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doc: Update rcu_assign_pointer() definition in whatisRCU.txt
[linux/fpc-iii.git] / drivers / usb / gadget / udc / m66592-udc.c
blob46ce7bc15f2b087b180d54eab2351f34aea79574
1 /*
2 * M66592 UDC (USB gadget)
3 *
4 * Copyright (C) 2006-2007 Renesas Solutions Corp.
5 *
6 * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 */
12
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/delay.h>
16 #include <linux/io.h>
17 #include <linux/platform_device.h>
18 #include <linux/slab.h>
19 #include <linux/err.h>
20 #include <linux/usb/ch9.h>
21 #include <linux/usb/gadget.h>
22
23 #include "m66592-udc.h"
24
25 MODULE_DESCRIPTION("M66592 USB gadget driver");
26 MODULE_LICENSE("GPL");
27 MODULE_AUTHOR("Yoshihiro Shimoda");
28 MODULE_ALIAS("platform:m66592_udc");
29
30 #define DRIVER_VERSION "21 July 2009"
31
32 static const char udc_name[] = "m66592_udc";
33 static const char *m66592_ep_name[] = {
34 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
35 };
36
37 static void disable_controller(struct m66592 *m66592);
38 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
39 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
40 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
41 gfp_t gfp_flags);
42
43 static void transfer_complete(struct m66592_ep *ep,
44 struct m66592_request *req, int status);
45
46 /*-------------------------------------------------------------------------*/
47 static inline u16 get_usb_speed(struct m66592 *m66592)
48 {
49 return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
50 }
51
52 static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
53 unsigned long reg)
54 {
55 u16 tmp;
56
57 tmp = m66592_read(m66592, M66592_INTENB0);
58 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
59 M66592_INTENB0);
60 m66592_bset(m66592, (1 << pipenum), reg);
61 m66592_write(m66592, tmp, M66592_INTENB0);
62 }
63
64 static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
65 unsigned long reg)
66 {
67 u16 tmp;
68
69 tmp = m66592_read(m66592, M66592_INTENB0);
70 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
71 M66592_INTENB0);
72 m66592_bclr(m66592, (1 << pipenum), reg);
73 m66592_write(m66592, tmp, M66592_INTENB0);
74 }
75
76 static void m66592_usb_connect(struct m66592 *m66592)
77 {
78 m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
79 m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
80 M66592_INTENB0);
81 m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
82
83 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
84 }
85
86 static void m66592_usb_disconnect(struct m66592 *m66592)
87 __releases(m66592->lock)
88 __acquires(m66592->lock)
89 {
90 m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
91 m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
92 M66592_INTENB0);
93 m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
94 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
95
96 m66592->gadget.speed = USB_SPEED_UNKNOWN;
97 spin_unlock(&m66592->lock);
98 m66592->driver->disconnect(&m66592->gadget);
99 spin_lock(&m66592->lock);
100
101 disable_controller(m66592);
102 INIT_LIST_HEAD(&m66592->ep[0].queue);
103 }
104
105 static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
106 {
107 u16 pid = 0;
108 unsigned long offset;
109
110 if (pipenum == 0)
111 pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
112 else if (pipenum < M66592_MAX_NUM_PIPE) {
113 offset = get_pipectr_addr(pipenum);
114 pid = m66592_read(m66592, offset) & M66592_PID;
115 } else
116 pr_err("unexpect pipe num (%d)\n", pipenum);
117
118 return pid;
119 }
120
121 static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
122 u16 pid)
123 {
124 unsigned long offset;
125
126 if (pipenum == 0)
127 m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
128 else if (pipenum < M66592_MAX_NUM_PIPE) {
129 offset = get_pipectr_addr(pipenum);
130 m66592_mdfy(m66592, pid, M66592_PID, offset);
131 } else
132 pr_err("unexpect pipe num (%d)\n", pipenum);
133 }
134
135 static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
136 {
137 control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
138 }
139
140 static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
141 {
142 control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
143 }
144
145 static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
146 {
147 control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
148 }
149
150 static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
151 {
152 u16 ret = 0;
153 unsigned long offset;
154
155 if (pipenum == 0)
156 ret = m66592_read(m66592, M66592_DCPCTR);
157 else if (pipenum < M66592_MAX_NUM_PIPE) {
158 offset = get_pipectr_addr(pipenum);
159 ret = m66592_read(m66592, offset);
160 } else
161 pr_err("unexpect pipe num (%d)\n", pipenum);
162
163 return ret;
164 }
165
166 static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
167 {
168 unsigned long offset;
169
170 pipe_stop(m66592, pipenum);
171
172 if (pipenum == 0)
173 m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
174 else if (pipenum < M66592_MAX_NUM_PIPE) {
175 offset = get_pipectr_addr(pipenum);
176 m66592_bset(m66592, M66592_SQCLR, offset);
177 } else
178 pr_err("unexpect pipe num(%d)\n", pipenum);
179 }
180
181 static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
182 {
183 u16 tmp;
184 int size;
185
186 if (pipenum == 0) {
187 tmp = m66592_read(m66592, M66592_DCPCFG);
188 if ((tmp & M66592_CNTMD) != 0)
189 size = 256;
190 else {
191 tmp = m66592_read(m66592, M66592_DCPMAXP);
192 size = tmp & M66592_MAXP;
193 }
194 } else {
195 m66592_write(m66592, pipenum, M66592_PIPESEL);
196 tmp = m66592_read(m66592, M66592_PIPECFG);
197 if ((tmp & M66592_CNTMD) != 0) {
198 tmp = m66592_read(m66592, M66592_PIPEBUF);
199 size = ((tmp >> 10) + 1) * 64;
200 } else {
201 tmp = m66592_read(m66592, M66592_PIPEMAXP);
