->dev, | |
242 | "%s: Reset failed, aborting", __func__); | |
243 | return retval; | |
244 | } | |
245 | } | |
246 | ||
247 | return retval; | |
248 | } | |
249 | ||
250 | static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) | |
251 | { | |
252 | u32 usbcfg; | |
253 | int retval = 0; | |
254 | ||
38e9002b VM |
255 | if ((hsotg->params.speed == DWC2_SPEED_PARAM_FULL || |
256 | hsotg->params.speed == DWC2_SPEED_PARAM_LOW) && | |
bea8e86c | 257 | hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) { |
38e9002b | 258 | /* If FS/LS mode with FS/LS PHY */ |
b02038fa JY |
259 | retval = dwc2_fs_phy_init(hsotg, select_phy); |
260 | if (retval) | |
261 | return retval; | |
262 | } else { | |
263 | /* High speed PHY */ | |
264 | retval = dwc2_hs_phy_init(hsotg, select_phy); | |
265 | if (retval) | |
266 | return retval; | |
267 | } | |
268 | ||
269 | if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI && | |
270 | hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED && | |
95832c00 | 271 | hsotg->params.ulpi_fs_ls) { |
b02038fa JY |
272 | dev_dbg(hsotg->dev, "Setting ULPI FSLS\n"); |
273 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
274 | usbcfg |= GUSBCFG_ULPI_FS_LS; | |
275 | usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M; | |
276 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
277 | } else { | |
278 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
279 | usbcfg &= ~GUSBCFG_ULPI_FS_LS; | |
280 | usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M; | |
281 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
282 | } | |
283 | ||
284 | return retval; | |
285 | } | |
286 | ||
287 | static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg) | |
288 | { | |
289 | u32 ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG); | |
290 | ||
291 | switch (hsotg->hw_params.arch) { | |
292 | case GHWCFG2_EXT_DMA_ARCH: | |
293 | dev_err(hsotg->dev, "External DMA Mode not supported\n"); | |
294 | return -EINVAL; | |
295 | ||
296 | case GHWCFG2_INT_DMA_ARCH: | |
297 | dev_dbg(hsotg->dev, "Internal DMA Mode\n"); | |
bea8e86c | 298 | if (hsotg->params.ahbcfg != -1) { |
b02038fa | 299 | ahbcfg &= GAHBCFG_CTRL_MASK; |
bea8e86c | 300 | ahbcfg |= hsotg->params.ahbcfg & |
b02038fa JY |
301 | ~GAHBCFG_CTRL_MASK; |
302 | } | |
303 | break; | |
304 | ||
305 | case GHWCFG2_SLAVE_ONLY_ARCH: | |
306 | default: | |
307 | dev_dbg(hsotg->dev, "Slave Only Mode\n"); | |
308 | break; | |
309 | } | |
310 | ||
e7839f99 JY |
311 | dev_dbg(hsotg->dev, "host_dma:%d dma_desc_enable:%d\n", |
312 | hsotg->params.host_dma, | |
bea8e86c | 313 | hsotg->params.dma_desc_enable); |
b02038fa | 314 | |
95832c00 JY |
315 | if (hsotg->params.host_dma) { |
316 | if (hsotg->params.dma_desc_enable) | |
b02038fa JY |
317 | dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n"); |
318 | else | |
319 | dev_dbg(hsotg->dev, "Using Buffer DMA mode\n"); | |
320 | } else { | |
321 | dev_dbg(hsotg->dev, "Using Slave mode\n"); | |
95832c00 | 322 | hsotg->params.dma_desc_enable = false; |
b02038fa JY |
323 | } |
324 | ||
95832c00 | 325 | if (hsotg->params.host_dma) |
b02038fa JY |
326 | ahbcfg |= GAHBCFG_DMA_EN; |
327 | ||
328 | dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg) | |
334 | { | |
335 | u32 usbcfg; | |
336 | ||
337 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
338 | usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP); | |
339 | ||
340 | switch (hsotg->hw_params.op_mode) { | |
341 | case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE: | |
bea8e86c | 342 | if (hsotg->params.otg_cap == |
b02038fa JY |
343 | DWC2_CAP_PARAM_HNP_SRP_CAPABLE) |
344 | usbcfg |= GUSBCFG_HNPCAP; | |
bea8e86c | 345 | if (hsotg->params.otg_cap != |
b02038fa JY |
346 | DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE) |
347 | usbcfg |= GUSBCFG_SRPCAP; | |
348 | break; | |
349 | ||
350 | case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE: | |
351 | case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE: | |
352 | case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST: | |
bea8e86c | 353 | if (hsotg->params.otg_cap != |
b02038fa JY |
354 | DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE) |
355 | usbcfg |= GUSBCFG_SRPCAP; | |
356 | break; | |
357 | ||
358 | case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE: | |
359 | case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE: | |
360 | case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST: | |
361 | default: | |
362 | break; | |
363 | } | |
364 | ||
365 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
366 | } | |
367 | ||
368 | /** | |
369 | * dwc2_enable_host_interrupts() - Enables the Host mode interrupts | |
370 | * | |
371 | * @hsotg: Programming view of DWC_otg controller | |
372 | */ | |
373 | static void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg) | |
374 | { | |
375 | u32 intmsk; | |
376 | ||
377 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
378 | ||
379 | /* Disable all interrupts */ | |
380 | dwc2_writel(0, hsotg->regs + GINTMSK); | |
381 | dwc2_writel(0, hsotg->regs + HAINTMSK); | |
382 | ||
383 | /* Enable the common interrupts */ | |
384 | dwc2_enable_common_interrupts(hsotg); | |
385 | ||
386 | /* Enable host mode interrupts without disturbing common interrupts */ | |
387 | intmsk = dwc2_readl(hsotg->regs + GINTMSK); | |
388 | intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT; | |
389 | dwc2_writel(intmsk, hsotg->regs + GINTMSK); | |
390 | } | |
391 | ||
392 | /** | |
393 | * dwc2_disable_host_interrupts() - Disables the Host Mode interrupts | |
394 | * | |
395 | * @hsotg: Programming view of DWC_otg controller | |
396 | */ | |
397 | static void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg) | |
398 | { | |
399 | u32 intmsk = dwc2_readl(hsotg->regs + GINTMSK); | |
400 | ||
401 | /* Disable host mode interrupts without disturbing common interrupts */ | |
402 | intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT | | |
403 | GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP | GINTSTS_DISCONNINT); | |
404 | dwc2_writel(intmsk, hsotg->regs + GINTMSK); | |
405 | } | |
406 | ||
407 | /* | |
408 | * dwc2_calculate_dynamic_fifo() - Calculates the default fifo size | |
409 | * For system that have a total fifo depth that is smaller than the default | |
410 | * RX + TX fifo size. | |
411 | * | |
412 | * @hsotg: Programming view of DWC_otg controller | |
413 | */ | |
414 | static void dwc2_calculate_dynamic_fifo(struct dwc2_hsotg *hsotg) | |
415 | { | |
bea8e86c | 416 | struct dwc2_core_params *params = &hsotg->params; |
b02038fa JY |
417 | struct dwc2_hw_params *hw = &hsotg->hw_params; |
418 | u32 rxfsiz, nptxfsiz, ptxfsiz, total_fifo_size; | |
419 | ||
420 | total_fifo_size = hw->total_fifo_size; | |
421 | rxfsiz = params->host_rx_fifo_size; | |
422 | nptxfsiz = params->host_nperio_tx_fifo_size; | |
423 | ptxfsiz = params->host_perio_tx_fifo_size; | |
424 | ||
425 | /* | |
426 | * Will use Method 2 defined in the DWC2 spec: minimum FIFO depth | |
427 | * allocation with support for high bandwidth endpoints. Synopsys | |
428 | * defines MPS(Max Packet size) for a periodic EP=1024, and for | |
429 | * non-periodic as 512. | |
430 | */ | |
431 | if (total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)) { | |
432 | /* | |
433 | * For Buffer DMA mode/Scatter Gather DMA mode | |
434 | * 2 * ((Largest Packet size / 4) + 1 + 1) + n | |
435 | * with n = number of host channel. | |
436 | * 2 * ((1024/4) + 2) = 516 | |
437 | */ | |
438 | rxfsiz = 516 + hw->host_channels; | |
439 | ||
440 | /* | |
441 | * min non-periodic tx fifo depth | |
442 | * 2 * (largest non-periodic USB packet used / 4) | |
443 | * 2 * (512/4) = 256 | |
444 | */ | |
445 | nptxfsiz = 256; | |
446 | ||
447 | /* | |
448 | * min periodic tx fifo depth | |
449 | * (largest packet size*MC)/4 | |
450 | * (1024 * 3)/4 = 768 | |
451 | */ | |
452 | ptxfsiz = 768; | |
453 | ||
454 | params->host_rx_fifo_size = rxfsiz; | |
455 | params->host_nperio_tx_fifo_size = nptxfsiz; | |
456 | params->host_perio_tx_fifo_size = ptxfsiz; | |
457 | } | |
458 | ||
459 | /* | |
460 | * If the summation of RX, NPTX and PTX fifo sizes is still | |
461 | * bigger than the total_fifo_size, then we have a problem. | |
462 | * | |
463 | * We won't be able to allocate as many endpoints. Right now, | |
464 | * we're just printing an error message, but ideally this FIFO | |
465 | * allocation algorithm would be improved in the future. | |
466 | * | |
467 | * FIXME improve this FIFO allocation algorithm. | |
468 | */ | |
469 | if (unlikely(total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz))) | |
470 | dev_err(hsotg->dev, "invalid fifo sizes\n"); | |
471 | } | |
472 | ||
473 | static void dwc2_config_fifos(struct dwc2_hsotg *hsotg) | |
474 | { | |
bea8e86c | 475 | struct dwc2_core_params *params = &hsotg->params; |
b02038fa JY |
476 | u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz; |
477 | ||
478 | if (!params->enable_dynamic_fifo) | |
479 | return; | |
480 | ||
481 | dwc2_calculate_dynamic_fifo(hsotg); | |
482 | ||
483 | /* Rx FIFO */ | |
484 | grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ); | |
485 | dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz); | |
486 | grxfsiz &= ~GRXFSIZ_DEPTH_MASK; | |
487 | grxfsiz |= params->host_rx_fifo_size << | |
488 | GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK; | |
489 | dwc2_writel(grxfsiz, hsotg->regs + GRXFSIZ); | |
490 | dev_dbg(hsotg->dev, "new grxfsiz=%08x\n", | |
491 | dwc2_readl(hsotg->regs + GRXFSIZ)); | |
492 | ||
493 | /* Non-periodic Tx FIFO */ | |
494 | dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n", | |
495 | dwc2_readl(hsotg->regs + GNPTXFSIZ)); | |
496 | nptxfsiz = params->host_nperio_tx_fifo_size << | |
497 | FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK; | |
498 | nptxfsiz |= params->host_rx_fifo_size << | |
499 | FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK; | |
500 | dwc2_writel(nptxfsiz, hsotg->regs + GNPTXFSIZ); | |
501 | dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n", | |
502 | dwc2_readl(hsotg->regs + GNPTXFSIZ)); | |
503 | ||
504 | /* Periodic Tx FIFO */ | |
505 | dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n", | |
506 | dwc2_readl(hsotg->regs + HPTXFSIZ)); | |
507 | hptxfsiz = params->host_perio_tx_fifo_size << | |
508 | FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK; | |
509 | hptxfsiz |= (params->host_rx_fifo_size + | |
510 | params->host_nperio_tx_fifo_size) << | |
511 | FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK; | |
512 | dwc2_writel(hptxfsiz, hsotg->regs + HPTXFSIZ); | |
513 | dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n", | |
514 | dwc2_readl(hsotg->regs + HPTXFSIZ)); | |
515 | ||
95832c00 | 516 | if (hsotg->params.en_multiple_tx_fifo && |
e1f411d1 | 517 | hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_91a) { |
b02038fa | 518 | /* |
e1f411d1 | 519 | * This feature was implemented in 2.91a version |
b02038fa JY |
520 | * Global DFIFOCFG calculation for Host mode - |
521 | * include RxFIFO, NPTXFIFO and HPTXFIFO | |
522 | */ | |
523 | dfifocfg = dwc2_readl(hsotg->regs + GDFIFOCFG); | |
524 | dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK; | |
525 | dfifocfg |= (params->host_rx_fifo_size + | |
526 | params->host_nperio_tx_fifo_size + | |
527 | params->host_perio_tx_fifo_size) << | |
528 | GDFIFOCFG_EPINFOBASE_SHIFT & | |
529 | GDFIFOCFG_EPINFOBASE_MASK; | |
530 | dwc2_writel(dfifocfg, hsotg->regs + GDFIFOCFG); | |
531 | } | |
532 | } | |
533 | ||
534 | /** | |
535 | * dwc2_calc_frame_interval() - Calculates the correct frame Interval value for | |
536 | * the HFIR register according to PHY type and speed | |
537 | * | |
538 | * @hsotg: Programming view of DWC_otg controller | |
539 | * | |
540 | * NOTE: The caller can modify the value of the HFIR register only after the | |
541 | * Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort) | |
542 | * has been set | |
543 | */ | |
544 | u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg) | |
545 | { | |
546 | u32 usbcfg; | |
547 | u32 hprt0; | |
548 | int clock = 60; /* default value */ | |
549 | ||
550 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
551 | hprt0 = dwc2_readl(hsotg->regs + HPRT0); | |
552 | ||
553 | if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) && | |
554 | !(usbcfg & GUSBCFG_PHYIF16)) | |
555 | clock = 60; | |
556 | if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type == | |
557 | GHWCFG2_FS_PHY_TYPE_SHARED_ULPI) | |
558 | clock = 48; | |
559 | if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && | |
560 | !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16)) | |
561 | clock = 30; | |
562 | if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && | |
563 | !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16)) | |
564 | clock = 60; | |
565 | if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && | |
566 | !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16)) | |
567 | clock = 48; | |
568 | if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) && | |
569 | hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI) | |
570 | clock = 48; | |
571 | if ((usbcfg & GUSBCFG_PHYSEL) && | |
572 | hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) | |
573 | clock = 48; | |
574 | ||
575 | if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED) | |
576 | /* High speed case */ | |
577 | return 125 * clock - 1; | |
578 | ||
579 | /* FS/LS case */ | |
580 | return 1000 * clock - 1; | |
581 | } | |
582 | ||
583 | /** | |
584 | * dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination | |
585 | * buffer | |
586 | * | |
587 | * @core_if: Programming view of DWC_otg controller | |
588 | * @dest: Destination buffer for the packet | |
589 | * @bytes: Number of bytes to copy to the destination | |
590 | */ | |
591 | void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes) | |
592 | { | |
593 | u32 __iomem *fifo = hsotg->regs + HCFIFO(0); | |
594 | u32 *data_buf = (u32 *)dest; | |
595 | int word_count = (bytes + 3) / 4; | |
596 | int i; | |
597 | ||
598 | /* | |
599 | * Todo: Account for the case where dest is not dword aligned. This | |
600 | * requires reading data from the FIFO into a u32 temp buffer, then | |
601 | * moving it into the data buffer. | |
602 | */ | |
603 | ||
604 | dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes); | |
605 | ||
606 | for (i = 0; i < word_count; i++, data_buf++) | |
607 | *data_buf = dwc2_readl(fifo); | |
608 | } | |
609 | ||
610 | /** | |
611 | * dwc2_dump_channel_info() - Prints the state of a host channel | |
612 | * | |
613 | * @hsotg: Programming view of DWC_otg controller | |
614 | * @chan: Pointer to the channel to dump | |
615 | * | |
616 | * Must be called with interrupt disabled and spinlock held | |
617 | * | |
618 | * NOTE: This function will be removed once the peripheral controller code | |
619 | * is integrated and the driver is stable | |
620 | */ | |
621 | static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg, | |
622 | struct dwc2_host_chan *chan) | |
623 | { | |
624 | #ifdef VERBOSE_DEBUG | |
bea8e86c | 625 | int num_channels = hsotg->params.host_channels; |
b02038fa JY |
626 | struct dwc2_qh *qh; |
627 | u32 hcchar; | |
628 | u32 hcsplt; | |
629 | u32 hctsiz; | |
630 | u32 hc_dma; | |
631 | int i; | |
632 | ||
633 | if (!chan) | |
634 | return; | |
635 | ||
636 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
637 | hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num)); | |
638 | hctsiz = dwc2_readl(hsotg->regs + HCTSIZ(chan->hc_num)); | |
639 | hc_dma = dwc2_readl(hsotg->regs + HCDMA(chan->hc_num)); | |
640 | ||
641 | dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan); | |
642 | dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", | |
643 | hcchar, hcsplt); | |
644 | dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", | |
645 | hctsiz, hc_dma); | |
646 | dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", | |
647 | chan->dev_addr, chan->ep_num, chan->ep_is_in); | |
648 | dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); | |
649 | dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); | |
650 | dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start); | |
651 | dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started); | |
652 | dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); | |
653 | dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); | |
654 | dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", | |
655 | (unsigned long)chan->xfer_dma); | |
656 | dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); | |
657 | dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); | |
658 | dev_dbg(hsotg->dev, " NP inactive sched:\n"); | |
659 | list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive, | |
660 | qh_list_entry) | |
661 | dev_dbg(hsotg->dev, " %p\n", qh); | |
662 | dev_dbg(hsotg->dev, " NP active sched:\n"); | |
663 | list_for_each_entry(qh, &hsotg->non_periodic_sched_active, | |
664 | qh_list_entry) | |
665 | dev_dbg(hsotg->dev, " %p\n", qh); | |
666 | dev_dbg(hsotg->dev, " Channels:\n"); | |
667 | for (i = 0; i < num_channels; i++) { | |
668 | struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; | |
669 | ||
670 | dev_dbg(hsotg->dev, " %2d: %p\n", i, chan); | |
671 | } | |
672 | #endif /* VERBOSE_DEBUG */ | |
673 | } | |
674 | ||
4411beba RK |
675 | static int _dwc2_hcd_start(struct usb_hcd *hcd); |
676 | ||
677 | static void dwc2_host_start(struct dwc2_hsotg *hsotg) | |
678 | { | |
679 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
680 | ||
681 | hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg); | |
682 | _dwc2_hcd_start(hcd); | |
683 | } | |
684 | ||
685 | static void dwc2_host_disconnect(struct dwc2_hsotg *hsotg) | |
686 | { | |
687 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
688 | ||
689 | hcd->self.is_b_host = 0; | |
690 | } | |
691 | ||
692 | static void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, | |
693 | int *hub_addr, int *hub_port) | |
694 | { | |
695 | struct urb *urb = context; | |
696 | ||
697 | if (urb->dev->tt) | |
698 | *hub_addr = urb->dev->tt->hub->devnum; | |
699 | else | |
700 | *hub_addr = 0; | |
701 | *hub_port = urb->dev->ttport; | |
702 | } | |
703 | ||
b02038fa JY |
704 | /* |
705 | * ========================================================================= | |
706 | * Low Level Host Channel Access Functions | |
707 | * ========================================================================= | |
708 | */ | |
709 | ||
710 | static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg, | |
711 | struct dwc2_host_chan *chan) | |
712 | { | |
713 | u32 hcintmsk = HCINTMSK_CHHLTD; | |
714 | ||
715 | switch (chan->ep_type) { | |
716 | case USB_ENDPOINT_XFER_CONTROL: | |
717 | case USB_ENDPOINT_XFER_BULK: | |
718 | dev_vdbg(hsotg->dev, "control/bulk\n"); | |
719 | hcintmsk |= HCINTMSK_XFERCOMPL; | |
720 | hcintmsk |= HCINTMSK_STALL; | |
721 | hcintmsk |= HCINTMSK_XACTERR; | |
722 | hcintmsk |= HCINTMSK_DATATGLERR; | |
723 | if (chan->ep_is_in) { | |
724 | hcintmsk |= HCINTMSK_BBLERR; | |
725 | } else { | |
726 | hcintmsk |= HCINTMSK_NAK; | |
727 | hcintmsk |= HCINTMSK_NYET; | |
728 | if (chan->do_ping) | |
729 | hcintmsk |= HCINTMSK_ACK; | |
730 | } | |
731 | ||
732 | if (chan->do_split) { | |
733 | hcintmsk |= HCINTMSK_NAK; | |
734 | if (chan->complete_split) | |
735 | hcintmsk |= HCINTMSK_NYET; | |
736 | else | |
737 | hcintmsk |= HCINTMSK_ACK; | |
738 | } | |
739 | ||
740 | if (chan->error_state) | |
741 | hcintmsk |= HCINTMSK_ACK; | |
742 | break; | |
743 | ||
744 | case USB_ENDPOINT_XFER_INT: | |
745 | if (dbg_perio()) | |
746 | dev_vdbg(hsotg->dev, "intr\n"); | |
747 | hcintmsk |= HCINTMSK_XFERCOMPL; | |
748 | hcintmsk |= HCINTMSK_NAK; | |
749 | hcintmsk |= HCINTMSK_STALL; | |
750 | hcintmsk |= HCINTMSK_XACTERR; | |
751 | hcintmsk |= HCINTMSK_DATATGLERR; | |
752 | hcintmsk |= HCINTMSK_FRMOVRUN; | |
753 | ||
754 | if (chan->ep_is_in) | |
755 | hcintmsk |= HCINTMSK_BBLERR; | |
756 | if (chan->error_state) | |
757 | hcintmsk |= HCINTMSK_ACK; | |
758 | if (chan->do_split) { | |
759 | if (chan->complete_split) | |
760 | hcintmsk |= HCINTMSK_NYET; | |
761 | else | |
762 | hcintmsk |= HCINTMSK_ACK; | |
763 | } | |
764 | break; | |
765 | ||
766 | case USB_ENDPOINT_XFER_ISOC: | |
767 | if (dbg_perio()) | |
768 | dev_vdbg(hsotg->dev, "isoc\n"); | |
769 | hcintmsk |= HCINTMSK_XFERCOMPL; | |
770 | hcintmsk |= HCINTMSK_FRMOVRUN; | |
771 | hcintmsk |= HCINTMSK_ACK; | |
772 | ||
773 | if (chan->ep_is_in) { | |
774 | hcintmsk |= HCINTMSK_XACTERR; | |
775 | hcintmsk |= HCINTMSK_BBLERR; | |
776 | } | |
777 | break; | |
778 | default: | |
779 | dev_err(hsotg->dev, "## Unknown EP type ##\n"); | |
780 | break; | |
781 | } | |
782 | ||
783 | dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); | |
784 | if (dbg_hc(chan)) | |
785 | dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk); | |
786 | } | |
787 | ||
788 | static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg, | |
789 | struct dwc2_host_chan *chan) | |
790 | { | |
791 | u32 hcintmsk = HCINTMSK_CHHLTD; | |
792 | ||
793 | /* | |
794 | * For Descriptor DMA mode core halts the channel on AHB error. | |
795 | * Interrupt is not required. | |
796 | */ | |
95832c00 | 797 | if (!hsotg->params.dma_desc_enable) { |
b02038fa JY |
798 | if (dbg_hc(chan)) |
799 | dev_vdbg(hsotg->dev, "desc DMA disabled\n"); | |
800 | hcintmsk |= HCINTMSK_AHBERR; | |
801 | } else { | |
802 | if (dbg_hc(chan)) | |
803 | dev_vdbg(hsotg->dev, "desc DMA enabled\n"); | |
804 | if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
805 | hcintmsk |= HCINTMSK_XFERCOMPL; | |
806 | } | |
807 | ||
808 | if (chan->error_state && !chan->do_split && | |
809 | chan->ep_type != USB_ENDPOINT_XFER_ISOC) { | |
810 | if (dbg_hc(chan)) | |
811 | dev_vdbg(hsotg->dev, "setting ACK\n"); | |
812 | hcintmsk |= HCINTMSK_ACK; | |
813 | if (chan->ep_is_in) { | |
814 | hcintmsk |= HCINTMSK_DATATGLERR; | |
815 | if (chan->ep_type != USB_ENDPOINT_XFER_INT) | |
816 | hcintmsk |= HCINTMSK_NAK; | |
817 | } | |
818 | } | |
819 | ||
820 | dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); | |
821 | if (dbg_hc(chan)) | |
822 | dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk); | |
823 | } | |
824 | ||
825 | static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg, | |
826 | struct dwc2_host_chan *chan) | |
827 | { | |
828 | u32 intmsk; | |
829 | ||
95832c00 | 830 | if (hsotg->params.host_dma) { |
b02038fa JY |
831 | if (dbg_hc(chan)) |
832 | dev_vdbg(hsotg->dev, "DMA enabled\n"); | |
833 | dwc2_hc_enable_dma_ints(hsotg, chan); | |
834 | } else { | |
835 | if (dbg_hc(chan)) | |
836 | dev_vdbg(hsotg->dev, "DMA disabled\n"); | |
837 | dwc2_hc_enable_slave_ints(hsotg, chan); | |
838 | } | |
839 | ||
840 | /* Enable the top level host channel interrupt */ | |
841 | intmsk = dwc2_readl(hsotg->regs + HAINTMSK); | |
842 | intmsk |= 1 << chan->hc_num; | |
843 | dwc2_writel(intmsk, hsotg->regs + HAINTMSK); | |
844 | if (dbg_hc(chan)) | |
845 | dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk); | |
846 | ||
847 | /* Make sure host channel interrupts are enabled */ | |
848 | intmsk = dwc2_readl(hsotg->regs + GINTMSK); | |
849 | intmsk |= GINTSTS_HCHINT; | |
850 | dwc2_writel(intmsk, hsotg->regs + GINTMSK); | |
851 | if (dbg_hc(chan)) | |
852 | dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk); | |
853 | } | |
854 | ||
855 | /** | |
856 | * dwc2_hc_init() - Prepares a host channel for transferring packets to/from | |
857 | * a specific endpoint | |
858 | * | |
859 | * @hsotg: Programming view of DWC_otg controller | |
860 | * @chan: Information needed to initialize the host channel | |
861 | * | |
862 | * The HCCHARn register is set up with the characteristics specified in chan. | |
863 | * Host channel interrupts that may need to be serviced while this transfer is | |
864 | * in progress are enabled. | |
865 | */ | |
866 | static void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) | |
867 | { | |
868 | u8 hc_num = chan->hc_num; | |
869 | u32 hcintmsk; | |
870 | u32 hcchar; | |
871 | u32 hcsplt = 0; | |
872 | ||
873 | if (dbg_hc(chan)) | |
874 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
875 | ||
876 | /* Clear old interrupt conditions for this host channel */ | |
877 | hcintmsk = 0xffffffff; | |
878 | hcintmsk &= ~HCINTMSK_RESERVED14_31; | |
879 | dwc2_writel(hcintmsk, hsotg->regs + HCINT(hc_num)); | |
880 | ||
881 | /* Enable channel interrupts required for this transfer */ | |
882 | dwc2_hc_enable_ints(hsotg, chan); | |
883 | ||
884 | /* | |
885 | * Program the HCCHARn register with the endpoint characteristics for | |
886 | * the current transfer | |
887 | */ | |
888 | hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK; | |
889 | hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK; | |
890 | if (chan->ep_is_in) | |
891 | hcchar |= HCCHAR_EPDIR; | |
892 | if (chan->speed == USB_SPEED_LOW) | |
893 | hcchar |= HCCHAR_LSPDDEV; | |
894 | hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK; | |
895 | hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK; | |
896 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(hc_num)); | |
897 | if (dbg_hc(chan)) { | |
