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550a7375 FB |
1 | /* |
2 | * MUSB OTG driver core code | |
3 | * | |
4 | * Copyright 2005 Mentor Graphics Corporation | |
5 | * Copyright (C) 2005-2006 by Texas Instruments | |
6 | * Copyright (C) 2006-2007 Nokia Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED | |
23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
25 | * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
29 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
35 | /* | |
36 | * Inventra (Multipoint) Dual-Role Controller Driver for Linux. | |
37 | * | |
38 | * This consists of a Host Controller Driver (HCD) and a peripheral | |
39 | * controller driver implementing the "Gadget" API; OTG support is | |
40 | * in the works. These are normal Linux-USB controller drivers which | |
41 | * use IRQs and have no dedicated thread. | |
42 | * | |
43 | * This version of the driver has only been used with products from | |
44 | * Texas Instruments. Those products integrate the Inventra logic | |
45 | * with other DMA, IRQ, and bus modules, as well as other logic that | |
46 | * needs to be reflected in this driver. | |
47 | * | |
48 | * | |
49 | * NOTE: the original Mentor code here was pretty much a collection | |
50 | * of mechanisms that don't seem to have been fully integrated/working | |
51 | * for *any* Linux kernel version. This version aims at Linux 2.6.now, | |
52 | * Key open issues include: | |
53 | * | |
54 | * - Lack of host-side transaction scheduling, for all transfer types. | |
55 | * The hardware doesn't do it; instead, software must. | |
56 | * | |
57 | * This is not an issue for OTG devices that don't support external | |
58 | * hubs, but for more "normal" USB hosts it's a user issue that the | |
59 | * "multipoint" support doesn't scale in the expected ways. That | |
60 | * includes DaVinci EVM in a common non-OTG mode. | |
61 | * | |
62 | * * Control and bulk use dedicated endpoints, and there's as | |
63 | * yet no mechanism to either (a) reclaim the hardware when | |
64 | * peripherals are NAKing, which gets complicated with bulk | |
65 | * endpoints, or (b) use more than a single bulk endpoint in | |
66 | * each direction. | |
67 | * | |
68 | * RESULT: one device may be perceived as blocking another one. | |
69 | * | |
70 | * * Interrupt and isochronous will dynamically allocate endpoint | |
71 | * hardware, but (a) there's no record keeping for bandwidth; | |
72 | * (b) in the common case that few endpoints are available, there | |
73 | * is no mechanism to reuse endpoints to talk to multiple devices. | |
74 | * | |
75 | * RESULT: At one extreme, bandwidth can be overcommitted in | |
76 | * some hardware configurations, no faults will be reported. | |
77 | * At the other extreme, the bandwidth capabilities which do | |
78 | * exist tend to be severely undercommitted. You can't yet hook | |
79 | * up both a keyboard and a mouse to an external USB hub. | |
80 | */ | |
81 | ||
82 | /* | |
83 | * This gets many kinds of configuration information: | |
84 | * - Kconfig for everything user-configurable | |
550a7375 | 85 | * - platform_device for addressing, irq, and platform_data |
5ae477b0 | 86 | * - platform_data is mostly for board-specific information |
c767c1c6 | 87 | * (plus recentrly, SOC or family details) |
550a7375 FB |
88 | * |
89 | * Most of the conditional compilation will (someday) vanish. | |
90 | */ | |
91 | ||
92 | #include <linux/module.h> | |
93 | #include <linux/kernel.h> | |
94 | #include <linux/sched.h> | |
95 | #include <linux/slab.h> | |
550a7375 FB |
96 | #include <linux/list.h> |
97 | #include <linux/kobject.h> | |
9303961f | 98 | #include <linux/prefetch.h> |
550a7375 FB |
99 | #include <linux/platform_device.h> |
100 | #include <linux/io.h> | |
8d2421e6 | 101 | #include <linux/dma-mapping.h> |
550a7375 | 102 | |
550a7375 FB |
103 | #include "musb_core.h" |
104 | ||
f7f9d63e | 105 | #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON) |
550a7375 FB |
106 | |
107 | ||
550a7375 FB |
108 | #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia" |
109 | #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver" | |
110 | ||
e8164f64 | 111 | #define MUSB_VERSION "6.0" |
550a7375 FB |
112 | |
113 | #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION | |
114 | ||
05ac10dd | 115 | #define MUSB_DRIVER_NAME "musb-hdrc" |
550a7375 FB |
116 | const char musb_driver_name[] = MUSB_DRIVER_NAME; |
117 | ||
118 | MODULE_DESCRIPTION(DRIVER_INFO); | |
119 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
120 | MODULE_LICENSE("GPL"); | |
121 | MODULE_ALIAS("platform:" MUSB_DRIVER_NAME); | |
122 | ||
123 | ||
124 | /*-------------------------------------------------------------------------*/ | |
125 | ||
126 | static inline struct musb *dev_to_musb(struct device *dev) | |
127 | { | |
550a7375 | 128 | return dev_get_drvdata(dev); |
550a7375 FB |
129 | } |
130 | ||
131 | /*-------------------------------------------------------------------------*/ | |
132 | ||
ffb865b1 | 133 | #ifndef CONFIG_BLACKFIN |
b96d3b08 | 134 | static int musb_ulpi_read(struct usb_phy *phy, u32 offset) |
ffb865b1 | 135 | { |
b96d3b08 | 136 | void __iomem *addr = phy->io_priv; |
ffb865b1 HK |
137 | int i = 0; |
138 | u8 r; | |
139 | u8 power; | |
bf070bc1 GI |
140 | int ret; |
141 | ||
142 | pm_runtime_get_sync(phy->io_dev); | |
ffb865b1 HK |
143 | |
144 | /* Make sure the transceiver is not in low power mode */ | |
145 | power = musb_readb(addr, MUSB_POWER); | |
146 | power &= ~MUSB_POWER_SUSPENDM; | |
147 | musb_writeb(addr, MUSB_POWER, power); | |
148 | ||
149 | /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the | |
150 | * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM. | |
151 | */ | |
152 | ||
153 | musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset); | |
154 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, | |
155 | MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR); | |
156 | ||
157 | while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL) | |
158 | & MUSB_ULPI_REG_CMPLT)) { | |
159 | i++; | |
bf070bc1 GI |
160 | if (i == 10000) { |
161 | ret = -ETIMEDOUT; | |
162 | goto out; | |
163 | } | |
ffb865b1 HK |
164 | |
165 | } | |
166 | r = musb_readb(addr, MUSB_ULPI_REG_CONTROL); | |
167 | r &= ~MUSB_ULPI_REG_CMPLT; | |
168 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r); | |
169 | ||
bf070bc1 GI |
170 | ret = musb_readb(addr, MUSB_ULPI_REG_DATA); |
171 | ||
172 | out: | |
173 | pm_runtime_put(phy->io_dev); | |
174 | ||
175 | return ret; | |
ffb865b1 HK |
176 | } |
177 | ||
b96d3b08 | 178 | static int musb_ulpi_write(struct usb_phy *phy, u32 offset, u32 data) |
ffb865b1 | 179 | { |
b96d3b08 | 180 | void __iomem *addr = phy->io_priv; |
ffb865b1 HK |
181 | int i = 0; |
182 | u8 r = 0; | |
183 | u8 power; | |
bf070bc1 GI |
184 | int ret = 0; |
185 | ||
186 | pm_runtime_get_sync(phy->io_dev); | |
ffb865b1 HK |
187 | |
188 | /* Make sure the transceiver is not in low power mode */ | |
189 | power = musb_readb(addr, MUSB_POWER); | |
190 | power &= ~MUSB_POWER_SUSPENDM; | |
191 | musb_writeb(addr, MUSB_POWER, power); | |
192 | ||
193 | musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset); | |
194 | musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data); | |
195 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ); | |
196 | ||
197 | while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL) | |
198 | & MUSB_ULPI_REG_CMPLT)) { | |
199 | i++; | |
bf070bc1 GI |
200 | if (i == 10000) { |
201 | ret = -ETIMEDOUT; | |
202 | goto out; | |
203 | } | |
ffb865b1 HK |
204 | } |
205 | ||
206 | r = musb_readb(addr, MUSB_ULPI_REG_CONTROL); | |
207 | r &= ~MUSB_ULPI_REG_CMPLT; | |
208 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r); | |
209 | ||
bf070bc1 GI |
210 | out: |
211 | pm_runtime_put(phy->io_dev); | |
212 | ||
213 | return ret; | |
ffb865b1 HK |
214 | } |
215 | #else | |
f2263db7 MF |
216 | #define musb_ulpi_read NULL |
217 | #define musb_ulpi_write NULL | |
ffb865b1 HK |
218 | #endif |
219 | ||
b96d3b08 | 220 | static struct usb_phy_io_ops musb_ulpi_access = { |
ffb865b1 HK |
221 | .read = musb_ulpi_read, |
222 | .write = musb_ulpi_write, | |
223 | }; | |
224 | ||
225 | /*-------------------------------------------------------------------------*/ | |
226 | ||
7c925546 | 227 | #if !defined(CONFIG_USB_MUSB_TUSB6010) && !defined(CONFIG_USB_MUSB_BLACKFIN) |
c6cf8b00 | 228 | |
550a7375 FB |
229 | /* |
230 | * Load an endpoint's FIFO | |
231 | */ | |
232 | void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src) | |
233 | { | |
5c8a86e1 | 234 | struct musb *musb = hw_ep->musb; |
550a7375 FB |
235 | void __iomem *fifo = hw_ep->fifo; |
236 | ||
603fe2b2 AKG |
237 | if (unlikely(len == 0)) |
238 | return; | |
239 | ||
550a7375 FB |
240 | prefetch((u8 *)src); |
241 | ||
5c8a86e1 | 242 | dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n", |
550a7375 FB |
243 | 'T', hw_ep->epnum, fifo, len, src); |
244 | ||
245 | /* we can't assume unaligned reads work */ | |
246 | if (likely((0x01 & (unsigned long) src) == 0)) { | |
247 | u16 index = 0; | |
248 | ||
249 | /* best case is 32bit-aligned source address */ | |
250 | if ((0x02 & (unsigned long) src) == 0) { | |
251 | if (len >= 4) { | |
2bf0a8f6 | 252 | iowrite32_rep(fifo, src + index, len >> 2); |
550a7375 FB |
253 | index += len & ~0x03; |
254 | } | |
255 | if (len & 0x02) { | |
256 | musb_writew(fifo, 0, *(u16 *)&src[index]); | |
257 | index += 2; | |
258 | } | |
259 | } else { | |
260 | if (len >= 2) { | |
2bf0a8f6 | 261 | iowrite16_rep(fifo, src + index, len >> 1); |
550a7375 FB |
262 | index += len & ~0x01; |
263 | } | |
264 | } | |
265 | if (len & 0x01) | |
266 | musb_writeb(fifo, 0, src[index]); | |
267 | } else { | |
268 | /* byte aligned */ | |
2bf0a8f6 | 269 | iowrite8_rep(fifo, src, len); |
550a7375 FB |
270 | } |
271 | } | |
272 | ||
843bb1d0 | 273 | #if !defined(CONFIG_USB_MUSB_AM35X) |
550a7375 FB |
274 | /* |
275 | * Unload an endpoint's FIFO | |
276 | */ | |
277 | void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) | |
278 | { | |
5c8a86e1 | 279 | struct musb *musb = hw_ep->musb; |
550a7375 FB |
280 | void __iomem *fifo = hw_ep->fifo; |
281 | ||
603fe2b2 AKG |
282 | if (unlikely(len == 0)) |
283 | return; | |
284 | ||
5c8a86e1 | 285 | dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n", |
550a7375 FB |
286 | 'R', hw_ep->epnum, fifo, len, dst); |
287 | ||
288 | /* we can't assume unaligned writes work */ | |
289 | if (likely((0x01 & (unsigned long) dst) == 0)) { | |
290 | u16 index = 0; | |
291 | ||
292 | /* best case is 32bit-aligned destination address */ | |
293 | if ((0x02 & (unsigned long) dst) == 0) { | |
294 | if (len >= 4) { | |
2bf0a8f6 | 295 | ioread32_rep(fifo, dst, len >> 2); |
550a7375 FB |
296 | index = len & ~0x03; |
297 | } | |
298 | if (len & 0x02) { | |
299 | *(u16 *)&dst[index] = musb_readw(fifo, 0); | |
300 | index += 2; | |
301 | } | |
302 | } else { | |
303 | if (len >= 2) { | |
2bf0a8f6 | 304 | ioread16_rep(fifo, dst, len >> 1); |
550a7375 FB |
305 | index = len & ~0x01; |
306 | } | |
307 | } | |
308 | if (len & 0x01) | |
309 | dst[index] = musb_readb(fifo, 0); | |
310 | } else { | |
311 | /* byte aligned */ | |
2bf0a8f6 | 312 | ioread8_rep(fifo, dst, len); |
550a7375 FB |
313 | } |
314 | } | |
843bb1d0 | 315 | #endif |
550a7375 FB |
316 | |
317 | #endif /* normal PIO */ | |
318 | ||
319 | ||
320 | /*-------------------------------------------------------------------------*/ | |
321 | ||
322 | /* for high speed test mode; see USB 2.0 spec 7.1.20 */ | |
323 | static const u8 musb_test_packet[53] = { | |
324 | /* implicit SYNC then DATA0 to start */ | |
325 | ||
326 | /* JKJKJKJK x9 */ | |
327 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
328 | /* JJKKJJKK x8 */ | |
329 | 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, | |
