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[mirror_ubuntu-hirsute-kernel.git] / drivers / usb / gadget / udc / m66592-udc.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * M66592 UDC (USB gadget)
4 *
5 * Copyright (C) 2006-2007 Renesas Solutions Corp.
6 *
7 * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
8 */
9
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/delay.h>
13 #include <linux/io.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/err.h>
17 #include <linux/usb/ch9.h>
18 #include <linux/usb/gadget.h>
19
20 #include "m66592-udc.h"
21
22 MODULE_DESCRIPTION("M66592 USB gadget driver");
23 MODULE_LICENSE("GPL");
24 MODULE_AUTHOR("Yoshihiro Shimoda");
25 MODULE_ALIAS("platform:m66592_udc");
26
27 #define DRIVER_VERSION "21 July 2009"
28
29 static const char udc_name[] = "m66592_udc";
30 static const char *m66592_ep_name[] = {
31 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
32 };
33
34 static void disable_controller(struct m66592 *m66592);
35 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
36 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
37 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
38 gfp_t gfp_flags);
39
40 static void transfer_complete(struct m66592_ep *ep,
41 struct m66592_request *req, int status);
42
43 /*-------------------------------------------------------------------------*/
44 static inline u16 get_usb_speed(struct m66592 *m66592)
45 {
46 return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
47 }
48
49 static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
50 unsigned long reg)
51 {
52 u16 tmp;
53
54 tmp = m66592_read(m66592, M66592_INTENB0);
55 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
56 M66592_INTENB0);
57 m66592_bset(m66592, (1 << pipenum), reg);
58 m66592_write(m66592, tmp, M66592_INTENB0);
59 }
60
61 static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
62 unsigned long reg)
63 {
64 u16 tmp;
65
66 tmp = m66592_read(m66592, M66592_INTENB0);
67 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
68 M66592_INTENB0);
69 m66592_bclr(m66592, (1 << pipenum), reg);
70 m66592_write(m66592, tmp, M66592_INTENB0);
71 }
72
73 static void m66592_usb_connect(struct m66592 *m66592)
74 {
75 m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
76 m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
77 M66592_INTENB0);
78 m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
79
80 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
81 }
82
83 static void m66592_usb_disconnect(struct m66592 *m66592)
84 __releases(m66592->lock)
85 __acquires(m66592->lock)
86 {
87 m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
88 m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
89 M66592_INTENB0);
90 m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
91 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
92
93 m66592->gadget.speed = USB_SPEED_UNKNOWN;
94 spin_unlock(&m66592->lock);
95 m66592->driver->disconnect(&m66592->gadget);
96 spin_lock(&m66592->lock);
97
98 disable_controller(m66592);
99 INIT_LIST_HEAD(&m66592->ep[0].queue);
100 }
101
102 static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
103 {
104 u16 pid = 0;
105 unsigned long offset;
106
107 if (pipenum == 0)
108 pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
109 else if (pipenum < M66592_MAX_NUM_PIPE) {
110 offset = get_pipectr_addr(pipenum);
111 pid = m66592_read(m66592, offset) & M66592_PID;
112 } else
113 pr_err("unexpect pipe num (%d)\n", pipenum);
114
115 return pid;
116 }
117
118 static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
119 u16 pid)
120 {
121 unsigned long offset;
122
123 if (pipenum == 0)
124 m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
125 else if (pipenum < M66592_MAX_NUM_PIPE) {
126 offset = get_pipectr_addr(pipenum);
127 m66592_mdfy(m66592, pid, M66592_PID, offset);
128 } else
129 pr_err("unexpect pipe num (%d)\n", pipenum);
130 }
131
132 static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
133 {
134 control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
135 }
136
137 static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
138 {
139 control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
140 }
141
142 static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
143 {
144 control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
145 }
146
147 static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
148 {
149 u16 ret = 0;
150 unsigned long offset;
151
152 if (pipenum == 0)
153 ret = m66592_read(m66592, M66592_DCPCTR);
154 else if (pipenum < M66592_MAX_NUM_PIPE) {
155 offset = get_pipectr_addr(pipenum);
156 ret = m66592_read(m66592, offset);
157 } else
158 pr_err("unexpect pipe num (%d)\n", pipenum);
159
160 return ret;
161 }
162
163 static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
164 {
165 unsigned long offset;
166
167 pipe_stop(m66592, pipenum);
168
169 if (pipenum == 0)
170 m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
171 else if (pipenum < M66592_MAX_NUM_PIPE) {
172 offset = get_pipectr_addr(pipenum);
173 m66592_bset(m66592, M66592_SQCLR, offset);
174 } else
175 pr_err("unexpect pipe num(%d)\n", pipenum);
176 }
177
178 static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
179 {
180 u16 tmp;
181 int size;
182
183 if (pipenum == 0) {
184 tmp = m66592_read(m66592, M66592_DCPCFG);
185 if ((tmp & M66592_CNTMD) != 0)
186 size = 256;
187 else {
188 tmp = m66592_read(m66592, M66592_DCPMAXP);
189 size = tmp & M66592_MAXP;
190 }
191 } else {
192 m66592_write(m66592, pipenum, M66592_PIPESEL);
193 tmp = m66592_read(m66592, M66592_PIPECFG);
194 if ((tmp & M66592_CNTMD) != 0) {
195 tmp = m66592_read(m66592, M66592_PIPEBUF);
196 size = ((tmp >> 10) + 1) * 64;
197 } else {
198 tmp = m66592_read(m66592, M66592_PIPEMAXP);
199 size = tmp & M66592_MXPS;
200 }
201 }
202
203 return size;
204 }
205
