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8b9bc460 | 1 | /** |
dfbc6fa3 AT |
2 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
3 | * http://www.samsung.com | |
5b7d70c6 BD |
4 | * |
5 | * Copyright 2008 Openmoko, Inc. | |
6 | * Copyright 2008 Simtec Electronics | |
7 | * Ben Dooks <ben@simtec.co.uk> | |
8 | * http://armlinux.simtec.co.uk/ | |
9 | * | |
10 | * S3C USB2.0 High-speed / OtG driver | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
8b9bc460 | 15 | */ |
5b7d70c6 BD |
16 | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/dma-mapping.h> | |
7ad8096e | 23 | #include <linux/mutex.h> |
5b7d70c6 BD |
24 | #include <linux/seq_file.h> |
25 | #include <linux/delay.h> | |
26 | #include <linux/io.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
e50bf385 | 28 | #include <linux/clk.h> |
fc9a731e | 29 | #include <linux/regulator/consumer.h> |
c50f056c | 30 | #include <linux/of_platform.h> |
74084844 | 31 | #include <linux/phy/phy.h> |
5b7d70c6 BD |
32 | |
33 | #include <linux/usb/ch9.h> | |
34 | #include <linux/usb/gadget.h> | |
b2e587db | 35 | #include <linux/usb/phy.h> |
126625e1 | 36 | #include <linux/platform_data/s3c-hsotg.h> |
5b7d70c6 | 37 | |
f7c0b143 | 38 | #include "core.h" |
941fcce4 | 39 | #include "hw.h" |
5b7d70c6 BD |
40 | |
41 | /* conversion functions */ | |
42 | static inline struct s3c_hsotg_req *our_req(struct usb_request *req) | |
43 | { | |
44 | return container_of(req, struct s3c_hsotg_req, req); | |
45 | } | |
46 | ||
47 | static inline struct s3c_hsotg_ep *our_ep(struct usb_ep *ep) | |
48 | { | |
49 | return container_of(ep, struct s3c_hsotg_ep, ep); | |
50 | } | |
51 | ||
941fcce4 | 52 | static inline struct dwc2_hsotg *to_hsotg(struct usb_gadget *gadget) |
5b7d70c6 | 53 | { |
941fcce4 | 54 | return container_of(gadget, struct dwc2_hsotg, gadget); |
5b7d70c6 BD |
55 | } |
56 | ||
57 | static inline void __orr32(void __iomem *ptr, u32 val) | |
58 | { | |
59 | writel(readl(ptr) | val, ptr); | |
60 | } | |
61 | ||
62 | static inline void __bic32(void __iomem *ptr, u32 val) | |
63 | { | |
64 | writel(readl(ptr) & ~val, ptr); | |
65 | } | |
66 | ||
c6f5c050 MYK |
67 | static inline struct s3c_hsotg_ep *index_to_ep(struct dwc2_hsotg *hsotg, |
68 | u32 ep_index, u32 dir_in) | |
69 | { | |
70 | if (dir_in) | |
71 | return hsotg->eps_in[ep_index]; | |
72 | else | |
73 | return hsotg->eps_out[ep_index]; | |
74 | } | |
75 | ||
997f4f81 | 76 | /* forward declaration of functions */ |
941fcce4 | 77 | static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg); |
5b7d70c6 BD |
78 | |
79 | /** | |
80 | * using_dma - return the DMA status of the driver. | |
81 | * @hsotg: The driver state. | |
82 | * | |
83 | * Return true if we're using DMA. | |
84 | * | |
85 | * Currently, we have the DMA support code worked into everywhere | |
86 | * that needs it, but the AMBA DMA implementation in the hardware can | |
87 | * only DMA from 32bit aligned addresses. This means that gadgets such | |
88 | * as the CDC Ethernet cannot work as they often pass packets which are | |
89 | * not 32bit aligned. | |
90 | * | |
91 | * Unfortunately the choice to use DMA or not is global to the controller | |
92 | * and seems to be only settable when the controller is being put through | |
93 | * a core reset. This means we either need to fix the gadgets to take | |
94 | * account of DMA alignment, or add bounce buffers (yuerk). | |
95 | * | |
edd74be8 | 96 | * g_using_dma is set depending on dts flag. |
5b7d70c6 | 97 | */ |
941fcce4 | 98 | static inline bool using_dma(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 99 | { |
edd74be8 | 100 | return hsotg->g_using_dma; |
5b7d70c6 BD |
101 | } |
102 | ||
103 | /** | |
104 | * s3c_hsotg_en_gsint - enable one or more of the general interrupt | |
105 | * @hsotg: The device state | |
106 | * @ints: A bitmask of the interrupts to enable | |
107 | */ | |
941fcce4 | 108 | static void s3c_hsotg_en_gsint(struct dwc2_hsotg *hsotg, u32 ints) |
5b7d70c6 | 109 | { |
94cb8fd6 | 110 | u32 gsintmsk = readl(hsotg->regs + GINTMSK); |
5b7d70c6 BD |
111 | u32 new_gsintmsk; |
112 | ||
113 | new_gsintmsk = gsintmsk | ints; | |
114 | ||
115 | if (new_gsintmsk != gsintmsk) { | |
116 | dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk); | |
94cb8fd6 | 117 | writel(new_gsintmsk, hsotg->regs + GINTMSK); |
5b7d70c6 BD |
118 | } |
119 | } | |
120 | ||
121 | /** | |
122 | * s3c_hsotg_disable_gsint - disable one or more of the general interrupt | |
123 | * @hsotg: The device state | |
124 | * @ints: A bitmask of the interrupts to enable | |
125 | */ | |
941fcce4 | 126 | static void s3c_hsotg_disable_gsint(struct dwc2_hsotg *hsotg, u32 ints) |
5b7d70c6 | 127 | { |
94cb8fd6 | 128 | u32 gsintmsk = readl(hsotg->regs + GINTMSK); |
5b7d70c6 BD |
129 | u32 new_gsintmsk; |
130 | ||
131 | new_gsintmsk = gsintmsk & ~ints; | |
132 | ||
133 | if (new_gsintmsk != gsintmsk) | |
94cb8fd6 | 134 | writel(new_gsintmsk, hsotg->regs + GINTMSK); |
5b7d70c6 BD |
135 | } |
136 | ||
137 | /** | |
138 | * s3c_hsotg_ctrl_epint - enable/disable an endpoint irq | |
139 | * @hsotg: The device state | |
140 | * @ep: The endpoint index | |
141 | * @dir_in: True if direction is in. | |
142 | * @en: The enable value, true to enable | |
143 | * | |
144 | * Set or clear the mask for an individual endpoint's interrupt | |
145 | * request. | |
146 | */ | |
941fcce4 | 147 | static void s3c_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
148 | unsigned int ep, unsigned int dir_in, |
149 | unsigned int en) | |
150 | { | |
151 | unsigned long flags; | |
152 | u32 bit = 1 << ep; | |
153 | u32 daint; | |
154 | ||
155 | if (!dir_in) | |
156 | bit <<= 16; | |
157 | ||
158 | local_irq_save(flags); | |
94cb8fd6 | 159 | daint = readl(hsotg->regs + DAINTMSK); |
5b7d70c6 BD |
160 | if (en) |
161 | daint |= bit; | |
162 | else | |
163 | daint &= ~bit; | |
94cb8fd6 | 164 | writel(daint, hsotg->regs + DAINTMSK); |
5b7d70c6 BD |
165 | local_irq_restore(flags); |
166 | } | |
167 | ||
168 | /** | |
169 | * s3c_hsotg_init_fifo - initialise non-periodic FIFOs | |
170 | * @hsotg: The device instance. | |
171 | */ | |
941fcce4 | 172 | static void s3c_hsotg_init_fifo(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 173 | { |
0f002d20 BD |
174 | unsigned int ep; |
175 | unsigned int addr; | |
1703a6d3 | 176 | int timeout; |
0f002d20 BD |
177 | u32 val; |
178 | ||
7fcbc95c GH |
179 | /* Reset fifo map if not correctly cleared during previous session */ |
180 | WARN_ON(hsotg->fifo_map); | |
181 | hsotg->fifo_map = 0; | |
182 | ||
0a176279 GH |
183 | /* set RX/NPTX FIFO sizes */ |
184 | writel(hsotg->g_rx_fifo_sz, hsotg->regs + GRXFSIZ); | |
185 | writel((hsotg->g_rx_fifo_sz << FIFOSIZE_STARTADDR_SHIFT) | | |
186 | (hsotg->g_np_g_tx_fifo_sz << FIFOSIZE_DEPTH_SHIFT), | |
187 | hsotg->regs + GNPTXFSIZ); | |
0f002d20 | 188 | |
8b9bc460 LM |
189 | /* |
190 | * arange all the rest of the TX FIFOs, as some versions of this | |
0f002d20 BD |
191 | * block have overlapping default addresses. This also ensures |
192 | * that if the settings have been changed, then they are set to | |
8b9bc460 LM |
193 | * known values. |
194 | */ | |
0f002d20 BD |
195 | |
196 | /* start at the end of the GNPTXFSIZ, rounded up */ | |
0a176279 | 197 | addr = hsotg->g_rx_fifo_sz + hsotg->g_np_g_tx_fifo_sz; |
0f002d20 | 198 | |
8b9bc460 | 199 | /* |
0a176279 | 200 | * Configure fifos sizes from provided configuration and assign |
b203d0a2 RB |
201 | * them to endpoints dynamically according to maxpacket size value of |
202 | * given endpoint. | |
8b9bc460 | 203 | */ |
0a176279 GH |
204 | for (ep = 1; ep < MAX_EPS_CHANNELS; ep++) { |
205 | if (!hsotg->g_tx_fifo_sz[ep]) | |
206 | continue; | |
0f002d20 | 207 | val = addr; |
0a176279 GH |
208 | val |= hsotg->g_tx_fifo_sz[ep] << FIFOSIZE_DEPTH_SHIFT; |
209 | WARN_ONCE(addr + hsotg->g_tx_fifo_sz[ep] > hsotg->fifo_mem, | |
cff9eb75 | 210 | "insufficient fifo memory"); |
0a176279 | 211 | addr += hsotg->g_tx_fifo_sz[ep]; |
0f002d20 | 212 | |
47a1685f | 213 | writel(val, hsotg->regs + DPTXFSIZN(ep)); |
0f002d20 | 214 | } |
1703a6d3 | 215 | |
8b9bc460 LM |
216 | /* |
217 | * according to p428 of the design guide, we need to ensure that | |
218 | * all fifos are flushed before continuing | |
219 | */ | |
1703a6d3 | 220 | |
47a1685f DN |
221 | writel(GRSTCTL_TXFNUM(0x10) | GRSTCTL_TXFFLSH | |
222 | GRSTCTL_RXFFLSH, hsotg->regs + GRSTCTL); | |
1703a6d3 BD |
223 | |
224 | /* wait until the fifos are both flushed */ | |
225 | timeout = 100; | |
226 | while (1) { | |
94cb8fd6 | 227 | val = readl(hsotg->regs + GRSTCTL); |
1703a6d3 | 228 | |
47a1685f | 229 | if ((val & (GRSTCTL_TXFFLSH | GRSTCTL_RXFFLSH)) == 0) |
1703a6d3 BD |
230 | break; |
231 | ||
232 | if (--timeout == 0) { | |
233 | dev_err(hsotg->dev, | |
234 | "%s: timeout flushing fifos (GRSTCTL=%08x)\n", | |
235 | __func__, val); | |
48b20bcb | 236 | break; |
1703a6d3 BD |
237 | } |
238 | ||
239 | udelay(1); | |
240 | } | |
241 | ||
242 | dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout); | |
5b7d70c6 BD |
243 | } |
244 | ||
245 | /** | |
246 | * @ep: USB endpoint to allocate request for. | |
247 | * @flags: Allocation flags | |
248 | * | |
249 | * Allocate a new USB request structure appropriate for the specified endpoint | |
250 | */ | |
0978f8c5 MB |
251 | static struct usb_request *s3c_hsotg_ep_alloc_request(struct usb_ep *ep, |
252 | gfp_t flags) | |
5b7d70c6 BD |
253 | { |
254 | struct s3c_hsotg_req *req; | |
255 | ||
256 | req = kzalloc(sizeof(struct s3c_hsotg_req), flags); | |
257 | if (!req) | |
258 | return NULL; | |
259 | ||
260 | INIT_LIST_HEAD(&req->queue); | |
261 | ||
5b7d70c6 BD |
262 | return &req->req; |
263 | } | |
264 | ||
265 | /** | |
266 | * is_ep_periodic - return true if the endpoint is in periodic mode. | |
267 | * @hs_ep: The endpoint to query. | |
268 | * | |
269 | * Returns true if the endpoint is in periodic mode, meaning it is being | |
270 | * used for an Interrupt or ISO transfer. | |
271 | */ | |
272 | static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep) | |
273 | { | |
274 | return hs_ep->periodic; | |
275 | } | |
276 | ||
277 | /** | |
278 | * s3c_hsotg_unmap_dma - unmap the DMA memory being used for the request | |
279 | * @hsotg: The device state. | |
280 | * @hs_ep: The endpoint for the request | |
281 | * @hs_req: The request being processed. | |
282 | * | |
283 | * This is the reverse of s3c_hsotg_map_dma(), called for the completion | |
284 | * of a request to ensure the buffer is ready for access by the caller. | |
8b9bc460 | 285 | */ |
941fcce4 | 286 | static void s3c_hsotg_unmap_dma(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
287 | struct s3c_hsotg_ep *hs_ep, |
288 | struct s3c_hsotg_req *hs_req) | |
289 | { | |
290 | struct usb_request *req = &hs_req->req; | |
5b7d70c6 BD |
291 | |
292 | /* ignore this if we're not moving any data */ | |
293 | if (hs_req->req.length == 0) | |
294 | return; | |
295 | ||
17d966a3 | 296 | usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in); |
5b7d70c6 BD |
297 | } |
298 | ||
299 | /** | |
300 | * s3c_hsotg_write_fifo - write packet Data to the TxFIFO | |
301 | * @hsotg: The controller state. | |
302 | * @hs_ep: The endpoint we're going to write for. | |
303 | * @hs_req: The request to write data for. | |
304 | * | |
305 | * This is called when the TxFIFO has some space in it to hold a new | |
306 | * transmission and we have something to give it. The actual setup of | |
307 | * the data size is done elsewhere, so all we have to do is to actually | |
308 | * write the data. | |
309 | * | |
310 | * The return value is zero if there is more space (or nothing was done) | |
311 | * otherwise -ENOSPC is returned if the FIFO space was used up. | |
312 | * | |
313 | * This routine is only needed for PIO | |
8b9bc460 | 314 | */ |
941fcce4 | 315 | static int s3c_hsotg_write_fifo(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
316 | struct s3c_hsotg_ep *hs_ep, |
317 | struct s3c_hsotg_req *hs_req) | |
318 | { | |
319 | bool periodic = is_ep_periodic(hs_ep); | |
94cb8fd6 | 320 | u32 gnptxsts = readl(hsotg->regs + GNPTXSTS); |
5b7d70c6 BD |
321 | int buf_pos = hs_req->req.actual; |
322 | int to_write = hs_ep->size_loaded; | |
323 | void *data; | |
324 | int can_write; | |
325 | int pkt_round; | |
4fca54aa | 326 | int max_transfer; |
5b7d70c6 BD |
327 | |
328 | to_write -= (buf_pos - hs_ep->last_load); | |
329 | ||
330 | /* if there's nothing to write, get out early */ | |
331 | if (to_write == 0) | |
332 | return 0; | |
333 | ||
10aebc77 | 334 | if (periodic && !hsotg->dedicated_fifos) { |
94cb8fd6 | 335 | u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index)); |
5b7d70c6 BD |
336 | int size_left; |
337 | int size_done; | |
338 | ||
8b9bc460 LM |
339 | /* |
340 | * work out how much data was loaded so we can calculate | |
341 | * how much data is left in the fifo. | |
342 | */ | |
5b7d70c6 | 343 | |
47a1685f | 344 | size_left = DXEPTSIZ_XFERSIZE_GET(epsize); |
5b7d70c6 | 345 | |
8b9bc460 LM |
346 | /* |
347 | * if shared fifo, we cannot write anything until the | |
e7a9ff54 BD |
348 | * previous data has been completely sent. |
349 | */ | |
350 | if (hs_ep->fifo_load != 0) { | |
47a1685f | 351 | s3c_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP); |
e7a9ff54 BD |
352 | return -ENOSPC; |
353 | } | |
354 | ||
5b7d70c6 BD |
355 | dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n", |
356 | __func__, size_left, | |
357 | hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size); | |
358 | ||
359 | /* how much of the data has moved */ | |
360 | size_done = hs_ep->size_loaded - size_left; | |
361 | ||
362 | /* how much data is left in the fifo */ | |
363 | can_write = hs_ep->fifo_load - size_done; | |
364 | dev_dbg(hsotg->dev, "%s: => can_write1=%d\n", | |
365 | __func__, can_write); | |
366 | ||
367 | can_write = hs_ep->fifo_size - can_write; | |
368 | dev_dbg(hsotg->dev, "%s: => can_write2=%d\n", | |
369 | __func__, can_write); | |
370 | ||
371 | if (can_write <= 0) { | |
47a1685f | 372 | s3c_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP); |
5b7d70c6 BD |
373 | return -ENOSPC; |
374 | } | |
10aebc77 | 375 | } else if (hsotg->dedicated_fifos && hs_ep->index != 0) { |
94cb8fd6 | 376 | can_write = readl(hsotg->regs + DTXFSTS(hs_ep->index)); |
10aebc77 BD |
377 | |
378 | can_write &= 0xffff; | |
379 | can_write *= 4; | |
5b7d70c6 | 380 | } else { |
47a1685f | 381 | if (GNPTXSTS_NP_TXQ_SPC_AVAIL_GET(gnptxsts) == 0) { |
5b7d70c6 BD |
382 | dev_dbg(hsotg->dev, |
383 | "%s: no queue slots available (0x%08x)\n", | |
384 | __func__, gnptxsts); | |
385 | ||
47a1685f | 386 | s3c_hsotg_en_gsint(hsotg, GINTSTS_NPTXFEMP); |
5b7d70c6 BD |
387 | return -ENOSPC; |
388 | } | |
389 | ||
47a1685f | 390 | can_write = GNPTXSTS_NP_TXF_SPC_AVAIL_GET(gnptxsts); |
679f9b7c | 391 | can_write *= 4; /* fifo size is in 32bit quantities. */ |
5b7d70c6 BD |
392 | } |
393 | ||
4fca54aa RB |
394 | max_transfer = hs_ep->ep.maxpacket * hs_ep->mc; |
395 | ||
396 | dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n", | |
397 | __func__, gnptxsts, can_write, to_write, max_transfer); | |
5b7d70c6 | 398 | |
8b9bc460 LM |
399 | /* |
400 | * limit to 512 bytes of data, it seems at least on the non-periodic | |
5b7d70c6 BD |
401 | * FIFO, requests of >512 cause the endpoint to get stuck with a |
402 | * fragment of the end of the transfer in it. | |
403 | */ | |
811f3303 | 404 | if (can_write > 512 && !periodic) |
5b7d70c6 BD |
405 | can_write = 512; |
406 | ||
8b9bc460 LM |
407 | /* |
408 | * limit the write to one max-packet size worth of data, but allow | |
03e10e5a | 409 | * the transfer to return that it did not run out of fifo space |
8b9bc460 LM |
410 | * doing it. |
411 | */ | |
4fca54aa RB |
412 | if (to_write > max_transfer) { |
413 | to_write = max_transfer; | |
03e10e5a | 414 | |
5cb2ff0c RB |
415 | /* it's needed only when we do not use dedicated fifos */ |
416 | if (!hsotg->dedicated_fifos) | |
417 | s3c_hsotg_en_gsint(hsotg, | |
47a1685f DN |
418 | periodic ? GINTSTS_PTXFEMP : |
419 | GINTSTS_NPTXFEMP); | |
03e10e5a BD |
420 | } |
421 | ||
5b7d70c6 BD |
422 | /* see if we can write data */ |
423 | ||
424 | if (to_write > can_write) { | |
425 | to_write = can_write; | |
4fca54aa | 426 | pkt_round = to_write % max_transfer; |
5b7d70c6 | 427 | |
8b9bc460 LM |
428 | /* |
429 | * Round the write down to an | |
5b7d70c6 BD |
430 | * exact number of packets. |
431 | * | |
432 | * Note, we do not currently check to see if we can ever | |
433 | * write a full packet or not to the FIFO. | |
434 | */ | |
435 | ||
436 | if (pkt_round) | |
437 | to_write -= pkt_round; | |
438 | ||
8b9bc460 LM |
439 | /* |
440 | * enable correct FIFO interrupt to alert us when there | |
441 | * is more room left. | |
442 | */ | |
5b7d70c6 | 443 | |
5cb2ff0c RB |
444 | /* it's needed only when we do not use dedicated fifos */ |
445 | if (!hsotg->dedicated_fifos) | |
446 | s3c_hsotg_en_gsint(hsotg, | |
47a1685f DN |
447 | periodic ? GINTSTS_PTXFEMP : |
448 | GINTSTS_NPTXFEMP); | |
5b7d70c6 BD |
449 | } |
450 | ||
451 | dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n", | |
452 | to_write, hs_req->req.length, can_write, buf_pos); | |
453 | ||
454 | if (to_write <= 0) | |
455 | return -ENOSPC; | |
456 | ||
457 | hs_req->req.actual = buf_pos + to_write; | |
458 | hs_ep->total_data += to_write; | |
459 | ||
460 | if (periodic) | |
461 | hs_ep->fifo_load += to_write; | |
462 | ||
463 | to_write = DIV_ROUND_UP(to_write, 4); | |
464 | data = hs_req->req.buf + buf_pos; | |
465 | ||
1a7ed5be | 466 | iowrite32_rep(hsotg->regs + EPFIFO(hs_ep->index), data, to_write); |
5b7d70c6 BD |
467 | |
468 | return (to_write >= can_write) ? -ENOSPC : 0; | |
469 | } | |
470 | ||
471 | /** | |
472 | * get_ep_limit - get the maximum data legnth for this endpoint | |
473 | * @hs_ep: The endpoint | |
474 | * | |
475 | * Return the maximum data that can be queued in one go on a given endpoint | |
476 | * so that transfers that are too long can be split. | |
