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1/*
2 * M66592 UDC (USB gadget)
3 *
4 * Copyright (C) 2006-2007 Renesas Solutions Corp.
5 *
6 * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 */
12
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/delay.h>
16#include <linux/io.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19#include <linux/err.h>
20#include <linux/usb/ch9.h>
21#include <linux/usb/gadget.h>
22
23#include "m66592-udc.h"
24
25MODULE_DESCRIPTION("M66592 USB gadget driver");
26MODULE_LICENSE("GPL");
27MODULE_AUTHOR("Yoshihiro Shimoda");
28MODULE_ALIAS("platform:m66592_udc");
29
30#define DRIVER_VERSION "21 July 2009"
31
32static const char udc_name[] = "m66592_udc";
33static const char *m66592_ep_name[] = {
34 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
35};
36
37static void disable_controller(struct m66592 *m66592);
38static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
39static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
40static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
41 gfp_t gfp_flags);
42
43static void transfer_complete(struct m66592_ep *ep,
44 struct m66592_request *req, int status);
45
46/*-------------------------------------------------------------------------*/
47static inline u16 get_usb_speed(struct m66592 *m66592)
48{
49 return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
50}
51
52static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
53 unsigned long reg)
54{
55 u16 tmp;
56
57 tmp = m66592_read(m66592, M66592_INTENB0);
58 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
59 M66592_INTENB0);
60 m66592_bset(m66592, (1 << pipenum), reg);
61 m66592_write(m66592, tmp, M66592_INTENB0);
62}
63
64static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
65 unsigned long reg)
66{
67 u16 tmp;
68
69 tmp = m66592_read(m66592, M66592_INTENB0);
70 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
71 M66592_INTENB0);
72 m66592_bclr(m66592, (1 << pipenum), reg);
73 m66592_write(m66592, tmp, M66592_INTENB0);
74}
75
76static void m66592_usb_connect(struct m66592 *m66592)
77{
78 m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
79 m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
80 M66592_INTENB0);
81 m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
82
83 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
84}
85
86static void m66592_usb_disconnect(struct m66592 *m66592)
87__releases(m66592->lock)
88__acquires(m66592->lock)
89{
90 m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
91 m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
92 M66592_INTENB0);
93 m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
94 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
95
96 m66592->gadget.speed = USB_SPEED_UNKNOWN;
97 spin_unlock(&m66592->lock);
98 m66592->driver->disconnect(&m66592->gadget);
99 spin_lock(&m66592->lock);
100
101 disable_controller(m66592);
102 INIT_LIST_HEAD(&m66592->ep[0].queue);
103}
104
105static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
106{
107 u16 pid = 0;
108 unsigned long offset;
109
110 if (pipenum == 0)
111 pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
112 else if (pipenum < M66592_MAX_NUM_PIPE) {
113 offset = get_pipectr_addr(pipenum);
114 pid = m66592_read(m66592, offset) & M66592_PID;
115 } else
116 pr_err("unexpect pipe num (%d)\n", pipenum);
117
118 return pid;
119}
120
121static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
122 u16 pid)
123{
124 unsigned long offset;
125
126 if (pipenum == 0)
127 m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
128 else if (pipenum < M66592_MAX_NUM_PIPE) {
129 offset = get_pipectr_addr(pipenum);
130 m66592_mdfy(m66592, pid, M66592_PID, offset);
131 } else
132 pr_err("unexpect pipe num (%d)\n", pipenum);
133}
134
135static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
136{
137 control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
138}
139
140static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
141{
142 control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
143}
144
145static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
146{
147 control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
148}
149
150static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
151{
152 u16 ret = 0;
153 unsigned long offset;
154
155 if (pipenum == 0)
156 ret = m66592_read(m66592, M66592_DCPCTR);
157 else if (pipenum < M66592_MAX_NUM_PIPE) {
158 offset = get_pipectr_addr(pipenum);
159 ret = m66592_read(m66592, offset);
160 } else
161 pr_err("unexpect pipe num (%d)\n", pipenum);
162
163 return ret;
164}
165
166static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
167{
168 unsigned long offset;
169
170 pipe_stop(m66592, pipenum);
171
172 if (pipenum == 0)
173 m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
174 else if (pipenum < M66592_MAX_NUM_PIPE) {
175 offset = get_pipectr_addr(pipenum);
176 m66592_bset(m66592, M66592_SQCLR, offset);
177 } else
178 pr_err("unexpect pipe num(%d)\n", pipenum);
179}
180
181static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
182{
183 u16 tmp;
184 int size;
185
186 if (pipenum == 0) {
187 tmp = m66592_read(m66592, M66592_DCPCFG);
188 if ((tmp & M66592_CNTMD) != 0)
189 size = 256;
190 else {
191 tmp = m66592_read(m66592, M66592_DCPMAXP);
192 size = tmp & M66592_MAXP;
193 }
194 } else {
195 m66592_write(m66592, pipenum, M66592_PIPESEL);
196 tmp = m66592_read(m66592, M66592_PIPECFG);
197 if ((tmp & M66592_CNTMD) != 0) {
198 tmp = m66592_read(m66592, M66592_PIPEBUF);
199 size = ((tmp >> 10) + 1) * 64;
200 } else {
201 tmp = m66592_read(m66592, M66592_PIPEMAXP);
202 size = tmp & M66592_MXPS;
203 }
204 }
205
206 return size;
207}
208
209static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
210{
211 struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
212 unsigned short mbw;
213
214 if (ep->use_dma)
215 return;
216
217 m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);
218
219 ndelay(450);
220
221 if (m66592->pdata->on_chip)
222 mbw = M66592_MBW_32;
223 else
224 mbw = M66592_MBW_16;
225
226 m66592_bset(m66592, mbw, ep->fifosel);
227}
228
229static int pipe_buffer_setting(struct m66592 *m66592,
230 struct m66592_pipe_info *info)
231{
232 u16 bufnum = 0, buf_bsize = 0;
233 u16 pipecfg = 0;
234
235 if (info->pipe == 0)
236 return -EINVAL;
237
238 m66592_write(m66592, info->pipe, M66592_PIPESEL);
239
240 if (info->dir_in)
241 pipecfg |= M66592_DIR;
242 pipecfg |= info->type;
243 pipecfg |= info->epnum;
244 switch (info->type) {
245 case M66592_INT:
246 bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