202 size = tmp & M66592_MXPS;
203 }
204 }
205
206 return size;
207 }
208
209 static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
210 {
211 struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
212 unsigned short mbw;
213
214 if (ep->use_dma)
215 return;
216
217 m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);
218
219 ndelay(450);
220
221 if (m66592->pdata->on_chip)
222 mbw = M66592_MBW_32;
223 else
224 mbw = M66592_MBW_16;
225
226 m66592_bset(m66592, mbw, ep->fifosel);
227 }
228
229 static int pipe_buffer_setting(struct m66592 *m66592,
230 struct m66592_pipe_info *info)
231 {
232 u16 bufnum = 0, buf_bsize = 0;
233 u16 pipecfg = 0;
234
235 if (info->pipe == 0)
236 return -EINVAL;
237
238 m66592_write(m66592, info->pipe, M66592_PIPESEL);
239
240 if (info->dir_in)
241 pipecfg |= M66592_DIR;
242 pipecfg |= info->type;
243 pipecfg |= info->epnum;
244 switch (info->type) {
245 case M66592_INT:
246 bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
247 buf_bsize = 0;
248 break;
249 case M66592_BULK:
250 /* isochronous pipes may be used as bulk pipes */
251 if (info->pipe >= M66592_BASE_PIPENUM_BULK)
252 bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
253 else
254 bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;
255
256 bufnum = M66592_BASE_BUFNUM + (bufnum * 16);
257 buf_bsize = 7;
258 pipecfg |= M66592_DBLB;
259 if (!info->dir_in)
260 pipecfg |= M66592_SHTNAK;
261 break;
262 case M66592_ISO:
263 bufnum = M66592_BASE_BUFNUM +
264 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
265 buf_bsize = 7;
266 break;
267 }
268
269 if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) {
270 pr_err("m66592 pipe memory is insufficient\n");
271 return -ENOMEM;
272 }
273
274 m66592_write(m66592, pipecfg, M66592_PIPECFG);
275 m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
276 m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
277 if (info->interval)
278 info->interval--;
279 m66592_write(m66592, info->interval, M66592_PIPEPERI);
280
281 return 0;
282 }
283
284 static void pipe_buffer_release(struct m66592 *m66592,
285 struct m66592_pipe_info *info)
286 {
287 if (info->pipe == 0)
288 return;
289
290 if (is_bulk_pipe(info->pipe)) {
291 m66592->bulk--;
292 } else if (is_interrupt_pipe(info->pipe))
293 m66592->interrupt--;
294 else if (is_isoc_pipe(info->pipe)) {
295 m66592->isochronous--;
296 if (info->type == M66592_BULK)
297 m66592->bulk--;
298 } else
299 pr_err("ep_release: unexpect pipenum (%d)\n",
300 info->pipe);
301 }
302
303 static void pipe_initialize(struct m66592_ep *ep)
304 {
305 struct m66592 *m66592 = ep->m66592;
306 unsigned short mbw;
307
308 m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
309
310 m66592_write(m66592, M66592_ACLRM, ep->pipectr);
311 m66592_write(m66592, 0, ep->pipectr);
312 m66592_write(m66592, M66592_SQCLR, ep->pipectr);
313 if (ep->use_dma) {
314 m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);
315
316 ndelay(450);
317
318 if (m66592->pdata->on_chip)
319 mbw = M66592_MBW_32;
320 else
321 mbw = M66592_MBW_16;
322
323 m66592_bset(m66592, mbw, ep->fifosel);
324 }
325 }
326
327 static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
328 const struct usb_endpoint_descriptor *desc,
329 u16 pipenum, int dma)
330 {
331 if ((pipenum != 0) && dma) {
332 if (m66592->num_dma == 0) {
333 m66592->num_dma++;
334 ep->use_dma = 1;
335 ep->fifoaddr = M66592_D0FIFO;
336 ep->fifosel = M66592_D0FIFOSEL;
337 ep->fifoctr = M66592_D0FIFOCTR;
338 ep->fifotrn = M66592_D0FIFOTRN;
339 } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
340 m66592->num_dma++;
341 ep->use_dma = 1;
342 ep->fifoaddr = M66592_D1FIFO;
343 ep->fifosel = M66592_D1FIFOSEL;
344 ep->fifoctr = M66592_D1FIFOCTR;
345 ep->fifotrn = M66592_D1FIFOTRN;
346 } else {
347 ep->use_dma = 0;
348 ep->fifoaddr = M66592_CFIFO;
349 ep->fifosel = M66592_CFIFOSEL;
350 ep->fifoctr = M66592_CFIFOCTR;
351 ep->fifotrn = 0;
352 }
353 } else {
354 ep->use_dma = 0;
355 ep->fifoaddr = M66592_CFIFO;
356 ep->fifosel = M66592_CFIFOSEL;
357 ep->fifoctr = M66592_CFIFOCTR;
358 ep->fifotrn = 0;
359 }
360
361 ep->pipectr = get_pipectr_addr(pipenum);
362 ep->pipenum = pipenum;
363 ep->ep.maxpacket = usb_endpoint_maxp(desc);
364 m66592->pipenum2ep[pipenum] = ep;
365 m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
366 INIT_LIST_HEAD(&ep->queue);
367 }
368
369 static void m66592_ep_release(struct m66592_ep *ep)
370 {
371 struct m66592 *m66592 = ep->m66592;
372 u16 pipenum = ep->pipenum;
373
374 if (pipenum == 0)
375 return;
376
377 if (ep->use_dma)
378 m66592->num_dma--;
379 ep->pipenum = 0;
380 ep->busy = 0;
381 ep->use_dma = 0;
382 }
383
384 static int alloc_pipe_config(struct m66592_ep *ep,
385 const struct usb_endpoint_descriptor *desc)
386 {
387 struct m66592 *m66592 = ep->m66592;
388 struct m66592_pipe_info info;
389 int dma = 0;
390 int *counter;
391 int ret;
392
393 ep->ep.desc = desc;
394
395 BUG_ON(ep->pipenum);
396
397 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
398 case USB_ENDPOINT_XFER_BULK:
399 if (m66592->bulk >= M66592_MAX_NUM_BULK) {
400 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
401 pr_err("bulk pipe is insufficient\n");
402 return -ENODEV;
403 } else {
404 info.pipe = M66592_BASE_PIPENUM_ISOC
405 + m66592->isochronous;
406 counter = &m66592->isochronous;
407 }
408 } else {
409 info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
410 counter = &m66592->bulk;
411 }
412 info.type = M66592_BULK;
413 dma = 1;
414 break;
415 case USB_ENDPOINT_XFER_INT:
416 if (m66592->interrupt >= M66592_MAX_NUM_INT) {
417 pr_err("interrupt pipe is insufficient\n");
418 return -ENODEV;
419 }
420 info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
421 info.type = M66592_INT;
422 counter = &m66592->interrupt;
423 break;
424 case USB_ENDPOINT_XFER_ISOC:
425 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
426 pr_err("isochronous pipe is insufficient\n");