477 | */ | |
478 | static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep) | |
479 | { | |
480 | int index = hs_ep->index; | |
481 | unsigned maxsize; | |
482 | unsigned maxpkt; | |
483 | ||
484 | if (index != 0) { | |
47a1685f DN |
485 | maxsize = DXEPTSIZ_XFERSIZE_LIMIT + 1; |
486 | maxpkt = DXEPTSIZ_PKTCNT_LIMIT + 1; | |
5b7d70c6 | 487 | } else { |
b05ca580 | 488 | maxsize = 64+64; |
66e5c643 | 489 | if (hs_ep->dir_in) |
47a1685f | 490 | maxpkt = DIEPTSIZ0_PKTCNT_LIMIT + 1; |
66e5c643 | 491 | else |
5b7d70c6 | 492 | maxpkt = 2; |
5b7d70c6 BD |
493 | } |
494 | ||
495 | /* we made the constant loading easier above by using +1 */ | |
496 | maxpkt--; | |
497 | maxsize--; | |
498 | ||
8b9bc460 LM |
499 | /* |
500 | * constrain by packet count if maxpkts*pktsize is greater | |
501 | * than the length register size. | |
502 | */ | |
5b7d70c6 BD |
503 | |
504 | if ((maxpkt * hs_ep->ep.maxpacket) < maxsize) | |
505 | maxsize = maxpkt * hs_ep->ep.maxpacket; | |
506 | ||
507 | return maxsize; | |
508 | } | |
509 | ||
510 | /** | |
511 | * s3c_hsotg_start_req - start a USB request from an endpoint's queue | |
512 | * @hsotg: The controller state. | |
513 | * @hs_ep: The endpoint to process a request for | |
514 | * @hs_req: The request to start. | |
515 | * @continuing: True if we are doing more for the current request. | |
516 | * | |
517 | * Start the given request running by setting the endpoint registers | |
518 | * appropriately, and writing any data to the FIFOs. | |
519 | */ | |
941fcce4 | 520 | static void s3c_hsotg_start_req(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
521 | struct s3c_hsotg_ep *hs_ep, |
522 | struct s3c_hsotg_req *hs_req, | |
523 | bool continuing) | |
524 | { | |
525 | struct usb_request *ureq = &hs_req->req; | |
526 | int index = hs_ep->index; | |
527 | int dir_in = hs_ep->dir_in; | |
528 | u32 epctrl_reg; | |
529 | u32 epsize_reg; | |
530 | u32 epsize; | |
531 | u32 ctrl; | |
532 | unsigned length; | |
533 | unsigned packets; | |
534 | unsigned maxreq; | |
535 | ||
536 | if (index != 0) { | |
537 | if (hs_ep->req && !continuing) { | |
538 | dev_err(hsotg->dev, "%s: active request\n", __func__); | |
539 | WARN_ON(1); | |
540 | return; | |
541 | } else if (hs_ep->req != hs_req && continuing) { | |
542 | dev_err(hsotg->dev, | |
543 | "%s: continue different req\n", __func__); | |
544 | WARN_ON(1); | |
545 | return; | |
546 | } | |
547 | } | |
548 | ||
94cb8fd6 LM |
549 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
550 | epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index); | |
5b7d70c6 BD |
551 | |
552 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n", | |
553 | __func__, readl(hsotg->regs + epctrl_reg), index, | |
554 | hs_ep->dir_in ? "in" : "out"); | |
555 | ||
9c39ddc6 AT |
556 | /* If endpoint is stalled, we will restart request later */ |
557 | ctrl = readl(hsotg->regs + epctrl_reg); | |
558 | ||
47a1685f | 559 | if (ctrl & DXEPCTL_STALL) { |
9c39ddc6 AT |
560 | dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index); |
561 | return; | |
562 | } | |
563 | ||
5b7d70c6 | 564 | length = ureq->length - ureq->actual; |
71225bee LM |
565 | dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n", |
566 | ureq->length, ureq->actual); | |
5b7d70c6 BD |
567 | |
568 | maxreq = get_ep_limit(hs_ep); | |
569 | if (length > maxreq) { | |
570 | int round = maxreq % hs_ep->ep.maxpacket; | |
571 | ||
572 | dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n", | |
573 | __func__, length, maxreq, round); | |
574 | ||
575 | /* round down to multiple of packets */ | |
576 | if (round) | |
577 | maxreq -= round; | |
578 | ||
579 | length = maxreq; | |
580 | } | |
581 | ||
582 | if (length) | |
583 | packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket); | |
584 | else | |
585 | packets = 1; /* send one packet if length is zero. */ | |
586 | ||
4fca54aa RB |
587 | if (hs_ep->isochronous && length > (hs_ep->mc * hs_ep->ep.maxpacket)) { |
588 | dev_err(hsotg->dev, "req length > maxpacket*mc\n"); | |
589 | return; | |
590 | } | |
591 | ||
5b7d70c6 | 592 | if (dir_in && index != 0) |
4fca54aa | 593 | if (hs_ep->isochronous) |
47a1685f | 594 | epsize = DXEPTSIZ_MC(packets); |
4fca54aa | 595 | else |
47a1685f | 596 | epsize = DXEPTSIZ_MC(1); |
5b7d70c6 BD |
597 | else |
598 | epsize = 0; | |
599 | ||
f71b5e25 MYK |
600 | /* |
601 | * zero length packet should be programmed on its own and should not | |
602 | * be counted in DIEPTSIZ.PktCnt with other packets. | |
603 | */ | |
604 | if (dir_in && ureq->zero && !continuing) { | |
605 | /* Test if zlp is actually required. */ | |
606 | if ((ureq->length >= hs_ep->ep.maxpacket) && | |
607 | !(ureq->length % hs_ep->ep.maxpacket)) | |
8a20fa45 | 608 | hs_ep->send_zlp = 1; |
5b7d70c6 BD |
609 | } |
610 | ||
47a1685f DN |
611 | epsize |= DXEPTSIZ_PKTCNT(packets); |
612 | epsize |= DXEPTSIZ_XFERSIZE(length); | |
5b7d70c6 BD |
613 | |
614 | dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n", | |
615 | __func__, packets, length, ureq->length, epsize, epsize_reg); | |
616 | ||
617 | /* store the request as the current one we're doing */ | |
618 | hs_ep->req = hs_req; | |
619 | ||
620 | /* write size / packets */ | |
621 | writel(epsize, hsotg->regs + epsize_reg); | |
622 | ||
db1d8ba3 | 623 | if (using_dma(hsotg) && !continuing) { |
5b7d70c6 BD |
624 | unsigned int dma_reg; |
625 | ||
8b9bc460 LM |
626 | /* |
627 | * write DMA address to control register, buffer already | |
628 | * synced by s3c_hsotg_ep_queue(). | |
629 | */ | |
5b7d70c6 | 630 | |
94cb8fd6 | 631 | dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index); |
5b7d70c6 BD |
632 | writel(ureq->dma, hsotg->regs + dma_reg); |
633 | ||
0cc4cf6f | 634 | dev_dbg(hsotg->dev, "%s: %pad => 0x%08x\n", |
8b3bc14f | 635 | __func__, &ureq->dma, dma_reg); |
5b7d70c6 BD |
636 | } |
637 | ||
47a1685f DN |
638 | ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */ |
639 | ctrl |= DXEPCTL_USBACTEP; | |
71225bee | 640 | |
fe0b94ab | 641 | dev_dbg(hsotg->dev, "ep0 state:%d\n", hsotg->ep0_state); |
71225bee LM |
642 | |
643 | /* For Setup request do not clear NAK */ | |
fe0b94ab | 644 | if (!(index == 0 && hsotg->ep0_state == DWC2_EP0_SETUP)) |
47a1685f | 645 | ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */ |
71225bee | 646 | |
5b7d70c6 BD |
647 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); |
648 | writel(ctrl, hsotg->regs + epctrl_reg); | |
649 | ||
8b9bc460 LM |
650 | /* |
651 | * set these, it seems that DMA support increments past the end | |
5b7d70c6 | 652 | * of the packet buffer so we need to calculate the length from |
8b9bc460 LM |
653 | * this information. |
654 | */ | |
5b7d70c6 BD |
655 | hs_ep->size_loaded = length; |
656 | hs_ep->last_load = ureq->actual; | |
657 | ||
658 | if (dir_in && !using_dma(hsotg)) { | |
659 | /* set these anyway, we may need them for non-periodic in */ | |
660 | hs_ep->fifo_load = 0; | |
661 | ||
662 | s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); | |
663 | } | |
664 | ||
8b9bc460 LM |
665 | /* |
666 | * clear the INTknTXFEmpMsk when we start request, more as a aide | |
667 | * to debugging to see what is going on. | |
668 | */ | |
5b7d70c6 | 669 | if (dir_in) |
47a1685f | 670 | writel(DIEPMSK_INTKNTXFEMPMSK, |
94cb8fd6 | 671 | hsotg->regs + DIEPINT(index)); |
5b7d70c6 | 672 | |
8b9bc460 LM |
673 | /* |
674 | * Note, trying to clear the NAK here causes problems with transmit | |
675 | * on the S3C6400 ending up with the TXFIFO becoming full. | |
676 | */ | |
5b7d70c6 BD |
677 | |
678 | /* check ep is enabled */ | |
47a1685f | 679 | if (!(readl(hsotg->regs + epctrl_reg) & DXEPCTL_EPENA)) |
1a0ed863 | 680 | dev_dbg(hsotg->dev, |
47a1685f | 681 | "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n", |
5b7d70c6 BD |
682 | index, readl(hsotg->regs + epctrl_reg)); |
683 | ||
47a1685f | 684 | dev_dbg(hsotg->dev, "%s: DXEPCTL=0x%08x\n", |
5b7d70c6 | 685 | __func__, readl(hsotg->regs + epctrl_reg)); |
afcf4169 RB |
686 | |
687 | /* enable ep interrupts */ | |
688 | s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1); | |
5b7d70c6 BD |
689 | } |
690 | ||
691 | /** | |
692 | * s3c_hsotg_map_dma - map the DMA memory being used for the request | |
693 | * @hsotg: The device state. | |
694 | * @hs_ep: The endpoint the request is on. | |
695 | * @req: The request being processed. | |
696 | * | |
697 | * We've been asked to queue a request, so ensure that the memory buffer | |
698 | * is correctly setup for DMA. If we've been passed an extant DMA address | |
699 | * then ensure the buffer has been synced to memory. If our buffer has no | |
700 | * DMA memory, then we map the memory and mark our request to allow us to | |
701 | * cleanup on completion. | |
8b9bc460 | 702 | */ |
941fcce4 | 703 | static int s3c_hsotg_map_dma(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
704 | struct s3c_hsotg_ep *hs_ep, |
705 | struct usb_request *req) | |
706 | { | |
5b7d70c6 | 707 | struct s3c_hsotg_req *hs_req = our_req(req); |
e58ebcd1 | 708 | int ret; |
5b7d70c6 BD |
709 | |
710 | /* if the length is zero, ignore the DMA data */ | |
711 | if (hs_req->req.length == 0) | |
712 | return 0; | |
713 | ||
e58ebcd1 FB |
714 | ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in); |
715 | if (ret) | |
716 | goto dma_error; | |
5b7d70c6 BD |
717 | |
718 | return 0; | |
719 | ||
720 | dma_error: | |
721 | dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n", | |
722 | __func__, req->buf, req->length); | |
723 | ||
724 | return -EIO; | |
725 | } | |
726 | ||
7d24c1b5 MYK |
727 | static int s3c_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg, |
728 | struct s3c_hsotg_ep *hs_ep, struct s3c_hsotg_req *hs_req) | |
729 | { | |
730 | void *req_buf = hs_req->req.buf; | |
731 | ||
732 | /* If dma is not being used or buffer is aligned */ | |
733 | if (!using_dma(hsotg) || !((long)req_buf & 3)) | |
734 | return 0; | |
735 | ||
736 | WARN_ON(hs_req->saved_req_buf); | |
737 | ||
738 | dev_dbg(hsotg->dev, "%s: %s: buf=%p length=%d\n", __func__, | |
739 | hs_ep->ep.name, req_buf, hs_req->req.length); | |
740 | ||
741 | hs_req->req.buf = kmalloc(hs_req->req.length, GFP_ATOMIC); | |
742 | if (!hs_req->req.buf) { | |
743 | hs_req->req.buf = req_buf; | |
744 | dev_err(hsotg->dev, | |
745 | "%s: unable to allocate memory for bounce buffer\n", | |
746 | __func__); | |
747 | return -ENOMEM; | |
748 | } | |
749 | ||
750 | /* Save actual buffer */ | |
751 | hs_req->saved_req_buf = req_buf; | |
752 | ||
753 | if (hs_ep->dir_in) | |
754 | memcpy(hs_req->req.buf, req_buf, hs_req->req.length); | |
755 | return 0; | |
756 | } | |
757 | ||
758 | static void s3c_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg, | |
759 | struct s3c_hsotg_ep *hs_ep, struct s3c_hsotg_req *hs_req) | |
760 | { | |
761 | /* If dma is not being used or buffer was aligned */ | |
762 | if (!using_dma(hsotg) || !hs_req->saved_req_buf) | |
763 | return; | |
764 | ||
765 | dev_dbg(hsotg->dev, "%s: %s: status=%d actual-length=%d\n", __func__, | |
766 | hs_ep->ep.name, hs_req->req.status, hs_req->req.actual); | |
767 | ||
768 | /* Copy data from bounce buffer on successful out transfer */ | |
769 | if (!hs_ep->dir_in && !hs_req->req.status) | |
770 | memcpy(hs_req->saved_req_buf, hs_req->req.buf, | |
771 | hs_req->req.actual); | |
772 | ||
773 | /* Free bounce buffer */ | |
774 | kfree(hs_req->req.buf); | |
775 | ||
776 | hs_req->req.buf = hs_req->saved_req_buf; | |
777 | hs_req->saved_req_buf = NULL; | |
778 | } | |
779 | ||
5b7d70c6 BD |
780 | static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, |
781 | gfp_t gfp_flags) | |
782 | { | |
783 | struct s3c_hsotg_req *hs_req = our_req(req); | |
784 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 785 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 | 786 | bool first; |
7d24c1b5 | 787 | int ret; |
5b7d70c6 BD |
788 | |
789 | dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n", | |
790 | ep->name, req, req->length, req->buf, req->no_interrupt, | |
791 | req->zero, req->short_not_ok); | |
792 | ||
7ababa92 GH |
793 | /* Prevent new request submission when controller is suspended */ |
794 | if (hs->lx_state == DWC2_L2) { | |
795 | dev_dbg(hs->dev, "%s: don't submit request while suspended\n", | |
796 | __func__); | |
797 | return -EAGAIN; | |
798 | } | |
799 | ||
5b7d70c6 BD |
800 | /* initialise status of the request */ |
801 | INIT_LIST_HEAD(&hs_req->queue); | |
802 | req->actual = 0; | |
803 | req->status = -EINPROGRESS; | |
804 | ||
7d24c1b5 MYK |
805 | ret = s3c_hsotg_handle_unaligned_buf_start(hs, hs_ep, hs_req); |
806 | if (ret) | |
807 | return ret; | |
808 | ||
5b7d70c6 BD |
809 | /* if we're using DMA, sync the buffers as necessary */ |
810 | if (using_dma(hs)) { | |
7d24c1b5 | 811 | ret = s3c_hsotg_map_dma(hs, hs_ep, req); |
5b7d70c6 BD |
812 | if (ret) |
813 | return ret; | |
814 | } | |
815 | ||
5b7d70c6 BD |
816 | first = list_empty(&hs_ep->queue); |
817 | list_add_tail(&hs_req->queue, &hs_ep->queue); | |
818 | ||
819 | if (first) | |
820 | s3c_hsotg_start_req(hs, hs_ep, hs_req, false); | |
821 | ||
5b7d70c6 BD |
822 | return 0; |
823 | } | |
824 | ||
5ad1d316 LM |
825 | static int s3c_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req, |
826 | gfp_t gfp_flags) | |
827 | { | |
828 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 829 | struct dwc2_hsotg *hs = hs_ep->parent; |
5ad1d316 LM |
830 | unsigned long flags = 0; |
831 | int ret = 0; | |
832 | ||
833 | spin_lock_irqsave(&hs->lock, flags); | |
834 | ret = s3c_hsotg_ep_queue(ep, req, gfp_flags); | |
835 | spin_unlock_irqrestore(&hs->lock, flags); | |
836 | ||
837 | return ret; | |
838 | } | |
839 | ||
5b7d70c6 BD |
840 | static void s3c_hsotg_ep_free_request(struct usb_ep *ep, |
841 | struct usb_request *req) | |
842 | { | |
843 | struct s3c_hsotg_req *hs_req = our_req(req); | |
844 | ||
845 | kfree(hs_req); | |
846 | } | |
847 | ||
848 | /** | |
849 | * s3c_hsotg_complete_oursetup - setup completion callback | |
850 | * @ep: The endpoint the request was on. | |
851 | * @req: The request completed. | |
852 | * | |
853 | * Called on completion of any requests the driver itself | |
854 | * submitted that need cleaning up. | |
855 | */ | |
856 | static void s3c_hsotg_complete_oursetup(struct usb_ep *ep, | |
857 | struct usb_request *req) | |
858 | { | |
859 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 860 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
861 | |
862 | dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req); | |
863 | ||
864 | s3c_hsotg_ep_free_request(ep, req); | |
865 | } | |
866 | ||
867 | /** | |
868 | * ep_from_windex - convert control wIndex value to endpoint | |
869 | * @hsotg: The driver state. | |
870 | * @windex: The control request wIndex field (in host order). | |
871 | * | |
872 | * Convert the given wIndex into a pointer to an driver endpoint | |
873 | * structure, or return NULL if it is not a valid endpoint. | |
8b9bc460 | 874 | */ |
941fcce4 | 875 | static struct s3c_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
876 | u32 windex) |
877 | { | |
c6f5c050 | 878 | struct s3c_hsotg_ep *ep; |
5b7d70c6 BD |
879 | int dir = (windex & USB_DIR_IN) ? 1 : 0; |
880 | int idx = windex & 0x7F; | |
881 | ||
882 | if (windex >= 0x100) | |
883 | return NULL; | |
884 | ||
b3f489b2 | 885 | if (idx > hsotg->num_of_eps) |
5b7d70c6 BD |
886 | return NULL; |
887 | ||
c6f5c050 MYK |
888 | ep = index_to_ep(hsotg, idx, dir); |
889 | ||
5b7d70c6 BD |
890 | if (idx && ep->dir_in != dir) |
891 | return NULL; | |
892 | ||
893 | return ep; | |
894 | } | |
895 | ||
9e14d0a5 GH |
896 | /** |
897 | * s3c_hsotg_set_test_mode - Enable usb Test Modes | |
898 | * @hsotg: The driver state. | |
899 | * @testmode: requested usb test mode | |
900 | * Enable usb Test Mode requested by the Host. | |
901 | */ | |
f91eea44 | 902 | int s3c_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode) |
9e14d0a5 GH |
903 | { |
904 | int dctl = readl(hsotg->regs + DCTL); | |
905 | ||
906 | dctl &= ~DCTL_TSTCTL_MASK; | |
907 | switch (testmode) { | |
908 | case TEST_J: | |
909 | case TEST_K: | |
910 | case TEST_SE0_NAK: | |
911 | case TEST_PACKET: | |
912 | case TEST_FORCE_EN: | |
913 | dctl |= testmode << DCTL_TSTCTL_SHIFT; | |
914 | break; | |
915 | default: | |
916 | return -EINVAL; | |
917 | } | |
918 | writel(dctl, hsotg->regs + DCTL); | |
919 | return 0; | |
920 | } | |
921 | ||
5b7d70c6 BD |
922 | /** |
923 | * s3c_hsotg_send_reply - send reply to control request | |
924 | * @hsotg: The device state | |
925 | * @ep: Endpoint 0 | |
926 | * @buff: Buffer for request | |
927 | * @length: Length of reply. | |
928 | * | |
929 | * Create a request and queue it on the given endpoint. This is useful as | |
930 | * an internal method of sending replies to certain control requests, etc. | |
931 | */ | |
941fcce4 | 932 | static int s3c_hsotg_send_reply(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
933 | struct s3c_hsotg_ep *ep, |
934 | void *buff, | |
935 | int length) | |
936 | { | |
937 | struct usb_request *req; | |
938 | int ret; | |
939 | ||
940 | dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length); | |
941 | ||
942 | req = s3c_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC); | |
943 | hsotg->ep0_reply = req; | |
944 | if (!req) { | |
945 | dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__); | |
946 | return -ENOMEM; | |
947 | } | |
948 | ||
949 | req->buf = hsotg->ep0_buff; | |
950 | req->length = length; | |
f71b5e25 MYK |
951 | /* |
952 | * zero flag is for sending zlp in DATA IN stage. It has no impact on | |
953 | * STATUS stage. | |
954 | */ | |
955 | req->zero = 0; | |
5b7d70c6 BD |
956 | req->complete = s3c_hsotg_complete_oursetup; |
957 | ||
958 | if (length) | |
959 | memcpy(req->buf, buff, length); | |
5b7d70c6 BD |
960 | |
961 | ret = s3c_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC); | |
962 | if (ret) { | |
963 | dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__); | |
964 | return ret; | |
965 | } | |
966 | ||
