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2a4f136f DA |
1 | /* |
2 | * driver/usb/gadget/imx_udc.c | |
3 | * | |
4 | * Copyright (C) 2005 Mike Lee(eemike@gmail.com) | |
5 | * Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/io.h> | |
26 | #include <linux/irq.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/dma-mapping.h> | |
29 | #include <linux/clk.h> | |
30 | #include <linux/delay.h> | |
31 | ||
32 | #include <linux/usb/ch9.h> | |
33 | #include <linux/usb/gadget.h> | |
34 | ||
35 | #include <mach/usb.h> | |
36 | #include <mach/hardware.h> | |
37 | ||
38 | #include "imx_udc.h" | |
39 | ||
40 | static const char driver_name[] = "imx_udc"; | |
41 | static const char ep0name[] = "ep0"; | |
42 | ||
43 | void ep0_chg_stat(const char *label, struct imx_udc_struct *imx_usb, | |
44 | enum ep0_state stat); | |
45 | ||
46 | /******************************************************************************* | |
47 | * IMX UDC hardware related functions | |
48 | ******************************************************************************* | |
49 | */ | |
50 | ||
51 | void imx_udc_enable(struct imx_udc_struct *imx_usb) | |
52 | { | |
53 | int temp = __raw_readl(imx_usb->base + USB_CTRL); | |
54 | __raw_writel(temp | CTRL_FE_ENA | CTRL_AFE_ENA, imx_usb->base + USB_CTRL); | |
55 | imx_usb->gadget.speed = USB_SPEED_FULL; | |
56 | } | |
57 | ||
58 | void imx_udc_disable(struct imx_udc_struct *imx_usb) | |
59 | { | |
60 | int temp = __raw_readl(imx_usb->base + USB_CTRL); | |
61 | ||
62 | __raw_writel(temp & ~(CTRL_FE_ENA | CTRL_AFE_ENA), | |
63 | imx_usb->base + USB_CTRL); | |
64 | ||
65 | ep0_chg_stat(__func__, imx_usb, EP0_IDLE); | |
66 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
67 | } | |
68 | ||
69 | void imx_udc_reset(struct imx_udc_struct *imx_usb) | |
70 | { | |
71 | int temp = __raw_readl(imx_usb->base + USB_ENAB); | |
72 | ||
73 | /* set RST bit */ | |
74 | __raw_writel(temp | ENAB_RST, imx_usb->base + USB_ENAB); | |
75 | ||
76 | /* wait RST bit to clear */ | |
77 | do {} while (__raw_readl(imx_usb->base + USB_ENAB) & ENAB_RST); | |
78 | ||
79 | /* wait CFG bit to assert */ | |
80 | do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG)); | |
81 | ||
82 | /* udc module is now ready */ | |
83 | } | |
84 | ||
85 | void imx_udc_config(struct imx_udc_struct *imx_usb) | |
86 | { | |
87 | u8 ep_conf[5]; | |
88 | u8 i, j, cfg; | |
89 | struct imx_ep_struct *imx_ep; | |
90 | ||
91 | /* wait CFG bit to assert */ | |
92 | do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG)); | |
93 | ||
94 | /* Download the endpoint buffer for endpoint 0. */ | |
95 | for (j = 0; j < 5; j++) { | |
96 | i = (j == 2 ? imx_usb->imx_ep[0].fifosize : 0x00); | |
97 | __raw_writeb(i, imx_usb->base + USB_DDAT); | |
98 | do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_BSY); | |
99 | } | |
100 | ||
101 | /* Download the endpoint buffers for endpoints 1-5. | |
102 | * We specify two configurations, one interface | |
103 | */ | |
104 | for (cfg = 1; cfg < 3; cfg++) { | |
105 | for (i = 1; i < IMX_USB_NB_EP; i++) { | |
106 | imx_ep = &imx_usb->imx_ep[i]; | |
107 | /* EP no | Config no */ | |
108 | ep_conf[0] = (i << 4) | (cfg << 2); | |
109 | /* Type | Direction */ | |
110 | ep_conf[1] = (imx_ep->bmAttributes << 3) | | |
111 | (EP_DIR(imx_ep) << 2); | |
112 | /* Max packet size */ | |
113 | ep_conf[2] = imx_ep->fifosize; | |
114 | /* TRXTYP */ | |
115 | ep_conf[3] = 0xC0; | |
116 | /* FIFO no */ | |
117 | ep_conf[4] = i; | |
118 | ||
119 | D_INI(imx_usb->dev, | |
120 | "<%s> ep%d_conf[%d]:" | |
121 | "[%02x-%02x-%02x-%02x-%02x]\n", | |
122 | __func__, i, cfg, | |
123 | ep_conf[0], ep_conf[1], ep_conf[2], | |
124 | ep_conf[3], ep_conf[4]); | |
125 | ||
126 | for (j = 0; j < 5; j++) { | |
127 | __raw_writeb(ep_conf[j], | |
128 | imx_usb->base + USB_DDAT); | |
129 | do {} while (__raw_readl(imx_usb->base + USB_DADR) | |
130 | & DADR_BSY); | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
135 | /* wait CFG bit to clear */ | |
136 | do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG); | |
137 | } | |
138 | ||
139 | void imx_udc_init_irq(struct imx_udc_struct *imx_usb) | |
140 | { | |
141 | int i; | |
142 | ||
143 | /* Mask and clear all irqs */ | |
144 | __raw_writel(0xFFFFFFFF, imx_usb->base + USB_MASK); | |
145 | __raw_writel(0xFFFFFFFF, imx_usb->base + USB_INTR); | |
146 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
147 | __raw_writel(0x1FF, imx_usb->base + USB_EP_MASK(i)); | |
148 | __raw_writel(0x1FF, imx_usb->base + USB_EP_INTR(i)); | |
149 | } | |
150 | ||
151 | /* Enable USB irqs */ | |
152 | __raw_writel(INTR_MSOF | INTR_FRAME_MATCH, imx_usb->base + USB_MASK); | |
153 | ||
154 | /* Enable EP0 irqs */ | |
155 | __raw_writel(0x1FF & ~(EPINTR_DEVREQ | EPINTR_MDEVREQ | EPINTR_EOT | |
156 | | EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL), | |
157 | imx_usb->base + USB_EP_MASK(0)); | |
158 | } | |
159 | ||
160 | void imx_udc_init_ep(struct imx_udc_struct *imx_usb) | |
161 | { | |
162 | int i, max, temp; | |
163 | struct imx_ep_struct *imx_ep; | |
164 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
165 | imx_ep = &imx_usb->imx_ep[i]; | |
166 | switch (imx_ep->fifosize) { | |
167 | case 8: | |
168 | max = 0; | |
169 | break; | |
170 | case 16: | |
171 | max = 1; | |
172 | break; | |
173 | case 32: | |
174 | max = 2; | |
175 | break; | |
176 | case 64: | |
177 | max = 3; | |
178 | break; | |
179 | default: | |
180 | max = 1; | |
181 | break; | |
182 | } | |
183 | temp = (EP_DIR(imx_ep) << 7) | (max << 5) | |
184 | | (imx_ep->bmAttributes << 3); | |
185 | __raw_writel(temp, imx_usb->base + USB_EP_STAT(i)); | |
186 | __raw_writel(temp | EPSTAT_FLUSH, imx_usb->base + USB_EP_STAT(i)); | |
187 | D_INI(imx_usb->dev, "<%s> ep%d_stat %08x\n", __func__, i, | |
188 | __raw_readl(imx_usb->base + USB_EP_STAT(i))); | |
189 | } | |
190 | } | |
191 | ||
192 | void imx_udc_init_fifo(struct imx_udc_struct *imx_usb) | |
193 | { | |
194 | int i, temp; | |
195 | struct imx_ep_struct *imx_ep; | |
196 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
197 | imx_ep = &imx_usb->imx_ep[i]; | |
198 | ||
199 | /* Fifo control */ | |
