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gerrit-public.fairphone.software / kernel / msm / c41442474a26984abaa094e96e42182868eab658 / . / drivers / usb / gadget / r8a66597-udc.c
blob: cc0ba68efa55bda7937d1d299c2c6ca542610505 [file] [log] [blame]
Yoshihiro Shimodac4144242009-08-19 04:59:39 +0000[diff] [blame^]1/*
2 * R8A66597 UDC (USB gadget)
3 *
4 * Copyright (C) 2006-2009 Renesas Solutions Corp.
5 *
6 * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 */
22
23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/delay.h>
26#include <linux/io.h>
27#include <linux/platform_device.h>
28
29#include <linux/usb/ch9.h>
30#include <linux/usb/gadget.h>
31
32#include "r8a66597-udc.h"
33
34#define DRIVER_VERSION "2009-08-18"
35
36static const char udc_name[] = "r8a66597_udc";
37static const char *r8a66597_ep_name[] = {
38 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7",
39 "ep8", "ep9",
40};
41
42static void disable_controller(struct r8a66597 *r8a66597);
43static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
44static void irq_packet_write(struct r8a66597_ep *ep,
45 struct r8a66597_request *req);
46static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
47 gfp_t gfp_flags);
48
49static void transfer_complete(struct r8a66597_ep *ep,
50 struct r8a66597_request *req, int status);
51
52/*-------------------------------------------------------------------------*/
53static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
54{
55 return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
56}
57
58static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
59 unsigned long reg)
60{
61 u16 tmp;
62
63 tmp = r8a66597_read(r8a66597, INTENB0);
64 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
65 INTENB0);
66 r8a66597_bset(r8a66597, (1 << pipenum), reg);
67 r8a66597_write(r8a66597, tmp, INTENB0);
68}
69
70static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
71 unsigned long reg)
72{
73 u16 tmp;
74
75 tmp = r8a66597_read(r8a66597, INTENB0);
76 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
77 INTENB0);
78 r8a66597_bclr(r8a66597, (1 << pipenum), reg);
79 r8a66597_write(r8a66597, tmp, INTENB0);
80}
81
82static void r8a66597_usb_connect(struct r8a66597 *r8a66597)
83{
84 r8a66597_bset(r8a66597, CTRE, INTENB0);
85 r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
86
87 r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
88}
89
90static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
91__releases(r8a66597->lock)
92__acquires(r8a66597->lock)
93{
94 r8a66597_bclr(r8a66597, CTRE, INTENB0);
95 r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
96 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
97
98 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
99 spin_unlock(&r8a66597->lock);
100 r8a66597->driver->disconnect(&r8a66597->gadget);
101 spin_lock(&r8a66597->lock);
102
103 disable_controller(r8a66597);
104 INIT_LIST_HEAD(&r8a66597->ep[0].queue);
105}
106
107static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
108{
109 u16 pid = 0;
110 unsigned long offset;
111
112 if (pipenum == 0)
113 pid = r8a66597_read(r8a66597, DCPCTR) & PID;
114 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
115 offset = get_pipectr_addr(pipenum);
116 pid = r8a66597_read(r8a66597, offset) & PID;
117 } else
118 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
119
120 return pid;
121}
122
123static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
124 u16 pid)
125{
126 unsigned long offset;
127
128 if (pipenum == 0)
129 r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
130 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
131 offset = get_pipectr_addr(pipenum);
132 r8a66597_mdfy(r8a66597, pid, PID, offset);
133 } else
134 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
135}
136
137static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
138{
139 control_reg_set_pid(r8a66597, pipenum, PID_BUF);
140}
141
142static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
143{
144 control_reg_set_pid(r8a66597, pipenum, PID_NAK);
145}
146
147static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
148{
149 control_reg_set_pid(r8a66597, pipenum, PID_STALL);
150}
151
152static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
153{
154 u16 ret = 0;
155 unsigned long offset;
156
157 if (pipenum == 0)
158 ret = r8a66597_read(r8a66597, DCPCTR);
159 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
160 offset = get_pipectr_addr(pipenum);
161 ret = r8a66597_read(r8a66597, offset);
162 } else
163 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
164
165 return ret;
166}
167
168static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
169{
170 unsigned long offset;
171
172 pipe_stop(r8a66597, pipenum);
173
174 if (pipenum == 0)
175 r8a66597_bset(r8a66597, SQCLR, DCPCTR);
176 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
177 offset = get_pipectr_addr(pipenum);
178 r8a66597_bset(r8a66597, SQCLR, offset);
179 } else
180 printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
181}
182
183static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
184{
185 u16 tmp;
186 int size;
187
188 if (pipenum == 0) {
189 tmp = r8a66597_read(r8a66597, DCPCFG);
190 if ((tmp & R8A66597_CNTMD) != 0)
191 size = 256;
192 else {
193 tmp = r8a66597_read(r8a66597, DCPMAXP);
194 size = tmp & MAXP;
195 }
196 } else {
197 r8a66597_write(r8a66597, pipenum, PIPESEL);
198 tmp = r8a66597_read(r8a66597, PIPECFG);
199 if ((tmp & R8A66597_CNTMD) != 0) {
200 tmp = r8a66597_read(r8a66597, PIPEBUF);
201 size = ((tmp >> 10) + 1) * 64;
202 } else {
203 tmp = r8a66597_read(r8a66597, PIPEMAXP);