247 buf_bsize = 0;
248 break;
249 case M66592_BULK:
250 /* isochronous pipes may be used as bulk pipes */
251 if (info->pipe >= M66592_BASE_PIPENUM_BULK)
252 bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
253 else
254 bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;
255
256 bufnum = M66592_BASE_BUFNUM + (bufnum * 16);
257 buf_bsize = 7;
258 pipecfg |= M66592_DBLB;
259 if (!info->dir_in)
260 pipecfg |= M66592_SHTNAK;
261 break;
262 case M66592_ISO:
263 bufnum = M66592_BASE_BUFNUM +
264 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
265 buf_bsize = 7;
266 break;
267 }
268
269 if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) {
270 pr_err("m66592 pipe memory is insufficient\n");
271 return -ENOMEM;
272 }
273
274 m66592_write(m66592, pipecfg, M66592_PIPECFG);
275 m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
276 m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
277 if (info->interval)
278 info->interval--;
279 m66592_write(m66592, info->interval, M66592_PIPEPERI);
280
281 return 0;
282}
283
284static void pipe_buffer_release(struct m66592 *m66592,
285 struct m66592_pipe_info *info)
286{
287 if (info->pipe == 0)
288 return;
289
290 if (is_bulk_pipe(info->pipe)) {
291 m66592->bulk--;
292 } else if (is_interrupt_pipe(info->pipe))
293 m66592->interrupt--;
294 else if (is_isoc_pipe(info->pipe)) {
295 m66592->isochronous--;
296 if (info->type == M66592_BULK)
297 m66592->bulk--;
298 } else
299 pr_err("ep_release: unexpect pipenum (%d)\n",
300 info->pipe);
301}
302
303static void pipe_initialize(struct m66592_ep *ep)
304{
305 struct m66592 *m66592 = ep->m66592;
306 unsigned short mbw;
307
308 m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
309
310 m66592_write(m66592, M66592_ACLRM, ep->pipectr);
311 m66592_write(m66592, 0, ep->pipectr);
312 m66592_write(m66592, M66592_SQCLR, ep->pipectr);
313 if (ep->use_dma) {
314 m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);
315
316 ndelay(450);
317
318 if (m66592->pdata->on_chip)
319 mbw = M66592_MBW_32;
320 else
321 mbw = M66592_MBW_16;
322
323 m66592_bset(m66592, mbw, ep->fifosel);
324 }
325}
326
327static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
328 const struct usb_endpoint_descriptor *desc,
329 u16 pipenum, int dma)
330{
331 if ((pipenum != 0) && dma) {
332 if (m66592->num_dma == 0) {
333 m66592->num_dma++;
334 ep->use_dma = 1;
335 ep->fifoaddr = M66592_D0FIFO;
336 ep->fifosel = M66592_D0FIFOSEL;
337 ep->fifoctr = M66592_D0FIFOCTR;
338 ep->fifotrn = M66592_D0FIFOTRN;
339 } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
340 m66592->num_dma++;
341 ep->use_dma = 1;
342 ep->fifoaddr = M66592_D1FIFO;
343 ep->fifosel = M66592_D1FIFOSEL;
344 ep->fifoctr = M66592_D1FIFOCTR;
345 ep->fifotrn = M66592_D1FIFOTRN;
346 } else {
347 ep->use_dma = 0;
348 ep->fifoaddr = M66592_CFIFO;
349 ep->fifosel = M66592_CFIFOSEL;
350 ep->fifoctr = M66592_CFIFOCTR;
351 ep->fifotrn = 0;
352 }
353 } else {
354 ep->use_dma = 0;
355 ep->fifoaddr = M66592_CFIFO;
356 ep->fifosel = M66592_CFIFOSEL;
357 ep->fifoctr = M66592_CFIFOCTR;
358 ep->fifotrn = 0;
359 }
360
361 ep->pipectr = get_pipectr_addr(pipenum);
362 ep->pipenum = pipenum;
363 ep->ep.maxpacket = usb_endpoint_maxp(desc);
364 m66592->pipenum2ep[pipenum] = ep;
365 m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
366 INIT_LIST_HEAD(&ep->queue);
367}
368
369static void m66592_ep_release(struct m66592_ep *ep)
370{
371 struct m66592 *m66592 = ep->m66592;
372 u16 pipenum = ep->pipenum;
373
374 if (pipenum == 0)
375 return;
376
377 if (ep->use_dma)
378 m66592->num_dma--;
379 ep->pipenum = 0;
380 ep->busy = 0;
381 ep->use_dma = 0;
382}
383
384static int alloc_pipe_config(struct m66592_ep *ep,
385 const struct usb_endpoint_descriptor *desc)
386{
387 struct m66592 *m66592 = ep->m66592;
388 struct m66592_pipe_info info;
389 int dma = 0;
390 int *counter;
391 int ret;
392
393 ep->ep.desc = desc;
394
395 BUG_ON(ep->pipenum);
396
397 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
398 case USB_ENDPOINT_XFER_BULK:
399 if (m66592->bulk >= M66592_MAX_NUM_BULK) {
400 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
401 pr_err("bulk pipe is insufficient\n");
402 return -ENODEV;
403 } else {
404 info.pipe = M66592_BASE_PIPENUM_ISOC
405 + m66592->isochronous;
406 counter = &m66592->isochronous;
407 }
408 } else {
409 info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
410 counter = &m66592->bulk;
411 }
412 info.type = M66592_BULK;
413 dma = 1;
414 break;
415 case USB_ENDPOINT_XFER_INT:
416 if (m66592->interrupt >= M66592_MAX_NUM_INT) {
417 pr_err("interrupt pipe is insufficient\n");
418 return -ENODEV;
419 }
420 info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
421 info.type = M66592_INT;
422 counter = &m66592->interrupt;
423 break;
424 case USB_ENDPOINT_XFER_ISOC:
425 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
426 pr_err("isochronous pipe is insufficient\n");
427 return -ENODEV;
428 }
429 info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
430 info.type = M66592_ISO;
431 counter = &m66592->isochronous;
432 break;
433 default:
434 pr_err("unexpect xfer type\n");
435 return -EINVAL;
436 }
437 ep->type = info.type;
438
439 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
440 info.maxpacket = usb_endpoint_maxp(desc);
441 info.interval = desc->bInterval;
442 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
443 info.dir_in = 1;
444 else
445 info.dir_in = 0;
446
447 ret = pipe_buffer_setting(m66592, &info);
448 if (ret < 0) {
449 pr_err("pipe_buffer_setting fail\n");
450 return ret;
451 }
452
453 (*counter)++;
454 if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
455 m66592->bulk++;
456
457 m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
458 pipe_initialize(ep);
459
460 return 0;
461}
462
463static int free_pipe_config(struct m66592_ep *ep)
464{
465 struct m66592 *m66592 = ep->m66592;
466 struct m66592_pipe_info info;
467
468 info.pipe = ep->pipenum;
469 info.type = ep->type;
470 pipe_buffer_release(m66592, &info);
471 m66592_ep_release(ep);
472
473 return 0;
474}
475
476/*-------------------------------------------------------------------------*/
477static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
478{
479 enable_irq_ready(m66592, pipenum);
480 enable_irq_nrdy(m66592, pipenum);
481}
482
483static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
484{
485 disable_irq_ready(m66592, pipenum);
486 disable_irq_nrdy(m66592, pipenum);
487}
488
489/* if complete is true, gadget driver complete function is not call */
490static void control_end(struct m66592 *m66592, unsigned ccpl)