427 return -ENODEV;
428 }
429 info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
430 info.type = M66592_ISO;
431 counter = &m66592->isochronous;
432 break;
433 default:
434 pr_err("unexpect xfer type\n");
435 return -EINVAL;
436 }
437 ep->type = info.type;
438
439 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
440 info.maxpacket = usb_endpoint_maxp(desc);
441 info.interval = desc->bInterval;
442 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
443 info.dir_in = 1;
444 else
445 info.dir_in = 0;
446
447 ret = pipe_buffer_setting(m66592, &info);
448 if (ret < 0) {
449 pr_err("pipe_buffer_setting fail\n");
450 return ret;
451 }
452
453 (*counter)++;
454 if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
455 m66592->bulk++;
456
457 m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
458 pipe_initialize(ep);
459
460 return 0;
461 }
462
463 static int free_pipe_config(struct m66592_ep *ep)
464 {
465 struct m66592 *m66592 = ep->m66592;
466 struct m66592_pipe_info info;
467
468 info.pipe = ep->pipenum;
469 info.type = ep->type;
470 pipe_buffer_release(m66592, &info);
471 m66592_ep_release(ep);
472
473 return 0;
474 }
475
476 /*-------------------------------------------------------------------------*/
477 static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
478 {
479 enable_irq_ready(m66592, pipenum);
480 enable_irq_nrdy(m66592, pipenum);
481 }
482
483 static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
484 {
485 disable_irq_ready(m66592, pipenum);
486 disable_irq_nrdy(m66592, pipenum);
487 }
488
489 /* if complete is true, gadget driver complete function is not call */
490 static void control_end(struct m66592 *m66592, unsigned ccpl)
491 {
492 m66592->ep[0].internal_ccpl = ccpl;
493 pipe_start(m66592, 0);
494 m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
495 }
496
497 static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
498 {
499 struct m66592 *m66592 = ep->m66592;
500
501 pipe_change(m66592, ep->pipenum);
502 m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
503 (M66592_ISEL | M66592_CURPIPE),
504 M66592_CFIFOSEL);
505 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
506 if (req->req.length == 0) {
507 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
508 pipe_start(m66592, 0);
509 transfer_complete(ep, req, 0);
510 } else {
511 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
512 irq_ep0_write(ep, req);
513 }
514 }
515
516 static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
517 {
518 struct m66592 *m66592 = ep->m66592;
519 u16 tmp;
520
521 pipe_change(m66592, ep->pipenum);
522 disable_irq_empty(m66592, ep->pipenum);
523 pipe_start(m66592, ep->pipenum);
524
525 tmp = m66592_read(m66592, ep->fifoctr);
526 if (unlikely((tmp & M66592_FRDY) == 0))
527 pipe_irq_enable(m66592, ep->pipenum);
528 else
529 irq_packet_write(ep, req);
530 }
531
532 static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
533 {
534 struct m66592 *m66592 = ep->m66592;
535 u16 pipenum = ep->pipenum;
536
537 if (ep->pipenum == 0) {
538 m66592_mdfy(m66592, M66592_PIPE0,
539 (M66592_ISEL | M66592_CURPIPE),
540 M66592_CFIFOSEL);
541 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
542 pipe_start(m66592, pipenum);
543 pipe_irq_enable(m66592, pipenum);
544 } else {
545 if (ep->use_dma) {
546 m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
547 pipe_change(m66592, pipenum);
548 m66592_bset(m66592, M66592_TRENB, ep->fifosel);
549 m66592_write(m66592,
550 (req->req.length + ep->ep.maxpacket - 1)
551 / ep->ep.maxpacket,
552 ep->fifotrn);
553 }
554 pipe_start(m66592, pipenum); /* trigger once */
555 pipe_irq_enable(m66592, pipenum);
556 }
557 }
558
559 static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
560 {
561 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
562 start_packet_write(ep, req);
563 else
564 start_packet_read(ep, req);
565 }
566
567 static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
568 {
569 u16 ctsq;
570
571 ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;
572
573 switch (ctsq) {
574 case M66592_CS_RDDS:
575 start_ep0_write(ep, req);
576 break;
577 case M66592_CS_WRDS:
578 start_packet_read(ep, req);
579 break;
580
581 case M66592_CS_WRND:
582 control_end(ep->m66592, 0);
583 break;
584 default:
585 pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
586 break;
587 }
588 }
589
590 static void init_controller(struct m66592 *m66592)
591 {
592 unsigned int endian;
593
594 if (m66592->pdata->on_chip) {
595 if (m66592->pdata->endian)
596 endian = 0; /* big endian */
597 else
598 endian = M66592_LITTLE; /* little endian */
599
600 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
601 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
602 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
603 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
604
605 /* This is a workaound for SH7722 2nd cut */
606 m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
607 m66592_bset(m66592, 0x1000, M66592_TESTMODE);
608 m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
609
610 m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
611
612 m66592_write(m66592, 0, M66592_CFBCFG);
613 m66592_write(m66592, 0, M66592_D0FBCFG);
614 m66592_bset(m66592, endian, M66592_CFBCFG);
615 m66592_bset(m66592, endian, M66592_D0FBCFG);
616 } else {
617 unsigned int clock, vif, irq_sense;
618
619 if (m66592->pdata->endian)
620 endian = M66592_BIGEND; /* big endian */
621 else
622 endian = 0; /* little endian */
623
624 if (m66592->pdata->vif)
625 vif = M66592_LDRV; /* 3.3v */
626 else
627 vif = 0; /* 1.5v */
628
629 switch (m66592->pdata->xtal) {
630 case M66592_PLATDATA_XTAL_12MHZ:
631 clock = M66592_XTAL12;
632 break;
633 case M66592_PLATDATA_XTAL_24MHZ:
634 clock = M66592_XTAL24;
635 break;
636 case M66592_PLATDATA_XTAL_48MHZ:
637 clock = M66592_XTAL48;
638 break;
639 default:
640 pr_warn("m66592-udc: xtal configuration error\n");
641 clock = 0;
642 }
643
644 switch (m66592->irq_trigger) {
645 case IRQF_TRIGGER_LOW:
646 irq_sense = M66592_INTL;
647 break;
648 case IRQF_TRIGGER_FALLING:
649 irq_sense = 0;
650 break;
651 default:
652 pr_warn("m66592-udc: irq trigger config error\n");
653 irq_sense = 0;
654 }
655
656 m66592_bset(m66592,
657 (vif & M66592_LDRV) | (endian & M66592_BIGEND),
658 M66592_PINCFG);
659 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
660 m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
661 M66592_SYSCFG);
662 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
663 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
664 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
665
666 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
667
668 msleep(3);
669
670 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
671
672 msleep(1);
673
674 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
675
676 m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
677 m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
678 M66592_DMA0CFG);
679 }
680 }
681
682 static void disable_controller(struct m66592 *m66592)
683 {
684 m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE);
685 if (!m66592->pdata->on_chip) {
686 m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
687 udelay(1);
688 m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
689 udelay(1);
690 m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
691 udelay(1);
692 m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
693 }
694 }
695
696 static void m66592_start_xclock(struct m66592 *m66592)
697 {
698 u16 tmp;
699
700 if (!m66592->pdata->on_chip) {
701 tmp = m66592_read(m66592, M66592_SYSCFG);
702 if (!(tmp & M66592_XCKE))
703 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
704 }
705 }
706
707 /*-------------------------------------------------------------------------*/
708 static void transfer_complete(struct m66592_ep *ep,
709 struct m66592_request *req, int status)
710 __releases(m66592->lock)
711 __acquires(m66592->lock)
712 {
713 int restart = 0;
714
715 if (unlikely(ep->pipenum == 0)) {
716 if (ep->internal_ccpl) {
717 ep->internal_ccpl = 0;
718 return;
719 }
720 }
721
722 list_del_init(&req->queue);
723 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
724 req->req.status = -ESHUTDOWN;
725 else
726 req->req.status = status;
727
728 if (!list_empty(&ep->queue))
729 restart = 1;
730
731 spin_unlock(&ep->m66592->lock);
732 usb_gadget_giveback_request(&ep->ep, &req->req);
733 spin_lock(&ep->m66592->lock);
734
735 if (restart) {
736 req = list_entry(ep->queue.next, struct m66592_request, queue);
737 if (ep->ep.desc)
738 start_packet(ep, req);
739 }
740 }
741
742 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
743 {
744 int i;
745 u16 tmp;
746 unsigned bufsize;
747 size_t size;
748 void *buf;
749 u16 pipenum = ep->pipenum;
750 struct m66592 *m66592 = ep->m66592;
751
752 pipe_change(m66592, pipenum);
753 m66592_bset(m66592, M66592_ISEL, ep->fifosel);
754
755 i = 0;
756 do {
757 tmp = m66592_read(m66592, ep->fifoctr);
758 if (i++ > 100000) {
759 pr_err("pipe0 is busy. maybe cpu i/o bus "
760 "conflict. please power off this controller.");
761 return;
762 }
763 ndelay(1);
764 } while ((tmp & M66592_FRDY) == 0);
765
766 /* prepare parameters */
767 bufsize = get_buffer_size(m66592, pipenum);
768 buf = req->req.buf + req->req.actual;
769 size = min(bufsize, req->req.length - req->req.actual);
770
771 /* write fifo */
772 if (req->req.buf) {
773 if (size > 0)
774 m66592_write_fifo(m66592, ep, buf, size);
775 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
776 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
777 }
778
779 /* update parameters */
780 req->req.actual += size;
781
782 /* check transfer finish */
783 if ((!req->req.zero && (req->req.actual == req->req.length))
784 || (size % ep->ep.maxpacket)
785 || (size == 0)) {
786 disable_irq_ready(m66592, pipenum);
787 disable_irq_empty(m66592, pipenum);
788 } else {
789 disable_irq_ready(m66592, pipenum);
790 enable_irq_empty(m66592, pipenum);
791 }
792 pipe_start(m66592, pipenum);
793 }
794
795 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
796 {
797 u16 tmp;
798 unsigned bufsize;
799 size_t size;
800 void *buf;
801 u16 pipenum = ep->pipenum;
802 struct m66592 *m66592 = ep->m66592;
803
804 pipe_change(m66592, pipenum);
805 tmp = m66592_read(m66592, ep->fifoctr);
806 if (unlikely((tmp & M66592_FRDY) == 0)) {
807 pipe_stop(m66592, pipenum);
808 pipe_irq_disable(m66592, pipenum);
809 pr_err("write fifo not ready. pipnum=%d\n", pipenum);
810 return;
811 }
812
813 /* prepare parameters */
814 bufsize = get_buffer_size(m66592, pipenum);
815 buf = req->req.buf + req->req.actual;
816 size = min(bufsize, req->req.length - req->req.actual);
817
818 /* write fifo */
819 if (req->req.buf) {
820 m66592_write_fifo(m66592, ep, buf, size);
821 if ((size == 0)
822 || ((size % ep->ep.maxpacket) != 0)
823 || ((bufsize != ep->ep.maxpacket)
824 && (bufsize > size)))
825 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
826 }
827
828 /* update parameters */
829 req->req.actual += size;
830 /* check transfer finish */
831 if ((!req->req.zero && (req->req.actual == req->req.length))
832 || (size % ep->ep.maxpacket)
833 || (size == 0)) {
834 disable_irq_ready(m66592, pipenum);
835 enable_irq_empty(m66592, pipenum);
836 } else {
837 disable_irq_empty(m66592, pipenum);
838 pipe_irq_enable(m66592, pipenum);
839 }
840 }
841
842 static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
843 {
844 u16 tmp;
845 int rcv_len, bufsize, req_len;
846 int size;
847 void *buf;
848 u16 pipenum = ep->pipenum;
849 struct m66592 *m66592 = ep->m66592;
850 int finish = 0;
851
852 pipe_change(m66592, pipenum);
853 tmp = m66592_read(m66592, ep->fifoctr);
854 if (unlikely((tmp & M66592_FRDY) == 0)) {