204 size = tmp & MXPS;
205 }
206 }
207
208 return size;
209}
210
211static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
212{
213 if (r8a66597->pdata->on_chip)
214 return MBW_32;
215 else
216 return MBW_16;
217}
218
219static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
220{
221 struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
222
223 if (ep->use_dma)
224 return;
225
226 r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
227
228 ndelay(450);
229
230 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
231}
232
233static int pipe_buffer_setting(struct r8a66597 *r8a66597,
234 struct r8a66597_pipe_info *info)
235{
236 u16 bufnum = 0, buf_bsize = 0;
237 u16 pipecfg = 0;
238
239 if (info->pipe == 0)
240 return -EINVAL;
241
242 r8a66597_write(r8a66597, info->pipe, PIPESEL);
243
244 if (info->dir_in)
245 pipecfg |= R8A66597_DIR;
246 pipecfg |= info->type;
247 pipecfg |= info->epnum;
248 switch (info->type) {
249 case R8A66597_INT:
250 bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
251 buf_bsize = 0;
252 break;
253 case R8A66597_BULK:
254 bufnum = r8a66597->bi_bufnum +
255 (info->pipe - R8A66597_BASE_PIPENUM_BULK) * 16;
256 r8a66597->bi_bufnum += 16;
257 buf_bsize = 7;
258 pipecfg |= R8A66597_DBLB;
259 if (!info->dir_in)
260 pipecfg |= R8A66597_SHTNAK;
261 break;
262 case R8A66597_ISO:
263 bufnum = r8a66597->bi_bufnum +
264 (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
265 r8a66597->bi_bufnum += 16;
266 buf_bsize = 7;
267 break;
268 }
269 if (r8a66597->bi_bufnum > R8A66597_MAX_BUFNUM) {
270 printk(KERN_ERR "r8a66597 pipe memory is insufficient(%d)\n",
271 r8a66597->bi_bufnum);
272 return -ENOMEM;
273 }
274
275 r8a66597_write(r8a66597, pipecfg, PIPECFG);
276 r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
277 r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
278 if (info->interval)
279 info->interval--;
280 r8a66597_write(r8a66597, info->interval, PIPEPERI);
281
282 return 0;
283}
284
285static void pipe_buffer_release(struct r8a66597 *r8a66597,
286 struct r8a66597_pipe_info *info)
287{
288 if (info->pipe == 0)
289 return;
290
291 switch (info->type) {
292 case R8A66597_BULK:
293 if (is_bulk_pipe(info->pipe))
294 r8a66597->bi_bufnum -= 16;
295 break;
296 case R8A66597_ISO:
297 if (is_isoc_pipe(info->pipe))
298 r8a66597->bi_bufnum -= 16;
299 break;
300 }
301
302 if (is_bulk_pipe(info->pipe))
303 r8a66597->bulk--;
304 else if (is_interrupt_pipe(info->pipe))
305 r8a66597->interrupt--;
306 else if (is_isoc_pipe(info->pipe)) {
307 r8a66597->isochronous--;
308 if (info->type == R8A66597_BULK)
309 r8a66597->bulk--;
310 } else
311 printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
312 info->pipe);
313}
314
315static void pipe_initialize(struct r8a66597_ep *ep)
316{
317 struct r8a66597 *r8a66597 = ep->r8a66597;
318
319 r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
320
321 r8a66597_write(r8a66597, ACLRM, ep->pipectr);
322 r8a66597_write(r8a66597, 0, ep->pipectr);
323 r8a66597_write(r8a66597, SQCLR, ep->pipectr);
324 if (ep->use_dma) {
325 r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
326
327 ndelay(450);
328
329 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
330 }
331}
332
333static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
334 struct r8a66597_ep *ep,
335 const struct usb_endpoint_descriptor *desc,
336 u16 pipenum, int dma)
337{
338 ep->use_dma = 0;
339 ep->fifoaddr = CFIFO;
340 ep->fifosel = CFIFOSEL;
341 ep->fifoctr = CFIFOCTR;
342 ep->fifotrn = 0;
343
344 ep->pipectr = get_pipectr_addr(pipenum);
345 ep->pipenum = pipenum;
346 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
347 r8a66597->pipenum2ep[pipenum] = ep;
348 r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
349 = ep;
350 INIT_LIST_HEAD(&ep->queue);
351}
352
353static void r8a66597_ep_release(struct r8a66597_ep *ep)
354{
355 struct r8a66597 *r8a66597 = ep->r8a66597;
356 u16 pipenum = ep->pipenum;
357
358 if (pipenum == 0)
359 return;
360
361 if (ep->use_dma)
362 r8a66597->num_dma--;
363 ep->pipenum = 0;
364 ep->busy = 0;
365 ep->use_dma = 0;
366}
367
368static int alloc_pipe_config(struct r8a66597_ep *ep,
369 const struct usb_endpoint_descriptor *desc)
370{
371 struct r8a66597 *r8a66597 = ep->r8a66597;
372 struct r8a66597_pipe_info info;
373 int dma = 0;
374 unsigned char *counter;
375 int ret;
376
377 ep->desc = desc;
378
379 if (ep->pipenum) /* already allocated pipe */
380 return 0;
381
382 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
383 case USB_ENDPOINT_XFER_BULK:
384 if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
385 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
386 printk(KERN_ERR "bulk pipe is insufficient\n");
387 return -ENODEV;
388 } else {
389 info.pipe = R8A66597_BASE_PIPENUM_ISOC
390 + r8a66597->isochronous;
391 counter = &r8a66597->isochronous;
392 }
393 } else {
394 info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
395 counter = &r8a66597->bulk;
396 }
397 info.type = R8A66597_BULK;
398 dma = 1;
399 break;
400 case USB_ENDPOINT_XFER_INT:
401 if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
402 printk(KERN_ERR "interrupt pipe is insufficient\n");
403 return -ENODEV;
404 }
405 info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
406 info.type = R8A66597_INT;
407 counter = &r8a66597->interrupt;
408 break;
409 case USB_ENDPOINT_XFER_ISOC:
410 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
411 printk(KERN_ERR "isochronous pipe is insufficient\n");
412 return -ENODEV;
413 }
414 info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
415 info.type = R8A66597_ISO;