200 | temp = EP_DIR(imx_ep) ? 0x0B000000 : 0x0F000000; | |
201 | __raw_writel(temp, imx_usb->base + USB_EP_FCTRL(i)); | |
202 | D_INI(imx_usb->dev, "<%s> ep%d_fctrl %08x\n", __func__, i, | |
203 | __raw_readl(imx_usb->base + USB_EP_FCTRL(i))); | |
204 | ||
205 | /* Fifo alarm */ | |
206 | temp = (i ? imx_ep->fifosize / 2 : 0); | |
207 | __raw_writel(temp, imx_usb->base + USB_EP_FALRM(i)); | |
208 | D_INI(imx_usb->dev, "<%s> ep%d_falrm %08x\n", __func__, i, | |
209 | __raw_readl(imx_usb->base + USB_EP_FALRM(i))); | |
210 | } | |
211 | } | |
212 | ||
213 | static void imx_udc_init(struct imx_udc_struct *imx_usb) | |
214 | { | |
215 | /* Reset UDC */ | |
216 | imx_udc_reset(imx_usb); | |
217 | ||
218 | /* Download config to enpoint buffer */ | |
219 | imx_udc_config(imx_usb); | |
220 | ||
221 | /* Setup interrups */ | |
222 | imx_udc_init_irq(imx_usb); | |
223 | ||
224 | /* Setup endpoints */ | |
225 | imx_udc_init_ep(imx_usb); | |
226 | ||
227 | /* Setup fifos */ | |
228 | imx_udc_init_fifo(imx_usb); | |
229 | } | |
230 | ||
231 | void imx_ep_irq_enable(struct imx_ep_struct *imx_ep) | |
232 | { | |
233 | ||
234 | int i = EP_NO(imx_ep); | |
235 | ||
236 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
237 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i)); | |
238 | __raw_writel(0x1FF & ~(EPINTR_EOT | EPINTR_EOF), | |
239 | imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
240 | } | |
241 | ||
242 | void imx_ep_irq_disable(struct imx_ep_struct *imx_ep) | |
243 | { | |
244 | ||
245 | int i = EP_NO(imx_ep); | |
246 | ||
247 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
248 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i)); | |
249 | } | |
250 | ||
251 | int imx_ep_empty(struct imx_ep_struct *imx_ep) | |
252 | { | |
253 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
254 | ||
255 | return __raw_readl(imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep))) | |
256 | & FSTAT_EMPTY; | |
257 | } | |
258 | ||
259 | unsigned imx_fifo_bcount(struct imx_ep_struct *imx_ep) | |
260 | { | |
261 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
262 | ||
263 | return (__raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))) | |
264 | & EPSTAT_BCOUNT) >> 16; | |
265 | } | |
266 | ||
267 | void imx_flush(struct imx_ep_struct *imx_ep) | |
268 | { | |
269 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
270 | ||
271 | int temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
272 | __raw_writel(temp | EPSTAT_FLUSH, | |
273 | imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
274 | } | |
275 | ||
276 | void imx_ep_stall(struct imx_ep_struct *imx_ep) | |
277 | { | |
278 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
279 | int temp, i; | |
280 | ||
281 | D_ERR(imx_usb->dev, "<%s> Forced stall on %s\n", __func__, imx_ep->ep.name); | |
282 | ||
283 | imx_flush(imx_ep); | |
284 | ||
285 | /* Special care for ep0 */ | |
286 | if (EP_NO(imx_ep)) { | |
287 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
288 | __raw_writel(temp | CTRL_CMDOVER | CTRL_CMDERROR, imx_usb->base + USB_CTRL); | |
289 | do { } while (__raw_readl(imx_usb->base + USB_CTRL) & CTRL_CMDOVER); | |
290 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
291 | __raw_writel(temp & ~CTRL_CMDERROR, imx_usb->base + USB_CTRL); | |
292 | } | |
293 | else { | |
294 | temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
295 | __raw_writel(temp | EPSTAT_STALL, | |
296 | imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
297 | ||
298 | for (i = 0; i < 100; i ++) { | |
299 | temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
0df24792 | 300 | if (!(temp & EPSTAT_STALL)) |
2a4f136f DA |
301 | break; |
302 | udelay(20); | |
303 | } | |
304 | if (i == 50) | |
305 | D_ERR(imx_usb->dev, "<%s> Non finished stall on %s\n", | |
306 | __func__, imx_ep->ep.name); | |
307 | } | |
308 | } | |
309 | ||
310 | static int imx_udc_get_frame(struct usb_gadget *_gadget) | |
311 | { | |
312 | struct imx_udc_struct *imx_usb = container_of(_gadget, | |
313 | struct imx_udc_struct, gadget); | |
314 | ||
315 | return __raw_readl(imx_usb->base + USB_FRAME) & 0x7FF; | |
316 | } | |
317 | ||
318 | static int imx_udc_wakeup(struct usb_gadget *_gadget) | |
319 | { | |
320 | return 0; | |
321 | } | |
322 | ||
323 | /******************************************************************************* | |
324 | * USB request control functions | |
325 | ******************************************************************************* | |
326 | */ | |
327 | ||
328 | static void ep_add_request(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
329 | { | |
330 | if (unlikely(!req)) | |
331 | return; | |
332 | ||
333 | req->in_use = 1; | |
334 | list_add_tail(&req->queue, &imx_ep->queue); | |
335 | } | |
336 | ||
337 | static void ep_del_request(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
338 | { | |
339 | if (unlikely(!req)) | |
340 | return; | |
341 | ||
342 | list_del_init(&req->queue); | |
343 | req->in_use = 0; | |
344 | } | |
345 | ||
346 | static void done(struct imx_ep_struct *imx_ep, struct imx_request *req, int status) | |
347 | { | |
348 | ep_del_request(imx_ep, req); | |
349 | ||
350 | if (likely(req->req.status == -EINPROGRESS)) | |
351 | req->req.status = status; | |
352 | else | |
353 | status = req->req.status; | |
354 | ||
355 | if (status && status != -ESHUTDOWN) | |
356 | D_ERR(imx_ep->imx_usb->dev, | |
357 | "<%s> complete %s req %p stat %d len %u/%u\n", __func__, | |
358 | imx_ep->ep.name, &req->req, status, | |
359 | req->req.actual, req->req.length); | |
360 | ||
361 | req->req.complete(&imx_ep->ep, &req->req); | |
362 | } | |
363 | ||
364 | static void nuke(struct imx_ep_struct *imx_ep, int status) | |
365 | { | |
366 | struct imx_request *req; | |
367 | ||
368 | while (!list_empty(&imx_ep->queue)) { | |
369 | req = list_entry(imx_ep->queue.next, struct imx_request, queue); | |
370 | done(imx_ep, req, status); | |
371 | } | |
372 | } | |
373 | ||
374 | /******************************************************************************* | |
375 | * Data tansfer over USB functions | |
376 | ******************************************************************************* | |
