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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / usb / gadget / r8a66597-udc.c
blob20d43da319ae401a3223581fb5412154287c1582
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 #include <linux/clk.h>
29 #include <linux/err.h>
30 #include <linux/slab.h>
31
32 #include <linux/usb/ch9.h>
33 #include <linux/usb/gadget.h>
34
35 #include "r8a66597-udc.h"
36
37 #define DRIVER_VERSION "2009-08-18"
38
39 static const char udc_name[] = "r8a66597_udc";
40 static const char *r8a66597_ep_name[] = {
41 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7",
42 "ep8", "ep9",
43 };
44
45 static void init_controller(struct r8a66597 *r8a66597);
46 static void disable_controller(struct r8a66597 *r8a66597);
47 static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
48 static void irq_packet_write(struct r8a66597_ep *ep,
49 struct r8a66597_request *req);
50 static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
51 gfp_t gfp_flags);
52
53 static void transfer_complete(struct r8a66597_ep *ep,
54 struct r8a66597_request *req, int status);
55
56 /*-------------------------------------------------------------------------*/
57 static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
58 {
59 return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
60 }
61
62 static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
63 unsigned long reg)
64 {
65 u16 tmp;
66
67 tmp = r8a66597_read(r8a66597, INTENB0);
68 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
69 INTENB0);
70 r8a66597_bset(r8a66597, (1 << pipenum), reg);
71 r8a66597_write(r8a66597, tmp, INTENB0);
72 }
73
74 static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
75 unsigned long reg)
76 {
77 u16 tmp;
78
79 tmp = r8a66597_read(r8a66597, INTENB0);
80 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
81 INTENB0);
82 r8a66597_bclr(r8a66597, (1 << pipenum), reg);
83 r8a66597_write(r8a66597, tmp, INTENB0);
84 }
85
86 static void r8a66597_usb_connect(struct r8a66597 *r8a66597)
87 {
88 r8a66597_bset(r8a66597, CTRE, INTENB0);
89 r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
90
91 r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
92 }
93
94 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
95 __releases(r8a66597->lock)
96 __acquires(r8a66597->lock)
97 {
98 r8a66597_bclr(r8a66597, CTRE, INTENB0);
99 r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
100 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
101
102 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
103 spin_unlock(&r8a66597->lock);
104 r8a66597->driver->disconnect(&r8a66597->gadget);
105 spin_lock(&r8a66597->lock);
106
107 disable_controller(r8a66597);
108 init_controller(r8a66597);
109 r8a66597_bset(r8a66597, VBSE, INTENB0);
110 INIT_LIST_HEAD(&r8a66597->ep[0].queue);
111 }
112
113 static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
114 {
115 u16 pid = 0;
116 unsigned long offset;
117
118 if (pipenum == 0)
119 pid = r8a66597_read(r8a66597, DCPCTR) & PID;
120 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
121 offset = get_pipectr_addr(pipenum);
122 pid = r8a66597_read(r8a66597, offset) & PID;
123 } else
124 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
125
126 return pid;
127 }
128
129 static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
130 u16 pid)
131 {
132 unsigned long offset;
133
134 if (pipenum == 0)
135 r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
136 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
137 offset = get_pipectr_addr(pipenum);
138 r8a66597_mdfy(r8a66597, pid, PID, offset);
139 } else
140 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
141 }
142
143 static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
144 {
145 control_reg_set_pid(r8a66597, pipenum, PID_BUF);
146 }
147
148 static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
149 {
150 control_reg_set_pid(r8a66597, pipenum, PID_NAK);
