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2a4f136f DA |
1 | /* |
2 | * driver/usb/gadget/imx_udc.c | |
3 | * | |
593bef6c | 4 | * Copyright (C) 2005 Mike Lee <eemike@gmail.com> |
2a4f136f DA |
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> | |
b633d28e | 31 | #include <linux/timer.h> |
2a4f136f DA |
32 | |
33 | #include <linux/usb/ch9.h> | |
34 | #include <linux/usb/gadget.h> | |
35 | ||
36 | #include <mach/usb.h> | |
37 | #include <mach/hardware.h> | |
38 | ||
39 | #include "imx_udc.h" | |
40 | ||
41 | static const char driver_name[] = "imx_udc"; | |
42 | static const char ep0name[] = "ep0"; | |
43 | ||
44 | void ep0_chg_stat(const char *label, struct imx_udc_struct *imx_usb, | |
45 | enum ep0_state stat); | |
46 | ||
47 | /******************************************************************************* | |
48 | * IMX UDC hardware related functions | |
49 | ******************************************************************************* | |
50 | */ | |
51 | ||
52 | void imx_udc_enable(struct imx_udc_struct *imx_usb) | |
53 | { | |
54 | int temp = __raw_readl(imx_usb->base + USB_CTRL); | |
593bef6c DA |
55 | __raw_writel(temp | CTRL_FE_ENA | CTRL_AFE_ENA, |
56 | imx_usb->base + USB_CTRL); | |
2a4f136f DA |
57 | imx_usb->gadget.speed = USB_SPEED_FULL; |
58 | } | |
59 | ||
60 | void imx_udc_disable(struct imx_udc_struct *imx_usb) | |
61 | { | |
62 | int temp = __raw_readl(imx_usb->base + USB_CTRL); | |
63 | ||
64 | __raw_writel(temp & ~(CTRL_FE_ENA | CTRL_AFE_ENA), | |
65 | imx_usb->base + USB_CTRL); | |
66 | ||
67 | ep0_chg_stat(__func__, imx_usb, EP0_IDLE); | |
68 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
69 | } | |
70 | ||
71 | void imx_udc_reset(struct imx_udc_struct *imx_usb) | |
72 | { | |
73 | int temp = __raw_readl(imx_usb->base + USB_ENAB); | |
74 | ||
75 | /* set RST bit */ | |
76 | __raw_writel(temp | ENAB_RST, imx_usb->base + USB_ENAB); | |
77 | ||
78 | /* wait RST bit to clear */ | |
79 | do {} while (__raw_readl(imx_usb->base + USB_ENAB) & ENAB_RST); | |
80 | ||
81 | /* wait CFG bit to assert */ | |
82 | do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG)); | |
83 | ||
84 | /* udc module is now ready */ | |
85 | } | |
86 | ||
87 | void imx_udc_config(struct imx_udc_struct *imx_usb) | |
88 | { | |
89 | u8 ep_conf[5]; | |
90 | u8 i, j, cfg; | |
91 | struct imx_ep_struct *imx_ep; | |
92 | ||
93 | /* wait CFG bit to assert */ | |
94 | do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG)); | |
95 | ||
96 | /* Download the endpoint buffer for endpoint 0. */ | |
97 | for (j = 0; j < 5; j++) { | |
98 | i = (j == 2 ? imx_usb->imx_ep[0].fifosize : 0x00); | |
99 | __raw_writeb(i, imx_usb->base + USB_DDAT); | |
100 | do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_BSY); | |
101 | } | |
102 | ||
103 | /* Download the endpoint buffers for endpoints 1-5. | |
104 | * We specify two configurations, one interface | |
105 | */ | |
106 | for (cfg = 1; cfg < 3; cfg++) { | |
107 | for (i = 1; i < IMX_USB_NB_EP; i++) { | |
108 | imx_ep = &imx_usb->imx_ep[i]; | |
109 | /* EP no | Config no */ | |
110 | ep_conf[0] = (i << 4) | (cfg << 2); | |
111 | /* Type | Direction */ | |
112 | ep_conf[1] = (imx_ep->bmAttributes << 3) | | |
113 | (EP_DIR(imx_ep) << 2); | |
114 | /* Max packet size */ | |
115 | ep_conf[2] = imx_ep->fifosize; | |
116 | /* TRXTYP */ | |
117 | ep_conf[3] = 0xC0; | |
118 | /* FIFO no */ | |
119 | ep_conf[4] = i; | |
120 | ||
121 | D_INI(imx_usb->dev, | |
122 | "<%s> ep%d_conf[%d]:" | |
123 | "[%02x-%02x-%02x-%02x-%02x]\n", | |
124 | __func__, i, cfg, | |
125 | ep_conf[0], ep_conf[1], ep_conf[2], | |
126 | ep_conf[3], ep_conf[4]); | |
127 | ||
128 | for (j = 0; j < 5; j++) { | |
129 | __raw_writeb(ep_conf[j], | |
130 | imx_usb->base + USB_DDAT); | |
593bef6c DA |
131 | do {} while (__raw_readl(imx_usb->base |
132 | + USB_DADR) | |
2a4f136f DA |
133 | & DADR_BSY); |
134 | } | |
135 | } | |
136 | } | |
137 | ||
138 | /* wait CFG bit to clear */ | |
139 | do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG); | |
140 | } | |
141 | ||
142 | void imx_udc_init_irq(struct imx_udc_struct *imx_usb) | |
143 | { | |
144 | int i; | |
145 | ||
146 | /* Mask and clear all irqs */ | |
147 | __raw_writel(0xFFFFFFFF, imx_usb->base + USB_MASK); | |
148 | __raw_writel(0xFFFFFFFF, imx_usb->base + USB_INTR); | |
149 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
150 | __raw_writel(0x1FF, imx_usb->base + USB_EP_MASK(i)); | |
151 | __raw_writel(0x1FF, imx_usb->base + USB_EP_INTR(i)); | |
152 | } | |
153 | ||
154 | /* Enable USB irqs */ | |
155 | __raw_writel(INTR_MSOF | INTR_FRAME_MATCH, imx_usb->base + USB_MASK); | |
156 | ||
157 | /* Enable EP0 irqs */ | |
158 | __raw_writel(0x1FF & ~(EPINTR_DEVREQ | EPINTR_MDEVREQ | EPINTR_EOT | |
159 | | EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL), | |
160 | imx_usb->base + USB_EP_MASK(0)); | |
161 | } | |
162 | ||
163 | void imx_udc_init_ep(struct imx_udc_struct *imx_usb) | |
164 | { | |
165 | int i, max, temp; | |
166 | struct imx_ep_struct *imx_ep; | |
167 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
168 | imx_ep = &imx_usb->imx_ep[i]; | |
169 | switch (imx_ep->fifosize) { | |
170 | case 8: | |
171 | max = 0; | |
172 | break; | |
173 | case 16: | |
174 | max = 1; | |
175 | break; | |
176 | case 32: | |
177 | max = 2; | |
178 | break; | |
179 | case 64: | |
180 | max = 3; | |
181 | break; | |
182 | default: | |
183 | max = 1; | |
184 | break; | |
185 | } | |
186 | temp = (EP_DIR(imx_ep) << 7) | (max << 5) | |
187 | | (imx_ep->bmAttributes << 3); | |
188 | __raw_writel(temp, imx_usb->base + USB_EP_STAT(i)); | |
593bef6c DA |
189 | __raw_writel(temp | EPSTAT_FLUSH, |
190 | imx_usb->base + USB_EP_STAT(i)); | |
2a4f136f DA |
191 | D_INI(imx_usb->dev, "<%s> ep%d_stat %08x\n", __func__, i, |
192 | __raw_readl(imx_usb->base + USB_EP_STAT(i))); | |
193 | } | |
194 | } | |
195 | ||
196 | void imx_udc_init_fifo(struct imx_udc_struct *imx_usb) | |
197 | { | |
198 | int i, temp; | |
199 | struct imx_ep_struct *imx_ep; | |
200 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
201 | imx_ep = &imx_usb->imx_ep[i]; | |
202 | ||
203 | /* Fifo control */ | |
204 | temp = EP_DIR(imx_ep) ? 0x0B000000 : 0x0F000000; | |
205 | __raw_writel(temp, imx_usb->base + USB_EP_FCTRL(i)); | |
206 | D_INI(imx_usb->dev, "<%s> ep%d_fctrl %08x\n", __func__, i, | |
207 | __raw_readl(imx_usb->base + USB_EP_FCTRL(i))); | |
208 | ||
209 | /* Fifo alarm */ | |