967 | return 0; | |
968 | } | |
969 | ||
970 | /** | |
971 | * s3c_hsotg_process_req_status - process request GET_STATUS | |
972 | * @hsotg: The device state | |
973 | * @ctrl: USB control request | |
974 | */ | |
941fcce4 | 975 | static int s3c_hsotg_process_req_status(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
976 | struct usb_ctrlrequest *ctrl) |
977 | { | |
c6f5c050 | 978 | struct s3c_hsotg_ep *ep0 = hsotg->eps_out[0]; |
5b7d70c6 BD |
979 | struct s3c_hsotg_ep *ep; |
980 | __le16 reply; | |
981 | int ret; | |
982 | ||
983 | dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__); | |
984 | ||
985 | if (!ep0->dir_in) { | |
986 | dev_warn(hsotg->dev, "%s: direction out?\n", __func__); | |
987 | return -EINVAL; | |
988 | } | |
989 | ||
990 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
991 | case USB_RECIP_DEVICE: | |
992 | reply = cpu_to_le16(0); /* bit 0 => self powered, | |
993 | * bit 1 => remote wakeup */ | |
994 | break; | |
995 | ||
996 | case USB_RECIP_INTERFACE: | |
997 | /* currently, the data result should be zero */ | |
998 | reply = cpu_to_le16(0); | |
999 | break; | |
1000 | ||
1001 | case USB_RECIP_ENDPOINT: | |
1002 | ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); | |
1003 | if (!ep) | |
1004 | return -ENOENT; | |
1005 | ||
1006 | reply = cpu_to_le16(ep->halted ? 1 : 0); | |
1007 | break; | |
1008 | ||
1009 | default: | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | if (le16_to_cpu(ctrl->wLength) != 2) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | ret = s3c_hsotg_send_reply(hsotg, ep0, &reply, 2); | |
1017 | if (ret) { | |
1018 | dev_err(hsotg->dev, "%s: failed to send reply\n", __func__); | |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | return 1; | |
1023 | } | |
1024 | ||
1025 | static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value); | |
1026 | ||
9c39ddc6 AT |
1027 | /** |
1028 | * get_ep_head - return the first request on the endpoint | |
1029 | * @hs_ep: The controller endpoint to get | |
1030 | * | |
1031 | * Get the first request on the endpoint. | |
1032 | */ | |
1033 | static struct s3c_hsotg_req *get_ep_head(struct s3c_hsotg_ep *hs_ep) | |
1034 | { | |
1035 | if (list_empty(&hs_ep->queue)) | |
1036 | return NULL; | |
1037 | ||
1038 | return list_first_entry(&hs_ep->queue, struct s3c_hsotg_req, queue); | |
1039 | } | |
1040 | ||
5b7d70c6 | 1041 | /** |
58f7c43e | 1042 | * s3c_hsotg_process_req_feature - process request {SET,CLEAR}_FEATURE |
5b7d70c6 BD |
1043 | * @hsotg: The device state |
1044 | * @ctrl: USB control request | |
1045 | */ | |
941fcce4 | 1046 | static int s3c_hsotg_process_req_feature(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
1047 | struct usb_ctrlrequest *ctrl) |
1048 | { | |
c6f5c050 | 1049 | struct s3c_hsotg_ep *ep0 = hsotg->eps_out[0]; |
9c39ddc6 AT |
1050 | struct s3c_hsotg_req *hs_req; |
1051 | bool restart; | |
5b7d70c6 BD |
1052 | bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE); |
1053 | struct s3c_hsotg_ep *ep; | |
26ab3d0c | 1054 | int ret; |
bd9ef7bf | 1055 | bool halted; |
9e14d0a5 GH |
1056 | u32 recip; |
1057 | u32 wValue; | |
1058 | u32 wIndex; | |
5b7d70c6 BD |
1059 | |
1060 | dev_dbg(hsotg->dev, "%s: %s_FEATURE\n", | |
1061 | __func__, set ? "SET" : "CLEAR"); | |
1062 | ||
9e14d0a5 GH |
1063 | wValue = le16_to_cpu(ctrl->wValue); |
1064 | wIndex = le16_to_cpu(ctrl->wIndex); | |
1065 | recip = ctrl->bRequestType & USB_RECIP_MASK; | |
1066 | ||
1067 | switch (recip) { | |
1068 | case USB_RECIP_DEVICE: | |
1069 | switch (wValue) { | |
1070 | case USB_DEVICE_TEST_MODE: | |
1071 | if ((wIndex & 0xff) != 0) | |
1072 | return -EINVAL; | |
1073 | if (!set) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | hsotg->test_mode = wIndex >> 8; | |
1077 | ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); | |
1078 | if (ret) { | |
1079 | dev_err(hsotg->dev, | |
1080 | "%s: failed to send reply\n", __func__); | |
1081 | return ret; | |
1082 | } | |
1083 | break; | |
1084 | default: | |
1085 | return -ENOENT; | |
1086 | } | |
1087 | break; | |
1088 | ||
1089 | case USB_RECIP_ENDPOINT: | |
1090 | ep = ep_from_windex(hsotg, wIndex); | |
5b7d70c6 BD |
1091 | if (!ep) { |
1092 | dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n", | |
9e14d0a5 | 1093 | __func__, wIndex); |
5b7d70c6 BD |
1094 | return -ENOENT; |
1095 | } | |
1096 | ||
9e14d0a5 | 1097 | switch (wValue) { |
5b7d70c6 | 1098 | case USB_ENDPOINT_HALT: |
bd9ef7bf RB |
1099 | halted = ep->halted; |
1100 | ||
5b7d70c6 | 1101 | s3c_hsotg_ep_sethalt(&ep->ep, set); |
26ab3d0c AT |
1102 | |
1103 | ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); | |
1104 | if (ret) { | |
1105 | dev_err(hsotg->dev, | |
1106 | "%s: failed to send reply\n", __func__); | |
1107 | return ret; | |
1108 | } | |
9c39ddc6 | 1109 | |
bd9ef7bf RB |
1110 | /* |
1111 | * we have to complete all requests for ep if it was | |
1112 | * halted, and the halt was cleared by CLEAR_FEATURE | |
1113 | */ | |
1114 | ||
1115 | if (!set && halted) { | |
9c39ddc6 AT |
1116 | /* |
1117 | * If we have request in progress, | |
1118 | * then complete it | |
1119 | */ | |
1120 | if (ep->req) { | |
1121 | hs_req = ep->req; | |
1122 | ep->req = NULL; | |
1123 | list_del_init(&hs_req->queue); | |
c00dd4a6 GH |
1124 | if (hs_req->req.complete) { |
1125 | spin_unlock(&hsotg->lock); | |
1126 | usb_gadget_giveback_request( | |
1127 | &ep->ep, &hs_req->req); | |
1128 | spin_lock(&hsotg->lock); | |
1129 | } | |
9c39ddc6 AT |
1130 | } |
1131 | ||
1132 | /* If we have pending request, then start it */ | |
c00dd4a6 GH |
1133 | if (!ep->req) { |
1134 | restart = !list_empty(&ep->queue); | |
1135 | if (restart) { | |
1136 | hs_req = get_ep_head(ep); | |
1137 | s3c_hsotg_start_req(hsotg, ep, | |
1138 | hs_req, false); | |
1139 | } | |
9c39ddc6 AT |
1140 | } |
1141 | } | |
1142 | ||
5b7d70c6 BD |
1143 | break; |
1144 | ||
1145 | default: | |
1146 | return -ENOENT; | |
1147 | } | |
9e14d0a5 GH |
1148 | break; |
1149 | default: | |
1150 | return -ENOENT; | |
1151 | } | |
5b7d70c6 BD |
1152 | return 1; |
1153 | } | |
1154 | ||
941fcce4 | 1155 | static void s3c_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg); |
ab93e014 | 1156 | |
c9f721b2 RB |
1157 | /** |
1158 | * s3c_hsotg_stall_ep0 - stall ep0 | |
1159 | * @hsotg: The device state | |
1160 | * | |
1161 | * Set stall for ep0 as response for setup request. | |
1162 | */ | |
941fcce4 | 1163 | static void s3c_hsotg_stall_ep0(struct dwc2_hsotg *hsotg) |
e9ebe7c3 | 1164 | { |
c6f5c050 | 1165 | struct s3c_hsotg_ep *ep0 = hsotg->eps_out[0]; |
c9f721b2 RB |
1166 | u32 reg; |
1167 | u32 ctrl; | |
1168 | ||
1169 | dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in); | |
1170 | reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0; | |
1171 | ||
1172 | /* | |
1173 | * DxEPCTL_Stall will be cleared by EP once it has | |
1174 | * taken effect, so no need to clear later. | |
1175 | */ | |
1176 | ||
1177 | ctrl = readl(hsotg->regs + reg); | |
47a1685f DN |
1178 | ctrl |= DXEPCTL_STALL; |
1179 | ctrl |= DXEPCTL_CNAK; | |
c9f721b2 RB |
1180 | writel(ctrl, hsotg->regs + reg); |
1181 | ||
1182 | dev_dbg(hsotg->dev, | |
47a1685f | 1183 | "written DXEPCTL=0x%08x to %08x (DXEPCTL=0x%08x)\n", |
c9f721b2 RB |
1184 | ctrl, reg, readl(hsotg->regs + reg)); |
1185 | ||
1186 | /* | |
1187 | * complete won't be called, so we enqueue | |
1188 | * setup request here | |
1189 | */ | |
1190 | s3c_hsotg_enqueue_setup(hsotg); | |
1191 | } | |
1192 | ||
5b7d70c6 BD |
1193 | /** |
1194 | * s3c_hsotg_process_control - process a control request | |
1195 | * @hsotg: The device state | |
1196 | * @ctrl: The control request received | |
1197 | * | |
1198 | * The controller has received the SETUP phase of a control request, and | |
1199 | * needs to work out what to do next (and whether to pass it on to the | |
1200 | * gadget driver). | |
1201 | */ | |
941fcce4 | 1202 | static void s3c_hsotg_process_control(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
1203 | struct usb_ctrlrequest *ctrl) |
1204 | { | |
c6f5c050 | 1205 | struct s3c_hsotg_ep *ep0 = hsotg->eps_out[0]; |
5b7d70c6 BD |
1206 | int ret = 0; |
1207 | u32 dcfg; | |
1208 | ||
5b7d70c6 BD |
1209 | dev_dbg(hsotg->dev, "ctrl Req=%02x, Type=%02x, V=%04x, L=%04x\n", |
1210 | ctrl->bRequest, ctrl->bRequestType, | |
1211 | ctrl->wValue, ctrl->wLength); | |
1212 | ||
fe0b94ab MYK |
1213 | if (ctrl->wLength == 0) { |
1214 | ep0->dir_in = 1; | |
1215 | hsotg->ep0_state = DWC2_EP0_STATUS_IN; | |
1216 | } else if (ctrl->bRequestType & USB_DIR_IN) { | |
5b7d70c6 | 1217 | ep0->dir_in = 1; |
fe0b94ab MYK |
1218 | hsotg->ep0_state = DWC2_EP0_DATA_IN; |
1219 | } else { | |
1220 | ep0->dir_in = 0; | |
1221 | hsotg->ep0_state = DWC2_EP0_DATA_OUT; | |
1222 | } | |
5b7d70c6 BD |
1223 | |
1224 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1225 | switch (ctrl->bRequest) { | |
1226 | case USB_REQ_SET_ADDRESS: | |
6d713c15 | 1227 | hsotg->connected = 1; |
94cb8fd6 | 1228 | dcfg = readl(hsotg->regs + DCFG); |
47a1685f | 1229 | dcfg &= ~DCFG_DEVADDR_MASK; |
d5dbd3f7 PZ |
1230 | dcfg |= (le16_to_cpu(ctrl->wValue) << |
1231 | DCFG_DEVADDR_SHIFT) & DCFG_DEVADDR_MASK; | |
94cb8fd6 | 1232 | writel(dcfg, hsotg->regs + DCFG); |
5b7d70c6 BD |
1233 | |
1234 | dev_info(hsotg->dev, "new address %d\n", ctrl->wValue); | |
1235 | ||
1236 | ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); | |
1237 | return; | |
1238 | ||
1239 | case USB_REQ_GET_STATUS: | |
1240 | ret = s3c_hsotg_process_req_status(hsotg, ctrl); | |
1241 | break; | |
1242 | ||
1243 | case USB_REQ_CLEAR_FEATURE: | |
1244 | case USB_REQ_SET_FEATURE: | |
1245 | ret = s3c_hsotg_process_req_feature(hsotg, ctrl); | |
1246 | break; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | /* as a fallback, try delivering it to the driver to deal with */ | |
1251 | ||
1252 | if (ret == 0 && hsotg->driver) { | |
93f599f2 | 1253 | spin_unlock(&hsotg->lock); |
5b7d70c6 | 1254 | ret = hsotg->driver->setup(&hsotg->gadget, ctrl); |
93f599f2 | 1255 | spin_lock(&hsotg->lock); |
5b7d70c6 BD |
1256 | if (ret < 0) |
1257 | dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret); | |
1258 | } | |
1259 | ||
8b9bc460 LM |
1260 | /* |
1261 | * the request is either unhandlable, or is not formatted correctly | |
5b7d70c6 BD |
1262 | * so respond with a STALL for the status stage to indicate failure. |
1263 | */ | |
1264 | ||
c9f721b2 RB |
1265 | if (ret < 0) |
1266 | s3c_hsotg_stall_ep0(hsotg); | |
5b7d70c6 BD |
1267 | } |
1268 | ||
5b7d70c6 BD |
1269 | /** |
1270 | * s3c_hsotg_complete_setup - completion of a setup transfer | |
1271 | * @ep: The endpoint the request was on. | |
1272 | * @req: The request completed. | |
1273 | * | |
1274 | * Called on completion of any requests the driver itself submitted for | |
1275 | * EP0 setup packets | |
1276 | */ | |
1277 | static void s3c_hsotg_complete_setup(struct usb_ep *ep, | |
1278 | struct usb_request *req) | |
1279 | { | |
1280 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 1281 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
1282 | |
1283 | if (req->status < 0) { | |
1284 | dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status); | |
1285 | return; | |
1286 | } | |
1287 | ||
93f599f2 | 1288 | spin_lock(&hsotg->lock); |
5b7d70c6 BD |
1289 | if (req->actual == 0) |
1290 | s3c_hsotg_enqueue_setup(hsotg); | |
1291 | else | |
1292 | s3c_hsotg_process_control(hsotg, req->buf); | |
93f599f2 | 1293 | spin_unlock(&hsotg->lock); |
5b7d70c6 BD |
1294 | } |
1295 | ||
1296 | /** | |
1297 | * s3c_hsotg_enqueue_setup - start a request for EP0 packets | |
1298 | * @hsotg: The device state. | |
1299 | * | |
1300 | * Enqueue a request on EP0 if necessary to received any SETUP packets | |
1301 | * received from the host. | |
1302 | */ | |
941fcce4 | 1303 | static void s3c_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg) |
5b7d70c6 BD |
1304 | { |
1305 | struct usb_request *req = hsotg->ctrl_req; | |
1306 | struct s3c_hsotg_req *hs_req = our_req(req); | |
1307 | int ret; | |
1308 | ||
1309 | dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__); | |
1310 | ||
1311 | req->zero = 0; | |
1312 | req->length = 8; | |
1313 | req->buf = hsotg->ctrl_buff; | |
1314 | req->complete = s3c_hsotg_complete_setup; | |
1315 | ||
1316 | if (!list_empty(&hs_req->queue)) { | |
1317 | dev_dbg(hsotg->dev, "%s already queued???\n", __func__); | |
1318 | return; | |
1319 | } | |
1320 | ||
c6f5c050 | 1321 | hsotg->eps_out[0]->dir_in = 0; |
8a20fa45 | 1322 | hsotg->eps_out[0]->send_zlp = 0; |
fe0b94ab | 1323 | hsotg->ep0_state = DWC2_EP0_SETUP; |
5b7d70c6 | 1324 | |
c6f5c050 | 1325 | ret = s3c_hsotg_ep_queue(&hsotg->eps_out[0]->ep, req, GFP_ATOMIC); |
5b7d70c6 BD |
1326 | if (ret < 0) { |
1327 | dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret); | |
8b9bc460 LM |
1328 | /* |
1329 | * Don't think there's much we can do other than watch the | |
1330 | * driver fail. | |
1331 | */ | |
5b7d70c6 BD |
1332 | } |
1333 | } | |
1334 | ||
fe0b94ab MYK |
1335 | static void s3c_hsotg_program_zlp(struct dwc2_hsotg *hsotg, |
1336 | struct s3c_hsotg_ep *hs_ep) | |
1337 | { | |
1338 | u32 ctrl; | |
1339 | u8 index = hs_ep->index; | |
1340 | u32 epctl_reg = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index); | |
1341 | u32 epsiz_reg = hs_ep->dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index); | |
1342 | ||
ccb34a91 MYK |
1343 | if (hs_ep->dir_in) |
1344 | dev_dbg(hsotg->dev, "Sending zero-length packet on ep%d\n", | |
1345 | index); | |
1346 | else | |
1347 | dev_dbg(hsotg->dev, "Receiving zero-length packet on ep%d\n", | |
1348 | index); | |
fe0b94ab MYK |
1349 | |
1350 | writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) | | |
1351 | DXEPTSIZ_XFERSIZE(0), hsotg->regs + | |
1352 | epsiz_reg); | |
1353 | ||
1354 | ctrl = readl(hsotg->regs + epctl_reg); | |
1355 | ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */ | |
1356 | ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */ | |
1357 | ctrl |= DXEPCTL_USBACTEP; | |
1358 | writel(ctrl, hsotg->regs + epctl_reg); | |
1359 | } | |
1360 | ||
5b7d70c6 BD |
1361 | /** |
1362 | * s3c_hsotg_complete_request - complete a request given to us | |
1363 | * @hsotg: The device state. | |
1364 | * @hs_ep: The endpoint the request was on. | |
1365 | * @hs_req: The request to complete. | |
1366 | * @result: The result code (0 => Ok, otherwise errno) | |
1367 | * | |
1368 | * The given request has finished, so call the necessary completion | |
1369 | * if it has one and then look to see if we can start a new request | |
1370 | * on the endpoint. | |
1371 | * | |
1372 | * Note, expects the ep to already be locked as appropriate. | |
8b9bc460 | 1373 | */ |
941fcce4 | 1374 | static void s3c_hsotg_complete_request(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
1375 | struct s3c_hsotg_ep *hs_ep, |
1376 | struct s3c_hsotg_req *hs_req, | |
1377 | int result) | |
1378 | { | |
1379 | bool restart; | |
1380 | ||
1381 | if (!hs_req) { | |
1382 | dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__); | |
1383 | return; | |
1384 | } | |
1385 | ||
1386 | dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n", | |
1387 | hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete); | |
1388 | ||
8b9bc460 LM |
1389 | /* |
1390 | * only replace the status if we've not already set an error | |
1391 | * from a previous transaction | |
1392 | */ | |
5b7d70c6 BD |
1393 | |
1394 | if (hs_req->req.status == -EINPROGRESS) | |
1395 | hs_req->req.status = result; | |
1396 | ||
7d24c1b5 MYK |
1397 | s3c_hsotg_handle_unaligned_buf_complete(hsotg, hs_ep, hs_req); |
1398 | ||
5b7d70c6 BD |
1399 | hs_ep->req = NULL; |
1400 | list_del_init(&hs_req->queue); | |
1401 | ||
1402 | if (using_dma(hsotg)) | |
1403 | s3c_hsotg_unmap_dma(hsotg, hs_ep, hs_req); | |
1404 | ||
8b9bc460 LM |
1405 | /* |
1406 | * call the complete request with the locks off, just in case the | |
1407 | * request tries to queue more work for this endpoint. | |
1408 | */ | |
5b7d70c6 BD |
1409 | |
1410 | if (hs_req->req.complete) { | |
22258f49 | 1411 | spin_unlock(&hsotg->lock); |
304f7e5e | 1412 | usb_gadget_giveback_request(&hs_ep->ep, &hs_req->req); |
22258f49 | 1413 | spin_lock(&hsotg->lock); |
5b7d70c6 BD |
1414 | } |
1415 | ||
8b9bc460 LM |
1416 | /* |
1417 | * Look to see if there is anything else to do. Note, the completion | |
5b7d70c6 | 1418 | * of the previous request may have caused a new request to be started |
8b9bc460 LM |
1419 | * so be careful when doing this. |
1420 | */ | |
5b7d70c6 BD |
1421 | |
1422 | if (!hs_ep->req && result >= 0) { | |
1423 | restart = !list_empty(&hs_ep->queue); | |
1424 | if (restart) { | |
1425 | hs_req = get_ep_head(hs_ep); | |
1426 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, false); | |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | ||
5b7d70c6 BD |
1431 | /** |
1432 | * s3c_hsotg_rx_data - receive data from the FIFO for an endpoint | |
1433 | * @hsotg: The device state. | |
1434 | * @ep_idx: The endpoint index for the data | |
1435 | * @size: The size of data in the fifo, in bytes | |
1436 | * | |
1437 | * The FIFO status shows there is data to read from the FIFO for a given | |
1438 | * endpoint, so sort out whether we need to read the data into a request | |
1439 | * that has been made for that endpoint. | |
1440 | */ | |
941fcce4 | 1441 | static void s3c_hsotg_rx_data(struct dwc2_hsotg *hsotg, int ep_idx, int size) |
5b7d70c6 | 1442 | { |
c6f5c050 | 1443 | struct s3c_hsotg_ep *hs_ep = hsotg->eps_out[ep_idx]; |
5b7d70c6 | 1444 | struct s3c_hsotg_req *hs_req = hs_ep->req; |
94cb8fd6 | 1445 | void __iomem *fifo = hsotg->regs + EPFIFO(ep_idx); |
5b7d70c6 BD |
1446 | int to_read; |
1447 | int max_req; | |
1448 | int read_ptr; | |
1449 | ||
22258f49 | 1450 | |
5b7d70c6 | 1451 | if (!hs_req) { |
94cb8fd6 | 1452 | u32 epctl = readl(hsotg->regs + DOEPCTL(ep_idx)); |
5b7d70c6 BD |
1453 | int ptr; |
1454 | ||
6b448af4 | 1455 | dev_dbg(hsotg->dev, |
47a1685f | 1456 | "%s: FIFO %d bytes on ep%d but no req (DXEPCTl=0x%08x)\n", |
5b7d70c6 BD |
