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Merge remote-tracking branch 'driver-core/driver-core-next'
[linux-2.6/next.git] / drivers / usb / gadget / m66592-udc.c
blob491f825ed5c93b1e1e525c2f5ae8ffefdf88c23a
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 * 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 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 */
22
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/delay.h>
26 #include <linux/io.h>
27 #include <linux/platform_device.h>
28 #include <linux/slab.h>
29 #include <linux/err.h>
30 #include <linux/usb/ch9.h>
31 #include <linux/usb/gadget.h>
32
33 #include "m66592-udc.h"
34
35 MODULE_DESCRIPTION("M66592 USB gadget driver");
36 MODULE_LICENSE("GPL");
37 MODULE_AUTHOR("Yoshihiro Shimoda");
38 MODULE_ALIAS("platform:m66592_udc");
39
40 #define DRIVER_VERSION "21 July 2009"
41
42 static const char udc_name[] = "m66592_udc";
43 static const char *m66592_ep_name[] = {
44 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
45 };
46
47 static void disable_controller(struct m66592 *m66592);
48 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
49 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
50 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
51 gfp_t gfp_flags);
52
53 static void transfer_complete(struct m66592_ep *ep,
54 struct m66592_request *req, int status);
55
56 /*-------------------------------------------------------------------------*/
57 static inline u16 get_usb_speed(struct m66592 *m66592)
58 {
59 return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
60 }
61
62 static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
63 unsigned long reg)
64 {
65 u16 tmp;
66
67 tmp = m66592_read(m66592, M66592_INTENB0);
68 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
69 M66592_INTENB0);
70 m66592_bset(m66592, (1 << pipenum), reg);
71 m66592_write(m66592, tmp, M66592_INTENB0);
72 }
73
74 static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
75 unsigned long reg)
76 {
77 u16 tmp;
78
79 tmp = m66592_read(m66592, M66592_INTENB0);
80 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
81 M66592_INTENB0);
82 m66592_bclr(m66592, (1 << pipenum), reg);
83 m66592_write(m66592, tmp, M66592_INTENB0);
84 }
85
86 static void m66592_usb_connect(struct m66592 *m66592)
87 {
88 m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
89 m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
90 M66592_INTENB0);
91 m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
92
93 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
94 }
95
96 static void m66592_usb_disconnect(struct m66592 *m66592)
97 __releases(m66592->lock)
98 __acquires(m66592->lock)
99 {
100 m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
101 m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
102 M66592_INTENB0);
103 m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
104 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
105
106 m66592->gadget.speed = USB_SPEED_UNKNOWN;
107 spin_unlock(&m66592->lock);
108 m66592->driver->disconnect(&m66592->gadget);
109 spin_lock(&m66592->lock);
110
111 disable_controller(m66592);
112 INIT_LIST_HEAD(&m66592->ep[0].queue);
113 }
114
115 static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
116 {
117 u16 pid = 0;
118 unsigned long offset;
119
120 if (pipenum == 0)
121 pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
122 else if (pipenum < M66592_MAX_NUM_PIPE) {
123 offset = get_pipectr_addr(pipenum);
124 pid = m66592_read(m66592, offset) & M66592_PID;
125 } else
126 pr_err("unexpect pipe num (%d)\n", pipenum);
127
128 return pid;
129 }
130
131 static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
132 u16 pid)
133 {
134 unsigned long offset;
135
136 if (pipenum == 0)
137 m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
138 else if (pipenum < M66592_MAX_NUM_PIPE) {
139 offset = get_pipectr_addr(pipenum);
140 m66592_mdfy(m66592, pid, M66592_PID, offset);
141 } else
142 pr_err("unexpect pipe num (%d)\n", pipenum);
143 }
144
145 static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
146 {
147 control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
148 }
149
150 static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
151 {
152 control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
153 }
154
155 static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
156 {
157 control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
158 }
159
160 static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
161 {
162 u16 ret = 0;
163 unsigned long offset;
164
165 if (pipenum == 0)
166 ret = m66592_read(m66592, M66592_DCPCTR);
167 else if (pipenum < M66592_MAX_NUM_PIPE) {
168 offset = get_pipectr_addr(pipenum);
169 ret = m66592_read(m66592, offset);
170 } else
171 pr_err("unexpect pipe num (%d)\n", pipenum);
172
173 return ret;
174 }
175
176 static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
177 {
178 unsigned long offset;
179
180 pipe_stop(m66592, pipenum);
181
182 if (pipenum == 0)
183 m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
184 else if (pipenum < M66592_MAX_NUM_PIPE) {
185 offset = get_pipectr_addr(pipenum);
186 m66592_bset(m66592, M66592_SQCLR, offset);
187 } else
188 pr_err("unexpect pipe num(%d)\n", pipenum);
189 }
190
191 static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
192 {
193 u16 tmp;
194 int size;
195
196 if (pipenum == 0) {
197 tmp = m66592_read(m66592, M66592_DCPCFG);
198 if ((tmp & M66592_CNTMD) != 0)
199 size = 256;
200 else {
201 tmp = m66592_read(m66592, M66592_DCPMAXP);
202 size = tmp & M66592_MAXP;
203 }
204 } else {
205 m66592_write(m66592, pipenum, M66592_PIPESEL);
206 tmp = m66592_read(m66592, M66592_PIPECFG);
207 if ((tmp & M66592_CNTMD) != 0) {
208 tmp = m66592_read(m66592, M66592_PIPEBUF);
209 size = ((tmp >> 10) + 1) * 64;
210 } else {
211 tmp = m66592_read(m66592, M66592_PIPEMAXP);
212 size = tmp & M66592_MXPS;
213 }
214 }
215
216 return size;
217 }
218
219 static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
220 {
221 struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
222 unsigned short mbw;
223
224 if (ep->use_dma)
225 return;
226
227 m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);
228
229 ndelay(450);
230
231 if (m66592->pdata->on_chip)
232 mbw = M66592_MBW_32;
233 else
234 mbw = M66592_MBW_16;
235
236 m66592_bset(m66592, mbw, ep->fifosel);
237 }
238
239 static int pipe_buffer_setting(struct m66592 *m66592,
240 struct m66592_pipe_info *info)
241 {
242 u16 bufnum = 0, buf_bsize = 0;
243 u16 pipecfg = 0;
244
245 if (info->pipe == 0)
246 return -EINVAL;
247
248 m66592_write(m66592, info->pipe, M66592_PIPESEL);
249
250 if (info->dir_in)