206 static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
207 {
208 struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
209 unsigned short mbw;
210
211 if (ep->use_dma)
212 return;
213
214 m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);
215
216 ndelay(450);
217
218 if (m66592->pdata->on_chip)
219 mbw = M66592_MBW_32;
220 else
221 mbw = M66592_MBW_16;
222
223 m66592_bset(m66592, mbw, ep->fifosel);
224 }
225
226 static int pipe_buffer_setting(struct m66592 *m66592,
227 struct m66592_pipe_info *info)
228 {
229 u16 bufnum = 0, buf_bsize = 0;
230 u16 pipecfg = 0;
231
232 if (info->pipe == 0)
233 return -EINVAL;
234
235 m66592_write(m66592, info->pipe, M66592_PIPESEL);
236
237 if (info->dir_in)
238 pipecfg |= M66592_DIR;
239 pipecfg |= info->type;
240 pipecfg |= info->epnum;
241 switch (info->type) {
242 case M66592_INT:
243 bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
244 buf_bsize = 0;
245 break;
246 case M66592_BULK:
247 /* isochronous pipes may be used as bulk pipes */
248 if (info->pipe >= M66592_BASE_PIPENUM_BULK)
249 bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
250 else
251 bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;
252
253 bufnum = M66592_BASE_BUFNUM + (bufnum * 16);
254 buf_bsize = 7;
255 pipecfg |= M66592_DBLB;
256 if (!info->dir_in)
257 pipecfg |= M66592_SHTNAK;
258 break;
259 case M66592_ISO:
260 bufnum = M66592_BASE_BUFNUM +
261 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
262 buf_bsize = 7;
263 break;
264 }
265
266 if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) {
267 pr_err("m66592 pipe memory is insufficient\n");
268 return -ENOMEM;
269 }
270
271 m66592_write(m66592, pipecfg, M66592_PIPECFG);
272 m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
273 m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
274 if (info->interval)
275 info->interval--;
276 m66592_write(m66592, info->interval, M66592_PIPEPERI);
277
278 return 0;
279 }
280
281 static void pipe_buffer_release(struct m66592 *m66592,
282 struct m66592_pipe_info *info)
283 {
284 if (info->pipe == 0)
285 return;
286
287 if (is_bulk_pipe(info->pipe)) {
288 m66592->bulk--;
289 } else if (is_interrupt_pipe(info->pipe))
290 m66592->interrupt--;
291 else if (is_isoc_pipe(info->pipe)) {
292 m66592->isochronous--;
293 if (info->type == M66592_BULK)
294 m66592->bulk--;
295 } else
296 pr_err("ep_release: unexpect pipenum (%d)\n",
297 info->pipe);
298 }
299
300 static void pipe_initialize(struct m66592_ep *ep)
301 {
302 struct m66592 *m66592 = ep->m66592;
303 unsigned short mbw;
304
305 m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
306
307 m66592_write(m66592, M66592_ACLRM, ep->pipectr);
308 m66592_write(m66592, 0, ep->pipectr);
309 m66592_write(m66592, M66592_SQCLR, ep->pipectr);
310 if (ep->use_dma) {
311 m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);
312
313 ndelay(450);
314
315 if (m66592->pdata->on_chip)
316 mbw = M66592_MBW_32;
317 else
318 mbw = M66592_MBW_16;
319
320 m66592_bset(m66592, mbw, ep->fifosel);
321 }
322 }
323
324 static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
325 const struct usb_endpoint_descriptor *desc,
326 u16 pipenum, int dma)
327 {
328 if ((pipenum != 0) && dma) {
329 if (m66592->num_dma == 0) {
330 m66592->num_dma++;
331 ep->use_dma = 1;
332 ep->fifoaddr = M66592_D0FIFO;
333 ep->fifosel = M66592_D0FIFOSEL;
334 ep->fifoctr = M66592_D0FIFOCTR;
335 ep->fifotrn = M66592_D0FIFOTRN;
336 } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
337 m66592->num_dma++;
338 ep->use_dma = 1;
339 ep->fifoaddr = M66592_D1FIFO;
340 ep->fifosel = M66592_D1FIFOSEL;
341 ep->fifoctr = M66592_D1FIFOCTR;
342 ep->fifotrn = M66592_D1FIFOTRN;
343 } else {
344 ep->use_dma = 0;
345 ep->fifoaddr = M66592_CFIFO;
346 ep->fifosel = M66592_CFIFOSEL;
347 ep->fifoctr = M66592_CFIFOCTR;
348 ep->fifotrn = 0;
349 }
350 } else {
351 ep->use_dma = 0;
352 ep->fifoaddr = M66592_CFIFO;
353 ep->fifosel = M66592_CFIFOSEL;
354 ep->fifoctr = M66592_CFIFOCTR;
355 ep->fifotrn = 0;
356 }
357
358 ep->pipectr = get_pipectr_addr(pipenum);
359 ep->pipenum = pipenum;
360 ep->ep.maxpacket = usb_endpoint_maxp(desc);
361 m66592->pipenum2ep[pipenum] = ep;
362 m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
363 INIT_LIST_HEAD(&ep->queue);
364 }
365
366 static void m66592_ep_release(struct m66592_ep *ep)
367 {
368 struct m66592 *m66592 = ep->m66592;
369 u16 pipenum = ep->pipenum;
370
371 if (pipenum == 0)
372 return;
373
374 if (ep->use_dma)
375 m66592->num_dma--;
376 ep->pipenum = 0;
377 ep->busy = 0;
378 ep->use_dma = 0;
379 }
380
381 static int alloc_pipe_config(struct m66592_ep *ep,
382 const struct usb_endpoint_descriptor *desc)
383 {
384 struct m66592 *m66592 = ep->m66592;
385 struct m66592_pipe_info info;
386 int dma = 0;
387 int *counter;
388 int ret;
389
390 ep->ep.desc = desc;
391
392 BUG_ON(ep->pipenum);
393
394 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
395 case USB_ENDPOINT_XFER_BULK:
396 if (m66592->bulk >= M66592_MAX_NUM_BULK) {
397 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
398 pr_err("bulk pipe is insufficient\n");
399 return -ENODEV;
400 } else {
401 info.pipe = M66592_BASE_PIPENUM_ISOC
402 + m66592->isochronous;
403 counter = &m66592->isochronous;
404 }
405 } else {
406 info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
407 counter = &m66592->bulk;
408 }
409 info.type = M66592_BULK;
410 dma = 1;
411 break;
412 case USB_ENDPOINT_XFER_INT:
413 if (m66592->interrupt >= M66592_MAX_NUM_INT) {
414 pr_err("interrupt pipe is insufficient\n");
415 return -ENODEV;
416 }
417 info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
418 info.type = M66592_INT;
419 counter = &m66592->interrupt;
420 break;
421 case USB_ENDPOINT_XFER_ISOC:
422 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
423 pr_err("isochronous pipe is insufficient\n");
424 return -ENODEV;
425 }