1457 | __func__, size, ep_idx, epctl); |
1458 | ||
1459 | /* dump the data from the FIFO, we've nothing we can do */ | |
1460 | for (ptr = 0; ptr < size; ptr += 4) | |
1461 | (void)readl(fifo); | |
1462 | ||
1463 | return; | |
1464 | } | |
1465 | ||
5b7d70c6 BD |
1466 | to_read = size; |
1467 | read_ptr = hs_req->req.actual; | |
1468 | max_req = hs_req->req.length - read_ptr; | |
1469 | ||
a33e7136 BD |
1470 | dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n", |
1471 | __func__, to_read, max_req, read_ptr, hs_req->req.length); | |
1472 | ||
5b7d70c6 | 1473 | if (to_read > max_req) { |
8b9bc460 LM |
1474 | /* |
1475 | * more data appeared than we where willing | |
5b7d70c6 BD |
1476 | * to deal with in this request. |
1477 | */ | |
1478 | ||
1479 | /* currently we don't deal this */ | |
1480 | WARN_ON_ONCE(1); | |
1481 | } | |
1482 | ||
5b7d70c6 BD |
1483 | hs_ep->total_data += to_read; |
1484 | hs_req->req.actual += to_read; | |
1485 | to_read = DIV_ROUND_UP(to_read, 4); | |
1486 | ||
8b9bc460 LM |
1487 | /* |
1488 | * note, we might over-write the buffer end by 3 bytes depending on | |
1489 | * alignment of the data. | |
1490 | */ | |
1a7ed5be | 1491 | ioread32_rep(fifo, hs_req->req.buf + read_ptr, to_read); |
5b7d70c6 BD |
1492 | } |
1493 | ||
1494 | /** | |
fe0b94ab | 1495 | * s3c_hsotg_ep0_zlp - send/receive zero-length packet on control endpoint |
5b7d70c6 | 1496 | * @hsotg: The device instance |
fe0b94ab | 1497 | * @dir_in: If IN zlp |
5b7d70c6 BD |
1498 | * |
1499 | * Generate a zero-length IN packet request for terminating a SETUP | |
1500 | * transaction. | |
1501 | * | |
1502 | * Note, since we don't write any data to the TxFIFO, then it is | |
25985edc | 1503 | * currently believed that we do not need to wait for any space in |
5b7d70c6 BD |
1504 | * the TxFIFO. |
1505 | */ | |
fe0b94ab | 1506 | static void s3c_hsotg_ep0_zlp(struct dwc2_hsotg *hsotg, bool dir_in) |
5b7d70c6 | 1507 | { |
c6f5c050 | 1508 | /* eps_out[0] is used in both directions */ |
fe0b94ab MYK |
1509 | hsotg->eps_out[0]->dir_in = dir_in; |
1510 | hsotg->ep0_state = dir_in ? DWC2_EP0_STATUS_IN : DWC2_EP0_STATUS_OUT; | |
5b7d70c6 | 1511 | |
fe0b94ab | 1512 | s3c_hsotg_program_zlp(hsotg, hsotg->eps_out[0]); |
5b7d70c6 BD |
1513 | } |
1514 | ||
1515 | /** | |
1516 | * s3c_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO | |
1517 | * @hsotg: The device instance | |
1518 | * @epnum: The endpoint received from | |
5b7d70c6 BD |
1519 | * |
1520 | * The RXFIFO has delivered an OutDone event, which means that the data | |
1521 | * transfer for an OUT endpoint has been completed, either by a short | |
1522 | * packet or by the finish of a transfer. | |
8b9bc460 | 1523 | */ |
fe0b94ab | 1524 | static void s3c_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum) |
5b7d70c6 | 1525 | { |
94cb8fd6 | 1526 | u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum)); |
c6f5c050 | 1527 | struct s3c_hsotg_ep *hs_ep = hsotg->eps_out[epnum]; |
5b7d70c6 BD |
1528 | struct s3c_hsotg_req *hs_req = hs_ep->req; |
1529 | struct usb_request *req = &hs_req->req; | |
47a1685f | 1530 | unsigned size_left = DXEPTSIZ_XFERSIZE_GET(epsize); |
5b7d70c6 BD |
1531 | int result = 0; |
1532 | ||
1533 | if (!hs_req) { | |
1534 | dev_dbg(hsotg->dev, "%s: no request active\n", __func__); | |
1535 | return; | |
1536 | } | |
1537 | ||
fe0b94ab MYK |
1538 | if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_OUT) { |
1539 | dev_dbg(hsotg->dev, "zlp packet received\n"); | |
1540 | s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); | |
1541 | s3c_hsotg_enqueue_setup(hsotg); | |
1542 | return; | |
1543 | } | |
1544 | ||
5b7d70c6 | 1545 | if (using_dma(hsotg)) { |
5b7d70c6 | 1546 | unsigned size_done; |
5b7d70c6 | 1547 | |
8b9bc460 LM |
1548 | /* |
1549 | * Calculate the size of the transfer by checking how much | |
5b7d70c6 BD |
1550 | * is left in the endpoint size register and then working it |
1551 | * out from the amount we loaded for the transfer. | |
1552 | * | |
1553 | * We need to do this as DMA pointers are always 32bit aligned | |
1554 | * so may overshoot/undershoot the transfer. | |
1555 | */ | |
1556 | ||
5b7d70c6 BD |
1557 | size_done = hs_ep->size_loaded - size_left; |
1558 | size_done += hs_ep->last_load; | |
1559 | ||
1560 | req->actual = size_done; | |
1561 | } | |
1562 | ||
a33e7136 BD |
1563 | /* if there is more request to do, schedule new transfer */ |
1564 | if (req->actual < req->length && size_left == 0) { | |
1565 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); | |
1566 | return; | |
1567 | } | |
1568 | ||
5b7d70c6 BD |
1569 | if (req->actual < req->length && req->short_not_ok) { |
1570 | dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n", | |
1571 | __func__, req->actual, req->length); | |
1572 | ||
8b9bc460 LM |
1573 | /* |
1574 | * todo - what should we return here? there's no one else | |
1575 | * even bothering to check the status. | |
1576 | */ | |
5b7d70c6 BD |
1577 | } |
1578 | ||
fe0b94ab MYK |
1579 | if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_DATA_OUT) { |
1580 | /* Move to STATUS IN */ | |
1581 | s3c_hsotg_ep0_zlp(hsotg, true); | |
1582 | return; | |
5b7d70c6 BD |
1583 | } |
1584 | ||
5ad1d316 | 1585 | s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, result); |
5b7d70c6 BD |
1586 | } |
1587 | ||
1588 | /** | |
1589 | * s3c_hsotg_read_frameno - read current frame number | |
1590 | * @hsotg: The device instance | |
1591 | * | |
1592 | * Return the current frame number | |
8b9bc460 | 1593 | */ |
941fcce4 | 1594 | static u32 s3c_hsotg_read_frameno(struct dwc2_hsotg *hsotg) |
5b7d70c6 BD |
1595 | { |
1596 | u32 dsts; | |
1597 | ||
94cb8fd6 LM |
1598 | dsts = readl(hsotg->regs + DSTS); |
1599 | dsts &= DSTS_SOFFN_MASK; | |
1600 | dsts >>= DSTS_SOFFN_SHIFT; | |
5b7d70c6 BD |
1601 | |
1602 | return dsts; | |
1603 | } | |
1604 | ||
1605 | /** | |
1606 | * s3c_hsotg_handle_rx - RX FIFO has data | |
1607 | * @hsotg: The device instance | |
1608 | * | |
1609 | * The IRQ handler has detected that the RX FIFO has some data in it | |
1610 | * that requires processing, so find out what is in there and do the | |
1611 | * appropriate read. | |
1612 | * | |
25985edc | 1613 | * The RXFIFO is a true FIFO, the packets coming out are still in packet |
5b7d70c6 BD |
1614 | * chunks, so if you have x packets received on an endpoint you'll get x |
1615 | * FIFO events delivered, each with a packet's worth of data in it. | |
1616 | * | |
1617 | * When using DMA, we should not be processing events from the RXFIFO | |
1618 | * as the actual data should be sent to the memory directly and we turn | |
1619 | * on the completion interrupts to get notifications of transfer completion. | |
1620 | */ | |
941fcce4 | 1621 | static void s3c_hsotg_handle_rx(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 1622 | { |
94cb8fd6 | 1623 | u32 grxstsr = readl(hsotg->regs + GRXSTSP); |
5b7d70c6 BD |
1624 | u32 epnum, status, size; |
1625 | ||
1626 | WARN_ON(using_dma(hsotg)); | |
1627 | ||
47a1685f DN |
1628 | epnum = grxstsr & GRXSTS_EPNUM_MASK; |
1629 | status = grxstsr & GRXSTS_PKTSTS_MASK; | |
5b7d70c6 | 1630 | |
47a1685f DN |
1631 | size = grxstsr & GRXSTS_BYTECNT_MASK; |
1632 | size >>= GRXSTS_BYTECNT_SHIFT; | |
5b7d70c6 | 1633 | |
d7c747c5 | 1634 | dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n", |
5b7d70c6 BD |
1635 | __func__, grxstsr, size, epnum); |
1636 | ||
47a1685f DN |
1637 | switch ((status & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT) { |
1638 | case GRXSTS_PKTSTS_GLOBALOUTNAK: | |
1639 | dev_dbg(hsotg->dev, "GLOBALOUTNAK\n"); | |
5b7d70c6 BD |
1640 | break; |
1641 | ||
47a1685f | 1642 | case GRXSTS_PKTSTS_OUTDONE: |
5b7d70c6 BD |
1643 | dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n", |
1644 | s3c_hsotg_read_frameno(hsotg)); | |
1645 | ||
1646 | if (!using_dma(hsotg)) | |
fe0b94ab | 1647 | s3c_hsotg_handle_outdone(hsotg, epnum); |
5b7d70c6 BD |
1648 | break; |
1649 | ||
47a1685f | 1650 | case GRXSTS_PKTSTS_SETUPDONE: |
5b7d70c6 BD |
1651 | dev_dbg(hsotg->dev, |
1652 | "SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1653 | s3c_hsotg_read_frameno(hsotg), | |
94cb8fd6 | 1654 | readl(hsotg->regs + DOEPCTL(0))); |
fe0b94ab MYK |
1655 | /* |
1656 | * Call s3c_hsotg_handle_outdone here if it was not called from | |
1657 | * GRXSTS_PKTSTS_OUTDONE. That is, if the core didn't | |
1658 | * generate GRXSTS_PKTSTS_OUTDONE for setup packet. | |
1659 | */ | |
1660 | if (hsotg->ep0_state == DWC2_EP0_SETUP) | |
1661 | s3c_hsotg_handle_outdone(hsotg, epnum); | |
5b7d70c6 BD |
1662 | break; |
1663 | ||
47a1685f | 1664 | case GRXSTS_PKTSTS_OUTRX: |
5b7d70c6 BD |
1665 | s3c_hsotg_rx_data(hsotg, epnum, size); |
1666 | break; | |
1667 | ||
47a1685f | 1668 | case GRXSTS_PKTSTS_SETUPRX: |
5b7d70c6 BD |
1669 | dev_dbg(hsotg->dev, |
1670 | "SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1671 | s3c_hsotg_read_frameno(hsotg), | |
94cb8fd6 | 1672 | readl(hsotg->regs + DOEPCTL(0))); |
5b7d70c6 | 1673 | |
fe0b94ab MYK |
1674 | WARN_ON(hsotg->ep0_state != DWC2_EP0_SETUP); |
1675 | ||
5b7d70c6 BD |
1676 | s3c_hsotg_rx_data(hsotg, epnum, size); |
1677 | break; | |
1678 | ||
1679 | default: | |
1680 | dev_warn(hsotg->dev, "%s: unknown status %08x\n", | |
1681 | __func__, grxstsr); | |
1682 | ||
1683 | s3c_hsotg_dump(hsotg); | |
1684 | break; | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | /** | |
1689 | * s3c_hsotg_ep0_mps - turn max packet size into register setting | |
1690 | * @mps: The maximum packet size in bytes. | |
8b9bc460 | 1691 | */ |
5b7d70c6 BD |
1692 | static u32 s3c_hsotg_ep0_mps(unsigned int mps) |
1693 | { | |
1694 | switch (mps) { | |
1695 | case 64: | |
94cb8fd6 | 1696 | return D0EPCTL_MPS_64; |
5b7d70c6 | 1697 | case 32: |
94cb8fd6 | 1698 | return D0EPCTL_MPS_32; |
5b7d70c6 | 1699 | case 16: |
94cb8fd6 | 1700 | return D0EPCTL_MPS_16; |
5b7d70c6 | 1701 | case 8: |
94cb8fd6 | 1702 | return D0EPCTL_MPS_8; |
5b7d70c6 BD |
1703 | } |
1704 | ||
1705 | /* bad max packet size, warn and return invalid result */ | |
1706 | WARN_ON(1); | |
1707 | return (u32)-1; | |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * s3c_hsotg_set_ep_maxpacket - set endpoint's max-packet field | |
1712 | * @hsotg: The driver state. | |
1713 | * @ep: The index number of the endpoint | |
1714 | * @mps: The maximum packet size in bytes | |
1715 | * | |
1716 | * Configure the maximum packet size for the given endpoint, updating | |
1717 | * the hardware control registers to reflect this. | |
1718 | */ | |
941fcce4 | 1719 | static void s3c_hsotg_set_ep_maxpacket(struct dwc2_hsotg *hsotg, |
c6f5c050 | 1720 | unsigned int ep, unsigned int mps, unsigned int dir_in) |
5b7d70c6 | 1721 | { |
c6f5c050 | 1722 | struct s3c_hsotg_ep *hs_ep; |
5b7d70c6 BD |
1723 | void __iomem *regs = hsotg->regs; |
1724 | u32 mpsval; | |
4fca54aa | 1725 | u32 mcval; |
5b7d70c6 BD |
1726 | u32 reg; |
1727 | ||
c6f5c050 MYK |
1728 | hs_ep = index_to_ep(hsotg, ep, dir_in); |
1729 | if (!hs_ep) | |
1730 | return; | |
1731 | ||
5b7d70c6 BD |
1732 | if (ep == 0) { |
1733 | /* EP0 is a special case */ | |
1734 | mpsval = s3c_hsotg_ep0_mps(mps); | |
1735 | if (mpsval > 3) | |
1736 | goto bad_mps; | |
e9edd199 | 1737 | hs_ep->ep.maxpacket = mps; |
4fca54aa | 1738 | hs_ep->mc = 1; |
5b7d70c6 | 1739 | } else { |
47a1685f | 1740 | mpsval = mps & DXEPCTL_MPS_MASK; |
e9edd199 | 1741 | if (mpsval > 1024) |
5b7d70c6 | 1742 | goto bad_mps; |
4fca54aa RB |
1743 | mcval = ((mps >> 11) & 0x3) + 1; |
1744 | hs_ep->mc = mcval; | |
1745 | if (mcval > 3) | |
1746 | goto bad_mps; | |
e9edd199 | 1747 | hs_ep->ep.maxpacket = mpsval; |
5b7d70c6 BD |
1748 | } |
1749 | ||
c6f5c050 MYK |
1750 | if (dir_in) { |
1751 | reg = readl(regs + DIEPCTL(ep)); | |
1752 | reg &= ~DXEPCTL_MPS_MASK; | |
1753 | reg |= mpsval; | |
1754 | writel(reg, regs + DIEPCTL(ep)); | |
1755 | } else { | |
94cb8fd6 | 1756 | reg = readl(regs + DOEPCTL(ep)); |
47a1685f | 1757 | reg &= ~DXEPCTL_MPS_MASK; |
659ad60c | 1758 | reg |= mpsval; |
94cb8fd6 | 1759 | writel(reg, regs + DOEPCTL(ep)); |
659ad60c | 1760 | } |
5b7d70c6 BD |
1761 | |
1762 | return; | |
1763 | ||
1764 | bad_mps: | |
1765 | dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps); | |
1766 | } | |
1767 | ||
9c39ddc6 AT |
1768 | /** |
1769 | * s3c_hsotg_txfifo_flush - flush Tx FIFO | |
1770 | * @hsotg: The driver state | |
1771 | * @idx: The index for the endpoint (0..15) | |
1772 | */ | |
941fcce4 | 1773 | static void s3c_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx) |
9c39ddc6 AT |
1774 | { |
1775 | int timeout; | |
1776 | int val; | |
1777 | ||
47a1685f | 1778 | writel(GRSTCTL_TXFNUM(idx) | GRSTCTL_TXFFLSH, |
94cb8fd6 | 1779 | hsotg->regs + GRSTCTL); |
9c39ddc6 AT |
1780 | |
1781 | /* wait until the fifo is flushed */ | |
1782 | timeout = 100; | |
1783 | ||
1784 | while (1) { | |
94cb8fd6 | 1785 | val = readl(hsotg->regs + GRSTCTL); |
9c39ddc6 | 1786 | |
47a1685f | 1787 | if ((val & (GRSTCTL_TXFFLSH)) == 0) |
9c39ddc6 AT |
1788 | break; |
1789 | ||
1790 | if (--timeout == 0) { | |
1791 | dev_err(hsotg->dev, | |
1792 | "%s: timeout flushing fifo (GRSTCTL=%08x)\n", | |
1793 | __func__, val); | |
e0cbe595 | 1794 | break; |
9c39ddc6 AT |
1795 | } |
1796 | ||
1797 | udelay(1); | |
1798 | } | |
1799 | } | |
5b7d70c6 BD |
1800 | |
1801 | /** | |
1802 | * s3c_hsotg_trytx - check to see if anything needs transmitting | |
1803 | * @hsotg: The driver state | |
1804 | * @hs_ep: The driver endpoint to check. | |
1805 | * | |
1806 | * Check to see if there is a request that has data to send, and if so | |
1807 | * make an attempt to write data into the FIFO. | |
1808 | */ | |
941fcce4 | 1809 | static int s3c_hsotg_trytx(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
1810 | struct s3c_hsotg_ep *hs_ep) |
1811 | { | |
1812 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
1813 | ||
afcf4169 RB |
1814 | if (!hs_ep->dir_in || !hs_req) { |
1815 | /** | |
1816 | * if request is not enqueued, we disable interrupts | |
1817 | * for endpoints, excepting ep0 | |
1818 | */ | |
1819 | if (hs_ep->index != 0) | |
1820 | s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, | |
1821 | hs_ep->dir_in, 0); | |
5b7d70c6 | 1822 | return 0; |
afcf4169 | 1823 | } |
5b7d70c6 BD |
1824 | |
1825 | if (hs_req->req.actual < hs_req->req.length) { | |
1826 | dev_dbg(hsotg->dev, "trying to write more for ep%d\n", | |
1827 | hs_ep->index); | |
1828 | return s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); | |
1829 | } | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | /** | |
1835 | * s3c_hsotg_complete_in - complete IN transfer | |
1836 | * @hsotg: The device state. | |
1837 | * @hs_ep: The endpoint that has just completed. | |
1838 | * | |
1839 | * An IN transfer has been completed, update the transfer's state and then | |
1840 | * call the relevant completion routines. | |
1841 | */ | |
941fcce4 | 1842 | static void s3c_hsotg_complete_in(struct dwc2_hsotg *hsotg, |
5b7d70c6 BD |
1843 | struct s3c_hsotg_ep *hs_ep) |
1844 | { | |
1845 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
94cb8fd6 | 1846 | u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index)); |
5b7d70c6 BD |
1847 | int size_left, size_done; |
1848 | ||
1849 | if (!hs_req) { | |
1850 | dev_dbg(hsotg->dev, "XferCompl but no req\n"); | |
1851 | return; | |
1852 | } | |
1853 | ||
d3ca0259 | 1854 | /* Finish ZLP handling for IN EP0 transactions */ |
fe0b94ab MYK |
1855 | if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_IN) { |
1856 | dev_dbg(hsotg->dev, "zlp packet sent\n"); | |
5ad1d316 | 1857 | s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); |
9e14d0a5 GH |
1858 | if (hsotg->test_mode) { |
1859 | int ret; | |
1860 | ||
1861 | ret = s3c_hsotg_set_test_mode(hsotg, hsotg->test_mode); | |
1862 | if (ret < 0) { | |
1863 | dev_dbg(hsotg->dev, "Invalid Test #%d\n", | |
1864 | hsotg->test_mode); | |
1865 | s3c_hsotg_stall_ep0(hsotg); | |
1866 | return; | |
1867 | } | |
1868 | } | |
fe0b94ab | 1869 | s3c_hsotg_enqueue_setup(hsotg); |
d3ca0259 LM |
1870 | return; |
1871 | } | |
1872 | ||
8b9bc460 LM |
1873 | /* |
1874 | * Calculate the size of the transfer by checking how much is left | |
5b7d70c6 BD |
1875 | * in the endpoint size register and then working it out from |
1876 | * the amount we loaded for the transfer. | |
1877 | * | |
1878 | * We do this even for DMA, as the transfer may have incremented | |
1879 | * past the end of the buffer (DMA transfers are always 32bit | |
1880 | * aligned). | |
1881 | */ | |
1882 | ||
47a1685f | 1883 | size_left = DXEPTSIZ_XFERSIZE_GET(epsize); |
5b7d70c6 BD |
1884 | |
1885 | size_done = hs_ep->size_loaded - size_left; | |
1886 | size_done += hs_ep->last_load; | |
1887 | ||
1888 | if (hs_req->req.actual != size_done) | |
1889 | dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n", | |
1890 | __func__, hs_req->req.actual, size_done); | |
1891 | ||
1892 | hs_req->req.actual = size_done; | |
d3ca0259 LM |
1893 | dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n", |
1894 | hs_req->req.length, hs_req->req.actual, hs_req->req.zero); | |
1895 | ||
5b7d70c6 BD |
1896 | if (!size_left && hs_req->req.actual < hs_req->req.length) { |
1897 | dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__); | |
1898 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); | |
fe0b94ab MYK |
1899 | return; |
1900 | } | |
1901 | ||
f71b5e25 | 1902 | /* Zlp for all endpoints, for ep0 only in DATA IN stage */ |
8a20fa45 | 1903 | if (hs_ep->send_zlp) { |
f71b5e25 | 1904 | s3c_hsotg_program_zlp(hsotg, hs_ep); |
8a20fa45 | 1905 | hs_ep->send_zlp = 0; |
f71b5e25 MYK |
1906 | /* transfer will be completed on next complete interrupt */ |
1907 | return; | |
1908 | } | |
1909 | ||
fe0b94ab MYK |
1910 | if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_DATA_IN) { |
1911 | /* Move to STATUS OUT */ | |
1912 | s3c_hsotg_ep0_zlp(hsotg, false); | |
1913 | return; | |
1914 | } | |
1915 | ||
1916 | s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); | |
5b7d70c6 BD |
1917 | } |