491{
492 m66592->ep[0].internal_ccpl = ccpl;
493 pipe_start(m66592, 0);
494 m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
495}
496
497static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
498{
499 struct m66592 *m66592 = ep->m66592;
500
501 pipe_change(m66592, ep->pipenum);
502 m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
503 (M66592_ISEL | M66592_CURPIPE),
504 M66592_CFIFOSEL);
505 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
506 if (req->req.length == 0) {
507 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
508 pipe_start(m66592, 0);
509 transfer_complete(ep, req, 0);
510 } else {
511 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
512 irq_ep0_write(ep, req);
513 }
514}
515
516static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
517{
518 struct m66592 *m66592 = ep->m66592;
519 u16 tmp;
520
521 pipe_change(m66592, ep->pipenum);
522 disable_irq_empty(m66592, ep->pipenum);
523 pipe_start(m66592, ep->pipenum);
524
525 tmp = m66592_read(m66592, ep->fifoctr);
526 if (unlikely((tmp & M66592_FRDY) == 0))
527 pipe_irq_enable(m66592, ep->pipenum);
528 else
529 irq_packet_write(ep, req);
530}
531
532static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
533{
534 struct m66592 *m66592 = ep->m66592;
535 u16 pipenum = ep->pipenum;
536
537 if (ep->pipenum == 0) {
538 m66592_mdfy(m66592, M66592_PIPE0,
539 (M66592_ISEL | M66592_CURPIPE),
540 M66592_CFIFOSEL);
541 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
542 pipe_start(m66592, pipenum);
543 pipe_irq_enable(m66592, pipenum);
544 } else {
545 if (ep->use_dma) {
546 m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
547 pipe_change(m66592, pipenum);
548 m66592_bset(m66592, M66592_TRENB, ep->fifosel);
549 m66592_write(m66592,
550 (req->req.length + ep->ep.maxpacket - 1)
551 / ep->ep.maxpacket,
552 ep->fifotrn);
553 }
554 pipe_start(m66592, pipenum); /* trigger once */
555 pipe_irq_enable(m66592, pipenum);
556 }
557}
558
559static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
560{
561 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
562 start_packet_write(ep, req);
563 else
564 start_packet_read(ep, req);
565}
566
567static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
568{
569 u16 ctsq;
570
571 ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;
572
573 switch (ctsq) {
574 case M66592_CS_RDDS:
575 start_ep0_write(ep, req);
576 break;
577 case M66592_CS_WRDS:
578 start_packet_read(ep, req);
579 break;
580
581 case M66592_CS_WRND:
582 control_end(ep->m66592, 0);
583 break;
584 default:
585 pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
586 break;
587 }
588}
589
590static void init_controller(struct m66592 *m66592)
591{
592 unsigned int endian;
593
594 if (m66592->pdata->on_chip) {
595 if (m66592->pdata->endian)
596 endian = 0; /* big endian */
597 else
598 endian = M66592_LITTLE; /* little endian */
599
600 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
601 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
602 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
603 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
604
605 /* This is a workaound for SH7722 2nd cut */
606 m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
607 m66592_bset(m66592, 0x1000, M66592_TESTMODE);
608 m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
609
610 m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
611
612 m66592_write(m66592, 0, M66592_CFBCFG);
613 m66592_write(m66592, 0, M66592_D0FBCFG);
614 m66592_bset(m66592, endian, M66592_CFBCFG);
615 m66592_bset(m66592, endian, M66592_D0FBCFG);
616 } else {
617 unsigned int clock, vif, irq_sense;
618
619 if (m66592->pdata->endian)
620 endian = M66592_BIGEND; /* big endian */
621 else
622 endian = 0; /* little endian */
623
624 if (m66592->pdata->vif)
625 vif = M66592_LDRV; /* 3.3v */
626 else
627 vif = 0; /* 1.5v */
628
629 switch (m66592->pdata->xtal) {
630 case M66592_PLATDATA_XTAL_12MHZ:
631 clock = M66592_XTAL12;
632 break;
633 case M66592_PLATDATA_XTAL_24MHZ:
634 clock = M66592_XTAL24;
635 break;
636 case M66592_PLATDATA_XTAL_48MHZ:
637 clock = M66592_XTAL48;
638 break;
639 default:
640 pr_warning("m66592-udc: xtal configuration error\n");
641 clock = 0;
642 }
643
644 switch (m66592->irq_trigger) {
645 case IRQF_TRIGGER_LOW:
646 irq_sense = M66592_INTL;
647 break;
648 case IRQF_TRIGGER_FALLING:
649 irq_sense = 0;
650 break;
651 default:
652 pr_warning("m66592-udc: irq trigger config error\n");
653 irq_sense = 0;
654 }
655
656 m66592_bset(m66592,
657 (vif & M66592_LDRV) | (endian & M66592_BIGEND),
658 M66592_PINCFG);
659 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
660 m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
661 M66592_SYSCFG);
662 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
663 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
664 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
665
666 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
667
668 msleep(3);
669
670 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
671
672 msleep(1);
673
674 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
675
676 m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
677 m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
678 M66592_DMA0CFG);
679 }
680}
681
682static void disable_controller(struct m66592 *m66592)
683{
684 m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE);
685 if (!m66592->pdata->on_chip) {
686 m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
687 udelay(1);
688 m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
689 udelay(1);
690 m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
691 udelay(1);
692 m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
693 }
694}
695
696static void m66592_start_xclock(struct m66592 *m66592)
697{
698 u16 tmp;
699
700 if (!m66592->pdata->on_chip) {
701 tmp = m66592_read(m66592, M66592_SYSCFG);
702 if (!(tmp & M66592_XCKE))
703 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
704 }
705}
706
707/*-------------------------------------------------------------------------*/
708static void transfer_complete(struct m66592_ep *ep,
709 struct m66592_request *req, int status)
710__releases(m66592->lock)
711__acquires(m66592->lock)
712{
713 int restart = 0;
714
715 if (unlikely(ep->pipenum == 0)) {
716 if (ep->internal_ccpl) {
717 ep->internal_ccpl = 0;
718 return;
719 }
720 }
721
722 list_del_init(&req->queue);
723 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
724 req->req.status = -ESHUTDOWN;
725 else
726 req->req.status = status;
727
728 if (!list_empty(&ep->queue))