898 | dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n", | |
899 | hc_num, hcchar); | |
900 | ||
901 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", | |
902 | __func__, hc_num); | |
903 | dev_vdbg(hsotg->dev, " Dev Addr: %d\n", | |
904 | chan->dev_addr); | |
905 | dev_vdbg(hsotg->dev, " Ep Num: %d\n", | |
906 | chan->ep_num); | |
907 | dev_vdbg(hsotg->dev, " Is In: %d\n", | |
908 | chan->ep_is_in); | |
909 | dev_vdbg(hsotg->dev, " Is Low Speed: %d\n", | |
910 | chan->speed == USB_SPEED_LOW); | |
911 | dev_vdbg(hsotg->dev, " Ep Type: %d\n", | |
912 | chan->ep_type); | |
913 | dev_vdbg(hsotg->dev, " Max Pkt: %d\n", | |
914 | chan->max_packet); | |
915 | } | |
916 | ||
917 | /* Program the HCSPLT register for SPLITs */ | |
918 | if (chan->do_split) { | |
919 | if (dbg_hc(chan)) | |
920 | dev_vdbg(hsotg->dev, | |
921 | "Programming HC %d with split --> %s\n", | |
922 | hc_num, | |
923 | chan->complete_split ? "CSPLIT" : "SSPLIT"); | |
924 | if (chan->complete_split) | |
925 | hcsplt |= HCSPLT_COMPSPLT; | |
926 | hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT & | |
927 | HCSPLT_XACTPOS_MASK; | |
928 | hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT & | |
929 | HCSPLT_HUBADDR_MASK; | |
930 | hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT & | |
931 | HCSPLT_PRTADDR_MASK; | |
932 | if (dbg_hc(chan)) { | |
933 | dev_vdbg(hsotg->dev, " comp split %d\n", | |
934 | chan->complete_split); | |
935 | dev_vdbg(hsotg->dev, " xact pos %d\n", | |
936 | chan->xact_pos); | |
937 | dev_vdbg(hsotg->dev, " hub addr %d\n", | |
938 | chan->hub_addr); | |
939 | dev_vdbg(hsotg->dev, " hub port %d\n", | |
940 | chan->hub_port); | |
941 | dev_vdbg(hsotg->dev, " is_in %d\n", | |
942 | chan->ep_is_in); | |
943 | dev_vdbg(hsotg->dev, " Max Pkt %d\n", | |
944 | chan->max_packet); | |
945 | dev_vdbg(hsotg->dev, " xferlen %d\n", | |
946 | chan->xfer_len); | |
947 | } | |
948 | } | |
949 | ||
950 | dwc2_writel(hcsplt, hsotg->regs + HCSPLT(hc_num)); | |
951 | } | |
952 | ||
953 | /** | |
954 | * dwc2_hc_halt() - Attempts to halt a host channel | |
955 | * | |
956 | * @hsotg: Controller register interface | |
957 | * @chan: Host channel to halt | |
958 | * @halt_status: Reason for halting the channel | |
959 | * | |
960 | * This function should only be called in Slave mode or to abort a transfer in | |
961 | * either Slave mode or DMA mode. Under normal circumstances in DMA mode, the | |
962 | * controller halts the channel when the transfer is complete or a condition | |
963 | * occurs that requires application intervention. | |
964 | * | |
965 | * In slave mode, checks for a free request queue entry, then sets the Channel | |
966 | * Enable and Channel Disable bits of the Host Channel Characteristics | |
967 | * register of the specified channel to intiate the halt. If there is no free | |
968 | * request queue entry, sets only the Channel Disable bit of the HCCHARn | |
969 | * register to flush requests for this channel. In the latter case, sets a | |
970 | * flag to indicate that the host channel needs to be halted when a request | |
971 | * queue slot is open. | |
972 | * | |
973 | * In DMA mode, always sets the Channel Enable and Channel Disable bits of the | |
974 | * HCCHARn register. The controller ensures there is space in the request | |
975 | * queue before submitting the halt request. | |
976 | * | |
977 | * Some time may elapse before the core flushes any posted requests for this | |
978 | * host channel and halts. The Channel Halted interrupt handler completes the | |
979 | * deactivation of the host channel. | |
980 | */ | |
981 | void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, | |
982 | enum dwc2_halt_status halt_status) | |
983 | { | |
984 | u32 nptxsts, hptxsts, hcchar; | |
985 | ||
986 | if (dbg_hc(chan)) | |
987 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
988 | if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS) | |
989 | dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status); | |
990 | ||
991 | if (halt_status == DWC2_HC_XFER_URB_DEQUEUE || | |
992 | halt_status == DWC2_HC_XFER_AHB_ERR) { | |
993 | /* | |
994 | * Disable all channel interrupts except Ch Halted. The QTD | |
995 | * and QH state associated with this transfer has been cleared | |
996 | * (in the case of URB_DEQUEUE), so the channel needs to be | |
997 | * shut down carefully to prevent crashes. | |
998 | */ | |
999 | u32 hcintmsk = HCINTMSK_CHHLTD; | |
1000 | ||
1001 | dev_vdbg(hsotg->dev, "dequeue/error\n"); | |
1002 | dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); | |
1003 | ||
1004 | /* | |
1005 | * Make sure no other interrupts besides halt are currently | |
1006 | * pending. Handling another interrupt could cause a crash due | |
1007 | * to the QTD and QH state. | |
1008 | */ | |
1009 | dwc2_writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num)); | |
1010 | ||
1011 | /* | |
1012 | * Make sure the halt status is set to URB_DEQUEUE or AHB_ERR | |
1013 | * even if the channel was already halted for some other | |
1014 | * reason | |
1015 | */ | |
1016 | chan->halt_status = halt_status; | |
1017 | ||
1018 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
1019 | if (!(hcchar & HCCHAR_CHENA)) { | |
1020 | /* | |
1021 | * The channel is either already halted or it hasn't | |
1022 | * started yet. In DMA mode, the transfer may halt if | |
1023 | * it finishes normally or a condition occurs that | |
1024 | * requires driver intervention. Don't want to halt | |
1025 | * the channel again. In either Slave or DMA mode, | |
1026 | * it's possible that the transfer has been assigned | |
1027 | * to a channel, but not started yet when an URB is | |
1028 | * dequeued. Don't want to halt a channel that hasn't | |
1029 | * started yet. | |
1030 | */ | |
1031 | return; | |
1032 | } | |
1033 | } | |
1034 | if (chan->halt_pending) { | |
1035 | /* | |
1036 | * A halt has already been issued for this channel. This might | |
1037 | * happen when a transfer is aborted by a higher level in | |
1038 | * the stack. | |
1039 | */ | |
1040 | dev_vdbg(hsotg->dev, | |
1041 | "*** %s: Channel %d, chan->halt_pending already set ***\n", | |
1042 | __func__, chan->hc_num); | |
1043 | return; | |
1044 | } | |
1045 | ||
1046 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
1047 | ||
1048 | /* No need to set the bit in DDMA for disabling the channel */ | |
1049 | /* TODO check it everywhere channel is disabled */ | |
95832c00 | 1050 | if (!hsotg->params.dma_desc_enable) { |
b02038fa JY |
1051 | if (dbg_hc(chan)) |
1052 | dev_vdbg(hsotg->dev, "desc DMA disabled\n"); | |
1053 | hcchar |= HCCHAR_CHENA; | |
1054 | } else { | |
1055 | if (dbg_hc(chan)) | |
1056 | dev_dbg(hsotg->dev, "desc DMA enabled\n"); | |
1057 | } | |
1058 | hcchar |= HCCHAR_CHDIS; | |
1059 | ||
95832c00 | 1060 | if (!hsotg->params.host_dma) { |
b02038fa JY |
1061 | if (dbg_hc(chan)) |
1062 | dev_vdbg(hsotg->dev, "DMA not enabled\n"); | |
1063 | hcchar |= HCCHAR_CHENA; | |
1064 | ||
1065 | /* Check for space in the request queue to issue the halt */ | |
1066 | if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL || | |
1067 | chan->ep_type == USB_ENDPOINT_XFER_BULK) { | |
1068 | dev_vdbg(hsotg->dev, "control/bulk\n"); | |
1069 | nptxsts = dwc2_readl(hsotg->regs + GNPTXSTS); | |
1070 | if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) { | |
1071 | dev_vdbg(hsotg->dev, "Disabling channel\n"); | |
1072 | hcchar &= ~HCCHAR_CHENA; | |
1073 | } | |
1074 | } else { | |
1075 | if (dbg_perio()) | |
1076 | dev_vdbg(hsotg->dev, "isoc/intr\n"); | |
1077 | hptxsts = dwc2_readl(hsotg->regs + HPTXSTS); | |
1078 | if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 || | |
1079 | hsotg->queuing_high_bandwidth) { | |
1080 | if (dbg_perio()) | |
1081 | dev_vdbg(hsotg->dev, "Disabling channel\n"); | |
1082 | hcchar &= ~HCCHAR_CHENA; | |
1083 | } | |
1084 | } | |
1085 | } else { | |
1086 | if (dbg_hc(chan)) | |
1087 | dev_vdbg(hsotg->dev, "DMA enabled\n"); | |
1088 | } | |
1089 | ||
1090 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); | |
1091 | chan->halt_status = halt_status; | |
1092 | ||
1093 | if (hcchar & HCCHAR_CHENA) { | |
1094 | if (dbg_hc(chan)) | |
1095 | dev_vdbg(hsotg->dev, "Channel enabled\n"); | |
1096 | chan->halt_pending = 1; | |
1097 | chan->halt_on_queue = 0; | |
1098 | } else { | |
1099 | if (dbg_hc(chan)) | |
1100 | dev_vdbg(hsotg->dev, "Channel disabled\n"); | |
1101 | chan->halt_on_queue = 1; | |
1102 | } | |
1103 | ||
1104 | if (dbg_hc(chan)) { | |
1105 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, | |
1106 | chan->hc_num); | |
1107 | dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n", | |
1108 | hcchar); | |
1109 | dev_vdbg(hsotg->dev, " halt_pending: %d\n", | |
1110 | chan->halt_pending); | |
1111 | dev_vdbg(hsotg->dev, " halt_on_queue: %d\n", | |
1112 | chan->halt_on_queue); | |
1113 | dev_vdbg(hsotg->dev, " halt_status: %d\n", | |
1114 | chan->halt_status); | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * dwc2_hc_cleanup() - Clears the transfer state for a host channel | |
1120 | * | |
1121 | * @hsotg: Programming view of DWC_otg controller | |
1122 | * @chan: Identifies the host channel to clean up | |
1123 | * | |
1124 | * This function is normally called after a transfer is done and the host | |
1125 | * channel is being released | |
1126 | */ | |
1127 | void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) | |
1128 | { | |
1129 | u32 hcintmsk; | |
1130 | ||
1131 | chan->xfer_started = 0; | |
1132 | ||
1133 | list_del_init(&chan->split_order_list_entry); | |
1134 | ||
1135 | /* | |
1136 | * Clear channel interrupt enables and any unhandled channel interrupt | |
1137 | * conditions | |
1138 | */ | |
1139 | dwc2_writel(0, hsotg->regs + HCINTMSK(chan->hc_num)); | |
1140 | hcintmsk = 0xffffffff; | |
1141 | hcintmsk &= ~HCINTMSK_RESERVED14_31; | |
1142 | dwc2_writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num)); | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in | |
1147 | * which frame a periodic transfer should occur | |
1148 | * | |
1149 | * @hsotg: Programming view of DWC_otg controller | |
1150 | * @chan: Identifies the host channel to set up and its properties | |
1151 | * @hcchar: Current value of the HCCHAR register for the specified host channel | |
1152 | * | |
1153 | * This function has no effect on non-periodic transfers | |
1154 | */ | |
1155 | static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg, | |
1156 | struct dwc2_host_chan *chan, u32 *hcchar) | |
1157 | { | |
1158 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1159 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
1160 | int host_speed; | |
1161 | int xfer_ns; | |
1162 | int xfer_us; | |
1163 | int bytes_in_fifo; | |
1164 | u16 fifo_space; | |
1165 | u16 frame_number; | |
1166 | u16 wire_frame; | |
1167 | ||
1168 | /* | |
1169 | * Try to figure out if we're an even or odd frame. If we set | |
1170 | * even and the current frame number is even the the transfer | |
1171 | * will happen immediately. Similar if both are odd. If one is | |
1172 | * even and the other is odd then the transfer will happen when | |
1173 | * the frame number ticks. | |
1174 | * | |
1175 | * There's a bit of a balancing act to get this right. | |
1176 | * Sometimes we may want to send data in the current frame (AK | |
1177 | * right away). We might want to do this if the frame number | |
1178 | * _just_ ticked, but we might also want to do this in order | |
1179 | * to continue a split transaction that happened late in a | |
1180 | * microframe (so we didn't know to queue the next transfer | |
1181 | * until the frame number had ticked). The problem is that we | |
1182 | * need a lot of knowledge to know if there's actually still | |
1183 | * time to send things or if it would be better to wait until | |
1184 | * the next frame. | |
1185 | * | |
1186 | * We can look at how much time is left in the current frame | |
1187 | * and make a guess about whether we'll have time to transfer. | |
1188 | * We'll do that. | |
1189 | */ | |
1190 | ||
1191 | /* Get speed host is running at */ | |
1192 | host_speed = (chan->speed != USB_SPEED_HIGH && | |
1193 | !chan->do_split) ? chan->speed : USB_SPEED_HIGH; | |
1194 | ||
1195 | /* See how many bytes are in the periodic FIFO right now */ | |
1196 | fifo_space = (dwc2_readl(hsotg->regs + HPTXSTS) & | |
1197 | TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT; | |
1198 | bytes_in_fifo = sizeof(u32) * | |
bea8e86c | 1199 | (hsotg->params.host_perio_tx_fifo_size - |
b02038fa JY |
1200 | fifo_space); |
1201 | ||
1202 | /* | |
1203 | * Roughly estimate bus time for everything in the periodic | |
1204 | * queue + our new transfer. This is "rough" because we're | |
1205 | * using a function that makes takes into account IN/OUT | |
1206 | * and INT/ISO and we're just slamming in one value for all | |
1207 | * transfers. This should be an over-estimate and that should | |
1208 | * be OK, but we can probably tighten it. | |
1209 | */ | |
1210 | xfer_ns = usb_calc_bus_time(host_speed, false, false, | |
1211 | chan->xfer_len + bytes_in_fifo); | |
1212 | xfer_us = NS_TO_US(xfer_ns); | |
1213 | ||
1214 | /* See what frame number we'll be at by the time we finish */ | |
1215 | frame_number = dwc2_hcd_get_future_frame_number(hsotg, xfer_us); | |
1216 | ||
1217 | /* This is when we were scheduled to be on the wire */ | |
1218 | wire_frame = dwc2_frame_num_inc(chan->qh->next_active_frame, 1); | |
1219 | ||
1220 | /* | |
1221 | * If we'd finish _after_ the frame we're scheduled in then | |
1222 | * it's hopeless. Just schedule right away and hope for the | |
1223 | * best. Note that it _might_ be wise to call back into the | |
1224 | * scheduler to pick a better frame, but this is better than | |
1225 | * nothing. | |
1226 | */ | |
1227 | if (dwc2_frame_num_gt(frame_number, wire_frame)) { | |
1228 | dwc2_sch_vdbg(hsotg, | |
1229 | "QH=%p EO MISS fr=%04x=>%04x (%+d)\n", | |
1230 | chan->qh, wire_frame, frame_number, | |
1231 | dwc2_frame_num_dec(frame_number, | |
1232 | wire_frame)); | |
1233 | wire_frame = frame_number; | |
1234 | ||
1235 | /* | |
1236 | * We picked a different frame number; communicate this | |
1237 | * back to the scheduler so it doesn't try to schedule | |
1238 | * another in the same frame. | |
1239 | * | |
1240 | * Remember that next_active_frame is 1 before the wire | |
1241 | * frame. | |
1242 | */ | |
1243 | chan->qh->next_active_frame = | |
1244 | dwc2_frame_num_dec(frame_number, 1); | |
1245 | } | |
1246 | ||
1247 | if (wire_frame & 1) | |
1248 | *hcchar |= HCCHAR_ODDFRM; | |
1249 | else | |
1250 | *hcchar &= ~HCCHAR_ODDFRM; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan) | |
1255 | { | |
1256 | /* Set up the initial PID for the transfer */ | |
1257 | if (chan->speed == USB_SPEED_HIGH) { | |
1258 | if (chan->ep_is_in) { | |
1259 | if (chan->multi_count == 1) | |
1260 | chan->data_pid_start = DWC2_HC_PID_DATA0; | |
1261 | else if (chan->multi_count == 2) | |
1262 | chan->data_pid_start = DWC2_HC_PID_DATA1; | |
1263 | else | |
1264 | chan->data_pid_start = DWC2_HC_PID_DATA2; | |
1265 | } else { | |
1266 | if (chan->multi_count == 1) | |
1267 | chan->data_pid_start = DWC2_HC_PID_DATA0; | |
1268 | else | |
1269 | chan->data_pid_start = DWC2_HC_PID_MDATA; | |
1270 | } | |
1271 | } else { | |
1272 | chan->data_pid_start = DWC2_HC_PID_DATA0; | |
1273 | } | |
1274 | } | |
1275 | ||
7359d482 | 1276 | /** |
b02038fa JY |
1277 | * dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with |
1278 | * the Host Channel | |
7359d482 PZ |
1279 | * |
1280 | * @hsotg: Programming view of DWC_otg controller | |
b02038fa | 1281 | * @chan: Information needed to initialize the host channel |
7359d482 | 1282 | * |
b02038fa JY |
1283 | * This function should only be called in Slave mode. For a channel associated |
1284 | * with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel | |
1285 | * associated with a periodic EP, the periodic Tx FIFO is written. | |
7359d482 | 1286 | * |
b02038fa JY |
1287 | * Upon return the xfer_buf and xfer_count fields in chan are incremented by |
1288 | * the number of bytes written to the Tx FIFO. | |
7359d482 | 1289 | */ |
b02038fa JY |
1290 | static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg, |
1291 | struct dwc2_host_chan *chan) | |
1292 | { | |
1293 | u32 i; | |
1294 | u32 remaining_count; | |
1295 | u32 byte_count; | |
1296 | u32 dword_count; | |
1297 | u32 __iomem *data_fifo; | |
1298 | u32 *data_buf = (u32 *)chan->xfer_buf; | |
1299 | ||
1300 | if (dbg_hc(chan)) | |
1301 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
1302 | ||
1303 | data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num)); | |
1304 | ||
1305 | remaining_count = chan->xfer_len - chan->xfer_count; | |
1306 | if (remaining_count > chan->max_packet) | |
1307 | byte_count = chan->max_packet; | |
1308 | else | |
1309 | byte_count = remaining_count; | |
1310 | ||
1311 | dword_count = (byte_count + 3) / 4; | |
1312 | ||
1313 | if (((unsigned long)data_buf & 0x3) == 0) { | |
1314 | /* xfer_buf is DWORD aligned */ | |
1315 | for (i = 0; i < dword_count; i++, data_buf++) | |
1316 | dwc2_writel(*data_buf, data_fifo); | |
1317 | } else { | |
1318 | /* xfer_buf is not DWORD aligned */ | |
1319 | for (i = 0; i < dword_count; i++, data_buf++) { | |
1320 | u32 data = data_buf[0] | data_buf[1] << 8 | | |
1321 | data_buf[2] << 16 | data_buf[3] << 24; | |
1322 | dwc2_writel(data, data_fifo); | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | chan->xfer_count += byte_count; | |
1327 | chan->xfer_buf += byte_count; | |
1328 | } | |
1329 | ||
1330 | /** | |
1331 | * dwc2_hc_do_ping() - Starts a PING transfer | |
1332 | * | |
1333 | * @hsotg: Programming view of DWC_otg controller | |
1334 | * @chan: Information needed to initialize the host channel | |
1335 | * | |
1336 | * This function should only be called in Slave mode. The Do Ping bit is set in | |
1337 | * the HCTSIZ register, then the channel is enabled. | |
1338 | */ | |
1339 | static void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg, | |
1340 | struct dwc2_host_chan *chan) | |
7359d482 | 1341 | { |
7359d482 | 1342 | u32 hcchar; |
7359d482 | 1343 | u32 hctsiz; |
7359d482 | 1344 | |
b02038fa JY |
1345 | if (dbg_hc(chan)) |
1346 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, | |
1347 | chan->hc_num); | |
1348 | ||
1349 | hctsiz = TSIZ_DOPNG; | |
1350 | hctsiz |= 1 << TSIZ_PKTCNT_SHIFT; | |
1351 | dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); | |
7359d482 | 1352 | |
95c8bc36 | 1353 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); |
b02038fa JY |
1354 | hcchar |= HCCHAR_CHENA; |
1355 | hcchar &= ~HCCHAR_CHDIS; | |
1356 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); | |
1357 | } | |
7359d482 | 1358 | |
b02038fa JY |
1359 | /** |
1360 | * dwc2_hc_start_transfer() - Does the setup for a data transfer for a host | |
1361 | * channel and starts the transfer | |
1362 | * | |
1363 | * @hsotg: Programming view of DWC_otg controller | |
1364 | * @chan: Information needed to initialize the host channel. The xfer_len value | |
1365 | * may be reduced to accommodate the max widths of the XferSize and | |
1366 | * PktCnt fields in the HCTSIZn register. The multi_count value may be | |
1367 | * changed to reflect the final xfer_len value. | |
1368 | * | |
1369 | * This function may be called in either Slave mode or DMA mode. In Slave mode, | |
1370 | * the caller must ensure that there is sufficient space in the request queue | |
1371 | * and Tx Data FIFO. | |
1372 | * | |
1373 | * For an OUT transfer in Slave mode, it loads a data packet into the | |
1374 | * appropriate FIFO. If necessary, additional data packets are loaded in the | |
1375 | * Host ISR. | |
1376 | * | |
1377 | * For an IN transfer in Slave mode, a data packet is requested. The data | |
1378 | * packets are unloaded from the Rx FIFO in the Host ISR. If necessary, | |
1379 | * additional data packets are requested in the Host ISR. | |
1380 | * | |
1381 | * For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ | |
1382 | * register along with a packet count of 1 and the channel is enabled. This | |
1383 | * causes a single PING transaction to occur. Other fields in HCTSIZ are | |
1384 | * simply set to 0 since no data transfer occurs in this case. | |
1385 | * | |
1386 | * For a PING transfer in DMA mode, the HCTSIZ register is initialized with | |
1387 | * all the information required to perform the subsequent data transfer. In | |
1388 | * addition, the Do Ping bit is set in the HCTSIZ register. In this case, the | |
1389 | * controller performs the entire PING protocol, then starts the data | |
1390 | * transfer. | |
1391 | */ | |
1392 | static void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg, | |
1393 | struct dwc2_host_chan *chan) | |
1394 | { | |
bea8e86c JY |
1395 | u32 max_hc_xfer_size = hsotg->params.max_transfer_size; |
1396 | u16 max_hc_pkt_count = hsotg->params.max_packet_count; | |
b02038fa JY |
1397 | u32 hcchar; |
1398 | u32 hctsiz = 0; | |
1399 | u16 num_packets; | |
1400 | u32 ec_mc; | |
1401 | ||
1402 | if (dbg_hc(chan)) | |
1403 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
1404 | ||
1405 | if (chan->do_ping) { | |
95832c00 | 1406 | if (!hsotg->params.host_dma) { |
b02038fa JY |
1407 | if (dbg_hc(chan)) |
1408 | dev_vdbg(hsotg->dev, "ping, no DMA\n"); | |
1409 | dwc2_hc_do_ping(hsotg, chan); | |
1410 | chan->xfer_started = 1; | |
1411 | return; | |
1412 | } | |
7359d482 | 1413 | |
b02038fa JY |
1414 | if (dbg_hc(chan)) |
1415 | dev_vdbg(hsotg->dev, "ping, DMA\n"); | |
1416 | ||
1417 | hctsiz |= TSIZ_DOPNG; | |
7359d482 | 1418 | } |
b02038fa JY |
1419 | |
1420 | if (chan->do_split) { | |
1421 | if (dbg_hc(chan)) | |
1422 | dev_vdbg(hsotg->dev, "split\n"); | |
1423 | num_packets = 1; | |
1424 | ||
1425 | if (chan->complete_split && !chan->ep_is_in) | |
1426 | /* | |
1427 | * For CSPLIT OUT Transfer, set the size to 0 so the | |
1428 | * core doesn't expect any data written to the FIFO | |
1429 | */ | |
1430 | chan->xfer_len = 0; | |
1431 | else if (chan->ep_is_in || chan->xfer_len > chan->max_packet) | |
1432 | chan->xfer_len = chan->max_packet; | |
1433 | else if (!chan->ep_is_in && chan->xfer_len > 188) | |
1434 | chan->xfer_len = 188; | |
1435 | ||
1436 | hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT & | |
1437 | TSIZ_XFERSIZE_MASK; | |
1438 | ||
1439 | /* For split set ec_mc for immediate retries */ | |
1440 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1441 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
1442 | ec_mc = 3; | |
1443 | else | |
1444 | ec_mc = 1; | |
1445 | } else { | |
1446 | if (dbg_hc(chan)) | |
1447 | dev_vdbg(hsotg->dev, "no split\n"); | |
1448 | /* | |
1449 | * Ensure that the transfer length and packet count will fit | |
1450 | * in the widths allocated for them in the HCTSIZn register | |
1451 | */ | |
1452 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1453 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
1454 | /* | |
1455 | * Make sure the transfer size is no larger than one | |
1456 | * (micro)frame's worth of data. (A check was done | |
1457 | * when the periodic transfer was accepted to ensure | |
1458 | * that a (micro)frame's worth of data can be | |
1459 | * programmed into a channel.) | |
1460 | */ | |
1461 | u32 max_periodic_len = | |
1462 | chan->multi_count * chan->max_packet; | |
1463 | ||
1464 | if (chan->xfer_len > max_periodic_len) | |
1465 | chan->xfer_len = max_periodic_len; | |
1466 | } else if (chan->xfer_len > max_hc_xfer_size) { | |
1467 | /* | |
1468 | * Make sure that xfer_len is a multiple of max packet | |
1469 | * size | |
1470 | */ | |
1471 | chan->xfer_len = | |
1472 | max_hc_xfer_size - chan->max_packet + 1; | |
1473 | } | |
1474 | ||
1475 | if (chan->xfer_len > 0) { | |
1476 | num_packets = (chan->xfer_len + chan->max_packet - 1) / | |
1477 | chan->max_packet; | |
1478 | if (num_packets > max_hc_pkt_count) { | |
1479 | num_packets = max_hc_pkt_count; | |
1480 | chan->xfer_len = num_packets * chan->max_packet; | |
1481 | } | |
1482 | } else { | |
1483 | /* Need 1 packet for transfer length of 0 */ | |
1484 | num_packets = 1; | |
1485 | } | |
1486 | ||
1487 | if (chan->ep_is_in) | |
1488 | /* | |
1489 | * Always program an integral # of max packets for IN | |
1490 | * transfers | |
1491 | */ | |
1492 | chan->xfer_len = num_packets * chan->max_packet; | |
1493 | ||
1494 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1495 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
1496 | /* | |
1497 | * Make sure that the multi_count field matches the | |
1498 | * actual transfer length | |
1499 | */ | |
1500 | chan->multi_count = num_packets; | |
1501 | ||
1502 | if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
1503 | dwc2_set_pid_isoc(chan); | |
1504 | ||
1505 | hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT & | |
1506 | TSIZ_XFERSIZE_MASK; | |
1507 | ||
1508 | /* The ec_mc gets the multi_count for non-split */ | |
1509 | ec_mc = chan->multi_count; | |
1510 | } | |
1511 | ||
1512 | chan->start_pkt_count = num_packets; | |
1513 | hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK; | |
1514 | hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT & | |
1515 | TSIZ_SC_MC_PID_MASK; | |
1516 | dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); | |
1517 | if (dbg_hc(chan)) { | |
1518 | dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n", | |
1519 | hctsiz, chan->hc_num); | |
1520 | ||
1521 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, | |
1522 | chan->hc_num); | |
1523 | dev_vdbg(hsotg->dev, " Xfer Size: %d\n", | |
1524 | (hctsiz & TSIZ_XFERSIZE_MASK) >> | |
1525 | TSIZ_XFERSIZE_SHIFT); | |
1526 | dev_vdbg(hsotg->dev, " Num Pkts: %d\n", | |
1527 | (hctsiz & TSIZ_PKTCNT_MASK) >> | |
1528 | TSIZ_PKTCNT_SHIFT); | |
1529 | dev_vdbg(hsotg->dev, " Start PID: %d\n", | |
1530 | (hctsiz & TSIZ_SC_MC_PID_MASK) >> | |
1531 | TSIZ_SC_MC_PID_SHIFT); | |
1532 | } | |
1533 | ||
95832c00 | 1534 | if (hsotg->params.host_dma) { |
b02038fa JY |
1535 | dwc2_writel((u32)chan->xfer_dma, |
1536 | hsotg->regs + HCDMA(chan->hc_num)); | |
1537 | if (dbg_hc(chan)) | |
1538 | dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n", | |
1539 | (unsigned long)chan->xfer_dma, chan->hc_num); | |
1540 | } | |
1541 | ||
1542 | /* Start the split */ | |
1543 | if (chan->do_split) { | |
1544 | u32 hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num)); | |
1545 | ||
1546 | hcsplt |= HCSPLT_SPLTENA; | |
1547 | dwc2_writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num)); | |
1548 | } | |
1549 | ||
1550 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
1551 | hcchar &= ~HCCHAR_MULTICNT_MASK; | |
1552 | hcchar |= (ec_mc << HCCHAR_MULTICNT_SHIFT) & HCCHAR_MULTICNT_MASK; | |
1553 | dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar); | |
1554 | ||
1555 | if (hcchar & HCCHAR_CHDIS) | |
1556 | dev_warn(hsotg->dev, | |
1557 | "%s: chdis set, channel %d, hcchar 0x%08x\n", | |
1558 | __func__, chan->hc_num, hcchar); | |
1559 | ||
1560 | /* Set host channel enable after all other setup is complete */ | |
1561 | hcchar |= HCCHAR_CHENA; | |
1562 | hcchar &= ~HCCHAR_CHDIS; | |
1563 | ||
1564 | if (dbg_hc(chan)) | |
1565 | dev_vdbg(hsotg->dev, " Multi Cnt: %d\n", | |
1566 | (hcchar & HCCHAR_MULTICNT_MASK) >> | |
1567 | HCCHAR_MULTICNT_SHIFT); | |
1568 | ||
1569 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); | |
1570 | if (dbg_hc(chan)) | |
1571 | dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar, | |
1572 | chan->hc_num); | |
1573 | ||
1574 | chan->xfer_started = 1; | |
1575 | chan->requests++; | |
1576 | ||
95832c00 | 1577 | if (!hsotg->params.host_dma && |
b02038fa JY |
1578 | !chan->ep_is_in && chan->xfer_len > 0) |
1579 | /* Load OUT packet into the appropriate Tx FIFO */ | |
1580 | dwc2_hc_write_packet(hsotg, chan); | |
1581 | } | |
1582 | ||
1583 | /** | |
1584 | * dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a | |
1585 | * host channel and starts the transfer in Descriptor DMA mode | |
1586 | * | |
1587 | * @hsotg: Programming view of DWC_otg controller | |
1588 | * @chan: Information needed to initialize the host channel | |
1589 | * | |
1590 | * Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set. | |
1591 | * Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field | |
1592 | * with micro-frame bitmap. | |
1593 | * | |
1594 | * Initializes HCDMA register with descriptor list address and CTD value then | |
1595 | * starts the transfer via enabling the channel. | |
1596 | */ | |
1597 | void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg, | |
1598 | struct dwc2_host_chan *chan) | |
1599 | { | |
1600 | u32 hcchar; | |
1601 | u32 hctsiz = 0; | |
1602 | ||
1603 | if (chan->do_ping) | |
1604 | hctsiz |= TSIZ_DOPNG; | |
1605 | ||
1606 | if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
1607 | dwc2_set_pid_isoc(chan); | |
1608 | ||
1609 | /* Packet Count and Xfer Size are not used in Descriptor DMA mode */ | |
1610 | hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT & | |
1611 | TSIZ_SC_MC_PID_MASK; | |
1612 | ||
1613 | /* 0 - 1 descriptor, 1 - 2 descriptors, etc */ | |
1614 | hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK; | |
1615 | ||
1616 | /* Non-zero only for high-speed interrupt endpoints */ | |
1617 | hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK; | |
1618 | ||
1619 | if (dbg_hc(chan)) { | |
1620 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, | |
1621 | chan->hc_num); | |
1622 | dev_vdbg(hsotg->dev, " Start PID: %d\n", | |
1623 | chan->data_pid_start); | |
1624 | dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1); | |
1625 | } | |
1626 | ||
1627 | dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); | |
1628 | ||
1629 | dma_sync_single_for_device(hsotg->dev, chan->desc_list_addr, | |
1630 | chan->desc_list_sz, DMA_TO_DEVICE); | |
1631 | ||
1632 | dwc2_writel(chan->desc_list_addr, hsotg->regs + HCDMA(chan->hc_num)); | |
1633 | ||
1634 | if (dbg_hc(chan)) | |
1635 | dev_vdbg(hsotg->dev, "Wrote %pad to HCDMA(%d)\n", | |
1636 | &chan->desc_list_addr, chan->hc_num); | |
1637 | ||
1638 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
1639 | hcchar &= ~HCCHAR_MULTICNT_MASK; | |
1640 | hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT & | |
1641 | HCCHAR_MULTICNT_MASK; | |
1642 | ||
1643 | if (hcchar & HCCHAR_CHDIS) | |
1644 | dev_warn(hsotg->dev, | |
1645 | "%s: chdis set, channel %d, hcchar 0x%08x\n", | |
1646 | __func__, chan->hc_num, hcchar); | |
1647 | ||
1648 | /* Set host channel enable after all other setup is complete */ | |
1649 | hcchar |= HCCHAR_CHENA; | |
1650 | hcchar &= ~HCCHAR_CHDIS; | |
1651 | ||
1652 | if (dbg_hc(chan)) | |
1653 | dev_vdbg(hsotg->dev, " Multi Cnt: %d\n", | |
1654 | (hcchar & HCCHAR_MULTICNT_MASK) >> | |
1655 | HCCHAR_MULTICNT_SHIFT); | |
1656 | ||
1657 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); | |
1658 | if (dbg_hc(chan)) | |
1659 | dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar, | |
1660 | chan->hc_num); | |
1661 | ||
1662 | chan->xfer_started = 1; | |
1663 | chan->requests++; | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * dwc2_hc_continue_transfer() - Continues a data transfer that was started by | |
1668 | * a previous call to dwc2_hc_start_transfer() | |
1669 | * | |
1670 | * @hsotg: Programming view of DWC_otg controller | |
1671 | * @chan: Information needed to initialize the host channel | |
1672 | * | |
1673 | * The caller must ensure there is sufficient space in the request queue and Tx | |
1674 | * Data FIFO. This function should only be called in Slave mode. In DMA mode, | |
1675 | * the controller acts autonomously to complete transfers programmed to a host | |
1676 | * channel. | |
1677 | * | |
1678 | * For an OUT transfer, a new data packet is loaded into the appropriate FIFO | |
1679 | * if there is any data remaining to be queued. For an IN transfer, another | |
1680 | * data packet is always requested. For the SETUP phase of a control transfer, | |
1681 | * this function does nothing. | |
1682 | * | |
1683 | * Return: 1 if a new request is queued, 0 if no more requests are required | |
1684 | * for this transfer | |
1685 | */ | |
1686 | static int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg, | |
1687 | struct dwc2_host_chan *chan) | |
1688 | { | |
1689 | if (dbg_hc(chan)) | |
1690 | dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, | |
1691 | chan->hc_num); | |
1692 | ||
1693 | if (chan->do_split) | |
1694 | /* SPLITs always queue just once per channel */ | |
1695 | return 0; | |
1696 | ||
1697 | if (chan->data_pid_start == DWC2_HC_PID_SETUP) | |
1698 | /* SETUPs are queued only once since they can't be NAK'd */ | |
1699 | return 0; | |
1700 | ||
1701 | if (chan->ep_is_in) { | |
1702 | /* | |
1703 | * Always queue another request for other IN transfers. If | |
1704 | * back-to-back INs are issued and NAKs are received for both, | |
1705 | * the driver may still be processing the first NAK when the | |
1706 | * second NAK is received. When the interrupt handler clears | |
1707 | * the NAK interrupt for the first NAK, the second NAK will | |
1708 | * not be seen. So we can't depend on the NAK interrupt | |
1709 | * handler to requeue a NAK'd request. Instead, IN requests | |
1710 | * are issued each time this function is called. When the | |
1711 | * transfer completes, the extra requests for the channel will | |
1712 | * be flushed. | |
1713 | */ | |
1714 | u32 hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); | |
1715 | ||
1716 | dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar); | |
1717 | hcchar |= HCCHAR_CHENA; | |
1718 | hcchar &= ~HCCHAR_CHDIS; | |
1719 | if (dbg_hc(chan)) | |
1720 | dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n", | |
1721 | hcchar); | |
1722 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); | |
1723 | chan->requests++; | |
1724 | return 1; | |
1725 | } | |
1726 | ||
1727 | /* OUT transfers */ | |
1728 | ||
1729 | if (chan->xfer_count < chan->xfer_len) { | |
1730 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1731 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
1732 | u32 hcchar = dwc2_readl(hsotg->regs + | |
1733 | HCCHAR(chan->hc_num)); | |
1734 | ||
1735 | dwc2_hc_set_even_odd_frame(hsotg, chan, | |
1736 | &hcchar); | |
1737 | } | |
1738 | ||
1739 | /* Load OUT packet into the appropriate Tx FIFO */ | |
1740 | dwc2_hc_write_packet(hsotg, chan); | |
1741 | chan->requests++; | |
1742 | return 1; | |
1743 | } | |
1744 | ||
1745 | return 0; | |
7359d482 PZ |
1746 | } |
1747 | ||
b02038fa JY |
1748 | /* |
1749 | * ========================================================================= | |
1750 | * HCD | |
1751 | * ========================================================================= | |
1752 | */ | |
1753 | ||
7359d482 PZ |
1754 | /* |
1755 | * Processes all the URBs in a single list of QHs. Completes them with | |
1756 | * -ETIMEDOUT and frees the QTD. | |
1757 | * | |
1758 | * Must be called with interrupt disabled and spinlock held | |
1759 | */ | |
1760 | static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg, | |
1761 | struct list_head *qh_list) | |
1762 | { | |
1763 | struct dwc2_qh *qh, *qh_tmp; | |
1764 | struct dwc2_qtd *qtd, *qtd_tmp; | |
1765 | ||
1766 | list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { | |
1767 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, | |
1768 | qtd_list_entry) { | |
2e84da6e | 1769 | dwc2_host_complete(hsotg, qtd, -ECONNRESET); |
0d012b98 | 1770 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); |
7359d482 PZ |
1771 | } |
1772 | } | |
1773 | } | |
1774 | ||
1775 | static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg, | |
1776 | struct list_head *qh_list) | |
1777 | { | |
1778 | struct dwc2_qtd *qtd, *qtd_tmp; | |
1779 | struct dwc2_qh *qh, *qh_tmp; | |
1780 | unsigned long flags; | |
1781 | ||
1782 | if (!qh_list->next) | |
1783 | /* The list hasn't been initialized yet */ | |
1784 | return; | |
1785 | ||
1786 | spin_lock_irqsave(&hsotg->lock, flags); | |
1787 | ||
1788 | /* Ensure there are no QTDs or URBs left */ | |
1789 | dwc2_kill_urbs_in_qh_list(hsotg, qh_list); | |
1790 | ||
1791 | list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) { | |
1792 | dwc2_hcd_qh_unlink(hsotg, qh); | |
1793 | ||
1794 | /* Free each QTD in the QH's QTD list */ | |
1795 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, | |
1796 | qtd_list_entry) | |
1797 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
1798 | ||
16e80218 DA |
1799 | if (qh->channel && qh->channel->qh == qh) |
1800 | qh->channel->qh = NULL; | |
1801 | ||
7359d482 PZ |
1802 | spin_unlock_irqrestore(&hsotg->lock, flags); |
1803 | dwc2_hcd_qh_free(hsotg, qh); | |
1804 | spin_lock_irqsave(&hsotg->lock, flags); | |
1805 | } | |
1806 | ||
1807 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic | |
1812 | * and periodic schedules. The QTD associated with each URB is removed from | |
1813 | * the schedule and freed. This function may be called when a disconnect is | |
1814 | * detected or when the HCD is being stopped. | |
1815 | * | |
1816 | * Must be called with interrupt disabled and spinlock held | |
1817 | */ | |
1818 | static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg) | |
1819 | { | |
1820 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive); | |
1821 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active); | |
1822 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive); | |
1823 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready); | |
1824 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned); | |
1825 | dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued); | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * dwc2_hcd_start() - Starts the HCD when switching to Host mode | |
1830 | * | |
1831 | * @hsotg: Pointer to struct dwc2_hsotg | |
1832 | */ | |
1833 | void dwc2_hcd_start(struct dwc2_hsotg *hsotg) | |
1834 | { | |
1835 | u32 hprt0; | |
1836 | ||
1837 | if (hsotg->op_state == OTG_STATE_B_HOST) { | |
1838 | /* | |
1839 | * Reset the port. During a HNP mode switch the reset | |
1840 | * needs to occur within 1ms and have a duration of at | |
1841 | * least 50ms. | |
1842 | */ | |
1843 | hprt0 = dwc2_read_hprt0(hsotg); | |
1844 | hprt0 |= HPRT0_RST; | |
95c8bc36 | 1845 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
1846 | } |
1847 | ||
1848 | queue_delayed_work(hsotg->wq_otg, &hsotg->start_work, | |
1849 | msecs_to_jiffies(50)); | |
1850 | } | |
1851 | ||
1852 | /* Must be called with interrupt disabled and spinlock held */ | |
1853 | static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg) | |
1854 | { | |
bea8e86c | 1855 | int num_channels = hsotg->params.host_channels; |
7359d482 PZ |
1856 | struct dwc2_host_chan *channel; |
1857 | u32 hcchar; | |
1858 | int i; | |
1859 | ||
95832c00 | 1860 | if (!hsotg->params.host_dma) { |
7359d482 PZ |
1861 | /* Flush out any channel requests in slave mode */ |
1862 | for (i = 0; i < num_channels; i++) { | |
1863 | channel = hsotg->hc_ptr_array[i]; | |
1864 | if (!list_empty(&channel->hc_list_entry)) | |
1865 | continue; | |
95c8bc36 | 1866 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); |
7359d482 PZ |
1867 | if (hcchar & HCCHAR_CHENA) { |
1868 | hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR); | |
1869 | hcchar |= HCCHAR_CHDIS; | |
95c8bc36 | 1870 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(i)); |
7359d482 PZ |
1871 | } |
1872 | } | |
1873 | } | |
1874 | ||
1875 | for (i = 0; i < num_channels; i++) { | |
1876 | channel = hsotg->hc_ptr_array[i]; | |
1877 | if (!list_empty(&channel->hc_list_entry)) | |
1878 | continue; | |
95c8bc36 | 1879 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); |
7359d482 PZ |
1880 | if (hcchar & HCCHAR_CHENA) { |
1881 | /* Halt the channel */ | |
1882 | hcchar |= HCCHAR_CHDIS; | |
95c8bc36 | 1883 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(i)); |
7359d482 PZ |
1884 | } |
1885 | ||
1886 | dwc2_hc_cleanup(hsotg, channel); | |
1887 | list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list); | |
1888 | /* | |
1889 | * Added for Descriptor DMA to prevent channel double cleanup in | |
1890 | * release_channel_ddma(), which is called from ep_disable when | |
1891 | * device disconnects | |
1892 | */ | |
1893 | channel->qh = NULL; | |
1894 | } | |
7252f1bf | 1895 | /* All channels have been freed, mark them available */ |
95832c00 | 1896 | if (hsotg->params.uframe_sched) { |
7252f1bf | 1897 | hsotg->available_host_channels = |
bea8e86c | 1898 | hsotg->params.host_channels; |
7252f1bf VP |
1899 | } else { |
1900 | hsotg->non_periodic_channels = 0; | |
1901 | hsotg->periodic_channels = 0; | |
1902 | } | |
7359d482 PZ |
1903 | } |
1904 | ||
6a659531 DA |
1905 | /** |
1906 | * dwc2_hcd_connect() - Handles connect of the HCD | |
1907 | * | |
1908 | * @hsotg: Pointer to struct dwc2_hsotg | |
1909 | * | |
1910 | * Must be called with interrupt disabled and spinlock held | |
1911 | */ | |
1912 | void dwc2_hcd_connect(struct dwc2_hsotg *hsotg) | |
1913 | { | |
1914 | if (hsotg->lx_state != DWC2_L0) | |
1915 | usb_hcd_resume_root_hub(hsotg->priv); | |
1916 | ||
1917 | hsotg->flags.b.port_connect_status_change = 1; | |
1918 | hsotg->flags.b.port_connect_status = 1; | |
1919 | } | |
1920 | ||
7359d482 PZ |
1921 | /** |
1922 | * dwc2_hcd_disconnect() - Handles disconnect of the HCD | |
1923 | * | |
1924 | * @hsotg: Pointer to struct dwc2_hsotg | |
6a659531 | 1925 | * @force: If true, we won't try to reconnect even if we see device connected. |
7359d482 PZ |
1926 | * |
1927 | * Must be called with interrupt disabled and spinlock held | |
1928 | */ | |
6a659531 | 1929 | void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force) |
7359d482 PZ |
1930 | { |
1931 | u32 intr; | |
6a659531 | 1932 | u32 hprt0; |
7359d482 PZ |
1933 | |
1934 | /* Set status flags for the hub driver */ | |
1935 | hsotg->flags.b.port_connect_status_change = 1; | |
1936 | hsotg->flags.b.port_connect_status = 0; | |
1937 | ||
1938 | /* | |
1939 | * Shutdown any transfers in process by clearing the Tx FIFO Empty | |
1940 | * interrupt mask and status bits and disabling subsequent host | |
1941 | * channel interrupts. | |
1942 | */ | |
95c8bc36 | 1943 | intr = dwc2_readl(hsotg->regs + GINTMSK); |
7359d482 | 1944 | intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT); |
95c8bc36 | 1945 | dwc2_writel(intr, hsotg->regs + GINTMSK); |
7359d482 | 1946 | intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT; |
95c8bc36 | 1947 | dwc2_writel(intr, hsotg->regs + GINTSTS); |
7359d482 PZ |
1948 | |
1949 | /* | |
1950 | * Turn off the vbus power only if the core has transitioned to device | |
1951 | * mode. If still in host mode, need to keep power on to detect a | |
1952 | * reconnection. | |
1953 | */ | |
1954 | if (dwc2_is_device_mode(hsotg)) { | |
1955 | if (hsotg->op_state != OTG_STATE_A_SUSPEND) { | |
1956 | dev_dbg(hsotg->dev, "Disconnect: PortPower off\n"); | |
95c8bc36 | 1957 | dwc2_writel(0, hsotg->regs + HPRT0); |
7359d482 PZ |
1958 | } |
1959 | ||
1960 | dwc2_disable_host_interrupts(hsotg); | |
1961 | } | |
1962 | ||
1963 | /* Respond with an error status to all URBs in the schedule */ | |
1964 | dwc2_kill_all_urbs(hsotg); | |
1965 | ||
1966 | if (dwc2_is_host_mode(hsotg)) | |
1967 | /* Clean up any host channels that were in use */ | |
1968 | dwc2_hcd_cleanup_channels(hsotg); | |
1969 | ||
1970 | dwc2_host_disconnect(hsotg); | |
6a659531 DA |
1971 | |
1972 | /* | |
1973 | * Add an extra check here to see if we're actually connected but | |
1974 | * we don't have a detection interrupt pending. This can happen if: | |
1975 | * 1. hardware sees connect | |
1976 | * 2. hardware sees disconnect | |
1977 | * 3. hardware sees connect | |
1978 | * 4. dwc2_port_intr() - clears connect interrupt | |
1979 | * 5. dwc2_handle_common_intr() - calls here | |
1980 | * | |
1981 | * Without the extra check here we will end calling disconnect | |
1982 | * and won't get any future interrupts to handle the connect. | |
1983 | */ | |
1984 | if (!force) { | |
1985 | hprt0 = dwc2_readl(hsotg->regs + HPRT0); | |
1986 | if (!(hprt0 & HPRT0_CONNDET) && (hprt0 & HPRT0_CONNSTS)) | |
1987 | dwc2_hcd_connect(hsotg); | |
1988 | } | |
7359d482 PZ |
1989 | } |
1990 | ||
1991 | /** | |
1992 | * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup | |
1993 | * | |
1994 | * @hsotg: Pointer to struct dwc2_hsotg | |
1995 | */ | |
1996 | static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg) | |
1997 | { | |
1fb7f12d | 1998 | if (hsotg->bus_suspended) { |
7359d482 | 1999 | hsotg->flags.b.port_suspend_change = 1; |
b46146d5 | 2000 | usb_hcd_resume_root_hub(hsotg->priv); |
b46146d5 | 2001 | } |
1fb7f12d DA |
2002 | |
2003 | if (hsotg->lx_state == DWC2_L1) | |
2004 | hsotg->flags.b.port_l1_change = 1; | |
7359d482 PZ |
2005 | } |
2006 | ||
2007 | /** | |
2008 | * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner | |
2009 | * | |
2010 | * @hsotg: Pointer to struct dwc2_hsotg | |
2011 | * | |
2012 | * Must be called with interrupt disabled and spinlock held | |
2013 | */ | |
2014 | void dwc2_hcd_stop(struct dwc2_hsotg *hsotg) | |
2015 | { | |
2016 | dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n"); | |
2017 | ||
2018 | /* | |
2019 | * The root hub should be disconnected before this function is called. | |
2020 | * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue) | |
2021 | * and the QH lists (via ..._hcd_endpoint_disable). | |
2022 | */ | |
2023 | ||
2024 | /* Turn off all host-specific interrupts */ | |
2025 | dwc2_disable_host_interrupts(hsotg); | |
2026 | ||
2027 | /* Turn off the vbus power */ | |
2028 | dev_dbg(hsotg->dev, "PortPower off\n"); | |
95c8bc36 | 2029 | dwc2_writel(0, hsotg->regs + HPRT0); |
7359d482 PZ |
2030 | } |
2031 | ||
33ad261a | 2032 | /* Caller must hold driver lock */ |
7359d482 | 2033 | static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg, |
b58e6cee | 2034 | struct dwc2_hcd_urb *urb, struct dwc2_qh *qh, |
b5a468a6 | 2035 | struct dwc2_qtd *qtd) |
7359d482 | 2036 | { |
7359d482 PZ |
2037 | u32 intr_mask; |
2038 | int retval; | |
9f8144c6 | 2039 | int dev_speed; |
7359d482 PZ |
2040 | |
2041 | if (!hsotg->flags.b.port_connect_status) { | |
2042 | /* No longer connected */ | |
2043 | dev_err(hsotg->dev, "Not connected\n"); | |
2044 | return -ENODEV; | |
2045 | } | |
2046 | ||
9f8144c6 NH |
2047 | dev_speed = dwc2_host_get_speed(hsotg, urb->priv); |
2048 | ||
2049 | /* Some configurations cannot support LS traffic on a FS root port */ | |
2050 | if ((dev_speed == USB_SPEED_LOW) && | |
2051 | (hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) && | |
2052 | (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI)) { | |
95c8bc36 | 2053 | u32 hprt0 = dwc2_readl(hsotg->regs + HPRT0); |
9f8144c6 NH |
2054 | u32 prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
2055 | ||
2056 | if (prtspd == HPRT0_SPD_FULL_SPEED) | |
2057 | return -ENODEV; | |
2058 | } | |
2059 | ||
7359d482 | 2060 | if (!qtd) |
b5a468a6 | 2061 | return -EINVAL; |
7359d482 PZ |
2062 | |
2063 | dwc2_hcd_qtd_init(qtd, urb); | |
b58e6cee | 2064 | retval = dwc2_hcd_qtd_add(hsotg, qtd, qh); |
9bda1aac | 2065 | if (retval) { |
7359d482 PZ |
2066 | dev_err(hsotg->dev, |
2067 | "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n", | |
2068 | retval); | |
7359d482 PZ |
2069 | return retval; |
2070 | } | |
2071 | ||
95c8bc36 | 2072 | intr_mask = dwc2_readl(hsotg->regs + GINTMSK); |
9bda1aac | 2073 | if (!(intr_mask & GINTSTS_SOF)) { |
7359d482 PZ |
2074 | enum dwc2_transaction_type tr_type; |
2075 | ||
2076 | if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK && | |
2077 | !(qtd->urb->flags & URB_GIVEBACK_ASAP)) | |
2078 | /* | |
2079 | * Do not schedule SG transactions until qtd has | |
2080 | * URB_GIVEBACK_ASAP set | |
2081 | */ | |
2082 | return 0; | |
2083 | ||
7359d482 PZ |
2084 | tr_type = dwc2_hcd_select_transactions(hsotg); |
2085 | if (tr_type != DWC2_TRANSACTION_NONE) | |
2086 | dwc2_hcd_queue_transactions(hsotg, tr_type); | |
7359d482 PZ |
2087 | } |
2088 | ||
9bda1aac | 2089 | return 0; |
7359d482 PZ |
2090 | } |
2091 | ||
2092 | /* Must be called with interrupt disabled and spinlock held */ | |
2093 | static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg, | |
2094 | struct dwc2_hcd_urb *urb) | |
2095 | { | |
2096 | struct dwc2_qh *qh; | |
2097 | struct dwc2_qtd *urb_qtd; | |
2098 | ||
2099 | urb_qtd = urb->qtd; | |
2100 | if (!urb_qtd) { | |
2101 | dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n"); | |
2102 | return -EINVAL; | |
2103 | } | |
2104 | ||
2105 | qh = urb_qtd->qh; | |
2106 | if (!qh) { | |
2107 | dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n"); | |
2108 | return -EINVAL; | |
2109 | } | |
2110 | ||
0d012b98 PZ |
2111 | urb->priv = NULL; |
2112 | ||
7359d482 PZ |
2113 | if (urb_qtd->in_process && qh->channel) { |
2114 | dwc2_dump_channel_info(hsotg, qh->channel); | |
2115 | ||
2116 | /* The QTD is in process (it has been assigned to a channel) */ | |
2117 | if (hsotg->flags.b.port_connect_status) | |
2118 | /* | |
2119 | * If still connected (i.e. in host mode), halt the | |
2120 | * channel so it can be used for other transfers. If | |
2121 | * no longer connected, the host registers can't be | |
2122 | * written to halt the channel since the core is in | |
2123 | * device mode. | |
2124 | */ | |
2125 | dwc2_hc_halt(hsotg, qh->channel, | |
2126 | DWC2_HC_XFER_URB_DEQUEUE); | |
2127 | } | |
2128 | ||
2129 | /* | |
2130 | * Free the QTD and clean up the associated QH. Leave the QH in the | |
2131 | * schedule if it has any remaining QTDs. | |
2132 | */ | |
95832c00 | 2133 | if (!hsotg->params.dma_desc_enable) { |
7359d482 PZ |
2134 | u8 in_process = urb_qtd->in_process; |
2135 | ||
2136 | dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); | |
2137 | if (in_process) { | |
2138 | dwc2_hcd_qh_deactivate(hsotg, qh, 0); | |
2139 | qh->channel = NULL; | |
2140 | } else if (list_empty(&qh->qtd_list)) { | |
2141 | dwc2_hcd_qh_unlink(hsotg, qh); | |
2142 | } | |
2143 | } else { | |
2144 | dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh); | |
2145 | } | |
2146 | ||
2147 | return 0; | |
2148 | } | |
2149 | ||
2150 | /* Must NOT be called with interrupt disabled or spinlock held */ | |
2151 | static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg, | |
2152 | struct usb_host_endpoint *ep, int retry) | |
2153 | { | |
2154 | struct dwc2_qtd *qtd, *qtd_tmp; | |
2155 | struct dwc2_qh *qh; | |