251 pipecfg |= M66592_DIR;
252 pipecfg |= info->type;
253 pipecfg |= info->epnum;
254 switch (info->type) {
255 case M66592_INT:
256 bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
257 buf_bsize = 0;
258 break;
259 case M66592_BULK:
260 /* isochronous pipes may be used as bulk pipes */
261 if (info->pipe >= M66592_BASE_PIPENUM_BULK)
262 bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
263 else
264 bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;
265
266 bufnum = M66592_BASE_BUFNUM + (bufnum * 16);
267 buf_bsize = 7;
268 pipecfg |= M66592_DBLB;
269 if (!info->dir_in)
270 pipecfg |= M66592_SHTNAK;
271 break;
272 case M66592_ISO:
273 bufnum = M66592_BASE_BUFNUM +
274 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
275 buf_bsize = 7;
276 break;
277 }
278
279 if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) {
280 pr_err("m66592 pipe memory is insufficient\n");
281 return -ENOMEM;
282 }
283
284 m66592_write(m66592, pipecfg, M66592_PIPECFG);
285 m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
286 m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
287 if (info->interval)
288 info->interval--;
289 m66592_write(m66592, info->interval, M66592_PIPEPERI);
290
291 return 0;
292 }
293
294 static void pipe_buffer_release(struct m66592 *m66592,
295 struct m66592_pipe_info *info)
296 {
297 if (info->pipe == 0)
298 return;
299
300 if (is_bulk_pipe(info->pipe)) {
301 m66592->bulk--;
302 } else if (is_interrupt_pipe(info->pipe))
303 m66592->interrupt--;
304 else if (is_isoc_pipe(info->pipe)) {
305 m66592->isochronous--;
306 if (info->type == M66592_BULK)
307 m66592->bulk--;
308 } else
309 pr_err("ep_release: unexpect pipenum (%d)\n",
310 info->pipe);
311 }
312
313 static void pipe_initialize(struct m66592_ep *ep)
314 {
315 struct m66592 *m66592 = ep->m66592;
316 unsigned short mbw;
317
318 m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
319
320 m66592_write(m66592, M66592_ACLRM, ep->pipectr);
321 m66592_write(m66592, 0, ep->pipectr);
322 m66592_write(m66592, M66592_SQCLR, ep->pipectr);
323 if (ep->use_dma) {
324 m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);
325
326 ndelay(450);
327
328 if (m66592->pdata->on_chip)
329 mbw = M66592_MBW_32;
330 else
331 mbw = M66592_MBW_16;
332
333 m66592_bset(m66592, mbw, ep->fifosel);
334 }
335 }
336
337 static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
338 const struct usb_endpoint_descriptor *desc,
339 u16 pipenum, int dma)
340 {
341 if ((pipenum != 0) && dma) {
342 if (m66592->num_dma == 0) {
343 m66592->num_dma++;
344 ep->use_dma = 1;
345 ep->fifoaddr = M66592_D0FIFO;
346 ep->fifosel = M66592_D0FIFOSEL;
347 ep->fifoctr = M66592_D0FIFOCTR;
348 ep->fifotrn = M66592_D0FIFOTRN;
349 } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
350 m66592->num_dma++;
351 ep->use_dma = 1;
352 ep->fifoaddr = M66592_D1FIFO;
353 ep->fifosel = M66592_D1FIFOSEL;
354 ep->fifoctr = M66592_D1FIFOCTR;
355 ep->fifotrn = M66592_D1FIFOTRN;
356 } else {
357 ep->use_dma = 0;
358 ep->fifoaddr = M66592_CFIFO;
359 ep->fifosel = M66592_CFIFOSEL;
360 ep->fifoctr = M66592_CFIFOCTR;
361 ep->fifotrn = 0;
362 }
363 } else {
364 ep->use_dma = 0;
365 ep->fifoaddr = M66592_CFIFO;
366 ep->fifosel = M66592_CFIFOSEL;
367 ep->fifoctr = M66592_CFIFOCTR;
368 ep->fifotrn = 0;
369 }
370
371 ep->pipectr = get_pipectr_addr(pipenum);
372 ep->pipenum = pipenum;
373 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
374 m66592->pipenum2ep[pipenum] = ep;
375 m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
376 INIT_LIST_HEAD(&ep->queue);
377 }
378
379 static void m66592_ep_release(struct m66592_ep *ep)
380 {
381 struct m66592 *m66592 = ep->m66592;
382 u16 pipenum = ep->pipenum;
383
384 if (pipenum == 0)
385 return;
386
387 if (ep->use_dma)
388 m66592->num_dma--;
389 ep->pipenum = 0;
390 ep->busy = 0;
391 ep->use_dma = 0;
392 }
393
394 static int alloc_pipe_config(struct m66592_ep *ep,
395 const struct usb_endpoint_descriptor *desc)
396 {
397 struct m66592 *m66592 = ep->m66592;
398 struct m66592_pipe_info info;
399 int dma = 0;
400 int *counter;
401 int ret;
402
403 ep->desc = desc;
404
405 BUG_ON(ep->pipenum);
406
407 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
408 case USB_ENDPOINT_XFER_BULK:
409 if (m66592->bulk >= M66592_MAX_NUM_BULK) {
410 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
411 pr_err("bulk pipe is insufficient\n");
412 return -ENODEV;
413 } else {
414 info.pipe = M66592_BASE_PIPENUM_ISOC
415 + m66592->isochronous;
416 counter = &m66592->isochronous;
417 }
418 } else {
419 info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
420 counter = &m66592->bulk;
421 }
422 info.type = M66592_BULK;
423 dma = 1;
424 break;
425 case USB_ENDPOINT_XFER_INT:
426 if (m66592->interrupt >= M66592_MAX_NUM_INT) {
427 pr_err("interrupt pipe is insufficient\n");
428 return -ENODEV;
429 }
430 info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
431 info.type = M66592_INT;
432 counter = &m66592->interrupt;
433 break;
434 case USB_ENDPOINT_XFER_ISOC:
435 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
436 pr_err("isochronous pipe is insufficient\n");
437 return -ENODEV;
438 }
439 info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
440 info.type = M66592_ISO;
441 counter = &m66592->isochronous;
442 break;
443 default:
444 pr_err("unexpect xfer type\n");
445 return -EINVAL;
446 }
447 ep->type = info.type;
448
449 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
450 info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
451 info.interval = desc->bInterval;
452 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
453 info.dir_in = 1;
454 else
455 info.dir_in = 0;
456
457 ret = pipe_buffer_setting(m66592, &info);
458 if (ret < 0) {
459 pr_err("pipe_buffer_setting fail\n");
460 return ret;
461 }
462
463 (*counter)++;
464 if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
465 m66592->bulk++;
466
467 m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
468 pipe_initialize(ep);
469
470 return 0;
471 }
472
473 static int free_pipe_config(struct m66592_ep *ep)
474 {
475 struct m66592 *m66592 = ep->m66592;
476 struct m66592_pipe_info info;
477
478 info.pipe = ep->pipenum;
479 info.type = ep->type;
480 pipe_buffer_release(m66592, &info);
481 m66592_ep_release(ep);
482
483 return 0;
484 }
485
486 /*-------------------------------------------------------------------------*/
487 static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
488 {
489 enable_irq_ready(m66592, pipenum);
490 enable_irq_nrdy(m66592, pipenum);
491 }
492
493 static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
494 {
495 disable_irq_ready(m66592, pipenum);
496 disable_irq_nrdy(m66592, pipenum);