729 restart = 1;
730
731 spin_unlock(&ep->m66592->lock);
732 req->req.complete(&ep->ep, &req->req);
733 spin_lock(&ep->m66592->lock);
734
735 if (restart) {
736 req = list_entry(ep->queue.next, struct m66592_request, queue);
737 if (ep->ep.desc)
738 start_packet(ep, req);
739 }
740}
741
742static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
743{
744 int i;
745 u16 tmp;
746 unsigned bufsize;
747 size_t size;
748 void *buf;
749 u16 pipenum = ep->pipenum;
750 struct m66592 *m66592 = ep->m66592;
751
752 pipe_change(m66592, pipenum);
753 m66592_bset(m66592, M66592_ISEL, ep->fifosel);
754
755 i = 0;
756 do {
757 tmp = m66592_read(m66592, ep->fifoctr);
758 if (i++ > 100000) {
759 pr_err("pipe0 is busy. maybe cpu i/o bus "
760 "conflict. please power off this controller.");
761 return;
762 }
763 ndelay(1);
764 } while ((tmp & M66592_FRDY) == 0);
765
766 /* prepare parameters */
767 bufsize = get_buffer_size(m66592, pipenum);
768 buf = req->req.buf + req->req.actual;
769 size = min(bufsize, req->req.length - req->req.actual);
770
771 /* write fifo */
772 if (req->req.buf) {
773 if (size > 0)
774 m66592_write_fifo(m66592, ep, buf, size);
775 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
776 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
777 }
778
779 /* update parameters */
780 req->req.actual += size;
781
782 /* check transfer finish */
783 if ((!req->req.zero && (req->req.actual == req->req.length))
784 || (size % ep->ep.maxpacket)
785 || (size == 0)) {
786 disable_irq_ready(m66592, pipenum);
787 disable_irq_empty(m66592, pipenum);
788 } else {
789 disable_irq_ready(m66592, pipenum);
790 enable_irq_empty(m66592, pipenum);
791 }
792 pipe_start(m66592, pipenum);
793}
794
795static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
796{
797 u16 tmp;
798 unsigned bufsize;
799 size_t size;
800 void *buf;
801 u16 pipenum = ep->pipenum;
802 struct m66592 *m66592 = ep->m66592;
803
804 pipe_change(m66592, pipenum);
805 tmp = m66592_read(m66592, ep->fifoctr);
806 if (unlikely((tmp & M66592_FRDY) == 0)) {
807 pipe_stop(m66592, pipenum);
808 pipe_irq_disable(m66592, pipenum);
809 pr_err("write fifo not ready. pipnum=%d\n", pipenum);
810 return;
811 }
812
813 /* prepare parameters */
814 bufsize = get_buffer_size(m66592, pipenum);
815 buf = req->req.buf + req->req.actual;
816 size = min(bufsize, req->req.length - req->req.actual);
817
818 /* write fifo */
819 if (req->req.buf) {
820 m66592_write_fifo(m66592, ep, buf, size);
821 if ((size == 0)
822 || ((size % ep->ep.maxpacket) != 0)
823 || ((bufsize != ep->ep.maxpacket)
824 && (bufsize > size)))
825 m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
826 }
827
828 /* update parameters */
829 req->req.actual += size;
830 /* check transfer finish */
831 if ((!req->req.zero && (req->req.actual == req->req.length))
832 || (size % ep->ep.maxpacket)
833 || (size == 0)) {
834 disable_irq_ready(m66592, pipenum);
835 enable_irq_empty(m66592, pipenum);
836 } else {
837 disable_irq_empty(m66592, pipenum);
838 pipe_irq_enable(m66592, pipenum);
839 }
840}
841
842static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
843{
844 u16 tmp;
845 int rcv_len, bufsize, req_len;
846 int size;
847 void *buf;
848 u16 pipenum = ep->pipenum;
849 struct m66592 *m66592 = ep->m66592;
850 int finish = 0;
851
852 pipe_change(m66592, pipenum);
853 tmp = m66592_read(m66592, ep->fifoctr);
854 if (unlikely((tmp & M66592_FRDY) == 0)) {
855 req->req.status = -EPIPE;
856 pipe_stop(m66592, pipenum);
857 pipe_irq_disable(m66592, pipenum);
858 pr_err("read fifo not ready");
859 return;
860 }
861
862 /* prepare parameters */
863 rcv_len = tmp & M66592_DTLN;
864 bufsize = get_buffer_size(m66592, pipenum);
865
866 buf = req->req.buf + req->req.actual;
867 req_len = req->req.length - req->req.actual;
868 if (rcv_len < bufsize)
869 size = min(rcv_len, req_len);
870 else
871 size = min(bufsize, req_len);
872
873 /* update parameters */
874 req->req.actual += size;
875
876 /* check transfer finish */
877 if ((!req->req.zero && (req->req.actual == req->req.length))
878 || (size % ep->ep.maxpacket)
879 || (size == 0)) {
880 pipe_stop(m66592, pipenum);
881 pipe_irq_disable(m66592, pipenum);
882 finish = 1;
883 }
884
885 /* read fifo */
886 if (req->req.buf) {
887 if (size == 0)
888 m66592_write(m66592, M66592_BCLR, ep->fifoctr);
889 else
890 m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
891 }
892
893 if ((ep->pipenum != 0) && finish)
894 transfer_complete(ep, req, 0);
895}
896
897static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
898{
899 u16 check;
900 u16 pipenum;
901 struct m66592_ep *ep;
902 struct m66592_request *req;
903
904 if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
905 m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
906 m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
907 M66592_CFIFOSEL);
908
909 ep = &m66592->ep[0];
910 req = list_entry(ep->queue.next, struct m66592_request, queue);
911 irq_packet_read(ep, req);
912 } else {
913 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
914 check = 1 << pipenum;
915 if ((status & check) && (enb & check)) {
916 m66592_write(m66592, ~check, M66592_BRDYSTS);
917 ep = m66592->pipenum2ep[pipenum];
918 req = list_entry(ep->queue.next,
919 struct m66592_request, queue);
920 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
921 irq_packet_write(ep, req);
922 else
923 irq_packet_read(ep, req);
924 }
925 }
926 }
927}
928
929static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
930{
931 u16 tmp;
932 u16 check;
933 u16 pipenum;
934 struct m66592_ep *ep;
935 struct m66592_request *req;
936
937 if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
938 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
939
940 ep = &m66592->ep[0];
941 req = list_entry(ep->queue.next, struct m66592_request, queue);
942 irq_ep0_write(ep, req);
943 } else {
944 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
945 check = 1 << pipenum;
946 if ((status & check) && (enb & check)) {
947 m66592_write(m66592, ~check, M66592_BEMPSTS);
948 tmp = control_reg_get(m66592, pipenum);
949 if ((tmp & M66592_INBUFM) == 0) {
950 disable_irq_empty(m66592, pipenum);
951 pipe_irq_disable(m66592, pipenum);
952 pipe_stop(m66592, pipenum);
953 ep = m66592->pipenum2ep[pipenum];
954 req = list_entry(ep->queue.next,
955 struct m66592_request,
956 queue);
957 if (!list_empty(&ep->queue))
958 transfer_complete(ep, req, 0);
959 }
960 }
961 }
962 }
963}
964
965static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
966__releases(m66592->lock)
967__acquires(m66592->lock)
968{
969 struct m66592_ep *ep;