151 }
152
153 static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
154 {
155 control_reg_set_pid(r8a66597, pipenum, PID_STALL);
156 }
157
158 static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
159 {
160 u16 ret = 0;
161 unsigned long offset;
162
163 if (pipenum == 0)
164 ret = r8a66597_read(r8a66597, DCPCTR);
165 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
166 offset = get_pipectr_addr(pipenum);
167 ret = r8a66597_read(r8a66597, offset);
168 } else
169 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
170
171 return ret;
172 }
173
174 static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
175 {
176 unsigned long offset;
177
178 pipe_stop(r8a66597, pipenum);
179
180 if (pipenum == 0)
181 r8a66597_bset(r8a66597, SQCLR, DCPCTR);
182 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
183 offset = get_pipectr_addr(pipenum);
184 r8a66597_bset(r8a66597, SQCLR, offset);
185 } else
186 printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
187 }
188
189 static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
190 {
191 u16 tmp;
192 int size;
193
194 if (pipenum == 0) {
195 tmp = r8a66597_read(r8a66597, DCPCFG);
196 if ((tmp & R8A66597_CNTMD) != 0)
197 size = 256;
198 else {
199 tmp = r8a66597_read(r8a66597, DCPMAXP);
200 size = tmp & MAXP;
201 }
202 } else {
203 r8a66597_write(r8a66597, pipenum, PIPESEL);
204 tmp = r8a66597_read(r8a66597, PIPECFG);
205 if ((tmp & R8A66597_CNTMD) != 0) {
206 tmp = r8a66597_read(r8a66597, PIPEBUF);
207 size = ((tmp >> 10) + 1) * 64;
208 } else {
209 tmp = r8a66597_read(r8a66597, PIPEMAXP);
210 size = tmp & MXPS;
211 }
212 }
213
214 return size;
215 }
216
217 static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
218 {
219 if (r8a66597->pdata->on_chip)
220 return MBW_32;
221 else
222 return MBW_16;
223 }
224
225 static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
226 {
227 struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
228
229 if (ep->use_dma)
230 return;
231
232 r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
233
234 ndelay(450);
235
236 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
237 }
238
239 static int pipe_buffer_setting(struct r8a66597 *r8a66597,
240 struct r8a66597_pipe_info *info)
241 {
242 u16 bufnum = 0, buf_bsize = 0;
243 u16 pipecfg = 0;
244
245 if (info->pipe == 0)
246 return -EINVAL;
247
248 r8a66597_write(r8a66597, info->pipe, PIPESEL);
249
250 if (info->dir_in)
251 pipecfg |= R8A66597_DIR;
252 pipecfg |= info->type;
253 pipecfg |= info->epnum;
254 switch (info->type) {
255 case R8A66597_INT:
256 bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
257 buf_bsize = 0;
258 break;
259 case R8A66597_BULK:
260 /* isochronous pipes may be used as bulk pipes */
261 if (info->pipe > R8A66597_BASE_PIPENUM_BULK)
262 bufnum = info->pipe - R8A66597_BASE_PIPENUM_BULK;
263 else
264 bufnum = info->pipe - R8A66597_BASE_PIPENUM_ISOC;
265
266 bufnum = R8A66597_BASE_BUFNUM + (bufnum * 16);
267 buf_bsize = 7;
268 pipecfg |= R8A66597_DBLB;
269 if (!info->dir_in)
270 pipecfg |= R8A66597_SHTNAK;
271 break;
272 case R8A66597_ISO:
273 bufnum = R8A66597_BASE_BUFNUM +
274 (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
275 buf_bsize = 7;
276 break;
277 }
278
279 if (buf_bsize && ((bufnum + 16) >= R8A66597_MAX_BUFNUM)) {
280 pr_err("r8a66597 pipe memory is insufficient\n");
281 return -ENOMEM;
282 }
283
284 r8a66597_write(r8a66597, pipecfg, PIPECFG);
285 r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
286 r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
287 if (info->interval)
288 info->interval--;
289 r8a66597_write(r8a66597, info->interval, PIPEPERI);
290
291 return 0;
292 }
293
294 static void pipe_buffer_release(struct r8a66597 *r8a66597,
295 struct r8a66597_pipe_info *info)
296 {
297 if (info->pipe == 0)
298 return;
299
300 if (is_bulk_pipe(info->pipe))
301 r8a66597->bulk--;
302 else if (is_interrupt_pipe(info->pipe))
303 r8a66597->interrupt--;