330 | /* JJJJKKKK x8 */ | |
331 | 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, | |
332 | /* JJJJJJJKKKKKKK x8 */ | |
333 | 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
334 | /* JJJJJJJK x8 */ | |
335 | 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, | |
336 | /* JKKKKKKK x10, JK */ | |
337 | 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e | |
338 | ||
339 | /* implicit CRC16 then EOP to end */ | |
340 | }; | |
341 | ||
342 | void musb_load_testpacket(struct musb *musb) | |
343 | { | |
344 | void __iomem *regs = musb->endpoints[0].regs; | |
345 | ||
346 | musb_ep_select(musb->mregs, 0); | |
347 | musb_write_fifo(musb->control_ep, | |
348 | sizeof(musb_test_packet), musb_test_packet); | |
349 | musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY); | |
350 | } | |
351 | ||
352 | /*-------------------------------------------------------------------------*/ | |
353 | ||
550a7375 FB |
354 | /* |
355 | * Handles OTG hnp timeouts, such as b_ase0_brst | |
356 | */ | |
a156544b | 357 | static void musb_otg_timer_func(unsigned long data) |
550a7375 FB |
358 | { |
359 | struct musb *musb = (struct musb *)data; | |
360 | unsigned long flags; | |
361 | ||
362 | spin_lock_irqsave(&musb->lock, flags); | |
e47d9254 | 363 | switch (musb->xceiv->otg->state) { |
550a7375 | 364 | case OTG_STATE_B_WAIT_ACON: |
5c8a86e1 | 365 | dev_dbg(musb->controller, "HNP: b_wait_acon timeout; back to b_peripheral\n"); |
550a7375 | 366 | musb_g_disconnect(musb); |
e47d9254 | 367 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
368 | musb->is_active = 0; |
369 | break; | |
ab983f2a | 370 | case OTG_STATE_A_SUSPEND: |
550a7375 | 371 | case OTG_STATE_A_WAIT_BCON: |
5c8a86e1 | 372 | dev_dbg(musb->controller, "HNP: %s timeout\n", |
e47d9254 | 373 | usb_otg_state_string(musb->xceiv->otg->state)); |
743411b3 | 374 | musb_platform_set_vbus(musb, 0); |
e47d9254 | 375 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL; |
550a7375 FB |
376 | break; |
377 | default: | |
5c8a86e1 | 378 | dev_dbg(musb->controller, "HNP: Unhandled mode %s\n", |
e47d9254 | 379 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 | 380 | } |
550a7375 FB |
381 | spin_unlock_irqrestore(&musb->lock, flags); |
382 | } | |
383 | ||
550a7375 | 384 | /* |
f7f9d63e | 385 | * Stops the HNP transition. Caller must take care of locking. |
550a7375 FB |
386 | */ |
387 | void musb_hnp_stop(struct musb *musb) | |
388 | { | |
8b125df5 | 389 | struct usb_hcd *hcd = musb->hcd; |
550a7375 FB |
390 | void __iomem *mbase = musb->mregs; |
391 | u8 reg; | |
392 | ||
42c0bf1c | 393 | dev_dbg(musb->controller, "HNP: stop from %s\n", |
e47d9254 | 394 | usb_otg_state_string(musb->xceiv->otg->state)); |
ab983f2a | 395 | |
e47d9254 | 396 | switch (musb->xceiv->otg->state) { |
550a7375 | 397 | case OTG_STATE_A_PERIPHERAL: |
550a7375 | 398 | musb_g_disconnect(musb); |
5c8a86e1 | 399 | dev_dbg(musb->controller, "HNP: back to %s\n", |
e47d9254 | 400 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
401 | break; |
402 | case OTG_STATE_B_HOST: | |
5c8a86e1 | 403 | dev_dbg(musb->controller, "HNP: Disabling HR\n"); |
74c2e936 DM |
404 | if (hcd) |
405 | hcd->self.is_b_host = 0; | |
e47d9254 | 406 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
407 | MUSB_DEV_MODE(musb); |
408 | reg = musb_readb(mbase, MUSB_POWER); | |
409 | reg |= MUSB_POWER_SUSPENDM; | |
410 | musb_writeb(mbase, MUSB_POWER, reg); | |
411 | /* REVISIT: Start SESSION_REQUEST here? */ | |
412 | break; | |
413 | default: | |
5c8a86e1 | 414 | dev_dbg(musb->controller, "HNP: Stopping in unknown state %s\n", |
e47d9254 | 415 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
416 | } |
417 | ||
418 | /* | |
419 | * When returning to A state after HNP, avoid hub_port_rebounce(), | |
420 | * which cause occasional OPT A "Did not receive reset after connect" | |
421 | * errors. | |
422 | */ | |
749da5f8 | 423 | musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16); |
550a7375 FB |
424 | } |
425 | ||
550a7375 FB |
426 | /* |
427 | * Interrupt Service Routine to record USB "global" interrupts. | |
428 | * Since these do not happen often and signify things of | |
429 | * paramount importance, it seems OK to check them individually; | |
430 | * the order of the tests is specified in the manual | |
431 | * | |
432 | * @param musb instance pointer | |
433 | * @param int_usb register contents | |
434 | * @param devctl | |
435 | * @param power | |
436 | */ | |
437 | ||
550a7375 | 438 | static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, |
b11e94d0 | 439 | u8 devctl) |
550a7375 FB |
440 | { |
441 | irqreturn_t handled = IRQ_NONE; | |
550a7375 | 442 | |
b11e94d0 | 443 | dev_dbg(musb->controller, "<== DevCtl=%02x, int_usb=0x%x\n", devctl, |
550a7375 FB |
444 | int_usb); |
445 | ||
446 | /* in host mode, the peripheral may issue remote wakeup. | |
447 | * in peripheral mode, the host may resume the link. | |
448 | * spurious RESUME irqs happen too, paired with SUSPEND. | |
449 | */ | |
450 | if (int_usb & MUSB_INTR_RESUME) { | |
451 | handled = IRQ_HANDLED; | |
e47d9254 | 452 | dev_dbg(musb->controller, "RESUME (%s)\n", usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
453 | |
454 | if (devctl & MUSB_DEVCTL_HM) { | |
aa471456 | 455 | void __iomem *mbase = musb->mregs; |
b11e94d0 | 456 | u8 power; |
aa471456 | 457 | |
e47d9254 | 458 | switch (musb->xceiv->otg->state) { |
550a7375 FB |
459 | case OTG_STATE_A_SUSPEND: |
460 | /* remote wakeup? later, GetPortStatus | |
461 | * will stop RESUME signaling | |
462 | */ | |
463 | ||
b11e94d0 | 464 | power = musb_readb(musb->mregs, MUSB_POWER); |
550a7375 FB |
465 | if (power & MUSB_POWER_SUSPENDM) { |
466 | /* spurious */ | |
467 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
5c8a86e1 | 468 | dev_dbg(musb->controller, "Spurious SUSPENDM\n"); |
550a7375 FB |
469 | break; |
470 | } | |
471 | ||
472 | power &= ~MUSB_POWER_SUSPENDM; | |
473 | musb_writeb(mbase, MUSB_POWER, | |
474 | power | MUSB_POWER_RESUME); | |
475 | ||
476 | musb->port1_status |= | |
477 | (USB_PORT_STAT_C_SUSPEND << 16) | |
478 | | MUSB_PORT_STAT_RESUME; | |
30d361bf DM |
479 | musb->rh_timer = jiffies |
480 | + msecs_to_jiffies(20); | |
baadd52f | 481 | musb->need_finish_resume = 1; |
550a7375 | 482 | |
e47d9254 | 483 | musb->xceiv->otg->state = OTG_STATE_A_HOST; |
550a7375 | 484 | musb->is_active = 1; |
550a7375 FB |
485 | break; |
486 | case OTG_STATE_B_WAIT_ACON: | |
e47d9254 | 487 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
488 | musb->is_active = 1; |
489 | MUSB_DEV_MODE(musb); | |
490 | break; | |
491 | default: | |
492 | WARNING("bogus %s RESUME (%s)\n", | |
493 | "host", | |
e47d9254 | 494 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 | 495 | } |
550a7375 | 496 | } else { |
e47d9254 | 497 | switch (musb->xceiv->otg->state) { |
550a7375 FB |
498 | case OTG_STATE_A_SUSPEND: |
499 | /* possibly DISCONNECT is upcoming */ | |
e47d9254 | 500 | musb->xceiv->otg->state = OTG_STATE_A_HOST; |
0b3eba44 | 501 | musb_host_resume_root_hub(musb); |
550a7375 | 502 | break; |
550a7375 FB |
503 | case OTG_STATE_B_WAIT_ACON: |
504 | case OTG_STATE_B_PERIPHERAL: | |
505 | /* disconnect while suspended? we may | |
506 | * not get a disconnect irq... | |
507 | */ | |
508 | if ((devctl & MUSB_DEVCTL_VBUS) | |
509 | != (3 << MUSB_DEVCTL_VBUS_SHIFT) | |
510 | ) { | |
511 | musb->int_usb |= MUSB_INTR_DISCONNECT; | |
512 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
513 | break; | |
514 | } | |
515 | musb_g_resume(musb); | |
516 | break; | |
517 | case OTG_STATE_B_IDLE: | |
518 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
519 | break; | |
550a7375 FB |
520 | default: |
521 | WARNING("bogus %s RESUME (%s)\n", | |
522 | "peripheral", | |
e47d9254 | 523 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
524 | } |
525 | } | |
526 | } | |
527 | ||
550a7375 FB |
528 | /* see manual for the order of the tests */ |
529 | if (int_usb & MUSB_INTR_SESSREQ) { | |
aa471456 FB |
530 | void __iomem *mbase = musb->mregs; |
531 | ||
19aab56c HK |
532 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS |
533 | && (devctl & MUSB_DEVCTL_BDEVICE)) { | |
5c8a86e1 | 534 | dev_dbg(musb->controller, "SessReq while on B state\n"); |
a6038ee7 HK |
535 | return IRQ_HANDLED; |
536 | } | |
537 | ||
5c8a86e1 | 538 | dev_dbg(musb->controller, "SESSION_REQUEST (%s)\n", |
e47d9254 | 539 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
540 | |
541 | /* IRQ arrives from ID pin sense or (later, if VBUS power | |
542 | * is removed) SRP. responses are time critical: | |
543 | * - turn on VBUS (with silicon-specific mechanism) | |
544 | * - go through A_WAIT_VRISE | |
545 | * - ... to A_WAIT_BCON. | |
546 | * a_wait_vrise_tmout triggers VBUS_ERROR transitions | |
547 | */ | |
548 | musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); | |
549 | musb->ep0_stage = MUSB_EP0_START; | |
e47d9254 | 550 | musb->xceiv->otg->state = OTG_STATE_A_IDLE; |
550a7375 | 551 | MUSB_HST_MODE(musb); |
743411b3 | 552 | musb_platform_set_vbus(musb, 1); |
550a7375 FB |
553 | |
554 | handled = IRQ_HANDLED; | |
555 | } | |
556 | ||
557 | if (int_usb & MUSB_INTR_VBUSERROR) { | |
558 | int ignore = 0; | |
559 | ||
560 | /* During connection as an A-Device, we may see a short | |
561 | * current spikes causing voltage drop, because of cable | |
562 | * and peripheral capacitance combined with vbus draw. | |
563 | * (So: less common with truly self-powered devices, where | |
564 | * vbus doesn't act like a power supply.) | |
565 | * | |
566 | * Such spikes are short; usually less than ~500 usec, max | |
567 | * of ~2 msec. That is, they're not sustained overcurrent | |
568 | * errors, though they're reported using VBUSERROR irqs. | |
569 | * | |
570 | * Workarounds: (a) hardware: use self powered devices. | |
571 | * (b) software: ignore non-repeated VBUS errors. | |
572 | * | |
573 | * REVISIT: do delays from lots of DEBUG_KERNEL checks | |
574 | * make trouble here, keeping VBUS < 4.4V ? | |
575 | */ | |
e47d9254 | 576 | switch (musb->xceiv->otg->state) { |
550a7375 FB |
577 | case OTG_STATE_A_HOST: |
578 | /* recovery is dicey once we've gotten past the | |
579 | * initial stages of enumeration, but if VBUS | |
580 | * stayed ok at the other end of the link, and | |
581 | * another reset is due (at least for high speed, | |
582 | * to redo the chirp etc), it might work OK... | |
583 | */ | |
584 | case OTG_STATE_A_WAIT_BCON: | |
585 | case OTG_STATE_A_WAIT_VRISE: | |
586 | if (musb->vbuserr_retry) { | |
aa471456 FB |
587 | void __iomem *mbase = musb->mregs; |
588 | ||
550a7375 FB |
589 | musb->vbuserr_retry--; |
590 | ignore = 1; | |
591 | devctl |= MUSB_DEVCTL_SESSION; | |
592 | musb_writeb(mbase, MUSB_DEVCTL, devctl); | |
593 | } else { | |
594 | musb->port1_status |= | |
749da5f8 AS |
595 | USB_PORT_STAT_OVERCURRENT |
596 | | (USB_PORT_STAT_C_OVERCURRENT << 16); | |
550a7375 FB |
597 | } |
598 | break; | |
599 | default: | |
600 | break; | |
601 | } | |
602 | ||
54485116 GI |
603 | dev_printk(ignore ? KERN_DEBUG : KERN_ERR, musb->controller, |
604 | "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", | |
e47d9254 | 605 | usb_otg_state_string(musb->xceiv->otg->state), |
550a7375 FB |
606 | devctl, |
607 | ({ char *s; | |
608 | switch (devctl & MUSB_DEVCTL_VBUS) { | |
609 | case 0 << MUSB_DEVCTL_VBUS_SHIFT: | |
610 | s = "<SessEnd"; break; | |
611 | case 1 << MUSB_DEVCTL_VBUS_SHIFT: | |
612 | s = "<AValid"; break; | |
613 | case 2 << MUSB_DEVCTL_VBUS_SHIFT: | |
614 | s = "<VBusValid"; break; | |
615 | /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */ | |
616 | default: | |
617 | s = "VALID"; break; | |
2b84f92b | 618 | } s; }), |
550a7375 FB |
619 | VBUSERR_RETRY_COUNT - musb->vbuserr_retry, |
620 | musb->port1_status); | |
621 | ||
622 | /* go through A_WAIT_VFALL then start a new session */ | |
623 | if (!ignore) | |