377 | */ | |
378 | static int read_packet(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
379 | { | |
380 | u8 *buf; | |
381 | int bytes_ep, bufferspace, count, i; | |
382 | ||
383 | bytes_ep = imx_fifo_bcount(imx_ep); | |
384 | bufferspace = req->req.length - req->req.actual; | |
385 | ||
386 | buf = req->req.buf + req->req.actual; | |
387 | prefetchw(buf); | |
388 | ||
389 | if (unlikely(imx_ep_empty(imx_ep))) | |
390 | count = 0; /* zlp */ | |
391 | else | |
392 | count = min(bytes_ep, bufferspace); | |
393 | ||
394 | for (i = count; i > 0; i--) | |
395 | *buf++ = __raw_readb(imx_ep->imx_usb->base | |
396 | + USB_EP_FDAT0(EP_NO(imx_ep))); | |
397 | req->req.actual += count; | |
398 | ||
399 | return count; | |
400 | } | |
401 | ||
402 | static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
403 | { | |
404 | u8 *buf; | |
405 | int length, count, temp; | |
406 | ||
407 | buf = req->req.buf + req->req.actual; | |
408 | prefetch(buf); | |
409 | ||
410 | length = min(req->req.length - req->req.actual, (u32)imx_ep->fifosize); | |
411 | ||
412 | if (imx_fifo_bcount(imx_ep) + length > imx_ep->fifosize) { | |
413 | D_TRX(imx_ep->imx_usb->dev, "<%s> packet overfill %s fifo\n", | |
414 | __func__, imx_ep->ep.name); | |
415 | return -1; | |
416 | } | |
417 | ||
418 | req->req.actual += length; | |
419 | count = length; | |
420 | ||
421 | if (!count && req->req.zero) { /* zlp */ | |
422 | temp = __raw_readl(imx_ep->imx_usb->base | |
423 | + USB_EP_STAT(EP_NO(imx_ep))); | |
424 | __raw_writel(temp | EPSTAT_ZLPS, imx_ep->imx_usb->base | |
425 | + USB_EP_STAT(EP_NO(imx_ep))); | |
426 | D_TRX(imx_ep->imx_usb->dev, "<%s> zero packet\n", __func__); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | while (count--) { | |
431 | if (count == 0) { /* last byte */ | |
432 | temp = __raw_readl(imx_ep->imx_usb->base | |
433 | + USB_EP_FCTRL(EP_NO(imx_ep))); | |
434 | __raw_writel(temp | FCTRL_WFR, imx_ep->imx_usb->base | |
435 | + USB_EP_FCTRL(EP_NO(imx_ep))); | |
436 | } | |
437 | __raw_writeb(*buf++, | |
438 | imx_ep->imx_usb->base + USB_EP_FDAT0(EP_NO(imx_ep))); | |
439 | } | |
440 | ||
441 | return length; | |
442 | } | |
443 | ||
444 | static int read_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
445 | { | |
446 | int bytes = 0, | |
447 | count, | |
448 | completed = 0; | |
449 | ||
450 | while (__raw_readl(imx_ep->imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep))) | |
451 | & FSTAT_FR) { | |
452 | count = read_packet(imx_ep, req); | |
453 | bytes += count; | |
454 | ||
455 | completed = (count != imx_ep->fifosize); | |
456 | if (completed || req->req.actual == req->req.length) { | |
457 | completed = 1; | |
458 | break; | |
459 | } | |
460 | } | |
461 | ||
462 | if (completed || !req->req.length) { | |
463 | done(imx_ep, req, 0); | |
464 | D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n", | |
465 | __func__, imx_ep->ep.name, req, | |
466 | completed ? "completed" : "not completed"); | |
467 | if (!EP_NO(imx_ep)) | |
468 | ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE); | |
469 | } | |
470 | ||
471 | D_TRX(imx_ep->imx_usb->dev, "<%s> bytes read: %d\n", __func__, bytes); | |
472 | ||
473 | return completed; | |
474 | } | |
475 | ||
476 | static int write_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
477 | { | |
478 | int bytes = 0, | |
479 | count, | |
480 | completed = 0; | |
481 | ||
482 | while (!completed) { | |
483 | count = write_packet(imx_ep, req); | |
484 | if (count < 0) | |
485 | break; /* busy */ | |
486 | bytes += count; | |
487 | ||
488 | /* last packet "must be" short (or a zlp) */ | |
489 | completed = (count != imx_ep->fifosize); | |
490 | ||
491 | if (unlikely(completed)) { | |
492 | done(imx_ep, req, 0); | |
493 | D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n", | |
494 | __func__, imx_ep->ep.name, req, | |
495 | completed ? "completed" : "not completed"); | |
496 | if (!EP_NO(imx_ep)) | |
497 | ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE); | |
498 | } | |
499 | } | |
500 | ||
501 | D_TRX(imx_ep->imx_usb->dev, "<%s> bytes sent: %d\n", __func__, bytes); | |
502 | ||
503 | return completed; | |
504 | } | |
505 | ||
506 | /******************************************************************************* | |
507 | * Endpoint handlers | |
508 | ******************************************************************************* | |
509 | */ | |
510 | static int handle_ep(struct imx_ep_struct *imx_ep) | |
511 | { | |
512 | struct imx_request *req; | |
513 | int completed = 0; | |
514 | ||
515 | do { | |
516 | if (!list_empty(&imx_ep->queue)) | |
517 | req = list_entry(imx_ep->queue.next, | |
518 | struct imx_request, queue); | |
519 | else { | |
520 | D_REQ(imx_ep->imx_usb->dev, "<%s> no request on %s\n", | |
521 | __func__, imx_ep->ep.name); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | if (EP_DIR(imx_ep)) /* to host */ | |
526 | completed = write_fifo(imx_ep, req); | |
527 | else /* to device */ | |
528 | completed = read_fifo(imx_ep, req); | |
529 | ||
530 | dump_ep_stat(__func__, imx_ep); | |
531 | ||
532 | } while (completed); | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static int handle_ep0(struct imx_ep_struct *imx_ep) | |
538 | { | |
539 | struct imx_request *req = NULL; | |
540 | int ret = 0; | |
541 | ||
542 | if (!list_empty(&imx_ep->queue)) | |
543 | req = list_entry(imx_ep->queue.next, struct imx_request, queue); | |
544 | ||
545 | if (req) { | |
546 | switch (imx_ep->imx_usb->ep0state) { | |
547 | ||
548 | case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR */ | |
549 | write_fifo(imx_ep, req); | |
550 | break; | |
551 | case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR */ | |
552 | read_fifo(imx_ep, req); | |
553 | break; | |
554 | default: | |
555 | D_EP0(imx_ep->imx_usb->dev, | |
556 | "<%s> ep0 i/o, odd state %d\n", | |
557 | __func__, imx_ep->imx_usb->ep0state); | |
558 | ep_del_request(imx_ep, req); | |
559 | ret = -EL2HLT; | |
560 | break; | |
561 | } | |
562 | } | |
563 | ||
564 | return ret; | |
565 | } | |
566 | ||
567 | static void handle_ep0_devreq(struct imx_udc_struct *imx_usb) | |
568 | { | |