855 req->req.status = -EPIPE;
856 pipe_stop(m66592, pipenum);
857 pipe_irq_disable(m66592, pipenum);
858 pr_err("read fifo not ready");
859 return;
860 }
861
862 /* prepare parameters */
863 rcv_len = tmp & M66592_DTLN;
864 bufsize = get_buffer_size(m66592, pipenum);
865
866 buf = req->req.buf + req->req.actual;
867 req_len = req->req.length - req->req.actual;
868 if (rcv_len < bufsize)
869 size = min(rcv_len, req_len);
870 else
871 size = min(bufsize, req_len);
872
873 /* update parameters */
874 req->req.actual += size;
875
876 /* check transfer finish */
877 if ((!req->req.zero && (req->req.actual == req->req.length))
878 || (size % ep->ep.maxpacket)
879 || (size == 0)) {
880 pipe_stop(m66592, pipenum);
881 pipe_irq_disable(m66592, pipenum);
882 finish = 1;
883 }
884
885 /* read fifo */
886 if (req->req.buf) {
887 if (size == 0)
888 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
889 else
890 m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
891 }
892
893 if ((ep->pipenum != 0) && finish)
894 transfer_complete(ep, req, 0);
895 }
896
897 static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
898 {
899 u16 check;
900 u16 pipenum;
901 struct m66592_ep *ep;
902 struct m66592_request *req;
903
904 if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
905 m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
906 m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
907 M66592_CFIFOSEL);
908
909 ep = &m66592->ep[0];
910 req = list_entry(ep->queue.next, struct m66592_request, queue);
911 irq_packet_read(ep, req);
912 } else {
913 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
914 check = 1 << pipenum;
915 if ((status & check) && (enb & check)) {
916 m66592_write(m66592, ~check, M66592_BRDYSTS);
917 ep = m66592->pipenum2ep[pipenum];
918 req = list_entry(ep->queue.next,
919 struct m66592_request, queue);
920 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
921 irq_packet_write(ep, req);
922 else
923 irq_packet_read(ep, req);
924 }
925 }
926 }
927 }
928
929 static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
930 {
931 u16 tmp;
932 u16 check;
933 u16 pipenum;
934 struct m66592_ep *ep;
935 struct m66592_request *req;
936
937 if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
938 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
939
940 ep = &m66592->ep[0];
941 req = list_entry(ep->queue.next, struct m66592_request, queue);
942 irq_ep0_write(ep, req);
943 } else {
944 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
945 check = 1 << pipenum;
946 if ((status & check) && (enb & check)) {
947 m66592_write(m66592, ~check, M66592_BEMPSTS);
948 tmp = control_reg_get(m66592, pipenum);
949 if ((tmp & M66592_INBUFM) == 0) {
950 disable_irq_empty(m66592, pipenum);
951 pipe_irq_disable(m66592, pipenum);
952 pipe_stop(m66592, pipenum);
953 ep = m66592->pipenum2ep[pipenum];
954 req = list_entry(ep->queue.next,
955 struct m66592_request,
956 queue);
957 if (!list_empty(&ep->queue))
958 transfer_complete(ep, req, 0);
959 }
960 }
961 }
962 }
963 }
964
965 static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
966 __releases(m66592->lock)
967 __acquires(m66592->lock)
968 {
969 struct m66592_ep *ep;
970 u16 pid;
971 u16 status = 0;
972 u16 w_index = le16_to_cpu(ctrl->wIndex);
973
974 switch (ctrl->bRequestType & USB_RECIP_MASK) {
975 case USB_RECIP_DEVICE:
976 status = 1 << USB_DEVICE_SELF_POWERED;
977 break;
978 case USB_RECIP_INTERFACE:
979 status = 0;
980 break;
981 case USB_RECIP_ENDPOINT:
982 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
983 pid = control_reg_get_pid(m66592, ep->pipenum);
984 if (pid == M66592_PID_STALL)
985 status = 1 << USB_ENDPOINT_HALT;
986 else
987 status = 0;
988 break;
989 default:
990 pipe_stall(m66592, 0);
991 return; /* exit */
992 }
993
994 m66592->ep0_data = cpu_to_le16(status);
995 m66592->ep0_req->buf = &m66592->ep0_data;
996 m66592->ep0_req->length = 2;
997 /* AV: what happens if we get called again before that gets through? */
998 spin_unlock(&m66592->lock);
999 m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
1000 spin_lock(&m66592->lock);
1001 }
1002
1003 static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1004 {
1005 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1006 case USB_RECIP_DEVICE:
1007 control_end(m66592, 1);
1008 break;
1009 case USB_RECIP_INTERFACE:
1010 control_end(m66592, 1);
1011 break;
1012 case USB_RECIP_ENDPOINT: {
1013 struct m66592_ep *ep;
1014 struct m66592_request *req;
1015 u16 w_index = le16_to_cpu(ctrl->wIndex);
1016
1017 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1018 pipe_stop(m66592, ep->pipenum);
1019 control_reg_sqclr(m66592, ep->pipenum);
1020
1021 control_end(m66592, 1);
1022
1023 req = list_entry(ep->queue.next,
1024 struct m66592_request, queue);
1025 if (ep->busy) {
1026 ep->busy = 0;
1027 if (list_empty(&ep->queue))
1028 break;
1029 start_packet(ep, req);
1030 } else if (!list_empty(&ep->queue))
1031 pipe_start(m66592, ep->pipenum);
1032 }
1033 break;
1034 default:
1035 pipe_stall(m66592, 0);
1036 break;
1037 }
1038 }
1039
1040 static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1041 {
1042 u16 tmp;
1043 int timeout = 3000;
1044
1045 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1046 case USB_RECIP_DEVICE:
1047 switch (le16_to_cpu(ctrl->wValue)) {
1048 case USB_DEVICE_TEST_MODE:
1049 control_end(m66592, 1);
1050 /* Wait for the completion of status stage */
1051 do {
1052 tmp = m66592_read(m66592, M66592_INTSTS0) &
1053 M66592_CTSQ;
1054 udelay(1);
1055 } while (tmp != M66592_CS_IDST && timeout-- > 0);
1056
1057 if (tmp == M66592_CS_IDST)
1058 m66592_bset(m66592,
1059 le16_to_cpu(ctrl->wIndex >> 8),
1060 M66592_TESTMODE);
1061 break;
1062 default:
1063 pipe_stall(m66592, 0);
1064 break;
1065 }
1066 break;
1067 case USB_RECIP_INTERFACE:
1068 control_end(m66592, 1);
1069 break;
1070 case USB_RECIP_ENDPOINT: {