743411b3 | 624 | musb_platform_set_vbus(musb, 0); |
550a7375 FB |
625 | handled = IRQ_HANDLED; |
626 | } | |
627 | ||
1c25fda4 | 628 | if (int_usb & MUSB_INTR_SUSPEND) { |
b11e94d0 | 629 | dev_dbg(musb->controller, "SUSPEND (%s) devctl %02x\n", |
e47d9254 | 630 | usb_otg_state_string(musb->xceiv->otg->state), devctl); |
1c25fda4 AM |
631 | handled = IRQ_HANDLED; |
632 | ||
e47d9254 | 633 | switch (musb->xceiv->otg->state) { |
1c25fda4 AM |
634 | case OTG_STATE_A_PERIPHERAL: |
635 | /* We also come here if the cable is removed, since | |
636 | * this silicon doesn't report ID-no-longer-grounded. | |
637 | * | |
638 | * We depend on T(a_wait_bcon) to shut us down, and | |
639 | * hope users don't do anything dicey during this | |
640 | * undesired detour through A_WAIT_BCON. | |
641 | */ | |
642 | musb_hnp_stop(musb); | |
0b3eba44 | 643 | musb_host_resume_root_hub(musb); |
1c25fda4 AM |
644 | musb_root_disconnect(musb); |
645 | musb_platform_try_idle(musb, jiffies | |
646 | + msecs_to_jiffies(musb->a_wait_bcon | |
647 | ? : OTG_TIME_A_WAIT_BCON)); | |
648 | ||
649 | break; | |
1c25fda4 AM |
650 | case OTG_STATE_B_IDLE: |
651 | if (!musb->is_active) | |
652 | break; | |
653 | case OTG_STATE_B_PERIPHERAL: | |
654 | musb_g_suspend(musb); | |
eee3f15d | 655 | musb->is_active = musb->g.b_hnp_enable; |
1c25fda4 | 656 | if (musb->is_active) { |
e47d9254 | 657 | musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON; |
5c8a86e1 | 658 | dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n"); |
1c25fda4 AM |
659 | mod_timer(&musb->otg_timer, jiffies |
660 | + msecs_to_jiffies( | |
661 | OTG_TIME_B_ASE0_BRST)); | |
1c25fda4 AM |
662 | } |
663 | break; | |
664 | case OTG_STATE_A_WAIT_BCON: | |
665 | if (musb->a_wait_bcon != 0) | |
666 | musb_platform_try_idle(musb, jiffies | |
667 | + msecs_to_jiffies(musb->a_wait_bcon)); | |
668 | break; | |
669 | case OTG_STATE_A_HOST: | |
e47d9254 | 670 | musb->xceiv->otg->state = OTG_STATE_A_SUSPEND; |
eee3f15d | 671 | musb->is_active = musb->hcd->self.b_hnp_enable; |
1c25fda4 AM |
672 | break; |
673 | case OTG_STATE_B_HOST: | |
674 | /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ | |
5c8a86e1 | 675 | dev_dbg(musb->controller, "REVISIT: SUSPEND as B_HOST\n"); |
1c25fda4 AM |
676 | break; |
677 | default: | |
678 | /* "should not happen" */ | |
679 | musb->is_active = 0; | |
680 | break; | |
681 | } | |
682 | } | |
683 | ||
550a7375 | 684 | if (int_usb & MUSB_INTR_CONNECT) { |
8b125df5 | 685 | struct usb_hcd *hcd = musb->hcd; |
550a7375 FB |
686 | |
687 | handled = IRQ_HANDLED; | |
688 | musb->is_active = 1; | |
550a7375 FB |
689 | |
690 | musb->ep0_stage = MUSB_EP0_START; | |
691 | ||
550a7375 FB |
692 | /* flush endpoints when transitioning from Device Mode */ |
693 | if (is_peripheral_active(musb)) { | |
694 | /* REVISIT HNP; just force disconnect */ | |
695 | } | |
b18d26f6 SAS |
696 | musb->intrtxe = musb->epmask; |
697 | musb_writew(musb->mregs, MUSB_INTRTXE, musb->intrtxe); | |
af5ec14d SAS |
698 | musb->intrrxe = musb->epmask & 0xfffe; |
699 | musb_writew(musb->mregs, MUSB_INTRRXE, musb->intrrxe); | |
d709d22e | 700 | musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7); |
550a7375 FB |
701 | musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED |
702 | |USB_PORT_STAT_HIGH_SPEED | |
703 | |USB_PORT_STAT_ENABLE | |
704 | ); | |
705 | musb->port1_status |= USB_PORT_STAT_CONNECTION | |
706 | |(USB_PORT_STAT_C_CONNECTION << 16); | |
707 | ||
708 | /* high vs full speed is just a guess until after reset */ | |
709 | if (devctl & MUSB_DEVCTL_LSDEV) | |
710 | musb->port1_status |= USB_PORT_STAT_LOW_SPEED; | |
711 | ||
550a7375 | 712 | /* indicate new connection to OTG machine */ |
e47d9254 | 713 | switch (musb->xceiv->otg->state) { |
550a7375 FB |
714 | case OTG_STATE_B_PERIPHERAL: |
715 | if (int_usb & MUSB_INTR_SUSPEND) { | |
5c8a86e1 | 716 | dev_dbg(musb->controller, "HNP: SUSPEND+CONNECT, now b_host\n"); |
550a7375 | 717 | int_usb &= ~MUSB_INTR_SUSPEND; |
1de00dae | 718 | goto b_host; |
550a7375 | 719 | } else |
5c8a86e1 | 720 | dev_dbg(musb->controller, "CONNECT as b_peripheral???\n"); |
550a7375 FB |
721 | break; |
722 | case OTG_STATE_B_WAIT_ACON: | |
5c8a86e1 | 723 | dev_dbg(musb->controller, "HNP: CONNECT, now b_host\n"); |
1de00dae | 724 | b_host: |
e47d9254 | 725 | musb->xceiv->otg->state = OTG_STATE_B_HOST; |
74c2e936 DM |
726 | if (musb->hcd) |
727 | musb->hcd->self.is_b_host = 1; | |
1de00dae | 728 | del_timer(&musb->otg_timer); |
550a7375 FB |
729 | break; |
730 | default: | |
731 | if ((devctl & MUSB_DEVCTL_VBUS) | |
732 | == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { | |
e47d9254 | 733 | musb->xceiv->otg->state = OTG_STATE_A_HOST; |
0b3eba44 DM |
734 | if (hcd) |
735 | hcd->self.is_b_host = 0; | |
550a7375 FB |
736 | } |
737 | break; | |
738 | } | |
1de00dae | 739 | |
0b3eba44 | 740 | musb_host_poke_root_hub(musb); |
1de00dae | 741 | |
5c8a86e1 | 742 | dev_dbg(musb->controller, "CONNECT (%s) devctl %02x\n", |
e47d9254 | 743 | usb_otg_state_string(musb->xceiv->otg->state), devctl); |
550a7375 | 744 | } |
550a7375 | 745 | |
6d349671 | 746 | if (int_usb & MUSB_INTR_DISCONNECT) { |
5c8a86e1 | 747 | dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n", |
e47d9254 | 748 | usb_otg_state_string(musb->xceiv->otg->state), |
1c25fda4 AM |
749 | MUSB_MODE(musb), devctl); |
750 | handled = IRQ_HANDLED; | |
751 | ||
e47d9254 | 752 | switch (musb->xceiv->otg->state) { |
1c25fda4 AM |
753 | case OTG_STATE_A_HOST: |
754 | case OTG_STATE_A_SUSPEND: | |
0b3eba44 | 755 | musb_host_resume_root_hub(musb); |
1c25fda4 | 756 | musb_root_disconnect(musb); |
032ec49f | 757 | if (musb->a_wait_bcon != 0) |
1c25fda4 AM |
758 | musb_platform_try_idle(musb, jiffies |
759 | + msecs_to_jiffies(musb->a_wait_bcon)); | |
760 | break; | |
1c25fda4 AM |
761 | case OTG_STATE_B_HOST: |
762 | /* REVISIT this behaves for "real disconnect" | |
763 | * cases; make sure the other transitions from | |
764 | * from B_HOST act right too. The B_HOST code | |
765 | * in hnp_stop() is currently not used... | |
766 | */ | |
767 | musb_root_disconnect(musb); | |
74c2e936 DM |
768 | if (musb->hcd) |
769 | musb->hcd->self.is_b_host = 0; | |
e47d9254 | 770 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; |
1c25fda4 AM |
771 | MUSB_DEV_MODE(musb); |
772 | musb_g_disconnect(musb); | |
773 | break; | |
774 | case OTG_STATE_A_PERIPHERAL: | |
775 | musb_hnp_stop(musb); | |
776 | musb_root_disconnect(musb); | |
777 | /* FALLTHROUGH */ | |
778 | case OTG_STATE_B_WAIT_ACON: | |
779 | /* FALLTHROUGH */ | |
1c25fda4 AM |
780 | case OTG_STATE_B_PERIPHERAL: |
781 | case OTG_STATE_B_IDLE: | |
782 | musb_g_disconnect(musb); | |
783 | break; | |
1c25fda4 AM |
784 | default: |
785 | WARNING("unhandled DISCONNECT transition (%s)\n", | |
e47d9254 | 786 | usb_otg_state_string(musb->xceiv->otg->state)); |
1c25fda4 AM |
787 | break; |
788 | } | |
789 | } | |
790 | ||
550a7375 FB |
791 | /* mentor saves a bit: bus reset and babble share the same irq. |
792 | * only host sees babble; only peripheral sees bus reset. | |
793 | */ | |
794 | if (int_usb & MUSB_INTR_RESET) { | |
1c25fda4 | 795 | handled = IRQ_HANDLED; |
a04d46d0 | 796 | if ((devctl & MUSB_DEVCTL_HM) != 0) { |
550a7375 FB |
797 | /* |
798 | * Looks like non-HS BABBLE can be ignored, but | |
799 | * HS BABBLE is an error condition. For HS the solution | |
800 | * is to avoid babble in the first place and fix what | |
801 | * caused BABBLE. When HS BABBLE happens we can only | |
802 | * stop the session. | |
803 | */ | |
804 | if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV)) | |
5c8a86e1 | 805 | dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl); |
550a7375 FB |
806 | else { |
807 | ERR("Stopping host session -- babble\n"); | |
1c25fda4 | 808 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
550a7375 | 809 | } |
a04d46d0 | 810 | } else { |
5c8a86e1 | 811 | dev_dbg(musb->controller, "BUS RESET as %s\n", |
e47d9254 AT |
812 | usb_otg_state_string(musb->xceiv->otg->state)); |
813 | switch (musb->xceiv->otg->state) { | |
550a7375 | 814 | case OTG_STATE_A_SUSPEND: |
550a7375 FB |
815 | musb_g_reset(musb); |
816 | /* FALLTHROUGH */ | |
817 | case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ | |
f7f9d63e | 818 | /* never use invalid T(a_wait_bcon) */ |
5c8a86e1 | 819 | dev_dbg(musb->controller, "HNP: in %s, %d msec timeout\n", |
e47d9254 | 820 | usb_otg_state_string(musb->xceiv->otg->state), |
3df00453 | 821 | TA_WAIT_BCON(musb)); |
f7f9d63e DB |
822 | mod_timer(&musb->otg_timer, jiffies |
823 | + msecs_to_jiffies(TA_WAIT_BCON(musb))); | |
550a7375 FB |
824 | break; |
825 | case OTG_STATE_A_PERIPHERAL: | |
1de00dae DB |
826 | del_timer(&musb->otg_timer); |
827 | musb_g_reset(musb); | |
550a7375 FB |
828 | break; |
829 | case OTG_STATE_B_WAIT_ACON: | |
5c8a86e1 | 830 | dev_dbg(musb->controller, "HNP: RESET (%s), to b_peripheral\n", |
e47d9254 AT |
831 | usb_otg_state_string(musb->xceiv->otg->state)); |
832 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; | |
550a7375 FB |
833 | musb_g_reset(musb); |
834 | break; | |
550a7375 | 835 | case OTG_STATE_B_IDLE: |
e47d9254 | 836 | musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
837 | /* FALLTHROUGH */ |
838 | case OTG_STATE_B_PERIPHERAL: | |
839 | musb_g_reset(musb); | |
840 | break; | |
841 | default: | |
5c8a86e1 | 842 | dev_dbg(musb->controller, "Unhandled BUS RESET as %s\n", |
e47d9254 | 843 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
844 | } |
845 | } | |
550a7375 | 846 | } |
550a7375 | 847 | |
ca88fc2e | 848 | /* handle babble condition */ |
97b4129e | 849 | if (int_usb & MUSB_INTR_BABBLE && is_host_active(musb)) |
675ae763 GC |
850 | schedule_delayed_work(&musb->recover_work, |
851 | msecs_to_jiffies(100)); | |
ca88fc2e | 852 | |
550a7375 FB |
853 | #if 0 |
854 | /* REVISIT ... this would be for multiplexing periodic endpoints, or | |
855 | * supporting transfer phasing to prevent exceeding ISO bandwidth | |
856 | * limits of a given frame or microframe. | |
857 | * | |
858 | * It's not needed for peripheral side, which dedicates endpoints; | |
859 | * though it _might_ use SOF irqs for other purposes. | |
860 | * | |
861 | * And it's not currently needed for host side, which also dedicates | |
862 | * endpoints, relies on TX/RX interval registers, and isn't claimed | |
863 | * to support ISO transfers yet. | |
864 | */ | |
865 | if (int_usb & MUSB_INTR_SOF) { | |
866 | void __iomem *mbase = musb->mregs; | |
867 | struct musb_hw_ep *ep; | |
868 | u8 epnum; | |
869 | u16 frame; | |
870 | ||
5c8a86e1 | 871 | dev_dbg(musb->controller, "START_OF_FRAME\n"); |
550a7375 FB |
872 | handled = IRQ_HANDLED; |
873 | ||
874 | /* start any periodic Tx transfers waiting for current frame */ | |
875 | frame = musb_readw(mbase, MUSB_FRAME); | |
876 | ep = musb->endpoints; | |
877 | for (epnum = 1; (epnum < musb->nr_endpoints) | |
878 | && (musb->epmask >= (1 << epnum)); | |
879 | epnum++, ep++) { | |
880 | /* | |
881 | * FIXME handle framecounter wraps (12 bits) | |
882 | * eliminate duplicated StartUrb logic | |
883 | */ | |
884 | if (ep->dwWaitFrame >= frame) { | |
885 | ep->dwWaitFrame = 0; | |
886 | pr_debug("SOF --> periodic TX%s on %d\n", | |
887 | ep->tx_channel ? " DMA" : "", | |
888 | epnum); | |
889 | if (!ep->tx_channel) | |
890 | musb_h_tx_start(musb, epnum); | |
891 | else | |
892 | cppi_hostdma_start(musb, epnum); | |
893 | } | |
894 | } /* end of for loop */ | |
895 | } | |
896 | #endif | |
897 | ||
1c25fda4 | 898 | schedule_work(&musb->irq_work); |
550a7375 FB |
899 | |
900 | return handled; | |
901 | } | |
902 | ||
903 | /*-------------------------------------------------------------------------*/ | |
904 | ||
550a7375 FB |
905 | static void musb_generic_disable(struct musb *musb) |
906 | { | |
907 | void __iomem *mbase = musb->mregs; | |
908 | u16 temp; | |
909 | ||