416 counter = &r8a66597->isochronous;
417 break;
418 default:
419 printk(KERN_ERR "unexpect xfer type\n");
420 return -EINVAL;
421 }
422 ep->type = info.type;
423
424 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
425 info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
426 info.interval = desc->bInterval;
427 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
428 info.dir_in = 1;
429 else
430 info.dir_in = 0;
431
432 ret = pipe_buffer_setting(r8a66597, &info);
433 if (ret < 0) {
434 printk(KERN_ERR "pipe_buffer_setting fail\n");
435 return ret;
436 }
437
438 (*counter)++;
439 if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
440 r8a66597->bulk++;
441
442 r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
443 pipe_initialize(ep);
444
445 return 0;
446}
447
448static int free_pipe_config(struct r8a66597_ep *ep)
449{
450 struct r8a66597 *r8a66597 = ep->r8a66597;
451 struct r8a66597_pipe_info info;
452
453 info.pipe = ep->pipenum;
454 info.type = ep->type;
455 pipe_buffer_release(r8a66597, &info);
456 r8a66597_ep_release(ep);
457
458 return 0;
459}
460
461/*-------------------------------------------------------------------------*/
462static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
463{
464 enable_irq_ready(r8a66597, pipenum);
465 enable_irq_nrdy(r8a66597, pipenum);
466}
467
468static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
469{
470 disable_irq_ready(r8a66597, pipenum);
471 disable_irq_nrdy(r8a66597, pipenum);
472}
473
474/* if complete is true, gadget driver complete function is not call */
475static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
476{
477 r8a66597->ep[0].internal_ccpl = ccpl;
478 pipe_start(r8a66597, 0);
479 r8a66597_bset(r8a66597, CCPL, DCPCTR);
480}
481
482static void start_ep0_write(struct r8a66597_ep *ep,
483 struct r8a66597_request *req)
484{
485 struct r8a66597 *r8a66597 = ep->r8a66597;
486
487 pipe_change(r8a66597, ep->pipenum);
488 r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
489 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
490 if (req->req.length == 0) {
491 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
492 pipe_start(r8a66597, 0);
493 transfer_complete(ep, req, 0);
494 } else {
495 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
496 irq_ep0_write(ep, req);
497 }
498}
499
500static void start_packet_write(struct r8a66597_ep *ep,
501 struct r8a66597_request *req)
502{
503 struct r8a66597 *r8a66597 = ep->r8a66597;
504 u16 tmp;
505
506 pipe_change(r8a66597, ep->pipenum);
507 disable_irq_empty(r8a66597, ep->pipenum);
508 pipe_start(r8a66597, ep->pipenum);
509
510 tmp = r8a66597_read(r8a66597, ep->fifoctr);
511 if (unlikely((tmp & FRDY) == 0))
512 pipe_irq_enable(r8a66597, ep->pipenum);
513 else
514 irq_packet_write(ep, req);
515}
516
517static void start_packet_read(struct r8a66597_ep *ep,
518 struct r8a66597_request *req)
519{
520 struct r8a66597 *r8a66597 = ep->r8a66597;
521 u16 pipenum = ep->pipenum;
522
523 if (ep->pipenum == 0) {
524 r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
525 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
526 pipe_start(r8a66597, pipenum);
527 pipe_irq_enable(r8a66597, pipenum);
528 } else {
529 if (ep->use_dma) {
530 r8a66597_bset(r8a66597, TRCLR, ep->fifosel);
531 pipe_change(r8a66597, pipenum);
532 r8a66597_bset(r8a66597, TRENB, ep->fifosel);
533 r8a66597_write(r8a66597,
534 (req->req.length + ep->ep.maxpacket - 1)
535 / ep->ep.maxpacket,
536 ep->fifotrn);
537 }
538 pipe_start(r8a66597, pipenum); /* trigger once */
539 pipe_irq_enable(r8a66597, pipenum);
540 }
541}
542
543static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
544{
545 if (ep->desc->bEndpointAddress & USB_DIR_IN)
546 start_packet_write(ep, req);
547 else
548 start_packet_read(ep, req);
549}
550
551static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req)
552{
553 u16 ctsq;
554
555 ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
556
557 switch (ctsq) {
558 case CS_RDDS:
559 start_ep0_write(ep, req);
560 break;
561 case CS_WRDS:
562 start_packet_read(ep, req);
563 break;
564
565 case CS_WRND:
566 control_end(ep->r8a66597, 0);
567 break;
568 default:
569 printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
570 break;
571 }
572}
573
574static void init_controller(struct r8a66597 *r8a66597)
575{
576 u16 vif = r8a66597->pdata->vif ? LDRV : 0;
577 u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
578 u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
579
580 if (r8a66597->pdata->on_chip) {
581 r8a66597_bset(r8a66597, 0x04, SYSCFG1);
582 r8a66597_bset(r8a66597, HSE, SYSCFG0);
583
584 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
585 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
586 r8a66597_bset(r8a66597, USBE, SYSCFG0);
587
588 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
589
590 r8a66597_bset(r8a66597, irq_sense, INTENB1);
591 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
592 DMA0CFG);
593 } else {
594 r8a66597_bset(r8a66597, vif | endian, PINCFG);
595 r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
596 r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
597 XTAL, SYSCFG0);
598
599 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
600 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
601 r8a66597_bset(r8a66597, USBE, SYSCFG0);
602
603 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
604
605 msleep(3);
606
607 r8a66597_bset(r8a66597, PLLC, SYSCFG0);
608
609 msleep(1);
610
611 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
612
613 r8a66597_bset(r8a66597, irq_sense, INTENB1);