2156 | unsigned long flags; | |
2157 | int rc; | |
2158 | ||
2159 | spin_lock_irqsave(&hsotg->lock, flags); | |
2160 | ||
2161 | qh = ep->hcpriv; | |
2162 | if (!qh) { | |
2163 | rc = -EINVAL; | |
2164 | goto err; | |
2165 | } | |
2166 | ||
2167 | while (!list_empty(&qh->qtd_list) && retry--) { | |
2168 | if (retry == 0) { | |
2169 | dev_err(hsotg->dev, | |
2170 | "## timeout in dwc2_hcd_endpoint_disable() ##\n"); | |
2171 | rc = -EBUSY; | |
2172 | goto err; | |
2173 | } | |
2174 | ||
2175 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
04a9db79 | 2176 | msleep(20); |
7359d482 PZ |
2177 | spin_lock_irqsave(&hsotg->lock, flags); |
2178 | qh = ep->hcpriv; | |
2179 | if (!qh) { | |
2180 | rc = -EINVAL; | |
2181 | goto err; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | dwc2_hcd_qh_unlink(hsotg, qh); | |
2186 | ||
2187 | /* Free each QTD in the QH's QTD list */ | |
2188 | list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) | |
2189 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
2190 | ||
2191 | ep->hcpriv = NULL; | |
16e80218 DA |
2192 | |
2193 | if (qh->channel && qh->channel->qh == qh) | |
2194 | qh->channel->qh = NULL; | |
2195 | ||
7359d482 | 2196 | spin_unlock_irqrestore(&hsotg->lock, flags); |
16e80218 | 2197 | |
7359d482 PZ |
2198 | dwc2_hcd_qh_free(hsotg, qh); |
2199 | ||
2200 | return 0; | |
2201 | ||
2202 | err: | |
2203 | ep->hcpriv = NULL; | |
2204 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
2205 | ||
2206 | return rc; | |
2207 | } | |
2208 | ||
2209 | /* Must be called with interrupt disabled and spinlock held */ | |
2210 | static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg, | |
2211 | struct usb_host_endpoint *ep) | |
2212 | { | |
2213 | struct dwc2_qh *qh = ep->hcpriv; | |
2214 | ||
2215 | if (!qh) | |
2216 | return -EINVAL; | |
2217 | ||
2218 | qh->data_toggle = DWC2_HC_PID_DATA0; | |
2219 | ||
2220 | return 0; | |
2221 | } | |
2222 | ||
b02038fa JY |
2223 | /** |
2224 | * dwc2_core_init() - Initializes the DWC_otg controller registers and | |
2225 | * prepares the core for device mode or host mode operation | |
2226 | * | |
2227 | * @hsotg: Programming view of the DWC_otg controller | |
2228 | * @initial_setup: If true then this is the first init for this instance. | |
2229 | */ | |
2230 | static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup) | |
2231 | { | |
2232 | u32 usbcfg, otgctl; | |
2233 | int retval; | |
2234 | ||
2235 | dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); | |
2236 | ||
2237 | usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); | |
2238 | ||
2239 | /* Set ULPI External VBUS bit if needed */ | |
2240 | usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV; | |
95832c00 | 2241 | if (hsotg->params.phy_ulpi_ext_vbus) |
b02038fa JY |
2242 | usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV; |
2243 | ||
2244 | /* Set external TS Dline pulsing bit if needed */ | |
2245 | usbcfg &= ~GUSBCFG_TERMSELDLPULSE; | |
95832c00 | 2246 | if (hsotg->params.ts_dline) |
b02038fa JY |
2247 | usbcfg |= GUSBCFG_TERMSELDLPULSE; |
2248 | ||
2249 | dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); | |
2250 | ||
2251 | /* | |
2252 | * Reset the Controller | |
2253 | * | |
2254 | * We only need to reset the controller if this is a re-init. | |
2255 | * For the first init we know for sure that earlier code reset us (it | |
2256 | * needed to in order to properly detect various parameters). | |
2257 | */ | |
2258 | if (!initial_setup) { | |
2259 | retval = dwc2_core_reset_and_force_dr_mode(hsotg); | |
2260 | if (retval) { | |
2261 | dev_err(hsotg->dev, "%s(): Reset failed, aborting\n", | |
2262 | __func__); | |
2263 | return retval; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * This needs to happen in FS mode before any other programming occurs | |
2269 | */ | |
2270 | retval = dwc2_phy_init(hsotg, initial_setup); | |
2271 | if (retval) | |
2272 | return retval; | |
2273 | ||
2274 | /* Program the GAHBCFG Register */ | |
2275 | retval = dwc2_gahbcfg_init(hsotg); | |
2276 | if (retval) | |
2277 | return retval; | |
2278 | ||
2279 | /* Program the GUSBCFG register */ | |
2280 | dwc2_gusbcfg_init(hsotg); | |
2281 | ||
2282 | /* Program the GOTGCTL register */ | |
2283 | otgctl = dwc2_readl(hsotg->regs + GOTGCTL); | |
2284 | otgctl &= ~GOTGCTL_OTGVER; | |
b02038fa | 2285 | dwc2_writel(otgctl, hsotg->regs + GOTGCTL); |
b02038fa JY |
2286 | |
2287 | /* Clear the SRP success bit for FS-I2c */ | |
2288 | hsotg->srp_success = 0; | |
2289 | ||
2290 | /* Enable common interrupts */ | |
2291 | dwc2_enable_common_interrupts(hsotg); | |
2292 | ||
2293 | /* | |
2294 | * Do device or host initialization based on mode during PCD and | |
2295 | * HCD initialization | |
2296 | */ | |
2297 | if (dwc2_is_host_mode(hsotg)) { | |
2298 | dev_dbg(hsotg->dev, "Host Mode\n"); | |
2299 | hsotg->op_state = OTG_STATE_A_HOST; | |
2300 | } else { | |
2301 | dev_dbg(hsotg->dev, "Device Mode\n"); | |
2302 | hsotg->op_state = OTG_STATE_B_PERIPHERAL; | |
2303 | } | |
2304 | ||
2305 | return 0; | |
2306 | } | |
2307 | ||
2308 | /** | |
2309 | * dwc2_core_host_init() - Initializes the DWC_otg controller registers for | |
2310 | * Host mode | |
2311 | * | |
2312 | * @hsotg: Programming view of DWC_otg controller | |
2313 | * | |
2314 | * This function flushes the Tx and Rx FIFOs and flushes any entries in the | |
2315 | * request queues. Host channels are reset to ensure that they are ready for | |
2316 | * performing transfers. | |
2317 | */ | |
2318 | static void dwc2_core_host_init(struct dwc2_hsotg *hsotg) | |
2319 | { | |
2320 | u32 hcfg, hfir, otgctl; | |
2321 | ||
2322 | dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); | |
2323 | ||
2324 | /* Restart the Phy Clock */ | |
2325 | dwc2_writel(0, hsotg->regs + PCGCTL); | |
2326 | ||
2327 | /* Initialize Host Configuration Register */ | |
2328 | dwc2_init_fs_ls_pclk_sel(hsotg); | |
38e9002b VM |
2329 | if (hsotg->params.speed == DWC2_SPEED_PARAM_FULL || |
2330 | hsotg->params.speed == DWC2_SPEED_PARAM_LOW) { | |
b02038fa JY |
2331 | hcfg = dwc2_readl(hsotg->regs + HCFG); |
2332 | hcfg |= HCFG_FSLSSUPP; | |
2333 | dwc2_writel(hcfg, hsotg->regs + HCFG); | |
2334 | } | |
2335 | ||
2336 | /* | |
2337 | * This bit allows dynamic reloading of the HFIR register during | |
2338 | * runtime. This bit needs to be programmed during initial configuration | |
2339 | * and its value must not be changed during runtime. | |
2340 | */ | |
95832c00 | 2341 | if (hsotg->params.reload_ctl) { |
b02038fa JY |
2342 | hfir = dwc2_readl(hsotg->regs + HFIR); |
2343 | hfir |= HFIR_RLDCTRL; | |
2344 | dwc2_writel(hfir, hsotg->regs + HFIR); | |
2345 | } | |
2346 | ||
95832c00 | 2347 | if (hsotg->params.dma_desc_enable) { |
b02038fa JY |
2348 | u32 op_mode = hsotg->hw_params.op_mode; |
2349 | ||
2350 | if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a || | |
2351 | !hsotg->hw_params.dma_desc_enable || | |
2352 | op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE || | |
2353 | op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE || | |
2354 | op_mode == GHWCFG2_OP_MODE_UNDEFINED) { | |
2355 | dev_err(hsotg->dev, | |
2356 | "Hardware does not support descriptor DMA mode -\n"); | |
2357 | dev_err(hsotg->dev, | |
2358 | "falling back to buffer DMA mode.\n"); | |
95832c00 | 2359 | hsotg->params.dma_desc_enable = false; |
b02038fa JY |
2360 | } else { |
2361 | hcfg = dwc2_readl(hsotg->regs + HCFG); | |
2362 | hcfg |= HCFG_DESCDMA; | |
2363 | dwc2_writel(hcfg, hsotg->regs + HCFG); | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | /* Configure data FIFO sizes */ | |
2368 | dwc2_config_fifos(hsotg); | |
2369 | ||
2370 | /* TODO - check this */ | |
2371 | /* Clear Host Set HNP Enable in the OTG Control Register */ | |
2372 | otgctl = dwc2_readl(hsotg->regs + GOTGCTL); | |
2373 | otgctl &= ~GOTGCTL_HSTSETHNPEN; | |
2374 | dwc2_writel(otgctl, hsotg->regs + GOTGCTL); | |
2375 | ||
2376 | /* Make sure the FIFOs are flushed */ | |
2377 | dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */); | |
2378 | dwc2_flush_rx_fifo(hsotg); | |
2379 | ||
2380 | /* Clear Host Set HNP Enable in the OTG Control Register */ | |
2381 | otgctl = dwc2_readl(hsotg->regs + GOTGCTL); | |
2382 | otgctl &= ~GOTGCTL_HSTSETHNPEN; | |
2383 | dwc2_writel(otgctl, hsotg->regs + GOTGCTL); | |
2384 | ||
95832c00 | 2385 | if (!hsotg->params.dma_desc_enable) { |
b02038fa JY |
2386 | int num_channels, i; |
2387 | u32 hcchar; | |
2388 | ||
2389 | /* Flush out any leftover queued requests */ | |
bea8e86c | 2390 | num_channels = hsotg->params.host_channels; |
b02038fa JY |
2391 | for (i = 0; i < num_channels; i++) { |
2392 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); | |
2393 | hcchar &= ~HCCHAR_CHENA; | |
2394 | hcchar |= HCCHAR_CHDIS; | |
2395 | hcchar &= ~HCCHAR_EPDIR; | |
2396 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(i)); | |
2397 | } | |
2398 | ||
2399 | /* Halt all channels to put them into a known state */ | |
2400 | for (i = 0; i < num_channels; i++) { | |
2401 | int count = 0; | |
2402 | ||
2403 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); | |
2404 | hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS; | |
2405 | hcchar &= ~HCCHAR_EPDIR; | |
2406 | dwc2_writel(hcchar, hsotg->regs + HCCHAR(i)); | |
2407 | dev_dbg(hsotg->dev, "%s: Halt channel %d\n", | |
2408 | __func__, i); | |
2409 | do { | |
2410 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); | |
2411 | if (++count > 1000) { | |
2412 | dev_err(hsotg->dev, | |
2413 | "Unable to clear enable on channel %d\n", | |
2414 | i); | |
2415 | break; | |
2416 | } | |
2417 | udelay(1); | |
2418 | } while (hcchar & HCCHAR_CHENA); | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | /* Turn on the vbus power */ | |
2423 | dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state); | |
2424 | if (hsotg->op_state == OTG_STATE_A_HOST) { | |
2425 | u32 hprt0 = dwc2_read_hprt0(hsotg); | |
2426 | ||
2427 | dev_dbg(hsotg->dev, "Init: Power Port (%d)\n", | |
2428 | !!(hprt0 & HPRT0_PWR)); | |
2429 | if (!(hprt0 & HPRT0_PWR)) { | |
2430 | hprt0 |= HPRT0_PWR; | |
2431 | dwc2_writel(hprt0, hsotg->regs + HPRT0); | |
2432 | } | |
2433 | } | |
2434 | ||
2435 | dwc2_enable_host_interrupts(hsotg); | |
2436 | } | |
2437 | ||
7359d482 PZ |
2438 | /* |
2439 | * Initializes dynamic portions of the DWC_otg HCD state | |
2440 | * | |
2441 | * Must be called with interrupt disabled and spinlock held | |
2442 | */ | |
2443 | static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg) | |
2444 | { | |
2445 | struct dwc2_host_chan *chan, *chan_tmp; | |
2446 | int num_channels; | |
2447 | int i; | |
2448 | ||
2449 | hsotg->flags.d32 = 0; | |
7359d482 | 2450 | hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active; |
20f2eb9c | 2451 | |
95832c00 | 2452 | if (hsotg->params.uframe_sched) { |
20f2eb9c | 2453 | hsotg->available_host_channels = |
bea8e86c | 2454 | hsotg->params.host_channels; |
20f2eb9c DC |
2455 | } else { |
2456 | hsotg->non_periodic_channels = 0; | |
2457 | hsotg->periodic_channels = 0; | |
2458 | } | |
7359d482 PZ |
2459 | |
2460 | /* | |
2461 | * Put all channels in the free channel list and clean up channel | |
2462 | * states | |
2463 | */ | |
2464 | list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list, | |
2465 | hc_list_entry) | |
2466 | list_del_init(&chan->hc_list_entry); | |
2467 | ||
bea8e86c | 2468 | num_channels = hsotg->params.host_channels; |
7359d482 PZ |
2469 | for (i = 0; i < num_channels; i++) { |
2470 | chan = hsotg->hc_ptr_array[i]; | |
2471 | list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list); | |
2472 | dwc2_hc_cleanup(hsotg, chan); | |
2473 | } | |
2474 | ||
2475 | /* Initialize the DWC core for host mode operation */ | |
2476 | dwc2_core_host_init(hsotg); | |
2477 | } | |
2478 | ||
2479 | static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg, | |
2480 | struct dwc2_host_chan *chan, | |
2481 | struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) | |
2482 | { | |
2483 | int hub_addr, hub_port; | |
2484 | ||
2485 | chan->do_split = 1; | |
2486 | chan->xact_pos = qtd->isoc_split_pos; | |
2487 | chan->complete_split = qtd->complete_split; | |
2488 | dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port); | |
2489 | chan->hub_addr = (u8)hub_addr; | |
2490 | chan->hub_port = (u8)hub_port; | |
2491 | } | |
2492 | ||
3bc04e28 DA |
2493 | static void dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg, |
2494 | struct dwc2_host_chan *chan, | |
2495 | struct dwc2_qtd *qtd) | |
7359d482 PZ |
2496 | { |
2497 | struct dwc2_hcd_urb *urb = qtd->urb; | |
2498 | struct dwc2_hcd_iso_packet_desc *frame_desc; | |
2499 | ||
2500 | switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) { | |
2501 | case USB_ENDPOINT_XFER_CONTROL: | |
2502 | chan->ep_type = USB_ENDPOINT_XFER_CONTROL; | |
2503 | ||
2504 | switch (qtd->control_phase) { | |
2505 | case DWC2_CONTROL_SETUP: | |
2506 | dev_vdbg(hsotg->dev, " Control setup transaction\n"); | |
2507 | chan->do_ping = 0; | |
2508 | chan->ep_is_in = 0; | |
2509 | chan->data_pid_start = DWC2_HC_PID_SETUP; | |
95832c00 | 2510 | if (hsotg->params.host_dma) |
7359d482 PZ |
2511 | chan->xfer_dma = urb->setup_dma; |
2512 | else | |
2513 | chan->xfer_buf = urb->setup_packet; | |
2514 | chan->xfer_len = 8; | |
7359d482 PZ |
2515 | break; |
2516 | ||
2517 | case DWC2_CONTROL_DATA: | |
2518 | dev_vdbg(hsotg->dev, " Control data transaction\n"); | |
2519 | chan->data_pid_start = qtd->data_toggle; | |
2520 | break; | |
2521 | ||
2522 | case DWC2_CONTROL_STATUS: | |
2523 | /* | |
2524 | * Direction is opposite of data direction or IN if no | |
2525 | * data | |
2526 | */ | |
2527 | dev_vdbg(hsotg->dev, " Control status transaction\n"); | |
2528 | if (urb->length == 0) | |
2529 | chan->ep_is_in = 1; | |
2530 | else | |
2531 | chan->ep_is_in = | |
2532 | dwc2_hcd_is_pipe_out(&urb->pipe_info); | |
2533 | if (chan->ep_is_in) | |
2534 | chan->do_ping = 0; | |
2535 | chan->data_pid_start = DWC2_HC_PID_DATA1; | |
2536 | chan->xfer_len = 0; | |
95832c00 | 2537 | if (hsotg->params.host_dma) |
7359d482 PZ |
2538 | chan->xfer_dma = hsotg->status_buf_dma; |
2539 | else | |
2540 | chan->xfer_buf = hsotg->status_buf; | |
7359d482 PZ |
2541 | break; |
2542 | } | |
2543 | break; | |
2544 | ||
2545 | case USB_ENDPOINT_XFER_BULK: | |
2546 | chan->ep_type = USB_ENDPOINT_XFER_BULK; | |
2547 | break; | |
2548 | ||
2549 | case USB_ENDPOINT_XFER_INT: | |
2550 | chan->ep_type = USB_ENDPOINT_XFER_INT; | |
2551 | break; | |
2552 | ||
2553 | case USB_ENDPOINT_XFER_ISOC: | |
2554 | chan->ep_type = USB_ENDPOINT_XFER_ISOC; | |
95832c00 | 2555 | if (hsotg->params.dma_desc_enable) |
7359d482 PZ |
2556 | break; |
2557 | ||
2558 | frame_desc = &urb->iso_descs[qtd->isoc_frame_index]; | |
2559 | frame_desc->status = 0; | |
2560 | ||
95832c00 | 2561 | if (hsotg->params.host_dma) { |
7359d482 PZ |
2562 | chan->xfer_dma = urb->dma; |
2563 | chan->xfer_dma += frame_desc->offset + | |
2564 | qtd->isoc_split_offset; | |
2565 | } else { | |
2566 | chan->xfer_buf = urb->buf; | |
2567 | chan->xfer_buf += frame_desc->offset + | |
2568 | qtd->isoc_split_offset; | |
2569 | } | |
2570 | ||
2571 | chan->xfer_len = frame_desc->length - qtd->isoc_split_offset; | |
2572 | ||
7359d482 PZ |
2573 | if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) { |
2574 | if (chan->xfer_len <= 188) | |
2575 | chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL; | |
2576 | else | |
2577 | chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN; | |
2578 | } | |
2579 | break; | |
2580 | } | |
3bc04e28 DA |
2581 | } |
2582 | ||
2583 | #define DWC2_USB_DMA_ALIGN 4 | |
2584 | ||
2585 | struct dma_aligned_buffer { | |
2586 | void *kmalloc_ptr; | |
2587 | void *old_xfer_buffer; | |
2588 | u8 data[0]; | |
2589 | }; | |
2590 | ||
2591 | static void dwc2_free_dma_aligned_buffer(struct urb *urb) | |
2592 | { | |
2593 | struct dma_aligned_buffer *temp; | |
2594 | ||
2595 | if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER)) | |
2596 | return; | |
7359d482 | 2597 | |
3bc04e28 | 2598 | temp = container_of(urb->transfer_buffer, |
9da51974 | 2599 | struct dma_aligned_buffer, data); |
3bc04e28 DA |
2600 | |
2601 | if (usb_urb_dir_in(urb)) | |
2602 | memcpy(temp->old_xfer_buffer, temp->data, | |
2603 | urb->transfer_buffer_length); | |
2604 | urb->transfer_buffer = temp->old_xfer_buffer; | |
2605 | kfree(temp->kmalloc_ptr); | |
2606 | ||
2607 | urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER; | |
7359d482 PZ |
2608 | } |
2609 | ||
3bc04e28 | 2610 | static int dwc2_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags) |
7359d482 | 2611 | { |
3bc04e28 DA |
2612 | struct dma_aligned_buffer *temp, *kmalloc_ptr; |
2613 | size_t kmalloc_size; | |
7359d482 | 2614 | |
3bc04e28 DA |
2615 | if (urb->num_sgs || urb->sg || |
2616 | urb->transfer_buffer_length == 0 || | |
2617 | !((uintptr_t)urb->transfer_buffer & (DWC2_USB_DMA_ALIGN - 1))) | |
2618 | return 0; | |
5dce9555 | 2619 | |
3bc04e28 DA |
2620 | /* Allocate a buffer with enough padding for alignment */ |
2621 | kmalloc_size = urb->transfer_buffer_length + | |
2622 | sizeof(struct dma_aligned_buffer) + DWC2_USB_DMA_ALIGN - 1; | |
7359d482 | 2623 | |
3bc04e28 DA |
2624 | kmalloc_ptr = kmalloc(kmalloc_size, mem_flags); |
2625 | if (!kmalloc_ptr) | |
2626 | return -ENOMEM; | |
5dce9555 | 2627 | |
3bc04e28 DA |
2628 | /* Position our struct dma_aligned_buffer such that data is aligned */ |
2629 | temp = PTR_ALIGN(kmalloc_ptr + 1, DWC2_USB_DMA_ALIGN) - 1; | |
2630 | temp->kmalloc_ptr = kmalloc_ptr; | |
2631 | temp->old_xfer_buffer = urb->transfer_buffer; | |
2632 | if (usb_urb_dir_out(urb)) | |
2633 | memcpy(temp->data, urb->transfer_buffer, | |
2634 | urb->transfer_buffer_length); | |
2635 | urb->transfer_buffer = temp->data; | |
7359d482 | 2636 | |
3bc04e28 | 2637 | urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER; |
db62b9a8 | 2638 | |
7359d482 PZ |
2639 | return 0; |
2640 | } | |
2641 | ||
3bc04e28 | 2642 | static int dwc2_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
9da51974 | 2643 | gfp_t mem_flags) |
3bc04e28 DA |
2644 | { |
2645 | int ret; | |
2646 | ||
2647 | /* We assume setup_dma is always aligned; warn if not */ | |
2648 | WARN_ON_ONCE(urb->setup_dma && | |
2649 | (urb->setup_dma & (DWC2_USB_DMA_ALIGN - 1))); | |
2650 | ||
2651 | ret = dwc2_alloc_dma_aligned_buffer(urb, mem_flags); | |
2652 | if (ret) | |
2653 | return ret; | |
2654 | ||
2655 | ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
2656 | if (ret) | |
2657 | dwc2_free_dma_aligned_buffer(urb); | |
2658 | ||
2659 | return ret; | |
2660 | } | |
2661 | ||
2662 | static void dwc2_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) | |
2663 | { | |
2664 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
2665 | dwc2_free_dma_aligned_buffer(urb); | |
2666 | } | |
2667 | ||
7359d482 PZ |
2668 | /** |
2669 | * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host | |
2670 | * channel and initializes the host channel to perform the transactions. The | |
2671 | * host channel is removed from the free list. | |
2672 | * | |
2673 | * @hsotg: The HCD state structure | |
2674 | * @qh: Transactions from the first QTD for this QH are selected and assigned | |
2675 | * to a free host channel | |
2676 | */ | |
20f2eb9c | 2677 | static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
7359d482 PZ |
2678 | { |
2679 | struct dwc2_host_chan *chan; | |
2680 | struct dwc2_hcd_urb *urb; | |
2681 | struct dwc2_qtd *qtd; | |
7359d482 | 2682 | |
b49977a6 MK |
2683 | if (dbg_qh(qh)) |
2684 | dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh); | |
7359d482 PZ |
2685 | |
2686 | if (list_empty(&qh->qtd_list)) { | |
2687 | dev_dbg(hsotg->dev, "No QTDs in QH list\n"); | |
20f2eb9c | 2688 | return -ENOMEM; |
7359d482 PZ |
2689 | } |
2690 | ||
2691 | if (list_empty(&hsotg->free_hc_list)) { | |
2692 | dev_dbg(hsotg->dev, "No free channel to assign\n"); | |
20f2eb9c | 2693 | return -ENOMEM; |
7359d482 PZ |
2694 | } |
2695 | ||
2696 | chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan, | |
2697 | hc_list_entry); | |
2698 | ||
20f2eb9c | 2699 | /* Remove host channel from free list */ |
7359d482 PZ |
2700 | list_del_init(&chan->hc_list_entry); |
2701 | ||
2702 | qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry); | |
2703 | urb = qtd->urb; | |
2704 | qh->channel = chan; | |
2705 | qtd->in_process = 1; | |
2706 | ||
2707 | /* | |
2708 | * Use usb_pipedevice to determine device address. This address is | |
2709 | * 0 before the SET_ADDRESS command and the correct address afterward. | |
2710 | */ | |
2711 | chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info); | |
2712 | chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info); | |
2713 | chan->speed = qh->dev_speed; | |
2714 | chan->max_packet = dwc2_max_packet(qh->maxp); | |
2715 | ||
2716 | chan->xfer_started = 0; | |
2717 | chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS; | |
2718 | chan->error_state = (qtd->error_count > 0); | |
2719 | chan->halt_on_queue = 0; | |
2720 | chan->halt_pending = 0; | |
2721 | chan->requests = 0; | |
2722 | ||
2723 | /* | |
2724 | * The following values may be modified in the transfer type section | |
2725 | * below. The xfer_len value may be reduced when the transfer is | |
2726 | * started to accommodate the max widths of the XferSize and PktCnt | |
2727 | * fields in the HCTSIZn register. | |
2728 | */ | |
2729 | ||
2730 | chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0); | |
2731 | if (chan->ep_is_in) | |
2732 | chan->do_ping = 0; | |
2733 | else | |
2734 | chan->do_ping = qh->ping_state; | |
2735 | ||
2736 | chan->data_pid_start = qh->data_toggle; | |
2737 | chan->multi_count = 1; | |
2738 | ||
bb6c3422 | 2739 | if (urb->actual_length > urb->length && |
9da51974 | 2740 | !dwc2_hcd_is_pipe_in(&urb->pipe_info)) |
84181086 PZ |
2741 | urb->actual_length = urb->length; |
2742 | ||
95832c00 | 2743 | if (hsotg->params.host_dma) |
7359d482 | 2744 | chan->xfer_dma = urb->dma + urb->actual_length; |
3bc04e28 | 2745 | else |
7359d482 | 2746 | chan->xfer_buf = (u8 *)urb->buf + urb->actual_length; |
7359d482 PZ |
2747 | |
2748 | chan->xfer_len = urb->length - urb->actual_length; | |
2749 | chan->xfer_count = 0; | |
2750 | ||
2751 | /* Set the split attributes if required */ | |
2752 | if (qh->do_split) | |
2753 | dwc2_hc_init_split(hsotg, chan, qtd, urb); | |
2754 | else | |
2755 | chan->do_split = 0; | |
2756 | ||
2757 | /* Set the transfer attributes */ | |
3bc04e28 | 2758 | dwc2_hc_init_xfer(hsotg, chan, qtd); |
7359d482 PZ |
2759 | |
2760 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
2761 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) | |
2762 | /* | |
2763 | * This value may be modified when the transfer is started | |
2764 | * to reflect the actual transfer length | |
2765 | */ | |
2766 | chan->multi_count = dwc2_hb_mult(qh->maxp); | |
2767 | ||
95832c00 | 2768 | if (hsotg->params.dma_desc_enable) { |
7359d482 | 2769 | chan->desc_list_addr = qh->desc_list_dma; |
95105a99 GH |
2770 | chan->desc_list_sz = qh->desc_list_sz; |
2771 | } | |
7359d482 PZ |
2772 | |
2773 | dwc2_hc_init(hsotg, chan); | |
2774 | chan->qh = qh; | |
20f2eb9c DC |
2775 | |
2776 | return 0; | |
7359d482 PZ |
2777 | } |
2778 | ||
2779 | /** | |
2780 | * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer | |
2781 | * schedule and assigns them to available host channels. Called from the HCD | |
2782 | * interrupt handler functions. | |
2783 | * | |
2784 | * @hsotg: The HCD state structure | |
2785 | * | |
2786 | * Return: The types of new transactions that were assigned to host channels | |
2787 | */ | |
2788 | enum dwc2_transaction_type dwc2_hcd_select_transactions( | |
2789 | struct dwc2_hsotg *hsotg) | |
2790 | { | |
2791 | enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE; | |
2792 | struct list_head *qh_ptr; | |
2793 | struct dwc2_qh *qh; | |
2794 | int num_channels; | |
2795 | ||
2796 | #ifdef DWC2_DEBUG_SOF | |
2797 | dev_vdbg(hsotg->dev, " Select Transactions\n"); | |
2798 | #endif | |
2799 | ||
2800 | /* Process entries in the periodic ready list */ | |
2801 | qh_ptr = hsotg->periodic_sched_ready.next; | |
2802 | while (qh_ptr != &hsotg->periodic_sched_ready) { | |
2803 | if (list_empty(&hsotg->free_hc_list)) | |
2804 | break; | |
95832c00 | 2805 | if (hsotg->params.uframe_sched) { |
20f2eb9c DC |
2806 | if (hsotg->available_host_channels <= 1) |
2807 | break; | |
2808 | hsotg->available_host_channels--; | |
2809 | } | |
7359d482 | 2810 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); |
20f2eb9c DC |
2811 | if (dwc2_assign_and_init_hc(hsotg, qh)) |
2812 | break; | |
7359d482 PZ |
2813 | |
2814 | /* | |
2815 | * Move the QH from the periodic ready schedule to the | |
2816 | * periodic assigned schedule | |
2817 | */ | |
2818 | qh_ptr = qh_ptr->next; | |
94ef7aee DA |
2819 | list_move_tail(&qh->qh_list_entry, |
2820 | &hsotg->periodic_sched_assigned); | |
7359d482 PZ |
2821 | ret_val = DWC2_TRANSACTION_PERIODIC; |
2822 | } | |
2823 | ||
2824 | /* | |
2825 | * Process entries in the inactive portion of the non-periodic | |
2826 | * schedule. Some free host channels may not be used if they are | |
2827 | * reserved for periodic transfers. | |
2828 | */ | |