910 | /* disable interrupts */ | |
911 | musb_writeb(mbase, MUSB_INTRUSBE, 0); | |
b18d26f6 | 912 | musb->intrtxe = 0; |
550a7375 | 913 | musb_writew(mbase, MUSB_INTRTXE, 0); |
af5ec14d | 914 | musb->intrrxe = 0; |
550a7375 FB |
915 | musb_writew(mbase, MUSB_INTRRXE, 0); |
916 | ||
917 | /* off */ | |
918 | musb_writeb(mbase, MUSB_DEVCTL, 0); | |
919 | ||
920 | /* flush pending interrupts */ | |
921 | temp = musb_readb(mbase, MUSB_INTRUSB); | |
922 | temp = musb_readw(mbase, MUSB_INTRTX); | |
923 | temp = musb_readw(mbase, MUSB_INTRRX); | |
924 | ||
925 | } | |
926 | ||
001dd84a SAS |
927 | /* |
928 | * Program the HDRC to start (enable interrupts, dma, etc.). | |
929 | */ | |
930 | void musb_start(struct musb *musb) | |
931 | { | |
932 | void __iomem *regs = musb->mregs; | |
933 | u8 devctl = musb_readb(regs, MUSB_DEVCTL); | |
934 | ||
935 | dev_dbg(musb->controller, "<== devctl %02x\n", devctl); | |
936 | ||
937 | /* Set INT enable registers, enable interrupts */ | |
938 | musb->intrtxe = musb->epmask; | |
939 | musb_writew(regs, MUSB_INTRTXE, musb->intrtxe); | |
940 | musb->intrrxe = musb->epmask & 0xfffe; | |
941 | musb_writew(regs, MUSB_INTRRXE, musb->intrrxe); | |
942 | musb_writeb(regs, MUSB_INTRUSBE, 0xf7); | |
943 | ||
944 | musb_writeb(regs, MUSB_TESTMODE, 0); | |
945 | ||
946 | /* put into basic highspeed mode and start session */ | |
947 | musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE | |
948 | | MUSB_POWER_HSENAB | |
949 | /* ENSUSPEND wedges tusb */ | |
950 | /* | MUSB_POWER_ENSUSPEND */ | |
951 | ); | |
952 | ||
953 | musb->is_active = 0; | |
954 | devctl = musb_readb(regs, MUSB_DEVCTL); | |
955 | devctl &= ~MUSB_DEVCTL_SESSION; | |
956 | ||
957 | /* session started after: | |
958 | * (a) ID-grounded irq, host mode; | |
959 | * (b) vbus present/connect IRQ, peripheral mode; | |
960 | * (c) peripheral initiates, using SRP | |
961 | */ | |
962 | if (musb->port_mode != MUSB_PORT_MODE_HOST && | |
963 | (devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) { | |
964 | musb->is_active = 1; | |
965 | } else { | |
966 | devctl |= MUSB_DEVCTL_SESSION; | |
967 | } | |
968 | ||
969 | musb_platform_enable(musb); | |
970 | musb_writeb(regs, MUSB_DEVCTL, devctl); | |
971 | } | |
972 | ||
550a7375 FB |
973 | /* |
974 | * Make the HDRC stop (disable interrupts, etc.); | |
975 | * reversible by musb_start | |
976 | * called on gadget driver unregister | |
977 | * with controller locked, irqs blocked | |
978 | * acts as a NOP unless some role activated the hardware | |
979 | */ | |
980 | void musb_stop(struct musb *musb) | |
981 | { | |
982 | /* stop IRQs, timers, ... */ | |
983 | musb_platform_disable(musb); | |
984 | musb_generic_disable(musb); | |
5c8a86e1 | 985 | dev_dbg(musb->controller, "HDRC disabled\n"); |
550a7375 FB |
986 | |
987 | /* FIXME | |
988 | * - mark host and/or peripheral drivers unusable/inactive | |
989 | * - disable DMA (and enable it in HdrcStart) | |
990 | * - make sure we can musb_start() after musb_stop(); with | |
991 | * OTG mode, gadget driver module rmmod/modprobe cycles that | |
992 | * - ... | |
993 | */ | |
994 | musb_platform_try_idle(musb, 0); | |
995 | } | |
996 | ||
997 | static void musb_shutdown(struct platform_device *pdev) | |
998 | { | |
999 | struct musb *musb = dev_to_musb(&pdev->dev); | |
1000 | unsigned long flags; | |
1001 | ||
4f9edd2d | 1002 | pm_runtime_get_sync(musb->controller); |
24307cae | 1003 | |
2cc65fea | 1004 | musb_host_cleanup(musb); |
24307cae GI |
1005 | musb_gadget_cleanup(musb); |
1006 | ||
550a7375 FB |
1007 | spin_lock_irqsave(&musb->lock, flags); |
1008 | musb_platform_disable(musb); | |
1009 | musb_generic_disable(musb); | |
550a7375 FB |
1010 | spin_unlock_irqrestore(&musb->lock, flags); |
1011 | ||
120d074c GI |
1012 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
1013 | musb_platform_exit(musb); | |
120d074c | 1014 | |
4f9edd2d | 1015 | pm_runtime_put(musb->controller); |
550a7375 FB |
1016 | /* FIXME power down */ |
1017 | } | |
1018 | ||
1019 | ||
1020 | /*-------------------------------------------------------------------------*/ | |
1021 | ||
1022 | /* | |
1023 | * The silicon either has hard-wired endpoint configurations, or else | |
1024 | * "dynamic fifo" sizing. The driver has support for both, though at this | |
c767c1c6 DB |
1025 | * writing only the dynamic sizing is very well tested. Since we switched |
1026 | * away from compile-time hardware parameters, we can no longer rely on | |
1027 | * dead code elimination to leave only the relevant one in the object file. | |
550a7375 FB |
1028 | * |
1029 | * We don't currently use dynamic fifo setup capability to do anything | |
1030 | * more than selecting one of a bunch of predefined configurations. | |
1031 | */ | |
ee34e51a FB |
1032 | #if defined(CONFIG_USB_MUSB_TUSB6010) \ |
1033 | || defined(CONFIG_USB_MUSB_TUSB6010_MODULE) \ | |
1034 | || defined(CONFIG_USB_MUSB_OMAP2PLUS) \ | |
1035 | || defined(CONFIG_USB_MUSB_OMAP2PLUS_MODULE) \ | |
1036 | || defined(CONFIG_USB_MUSB_AM35X) \ | |
9ecb8875 AKG |
1037 | || defined(CONFIG_USB_MUSB_AM35X_MODULE) \ |
1038 | || defined(CONFIG_USB_MUSB_DSPS) \ | |
1039 | || defined(CONFIG_USB_MUSB_DSPS_MODULE) | |
d3608b6d | 1040 | static ushort fifo_mode = 4; |
ee34e51a FB |
1041 | #elif defined(CONFIG_USB_MUSB_UX500) \ |
1042 | || defined(CONFIG_USB_MUSB_UX500_MODULE) | |
d3608b6d | 1043 | static ushort fifo_mode = 5; |
550a7375 | 1044 | #else |
d3608b6d | 1045 | static ushort fifo_mode = 2; |
550a7375 FB |
1046 | #endif |
1047 | ||
1048 | /* "modprobe ... fifo_mode=1" etc */ | |
1049 | module_param(fifo_mode, ushort, 0); | |
1050 | MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration"); | |
1051 | ||
550a7375 FB |
1052 | /* |
1053 | * tables defining fifo_mode values. define more if you like. | |
1054 | * for host side, make sure both halves of ep1 are set up. | |
1055 | */ | |
1056 | ||
1057 | /* mode 0 - fits in 2KB */ | |
d3608b6d | 1058 | static struct musb_fifo_cfg mode_0_cfg[] = { |
550a7375 FB |
1059 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
1060 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1061 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, }, | |
1062 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1063 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1064 | }; | |
1065 | ||
1066 | /* mode 1 - fits in 4KB */ | |
d3608b6d | 1067 | static struct musb_fifo_cfg mode_1_cfg[] = { |
550a7375 FB |
1068 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
1069 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1070 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1071 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1072 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1073 | }; | |
1074 | ||
1075 | /* mode 2 - fits in 4KB */ | |
d3608b6d | 1076 | static struct musb_fifo_cfg mode_2_cfg[] = { |
550a7375 FB |
1077 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
1078 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1079 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1080 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1081 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1082 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1083 | }; | |
1084 | ||
1085 | /* mode 3 - fits in 4KB */ | |
d3608b6d | 1086 | static struct musb_fifo_cfg mode_3_cfg[] = { |
550a7375 FB |
1087 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
1088 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1089 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1090 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1091 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1092 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1093 | }; | |
1094 | ||
1095 | /* mode 4 - fits in 16KB */ | |
d3608b6d | 1096 | static struct musb_fifo_cfg mode_4_cfg[] = { |
550a7375 FB |
1097 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
1098 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1099 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1100 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1101 | { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, | |
1102 | { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, | |
1103 | { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, | |
1104 | { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, | |
1105 | { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, | |
1106 | { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, | |
1107 | { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, }, | |
1108 | { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, }, | |
1109 | { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, }, | |
1110 | { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, }, | |
1111 | { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, }, | |
1112 | { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, }, | |
1113 | { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, }, | |
1114 | { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, }, | |
a483d706 AKG |
1115 | { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, }, |
1116 | { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, }, | |
1117 | { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, }, | |
1118 | { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, }, | |
1119 | { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, }, | |
1120 | { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, }, | |
1121 | { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, }, | |
550a7375 FB |
1122 | { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, |
1123 | { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, | |
1124 | }; | |
1125 | ||
3b151526 | 1126 | /* mode 5 - fits in 8KB */ |
d3608b6d | 1127 | static struct musb_fifo_cfg mode_5_cfg[] = { |
3b151526 AKG |
1128 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
1129 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1130 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1131 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1132 | { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, | |
1133 | { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, | |
1134 | { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, | |
1135 | { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, | |
1136 | { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, | |
1137 | { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, | |
1138 | { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, }, | |
1139 | { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, }, | |
1140 | { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, }, | |
1141 | { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, }, | |
1142 | { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, }, | |
1143 | { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, }, | |
1144 | { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, }, | |
1145 | { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, }, | |
1146 | { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, }, | |
1147 | { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, }, | |
1148 | { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, }, | |
1149 | { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, }, | |
1150 | { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, }, | |
1151 | { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, }, | |
1152 | { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, }, | |
1153 | { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, | |
1154 | { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, | |
1155 | }; | |
550a7375 FB |
1156 | |
1157 | /* | |
1158 | * configure a fifo; for non-shared endpoints, this may be called | |
1159 | * once for a tx fifo and once for an rx fifo. | |
1160 | * | |