426 info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
427 info.type = M66592_ISO;
428 counter = &m66592->isochronous;
429 break;
430 default:
431 pr_err("unexpect xfer type\n");
432 return -EINVAL;
433 }
434 ep->type = info.type;
435
436 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
437 info.maxpacket = usb_endpoint_maxp(desc);
438 info.interval = desc->bInterval;
439 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
440 info.dir_in = 1;
441 else
442 info.dir_in = 0;
443
444 ret = pipe_buffer_setting(m66592, &info);
445 if (ret < 0) {
446 pr_err("pipe_buffer_setting fail\n");
447 return ret;
448 }
449
450 (*counter)++;
451 if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
452 m66592->bulk++;
453
454 m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
455 pipe_initialize(ep);
456
457 return 0;
458 }
459
460 static int free_pipe_config(struct m66592_ep *ep)
461 {
462 struct m66592 *m66592 = ep->m66592;
463 struct m66592_pipe_info info;
464
465 info.pipe = ep->pipenum;
466 info.type = ep->type;
467 pipe_buffer_release(m66592, &info);
468 m66592_ep_release(ep);
469
470 return 0;
471 }
472
473 /*-------------------------------------------------------------------------*/
474 static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
475 {
476 enable_irq_ready(m66592, pipenum);
477 enable_irq_nrdy(m66592, pipenum);
478 }
479
480 static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
481 {
482 disable_irq_ready(m66592, pipenum);
483 disable_irq_nrdy(m66592, pipenum);
484 }
485
486 /* if complete is true, gadget driver complete function is not call */
487 static void control_end(struct m66592 *m66592, unsigned ccpl)
488 {
489 m66592->ep[0].internal_ccpl = ccpl;
490 pipe_start(m66592, 0);
491 m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
492 }
493
494 static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
495 {
496 struct m66592 *m66592 = ep->m66592;
497
498 pipe_change(m66592, ep->pipenum);
499 m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
500 (M66592_ISEL | M66592_CURPIPE),
501 M66592_CFIFOSEL);
502 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
503 if (req->req.length == 0) {
504 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
505 pipe_start(m66592, 0);
506 transfer_complete(ep, req, 0);
507 } else {
508 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
509 irq_ep0_write(ep, req);
510 }
511 }
512
513 static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
514 {
515 struct m66592 *m66592 = ep->m66592;
516 u16 tmp;
517
518 pipe_change(m66592, ep->pipenum);
519 disable_irq_empty(m66592, ep->pipenum);
520 pipe_start(m66592, ep->pipenum);
521
522 tmp = m66592_read(m66592, ep->fifoctr);
523 if (unlikely((tmp & M66592_FRDY) == 0))
524 pipe_irq_enable(m66592, ep->pipenum);
525 else
526 irq_packet_write(ep, req);
527 }
528
529 static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
530 {
531 struct m66592 *m66592 = ep->m66592;
532 u16 pipenum = ep->pipenum;
533
534 if (ep->pipenum == 0) {
535 m66592_mdfy(m66592, M66592_PIPE0,
536 (M66592_ISEL | M66592_CURPIPE),
537 M66592_CFIFOSEL);
538 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
539 pipe_start(m66592, pipenum);
540 pipe_irq_enable(m66592, pipenum);
541 } else {
542 if (ep->use_dma) {
543 m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
544 pipe_change(m66592, pipenum);
545 m66592_bset(m66592, M66592_TRENB, ep->fifosel);
546 m66592_write(m66592,
547 (req->req.length + ep->ep.maxpacket - 1)
548 / ep->ep.maxpacket,
549 ep->fifotrn);
550 }
551 pipe_start(m66592, pipenum); /* trigger once */
552 pipe_irq_enable(m66592, pipenum);
553 }
554 }
555
556 static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
557 {
558 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
559 start_packet_write(ep, req);
560 else
561 start_packet_read(ep, req);
562 }
563
564 static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
565 {
566 u16 ctsq;
567
568 ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;
569
570 switch (ctsq) {
571 case M66592_CS_RDDS:
572 start_ep0_write(ep, req);
573 break;
574 case M66592_CS_WRDS:
575 start_packet_read(ep, req);
576 break;
577
578 case M66592_CS_WRND:
579 control_end(ep->m66592, 0);
580 break;
581 default:
582 pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
583 break;
584 }
585 }
586
587 static void init_controller(struct m66592 *m66592)
588 {
589 unsigned int endian;
590
591 if (m66592->pdata->on_chip) {
592 if (m66592->pdata->endian)
593 endian = 0; /* big endian */
594 else
595 endian = M66592_LITTLE; /* little endian */
596
597 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
598 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
599 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
600 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
601
602 /* This is a workaound for SH7722 2nd cut */
603 m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
604 m66592_bset(m66592, 0x1000, M66592_TESTMODE);
605 m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
606
607 m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
608
609 m66592_write(m66592, 0, M66592_CFBCFG);
610 m66592_write(m66592, 0, M66592_D0FBCFG);
611 m66592_bset(m66592, endian, M66592_CFBCFG);
612 m66592_bset(m66592, endian, M66592_D0FBCFG);
613 } else {
614 unsigned int clock, vif, irq_sense;
615
616 if (m66592->pdata->endian)
617 endian = M66592_BIGEND; /* big endian */
618 else
619 endian = 0; /* little endian */
620
621 if (m66592->pdata->vif)
622 vif = M66592_LDRV; /* 3.3v */
623 else
624 vif = 0; /* 1.5v */
625
626 switch (m66592->pdata->xtal) {
627 case M66592_PLATDATA_XTAL_12MHZ:
628 clock = M66592_XTAL12;
629 break;
630 case M66592_PLATDATA_XTAL_24MHZ:
631 clock = M66592_XTAL24;
632 break;
633 case M66592_PLATDATA_XTAL_48MHZ:
634 clock = M66592_XTAL48;
635 break;
636 default:
637 pr_warn("m66592-udc: xtal configuration error\n");