970 u16 pid;
971 u16 status = 0;
972 u16 w_index = le16_to_cpu(ctrl->wIndex);
973
974 switch (ctrl->bRequestType & USB_RECIP_MASK) {
975 case USB_RECIP_DEVICE:
976 status = 1 << USB_DEVICE_SELF_POWERED;
977 break;
978 case USB_RECIP_INTERFACE:
979 status = 0;
980 break;
981 case USB_RECIP_ENDPOINT:
982 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
983 pid = control_reg_get_pid(m66592, ep->pipenum);
984 if (pid == M66592_PID_STALL)
985 status = 1 << USB_ENDPOINT_HALT;
986 else
987 status = 0;
988 break;
989 default:
990 pipe_stall(m66592, 0);
991 return; /* exit */
992 }
993
994 m66592->ep0_data = cpu_to_le16(status);
995 m66592->ep0_req->buf = &m66592->ep0_data;
996 m66592->ep0_req->length = 2;
997 /* AV: what happens if we get called again before that gets through? */
998 spin_unlock(&m66592->lock);
999 m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
1000 spin_lock(&m66592->lock);
1001}
1002
1003static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1004{
1005 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1006 case USB_RECIP_DEVICE:
1007 control_end(m66592, 1);
1008 break;
1009 case USB_RECIP_INTERFACE:
1010 control_end(m66592, 1);
1011 break;
1012 case USB_RECIP_ENDPOINT: {
1013 struct m66592_ep *ep;
1014 struct m66592_request *req;
1015 u16 w_index = le16_to_cpu(ctrl->wIndex);
1016
1017 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1018 pipe_stop(m66592, ep->pipenum);
1019 control_reg_sqclr(m66592, ep->pipenum);
1020
1021 control_end(m66592, 1);
1022
1023 req = list_entry(ep->queue.next,
1024 struct m66592_request, queue);
1025 if (ep->busy) {
1026 ep->busy = 0;
1027 if (list_empty(&ep->queue))
1028 break;
1029 start_packet(ep, req);
1030 } else if (!list_empty(&ep->queue))
1031 pipe_start(m66592, ep->pipenum);
1032 }
1033 break;
1034 default:
1035 pipe_stall(m66592, 0);
1036 break;
1037 }
1038}
1039
1040static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1041{
1042 u16 tmp;
1043 int timeout = 3000;
1044
1045 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1046 case USB_RECIP_DEVICE:
1047 switch (le16_to_cpu(ctrl->wValue)) {
1048 case USB_DEVICE_TEST_MODE:
1049 control_end(m66592, 1);
1050 /* Wait for the completion of status stage */
1051 do {
1052 tmp = m66592_read(m66592, M66592_INTSTS0) &
1053 M66592_CTSQ;
1054 udelay(1);
1055 } while (tmp != M66592_CS_IDST || timeout-- > 0);
1056
1057 if (tmp == M66592_CS_IDST)
1058 m66592_bset(m66592,
1059 le16_to_cpu(ctrl->wIndex >> 8),
1060 M66592_TESTMODE);
1061 break;
1062 default:
1063 pipe_stall(m66592, 0);
1064 break;
1065 }
1066 break;
1067 case USB_RECIP_INTERFACE:
1068 control_end(m66592, 1);
1069 break;
1070 case USB_RECIP_ENDPOINT: {
1071 struct m66592_ep *ep;
1072 u16 w_index = le16_to_cpu(ctrl->wIndex);
1073
1074 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1075 pipe_stall(m66592, ep->pipenum);
1076
1077 control_end(m66592, 1);
1078 }
1079 break;
1080 default:
1081 pipe_stall(m66592, 0);
1082 break;
1083 }
1084}
1085
1086/* if return value is true, call class driver's setup() */
1087static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
1088{
1089 u16 *p = (u16 *)ctrl;
1090 unsigned long offset = M66592_USBREQ;
1091 int i, ret = 0;
1092
1093 /* read fifo */
1094 m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);
1095
1096 for (i = 0; i < 4; i++)
1097 p[i] = m66592_read(m66592, offset + i*2);
1098
1099 /* check request */
1100 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1101 switch (ctrl->bRequest) {
1102 case USB_REQ_GET_STATUS:
1103 get_status(m66592, ctrl);
1104 break;
1105 case USB_REQ_CLEAR_FEATURE:
1106 clear_feature(m66592, ctrl);
1107 break;
1108 case USB_REQ_SET_FEATURE:
1109 set_feature(m66592, ctrl);
1110 break;
1111 default:
1112 ret = 1;
1113 break;
1114 }
1115 } else
1116 ret = 1;
1117 return ret;
1118}
1119
1120static void m66592_update_usb_speed(struct m66592 *m66592)
1121{
1122 u16 speed = get_usb_speed(m66592);
1123
1124 switch (speed) {
1125 case M66592_HSMODE:
1126 m66592->gadget.speed = USB_SPEED_HIGH;
1127 break;
1128 case M66592_FSMODE:
1129 m66592->gadget.speed = USB_SPEED_FULL;
1130 break;
1131 default:
1132 m66592->gadget.speed = USB_SPEED_UNKNOWN;
1133 pr_err("USB speed unknown\n");
1134 }
1135}
1136
1137static void irq_device_state(struct m66592 *m66592)
1138{
1139 u16 dvsq;
1140
1141 dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
1142 m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);
1143
1144 if (dvsq == M66592_DS_DFLT) { /* bus reset */
1145 m66592->driver->disconnect(&m66592->gadget);
1146 m66592_update_usb_speed(m66592);
1147 }
1148 if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
1149 m66592_update_usb_speed(m66592);
1150 if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
1151 && m66592->gadget.speed == USB_SPEED_UNKNOWN)
1152 m66592_update_usb_speed(m66592);
1153
1154 m66592->old_dvsq = dvsq;
1155}
1156
1157static void irq_control_stage(struct m66592 *m66592)
1158__releases(m66592->lock)
1159__acquires(m66592->lock)
1160{
1161 struct usb_ctrlrequest ctrl;
1162 u16 ctsq;
1163
1164 ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
1165 m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);
1166
1167 switch (ctsq) {
1168 case M66592_CS_IDST: {
1169 struct m66592_ep *ep;
1170 struct m66592_request *req;
1171 ep = &m66592->ep[0];
1172 req = list_entry(ep->queue.next, struct m66592_request, queue);
1173 transfer_complete(ep, req, 0);
1174 }
1175 break;
1176
1177 case M66592_CS_RDDS:
1178 case M66592_CS_WRDS:
1179 case M66592_CS_WRND:
1180 if (setup_packet(m66592, &ctrl)) {
1181 spin_unlock(&m66592->lock);
1182 if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
1183 pipe_stall(m66592, 0);
1184 spin_lock(&m66592->lock);
1185 }
1186 break;
1187 case M66592_CS_RDSS:
1188 case M66592_CS_WRSS:
1189 control_end(m66592, 0);
1190 break;
1191 default:
1192 pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1193 break;
1194 }
1195}
1196
1197static irqreturn_t m66592_irq(int irq, void *_m66592)
1198{
1199 struct m66592 *m66592 = _m66592;
1200 u16 intsts0;
1201 u16 intenb0;
1202 u16 brdysts, nrdysts, bempsts;
1203 u16 brdyenb, nrdyenb, bempenb;
1204 u16 savepipe;
1205 u16 mask0;
1206
1207 spin_lock(&m66592->lock);
1208
1209 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1210 intenb0 = m66592_read(m66592, M66592_INTENB0);
1211
1212 if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
1213 /*
1214 * When USB clock stops, it cannot read register. Even if a
1215 * clock stops, the interrupt occurs. So this driver turn on
1216 * a clock by this timing and do re-reading of register.