614 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
615 DMA0CFG);
616 }
617}
618
619static void disable_controller(struct r8a66597 *r8a66597)
620{
621 if (r8a66597->pdata->on_chip) {
622 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
623
624 r8a66597_write(r8a66597, 0, INTENB0);
625 r8a66597_write(r8a66597, 0, INTENB1);
626
627 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
628 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
629
630 } else {
631 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
632 udelay(1);
633 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
634 udelay(1);
635 udelay(1);
636 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
637 }
638}
639
640static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
641{
642 u16 tmp;
643
644 if (!r8a66597->pdata->on_chip) {
645 tmp = r8a66597_read(r8a66597, SYSCFG0);
646 if (!(tmp & XCKE))
647 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
648 }
649}
650
651static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
652{
653 return list_entry(ep->queue.next, struct r8a66597_request, queue);
654}
655
656/*-------------------------------------------------------------------------*/
657static void transfer_complete(struct r8a66597_ep *ep,
658 struct r8a66597_request *req, int status)
659__releases(r8a66597->lock)
660__acquires(r8a66597->lock)
661{
662 int restart = 0;
663
664 if (unlikely(ep->pipenum == 0)) {
665 if (ep->internal_ccpl) {
666 ep->internal_ccpl = 0;
667 return;
668 }
669 }
670
671 list_del_init(&req->queue);
672 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
673 req->req.status = -ESHUTDOWN;
674 else
675 req->req.status = status;
676
677 if (!list_empty(&ep->queue))
678 restart = 1;
679
680 spin_unlock(&ep->r8a66597->lock);
681 req->req.complete(&ep->ep, &req->req);
682 spin_lock(&ep->r8a66597->lock);
683
684 if (restart) {
685 req = get_request_from_ep(ep);
686 if (ep->desc)
687 start_packet(ep, req);
688 }
689}
690
691static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
692{
693 int i;
694 u16 tmp;
695 unsigned bufsize;
696 size_t size;
697 void *buf;
698 u16 pipenum = ep->pipenum;
699 struct r8a66597 *r8a66597 = ep->r8a66597;
700
701 pipe_change(r8a66597, pipenum);
702 r8a66597_bset(r8a66597, ISEL, ep->fifosel);
703
704 i = 0;
705 do {
706 tmp = r8a66597_read(r8a66597, ep->fifoctr);
707 if (i++ > 100000) {
708 printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus"
709 "conflict. please power off this controller.");
710 return;
711 }
712 ndelay(1);
713 } while ((tmp & FRDY) == 0);
714
715 /* prepare parameters */
716 bufsize = get_buffer_size(r8a66597, pipenum);
717 buf = req->req.buf + req->req.actual;
718 size = min(bufsize, req->req.length - req->req.actual);
719
720 /* write fifo */
721 if (req->req.buf) {
722 if (size > 0)
723 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
724 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
725 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
726 }
727
728 /* update parameters */
729 req->req.actual += size;
730
731 /* check transfer finish */
732 if ((!req->req.zero && (req->req.actual == req->req.length))
733 || (size % ep->ep.maxpacket)
734 || (size == 0)) {
735 disable_irq_ready(r8a66597, pipenum);
736 disable_irq_empty(r8a66597, pipenum);
737 } else {
738 disable_irq_ready(r8a66597, pipenum);
739 enable_irq_empty(r8a66597, pipenum);
740 }
741 pipe_start(r8a66597, pipenum);
742}
743
744static void irq_packet_write(struct r8a66597_ep *ep,
745 struct r8a66597_request *req)
746{
747 u16 tmp;
748 unsigned bufsize;
749 size_t size;
750 void *buf;
751 u16 pipenum = ep->pipenum;
752 struct r8a66597 *r8a66597 = ep->r8a66597;
753
754 pipe_change(r8a66597, pipenum);
755 tmp = r8a66597_read(r8a66597, ep->fifoctr);
756 if (unlikely((tmp & FRDY) == 0)) {
757 pipe_stop(r8a66597, pipenum);
758 pipe_irq_disable(r8a66597, pipenum);
759 printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
760 return;
761 }
762
763 /* prepare parameters */
764 bufsize = get_buffer_size(r8a66597, 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 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
771 if ((size == 0)
772 || ((size % ep->ep.maxpacket) != 0)
773 || ((bufsize != ep->ep.maxpacket)
774 && (bufsize > size)))
775 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
776 }
777
778 /* update parameters */
779 req->req.actual += size;
780 /* check transfer finish */
781 if ((!req->req.zero && (req->req.actual == req->req.length))
782 || (size % ep->ep.maxpacket)
783 || (size == 0)) {
784 disable_irq_ready(r8a66597, pipenum);
785 enable_irq_empty(r8a66597, pipenum);
786 } else {
787 disable_irq_empty(r8a66597, pipenum);
788 pipe_irq_enable(r8a66597, pipenum);
789 }
790}
791
792static void irq_packet_read(struct r8a66597_ep *ep,
793 struct r8a66597_request *req)
794{
795 u16 tmp;
796 int rcv_len, bufsize, req_len;
797 int size;
798 void *buf;
799 u16 pipenum = ep->pipenum;
800 struct r8a66597 *r8a66597 = ep->r8a66597;
801 int finish = 0;
802
803 pipe_change(r8a66597, pipenum);
804 tmp = r8a66597_read(r8a66597, ep->fifoctr);
805 if (unlikely((tmp & FRDY) == 0)) {
806 req->req.status = -EPIPE;
807 pipe_stop(r8a66597, pipenum);
808 pipe_irq_disable(r8a66597, pipenum);
809 printk(KERN_ERR "read fifo not ready");
810 return;
811 }
812
813 /* prepare parameters */
814 rcv_len = tmp & DTLN;
815 bufsize = get_buffer_size(r8a66597, pipenum);
816
817 buf = req->req.buf + req->req.actual;
818 req_len = req->req.length - req->req.actual;
819 if (rcv_len < bufsize)
820 size = min(rcv_len, req_len);
821 else
822 size = min(bufsize, req_len);
823