1918 | ||
1919 | /** | |
1920 | * s3c_hsotg_epint - handle an in/out endpoint interrupt | |
1921 | * @hsotg: The driver state | |
1922 | * @idx: The index for the endpoint (0..15) | |
1923 | * @dir_in: Set if this is an IN endpoint | |
1924 | * | |
1925 | * Process and clear any interrupt pending for an individual endpoint | |
8b9bc460 | 1926 | */ |
941fcce4 | 1927 | static void s3c_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, |
5b7d70c6 BD |
1928 | int dir_in) |
1929 | { | |
c6f5c050 | 1930 | struct s3c_hsotg_ep *hs_ep = index_to_ep(hsotg, idx, dir_in); |
94cb8fd6 LM |
1931 | u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx); |
1932 | u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx); | |
1933 | u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx); | |
5b7d70c6 | 1934 | u32 ints; |
1479e841 | 1935 | u32 ctrl; |
5b7d70c6 BD |
1936 | |
1937 | ints = readl(hsotg->regs + epint_reg); | |
1479e841 | 1938 | ctrl = readl(hsotg->regs + epctl_reg); |
5b7d70c6 | 1939 | |
a3395f0d AT |
1940 | /* Clear endpoint interrupts */ |
1941 | writel(ints, hsotg->regs + epint_reg); | |
1942 | ||
c6f5c050 MYK |
1943 | if (!hs_ep) { |
1944 | dev_err(hsotg->dev, "%s:Interrupt for unconfigured ep%d(%s)\n", | |
1945 | __func__, idx, dir_in ? "in" : "out"); | |
1946 | return; | |
1947 | } | |
1948 | ||
5b7d70c6 BD |
1949 | dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n", |
1950 | __func__, idx, dir_in ? "in" : "out", ints); | |
1951 | ||
b787d755 MYK |
1952 | /* Don't process XferCompl interrupt if it is a setup packet */ |
1953 | if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD))) | |
1954 | ints &= ~DXEPINT_XFERCOMPL; | |
1955 | ||
47a1685f | 1956 | if (ints & DXEPINT_XFERCOMPL) { |
1479e841 | 1957 | if (hs_ep->isochronous && hs_ep->interval == 1) { |
47a1685f DN |
1958 | if (ctrl & DXEPCTL_EOFRNUM) |
1959 | ctrl |= DXEPCTL_SETEVENFR; | |
1479e841 | 1960 | else |
47a1685f | 1961 | ctrl |= DXEPCTL_SETODDFR; |
1479e841 RB |
1962 | writel(ctrl, hsotg->regs + epctl_reg); |
1963 | } | |
1964 | ||
5b7d70c6 | 1965 | dev_dbg(hsotg->dev, |
47a1685f | 1966 | "%s: XferCompl: DxEPCTL=0x%08x, DXEPTSIZ=%08x\n", |
5b7d70c6 BD |
1967 | __func__, readl(hsotg->regs + epctl_reg), |
1968 | readl(hsotg->regs + epsiz_reg)); | |
1969 | ||
8b9bc460 LM |
1970 | /* |
1971 | * we get OutDone from the FIFO, so we only need to look | |
1972 | * at completing IN requests here | |
1973 | */ | |
5b7d70c6 BD |
1974 | if (dir_in) { |
1975 | s3c_hsotg_complete_in(hsotg, hs_ep); | |
1976 | ||
c9a64ea8 | 1977 | if (idx == 0 && !hs_ep->req) |
5b7d70c6 BD |
1978 | s3c_hsotg_enqueue_setup(hsotg); |
1979 | } else if (using_dma(hsotg)) { | |
8b9bc460 LM |
1980 | /* |
1981 | * We're using DMA, we need to fire an OutDone here | |
1982 | * as we ignore the RXFIFO. | |
1983 | */ | |
5b7d70c6 | 1984 | |
fe0b94ab | 1985 | s3c_hsotg_handle_outdone(hsotg, idx); |
5b7d70c6 | 1986 | } |
5b7d70c6 BD |
1987 | } |
1988 | ||
47a1685f | 1989 | if (ints & DXEPINT_EPDISBLD) { |
5b7d70c6 | 1990 | dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__); |
5b7d70c6 | 1991 | |
9c39ddc6 AT |
1992 | if (dir_in) { |
1993 | int epctl = readl(hsotg->regs + epctl_reg); | |
1994 | ||
b203d0a2 | 1995 | s3c_hsotg_txfifo_flush(hsotg, hs_ep->fifo_index); |
9c39ddc6 | 1996 | |
47a1685f DN |
1997 | if ((epctl & DXEPCTL_STALL) && |
1998 | (epctl & DXEPCTL_EPTYPE_BULK)) { | |
94cb8fd6 | 1999 | int dctl = readl(hsotg->regs + DCTL); |
9c39ddc6 | 2000 | |
47a1685f | 2001 | dctl |= DCTL_CGNPINNAK; |
94cb8fd6 | 2002 | writel(dctl, hsotg->regs + DCTL); |
9c39ddc6 AT |
2003 | } |
2004 | } | |
2005 | } | |
2006 | ||
47a1685f | 2007 | if (ints & DXEPINT_AHBERR) |
5b7d70c6 | 2008 | dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__); |
5b7d70c6 | 2009 | |
47a1685f | 2010 | if (ints & DXEPINT_SETUP) { /* Setup or Timeout */ |
5b7d70c6 BD |
2011 | dev_dbg(hsotg->dev, "%s: Setup/Timeout\n", __func__); |
2012 | ||
2013 | if (using_dma(hsotg) && idx == 0) { | |
8b9bc460 LM |
2014 | /* |
2015 | * this is the notification we've received a | |
5b7d70c6 BD |
2016 | * setup packet. In non-DMA mode we'd get this |
2017 | * from the RXFIFO, instead we need to process | |
8b9bc460 LM |
2018 | * the setup here. |
2019 | */ | |
5b7d70c6 BD |
2020 | |
2021 | if (dir_in) | |
2022 | WARN_ON_ONCE(1); | |
2023 | else | |
fe0b94ab | 2024 | s3c_hsotg_handle_outdone(hsotg, 0); |
5b7d70c6 | 2025 | } |
5b7d70c6 BD |
2026 | } |
2027 | ||
47a1685f | 2028 | if (ints & DXEPINT_BACK2BACKSETUP) |
5b7d70c6 | 2029 | dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__); |
5b7d70c6 | 2030 | |
1479e841 | 2031 | if (dir_in && !hs_ep->isochronous) { |
8b9bc460 | 2032 | /* not sure if this is important, but we'll clear it anyway */ |
47a1685f | 2033 | if (ints & DIEPMSK_INTKNTXFEMPMSK) { |
5b7d70c6 BD |
2034 | dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n", |
2035 | __func__, idx); | |
5b7d70c6 BD |
2036 | } |
2037 | ||
2038 | /* this probably means something bad is happening */ | |
47a1685f | 2039 | if (ints & DIEPMSK_INTKNEPMISMSK) { |
5b7d70c6 BD |
2040 | dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n", |
2041 | __func__, idx); | |
5b7d70c6 | 2042 | } |
10aebc77 BD |
2043 | |
2044 | /* FIFO has space or is empty (see GAHBCFG) */ | |
2045 | if (hsotg->dedicated_fifos && | |
47a1685f | 2046 | ints & DIEPMSK_TXFIFOEMPTY) { |
10aebc77 BD |
2047 | dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n", |
2048 | __func__, idx); | |
70fa030f AT |
2049 | if (!using_dma(hsotg)) |
2050 | s3c_hsotg_trytx(hsotg, hs_ep); | |
10aebc77 | 2051 | } |
5b7d70c6 | 2052 | } |
5b7d70c6 BD |
2053 | } |
2054 | ||
2055 | /** | |
2056 | * s3c_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done) | |
2057 | * @hsotg: The device state. | |
2058 | * | |
2059 | * Handle updating the device settings after the enumeration phase has | |
2060 | * been completed. | |
8b9bc460 | 2061 | */ |
941fcce4 | 2062 | static void s3c_hsotg_irq_enumdone(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 2063 | { |
94cb8fd6 | 2064 | u32 dsts = readl(hsotg->regs + DSTS); |
9b2667f1 | 2065 | int ep0_mps = 0, ep_mps = 8; |
5b7d70c6 | 2066 | |
8b9bc460 LM |
2067 | /* |
2068 | * This should signal the finish of the enumeration phase | |
5b7d70c6 | 2069 | * of the USB handshaking, so we should now know what rate |
8b9bc460 LM |
2070 | * we connected at. |
2071 | */ | |
5b7d70c6 BD |
2072 | |
2073 | dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts); | |
2074 | ||
8b9bc460 LM |
2075 | /* |
2076 | * note, since we're limited by the size of transfer on EP0, and | |
5b7d70c6 | 2077 | * it seems IN transfers must be a even number of packets we do |
8b9bc460 LM |
2078 | * not advertise a 64byte MPS on EP0. |
2079 | */ | |
5b7d70c6 BD |
2080 | |
2081 | /* catch both EnumSpd_FS and EnumSpd_FS48 */ | |
47a1685f DN |
2082 | switch (dsts & DSTS_ENUMSPD_MASK) { |
2083 | case DSTS_ENUMSPD_FS: | |
2084 | case DSTS_ENUMSPD_FS48: | |
5b7d70c6 | 2085 | hsotg->gadget.speed = USB_SPEED_FULL; |
5b7d70c6 | 2086 | ep0_mps = EP0_MPS_LIMIT; |
295538ff | 2087 | ep_mps = 1023; |
5b7d70c6 BD |
2088 | break; |
2089 | ||
47a1685f | 2090 | case DSTS_ENUMSPD_HS: |
5b7d70c6 | 2091 | hsotg->gadget.speed = USB_SPEED_HIGH; |
5b7d70c6 | 2092 | ep0_mps = EP0_MPS_LIMIT; |
295538ff | 2093 | ep_mps = 1024; |
5b7d70c6 BD |
2094 | break; |
2095 | ||
47a1685f | 2096 | case DSTS_ENUMSPD_LS: |
5b7d70c6 | 2097 | hsotg->gadget.speed = USB_SPEED_LOW; |
8b9bc460 LM |
2098 | /* |
2099 | * note, we don't actually support LS in this driver at the | |
5b7d70c6 BD |
2100 | * moment, and the documentation seems to imply that it isn't |
2101 | * supported by the PHYs on some of the devices. | |
2102 | */ | |
2103 | break; | |
2104 | } | |
e538dfda MN |
2105 | dev_info(hsotg->dev, "new device is %s\n", |
2106 | usb_speed_string(hsotg->gadget.speed)); | |
5b7d70c6 | 2107 | |
8b9bc460 LM |
2108 | /* |
2109 | * we should now know the maximum packet size for an | |
2110 | * endpoint, so set the endpoints to a default value. | |
2111 | */ | |
5b7d70c6 BD |
2112 | |
2113 | if (ep0_mps) { | |
2114 | int i; | |
c6f5c050 MYK |
2115 | /* Initialize ep0 for both in and out directions */ |
2116 | s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 1); | |
2117 | s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 0); | |
2118 | for (i = 1; i < hsotg->num_of_eps; i++) { | |
2119 | if (hsotg->eps_in[i]) | |
2120 | s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, 1); | |
2121 | if (hsotg->eps_out[i]) | |
2122 | s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, 0); | |
2123 | } | |
5b7d70c6 BD |
2124 | } |
2125 | ||
2126 | /* ensure after enumeration our EP0 is active */ | |
2127 | ||
2128 | s3c_hsotg_enqueue_setup(hsotg); | |
2129 | ||
2130 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
94cb8fd6 LM |
2131 | readl(hsotg->regs + DIEPCTL0), |
2132 | readl(hsotg->regs + DOEPCTL0)); | |
5b7d70c6 BD |
2133 | } |
2134 | ||
2135 | /** | |
2136 | * kill_all_requests - remove all requests from the endpoint's queue | |
2137 | * @hsotg: The device state. | |
2138 | * @ep: The endpoint the requests may be on. | |
2139 | * @result: The result code to use. | |
5b7d70c6 BD |
2140 | * |
2141 | * Go through the requests on the given endpoint and mark them | |
2142 | * completed with the given result code. | |
2143 | */ | |
941fcce4 | 2144 | static void kill_all_requests(struct dwc2_hsotg *hsotg, |
5b7d70c6 | 2145 | struct s3c_hsotg_ep *ep, |
6b448af4 | 2146 | int result) |
5b7d70c6 BD |
2147 | { |
2148 | struct s3c_hsotg_req *req, *treq; | |
b203d0a2 | 2149 | unsigned size; |
5b7d70c6 | 2150 | |
6b448af4 | 2151 | ep->req = NULL; |
5b7d70c6 | 2152 | |
6b448af4 | 2153 | list_for_each_entry_safe(req, treq, &ep->queue, queue) |
5b7d70c6 BD |
2154 | s3c_hsotg_complete_request(hsotg, ep, req, |
2155 | result); | |
6b448af4 | 2156 | |
b203d0a2 RB |
2157 | if (!hsotg->dedicated_fifos) |
2158 | return; | |
2159 | size = (readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4; | |
2160 | if (size < ep->fifo_size) | |
2161 | s3c_hsotg_txfifo_flush(hsotg, ep->fifo_index); | |
5b7d70c6 BD |
2162 | } |
2163 | ||
5b7d70c6 | 2164 | /** |
5e891342 | 2165 | * s3c_hsotg_disconnect - disconnect service |
5b7d70c6 BD |
2166 | * @hsotg: The device state. |
2167 | * | |
5e891342 LM |
2168 | * The device has been disconnected. Remove all current |
2169 | * transactions and signal the gadget driver that this | |
2170 | * has happened. | |
8b9bc460 | 2171 | */ |
4ace06e8 | 2172 | void s3c_hsotg_disconnect(struct dwc2_hsotg *hsotg) |
5b7d70c6 BD |
2173 | { |
2174 | unsigned ep; | |
2175 | ||
4ace06e8 MS |
2176 | if (!hsotg->connected) |
2177 | return; | |
2178 | ||
2179 | hsotg->connected = 0; | |
9e14d0a5 | 2180 | hsotg->test_mode = 0; |
c6f5c050 MYK |
2181 | |
2182 | for (ep = 0; ep < hsotg->num_of_eps; ep++) { | |
2183 | if (hsotg->eps_in[ep]) | |
2184 | kill_all_requests(hsotg, hsotg->eps_in[ep], | |
2185 | -ESHUTDOWN); | |
2186 | if (hsotg->eps_out[ep]) | |
2187 | kill_all_requests(hsotg, hsotg->eps_out[ep], | |
2188 | -ESHUTDOWN); | |
2189 | } | |
5b7d70c6 BD |
2190 | |
2191 | call_gadget(hsotg, disconnect); | |
2192 | } | |
2193 | ||
2194 | /** | |
2195 | * s3c_hsotg_irq_fifoempty - TX FIFO empty interrupt handler | |
2196 | * @hsotg: The device state: | |
2197 | * @periodic: True if this is a periodic FIFO interrupt | |
2198 | */ | |
941fcce4 | 2199 | static void s3c_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic) |
5b7d70c6 BD |
2200 | { |
2201 | struct s3c_hsotg_ep *ep; | |
2202 | int epno, ret; | |
2203 | ||
2204 | /* look through for any more data to transmit */ | |
b3f489b2 | 2205 | for (epno = 0; epno < hsotg->num_of_eps; epno++) { |
c6f5c050 MYK |
2206 | ep = index_to_ep(hsotg, epno, 1); |
2207 | ||
2208 | if (!ep) | |
2209 | continue; | |
5b7d70c6 BD |
2210 | |
2211 | if (!ep->dir_in) | |
2212 | continue; | |
2213 | ||
2214 | if ((periodic && !ep->periodic) || | |
2215 | (!periodic && ep->periodic)) | |
2216 | continue; | |
2217 | ||
2218 | ret = s3c_hsotg_trytx(hsotg, ep); | |
2219 | if (ret < 0) | |
2220 | break; | |
2221 | } | |
2222 | } | |
2223 | ||
5b7d70c6 | 2224 | /* IRQ flags which will trigger a retry around the IRQ loop */ |
47a1685f DN |
2225 | #define IRQ_RETRY_MASK (GINTSTS_NPTXFEMP | \ |
2226 | GINTSTS_PTXFEMP | \ | |
2227 | GINTSTS_RXFLVL) | |
5b7d70c6 | 2228 | |
308d734e LM |
2229 | /** |
2230 | * s3c_hsotg_corereset - issue softreset to the core | |
2231 | * @hsotg: The device state | |
2232 | * | |
2233 | * Issue a soft reset to the core, and await the core finishing it. | |
8b9bc460 | 2234 | */ |
941fcce4 | 2235 | static int s3c_hsotg_corereset(struct dwc2_hsotg *hsotg) |
308d734e LM |
2236 | { |
2237 | int timeout; | |
2238 | u32 grstctl; | |
2239 | ||
2240 | dev_dbg(hsotg->dev, "resetting core\n"); | |
2241 | ||
2242 | /* issue soft reset */ | |
47a1685f | 2243 | writel(GRSTCTL_CSFTRST, hsotg->regs + GRSTCTL); |
308d734e | 2244 | |
2868fea2 | 2245 | timeout = 10000; |
308d734e | 2246 | do { |
94cb8fd6 | 2247 | grstctl = readl(hsotg->regs + GRSTCTL); |
47a1685f | 2248 | } while ((grstctl & GRSTCTL_CSFTRST) && timeout-- > 0); |
308d734e | 2249 | |
47a1685f | 2250 | if (grstctl & GRSTCTL_CSFTRST) { |
308d734e LM |
2251 | dev_err(hsotg->dev, "Failed to get CSftRst asserted\n"); |
2252 | return -EINVAL; | |
2253 | } | |
2254 | ||
2868fea2 | 2255 | timeout = 10000; |
308d734e LM |
2256 | |
2257 | while (1) { | |
94cb8fd6 | 2258 | u32 grstctl = readl(hsotg->regs + GRSTCTL); |
308d734e LM |
2259 | |
2260 | if (timeout-- < 0) { | |
2261 | dev_info(hsotg->dev, | |
2262 | "%s: reset failed, GRSTCTL=%08x\n", | |
2263 | __func__, grstctl); | |
2264 | return -ETIMEDOUT; | |
2265 | } | |
2266 | ||
47a1685f | 2267 | if (!(grstctl & GRSTCTL_AHBIDLE)) |
308d734e LM |
2268 | continue; |
2269 | ||
2270 | break; /* reset done */ | |
2271 | } | |
2272 | ||
2273 | dev_dbg(hsotg->dev, "reset successful\n"); | |
2274 | return 0; | |
2275 | } | |
2276 | ||
8b9bc460 LM |
2277 | /** |
2278 | * s3c_hsotg_core_init - issue softreset to the core | |
2279 | * @hsotg: The device state | |
2280 | * | |
2281 | * Issue a soft reset to the core, and await the core finishing it. | |
2282 | */ | |
643cc4de GH |
2283 | void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, |
2284 | bool is_usb_reset) | |
308d734e | 2285 | { |
643cc4de GH |
2286 | u32 val; |
2287 | ||
2288 | if (!is_usb_reset) | |
2289 | s3c_hsotg_corereset(hsotg); | |
308d734e LM |
2290 | |
2291 | /* | |
2292 | * we must now enable ep0 ready for host detection and then | |
2293 | * set configuration. | |
2294 | */ | |
2295 | ||
2296 | /* set the PLL on, remove the HNP/SRP and set the PHY */ | |
fa4a8d72 | 2297 | val = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5; |
47a1685f | 2298 | writel(hsotg->phyif | GUSBCFG_TOUTCAL(7) | |
f889f23d | 2299 | (val << GUSBCFG_USBTRDTIM_SHIFT), hsotg->regs + GUSBCFG); |
308d734e LM |
2300 | |
2301 | s3c_hsotg_init_fifo(hsotg); | |
2302 | ||
643cc4de GH |
2303 | if (!is_usb_reset) |
2304 | __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON); | |
308d734e | 2305 | |
f889f23d | 2306 | writel(DCFG_EPMISCNT(1) | DCFG_DEVSPD_HS, hsotg->regs + DCFG); |
308d734e LM |
2307 | |
2308 | /* Clear any pending OTG interrupts */ | |
94cb8fd6 | 2309 | writel(0xffffffff, hsotg->regs + GOTGINT); |
308d734e LM |
2310 | |
2311 | /* Clear any pending interrupts */ | |
94cb8fd6 | 2312 | writel(0xffffffff, hsotg->regs + GINTSTS); |
308d734e | 2313 | |
47a1685f DN |
2314 | writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT | |
2315 | GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF | | |
2316 | GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST | | |
4876886f GH |
2317 | GINTSTS_RESETDET | GINTSTS_ENUMDONE | |
2318 | GINTSTS_OTGINT | GINTSTS_USBSUSP | | |
2319 | GINTSTS_WKUPINT, | |
47a1685f | 2320 | hsotg->regs + GINTMSK); |
308d734e LM |
2321 | |
2322 | if (using_dma(hsotg)) | |
47a1685f | 2323 | writel(GAHBCFG_GLBL_INTR_EN | GAHBCFG_DMA_EN | |
5f05048e | 2324 | (GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT), |
94cb8fd6 | 2325 | hsotg->regs + GAHBCFG); |
308d734e | 2326 | else |
47a1685f DN |
2327 | writel(((hsotg->dedicated_fifos) ? (GAHBCFG_NP_TXF_EMP_LVL | |
2328 | GAHBCFG_P_TXF_EMP_LVL) : 0) | | |
2329 | GAHBCFG_GLBL_INTR_EN, | |
8acc8296 | 2330 | hsotg->regs + GAHBCFG); |
308d734e LM |
2331 | |
2332 | /* | |
8acc8296 RB |
2333 | * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts |
2334 | * when we have no data to transfer. Otherwise we get being flooded by | |
2335 | * interrupts. | |
308d734e LM |
2336 | */ |
2337 | ||
6ff2e832 MYK |
2338 | writel(((hsotg->dedicated_fifos && !using_dma(hsotg)) ? |
2339 | DIEPMSK_TXFIFOEMPTY | DIEPMSK_INTKNTXFEMPMSK : 0) | | |
47a1685f DN |
2340 | DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK | |
2341 | DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK | | |
2342 | DIEPMSK_INTKNEPMISMSK, | |
2343 | hsotg->regs + DIEPMSK); | |
308d734e LM |
2344 | |
2345 | /* | |
2346 | * don't need XferCompl, we get that from RXFIFO in slave mode. In | |
2347 | * DMA mode we may need this. | |
2348 | */ | |
47a1685f DN |
2349 | writel((using_dma(hsotg) ? (DIEPMSK_XFERCOMPLMSK | |
2350 | DIEPMSK_TIMEOUTMSK) : 0) | | |
2351 | DOEPMSK_EPDISBLDMSK | DOEPMSK_AHBERRMSK | | |
2352 | DOEPMSK_SETUPMSK, | |
2353 | hsotg->regs + DOEPMSK); | |
308d734e | 2354 | |
94cb8fd6 | 2355 | writel(0, hsotg->regs + DAINTMSK); |
308d734e LM |
2356 | |
2357 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
94cb8fd6 LM |
2358 | readl(hsotg->regs + DIEPCTL0), |
2359 | readl(hsotg->regs + DOEPCTL0)); | |
308d734e LM |
2360 | |
2361 | /* enable in and out endpoint interrupts */ | |
47a1685f | 2362 | s3c_hsotg_en_gsint(hsotg, GINTSTS_OEPINT | GINTSTS_IEPINT); |
308d734e LM |
2363 | |
2364 | /* | |
2365 | * Enable the RXFIFO when in slave mode, as this is how we collect | |
2366 | * the data. In DMA mode, we get events from the FIFO but also | |
2367 | * things we cannot process, so do not use it. | |