1161 | * returns negative errno or offset for next fifo. | |
1162 | */ | |
41ac7b3a | 1163 | static int |
550a7375 | 1164 | fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep, |
e6c213b2 | 1165 | const struct musb_fifo_cfg *cfg, u16 offset) |
550a7375 FB |
1166 | { |
1167 | void __iomem *mbase = musb->mregs; | |
1168 | int size = 0; | |
1169 | u16 maxpacket = cfg->maxpacket; | |
1170 | u16 c_off = offset >> 3; | |
1171 | u8 c_size; | |
1172 | ||
1173 | /* expect hw_ep has already been zero-initialized */ | |
1174 | ||
1175 | size = ffs(max(maxpacket, (u16) 8)) - 1; | |
1176 | maxpacket = 1 << size; | |
1177 | ||
1178 | c_size = size - 3; | |
1179 | if (cfg->mode == BUF_DOUBLE) { | |
ca6d1b13 FB |
1180 | if ((offset + (maxpacket << 1)) > |
1181 | (1 << (musb->config->ram_bits + 2))) | |
550a7375 FB |
1182 | return -EMSGSIZE; |
1183 | c_size |= MUSB_FIFOSZ_DPB; | |
1184 | } else { | |
ca6d1b13 | 1185 | if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2))) |
550a7375 FB |
1186 | return -EMSGSIZE; |
1187 | } | |
1188 | ||
1189 | /* configure the FIFO */ | |
1190 | musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum); | |
1191 | ||
550a7375 | 1192 | /* EP0 reserved endpoint for control, bidirectional; |
5ae477b0 | 1193 | * EP1 reserved for bulk, two unidirectional halves. |
550a7375 FB |
1194 | */ |
1195 | if (hw_ep->epnum == 1) | |
1196 | musb->bulk_ep = hw_ep; | |
1197 | /* REVISIT error check: be sure ep0 can both rx and tx ... */ | |
550a7375 FB |
1198 | switch (cfg->style) { |
1199 | case FIFO_TX: | |
c6cf8b00 BW |
1200 | musb_write_txfifosz(mbase, c_size); |
1201 | musb_write_txfifoadd(mbase, c_off); | |
550a7375 FB |
1202 | hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1203 | hw_ep->max_packet_sz_tx = maxpacket; | |
1204 | break; | |
1205 | case FIFO_RX: | |
c6cf8b00 BW |
1206 | musb_write_rxfifosz(mbase, c_size); |
1207 | musb_write_rxfifoadd(mbase, c_off); | |
550a7375 FB |
1208 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1209 | hw_ep->max_packet_sz_rx = maxpacket; | |
1210 | break; | |
1211 | case FIFO_RXTX: | |
c6cf8b00 BW |
1212 | musb_write_txfifosz(mbase, c_size); |
1213 | musb_write_txfifoadd(mbase, c_off); | |
550a7375 FB |
1214 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1215 | hw_ep->max_packet_sz_rx = maxpacket; | |
1216 | ||
c6cf8b00 BW |
1217 | musb_write_rxfifosz(mbase, c_size); |
1218 | musb_write_rxfifoadd(mbase, c_off); | |
550a7375 FB |
1219 | hw_ep->tx_double_buffered = hw_ep->rx_double_buffered; |
1220 | hw_ep->max_packet_sz_tx = maxpacket; | |
1221 | ||
1222 | hw_ep->is_shared_fifo = true; | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | /* NOTE rx and tx endpoint irqs aren't managed separately, | |
1227 | * which happens to be ok | |
1228 | */ | |
1229 | musb->epmask |= (1 << hw_ep->epnum); | |
1230 | ||
1231 | return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0)); | |
1232 | } | |
1233 | ||
d3608b6d | 1234 | static struct musb_fifo_cfg ep0_cfg = { |
550a7375 FB |
1235 | .style = FIFO_RXTX, .maxpacket = 64, |
1236 | }; | |
1237 | ||
41ac7b3a | 1238 | static int ep_config_from_table(struct musb *musb) |
550a7375 | 1239 | { |
e6c213b2 | 1240 | const struct musb_fifo_cfg *cfg; |
550a7375 FB |
1241 | unsigned i, n; |
1242 | int offset; | |
1243 | struct musb_hw_ep *hw_ep = musb->endpoints; | |
1244 | ||
e6c213b2 FB |
1245 | if (musb->config->fifo_cfg) { |
1246 | cfg = musb->config->fifo_cfg; | |
1247 | n = musb->config->fifo_cfg_size; | |
1248 | goto done; | |
1249 | } | |
1250 | ||
550a7375 FB |
1251 | switch (fifo_mode) { |
1252 | default: | |
1253 | fifo_mode = 0; | |
1254 | /* FALLTHROUGH */ | |
1255 | case 0: | |
1256 | cfg = mode_0_cfg; | |
1257 | n = ARRAY_SIZE(mode_0_cfg); | |
1258 | break; | |
1259 | case 1: | |
1260 | cfg = mode_1_cfg; | |
1261 | n = ARRAY_SIZE(mode_1_cfg); | |
1262 | break; | |
1263 | case 2: | |
1264 | cfg = mode_2_cfg; | |
1265 | n = ARRAY_SIZE(mode_2_cfg); | |
1266 | break; | |
1267 | case 3: | |
1268 | cfg = mode_3_cfg; | |
1269 | n = ARRAY_SIZE(mode_3_cfg); | |
1270 | break; | |
1271 | case 4: | |
1272 | cfg = mode_4_cfg; | |
1273 | n = ARRAY_SIZE(mode_4_cfg); | |
1274 | break; | |
3b151526 AKG |
1275 | case 5: |
1276 | cfg = mode_5_cfg; | |
1277 | n = ARRAY_SIZE(mode_5_cfg); | |
1278 | break; | |
550a7375 FB |
1279 | } |
1280 | ||
1281 | printk(KERN_DEBUG "%s: setup fifo_mode %d\n", | |
1282 | musb_driver_name, fifo_mode); | |
1283 | ||
1284 | ||
e6c213b2 | 1285 | done: |
550a7375 FB |
1286 | offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0); |
1287 | /* assert(offset > 0) */ | |
1288 | ||
1289 | /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would | |
ca6d1b13 | 1290 | * be better than static musb->config->num_eps and DYN_FIFO_SIZE... |
550a7375 FB |
1291 | */ |
1292 | ||
1293 | for (i = 0; i < n; i++) { | |
1294 | u8 epn = cfg->hw_ep_num; | |
1295 | ||
ca6d1b13 | 1296 | if (epn >= musb->config->num_eps) { |
550a7375 FB |
1297 | pr_debug("%s: invalid ep %d\n", |
1298 | musb_driver_name, epn); | |
bb1c9ef1 | 1299 | return -EINVAL; |
550a7375 FB |
1300 | } |
1301 | offset = fifo_setup(musb, hw_ep + epn, cfg++, offset); | |
1302 | if (offset < 0) { | |
1303 | pr_debug("%s: mem overrun, ep %d\n", | |
1304 | musb_driver_name, epn); | |
f69dfa1f | 1305 | return offset; |
550a7375 FB |
1306 | } |
1307 | epn++; | |
1308 | musb->nr_endpoints = max(epn, musb->nr_endpoints); | |
1309 | } | |
1310 | ||
1311 | printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n", | |
1312 | musb_driver_name, | |
ca6d1b13 FB |
1313 | n + 1, musb->config->num_eps * 2 - 1, |
1314 | offset, (1 << (musb->config->ram_bits + 2))); | |
550a7375 | 1315 | |
550a7375 FB |
1316 | if (!musb->bulk_ep) { |
1317 | pr_debug("%s: missing bulk\n", musb_driver_name); | |
1318 | return -EINVAL; | |
1319 | } | |
550a7375 FB |
1320 | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | ||
1325 | /* | |
1326 | * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false | |
1327 | * @param musb the controller | |
1328 | */ | |
41ac7b3a | 1329 | static int ep_config_from_hw(struct musb *musb) |
550a7375 | 1330 | { |
c6cf8b00 | 1331 | u8 epnum = 0; |
550a7375 | 1332 | struct musb_hw_ep *hw_ep; |
a156544b | 1333 | void __iomem *mbase = musb->mregs; |
c6cf8b00 | 1334 | int ret = 0; |
550a7375 | 1335 | |
5c8a86e1 | 1336 | dev_dbg(musb->controller, "<== static silicon ep config\n"); |
550a7375 FB |
1337 | |
1338 | /* FIXME pick up ep0 maxpacket size */ | |
1339 | ||
ca6d1b13 | 1340 | for (epnum = 1; epnum < musb->config->num_eps; epnum++) { |
550a7375 FB |
1341 | musb_ep_select(mbase, epnum); |
1342 | hw_ep = musb->endpoints + epnum; | |
1343 | ||
c6cf8b00 BW |
1344 | ret = musb_read_fifosize(musb, hw_ep, epnum); |
1345 | if (ret < 0) | |
550a7375 | 1346 | break; |
550a7375 FB |
1347 | |
1348 | /* FIXME set up hw_ep->{rx,tx}_double_buffered */ | |
1349 | ||
550a7375 FB |
1350 | /* pick an RX/TX endpoint for bulk */ |
1351 | if (hw_ep->max_packet_sz_tx < 512 | |
1352 | || hw_ep->max_packet_sz_rx < 512) | |
1353 | continue; | |
1354 | ||
1355 | /* REVISIT: this algorithm is lazy, we should at least | |
1356 | * try to pick a double buffered endpoint. | |
1357 | */ | |
1358 | if (musb->bulk_ep) | |
1359 | continue; | |
1360 | musb->bulk_ep = hw_ep; | |
550a7375 FB |
1361 | } |
1362 | ||
550a7375 FB |
1363 | if (!musb->bulk_ep) { |
1364 | pr_debug("%s: missing bulk\n", musb_driver_name); | |
1365 | return -EINVAL; | |
1366 | } | |
550a7375 FB |
1367 | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, }; | |
1372 | ||
1373 | /* Initialize MUSB (M)HDRC part of the USB hardware subsystem; | |
1374 | * configure endpoints, or take their config from silicon | |
1375 | */ | |
41ac7b3a | 1376 | static int musb_core_init(u16 musb_type, struct musb *musb) |
550a7375 | 1377 | { |
550a7375 FB |
1378 | u8 reg; |
1379 | char *type; | |
0ea52ff4 | 1380 | char aInfo[90], aRevision[32], aDate[12]; |
550a7375 FB |
1381 | void __iomem *mbase = musb->mregs; |
1382 | int status = 0; | |
1383 | int i; | |
1384 | ||
1385 | /* log core options (read using indexed model) */ | |
c6cf8b00 | 1386 | reg = musb_read_configdata(mbase); |
550a7375 FB |
1387 | |
1388 | strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8"); | |
51bf0d0e | 1389 | if (reg & MUSB_CONFIGDATA_DYNFIFO) { |
550a7375 | 1390 | strcat(aInfo, ", dyn FIFOs"); |
51bf0d0e AKG |
1391 | musb->dyn_fifo = true; |
1392 | } | |
550a7375 FB |
1393 | if (reg & MUSB_CONFIGDATA_MPRXE) { |
1394 | strcat(aInfo, ", bulk combine"); | |
550a7375 | 1395 | musb->bulk_combine = true; |
550a7375 FB |
1396 | } |
1397 | if (reg & MUSB_CONFIGDATA_MPTXE) { | |
1398 | strcat(aInfo, ", bulk split"); | |
550a7375 | 1399 | musb->bulk_split = true; |
550a7375 FB |
1400 | } |
1401 | if (reg & MUSB_CONFIGDATA_HBRXE) { | |
1402 | strcat(aInfo, ", HB-ISO Rx"); | |
a483d706 | 1403 | musb->hb_iso_rx = true; |
550a7375 FB |
1404 | } |
1405 | if (reg & MUSB_CONFIGDATA_HBTXE) { | |
1406 | strcat(aInfo, ", HB-ISO Tx"); | |
a483d706 | 1407 | musb->hb_iso_tx = true; |
550a7375 FB |
1408 | } |
1409 | if (reg & MUSB_CONFIGDATA_SOFTCONE) | |
1410 | strcat(aInfo, ", SoftConn"); | |
1411 | ||
1412 | printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n", | |
1413 | musb_driver_name, reg, aInfo); | |
1414 | ||
550a7375 | 1415 | aDate[0] = 0; |
550a7375 FB |
1416 | if (MUSB_CONTROLLER_MHDRC == musb_type) { |
1417 | musb->is_multipoint = 1; | |
1418 | type = "M"; | |
1419 | } else { | |
1420 | musb->is_multipoint = 0; | |
1421 | type = ""; | |
550a7375 FB |
1422 | #ifndef CONFIG_USB_OTG_BLACKLIST_HUB |
1423 | printk(KERN_ERR | |
1424 | "%s: kernel must blacklist external hubs\n", | |
1425 | musb_driver_name); | |
550a7375 FB |
1426 | #endif |
1427 | } | |
1428 | ||
1429 | /* log release info */ | |
32c3b94e AG |
1430 | musb->hwvers = musb_read_hwvers(mbase); |
1431 | snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers), | |
1432 | MUSB_HWVERS_MINOR(musb->hwvers), | |
1433 | (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : ""); | |
550a7375 FB |
1434 | printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n", |
1435 | musb_driver_name, type, aRevision, aDate); | |
1436 | ||
1437 | /* configure ep0 */ | |
c6cf8b00 | 1438 | musb_configure_ep0(musb); |
550a7375 FB |
1439 | |
1440 | /* discover endpoint configuration */ | |
1441 | musb->nr_endpoints = 1; | |
1442 | musb->epmask = 1; | |
1443 | ||
ad517e9e FB |
1444 | if (musb->dyn_fifo) |
1445 | status = ep_config_from_table(musb); | |
1446 | else | |
1447 | status = ep_config_from_hw(musb); | |
550a7375 FB |
1448 | |
1449 | if (status < 0) | |
1450 | return status; | |
1451 | ||
1452 | /* finish init, and print endpoint config */ | |
1453 | for (i = 0; i < musb->nr_endpoints; i++) { | |
1454 | struct musb_hw_ep *hw_ep = musb->endpoints + i; | |
1455 | ||
1456 | hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase; | |
9a35f876 | 1457 | #if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE) |
550a7375 FB |
1458 | hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i); |
1459 | hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i); | |
1460 | hw_ep->fifo_sync_va = | |
1461 | musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i); | |
1462 | ||
1463 | if (i == 0) | |
1464 | hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF; | |
1465 | else | |
1466 | hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2); | |
1467 | #endif | |
1468 | ||
1469 | hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase; | |
c6cf8b00 | 1470 | hw_ep->target_regs = musb_read_target_reg_base(i, mbase); |
550a7375 FB |
1471 | hw_ep->rx_reinit = 1; |
1472 | hw_ep->tx_reinit = 1; | |
550a7375 FB |
1473 | |
1474 | if (hw_ep->max_packet_sz_tx) { | |
5c8a86e1 | 1475 | dev_dbg(musb->controller, |
550a7375 FB |
1476 | "%s: hw_ep %d%s, %smax %d\n", |
1477 | musb_driver_name, i, | |