497 }
498
499 /* if complete is true, gadget driver complete function is not call */
500 static void control_end(struct m66592 *m66592, unsigned ccpl)
501 {
502 m66592->ep[0].internal_ccpl = ccpl;
503 pipe_start(m66592, 0);
504 m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
505 }
506
507 static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
508 {
509 struct m66592 *m66592 = ep->m66592;
510
511 pipe_change(m66592, ep->pipenum);
512 m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
513 (M66592_ISEL | M66592_CURPIPE),
514 M66592_CFIFOSEL);
515 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
516 if (req->req.length == 0) {
517 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
518 pipe_start(m66592, 0);
519 transfer_complete(ep, req, 0);
520 } else {
521 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
522 irq_ep0_write(ep, req);
523 }
524 }
525
526 static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
527 {
528 struct m66592 *m66592 = ep->m66592;
529 u16 tmp;
530
531 pipe_change(m66592, ep->pipenum);
532 disable_irq_empty(m66592, ep->pipenum);
533 pipe_start(m66592, ep->pipenum);
534
535 tmp = m66592_read(m66592, ep->fifoctr);
536 if (unlikely((tmp & M66592_FRDY) == 0))
537 pipe_irq_enable(m66592, ep->pipenum);
538 else
539 irq_packet_write(ep, req);
540 }
541
542 static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
543 {
544 struct m66592 *m66592 = ep->m66592;
545 u16 pipenum = ep->pipenum;
546
547 if (ep->pipenum == 0) {
548 m66592_mdfy(m66592, M66592_PIPE0,
549 (M66592_ISEL | M66592_CURPIPE),
550 M66592_CFIFOSEL);
551 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
552 pipe_start(m66592, pipenum);
553 pipe_irq_enable(m66592, pipenum);
554 } else {
555 if (ep->use_dma) {
556 m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
557 pipe_change(m66592, pipenum);
558 m66592_bset(m66592, M66592_TRENB, ep->fifosel);
559 m66592_write(m66592,
560 (req->req.length + ep->ep.maxpacket - 1)
561 / ep->ep.maxpacket,
562 ep->fifotrn);
563 }
564 pipe_start(m66592, pipenum); /* trigger once */
565 pipe_irq_enable(m66592, pipenum);
566 }
567 }
568
569 static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
570 {
571 if (ep->desc->bEndpointAddress & USB_DIR_IN)
572 start_packet_write(ep, req);
573 else
574 start_packet_read(ep, req);
575 }
576
577 static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
578 {
579 u16 ctsq;
580
581 ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;
582
583 switch (ctsq) {
584 case M66592_CS_RDDS:
585 start_ep0_write(ep, req);
586 break;
587 case M66592_CS_WRDS:
588 start_packet_read(ep, req);
589 break;
590
591 case M66592_CS_WRND:
592 control_end(ep->m66592, 0);
593 break;
594 default:
595 pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
596 break;
597 }
598 }
599
600 static void init_controller(struct m66592 *m66592)
601 {
602 unsigned int endian;
603
604 if (m66592->pdata->on_chip) {
605 if (m66592->pdata->endian)
606 endian = 0; /* big endian */
607 else
608 endian = M66592_LITTLE; /* little endian */
609
610 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
611 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
612 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
613 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
614
615 /* This is a workaound for SH7722 2nd cut */
616 m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
617 m66592_bset(m66592, 0x1000, M66592_TESTMODE);
618 m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
619
620 m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
621
622 m66592_write(m66592, 0, M66592_CFBCFG);
623 m66592_write(m66592, 0, M66592_D0FBCFG);
624 m66592_bset(m66592, endian, M66592_CFBCFG);
625 m66592_bset(m66592, endian, M66592_D0FBCFG);
626 } else {
627 unsigned int clock, vif, irq_sense;
628
629 if (m66592->pdata->endian)
630 endian = M66592_BIGEND; /* big endian */
631 else
632 endian = 0; /* little endian */
633
634 if (m66592->pdata->vif)
635 vif = M66592_LDRV; /* 3.3v */
636 else
637 vif = 0; /* 1.5v */
638
639 switch (m66592->pdata->xtal) {
640 case M66592_PLATDATA_XTAL_12MHZ:
641 clock = M66592_XTAL12;
642 break;
643 case M66592_PLATDATA_XTAL_24MHZ:
644 clock = M66592_XTAL24;
645 break;
646 case M66592_PLATDATA_XTAL_48MHZ:
647 clock = M66592_XTAL48;
648 break;
649 default:
650 pr_warning("m66592-udc: xtal configuration error\n");
651 clock = 0;
652 }
653
654 switch (m66592->irq_trigger) {
655 case IRQF_TRIGGER_LOW:
656 irq_sense = M66592_INTL;
657 break;
658 case IRQF_TRIGGER_FALLING:
659 irq_sense = 0;
660 break;
661 default:
662 pr_warning("m66592-udc: irq trigger config error\n");
663 irq_sense = 0;
664 }
665
666 m66592_bset(m66592,
667 (vif & M66592_LDRV) | (endian & M66592_BIGEND),
668 M66592_PINCFG);
669 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
670 m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
671 M66592_SYSCFG);
672 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
673 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
674 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
675
676 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
677
678 msleep(3);
679
680 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
681
682 msleep(1);
683
684 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
685
686 m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
687 m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
688 M66592_DMA0CFG);
689 }
690 }
691
692 static void disable_controller(struct m66592 *m66592)
693 {
694 m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE);
695 if (!m66592->pdata->on_chip) {
696 m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
697 udelay(1);
698 m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
699 udelay(1);
700 m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
701 udelay(1);
702 m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
703 }
704 }
705
706 static void m66592_start_xclock(struct m66592 *m66592)
707 {
708 u16 tmp;
709
710 if (!m66592->pdata->on_chip) {
711 tmp = m66592_read(m66592, M66592_SYSCFG);
712 if (!(tmp & M66592_XCKE))
713 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
714 }
715 }
716
717 /*-------------------------------------------------------------------------*/
718 static void transfer_complete(struct m66592_ep *ep,
719 struct m66592_request *req, int status)
720 __releases(m66592->lock)
721 __acquires(m66592->lock)
722 {
723 int restart = 0;
724
725 if (unlikely(ep->pipenum == 0)) {
726 if (ep->internal_ccpl) {
727 ep->internal_ccpl = 0;
728 return;
729 }
730 }
731
732 list_del_init(&req->queue);
733 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