304 else if (is_isoc_pipe(info->pipe)) {
305 r8a66597->isochronous--;
306 if (info->type == R8A66597_BULK)
307 r8a66597->bulk--;
308 } else
309 printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
310 info->pipe);
311 }
312
313 static void pipe_initialize(struct r8a66597_ep *ep)
314 {
315 struct r8a66597 *r8a66597 = ep->r8a66597;
316
317 r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
318
319 r8a66597_write(r8a66597, ACLRM, ep->pipectr);
320 r8a66597_write(r8a66597, 0, ep->pipectr);
321 r8a66597_write(r8a66597, SQCLR, ep->pipectr);
322 if (ep->use_dma) {
323 r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
324
325 ndelay(450);
326
327 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
328 }
329 }
330
331 static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
332 struct r8a66597_ep *ep,
333 const struct usb_endpoint_descriptor *desc,
334 u16 pipenum, int dma)
335 {
336 ep->use_dma = 0;
337 ep->fifoaddr = CFIFO;
338 ep->fifosel = CFIFOSEL;
339 ep->fifoctr = CFIFOCTR;
340 ep->fifotrn = 0;
341
342 ep->pipectr = get_pipectr_addr(pipenum);
343 ep->pipenum = pipenum;
344 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
345 r8a66597->pipenum2ep[pipenum] = ep;
346 r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
347 = ep;
348 INIT_LIST_HEAD(&ep->queue);
349 }
350
351 static void r8a66597_ep_release(struct r8a66597_ep *ep)
352 {
353 struct r8a66597 *r8a66597 = ep->r8a66597;
354 u16 pipenum = ep->pipenum;
355
356 if (pipenum == 0)
357 return;
358
359 if (ep->use_dma)
360 r8a66597->num_dma--;
361 ep->pipenum = 0;
362 ep->busy = 0;
363 ep->use_dma = 0;
364 }
365
366 static int alloc_pipe_config(struct r8a66597_ep *ep,
367 const struct usb_endpoint_descriptor *desc)
368 {
369 struct r8a66597 *r8a66597 = ep->r8a66597;
370 struct r8a66597_pipe_info info;
371 int dma = 0;
372 unsigned char *counter;
373 int ret;
374
375 ep->desc = desc;
376
377 if (ep->pipenum) /* already allocated pipe */
378 return 0;
379
380 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
381 case USB_ENDPOINT_XFER_BULK:
382 if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
383 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
384 printk(KERN_ERR "bulk pipe is insufficient\n");
385 return -ENODEV;
386 } else {
387 info.pipe = R8A66597_BASE_PIPENUM_ISOC
388 + r8a66597->isochronous;
389 counter = &r8a66597->isochronous;
390 }
391 } else {
392 info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
393 counter = &r8a66597->bulk;
394 }
395 info.type = R8A66597_BULK;
396 dma = 1;
397 break;
398 case USB_ENDPOINT_XFER_INT:
399 if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
400 printk(KERN_ERR "interrupt pipe is insufficient\n");
401 return -ENODEV;
402 }
403 info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
404 info.type = R8A66597_INT;
405 counter = &r8a66597->interrupt;
406 break;
407 case USB_ENDPOINT_XFER_ISOC:
408 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
409 printk(KERN_ERR "isochronous pipe is insufficient\n");
410 return -ENODEV;
411 }
412 info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
413 info.type = R8A66597_ISO;
414 counter = &r8a66597->isochronous;
415 break;
416 default:
417 printk(KERN_ERR "unexpect xfer type\n");
418 return -EINVAL;
419 }
420 ep->type = info.type;
421
422 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
423 info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
424 info.interval = desc->bInterval;
425 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
426 info.dir_in = 1;
427 else
428 info.dir_in = 0;
429
430 ret = pipe_buffer_setting(r8a66597, &info);
431 if (ret < 0) {
432 printk(KERN_ERR "pipe_buffer_setting fail\n");
433 return ret;
434 }
435
436 (*counter)++;
437 if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
438 r8a66597->bulk++;
439
440 r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
441 pipe_initialize(ep);
442
443 return 0;
444 }
445