210 | temp = (i ? imx_ep->fifosize / 2 : 0); | |
211 | __raw_writel(temp, imx_usb->base + USB_EP_FALRM(i)); | |
212 | D_INI(imx_usb->dev, "<%s> ep%d_falrm %08x\n", __func__, i, | |
213 | __raw_readl(imx_usb->base + USB_EP_FALRM(i))); | |
214 | } | |
215 | } | |
216 | ||
217 | static void imx_udc_init(struct imx_udc_struct *imx_usb) | |
218 | { | |
219 | /* Reset UDC */ | |
220 | imx_udc_reset(imx_usb); | |
221 | ||
222 | /* Download config to enpoint buffer */ | |
223 | imx_udc_config(imx_usb); | |
224 | ||
225 | /* Setup interrups */ | |
226 | imx_udc_init_irq(imx_usb); | |
227 | ||
228 | /* Setup endpoints */ | |
229 | imx_udc_init_ep(imx_usb); | |
230 | ||
231 | /* Setup fifos */ | |
232 | imx_udc_init_fifo(imx_usb); | |
233 | } | |
234 | ||
235 | void imx_ep_irq_enable(struct imx_ep_struct *imx_ep) | |
236 | { | |
237 | ||
238 | int i = EP_NO(imx_ep); | |
239 | ||
240 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
241 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i)); | |
242 | __raw_writel(0x1FF & ~(EPINTR_EOT | EPINTR_EOF), | |
243 | imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
244 | } | |
245 | ||
246 | void imx_ep_irq_disable(struct imx_ep_struct *imx_ep) | |
247 | { | |
248 | ||
249 | int i = EP_NO(imx_ep); | |
250 | ||
251 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i)); | |
252 | __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i)); | |
253 | } | |
254 | ||
255 | int imx_ep_empty(struct imx_ep_struct *imx_ep) | |
256 | { | |
257 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
258 | ||
259 | return __raw_readl(imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep))) | |
260 | & FSTAT_EMPTY; | |
261 | } | |
262 | ||
263 | unsigned imx_fifo_bcount(struct imx_ep_struct *imx_ep) | |
264 | { | |
265 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
266 | ||
267 | return (__raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))) | |
268 | & EPSTAT_BCOUNT) >> 16; | |
269 | } | |
270 | ||
271 | void imx_flush(struct imx_ep_struct *imx_ep) | |
272 | { | |
273 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
274 | ||
275 | int temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
276 | __raw_writel(temp | EPSTAT_FLUSH, | |
277 | imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
278 | } | |
279 | ||
280 | void imx_ep_stall(struct imx_ep_struct *imx_ep) | |
281 | { | |
282 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
283 | int temp, i; | |
284 | ||
593bef6c DA |
285 | D_ERR(imx_usb->dev, |
286 | "<%s> Forced stall on %s\n", __func__, imx_ep->ep.name); | |
2a4f136f DA |
287 | |
288 | imx_flush(imx_ep); | |
289 | ||
290 | /* Special care for ep0 */ | |
8f182e5d | 291 | if (!EP_NO(imx_ep)) { |
2a4f136f | 292 | temp = __raw_readl(imx_usb->base + USB_CTRL); |
593bef6c DA |
293 | __raw_writel(temp | CTRL_CMDOVER | CTRL_CMDERROR, |
294 | imx_usb->base + USB_CTRL); | |
295 | do { } while (__raw_readl(imx_usb->base + USB_CTRL) | |
296 | & CTRL_CMDOVER); | |
2a4f136f DA |
297 | temp = __raw_readl(imx_usb->base + USB_CTRL); |
298 | __raw_writel(temp & ~CTRL_CMDERROR, imx_usb->base + USB_CTRL); | |
299 | } | |
300 | else { | |
301 | temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
302 | __raw_writel(temp | EPSTAT_STALL, | |
303 | imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); | |
304 | ||
305 | for (i = 0; i < 100; i ++) { | |
593bef6c DA |
306 | temp = __raw_readl(imx_usb->base |
307 | + USB_EP_STAT(EP_NO(imx_ep))); | |
0df24792 | 308 | if (!(temp & EPSTAT_STALL)) |
2a4f136f DA |
309 | break; |
310 | udelay(20); | |
311 | } | |
8f182e5d | 312 | if (i == 100) |
2a4f136f DA |
313 | D_ERR(imx_usb->dev, "<%s> Non finished stall on %s\n", |
314 | __func__, imx_ep->ep.name); | |
315 | } | |
316 | } | |
317 | ||
318 | static int imx_udc_get_frame(struct usb_gadget *_gadget) | |
319 | { | |
320 | struct imx_udc_struct *imx_usb = container_of(_gadget, | |
321 | struct imx_udc_struct, gadget); | |
322 | ||
323 | return __raw_readl(imx_usb->base + USB_FRAME) & 0x7FF; | |
324 | } | |
325 | ||
326 | static int imx_udc_wakeup(struct usb_gadget *_gadget) | |
327 | { | |
328 | return 0; | |
329 | } | |
330 | ||
331 | /******************************************************************************* | |
332 | * USB request control functions | |
333 | ******************************************************************************* | |
334 | */ | |
335 | ||
593bef6c DA |
336 | static void ep_add_request(struct imx_ep_struct *imx_ep, |
337 | struct imx_request *req) | |
2a4f136f DA |
338 | { |
339 | if (unlikely(!req)) | |
340 | return; | |
341 | ||
342 | req->in_use = 1; | |
343 | list_add_tail(&req->queue, &imx_ep->queue); | |
344 | } | |
345 | ||
593bef6c DA |
346 | static void ep_del_request(struct imx_ep_struct *imx_ep, |
347 | struct imx_request *req) | |
2a4f136f DA |
348 | { |
349 | if (unlikely(!req)) | |
350 | return; | |
351 | ||
352 | list_del_init(&req->queue); | |
353 | req->in_use = 0; | |
354 | } | |
355 | ||
593bef6c DA |
356 | static void done(struct imx_ep_struct *imx_ep, |
357 | struct imx_request *req, int status) | |
2a4f136f DA |
358 | { |
359 | ep_del_request(imx_ep, req); | |
360 | ||
361 | if (likely(req->req.status == -EINPROGRESS)) | |
362 | req->req.status = status; | |
363 | else | |
364 | status = req->req.status; | |
365 | ||
366 | if (status && status != -ESHUTDOWN) | |
367 | D_ERR(imx_ep->imx_usb->dev, | |
368 | "<%s> complete %s req %p stat %d len %u/%u\n", __func__, | |
369 | imx_ep->ep.name, &req->req, status, | |
370 | req->req.actual, req->req.length); | |
371 | ||
372 | req->req.complete(&imx_ep->ep, &req->req); | |
373 | } | |
374 | ||
375 | static void nuke(struct imx_ep_struct *imx_ep, int status) | |
376 | { | |
377 | struct imx_request *req; | |
378 | ||
379 | while (!list_empty(&imx_ep->queue)) { | |
380 | req = list_entry(imx_ep->queue.next, struct imx_request, queue); | |
381 | done(imx_ep, req, status); | |
382 | } | |
383 | } | |
384 | ||
385 | /******************************************************************************* | |
386 | * Data tansfer over USB functions | |
387 | ******************************************************************************* | |
388 | */ | |
389 | static int read_packet(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
390 | { | |
391 | u8 *buf; | |
392 | int bytes_ep, bufferspace, count, i; | |
393 | ||
394 | bytes_ep = imx_fifo_bcount(imx_ep); | |
395 | bufferspace = req->req.length - req->req.actual; | |
396 | ||