638 clock = 0;
639 }
640
641 switch (m66592->irq_trigger) {
642 case IRQF_TRIGGER_LOW:
643 irq_sense = M66592_INTL;
644 break;
645 case IRQF_TRIGGER_FALLING:
646 irq_sense = 0;
647 break;
648 default:
649 pr_warn("m66592-udc: irq trigger config error\n");
650 irq_sense = 0;
651 }
652
653 m66592_bset(m66592,
654 (vif & M66592_LDRV) | (endian & M66592_BIGEND),
655 M66592_PINCFG);
656 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
657 m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
658 M66592_SYSCFG);
659 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
660 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
661 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
662
663 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
664
665 msleep(3);
666
667 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
668
669 msleep(1);
670
671 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
672
673 m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
674 m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
675 M66592_DMA0CFG);
676 }
677 }
678
679 static void disable_controller(struct m66592 *m66592)
680 {
681 m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE);
682 if (!m66592->pdata->on_chip) {
683 m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
684 udelay(1);
685 m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
686 udelay(1);
687 m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
688 udelay(1);
689 m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
690 }
691 }
692
693 static void m66592_start_xclock(struct m66592 *m66592)
694 {
695 u16 tmp;
696
697 if (!m66592->pdata->on_chip) {
698 tmp = m66592_read(m66592, M66592_SYSCFG);
699 if (!(tmp & M66592_XCKE))
700 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
701 }
702 }
703
704 /*-------------------------------------------------------------------------*/
705 static void transfer_complete(struct m66592_ep *ep,
706 struct m66592_request *req, int status)
707 __releases(m66592->lock)
708 __acquires(m66592->lock)
709 {
710 int restart = 0;
711
712 if (unlikely(ep->pipenum == 0)) {
713 if (ep->internal_ccpl) {
714 ep->internal_ccpl = 0;
715 return;
716 }
717 }
718
719 list_del_init(&req->queue);
720 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
721 req->req.status = -ESHUTDOWN;
722 else
723 req->req.status = status;
724
725 if (!list_empty(&ep->queue))
726 restart = 1;
727
728 spin_unlock(&ep->m66592->lock);
729 usb_gadget_giveback_request(&ep->ep, &req->req);
730 spin_lock(&ep->m66592->lock);
731
732 if (restart) {
733 req = list_entry(ep->queue.next, struct m66592_request, queue);
734 if (ep->ep.desc)
735 start_packet(ep, req);
736 }
737 }
738
739 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
740 {
741 int i;
742 u16 tmp;
743 unsigned bufsize;
744 size_t size;
745 void *buf;
746 u16 pipenum = ep->pipenum;
747 struct m66592 *m66592 = ep->m66592;
748
749 pipe_change(m66592, pipenum);
750 m66592_bset(m66592, M66592_ISEL, ep->fifosel);
751
752 i = 0;
753 do {
754 tmp = m66592_read(m66592, ep->fifoctr);
755 if (i++ > 100000) {
756 pr_err("pipe0 is busy. maybe cpu i/o bus "
757 "conflict. please power off this controller.");
758 return;
759 }
760 ndelay(1);
761 } while ((tmp & M66592_FRDY) == 0);
762
763 /* prepare parameters */
764 bufsize = get_buffer_size(m66592, pipenum);
765 buf = req->req.buf + req->req.actual;
766 size = min(bufsize, req->req.length - req->req.actual);
767
768 /* write fifo */
769 if (req->req.buf) {
770 if (size > 0)
771 m66592_write_fifo(m66592, ep, buf, size);
772 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
773 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
774 }
775
776 /* update parameters */
777 req->req.actual += size;
778
779 /* check transfer finish */
780 if ((!req->req.zero && (req->req.actual == req->req.length))
781 || (size % ep->ep.maxpacket)
782 || (size == 0)) {
783 disable_irq_ready(m66592, pipenum);
784 disable_irq_empty(m66592, pipenum);
785 } else {
786 disable_irq_ready(m66592, pipenum);
787 enable_irq_empty(m66592, pipenum);
788 }
789 pipe_start(m66592, pipenum);
790 }
791
792 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
793 {
794 u16 tmp;
795 unsigned bufsize;
796 size_t size;
797 void *buf;
798 u16 pipenum = ep->pipenum;
799 struct m66592 *m66592 = ep->m66592;
800
801 pipe_change(m66592, pipenum);
802 tmp = m66592_read(m66592, ep->fifoctr);
803 if (unlikely((tmp & M66592_FRDY) == 0)) {
804 pipe_stop(m66592, pipenum);
805 pipe_irq_disable(m66592, pipenum);
806 pr_err("write fifo not ready. pipnum=%d\n", pipenum);
807 return;
808 }
809
810 /* prepare parameters */
811 bufsize = get_buffer_size(m66592, pipenum);
812 buf = req->req.buf + req->req.actual;
813 size = min(bufsize, req->req.length - req->req.actual);
814
815 /* write fifo */
816 if (req->req.buf) {
817 m66592_write_fifo(m66592, ep, buf, size);
818 if ((size == 0)
819 || ((size % ep->ep.maxpacket) != 0)
820 || ((bufsize != ep->ep.maxpacket)
821 && (bufsize > size)))
822 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
823 }
824
825 /* update parameters */
826 req->req.actual += size;
827 /* check transfer finish */
828 if ((!req->req.zero && (req->req.actual == req->req.length))
829 || (size % ep->ep.maxpacket)
830 || (size == 0)) {
831 disable_irq_ready(m66592, pipenum);
832 enable_irq_empty(m66592, pipenum);
833 } else {
834 disable_irq_empty(m66592, pipenum);
835 pipe_irq_enable(m66592, pipenum);
836 }
837 }
838
839 static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
840 {
841 u16 tmp;
842 int rcv_len, bufsize, req_len;
843 int size;
844 void *buf;
845 u16 pipenum = ep->pipenum;
846 struct m66592 *m66592 = ep->m66592;
847 int finish = 0;
848
849 pipe_change(m66592, pipenum);
850 tmp = m66592_read(m66592, ep->fifoctr);
851 if (unlikely((tmp & M66592_FRDY) == 0)) {
852 req->req.status = -EPIPE;