734 req->req.status = -ESHUTDOWN;
735 else
736 req->req.status = status;
737
738 if (!list_empty(&ep->queue))
739 restart = 1;
740
741 spin_unlock(&ep->m66592->lock);
742 req->req.complete(&ep->ep, &req->req);
743 spin_lock(&ep->m66592->lock);
744
745 if (restart) {
746 req = list_entry(ep->queue.next, struct m66592_request, queue);
747 if (ep->desc)
748 start_packet(ep, req);
749 }
750 }
751
752 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
753 {
754 int i;
755 u16 tmp;
756 unsigned bufsize;
757 size_t size;
758 void *buf;
759 u16 pipenum = ep->pipenum;
760 struct m66592 *m66592 = ep->m66592;
761
762 pipe_change(m66592, pipenum);
763 m66592_bset(m66592, M66592_ISEL, ep->fifosel);
764
765 i = 0;
766 do {
767 tmp = m66592_read(m66592, ep->fifoctr);
768 if (i++ > 100000) {
769 pr_err("pipe0 is busy. maybe cpu i/o bus "
770 "conflict. please power off this controller.");
771 return;
772 }
773 ndelay(1);
774 } while ((tmp & M66592_FRDY) == 0);
775
776 /* prepare parameters */
777 bufsize = get_buffer_size(m66592, pipenum);
778 buf = req->req.buf + req->req.actual;
779 size = min(bufsize, req->req.length - req->req.actual);
780
781 /* write fifo */
782 if (req->req.buf) {
783 if (size > 0)
784 m66592_write_fifo(m66592, ep, buf, size);
785 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
786 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
787 }
788
789 /* update parameters */
790 req->req.actual += size;
791
792 /* check transfer finish */
793 if ((!req->req.zero && (req->req.actual == req->req.length))
794 || (size % ep->ep.maxpacket)
795 || (size == 0)) {
796 disable_irq_ready(m66592, pipenum);
797 disable_irq_empty(m66592, pipenum);
798 } else {
799 disable_irq_ready(m66592, pipenum);
800 enable_irq_empty(m66592, pipenum);
801 }
802 pipe_start(m66592, pipenum);
803 }
804
805 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
806 {
807 u16 tmp;
808 unsigned bufsize;
809 size_t size;
810 void *buf;
811 u16 pipenum = ep->pipenum;
812 struct m66592 *m66592 = ep->m66592;
813
814 pipe_change(m66592, pipenum);
815 tmp = m66592_read(m66592, ep->fifoctr);
816 if (unlikely((tmp & M66592_FRDY) == 0)) {
817 pipe_stop(m66592, pipenum);
818 pipe_irq_disable(m66592, pipenum);
819 pr_err("write fifo not ready. pipnum=%d\n", pipenum);
820 return;
821 }
822
823 /* prepare parameters */
824 bufsize = get_buffer_size(m66592, pipenum);
825 buf = req->req.buf + req->req.actual;
826 size = min(bufsize, req->req.length - req->req.actual);
827
828 /* write fifo */
829 if (req->req.buf) {
830 m66592_write_fifo(m66592, ep, buf, size);
831 if ((size == 0)
832 || ((size % ep->ep.maxpacket) != 0)
833 || ((bufsize != ep->ep.maxpacket)
834 && (bufsize > size)))
835 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
836 }
837
838 /* update parameters */
839 req->req.actual += size;
840 /* check transfer finish */
841 if ((!req->req.zero && (req->req.actual == req->req.length))
842 || (size % ep->ep.maxpacket)
843 || (size == 0)) {
844 disable_irq_ready(m66592, pipenum);
845 enable_irq_empty(m66592, pipenum);
846 } else {
847 disable_irq_empty(m66592, pipenum);
848 pipe_irq_enable(m66592, pipenum);
849 }
850 }
851
852 static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
853 {
854 u16 tmp;
855 int rcv_len, bufsize, req_len;
856 int size;
857 void *buf;
858 u16 pipenum = ep->pipenum;
859 struct m66592 *m66592 = ep->m66592;
860 int finish = 0;
861
862 pipe_change(m66592, pipenum);
863 tmp = m66592_read(m66592, ep->fifoctr);
864 if (unlikely((tmp & M66592_FRDY) == 0)) {
865 req->req.status = -EPIPE;
866 pipe_stop(m66592, pipenum);
867 pipe_irq_disable(m66592, pipenum);
868 pr_err("read fifo not ready");
869 return;
870 }
871
872 /* prepare parameters */
873 rcv_len = tmp & M66592_DTLN;
874 bufsize = get_buffer_size(m66592, pipenum);
875
876 buf = req->req.buf + req->req.actual;
877 req_len = req->req.length - req->req.actual;
878 if (rcv_len < bufsize)
879 size = min(rcv_len, req_len);
880 else
881 size = min(bufsize, req_len);
882
883 /* update parameters */
884 req->req.actual += size;
885
886 /* check transfer finish */
887 if ((!req->req.zero && (req->req.actual == req->req.length))
888 || (size % ep->ep.maxpacket)
889 || (size == 0)) {
890 pipe_stop(m66592, pipenum);
891 pipe_irq_disable(m66592, pipenum);
892 finish = 1;
893 }
894
895 /* read fifo */
896 if (req->req.buf) {
897 if (size == 0)
898 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
899 else
900 m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
901 }
902
903 if ((ep->pipenum != 0) && finish)
904 transfer_complete(ep, req, 0);
905 }
906
907 static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
908 {
909 u16 check;
910 u16 pipenum;
911 struct m66592_ep *ep;
912 struct m66592_request *req;
913
914 if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
915 m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
916 m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
917 M66592_CFIFOSEL);
918
919 ep = &m66592->ep[0];
920 req = list_entry(ep->queue.next, struct m66592_request, queue);
921 irq_packet_read(ep, req);
922 } else {
923 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
924 check = 1 << pipenum;
925 if ((status & check) && (enb & check)) {
926 m66592_write(m66592, ~check, M66592_BRDYSTS);
927 ep = m66592->pipenum2ep[pipenum];
928 req = list_entry(ep->queue.next,
929 struct m66592_request, queue);
930 if (ep->desc->bEndpointAddress & USB_DIR_IN)
931 irq_packet_write(ep, req);
932 else
933 irq_packet_read(ep, req);
934 }
935 }
936 }
937 }
938
939 static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
940 {
941 u16 tmp;
942 u16 check;
943 u16 pipenum;
944 struct m66592_ep *ep;
945 struct m66592_request *req;
946
947 if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
948 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
949
950 ep = &m66592->ep[0];
951 req = list_entry(ep->queue.next, struct m66592_request, queue);
952 irq_ep0_write(ep, req);
953 } else {
954 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
955 check = 1 << pipenum;
956 if ((status & check) && (enb & check)) {
957 m66592_write(m66592, ~check, M66592_BEMPSTS);
958 tmp = control_reg_get(m66592, pipenum);
959 if ((tmp & M66592_INBUFM) == 0) {
960 disable_irq_empty(m66592, pipenum);
961 pipe_irq_disable(m66592, pipenum);
962 pipe_stop(m66592, pipenum);
963 ep = m66592->pipenum2ep[pipenum];
964 req = list_entry(ep->queue.next,
965 struct m66592_request,
966 queue);
967 if (!list_empty(&ep->queue))
968 transfer_complete(ep, req, 0);
969 }
970 }
971 }
972 }
973 }
974
975 static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
976 __releases(m66592->lock)
977 __acquires(m66592->lock)