1478 | hw_ep->is_shared_fifo ? "shared" : "tx", | |
1479 | hw_ep->tx_double_buffered | |
1480 | ? "doublebuffer, " : "", | |
1481 | hw_ep->max_packet_sz_tx); | |
1482 | } | |
1483 | if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) { | |
5c8a86e1 | 1484 | dev_dbg(musb->controller, |
550a7375 FB |
1485 | "%s: hw_ep %d%s, %smax %d\n", |
1486 | musb_driver_name, i, | |
1487 | "rx", | |
1488 | hw_ep->rx_double_buffered | |
1489 | ? "doublebuffer, " : "", | |
1490 | hw_ep->max_packet_sz_rx); | |
1491 | } | |
1492 | if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx)) | |
5c8a86e1 | 1493 | dev_dbg(musb->controller, "hw_ep %d not configured\n", i); |
550a7375 FB |
1494 | } |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /*-------------------------------------------------------------------------*/ | |
1500 | ||
550a7375 FB |
1501 | /* |
1502 | * handle all the irqs defined by the HDRC core. for now we expect: other | |
1503 | * irq sources (phy, dma, etc) will be handled first, musb->int_* values | |
1504 | * will be assigned, and the irq will already have been acked. | |
1505 | * | |
1506 | * called in irq context with spinlock held, irqs blocked | |
1507 | */ | |
1508 | irqreturn_t musb_interrupt(struct musb *musb) | |
1509 | { | |
1510 | irqreturn_t retval = IRQ_NONE; | |
b11e94d0 | 1511 | u8 devctl; |
550a7375 FB |
1512 | int ep_num; |
1513 | u32 reg; | |
1514 | ||
1515 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); | |
550a7375 | 1516 | |
5c8a86e1 | 1517 | dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n", |
c03da38d | 1518 | is_host_active(musb) ? "host" : "peripheral", |
550a7375 FB |
1519 | musb->int_usb, musb->int_tx, musb->int_rx); |
1520 | ||
1521 | /* the core can interrupt us for multiple reasons; docs have | |
1522 | * a generic interrupt flowchart to follow | |
1523 | */ | |
7d9645fd | 1524 | if (musb->int_usb) |
550a7375 | 1525 | retval |= musb_stage0_irq(musb, musb->int_usb, |
b11e94d0 | 1526 | devctl); |
550a7375 FB |
1527 | |
1528 | /* "stage 1" is handling endpoint irqs */ | |
1529 | ||
1530 | /* handle endpoint 0 first */ | |
1531 | if (musb->int_tx & 1) { | |
c03da38d | 1532 | if (is_host_active(musb)) |
550a7375 FB |
1533 | retval |= musb_h_ep0_irq(musb); |
1534 | else | |
1535 | retval |= musb_g_ep0_irq(musb); | |
1536 | } | |
1537 | ||
1538 | /* RX on endpoints 1-15 */ | |
1539 | reg = musb->int_rx >> 1; | |
1540 | ep_num = 1; | |
1541 | while (reg) { | |
1542 | if (reg & 1) { | |
1543 | /* musb_ep_select(musb->mregs, ep_num); */ | |
1544 | /* REVISIT just retval = ep->rx_irq(...) */ | |
1545 | retval = IRQ_HANDLED; | |
c03da38d | 1546 | if (is_host_active(musb)) |
a04d46d0 FB |
1547 | musb_host_rx(musb, ep_num); |
1548 | else | |
1549 | musb_g_rx(musb, ep_num); | |
550a7375 FB |
1550 | } |
1551 | ||
1552 | reg >>= 1; | |
1553 | ep_num++; | |
1554 | } | |
1555 | ||
1556 | /* TX on endpoints 1-15 */ | |
1557 | reg = musb->int_tx >> 1; | |
1558 | ep_num = 1; | |
1559 | while (reg) { | |
1560 | if (reg & 1) { | |
1561 | /* musb_ep_select(musb->mregs, ep_num); */ | |
1562 | /* REVISIT just retval |= ep->tx_irq(...) */ | |
1563 | retval = IRQ_HANDLED; | |
c03da38d | 1564 | if (is_host_active(musb)) |
a04d46d0 FB |
1565 | musb_host_tx(musb, ep_num); |
1566 | else | |
1567 | musb_g_tx(musb, ep_num); | |
550a7375 FB |
1568 | } |
1569 | reg >>= 1; | |
1570 | ep_num++; | |
1571 | } | |
1572 | ||
550a7375 FB |
1573 | return retval; |
1574 | } | |
981430a1 | 1575 | EXPORT_SYMBOL_GPL(musb_interrupt); |
550a7375 FB |
1576 | |
1577 | #ifndef CONFIG_MUSB_PIO_ONLY | |
d3608b6d | 1578 | static bool use_dma = 1; |
550a7375 FB |
1579 | |
1580 | /* "modprobe ... use_dma=0" etc */ | |
1581 | module_param(use_dma, bool, 0); | |
1582 | MODULE_PARM_DESC(use_dma, "enable/disable use of DMA"); | |
1583 | ||
1584 | void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit) | |
1585 | { | |
550a7375 FB |
1586 | /* called with controller lock already held */ |
1587 | ||
1588 | if (!epnum) { | |
1589 | #ifndef CONFIG_USB_TUSB_OMAP_DMA | |
1590 | if (!is_cppi_enabled()) { | |
1591 | /* endpoint 0 */ | |
c03da38d | 1592 | if (is_host_active(musb)) |
550a7375 FB |
1593 | musb_h_ep0_irq(musb); |
1594 | else | |
1595 | musb_g_ep0_irq(musb); | |
1596 | } | |
1597 | #endif | |
1598 | } else { | |
1599 | /* endpoints 1..15 */ | |
1600 | if (transmit) { | |
c03da38d | 1601 | if (is_host_active(musb)) |
a04d46d0 FB |
1602 | musb_host_tx(musb, epnum); |
1603 | else | |
1604 | musb_g_tx(musb, epnum); | |
550a7375 FB |
1605 | } else { |
1606 | /* receive */ | |
c03da38d | 1607 | if (is_host_active(musb)) |
a04d46d0 FB |
1608 | musb_host_rx(musb, epnum); |
1609 | else | |
1610 | musb_g_rx(musb, epnum); | |
550a7375 FB |
1611 | } |
1612 | } | |
1613 | } | |
9a35f876 | 1614 | EXPORT_SYMBOL_GPL(musb_dma_completion); |
550a7375 FB |
1615 | |
1616 | #else | |
1617 | #define use_dma 0 | |
1618 | #endif | |
1619 | ||
1620 | /*-------------------------------------------------------------------------*/ | |
1621 | ||
550a7375 FB |
1622 | static ssize_t |
1623 | musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1624 | { | |
1625 | struct musb *musb = dev_to_musb(dev); | |
1626 | unsigned long flags; | |
1627 | int ret = -EINVAL; | |
1628 | ||
1629 | spin_lock_irqsave(&musb->lock, flags); | |
e47d9254 | 1630 | ret = sprintf(buf, "%s\n", usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
1631 | spin_unlock_irqrestore(&musb->lock, flags); |
1632 | ||
1633 | return ret; | |
1634 | } | |
1635 | ||
1636 | static ssize_t | |
1637 | musb_mode_store(struct device *dev, struct device_attribute *attr, | |
1638 | const char *buf, size_t n) | |
1639 | { | |
1640 | struct musb *musb = dev_to_musb(dev); | |
1641 | unsigned long flags; | |
96a274d1 | 1642 | int status; |
550a7375 FB |
1643 | |
1644 | spin_lock_irqsave(&musb->lock, flags); | |
96a274d1 DB |
1645 | if (sysfs_streq(buf, "host")) |
1646 | status = musb_platform_set_mode(musb, MUSB_HOST); | |
1647 | else if (sysfs_streq(buf, "peripheral")) | |
1648 | status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); | |
1649 | else if (sysfs_streq(buf, "otg")) | |
1650 | status = musb_platform_set_mode(musb, MUSB_OTG); | |
1651 | else | |
1652 | status = -EINVAL; | |
550a7375 FB |
1653 | spin_unlock_irqrestore(&musb->lock, flags); |
1654 | ||
96a274d1 | 1655 | return (status == 0) ? n : status; |
550a7375 FB |
1656 | } |
1657 | static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store); | |
1658 | ||
1659 | static ssize_t | |
1660 | musb_vbus_store(struct device *dev, struct device_attribute *attr, | |
1661 | const char *buf, size_t n) | |
1662 | { | |
1663 | struct musb *musb = dev_to_musb(dev); | |
1664 | unsigned long flags; | |
1665 | unsigned long val; | |
1666 | ||
1667 | if (sscanf(buf, "%lu", &val) < 1) { | |
b3b1cc3b | 1668 | dev_err(dev, "Invalid VBUS timeout ms value\n"); |
550a7375 FB |
1669 | return -EINVAL; |
1670 | } | |
1671 | ||
1672 | spin_lock_irqsave(&musb->lock, flags); | |
f7f9d63e DB |
1673 | /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */ |
1674 | musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ; | |
e47d9254 | 1675 | if (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON) |
550a7375 FB |
1676 | musb->is_active = 0; |
1677 | musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val)); | |
1678 | spin_unlock_irqrestore(&musb->lock, flags); | |
1679 | ||
1680 | return n; | |
1681 | } | |
1682 | ||
1683 | static ssize_t | |
1684 | musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1685 | { | |
1686 | struct musb *musb = dev_to_musb(dev); | |
1687 | unsigned long flags; | |
1688 | unsigned long val; | |
1689 | int vbus; | |
1690 | ||
1691 | spin_lock_irqsave(&musb->lock, flags); | |
1692 | val = musb->a_wait_bcon; | |
f7f9d63e DB |
1693 | /* FIXME get_vbus_status() is normally #defined as false... |
1694 | * and is effectively TUSB-specific. | |
1695 | */ | |
550a7375 FB |
1696 | vbus = musb_platform_get_vbus_status(musb); |
1697 | spin_unlock_irqrestore(&musb->lock, flags); | |
1698 | ||
f7f9d63e | 1699 | return sprintf(buf, "Vbus %s, timeout %lu msec\n", |
550a7375 FB |
1700 | vbus ? "on" : "off", val); |
1701 | } | |
1702 | static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store); | |
1703 | ||
550a7375 FB |
1704 | /* Gadget drivers can't know that a host is connected so they might want |
1705 | * to start SRP, but users can. This allows userspace to trigger SRP. | |
1706 | */ | |
1707 | static ssize_t | |
1708 | musb_srp_store(struct device *dev, struct device_attribute *attr, | |
1709 | const char *buf, size_t n) | |
1710 | { | |
1711 | struct musb *musb = dev_to_musb(dev); | |
1712 | unsigned short srp; | |
1713 | ||
1714 | if (sscanf(buf, "%hu", &srp) != 1 | |
1715 | || (srp != 1)) { | |
b3b1cc3b | 1716 | dev_err(dev, "SRP: Value must be 1\n"); |
550a7375 FB |
1717 | return -EINVAL; |
1718 | } | |
1719 | ||
1720 | if (srp == 1) | |
1721 | musb_g_wakeup(musb); | |
1722 | ||
1723 | return n; | |
1724 | } | |
1725 | static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store); | |
1726 | ||
94375751 FB |
1727 | static struct attribute *musb_attributes[] = { |
1728 | &dev_attr_mode.attr, | |
1729 | &dev_attr_vbus.attr, | |
94375751 | 1730 | &dev_attr_srp.attr, |
94375751 FB |
1731 | NULL |
1732 | }; | |
1733 | ||
1734 | static const struct attribute_group musb_attr_group = { | |
1735 | .attrs = musb_attributes, | |
1736 | }; | |
1737 | ||
550a7375 FB |
1738 | /* Only used to provide driver mode change events */ |
1739 | static void musb_irq_work(struct work_struct *data) | |
1740 | { | |
1741 | struct musb *musb = container_of(data, struct musb, irq_work); | |
550a7375 | 1742 | |
e47d9254 AT |
1743 | if (musb->xceiv->otg->state != musb->xceiv_old_state) { |
1744 | musb->xceiv_old_state = musb->xceiv->otg->state; | |
550a7375 FB |
1745 | sysfs_notify(&musb->controller->kobj, NULL, "mode"); |
1746 | } | |
1747 | } | |
1748 | ||
ca88fc2e DM |
1749 | /* Recover from babble interrupt conditions */ |
1750 | static void musb_recover_work(struct work_struct *data) | |
1751 | { | |
675ae763 | 1752 | struct musb *musb = container_of(data, struct musb, recover_work.work); |
d871c622 | 1753 | int status, ret; |
ca88fc2e | 1754 | |
d871c622 GC |
1755 | ret = musb_platform_reset(musb); |
1756 | if (ret) | |
1757 | return; | |
ca88fc2e DM |
1758 | |
1759 | usb_phy_vbus_off(musb->xceiv); | |
675ae763 | 1760 | usleep_range(100, 200); |
ca88fc2e DM |
1761 | |
1762 | usb_phy_vbus_on(musb->xceiv); | |
675ae763 | 1763 | usleep_range(100, 200); |
ca88fc2e DM |
1764 | |
1765 | /* | |
d871c622 GC |
1766 | * When a babble condition occurs, the musb controller |
1767 | * removes the session bit and the endpoint config is lost. | |
ca88fc2e DM |
1768 | */ |
1769 | if (musb->dyn_fifo) | |
1770 | status = ep_config_from_table(musb); | |
1771 | else | |
1772 | status = ep_config_from_hw(musb); | |
1773 | ||
1774 | /* start the session again */ | |
1775 | if (status == 0) | |
1776 | musb_start(musb); | |
1777 | } | |
1778 | ||
550a7375 FB |
1779 | /* -------------------------------------------------------------------------- |
1780 | * Init support | |
1781 | */ | |
1782 | ||
41ac7b3a | 1783 | static struct musb *allocate_instance(struct device *dev, |
ca6d1b13 | 1784 | struct musb_hdrc_config *config, void __iomem *mbase) |
550a7375 FB |
1785 | { |
1786 | struct musb *musb; | |
1787 | struct musb_hw_ep *ep; | |
1788 | int epnum; | |
74c2e936 | 1789 | int ret; |
550a7375 | 1790 | |
74c2e936 DM |
1791 | musb = devm_kzalloc(dev, sizeof(*musb), GFP_KERNEL); |
1792 | if (!musb) | |
550a7375 | 1793 | return NULL; |
550a7375 | 1794 | |
550a7375 FB |
1795 | INIT_LIST_HEAD(&musb->control); |
1796 | INIT_LIST_HEAD(&musb->in_bulk); | |
1797 | INIT_LIST_HEAD(&musb->out_bulk); | |
1798 | ||
550a7375 | 1799 | musb->vbuserr_retry = VBUSERR_RETRY_COUNT; |