446 static int free_pipe_config(struct r8a66597_ep *ep)
447 {
448 struct r8a66597 *r8a66597 = ep->r8a66597;
449 struct r8a66597_pipe_info info;
450
451 info.pipe = ep->pipenum;
452 info.type = ep->type;
453 pipe_buffer_release(r8a66597, &info);
454 r8a66597_ep_release(ep);
455
456 return 0;
457 }
458
459 /*-------------------------------------------------------------------------*/
460 static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
461 {
462 enable_irq_ready(r8a66597, pipenum);
463 enable_irq_nrdy(r8a66597, pipenum);
464 }
465
466 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
467 {
468 disable_irq_ready(r8a66597, pipenum);
469 disable_irq_nrdy(r8a66597, pipenum);
470 }
471
472 /* if complete is true, gadget driver complete function is not call */
473 static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
474 {
475 r8a66597->ep[0].internal_ccpl = ccpl;
476 pipe_start(r8a66597, 0);
477 r8a66597_bset(r8a66597, CCPL, DCPCTR);
478 }
479
480 static void start_ep0_write(struct r8a66597_ep *ep,
481 struct r8a66597_request *req)
482 {
483 struct r8a66597 *r8a66597 = ep->r8a66597;
484
485 pipe_change(r8a66597, ep->pipenum);
486 r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
487 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
488 if (req->req.length == 0) {
489 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
490 pipe_start(r8a66597, 0);
491 transfer_complete(ep, req, 0);
492 } else {
493 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
494 irq_ep0_write(ep, req);
495 }
496 }
497
498 static void start_packet_write(struct r8a66597_ep *ep,
499 struct r8a66597_request *req)
500 {
501 struct r8a66597 *r8a66597 = ep->r8a66597;
502 u16 tmp;
503
504 pipe_change(r8a66597, ep->pipenum);
505 disable_irq_empty(r8a66597, ep->pipenum);
506 pipe_start(r8a66597, ep->pipenum);
507
508 tmp = r8a66597_read(r8a66597, ep->fifoctr);
509 if (unlikely((tmp & FRDY) == 0))
510 pipe_irq_enable(r8a66597, ep->pipenum);
511 else
512 irq_packet_write(ep, req);
513 }
514
515 static void start_packet_read(struct r8a66597_ep *ep,
516 struct r8a66597_request *req)
517 {
518 struct r8a66597 *r8a66597 = ep->r8a66597;
519 u16 pipenum = ep->pipenum;
520
521 if (ep->pipenum == 0) {
522 r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
523 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
524 pipe_start(r8a66597, pipenum);
525 pipe_irq_enable(r8a66597, pipenum);
526 } else {
527 if (ep->use_dma) {
528 r8a66597_bset(r8a66597, TRCLR, ep->fifosel);
529 pipe_change(r8a66597, pipenum);
530 r8a66597_bset(r8a66597, TRENB, ep->fifosel);
531 r8a66597_write(r8a66597,
532 (req->req.length + ep->ep.maxpacket - 1)
533 / ep->ep.maxpacket,
534 ep->fifotrn);
535 }
536 pipe_start(r8a66597, pipenum); /* trigger once */
537 pipe_irq_enable(r8a66597, pipenum);
538 }
539 }
540
541 static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
542 {
543 if (ep->desc->bEndpointAddress & USB_DIR_IN)
544 start_packet_write(ep, req);
545 else
546 start_packet_read(ep, req);
547 }
548
549 static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req)
550 {
551 u16 ctsq;
552
553 ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
554
555 switch (ctsq) {
556 case CS_RDDS:
557 start_ep0_write(ep, req);
558 break;
559 case CS_WRDS:
560 start_packet_read(ep, req);
561 break;
562
563 case CS_WRND:
564 control_end(ep->r8a66597, 0);
565 break;
566 default:
567 printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
568 break;
569 }
570 }
571
572 static void init_controller(struct r8a66597 *r8a66597)
573 {
574 u16 vif = r8a66597->pdata->vif ? LDRV : 0;
575 u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
576 u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
577
578 if (r8a66597->pdata->on_chip) {
579 r8a66597_bset(r8a66597, 0x04, SYSCFG1);
580 r8a66597_bset(r8a66597, HSE, SYSCFG0);
581
582 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
583 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