2368 | */ | |
2369 | if (!using_dma(hsotg)) | |
47a1685f | 2370 | s3c_hsotg_en_gsint(hsotg, GINTSTS_RXFLVL); |
308d734e LM |
2371 | |
2372 | /* Enable interrupts for EP0 in and out */ | |
2373 | s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1); | |
2374 | s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1); | |
2375 | ||
643cc4de GH |
2376 | if (!is_usb_reset) { |
2377 | __orr32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE); | |
2378 | udelay(10); /* see openiboot */ | |
2379 | __bic32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE); | |
2380 | } | |
308d734e | 2381 | |
94cb8fd6 | 2382 | dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + DCTL)); |
308d734e LM |
2383 | |
2384 | /* | |
94cb8fd6 | 2385 | * DxEPCTL_USBActEp says RO in manual, but seems to be set by |
308d734e LM |
2386 | * writing to the EPCTL register.. |
2387 | */ | |
2388 | ||
2389 | /* set to read 1 8byte packet */ | |
47a1685f DN |
2390 | writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) | |
2391 | DXEPTSIZ_XFERSIZE(8), hsotg->regs + DOEPTSIZ0); | |
308d734e | 2392 | |
c6f5c050 | 2393 | writel(s3c_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) | |
47a1685f DN |
2394 | DXEPCTL_CNAK | DXEPCTL_EPENA | |
2395 | DXEPCTL_USBACTEP, | |
94cb8fd6 | 2396 | hsotg->regs + DOEPCTL0); |
308d734e LM |
2397 | |
2398 | /* enable, but don't activate EP0in */ | |
c6f5c050 | 2399 | writel(s3c_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) | |
47a1685f | 2400 | DXEPCTL_USBACTEP, hsotg->regs + DIEPCTL0); |
308d734e LM |
2401 | |
2402 | s3c_hsotg_enqueue_setup(hsotg); | |
2403 | ||
2404 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
94cb8fd6 LM |
2405 | readl(hsotg->regs + DIEPCTL0), |
2406 | readl(hsotg->regs + DOEPCTL0)); | |
308d734e LM |
2407 | |
2408 | /* clear global NAKs */ | |
643cc4de GH |
2409 | val = DCTL_CGOUTNAK | DCTL_CGNPINNAK; |
2410 | if (!is_usb_reset) | |
2411 | val |= DCTL_SFTDISCON; | |
2412 | __orr32(hsotg->regs + DCTL, val); | |
308d734e LM |
2413 | |
2414 | /* must be at-least 3ms to allow bus to see disconnect */ | |
2415 | mdelay(3); | |
2416 | ||
ac3c81f3 | 2417 | hsotg->last_rst = jiffies; |
ad38dc5d MS |
2418 | } |
2419 | ||
941fcce4 | 2420 | static void s3c_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) |
ad38dc5d MS |
2421 | { |
2422 | /* set the soft-disconnect bit */ | |
2423 | __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON); | |
2424 | } | |
ac3c81f3 | 2425 | |
510ffaa4 | 2426 | void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg) |
ad38dc5d | 2427 | { |
308d734e | 2428 | /* remove the soft-disconnect and let's go */ |
47a1685f | 2429 | __bic32(hsotg->regs + DCTL, DCTL_SFTDISCON); |
308d734e LM |
2430 | } |
2431 | ||
5b7d70c6 BD |
2432 | /** |
2433 | * s3c_hsotg_irq - handle device interrupt | |
2434 | * @irq: The IRQ number triggered | |
2435 | * @pw: The pw value when registered the handler. | |
2436 | */ | |
2437 | static irqreturn_t s3c_hsotg_irq(int irq, void *pw) | |
2438 | { | |
941fcce4 | 2439 | struct dwc2_hsotg *hsotg = pw; |
5b7d70c6 BD |
2440 | int retry_count = 8; |
2441 | u32 gintsts; | |
2442 | u32 gintmsk; | |
2443 | ||
5ad1d316 | 2444 | spin_lock(&hsotg->lock); |
5b7d70c6 | 2445 | irq_retry: |
94cb8fd6 LM |
2446 | gintsts = readl(hsotg->regs + GINTSTS); |
2447 | gintmsk = readl(hsotg->regs + GINTMSK); | |
5b7d70c6 BD |
2448 | |
2449 | dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n", | |
2450 | __func__, gintsts, gintsts & gintmsk, gintmsk, retry_count); | |
2451 | ||
2452 | gintsts &= gintmsk; | |
2453 | ||
47a1685f DN |
2454 | if (gintsts & GINTSTS_ENUMDONE) { |
2455 | writel(GINTSTS_ENUMDONE, hsotg->regs + GINTSTS); | |
a3395f0d AT |
2456 | |
2457 | s3c_hsotg_irq_enumdone(hsotg); | |
5b7d70c6 BD |
2458 | } |
2459 | ||
47a1685f | 2460 | if (gintsts & (GINTSTS_OEPINT | GINTSTS_IEPINT)) { |
94cb8fd6 | 2461 | u32 daint = readl(hsotg->regs + DAINT); |
7e804650 RB |
2462 | u32 daintmsk = readl(hsotg->regs + DAINTMSK); |
2463 | u32 daint_out, daint_in; | |
5b7d70c6 BD |
2464 | int ep; |
2465 | ||
7e804650 | 2466 | daint &= daintmsk; |
47a1685f DN |
2467 | daint_out = daint >> DAINT_OUTEP_SHIFT; |
2468 | daint_in = daint & ~(daint_out << DAINT_OUTEP_SHIFT); | |
7e804650 | 2469 | |
5b7d70c6 BD |
2470 | dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint); |
2471 | ||
cec87f1d MYK |
2472 | for (ep = 0; ep < hsotg->num_of_eps && daint_out; |
2473 | ep++, daint_out >>= 1) { | |
5b7d70c6 BD |
2474 | if (daint_out & 1) |
2475 | s3c_hsotg_epint(hsotg, ep, 0); | |
2476 | } | |
2477 | ||
cec87f1d MYK |
2478 | for (ep = 0; ep < hsotg->num_of_eps && daint_in; |
2479 | ep++, daint_in >>= 1) { | |
5b7d70c6 BD |
2480 | if (daint_in & 1) |
2481 | s3c_hsotg_epint(hsotg, ep, 1); | |
2482 | } | |
5b7d70c6 BD |
2483 | } |
2484 | ||
4876886f GH |
2485 | if (gintsts & GINTSTS_RESETDET) { |
2486 | dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__); | |
2487 | ||
2488 | writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS); | |
2489 | ||
2490 | /* This event must be used only if controller is suspended */ | |
2491 | if (hsotg->lx_state == DWC2_L2) { | |
2492 | dwc2_exit_hibernation(hsotg, true); | |
2493 | hsotg->lx_state = DWC2_L0; | |
2494 | } | |
2495 | } | |
2496 | ||
2497 | if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) { | |
12a1f4dc | 2498 | |
94cb8fd6 | 2499 | u32 usb_status = readl(hsotg->regs + GOTGCTL); |
12a1f4dc | 2500 | |
9599815d | 2501 | dev_dbg(hsotg->dev, "%s: USBRst\n", __func__); |
5b7d70c6 | 2502 | dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", |
94cb8fd6 | 2503 | readl(hsotg->regs + GNPTXSTS)); |
5b7d70c6 | 2504 | |
47a1685f | 2505 | writel(GINTSTS_USBRST, hsotg->regs + GINTSTS); |
a3395f0d | 2506 | |
6d713c15 MYK |
2507 | /* Report disconnection if it is not already done. */ |
2508 | s3c_hsotg_disconnect(hsotg); | |
2509 | ||
94cb8fd6 | 2510 | if (usb_status & GOTGCTL_BSESVLD) { |
12a1f4dc LM |
2511 | if (time_after(jiffies, hsotg->last_rst + |
2512 | msecs_to_jiffies(200))) { | |
5b7d70c6 | 2513 | |
c6f5c050 | 2514 | kill_all_requests(hsotg, hsotg->eps_out[0], |
6b448af4 | 2515 | -ECONNRESET); |
5b7d70c6 | 2516 | |
18b2b37c | 2517 | hsotg->lx_state = DWC2_L0; |
643cc4de | 2518 | s3c_hsotg_core_init_disconnected(hsotg, true); |
12a1f4dc LM |
2519 | } |
2520 | } | |
5b7d70c6 BD |
2521 | } |
2522 | ||
2523 | /* check both FIFOs */ | |
2524 | ||
47a1685f | 2525 | if (gintsts & GINTSTS_NPTXFEMP) { |
5b7d70c6 BD |
2526 | dev_dbg(hsotg->dev, "NPTxFEmp\n"); |
2527 | ||
8b9bc460 LM |
2528 | /* |
2529 | * Disable the interrupt to stop it happening again | |
5b7d70c6 | 2530 | * unless one of these endpoint routines decides that |
8b9bc460 LM |
2531 | * it needs re-enabling |
2532 | */ | |
5b7d70c6 | 2533 | |
47a1685f | 2534 | s3c_hsotg_disable_gsint(hsotg, GINTSTS_NPTXFEMP); |
5b7d70c6 | 2535 | s3c_hsotg_irq_fifoempty(hsotg, false); |
5b7d70c6 BD |
2536 | } |
2537 | ||
47a1685f | 2538 | if (gintsts & GINTSTS_PTXFEMP) { |
5b7d70c6 BD |
2539 | dev_dbg(hsotg->dev, "PTxFEmp\n"); |
2540 | ||
94cb8fd6 | 2541 | /* See note in GINTSTS_NPTxFEmp */ |
5b7d70c6 | 2542 | |
47a1685f | 2543 | s3c_hsotg_disable_gsint(hsotg, GINTSTS_PTXFEMP); |
5b7d70c6 | 2544 | s3c_hsotg_irq_fifoempty(hsotg, true); |
5b7d70c6 BD |
2545 | } |
2546 | ||
47a1685f | 2547 | if (gintsts & GINTSTS_RXFLVL) { |
8b9bc460 LM |
2548 | /* |
2549 | * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty, | |
5b7d70c6 | 2550 | * we need to retry s3c_hsotg_handle_rx if this is still |
8b9bc460 LM |
2551 | * set. |
2552 | */ | |
5b7d70c6 BD |
2553 | |
2554 | s3c_hsotg_handle_rx(hsotg); | |
5b7d70c6 BD |
2555 | } |
2556 | ||
47a1685f | 2557 | if (gintsts & GINTSTS_ERLYSUSP) { |
94cb8fd6 | 2558 | dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n"); |
47a1685f | 2559 | writel(GINTSTS_ERLYSUSP, hsotg->regs + GINTSTS); |
5b7d70c6 BD |
2560 | } |
2561 | ||
8b9bc460 LM |
2562 | /* |
2563 | * these next two seem to crop-up occasionally causing the core | |
5b7d70c6 | 2564 | * to shutdown the USB transfer, so try clearing them and logging |
8b9bc460 LM |
2565 | * the occurrence. |
2566 | */ | |
5b7d70c6 | 2567 | |
47a1685f | 2568 | if (gintsts & GINTSTS_GOUTNAKEFF) { |
5b7d70c6 BD |
2569 | dev_info(hsotg->dev, "GOUTNakEff triggered\n"); |
2570 | ||
47a1685f | 2571 | writel(DCTL_CGOUTNAK, hsotg->regs + DCTL); |
a3395f0d AT |
2572 | |
2573 | s3c_hsotg_dump(hsotg); | |
5b7d70c6 BD |
2574 | } |
2575 | ||
47a1685f | 2576 | if (gintsts & GINTSTS_GINNAKEFF) { |
5b7d70c6 BD |
2577 | dev_info(hsotg->dev, "GINNakEff triggered\n"); |
2578 | ||
47a1685f | 2579 | writel(DCTL_CGNPINNAK, hsotg->regs + DCTL); |
a3395f0d AT |
2580 | |
2581 | s3c_hsotg_dump(hsotg); | |
5b7d70c6 BD |
2582 | } |
2583 | ||
8b9bc460 LM |
2584 | /* |
2585 | * if we've had fifo events, we should try and go around the | |
2586 | * loop again to see if there's any point in returning yet. | |
2587 | */ | |
5b7d70c6 BD |
2588 | |
2589 | if (gintsts & IRQ_RETRY_MASK && --retry_count > 0) | |
2590 | goto irq_retry; | |
2591 | ||
5ad1d316 LM |
2592 | spin_unlock(&hsotg->lock); |
2593 | ||
5b7d70c6 BD |
2594 | return IRQ_HANDLED; |
2595 | } | |
2596 | ||
2597 | /** | |
2598 | * s3c_hsotg_ep_enable - enable the given endpoint | |
2599 | * @ep: The USB endpint to configure | |
2600 | * @desc: The USB endpoint descriptor to configure with. | |
2601 | * | |
2602 | * This is called from the USB gadget code's usb_ep_enable(). | |
8b9bc460 | 2603 | */ |
5b7d70c6 BD |
2604 | static int s3c_hsotg_ep_enable(struct usb_ep *ep, |
2605 | const struct usb_endpoint_descriptor *desc) | |
2606 | { | |
2607 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 2608 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 | 2609 | unsigned long flags; |
ca4c55ad | 2610 | unsigned int index = hs_ep->index; |
5b7d70c6 BD |
2611 | u32 epctrl_reg; |
2612 | u32 epctrl; | |
2613 | u32 mps; | |
ca4c55ad MYK |
2614 | unsigned int dir_in; |
2615 | unsigned int i, val, size; | |
19c190f9 | 2616 | int ret = 0; |
5b7d70c6 BD |
2617 | |
2618 | dev_dbg(hsotg->dev, | |
2619 | "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", | |
2620 | __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes, | |
2621 | desc->wMaxPacketSize, desc->bInterval); | |
2622 | ||
2623 | /* not to be called for EP0 */ | |
2624 | WARN_ON(index == 0); | |
2625 | ||
2626 | dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0; | |
2627 | if (dir_in != hs_ep->dir_in) { | |
2628 | dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__); | |
2629 | return -EINVAL; | |
2630 | } | |
2631 | ||
29cc8897 | 2632 | mps = usb_endpoint_maxp(desc); |
5b7d70c6 BD |
2633 | |
2634 | /* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */ | |
2635 | ||
94cb8fd6 | 2636 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
5b7d70c6 BD |
2637 | epctrl = readl(hsotg->regs + epctrl_reg); |
2638 | ||
2639 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n", | |
2640 | __func__, epctrl, epctrl_reg); | |
2641 | ||
22258f49 | 2642 | spin_lock_irqsave(&hsotg->lock, flags); |
5b7d70c6 | 2643 | |
47a1685f DN |
2644 | epctrl &= ~(DXEPCTL_EPTYPE_MASK | DXEPCTL_MPS_MASK); |
2645 | epctrl |= DXEPCTL_MPS(mps); | |
5b7d70c6 | 2646 | |
8b9bc460 LM |
2647 | /* |
2648 | * mark the endpoint as active, otherwise the core may ignore | |
2649 | * transactions entirely for this endpoint | |
2650 | */ | |
47a1685f | 2651 | epctrl |= DXEPCTL_USBACTEP; |
5b7d70c6 | 2652 | |
8b9bc460 LM |
2653 | /* |
2654 | * set the NAK status on the endpoint, otherwise we might try and | |
5b7d70c6 BD |
2655 | * do something with data that we've yet got a request to process |
2656 | * since the RXFIFO will take data for an endpoint even if the | |
2657 | * size register hasn't been set. | |
2658 | */ | |
2659 | ||
47a1685f | 2660 | epctrl |= DXEPCTL_SNAK; |
5b7d70c6 BD |
2661 | |
2662 | /* update the endpoint state */ | |
c6f5c050 | 2663 | s3c_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps, dir_in); |
5b7d70c6 BD |
2664 | |
2665 | /* default, set to non-periodic */ | |
1479e841 | 2666 | hs_ep->isochronous = 0; |
5b7d70c6 | 2667 | hs_ep->periodic = 0; |
a18ed7b0 | 2668 | hs_ep->halted = 0; |
1479e841 | 2669 | hs_ep->interval = desc->bInterval; |
5b7d70c6 | 2670 | |
4fca54aa RB |
2671 | if (hs_ep->interval > 1 && hs_ep->mc > 1) |
2672 | dev_err(hsotg->dev, "MC > 1 when interval is not 1\n"); | |
2673 | ||
5b7d70c6 BD |
2674 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
2675 | case USB_ENDPOINT_XFER_ISOC: | |
47a1685f DN |
2676 | epctrl |= DXEPCTL_EPTYPE_ISO; |
2677 | epctrl |= DXEPCTL_SETEVENFR; | |
1479e841 RB |
2678 | hs_ep->isochronous = 1; |
2679 | if (dir_in) | |
2680 | hs_ep->periodic = 1; | |
2681 | break; | |
5b7d70c6 BD |
2682 | |
2683 | case USB_ENDPOINT_XFER_BULK: | |
47a1685f | 2684 | epctrl |= DXEPCTL_EPTYPE_BULK; |
5b7d70c6 BD |
2685 | break; |
2686 | ||
2687 | case USB_ENDPOINT_XFER_INT: | |
b203d0a2 | 2688 | if (dir_in) |
5b7d70c6 | 2689 | hs_ep->periodic = 1; |
5b7d70c6 | 2690 | |
47a1685f | 2691 | epctrl |= DXEPCTL_EPTYPE_INTERRUPT; |
5b7d70c6 BD |
2692 | break; |
2693 | ||
2694 | case USB_ENDPOINT_XFER_CONTROL: | |
47a1685f | 2695 | epctrl |= DXEPCTL_EPTYPE_CONTROL; |
5b7d70c6 BD |
2696 | break; |
2697 | } | |
2698 | ||
4556e12c MYK |
2699 | /* If fifo is already allocated for this ep */ |
2700 | if (hs_ep->fifo_index) { | |
2701 | size = hs_ep->ep.maxpacket * hs_ep->mc; | |
2702 | /* If bigger fifo is required deallocate current one */ | |
2703 | if (size > hs_ep->fifo_size) { | |
2704 | hsotg->fifo_map &= ~(1 << hs_ep->fifo_index); | |
2705 | hs_ep->fifo_index = 0; | |
2706 | hs_ep->fifo_size = 0; | |
2707 | } | |
2708 | } | |
2709 | ||
8b9bc460 LM |
2710 | /* |
2711 | * if the hardware has dedicated fifos, we must give each IN EP | |
10aebc77 BD |
2712 | * a unique tx-fifo even if it is non-periodic. |
2713 | */ | |
4556e12c | 2714 | if (dir_in && hsotg->dedicated_fifos && !hs_ep->fifo_index) { |
ca4c55ad MYK |
2715 | u32 fifo_index = 0; |
2716 | u32 fifo_size = UINT_MAX; | |
b203d0a2 | 2717 | size = hs_ep->ep.maxpacket*hs_ep->mc; |
5f2196bd | 2718 | for (i = 1; i < hsotg->num_of_eps; ++i) { |
b203d0a2 RB |
2719 | if (hsotg->fifo_map & (1<<i)) |
2720 | continue; | |
2721 | val = readl(hsotg->regs + DPTXFSIZN(i)); | |
2722 | val = (val >> FIFOSIZE_DEPTH_SHIFT)*4; | |
2723 | if (val < size) | |
2724 | continue; | |
ca4c55ad MYK |
2725 | /* Search for smallest acceptable fifo */ |
2726 | if (val < fifo_size) { | |
2727 | fifo_size = val; | |
2728 | fifo_index = i; | |
2729 | } | |
b203d0a2 | 2730 | } |
ca4c55ad | 2731 | if (!fifo_index) { |
5f2196bd MYK |
2732 | dev_err(hsotg->dev, |
2733 | "%s: No suitable fifo found\n", __func__); | |
b585a48b SM |
2734 | ret = -ENOMEM; |
2735 | goto error; | |
2736 | } | |
ca4c55ad MYK |
2737 | hsotg->fifo_map |= 1 << fifo_index; |
2738 | epctrl |= DXEPCTL_TXFNUM(fifo_index); | |
2739 | hs_ep->fifo_index = fifo_index; | |
2740 | hs_ep->fifo_size = fifo_size; | |
b203d0a2 | 2741 | } |
10aebc77 | 2742 | |
5b7d70c6 BD |
2743 | /* for non control endpoints, set PID to D0 */ |
2744 | if (index) | |
47a1685f | 2745 | epctrl |= DXEPCTL_SETD0PID; |
5b7d70c6 BD |
2746 | |
2747 | dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n", | |
2748 | __func__, epctrl); | |
2749 | ||
2750 | writel(epctrl, hsotg->regs + epctrl_reg); | |
2751 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n", | |
2752 | __func__, readl(hsotg->regs + epctrl_reg)); | |
2753 | ||
2754 | /* enable the endpoint interrupt */ | |
2755 | s3c_hsotg_ctrl_epint(hsotg, index, dir_in, 1); | |
2756 | ||
b585a48b | 2757 | error: |
22258f49 | 2758 | spin_unlock_irqrestore(&hsotg->lock, flags); |
19c190f9 | 2759 | return ret; |
5b7d70c6 BD |
2760 | } |
2761 | ||
8b9bc460 LM |
2762 | /** |
2763 | * s3c_hsotg_ep_disable - disable given endpoint | |
2764 | * @ep: The endpoint to disable. | |
2765 | */ | |
31bebf4a | 2766 | static int s3c_hsotg_ep_disable(struct usb_ep *ep) |
5b7d70c6 BD |
2767 | { |
2768 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 2769 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
2770 | int dir_in = hs_ep->dir_in; |
2771 | int index = hs_ep->index; | |
2772 | unsigned long flags; | |
2773 | u32 epctrl_reg; | |
2774 | u32 ctrl; | |
2775 | ||
1e011293 | 2776 | dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep); |
5b7d70c6 | 2777 | |
c6f5c050 | 2778 | if (ep == &hsotg->eps_out[0]->ep) { |
5b7d70c6 BD |
2779 | dev_err(hsotg->dev, "%s: called for ep0\n", __func__); |
2780 | return -EINVAL; | |
2781 | } | |
2782 | ||
94cb8fd6 | 2783 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
5b7d70c6 | 2784 | |
5ad1d316 | 2785 | spin_lock_irqsave(&hsotg->lock, flags); |
5b7d70c6 | 2786 | |
b203d0a2 RB |
2787 | hsotg->fifo_map &= ~(1<<hs_ep->fifo_index); |
2788 | hs_ep->fifo_index = 0; | |
2789 | hs_ep->fifo_size = 0; | |
5b7d70c6 BD |
2790 | |
2791 | ctrl = readl(hsotg->regs + epctrl_reg); | |
47a1685f DN |
2792 | ctrl &= ~DXEPCTL_EPENA; |
2793 | ctrl &= ~DXEPCTL_USBACTEP; | |
2794 | ctrl |= DXEPCTL_SNAK; | |
5b7d70c6 BD |
2795 | |
2796 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); | |
2797 | writel(ctrl, hsotg->regs + epctrl_reg); | |
2798 | ||
2799 | /* disable endpoint interrupts */ | |
2800 | s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0); | |
2801 | ||
1141ea01 MYK |
2802 | /* terminate all requests with shutdown */ |
2803 | kill_all_requests(hsotg, hs_ep, -ESHUTDOWN); | |
2804 | ||
22258f49 | 2805 | spin_unlock_irqrestore(&hsotg->lock, flags); |
5b7d70c6 BD |
2806 | return 0; |
2807 | } | |
2808 | ||
2809 | /** | |
2810 | * on_list - check request is on the given endpoint | |
2811 | * @ep: The endpoint to check. | |
2812 | * @test: The request to test if it is on the endpoint. | |
8b9bc460 | 2813 | */ |
5b7d70c6 BD |
2814 | static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test) |
2815 | { | |
2816 | struct s3c_hsotg_req *req, *treq; | |
2817 | ||
2818 | list_for_each_entry_safe(req, treq, &ep->queue, queue) { | |
2819 | if (req == test) | |
2820 | return true; | |