824 /* update parameters */
825 req->req.actual += size;
826
827 /* check transfer finish */
828 if ((!req->req.zero && (req->req.actual == req->req.length))
829 || (size % ep->ep.maxpacket)
830 || (size == 0)) {
831 pipe_stop(r8a66597, pipenum);
832 pipe_irq_disable(r8a66597, pipenum);
833 finish = 1;
834 }
835
836 /* read fifo */
837 if (req->req.buf) {
838 if (size == 0)
839 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
840 else
841 r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
842
843 }
844
845 if ((ep->pipenum != 0) && finish)
846 transfer_complete(ep, req, 0);
847}
848
849static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
850{
851 u16 check;
852 u16 pipenum;
853 struct r8a66597_ep *ep;
854 struct r8a66597_request *req;
855
856 if ((status & BRDY0) && (enb & BRDY0)) {
857 r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
858 r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
859
860 ep = &r8a66597->ep[0];
861 req = get_request_from_ep(ep);
862 irq_packet_read(ep, req);
863 } else {
864 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
865 check = 1 << pipenum;
866 if ((status & check) && (enb & check)) {
867 r8a66597_write(r8a66597, ~check, BRDYSTS);
868 ep = r8a66597->pipenum2ep[pipenum];
869 req = get_request_from_ep(ep);
870 if (ep->desc->bEndpointAddress & USB_DIR_IN)
871 irq_packet_write(ep, req);
872 else
873 irq_packet_read(ep, req);
874 }
875 }
876 }
877}
878
879static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
880{
881 u16 tmp;
882 u16 check;
883 u16 pipenum;
884 struct r8a66597_ep *ep;
885 struct r8a66597_request *req;
886
887 if ((status & BEMP0) && (enb & BEMP0)) {
888 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
889
890 ep = &r8a66597->ep[0];
891 req = get_request_from_ep(ep);
892 irq_ep0_write(ep, req);
893 } else {
894 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
895 check = 1 << pipenum;
896 if ((status & check) && (enb & check)) {
897 r8a66597_write(r8a66597, ~check, BEMPSTS);
898 tmp = control_reg_get(r8a66597, pipenum);
899 if ((tmp & INBUFM) == 0) {
900 disable_irq_empty(r8a66597, pipenum);
901 pipe_irq_disable(r8a66597, pipenum);
902 pipe_stop(r8a66597, pipenum);
903 ep = r8a66597->pipenum2ep[pipenum];
904 req = get_request_from_ep(ep);
905 if (!list_empty(&ep->queue))
906 transfer_complete(ep, req, 0);
907 }
908 }
909 }
910 }
911}
912
913static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
914__releases(r8a66597->lock)
915__acquires(r8a66597->lock)
916{
917 struct r8a66597_ep *ep;
918 u16 pid;
919 u16 status = 0;
920 u16 w_index = le16_to_cpu(ctrl->wIndex);
921
922 switch (ctrl->bRequestType & USB_RECIP_MASK) {
923 case USB_RECIP_DEVICE:
924 status = 1 << USB_DEVICE_SELF_POWERED;
925 break;
926 case USB_RECIP_INTERFACE:
927 status = 0;
928 break;
929 case USB_RECIP_ENDPOINT:
930 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
931 pid = control_reg_get_pid(r8a66597, ep->pipenum);
932 if (pid == PID_STALL)
933 status = 1 << USB_ENDPOINT_HALT;
934 else
935 status = 0;
936 break;
937 default:
938 pipe_stall(r8a66597, 0);
939 return; /* exit */
940 }
941
942 r8a66597->ep0_data = cpu_to_le16(status);
943 r8a66597->ep0_req->buf = &r8a66597->ep0_data;
944 r8a66597->ep0_req->length = 2;
945 /* AV: what happens if we get called again before that gets through? */
946 spin_unlock(&r8a66597->lock);
947 r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
948 spin_lock(&r8a66597->lock);
949}
950
951static void clear_feature(struct r8a66597 *r8a66597,
952 struct usb_ctrlrequest *ctrl)
953{
954 switch (ctrl->bRequestType & USB_RECIP_MASK) {
955 case USB_RECIP_DEVICE:
956 control_end(r8a66597, 1);
957 break;
958 case USB_RECIP_INTERFACE:
959 control_end(r8a66597, 1);
960 break;
961 case USB_RECIP_ENDPOINT: {
962 struct r8a66597_ep *ep;
963 struct r8a66597_request *req;
964 u16 w_index = le16_to_cpu(ctrl->wIndex);
965
966 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
967 pipe_stop(r8a66597, ep->pipenum);
968 control_reg_sqclr(r8a66597, ep->pipenum);
969
970 control_end(r8a66597, 1);
971
972 req = get_request_from_ep(ep);
973 if (ep->busy) {
974 ep->busy = 0;
975 if (list_empty(&ep->queue))
976 break;
977 start_packet(ep, req);
978 } else if (!list_empty(&ep->queue))
979 pipe_start(r8a66597, ep->pipenum);
980 }
981 break;
982 default:
983 pipe_stall(r8a66597, 0);
984 break;
985 }
986}
987
988static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
989{
990
991 switch (ctrl->bRequestType & USB_RECIP_MASK) {
992 case USB_RECIP_DEVICE:
993 control_end(r8a66597, 1);
994 break;
995 case USB_RECIP_INTERFACE:
996 control_end(r8a66597, 1);
997 break;
998 case USB_RECIP_ENDPOINT: {
999 struct r8a66597_ep *ep;
1000 u16 w_index = le16_to_cpu(ctrl->wIndex);
1001
1002 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1003 pipe_stall(r8a66597, ep->pipenum);
1004
1005 control_end(r8a66597, 1);
1006 }
1007 break;
1008 default:
1009 pipe_stall(r8a66597, 0);
1010 break;
1011 }
1012}
1013
1014/* if return value is true, call class driver's setup() */
1015static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
1016{
1017 u16 *p = (u16 *)ctrl;
1018 unsigned long offset = USBREQ;
1019 int i, ret = 0;
1020
1021 /* read fifo */
1022 r8a66597_write(r8a66597, ~VALID, INTSTS0);
1023
1024 for (i = 0; i < 4; i++)
1025 p[i] = r8a66597_read(r8a66597, offset + i*2);
1026
1027 /* check request */
1028 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1029 switch (ctrl->bRequest) {
1030 case USB_REQ_GET_STATUS:
1031 get_status(r8a66597, ctrl);
1032 break;
1033 case USB_REQ_CLEAR_FEATURE:
1034 clear_feature(r8a66597, ctrl);
1035 break;