853 pipe_stop(m66592, pipenum);
854 pipe_irq_disable(m66592, pipenum);
855 pr_err("read fifo not ready");
856 return;
857 }
858
859 /* prepare parameters */
860 rcv_len = tmp & M66592_DTLN;
861 bufsize = get_buffer_size(m66592, pipenum);
862
863 buf = req->req.buf + req->req.actual;
864 req_len = req->req.length - req->req.actual;
865 if (rcv_len < bufsize)
866 size = min(rcv_len, req_len);
867 else
868 size = min(bufsize, req_len);
869
870 /* update parameters */
871 req->req.actual += size;
872
873 /* check transfer finish */
874 if ((!req->req.zero && (req->req.actual == req->req.length))
875 || (size % ep->ep.maxpacket)
876 || (size == 0)) {
877 pipe_stop(m66592, pipenum);
878 pipe_irq_disable(m66592, pipenum);
879 finish = 1;
880 }
881
882 /* read fifo */
883 if (req->req.buf) {
884 if (size == 0)
885 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
886 else
887 m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
888 }
889
890 if ((ep->pipenum != 0) && finish)
891 transfer_complete(ep, req, 0);
892 }
893
894 static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
895 {
896 u16 check;
897 u16 pipenum;
898 struct m66592_ep *ep;
899 struct m66592_request *req;
900
901 if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
902 m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
903 m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
904 M66592_CFIFOSEL);
905
906 ep = &m66592->ep[0];
907 req = list_entry(ep->queue.next, struct m66592_request, queue);
908 irq_packet_read(ep, req);
909 } else {
910 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
911 check = 1 << pipenum;
912 if ((status & check) && (enb & check)) {
913 m66592_write(m66592, ~check, M66592_BRDYSTS);
914 ep = m66592->pipenum2ep[pipenum];
915 req = list_entry(ep->queue.next,
916 struct m66592_request, queue);
917 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
918 irq_packet_write(ep, req);
919 else
920 irq_packet_read(ep, req);
921 }
922 }
923 }
924 }
925
926 static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
927 {
928 u16 tmp;
929 u16 check;
930 u16 pipenum;
931 struct m66592_ep *ep;
932 struct m66592_request *req;
933
934 if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
935 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
936
937 ep = &m66592->ep[0];
938 req = list_entry(ep->queue.next, struct m66592_request, queue);
939 irq_ep0_write(ep, req);
940 } else {
941 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
942 check = 1 << pipenum;
943 if ((status & check) && (enb & check)) {
944 m66592_write(m66592, ~check, M66592_BEMPSTS);
945 tmp = control_reg_get(m66592, pipenum);
946 if ((tmp & M66592_INBUFM) == 0) {
947 disable_irq_empty(m66592, pipenum);
948 pipe_irq_disable(m66592, pipenum);
949 pipe_stop(m66592, pipenum);
950 ep = m66592->pipenum2ep[pipenum];
951 req = list_entry(ep->queue.next,
952 struct m66592_request,
953 queue);
954 if (!list_empty(&ep->queue))
955 transfer_complete(ep, req, 0);
956 }
957 }
958 }
959 }
960 }
961
962 static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
963 __releases(m66592->lock)
964 __acquires(m66592->lock)
965 {
966 struct m66592_ep *ep;
967 u16 pid;
968 u16 status = 0;
969 u16 w_index = le16_to_cpu(ctrl->wIndex);
970
971 switch (ctrl->bRequestType & USB_RECIP_MASK) {
972 case USB_RECIP_DEVICE:
973 status = 1 << USB_DEVICE_SELF_POWERED;
974 break;
975 case USB_RECIP_INTERFACE:
976 status = 0;
977 break;
978 case USB_RECIP_ENDPOINT:
979 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
980 pid = control_reg_get_pid(m66592, ep->pipenum);
981 if (pid == M66592_PID_STALL)
982 status = 1 << USB_ENDPOINT_HALT;
983 else
984 status = 0;
985 break;
986 default:
987 pipe_stall(m66592, 0);
988 return; /* exit */
989 }
990
991 m66592->ep0_data = cpu_to_le16(status);
992 m66592->ep0_req->buf = &m66592->ep0_data;
993 m66592->ep0_req->length = 2;
994 /* AV: what happens if we get called again before that gets through? */
995 spin_unlock(&m66592->lock);
996 m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
997 spin_lock(&m66592->lock);
998 }
999
1000 static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1001 {
1002 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1003 case USB_RECIP_DEVICE:
1004 control_end(m66592, 1);
1005 break;
1006 case USB_RECIP_INTERFACE:
1007 control_end(m66592, 1);
1008 break;
1009 case USB_RECIP_ENDPOINT: {
1010 struct m66592_ep *ep;
1011 struct m66592_request *req;
1012 u16 w_index = le16_to_cpu(ctrl->wIndex);
1013
1014 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1015 pipe_stop(m66592, ep->pipenum);
1016 control_reg_sqclr(m66592, ep->pipenum);
1017
1018 control_end(m66592, 1);
1019
1020 req = list_entry(ep->queue.next,
1021 struct m66592_request, queue);
1022 if (ep->busy) {
1023 ep->busy = 0;
1024 if (list_empty(&ep->queue))
1025 break;
1026 start_packet(ep, req);
1027 } else if (!list_empty(&ep->queue))
1028 pipe_start(m66592, ep->pipenum);
1029 }
1030 break;
1031 default:
1032 pipe_stall(m66592, 0);
1033 break;
1034 }
1035 }
1036
1037 static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1038 {
1039 u16 tmp;
1040 int timeout = 3000;
1041
1042 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1043 case USB_RECIP_DEVICE:
1044 switch (le16_to_cpu(ctrl->wValue)) {
1045 case USB_DEVICE_TEST_MODE:
1046 control_end(m66592, 1);
1047 /* Wait for the completion of status stage */
1048 do {
1049 tmp = m66592_read(m66592, M66592_INTSTS0) &
1050 M66592_CTSQ;
1051 udelay(1);
1052 } while (tmp != M66592_CS_IDST && timeout-- > 0);
1053
1054 if (tmp == M66592_CS_IDST)
1055 m66592_bset(m66592,
1056 le16_to_cpu(ctrl->wIndex >> 8),
1057 M66592_TESTMODE);
1058 break;
1059 default:
1060 pipe_stall(m66592, 0);
1061 break;
1062 }
1063 break;
1064 case USB_RECIP_INTERFACE:
1065 control_end(m66592, 1);
1066 break;
1067 case USB_RECIP_ENDPOINT: {