978 {
979 struct m66592_ep *ep;
980 u16 pid;
981 u16 status = 0;
982 u16 w_index = le16_to_cpu(ctrl->wIndex);
983
984 switch (ctrl->bRequestType & USB_RECIP_MASK) {
985 case USB_RECIP_DEVICE:
986 status = 1 << USB_DEVICE_SELF_POWERED;
987 break;
988 case USB_RECIP_INTERFACE:
989 status = 0;
990 break;
991 case USB_RECIP_ENDPOINT:
992 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
993 pid = control_reg_get_pid(m66592, ep->pipenum);
994 if (pid == M66592_PID_STALL)
995 status = 1 << USB_ENDPOINT_HALT;
996 else
997 status = 0;
998 break;
999 default:
1000 pipe_stall(m66592, 0);
1001 return; /* exit */
1002 }
1003
1004 m66592->ep0_data = cpu_to_le16(status);
1005 m66592->ep0_req->buf = &m66592->ep0_data;
1006 m66592->ep0_req->length = 2;
1007 /* AV: what happens if we get called again before that gets through? */
1008 spin_unlock(&m66592->lock);
1009 m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
1010 spin_lock(&m66592->lock);
1011 }
1012
1013 static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1014 {
1015 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1016 case USB_RECIP_DEVICE:
1017 control_end(m66592, 1);
1018 break;
1019 case USB_RECIP_INTERFACE:
1020 control_end(m66592, 1);
1021 break;
1022 case USB_RECIP_ENDPOINT: {
1023 struct m66592_ep *ep;
1024 struct m66592_request *req;
1025 u16 w_index = le16_to_cpu(ctrl->wIndex);
1026
1027 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1028 pipe_stop(m66592, ep->pipenum);
1029 control_reg_sqclr(m66592, ep->pipenum);
1030
1031 control_end(m66592, 1);
1032
1033 req = list_entry(ep->queue.next,
1034 struct m66592_request, queue);
1035 if (ep->busy) {
1036 ep->busy = 0;
1037 if (list_empty(&ep->queue))
1038 break;
1039 start_packet(ep, req);
1040 } else if (!list_empty(&ep->queue))
1041 pipe_start(m66592, ep->pipenum);
1042 }
1043 break;
1044 default:
1045 pipe_stall(m66592, 0);
1046 break;
1047 }
1048 }
1049
1050 static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1051 {
1052 u16 tmp;
1053 int timeout = 3000;
1054
1055 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1056 case USB_RECIP_DEVICE:
1057 switch (le16_to_cpu(ctrl->wValue)) {
1058 case USB_DEVICE_TEST_MODE:
1059 control_end(m66592, 1);
1060 /* Wait for the completion of status stage */
1061 do {
1062 tmp = m66592_read(m66592, M66592_INTSTS0) &
1063 M66592_CTSQ;
1064 udelay(1);
1065 } while (tmp != M66592_CS_IDST || timeout-- > 0);
1066
1067 if (tmp == M66592_CS_IDST)
1068 m66592_bset(m66592,
1069 le16_to_cpu(ctrl->wIndex >> 8),
1070 M66592_TESTMODE);
1071 break;
1072 default:
1073 pipe_stall(m66592, 0);
1074 break;
1075 }
1076 break;
1077 case USB_RECIP_INTERFACE:
1078 control_end(m66592, 1);
1079 break;
1080 case USB_RECIP_ENDPOINT: {
1081 struct m66592_ep *ep;
1082 u16 w_index = le16_to_cpu(ctrl->wIndex);
1083
1084 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1085 pipe_stall(m66592, ep->pipenum);
1086
1087 control_end(m66592, 1);
1088 }
1089 break;
1090 default:
1091 pipe_stall(m66592, 0);
1092 break;
1093 }
1094 }
1095
1096 /* if return value is true, call class driver's setup() */
1097 static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1098 {
1099 u16 *p = (u16 *)ctrl;
1100 unsigned long offset = M66592_USBREQ;
1101 int i, ret = 0;
1102
1103 /* read fifo */
1104 m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);
1105
1106 for (i = 0; i < 4; i++)
1107 p[i] = m66592_read(m66592, offset + i*2);
1108
1109 /* check request */
1110 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1111 switch (ctrl->bRequest) {
1112 case USB_REQ_GET_STATUS:
1113 get_status(m66592, ctrl);
1114 break;
1115 case USB_REQ_CLEAR_FEATURE:
1116 clear_feature(m66592, ctrl);
1117 break;
1118 case USB_REQ_SET_FEATURE:
1119 set_feature(m66592, ctrl);
1120 break;
1121 default:
1122 ret = 1;
1123 break;
1124 }
1125 } else
1126 ret = 1;
1127 return ret;
1128 }
1129
1130 static void m66592_update_usb_speed(struct m66592 *m66592)
1131 {
1132 u16 speed = get_usb_speed(m66592);
1133
1134 switch (speed) {
1135 case M66592_HSMODE:
1136 m66592->gadget.speed = USB_SPEED_HIGH;
1137 break;
1138 case M66592_FSMODE:
1139 m66592->gadget.speed = USB_SPEED_FULL;
1140 break;
1141 default:
1142 m66592->gadget.speed = USB_SPEED_UNKNOWN;
1143 pr_err("USB speed unknown\n");
1144 }
1145 }
1146
1147 static void irq_device_state(struct m66592 *m66592)
1148 {
1149 u16 dvsq;
1150
1151 dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
1152 m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);
1153
1154 if (dvsq == M66592_DS_DFLT) { /* bus reset */
1155 m66592->driver->disconnect(&m66592->gadget);
1156 m66592_update_usb_speed(m66592);
1157 }
1158 if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
1159 m66592_update_usb_speed(m66592);
1160 if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
1161 && m66592->gadget.speed == USB_SPEED_UNKNOWN)
1162 m66592_update_usb_speed(m66592);
1163
1164 m66592->old_dvsq = dvsq;
1165 }
1166
1167 static void irq_control_stage(struct m66592 *m66592)
1168 __releases(m66592->lock)
1169 __acquires(m66592->lock)
1170 {
1171 struct usb_ctrlrequest ctrl;
1172 u16 ctsq;
1173
1174 ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
1175 m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);
1176
1177 switch (ctsq) {
1178 case M66592_CS_IDST: {
1179 struct m66592_ep *ep;
1180 struct m66592_request *req;
1181 ep = &m66592->ep[0];
1182 req = list_entry(ep->queue.next, struct m66592_request, queue);
1183 transfer_complete(ep, req, 0);
1184 }
1185 break;
1186
1187 case M66592_CS_RDDS:
1188 case M66592_CS_WRDS:
1189 case M66592_CS_WRND:
1190 if (setup_packet(m66592, &ctrl)) {
1191 spin_unlock(&m66592->lock);
1192 if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
1193 pipe_stall(m66592, 0);
1194 spin_lock(&m66592->lock);
1195 }
1196 break;
1197 case M66592_CS_RDSS:
1198 case M66592_CS_WRSS:
1199 control_end(m66592, 0);
1200 break;
1201 default:
1202 pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1203 break;
1204 }
1205 }
1206
1207 static irqreturn_t m66592_irq(int irq, void *_m66592)
1208 {
1209 struct m66592 *m66592 = _m66592;
1210 u16 intsts0;
1211 u16 intenb0;
1212 u16 brdysts, nrdysts, bempsts;
1213 u16 brdyenb, nrdyenb, bempenb;
1214 u16 savepipe;
1215 u16 mask0;
1216
1217 spin_lock(&m66592->lock);
1218
1219 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1220 intenb0 = m66592_read(m66592, M66592_INTENB0);
1221
1222 if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
1223 /*
1224 * When USB clock stops, it cannot read register. Even if a
1225 * clock stops, the interrupt occurs. So this driver turn on
1226 * a clock by this timing and do re-reading of register.