569 | struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0]; | |
570 | union { | |
571 | struct usb_ctrlrequest r; | |
572 | u8 raw[8]; | |
573 | u32 word[2]; | |
574 | } u; | |
575 | int temp, i; | |
576 | ||
577 | nuke(imx_ep, -EPROTO); | |
578 | ||
579 | /* read SETUP packet */ | |
580 | for (i = 0; i < 2; i++) { | |
581 | if (imx_ep_empty(imx_ep)) { | |
582 | D_ERR(imx_usb->dev, | |
583 | "<%s> no setup packet received\n", __func__); | |
584 | goto stall; | |
585 | } | |
586 | u.word[i] = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep))); | |
587 | } | |
588 | ||
589 | temp = imx_ep_empty(imx_ep); | |
590 | while (!imx_ep_empty(imx_ep)) { | |
591 | i = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep))); | |
592 | D_ERR(imx_usb->dev, | |
593 | "<%s> wrong to have extra bytes for setup : 0x%08x\n", | |
594 | __func__, i); | |
595 | } | |
596 | if (!temp) | |
597 | goto stall; | |
598 | ||
599 | le16_to_cpus(&u.r.wValue); | |
600 | le16_to_cpus(&u.r.wIndex); | |
601 | le16_to_cpus(&u.r.wLength); | |
602 | ||
603 | D_REQ(imx_usb->dev, "<%s> SETUP %02x.%02x v%04x i%04x l%04x\n", | |
604 | __func__, u.r.bRequestType, u.r.bRequest, | |
605 | u.r.wValue, u.r.wIndex, u.r.wLength); | |
606 | ||
607 | if (imx_usb->set_config) { | |
608 | /* NACK the host by using CMDOVER */ | |
609 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
610 | __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL); | |
611 | ||
612 | D_ERR(imx_usb->dev, | |
613 | "<%s> set config req is pending, NACK the host\n", | |
614 | __func__); | |
615 | return; | |
616 | } | |
617 | ||
618 | if (u.r.bRequestType & USB_DIR_IN) | |
619 | ep0_chg_stat(__func__, imx_usb, EP0_IN_DATA_PHASE); | |
620 | else | |
621 | ep0_chg_stat(__func__, imx_usb, EP0_OUT_DATA_PHASE); | |
622 | ||
623 | i = imx_usb->driver->setup(&imx_usb->gadget, &u.r); | |
624 | if (i < 0) { | |
625 | D_ERR(imx_usb->dev, "<%s> device setup error %d\n", | |
626 | __func__, i); | |
627 | goto stall; | |
628 | } | |
629 | ||
630 | return; | |
631 | stall: | |
632 | D_ERR(imx_usb->dev, "<%s> protocol STALL\n", __func__); | |
633 | imx_ep_stall(imx_ep); | |
634 | ep0_chg_stat(__func__, imx_usb, EP0_STALL); | |
635 | return; | |
636 | } | |
637 | ||
638 | /******************************************************************************* | |
639 | * USB gadget callback functions | |
640 | ******************************************************************************* | |
641 | */ | |
642 | ||
643 | static int imx_ep_enable(struct usb_ep *usb_ep, | |
644 | const struct usb_endpoint_descriptor *desc) | |
645 | { | |
646 | struct imx_ep_struct *imx_ep = container_of(usb_ep, | |
647 | struct imx_ep_struct, ep); | |
648 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
649 | unsigned long flags; | |
650 | ||
651 | if (!usb_ep | |
652 | || !desc | |
653 | || !EP_NO(imx_ep) | |
654 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
655 | || imx_ep->bEndpointAddress != desc->bEndpointAddress) { | |
656 | D_ERR(imx_usb->dev, | |
657 | "<%s> bad ep or descriptor\n", __func__); | |
658 | return -EINVAL; | |
659 | } | |
660 | ||
661 | if (imx_ep->bmAttributes != desc->bmAttributes) { | |
662 | D_ERR(imx_usb->dev, | |
663 | "<%s> %s type mismatch\n", __func__, usb_ep->name); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
667 | if (imx_ep->fifosize < le16_to_cpu(desc->wMaxPacketSize)) { | |
668 | D_ERR(imx_usb->dev, | |
669 | "<%s> bad %s maxpacket\n", __func__, usb_ep->name); | |
670 | return -ERANGE; | |
671 | } | |
672 | ||
673 | if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { | |
674 | D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__); | |
675 | return -ESHUTDOWN; | |
676 | } | |
677 | ||
678 | local_irq_save(flags); | |
679 | ||
680 | imx_ep->stopped = 0; | |
681 | imx_flush(imx_ep); | |
682 | imx_ep_irq_enable(imx_ep); | |
683 | ||
684 | local_irq_restore(flags); | |
685 | ||
686 | D_EPX(imx_usb->dev, "<%s> ENABLED %s\n", __func__, usb_ep->name); | |
687 | return 0; | |
688 | } | |
689 | ||
690 | static int imx_ep_disable(struct usb_ep *usb_ep) | |
691 | { | |
692 | struct imx_ep_struct *imx_ep = container_of(usb_ep, | |
693 | struct imx_ep_struct, ep); | |
694 | unsigned long flags; | |
695 | ||
696 | if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { | |
697 | D_ERR(imx_ep->imx_usb->dev, "<%s> %s can not be disabled\n", | |
698 | __func__, usb_ep ? imx_ep->ep.name : NULL); | |
699 | return -EINVAL; | |
700 | } | |
701 | ||
702 | local_irq_save(flags); | |
703 | ||
704 | imx_ep->stopped = 1; | |
705 | nuke(imx_ep, -ESHUTDOWN); | |
706 | imx_flush(imx_ep); | |
707 | imx_ep_irq_disable(imx_ep); | |
708 | ||
709 | local_irq_restore(flags); | |
710 | ||
711 | D_EPX(imx_ep->imx_usb->dev, | |
712 | "<%s> DISABLED %s\n", __func__, usb_ep->name); | |
713 | return 0; | |
714 | } | |
715 | ||
716 | static struct usb_request *imx_ep_alloc_request | |
717 | (struct usb_ep *usb_ep, gfp_t gfp_flags) | |
718 | { | |
719 | struct imx_request *req; | |
720 | ||
721 | req = kzalloc(sizeof *req, gfp_flags); | |
722 | if (!req || !usb_ep) | |
723 | return 0; | |
724 | ||
725 | INIT_LIST_HEAD(&req->queue); | |
726 | req->in_use = 0; | |
727 | ||
728 | return &req->req; | |
729 | } | |
730 | ||
731 | static void imx_ep_free_request | |
732 | (struct usb_ep *usb_ep, struct usb_request *usb_req) | |
733 | { | |
734 | struct imx_request *req; | |
735 | ||
736 | req = container_of(usb_req, struct imx_request, req); | |
737 | WARN_ON(!list_empty(&req->queue)); | |
738 | kfree(req); | |
739 | } | |
740 | ||
741 | static int imx_ep_queue | |
742 | (struct usb_ep *usb_ep, struct usb_request *usb_req, gfp_t gfp_flags) | |
743 | { | |
744 | struct imx_ep_struct *imx_ep; | |
745 | struct imx_udc_struct *imx_usb; | |
746 | struct imx_request *req; | |
747 | unsigned long flags; | |
748 | int ret = 0; | |
749 | ||
750 | imx_ep = container_of(usb_ep, struct imx_ep_struct, ep); | |
751 | imx_usb = imx_ep->imx_usb; | |
752 | req = container_of(usb_req, struct imx_request, req); | |
753 | ||
754 | /* | |
755 | Special care on IMX udc. | |
756 | Ignore enqueue when after set configuration from the | |