1068 struct m66592_ep *ep;
1069 u16 w_index = le16_to_cpu(ctrl->wIndex);
1070
1071 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1072 pipe_stall(m66592, ep->pipenum);
1073
1074 control_end(m66592, 1);
1075 }
1076 break;
1077 default:
1078 pipe_stall(m66592, 0);
1079 break;
1080 }
1081 }
1082
1083 /* if return value is true, call class driver's setup() */
1084 static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1085 {
1086 u16 *p = (u16 *)ctrl;
1087 unsigned long offset = M66592_USBREQ;
1088 int i, ret = 0;
1089
1090 /* read fifo */
1091 m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);
1092
1093 for (i = 0; i < 4; i++)
1094 p[i] = m66592_read(m66592, offset + i*2);
1095
1096 /* check request */
1097 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1098 switch (ctrl->bRequest) {
1099 case USB_REQ_GET_STATUS:
1100 get_status(m66592, ctrl);
1101 break;
1102 case USB_REQ_CLEAR_FEATURE:
1103 clear_feature(m66592, ctrl);
1104 break;
1105 case USB_REQ_SET_FEATURE:
1106 set_feature(m66592, ctrl);
1107 break;
1108 default:
1109 ret = 1;
1110 break;
1111 }
1112 } else
1113 ret = 1;
1114 return ret;
1115 }
1116
1117 static void m66592_update_usb_speed(struct m66592 *m66592)
1118 {
1119 u16 speed = get_usb_speed(m66592);
1120
1121 switch (speed) {
1122 case M66592_HSMODE:
1123 m66592->gadget.speed = USB_SPEED_HIGH;
1124 break;
1125 case M66592_FSMODE:
1126 m66592->gadget.speed = USB_SPEED_FULL;
1127 break;
1128 default:
1129 m66592->gadget.speed = USB_SPEED_UNKNOWN;
1130 pr_err("USB speed unknown\n");
1131 }
1132 }
1133
1134 static void irq_device_state(struct m66592 *m66592)
1135 {
1136 u16 dvsq;
1137
1138 dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
1139 m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);
1140
1141 if (dvsq == M66592_DS_DFLT) { /* bus reset */
1142 usb_gadget_udc_reset(&m66592->gadget, m66592->driver);
1143 m66592_update_usb_speed(m66592);
1144 }
1145 if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
1146 m66592_update_usb_speed(m66592);
1147 if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
1148 && m66592->gadget.speed == USB_SPEED_UNKNOWN)
1149 m66592_update_usb_speed(m66592);
1150
1151 m66592->old_dvsq = dvsq;
1152 }
1153
1154 static void irq_control_stage(struct m66592 *m66592)
1155 __releases(m66592->lock)
1156 __acquires(m66592->lock)
1157 {
1158 struct usb_ctrlrequest ctrl;
1159 u16 ctsq;
1160
1161 ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
1162 m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);
1163
1164 switch (ctsq) {
1165 case M66592_CS_IDST: {
1166 struct m66592_ep *ep;
1167 struct m66592_request *req;
1168 ep = &m66592->ep[0];
1169 req = list_entry(ep->queue.next, struct m66592_request, queue);
1170 transfer_complete(ep, req, 0);
1171 }
1172 break;
1173
1174 case M66592_CS_RDDS:
1175 case M66592_CS_WRDS:
1176 case M66592_CS_WRND:
1177 if (setup_packet(m66592, &ctrl)) {
1178 spin_unlock(&m66592->lock);
1179 if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
1180 pipe_stall(m66592, 0);
1181 spin_lock(&m66592->lock);
1182 }
1183 break;
1184 case M66592_CS_RDSS:
1185 case M66592_CS_WRSS:
1186 control_end(m66592, 0);
1187 break;
1188 default:
1189 pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1190 break;
1191 }
1192 }
1193
1194 static irqreturn_t m66592_irq(int irq, void *_m66592)
1195 {
1196 struct m66592 *m66592 = _m66592;
1197 u16 intsts0;
1198 u16 intenb0;
1199 u16 savepipe;
1200 u16 mask0;
1201
1202 spin_lock(&m66592->lock);
1203
1204 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1205 intenb0 = m66592_read(m66592, M66592_INTENB0);
1206
1207 if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
1208 /*
1209 * When USB clock stops, it cannot read register. Even if a
1210 * clock stops, the interrupt occurs. So this driver turn on
1211 * a clock by this timing and do re-reading of register.
1212 */
1213 m66592_start_xclock(m66592);
1214 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1215 intenb0 = m66592_read(m66592, M66592_INTENB0);
1216 }
1217
1218 savepipe = m66592_read(m66592, M66592_CFIFOSEL);
1219
1220 mask0 = intsts0 & intenb0;
1221 if (mask0) {
1222 u16 brdysts = m66592_read(m66592, M66592_BRDYSTS);
1223 u16 bempsts = m66592_read(m66592, M66592_BEMPSTS);
1224 u16 brdyenb = m66592_read(m66592, M66592_BRDYENB);
1225 u16 bempenb = m66592_read(m66592, M66592_BEMPENB);
1226
1227 if (mask0 & M66592_VBINT) {
1228 m66592_write(m66592, 0xffff & ~M66592_VBINT,
1229 M66592_INTSTS0);
1230 m66592_start_xclock(m66592);
1231
1232 /* start vbus sampling */
1233 m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
1234 & M66592_VBSTS;
1235 m66592->scount = M66592_MAX_SAMPLING;
1236
1237 mod_timer(&m66592->timer,
1238 jiffies + msecs_to_jiffies(50));
1239 }
1240 if (intsts0 & M66592_DVSQ)
1241 irq_device_state(m66592);
1242
1243 if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
1244 && (brdysts & brdyenb)) {
1245 irq_pipe_ready(m66592, brdysts, brdyenb);
1246 }
1247 if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
1248 && (bempsts & bempenb)) {
1249 irq_pipe_empty(m66592, bempsts, bempenb);
1250 }
1251
1252 if (intsts0 & M66592_CTRT)
1253 irq_control_stage(m66592);
1254 }
1255
1256 m66592_write(m66592, savepipe, M66592_CFIFOSEL);
1257
1258 spin_unlock(&m66592->lock);
1259 return IRQ_HANDLED;
1260 }
1261
1262 static void m66592_timer(unsigned long _m66592)
1263 {
1264 struct m66592 *m66592 = (struct m66592 *)_m66592;
1265 unsigned long flags;
1266 u16 tmp;
1267
1268 spin_lock_irqsave(&m66592->lock, flags);
1269 tmp = m66592_read(m66592, M66592_SYSCFG);
1270 if (!(tmp & M66592_RCKE)) {
1271 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
1272 udelay(10);
1273 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
1274 }
1275 if (m66592->scount > 0) {
1276 tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
1277 if (tmp == m66592->old_vbus) {