397 | buf = req->req.buf + req->req.actual; | |
398 | prefetchw(buf); | |
399 | ||
400 | if (unlikely(imx_ep_empty(imx_ep))) | |
401 | count = 0; /* zlp */ | |
402 | else | |
403 | count = min(bytes_ep, bufferspace); | |
404 | ||
405 | for (i = count; i > 0; i--) | |
406 | *buf++ = __raw_readb(imx_ep->imx_usb->base | |
407 | + USB_EP_FDAT0(EP_NO(imx_ep))); | |
408 | req->req.actual += count; | |
409 | ||
410 | return count; | |
411 | } | |
412 | ||
413 | static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
414 | { | |
415 | u8 *buf; | |
416 | int length, count, temp; | |
417 | ||
418 | buf = req->req.buf + req->req.actual; | |
419 | prefetch(buf); | |
420 | ||
421 | length = min(req->req.length - req->req.actual, (u32)imx_ep->fifosize); | |
422 | ||
423 | if (imx_fifo_bcount(imx_ep) + length > imx_ep->fifosize) { | |
424 | D_TRX(imx_ep->imx_usb->dev, "<%s> packet overfill %s fifo\n", | |
425 | __func__, imx_ep->ep.name); | |
426 | return -1; | |
427 | } | |
428 | ||
429 | req->req.actual += length; | |
430 | count = length; | |
431 | ||
432 | if (!count && req->req.zero) { /* zlp */ | |
433 | temp = __raw_readl(imx_ep->imx_usb->base | |
434 | + USB_EP_STAT(EP_NO(imx_ep))); | |
435 | __raw_writel(temp | EPSTAT_ZLPS, imx_ep->imx_usb->base | |
436 | + USB_EP_STAT(EP_NO(imx_ep))); | |
437 | D_TRX(imx_ep->imx_usb->dev, "<%s> zero packet\n", __func__); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | while (count--) { | |
442 | if (count == 0) { /* last byte */ | |
443 | temp = __raw_readl(imx_ep->imx_usb->base | |
444 | + USB_EP_FCTRL(EP_NO(imx_ep))); | |
445 | __raw_writel(temp | FCTRL_WFR, imx_ep->imx_usb->base | |
446 | + USB_EP_FCTRL(EP_NO(imx_ep))); | |
447 | } | |
448 | __raw_writeb(*buf++, | |
449 | imx_ep->imx_usb->base + USB_EP_FDAT0(EP_NO(imx_ep))); | |
450 | } | |
451 | ||
452 | return length; | |
453 | } | |
454 | ||
455 | static int read_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
456 | { | |
457 | int bytes = 0, | |
458 | count, | |
459 | completed = 0; | |
460 | ||
461 | while (__raw_readl(imx_ep->imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep))) | |
462 | & FSTAT_FR) { | |
463 | count = read_packet(imx_ep, req); | |
464 | bytes += count; | |
465 | ||
466 | completed = (count != imx_ep->fifosize); | |
467 | if (completed || req->req.actual == req->req.length) { | |
468 | completed = 1; | |
469 | break; | |
470 | } | |
471 | } | |
472 | ||
473 | if (completed || !req->req.length) { | |
474 | done(imx_ep, req, 0); | |
475 | D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n", | |
476 | __func__, imx_ep->ep.name, req, | |
477 | completed ? "completed" : "not completed"); | |
478 | if (!EP_NO(imx_ep)) | |
479 | ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE); | |
480 | } | |
481 | ||
482 | D_TRX(imx_ep->imx_usb->dev, "<%s> bytes read: %d\n", __func__, bytes); | |
483 | ||
484 | return completed; | |
485 | } | |
486 | ||
487 | static int write_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req) | |
488 | { | |
489 | int bytes = 0, | |
490 | count, | |
491 | completed = 0; | |
492 | ||
493 | while (!completed) { | |
494 | count = write_packet(imx_ep, req); | |
495 | if (count < 0) | |
496 | break; /* busy */ | |
497 | bytes += count; | |
498 | ||
499 | /* last packet "must be" short (or a zlp) */ | |
500 | completed = (count != imx_ep->fifosize); | |
501 | ||
502 | if (unlikely(completed)) { | |
503 | done(imx_ep, req, 0); | |
504 | D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n", | |
505 | __func__, imx_ep->ep.name, req, | |
506 | completed ? "completed" : "not completed"); | |
507 | if (!EP_NO(imx_ep)) | |
593bef6c DA |
508 | ep0_chg_stat(__func__, |
509 | imx_ep->imx_usb, EP0_IDLE); | |
2a4f136f DA |
510 | } |
511 | } | |
512 | ||
513 | D_TRX(imx_ep->imx_usb->dev, "<%s> bytes sent: %d\n", __func__, bytes); | |
514 | ||
515 | return completed; | |
516 | } | |
517 | ||
518 | /******************************************************************************* | |
519 | * Endpoint handlers | |
520 | ******************************************************************************* | |
521 | */ | |
522 | static int handle_ep(struct imx_ep_struct *imx_ep) | |
523 | { | |
524 | struct imx_request *req; | |
525 | int completed = 0; | |
526 | ||
527 | do { | |
528 | if (!list_empty(&imx_ep->queue)) | |
529 | req = list_entry(imx_ep->queue.next, | |
530 | struct imx_request, queue); | |
531 | else { | |
532 | D_REQ(imx_ep->imx_usb->dev, "<%s> no request on %s\n", | |
533 | __func__, imx_ep->ep.name); | |
534 | return 0; | |
535 | } | |
536 | ||
537 | if (EP_DIR(imx_ep)) /* to host */ | |
538 | completed = write_fifo(imx_ep, req); | |
539 | else /* to device */ | |
540 | completed = read_fifo(imx_ep, req); | |
541 | ||
542 | dump_ep_stat(__func__, imx_ep); | |
543 | ||
544 | } while (completed); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static int handle_ep0(struct imx_ep_struct *imx_ep) | |
550 | { | |
551 | struct imx_request *req = NULL; | |
552 | int ret = 0; | |
553 | ||
8f182e5d | 554 | if (!list_empty(&imx_ep->queue)) { |
2a4f136f DA |
555 | req = list_entry(imx_ep->queue.next, struct imx_request, queue); |
556 | ||
2a4f136f DA |
557 | switch (imx_ep->imx_usb->ep0state) { |
558 | ||
559 | case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR */ | |
560 | write_fifo(imx_ep, req); | |
561 | break; | |
562 | case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR */ | |
563 | read_fifo(imx_ep, req); | |
564 | break; | |
565 | default: | |
566 | D_EP0(imx_ep->imx_usb->dev, | |
567 | "<%s> ep0 i/o, odd state %d\n", | |
568 | __func__, imx_ep->imx_usb->ep0state); | |
569 | ep_del_request(imx_ep, req); | |
570 | ret = -EL2HLT; | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
8f182e5d DA |
575 | else |
576 | D_ERR(imx_ep->imx_usb->dev, "<%s> no request on %s\n", | |
577 | __func__, imx_ep->ep.name); | |
578 | ||
2a4f136f DA |
579 | return ret; |
580 | } | |
581 | ||
582 | static void handle_ep0_devreq(struct imx_udc_struct *imx_usb) | |
583 | { | |
584 | struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0]; | |
585 | union { | |
586 | struct usb_ctrlrequest r; | |
587 | u8 raw[8]; | |
588 | u32 word[2]; | |
589 | } u; | |
590 | int temp, i; | |
591 | ||
592 | nuke(imx_ep, -EPROTO); | |
593 | ||
594 | /* read SETUP packet */ | |
595 | for (i = 0; i < 2; i++) { | |
596 | if (imx_ep_empty(imx_ep)) { | |
597 | D_ERR(imx_usb->dev, | |
598 | "<%s> no setup packet received\n", __func__); | |