1217 */
1218 m66592_start_xclock(m66592);
1219 intsts0 = m66592_read(m66592, M66592_INTSTS0);
1220 intenb0 = m66592_read(m66592, M66592_INTENB0);
1221 }
1222
1223 savepipe = m66592_read(m66592, M66592_CFIFOSEL);
1224
1225 mask0 = intsts0 & intenb0;
1226 if (mask0) {
1227 brdysts = m66592_read(m66592, M66592_BRDYSTS);
1228 nrdysts = m66592_read(m66592, M66592_NRDYSTS);
1229 bempsts = m66592_read(m66592, M66592_BEMPSTS);
1230 brdyenb = m66592_read(m66592, M66592_BRDYENB);
1231 nrdyenb = m66592_read(m66592, M66592_NRDYENB);
1232 bempenb = m66592_read(m66592, M66592_BEMPENB);
1233
1234 if (mask0 & M66592_VBINT) {
1235 m66592_write(m66592, 0xffff & ~M66592_VBINT,
1236 M66592_INTSTS0);
1237 m66592_start_xclock(m66592);
1238
1239 /* start vbus sampling */
1240 m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
1241 & M66592_VBSTS;
1242 m66592->scount = M66592_MAX_SAMPLING;
1243
1244 mod_timer(&m66592->timer,
1245 jiffies + msecs_to_jiffies(50));
1246 }
1247 if (intsts0 & M66592_DVSQ)
1248 irq_device_state(m66592);
1249
1250 if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
1251 && (brdysts & brdyenb)) {
1252 irq_pipe_ready(m66592, brdysts, brdyenb);
1253 }
1254 if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
1255 && (bempsts & bempenb)) {
1256 irq_pipe_empty(m66592, bempsts, bempenb);
1257 }
1258
1259 if (intsts0 & M66592_CTRT)
1260 irq_control_stage(m66592);
1261 }
1262
1263 m66592_write(m66592, savepipe, M66592_CFIFOSEL);
1264
1265 spin_unlock(&m66592->lock);
1266 return IRQ_HANDLED;
1267}
1268
1269static void m66592_timer(unsigned long _m66592)
1270{
1271 struct m66592 *m66592 = (struct m66592 *)_m66592;
1272 unsigned long flags;
1273 u16 tmp;
1274
1275 spin_lock_irqsave(&m66592->lock, flags);
1276 tmp = m66592_read(m66592, M66592_SYSCFG);
1277 if (!(tmp & M66592_RCKE)) {
1278 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
1279 udelay(10);
1280 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
1281 }
1282 if (m66592->scount > 0) {
1283 tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
1284 if (tmp == m66592->old_vbus) {
1285 m66592->scount--;
1286 if (m66592->scount == 0) {
1287 if (tmp == M66592_VBSTS)
1288 m66592_usb_connect(m66592);
1289 else
1290 m66592_usb_disconnect(m66592);
1291 } else {
1292 mod_timer(&m66592->timer,
1293 jiffies + msecs_to_jiffies(50));
1294 }
1295 } else {
1296 m66592->scount = M66592_MAX_SAMPLING;
1297 m66592->old_vbus = tmp;
1298 mod_timer(&m66592->timer,
1299 jiffies + msecs_to_jiffies(50));
1300 }
1301 }
1302 spin_unlock_irqrestore(&m66592->lock, flags);
1303}
1304
1305/*-------------------------------------------------------------------------*/
1306static int m66592_enable(struct usb_ep *_ep,
1307 const struct usb_endpoint_descriptor *desc)
1308{
1309 struct m66592_ep *ep;
1310
1311 ep = container_of(_ep, struct m66592_ep, ep);
1312 return alloc_pipe_config(ep, desc);
1313}
1314
1315static int m66592_disable(struct usb_ep *_ep)
1316{
1317 struct m66592_ep *ep;
1318 struct m66592_request *req;
1319 unsigned long flags;
1320
1321 ep = container_of(_ep, struct m66592_ep, ep);
1322 BUG_ON(!ep);
1323
1324 while (!list_empty(&ep->queue)) {
1325 req = list_entry(ep->queue.next, struct m66592_request, queue);
1326 spin_lock_irqsave(&ep->m66592->lock, flags);
1327 transfer_complete(ep, req, -ECONNRESET);
1328 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1329 }
1330
1331 pipe_irq_disable(ep->m66592, ep->pipenum);
1332 return free_pipe_config(ep);
1333}
1334
1335static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
1336 gfp_t gfp_flags)
1337{
1338 struct m66592_request *req;
1339
1340 req = kzalloc(sizeof(struct m66592_request), gfp_flags);
1341 if (!req)
1342 return NULL;
1343
1344 INIT_LIST_HEAD(&req->queue);
1345
1346 return &req->req;
1347}
1348
1349static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
1350{
1351 struct m66592_request *req;
1352
1353 req = container_of(_req, struct m66592_request, req);
1354 kfree(req);
1355}
1356
1357static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
1358 gfp_t gfp_flags)
1359{
1360 struct m66592_ep *ep;
1361 struct m66592_request *req;
1362 unsigned long flags;
1363 int request = 0;
1364
1365 ep = container_of(_ep, struct m66592_ep, ep);
1366 req = container_of(_req, struct m66592_request, req);
1367
1368 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
1369 return -ESHUTDOWN;
1370
1371 spin_lock_irqsave(&ep->m66592->lock, flags);
1372
1373 if (list_empty(&ep->queue))
1374 request = 1;
1375
1376 list_add_tail(&req->queue, &ep->queue);
1377 req->req.actual = 0;
1378 req->req.status = -EINPROGRESS;
1379
1380 if (ep->ep.desc == NULL) /* control */
1381 start_ep0(ep, req);
1382 else {
1383 if (request && !ep->busy)
1384 start_packet(ep, req);
1385 }
1386
1387 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1388
1389 return 0;
1390}
1391
1392static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1393{
1394 struct m66592_ep *ep;
1395 struct m66592_request *req;
1396 unsigned long flags;
1397
1398 ep = container_of(_ep, struct m66592_ep, ep);
1399 req = container_of(_req, struct m66592_request, req);
1400
1401 spin_lock_irqsave(&ep->m66592->lock, flags);