1071 struct m66592_ep *ep;
1072 u16 w_index = le16_to_cpu(ctrl->wIndex);
1073
1074 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1075 pipe_stall(m66592, ep->pipenum);
1076
1077 control_end(m66592, 1);
1078 }
1079 break;
1080 default:
1081 pipe_stall(m66592, 0);
1082 break;
1083 }
1084 }
1085
1086 /* if return value is true, call class driver's setup() */
1087 static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1088 {
1089 u16 *p = (u16 *)ctrl;
1090 unsigned long offset = M66592_USBREQ;
1091 int i, ret = 0;
1092
1093 /* read fifo */
1094 m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);
1095
1096 for (i = 0; i < 4; i++)
1097 p[i] = m66592_read(m66592, offset + i*2);
1098
1099 /* check request */
1100 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1101 switch (ctrl->bRequest) {
1102 case USB_REQ_GET_STATUS:
1103 get_status(m66592, ctrl);
1104 break;
1105 case USB_REQ_CLEAR_FEATURE:
1106 clear_feature(m66592, ctrl);
1107 break;
1108 case USB_REQ_SET_FEATURE:
1109 set_feature(m66592, ctrl);
1110 break;
1111 default:
1112 ret = 1;
1113 break;
1114 }
1115 } else
1116 ret = 1;
1117 return ret;
1118 }
1119
1120 static void m66592_update_usb_speed(struct m66592 *m66592)
1121 {
1122 u16 speed = get_usb_speed(m66592);
1123
1124 switch (speed) {
1125 case M66592_HSMODE:
1126 m66592->gadget.speed = USB_SPEED_HIGH;
1127 break;
1128 case M66592_FSMODE:
1129 m66592->gadget.speed = USB_SPEED_FULL;
1130 break;
1131 default:
1132 m66592->gadget.speed = USB_SPEED_UNKNOWN;
1133 pr_err("USB speed unknown\n");
1134 }
1135 }
1136
1137 static void irq_device_state(struct m66592 *m66592)
1138 {
1139 u16 dvsq;
1140
1141 dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
1142 m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);
1143
1144 if (dvsq == M66592_DS_DFLT) { /* bus reset */
1145 usb_gadget_udc_reset(&m66592->gadget, m66592->driver);
1146 m66592_update_usb_speed(m66592);
1147 }
1148 if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
1149 m66592_update_usb_speed(m66592);
1150 if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
1151 && m66592->gadget.speed == USB_SPEED_UNKNOWN)
1152 m66592_update_usb_speed(m66592);
1153
1154 m66592->old_dvsq = dvsq;
1155 }
1156
1157 static void irq_control_stage(struct m66592 *m66592)
1158 __releases(m66592->lock)
1159 __acquires(m66592->lock)
1160 {
1161 struct usb_ctrlrequest ctrl;
1162 u16 ctsq;
1163
1164 ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
1165 m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);
1166
1167 switch (ctsq) {
1168 case M66592_CS_IDST: {
1169 struct m66592_ep *ep;
1170 struct m66592_request *req;
1171 ep = &m66592->ep[0];
1172 req = list_entry(ep->queue.next, struct m66592_request, queue);
1173 transfer_complete(ep, req, 0);
1174 }
1175 break;
1176
1177 case M66592_CS_RDDS:
1178 case M66592_CS_WRDS:
1179 case M66592_CS_WRND:
1180 if (setup_packet(m66592, &ctrl)) {
1181 spin_unlock(&m66592->lock);
1182 if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
1183 pipe_stall(m66592, 0);
1184 spin_lock(&m66592->lock);
1185 }
1186 break;
1187 case M66592_CS_RDSS:
1188 case M66592_CS_WRSS:
1189 control_end(m66592, 0);
1190 break;
1191 default:
1192 pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1193 break;
1194 }
1195 }
1196
1197 static irqreturn_t m66592_irq(int irq, void *_m66592)
1198 {
1199 struct m66592 *m66592 = _m66592;
1200 u16 intsts0;
1201 u16 intenb0;
1202 u16 savepipe;
1203 u16 mask0;
1204
1205 spin_lock(&m66592->lock);
1206
1207 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1208 intenb0 = m66592_read(m66592, M66592_INTENB0);
1209
1210 if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
1211 /*
1212 * When USB clock stops, it cannot read register. Even if a
1213 * clock stops, the interrupt occurs. So this driver turn on
1214 * a clock by this timing and do re-reading of register.
1215 */
1216 m66592_start_xclock(m66592);
1217 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1218 intenb0 = m66592_read(m66592, M66592_INTENB0);
1219 }
1220
1221 savepipe = m66592_read(m66592, M66592_CFIFOSEL);
1222
1223 mask0 = intsts0 & intenb0;
1224 if (mask0) {
1225 u16 brdysts = m66592_read(m66592, M66592_BRDYSTS);
1226 u16 bempsts = m66592_read(m66592, M66592_BEMPSTS);
1227 u16 brdyenb = m66592_read(m66592, M66592_BRDYENB);
1228 u16 bempenb = m66592_read(m66592, M66592_BEMPENB);
1229
1230 if (mask0 & M66592_VBINT) {
1231 m66592_write(m66592, 0xffff & ~M66592_VBINT,
1232 M66592_INTSTS0);
1233 m66592_start_xclock(m66592);
1234
1235 /* start vbus sampling */
1236 m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
1237 & M66592_VBSTS;
1238 m66592->scount = M66592_MAX_SAMPLING;
1239
1240 mod_timer(&m66592->timer,
1241 jiffies + msecs_to_jiffies(50));
1242 }
1243 if (intsts0 & M66592_DVSQ)
1244 irq_device_state(m66592);
1245
1246 if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
1247 && (brdysts & brdyenb)) {
1248 irq_pipe_ready(m66592, brdysts, brdyenb);
1249 }
1250 if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
1251 && (bempsts & bempenb)) {
1252 irq_pipe_empty(m66592, bempsts, bempenb);
1253 }
1254
1255 if (intsts0 & M66592_CTRT)
1256 irq_control_stage(m66592);
1257 }
1258
1259 m66592_write(m66592, savepipe, M66592_CFIFOSEL);
1260
1261 spin_unlock(&m66592->lock);
1262 return IRQ_HANDLED;
1263 }
1264
1265 static void m66592_timer(unsigned long _m66592)
1266 {
1267 struct m66592 *m66592 = (struct m66592 *)_m66592;
1268 unsigned long flags;
1269 u16 tmp;
1270
1271 spin_lock_irqsave(&m66592->lock, flags);
1272 tmp = m66592_read(m66592, M66592_SYSCFG);
1273 if (!(tmp & M66592_RCKE)) {
1274 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
1275 udelay(10);
1276 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
1277 }
1278 if (m66592->scount > 0) {
1279 tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
1280 if (tmp == m66592->old_vbus) {