599 | goto stall; | |
600 | } | |
593bef6c DA |
601 | u.word[i] = __raw_readl(imx_usb->base |
602 | + USB_EP_FDAT(EP_NO(imx_ep))); | |
2a4f136f DA |
603 | } |
604 | ||
605 | temp = imx_ep_empty(imx_ep); | |
606 | while (!imx_ep_empty(imx_ep)) { | |
607 | i = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep))); | |
608 | D_ERR(imx_usb->dev, | |
609 | "<%s> wrong to have extra bytes for setup : 0x%08x\n", | |
610 | __func__, i); | |
611 | } | |
612 | if (!temp) | |
613 | goto stall; | |
614 | ||
615 | le16_to_cpus(&u.r.wValue); | |
616 | le16_to_cpus(&u.r.wIndex); | |
617 | le16_to_cpus(&u.r.wLength); | |
618 | ||
619 | D_REQ(imx_usb->dev, "<%s> SETUP %02x.%02x v%04x i%04x l%04x\n", | |
620 | __func__, u.r.bRequestType, u.r.bRequest, | |
621 | u.r.wValue, u.r.wIndex, u.r.wLength); | |
622 | ||
623 | if (imx_usb->set_config) { | |
624 | /* NACK the host by using CMDOVER */ | |
625 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
626 | __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL); | |
627 | ||
628 | D_ERR(imx_usb->dev, | |
629 | "<%s> set config req is pending, NACK the host\n", | |
630 | __func__); | |
631 | return; | |
632 | } | |
633 | ||
634 | if (u.r.bRequestType & USB_DIR_IN) | |
635 | ep0_chg_stat(__func__, imx_usb, EP0_IN_DATA_PHASE); | |
636 | else | |
637 | ep0_chg_stat(__func__, imx_usb, EP0_OUT_DATA_PHASE); | |
638 | ||
639 | i = imx_usb->driver->setup(&imx_usb->gadget, &u.r); | |
640 | if (i < 0) { | |
641 | D_ERR(imx_usb->dev, "<%s> device setup error %d\n", | |
642 | __func__, i); | |
643 | goto stall; | |
644 | } | |
645 | ||
646 | return; | |
647 | stall: | |
648 | D_ERR(imx_usb->dev, "<%s> protocol STALL\n", __func__); | |
649 | imx_ep_stall(imx_ep); | |
650 | ep0_chg_stat(__func__, imx_usb, EP0_STALL); | |
651 | return; | |
652 | } | |
653 | ||
654 | /******************************************************************************* | |
655 | * USB gadget callback functions | |
656 | ******************************************************************************* | |
657 | */ | |
658 | ||
659 | static int imx_ep_enable(struct usb_ep *usb_ep, | |
660 | const struct usb_endpoint_descriptor *desc) | |
661 | { | |
662 | struct imx_ep_struct *imx_ep = container_of(usb_ep, | |
663 | struct imx_ep_struct, ep); | |
664 | struct imx_udc_struct *imx_usb = imx_ep->imx_usb; | |
665 | unsigned long flags; | |
666 | ||
667 | if (!usb_ep | |
668 | || !desc | |
669 | || !EP_NO(imx_ep) | |
670 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
671 | || imx_ep->bEndpointAddress != desc->bEndpointAddress) { | |
672 | D_ERR(imx_usb->dev, | |
673 | "<%s> bad ep or descriptor\n", __func__); | |
674 | return -EINVAL; | |
675 | } | |
676 | ||
677 | if (imx_ep->bmAttributes != desc->bmAttributes) { | |
678 | D_ERR(imx_usb->dev, | |
679 | "<%s> %s type mismatch\n", __func__, usb_ep->name); | |
680 | return -EINVAL; | |
681 | } | |
682 | ||
683 | if (imx_ep->fifosize < le16_to_cpu(desc->wMaxPacketSize)) { | |
684 | D_ERR(imx_usb->dev, | |
685 | "<%s> bad %s maxpacket\n", __func__, usb_ep->name); | |
686 | return -ERANGE; | |
687 | } | |
688 | ||
689 | if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { | |
690 | D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__); | |
691 | return -ESHUTDOWN; | |
692 | } | |
693 | ||
694 | local_irq_save(flags); | |
695 | ||
696 | imx_ep->stopped = 0; | |
697 | imx_flush(imx_ep); | |
698 | imx_ep_irq_enable(imx_ep); | |
699 | ||
700 | local_irq_restore(flags); | |
701 | ||
702 | D_EPX(imx_usb->dev, "<%s> ENABLED %s\n", __func__, usb_ep->name); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static int imx_ep_disable(struct usb_ep *usb_ep) | |
707 | { | |
708 | struct imx_ep_struct *imx_ep = container_of(usb_ep, | |
709 | struct imx_ep_struct, ep); | |
710 | unsigned long flags; | |
711 | ||
712 | if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { | |
713 | D_ERR(imx_ep->imx_usb->dev, "<%s> %s can not be disabled\n", | |
714 | __func__, usb_ep ? imx_ep->ep.name : NULL); | |
715 | return -EINVAL; | |
716 | } | |
717 | ||
718 | local_irq_save(flags); | |
719 | ||
720 | imx_ep->stopped = 1; | |
721 | nuke(imx_ep, -ESHUTDOWN); | |
722 | imx_flush(imx_ep); | |
723 | imx_ep_irq_disable(imx_ep); | |
724 | ||
725 | local_irq_restore(flags); | |
726 | ||
727 | D_EPX(imx_ep->imx_usb->dev, | |
728 | "<%s> DISABLED %s\n", __func__, usb_ep->name); | |
729 | return 0; | |
730 | } | |
731 | ||
732 | static struct usb_request *imx_ep_alloc_request | |
733 | (struct usb_ep *usb_ep, gfp_t gfp_flags) | |
734 | { | |
735 | struct imx_request *req; | |
736 | ||
737 | req = kzalloc(sizeof *req, gfp_flags); | |
738 | if (!req || !usb_ep) | |
739 | return 0; | |
740 | ||
741 | INIT_LIST_HEAD(&req->queue); | |
742 | req->in_use = 0; | |
743 | ||
744 | return &req->req; | |
745 | } | |
746 | ||
747 | static void imx_ep_free_request | |
748 | (struct usb_ep *usb_ep, struct usb_request *usb_req) | |
749 | { | |
750 | struct imx_request *req; | |
751 | ||
752 | req = container_of(usb_req, struct imx_request, req); | |
753 | WARN_ON(!list_empty(&req->queue)); | |
754 | kfree(req); | |
755 | } | |
756 | ||
757 | static int imx_ep_queue | |
758 | (struct usb_ep *usb_ep, struct usb_request *usb_req, gfp_t gfp_flags) | |
759 | { | |
760 | struct imx_ep_struct *imx_ep; | |
761 | struct imx_udc_struct *imx_usb; | |
762 | struct imx_request *req; | |
763 | unsigned long flags; | |
764 | int ret = 0; | |
765 | ||
766 | imx_ep = container_of(usb_ep, struct imx_ep_struct, ep); | |
767 | imx_usb = imx_ep->imx_usb; | |
768 | req = container_of(usb_req, struct imx_request, req); | |
769 | ||
770 | /* | |
771 | Special care on IMX udc. | |
772 | Ignore enqueue when after set configuration from the | |
773 | host. This assume all gadget drivers reply set | |
774 | configuration with the next ep0 req enqueue. | |
775 | */ | |
776 | if (imx_usb->set_config && !EP_NO(imx_ep)) { | |
777 | imx_usb->set_config = 0; | |
8f182e5d | 778 | D_ERR(imx_usb->dev, |
2a4f136f DA |
779 | "<%s> gadget reply set config\n", __func__); |
780 | return 0; | |
781 | } | |
782 | ||
783 | if (unlikely(!usb_req || !req || !usb_req->complete || !usb_req->buf)) { | |
784 | D_ERR(imx_usb->dev, "<%s> bad params\n", __func__); | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
788 | if (unlikely(!usb_ep || !imx_ep)) { | |
789 | D_ERR(imx_usb->dev, "<%s> bad ep\n", __func__); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { | |
794 | D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__); | |
795 | return -ESHUTDOWN; | |
796 | } | |
797 | ||
2a4f136f DA |
798 | /* Debug */ |
799 | D_REQ(imx_usb->dev, "<%s> ep%d %s request for [%d] bytes\n", | |
800 | __func__, EP_NO(imx_ep), | |
593bef6c DA |
801 | ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state |
802 | == EP0_IN_DATA_PHASE) | |
803 | || (EP_NO(imx_ep) && EP_DIR(imx_ep))) | |
804 | ? "IN" : "OUT", usb_req->length); | |
2a4f136f DA |
805 | dump_req(__func__, imx_ep, usb_req); |
806 | ||
807 | if (imx_ep->stopped) { | |
808 | usb_req->status = -ESHUTDOWN; | |
8f182e5d | 809 | return -ESHUTDOWN; |
2a4f136f DA |
810 | } |
811 | ||
812 | if (req->in_use) { | |
813 | D_ERR(imx_usb->dev, | |
814 | "<%s> refusing to queue req %p (already queued)\n", | |
815 | __func__, req); | |
8f182e5d | 816 | return 0; |
2a4f136f DA |
817 | } |
818 | ||
8f182e5d DA |
819 | local_irq_save(flags); |
820 | ||
2a4f136f DA |
821 | usb_req->status = -EINPROGRESS; |
822 | usb_req->actual = 0; | |
823 | ||
824 | ep_add_request(imx_ep, req); | |
825 | ||
826 | if (!EP_NO(imx_ep)) | |
827 | ret = handle_ep0(imx_ep); | |
828 | else | |
829 | ret = handle_ep(imx_ep); | |
8f182e5d | 830 | |
2a4f136f DA |
831 | local_irq_restore(flags); |
832 | return ret; | |
833 | } | |
834 | ||
835 | static int imx_ep_dequeue(struct usb_ep *usb_ep, struct usb_request *usb_req) | |
836 | { | |
837 | ||
838 | struct imx_ep_struct *imx_ep = container_of | |
839 | (usb_ep, struct imx_ep_struct, ep); | |
840 | struct imx_request *req; | |
841 | unsigned long flags; | |
842 | ||
843 | if (unlikely(!usb_ep || !EP_NO(imx_ep))) { | |
844 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
845 | return -EINVAL; | |
846 | } | |
847 | ||
848 | local_irq_save(flags); | |
849 | ||
850 | /* make sure it's actually queued on this endpoint */ | |
851 | list_for_each_entry(req, &imx_ep->queue, queue) { | |
852 | if (&req->req == usb_req) | |
853 | break; | |
854 | } | |
855 | if (&req->req != usb_req) { | |
856 | local_irq_restore(flags); | |
857 | return -EINVAL; | |
858 | } | |
859 | ||
860 | done(imx_ep, req, -ECONNRESET); | |
861 | ||
862 | local_irq_restore(flags); | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static int imx_ep_set_halt(struct usb_ep *usb_ep, int value) | |
867 | { | |
868 | struct imx_ep_struct *imx_ep = container_of | |
869 | (usb_ep, struct imx_ep_struct, ep); | |
870 | unsigned long flags; | |
871 | ||
872 | if (unlikely(!usb_ep || !EP_NO(imx_ep))) { | |
873 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
874 | return -EINVAL; | |
875 | } | |
876 | ||
877 | local_irq_save(flags); | |
878 | ||
879 | if ((imx_ep->bEndpointAddress & USB_DIR_IN) | |
880 | && !list_empty(&imx_ep->queue)) { | |
881 | local_irq_restore(flags); | |
882 | return -EAGAIN; | |
883 | } | |
884 | ||
885 | imx_ep_stall(imx_ep); | |
886 | ||
887 | local_irq_restore(flags); | |
888 | ||
889 | D_EPX(imx_ep->imx_usb->dev, "<%s> %s halt\n", __func__, usb_ep->name); | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static int imx_ep_fifo_status(struct usb_ep *usb_ep) | |
894 | { | |
895 | struct imx_ep_struct *imx_ep = container_of | |
896 | (usb_ep, struct imx_ep_struct, ep); | |
897 | ||
898 | if (!usb_ep) { | |
899 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
900 | return -ENODEV; | |
901 | } | |
902 | ||
903 | if (imx_ep->imx_usb->gadget.speed == USB_SPEED_UNKNOWN) | |
904 | return 0; | |
905 | else | |
906 | return imx_fifo_bcount(imx_ep); | |
907 | } | |
908 | ||
909 | static void imx_ep_fifo_flush(struct usb_ep *usb_ep) | |
910 | { | |
911 | struct imx_ep_struct *imx_ep = container_of | |
912 | (usb_ep, struct imx_ep_struct, ep); | |
913 | unsigned long flags; | |
914 | ||
915 | local_irq_save(flags); | |
916 | ||
917 | if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { | |
918 | D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); | |
919 | local_irq_restore(flags); | |
920 | return; | |
921 | } | |
922 | ||
923 | /* toggle and halt bits stay unchanged */ | |
924 | imx_flush(imx_ep); | |
925 | ||
926 | local_irq_restore(flags); | |
927 | } | |
928 | ||
929 | static struct usb_ep_ops imx_ep_ops = { | |
930 | .enable = imx_ep_enable, | |
931 | .disable = imx_ep_disable, | |
932 | ||
933 | .alloc_request = imx_ep_alloc_request, | |
934 | .free_request = imx_ep_free_request, | |
935 | ||
936 | .queue = imx_ep_queue, | |
937 | .dequeue = imx_ep_dequeue, | |
938 | ||
939 | .set_halt = imx_ep_set_halt, | |
940 | .fifo_status = imx_ep_fifo_status, | |
941 | .fifo_flush = imx_ep_fifo_flush, | |
942 | }; | |
943 | ||
944 | /******************************************************************************* | |
945 | * USB endpoint control functions | |
946 | ******************************************************************************* | |
947 | */ | |
948 | ||
949 | void ep0_chg_stat(const char *label, | |
950 | struct imx_udc_struct *imx_usb, enum ep0_state stat) | |
951 | { | |
952 | D_EP0(imx_usb->dev, "<%s> from %15s to %15s\n", | |
953 | label, state_name[imx_usb->ep0state], state_name[stat]); | |
954 | ||
955 | if (imx_usb->ep0state == stat) | |
956 | return; | |
957 | ||
958 | imx_usb->ep0state = stat; | |
959 | } | |
960 | ||
961 | static void usb_init_data(struct imx_udc_struct *imx_usb) | |
962 | { | |
963 | struct imx_ep_struct *imx_ep; | |
964 | u8 i; | |
965 | ||
966 | /* device/ep0 records init */ | |
967 | INIT_LIST_HEAD(&imx_usb->gadget.ep_list); | |
968 | INIT_LIST_HEAD(&imx_usb->gadget.ep0->ep_list); | |
969 | ep0_chg_stat(__func__, imx_usb, EP0_IDLE); | |
970 | ||
971 | /* basic endpoint records init */ | |
972 | for (i = 0; i < IMX_USB_NB_EP; i++) { | |
973 | imx_ep = &imx_usb->imx_ep[i]; | |
974 | ||
975 | if (i) { | |
976 | list_add_tail(&imx_ep->ep.ep_list, | |
977 | &imx_usb->gadget.ep_list); | |
978 | imx_ep->stopped = 1; | |
979 | } else | |
980 | imx_ep->stopped = 0; | |
981 | ||
982 | INIT_LIST_HEAD(&imx_ep->queue); | |
983 | } | |
984 | } | |
985 | ||
986 | static void udc_stop_activity(struct imx_udc_struct *imx_usb, | |
987 | struct usb_gadget_driver *driver) | |
988 | { | |
989 | struct imx_ep_struct *imx_ep; | |
990 | int i; | |
991 | ||
992 | if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN) | |
993 | driver = NULL; | |
994 | ||
995 | /* prevent new request submissions, kill any outstanding requests */ | |
996 | for (i = 1; i < IMX_USB_NB_EP; i++) { | |
997 | imx_ep = &imx_usb->imx_ep[i]; | |