1227 */
1228 m66592_start_xclock(m66592);
1229 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1230 intenb0 = m66592_read(m66592, M66592_INTENB0);
1231 }
1232
1233 savepipe = m66592_read(m66592, M66592_CFIFOSEL);
1234
1235 mask0 = intsts0 & intenb0;
1236 if (mask0) {
1237 brdysts = m66592_read(m66592, M66592_BRDYSTS);
1238 nrdysts = m66592_read(m66592, M66592_NRDYSTS);
1239 bempsts = m66592_read(m66592, M66592_BEMPSTS);
1240 brdyenb = m66592_read(m66592, M66592_BRDYENB);
1241 nrdyenb = m66592_read(m66592, M66592_NRDYENB);
1242 bempenb = m66592_read(m66592, M66592_BEMPENB);
1243
1244 if (mask0 & M66592_VBINT) {
1245 m66592_write(m66592, 0xffff & ~M66592_VBINT,
1246 M66592_INTSTS0);
1247 m66592_start_xclock(m66592);
1248
1249 /* start vbus sampling */
1250 m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
1251 & M66592_VBSTS;
1252 m66592->scount = M66592_MAX_SAMPLING;
1253
1254 mod_timer(&m66592->timer,
1255 jiffies + msecs_to_jiffies(50));
1256 }
1257 if (intsts0 & M66592_DVSQ)
1258 irq_device_state(m66592);
1259
1260 if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
1261 && (brdysts & brdyenb)) {
1262 irq_pipe_ready(m66592, brdysts, brdyenb);
1263 }
1264 if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
1265 && (bempsts & bempenb)) {
1266 irq_pipe_empty(m66592, bempsts, bempenb);
1267 }
1268
1269 if (intsts0 & M66592_CTRT)
1270 irq_control_stage(m66592);
1271 }
1272
1273 m66592_write(m66592, savepipe, M66592_CFIFOSEL);
1274
1275 spin_unlock(&m66592->lock);
1276 return IRQ_HANDLED;
1277 }
1278
1279 static void m66592_timer(unsigned long _m66592)
1280 {
1281 struct m66592 *m66592 = (struct m66592 *)_m66592;
1282 unsigned long flags;
1283 u16 tmp;
1284
1285 spin_lock_irqsave(&m66592->lock, flags);
1286 tmp = m66592_read(m66592, M66592_SYSCFG);
1287 if (!(tmp & M66592_RCKE)) {
1288 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
1289 udelay(10);
1290 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
1291 }
1292 if (m66592->scount > 0) {
1293 tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
1294 if (tmp == m66592->old_vbus) {
1295 m66592->scount--;
1296 if (m66592->scount == 0) {
1297 if (tmp == M66592_VBSTS)
1298 m66592_usb_connect(m66592);
1299 else
1300 m66592_usb_disconnect(m66592);
1301 } else {
1302 mod_timer(&m66592->timer,
1303 jiffies + msecs_to_jiffies(50));
1304 }
1305 } else {
1306 m66592->scount = M66592_MAX_SAMPLING;
1307 m66592->old_vbus = tmp;
1308 mod_timer(&m66592->timer,
1309 jiffies + msecs_to_jiffies(50));
1310 }
1311 }
1312 spin_unlock_irqrestore(&m66592->lock, flags);
1313 }
1314
1315 /*-------------------------------------------------------------------------*/
1316 static int m66592_enable(struct usb_ep *_ep,
1317 const struct usb_endpoint_descriptor *desc)
1318 {
1319 struct m66592_ep *ep;
1320
1321 ep = container_of(_ep, struct m66592_ep, ep);
1322 return alloc_pipe_config(ep, desc);
1323 }
1324
1325 static int m66592_disable(struct usb_ep *_ep)
1326 {
1327 struct m66592_ep *ep;
1328 struct m66592_request *req;
1329 unsigned long flags;
1330
1331 ep = container_of(_ep, struct m66592_ep, ep);
1332 BUG_ON(!ep);
1333
1334 while (!list_empty(&ep->queue)) {
1335 req = list_entry(ep->queue.next, struct m66592_request, queue);
1336 spin_lock_irqsave(&ep->m66592->lock, flags);
1337 transfer_complete(ep, req, -ECONNRESET);
1338 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1339 }
1340
1341 pipe_irq_disable(ep->m66592, ep->pipenum);
1342 return free_pipe_config(ep);
1343 }
1344
1345 static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
1346 gfp_t gfp_flags)
1347 {
1348 struct m66592_request *req;
1349
1350 req = kzalloc(sizeof(struct m66592_request), gfp_flags);
1351 if (!req)
1352 return NULL;
1353
1354 INIT_LIST_HEAD(&req->queue);
1355
1356 return &req->req;
1357 }
1358
1359 static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
1360 {
1361 struct m66592_request *req;
1362
1363 req = container_of(_req, struct m66592_request, req);
1364 kfree(req);
1365 }
1366
1367 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
1368 gfp_t gfp_flags)
1369 {
1370 struct m66592_ep *ep;
1371 struct m66592_request *req;
1372 unsigned long flags;
1373 int request = 0;
1374
1375 ep = container_of(_ep, struct m66592_ep, ep);
1376 req = container_of(_req, struct m66592_request, req);
1377
1378 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
1379 return -ESHUTDOWN;
1380
1381 spin_lock_irqsave(&ep->m66592->lock, flags);
1382
1383 if (list_empty(&ep->queue))
1384 request = 1;
1385
1386 list_add_tail(&req->queue, &ep->queue);
1387 req->req.actual = 0;
1388 req->req.status = -EINPROGRESS;
1389
1390 if (ep->desc == NULL) /* control */
1391 start_ep0(ep, req);
1392 else {
1393 if (request && !ep->busy)
1394 start_packet(ep, req);
1395 }
1396
1397 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1398
1399 return 0;
1400 }
1401
1402 static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1403 {
1404 struct m66592_ep *ep;
1405 struct m66592_request *req;
1406 unsigned long flags;
1407
1408 ep = container_of(_ep, struct m66592_ep, ep);
1409 req = container_of(_req, struct m66592_request, req);
1410
1411 spin_lock_irqsave(&ep->m66592->lock, flags);