1036 case USB_REQ_SET_FEATURE:
1037 set_feature(r8a66597, ctrl);
1038 break;
1039 default:
1040 ret = 1;
1041 break;
1042 }
1043 } else
1044 ret = 1;
1045 return ret;
1046}
1047
1048static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
1049{
1050 u16 speed = get_usb_speed(r8a66597);
1051
1052 switch (speed) {
1053 case HSMODE:
1054 r8a66597->gadget.speed = USB_SPEED_HIGH;
1055 break;
1056 case FSMODE:
1057 r8a66597->gadget.speed = USB_SPEED_FULL;
1058 break;
1059 default:
1060 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
1061 printk(KERN_ERR "USB speed unknown\n");
1062 }
1063}
1064
1065static void irq_device_state(struct r8a66597 *r8a66597)
1066{
1067 u16 dvsq;
1068
1069 dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
1070 r8a66597_write(r8a66597, ~DVST, INTSTS0);
1071
1072 if (dvsq == DS_DFLT) {
1073 /* bus reset */
1074 r8a66597->driver->disconnect(&r8a66597->gadget);
1075 r8a66597_update_usb_speed(r8a66597);
1076 }
1077 if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
1078 r8a66597_update_usb_speed(r8a66597);
1079 if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
1080 && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1081 r8a66597_update_usb_speed(r8a66597);
1082
1083 r8a66597->old_dvsq = dvsq;
1084}
1085
1086static void irq_control_stage(struct r8a66597 *r8a66597)
1087__releases(r8a66597->lock)
1088__acquires(r8a66597->lock)
1089{
1090 struct usb_ctrlrequest ctrl;
1091 u16 ctsq;
1092
1093 ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
1094 r8a66597_write(r8a66597, ~CTRT, INTSTS0);
1095
1096 switch (ctsq) {
1097 case CS_IDST: {
1098 struct r8a66597_ep *ep;
1099 struct r8a66597_request *req;
1100 ep = &r8a66597->ep[0];
1101 req = get_request_from_ep(ep);
1102 transfer_complete(ep, req, 0);
1103 }
1104 break;
1105
1106 case CS_RDDS:
1107 case CS_WRDS:
1108 case CS_WRND:
1109 if (setup_packet(r8a66597, &ctrl)) {
1110 spin_unlock(&r8a66597->lock);
1111 if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
1112 < 0)
1113 pipe_stall(r8a66597, 0);
1114 spin_lock(&r8a66597->lock);
1115 }
1116 break;
1117 case CS_RDSS:
1118 case CS_WRSS:
1119 control_end(r8a66597, 0);
1120 break;
1121 default:
1122 printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1123 break;
1124 }
1125}
1126
1127static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
1128{
1129 struct r8a66597 *r8a66597 = _r8a66597;
1130 u16 intsts0;
1131 u16 intenb0;
1132 u16 brdysts, nrdysts, bempsts;
1133 u16 brdyenb, nrdyenb, bempenb;
1134 u16 savepipe;
1135 u16 mask0;
1136
1137 spin_lock(&r8a66597->lock);
1138
1139 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1140 intenb0 = r8a66597_read(r8a66597, INTENB0);
1141
1142 savepipe = r8a66597_read(r8a66597, CFIFOSEL);
1143
1144 mask0 = intsts0 & intenb0;
1145 if (mask0) {
1146 brdysts = r8a66597_read(r8a66597, BRDYSTS);
1147 nrdysts = r8a66597_read(r8a66597, NRDYSTS);
1148 bempsts = r8a66597_read(r8a66597, BEMPSTS);
1149 brdyenb = r8a66597_read(r8a66597, BRDYENB);
1150 nrdyenb = r8a66597_read(r8a66597, NRDYENB);
1151 bempenb = r8a66597_read(r8a66597, BEMPENB);
1152
1153 if (mask0 & VBINT) {
1154 r8a66597_write(r8a66597, 0xffff & ~VBINT,
1155 INTSTS0);
1156 r8a66597_start_xclock(r8a66597);
1157
1158 /* start vbus sampling */
1159 r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
1160 & VBSTS;
1161 r8a66597->scount = R8A66597_MAX_SAMPLING;
1162
1163 mod_timer(&r8a66597->timer,
1164 jiffies + msecs_to_jiffies(50));
1165 }
1166 if (intsts0 & DVSQ)
1167 irq_device_state(r8a66597);
1168
1169 if ((intsts0 & BRDY) && (intenb0 & BRDYE)
1170 && (brdysts & brdyenb))
1171 irq_pipe_ready(r8a66597, brdysts, brdyenb);
1172 if ((intsts0 & BEMP) && (intenb0 & BEMPE)
1173 && (bempsts & bempenb))
1174 irq_pipe_empty(r8a66597, bempsts, bempenb);
1175
1176 if (intsts0 & CTRT)
1177 irq_control_stage(r8a66597);
1178 }
1179
1180 r8a66597_write(r8a66597, savepipe, CFIFOSEL);
1181
1182 spin_unlock(&r8a66597->lock);
1183 return IRQ_HANDLED;
1184}
1185
1186static void r8a66597_timer(unsigned long _r8a66597)
1187{
1188 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1189 unsigned long flags;
1190 u16 tmp;
1191
1192 spin_lock_irqsave(&r8a66597->lock, flags);
1193 tmp = r8a66597_read(r8a66597, SYSCFG0);
1194 if (r8a66597->scount > 0) {
1195 tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
1196 if (tmp == r8a66597->old_vbus) {
1197 r8a66597->scount--;
1198 if (r8a66597->scount == 0) {
1199 if (tmp == VBSTS)
1200 r8a66597_usb_connect(r8a66597);
1201 else
1202 r8a66597_usb_disconnect(r8a66597);
1203 } else {
1204 mod_timer(&r8a66597->timer,
1205 jiffies + msecs_to_jiffies(50));
1206 }
1207 } else {
1208 r8a66597->scount = R8A66597_MAX_SAMPLING;
1209 r8a66597->old_vbus = tmp;
1210 mod_timer(&r8a66597->timer,
1211 jiffies + msecs_to_jiffies(50));
1212 }
1213 }
1214 spin_unlock_irqrestore(&r8a66597->lock, flags);
1215}
1216
1217/*-------------------------------------------------------------------------*/
1218static int r8a66597_enable(struct usb_ep *_ep,
1219 const struct usb_endpoint_descriptor *desc)
1220{
1221 struct r8a66597_ep *ep;
1222
1223 ep = container_of(_ep, struct r8a66597_ep, ep);
1224 return alloc_pipe_config(ep, desc);
1225}
1226
1227static int r8a66597_disable(struct usb_ep *_ep)
1228{
1229 struct r8a66597_ep *ep;
1230 struct r8a66597_request *req;
1231 unsigned long flags;
1232
1233 ep = container_of(_ep, struct r8a66597_ep, ep);
1234 BUG_ON(!ep);
1235
1236 while (!list_empty(&ep->queue)) {
1237 req = get_request_from_ep(ep);
1238 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1239 transfer_complete(ep, req, -ECONNRESET);