1278 m66592->scount--;
1279 if (m66592->scount == 0) {
1280 if (tmp == M66592_VBSTS)
1281 m66592_usb_connect(m66592);
1282 else
1283 m66592_usb_disconnect(m66592);
1284 } else {
1285 mod_timer(&m66592->timer,
1286 jiffies + msecs_to_jiffies(50));
1287 }
1288 } else {
1289 m66592->scount = M66592_MAX_SAMPLING;
1290 m66592->old_vbus = tmp;
1291 mod_timer(&m66592->timer,
1292 jiffies + msecs_to_jiffies(50));
1293 }
1294 }
1295 spin_unlock_irqrestore(&m66592->lock, flags);
1296 }
1297
1298 /*-------------------------------------------------------------------------*/
1299 static int m66592_enable(struct usb_ep *_ep,
1300 const struct usb_endpoint_descriptor *desc)
1301 {
1302 struct m66592_ep *ep;
1303
1304 ep = container_of(_ep, struct m66592_ep, ep);
1305 return alloc_pipe_config(ep, desc);
1306 }
1307
1308 static int m66592_disable(struct usb_ep *_ep)
1309 {
1310 struct m66592_ep *ep;
1311 struct m66592_request *req;
1312 unsigned long flags;
1313
1314 ep = container_of(_ep, struct m66592_ep, ep);
1315 BUG_ON(!ep);
1316
1317 while (!list_empty(&ep->queue)) {
1318 req = list_entry(ep->queue.next, struct m66592_request, queue);
1319 spin_lock_irqsave(&ep->m66592->lock, flags);
1320 transfer_complete(ep, req, -ECONNRESET);
1321 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1322 }
1323
1324 pipe_irq_disable(ep->m66592, ep->pipenum);
1325 return free_pipe_config(ep);
1326 }
1327
1328 static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
1329 gfp_t gfp_flags)
1330 {
1331 struct m66592_request *req;
1332
1333 req = kzalloc(sizeof(struct m66592_request), gfp_flags);
1334 if (!req)
1335 return NULL;
1336
1337 INIT_LIST_HEAD(&req->queue);
1338
1339 return &req->req;
1340 }
1341
1342 static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
1343 {
1344 struct m66592_request *req;
1345
1346 req = container_of(_req, struct m66592_request, req);
1347 kfree(req);
1348 }
1349
1350 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
1351 gfp_t gfp_flags)
1352 {
1353 struct m66592_ep *ep;
1354 struct m66592_request *req;
1355 unsigned long flags;
1356 int request = 0;
1357
1358 ep = container_of(_ep, struct m66592_ep, ep);
1359 req = container_of(_req, struct m66592_request, req);
1360
1361 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
1362 return -ESHUTDOWN;
1363
1364 spin_lock_irqsave(&ep->m66592->lock, flags);
1365
1366 if (list_empty(&ep->queue))
1367 request = 1;
1368
1369 list_add_tail(&req->queue, &ep->queue);
1370 req->req.actual = 0;
1371 req->req.status = -EINPROGRESS;
1372
1373 if (ep->ep.desc == NULL) /* control */
1374 start_ep0(ep, req);
1375 else {
1376 if (request && !ep->busy)
1377 start_packet(ep, req);
1378 }
1379
1380 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1381
1382 return 0;
1383 }
1384
1385 static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1386 {
1387 struct m66592_ep *ep;
1388 struct m66592_request *req;
1389 unsigned long flags;
1390
1391 ep = container_of(_ep, struct m66592_ep, ep);
1392 req = container_of(_req, struct m66592_request, req);
1393
1394 spin_lock_irqsave(&ep->m66592->lock, flags);
1395 if (!list_empty(&ep->queue))
1396 transfer_complete(ep, req, -ECONNRESET);
1397 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1398
1399 return 0;
1400 }
1401
1402 static int m66592_set_halt(struct usb_ep *_ep, int value)
1403 {
1404 struct m66592_ep *ep = container_of(_ep, struct m66592_ep, ep);
1405 unsigned long flags;
1406 int ret = 0;
1407
1408 spin_lock_irqsave(&ep->m66592->lock, flags);
1409 if (!list_empty(&ep->queue)) {
1410 ret = -EAGAIN;
1411 } else if (value) {
1412 ep->busy = 1;
1413 pipe_stall(ep->m66592, ep->pipenum);
1414 } else {
1415 ep->busy = 0;
1416 pipe_stop(ep->m66592, ep->pipenum);
1417 }
1418 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1419 return ret;
1420 }
1421
1422 static void m66592_fifo_flush(struct usb_ep *_ep)
1423 {
1424 struct m66592_ep *ep;
1425 unsigned long flags;
1426
1427 ep = container_of(_ep, struct m66592_ep, ep);
1428 spin_lock_irqsave(&ep->m66592->lock, flags);
1429 if (list_empty(&ep->queue) && !ep->busy) {
1430 pipe_stop(ep->m66592, ep->pipenum);
1431 m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
1432 }
1433 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1434 }
1435
1436 static const struct usb_ep_ops m66592_ep_ops = {
1437 .enable = m66592_enable,
1438 .disable = m66592_disable,
1439
1440 .alloc_request = m66592_alloc_request,
1441 .free_request = m66592_free_request,
1442
1443 .queue = m66592_queue,
1444 .dequeue = m66592_dequeue,
1445
1446 .set_halt = m66592_set_halt,
1447 .fifo_flush = m66592_fifo_flush,
1448 };
1449
1450 /*-------------------------------------------------------------------------*/
1451 static int m66592_udc_start(struct usb_gadget *g,
1452 struct usb_gadget_driver *driver)
1453 {
1454 struct m66592 *m66592 = to_m66592(g);
1455
1456 /* hook up the driver */
1457 driver->driver.bus = NULL;
1458 m66592->driver = driver;
1459
1460 m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1461 if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
1462 m66592_start_xclock(m66592);
1463 /* start vbus sampling */
1464 m66592->old_vbus = m66592_read(m66592,
1465 M66592_INTSTS0) & M66592_VBSTS;
1466 m66592->scount = M66592_MAX_SAMPLING;
1467 mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
1468 }
1469
1470 return 0;
1471 }
1472
1473 static int m66592_udc_stop(struct usb_gadget *g)
1474 {
1475 struct m66592 *m66592 = to_m66592(g);
1476
1477 m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1478
1479 init_controller(m66592);
1480 disable_controller(m66592);
1481
1482 m66592->driver = NULL;
1483
1484 return 0;
1485 }
1486
1487 /*-------------------------------------------------------------------------*/
1488 static int m66592_get_frame(struct usb_gadget *_gadget)
1489 {
1490 struct m66592 *m66592 = gadget_to_m66592(_gadget);