757 | host. This assume all gadget drivers reply set | |
758 | configuration with the next ep0 req enqueue. | |
759 | */ | |
760 | if (imx_usb->set_config && !EP_NO(imx_ep)) { | |
761 | imx_usb->set_config = 0; | |
762 | D_EPX(imx_usb->dev, | |
763 | "<%s> gadget reply set config\n", __func__); | |
764 | return 0; | |
765 | } | |
766 | ||
767 | if (unlikely(!usb_req || !req || !usb_req->complete || !usb_req->buf)) { | |
768 | D_ERR(imx_usb->dev, "<%s> bad params\n", __func__); | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
772 | if (unlikely(!usb_ep || !imx_ep)) { | |
773 | D_ERR(imx_usb->dev, "<%s> bad ep\n", __func__); | |
774 | return -EINVAL; | |
775 | } | |
776 | ||
777 | if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { | |
778 | D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__); | |
779 | return -ESHUTDOWN; | |
780 | } | |
781 | ||
782 | local_irq_save(flags); | |
783 | ||
784 | /* Debug */ | |
785 | D_REQ(imx_usb->dev, "<%s> ep%d %s request for [%d] bytes\n", | |
786 | __func__, EP_NO(imx_ep), | |
787 | ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state == EP0_IN_DATA_PHASE) | |
788 | || (EP_NO(imx_ep) && EP_DIR(imx_ep))) ? "IN" : "OUT", usb_req->length); | |
789 | dump_req(__func__, imx_ep, usb_req); | |
790 | ||
791 | if (imx_ep->stopped) { | |
792 | usb_req->status = -ESHUTDOWN; | |
793 | ret = -ESHUTDOWN; | |
794 | goto out; | |
795 | } | |
796 | ||
797 | if (req->in_use) { | |
798 | D_ERR(imx_usb->dev, | |
799 | "<%s> refusing to queue req %p (already queued)\n", | |
800 | __func__, req); | |
801 | goto out; | |
802 | } | |
803 | ||
804 | usb_req->status = -EINPROGRESS; | |
805 | usb_req->actual = 0; | |
806 | ||
807 | ep_add_request(imx_ep, req); | |
808 | ||
809 | if (!EP_NO(imx_ep)) | |
810 | ret = handle_ep0(imx_ep); | |
811 | else | |
812 | ret = handle_ep(imx_ep); | |
813 | out: | |
814 | local_irq_restore(flags); | |
815 | return ret; | |
816 | } | |
817 | ||
818 | static int imx_ep_dequeue(struct usb_ep *usb_ep, struct usb_request *usb_req) | |
819 | { | |
820 | ||
821 | struct imx_ep_struct *imx_ep = container_of | |
822 | (usb_ep, struct imx_ep_struct, ep); | |
823 | struct imx_request *req; | |
824 | unsigned long flags; | |
825 | ||
826 | if (unlikely(!usb_ep || !EP_NO(imx_ep))) { | |
827 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
828 | return -EINVAL; | |
829 | } | |
830 | ||
831 | local_irq_save(flags); | |
832 | ||
833 | /* make sure it's actually queued on this endpoint */ | |
834 | list_for_each_entry(req, &imx_ep->queue, queue) { | |
835 | if (&req->req == usb_req) | |
836 | break; | |
837 | } | |
838 | if (&req->req != usb_req) { | |
839 | local_irq_restore(flags); | |
840 | return -EINVAL; | |
841 | } | |
842 | ||
843 | done(imx_ep, req, -ECONNRESET); | |
844 | ||
845 | local_irq_restore(flags); | |
846 | return 0; | |
847 | } | |
848 | ||
849 | static int imx_ep_set_halt(struct usb_ep *usb_ep, int value) | |
850 | { | |
851 | struct imx_ep_struct *imx_ep = container_of | |
852 | (usb_ep, struct imx_ep_struct, ep); | |
853 | unsigned long flags; | |
854 | ||
855 | if (unlikely(!usb_ep || !EP_NO(imx_ep))) { | |
856 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
857 | return -EINVAL; | |
858 | } | |
859 | ||
860 | local_irq_save(flags); | |
861 | ||
862 | if ((imx_ep->bEndpointAddress & USB_DIR_IN) | |
863 | && !list_empty(&imx_ep->queue)) { | |
864 | local_irq_restore(flags); | |
865 | return -EAGAIN; | |
866 | } | |
867 | ||
868 | imx_ep_stall(imx_ep); | |
869 | ||
870 | local_irq_restore(flags); | |
871 | ||
872 | D_EPX(imx_ep->imx_usb->dev, "<%s> %s halt\n", __func__, usb_ep->name); | |
873 | return 0; | |
874 | } | |
875 | ||
876 | static int imx_ep_fifo_status(struct usb_ep *usb_ep) | |
877 | { | |
878 | struct imx_ep_struct *imx_ep = container_of | |
879 | (usb_ep, struct imx_ep_struct, ep); | |
880 | ||
881 | if (!usb_ep) { | |
882 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
883 | return -ENODEV; | |
884 | } | |
885 | ||
886 | if (imx_ep->imx_usb->gadget.speed == USB_SPEED_UNKNOWN) | |
887 | return 0; | |
888 | else | |
889 | return imx_fifo_bcount(imx_ep); | |
890 | } | |
891 | ||
892 | static void imx_ep_fifo_flush(struct usb_ep *usb_ep) | |
893 | { | |
894 | struct imx_ep_struct *imx_ep = container_of | |
895 | (usb_ep, struct imx_ep_struct, ep); | |
896 | unsigned long flags; | |
897 | ||
898 | local_irq_save(flags); | |
899 | ||
900 | if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { | |
901 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
902 | local_irq_restore(flags); | |
903 | return; | |
904 | } | |
905 | ||
906 | /* toggle and halt bits stay unchanged */ | |
907 | imx_flush(imx_ep); | |
908 | ||
909 | local_irq_restore(flags); | |
910 | } | |
911 | ||
912 | static struct usb_ep_ops imx_ep_ops = { | |
913 | .enable = imx_ep_enable, | |
914 | .disable = imx_ep_disable, | |
915 | ||
916 | .alloc_request = imx_ep_alloc_request, | |
917 | .free_request = imx_ep_free_request, | |
918 | ||
919 | .queue = imx_ep_queue, | |
920 | .dequeue = imx_ep_dequeue, | |
921 | ||
922 | .set_halt = imx_ep_set_halt, | |
923 | .fifo_status = imx_ep_fifo_status, | |
924 | .fifo_flush = imx_ep_fifo_flush, | |
925 | }; | |
926 | ||
927 | /******************************************************************************* | |
928 | * USB endpoint control functions | |
929 | ******************************************************************************* | |
930 | */ | |
931 | ||
932 | void ep0_chg_stat(const char *label, | |
933 | struct imx_udc_struct *imx_usb, enum ep0_state stat) | |
934 | { | |
935 | D_EP0(imx_usb->dev, "<%s> from %15s to %15s\n", | |
936 | label, state_name[imx_usb->ep0state], state_name[stat]); | |
937 | ||
938 | if (imx_usb->ep0state == stat) | |
939 | return; | |
940 | ||
941 | imx_usb->ep0state = stat; | |
942 | } | |
943 | ||
944 | static void usb_init_data(struct imx_udc_struct *imx_usb) | |
945 | { | |
946 | struct imx_ep_struct *imx_ep; | |
947 | u8 i; | |
948 | ||
949 | /* device/ep0 records init */ | |
950 | INIT_LIST_HEAD(&imx_usb->gadget.ep_list); | |
951 | INIT_LIST_HEAD(&imx_usb->gadget.ep0->ep_list); | |
952 | ep0_chg_stat(__func__, imx_usb, EP0_IDLE); | |