bea8e86c | 2829 | num_channels = hsotg->params.host_channels; |
7359d482 PZ |
2830 | qh_ptr = hsotg->non_periodic_sched_inactive.next; |
2831 | while (qh_ptr != &hsotg->non_periodic_sched_inactive) { | |
95832c00 | 2832 | if (!hsotg->params.uframe_sched && |
20f2eb9c | 2833 | hsotg->non_periodic_channels >= num_channels - |
7359d482 PZ |
2834 | hsotg->periodic_channels) |
2835 | break; | |
2836 | if (list_empty(&hsotg->free_hc_list)) | |
2837 | break; | |
2838 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); | |
95832c00 | 2839 | if (hsotg->params.uframe_sched) { |
20f2eb9c DC |
2840 | if (hsotg->available_host_channels < 1) |
2841 | break; | |
2842 | hsotg->available_host_channels--; | |
2843 | } | |
2844 | ||
2845 | if (dwc2_assign_and_init_hc(hsotg, qh)) | |
2846 | break; | |
7359d482 PZ |
2847 | |
2848 | /* | |
2849 | * Move the QH from the non-periodic inactive schedule to the | |
2850 | * non-periodic active schedule | |
2851 | */ | |
2852 | qh_ptr = qh_ptr->next; | |
94ef7aee DA |
2853 | list_move_tail(&qh->qh_list_entry, |
2854 | &hsotg->non_periodic_sched_active); | |
7359d482 PZ |
2855 | |
2856 | if (ret_val == DWC2_TRANSACTION_NONE) | |
2857 | ret_val = DWC2_TRANSACTION_NON_PERIODIC; | |
2858 | else | |
2859 | ret_val = DWC2_TRANSACTION_ALL; | |
2860 | ||
95832c00 | 2861 | if (!hsotg->params.uframe_sched) |
20f2eb9c | 2862 | hsotg->non_periodic_channels++; |
7359d482 PZ |
2863 | } |
2864 | ||
2865 | return ret_val; | |
2866 | } | |
2867 | ||
2868 | /** | |
2869 | * dwc2_queue_transaction() - Attempts to queue a single transaction request for | |
2870 | * a host channel associated with either a periodic or non-periodic transfer | |
2871 | * | |
2872 | * @hsotg: The HCD state structure | |
2873 | * @chan: Host channel descriptor associated with either a periodic or | |
2874 | * non-periodic transfer | |
2875 | * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO | |
2876 | * for periodic transfers or the non-periodic Tx FIFO | |
2877 | * for non-periodic transfers | |
2878 | * | |
2879 | * Return: 1 if a request is queued and more requests may be needed to | |
2880 | * complete the transfer, 0 if no more requests are required for this | |
2881 | * transfer, -1 if there is insufficient space in the Tx FIFO | |
2882 | * | |
2883 | * This function assumes that there is space available in the appropriate | |
2884 | * request queue. For an OUT transfer or SETUP transaction in Slave mode, | |
2885 | * it checks whether space is available in the appropriate Tx FIFO. | |
2886 | * | |
2887 | * Must be called with interrupt disabled and spinlock held | |
2888 | */ | |
2889 | static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg, | |
2890 | struct dwc2_host_chan *chan, | |
2891 | u16 fifo_dwords_avail) | |
2892 | { | |
2893 | int retval = 0; | |
2894 | ||
c9c8ac01 DA |
2895 | if (chan->do_split) |
2896 | /* Put ourselves on the list to keep order straight */ | |
2897 | list_move_tail(&chan->split_order_list_entry, | |
2898 | &hsotg->split_order); | |
2899 | ||
95832c00 JY |
2900 | if (hsotg->params.host_dma) { |
2901 | if (hsotg->params.dma_desc_enable) { | |
7359d482 PZ |
2902 | if (!chan->xfer_started || |
2903 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
2904 | dwc2_hcd_start_xfer_ddma(hsotg, chan->qh); | |
2905 | chan->qh->ping_state = 0; | |
2906 | } | |
2907 | } else if (!chan->xfer_started) { | |
2908 | dwc2_hc_start_transfer(hsotg, chan); | |
2909 | chan->qh->ping_state = 0; | |
2910 | } | |
2911 | } else if (chan->halt_pending) { | |
2912 | /* Don't queue a request if the channel has been halted */ | |
2913 | } else if (chan->halt_on_queue) { | |
2914 | dwc2_hc_halt(hsotg, chan, chan->halt_status); | |
2915 | } else if (chan->do_ping) { | |
2916 | if (!chan->xfer_started) | |
2917 | dwc2_hc_start_transfer(hsotg, chan); | |
2918 | } else if (!chan->ep_is_in || | |
2919 | chan->data_pid_start == DWC2_HC_PID_SETUP) { | |
2920 | if ((fifo_dwords_avail * 4) >= chan->max_packet) { | |
2921 | if (!chan->xfer_started) { | |
2922 | dwc2_hc_start_transfer(hsotg, chan); | |
2923 | retval = 1; | |
2924 | } else { | |
2925 | retval = dwc2_hc_continue_transfer(hsotg, chan); | |
2926 | } | |
2927 | } else { | |
2928 | retval = -1; | |
2929 | } | |
2930 | } else { | |
2931 | if (!chan->xfer_started) { | |
2932 | dwc2_hc_start_transfer(hsotg, chan); | |
2933 | retval = 1; | |
2934 | } else { | |
2935 | retval = dwc2_hc_continue_transfer(hsotg, chan); | |
2936 | } | |
2937 | } | |
2938 | ||
2939 | return retval; | |
2940 | } | |
2941 | ||
2942 | /* | |
2943 | * Processes periodic channels for the next frame and queues transactions for | |
2944 | * these channels to the DWC_otg controller. After queueing transactions, the | |
2945 | * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions | |
2946 | * to queue as Periodic Tx FIFO or request queue space becomes available. | |
2947 | * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled. | |
2948 | * | |
2949 | * Must be called with interrupt disabled and spinlock held | |
2950 | */ | |
2951 | static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg) | |
2952 | { | |
2953 | struct list_head *qh_ptr; | |
2954 | struct dwc2_qh *qh; | |
2955 | u32 tx_status; | |
2956 | u32 fspcavail; | |
2957 | u32 gintmsk; | |
2958 | int status; | |
4e50e011 DA |
2959 | bool no_queue_space = false; |
2960 | bool no_fifo_space = false; | |
7359d482 PZ |
2961 | u32 qspcavail; |
2962 | ||
4e50e011 DA |
2963 | /* If empty list then just adjust interrupt enables */ |
2964 | if (list_empty(&hsotg->periodic_sched_assigned)) | |
2965 | goto exit; | |
2966 | ||
b49977a6 MK |
2967 | if (dbg_perio()) |
2968 | dev_vdbg(hsotg->dev, "Queue periodic transactions\n"); | |
7359d482 | 2969 | |
95c8bc36 | 2970 | tx_status = dwc2_readl(hsotg->regs + HPTXSTS); |
d6ec53e0 MK |
2971 | qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
2972 | TXSTS_QSPCAVAIL_SHIFT; | |
2973 | fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> | |
2974 | TXSTS_FSPCAVAIL_SHIFT; | |
b49977a6 MK |
2975 | |
2976 | if (dbg_perio()) { | |
2977 | dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n", | |
2978 | qspcavail); | |
2979 | dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n", | |
2980 | fspcavail); | |
2981 | } | |
7359d482 PZ |
2982 | |
2983 | qh_ptr = hsotg->periodic_sched_assigned.next; | |
2984 | while (qh_ptr != &hsotg->periodic_sched_assigned) { | |
95c8bc36 | 2985 | tx_status = dwc2_readl(hsotg->regs + HPTXSTS); |
acdb9046 MK |
2986 | qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
2987 | TXSTS_QSPCAVAIL_SHIFT; | |
2988 | if (qspcavail == 0) { | |
fdb09b3e | 2989 | no_queue_space = true; |
7359d482 PZ |
2990 | break; |
2991 | } | |
2992 | ||
2993 | qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry); | |
2994 | if (!qh->channel) { | |
2995 | qh_ptr = qh_ptr->next; | |
2996 | continue; | |
2997 | } | |
2998 | ||
2999 | /* Make sure EP's TT buffer is clean before queueing qtds */ | |
3000 | if (qh->tt_buffer_dirty) { | |
3001 | qh_ptr = qh_ptr->next; | |
3002 | continue; | |
3003 | } | |
3004 | ||
3005 | /* | |
3006 | * Set a flag if we're queuing high-bandwidth in slave mode. | |
3007 | * The flag prevents any halts to get into the request queue in | |
3008 | * the middle of multiple high-bandwidth packets getting queued. | |
3009 | */ | |
95832c00 | 3010 | if (!hsotg->params.host_dma && |
9da51974 | 3011 | qh->channel->multi_count > 1) |
7359d482 PZ |
3012 | hsotg->queuing_high_bandwidth = 1; |
3013 | ||
d6ec53e0 MK |
3014 | fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
3015 | TXSTS_FSPCAVAIL_SHIFT; | |
7359d482 PZ |
3016 | status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); |
3017 | if (status < 0) { | |
fdb09b3e | 3018 | no_fifo_space = true; |
7359d482 PZ |
3019 | break; |
3020 | } | |
3021 | ||
3022 | /* | |
3023 | * In Slave mode, stay on the current transfer until there is | |
3024 | * nothing more to do or the high-bandwidth request count is | |
3025 | * reached. In DMA mode, only need to queue one request. The | |
3026 | * controller automatically handles multiple packets for | |
3027 | * high-bandwidth transfers. | |
3028 | */ | |
95832c00 | 3029 | if (hsotg->params.host_dma || status == 0 || |
7359d482 PZ |
3030 | qh->channel->requests == qh->channel->multi_count) { |
3031 | qh_ptr = qh_ptr->next; | |
3032 | /* | |
3033 | * Move the QH from the periodic assigned schedule to | |
3034 | * the periodic queued schedule | |
3035 | */ | |
94ef7aee DA |
3036 | list_move_tail(&qh->qh_list_entry, |
3037 | &hsotg->periodic_sched_queued); | |
7359d482 PZ |
3038 | |
3039 | /* done queuing high bandwidth */ | |
3040 | hsotg->queuing_high_bandwidth = 0; | |
3041 | } | |
3042 | } | |
3043 | ||
4e50e011 DA |
3044 | exit: |
3045 | if (no_queue_space || no_fifo_space || | |
95832c00 | 3046 | (!hsotg->params.host_dma && |
4e50e011 DA |
3047 | !list_empty(&hsotg->periodic_sched_assigned))) { |
3048 | /* | |
3049 | * May need to queue more transactions as the request | |
3050 | * queue or Tx FIFO empties. Enable the periodic Tx | |
3051 | * FIFO empty interrupt. (Always use the half-empty | |
3052 | * level to ensure that new requests are loaded as | |
3053 | * soon as possible.) | |
3054 | */ | |
3055 | gintmsk = dwc2_readl(hsotg->regs + GINTMSK); | |
3056 | if (!(gintmsk & GINTSTS_PTXFEMP)) { | |
7359d482 | 3057 | gintmsk |= GINTSTS_PTXFEMP; |
95c8bc36 | 3058 | dwc2_writel(gintmsk, hsotg->regs + GINTMSK); |
4e50e011 DA |
3059 | } |
3060 | } else { | |
3061 | /* | |
3062 | * Disable the Tx FIFO empty interrupt since there are | |
3063 | * no more transactions that need to be queued right | |
3064 | * now. This function is called from interrupt | |
3065 | * handlers to queue more transactions as transfer | |
3066 | * states change. | |
38beaec6 | 3067 | */ |
4e50e011 DA |
3068 | gintmsk = dwc2_readl(hsotg->regs + GINTMSK); |
3069 | if (gintmsk & GINTSTS_PTXFEMP) { | |
7359d482 | 3070 | gintmsk &= ~GINTSTS_PTXFEMP; |
95c8bc36 | 3071 | dwc2_writel(gintmsk, hsotg->regs + GINTMSK); |
7359d482 PZ |
3072 | } |
3073 | } | |
3074 | } | |
3075 | ||
3076 | /* | |
3077 | * Processes active non-periodic channels and queues transactions for these | |
3078 | * channels to the DWC_otg controller. After queueing transactions, the NP Tx | |
3079 | * FIFO Empty interrupt is enabled if there are more transactions to queue as | |
3080 | * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx | |
3081 | * FIFO Empty interrupt is disabled. | |
3082 | * | |
3083 | * Must be called with interrupt disabled and spinlock held | |
3084 | */ | |
3085 | static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg) | |
3086 | { | |
3087 | struct list_head *orig_qh_ptr; | |
3088 | struct dwc2_qh *qh; | |
3089 | u32 tx_status; | |
3090 | u32 qspcavail; | |
3091 | u32 fspcavail; | |
3092 | u32 gintmsk; | |
3093 | int status; | |
3094 | int no_queue_space = 0; | |
3095 | int no_fifo_space = 0; | |
3096 | int more_to_do = 0; | |
3097 | ||
3098 | dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n"); | |
3099 | ||
95c8bc36 | 3100 | tx_status = dwc2_readl(hsotg->regs + GNPTXSTS); |
d6ec53e0 MK |
3101 | qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
3102 | TXSTS_QSPCAVAIL_SHIFT; | |
3103 | fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> | |
3104 | TXSTS_FSPCAVAIL_SHIFT; | |
7359d482 PZ |
3105 | dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n", |
3106 | qspcavail); | |
3107 | dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n", | |
3108 | fspcavail); | |
3109 | ||
3110 | /* | |
3111 | * Keep track of the starting point. Skip over the start-of-list | |
3112 | * entry. | |
3113 | */ | |
3114 | if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active) | |
3115 | hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; | |
3116 | orig_qh_ptr = hsotg->non_periodic_qh_ptr; | |
3117 | ||
3118 | /* | |
3119 | * Process once through the active list or until no more space is | |
3120 | * available in the request queue or the Tx FIFO | |
3121 | */ | |
3122 | do { | |
95c8bc36 | 3123 | tx_status = dwc2_readl(hsotg->regs + GNPTXSTS); |
d6ec53e0 MK |
3124 | qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
3125 | TXSTS_QSPCAVAIL_SHIFT; | |
95832c00 | 3126 | if (!hsotg->params.host_dma && qspcavail == 0) { |
7359d482 PZ |
3127 | no_queue_space = 1; |
3128 | break; | |
3129 | } | |
3130 | ||
3131 | qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh, | |
3132 | qh_list_entry); | |
3133 | if (!qh->channel) | |
3134 | goto next; | |
3135 | ||
3136 | /* Make sure EP's TT buffer is clean before queueing qtds */ | |
3137 | if (qh->tt_buffer_dirty) | |
3138 | goto next; | |
3139 | ||
d6ec53e0 MK |
3140 | fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> |
3141 | TXSTS_FSPCAVAIL_SHIFT; | |
7359d482 PZ |
3142 | status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail); |
3143 | ||
3144 | if (status > 0) { | |
3145 | more_to_do = 1; | |
3146 | } else if (status < 0) { | |
3147 | no_fifo_space = 1; | |
3148 | break; | |
3149 | } | |
3150 | next: | |
3151 | /* Advance to next QH, skipping start-of-list entry */ | |
3152 | hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next; | |
3153 | if (hsotg->non_periodic_qh_ptr == | |
3154 | &hsotg->non_periodic_sched_active) | |
3155 | hsotg->non_periodic_qh_ptr = | |
3156 | hsotg->non_periodic_qh_ptr->next; | |
3157 | } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr); | |
3158 | ||
95832c00 | 3159 | if (!hsotg->params.host_dma) { |
95c8bc36 | 3160 | tx_status = dwc2_readl(hsotg->regs + GNPTXSTS); |
d6ec53e0 MK |
3161 | qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >> |
3162 | TXSTS_QSPCAVAIL_SHIFT; | |
3163 | fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >> | |
3164 | TXSTS_FSPCAVAIL_SHIFT; | |
7359d482 PZ |
3165 | dev_vdbg(hsotg->dev, |
3166 | " NP Tx Req Queue Space Avail (after queue): %d\n", | |
3167 | qspcavail); | |
3168 | dev_vdbg(hsotg->dev, | |
3169 | " NP Tx FIFO Space Avail (after queue): %d\n", | |
3170 | fspcavail); | |
3171 | ||
3172 | if (more_to_do || no_queue_space || no_fifo_space) { | |
3173 | /* | |
3174 | * May need to queue more transactions as the request | |
3175 | * queue or Tx FIFO empties. Enable the non-periodic | |
3176 | * Tx FIFO empty interrupt. (Always use the half-empty | |
3177 | * level to ensure that new requests are loaded as | |
3178 | * soon as possible.) | |
3179 | */ | |
95c8bc36 | 3180 | gintmsk = dwc2_readl(hsotg->regs + GINTMSK); |
7359d482 | 3181 | gintmsk |= GINTSTS_NPTXFEMP; |
95c8bc36 | 3182 | dwc2_writel(gintmsk, hsotg->regs + GINTMSK); |
7359d482 PZ |
3183 | } else { |
3184 | /* | |
3185 | * Disable the Tx FIFO empty interrupt since there are | |
3186 | * no more transactions that need to be queued right | |
3187 | * now. This function is called from interrupt | |
3188 | * handlers to queue more transactions as transfer | |
3189 | * states change. | |
3190 | */ | |
95c8bc36 | 3191 | gintmsk = dwc2_readl(hsotg->regs + GINTMSK); |
7359d482 | 3192 | gintmsk &= ~GINTSTS_NPTXFEMP; |
95c8bc36 | 3193 | dwc2_writel(gintmsk, hsotg->regs + GINTMSK); |
7359d482 PZ |
3194 | } |
3195 | } | |
3196 | } | |
3197 | ||
3198 | /** | |
3199 | * dwc2_hcd_queue_transactions() - Processes the currently active host channels | |
3200 | * and queues transactions for these channels to the DWC_otg controller. Called | |
3201 | * from the HCD interrupt handler functions. | |
3202 | * | |
3203 | * @hsotg: The HCD state structure | |
3204 | * @tr_type: The type(s) of transactions to queue (non-periodic, periodic, | |
3205 | * or both) | |
3206 | * | |
3207 | * Must be called with interrupt disabled and spinlock held | |
3208 | */ | |
3209 | void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg, | |
3210 | enum dwc2_transaction_type tr_type) | |
3211 | { | |
3212 | #ifdef DWC2_DEBUG_SOF | |
3213 | dev_vdbg(hsotg->dev, "Queue Transactions\n"); | |
3214 | #endif | |
3215 | /* Process host channels associated with periodic transfers */ | |
4e50e011 DA |
3216 | if (tr_type == DWC2_TRANSACTION_PERIODIC || |
3217 | tr_type == DWC2_TRANSACTION_ALL) | |
7359d482 PZ |
3218 | dwc2_process_periodic_channels(hsotg); |
3219 | ||
3220 | /* Process host channels associated with non-periodic transfers */ | |
3221 | if (tr_type == DWC2_TRANSACTION_NON_PERIODIC || | |
3222 | tr_type == DWC2_TRANSACTION_ALL) { | |
3223 | if (!list_empty(&hsotg->non_periodic_sched_active)) { | |
3224 | dwc2_process_non_periodic_channels(hsotg); | |
3225 | } else { | |
3226 | /* | |
3227 | * Ensure NP Tx FIFO empty interrupt is disabled when | |
3228 | * there are no non-periodic transfers to process | |
3229 | */ | |
95c8bc36 | 3230 | u32 gintmsk = dwc2_readl(hsotg->regs + GINTMSK); |
7359d482 PZ |
3231 | |
3232 | gintmsk &= ~GINTSTS_NPTXFEMP; | |
95c8bc36 | 3233 | dwc2_writel(gintmsk, hsotg->regs + GINTMSK); |
7359d482 PZ |
3234 | } |
3235 | } | |
3236 | } | |
3237 | ||
3238 | static void dwc2_conn_id_status_change(struct work_struct *work) | |
3239 | { | |
3240 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
3241 | wf_otg); | |
3242 | u32 count = 0; | |
3243 | u32 gotgctl; | |
5390d438 | 3244 | unsigned long flags; |
7359d482 PZ |
3245 | |
3246 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
3247 | ||
95c8bc36 | 3248 | gotgctl = dwc2_readl(hsotg->regs + GOTGCTL); |
7359d482 PZ |
3249 | dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl); |
3250 | dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n", | |
3251 | !!(gotgctl & GOTGCTL_CONID_B)); | |
3252 | ||
3253 | /* B-Device connector (Device Mode) */ | |
3254 | if (gotgctl & GOTGCTL_CONID_B) { | |
3255 | /* Wait for switch to device mode */ | |
3256 | dev_dbg(hsotg->dev, "connId B\n"); | |
9156a7ef CY |
3257 | if (hsotg->bus_suspended) { |
3258 | dev_info(hsotg->dev, | |
3259 | "Do port resume before switching to device mode\n"); | |
3260 | dwc2_port_resume(hsotg); | |
3261 | } | |
7359d482 PZ |
3262 | while (!dwc2_is_device_mode(hsotg)) { |
3263 | dev_info(hsotg->dev, | |
3264 | "Waiting for Peripheral Mode, Mode=%s\n", | |
3265 | dwc2_is_host_mode(hsotg) ? "Host" : | |
3266 | "Peripheral"); | |
04a9db79 | 3267 | msleep(20); |
fc30c4bb JS |
3268 | /* |
3269 | * Sometimes the initial GOTGCTRL read is wrong, so | |
3270 | * check it again and jump to host mode if that was | |
3271 | * the case. | |
3272 | */ | |
3273 | gotgctl = dwc2_readl(hsotg->regs + GOTGCTL); | |
3274 | if (!(gotgctl & GOTGCTL_CONID_B)) | |
3275 | goto host; | |
7359d482 PZ |
3276 | if (++count > 250) |
3277 | break; | |
3278 | } | |
3279 | if (count > 250) | |
3280 | dev_err(hsotg->dev, | |
de9169a1 | 3281 | "Connection id status change timed out\n"); |
7359d482 | 3282 | hsotg->op_state = OTG_STATE_B_PERIPHERAL; |
0fe239bc | 3283 | dwc2_core_init(hsotg, false); |
7359d482 | 3284 | dwc2_enable_global_interrupts(hsotg); |
5390d438 | 3285 | spin_lock_irqsave(&hsotg->lock, flags); |
1f91b4cc | 3286 | dwc2_hsotg_core_init_disconnected(hsotg, false); |
5390d438 | 3287 | spin_unlock_irqrestore(&hsotg->lock, flags); |
1f91b4cc | 3288 | dwc2_hsotg_core_connect(hsotg); |
7359d482 | 3289 | } else { |
fc30c4bb | 3290 | host: |
7359d482 PZ |
3291 | /* A-Device connector (Host Mode) */ |
3292 | dev_dbg(hsotg->dev, "connId A\n"); | |
3293 | while (!dwc2_is_host_mode(hsotg)) { | |
3294 | dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n", | |
3295 | dwc2_is_host_mode(hsotg) ? | |
3296 | "Host" : "Peripheral"); | |
04a9db79 | 3297 | msleep(20); |
7359d482 PZ |
3298 | if (++count > 250) |
3299 | break; | |
3300 | } | |
3301 | if (count > 250) | |
3302 | dev_err(hsotg->dev, | |
de9169a1 | 3303 | "Connection id status change timed out\n"); |
7359d482 | 3304 | |
d2471d4a JS |
3305 | spin_lock_irqsave(&hsotg->lock, flags); |
3306 | dwc2_hsotg_disconnect(hsotg); | |
3307 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3308 | ||
3309 | hsotg->op_state = OTG_STATE_A_HOST; | |
7359d482 | 3310 | /* Initialize the Core for Host mode */ |
0fe239bc | 3311 | dwc2_core_init(hsotg, false); |
7359d482 PZ |
3312 | dwc2_enable_global_interrupts(hsotg); |
3313 | dwc2_hcd_start(hsotg); | |
3314 | } | |
3315 | } | |
3316 | ||
e99e88a9 | 3317 | static void dwc2_wakeup_detected(struct timer_list *t) |
7359d482 | 3318 | { |
e99e88a9 | 3319 | struct dwc2_hsotg *hsotg = from_timer(hsotg, t, wkp_timer); |
7359d482 PZ |
3320 | u32 hprt0; |
3321 | ||
3322 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
3323 | ||
3324 | /* | |
3325 | * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms | |
3326 | * so that OPT tests pass with all PHYs.) | |
3327 | */ | |
3328 | hprt0 = dwc2_read_hprt0(hsotg); | |
3329 | dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0); | |
3330 | hprt0 &= ~HPRT0_RES; | |
95c8bc36 | 3331 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 | 3332 | dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n", |
95c8bc36 | 3333 | dwc2_readl(hsotg->regs + HPRT0)); |
7359d482 PZ |
3334 | |
3335 | dwc2_hcd_rem_wakeup(hsotg); | |
fdb09b3e | 3336 | hsotg->bus_suspended = false; |
7359d482 PZ |
3337 | |
3338 | /* Change to L0 state */ | |
3339 | hsotg->lx_state = DWC2_L0; | |
3340 | } | |
3341 | ||
3342 | static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg) | |
3343 | { | |
3344 | struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg); | |
3345 | ||
3346 | return hcd->self.b_hnp_enable; | |
3347 | } | |
3348 | ||
3349 | /* Must NOT be called with interrupt disabled or spinlock held */ | |
3350 | static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex) | |
3351 | { | |
3352 | unsigned long flags; | |
3353 | u32 hprt0; | |
3354 | u32 pcgctl; | |
3355 | u32 gotgctl; | |
3356 | ||
3357 | dev_dbg(hsotg->dev, "%s()\n", __func__); | |
3358 | ||
3359 | spin_lock_irqsave(&hsotg->lock, flags); | |
3360 | ||
3361 | if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) { | |
95c8bc36 | 3362 | gotgctl = dwc2_readl(hsotg->regs + GOTGCTL); |
7359d482 | 3363 | gotgctl |= GOTGCTL_HSTSETHNPEN; |
95c8bc36 | 3364 | dwc2_writel(gotgctl, hsotg->regs + GOTGCTL); |
7359d482 PZ |
3365 | hsotg->op_state = OTG_STATE_A_SUSPEND; |
3366 | } | |
3367 | ||
3368 | hprt0 = dwc2_read_hprt0(hsotg); | |
3369 | hprt0 |= HPRT0_SUSP; | |
95c8bc36 | 3370 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 | 3371 | |
fdb09b3e | 3372 | hsotg->bus_suspended = true; |
7359d482 | 3373 | |
a2a23d3f GH |
3374 | /* |
3375 | * If hibernation is supported, Phy clock will be suspended | |
3376 | * after registers are backuped. | |
3377 | */ | |
bea8e86c | 3378 | if (!hsotg->params.hibernation) { |
a2a23d3f GH |
3379 | /* Suspend the Phy Clock */ |
3380 | pcgctl = dwc2_readl(hsotg->regs + PCGCTL); | |
3381 | pcgctl |= PCGCTL_STOPPCLK; | |
3382 | dwc2_writel(pcgctl, hsotg->regs + PCGCTL); | |
3383 | udelay(10); | |
3384 | } | |
7359d482 PZ |
3385 | |
3386 | /* For HNP the bus must be suspended for at least 200ms */ | |
3387 | if (dwc2_host_is_b_hnp_enabled(hsotg)) { | |
95c8bc36 | 3388 | pcgctl = dwc2_readl(hsotg->regs + PCGCTL); |
7359d482 | 3389 | pcgctl &= ~PCGCTL_STOPPCLK; |
95c8bc36 | 3390 | dwc2_writel(pcgctl, hsotg->regs + PCGCTL); |
7359d482 PZ |
3391 | |
3392 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3393 | ||
04a9db79 | 3394 | msleep(200); |
7359d482 PZ |
3395 | } else { |
3396 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3397 | } | |
3398 | } | |
3399 | ||
30db103c GH |
3400 | /* Must NOT be called with interrupt disabled or spinlock held */ |
3401 | static void dwc2_port_resume(struct dwc2_hsotg *hsotg) | |
3402 | { | |
3403 | unsigned long flags; | |
3404 | u32 hprt0; | |
3405 | u32 pcgctl; | |
3406 | ||
4d273c2a DA |
3407 | spin_lock_irqsave(&hsotg->lock, flags); |
3408 | ||
a2a23d3f GH |
3409 | /* |
3410 | * If hibernation is supported, Phy clock is already resumed | |
3411 | * after registers restore. | |
3412 | */ | |
bea8e86c | 3413 | if (!hsotg->params.hibernation) { |
a2a23d3f GH |
3414 | pcgctl = dwc2_readl(hsotg->regs + PCGCTL); |
3415 | pcgctl &= ~PCGCTL_STOPPCLK; | |
3416 | dwc2_writel(pcgctl, hsotg->regs + PCGCTL); | |
4d273c2a | 3417 | spin_unlock_irqrestore(&hsotg->lock, flags); |
04a9db79 | 3418 | msleep(20); |
4d273c2a | 3419 | spin_lock_irqsave(&hsotg->lock, flags); |
a2a23d3f | 3420 | } |
30db103c | 3421 | |
30db103c GH |
3422 | hprt0 = dwc2_read_hprt0(hsotg); |
3423 | hprt0 |= HPRT0_RES; | |
3424 | hprt0 &= ~HPRT0_SUSP; | |
3425 | dwc2_writel(hprt0, hsotg->regs + HPRT0); | |
3426 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3427 | ||
3428 | msleep(USB_RESUME_TIMEOUT); | |
3429 | ||
3430 | spin_lock_irqsave(&hsotg->lock, flags); | |
3431 | hprt0 = dwc2_read_hprt0(hsotg); | |
3432 | hprt0 &= ~(HPRT0_RES | HPRT0_SUSP); | |
3433 | dwc2_writel(hprt0, hsotg->regs + HPRT0); | |
fdb09b3e | 3434 | hsotg->bus_suspended = false; |
30db103c GH |
3435 | spin_unlock_irqrestore(&hsotg->lock, flags); |
3436 | } | |
3437 | ||
7359d482 PZ |
3438 | /* Handles hub class-specific requests */ |
3439 | static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq, | |
3440 | u16 wvalue, u16 windex, char *buf, u16 wlength) | |
3441 | { | |
3442 | struct usb_hub_descriptor *hub_desc; | |
3443 | int retval = 0; | |
3444 | u32 hprt0; | |
3445 | u32 port_status; | |
3446 | u32 speed; | |
3447 | u32 pcgctl; | |
3448 | ||
3449 | switch (typereq) { | |
3450 | case ClearHubFeature: | |