1402 if (!list_empty(&ep->queue))
1403 transfer_complete(ep, req, -ECONNRESET);
1404 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1405
1406 return 0;
1407}
1408
1409static int m66592_set_halt(struct usb_ep *_ep, int value)
1410{
1411 struct m66592_ep *ep;
1412 struct m66592_request *req;
1413 unsigned long flags;
1414 int ret = 0;
1415
1416 ep = container_of(_ep, struct m66592_ep, ep);
1417 req = list_entry(ep->queue.next, struct m66592_request, queue);
1418
1419 spin_lock_irqsave(&ep->m66592->lock, flags);
1420 if (!list_empty(&ep->queue)) {
1421 ret = -EAGAIN;
1422 goto out;
1423 }
1424 if (value) {
1425 ep->busy = 1;
1426 pipe_stall(ep->m66592, ep->pipenum);
1427 } else {
1428 ep->busy = 0;
1429 pipe_stop(ep->m66592, ep->pipenum);
1430 }
1431
1432out:
1433 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1434 return ret;
1435}
1436
1437static void m66592_fifo_flush(struct usb_ep *_ep)
1438{
1439 struct m66592_ep *ep;
1440 unsigned long flags;
1441
1442 ep = container_of(_ep, struct m66592_ep, ep);
1443 spin_lock_irqsave(&ep->m66592->lock, flags);
1444 if (list_empty(&ep->queue) && !ep->busy) {
1445 pipe_stop(ep->m66592, ep->pipenum);
1446 m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
1447 }
1448 spin_unlock_irqrestore(&ep->m66592->lock, flags);
1449}
1450
1451static struct usb_ep_ops m66592_ep_ops = {
1452 .enable = m66592_enable,
1453 .disable = m66592_disable,
1454
1455 .alloc_request = m66592_alloc_request,
1456 .free_request = m66592_free_request,
1457
1458 .queue = m66592_queue,
1459 .dequeue = m66592_dequeue,
1460
1461 .set_halt = m66592_set_halt,
1462 .fifo_flush = m66592_fifo_flush,
1463};
1464
1465/*-------------------------------------------------------------------------*/
1466static struct m66592 *the_controller;
1467
1468static int m66592_start(struct usb_gadget_driver *driver,
1469 int (*bind)(struct usb_gadget *))
1470{
1471 struct m66592 *m66592 = the_controller;
1472 int retval;
1473
1474 if (!driver
1475 || driver->max_speed < USB_SPEED_HIGH
1476 || !bind
1477 || !driver->setup)
1478 return -EINVAL;
1479 if (!m66592)
1480 return -ENODEV;
1481 if (m66592->driver)
1482 return -EBUSY;
1483
1484 /* hook up the driver */
1485 driver->driver.bus = NULL;
1486 m66592->driver = driver;
1487 m66592->gadget.dev.driver = &driver->driver;
1488
1489 retval = device_add(&m66592->gadget.dev);
1490 if (retval) {
1491 pr_err("device_add error (%d)\n", retval);
1492 goto error;
1493 }
1494
1495 retval = bind(&m66592->gadget);
1496 if (retval) {
1497 pr_err("bind to driver error (%d)\n", retval);
1498 device_del(&m66592->gadget.dev);
1499 goto error;
1500 }
1501
1502 m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1503 if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
1504 m66592_start_xclock(m66592);
1505 /* start vbus sampling */
1506 m66592->old_vbus = m66592_read(m66592,
1507 M66592_INTSTS0) & M66592_VBSTS;
1508 m66592->scount = M66592_MAX_SAMPLING;
1509 mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
1510 }
1511
1512 return 0;
1513
1514error:
1515 m66592->driver = NULL;
1516 m66592->gadget.dev.driver = NULL;
1517
1518 return retval;
1519}
1520
1521static int m66592_stop(struct usb_gadget_driver *driver)
1522{
1523 struct m66592 *m66592 = the_controller;
1524 unsigned long flags;
1525
1526 if (driver != m66592->driver || !driver->unbind)
1527 return -EINVAL;
1528
1529 spin_lock_irqsave(&m66592->lock, flags);
1530 if (m66592->gadget.speed != USB_SPEED_UNKNOWN)
1531 m66592_usb_disconnect(m66592);
1532 spin_unlock_irqrestore(&m66592->lock, flags);
1533
1534 m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
1535
1536 driver->unbind(&m66592->gadget);
1537 m66592->gadget.dev.driver = NULL;
1538
1539 init_controller(m66592);
1540 disable_controller(m66592);
1541
1542 device_del(&m66592->gadget.dev);
1543 m66592->driver = NULL;
1544 return 0;
1545}
1546
1547/*-------------------------------------------------------------------------*/
1548static int m66592_get_frame(struct usb_gadget *_gadget)
1549{
1550 struct m66592 *m66592 = gadget_to_m66592(_gadget);
1551 return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
1552}
1553
1554static int m66592_pullup(struct usb_gadget *gadget, int is_on)
1555{
1556 struct m66592 *m66592 = gadget_to_m66592(gadget);
1557 unsigned long flags;
1558
1559 spin_lock_irqsave(&m66592->lock, flags);
1560 if (is_on)
1561 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
1562 else
1563 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
1564 spin_unlock_irqrestore(&m66592->lock, flags);
1565
1566 return 0;
1567}
1568
1569static struct usb_gadget_ops m66592_gadget_ops = {
1570 .get_frame = m66592_get_frame,
1571 .start = m66592_start,
1572 .stop = m66592_stop,
1573 .pullup = m66592_pullup,
1574};
1575
1576static int __exit m66592_remove(struct platform_device *pdev)
1577{
1578 struct m66592 *m66592 = dev_get_drvdata(&pdev->dev);
1579
1580 usb_del_gadget_udc(&m66592->gadget);
1581
1582 del_timer_sync(&m66592->timer);
1583 iounmap(m66592->reg);
1584 free_irq(platform_get_irq(pdev, 0), m66592);
1585 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1586#ifdef CONFIG_HAVE_CLK