953 | ||
954 | /* basic endpoint records init */ | |
955 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
956 | imx_ep = &imx_usb->imx_ep[i]; | |
957 | ||
958 | if (i) { | |
959 | list_add_tail(&imx_ep->ep.ep_list, | |
960 | &imx_usb->gadget.ep_list); | |
961 | imx_ep->stopped = 1; | |
962 | } else | |
963 | imx_ep->stopped = 0; | |
964 | ||
965 | INIT_LIST_HEAD(&imx_ep->queue); | |
966 | } | |
967 | } | |
968 | ||
969 | static void udc_stop_activity(struct imx_udc_struct *imx_usb, | |
970 | struct usb_gadget_driver *driver) | |
971 | { | |
972 | struct imx_ep_struct *imx_ep; | |
973 | int i; | |
974 | ||
975 | if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN) | |
976 | driver = NULL; | |
977 | ||
978 | /* prevent new request submissions, kill any outstanding requests */ | |
979 | for (i = 1; i < IMX_USB_NB_EP; i++) { | |
980 | imx_ep = &imx_usb->imx_ep[i]; | |
981 | imx_flush(imx_ep); | |
982 | imx_ep->stopped = 1; | |
983 | imx_ep_irq_disable(imx_ep); | |
984 | nuke(imx_ep, -ESHUTDOWN); | |
985 | } | |
986 | ||
987 | imx_usb->cfg = 0; | |
988 | imx_usb->intf = 0; | |
989 | imx_usb->alt = 0; | |
990 | ||
991 | if (driver) | |
992 | driver->disconnect(&imx_usb->gadget); | |
993 | } | |
994 | ||
995 | /******************************************************************************* | |
996 | * Interrupt handlers | |
997 | ******************************************************************************* | |
998 | */ | |
999 | ||
1000 | static irqreturn_t imx_udc_irq(int irq, void *dev) | |
1001 | { | |
1002 | struct imx_udc_struct *imx_usb = dev; | |
1003 | struct usb_ctrlrequest u; | |
1004 | int temp, cfg, intf, alt; | |
1005 | int intr = __raw_readl(imx_usb->base + USB_INTR); | |
1006 | ||
1007 | if (intr & (INTR_WAKEUP | INTR_SUSPEND | INTR_RESUME | INTR_RESET_START | |
1008 | | INTR_RESET_STOP | INTR_CFG_CHG)) { | |
1009 | dump_intr(__func__, intr, imx_usb->dev); | |
1010 | dump_usb_stat(__func__, imx_usb); | |
1011 | } | |
1012 | ||
1013 | if (!imx_usb->driver) { | |
1014 | /*imx_udc_disable(imx_usb);*/ | |
1015 | goto end_irq; | |
1016 | } | |
1017 | ||
1018 | if (intr & INTR_WAKEUP) { | |
1019 | if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN | |
1020 | && imx_usb->driver && imx_usb->driver->resume) | |
1021 | imx_usb->driver->resume(&imx_usb->gadget); | |
1022 | imx_usb->set_config = 0; | |
1023 | imx_usb->gadget.speed = USB_SPEED_FULL; | |
1024 | } | |
1025 | ||
1026 | if (intr & INTR_SUSPEND) { | |
1027 | if (imx_usb->gadget.speed != USB_SPEED_UNKNOWN | |
1028 | && imx_usb->driver && imx_usb->driver->suspend) | |
1029 | imx_usb->driver->suspend(&imx_usb->gadget); | |
1030 | imx_usb->set_config = 0; | |
1031 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
1032 | } | |
1033 | ||
1034 | if (intr & INTR_RESET_START) { | |
1035 | __raw_writel(intr, imx_usb->base + USB_INTR); | |
1036 | udc_stop_activity(imx_usb, imx_usb->driver); | |
1037 | imx_usb->set_config = 0; | |
1038 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
1039 | } | |
1040 | ||
1041 | if (intr & INTR_RESET_STOP) | |
1042 | imx_usb->gadget.speed = USB_SPEED_FULL; | |
1043 | ||
1044 | if (intr & INTR_CFG_CHG) { | |
1045 | __raw_writel(INTR_CFG_CHG, imx_usb->base + USB_INTR); | |
1046 | temp = __raw_readl(imx_usb->base + USB_STAT); | |
1047 | cfg = (temp & STAT_CFG) >> 5; | |
1048 | intf = (temp & STAT_INTF) >> 3; | |
1049 | alt = temp & STAT_ALTSET; | |
1050 | ||
1051 | D_REQ(imx_usb->dev, | |
1052 | "<%s> orig config C=%d, I=%d, A=%d / " | |
1053 | "req config C=%d, I=%d, A=%d\n", | |
1054 | __func__, imx_usb->cfg, imx_usb->intf, imx_usb->alt, | |
1055 | cfg, intf, alt); | |
1056 | ||
1057 | if (cfg != 1 && cfg != 2) | |
1058 | goto end_irq; | |
1059 | ||
1060 | imx_usb->set_config = 0; | |
1061 | ||
1062 | /* Config setup */ | |
1063 | if (imx_usb->cfg != cfg) { | |
1064 | D_REQ(imx_usb->dev, "<%s> Change config start\n",__func__); | |
1065 | u.bRequest = USB_REQ_SET_CONFIGURATION; | |
1066 | u.bRequestType = USB_DIR_OUT | | |
1067 | USB_TYPE_STANDARD | | |
1068 | USB_RECIP_DEVICE; | |
1069 | u.wValue = cfg; | |
1070 | u.wIndex = 0; | |
1071 | u.wLength = 0; | |
1072 | imx_usb->cfg = cfg; | |
1073 | imx_usb->set_config = 1; | |
1074 | imx_usb->driver->setup(&imx_usb->gadget, &u); | |
1075 | imx_usb->set_config = 0; | |
1076 | D_REQ(imx_usb->dev, "<%s> Change config done\n",__func__); | |
1077 | ||
1078 | } | |
1079 | if (imx_usb->intf != intf || imx_usb->alt != alt) { | |
1080 | D_REQ(imx_usb->dev, "<%s> Change interface start\n",__func__); | |
1081 | u.bRequest = USB_REQ_SET_INTERFACE; | |
1082 | u.bRequestType = USB_DIR_OUT | | |
1083 | USB_TYPE_STANDARD | | |
1084 | USB_RECIP_INTERFACE; | |
1085 | u.wValue = alt; | |
1086 | u.wIndex = intf; | |
1087 | u.wLength = 0; | |
1088 | imx_usb->intf = intf; | |
1089 | imx_usb->alt = alt; | |
1090 | imx_usb->set_config = 1; | |
1091 | imx_usb->driver->setup(&imx_usb->gadget, &u); | |
1092 | imx_usb->set_config = 0; | |
1093 | D_REQ(imx_usb->dev, "<%s> Change interface done\n",__func__); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | if (intr & INTR_SOF) { | |
1098 | if (imx_usb->ep0state == EP0_IDLE) { | |
1099 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
1100 | __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | end_irq: | |
1105 | __raw_writel(intr, imx_usb->base + USB_INTR); | |
1106 | return IRQ_HANDLED; | |
1107 | } | |
1108 | ||
1109 | static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev) | |
1110 | { | |
1111 | struct imx_udc_struct *imx_usb = dev; | |
1112 | int intr = __raw_readl(imx_usb->base + USB_EP_INTR(0)); | |
1113 | ||
1114 | dump_ep_intr(__func__, 0, intr, imx_usb->dev); | |
1115 | ||
1116 | if (!imx_usb->driver) { | |
1117 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); | |
1118 | return IRQ_HANDLED; | |
1119 | } | |
1120 | ||
1121 | /* DEVREQ IRQ has highest priority */ | |
1122 | if (intr & (EPINTR_DEVREQ | EPINTR_MDEVREQ)) | |
1123 | handle_ep0_devreq(imx_usb); | |
1124 | /* Seem i.MX is missing EOF interrupt sometimes. | |
1125 | * Therefore we monitor both EOF and FIFO_EMPTY interrups | |
1126 | * when transmiting, and both EOF and FIFO_FULL when | |