998 | imx_flush(imx_ep); | |
999 | imx_ep->stopped = 1; | |
1000 | imx_ep_irq_disable(imx_ep); | |
1001 | nuke(imx_ep, -ESHUTDOWN); | |
1002 | } | |
1003 | ||
1004 | imx_usb->cfg = 0; | |
1005 | imx_usb->intf = 0; | |
1006 | imx_usb->alt = 0; | |
1007 | ||
1008 | if (driver) | |
1009 | driver->disconnect(&imx_usb->gadget); | |
1010 | } | |
1011 | ||
1012 | /******************************************************************************* | |
1013 | * Interrupt handlers | |
1014 | ******************************************************************************* | |
1015 | */ | |
1016 | ||
b633d28e DA |
1017 | /* |
1018 | * Called when timer expires. | |
1019 | * Timer is started when CFG_CHG is received. | |
1020 | */ | |
1021 | static void handle_config(unsigned long data) | |
2a4f136f | 1022 | { |
b633d28e | 1023 | struct imx_udc_struct *imx_usb = (void *)data; |
2a4f136f DA |
1024 | struct usb_ctrlrequest u; |
1025 | int temp, cfg, intf, alt; | |
2a4f136f | 1026 | |
b633d28e | 1027 | local_irq_disable(); |
2a4f136f | 1028 | |
b633d28e DA |
1029 | temp = __raw_readl(imx_usb->base + USB_STAT); |
1030 | cfg = (temp & STAT_CFG) >> 5; | |
1031 | intf = (temp & STAT_INTF) >> 3; | |
1032 | alt = temp & STAT_ALTSET; | |
2a4f136f | 1033 | |
b633d28e DA |
1034 | D_REQ(imx_usb->dev, |
1035 | "<%s> orig config C=%d, I=%d, A=%d / " | |
1036 | "req config C=%d, I=%d, A=%d\n", | |
1037 | __func__, imx_usb->cfg, imx_usb->intf, imx_usb->alt, | |
1038 | cfg, intf, alt); | |
2a4f136f | 1039 | |
b633d28e | 1040 | if (cfg == 1 || cfg == 2) { |
2a4f136f | 1041 | |
2a4f136f | 1042 | if (imx_usb->cfg != cfg) { |
2a4f136f DA |
1043 | u.bRequest = USB_REQ_SET_CONFIGURATION; |
1044 | u.bRequestType = USB_DIR_OUT | | |
1045 | USB_TYPE_STANDARD | | |
1046 | USB_RECIP_DEVICE; | |
1047 | u.wValue = cfg; | |
1048 | u.wIndex = 0; | |
1049 | u.wLength = 0; | |
1050 | imx_usb->cfg = cfg; | |
2a4f136f | 1051 | imx_usb->driver->setup(&imx_usb->gadget, &u); |
2a4f136f DA |
1052 | |
1053 | } | |
1054 | if (imx_usb->intf != intf || imx_usb->alt != alt) { | |
2a4f136f DA |
1055 | u.bRequest = USB_REQ_SET_INTERFACE; |
1056 | u.bRequestType = USB_DIR_OUT | | |
1057 | USB_TYPE_STANDARD | | |
1058 | USB_RECIP_INTERFACE; | |
1059 | u.wValue = alt; | |
1060 | u.wIndex = intf; | |
1061 | u.wLength = 0; | |
1062 | imx_usb->intf = intf; | |
1063 | imx_usb->alt = alt; | |
2a4f136f | 1064 | imx_usb->driver->setup(&imx_usb->gadget, &u); |
2a4f136f DA |
1065 | } |
1066 | } | |
1067 | ||
b633d28e DA |
1068 | imx_usb->set_config = 0; |
1069 | ||
1070 | local_irq_enable(); | |
1071 | } | |
1072 | ||
1073 | static irqreturn_t imx_udc_irq(int irq, void *dev) | |
1074 | { | |
1075 | struct imx_udc_struct *imx_usb = dev; | |
1076 | int intr = __raw_readl(imx_usb->base + USB_INTR); | |
1077 | int temp; | |
1078 | ||
1079 | if (intr & (INTR_WAKEUP | INTR_SUSPEND | INTR_RESUME | INTR_RESET_START | |
1080 | | INTR_RESET_STOP | INTR_CFG_CHG)) { | |
1081 | dump_intr(__func__, intr, imx_usb->dev); | |
1082 | dump_usb_stat(__func__, imx_usb); | |
1083 | } | |
1084 | ||
1085 | if (!imx_usb->driver) | |
1086 | goto end_irq; | |
1087 | ||
2a4f136f | 1088 | if (intr & INTR_SOF) { |
8f182e5d DA |
1089 | /* Copy from Freescale BSP. |
1090 | We must enable SOF intr and set CMDOVER. | |
1091 | Datasheet don't specifiy this action, but it | |
1092 | is done in Freescale BSP, so just copy it. | |
1093 | */ | |
2a4f136f DA |
1094 | if (imx_usb->ep0state == EP0_IDLE) { |
1095 | temp = __raw_readl(imx_usb->base + USB_CTRL); | |
593bef6c DA |
1096 | __raw_writel(temp | CTRL_CMDOVER, |
1097 | imx_usb->base + USB_CTRL); | |
2a4f136f DA |
1098 | } |
1099 | } | |
1100 | ||
b633d28e DA |
1101 | if (intr & INTR_CFG_CHG) { |
1102 | /* A workaround of serious IMX UDC bug. | |
1103 | Handling of CFG_CHG should be delayed for some time, because | |
1104 | IMX does not NACK the host when CFG_CHG interrupt is pending. | |
1105 | There is no time to handle current CFG_CHG | |
1106 | if next CFG_CHG or SETUP packed is send immediately. | |
1107 | We have to clear CFG_CHG, start the timer and | |
1108 | NACK the host by setting CTRL_CMDOVER | |
1109 | if it sends any SETUP packet. | |
1110 | When timer expires, handler is called to handle configuration | |
1111 | changes. While CFG_CHG is not handled (set_config=1), | |
1112 | we must NACK the host to every SETUP packed. | |
1113 | This delay prevents from going out of sync with host. | |
1114 | */ | |
1115 | __raw_writel(INTR_CFG_CHG, imx_usb->base + USB_INTR); | |
1116 | imx_usb->set_config = 1; | |
1117 | mod_timer(&imx_usb->timer, jiffies + 5); | |
1118 | goto end_irq; | |
1119 | } | |
1120 | ||
1121 | if (intr & INTR_WAKEUP) { | |
1122 | if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN | |
1123 | && imx_usb->driver && imx_usb->driver->resume) | |
1124 | imx_usb->driver->resume(&imx_usb->gadget); | |
1125 | imx_usb->set_config = 0; | |
1126 | del_timer(&imx_usb->timer); | |
1127 | imx_usb->gadget.speed = USB_SPEED_FULL; | |
1128 | } | |
1129 | ||
1130 | if (intr & INTR_SUSPEND) { | |
1131 | if (imx_usb->gadget.speed != USB_SPEED_UNKNOWN | |
1132 | && imx_usb->driver && imx_usb->driver->suspend) | |
1133 | imx_usb->driver->suspend(&imx_usb->gadget); | |
1134 | imx_usb->set_config = 0; | |
1135 | del_timer(&imx_usb->timer); | |
1136 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
1137 | } | |
1138 | ||
1139 | if (intr & INTR_RESET_START) { | |
1140 | __raw_writel(intr, imx_usb->base + USB_INTR); | |
1141 | udc_stop_activity(imx_usb, imx_usb->driver); | |
1142 | imx_usb->set_config = 0; | |
1143 | del_timer(&imx_usb->timer); | |
1144 | imx_usb->gadget.speed = USB_SPEED_UNKNOWN; | |
1145 | } | |
1146 | ||
1147 | if (intr & INTR_RESET_STOP) | |
1148 | imx_usb->gadget.speed = USB_SPEED_FULL; | |
1149 | ||
2a4f136f DA |
1150 | end_irq: |
1151 | __raw_writel(intr, imx_usb->base + USB_INTR); | |
1152 | return IRQ_HANDLED; | |
1153 | } | |
1154 | ||
1155 | static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev) | |
1156 | { | |
1157 | struct imx_udc_struct *imx_usb = dev; | |
d24921a3 | 1158 | struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0]; |
2a4f136f DA |
1159 | int intr = __raw_readl(imx_usb->base + USB_EP_INTR(0)); |
1160 | ||
1161 | dump_ep_intr(__func__, 0, intr, imx_usb->dev); | |
1162 | ||
1163 | if (!imx_usb->driver) { | |
1164 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); | |
1165 | return IRQ_HANDLED; | |
1166 | } | |
1167 | ||