2821 | } | |
2822 | ||
2823 | return false; | |
2824 | } | |
2825 | ||
8b9bc460 LM |
2826 | /** |
2827 | * s3c_hsotg_ep_dequeue - dequeue given endpoint | |
2828 | * @ep: The endpoint to dequeue. | |
2829 | * @req: The request to be removed from a queue. | |
2830 | */ | |
5b7d70c6 BD |
2831 | static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) |
2832 | { | |
2833 | struct s3c_hsotg_req *hs_req = our_req(req); | |
2834 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 2835 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 BD |
2836 | unsigned long flags; |
2837 | ||
1e011293 | 2838 | dev_dbg(hs->dev, "ep_dequeue(%p,%p)\n", ep, req); |
5b7d70c6 | 2839 | |
22258f49 | 2840 | spin_lock_irqsave(&hs->lock, flags); |
5b7d70c6 BD |
2841 | |
2842 | if (!on_list(hs_ep, hs_req)) { | |
22258f49 | 2843 | spin_unlock_irqrestore(&hs->lock, flags); |
5b7d70c6 BD |
2844 | return -EINVAL; |
2845 | } | |
2846 | ||
2847 | s3c_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET); | |
22258f49 | 2848 | spin_unlock_irqrestore(&hs->lock, flags); |
5b7d70c6 BD |
2849 | |
2850 | return 0; | |
2851 | } | |
2852 | ||
8b9bc460 LM |
2853 | /** |
2854 | * s3c_hsotg_ep_sethalt - set halt on a given endpoint | |
2855 | * @ep: The endpoint to set halt. | |
2856 | * @value: Set or unset the halt. | |
2857 | */ | |
5b7d70c6 BD |
2858 | static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value) |
2859 | { | |
2860 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 2861 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 | 2862 | int index = hs_ep->index; |
5b7d70c6 BD |
2863 | u32 epreg; |
2864 | u32 epctl; | |
9c39ddc6 | 2865 | u32 xfertype; |
5b7d70c6 BD |
2866 | |
2867 | dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value); | |
2868 | ||
c9f721b2 RB |
2869 | if (index == 0) { |
2870 | if (value) | |
2871 | s3c_hsotg_stall_ep0(hs); | |
2872 | else | |
2873 | dev_warn(hs->dev, | |
2874 | "%s: can't clear halt on ep0\n", __func__); | |
2875 | return 0; | |
2876 | } | |
2877 | ||
c6f5c050 MYK |
2878 | if (hs_ep->dir_in) { |
2879 | epreg = DIEPCTL(index); | |
2880 | epctl = readl(hs->regs + epreg); | |
2881 | ||
2882 | if (value) { | |
2883 | epctl |= DXEPCTL_STALL + DXEPCTL_SNAK; | |
2884 | if (epctl & DXEPCTL_EPENA) | |
2885 | epctl |= DXEPCTL_EPDIS; | |
2886 | } else { | |
2887 | epctl &= ~DXEPCTL_STALL; | |
2888 | xfertype = epctl & DXEPCTL_EPTYPE_MASK; | |
2889 | if (xfertype == DXEPCTL_EPTYPE_BULK || | |
2890 | xfertype == DXEPCTL_EPTYPE_INTERRUPT) | |
2891 | epctl |= DXEPCTL_SETD0PID; | |
2892 | } | |
2893 | writel(epctl, hs->regs + epreg); | |
9c39ddc6 | 2894 | } else { |
5b7d70c6 | 2895 | |
c6f5c050 MYK |
2896 | epreg = DOEPCTL(index); |
2897 | epctl = readl(hs->regs + epreg); | |
5b7d70c6 | 2898 | |
c6f5c050 MYK |
2899 | if (value) |
2900 | epctl |= DXEPCTL_STALL; | |
2901 | else { | |
2902 | epctl &= ~DXEPCTL_STALL; | |
2903 | xfertype = epctl & DXEPCTL_EPTYPE_MASK; | |
2904 | if (xfertype == DXEPCTL_EPTYPE_BULK || | |
2905 | xfertype == DXEPCTL_EPTYPE_INTERRUPT) | |
2906 | epctl |= DXEPCTL_SETD0PID; | |
2907 | } | |
2908 | writel(epctl, hs->regs + epreg); | |
9c39ddc6 | 2909 | } |
5b7d70c6 | 2910 | |
a18ed7b0 RB |
2911 | hs_ep->halted = value; |
2912 | ||
5b7d70c6 BD |
2913 | return 0; |
2914 | } | |
2915 | ||
5ad1d316 LM |
2916 | /** |
2917 | * s3c_hsotg_ep_sethalt_lock - set halt on a given endpoint with lock held | |
2918 | * @ep: The endpoint to set halt. | |
2919 | * @value: Set or unset the halt. | |
2920 | */ | |
2921 | static int s3c_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value) | |
2922 | { | |
2923 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 2924 | struct dwc2_hsotg *hs = hs_ep->parent; |
5ad1d316 LM |
2925 | unsigned long flags = 0; |
2926 | int ret = 0; | |
2927 | ||
2928 | spin_lock_irqsave(&hs->lock, flags); | |
2929 | ret = s3c_hsotg_ep_sethalt(ep, value); | |
2930 | spin_unlock_irqrestore(&hs->lock, flags); | |
2931 | ||
2932 | return ret; | |
2933 | } | |
2934 | ||
5b7d70c6 BD |
2935 | static struct usb_ep_ops s3c_hsotg_ep_ops = { |
2936 | .enable = s3c_hsotg_ep_enable, | |
2937 | .disable = s3c_hsotg_ep_disable, | |
2938 | .alloc_request = s3c_hsotg_ep_alloc_request, | |
2939 | .free_request = s3c_hsotg_ep_free_request, | |
5ad1d316 | 2940 | .queue = s3c_hsotg_ep_queue_lock, |
5b7d70c6 | 2941 | .dequeue = s3c_hsotg_ep_dequeue, |
5ad1d316 | 2942 | .set_halt = s3c_hsotg_ep_sethalt_lock, |
25985edc | 2943 | /* note, don't believe we have any call for the fifo routines */ |
5b7d70c6 BD |
2944 | }; |
2945 | ||
41188786 LM |
2946 | /** |
2947 | * s3c_hsotg_phy_enable - enable platform phy dev | |
8b9bc460 | 2948 | * @hsotg: The driver state |
41188786 LM |
2949 | * |
2950 | * A wrapper for platform code responsible for controlling | |
2951 | * low-level USB code | |
2952 | */ | |
941fcce4 | 2953 | static void s3c_hsotg_phy_enable(struct dwc2_hsotg *hsotg) |
41188786 LM |
2954 | { |
2955 | struct platform_device *pdev = to_platform_device(hsotg->dev); | |
2956 | ||
2957 | dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev); | |
b2e587db | 2958 | |
ca2c5ba8 | 2959 | if (hsotg->uphy) |
74084844 | 2960 | usb_phy_init(hsotg->uphy); |
ca2c5ba8 | 2961 | else if (hsotg->plat && hsotg->plat->phy_init) |
41188786 | 2962 | hsotg->plat->phy_init(pdev, hsotg->plat->phy_type); |
ca2c5ba8 KD |
2963 | else { |
2964 | phy_init(hsotg->phy); | |
2965 | phy_power_on(hsotg->phy); | |
2966 | } | |
41188786 LM |
2967 | } |
2968 | ||
2969 | /** | |
2970 | * s3c_hsotg_phy_disable - disable platform phy dev | |
8b9bc460 | 2971 | * @hsotg: The driver state |
41188786 LM |
2972 | * |
2973 | * A wrapper for platform code responsible for controlling | |
2974 | * low-level USB code | |
2975 | */ | |
941fcce4 | 2976 | static void s3c_hsotg_phy_disable(struct dwc2_hsotg *hsotg) |
41188786 LM |
2977 | { |
2978 | struct platform_device *pdev = to_platform_device(hsotg->dev); | |
2979 | ||
ca2c5ba8 | 2980 | if (hsotg->uphy) |
74084844 | 2981 | usb_phy_shutdown(hsotg->uphy); |
ca2c5ba8 | 2982 | else if (hsotg->plat && hsotg->plat->phy_exit) |
41188786 | 2983 | hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type); |
ca2c5ba8 KD |
2984 | else { |
2985 | phy_power_off(hsotg->phy); | |
2986 | phy_exit(hsotg->phy); | |
2987 | } | |
41188786 LM |
2988 | } |
2989 | ||
8b9bc460 LM |
2990 | /** |
2991 | * s3c_hsotg_init - initalize the usb core | |
2992 | * @hsotg: The driver state | |
2993 | */ | |
941fcce4 | 2994 | static void s3c_hsotg_init(struct dwc2_hsotg *hsotg) |
b3f489b2 | 2995 | { |
fa4a8d72 | 2996 | u32 trdtim; |
b3f489b2 LM |
2997 | /* unmask subset of endpoint interrupts */ |
2998 | ||
47a1685f DN |
2999 | writel(DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK | |
3000 | DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK, | |
3001 | hsotg->regs + DIEPMSK); | |
b3f489b2 | 3002 | |
47a1685f DN |
3003 | writel(DOEPMSK_SETUPMSK | DOEPMSK_AHBERRMSK | |
3004 | DOEPMSK_EPDISBLDMSK | DOEPMSK_XFERCOMPLMSK, | |
3005 | hsotg->regs + DOEPMSK); | |
b3f489b2 | 3006 | |
94cb8fd6 | 3007 | writel(0, hsotg->regs + DAINTMSK); |
b3f489b2 LM |
3008 | |
3009 | /* Be in disconnected state until gadget is registered */ | |
47a1685f | 3010 | __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON); |
b3f489b2 | 3011 | |
b3f489b2 LM |
3012 | /* setup fifos */ |
3013 | ||
3014 | dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
94cb8fd6 LM |
3015 | readl(hsotg->regs + GRXFSIZ), |
3016 | readl(hsotg->regs + GNPTXFSIZ)); | |
b3f489b2 LM |
3017 | |
3018 | s3c_hsotg_init_fifo(hsotg); | |
3019 | ||
3020 | /* set the PLL on, remove the HNP/SRP and set the PHY */ | |
fa4a8d72 MYK |
3021 | trdtim = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5; |
3022 | writel(hsotg->phyif | GUSBCFG_TOUTCAL(7) | | |
f889f23d | 3023 | (trdtim << GUSBCFG_USBTRDTIM_SHIFT), |
fa4a8d72 | 3024 | hsotg->regs + GUSBCFG); |
b3f489b2 | 3025 | |
f5090044 GH |
3026 | if (using_dma(hsotg)) |
3027 | __orr32(hsotg->regs + GAHBCFG, GAHBCFG_DMA_EN); | |
b3f489b2 LM |
3028 | } |
3029 | ||
8b9bc460 LM |
3030 | /** |
3031 | * s3c_hsotg_udc_start - prepare the udc for work | |
3032 | * @gadget: The usb gadget state | |
3033 | * @driver: The usb gadget driver | |
3034 | * | |
3035 | * Perform initialization to prepare udc device and driver | |
3036 | * to work. | |
3037 | */ | |
f65f0f10 LM |
3038 | static int s3c_hsotg_udc_start(struct usb_gadget *gadget, |
3039 | struct usb_gadget_driver *driver) | |
5b7d70c6 | 3040 | { |
941fcce4 | 3041 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
5b9451f8 | 3042 | unsigned long flags; |
5b7d70c6 BD |
3043 | int ret; |
3044 | ||
3045 | if (!hsotg) { | |
a023da33 | 3046 | pr_err("%s: called with no device\n", __func__); |
5b7d70c6 BD |
3047 | return -ENODEV; |
3048 | } | |
3049 | ||
3050 | if (!driver) { | |
3051 | dev_err(hsotg->dev, "%s: no driver\n", __func__); | |
3052 | return -EINVAL; | |
3053 | } | |
3054 | ||
7177aed4 | 3055 | if (driver->max_speed < USB_SPEED_FULL) |
5b7d70c6 | 3056 | dev_err(hsotg->dev, "%s: bad speed\n", __func__); |
5b7d70c6 | 3057 | |
f65f0f10 | 3058 | if (!driver->setup) { |
5b7d70c6 BD |
3059 | dev_err(hsotg->dev, "%s: missing entry points\n", __func__); |
3060 | return -EINVAL; | |
3061 | } | |
3062 | ||
7ad8096e | 3063 | mutex_lock(&hsotg->init_mutex); |
5b7d70c6 BD |
3064 | WARN_ON(hsotg->driver); |
3065 | ||
3066 | driver->driver.bus = NULL; | |
3067 | hsotg->driver = driver; | |
7d7b2292 | 3068 | hsotg->gadget.dev.of_node = hsotg->dev->of_node; |
5b7d70c6 BD |
3069 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; |
3070 | ||
d00b4142 RB |
3071 | clk_enable(hsotg->clk); |
3072 | ||
f65f0f10 LM |
3073 | ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), |
3074 | hsotg->supplies); | |
5b7d70c6 | 3075 | if (ret) { |
f65f0f10 | 3076 | dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret); |
5b7d70c6 BD |
3077 | goto err; |
3078 | } | |
3079 | ||
c816c47f | 3080 | s3c_hsotg_phy_enable(hsotg); |
f6c01592 GH |
3081 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
3082 | otg_set_peripheral(hsotg->uphy->otg, &hsotg->gadget); | |
c816c47f | 3083 | |
5b9451f8 MS |
3084 | spin_lock_irqsave(&hsotg->lock, flags); |
3085 | s3c_hsotg_init(hsotg); | |
643cc4de | 3086 | s3c_hsotg_core_init_disconnected(hsotg, false); |
dc6e69e6 | 3087 | hsotg->enabled = 0; |
5b9451f8 MS |
3088 | spin_unlock_irqrestore(&hsotg->lock, flags); |
3089 | ||
5b7d70c6 | 3090 | dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name); |
5b9451f8 | 3091 | |
7ad8096e MS |
3092 | mutex_unlock(&hsotg->init_mutex); |
3093 | ||
5b7d70c6 BD |
3094 | return 0; |
3095 | ||
3096 | err: | |
7ad8096e | 3097 | mutex_unlock(&hsotg->init_mutex); |
5b7d70c6 | 3098 | hsotg->driver = NULL; |
5b7d70c6 BD |
3099 | return ret; |
3100 | } | |
3101 | ||
8b9bc460 LM |
3102 | /** |
3103 | * s3c_hsotg_udc_stop - stop the udc | |
3104 | * @gadget: The usb gadget state | |
3105 | * @driver: The usb gadget driver | |
3106 | * | |
3107 | * Stop udc hw block and stay tunned for future transmissions | |
3108 | */ | |
22835b80 | 3109 | static int s3c_hsotg_udc_stop(struct usb_gadget *gadget) |
5b7d70c6 | 3110 | { |
941fcce4 | 3111 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
2b19a52c | 3112 | unsigned long flags = 0; |
5b7d70c6 BD |
3113 | int ep; |
3114 | ||
3115 | if (!hsotg) | |
3116 | return -ENODEV; | |
3117 | ||
7ad8096e MS |
3118 | mutex_lock(&hsotg->init_mutex); |
3119 | ||
5b7d70c6 | 3120 | /* all endpoints should be shutdown */ |
c6f5c050 MYK |
3121 | for (ep = 1; ep < hsotg->num_of_eps; ep++) { |
3122 | if (hsotg->eps_in[ep]) | |
3123 | s3c_hsotg_ep_disable(&hsotg->eps_in[ep]->ep); | |
3124 | if (hsotg->eps_out[ep]) | |
3125 | s3c_hsotg_ep_disable(&hsotg->eps_out[ep]->ep); | |
3126 | } | |
5b7d70c6 | 3127 | |
2b19a52c LM |
3128 | spin_lock_irqsave(&hsotg->lock, flags); |
3129 | ||
32805c35 | 3130 | hsotg->driver = NULL; |
5b7d70c6 | 3131 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; |
dc6e69e6 | 3132 | hsotg->enabled = 0; |
5b7d70c6 | 3133 | |
2b19a52c LM |
3134 | spin_unlock_irqrestore(&hsotg->lock, flags); |
3135 | ||
f6c01592 GH |
3136 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
3137 | otg_set_peripheral(hsotg->uphy->otg, NULL); | |
c816c47f MS |
3138 | s3c_hsotg_phy_disable(hsotg); |
3139 | ||
c8c10253 | 3140 | regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies); |
5b7d70c6 | 3141 | |
d00b4142 RB |
3142 | clk_disable(hsotg->clk); |
3143 | ||
7ad8096e MS |
3144 | mutex_unlock(&hsotg->init_mutex); |
3145 | ||
5b7d70c6 BD |
3146 | return 0; |
3147 | } | |
5b7d70c6 | 3148 | |
8b9bc460 LM |
3149 | /** |
3150 | * s3c_hsotg_gadget_getframe - read the frame number | |
3151 | * @gadget: The usb gadget state | |
3152 | * | |
3153 | * Read the {micro} frame number | |
3154 | */ | |
5b7d70c6 BD |
3155 | static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget) |
3156 | { | |
3157 | return s3c_hsotg_read_frameno(to_hsotg(gadget)); | |
3158 | } | |
3159 | ||
a188b689 LM |
3160 | /** |
3161 | * s3c_hsotg_pullup - connect/disconnect the USB PHY | |
3162 | * @gadget: The usb gadget state | |
3163 | * @is_on: Current state of the USB PHY | |
3164 | * | |
3165 | * Connect/Disconnect the USB PHY pullup | |
3166 | */ | |
3167 | static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on) | |
3168 | { | |
941fcce4 | 3169 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
a188b689 LM |
3170 | unsigned long flags = 0; |
3171 | ||
d784f1e5 | 3172 | dev_dbg(hsotg->dev, "%s: is_on: %d\n", __func__, is_on); |
a188b689 | 3173 | |
7ad8096e | 3174 | mutex_lock(&hsotg->init_mutex); |
a188b689 LM |
3175 | spin_lock_irqsave(&hsotg->lock, flags); |
3176 | if (is_on) { | |
d00b4142 | 3177 | clk_enable(hsotg->clk); |
dc6e69e6 | 3178 | hsotg->enabled = 1; |
b4c2378d | 3179 | s3c_hsotg_core_init_disconnected(hsotg, false); |
ad38dc5d | 3180 | s3c_hsotg_core_connect(hsotg); |
a188b689 | 3181 | } else { |
5b9451f8 | 3182 | s3c_hsotg_core_disconnect(hsotg); |
6d13673e | 3183 | s3c_hsotg_disconnect(hsotg); |
dc6e69e6 | 3184 | hsotg->enabled = 0; |
d00b4142 | 3185 | clk_disable(hsotg->clk); |
a188b689 LM |
3186 | } |
3187 | ||
3188 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; | |
3189 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
7ad8096e | 3190 | mutex_unlock(&hsotg->init_mutex); |
a188b689 LM |
3191 | |
3192 | return 0; | |
3193 | } | |
3194 | ||
83d98223 GH |
3195 | static int s3c_hsotg_vbus_session(struct usb_gadget *gadget, int is_active) |
3196 | { | |
3197 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); | |
3198 | unsigned long flags; | |
3199 | ||
3200 | dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active); | |
3201 | spin_lock_irqsave(&hsotg->lock, flags); | |
3202 | ||
3203 | if (is_active) { | |
18b2b37c GH |
3204 | /* |
3205 | * If controller is hibernated, it must exit from hibernation | |
3206 | * before being initialized | |
3207 | */ | |
3208 | if (hsotg->lx_state == DWC2_L2) { | |
3209 | dwc2_exit_hibernation(hsotg, false); | |
3210 | hsotg->lx_state = DWC2_L0; | |
3211 | } | |
83d98223 GH |
3212 | /* Kill any ep0 requests as controller will be reinitialized */ |
3213 | kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET); | |
643cc4de | 3214 | s3c_hsotg_core_init_disconnected(hsotg, false); |
83d98223 GH |
3215 | if (hsotg->enabled) |
3216 | s3c_hsotg_core_connect(hsotg); | |
3217 | } else { | |
3218 | s3c_hsotg_core_disconnect(hsotg); | |
3219 | s3c_hsotg_disconnect(hsotg); | |
3220 | } | |
3221 | ||
3222 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3223 | return 0; | |
3224 | } | |
3225 | ||
596d696a GH |
3226 | /** |
3227 | * s3c_hsotg_vbus_draw - report bMaxPower field | |
3228 | * @gadget: The usb gadget state | |
3229 | * @mA: Amount of current | |
3230 | * | |
3231 | * Report how much power the device may consume to the phy. | |
3232 | */ | |
3233 | static int s3c_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned mA) | |
3234 | { | |
3235 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); | |
3236 | ||
3237 | if (IS_ERR_OR_NULL(hsotg->uphy)) | |
3238 | return -ENOTSUPP; | |
3239 | return usb_phy_set_power(hsotg->uphy, mA); | |
3240 | } | |
3241 | ||
eeef4587 | 3242 | static const struct usb_gadget_ops s3c_hsotg_gadget_ops = { |
5b7d70c6 | 3243 | .get_frame = s3c_hsotg_gadget_getframe, |
f65f0f10 LM |
3244 | .udc_start = s3c_hsotg_udc_start, |
3245 | .udc_stop = s3c_hsotg_udc_stop, | |
a188b689 | 3246 | .pullup = s3c_hsotg_pullup, |
83d98223 | 3247 | .vbus_session = s3c_hsotg_vbus_session, |
596d696a | 3248 | .vbus_draw = s3c_hsotg_vbus_draw, |
5b7d70c6 BD |
3249 | }; |
3250 | ||
3251 | /** | |
3252 | * s3c_hsotg_initep - initialise a single endpoint | |
3253 | * @hsotg: The device state. | |
3254 | * @hs_ep: The endpoint to be initialised. | |
3255 | * @epnum: The endpoint number | |
3256 | * | |
3257 | * Initialise the given endpoint (as part of the probe and device state | |
3258 | * creation) to give to the gadget driver. Setup the endpoint name, any | |
3259 | * direction information and other state that may be required. | |
3260 | */ | |
941fcce4 | 3261 | static void s3c_hsotg_initep(struct dwc2_hsotg *hsotg, |
5b7d70c6 | 3262 | struct s3c_hsotg_ep *hs_ep, |
c6f5c050 MYK |
3263 | int epnum, |
3264 | bool dir_in) | |
5b7d70c6 | 3265 | { |
5b7d70c6 BD |
3266 | char *dir; |
3267 | ||
3268 | if (epnum == 0) | |
3269 | dir = ""; | |
c6f5c050 | 3270 | else if (dir_in) |
5b7d70c6 | 3271 | dir = "in"; |
c6f5c050 MYK |
3272 | else |
3273 | dir = "out"; | |
5b7d70c6 | 3274 | |
c6f5c050 | 3275 | hs_ep->dir_in = dir_in; |
5b7d70c6 BD |
3276 | hs_ep->index = epnum; |
3277 | ||
3278 | snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir); | |
3279 | ||
3280 | INIT_LIST_HEAD(&hs_ep->queue); | |
3281 | INIT_LIST_HEAD(&hs_ep->ep.ep_list); | |
3282 | ||
5b7d70c6 BD |
3283 | /* add to the list of endpoints known by the gadget driver */ |
3284 | if (epnum) | |
3285 | list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list); | |
3286 | ||
3287 | hs_ep->parent = hsotg; | |