3451 | dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue); | |
3452 | ||
3453 | switch (wvalue) { | |
3454 | case C_HUB_LOCAL_POWER: | |
3455 | case C_HUB_OVER_CURRENT: | |
3456 | /* Nothing required here */ | |
3457 | break; | |
3458 | ||
3459 | default: | |
3460 | retval = -EINVAL; | |
3461 | dev_err(hsotg->dev, | |
3462 | "ClearHubFeature request %1xh unknown\n", | |
3463 | wvalue); | |
3464 | } | |
3465 | break; | |
3466 | ||
3467 | case ClearPortFeature: | |
3468 | if (wvalue != USB_PORT_FEAT_L1) | |
3469 | if (!windex || windex > 1) | |
3470 | goto error; | |
3471 | switch (wvalue) { | |
3472 | case USB_PORT_FEAT_ENABLE: | |
3473 | dev_dbg(hsotg->dev, | |
3474 | "ClearPortFeature USB_PORT_FEAT_ENABLE\n"); | |
3475 | hprt0 = dwc2_read_hprt0(hsotg); | |
3476 | hprt0 |= HPRT0_ENA; | |
95c8bc36 | 3477 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
3478 | break; |
3479 | ||
3480 | case USB_PORT_FEAT_SUSPEND: | |
3481 | dev_dbg(hsotg->dev, | |
3482 | "ClearPortFeature USB_PORT_FEAT_SUSPEND\n"); | |
b0bb9bb6 | 3483 | |
bea78555 GH |
3484 | if (hsotg->bus_suspended) |
3485 | dwc2_port_resume(hsotg); | |
7359d482 PZ |
3486 | break; |
3487 | ||
3488 | case USB_PORT_FEAT_POWER: | |
3489 | dev_dbg(hsotg->dev, | |
3490 | "ClearPortFeature USB_PORT_FEAT_POWER\n"); | |
3491 | hprt0 = dwc2_read_hprt0(hsotg); | |
3492 | hprt0 &= ~HPRT0_PWR; | |
95c8bc36 | 3493 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
3494 | break; |
3495 | ||
3496 | case USB_PORT_FEAT_INDICATOR: | |
3497 | dev_dbg(hsotg->dev, | |
3498 | "ClearPortFeature USB_PORT_FEAT_INDICATOR\n"); | |
3499 | /* Port indicator not supported */ | |
3500 | break; | |
3501 | ||
3502 | case USB_PORT_FEAT_C_CONNECTION: | |
3503 | /* | |
3504 | * Clears driver's internal Connect Status Change flag | |
3505 | */ | |
3506 | dev_dbg(hsotg->dev, | |
3507 | "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n"); | |
3508 | hsotg->flags.b.port_connect_status_change = 0; | |
3509 | break; | |
3510 | ||
3511 | case USB_PORT_FEAT_C_RESET: | |
3512 | /* Clears driver's internal Port Reset Change flag */ | |
3513 | dev_dbg(hsotg->dev, | |
3514 | "ClearPortFeature USB_PORT_FEAT_C_RESET\n"); | |
3515 | hsotg->flags.b.port_reset_change = 0; | |
3516 | break; | |
3517 | ||
3518 | case USB_PORT_FEAT_C_ENABLE: | |
3519 | /* | |
3520 | * Clears the driver's internal Port Enable/Disable | |
3521 | * Change flag | |
3522 | */ | |
3523 | dev_dbg(hsotg->dev, | |
3524 | "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n"); | |
3525 | hsotg->flags.b.port_enable_change = 0; | |
3526 | break; | |
3527 | ||
3528 | case USB_PORT_FEAT_C_SUSPEND: | |
3529 | /* | |
3530 | * Clears the driver's internal Port Suspend Change | |
3531 | * flag, which is set when resume signaling on the host | |
3532 | * port is complete | |
3533 | */ | |
3534 | dev_dbg(hsotg->dev, | |
3535 | "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n"); | |
3536 | hsotg->flags.b.port_suspend_change = 0; | |
3537 | break; | |
3538 | ||
3539 | case USB_PORT_FEAT_C_PORT_L1: | |
3540 | dev_dbg(hsotg->dev, | |
3541 | "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n"); | |
3542 | hsotg->flags.b.port_l1_change = 0; | |
3543 | break; | |
3544 | ||
3545 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
3546 | dev_dbg(hsotg->dev, | |
3547 | "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n"); | |
3548 | hsotg->flags.b.port_over_current_change = 0; | |
3549 | break; | |
3550 | ||
3551 | default: | |
3552 | retval = -EINVAL; | |
3553 | dev_err(hsotg->dev, | |
3554 | "ClearPortFeature request %1xh unknown or unsupported\n", | |
3555 | wvalue); | |
3556 | } | |
3557 | break; | |
3558 | ||
3559 | case GetHubDescriptor: | |
3560 | dev_dbg(hsotg->dev, "GetHubDescriptor\n"); | |
3561 | hub_desc = (struct usb_hub_descriptor *)buf; | |
3562 | hub_desc->bDescLength = 9; | |
a5dd0395 | 3563 | hub_desc->bDescriptorType = USB_DT_HUB; |
7359d482 | 3564 | hub_desc->bNbrPorts = 1; |
3d040de8 SS |
3565 | hub_desc->wHubCharacteristics = |
3566 | cpu_to_le16(HUB_CHAR_COMMON_LPSM | | |
3567 | HUB_CHAR_INDV_PORT_OCPM); | |
7359d482 PZ |
3568 | hub_desc->bPwrOn2PwrGood = 1; |
3569 | hub_desc->bHubContrCurrent = 0; | |
3570 | hub_desc->u.hs.DeviceRemovable[0] = 0; | |
3571 | hub_desc->u.hs.DeviceRemovable[1] = 0xff; | |
3572 | break; | |
3573 | ||
3574 | case GetHubStatus: | |
3575 | dev_dbg(hsotg->dev, "GetHubStatus\n"); | |
3576 | memset(buf, 0, 4); | |
3577 | break; | |
3578 | ||
3579 | case GetPortStatus: | |
b8313417 PZ |
3580 | dev_vdbg(hsotg->dev, |
3581 | "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex, | |
3582 | hsotg->flags.d32); | |
7359d482 PZ |
3583 | if (!windex || windex > 1) |
3584 | goto error; | |
3585 | ||
3586 | port_status = 0; | |
3587 | if (hsotg->flags.b.port_connect_status_change) | |
3588 | port_status |= USB_PORT_STAT_C_CONNECTION << 16; | |
3589 | if (hsotg->flags.b.port_enable_change) | |
3590 | port_status |= USB_PORT_STAT_C_ENABLE << 16; | |
3591 | if (hsotg->flags.b.port_suspend_change) | |
3592 | port_status |= USB_PORT_STAT_C_SUSPEND << 16; | |
3593 | if (hsotg->flags.b.port_l1_change) | |
3594 | port_status |= USB_PORT_STAT_C_L1 << 16; | |
3595 | if (hsotg->flags.b.port_reset_change) | |
3596 | port_status |= USB_PORT_STAT_C_RESET << 16; | |
3597 | if (hsotg->flags.b.port_over_current_change) { | |
3598 | dev_warn(hsotg->dev, "Overcurrent change detected\n"); | |
3599 | port_status |= USB_PORT_STAT_C_OVERCURRENT << 16; | |
3600 | } | |
3601 | ||
3602 | if (!hsotg->flags.b.port_connect_status) { | |
3603 | /* | |
3604 | * The port is disconnected, which means the core is | |
3605 | * either in device mode or it soon will be. Just | |
3606 | * return 0's for the remainder of the port status | |
3607 | * since the port register can't be read if the core | |
3608 | * is in device mode. | |
3609 | */ | |
3610 | *(__le32 *)buf = cpu_to_le32(port_status); | |
3611 | break; | |
3612 | } | |
3613 | ||
95c8bc36 | 3614 | hprt0 = dwc2_readl(hsotg->regs + HPRT0); |
b8313417 | 3615 | dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0); |
7359d482 PZ |
3616 | |
3617 | if (hprt0 & HPRT0_CONNSTS) | |
3618 | port_status |= USB_PORT_STAT_CONNECTION; | |
3619 | if (hprt0 & HPRT0_ENA) | |
3620 | port_status |= USB_PORT_STAT_ENABLE; | |
3621 | if (hprt0 & HPRT0_SUSP) | |
3622 | port_status |= USB_PORT_STAT_SUSPEND; | |
3623 | if (hprt0 & HPRT0_OVRCURRACT) | |
3624 | port_status |= USB_PORT_STAT_OVERCURRENT; | |
3625 | if (hprt0 & HPRT0_RST) | |
3626 | port_status |= USB_PORT_STAT_RESET; | |
3627 | if (hprt0 & HPRT0_PWR) | |
3628 | port_status |= USB_PORT_STAT_POWER; | |
3629 | ||
f9234633 | 3630 | speed = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
7359d482 PZ |
3631 | if (speed == HPRT0_SPD_HIGH_SPEED) |
3632 | port_status |= USB_PORT_STAT_HIGH_SPEED; | |
3633 | else if (speed == HPRT0_SPD_LOW_SPEED) | |
3634 | port_status |= USB_PORT_STAT_LOW_SPEED; | |
3635 | ||
3636 | if (hprt0 & HPRT0_TSTCTL_MASK) | |
3637 | port_status |= USB_PORT_STAT_TEST; | |
3638 | /* USB_PORT_FEAT_INDICATOR unsupported always 0 */ | |
3639 | ||
bea8e86c | 3640 | if (hsotg->params.dma_desc_fs_enable) { |
fbb9e22b MYK |
3641 | /* |
3642 | * Enable descriptor DMA only if a full speed | |
3643 | * device is connected. | |
3644 | */ | |
3645 | if (hsotg->new_connection && | |
3646 | ((port_status & | |
3647 | (USB_PORT_STAT_CONNECTION | | |
3648 | USB_PORT_STAT_HIGH_SPEED | | |
3649 | USB_PORT_STAT_LOW_SPEED)) == | |
3650 | USB_PORT_STAT_CONNECTION)) { | |
3651 | u32 hcfg; | |
3652 | ||
3653 | dev_info(hsotg->dev, "Enabling descriptor DMA mode\n"); | |
95832c00 | 3654 | hsotg->params.dma_desc_enable = true; |
fbb9e22b MYK |
3655 | hcfg = dwc2_readl(hsotg->regs + HCFG); |
3656 | hcfg |= HCFG_DESCDMA; | |
3657 | dwc2_writel(hcfg, hsotg->regs + HCFG); | |
3658 | hsotg->new_connection = false; | |
3659 | } | |
3660 | } | |
3661 | ||
b8313417 | 3662 | dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status); |
7359d482 PZ |
3663 | *(__le32 *)buf = cpu_to_le32(port_status); |
3664 | break; | |
3665 | ||
3666 | case SetHubFeature: | |
3667 | dev_dbg(hsotg->dev, "SetHubFeature\n"); | |
3668 | /* No HUB features supported */ | |
3669 | break; | |
3670 | ||
3671 | case SetPortFeature: | |
3672 | dev_dbg(hsotg->dev, "SetPortFeature\n"); | |
3673 | if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1)) | |
3674 | goto error; | |
3675 | ||
3676 | if (!hsotg->flags.b.port_connect_status) { | |
3677 | /* | |
3678 | * The port is disconnected, which means the core is | |
3679 | * either in device mode or it soon will be. Just | |
3680 | * return without doing anything since the port | |
3681 | * register can't be written if the core is in device | |
3682 | * mode. | |
3683 | */ | |
3684 | break; | |
3685 | } | |
3686 | ||
3687 | switch (wvalue) { | |
3688 | case USB_PORT_FEAT_SUSPEND: | |
3689 | dev_dbg(hsotg->dev, | |
3690 | "SetPortFeature - USB_PORT_FEAT_SUSPEND\n"); | |
3691 | if (windex != hsotg->otg_port) | |
3692 | goto error; | |
3693 | dwc2_port_suspend(hsotg, windex); | |
3694 | break; | |
3695 | ||
3696 | case USB_PORT_FEAT_POWER: | |
3697 | dev_dbg(hsotg->dev, | |
3698 | "SetPortFeature - USB_PORT_FEAT_POWER\n"); | |
3699 | hprt0 = dwc2_read_hprt0(hsotg); | |
3700 | hprt0 |= HPRT0_PWR; | |
95c8bc36 | 3701 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
3702 | break; |
3703 | ||
3704 | case USB_PORT_FEAT_RESET: | |
3705 | hprt0 = dwc2_read_hprt0(hsotg); | |
3706 | dev_dbg(hsotg->dev, | |
3707 | "SetPortFeature - USB_PORT_FEAT_RESET\n"); | |
95c8bc36 | 3708 | pcgctl = dwc2_readl(hsotg->regs + PCGCTL); |
7359d482 | 3709 | pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK); |
95c8bc36 | 3710 | dwc2_writel(pcgctl, hsotg->regs + PCGCTL); |
7359d482 | 3711 | /* ??? Original driver does this */ |
95c8bc36 | 3712 | dwc2_writel(0, hsotg->regs + PCGCTL); |
7359d482 PZ |
3713 | |
3714 | hprt0 = dwc2_read_hprt0(hsotg); | |
3715 | /* Clear suspend bit if resetting from suspend state */ | |
3716 | hprt0 &= ~HPRT0_SUSP; | |
3717 | ||
3718 | /* | |
3719 | * When B-Host the Port reset bit is set in the Start | |
3720 | * HCD Callback function, so that the reset is started | |
3721 | * within 1ms of the HNP success interrupt | |
3722 | */ | |
3723 | if (!dwc2_hcd_is_b_host(hsotg)) { | |
3724 | hprt0 |= HPRT0_PWR | HPRT0_RST; | |
3725 | dev_dbg(hsotg->dev, | |
3726 | "In host mode, hprt0=%08x\n", hprt0); | |
95c8bc36 | 3727 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
3728 | } |
3729 | ||
3730 | /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */ | |
04a9db79 | 3731 | msleep(50); |
7359d482 | 3732 | hprt0 &= ~HPRT0_RST; |
95c8bc36 | 3733 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 PZ |
3734 | hsotg->lx_state = DWC2_L0; /* Now back to On state */ |
3735 | break; | |
3736 | ||
3737 | case USB_PORT_FEAT_INDICATOR: | |
3738 | dev_dbg(hsotg->dev, | |
3739 | "SetPortFeature - USB_PORT_FEAT_INDICATOR\n"); | |
3740 | /* Not supported */ | |
3741 | break; | |
3742 | ||
96d480e6 JL |
3743 | case USB_PORT_FEAT_TEST: |
3744 | hprt0 = dwc2_read_hprt0(hsotg); | |
3745 | dev_dbg(hsotg->dev, | |
3746 | "SetPortFeature - USB_PORT_FEAT_TEST\n"); | |
3747 | hprt0 &= ~HPRT0_TSTCTL_MASK; | |
3748 | hprt0 |= (windex >> 8) << HPRT0_TSTCTL_SHIFT; | |
95c8bc36 | 3749 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
96d480e6 JL |
3750 | break; |
3751 | ||
7359d482 PZ |
3752 | default: |
3753 | retval = -EINVAL; | |
3754 | dev_err(hsotg->dev, | |
3755 | "SetPortFeature %1xh unknown or unsupported\n", | |
3756 | wvalue); | |
3757 | break; | |
3758 | } | |
3759 | break; | |
3760 | ||
3761 | default: | |
3762 | error: | |
3763 | retval = -EINVAL; | |
3764 | dev_dbg(hsotg->dev, | |
3765 | "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n", | |
3766 | typereq, windex, wvalue); | |
3767 | break; | |
3768 | } | |
3769 | ||
3770 | return retval; | |
3771 | } | |
3772 | ||
3773 | static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port) | |
3774 | { | |
3775 | int retval; | |
3776 | ||
7359d482 PZ |
3777 | if (port != 1) |
3778 | return -EINVAL; | |
3779 | ||
3780 | retval = (hsotg->flags.b.port_connect_status_change || | |
3781 | hsotg->flags.b.port_reset_change || | |
3782 | hsotg->flags.b.port_enable_change || | |
3783 | hsotg->flags.b.port_suspend_change || | |
3784 | hsotg->flags.b.port_over_current_change); | |
3785 | ||
3786 | if (retval) { | |
3787 | dev_dbg(hsotg->dev, | |
3788 | "DWC OTG HCD HUB STATUS DATA: Root port status changed\n"); | |
3789 | dev_dbg(hsotg->dev, " port_connect_status_change: %d\n", | |
3790 | hsotg->flags.b.port_connect_status_change); | |
3791 | dev_dbg(hsotg->dev, " port_reset_change: %d\n", | |
3792 | hsotg->flags.b.port_reset_change); | |
3793 | dev_dbg(hsotg->dev, " port_enable_change: %d\n", | |
3794 | hsotg->flags.b.port_enable_change); | |
3795 | dev_dbg(hsotg->dev, " port_suspend_change: %d\n", | |
3796 | hsotg->flags.b.port_suspend_change); | |
3797 | dev_dbg(hsotg->dev, " port_over_current_change: %d\n", | |
3798 | hsotg->flags.b.port_over_current_change); | |
3799 | } | |
3800 | ||
3801 | return retval; | |
3802 | } | |
3803 | ||
3804 | int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) | |
3805 | { | |
95c8bc36 | 3806 | u32 hfnum = dwc2_readl(hsotg->regs + HFNUM); |
7359d482 PZ |
3807 | |
3808 | #ifdef DWC2_DEBUG_SOF | |
3809 | dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n", | |
d6ec53e0 | 3810 | (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT); |
7359d482 | 3811 | #endif |
d6ec53e0 | 3812 | return (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; |
7359d482 PZ |
3813 | } |
3814 | ||
fae4e826 DA |
3815 | int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us) |
3816 | { | |
3817 | u32 hprt = dwc2_readl(hsotg->regs + HPRT0); | |
3818 | u32 hfir = dwc2_readl(hsotg->regs + HFIR); | |
3819 | u32 hfnum = dwc2_readl(hsotg->regs + HFNUM); | |
3820 | unsigned int us_per_frame; | |
3821 | unsigned int frame_number; | |
3822 | unsigned int remaining; | |
3823 | unsigned int interval; | |
3824 | unsigned int phy_clks; | |
3825 | ||
3826 | /* High speed has 125 us per (micro) frame; others are 1 ms per */ | |
3827 | us_per_frame = (hprt & HPRT0_SPD_MASK) ? 1000 : 125; | |
3828 | ||
3829 | /* Extract fields */ | |
3830 | frame_number = (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; | |
3831 | remaining = (hfnum & HFNUM_FRREM_MASK) >> HFNUM_FRREM_SHIFT; | |
3832 | interval = (hfir & HFIR_FRINT_MASK) >> HFIR_FRINT_SHIFT; | |
3833 | ||
3834 | /* | |
3835 | * Number of phy clocks since the last tick of the frame number after | |
3836 | * "us" has passed. | |
3837 | */ | |
3838 | phy_clks = (interval - remaining) + | |
3839 | DIV_ROUND_UP(interval * us, us_per_frame); | |
3840 | ||
3841 | return dwc2_frame_num_inc(frame_number, phy_clks / interval); | |
3842 | } | |
3843 | ||
7359d482 PZ |
3844 | int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg) |
3845 | { | |
6bf2e2a5 | 3846 | return hsotg->op_state == OTG_STATE_B_HOST; |
7359d482 PZ |
3847 | } |
3848 | ||
3849 | static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg, | |
3850 | int iso_desc_count, | |
3851 | gfp_t mem_flags) | |
3852 | { | |
3853 | struct dwc2_hcd_urb *urb; | |
3854 | u32 size = sizeof(*urb) + iso_desc_count * | |
3855 | sizeof(struct dwc2_hcd_iso_packet_desc); | |
3856 | ||
3857 | urb = kzalloc(size, mem_flags); | |
3858 | if (urb) | |
3859 | urb->packet_count = iso_desc_count; | |
3860 | return urb; | |
3861 | } | |
3862 | ||
3863 | static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg, | |
3864 | struct dwc2_hcd_urb *urb, u8 dev_addr, | |
3865 | u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps) | |
3866 | { | |
b49977a6 MK |
3867 | if (dbg_perio() || |
3868 | ep_type == USB_ENDPOINT_XFER_BULK || | |
3869 | ep_type == USB_ENDPOINT_XFER_CONTROL) | |
3870 | dev_vdbg(hsotg->dev, | |
3871 | "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n", | |
3872 | dev_addr, ep_num, ep_dir, ep_type, mps); | |
7359d482 PZ |
3873 | urb->pipe_info.dev_addr = dev_addr; |
3874 | urb->pipe_info.ep_num = ep_num; | |
3875 | urb->pipe_info.pipe_type = ep_type; | |
3876 | urb->pipe_info.pipe_dir = ep_dir; | |
3877 | urb->pipe_info.mps = mps; | |
3878 | } | |
3879 | ||
3880 | /* | |
3881 | * NOTE: This function will be removed once the peripheral controller code | |
3882 | * is integrated and the driver is stable | |
3883 | */ | |
3884 | void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg) | |
3885 | { | |
3886 | #ifdef DEBUG | |
3887 | struct dwc2_host_chan *chan; | |
3888 | struct dwc2_hcd_urb *urb; | |
3889 | struct dwc2_qtd *qtd; | |
3890 | int num_channels; | |
3891 | u32 np_tx_status; | |
3892 | u32 p_tx_status; | |
3893 | int i; | |
3894 | ||
bea8e86c | 3895 | num_channels = hsotg->params.host_channels; |
7359d482 PZ |
3896 | dev_dbg(hsotg->dev, "\n"); |
3897 | dev_dbg(hsotg->dev, | |
3898 | "************************************************************\n"); | |
3899 | dev_dbg(hsotg->dev, "HCD State:\n"); | |
3900 | dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels); | |
3901 | ||
3902 | for (i = 0; i < num_channels; i++) { | |
3903 | chan = hsotg->hc_ptr_array[i]; | |
3904 | dev_dbg(hsotg->dev, " Channel %d:\n", i); | |
3905 | dev_dbg(hsotg->dev, | |
3906 | " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", | |
3907 | chan->dev_addr, chan->ep_num, chan->ep_is_in); | |
3908 | dev_dbg(hsotg->dev, " speed: %d\n", chan->speed); | |
3909 | dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); | |
3910 | dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet); | |
3911 | dev_dbg(hsotg->dev, " data_pid_start: %d\n", | |
3912 | chan->data_pid_start); | |
3913 | dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count); | |
3914 | dev_dbg(hsotg->dev, " xfer_started: %d\n", | |
3915 | chan->xfer_started); | |
3916 | dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); | |
3917 | dev_dbg(hsotg->dev, " xfer_dma: %08lx\n", | |
3918 | (unsigned long)chan->xfer_dma); | |
3919 | dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); | |
3920 | dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count); | |
3921 | dev_dbg(hsotg->dev, " halt_on_queue: %d\n", | |
3922 | chan->halt_on_queue); | |
3923 | dev_dbg(hsotg->dev, " halt_pending: %d\n", | |
3924 | chan->halt_pending); | |
3925 | dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); | |
3926 | dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split); | |
3927 | dev_dbg(hsotg->dev, " complete_split: %d\n", | |
3928 | chan->complete_split); | |
3929 | dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr); | |
3930 | dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port); | |
3931 | dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos); | |
3932 | dev_dbg(hsotg->dev, " requests: %d\n", chan->requests); | |
3933 | dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); | |
3934 | ||
3935 | if (chan->xfer_started) { | |
3936 | u32 hfnum, hcchar, hctsiz, hcint, hcintmsk; | |
3937 | ||
95c8bc36 AS |
3938 | hfnum = dwc2_readl(hsotg->regs + HFNUM); |
3939 | hcchar = dwc2_readl(hsotg->regs + HCCHAR(i)); | |
3940 | hctsiz = dwc2_readl(hsotg->regs + HCTSIZ(i)); | |
3941 | hcint = dwc2_readl(hsotg->regs + HCINT(i)); | |
3942 | hcintmsk = dwc2_readl(hsotg->regs + HCINTMSK(i)); | |
7359d482 PZ |
3943 | dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum); |
3944 | dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar); | |
3945 | dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz); | |
3946 | dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint); | |
3947 | dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk); | |
3948 | } | |
3949 | ||
3950 | if (!(chan->xfer_started && chan->qh)) | |
3951 | continue; | |
3952 | ||
3953 | list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) { | |
3954 | if (!qtd->in_process) | |
3955 | break; | |
3956 | urb = qtd->urb; | |
3957 | dev_dbg(hsotg->dev, " URB Info:\n"); | |
3958 | dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n", | |
3959 | qtd, urb); | |
3960 | if (urb) { | |
3961 | dev_dbg(hsotg->dev, | |
3962 | " Dev: %d, EP: %d %s\n", | |
3963 | dwc2_hcd_get_dev_addr(&urb->pipe_info), | |
3964 | dwc2_hcd_get_ep_num(&urb->pipe_info), | |
3965 | dwc2_hcd_is_pipe_in(&urb->pipe_info) ? | |
3966 | "IN" : "OUT"); | |
3967 | dev_dbg(hsotg->dev, | |
3968 | " Max packet size: %d\n", | |
3969 | dwc2_hcd_get_mps(&urb->pipe_info)); | |
3970 | dev_dbg(hsotg->dev, | |
3971 | " transfer_buffer: %p\n", | |
3972 | urb->buf); | |
157dfaac PZ |
3973 | dev_dbg(hsotg->dev, |
3974 | " transfer_dma: %08lx\n", | |
3975 | (unsigned long)urb->dma); | |
7359d482 PZ |
3976 | dev_dbg(hsotg->dev, |
3977 | " transfer_buffer_length: %d\n", | |
3978 | urb->length); | |
3979 | dev_dbg(hsotg->dev, " actual_length: %d\n", | |
3980 | urb->actual_length); | |
3981 | } | |
3982 | } | |
3983 | } | |
3984 | ||
3985 | dev_dbg(hsotg->dev, " non_periodic_channels: %d\n", | |
3986 | hsotg->non_periodic_channels); | |
3987 | dev_dbg(hsotg->dev, " periodic_channels: %d\n", | |
3988 | hsotg->periodic_channels); | |
3989 | dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs); | |
95c8bc36 | 3990 | np_tx_status = dwc2_readl(hsotg->regs + GNPTXSTS); |
7359d482 | 3991 | dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n", |
d6ec53e0 | 3992 | (np_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT); |
7359d482 | 3993 | dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n", |
d6ec53e0 | 3994 | (np_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT); |
95c8bc36 | 3995 | p_tx_status = dwc2_readl(hsotg->regs + HPTXSTS); |
7359d482 | 3996 | dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n", |
d6ec53e0 | 3997 | (p_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT); |
7359d482 | 3998 | dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n", |
d6ec53e0 | 3999 | (p_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT); |
7359d482 PZ |
4000 | dwc2_hcd_dump_frrem(hsotg); |
4001 | dwc2_dump_global_registers(hsotg); | |
4002 | dwc2_dump_host_registers(hsotg); | |
4003 | dev_dbg(hsotg->dev, | |
4004 | "************************************************************\n"); | |
4005 | dev_dbg(hsotg->dev, "\n"); | |
4006 | #endif | |
4007 | } | |
4008 | ||
4009 | /* | |
4010 | * NOTE: This function will be removed once the peripheral controller code | |
4011 | * is integrated and the driver is stable | |
4012 | */ | |
4013 | void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg) | |
4014 | { | |
4015 | #ifdef DWC2_DUMP_FRREM | |
4016 | dev_dbg(hsotg->dev, "Frame remaining at SOF:\n"); | |
4017 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4018 | hsotg->frrem_samples, hsotg->frrem_accum, | |
4019 | hsotg->frrem_samples > 0 ? | |
4020 | hsotg->frrem_accum / hsotg->frrem_samples : 0); | |
4021 | dev_dbg(hsotg->dev, "\n"); | |
4022 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n"); | |
4023 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4024 | hsotg->hfnum_7_samples, | |
4025 | hsotg->hfnum_7_frrem_accum, | |
4026 | hsotg->hfnum_7_samples > 0 ? | |
4027 | hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0); | |
4028 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n"); | |
4029 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4030 | hsotg->hfnum_0_samples, | |
4031 | hsotg->hfnum_0_frrem_accum, | |
4032 | hsotg->hfnum_0_samples > 0 ? | |
4033 | hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0); | |
4034 | dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n"); | |
4035 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4036 | hsotg->hfnum_other_samples, | |
4037 | hsotg->hfnum_other_frrem_accum, | |
4038 | hsotg->hfnum_other_samples > 0 ? | |
4039 | hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples : | |
4040 | 0); | |
4041 | dev_dbg(hsotg->dev, "\n"); | |
4042 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n"); | |
4043 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4044 | hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a, | |
4045 | hsotg->hfnum_7_samples_a > 0 ? | |
4046 | hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0); | |
4047 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n"); | |
4048 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4049 | hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a, | |
4050 | hsotg->hfnum_0_samples_a > 0 ? | |
4051 | hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0); | |
4052 | dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n"); | |
4053 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4054 | hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a, | |
4055 | hsotg->hfnum_other_samples_a > 0 ? | |
4056 | hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a | |
4057 | : 0); | |
4058 | dev_dbg(hsotg->dev, "\n"); | |
4059 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n"); | |
4060 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4061 | hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b, | |
4062 | hsotg->hfnum_7_samples_b > 0 ? | |
4063 | hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0); | |
4064 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n"); | |
4065 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4066 | hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b, | |