1491 return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
1492 }
1493
1494 static int m66592_pullup(struct usb_gadget *gadget, int is_on)
1495 {
1496 struct m66592 *m66592 = gadget_to_m66592(gadget);
1497 unsigned long flags;
1498
1499 spin_lock_irqsave(&m66592->lock, flags);
1500 if (is_on)
1501 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
1502 else
1503 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
1504 spin_unlock_irqrestore(&m66592->lock, flags);
1505
1506 return 0;
1507 }
1508
1509 static const struct usb_gadget_ops m66592_gadget_ops = {
1510 .get_frame = m66592_get_frame,
1511 .udc_start = m66592_udc_start,
1512 .udc_stop = m66592_udc_stop,
1513 .pullup = m66592_pullup,
1514 };
1515
1516 static int m66592_remove(struct platform_device *pdev)
1517 {
1518 struct m66592 *m66592 = platform_get_drvdata(pdev);
1519
1520 usb_del_gadget_udc(&m66592->gadget);
1521
1522 del_timer_sync(&m66592->timer);
1523 iounmap(m66592->reg);
1524 free_irq(platform_get_irq(pdev, 0), m66592);
1525 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1526 if (m66592->pdata->on_chip) {
1527 clk_disable(m66592->clk);
1528 clk_put(m66592->clk);
1529 }
1530 kfree(m66592);
1531 return 0;
1532 }
1533
1534 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1535 {
1536 }
1537
1538 static int m66592_probe(struct platform_device *pdev)
1539 {
1540 struct resource *res, *ires;
1541 void __iomem *reg = NULL;
1542 struct m66592 *m66592 = NULL;
1543 char clk_name[8];
1544 int ret = 0;
1545 int i;
1546
1547 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1548 if (!res) {
1549 ret = -ENODEV;
1550 pr_err("platform_get_resource error.\n");
1551 goto clean_up;
1552 }
1553
1554 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1555 if (!ires) {
1556 ret = -ENODEV;
1557 dev_err(&pdev->dev,
1558 "platform_get_resource IORESOURCE_IRQ error.\n");
1559 goto clean_up;
1560 }
1561
1562 reg = ioremap(res->start, resource_size(res));
1563 if (reg == NULL) {
1564 ret = -ENOMEM;
1565 pr_err("ioremap error.\n");
1566 goto clean_up;
1567 }
1568
1569 if (dev_get_platdata(&pdev->dev) == NULL) {
1570 dev_err(&pdev->dev, "no platform data\n");
1571 ret = -ENODEV;
1572 goto clean_up;
1573 }
1574
1575 /* initialize ucd */
1576 m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
1577 if (m66592 == NULL) {
1578 ret = -ENOMEM;
1579 goto clean_up;
1580 }
1581
1582 m66592->pdata = dev_get_platdata(&pdev->dev);
1583 m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1584
1585 spin_lock_init(&m66592->lock);
1586 platform_set_drvdata(pdev, m66592);
1587
1588 m66592->gadget.ops = &m66592_gadget_ops;
1589 m66592->gadget.max_speed = USB_SPEED_HIGH;
1590 m66592->gadget.name = udc_name;
1591
1592 setup_timer(&m66592->timer, m66592_timer, (unsigned long)m66592);
1593 m66592->reg = reg;
1594
1595 ret = request_irq(ires->start, m66592_irq, IRQF_SHARED,
1596 udc_name, m66592);
1597 if (ret < 0) {
1598 pr_err("request_irq error (%d)\n", ret);
1599 goto clean_up;
1600 }
1601
1602 if (m66592->pdata->on_chip) {
1603 snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
1604 m66592->clk = clk_get(&pdev->dev, clk_name);
1605 if (IS_ERR(m66592->clk)) {
1606 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1607 clk_name);
1608 ret = PTR_ERR(m66592->clk);
1609 goto clean_up2;
1610 }
1611 clk_enable(m66592->clk);
1612 }
1613
1614 INIT_LIST_HEAD(&m66592->gadget.ep_list);
1615 m66592->gadget.ep0 = &m66592->ep[0].ep;
1616 INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
1617 for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
1618 struct m66592_ep *ep = &m66592->ep[i];
1619
1620 if (i != 0) {
1621 INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
1622 list_add_tail(&m66592->ep[i].ep.ep_list,
1623 &m66592->gadget.ep_list);
1624 }
1625 ep->m66592 = m66592;
1626 INIT_LIST_HEAD(&ep->queue);
1627 ep->ep.name = m66592_ep_name[i];
1628 ep->ep.ops = &m66592_ep_ops;
1629 usb_ep_set_maxpacket_limit(&ep->ep, 512);
1630
1631 if (i == 0) {
1632 ep->ep.caps.type_control = true;
1633 } else {
1634 ep->ep.caps.type_iso = true;
1635 ep->ep.caps.type_bulk = true;
1636 ep->ep.caps.type_int = true;
1637 }
1638
1639 ep->ep.caps.dir_in = true;
1640 ep->ep.caps.dir_out = true;
1641 }
1642 usb_ep_set_maxpacket_limit(&m66592->ep[0].ep, 64);
1643 m66592->ep[0].pipenum = 0;
1644 m66592->ep[0].fifoaddr = M66592_CFIFO;
1645 m66592->ep[0].fifosel = M66592_CFIFOSEL;
1646 m66592->ep[0].fifoctr = M66592_CFIFOCTR;
1647 m66592->ep[0].fifotrn = 0;
1648 m66592->ep[0].pipectr = get_pipectr_addr(0);
1649 m66592->pipenum2ep[0] = &m66592->ep[0];
1650 m66592->epaddr2ep[0] = &m66592->ep[0];
1651
1652 m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
1653 if (m66592->ep0_req == NULL) {
1654 ret = -ENOMEM;
1655 goto clean_up3;
1656 }
1657 m66592->ep0_req->complete = nop_completion;
1658
1659 init_controller(m66592);
1660
1661 ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
1662 if (ret)
1663 goto err_add_udc;
1664
1665 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1666 return 0;
1667
1668 err_add_udc:
1669 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1670
1671 clean_up3:
1672 if (m66592->pdata->on_chip) {
1673 clk_disable(m66592->clk);
1674 clk_put(m66592->clk);
1675 }
1676 clean_up2:
1677 free_irq(ires->start, m66592);
1678 clean_up:
1679 if (m66592) {
1680 if (m66592->ep0_req)
1681 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1682 kfree(m66592);
1683 }
1684 if (reg)
1685 iounmap(reg);
1686
1687 return ret;
1688 }
1689
1690 /*-------------------------------------------------------------------------*/
1691 static struct platform_driver m66592_driver = {
1692 .remove = m66592_remove,
1693 .driver = {
1694 .name = (char *) udc_name,
1695 },
1696 };
1697
1698 module_platform_driver_probe(m66592_driver, m66592_probe);
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