3288 | hs_ep->ep.name = hs_ep->name; | |
e117e742 | 3289 | usb_ep_set_maxpacket_limit(&hs_ep->ep, epnum ? 1024 : EP0_MPS_LIMIT); |
5b7d70c6 BD |
3290 | hs_ep->ep.ops = &s3c_hsotg_ep_ops; |
3291 | ||
8b9bc460 LM |
3292 | /* |
3293 | * if we're using dma, we need to set the next-endpoint pointer | |
5b7d70c6 BD |
3294 | * to be something valid. |
3295 | */ | |
3296 | ||
3297 | if (using_dma(hsotg)) { | |
47a1685f | 3298 | u32 next = DXEPCTL_NEXTEP((epnum + 1) % 15); |
c6f5c050 MYK |
3299 | if (dir_in) |
3300 | writel(next, hsotg->regs + DIEPCTL(epnum)); | |
3301 | else | |
3302 | writel(next, hsotg->regs + DOEPCTL(epnum)); | |
5b7d70c6 BD |
3303 | } |
3304 | } | |
3305 | ||
b3f489b2 LM |
3306 | /** |
3307 | * s3c_hsotg_hw_cfg - read HW configuration registers | |
3308 | * @param: The device state | |
3309 | * | |
3310 | * Read the USB core HW configuration registers | |
3311 | */ | |
c6f5c050 | 3312 | static int s3c_hsotg_hw_cfg(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 3313 | { |
c6f5c050 MYK |
3314 | u32 cfg; |
3315 | u32 ep_type; | |
3316 | u32 i; | |
3317 | ||
b3f489b2 | 3318 | /* check hardware configuration */ |
5b7d70c6 | 3319 | |
c6f5c050 | 3320 | cfg = readl(hsotg->regs + GHWCFG2); |
f889f23d | 3321 | hsotg->num_of_eps = (cfg >> GHWCFG2_NUM_DEV_EP_SHIFT) & 0xF; |
c6f5c050 MYK |
3322 | /* Add ep0 */ |
3323 | hsotg->num_of_eps++; | |
10aebc77 | 3324 | |
c6f5c050 MYK |
3325 | hsotg->eps_in[0] = devm_kzalloc(hsotg->dev, sizeof(struct s3c_hsotg_ep), |
3326 | GFP_KERNEL); | |
3327 | if (!hsotg->eps_in[0]) | |
3328 | return -ENOMEM; | |
3329 | /* Same s3c_hsotg_ep is used in both directions for ep0 */ | |
3330 | hsotg->eps_out[0] = hsotg->eps_in[0]; | |
3331 | ||
3332 | cfg = readl(hsotg->regs + GHWCFG1); | |
251a17f5 | 3333 | for (i = 1, cfg >>= 2; i < hsotg->num_of_eps; i++, cfg >>= 2) { |
c6f5c050 MYK |
3334 | ep_type = cfg & 3; |
3335 | /* Direction in or both */ | |
3336 | if (!(ep_type & 2)) { | |
3337 | hsotg->eps_in[i] = devm_kzalloc(hsotg->dev, | |
3338 | sizeof(struct s3c_hsotg_ep), GFP_KERNEL); | |
3339 | if (!hsotg->eps_in[i]) | |
3340 | return -ENOMEM; | |
3341 | } | |
3342 | /* Direction out or both */ | |
3343 | if (!(ep_type & 1)) { | |
3344 | hsotg->eps_out[i] = devm_kzalloc(hsotg->dev, | |
3345 | sizeof(struct s3c_hsotg_ep), GFP_KERNEL); | |
3346 | if (!hsotg->eps_out[i]) | |
3347 | return -ENOMEM; | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | cfg = readl(hsotg->regs + GHWCFG3); | |
f889f23d | 3352 | hsotg->fifo_mem = (cfg >> GHWCFG3_DFIFO_DEPTH_SHIFT); |
10aebc77 | 3353 | |
c6f5c050 | 3354 | cfg = readl(hsotg->regs + GHWCFG4); |
f889f23d | 3355 | hsotg->dedicated_fifos = (cfg >> GHWCFG4_DED_FIFO_SHIFT) & 1; |
10aebc77 | 3356 | |
cff9eb75 MS |
3357 | dev_info(hsotg->dev, "EPs: %d, %s fifos, %d entries in SPRAM\n", |
3358 | hsotg->num_of_eps, | |
3359 | hsotg->dedicated_fifos ? "dedicated" : "shared", | |
3360 | hsotg->fifo_mem); | |
c6f5c050 | 3361 | return 0; |
5b7d70c6 BD |
3362 | } |
3363 | ||
8b9bc460 LM |
3364 | /** |
3365 | * s3c_hsotg_dump - dump state of the udc | |
3366 | * @param: The device state | |
3367 | */ | |
941fcce4 | 3368 | static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 3369 | { |
83a01804 | 3370 | #ifdef DEBUG |
5b7d70c6 BD |
3371 | struct device *dev = hsotg->dev; |
3372 | void __iomem *regs = hsotg->regs; | |
3373 | u32 val; | |
3374 | int idx; | |
3375 | ||
3376 | dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n", | |
94cb8fd6 LM |
3377 | readl(regs + DCFG), readl(regs + DCTL), |
3378 | readl(regs + DIEPMSK)); | |
5b7d70c6 | 3379 | |
f889f23d MYK |
3380 | dev_info(dev, "GAHBCFG=0x%08x, GHWCFG1=0x%08x\n", |
3381 | readl(regs + GAHBCFG), readl(regs + GHWCFG1)); | |
5b7d70c6 BD |
3382 | |
3383 | dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
94cb8fd6 | 3384 | readl(regs + GRXFSIZ), readl(regs + GNPTXFSIZ)); |
5b7d70c6 BD |
3385 | |
3386 | /* show periodic fifo settings */ | |
3387 | ||
364f8e93 | 3388 | for (idx = 1; idx < hsotg->num_of_eps; idx++) { |
47a1685f | 3389 | val = readl(regs + DPTXFSIZN(idx)); |
5b7d70c6 | 3390 | dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx, |
47a1685f DN |
3391 | val >> FIFOSIZE_DEPTH_SHIFT, |
3392 | val & FIFOSIZE_STARTADDR_MASK); | |
5b7d70c6 BD |
3393 | } |
3394 | ||
364f8e93 | 3395 | for (idx = 0; idx < hsotg->num_of_eps; idx++) { |
5b7d70c6 BD |
3396 | dev_info(dev, |
3397 | "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx, | |
94cb8fd6 LM |
3398 | readl(regs + DIEPCTL(idx)), |
3399 | readl(regs + DIEPTSIZ(idx)), | |
3400 | readl(regs + DIEPDMA(idx))); | |
5b7d70c6 | 3401 | |
94cb8fd6 | 3402 | val = readl(regs + DOEPCTL(idx)); |
5b7d70c6 BD |
3403 | dev_info(dev, |
3404 | "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", | |
94cb8fd6 LM |
3405 | idx, readl(regs + DOEPCTL(idx)), |
3406 | readl(regs + DOEPTSIZ(idx)), | |
3407 | readl(regs + DOEPDMA(idx))); | |
5b7d70c6 BD |
3408 | |
3409 | } | |
3410 | ||
3411 | dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n", | |
94cb8fd6 | 3412 | readl(regs + DVBUSDIS), readl(regs + DVBUSPULSE)); |
83a01804 | 3413 | #endif |
5b7d70c6 BD |
3414 | } |
3415 | ||
edd74be8 GH |
3416 | #ifdef CONFIG_OF |
3417 | static void s3c_hsotg_of_probe(struct dwc2_hsotg *hsotg) | |
3418 | { | |
3419 | struct device_node *np = hsotg->dev->of_node; | |
0a176279 GH |
3420 | u32 len = 0; |
3421 | u32 i = 0; | |
edd74be8 GH |
3422 | |
3423 | /* Enable dma if requested in device tree */ | |
3424 | hsotg->g_using_dma = of_property_read_bool(np, "g-use-dma"); | |
0a176279 GH |
3425 | |
3426 | /* | |
3427 | * Register TX periodic fifo size per endpoint. | |
3428 | * EP0 is excluded since it has no fifo configuration. | |
3429 | */ | |
3430 | if (!of_find_property(np, "g-tx-fifo-size", &len)) | |
3431 | goto rx_fifo; | |
3432 | ||
3433 | len /= sizeof(u32); | |
3434 | ||
3435 | /* Read tx fifo sizes other than ep0 */ | |
3436 | if (of_property_read_u32_array(np, "g-tx-fifo-size", | |
3437 | &hsotg->g_tx_fifo_sz[1], len)) | |
3438 | goto rx_fifo; | |
3439 | ||
3440 | /* Add ep0 */ | |
3441 | len++; | |
3442 | ||
3443 | /* Make remaining TX fifos unavailable */ | |
3444 | if (len < MAX_EPS_CHANNELS) { | |
3445 | for (i = len; i < MAX_EPS_CHANNELS; i++) | |
3446 | hsotg->g_tx_fifo_sz[i] = 0; | |
3447 | } | |
3448 | ||
3449 | rx_fifo: | |
3450 | /* Register RX fifo size */ | |
3451 | of_property_read_u32(np, "g-rx-fifo-size", &hsotg->g_rx_fifo_sz); | |
3452 | ||
3453 | /* Register NPTX fifo size */ | |
3454 | of_property_read_u32(np, "g-np-tx-fifo-size", | |
3455 | &hsotg->g_np_g_tx_fifo_sz); | |
edd74be8 GH |
3456 | } |
3457 | #else | |
3458 | static inline void s3c_hsotg_of_probe(struct dwc2_hsotg *hsotg) { } | |
3459 | #endif | |
3460 | ||
8b9bc460 | 3461 | /** |
117777b2 DN |
3462 | * dwc2_gadget_init - init function for gadget |
3463 | * @dwc2: The data structure for the DWC2 driver. | |
3464 | * @irq: The IRQ number for the controller. | |
8b9bc460 | 3465 | */ |
117777b2 | 3466 | int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq) |
5b7d70c6 | 3467 | { |
117777b2 DN |
3468 | struct device *dev = hsotg->dev; |
3469 | struct s3c_hsotg_plat *plat = dev->platform_data; | |
5b7d70c6 BD |
3470 | int epnum; |
3471 | int ret; | |
fc9a731e | 3472 | int i; |
0a176279 | 3473 | u32 p_tx_fifo[] = DWC2_G_P_LEGACY_TX_FIFO_SIZE; |
5b7d70c6 | 3474 | |
1b59fc7e KD |
3475 | /* Set default UTMI width */ |
3476 | hsotg->phyif = GUSBCFG_PHYIF16; | |
3477 | ||
edd74be8 GH |
3478 | s3c_hsotg_of_probe(hsotg); |
3479 | ||
0a176279 GH |
3480 | /* Initialize to legacy fifo configuration values */ |
3481 | hsotg->g_rx_fifo_sz = 2048; | |
3482 | hsotg->g_np_g_tx_fifo_sz = 1024; | |
3483 | memcpy(&hsotg->g_tx_fifo_sz[1], p_tx_fifo, sizeof(p_tx_fifo)); | |
3484 | /* Device tree specific probe */ | |
3485 | s3c_hsotg_of_probe(hsotg); | |
3486 | /* Dump fifo information */ | |
3487 | dev_dbg(dev, "NonPeriodic TXFIFO size: %d\n", | |
3488 | hsotg->g_np_g_tx_fifo_sz); | |
3489 | dev_dbg(dev, "RXFIFO size: %d\n", hsotg->g_rx_fifo_sz); | |
3490 | for (i = 0; i < MAX_EPS_CHANNELS; i++) | |
3491 | dev_dbg(dev, "Periodic TXFIFO%2d size: %d\n", i, | |
3492 | hsotg->g_tx_fifo_sz[i]); | |
74084844 | 3493 | /* |
135b3c43 YL |
3494 | * If platform probe couldn't find a generic PHY or an old style |
3495 | * USB PHY, fall back to pdata | |
74084844 | 3496 | */ |
135b3c43 YL |
3497 | if (IS_ERR_OR_NULL(hsotg->phy) && IS_ERR_OR_NULL(hsotg->uphy)) { |
3498 | plat = dev_get_platdata(dev); | |
3499 | if (!plat) { | |
3500 | dev_err(dev, | |
3501 | "no platform data or transceiver defined\n"); | |
3502 | return -EPROBE_DEFER; | |
3503 | } | |
3504 | hsotg->plat = plat; | |
3505 | } else if (hsotg->phy) { | |
1b59fc7e KD |
3506 | /* |
3507 | * If using the generic PHY framework, check if the PHY bus | |
3508 | * width is 8-bit and set the phyif appropriately. | |
3509 | */ | |
135b3c43 | 3510 | if (phy_get_bus_width(hsotg->phy) == 8) |
1b59fc7e KD |
3511 | hsotg->phyif = GUSBCFG_PHYIF8; |
3512 | } | |
b2e587db | 3513 | |
117777b2 | 3514 | hsotg->clk = devm_clk_get(dev, "otg"); |
31ee04de | 3515 | if (IS_ERR(hsotg->clk)) { |
8d736d8a | 3516 | hsotg->clk = NULL; |
f415fbd1 | 3517 | dev_dbg(dev, "cannot get otg clock\n"); |
5b7d70c6 BD |
3518 | } |
3519 | ||
d327ab5b | 3520 | hsotg->gadget.max_speed = USB_SPEED_HIGH; |
5b7d70c6 BD |
3521 | hsotg->gadget.ops = &s3c_hsotg_gadget_ops; |
3522 | hsotg->gadget.name = dev_name(dev); | |
097ee662 GH |
3523 | if (hsotg->dr_mode == USB_DR_MODE_OTG) |
3524 | hsotg->gadget.is_otg = 1; | |
5b7d70c6 | 3525 | |
5b7d70c6 BD |
3526 | /* reset the system */ |
3527 | ||
f415fbd1 DN |
3528 | ret = clk_prepare_enable(hsotg->clk); |
3529 | if (ret) { | |
3530 | dev_err(dev, "failed to enable otg clk\n"); | |
3531 | goto err_clk; | |
3532 | } | |
3533 | ||
31ee04de | 3534 | |
fc9a731e LM |
3535 | /* regulators */ |
3536 | ||
3537 | for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++) | |
3538 | hsotg->supplies[i].supply = s3c_hsotg_supply_names[i]; | |
3539 | ||
cd76213e | 3540 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies), |
fc9a731e LM |
3541 | hsotg->supplies); |
3542 | if (ret) { | |
3543 | dev_err(dev, "failed to request supplies: %d\n", ret); | |
338edabc | 3544 | goto err_clk; |
fc9a731e LM |
3545 | } |
3546 | ||
3547 | ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), | |
3548 | hsotg->supplies); | |
3549 | ||
3550 | if (ret) { | |
941fcce4 | 3551 | dev_err(dev, "failed to enable supplies: %d\n", ret); |
c139ec27 | 3552 | goto err_clk; |
fc9a731e LM |
3553 | } |
3554 | ||
41188786 LM |
3555 | /* usb phy enable */ |
3556 | s3c_hsotg_phy_enable(hsotg); | |
5b7d70c6 | 3557 | |
1b7a66b4 GH |
3558 | /* |
3559 | * Force Device mode before initialization. | |
3560 | * This allows correctly configuring fifo for device mode. | |
3561 | */ | |
3562 | __bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEHOSTMODE); | |
3563 | __orr32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE); | |
3564 | ||
3565 | /* | |
3566 | * According to Synopsys databook, this sleep is needed for the force | |
3567 | * device mode to take effect. | |
3568 | */ | |
3569 | msleep(25); | |
3570 | ||
5b7d70c6 | 3571 | s3c_hsotg_corereset(hsotg); |
c6f5c050 MYK |
3572 | ret = s3c_hsotg_hw_cfg(hsotg); |
3573 | if (ret) { | |
3574 | dev_err(hsotg->dev, "Hardware configuration failed: %d\n", ret); | |
3575 | goto err_clk; | |
3576 | } | |
3577 | ||
cff9eb75 | 3578 | s3c_hsotg_init(hsotg); |
b3f489b2 | 3579 | |
1b7a66b4 GH |
3580 | /* Switch back to default configuration */ |
3581 | __bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE); | |
3582 | ||
3f95001d MYK |
3583 | hsotg->ctrl_buff = devm_kzalloc(hsotg->dev, |
3584 | DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); | |
3585 | if (!hsotg->ctrl_buff) { | |
3586 | dev_err(dev, "failed to allocate ctrl request buff\n"); | |
3587 | ret = -ENOMEM; | |
3588 | goto err_supplies; | |
3589 | } | |
3590 | ||
3591 | hsotg->ep0_buff = devm_kzalloc(hsotg->dev, | |
3592 | DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); | |
3593 | if (!hsotg->ep0_buff) { | |
3594 | dev_err(dev, "failed to allocate ctrl reply buff\n"); | |
3595 | ret = -ENOMEM; | |
3596 | goto err_supplies; | |
3597 | } | |
3598 | ||
db8178c3 DN |
3599 | ret = devm_request_irq(hsotg->dev, irq, s3c_hsotg_irq, IRQF_SHARED, |
3600 | dev_name(hsotg->dev), hsotg); | |
eb3c56c5 MS |
3601 | if (ret < 0) { |
3602 | s3c_hsotg_phy_disable(hsotg); | |
3603 | clk_disable_unprepare(hsotg->clk); | |
3604 | regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), | |
3605 | hsotg->supplies); | |
db8178c3 | 3606 | dev_err(dev, "cannot claim IRQ for gadget\n"); |
c139ec27 | 3607 | goto err_supplies; |
eb3c56c5 MS |
3608 | } |
3609 | ||
b3f489b2 LM |
3610 | /* hsotg->num_of_eps holds number of EPs other than ep0 */ |
3611 | ||
3612 | if (hsotg->num_of_eps == 0) { | |
3613 | dev_err(dev, "wrong number of EPs (zero)\n"); | |
dfdda5a0 | 3614 | ret = -EINVAL; |
b3f489b2 LM |
3615 | goto err_supplies; |
3616 | } | |
3617 | ||
b3f489b2 LM |
3618 | /* setup endpoint information */ |
3619 | ||
3620 | INIT_LIST_HEAD(&hsotg->gadget.ep_list); | |
c6f5c050 | 3621 | hsotg->gadget.ep0 = &hsotg->eps_out[0]->ep; |
b3f489b2 LM |
3622 | |
3623 | /* allocate EP0 request */ | |
3624 | ||
c6f5c050 | 3625 | hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps_out[0]->ep, |
b3f489b2 LM |
3626 | GFP_KERNEL); |
3627 | if (!hsotg->ctrl_req) { | |
3628 | dev_err(dev, "failed to allocate ctrl req\n"); | |
dfdda5a0 | 3629 | ret = -ENOMEM; |
c6f5c050 | 3630 | goto err_supplies; |
b3f489b2 | 3631 | } |
5b7d70c6 BD |
3632 | |
3633 | /* initialise the endpoints now the core has been initialised */ | |
c6f5c050 MYK |
3634 | for (epnum = 0; epnum < hsotg->num_of_eps; epnum++) { |
3635 | if (hsotg->eps_in[epnum]) | |
3636 | s3c_hsotg_initep(hsotg, hsotg->eps_in[epnum], | |
3637 | epnum, 1); | |
3638 | if (hsotg->eps_out[epnum]) | |
3639 | s3c_hsotg_initep(hsotg, hsotg->eps_out[epnum], | |
3640 | epnum, 0); | |
3641 | } | |
5b7d70c6 | 3642 | |
f65f0f10 | 3643 | /* disable power and clock */ |
3a8146aa | 3644 | s3c_hsotg_phy_disable(hsotg); |
f65f0f10 LM |
3645 | |
3646 | ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), | |
3647 | hsotg->supplies); | |
3648 | if (ret) { | |
117777b2 | 3649 | dev_err(dev, "failed to disable supplies: %d\n", ret); |
c6f5c050 | 3650 | goto err_supplies; |
f65f0f10 LM |
3651 | } |
3652 | ||
117777b2 | 3653 | ret = usb_add_gadget_udc(dev, &hsotg->gadget); |
0f91349b | 3654 | if (ret) |
c6f5c050 | 3655 | goto err_supplies; |
0f91349b | 3656 | |
5b7d70c6 BD |
3657 | s3c_hsotg_dump(hsotg); |
3658 | ||
5b7d70c6 BD |
3659 | return 0; |
3660 | ||
fc9a731e | 3661 | err_supplies: |
41188786 | 3662 | s3c_hsotg_phy_disable(hsotg); |
31ee04de | 3663 | err_clk: |
1d144c67 | 3664 | clk_disable_unprepare(hsotg->clk); |
338edabc | 3665 | |
5b7d70c6 BD |
3666 | return ret; |
3667 | } | |
3668 | ||
8b9bc460 LM |
3669 | /** |
3670 | * s3c_hsotg_remove - remove function for hsotg driver | |
3671 | * @pdev: The platform information for the driver | |
3672 | */ | |
117777b2 | 3673 | int s3c_hsotg_remove(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 3674 | { |
0f91349b | 3675 | usb_del_gadget_udc(&hsotg->gadget); |
04b4a0fc | 3676 | clk_disable_unprepare(hsotg->clk); |
31ee04de | 3677 | |
5b7d70c6 BD |
3678 | return 0; |
3679 | } | |
3680 | ||
117777b2 | 3681 | int s3c_hsotg_suspend(struct dwc2_hsotg *hsotg) |
b83e333a | 3682 | { |
b83e333a MS |
3683 | unsigned long flags; |
3684 | int ret = 0; | |
3685 | ||
9e779778 GH |
3686 | if (hsotg->lx_state != DWC2_L0) |
3687 | return ret; | |
3688 | ||
7ad8096e MS |
3689 | mutex_lock(&hsotg->init_mutex); |
3690 | ||
dc6e69e6 MS |
3691 | if (hsotg->driver) { |
3692 | int ep; | |
3693 | ||
b83e333a MS |
3694 | dev_info(hsotg->dev, "suspending usb gadget %s\n", |
3695 | hsotg->driver->driver.name); | |
3696 | ||
dc6e69e6 MS |
3697 | spin_lock_irqsave(&hsotg->lock, flags); |
3698 | if (hsotg->enabled) | |
3699 | s3c_hsotg_core_disconnect(hsotg); | |
3700 | s3c_hsotg_disconnect(hsotg); | |
3701 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; | |
3702 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
b83e333a | 3703 | |
dc6e69e6 | 3704 | s3c_hsotg_phy_disable(hsotg); |
b83e333a | 3705 | |
c6f5c050 MYK |
3706 | for (ep = 0; ep < hsotg->num_of_eps; ep++) { |
3707 | if (hsotg->eps_in[ep]) | |
3708 | s3c_hsotg_ep_disable(&hsotg->eps_in[ep]->ep); | |
3709 | if (hsotg->eps_out[ep]) | |
3710 | s3c_hsotg_ep_disable(&hsotg->eps_out[ep]->ep); | |
3711 | } | |
b83e333a MS |
3712 | |
3713 | ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), | |
3714 | hsotg->supplies); | |
d00b4142 | 3715 | clk_disable(hsotg->clk); |
b83e333a MS |
3716 | } |
3717 | ||
7ad8096e MS |
3718 | mutex_unlock(&hsotg->init_mutex); |
3719 | ||
b83e333a MS |
3720 | return ret; |
3721 | } | |
3722 | ||
117777b2 | 3723 | int s3c_hsotg_resume(struct dwc2_hsotg *hsotg) |
b83e333a | 3724 | { |
b83e333a MS |
3725 | unsigned long flags; |
3726 | int ret = 0; | |
3727 | ||
9e779778 GH |
3728 | if (hsotg->lx_state == DWC2_L2) |
3729 | return ret; | |
3730 | ||
7ad8096e MS |
3731 | mutex_lock(&hsotg->init_mutex); |
3732 | ||
b83e333a MS |
3733 | if (hsotg->driver) { |
3734 | dev_info(hsotg->dev, "resuming usb gadget %s\n", | |
3735 | hsotg->driver->driver.name); | |
d00b4142 RB |
3736 | |
3737 | clk_enable(hsotg->clk); | |
b83e333a | 3738 | ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), |
dc6e69e6 | 3739 | hsotg->supplies); |
b83e333a | 3740 | |
dc6e69e6 | 3741 | s3c_hsotg_phy_enable(hsotg); |
b83e333a | 3742 | |
dc6e69e6 | 3743 | spin_lock_irqsave(&hsotg->lock, flags); |
643cc4de | 3744 | s3c_hsotg_core_init_disconnected(hsotg, false); |
dc6e69e6 MS |
3745 | if (hsotg->enabled) |
3746 | s3c_hsotg_core_connect(hsotg); | |
3747 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
3748 | } | |
7ad8096e | 3749 | mutex_unlock(&hsotg->init_mutex); |
b83e333a MS |
3750 | |
3751 | return ret; | |
3752 | } |