1127 | * receiving data. | |
1128 | */ | |
1129 | else if (intr & (EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL)) | |
1130 | handle_ep0(&imx_usb->imx_ep[0]); | |
1131 | ||
1132 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); | |
1133 | ||
1134 | return IRQ_HANDLED; | |
1135 | } | |
1136 | ||
1137 | static irqreturn_t imx_udc_bulk_irq(int irq, void *dev) | |
1138 | { | |
1139 | struct imx_udc_struct *imx_usb = dev; | |
1140 | struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[irq - USBD_INT0]; | |
1141 | int intr = __raw_readl(imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1142 | ||
1143 | dump_ep_intr(__func__, irq - USBD_INT0, intr, imx_usb->dev); | |
1144 | ||
1145 | if (!imx_usb->driver) { | |
1146 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1147 | return IRQ_HANDLED; | |
1148 | } | |
1149 | ||
1150 | handle_ep(imx_ep); | |
1151 | ||
1152 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1153 | ||
1154 | return IRQ_HANDLED; | |
1155 | } | |
1156 | ||
1157 | irq_handler_t intr_handler(int i) | |
1158 | { | |
1159 | switch (i) { | |
1160 | case 0: | |
1161 | return imx_udc_ctrl_irq; | |
1162 | case 1: | |
1163 | case 2: | |
1164 | case 3: | |
1165 | case 4: | |
1166 | case 5: | |
1167 | return imx_udc_bulk_irq; | |
1168 | default: | |
1169 | return imx_udc_irq; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /******************************************************************************* | |
1174 | * Static defined IMX UDC structure | |
1175 | ******************************************************************************* | |
1176 | */ | |
1177 | ||
1178 | static const struct usb_gadget_ops imx_udc_ops = { | |
1179 | .get_frame = imx_udc_get_frame, | |
1180 | .wakeup = imx_udc_wakeup, | |
1181 | }; | |
1182 | ||
1183 | static struct imx_udc_struct controller = { | |
1184 | .gadget = { | |
1185 | .ops = &imx_udc_ops, | |
1186 | .ep0 = &controller.imx_ep[0].ep, | |
1187 | .name = driver_name, | |
1188 | .dev = { | |
1189 | .bus_id = "gadget", | |
1190 | }, | |
1191 | }, | |
1192 | ||
1193 | .imx_ep[0] = { | |
1194 | .ep = { | |
1195 | .name = ep0name, | |
1196 | .ops = &imx_ep_ops, | |
1197 | .maxpacket = 32, | |
1198 | }, | |
1199 | .imx_usb = &controller, | |
1200 | .fifosize = 32, | |
1201 | .bEndpointAddress = 0, | |
1202 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
1203 | }, | |
1204 | .imx_ep[1] = { | |
1205 | .ep = { | |
1206 | .name = "ep1in-bulk", | |
1207 | .ops = &imx_ep_ops, | |
1208 | .maxpacket = 64, | |
1209 | }, | |
1210 | .imx_usb = &controller, | |
1211 | .fifosize = 64, | |
1212 | .bEndpointAddress = USB_DIR_IN | 1, | |
1213 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1214 | }, | |
1215 | .imx_ep[2] = { | |
1216 | .ep = { | |
1217 | .name = "ep2out-bulk", | |
1218 | .ops = &imx_ep_ops, | |
1219 | .maxpacket = 64, | |
1220 | }, | |
1221 | .imx_usb = &controller, | |
1222 | .fifosize = 64, | |
1223 | .bEndpointAddress = USB_DIR_OUT | 2, | |
1224 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1225 | }, | |
1226 | .imx_ep[3] = { | |
1227 | .ep = { | |
1228 | .name = "ep3out-bulk", | |
1229 | .ops = &imx_ep_ops, | |
1230 | .maxpacket = 32, | |
1231 | }, | |
1232 | .imx_usb = &controller, | |
1233 | .fifosize = 32, | |
1234 | .bEndpointAddress = USB_DIR_OUT | 3, | |
1235 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1236 | }, | |
1237 | .imx_ep[4] = { | |
1238 | .ep = { | |
1239 | .name = "ep4in-int", | |
1240 | .ops = &imx_ep_ops, | |
1241 | .maxpacket = 32, | |
1242 | }, | |
1243 | .imx_usb = &controller, | |
1244 | .fifosize = 32, | |
1245 | .bEndpointAddress = USB_DIR_IN | 4, | |
1246 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
1247 | }, | |
1248 | .imx_ep[5] = { | |
1249 | .ep = { | |
1250 | .name = "ep5out-int", | |
1251 | .ops = &imx_ep_ops, | |
1252 | .maxpacket = 32, | |
1253 | }, | |
1254 | .imx_usb = &controller, | |
1255 | .fifosize = 32, | |
1256 | .bEndpointAddress = USB_DIR_OUT | 5, | |
1257 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
1258 | }, | |
1259 | }; | |
1260 | ||
1261 | /******************************************************************************* | |
1262 | * USB gadged driver functions | |
1263 | ******************************************************************************* | |
1264 | */ | |
1265 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
1266 | { | |
1267 | struct imx_udc_struct *imx_usb = &controller; | |
1268 | int retval; | |
1269 | ||
1270 | if (!driver | |
1271 | || driver->speed < USB_SPEED_FULL | |
1272 | || !driver->bind | |
1273 | || !driver->disconnect | |
1274 | || !driver->setup) | |
1275 | return -EINVAL; | |
1276 | if (!imx_usb) | |
1277 | return -ENODEV; | |
1278 | if (imx_usb->driver) | |
1279 | return -EBUSY; | |
1280 | ||
1281 | /* first hook up the driver ... */ | |
1282 | imx_usb->driver = driver; | |
1283 | imx_usb->gadget.dev.driver = &driver->driver; | |
1284 | ||
1285 | retval = device_add(&imx_usb->gadget.dev); | |
1286 | if (retval) | |
1287 | goto fail; | |
1288 | retval = driver->bind(&imx_usb->gadget); | |
1289 | if (retval) { | |
1290 | D_ERR(imx_usb->dev, "<%s> bind to driver %s --> error %d\n", | |
1291 | __func__, driver->driver.name, retval); | |
1292 | device_del(&imx_usb->gadget.dev); | |
1293 | ||
1294 | goto fail; | |
1295 | } | |
1296 | ||
1297 | D_INI(imx_usb->dev, "<%s> registered gadget driver '%s'\n", | |
1298 | __func__, driver->driver.name); | |
1299 | ||
1300 | imx_udc_enable(imx_usb); | |
1301 | ||
1302 | return 0; | |
1303 | fail: | |
1304 | imx_usb->driver = NULL; | |
1305 | imx_usb->gadget.dev.driver = NULL; | |
1306 | return retval; | |
1307 | } | |
1308 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
1309 | ||
1310 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1311 | { | |
1312 | struct imx_udc_struct *imx_usb = &controller; | |
1313 | ||
1314 | if (!imx_usb) | |
1315 | return -ENODEV; | |
1316 | if (!driver || driver != imx_usb->driver || !driver->unbind) | |
1317 | return -EINVAL; | |
1318 | ||
1319 | udc_stop_activity(imx_usb, driver); | |
1320 | imx_udc_disable(imx_usb); | |
1321 | ||
1322 | driver->unbind(&imx_usb->gadget); | |