d24921a3 | 1168 | /* DEVREQ has highest priority */ |
2a4f136f DA |
1169 | if (intr & (EPINTR_DEVREQ | EPINTR_MDEVREQ)) |
1170 | handle_ep0_devreq(imx_usb); | |
1171 | /* Seem i.MX is missing EOF interrupt sometimes. | |
d24921a3 DA |
1172 | * Therefore we don't monitor EOF. |
1173 | * We call handle_ep0() only if a request is queued for ep0. | |
2a4f136f | 1174 | */ |
d24921a3 DA |
1175 | else if (!list_empty(&imx_ep->queue)) |
1176 | handle_ep0(imx_ep); | |
2a4f136f DA |
1177 | |
1178 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); | |
1179 | ||
1180 | return IRQ_HANDLED; | |
1181 | } | |
1182 | ||
1183 | static irqreturn_t imx_udc_bulk_irq(int irq, void *dev) | |
1184 | { | |
1185 | struct imx_udc_struct *imx_usb = dev; | |
1186 | struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[irq - USBD_INT0]; | |
1187 | int intr = __raw_readl(imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1188 | ||
1189 | dump_ep_intr(__func__, irq - USBD_INT0, intr, imx_usb->dev); | |
1190 | ||
1191 | if (!imx_usb->driver) { | |
1192 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1193 | return IRQ_HANDLED; | |
1194 | } | |
1195 | ||
1196 | handle_ep(imx_ep); | |
1197 | ||
1198 | __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); | |
1199 | ||
1200 | return IRQ_HANDLED; | |
1201 | } | |
1202 | ||
1203 | irq_handler_t intr_handler(int i) | |
1204 | { | |
1205 | switch (i) { | |
1206 | case 0: | |
1207 | return imx_udc_ctrl_irq; | |
1208 | case 1: | |
1209 | case 2: | |
1210 | case 3: | |
1211 | case 4: | |
1212 | case 5: | |
1213 | return imx_udc_bulk_irq; | |
1214 | default: | |
1215 | return imx_udc_irq; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | /******************************************************************************* | |
1220 | * Static defined IMX UDC structure | |
1221 | ******************************************************************************* | |
1222 | */ | |
1223 | ||
1224 | static const struct usb_gadget_ops imx_udc_ops = { | |
1225 | .get_frame = imx_udc_get_frame, | |
1226 | .wakeup = imx_udc_wakeup, | |
1227 | }; | |
1228 | ||
1229 | static struct imx_udc_struct controller = { | |
1230 | .gadget = { | |
1231 | .ops = &imx_udc_ops, | |
1232 | .ep0 = &controller.imx_ep[0].ep, | |
1233 | .name = driver_name, | |
1234 | .dev = { | |
5df58524 KS |
1235 | .init_name = "gadget", |
1236 | }, | |
2a4f136f DA |
1237 | }, |
1238 | ||
1239 | .imx_ep[0] = { | |
1240 | .ep = { | |
1241 | .name = ep0name, | |
1242 | .ops = &imx_ep_ops, | |
1243 | .maxpacket = 32, | |
1244 | }, | |
1245 | .imx_usb = &controller, | |
1246 | .fifosize = 32, | |
1247 | .bEndpointAddress = 0, | |
1248 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
1249 | }, | |
1250 | .imx_ep[1] = { | |
1251 | .ep = { | |
1252 | .name = "ep1in-bulk", | |
1253 | .ops = &imx_ep_ops, | |
1254 | .maxpacket = 64, | |
1255 | }, | |
1256 | .imx_usb = &controller, | |
1257 | .fifosize = 64, | |
1258 | .bEndpointAddress = USB_DIR_IN | 1, | |
1259 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1260 | }, | |
1261 | .imx_ep[2] = { | |
1262 | .ep = { | |
1263 | .name = "ep2out-bulk", | |
1264 | .ops = &imx_ep_ops, | |
1265 | .maxpacket = 64, | |
1266 | }, | |
1267 | .imx_usb = &controller, | |
1268 | .fifosize = 64, | |
1269 | .bEndpointAddress = USB_DIR_OUT | 2, | |
1270 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1271 | }, | |
1272 | .imx_ep[3] = { | |
1273 | .ep = { | |
1274 | .name = "ep3out-bulk", | |
1275 | .ops = &imx_ep_ops, | |
1276 | .maxpacket = 32, | |
1277 | }, | |
1278 | .imx_usb = &controller, | |
1279 | .fifosize = 32, | |
1280 | .bEndpointAddress = USB_DIR_OUT | 3, | |
1281 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1282 | }, | |
1283 | .imx_ep[4] = { | |
1284 | .ep = { | |
1285 | .name = "ep4in-int", | |
1286 | .ops = &imx_ep_ops, | |
1287 | .maxpacket = 32, | |
1288 | }, | |
1289 | .imx_usb = &controller, | |
1290 | .fifosize = 32, | |
1291 | .bEndpointAddress = USB_DIR_IN | 4, | |
1292 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
1293 | }, | |
1294 | .imx_ep[5] = { | |
1295 | .ep = { | |
1296 | .name = "ep5out-int", | |
1297 | .ops = &imx_ep_ops, | |
1298 | .maxpacket = 32, | |
1299 | }, | |
1300 | .imx_usb = &controller, | |
1301 | .fifosize = 32, | |
1302 | .bEndpointAddress = USB_DIR_OUT | 5, | |
1303 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
1304 | }, | |
1305 | }; | |
1306 | ||
1307 | /******************************************************************************* | |
1308 | * USB gadged driver functions | |
1309 | ******************************************************************************* | |
1310 | */ | |
1311 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
1312 | { | |
1313 | struct imx_udc_struct *imx_usb = &controller; | |
1314 | int retval; | |
1315 | ||
1316 | if (!driver | |
1317 | || driver->speed < USB_SPEED_FULL | |
1318 | || !driver->bind | |
1319 | || !driver->disconnect | |
1320 | || !driver->setup) | |
1321 | return -EINVAL; | |
1322 | if (!imx_usb) | |
1323 | return -ENODEV; | |
1324 | if (imx_usb->driver) | |
1325 | return -EBUSY; | |
1326 | ||
1327 | /* first hook up the driver ... */ | |
1328 | imx_usb->driver = driver; | |
1329 | imx_usb->gadget.dev.driver = &driver->driver; | |
1330 | ||
1331 | retval = device_add(&imx_usb->gadget.dev); | |
1332 | if (retval) | |
1333 | goto fail; | |
1334 | retval = driver->bind(&imx_usb->gadget); | |
1335 | if (retval) { | |
1336 | D_ERR(imx_usb->dev, "<%s> bind to driver %s --> error %d\n", | |
1337 | __func__, driver->driver.name, retval); | |
1338 | device_del(&imx_usb->gadget.dev); | |
1339 | ||
1340 | goto fail; | |
1341 | } | |
1342 | ||
1343 | D_INI(imx_usb->dev, "<%s> registered gadget driver '%s'\n", | |
1344 | __func__, driver->driver.name); | |
1345 | ||
1346 | imx_udc_enable(imx_usb); | |
1347 | ||
1348 | return 0; | |
1349 | fail: | |
1350 | imx_usb->driver = NULL; | |
1351 | imx_usb->gadget.dev.driver = NULL; | |
1352 | return retval; | |
1353 | } | |
1354 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
1355 | ||
1356 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1357 | { | |
1358 | struct imx_udc_struct *imx_usb = &controller; | |
1359 | ||
1360 | if (!imx_usb) | |
1361 | return -ENODEV; | |
1362 | if (!driver || driver != imx_usb->driver || !driver->unbind) | |
1363 | return -EINVAL; | |
1364 | ||
1365 | udc_stop_activity(imx_usb, driver); | |
1366 | imx_udc_disable(imx_usb); | |
b633d28e | 1367 | del_timer(&imx_usb->timer); |