f7f9d63e | 1800 | musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON; |
550a7375 FB |
1801 | musb->mregs = mbase; |
1802 | musb->ctrl_base = mbase; | |
1803 | musb->nIrq = -ENODEV; | |
ca6d1b13 | 1804 | musb->config = config; |
02582b92 | 1805 | BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS); |
550a7375 | 1806 | for (epnum = 0, ep = musb->endpoints; |
ca6d1b13 | 1807 | epnum < musb->config->num_eps; |
550a7375 | 1808 | epnum++, ep++) { |
550a7375 FB |
1809 | ep->musb = musb; |
1810 | ep->epnum = epnum; | |
1811 | } | |
1812 | ||
1813 | musb->controller = dev; | |
743411b3 | 1814 | |
74c2e936 DM |
1815 | ret = musb_host_alloc(musb); |
1816 | if (ret < 0) | |
1817 | goto err_free; | |
1818 | ||
1819 | dev_set_drvdata(dev, musb); | |
1820 | ||
550a7375 | 1821 | return musb; |
74c2e936 DM |
1822 | |
1823 | err_free: | |
1824 | return NULL; | |
550a7375 FB |
1825 | } |
1826 | ||
1827 | static void musb_free(struct musb *musb) | |
1828 | { | |
1829 | /* this has multiple entry modes. it handles fault cleanup after | |
1830 | * probe(), where things may be partially set up, as well as rmmod | |
1831 | * cleanup after everything's been de-activated. | |
1832 | */ | |
1833 | ||
1834 | #ifdef CONFIG_SYSFS | |
94375751 | 1835 | sysfs_remove_group(&musb->controller->kobj, &musb_attr_group); |
550a7375 FB |
1836 | #endif |
1837 | ||
97a39896 AKG |
1838 | if (musb->nIrq >= 0) { |
1839 | if (musb->irq_wake) | |
1840 | disable_irq_wake(musb->nIrq); | |
550a7375 FB |
1841 | free_irq(musb->nIrq, musb); |
1842 | } | |
550a7375 | 1843 | |
74c2e936 | 1844 | musb_host_free(musb); |
550a7375 FB |
1845 | } |
1846 | ||
8ed1fb79 DM |
1847 | static void musb_deassert_reset(struct work_struct *work) |
1848 | { | |
1849 | struct musb *musb; | |
1850 | unsigned long flags; | |
1851 | ||
1852 | musb = container_of(work, struct musb, deassert_reset_work.work); | |
1853 | ||
1854 | spin_lock_irqsave(&musb->lock, flags); | |
1855 | ||
1856 | if (musb->port1_status & USB_PORT_STAT_RESET) | |
1857 | musb_port_reset(musb, false); | |
1858 | ||
1859 | spin_unlock_irqrestore(&musb->lock, flags); | |
1860 | } | |
1861 | ||
550a7375 FB |
1862 | /* |
1863 | * Perform generic per-controller initialization. | |
1864 | * | |
28dd924a SS |
1865 | * @dev: the controller (already clocked, etc) |
1866 | * @nIrq: IRQ number | |
1867 | * @ctrl: virtual address of controller registers, | |
550a7375 FB |
1868 | * not yet corrected for platform-specific offsets |
1869 | */ | |
41ac7b3a | 1870 | static int |
550a7375 FB |
1871 | musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) |
1872 | { | |
1873 | int status; | |
1874 | struct musb *musb; | |
c1a7d67c | 1875 | struct musb_hdrc_platform_data *plat = dev_get_platdata(dev); |
550a7375 FB |
1876 | |
1877 | /* The driver might handle more features than the board; OK. | |
1878 | * Fail when the board needs a feature that's not enabled. | |
1879 | */ | |
1880 | if (!plat) { | |
1881 | dev_dbg(dev, "no platform_data?\n"); | |
34e2beb2 SS |
1882 | status = -ENODEV; |
1883 | goto fail0; | |
550a7375 | 1884 | } |
34e2beb2 | 1885 | |
550a7375 | 1886 | /* allocate */ |
ca6d1b13 | 1887 | musb = allocate_instance(dev, plat->config, ctrl); |
34e2beb2 SS |
1888 | if (!musb) { |
1889 | status = -ENOMEM; | |
1890 | goto fail0; | |
1891 | } | |
550a7375 | 1892 | |
7acc6197 HH |
1893 | pm_runtime_use_autosuspend(musb->controller); |
1894 | pm_runtime_set_autosuspend_delay(musb->controller, 200); | |
1895 | pm_runtime_enable(musb->controller); | |
1896 | ||
550a7375 | 1897 | spin_lock_init(&musb->lock); |
550a7375 | 1898 | musb->board_set_power = plat->set_power; |
550a7375 | 1899 | musb->min_power = plat->min_power; |
f7ec9437 | 1900 | musb->ops = plat->platform_ops; |
9ad96e69 | 1901 | musb->port_mode = plat->mode; |
550a7375 | 1902 | |
84e250ff | 1903 | /* The musb_platform_init() call: |
baef653a PDS |
1904 | * - adjusts musb->mregs |
1905 | * - sets the musb->isr | |
5ae477b0 | 1906 | * - may initialize an integrated transceiver |
721002ec | 1907 | * - initializes musb->xceiv, usually by otg_get_phy() |
84e250ff | 1908 | * - stops powering VBUS |
84e250ff | 1909 | * |
7c9d440e | 1910 | * There are various transceiver configurations. Blackfin, |
84e250ff DB |
1911 | * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses |
1912 | * external/discrete ones in various flavors (twl4030 family, | |
1913 | * isp1504, non-OTG, etc) mostly hooking up through ULPI. | |
550a7375 | 1914 | */ |
ea65df57 | 1915 | status = musb_platform_init(musb); |
550a7375 | 1916 | if (status < 0) |
03491761 | 1917 | goto fail1; |
34e2beb2 | 1918 | |
550a7375 FB |
1919 | if (!musb->isr) { |
1920 | status = -ENODEV; | |
c04352a5 | 1921 | goto fail2; |
550a7375 FB |
1922 | } |
1923 | ||
ffb865b1 | 1924 | if (!musb->xceiv->io_ops) { |
bf070bc1 | 1925 | musb->xceiv->io_dev = musb->controller; |
ffb865b1 HK |
1926 | musb->xceiv->io_priv = musb->mregs; |
1927 | musb->xceiv->io_ops = &musb_ulpi_access; | |
1928 | } | |
1929 | ||
c04352a5 GI |
1930 | pm_runtime_get_sync(musb->controller); |
1931 | ||
48054147 | 1932 | if (use_dma && dev->dma_mask) { |
66c01883 | 1933 | musb->dma_controller = dma_controller_create(musb, musb->mregs); |
48054147 SAS |
1934 | if (IS_ERR(musb->dma_controller)) { |
1935 | status = PTR_ERR(musb->dma_controller); | |
1936 | goto fail2_5; | |
1937 | } | |
1938 | } | |
550a7375 FB |
1939 | |
1940 | /* be sure interrupts are disabled before connecting ISR */ | |
1941 | musb_platform_disable(musb); | |
1942 | musb_generic_disable(musb); | |
1943 | ||
66fadea5 SAS |
1944 | /* Init IRQ workqueue before request_irq */ |
1945 | INIT_WORK(&musb->irq_work, musb_irq_work); | |
675ae763 | 1946 | INIT_DELAYED_WORK(&musb->recover_work, musb_recover_work); |
8ed1fb79 DM |
1947 | INIT_DELAYED_WORK(&musb->deassert_reset_work, musb_deassert_reset); |
1948 | INIT_DELAYED_WORK(&musb->finish_resume_work, musb_host_finish_resume); | |
66fadea5 | 1949 | |
550a7375 | 1950 | /* setup musb parts of the core (especially endpoints) */ |
ca6d1b13 | 1951 | status = musb_core_init(plat->config->multipoint |
550a7375 FB |
1952 | ? MUSB_CONTROLLER_MHDRC |
1953 | : MUSB_CONTROLLER_HDRC, musb); | |
1954 | if (status < 0) | |
34e2beb2 | 1955 | goto fail3; |
550a7375 | 1956 | |
f7f9d63e | 1957 | setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb); |
f7f9d63e | 1958 | |
550a7375 | 1959 | /* attach to the IRQ */ |
427c4f33 | 1960 | if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) { |
550a7375 FB |
1961 | dev_err(dev, "request_irq %d failed!\n", nIrq); |
1962 | status = -ENODEV; | |
34e2beb2 | 1963 | goto fail3; |
550a7375 FB |
1964 | } |
1965 | musb->nIrq = nIrq; | |
032ec49f | 1966 | /* FIXME this handles wakeup irqs wrong */ |
c48a5155 FB |
1967 | if (enable_irq_wake(nIrq) == 0) { |
1968 | musb->irq_wake = 1; | |
550a7375 | 1969 | device_init_wakeup(dev, 1); |
c48a5155 FB |
1970 | } else { |
1971 | musb->irq_wake = 0; | |
1972 | } | |
550a7375 | 1973 | |
032ec49f FB |
1974 | /* program PHY to use external vBus if required */ |
1975 | if (plat->extvbus) { | |
1976 | u8 busctl = musb_read_ulpi_buscontrol(musb->mregs); | |
1977 | busctl |= MUSB_ULPI_USE_EXTVBUS; | |
1978 | musb_write_ulpi_buscontrol(musb->mregs, busctl); | |
550a7375 | 1979 | } |
550a7375 | 1980 | |
e5615112 GI |
1981 | if (musb->xceiv->otg->default_a) { |
1982 | MUSB_HST_MODE(musb); | |
e47d9254 | 1983 | musb->xceiv->otg->state = OTG_STATE_A_IDLE; |
e5615112 GI |
1984 | } else { |
1985 | MUSB_DEV_MODE(musb); | |
e47d9254 | 1986 | musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
e5615112 | 1987 | } |
550a7375 | 1988 | |
6c5f6a6f DM |
1989 | switch (musb->port_mode) { |
1990 | case MUSB_PORT_MODE_HOST: | |
1991 | status = musb_host_setup(musb, plat->power); | |
2df6761e FB |
1992 | if (status < 0) |
1993 | goto fail3; | |
1994 | status = musb_platform_set_mode(musb, MUSB_HOST); | |
6c5f6a6f DM |
1995 | break; |
1996 | case MUSB_PORT_MODE_GADGET: | |
1997 | status = musb_gadget_setup(musb); | |
2df6761e FB |
1998 | if (status < 0) |
1999 | goto fail3; | |
2000 | status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); | |
6c5f6a6f DM |
2001 | break; |
2002 | case MUSB_PORT_MODE_DUAL_ROLE: | |
2003 | status = musb_host_setup(musb, plat->power); | |
2004 | if (status < 0) | |
2005 | goto fail3; | |
2006 | status = musb_gadget_setup(musb); | |
2df6761e | 2007 | if (status) { |
0d2dd7ea | 2008 | musb_host_cleanup(musb); |
2df6761e FB |
2009 | goto fail3; |
2010 | } | |
2011 | status = musb_platform_set_mode(musb, MUSB_OTG); | |
6c5f6a6f DM |
2012 | break; |
2013 | default: | |
2014 | dev_err(dev, "unsupported port mode %d\n", musb->port_mode); | |
2015 | break; | |
2016 | } | |
550a7375 | 2017 | |
461972d8 | 2018 | if (status < 0) |
34e2beb2 | 2019 | goto fail3; |
550a7375 | 2020 | |
7f7f9e2a FB |
2021 | status = musb_init_debugfs(musb); |
2022 | if (status < 0) | |
b0f9da7e | 2023 | goto fail4; |
7f7f9e2a | 2024 | |
94375751 | 2025 | status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group); |
28c2c51c | 2026 | if (status) |
b0f9da7e | 2027 | goto fail5; |
550a7375 | 2028 | |
c04352a5 GI |
2029 | pm_runtime_put(musb->controller); |
2030 | ||
28c2c51c | 2031 | return 0; |
550a7375 | 2032 | |
b0f9da7e FB |
2033 | fail5: |
2034 | musb_exit_debugfs(musb); | |
2035 | ||
34e2beb2 | 2036 | fail4: |
032ec49f | 2037 | musb_gadget_cleanup(musb); |
0d2dd7ea | 2038 | musb_host_cleanup(musb); |
34e2beb2 SS |
2039 | |
2040 | fail3: | |
66fadea5 | 2041 | cancel_work_sync(&musb->irq_work); |
675ae763 | 2042 | cancel_delayed_work_sync(&musb->recover_work); |
8ed1fb79 DM |
2043 | cancel_delayed_work_sync(&musb->finish_resume_work); |
2044 | cancel_delayed_work_sync(&musb->deassert_reset_work); | |
f3ce4d5b SAS |
2045 | if (musb->dma_controller) |
2046 | dma_controller_destroy(musb->dma_controller); | |
48054147 | 2047 | fail2_5: |
c04352a5 GI |
2048 | pm_runtime_put_sync(musb->controller); |
2049 | ||
2050 | fail2: | |
34e2beb2 SS |
2051 | if (musb->irq_wake) |
2052 | device_init_wakeup(dev, 0); | |
550a7375 | 2053 | musb_platform_exit(musb); |
28c2c51c | 2054 | |
34e2beb2 | 2055 | fail1: |
681d1e87 | 2056 | pm_runtime_disable(musb->controller); |
34e2beb2 SS |
2057 | dev_err(musb->controller, |
2058 | "musb_init_controller failed with status %d\n", status); | |
2059 | ||
28c2c51c FB |
2060 | musb_free(musb); |
2061 | ||
34e2beb2 SS |
2062 | fail0: |
2063 | ||
28c2c51c FB |
2064 | return status; |
2065 | ||
550a7375 FB |
2066 | } |
2067 | ||
2068 | /*-------------------------------------------------------------------------*/ | |
2069 | ||
2070 | /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just | |
2071 | * bridge to a platform device; this driver then suffices. | |
2072 | */ | |
41ac7b3a | 2073 | static int musb_probe(struct platform_device *pdev) |
550a7375 FB |
2074 | { |
2075 | struct device *dev = &pdev->dev; | |
fcf173e4 | 2076 | int irq = platform_get_irq_byname(pdev, "mc"); |
550a7375 FB |
2077 | struct resource *iomem; |
2078 | void __iomem *base; | |
2079 | ||
1f79b26c | 2080 | if (irq <= 0) |
550a7375 FB |
2081 | return -ENODEV; |
2082 | ||
1f79b26c | 2083 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
b42f7f30 FB |
2084 | base = devm_ioremap_resource(dev, iomem); |
2085 | if (IS_ERR(base)) | |
2086 | return PTR_ERR(base); | |
550a7375 | 2087 | |
b42f7f30 | 2088 | return musb_init_controller(dev, irq, base); |
550a7375 FB |
2089 | } |
2090 | ||
fb4e98ab | 2091 | static int musb_remove(struct platform_device *pdev) |
550a7375 | 2092 | { |
8d2421e6 AKG |
2093 | struct device *dev = &pdev->dev; |
2094 | struct musb *musb = dev_to_musb(dev); | |
550a7375 FB |
2095 | |
2096 | /* this gets called on rmmod. | |
2097 | * - Host mode: host may still be active | |
2098 | * - Peripheral mode: peripheral is deactivated (or never-activated) | |
2099 | * - OTG mode: both roles are deactivated (or never-activated) | |