1281 m66592->scount--;
1282 if (m66592->scount == 0) {
1283 if (tmp == M66592_VBSTS)
1284 m66592_usb_connect(m66592);
1285 else
1286 m66592_usb_disconnect(m66592);
1287 } else {
1288 mod_timer(&m66592->timer,
1289 jiffies + msecs_to_jiffies(50));
1290 }
1291 } else {
1292 m66592->scount = M66592_MAX_SAMPLING;
1293 m66592->old_vbus = tmp;
1294 mod_timer(&m66592->timer,
1295 jiffies + msecs_to_jiffies(50));
1296 }
1297 }
1298 spin_unlock_irqrestore(&m66592->lock, flags);
1299 }
1300
1301 /*-------------------------------------------------------------------------*/
1302 static int m66592_enable(struct usb_ep *_ep,
1303 const struct usb_endpoint_descriptor *desc)
1304 {
1305 struct m66592_ep *ep;
1306
1307 ep = container_of(_ep, struct m66592_ep, ep);
1308 return alloc_pipe_config(ep, desc);
1309 }
1310
1311 static int m66592_disable(struct usb_ep *_ep)
1312 {
1313 struct m66592_ep *ep;
1314 struct m66592_request *req;
1315 unsigned long flags;
1316
1317 ep = container_of(_ep, struct m66592_ep, ep);
1318 BUG_ON(!ep);
1319
1320 while (!list_empty(&ep->queue)) {
1321 req = list_entry(ep->queue.next, struct m66592_request, queue);
1322 spin_lock_irqsave(&ep->m66592->lock, flags);
1323 transfer_complete(ep, req, -ECONNRESET);
1324 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1325 }
1326
1327 pipe_irq_disable(ep->m66592, ep->pipenum);
1328 return free_pipe_config(ep);
1329 }
1330
1331 static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
1332 gfp_t gfp_flags)
1333 {
1334 struct m66592_request *req;
1335
1336 req = kzalloc(sizeof(struct m66592_request), gfp_flags);
1337 if (!req)
1338 return NULL;
1339
1340 INIT_LIST_HEAD(&req->queue);
1341
1342 return &req->req;
1343 }
1344
1345 static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
1346 {
1347 struct m66592_request *req;
1348
1349 req = container_of(_req, struct m66592_request, req);
1350 kfree(req);
1351 }
1352
1353 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
1354 gfp_t gfp_flags)
1355 {
1356 struct m66592_ep *ep;
1357 struct m66592_request *req;
1358 unsigned long flags;
1359 int request = 0;
1360
1361 ep = container_of(_ep, struct m66592_ep, ep);
1362 req = container_of(_req, struct m66592_request, req);
1363
1364 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
1365 return -ESHUTDOWN;
1366
1367 spin_lock_irqsave(&ep->m66592->lock, flags);
1368
1369 if (list_empty(&ep->queue))
1370 request = 1;
1371
1372 list_add_tail(&req->queue, &ep->queue);
1373 req->req.actual = 0;
1374 req->req.status = -EINPROGRESS;
1375
1376 if (ep->ep.desc == NULL) /* control */
1377 start_ep0(ep, req);
1378 else {
1379 if (request && !ep->busy)
1380 start_packet(ep, req);
1381 }
1382
1383 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1384
1385 return 0;
1386 }
1387
1388 static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1389 {
1390 struct m66592_ep *ep;
1391 struct m66592_request *req;
1392 unsigned long flags;
1393
1394 ep = container_of(_ep, struct m66592_ep, ep);
1395 req = container_of(_req, struct m66592_request, req);
1396
1397 spin_lock_irqsave(&ep->m66592->lock, flags);
1398 if (!list_empty(&ep->queue))
1399 transfer_complete(ep, req, -ECONNRESET);
1400 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1401
1402 return 0;
1403 }
1404
1405 static int m66592_set_halt(struct usb_ep *_ep, int value)
1406 {
1407 struct m66592_ep *ep = container_of(_ep, struct m66592_ep, ep);
1408 unsigned long flags;
1409 int ret = 0;
1410
1411 spin_lock_irqsave(&ep->m66592->lock, flags);
1412 if (!list_empty(&ep->queue)) {
1413 ret = -EAGAIN;
1414 } else if (value) {
1415 ep->busy = 1;
1416 pipe_stall(ep->m66592, ep->pipenum);
1417 } else {
1418 ep->busy = 0;
1419 pipe_stop(ep->m66592, ep->pipenum);
1420 }
1421 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1422 return ret;
1423 }
1424
1425 static void m66592_fifo_flush(struct usb_ep *_ep)
1426 {
1427 struct m66592_ep *ep;
1428 unsigned long flags;
1429
1430 ep = container_of(_ep, struct m66592_ep, ep);
1431 spin_lock_irqsave(&ep->m66592->lock, flags);
1432 if (list_empty(&ep->queue) && !ep->busy) {
1433 pipe_stop(ep->m66592, ep->pipenum);
1434 m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
1435 }
1436 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1437 }
1438
1439 static const struct usb_ep_ops m66592_ep_ops = {
1440 .enable = m66592_enable,
1441 .disable = m66592_disable,
1442
1443 .alloc_request = m66592_alloc_request,
1444 .free_request = m66592_free_request,
1445
1446 .queue = m66592_queue,
1447 .dequeue = m66592_dequeue,
1448
1449 .set_halt = m66592_set_halt,
1450 .fifo_flush = m66592_fifo_flush,
1451 };
1452
1453 /*-------------------------------------------------------------------------*/
1454 static int m66592_udc_start(struct usb_gadget *g,
1455 struct usb_gadget_driver *driver)
1456 {
1457 struct m66592 *m66592 = to_m66592(g);
1458
1459 /* hook up the driver */
1460 driver->driver.bus = NULL;
1461 m66592->driver = driver;
1462
1463 m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1464 if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
1465 m66592_start_xclock(m66592);
1466 /* start vbus sampling */
1467 m66592->old_vbus = m66592_read(m66592,
1468 M66592_INTSTS0) & M66592_VBSTS;
1469 m66592->scount = M66592_MAX_SAMPLING;
1470 mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
1471 }
1472
1473 return 0;
1474 }
1475
1476 static int m66592_udc_stop(struct usb_gadget *g)
1477 {
1478 struct m66592 *m66592 = to_m66592(g);
1479
1480 m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1481
1482 init_controller(m66592);
1483 disable_controller(m66592);
1484
1485 m66592->driver = NULL;
1486
1487 return 0;
1488 }
1489
1490 /*-------------------------------------------------------------------------*/
1491 static int m66592_get_frame(struct usb_gadget *_gadget)
1492 {
1493 struct m66592 *m66592 = gadget_to_m66592(_gadget);