1412 if (!list_empty(&ep->queue))
1413 transfer_complete(ep, req, -ECONNRESET);
1414 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1415
1416 return 0;
1417 }
1418
1419 static int m66592_set_halt(struct usb_ep *_ep, int value)
1420 {
1421 struct m66592_ep *ep;
1422 struct m66592_request *req;
1423 unsigned long flags;
1424 int ret = 0;
1425
1426 ep = container_of(_ep, struct m66592_ep, ep);
1427 req = list_entry(ep->queue.next, struct m66592_request, queue);
1428
1429 spin_lock_irqsave(&ep->m66592->lock, flags);
1430 if (!list_empty(&ep->queue)) {
1431 ret = -EAGAIN;
1432 goto out;
1433 }
1434 if (value) {
1435 ep->busy = 1;
1436 pipe_stall(ep->m66592, ep->pipenum);
1437 } else {
1438 ep->busy = 0;
1439 pipe_stop(ep->m66592, ep->pipenum);
1440 }
1441
1442 out:
1443 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1444 return ret;
1445 }
1446
1447 static void m66592_fifo_flush(struct usb_ep *_ep)
1448 {
1449 struct m66592_ep *ep;
1450 unsigned long flags;
1451
1452 ep = container_of(_ep, struct m66592_ep, ep);
1453 spin_lock_irqsave(&ep->m66592->lock, flags);
1454 if (list_empty(&ep->queue) && !ep->busy) {
1455 pipe_stop(ep->m66592, ep->pipenum);
1456 m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
1457 }
1458 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1459 }
1460
1461 static struct usb_ep_ops m66592_ep_ops = {
1462 .enable = m66592_enable,
1463 .disable = m66592_disable,
1464
1465 .alloc_request = m66592_alloc_request,
1466 .free_request = m66592_free_request,
1467
1468 .queue = m66592_queue,
1469 .dequeue = m66592_dequeue,
1470
1471 .set_halt = m66592_set_halt,
1472 .fifo_flush = m66592_fifo_flush,
1473 };
1474
1475 /*-------------------------------------------------------------------------*/
1476 static struct m66592 *the_controller;
1477
1478 static int m66592_start(struct usb_gadget_driver *driver,
1479 int (*bind)(struct usb_gadget *))
1480 {
1481 struct m66592 *m66592 = the_controller;
1482 int retval;
1483
1484 if (!driver
1485 || driver->speed != USB_SPEED_HIGH
1486 || !bind
1487 || !driver->setup)
1488 return -EINVAL;
1489 if (!m66592)
1490 return -ENODEV;
1491 if (m66592->driver)
1492 return -EBUSY;
1493
1494 /* hook up the driver */
1495 driver->driver.bus = NULL;
1496 m66592->driver = driver;
1497 m66592->gadget.dev.driver = &driver->driver;
1498
1499 retval = device_add(&m66592->gadget.dev);
1500 if (retval) {
1501 pr_err("device_add error (%d)\n", retval);
1502 goto error;
1503 }
1504
1505 retval = bind(&m66592->gadget);
1506 if (retval) {
1507 pr_err("bind to driver error (%d)\n", retval);
1508 device_del(&m66592->gadget.dev);
1509 goto error;
1510 }
1511
1512 m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1513 if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
1514 m66592_start_xclock(m66592);
1515 /* start vbus sampling */
1516 m66592->old_vbus = m66592_read(m66592,
1517 M66592_INTSTS0) & M66592_VBSTS;
1518 m66592->scount = M66592_MAX_SAMPLING;
1519 mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
1520 }
1521
1522 return 0;
1523
1524 error:
1525 m66592->driver = NULL;
1526 m66592->gadget.dev.driver = NULL;
1527
1528 return retval;
1529 }
1530
1531 static int m66592_stop(struct usb_gadget_driver *driver)
1532 {
1533 struct m66592 *m66592 = the_controller;
1534 unsigned long flags;
1535
1536 if (driver != m66592->driver || !driver->unbind)
1537 return -EINVAL;
1538
1539 spin_lock_irqsave(&m66592->lock, flags);
1540 if (m66592->gadget.speed != USB_SPEED_UNKNOWN)
1541 m66592_usb_disconnect(m66592);
1542 spin_unlock_irqrestore(&m66592->lock, flags);
1543
1544 m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1545
1546 driver->unbind(&m66592->gadget);
1547 m66592->gadget.dev.driver = NULL;
1548
1549 init_controller(m66592);
1550 disable_controller(m66592);
1551
1552 device_del(&m66592->gadget.dev);
1553 m66592->driver = NULL;
1554 return 0;
1555 }
1556
1557 /*-------------------------------------------------------------------------*/
1558 static int m66592_get_frame(struct usb_gadget *_gadget)
1559 {
1560 struct m66592 *m66592 = gadget_to_m66592(_gadget);
1561 return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
1562 }
1563
1564 static int m66592_pullup(struct usb_gadget *gadget, int is_on)
1565 {
1566 struct m66592 *m66592 = gadget_to_m66592(gadget);
1567 unsigned long flags;
1568
1569 spin_lock_irqsave(&m66592->lock, flags);
1570 if (is_on)
1571 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
1572 else
1573 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
1574 spin_unlock_irqrestore(&m66592->lock, flags);
1575
1576 return 0;
1577 }
1578
1579 static struct usb_gadget_ops m66592_gadget_ops = {
1580 .get_frame = m66592_get_frame,
1581 .start = m66592_start,
1582 .stop = m66592_stop,
1583 .pullup = m66592_pullup,
1584 };
1585
1586 static int __exit m66592_remove(struct platform_device *pdev)
1587 {
1588 struct m66592 *m66592 = dev_get_drvdata(&pdev->dev);
1589
1590 usb_del_gadget_udc(&m66592->gadget);
1591
1592 del_timer_sync(&m66592->timer);
1593 iounmap(m66592->reg);
1594 free_irq(platform_get_irq(pdev, 0), m66592);
1595 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1596 #ifdef CONFIG_HAVE_CLK
1597 if (m66592->pdata->on_chip) {