1587 if (m66592->pdata->on_chip) {
1588 clk_disable(m66592->clk);
1589 clk_put(m66592->clk);
1590 }
1591#endif
1592 kfree(m66592);
1593 return 0;
1594}
1595
1596static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1597{
1598}
1599
1600static int __init m66592_probe(struct platform_device *pdev)
1601{
1602 struct resource *res, *ires;
1603 void __iomem *reg = NULL;
1604 struct m66592 *m66592 = NULL;
1605#ifdef CONFIG_HAVE_CLK
1606 char clk_name[8];
1607#endif
1608 int ret = 0;
1609 int i;
1610
1611 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1612 if (!res) {
1613 ret = -ENODEV;
1614 pr_err("platform_get_resource error.\n");
1615 goto clean_up;
1616 }
1617
1618 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1619 if (!ires) {
1620 ret = -ENODEV;
1621 dev_err(&pdev->dev,
1622 "platform_get_resource IORESOURCE_IRQ error.\n");
1623 goto clean_up;
1624 }
1625
1626 reg = ioremap(res->start, resource_size(res));
1627 if (reg == NULL) {
1628 ret = -ENOMEM;
1629 pr_err("ioremap error.\n");
1630 goto clean_up;
1631 }
1632
1633 if (pdev->dev.platform_data == NULL) {
1634 dev_err(&pdev->dev, "no platform data\n");
1635 ret = -ENODEV;
1636 goto clean_up;
1637 }
1638
1639 /* initialize ucd */
1640 m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
1641 if (m66592 == NULL) {
1642 ret = -ENOMEM;
1643 pr_err("kzalloc error\n");
1644 goto clean_up;
1645 }
1646
1647 m66592->pdata = pdev->dev.platform_data;
1648 m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1649
1650 spin_lock_init(&m66592->lock);
1651 dev_set_drvdata(&pdev->dev, m66592);
1652
1653 m66592->gadget.ops = &m66592_gadget_ops;
1654 device_initialize(&m66592->gadget.dev);
1655 dev_set_name(&m66592->gadget.dev, "gadget");
1656 m66592->gadget.max_speed = USB_SPEED_HIGH;
1657 m66592->gadget.dev.parent = &pdev->dev;
1658 m66592->gadget.dev.dma_mask = pdev->dev.dma_mask;
1659 m66592->gadget.dev.release = pdev->dev.release;
1660 m66592->gadget.name = udc_name;
1661
1662 init_timer(&m66592->timer);
1663 m66592->timer.function = m66592_timer;
1664 m66592->timer.data = (unsigned long)m66592;
1665 m66592->reg = reg;
1666
1667 ret = request_irq(ires->start, m66592_irq, IRQF_SHARED,
1668 udc_name, m66592);
1669 if (ret < 0) {
1670 pr_err("request_irq error (%d)\n", ret);
1671 goto clean_up;
1672 }
1673
1674#ifdef CONFIG_HAVE_CLK
1675 if (m66592->pdata->on_chip) {
1676 snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
1677 m66592->clk = clk_get(&pdev->dev, clk_name);
1678 if (IS_ERR(m66592->clk)) {
1679 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1680 clk_name);
1681 ret = PTR_ERR(m66592->clk);
1682 goto clean_up2;
1683 }
1684 clk_enable(m66592->clk);
1685 }
1686#endif
1687 INIT_LIST_HEAD(&m66592->gadget.ep_list);
1688 m66592->gadget.ep0 = &m66592->ep[0].ep;
1689 INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
1690 for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
1691 struct m66592_ep *ep = &m66592->ep[i];
1692
1693 if (i != 0) {
1694 INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
1695 list_add_tail(&m66592->ep[i].ep.ep_list,
1696 &m66592->gadget.ep_list);
1697 }
1698 ep->m66592 = m66592;
1699 INIT_LIST_HEAD(&ep->queue);
1700 ep->ep.name = m66592_ep_name[i];
1701 ep->ep.ops = &m66592_ep_ops;
1702 ep->ep.maxpacket = 512;
1703 }
1704 m66592->ep[0].ep.maxpacket = 64;
1705 m66592->ep[0].pipenum = 0;
1706 m66592->ep[0].fifoaddr = M66592_CFIFO;
1707 m66592->ep[0].fifosel = M66592_CFIFOSEL;
1708 m66592->ep[0].fifoctr = M66592_CFIFOCTR;
1709 m66592->ep[0].fifotrn = 0;
1710 m66592->ep[0].pipectr = get_pipectr_addr(0);
1711 m66592->pipenum2ep[0] = &m66592->ep[0];
1712 m66592->epaddr2ep[0] = &m66592->ep[0];
1713
1714 the_controller = m66592;
1715
1716 m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
1717 if (m66592->ep0_req == NULL)
1718 goto clean_up3;
1719 m66592->ep0_req->complete = nop_completion;
1720
1721 init_controller(m66592);
1722
1723 ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
1724 if (ret)
1725 goto err_add_udc;
1726
1727 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1728 return 0;
1729
1730err_add_udc:
1731 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1732
1733clean_up3:
1734#ifdef CONFIG_HAVE_CLK
1735 if (m66592->pdata->on_chip) {
1736 clk_disable(m66592->clk);
1737 clk_put(m66592->clk);
1738 }
1739clean_up2:
1740#endif
1741 free_irq(ires->start, m66592);
1742clean_up:
1743 if (m66592) {
1744 if (m66592->ep0_req)
1745 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1746 kfree(m66592);
1747 }
1748 if (reg)
1749 iounmap(reg);
1750
1751 return ret;
1752}
1753
1754/*-------------------------------------------------------------------------*/
1755static struct platform_driver m66592_driver = {
1756 .remove = __exit_p(m66592_remove),
1757 .driver = {
1758 .name = (char *) udc_name,
1759 .owner = THIS_MODULE,
1760 },
1761};
1762
1763static int __init m66592_udc_init(void)
1764{
1765 return platform_driver_probe(&m66592_driver, m66592_probe);
1766}
1767module_init(m66592_udc_init);
1768
1769static void __exit m66592_udc_cleanup(void)
1770{
1771 platform_driver_unregister(&m66592_driver);
1772}
1773module_exit(m66592_udc_cleanup);