4067 | (hsotg->hfnum_0_samples_b > 0) ? | |
4068 | hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0); | |
4069 | dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n"); | |
4070 | dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n", | |
4071 | hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b, | |
4072 | (hsotg->hfnum_other_samples_b > 0) ? | |
4073 | hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b | |
4074 | : 0); | |
4075 | #endif | |
4076 | } | |
4077 | ||
4078 | struct wrapper_priv_data { | |
4079 | struct dwc2_hsotg *hsotg; | |
4080 | }; | |
4081 | ||
4082 | /* Gets the dwc2_hsotg from a usb_hcd */ | |
4083 | static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd) | |
4084 | { | |
4085 | struct wrapper_priv_data *p; | |
4086 | ||
9da51974 | 4087 | p = (struct wrapper_priv_data *)&hcd->hcd_priv; |
7359d482 PZ |
4088 | return p->hsotg; |
4089 | } | |
4090 | ||
9f9f09b0 DA |
4091 | /** |
4092 | * dwc2_host_get_tt_info() - Get the dwc2_tt associated with context | |
4093 | * | |
4094 | * This will get the dwc2_tt structure (and ttport) associated with the given | |
4095 | * context (which is really just a struct urb pointer). | |
4096 | * | |
4097 | * The first time this is called for a given TT we allocate memory for our | |
4098 | * structure. When everyone is done and has called dwc2_host_put_tt_info() | |
4099 | * then the refcount for the structure will go to 0 and we'll free it. | |
4100 | * | |
4101 | * @hsotg: The HCD state structure for the DWC OTG controller. | |
4102 | * @qh: The QH structure. | |
4103 | * @context: The priv pointer from a struct dwc2_hcd_urb. | |
4104 | * @mem_flags: Flags for allocating memory. | |
4105 | * @ttport: We'll return this device's port number here. That's used to | |
4106 | * reference into the bitmap if we're on a multi_tt hub. | |
4107 | * | |
4108 | * Return: a pointer to a struct dwc2_tt. Don't forget to call | |
4109 | * dwc2_host_put_tt_info()! Returns NULL upon memory alloc failure. | |
4110 | */ | |
4111 | ||
4112 | struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, void *context, | |
4113 | gfp_t mem_flags, int *ttport) | |
4114 | { | |
4115 | struct urb *urb = context; | |
4116 | struct dwc2_tt *dwc_tt = NULL; | |
4117 | ||
4118 | if (urb->dev->tt) { | |
4119 | *ttport = urb->dev->ttport; | |
4120 | ||
4121 | dwc_tt = urb->dev->tt->hcpriv; | |
9da51974 | 4122 | if (!dwc_tt) { |
9f9f09b0 DA |
4123 | size_t bitmap_size; |
4124 | ||
4125 | /* | |
4126 | * For single_tt we need one schedule. For multi_tt | |
4127 | * we need one per port. | |
4128 | */ | |
4129 | bitmap_size = DWC2_ELEMENTS_PER_LS_BITMAP * | |
4130 | sizeof(dwc_tt->periodic_bitmaps[0]); | |
4131 | if (urb->dev->tt->multi) | |
4132 | bitmap_size *= urb->dev->tt->hub->maxchild; | |
4133 | ||
4134 | dwc_tt = kzalloc(sizeof(*dwc_tt) + bitmap_size, | |
4135 | mem_flags); | |
9da51974 | 4136 | if (!dwc_tt) |
9f9f09b0 DA |
4137 | return NULL; |
4138 | ||
4139 | dwc_tt->usb_tt = urb->dev->tt; | |
4140 | dwc_tt->usb_tt->hcpriv = dwc_tt; | |
4141 | } | |
4142 | ||
4143 | dwc_tt->refcount++; | |
4144 | } | |
4145 | ||
4146 | return dwc_tt; | |
4147 | } | |
4148 | ||
4149 | /** | |
4150 | * dwc2_host_put_tt_info() - Put the dwc2_tt from dwc2_host_get_tt_info() | |
4151 | * | |
4152 | * Frees resources allocated by dwc2_host_get_tt_info() if all current holders | |
4153 | * of the structure are done. | |
4154 | * | |
4155 | * It's OK to call this with NULL. | |
4156 | * | |
4157 | * @hsotg: The HCD state structure for the DWC OTG controller. | |
4158 | * @dwc_tt: The pointer returned by dwc2_host_get_tt_info. | |
4159 | */ | |
4160 | void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg, struct dwc2_tt *dwc_tt) | |
4161 | { | |
4162 | /* Model kfree and make put of NULL a no-op */ | |
9da51974 | 4163 | if (!dwc_tt) |
9f9f09b0 DA |
4164 | return; |
4165 | ||
4166 | WARN_ON(dwc_tt->refcount < 1); | |
4167 | ||
4168 | dwc_tt->refcount--; | |
4169 | if (!dwc_tt->refcount) { | |
4170 | dwc_tt->usb_tt->hcpriv = NULL; | |
4171 | kfree(dwc_tt); | |
4172 | } | |
4173 | } | |
4174 | ||
7359d482 PZ |
4175 | int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context) |
4176 | { | |
4177 | struct urb *urb = context; | |
4178 | ||
4179 | return urb->dev->speed; | |
4180 | } | |
4181 | ||
4182 | static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw, | |
4183 | struct urb *urb) | |
4184 | { | |
4185 | struct usb_bus *bus = hcd_to_bus(hcd); | |
4186 | ||
4187 | if (urb->interval) | |
4188 | bus->bandwidth_allocated += bw / urb->interval; | |
4189 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
4190 | bus->bandwidth_isoc_reqs++; | |
4191 | else | |
4192 | bus->bandwidth_int_reqs++; | |
4193 | } | |
4194 | ||
4195 | static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw, | |
4196 | struct urb *urb) | |
4197 | { | |
4198 | struct usb_bus *bus = hcd_to_bus(hcd); | |
4199 | ||
4200 | if (urb->interval) | |
4201 | bus->bandwidth_allocated -= bw / urb->interval; | |
4202 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
4203 | bus->bandwidth_isoc_reqs--; | |
4204 | else | |
4205 | bus->bandwidth_int_reqs--; | |
4206 | } | |
4207 | ||
4208 | /* | |
4209 | * Sets the final status of an URB and returns it to the upper layer. Any | |
4210 | * required cleanup of the URB is performed. | |
4211 | * | |
4212 | * Must be called with interrupt disabled and spinlock held | |
4213 | */ | |
0d012b98 PZ |
4214 | void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, |
4215 | int status) | |
7359d482 | 4216 | { |
0d012b98 | 4217 | struct urb *urb; |
7359d482 PZ |
4218 | int i; |
4219 | ||
0d012b98 PZ |
4220 | if (!qtd) { |
4221 | dev_dbg(hsotg->dev, "## %s: qtd is NULL ##\n", __func__); | |
7359d482 PZ |
4222 | return; |
4223 | } | |
4224 | ||
0d012b98 PZ |
4225 | if (!qtd->urb) { |
4226 | dev_dbg(hsotg->dev, "## %s: qtd->urb is NULL ##\n", __func__); | |
7359d482 PZ |
4227 | return; |
4228 | } | |
4229 | ||
0d012b98 PZ |
4230 | urb = qtd->urb->priv; |
4231 | if (!urb) { | |
4232 | dev_dbg(hsotg->dev, "## %s: urb->priv is NULL ##\n", __func__); | |
4233 | return; | |
4234 | } | |
4235 | ||
4236 | urb->actual_length = dwc2_hcd_urb_get_actual_length(qtd->urb); | |
7359d482 | 4237 | |
b49977a6 MK |
4238 | if (dbg_urb(urb)) |
4239 | dev_vdbg(hsotg->dev, | |
4240 | "%s: urb %p device %d ep %d-%s status %d actual %d\n", | |
4241 | __func__, urb, usb_pipedevice(urb->pipe), | |
4242 | usb_pipeendpoint(urb->pipe), | |
4243 | usb_pipein(urb->pipe) ? "IN" : "OUT", status, | |
4244 | urb->actual_length); | |
7359d482 | 4245 | |
7359d482 | 4246 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
0d012b98 | 4247 | urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb); |
7359d482 PZ |
4248 | for (i = 0; i < urb->number_of_packets; ++i) { |
4249 | urb->iso_frame_desc[i].actual_length = | |
4250 | dwc2_hcd_urb_get_iso_desc_actual_length( | |
0d012b98 | 4251 | qtd->urb, i); |
7359d482 | 4252 | urb->iso_frame_desc[i].status = |
0d012b98 | 4253 | dwc2_hcd_urb_get_iso_desc_status(qtd->urb, i); |
7359d482 PZ |
4254 | } |
4255 | } | |
4256 | ||
fe9b1773 GH |
4257 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) { |
4258 | for (i = 0; i < urb->number_of_packets; i++) | |
4259 | dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n", | |
4260 | i, urb->iso_frame_desc[i].status); | |
4261 | } | |
4262 | ||
7359d482 | 4263 | urb->status = status; |
7359d482 PZ |
4264 | if (!status) { |
4265 | if ((urb->transfer_flags & URB_SHORT_NOT_OK) && | |
4266 | urb->actual_length < urb->transfer_buffer_length) | |
4267 | urb->status = -EREMOTEIO; | |
4268 | } | |
4269 | ||
4270 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || | |
4271 | usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
4272 | struct usb_host_endpoint *ep = urb->ep; | |
4273 | ||
4274 | if (ep) | |
4275 | dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg), | |
4276 | dwc2_hcd_get_ep_bandwidth(hsotg, ep), | |
4277 | urb); | |
4278 | } | |
4279 | ||
c9e1c907 | 4280 | usb_hcd_unlink_urb_from_ep(dwc2_hsotg_to_hcd(hsotg), urb); |
0d012b98 PZ |
4281 | urb->hcpriv = NULL; |
4282 | kfree(qtd->urb); | |
4283 | qtd->urb = NULL; | |
7359d482 | 4284 | |
7359d482 | 4285 | usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status); |
7359d482 PZ |
4286 | } |
4287 | ||
4288 | /* | |
4289 | * Work queue function for starting the HCD when A-Cable is connected | |
4290 | */ | |
4291 | static void dwc2_hcd_start_func(struct work_struct *work) | |
4292 | { | |
4293 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
4294 | start_work.work); | |
4295 | ||
4296 | dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg); | |
4297 | dwc2_host_start(hsotg); | |
4298 | } | |
4299 | ||
4300 | /* | |
4301 | * Reset work queue function | |
4302 | */ | |
4303 | static void dwc2_hcd_reset_func(struct work_struct *work) | |
4304 | { | |
4305 | struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg, | |
4306 | reset_work.work); | |
4a065c7b | 4307 | unsigned long flags; |
7359d482 PZ |
4308 | u32 hprt0; |
4309 | ||
4310 | dev_dbg(hsotg->dev, "USB RESET function called\n"); | |
4a065c7b DA |
4311 | |
4312 | spin_lock_irqsave(&hsotg->lock, flags); | |
4313 | ||
7359d482 PZ |
4314 | hprt0 = dwc2_read_hprt0(hsotg); |
4315 | hprt0 &= ~HPRT0_RST; | |
95c8bc36 | 4316 | dwc2_writel(hprt0, hsotg->regs + HPRT0); |
7359d482 | 4317 | hsotg->flags.b.port_reset_change = 1; |
4a065c7b DA |
4318 | |
4319 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
7359d482 PZ |
4320 | } |
4321 | ||
4322 | /* | |
4323 | * ========================================================================= | |
4324 | * Linux HC Driver Functions | |
4325 | * ========================================================================= | |
4326 | */ | |
4327 | ||
4328 | /* | |
4329 | * Initializes the DWC_otg controller and its root hub and prepares it for host | |
4330 | * mode operation. Activates the root port. Returns 0 on success and a negative | |
4331 | * error code on failure. | |
4332 | */ | |
4333 | static int _dwc2_hcd_start(struct usb_hcd *hcd) | |
4334 | { | |
4335 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4336 | struct usb_bus *bus = hcd_to_bus(hcd); | |
4337 | unsigned long flags; | |
4338 | ||
4339 | dev_dbg(hsotg->dev, "DWC OTG HCD START\n"); | |
4340 | ||
4341 | spin_lock_irqsave(&hsotg->lock, flags); | |
31927b6b | 4342 | hsotg->lx_state = DWC2_L0; |
7359d482 | 4343 | hcd->state = HC_STATE_RUNNING; |
31927b6b | 4344 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
7359d482 PZ |
4345 | |
4346 | if (dwc2_is_device_mode(hsotg)) { | |
4347 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4348 | return 0; /* why 0 ?? */ | |
4349 | } | |
4350 | ||
4351 | dwc2_hcd_reinit(hsotg); | |
4352 | ||
4353 | /* Initialize and connect root hub if one is not already attached */ | |
4354 | if (bus->root_hub) { | |
4355 | dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n"); | |
4356 | /* Inform the HUB driver to resume */ | |
4357 | usb_hcd_resume_root_hub(hcd); | |
4358 | } | |
4359 | ||
4360 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4361 | return 0; | |
4362 | } | |
4363 | ||
4364 | /* | |
4365 | * Halts the DWC_otg host mode operations in a clean manner. USB transfers are | |
4366 | * stopped. | |
4367 | */ | |
4368 | static void _dwc2_hcd_stop(struct usb_hcd *hcd) | |
4369 | { | |
4370 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4371 | unsigned long flags; | |
4372 | ||
5bbf6ce0 GH |
4373 | /* Turn off all host-specific interrupts */ |
4374 | dwc2_disable_host_interrupts(hsotg); | |
4375 | ||
091473ad GH |
4376 | /* Wait for interrupt processing to finish */ |
4377 | synchronize_irq(hcd->irq); | |
4378 | ||
7359d482 | 4379 | spin_lock_irqsave(&hsotg->lock, flags); |
091473ad | 4380 | /* Ensure hcd is disconnected */ |
6a659531 | 4381 | dwc2_hcd_disconnect(hsotg, true); |
7359d482 | 4382 | dwc2_hcd_stop(hsotg); |
31927b6b GH |
4383 | hsotg->lx_state = DWC2_L3; |
4384 | hcd->state = HC_STATE_HALT; | |
4385 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
7359d482 PZ |
4386 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4387 | ||
4388 | usleep_range(1000, 3000); | |
4389 | } | |
4390 | ||
99a65798 GH |
4391 | static int _dwc2_hcd_suspend(struct usb_hcd *hcd) |
4392 | { | |
4393 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
a2a23d3f GH |
4394 | unsigned long flags; |
4395 | int ret = 0; | |
4396 | u32 hprt0; | |
4397 | ||
4398 | spin_lock_irqsave(&hsotg->lock, flags); | |
4399 | ||
f367b72c MD |
4400 | if (dwc2_is_device_mode(hsotg)) |
4401 | goto unlock; | |
4402 | ||
a2a23d3f GH |
4403 | if (hsotg->lx_state != DWC2_L0) |
4404 | goto unlock; | |
4405 | ||
4406 | if (!HCD_HW_ACCESSIBLE(hcd)) | |
4407 | goto unlock; | |
4408 | ||
866932e2 JS |
4409 | if (hsotg->op_state == OTG_STATE_B_PERIPHERAL) |
4410 | goto unlock; | |
4411 | ||
bea8e86c | 4412 | if (!hsotg->params.hibernation) |
a2a23d3f GH |
4413 | goto skip_power_saving; |
4414 | ||
4415 | /* | |
4416 | * Drive USB suspend and disable port Power | |
4417 | * if usb bus is not suspended. | |
4418 | */ | |
4419 | if (!hsotg->bus_suspended) { | |
4420 | hprt0 = dwc2_read_hprt0(hsotg); | |
4421 | hprt0 |= HPRT0_SUSP; | |
4422 | hprt0 &= ~HPRT0_PWR; | |
4423 | dwc2_writel(hprt0, hsotg->regs + HPRT0); | |
4424 | } | |
4425 | ||
4426 | /* Enter hibernation */ | |
4427 | ret = dwc2_enter_hibernation(hsotg); | |
4428 | if (ret) { | |
4429 | if (ret != -ENOTSUPP) | |
4430 | dev_err(hsotg->dev, | |
4431 | "enter hibernation failed\n"); | |
4432 | goto skip_power_saving; | |
4433 | } | |
4434 | ||
4435 | /* Ask phy to be suspended */ | |
4436 | if (!IS_ERR_OR_NULL(hsotg->uphy)) { | |
4437 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4438 | usb_phy_set_suspend(hsotg->uphy, true); | |
4439 | spin_lock_irqsave(&hsotg->lock, flags); | |
4440 | } | |
4441 | ||
4442 | /* After entering hibernation, hardware is no more accessible */ | |
4443 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
99a65798 | 4444 | |
a2a23d3f | 4445 | skip_power_saving: |
99a65798 | 4446 | hsotg->lx_state = DWC2_L2; |
a2a23d3f GH |
4447 | unlock: |
4448 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4449 | ||
4450 | return ret; | |
99a65798 GH |
4451 | } |
4452 | ||
4453 | static int _dwc2_hcd_resume(struct usb_hcd *hcd) | |
4454 | { | |
4455 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
a2a23d3f GH |
4456 | unsigned long flags; |
4457 | int ret = 0; | |
4458 | ||
4459 | spin_lock_irqsave(&hsotg->lock, flags); | |
4460 | ||
f367b72c MD |
4461 | if (dwc2_is_device_mode(hsotg)) |
4462 | goto unlock; | |
4463 | ||
a2a23d3f GH |
4464 | if (hsotg->lx_state != DWC2_L2) |
4465 | goto unlock; | |
4466 | ||
bea8e86c | 4467 | if (!hsotg->params.hibernation) { |
a2a23d3f GH |
4468 | hsotg->lx_state = DWC2_L0; |
4469 | goto unlock; | |
4470 | } | |
4471 | ||
4472 | /* | |
4473 | * Set HW accessible bit before powering on the controller | |
4474 | * since an interrupt may rise. | |
4475 | */ | |
4476 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
4477 | ||
4478 | /* | |
4479 | * Enable power if not already done. | |
4480 | * This must not be spinlocked since duration | |
4481 | * of this call is unknown. | |
4482 | */ | |
4483 | if (!IS_ERR_OR_NULL(hsotg->uphy)) { | |
4484 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4485 | usb_phy_set_suspend(hsotg->uphy, false); | |
4486 | spin_lock_irqsave(&hsotg->lock, flags); | |
4487 | } | |
4488 | ||
4489 | /* Exit hibernation */ | |
4490 | ret = dwc2_exit_hibernation(hsotg, true); | |
4491 | if (ret && (ret != -ENOTSUPP)) | |
4492 | dev_err(hsotg->dev, "exit hibernation failed\n"); | |
99a65798 GH |
4493 | |
4494 | hsotg->lx_state = DWC2_L0; | |
a2a23d3f GH |
4495 | |
4496 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4497 | ||
4498 | if (hsotg->bus_suspended) { | |
4499 | spin_lock_irqsave(&hsotg->lock, flags); | |
4500 | hsotg->flags.b.port_suspend_change = 1; | |
4501 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4502 | dwc2_port_resume(hsotg); | |
4503 | } else { | |
5634e016 GH |
4504 | /* Wait for controller to correctly update D+/D- level */ |
4505 | usleep_range(3000, 5000); | |
4506 | ||
a2a23d3f GH |
4507 | /* |
4508 | * Clear Port Enable and Port Status changes. | |
4509 | * Enable Port Power. | |
4510 | */ | |
4511 | dwc2_writel(HPRT0_PWR | HPRT0_CONNDET | | |
4512 | HPRT0_ENACHG, hsotg->regs + HPRT0); | |
4513 | /* Wait for controller to detect Port Connect */ | |
5634e016 | 4514 | usleep_range(5000, 7000); |
a2a23d3f GH |
4515 | } |
4516 | ||
4517 | return ret; | |
4518 | unlock: | |
4519 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4520 | ||
4521 | return ret; | |
99a65798 GH |
4522 | } |
4523 | ||
7359d482 PZ |
4524 | /* Returns the current frame number */ |
4525 | static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd) | |
4526 | { | |
4527 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4528 | ||
4529 | return dwc2_hcd_get_frame_number(hsotg); | |
4530 | } | |
4531 | ||
4532 | static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb, | |
4533 | char *fn_name) | |
4534 | { | |
4535 | #ifdef VERBOSE_DEBUG | |
4536 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
efe357f4 NMG |
4537 | char *pipetype = NULL; |
4538 | char *speed = NULL; | |
7359d482 PZ |
4539 | |
4540 | dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb); | |
4541 | dev_vdbg(hsotg->dev, " Device address: %d\n", | |
4542 | usb_pipedevice(urb->pipe)); | |
4543 | dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n", | |
4544 | usb_pipeendpoint(urb->pipe), | |
4545 | usb_pipein(urb->pipe) ? "IN" : "OUT"); | |
4546 | ||
4547 | switch (usb_pipetype(urb->pipe)) { | |
4548 | case PIPE_CONTROL: | |
4549 | pipetype = "CONTROL"; | |
4550 | break; | |
4551 | case PIPE_BULK: | |
4552 | pipetype = "BULK"; | |
4553 | break; | |
4554 | case PIPE_INTERRUPT: | |
4555 | pipetype = "INTERRUPT"; | |
4556 | break; | |
4557 | case PIPE_ISOCHRONOUS: | |
4558 | pipetype = "ISOCHRONOUS"; | |
4559 | break; | |
7359d482 PZ |
4560 | } |
4561 | ||
4562 | dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype, | |
4563 | usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ? | |
4564 | "IN" : "OUT"); | |
4565 | ||
4566 | switch (urb->dev->speed) { | |
4567 | case USB_SPEED_HIGH: | |
4568 | speed = "HIGH"; | |
4569 | break; | |
4570 | case USB_SPEED_FULL: | |
4571 | speed = "FULL"; | |
4572 | break; | |
4573 | case USB_SPEED_LOW: | |
4574 | speed = "LOW"; | |
4575 | break; | |
4576 | default: | |
4577 | speed = "UNKNOWN"; | |
4578 | break; | |
4579 | } | |
4580 | ||
4581 | dev_vdbg(hsotg->dev, " Speed: %s\n", speed); | |
4582 | dev_vdbg(hsotg->dev, " Max packet size: %d\n", | |
4583 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))); | |
4584 | dev_vdbg(hsotg->dev, " Data buffer length: %d\n", | |
4585 | urb->transfer_buffer_length); | |
157dfaac PZ |
4586 | dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n", |
4587 | urb->transfer_buffer, (unsigned long)urb->transfer_dma); | |
4588 | dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n", | |
4589 | urb->setup_packet, (unsigned long)urb->setup_dma); | |
7359d482 PZ |
4590 | dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval); |
4591 | ||
4592 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
4593 | int i; | |
4594 | ||
4595 | for (i = 0; i < urb->number_of_packets; i++) { | |
4596 | dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i); | |
4597 | dev_vdbg(hsotg->dev, " offset: %d, length %d\n", | |
4598 | urb->iso_frame_desc[i].offset, | |
4599 | urb->iso_frame_desc[i].length); | |
4600 | } | |
4601 | } | |
4602 | #endif | |
4603 | } | |
4604 | ||
4605 | /* | |
4606 | * Starts processing a USB transfer request specified by a USB Request Block | |
4607 | * (URB). mem_flags indicates the type of memory allocation to use while | |
4608 | * processing this URB. | |
4609 | */ | |
4610 | static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
4611 | gfp_t mem_flags) | |
4612 | { | |
4613 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4614 | struct usb_host_endpoint *ep = urb->ep; | |
4615 | struct dwc2_hcd_urb *dwc2_urb; | |
4616 | int i; | |
c9e1c907 | 4617 | int retval; |
7359d482 | 4618 | int alloc_bandwidth = 0; |
7359d482 PZ |
4619 | u8 ep_type = 0; |
4620 | u32 tflags = 0; | |
4621 | void *buf; | |
4622 | unsigned long flags; | |
b58e6cee MYK |
4623 | struct dwc2_qh *qh; |
4624 | bool qh_allocated = false; | |
b5a468a6 | 4625 | struct dwc2_qtd *qtd; |
7359d482 | 4626 | |
b49977a6 MK |
4627 | if (dbg_urb(urb)) { |
4628 | dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n"); | |
4629 | dwc2_dump_urb_info(hcd, urb, "urb_enqueue"); | |
4630 | } | |
7359d482 | 4631 | |
9da51974 | 4632 | if (!ep) |
7359d482 PZ |
4633 | return -EINVAL; |
4634 | ||
4635 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS || | |
4636 | usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
4637 | spin_lock_irqsave(&hsotg->lock, flags); | |
4638 | if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep)) | |
4639 | alloc_bandwidth = 1; | |
4640 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4641 | } | |
4642 | ||
4643 | switch (usb_pipetype(urb->pipe)) { | |
4644 | case PIPE_CONTROL: | |
4645 | ep_type = USB_ENDPOINT_XFER_CONTROL; | |
4646 | break; | |
4647 | case PIPE_ISOCHRONOUS: | |
4648 | ep_type = USB_ENDPOINT_XFER_ISOC; | |
4649 | break; | |
4650 | case PIPE_BULK: | |
4651 | ep_type = USB_ENDPOINT_XFER_BULK; | |
4652 | break; | |
4653 | case PIPE_INTERRUPT: | |
4654 | ep_type = USB_ENDPOINT_XFER_INT; | |
4655 | break; | |
7359d482 PZ |
4656 | } |
4657 | ||
4658 | dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets, | |
4659 | mem_flags); | |
4660 | if (!dwc2_urb) | |
4661 | return -ENOMEM; | |
4662 | ||
4663 | dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe), | |
4664 | usb_pipeendpoint(urb->pipe), ep_type, | |
4665 | usb_pipein(urb->pipe), | |
4666 | usb_maxpacket(urb->dev, urb->pipe, | |
4667 | !(usb_pipein(urb->pipe)))); | |
4668 | ||
4669 | buf = urb->transfer_buffer; | |
25a49445 | 4670 | |
7359d482 | 4671 | if (hcd->self.uses_dma) { |
25a49445 PZ |
4672 | if (!buf && (urb->transfer_dma & 3)) { |
4673 | dev_err(hsotg->dev, | |
4674 | "%s: unaligned transfer with no transfer_buffer", | |
4675 | __func__); | |
4676 | retval = -EINVAL; | |
33ad261a | 4677 | goto fail0; |
25a49445 | 4678 | } |
7359d482 PZ |
4679 | } |
4680 | ||
4681 | if (!(urb->transfer_flags & URB_NO_INTERRUPT)) | |
4682 | tflags |= URB_GIVEBACK_ASAP; | |
4683 | if (urb->transfer_flags & URB_ZERO_PACKET) | |
4684 | tflags |= URB_SEND_ZERO_PACKET; | |
4685 | ||
4686 | dwc2_urb->priv = urb; | |
4687 | dwc2_urb->buf = buf; | |
4688 | dwc2_urb->dma = urb->transfer_dma; | |
4689 | dwc2_urb->length = urb->transfer_buffer_length; | |
4690 | dwc2_urb->setup_packet = urb->setup_packet; | |
4691 | dwc2_urb->setup_dma = urb->setup_dma; | |
4692 | dwc2_urb->flags = tflags; | |
4693 | dwc2_urb->interval = urb->interval; | |
4694 | dwc2_urb->status = -EINPROGRESS; | |
4695 | ||
4696 | for (i = 0; i < urb->number_of_packets; ++i) | |
4697 | dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i, | |
4698 | urb->iso_frame_desc[i].offset, | |
4699 | urb->iso_frame_desc[i].length); | |
4700 | ||
4701 | urb->hcpriv = dwc2_urb; | |
9da51974 | 4702 | qh = (struct dwc2_qh *)ep->hcpriv; |
b58e6cee MYK |
4703 | /* Create QH for the endpoint if it doesn't exist */ |
4704 | if (!qh) { | |
4705 | qh = dwc2_hcd_qh_create(hsotg, dwc2_urb, mem_flags); | |
4706 | if (!qh) { | |
4707 | retval = -ENOMEM; | |
4708 | goto fail0; | |
4709 | } | |
4710 | ep->hcpriv = qh; | |
4711 | qh_allocated = true; | |
4712 | } | |
c9e1c907 | 4713 | |
b5a468a6 MYK |
4714 | qtd = kzalloc(sizeof(*qtd), mem_flags); |
4715 | if (!qtd) { | |
4716 | retval = -ENOMEM; | |
4717 | goto fail1; | |
4718 | } | |
4719 | ||
c9e1c907 PZ |
4720 | spin_lock_irqsave(&hsotg->lock, flags); |
4721 | retval = usb_hcd_link_urb_to_ep(hcd, urb); | |
c9e1c907 | 4722 | if (retval) |
b5a468a6 | 4723 | goto fail2; |
c9e1c907 | 4724 | |
b5a468a6 | 4725 | retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, qh, qtd); |
c9e1c907 | 4726 | if (retval) |
b5a468a6 | 4727 | goto fail3; |
c9e1c907 PZ |
4728 | |
4729 | if (alloc_bandwidth) { | |
c9e1c907 PZ |
4730 | dwc2_allocate_bus_bandwidth(hcd, |
4731 | dwc2_hcd_get_ep_bandwidth(hsotg, ep), | |
4732 | urb); | |
7359d482 PZ |
4733 | } |
4734 | ||
33ad261a GH |
4735 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4736 | ||
c9e1c907 PZ |
4737 | return 0; |
4738 | ||
b5a468a6 | 4739 | fail3: |
c9e1c907 PZ |
4740 | dwc2_urb->priv = NULL; |
4741 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
16e80218 DA |
4742 | if (qh_allocated && qh->channel && qh->channel->qh == qh) |
4743 | qh->channel->qh = NULL; | |
b5a468a6 | 4744 | fail2: |
33ad261a | 4745 | spin_unlock_irqrestore(&hsotg->lock, flags); |
c9e1c907 | 4746 | urb->hcpriv = NULL; |
b5a468a6 | 4747 | kfree(qtd); |
b0d65902 | 4748 | qtd = NULL; |
b5a468a6 | 4749 | fail1: |
b58e6cee MYK |
4750 | if (qh_allocated) { |
4751 | struct dwc2_qtd *qtd2, *qtd2_tmp; | |
4752 | ||
4753 | ep->hcpriv = NULL; | |
4754 | dwc2_hcd_qh_unlink(hsotg, qh); | |
4755 | /* Free each QTD in the QH's QTD list */ | |