1240 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1241 }
1242
1243 pipe_irq_disable(ep->r8a66597, ep->pipenum);
1244 return free_pipe_config(ep);
1245}
1246
1247static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
1248 gfp_t gfp_flags)
1249{
1250 struct r8a66597_request *req;
1251
1252 req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
1253 if (!req)
1254 return NULL;
1255
1256 INIT_LIST_HEAD(&req->queue);
1257
1258 return &req->req;
1259}
1260
1261static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
1262{
1263 struct r8a66597_request *req;
1264
1265 req = container_of(_req, struct r8a66597_request, req);
1266 kfree(req);
1267}
1268
1269static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
1270 gfp_t gfp_flags)
1271{
1272 struct r8a66597_ep *ep;
1273 struct r8a66597_request *req;
1274 unsigned long flags;
1275 int request = 0;
1276
1277 ep = container_of(_ep, struct r8a66597_ep, ep);
1278 req = container_of(_req, struct r8a66597_request, req);
1279
1280 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1281 return -ESHUTDOWN;
1282
1283 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1284
1285 if (list_empty(&ep->queue))
1286 request = 1;
1287
1288 list_add_tail(&req->queue, &ep->queue);
1289 req->req.actual = 0;
1290 req->req.status = -EINPROGRESS;
1291
1292 if (ep->desc == NULL) /* control */
1293 start_ep0(ep, req);
1294 else {
1295 if (request && !ep->busy)
1296 start_packet(ep, req);
1297 }
1298
1299 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1300
1301 return 0;
1302}
1303
1304static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1305{
1306 struct r8a66597_ep *ep;
1307 struct r8a66597_request *req;
1308 unsigned long flags;
1309
1310 ep = container_of(_ep, struct r8a66597_ep, ep);
1311 req = container_of(_req, struct r8a66597_request, req);
1312
1313 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1314 if (!list_empty(&ep->queue))
1315 transfer_complete(ep, req, -ECONNRESET);
1316 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1317
1318 return 0;
1319}
1320
1321static int r8a66597_set_halt(struct usb_ep *_ep, int value)
1322{
1323 struct r8a66597_ep *ep;
1324 struct r8a66597_request *req;
1325 unsigned long flags;
1326 int ret = 0;
1327
1328 ep = container_of(_ep, struct r8a66597_ep, ep);
1329 req = get_request_from_ep(ep);
1330
1331 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1332 if (!list_empty(&ep->queue)) {
1333 ret = -EAGAIN;
1334 goto out;
1335 }
1336 if (value) {
1337 ep->busy = 1;
1338 pipe_stall(ep->r8a66597, ep->pipenum);
1339 } else {
1340 ep->busy = 0;
1341 pipe_stop(ep->r8a66597, ep->pipenum);
1342 }
1343
1344out:
1345 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1346 return ret;
1347}
1348
1349static void r8a66597_fifo_flush(struct usb_ep *_ep)
1350{
1351 struct r8a66597_ep *ep;
1352 unsigned long flags;
1353
1354 ep = container_of(_ep, struct r8a66597_ep, ep);
1355 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1356 if (list_empty(&ep->queue) && !ep->busy) {
1357 pipe_stop(ep->r8a66597, ep->pipenum);
1358 r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
1359 }
1360 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1361}
1362
1363static struct usb_ep_ops r8a66597_ep_ops = {
1364 .enable = r8a66597_enable,
1365 .disable = r8a66597_disable,
1366
1367 .alloc_request = r8a66597_alloc_request,
1368 .free_request = r8a66597_free_request,
1369
1370 .queue = r8a66597_queue,
1371 .dequeue = r8a66597_dequeue,
1372
1373 .set_halt = r8a66597_set_halt,
1374 .fifo_flush = r8a66597_fifo_flush,
1375};
1376
1377/*-------------------------------------------------------------------------*/
1378static struct r8a66597 *the_controller;
1379
1380int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1381{
1382 struct r8a66597 *r8a66597 = the_controller;
1383 int retval;
1384
1385 if (!driver
1386 || driver->speed != USB_SPEED_HIGH
1387 || !driver->bind
1388 || !driver->setup)
1389 return -EINVAL;
1390 if (!r8a66597)
1391 return -ENODEV;
1392 if (r8a66597->driver)
1393 return -EBUSY;
1394
1395 /* hook up the driver */
1396 driver->driver.bus = NULL;
1397 r8a66597->driver = driver;
1398 r8a66597->gadget.dev.driver = &driver->driver;
1399
1400 retval = device_add(&r8a66597->gadget.dev);
1401 if (retval) {
1402 printk(KERN_ERR "device_add error (%d)\n", retval);
1403 goto error;
1404 }
1405
1406 retval = driver->bind(&r8a66597->gadget);
1407 if (retval) {
1408 printk(KERN_ERR "bind to driver error (%d)\n", retval);
1409 device_del(&r8a66597->gadget.dev);
1410 goto error;
1411 }
1412
1413 r8a66597_bset(r8a66597, VBSE, INTENB0);
1414 if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
1415 r8a66597_start_xclock(r8a66597);
1416 /* start vbus sampling */
1417 r8a66597->old_vbus = r8a66597_read(r8a66597,
1418 INTSTS0) & VBSTS;
1419 r8a66597->scount = R8A66597_MAX_SAMPLING;
1420 mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
1421 }
1422
1423 return 0;
1424
1425error:
1426 r8a66597->driver = NULL;
1427 r8a66597->gadget.dev.driver = NULL;
1428
1429 return retval;
1430}
1431EXPORT_SYMBOL(usb_gadget_register_driver);
1432
1433int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1434{
1435 struct r8a66597 *r8a66597 = the_controller;
1436 unsigned long flags;
1437
1438 if (driver != r8a66597->driver || !driver->unbind)
1439 return -EINVAL;
1440
1441 spin_lock_irqsave(&r8a66597->lock, flags);
1442 if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
1443 r8a66597_usb_disconnect(r8a66597);
1444 spin_unlock_irqrestore(&r8a66597->lock, flags);
1445
1446 r8a66597_bclr(r8a66597, VBSE, INTENB0);
1447