1598 clk_disable(m66592->clk);
1599 clk_put(m66592->clk);
1600 }
1601 #endif
1602 kfree(m66592);
1603 return 0;
1604 }
1605
1606 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1607 {
1608 }
1609
1610 static int __init m66592_probe(struct platform_device *pdev)
1611 {
1612 struct resource *res, *ires;
1613 void __iomem *reg = NULL;
1614 struct m66592 *m66592 = NULL;
1615 #ifdef CONFIG_HAVE_CLK
1616 char clk_name[8];
1617 #endif
1618 int ret = 0;
1619 int i;
1620
1621 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1622 if (!res) {
1623 ret = -ENODEV;
1624 pr_err("platform_get_resource error.\n");
1625 goto clean_up;
1626 }
1627
1628 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1629 if (!ires) {
1630 ret = -ENODEV;
1631 dev_err(&pdev->dev,
1632 "platform_get_resource IORESOURCE_IRQ error.\n");
1633 goto clean_up;
1634 }
1635
1636 reg = ioremap(res->start, resource_size(res));
1637 if (reg == NULL) {
1638 ret = -ENOMEM;
1639 pr_err("ioremap error.\n");
1640 goto clean_up;
1641 }
1642
1643 if (pdev->dev.platform_data == NULL) {
1644 dev_err(&pdev->dev, "no platform data\n");
1645 ret = -ENODEV;
1646 goto clean_up;
1647 }
1648
1649 /* initialize ucd */
1650 m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
1651 if (m66592 == NULL) {
1652 ret = -ENOMEM;
1653 pr_err("kzalloc error\n");
1654 goto clean_up;
1655 }
1656
1657 m66592->pdata = pdev->dev.platform_data;
1658 m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1659
1660 spin_lock_init(&m66592->lock);
1661 dev_set_drvdata(&pdev->dev, m66592);
1662
1663 m66592->gadget.ops = &m66592_gadget_ops;
1664 device_initialize(&m66592->gadget.dev);
1665 dev_set_name(&m66592->gadget.dev, "gadget");
1666 m66592->gadget.is_dualspeed = 1;
1667 m66592->gadget.dev.parent = &pdev->dev;
1668 m66592->gadget.dev.dma_mask = pdev->dev.dma_mask;
1669 m66592->gadget.dev.release = pdev->dev.release;
1670 m66592->gadget.name = udc_name;
1671
1672 init_timer(&m66592->timer);
1673 m66592->timer.function = m66592_timer;
1674 m66592->timer.data = (unsigned long)m66592;
1675 m66592->reg = reg;
1676
1677 ret = request_irq(ires->start, m66592_irq, IRQF_DISABLED | IRQF_SHARED,
1678 udc_name, m66592);
1679 if (ret < 0) {
1680 pr_err("request_irq error (%d)\n", ret);
1681 goto clean_up;
1682 }
1683
1684 #ifdef CONFIG_HAVE_CLK
1685 if (m66592->pdata->on_chip) {
1686 snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
1687 m66592->clk = clk_get(&pdev->dev, clk_name);
1688 if (IS_ERR(m66592->clk)) {
1689 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1690 clk_name);
1691 ret = PTR_ERR(m66592->clk);
1692 goto clean_up2;
1693 }
1694 clk_enable(m66592->clk);
1695 }
1696 #endif
1697 INIT_LIST_HEAD(&m66592->gadget.ep_list);
1698 m66592->gadget.ep0 = &m66592->ep[0].ep;
1699 INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
1700 for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
1701 struct m66592_ep *ep = &m66592->ep[i];
1702
1703 if (i != 0) {
1704 INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
1705 list_add_tail(&m66592->ep[i].ep.ep_list,
1706 &m66592->gadget.ep_list);
1707 }
1708 ep->m66592 = m66592;
1709 INIT_LIST_HEAD(&ep->queue);
1710 ep->ep.name = m66592_ep_name[i];
1711 ep->ep.ops = &m66592_ep_ops;
1712 ep->ep.maxpacket = 512;
1713 }
1714 m66592->ep[0].ep.maxpacket = 64;
1715 m66592->ep[0].pipenum = 0;
1716 m66592->ep[0].fifoaddr = M66592_CFIFO;
1717 m66592->ep[0].fifosel = M66592_CFIFOSEL;
1718 m66592->ep[0].fifoctr = M66592_CFIFOCTR;
1719 m66592->ep[0].fifotrn = 0;
1720 m66592->ep[0].pipectr = get_pipectr_addr(0);
1721 m66592->pipenum2ep[0] = &m66592->ep[0];
1722 m66592->epaddr2ep[0] = &m66592->ep[0];
1723
1724 the_controller = m66592;
1725
1726 m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
1727 if (m66592->ep0_req == NULL)
1728 goto clean_up3;
1729 m66592->ep0_req->complete = nop_completion;
1730
1731 init_controller(m66592);
1732
1733 ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
1734 if (ret)
1735 goto err_add_udc;
1736
1737 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1738 return 0;
1739
1740 err_add_udc:
1741 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1742
1743 clean_up3:
1744 #ifdef CONFIG_HAVE_CLK
1745 if (m66592->pdata->on_chip) {
1746 clk_disable(m66592->clk);
1747 clk_put(m66592->clk);
1748 }
1749 clean_up2:
1750 #endif
1751 free_irq(ires->start, m66592);
1752 clean_up:
1753 if (m66592) {
1754 if (m66592->ep0_req)
1755 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1756 kfree(m66592);
1757 }
1758 if (reg)
1759 iounmap(reg);
1760
1761 return ret;
1762 }
1763
1764 /*-------------------------------------------------------------------------*/
1765 static struct platform_driver m66592_driver = {
1766 .remove = __exit_p(m66592_remove),
1767 .driver = {
1768 .name = (char *) udc_name,
1769 .owner = THIS_MODULE,
1770 },
1771 };
1772
1773 static int __init m66592_udc_init(void)
1774 {
1775 return platform_driver_probe(&m66592_driver, m66592_probe);
1776 }
1777 module_init(m66592_udc_init);
1778
1779 static void __exit m66592_udc_cleanup(void)
1780 {
1781 platform_driver_unregister(&m66592_driver);
1782 }
1783 module_exit(m66592_udc_cleanup);
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