4756 | list_for_each_entry_safe(qtd2, qtd2_tmp, &qh->qtd_list, | |
9da51974 | 4757 | qtd_list_entry) |
b58e6cee MYK |
4758 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd2, qh); |
4759 | dwc2_hcd_qh_free(hsotg, qh); | |
4760 | } | |
33ad261a | 4761 | fail0: |
c9e1c907 PZ |
4762 | kfree(dwc2_urb); |
4763 | ||
7359d482 PZ |
4764 | return retval; |
4765 | } | |
4766 | ||
4767 | /* | |
4768 | * Aborts/cancels a USB transfer request. Always returns 0 to indicate success. | |
4769 | */ | |
4770 | static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, | |
4771 | int status) | |
4772 | { | |
4773 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
c9e1c907 | 4774 | int rc; |
7359d482 PZ |
4775 | unsigned long flags; |
4776 | ||
4777 | dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n"); | |
4778 | dwc2_dump_urb_info(hcd, urb, "urb_dequeue"); | |
4779 | ||
4780 | spin_lock_irqsave(&hsotg->lock, flags); | |
4781 | ||
c9e1c907 PZ |
4782 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
4783 | if (rc) | |
4784 | goto out; | |
4785 | ||
7359d482 PZ |
4786 | if (!urb->hcpriv) { |
4787 | dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n"); | |
4788 | goto out; | |
4789 | } | |
4790 | ||
4791 | rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv); | |
4792 | ||
c9e1c907 PZ |
4793 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4794 | ||
7359d482 PZ |
4795 | kfree(urb->hcpriv); |
4796 | urb->hcpriv = NULL; | |
4797 | ||
4798 | /* Higher layer software sets URB status */ | |
4799 | spin_unlock(&hsotg->lock); | |
4800 | usb_hcd_giveback_urb(hcd, urb, status); | |
4801 | spin_lock(&hsotg->lock); | |
4802 | ||
4803 | dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n"); | |
4804 | dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status); | |
4805 | out: | |
4806 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4807 | ||
4808 | return rc; | |
4809 | } | |
4810 | ||
4811 | /* | |
4812 | * Frees resources in the DWC_otg controller related to a given endpoint. Also | |
4813 | * clears state in the HCD related to the endpoint. Any URBs for the endpoint | |
4814 | * must already be dequeued. | |
4815 | */ | |
4816 | static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd, | |
4817 | struct usb_host_endpoint *ep) | |
4818 | { | |
4819 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4820 | ||
4821 | dev_dbg(hsotg->dev, | |
4822 | "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n", | |
4823 | ep->desc.bEndpointAddress, ep->hcpriv); | |
4824 | dwc2_hcd_endpoint_disable(hsotg, ep, 250); | |
4825 | } | |
4826 | ||
4827 | /* | |
4828 | * Resets endpoint specific parameter values, in current version used to reset | |
4829 | * the data toggle (as a WA). This function can be called from usb_clear_halt | |
4830 | * routine. | |
4831 | */ | |
4832 | static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd, | |
4833 | struct usb_host_endpoint *ep) | |
4834 | { | |
4835 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
7359d482 PZ |
4836 | unsigned long flags; |
4837 | ||
4838 | dev_dbg(hsotg->dev, | |
4839 | "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n", | |
4840 | ep->desc.bEndpointAddress); | |
4841 | ||
7359d482 | 4842 | spin_lock_irqsave(&hsotg->lock, flags); |
7359d482 | 4843 | dwc2_hcd_endpoint_reset(hsotg, ep); |
7359d482 PZ |
4844 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4845 | } | |
4846 | ||
4847 | /* | |
4848 | * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if | |
4849 | * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid | |
4850 | * interrupt. | |
4851 | * | |
4852 | * This function is called by the USB core when an interrupt occurs | |
4853 | */ | |
4854 | static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd) | |
4855 | { | |
4856 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
7359d482 | 4857 | |
ca18f4a6 | 4858 | return dwc2_handle_hcd_intr(hsotg); |
7359d482 PZ |
4859 | } |
4860 | ||
4861 | /* | |
4862 | * Creates Status Change bitmap for the root hub and root port. The bitmap is | |
4863 | * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1 | |
4864 | * is the status change indicator for the single root port. Returns 1 if either | |
4865 | * change indicator is 1, otherwise returns 0. | |
4866 | */ | |
4867 | static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf) | |
4868 | { | |
4869 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4870 | ||
4871 | buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1; | |
4872 | return buf[0] != 0; | |
4873 | } | |
4874 | ||
4875 | /* Handles hub class-specific requests */ | |
4876 | static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue, | |
4877 | u16 windex, char *buf, u16 wlength) | |
4878 | { | |
4879 | int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq, | |
4880 | wvalue, windex, buf, wlength); | |
4881 | return retval; | |
4882 | } | |
4883 | ||
4884 | /* Handles hub TT buffer clear completions */ | |
4885 | static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd, | |
4886 | struct usb_host_endpoint *ep) | |
4887 | { | |
4888 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4889 | struct dwc2_qh *qh; | |
4890 | unsigned long flags; | |
4891 | ||
4892 | qh = ep->hcpriv; | |
4893 | if (!qh) | |
4894 | return; | |
4895 | ||
4896 | spin_lock_irqsave(&hsotg->lock, flags); | |
4897 | qh->tt_buffer_dirty = 0; | |
4898 | ||
4899 | if (hsotg->flags.b.port_connect_status) | |
4900 | dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL); | |
4901 | ||
4902 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4903 | } | |
4904 | ||
ca8b0332 CY |
4905 | /* |
4906 | * HPRT0_SPD_HIGH_SPEED: high speed | |
4907 | * HPRT0_SPD_FULL_SPEED: full speed | |
4908 | */ | |
4909 | static void dwc2_change_bus_speed(struct usb_hcd *hcd, int speed) | |
4910 | { | |
4911 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4912 | ||
4913 | if (hsotg->params.speed == speed) | |
4914 | return; | |
4915 | ||
4916 | hsotg->params.speed = speed; | |
4917 | queue_work(hsotg->wq_otg, &hsotg->wf_otg); | |
4918 | } | |
4919 | ||
4920 | static void dwc2_free_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
4921 | { | |
4922 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4923 | ||
4924 | if (!hsotg->params.change_speed_quirk) | |
4925 | return; | |
4926 | ||
4927 | /* | |
4928 | * On removal, set speed to default high-speed. | |
4929 | */ | |
4930 | if (udev->parent && udev->parent->speed > USB_SPEED_UNKNOWN && | |
4931 | udev->parent->speed < USB_SPEED_HIGH) { | |
4932 | dev_info(hsotg->dev, "Set speed to default high-speed\n"); | |
4933 | dwc2_change_bus_speed(hcd, HPRT0_SPD_HIGH_SPEED); | |
4934 | } | |
4935 | } | |
4936 | ||
4937 | static int dwc2_reset_device(struct usb_hcd *hcd, struct usb_device *udev) | |
4938 | { | |
4939 | struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); | |
4940 | ||
4941 | if (!hsotg->params.change_speed_quirk) | |
4942 | return 0; | |
4943 | ||
4944 | if (udev->speed == USB_SPEED_HIGH) { | |
4945 | dev_info(hsotg->dev, "Set speed to high-speed\n"); | |
4946 | dwc2_change_bus_speed(hcd, HPRT0_SPD_HIGH_SPEED); | |
4947 | } else if ((udev->speed == USB_SPEED_FULL || | |
4948 | udev->speed == USB_SPEED_LOW)) { | |
4949 | /* | |
4950 | * Change speed setting to full-speed if there's | |
4951 | * a full-speed or low-speed device plugged in. | |
4952 | */ | |
4953 | dev_info(hsotg->dev, "Set speed to full-speed\n"); | |
4954 | dwc2_change_bus_speed(hcd, HPRT0_SPD_FULL_SPEED); | |
4955 | } | |
4956 | ||
4957 | return 0; | |
4958 | } | |
4959 | ||
7359d482 PZ |
4960 | static struct hc_driver dwc2_hc_driver = { |
4961 | .description = "dwc2_hsotg", | |
4962 | .product_desc = "DWC OTG Controller", | |
4963 | .hcd_priv_size = sizeof(struct wrapper_priv_data), | |
4964 | ||
4965 | .irq = _dwc2_hcd_irq, | |
8add17cf | 4966 | .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, |
7359d482 PZ |
4967 | |
4968 | .start = _dwc2_hcd_start, | |
4969 | .stop = _dwc2_hcd_stop, | |
4970 | .urb_enqueue = _dwc2_hcd_urb_enqueue, | |
4971 | .urb_dequeue = _dwc2_hcd_urb_dequeue, | |
4972 | .endpoint_disable = _dwc2_hcd_endpoint_disable, | |
4973 | .endpoint_reset = _dwc2_hcd_endpoint_reset, | |
4974 | .get_frame_number = _dwc2_hcd_get_frame_number, | |
4975 | ||
4976 | .hub_status_data = _dwc2_hcd_hub_status_data, | |
4977 | .hub_control = _dwc2_hcd_hub_control, | |
4978 | .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete, | |
99a65798 GH |
4979 | |
4980 | .bus_suspend = _dwc2_hcd_suspend, | |
4981 | .bus_resume = _dwc2_hcd_resume, | |
3bc04e28 DA |
4982 | |
4983 | .map_urb_for_dma = dwc2_map_urb_for_dma, | |
4984 | .unmap_urb_for_dma = dwc2_unmap_urb_for_dma, | |
7359d482 PZ |
4985 | }; |
4986 | ||
4987 | /* | |
4988 | * Frees secondary storage associated with the dwc2_hsotg structure contained | |
4989 | * in the struct usb_hcd field | |
4990 | */ | |
4991 | static void dwc2_hcd_free(struct dwc2_hsotg *hsotg) | |
4992 | { | |
4993 | u32 ahbcfg; | |
4994 | u32 dctl; | |
4995 | int i; | |
4996 | ||
4997 | dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n"); | |
4998 | ||
4999 | /* Free memory for QH/QTD lists */ | |
5000 | dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive); | |
5001 | dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active); | |
5002 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive); | |
5003 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready); | |
5004 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned); | |
5005 | dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued); | |
5006 | ||
5007 | /* Free memory for the host channels */ | |
5008 | for (i = 0; i < MAX_EPS_CHANNELS; i++) { | |
5009 | struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i]; | |
5010 | ||
9da51974 | 5011 | if (chan) { |
7359d482 PZ |
5012 | dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n", |
5013 | i, chan); | |
5014 | hsotg->hc_ptr_array[i] = NULL; | |
5015 | kfree(chan); | |
5016 | } | |
5017 | } | |
5018 | ||
95832c00 | 5019 | if (hsotg->params.host_dma) { |
7359d482 PZ |
5020 | if (hsotg->status_buf) { |
5021 | dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE, | |
5022 | hsotg->status_buf, | |
5023 | hsotg->status_buf_dma); | |
5024 | hsotg->status_buf = NULL; | |
5025 | } | |
5026 | } else { | |
5027 | kfree(hsotg->status_buf); | |
5028 | hsotg->status_buf = NULL; | |
5029 | } | |
5030 | ||
95c8bc36 | 5031 | ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG); |
7359d482 PZ |
5032 | |
5033 | /* Disable all interrupts */ | |
5034 | ahbcfg &= ~GAHBCFG_GLBL_INTR_EN; | |
95c8bc36 AS |
5035 | dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG); |
5036 | dwc2_writel(0, hsotg->regs + GINTMSK); | |
7359d482 | 5037 | |
9badec2f | 5038 | if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a) { |
95c8bc36 | 5039 | dctl = dwc2_readl(hsotg->regs + DCTL); |
7359d482 | 5040 | dctl |= DCTL_SFTDISCON; |
95c8bc36 | 5041 | dwc2_writel(dctl, hsotg->regs + DCTL); |
7359d482 PZ |
5042 | } |
5043 | ||
5044 | if (hsotg->wq_otg) { | |
5045 | if (!cancel_work_sync(&hsotg->wf_otg)) | |
5046 | flush_workqueue(hsotg->wq_otg); | |
5047 | destroy_workqueue(hsotg->wq_otg); | |
5048 | } | |
5049 | ||
7359d482 PZ |
5050 | del_timer(&hsotg->wkp_timer); |
5051 | } | |
5052 | ||
5053 | static void dwc2_hcd_release(struct dwc2_hsotg *hsotg) | |
5054 | { | |
5055 | /* Turn off all host-specific interrupts */ | |
5056 | dwc2_disable_host_interrupts(hsotg); | |
5057 | ||
5058 | dwc2_hcd_free(hsotg); | |
5059 | } | |
5060 | ||
7359d482 PZ |
5061 | /* |
5062 | * Initializes the HCD. This function allocates memory for and initializes the | |
5063 | * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the | |
5064 | * USB bus with the core and calls the hc_driver->start() function. It returns | |
5065 | * a negative error on failure. | |
5066 | */ | |
4fe160d5 | 5067 | int dwc2_hcd_init(struct dwc2_hsotg *hsotg) |
7359d482 | 5068 | { |
348becdc HK |
5069 | struct platform_device *pdev = to_platform_device(hsotg->dev); |
5070 | struct resource *res; | |
7359d482 PZ |
5071 | struct usb_hcd *hcd; |
5072 | struct dwc2_host_chan *channel; | |
9badec2f | 5073 | u32 hcfg; |
7359d482 | 5074 | int i, num_channels; |
9badec2f | 5075 | int retval; |
7359d482 | 5076 | |
f5500ecc DN |
5077 | if (usb_disabled()) |
5078 | return -ENODEV; | |
5079 | ||
e62662c7 | 5080 | dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n"); |
7359d482 | 5081 | |
9badec2f | 5082 | retval = -ENOMEM; |
7359d482 | 5083 | |
95c8bc36 | 5084 | hcfg = dwc2_readl(hsotg->regs + HCFG); |
7359d482 | 5085 | dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg); |
7359d482 PZ |
5086 | |
5087 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
5088 | hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) * | |
5089 | FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); | |
5090 | if (!hsotg->frame_num_array) | |
ba0e60d1 | 5091 | goto error1; |
7359d482 PZ |
5092 | hsotg->last_frame_num_array = kzalloc( |
5093 | sizeof(*hsotg->last_frame_num_array) * | |
5094 | FRAME_NUM_ARRAY_SIZE, GFP_KERNEL); | |
5095 | if (!hsotg->last_frame_num_array) | |
ba0e60d1 | 5096 | goto error1; |
7359d482 | 5097 | #endif |
483bb254 | 5098 | hsotg->last_frame_num = HFNUM_MAX_FRNUM; |
7359d482 | 5099 | |
a0112f48 | 5100 | /* Check if the bus driver or platform code has setup a dma_mask */ |
95832c00 | 5101 | if (hsotg->params.host_dma && |
9da51974 | 5102 | !hsotg->dev->dma_mask) { |
a0112f48 MK |
5103 | dev_warn(hsotg->dev, |
5104 | "dma_mask not set, disabling DMA\n"); | |
fdb09b3e | 5105 | hsotg->params.host_dma = false; |
95832c00 | 5106 | hsotg->params.dma_desc_enable = false; |
a0112f48 MK |
5107 | } |
5108 | ||
ba0e60d1 | 5109 | /* Set device flags indicating whether the HCD supports DMA */ |
95832c00 | 5110 | if (hsotg->params.host_dma) { |
30885313 PZ |
5111 | if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0) |
5112 | dev_warn(hsotg->dev, "can't set DMA mask\n"); | |
25a49445 PZ |
5113 | if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0) |
5114 | dev_warn(hsotg->dev, "can't set coherent DMA mask\n"); | |
ba0e60d1 PZ |
5115 | } |
5116 | ||
ca8b0332 CY |
5117 | if (hsotg->params.change_speed_quirk) { |
5118 | dwc2_hc_driver.free_dev = dwc2_free_dev; | |
5119 | dwc2_hc_driver.reset_device = dwc2_reset_device; | |
5120 | } | |
5121 | ||
ba0e60d1 PZ |
5122 | hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev)); |
5123 | if (!hcd) | |
5124 | goto error1; | |
5125 | ||
95832c00 | 5126 | if (!hsotg->params.host_dma) |
7de76ee1 MK |
5127 | hcd->self.uses_dma = 0; |
5128 | ||
ba0e60d1 PZ |
5129 | hcd->has_tt = 1; |
5130 | ||
348becdc HK |
5131 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
5132 | hcd->rsrc_start = res->start; | |
5133 | hcd->rsrc_len = resource_size(res); | |
5134 | ||
9da51974 | 5135 | ((struct wrapper_priv_data *)&hcd->hcd_priv)->hsotg = hsotg; |
ba0e60d1 PZ |
5136 | hsotg->priv = hcd; |
5137 | ||
7359d482 PZ |
5138 | /* |
5139 | * Disable the global interrupt until all the interrupt handlers are | |
5140 | * installed | |
5141 | */ | |
5142 | dwc2_disable_global_interrupts(hsotg); | |
5143 | ||
6706c721 | 5144 | /* Initialize the DWC_otg core, and select the Phy type */ |
0fe239bc | 5145 | retval = dwc2_core_init(hsotg, true); |
6706c721 MK |
5146 | if (retval) |
5147 | goto error2; | |
5148 | ||
7359d482 | 5149 | /* Create new workqueue and init work */ |
53510352 | 5150 | retval = -ENOMEM; |
ec7b1268 | 5151 | hsotg->wq_otg = alloc_ordered_workqueue("dwc2", 0); |
7359d482 PZ |
5152 | if (!hsotg->wq_otg) { |
5153 | dev_err(hsotg->dev, "Failed to create workqueue\n"); | |
5154 | goto error2; | |
5155 | } | |
5156 | INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change); | |
5157 | ||
e99e88a9 | 5158 | timer_setup(&hsotg->wkp_timer, dwc2_wakeup_detected, 0); |
7359d482 PZ |
5159 | |
5160 | /* Initialize the non-periodic schedule */ | |
5161 | INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive); | |
5162 | INIT_LIST_HEAD(&hsotg->non_periodic_sched_active); | |
5163 | ||
5164 | /* Initialize the periodic schedule */ | |
5165 | INIT_LIST_HEAD(&hsotg->periodic_sched_inactive); | |
5166 | INIT_LIST_HEAD(&hsotg->periodic_sched_ready); | |
5167 | INIT_LIST_HEAD(&hsotg->periodic_sched_assigned); | |
5168 | INIT_LIST_HEAD(&hsotg->periodic_sched_queued); | |
5169 | ||
c9c8ac01 DA |
5170 | INIT_LIST_HEAD(&hsotg->split_order); |
5171 | ||
7359d482 PZ |
5172 | /* |
5173 | * Create a host channel descriptor for each host channel implemented | |
5174 | * in the controller. Initialize the channel descriptor array. | |
5175 | */ | |
5176 | INIT_LIST_HEAD(&hsotg->free_hc_list); | |
bea8e86c | 5177 | num_channels = hsotg->params.host_channels; |
7359d482 PZ |
5178 | memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array)); |
5179 | ||
5180 | for (i = 0; i < num_channels; i++) { | |
5181 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); | |
9da51974 | 5182 | if (!channel) |
7359d482 PZ |
5183 | goto error3; |
5184 | channel->hc_num = i; | |
c9c8ac01 | 5185 | INIT_LIST_HEAD(&channel->split_order_list_entry); |
7359d482 PZ |
5186 | hsotg->hc_ptr_array[i] = channel; |
5187 | } | |
5188 | ||
5189 | /* Initialize hsotg start work */ | |
5190 | INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func); | |
5191 | ||
5192 | /* Initialize port reset work */ | |
5193 | INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func); | |
5194 | ||
5195 | /* | |
5196 | * Allocate space for storing data on status transactions. Normally no | |
5197 | * data is sent, but this space acts as a bit bucket. This must be | |
5198 | * done after usb_add_hcd since that function allocates the DMA buffer | |
5199 | * pool. | |
5200 | */ | |
95832c00 | 5201 | if (hsotg->params.host_dma) |
7359d482 PZ |
5202 | hsotg->status_buf = dma_alloc_coherent(hsotg->dev, |
5203 | DWC2_HCD_STATUS_BUF_SIZE, | |
5204 | &hsotg->status_buf_dma, GFP_KERNEL); | |
5205 | else | |
5206 | hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE, | |
5207 | GFP_KERNEL); | |
5208 | ||
5209 | if (!hsotg->status_buf) | |
5210 | goto error3; | |
5211 | ||
3b5fcc9a GH |
5212 | /* |
5213 | * Create kmem caches to handle descriptor buffers in descriptor | |
5214 | * DMA mode. | |
5215 | * Alignment must be set to 512 bytes. | |
5216 | */ | |
bea8e86c JY |
5217 | if (hsotg->params.dma_desc_enable || |
5218 | hsotg->params.dma_desc_fs_enable) { | |
3b5fcc9a | 5219 | hsotg->desc_gen_cache = kmem_cache_create("dwc2-gen-desc", |
ec703251 | 5220 | sizeof(struct dwc2_dma_desc) * |
3b5fcc9a GH |
5221 | MAX_DMA_DESC_NUM_GENERIC, 512, SLAB_CACHE_DMA, |
5222 | NULL); | |
5223 | if (!hsotg->desc_gen_cache) { | |
5224 | dev_err(hsotg->dev, | |
5225 | "unable to create dwc2 generic desc cache\n"); | |
5226 | ||
5227 | /* | |
5228 | * Disable descriptor dma mode since it will not be | |
5229 | * usable. | |
5230 | */ | |
95832c00 JY |
5231 | hsotg->params.dma_desc_enable = false; |
5232 | hsotg->params.dma_desc_fs_enable = false; | |
3b5fcc9a GH |
5233 | } |
5234 | ||
5235 | hsotg->desc_hsisoc_cache = kmem_cache_create("dwc2-hsisoc-desc", | |
ec703251 | 5236 | sizeof(struct dwc2_dma_desc) * |
3b5fcc9a GH |
5237 | MAX_DMA_DESC_NUM_HS_ISOC, 512, 0, NULL); |
5238 | if (!hsotg->desc_hsisoc_cache) { | |
5239 | dev_err(hsotg->dev, | |
5240 | "unable to create dwc2 hs isoc desc cache\n"); | |
5241 | ||
5242 | kmem_cache_destroy(hsotg->desc_gen_cache); | |
5243 | ||
5244 | /* | |
5245 | * Disable descriptor dma mode since it will not be | |
5246 | * usable. | |
5247 | */ | |
95832c00 JY |
5248 | hsotg->params.dma_desc_enable = false; |
5249 | hsotg->params.dma_desc_fs_enable = false; | |
3b5fcc9a GH |
5250 | } |
5251 | } | |
5252 | ||
7359d482 PZ |
5253 | hsotg->otg_port = 1; |
5254 | hsotg->frame_list = NULL; | |
5255 | hsotg->frame_list_dma = 0; | |
5256 | hsotg->periodic_qh_count = 0; | |
5257 | ||
5258 | /* Initiate lx_state to L3 disconnected state */ | |
5259 | hsotg->lx_state = DWC2_L3; | |
5260 | ||
5261 | hcd->self.otg_port = hsotg->otg_port; | |
5262 | ||
5263 | /* Don't support SG list at this point */ | |
5264 | hcd->self.sg_tablesize = 0; | |
5265 | ||
9df4ceac MYK |
5266 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
5267 | otg_set_host(hsotg->uphy->otg, &hcd->self); | |
5268 | ||
7359d482 PZ |
5269 | /* |
5270 | * Finish generic HCD initialization and start the HCD. This function | |
5271 | * allocates the DMA buffer pool, registers the USB bus, requests the | |
5272 | * IRQ line, and calls hcd_start method. | |
5273 | */ | |
4fe160d5 | 5274 | retval = usb_add_hcd(hcd, hsotg->irq, IRQF_SHARED); |
7359d482 | 5275 | if (retval < 0) |
3b5fcc9a | 5276 | goto error4; |
7359d482 | 5277 | |
3c9740a1 PC |
5278 | device_wakeup_enable(hcd->self.controller); |
5279 | ||
7359d482 PZ |
5280 | dwc2_hcd_dump_state(hsotg); |
5281 | ||
5282 | dwc2_enable_global_interrupts(hsotg); | |
5283 | ||
5284 | return 0; | |
5285 | ||
3b5fcc9a GH |
5286 | error4: |
5287 | kmem_cache_destroy(hsotg->desc_gen_cache); | |
5288 | kmem_cache_destroy(hsotg->desc_hsisoc_cache); | |
7359d482 PZ |
5289 | error3: |
5290 | dwc2_hcd_release(hsotg); | |
5291 | error2: | |
ba0e60d1 PZ |
5292 | usb_put_hcd(hcd); |
5293 | error1: | |
7359d482 PZ |
5294 | |
5295 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
5296 | kfree(hsotg->last_frame_num_array); | |
5297 | kfree(hsotg->frame_num_array); | |
5298 | #endif | |
5299 | ||
e62662c7 | 5300 | dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval); |
7359d482 PZ |
5301 | return retval; |
5302 | } | |
7359d482 PZ |
5303 | |
5304 | /* | |
5305 | * Removes the HCD. | |
5306 | * Frees memory and resources associated with the HCD and deregisters the bus. | |
5307 | */ | |
e62662c7 | 5308 | void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) |
7359d482 PZ |
5309 | { |
5310 | struct usb_hcd *hcd; | |
5311 | ||
e62662c7 | 5312 | dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n"); |
7359d482 PZ |
5313 | |
5314 | hcd = dwc2_hsotg_to_hcd(hsotg); | |
e62662c7 | 5315 | dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd); |
7359d482 PZ |
5316 | |
5317 | if (!hcd) { | |
e62662c7 | 5318 | dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n", |
7359d482 PZ |
5319 | __func__); |
5320 | return; | |
5321 | } | |
5322 | ||
9df4ceac MYK |
5323 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
5324 | otg_set_host(hsotg->uphy->otg, NULL); | |
5325 | ||
7359d482 PZ |
5326 | usb_remove_hcd(hcd); |
5327 | hsotg->priv = NULL; | |
3b5fcc9a GH |
5328 | |
5329 | kmem_cache_destroy(hsotg->desc_gen_cache); | |
5330 | kmem_cache_destroy(hsotg->desc_hsisoc_cache); | |
5331 | ||
7359d482 | 5332 | dwc2_hcd_release(hsotg); |
ba0e60d1 | 5333 | usb_put_hcd(hcd); |
7359d482 PZ |
5334 | |
5335 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
5336 | kfree(hsotg->last_frame_num_array); | |
5337 | kfree(hsotg->frame_num_array); | |
5338 | #endif | |
7359d482 | 5339 | } |
58e52ff6 JY |
5340 | |
5341 | /** | |
5342 | * dwc2_backup_host_registers() - Backup controller host registers. | |
5343 | * When suspending usb bus, registers needs to be backuped | |
5344 | * if controller power is disabled once suspended. | |
5345 | * | |
5346 | * @hsotg: Programming view of the DWC_otg controller | |
5347 | */ | |
5348 | int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg) | |
5349 | { | |
5350 | struct dwc2_hregs_backup *hr; | |
5351 | int i; | |
5352 | ||
5353 | dev_dbg(hsotg->dev, "%s\n", __func__); | |
5354 | ||
5355 | /* Backup Host regs */ | |
5356 | hr = &hsotg->hr_backup; | |
5357 | hr->hcfg = dwc2_readl(hsotg->regs + HCFG); | |
5358 | hr->haintmsk = dwc2_readl(hsotg->regs + HAINTMSK); | |
bea8e86c | 5359 | for (i = 0; i < hsotg->params.host_channels; ++i) |
58e52ff6 JY |
5360 | hr->hcintmsk[i] = dwc2_readl(hsotg->regs + HCINTMSK(i)); |
5361 | ||
5362 | hr->hprt0 = dwc2_read_hprt0(hsotg); | |
5363 | hr->hfir = dwc2_readl(hsotg->regs + HFIR); | |
5364 | hr->valid = true; | |
5365 | ||
5366 | return 0; | |
5367 | } | |
5368 | ||
5369 | /** | |
5370 | * dwc2_restore_host_registers() - Restore controller host registers. | |
5371 | * When resuming usb bus, device registers needs to be restored | |
5372 | * if controller power were disabled. | |
5373 | * | |
5374 | * @hsotg: Programming view of the DWC_otg controller | |
5375 | */ | |
5376 | int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg) | |
5377 | { | |
5378 | struct dwc2_hregs_backup *hr; | |
5379 | int i; | |
5380 | ||
5381 | dev_dbg(hsotg->dev, "%s\n", __func__); | |
5382 | ||
5383 | /* Restore host regs */ | |
5384 | hr = &hsotg->hr_backup; | |
5385 | if (!hr->valid) { | |
5386 | dev_err(hsotg->dev, "%s: no host registers to restore\n", | |
5387 | __func__); | |
5388 | return -EINVAL; | |
5389 | } | |
5390 | hr->valid = false; | |
5391 | ||
5392 | dwc2_writel(hr->hcfg, hsotg->regs + HCFG); | |
5393 | dwc2_writel(hr->haintmsk, hsotg->regs + HAINTMSK); | |
5394 | ||
bea8e86c | 5395 | for (i = 0; i < hsotg->params.host_channels; ++i) |
58e52ff6 JY |
5396 | dwc2_writel(hr->hcintmsk[i], hsotg->regs + HCINTMSK(i)); |
5397 | ||
5398 | dwc2_writel(hr->hprt0, hsotg->regs + HPRT0); | |
5399 | dwc2_writel(hr->hfir, hsotg->regs + HFIR); | |
5400 | hsotg->frame_number = 0; | |
5401 | ||
5402 | return 0; | |
5403 | } |