1448 driver->unbind(&r8a66597->gadget);
1449
1450 init_controller(r8a66597);
1451 disable_controller(r8a66597);
1452
1453 device_del(&r8a66597->gadget.dev);
1454 r8a66597->driver = NULL;
1455 return 0;
1456}
1457EXPORT_SYMBOL(usb_gadget_unregister_driver);
1458
1459/*-------------------------------------------------------------------------*/
1460static int r8a66597_get_frame(struct usb_gadget *_gadget)
1461{
1462 struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
1463 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1464}
1465
1466static struct usb_gadget_ops r8a66597_gadget_ops = {
1467 .get_frame = r8a66597_get_frame,
1468};
1469
1470static int __exit r8a66597_remove(struct platform_device *pdev)
1471{
1472 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
1473
1474 del_timer_sync(&r8a66597->timer);
1475 iounmap((void *)r8a66597->reg);
1476 free_irq(platform_get_irq(pdev, 0), r8a66597);
1477 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
1478 kfree(r8a66597);
1479 return 0;
1480}
1481
1482static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1483{
1484}
1485
1486static int __init r8a66597_probe(struct platform_device *pdev)
1487{
1488 struct resource *res, *ires;
1489 int irq;
1490 void __iomem *reg = NULL;
1491 struct r8a66597 *r8a66597 = NULL;
1492 int ret = 0;
1493 int i;
1494 unsigned long irq_trigger;
1495
1496 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1497 if (!res) {
1498 ret = -ENODEV;
1499 printk(KERN_ERR "platform_get_resource error.\n");
1500 goto clean_up;
1501 }
1502
1503 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1504 irq = ires->start;
1505 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1506
1507 if (irq < 0) {
1508 ret = -ENODEV;
1509 printk(KERN_ERR "platform_get_irq error.\n");
1510 goto clean_up;
1511 }
1512
1513 reg = ioremap(res->start, resource_size(res));
1514 if (reg == NULL) {
1515 ret = -ENOMEM;
1516 printk(KERN_ERR "ioremap error.\n");
1517 goto clean_up;
1518 }
1519
1520 /* initialize ucd */
1521 r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
1522 if (r8a66597 == NULL) {
1523 printk(KERN_ERR "kzalloc error\n");
1524 goto clean_up;
1525 }
1526
1527 spin_lock_init(&r8a66597->lock);
1528 dev_set_drvdata(&pdev->dev, r8a66597);
1529 r8a66597->pdata = pdev->dev.platform_data;
1530 r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
1531
1532 r8a66597->gadget.ops = &r8a66597_gadget_ops;
1533 device_initialize(&r8a66597->gadget.dev);
1534 dev_set_name(&r8a66597->gadget.dev, "gadget");
1535 r8a66597->gadget.is_dualspeed = 1;
1536 r8a66597->gadget.dev.parent = &pdev->dev;
1537 r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
1538 r8a66597->gadget.dev.release = pdev->dev.release;
1539 r8a66597->gadget.name = udc_name;
1540
1541 init_timer(&r8a66597->timer);
1542 r8a66597->timer.function = r8a66597_timer;
1543 r8a66597->timer.data = (unsigned long)r8a66597;
1544 r8a66597->reg = (unsigned long)reg;
1545
1546 r8a66597->bi_bufnum = R8A66597_BASE_BUFNUM;
1547
1548 disable_controller(r8a66597); /* make sure controller is disabled */
1549
1550 ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
1551 udc_name, r8a66597);
1552 if (ret < 0) {
1553 printk(KERN_ERR "request_irq error (%d)\n", ret);
1554 goto clean_up;
1555 }
1556
1557 INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
1558 r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
1559 INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
1560 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
1561 struct r8a66597_ep *ep = &r8a66597->ep[i];
1562
1563 if (i != 0) {
1564 INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
1565 list_add_tail(&r8a66597->ep[i].ep.ep_list,
1566 &r8a66597->gadget.ep_list);
1567 }
1568 ep->r8a66597 = r8a66597;
1569 INIT_LIST_HEAD(&ep->queue);
1570 ep->ep.name = r8a66597_ep_name[i];
1571 ep->ep.ops = &r8a66597_ep_ops;
1572 ep->ep.maxpacket = 512;
1573 }
1574 r8a66597->ep[0].ep.maxpacket = 64;
1575 r8a66597->ep[0].pipenum = 0;
1576 r8a66597->ep[0].fifoaddr = CFIFO;
1577 r8a66597->ep[0].fifosel = CFIFOSEL;
1578 r8a66597->ep[0].fifoctr = CFIFOCTR;
1579 r8a66597->ep[0].fifotrn = 0;
1580 r8a66597->ep[0].pipectr = get_pipectr_addr(0);
1581 r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
1582 r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
1583
1584 the_controller = r8a66597;
1585
1586 r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
1587 GFP_KERNEL);
1588 if (r8a66597->ep0_req == NULL)
1589 goto clean_up2;
1590 r8a66597->ep0_req->complete = nop_completion;
1591
1592 init_controller(r8a66597);
1593
1594 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1595 return 0;
1596
1597clean_up2:
1598 free_irq(irq, r8a66597);
1599clean_up:
1600 if (r8a66597) {
1601 if (r8a66597->ep0_req)
1602 r8a66597_free_request(&r8a66597->ep[0].ep,
1603 r8a66597->ep0_req);
1604 kfree(r8a66597);
1605 }
1606 if (reg)
1607 iounmap(reg);
1608
1609 return ret;
1610}
1611
1612/*-------------------------------------------------------------------------*/
1613static struct platform_driver r8a66597_driver = {
1614 .remove = __exit_p(r8a66597_remove),
1615 .driver = {
1616 .name = (char *) udc_name,
1617 },
1618};
1619
1620static int __init r8a66597_udc_init(void)
1621{
1622 return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
1623}
1624module_init(r8a66597_udc_init);
1625
1626static void __exit r8a66597_udc_cleanup(void)
1627{
1628 platform_driver_unregister(&r8a66597_driver);
1629}
1630module_exit(r8a66597_udc_cleanup);
1631
1632MODULE_DESCRIPTION("R8A66597 USB gadget driver");
1633MODULE_LICENSE("GPL");
1634MODULE_AUTHOR("Yoshihiro Shimoda");
1635