2100 | */ | |
7f7f9e2a | 2101 | musb_exit_debugfs(musb); |
550a7375 | 2102 | musb_shutdown(pdev); |
461972d8 | 2103 | |
8d1aad74 SAS |
2104 | if (musb->dma_controller) |
2105 | dma_controller_destroy(musb->dma_controller); | |
2106 | ||
66fadea5 | 2107 | cancel_work_sync(&musb->irq_work); |
675ae763 | 2108 | cancel_delayed_work_sync(&musb->recover_work); |
8ed1fb79 DM |
2109 | cancel_delayed_work_sync(&musb->finish_resume_work); |
2110 | cancel_delayed_work_sync(&musb->deassert_reset_work); | |
550a7375 | 2111 | musb_free(musb); |
8d2421e6 | 2112 | device_init_wakeup(dev, 0); |
550a7375 FB |
2113 | return 0; |
2114 | } | |
2115 | ||
2116 | #ifdef CONFIG_PM | |
2117 | ||
3c8a5fcc | 2118 | static void musb_save_context(struct musb *musb) |
4f712e01 AKG |
2119 | { |
2120 | int i; | |
2121 | void __iomem *musb_base = musb->mregs; | |
ae9b2ad2 | 2122 | void __iomem *epio; |
4f712e01 | 2123 | |
032ec49f FB |
2124 | musb->context.frame = musb_readw(musb_base, MUSB_FRAME); |
2125 | musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE); | |
2126 | musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs); | |
7421107b | 2127 | musb->context.power = musb_readb(musb_base, MUSB_POWER); |
7421107b FB |
2128 | musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE); |
2129 | musb->context.index = musb_readb(musb_base, MUSB_INDEX); | |
2130 | musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL); | |
4f712e01 | 2131 | |
ae9b2ad2 | 2132 | for (i = 0; i < musb->config->num_eps; ++i) { |
e4e5b136 FB |
2133 | struct musb_hw_ep *hw_ep; |
2134 | ||
2135 | hw_ep = &musb->endpoints[i]; | |
2136 | if (!hw_ep) | |
2137 | continue; | |
2138 | ||
2139 | epio = hw_ep->regs; | |
2140 | if (!epio) | |
2141 | continue; | |
2142 | ||
ea737554 | 2143 | musb_writeb(musb_base, MUSB_INDEX, i); |
7421107b | 2144 | musb->context.index_regs[i].txmaxp = |
ae9b2ad2 | 2145 | musb_readw(epio, MUSB_TXMAXP); |
7421107b | 2146 | musb->context.index_regs[i].txcsr = |
ae9b2ad2 | 2147 | musb_readw(epio, MUSB_TXCSR); |
7421107b | 2148 | musb->context.index_regs[i].rxmaxp = |
ae9b2ad2 | 2149 | musb_readw(epio, MUSB_RXMAXP); |
7421107b | 2150 | musb->context.index_regs[i].rxcsr = |
ae9b2ad2 | 2151 | musb_readw(epio, MUSB_RXCSR); |
4f712e01 AKG |
2152 | |
2153 | if (musb->dyn_fifo) { | |
7421107b | 2154 | musb->context.index_regs[i].txfifoadd = |
4f712e01 | 2155 | musb_read_txfifoadd(musb_base); |
7421107b | 2156 | musb->context.index_regs[i].rxfifoadd = |
4f712e01 | 2157 | musb_read_rxfifoadd(musb_base); |
7421107b | 2158 | musb->context.index_regs[i].txfifosz = |
4f712e01 | 2159 | musb_read_txfifosz(musb_base); |
7421107b | 2160 | musb->context.index_regs[i].rxfifosz = |
4f712e01 AKG |
2161 | musb_read_rxfifosz(musb_base); |
2162 | } | |
032ec49f FB |
2163 | |
2164 | musb->context.index_regs[i].txtype = | |
2165 | musb_readb(epio, MUSB_TXTYPE); | |
2166 | musb->context.index_regs[i].txinterval = | |
2167 | musb_readb(epio, MUSB_TXINTERVAL); | |
2168 | musb->context.index_regs[i].rxtype = | |
2169 | musb_readb(epio, MUSB_RXTYPE); | |
2170 | musb->context.index_regs[i].rxinterval = | |
2171 | musb_readb(epio, MUSB_RXINTERVAL); | |
2172 | ||
2173 | musb->context.index_regs[i].txfunaddr = | |
2174 | musb_read_txfunaddr(musb_base, i); | |
2175 | musb->context.index_regs[i].txhubaddr = | |
2176 | musb_read_txhubaddr(musb_base, i); | |
2177 | musb->context.index_regs[i].txhubport = | |
2178 | musb_read_txhubport(musb_base, i); | |
2179 | ||
2180 | musb->context.index_regs[i].rxfunaddr = | |
2181 | musb_read_rxfunaddr(musb_base, i); | |
2182 | musb->context.index_regs[i].rxhubaddr = | |
2183 | musb_read_rxhubaddr(musb_base, i); | |
2184 | musb->context.index_regs[i].rxhubport = | |
2185 | musb_read_rxhubport(musb_base, i); | |
4f712e01 | 2186 | } |
4f712e01 AKG |
2187 | } |
2188 | ||
3c8a5fcc | 2189 | static void musb_restore_context(struct musb *musb) |
4f712e01 AKG |
2190 | { |
2191 | int i; | |
2192 | void __iomem *musb_base = musb->mregs; | |
2193 | void __iomem *ep_target_regs; | |
ae9b2ad2 | 2194 | void __iomem *epio; |
33f8d75f | 2195 | u8 power; |
4f712e01 | 2196 | |
032ec49f FB |
2197 | musb_writew(musb_base, MUSB_FRAME, musb->context.frame); |
2198 | musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode); | |
2199 | musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl); | |
33f8d75f RQ |
2200 | |
2201 | /* Don't affect SUSPENDM/RESUME bits in POWER reg */ | |
2202 | power = musb_readb(musb_base, MUSB_POWER); | |
2203 | power &= MUSB_POWER_SUSPENDM | MUSB_POWER_RESUME; | |
2204 | musb->context.power &= ~(MUSB_POWER_SUSPENDM | MUSB_POWER_RESUME); | |
2205 | power |= musb->context.power; | |
2206 | musb_writeb(musb_base, MUSB_POWER, power); | |
2207 | ||
b18d26f6 | 2208 | musb_writew(musb_base, MUSB_INTRTXE, musb->intrtxe); |
af5ec14d | 2209 | musb_writew(musb_base, MUSB_INTRRXE, musb->intrrxe); |
7421107b FB |
2210 | musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe); |
2211 | musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl); | |
4f712e01 | 2212 | |
ae9b2ad2 | 2213 | for (i = 0; i < musb->config->num_eps; ++i) { |
e4e5b136 FB |
2214 | struct musb_hw_ep *hw_ep; |
2215 | ||
2216 | hw_ep = &musb->endpoints[i]; | |
2217 | if (!hw_ep) | |
2218 | continue; | |
2219 | ||
2220 | epio = hw_ep->regs; | |
2221 | if (!epio) | |
2222 | continue; | |
2223 | ||
ea737554 | 2224 | musb_writeb(musb_base, MUSB_INDEX, i); |
ae9b2ad2 | 2225 | musb_writew(epio, MUSB_TXMAXP, |
7421107b | 2226 | musb->context.index_regs[i].txmaxp); |
ae9b2ad2 | 2227 | musb_writew(epio, MUSB_TXCSR, |
7421107b | 2228 | musb->context.index_regs[i].txcsr); |
ae9b2ad2 | 2229 | musb_writew(epio, MUSB_RXMAXP, |
7421107b | 2230 | musb->context.index_regs[i].rxmaxp); |
ae9b2ad2 | 2231 | musb_writew(epio, MUSB_RXCSR, |
7421107b | 2232 | musb->context.index_regs[i].rxcsr); |
4f712e01 AKG |
2233 | |
2234 | if (musb->dyn_fifo) { | |
2235 | musb_write_txfifosz(musb_base, | |
7421107b | 2236 | musb->context.index_regs[i].txfifosz); |
4f712e01 | 2237 | musb_write_rxfifosz(musb_base, |
7421107b | 2238 | musb->context.index_regs[i].rxfifosz); |
4f712e01 | 2239 | musb_write_txfifoadd(musb_base, |
7421107b | 2240 | musb->context.index_regs[i].txfifoadd); |
4f712e01 | 2241 | musb_write_rxfifoadd(musb_base, |
7421107b | 2242 | musb->context.index_regs[i].rxfifoadd); |
4f712e01 AKG |
2243 | } |
2244 | ||
032ec49f | 2245 | musb_writeb(epio, MUSB_TXTYPE, |
7421107b | 2246 | musb->context.index_regs[i].txtype); |
032ec49f | 2247 | musb_writeb(epio, MUSB_TXINTERVAL, |
7421107b | 2248 | musb->context.index_regs[i].txinterval); |
032ec49f | 2249 | musb_writeb(epio, MUSB_RXTYPE, |
7421107b | 2250 | musb->context.index_regs[i].rxtype); |
032ec49f | 2251 | musb_writeb(epio, MUSB_RXINTERVAL, |
4f712e01 | 2252 | |
032ec49f FB |
2253 | musb->context.index_regs[i].rxinterval); |
2254 | musb_write_txfunaddr(musb_base, i, | |
7421107b | 2255 | musb->context.index_regs[i].txfunaddr); |
032ec49f | 2256 | musb_write_txhubaddr(musb_base, i, |
7421107b | 2257 | musb->context.index_regs[i].txhubaddr); |
032ec49f | 2258 | musb_write_txhubport(musb_base, i, |
7421107b | 2259 | musb->context.index_regs[i].txhubport); |
4f712e01 | 2260 | |
032ec49f FB |
2261 | ep_target_regs = |
2262 | musb_read_target_reg_base(i, musb_base); | |
4f712e01 | 2263 | |
032ec49f | 2264 | musb_write_rxfunaddr(ep_target_regs, |
7421107b | 2265 | musb->context.index_regs[i].rxfunaddr); |
032ec49f | 2266 | musb_write_rxhubaddr(ep_target_regs, |
7421107b | 2267 | musb->context.index_regs[i].rxhubaddr); |
032ec49f | 2268 | musb_write_rxhubport(ep_target_regs, |
7421107b | 2269 | musb->context.index_regs[i].rxhubport); |
4f712e01 | 2270 | } |
3c5fec75 | 2271 | musb_writeb(musb_base, MUSB_INDEX, musb->context.index); |
4f712e01 AKG |
2272 | } |
2273 | ||
48fea965 | 2274 | static int musb_suspend(struct device *dev) |
550a7375 | 2275 | { |
8220796d | 2276 | struct musb *musb = dev_to_musb(dev); |
550a7375 | 2277 | unsigned long flags; |
550a7375 | 2278 | |
550a7375 FB |
2279 | spin_lock_irqsave(&musb->lock, flags); |
2280 | ||
2281 | if (is_peripheral_active(musb)) { | |
2282 | /* FIXME force disconnect unless we know USB will wake | |
2283 | * the system up quickly enough to respond ... | |
2284 | */ | |
2285 | } else if (is_host_active(musb)) { | |
2286 | /* we know all the children are suspended; sometimes | |
2287 | * they will even be wakeup-enabled. | |
2288 | */ | |
2289 | } | |
2290 | ||
c338412b DM |
2291 | musb_save_context(musb); |
2292 | ||
550a7375 FB |
2293 | spin_unlock_irqrestore(&musb->lock, flags); |
2294 | return 0; | |
2295 | } | |
2296 | ||
3e87d9a3 | 2297 | static int musb_resume(struct device *dev) |
550a7375 | 2298 | { |
c338412b | 2299 | struct musb *musb = dev_to_musb(dev); |
b87fd2f7 SAS |
2300 | u8 devctl; |
2301 | u8 mask; | |
c338412b DM |
2302 | |
2303 | /* | |
2304 | * For static cmos like DaVinci, register values were preserved | |
0ec8fd70 KK |
2305 | * unless for some reason the whole soc powered down or the USB |
2306 | * module got reset through the PSC (vs just being disabled). | |
c338412b DM |
2307 | * |
2308 | * For the DSPS glue layer though, a full register restore has to | |
2309 | * be done. As it shouldn't harm other platforms, we do it | |
2310 | * unconditionally. | |
550a7375 | 2311 | */ |
c338412b DM |
2312 | |
2313 | musb_restore_context(musb); | |
2314 | ||
b87fd2f7 SAS |
2315 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
2316 | mask = MUSB_DEVCTL_BDEVICE | MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV; | |
2317 | if ((devctl & mask) != (musb->context.devctl & mask)) | |
2318 | musb->port1_status = 0; | |
baadd52f SAS |
2319 | if (musb->need_finish_resume) { |
2320 | musb->need_finish_resume = 0; | |
2321 | schedule_delayed_work(&musb->finish_resume_work, | |
2322 | msecs_to_jiffies(20)); | |
2323 | } | |
550a7375 FB |
2324 | return 0; |
2325 | } | |
2326 | ||
7acc6197 HH |
2327 | static int musb_runtime_suspend(struct device *dev) |
2328 | { | |
2329 | struct musb *musb = dev_to_musb(dev); | |
2330 | ||
2331 | musb_save_context(musb); | |
2332 | ||
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | static int musb_runtime_resume(struct device *dev) | |
2337 | { | |
2338 | struct musb *musb = dev_to_musb(dev); | |
2339 | static int first = 1; | |
2340 | ||
2341 | /* | |
2342 | * When pm_runtime_get_sync called for the first time in driver | |
2343 | * init, some of the structure is still not initialized which is | |
2344 | * used in restore function. But clock needs to be | |
2345 | * enabled before any register access, so | |
2346 | * pm_runtime_get_sync has to be called. | |
2347 | * Also context restore without save does not make | |
2348 | * any sense | |
2349 | */ | |
2350 | if (!first) | |
2351 | musb_restore_context(musb); | |
2352 | first = 0; | |
2353 | ||
2354 | return 0; | |
2355 | } | |
2356 | ||
47145210 | 2357 | static const struct dev_pm_ops musb_dev_pm_ops = { |
48fea965 | 2358 | .suspend = musb_suspend, |
3e87d9a3 | 2359 | .resume = musb_resume, |
7acc6197 HH |
2360 | .runtime_suspend = musb_runtime_suspend, |
2361 | .runtime_resume = musb_runtime_resume, | |
48fea965 MD |
2362 | }; |
2363 | ||
2364 | #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops) | |
550a7375 | 2365 | #else |
48fea965 | 2366 | #define MUSB_DEV_PM_OPS NULL |
550a7375 FB |
2367 | #endif |
2368 | ||
2369 | static struct platform_driver musb_driver = { | |
2370 | .driver = { | |
2371 | .name = (char *)musb_driver_name, | |
2372 | .bus = &platform_bus_type, | |
2373 | .owner = THIS_MODULE, | |
48fea965 | 2374 | .pm = MUSB_DEV_PM_OPS, |
550a7375 | 2375 | }, |
e9e8c85e | 2376 | .probe = musb_probe, |
7690417d | 2377 | .remove = musb_remove, |
550a7375 | 2378 | .shutdown = musb_shutdown, |
550a7375 FB |
2379 | }; |
2380 | ||
89f836a8 | 2381 | module_platform_driver(musb_driver); |