1323 | imx_usb->gadget.dev.driver = NULL; | |
1324 | imx_usb->driver = NULL; | |
1325 | ||
1326 | device_del(&imx_usb->gadget.dev); | |
1327 | ||
1328 | D_INI(imx_usb->dev, "<%s> unregistered gadget driver '%s'\n", | |
1329 | __func__, driver->driver.name); | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
1334 | ||
1335 | /******************************************************************************* | |
1336 | * Module functions | |
1337 | ******************************************************************************* | |
1338 | */ | |
1339 | ||
1340 | static int __init imx_udc_probe(struct platform_device *pdev) | |
1341 | { | |
1342 | struct imx_udc_struct *imx_usb = &controller; | |
1343 | struct resource *res; | |
1344 | struct imxusb_platform_data *pdata; | |
1345 | struct clk *clk; | |
1346 | void __iomem *base; | |
1347 | int ret = 0; | |
1348 | int i, res_size; | |
1349 | ||
1350 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1351 | if (!res) { | |
1352 | dev_err(&pdev->dev, "can't get device resources\n"); | |
1353 | return -ENODEV; | |
1354 | } | |
1355 | ||
1356 | pdata = pdev->dev.platform_data; | |
1357 | if (!pdata) { | |
1358 | dev_err(&pdev->dev, "driver needs platform data\n"); | |
1359 | return -ENODEV; | |
1360 | } | |
1361 | ||
1362 | res_size = res->end - res->start + 1; | |
1363 | if (!request_mem_region(res->start, res_size, res->name)) { | |
1364 | dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n", | |
1365 | res_size, res->start); | |
1366 | return -ENOMEM; | |
1367 | } | |
1368 | ||
1369 | if (pdata->init) { | |
1370 | ret = pdata->init(&pdev->dev); | |
1371 | if (ret) | |
1372 | goto fail0; | |
1373 | } | |
1374 | ||
1375 | base = ioremap(res->start, res_size); | |
1376 | if (!base) { | |
1377 | dev_err(&pdev->dev, "ioremap failed\n"); | |
1378 | ret = -EIO; | |
1379 | goto fail1; | |
1380 | } | |
1381 | ||
1382 | clk = clk_get(NULL, "usbd_clk"); | |
1383 | if (IS_ERR(clk)) { | |
1384 | ret = PTR_ERR(clk); | |
1385 | dev_err(&pdev->dev, "can't get USB clock\n"); | |
1386 | goto fail2; | |
1387 | } | |
1388 | clk_enable(clk); | |
1389 | ||
1390 | if (clk_get_rate(clk) != 48000000) { | |
1391 | D_INI(&pdev->dev, | |
1392 | "Bad USB clock (%d Hz), changing to 48000000 Hz\n", | |
1393 | (int)clk_get_rate(clk)); | |
1394 | if (clk_set_rate(clk, 48000000)) { | |
1395 | dev_err(&pdev->dev, | |
1396 | "Unable to set correct USB clock (48MHz)\n"); | |
1397 | ret = -EIO; | |
1398 | goto fail3; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) { | |
1403 | imx_usb->usbd_int[i] = platform_get_irq(pdev, i); | |
1404 | if (imx_usb->usbd_int[i] < 0) { | |
1405 | dev_err(&pdev->dev, "can't get irq number\n"); | |
1406 | ret = -ENODEV; | |
1407 | goto fail3; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) { | |
1412 | ret = request_irq(imx_usb->usbd_int[i], intr_handler(i), | |
1413 | IRQF_DISABLED, driver_name, imx_usb); | |
1414 | if (ret) { | |
1415 | dev_err(&pdev->dev, "can't get irq %i, err %d\n", | |
1416 | imx_usb->usbd_int[i], ret); | |
1417 | for (--i; i >= 0; i--) | |
1418 | free_irq(imx_usb->usbd_int[i], imx_usb); | |
1419 | goto fail3; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | imx_usb->res = res; | |
1424 | imx_usb->base = base; | |
1425 | imx_usb->clk = clk; | |
1426 | imx_usb->dev = &pdev->dev; | |
1427 | ||
1428 | device_initialize(&imx_usb->gadget.dev); | |
1429 | ||
1430 | imx_usb->gadget.dev.parent = &pdev->dev; | |
1431 | imx_usb->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1432 | ||
1433 | platform_set_drvdata(pdev, imx_usb); | |
1434 | ||
1435 | usb_init_data(imx_usb); | |
1436 | imx_udc_init(imx_usb); | |
1437 | ||
1438 | return 0; | |
1439 | ||
1440 | fail3: | |
1441 | clk_put(clk); | |
1442 | clk_disable(clk); | |
1443 | fail2: | |
1444 | iounmap(base); | |
1445 | fail1: | |
1446 | if (pdata->exit) | |
1447 | pdata->exit(&pdev->dev); | |
1448 | fail0: | |
1449 | release_mem_region(res->start, res_size); | |
1450 | return ret; | |
1451 | } | |
1452 | ||
1453 | static int __exit imx_udc_remove(struct platform_device *pdev) | |
1454 | { | |
1455 | struct imx_udc_struct *imx_usb = platform_get_drvdata(pdev); | |
1456 | struct imxusb_platform_data *pdata = pdev->dev.platform_data; | |
1457 | int i; | |
1458 | ||
1459 | imx_udc_disable(imx_usb); | |
1460 | ||
1461 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) | |
1462 | free_irq(imx_usb->usbd_int[i], imx_usb); | |
1463 | ||
1464 | clk_put(imx_usb->clk); | |
1465 | clk_disable(imx_usb->clk); | |
1466 | iounmap(imx_usb->base); | |
1467 | ||
1468 | release_mem_region(imx_usb->res->start, | |
1469 | imx_usb->res->end - imx_usb->res->start + 1); | |
1470 | ||
1471 | if (pdata->exit) | |
1472 | pdata->exit(&pdev->dev); | |
1473 | ||
1474 | platform_set_drvdata(pdev, NULL); | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | /*----------------------------------------------------------------------------*/ | |
1480 | ||
1481 | #ifdef CONFIG_PM | |
1482 | #define imx_udc_suspend NULL | |
1483 | #define imx_udc_resume NULL | |
1484 | #else | |
1485 | #define imx_udc_suspend NULL | |
1486 | #define imx_udc_resume NULL | |
1487 | #endif | |
1488 | ||
1489 | /*----------------------------------------------------------------------------*/ | |
1490 | ||
1491 | static struct platform_driver udc_driver = { | |
1492 | .driver = { | |
1493 | .name = driver_name, | |
1494 | .owner = THIS_MODULE, | |
1495 | }, | |
1496 | .remove = __exit_p(imx_udc_remove), | |
1497 | .suspend = imx_udc_suspend, | |
1498 | .resume = imx_udc_resume, | |
1499 | }; | |
1500 | ||
1501 | static int __init udc_init(void) | |
1502 | { | |
1503 | return platform_driver_probe(&udc_driver, imx_udc_probe); | |
1504 | } | |
1505 | module_init(udc_init); | |
1506 | ||
1507 | static void __exit udc_exit(void) | |
1508 | { | |
1509 | platform_driver_unregister(&udc_driver); | |
1510 | } | |
1511 | module_exit(udc_exit); | |
1512 | ||
1513 | MODULE_DESCRIPTION("IMX USB Device Controller driver"); | |
1514 | MODULE_AUTHOR("Darius Augulis <augulis.darius@gmail.com>"); | |
1515 | MODULE_LICENSE("GPL"); | |
1516 | MODULE_ALIAS("platform:imx_udc"); |