2a4f136f DA |
1368 | |
1369 | driver->unbind(&imx_usb->gadget); | |
1370 | imx_usb->gadget.dev.driver = NULL; | |
1371 | imx_usb->driver = NULL; | |
1372 | ||
1373 | device_del(&imx_usb->gadget.dev); | |
1374 | ||
1375 | D_INI(imx_usb->dev, "<%s> unregistered gadget driver '%s'\n", | |
1376 | __func__, driver->driver.name); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
1381 | ||
1382 | /******************************************************************************* | |
1383 | * Module functions | |
1384 | ******************************************************************************* | |
1385 | */ | |
1386 | ||
1387 | static int __init imx_udc_probe(struct platform_device *pdev) | |
1388 | { | |
1389 | struct imx_udc_struct *imx_usb = &controller; | |
1390 | struct resource *res; | |
1391 | struct imxusb_platform_data *pdata; | |
1392 | struct clk *clk; | |
1393 | void __iomem *base; | |
1394 | int ret = 0; | |
1395 | int i, res_size; | |
1396 | ||
1397 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1398 | if (!res) { | |
1399 | dev_err(&pdev->dev, "can't get device resources\n"); | |
1400 | return -ENODEV; | |
1401 | } | |
1402 | ||
1403 | pdata = pdev->dev.platform_data; | |
1404 | if (!pdata) { | |
1405 | dev_err(&pdev->dev, "driver needs platform data\n"); | |
1406 | return -ENODEV; | |
1407 | } | |
1408 | ||
1409 | res_size = res->end - res->start + 1; | |
1410 | if (!request_mem_region(res->start, res_size, res->name)) { | |
1411 | dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n", | |
1412 | res_size, res->start); | |
1413 | return -ENOMEM; | |
1414 | } | |
1415 | ||
1416 | if (pdata->init) { | |
1417 | ret = pdata->init(&pdev->dev); | |
1418 | if (ret) | |
1419 | goto fail0; | |
1420 | } | |
1421 | ||
1422 | base = ioremap(res->start, res_size); | |
1423 | if (!base) { | |
1424 | dev_err(&pdev->dev, "ioremap failed\n"); | |
1425 | ret = -EIO; | |
1426 | goto fail1; | |
1427 | } | |
1428 | ||
1429 | clk = clk_get(NULL, "usbd_clk"); | |
1430 | if (IS_ERR(clk)) { | |
1431 | ret = PTR_ERR(clk); | |
1432 | dev_err(&pdev->dev, "can't get USB clock\n"); | |
1433 | goto fail2; | |
1434 | } | |
1435 | clk_enable(clk); | |
1436 | ||
1437 | if (clk_get_rate(clk) != 48000000) { | |
1438 | D_INI(&pdev->dev, | |
1439 | "Bad USB clock (%d Hz), changing to 48000000 Hz\n", | |
1440 | (int)clk_get_rate(clk)); | |
1441 | if (clk_set_rate(clk, 48000000)) { | |
1442 | dev_err(&pdev->dev, | |
1443 | "Unable to set correct USB clock (48MHz)\n"); | |
1444 | ret = -EIO; | |
1445 | goto fail3; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) { | |
1450 | imx_usb->usbd_int[i] = platform_get_irq(pdev, i); | |
1451 | if (imx_usb->usbd_int[i] < 0) { | |
1452 | dev_err(&pdev->dev, "can't get irq number\n"); | |
1453 | ret = -ENODEV; | |
1454 | goto fail3; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) { | |
1459 | ret = request_irq(imx_usb->usbd_int[i], intr_handler(i), | |
1460 | IRQF_DISABLED, driver_name, imx_usb); | |
1461 | if (ret) { | |
1462 | dev_err(&pdev->dev, "can't get irq %i, err %d\n", | |
1463 | imx_usb->usbd_int[i], ret); | |
1464 | for (--i; i >= 0; i--) | |
1465 | free_irq(imx_usb->usbd_int[i], imx_usb); | |
1466 | goto fail3; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | imx_usb->res = res; | |
1471 | imx_usb->base = base; | |
1472 | imx_usb->clk = clk; | |
1473 | imx_usb->dev = &pdev->dev; | |
1474 | ||
1475 | device_initialize(&imx_usb->gadget.dev); | |
1476 | ||
1477 | imx_usb->gadget.dev.parent = &pdev->dev; | |
1478 | imx_usb->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1479 | ||
1480 | platform_set_drvdata(pdev, imx_usb); | |
1481 | ||
1482 | usb_init_data(imx_usb); | |
1483 | imx_udc_init(imx_usb); | |
1484 | ||
b633d28e DA |
1485 | init_timer(&imx_usb->timer); |
1486 | imx_usb->timer.function = handle_config; | |
1487 | imx_usb->timer.data = (unsigned long)imx_usb; | |
1488 | ||
2a4f136f DA |
1489 | return 0; |
1490 | ||
1491 | fail3: | |
1492 | clk_put(clk); | |
1493 | clk_disable(clk); | |
1494 | fail2: | |
1495 | iounmap(base); | |
1496 | fail1: | |
1497 | if (pdata->exit) | |
1498 | pdata->exit(&pdev->dev); | |
1499 | fail0: | |
1500 | release_mem_region(res->start, res_size); | |
1501 | return ret; | |
1502 | } | |
1503 | ||
1504 | static int __exit imx_udc_remove(struct platform_device *pdev) | |
1505 | { | |
1506 | struct imx_udc_struct *imx_usb = platform_get_drvdata(pdev); | |
1507 | struct imxusb_platform_data *pdata = pdev->dev.platform_data; | |
1508 | int i; | |
1509 | ||
1510 | imx_udc_disable(imx_usb); | |
b633d28e | 1511 | del_timer(&imx_usb->timer); |
2a4f136f DA |
1512 | |
1513 | for (i = 0; i < IMX_USB_NB_EP + 1; i++) | |
1514 | free_irq(imx_usb->usbd_int[i], imx_usb); | |
1515 | ||
1516 | clk_put(imx_usb->clk); | |
1517 | clk_disable(imx_usb->clk); | |
1518 | iounmap(imx_usb->base); | |
1519 | ||
1520 | release_mem_region(imx_usb->res->start, | |
1521 | imx_usb->res->end - imx_usb->res->start + 1); | |
1522 | ||
1523 | if (pdata->exit) | |
1524 | pdata->exit(&pdev->dev); | |
1525 | ||
1526 | platform_set_drvdata(pdev, NULL); | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | /*----------------------------------------------------------------------------*/ | |
1532 | ||
1533 | #ifdef CONFIG_PM | |
1534 | #define imx_udc_suspend NULL | |
1535 | #define imx_udc_resume NULL | |
1536 | #else | |
1537 | #define imx_udc_suspend NULL | |
1538 | #define imx_udc_resume NULL | |
1539 | #endif | |
1540 | ||
1541 | /*----------------------------------------------------------------------------*/ | |
1542 | ||
1543 | static struct platform_driver udc_driver = { | |
1544 | .driver = { | |
1545 | .name = driver_name, | |
1546 | .owner = THIS_MODULE, | |
1547 | }, | |
1548 | .remove = __exit_p(imx_udc_remove), | |
1549 | .suspend = imx_udc_suspend, | |
1550 | .resume = imx_udc_resume, | |
1551 | }; | |
1552 | ||
1553 | static int __init udc_init(void) | |
1554 | { | |
1555 | return platform_driver_probe(&udc_driver, imx_udc_probe); | |
1556 | } | |
1557 | module_init(udc_init); | |
1558 | ||
1559 | static void __exit udc_exit(void) | |
1560 | { | |
1561 | platform_driver_unregister(&udc_driver); | |
1562 | } | |
1563 | module_exit(udc_exit); | |
1564 | ||
1565 | MODULE_DESCRIPTION("IMX USB Device Controller driver"); | |
1566 | MODULE_AUTHOR("Darius Augulis <augulis.darius@gmail.com>"); | |
1567 | MODULE_LICENSE("GPL"); | |
1568 | MODULE_ALIAS("platform:imx_udc"); |