1494 return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
1495 }
1496
1497 static int m66592_pullup(struct usb_gadget *gadget, int is_on)
1498 {
1499 struct m66592 *m66592 = gadget_to_m66592(gadget);
1500 unsigned long flags;
1501
1502 spin_lock_irqsave(&m66592->lock, flags);
1503 if (is_on)
1504 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
1505 else
1506 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
1507 spin_unlock_irqrestore(&m66592->lock, flags);
1508
1509 return 0;
1510 }
1511
1512 static const struct usb_gadget_ops m66592_gadget_ops = {
1513 .get_frame = m66592_get_frame,
1514 .udc_start = m66592_udc_start,
1515 .udc_stop = m66592_udc_stop,
1516 .pullup = m66592_pullup,
1517 };
1518
1519 static int m66592_remove(struct platform_device *pdev)
1520 {
1521 struct m66592 *m66592 = platform_get_drvdata(pdev);
1522
1523 usb_del_gadget_udc(&m66592->gadget);
1524
1525 del_timer_sync(&m66592->timer);
1526 iounmap(m66592->reg);
1527 free_irq(platform_get_irq(pdev, 0), m66592);
1528 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1529 if (m66592->pdata->on_chip) {
1530 clk_disable(m66592->clk);
1531 clk_put(m66592->clk);
1532 }
1533 kfree(m66592);
1534 return 0;
1535 }
1536
1537 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1538 {
1539 }
1540
1541 static int m66592_probe(struct platform_device *pdev)
1542 {
1543 struct resource *res, *ires;
1544 void __iomem *reg = NULL;
1545 struct m66592 *m66592 = NULL;
1546 char clk_name[8];
1547 int ret = 0;
1548 int i;
1549
1550 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1551 if (!res) {
1552 ret = -ENODEV;
1553 pr_err("platform_get_resource error.\n");
1554 goto clean_up;
1555 }
1556
1557 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1558 if (!ires) {
1559 ret = -ENODEV;
1560 dev_err(&pdev->dev,
1561 "platform_get_resource IORESOURCE_IRQ error.\n");
1562 goto clean_up;
1563 }
1564
1565 reg = ioremap(res->start, resource_size(res));
1566 if (reg == NULL) {
1567 ret = -ENOMEM;
1568 pr_err("ioremap error.\n");
1569 goto clean_up;
1570 }
1571
1572 if (dev_get_platdata(&pdev->dev) == NULL) {
1573 dev_err(&pdev->dev, "no platform data\n");
1574 ret = -ENODEV;
1575 goto clean_up;
1576 }
1577
1578 /* initialize ucd */
1579 m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
1580 if (m66592 == NULL) {
1581 ret = -ENOMEM;
1582 goto clean_up;
1583 }
1584
1585 m66592->pdata = dev_get_platdata(&pdev->dev);
1586 m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1587
1588 spin_lock_init(&m66592->lock);
1589 platform_set_drvdata(pdev, m66592);
1590
1591 m66592->gadget.ops = &m66592_gadget_ops;
1592 m66592->gadget.max_speed = USB_SPEED_HIGH;
1593 m66592->gadget.name = udc_name;
1594
1595 init_timer(&m66592->timer);
1596 m66592->timer.function = m66592_timer;
1597 m66592->timer.data = (unsigned long)m66592;
1598 m66592->reg = reg;
1599
1600 ret = request_irq(ires->start, m66592_irq, IRQF_SHARED,
1601 udc_name, m66592);
1602 if (ret < 0) {
1603 pr_err("request_irq error (%d)\n", ret);
1604 goto clean_up;
1605 }
1606
1607 if (m66592->pdata->on_chip) {
1608 snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
1609 m66592->clk = clk_get(&pdev->dev, clk_name);
1610 if (IS_ERR(m66592->clk)) {
1611 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1612 clk_name);
1613 ret = PTR_ERR(m66592->clk);
1614 goto clean_up2;
1615 }
1616 clk_enable(m66592->clk);
1617 }
1618
1619 INIT_LIST_HEAD(&m66592->gadget.ep_list);
1620 m66592->gadget.ep0 = &m66592->ep[0].ep;
1621 INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
1622 for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
1623 struct m66592_ep *ep = &m66592->ep[i];
1624
1625 if (i != 0) {
1626 INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
1627 list_add_tail(&m66592->ep[i].ep.ep_list,
1628 &m66592->gadget.ep_list);
1629 }
1630 ep->m66592 = m66592;
1631 INIT_LIST_HEAD(&ep->queue);
1632 ep->ep.name = m66592_ep_name[i];
1633 ep->ep.ops = &m66592_ep_ops;
1634 usb_ep_set_maxpacket_limit(&ep->ep, 512);
1635
1636 if (i == 0) {
1637 ep->ep.caps.type_control = true;
1638 } else {
1639 ep->ep.caps.type_iso = true;
1640 ep->ep.caps.type_bulk = true;
1641 ep->ep.caps.type_int = true;
1642 }
1643
1644 ep->ep.caps.dir_in = true;
1645 ep->ep.caps.dir_out = true;
1646 }
1647 usb_ep_set_maxpacket_limit(&m66592->ep[0].ep, 64);
1648 m66592->ep[0].pipenum = 0;
1649 m66592->ep[0].fifoaddr = M66592_CFIFO;
1650 m66592->ep[0].fifosel = M66592_CFIFOSEL;
1651 m66592->ep[0].fifoctr = M66592_CFIFOCTR;
1652 m66592->ep[0].fifotrn = 0;
1653 m66592->ep[0].pipectr = get_pipectr_addr(0);
1654 m66592->pipenum2ep[0] = &m66592->ep[0];
1655 m66592->epaddr2ep[0] = &m66592->ep[0];
1656
1657 m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
1658 if (m66592->ep0_req == NULL) {
1659 ret = -ENOMEM;
1660 goto clean_up3;
1661 }
1662 m66592->ep0_req->complete = nop_completion;
1663
1664 init_controller(m66592);
1665
1666 ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
1667 if (ret)
1668 goto err_add_udc;
1669
1670 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1671 return 0;
1672
1673 err_add_udc:
1674 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1675
1676 clean_up3:
1677 if (m66592->pdata->on_chip) {
1678 clk_disable(m66592->clk);
1679 clk_put(m66592->clk);
1680 }
1681 clean_up2:
1682 free_irq(ires->start, m66592);
1683 clean_up:
1684 if (m66592) {
1685 if (m66592->ep0_req)
1686 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1687 kfree(m66592);
1688 }
1689 if (reg)
1690 iounmap(reg);
1691
1692 return ret;
1693 }
1694
1695 /*-------------------------------------------------------------------------*/
1696 static struct platform_driver m66592_driver = {
1697 .remove = m66592_remove,
1698 .driver = {
1699 .name = (char *) udc_name,
1700 },
1701 };
1702
1703 module_platform_driver_probe(m66592_driver, m66592_probe);
Linux with added FPC-III support