584 r8a66597_bset(r8a66597, USBE, SYSCFG0);
585
586 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
587
588 r8a66597_bset(r8a66597, irq_sense, INTENB1);
589 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
590 DMA0CFG);
591 } else {
592 r8a66597_bset(r8a66597, vif | endian, PINCFG);
593 r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
594 r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
595 XTAL, SYSCFG0);
596
597 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
598 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
599 r8a66597_bset(r8a66597, USBE, SYSCFG0);
600
601 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
602
603 msleep(3);
604
605 r8a66597_bset(r8a66597, PLLC, SYSCFG0);
606
607 msleep(1);
608
609 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
610
611 r8a66597_bset(r8a66597, irq_sense, INTENB1);
612 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
613 DMA0CFG);
614 }
615 }
616
617 static void disable_controller(struct r8a66597 *r8a66597)
618 {
619 if (r8a66597->pdata->on_chip) {
620 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
621
622 /* disable interrupts */
623 r8a66597_write(r8a66597, 0, INTENB0);
624 r8a66597_write(r8a66597, 0, INTENB1);
625 r8a66597_write(r8a66597, 0, BRDYENB);
626 r8a66597_write(r8a66597, 0, BEMPENB);
627 r8a66597_write(r8a66597, 0, NRDYENB);
628
629 /* clear status */
630 r8a66597_write(r8a66597, 0, BRDYSTS);
631 r8a66597_write(r8a66597, 0, NRDYSTS);
632 r8a66597_write(r8a66597, 0, BEMPSTS);
633
634 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
635 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
636
637 } else {
638 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
639 udelay(1);
640 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
641 udelay(1);
642 udelay(1);
643 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
644 }
645 }
646
647 static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
648 {
649 u16 tmp;
650
651 if (!r8a66597->pdata->on_chip) {
652 tmp = r8a66597_read(r8a66597, SYSCFG0);
653 if (!(tmp & XCKE))
654 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
655 }
656 }
657
658 static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
659 {
660 return list_entry(ep->queue.next, struct r8a66597_request, queue);
661 }
662
663 /*-------------------------------------------------------------------------*/
664 static void transfer_complete(struct r8a66597_ep *ep,
665 struct r8a66597_request *req, int status)
666 __releases(r8a66597->lock)
667 __acquires(r8a66597->lock)
668 {
669 int restart = 0;
670
671 if (unlikely(ep->pipenum == 0)) {
672 if (ep->internal_ccpl) {
673 ep->internal_ccpl = 0;
674 return;
675 }
676 }
677
678 list_del_init(&req->queue);
679 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
680 req->req.status = -ESHUTDOWN;
681 else
682 req->req.status = status;
683
684 if (!list_empty(&ep->queue))
685 restart = 1;
686
687 spin_unlock(&ep->r8a66597->lock);
688 req->req.complete(&ep->ep, &req->req);
689 spin_lock(&ep->r8a66597->lock);
690
691 if (restart) {
692 req = get_request_from_ep(ep);
693 if (ep->desc)
694 start_packet(ep, req);
695 }
696 }
697
698 static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
699 {
700 int i;
701 u16 tmp;
702 unsigned bufsize;
703 size_t size;
704 void *buf;
705 u16 pipenum = ep->pipenum;
706 struct r8a66597 *r8a66597 = ep->r8a66597;
707
708 pipe_change(r8a66597, pipenum);
709 r8a66597_bset(r8a66597, ISEL, ep->fifosel);
710
711 i = 0;
712 do {
713 tmp = r8a66597_read(r8a66597, ep->fifoctr);
714 if (i++ > 100000) {
715 printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus"
716 "conflict. please power off this controller.");
717 return;
718 }
719 ndelay(1);
720 } while ((tmp & FRDY) == 0);
721
722 /* prepare parameters */
723 bufsize = get_buffer_size(r8a66597, pipenum);
724 buf = req->req.buf + req->req.actual;
725 size = min(bufsize, req->req.length - req->req.actual);
726
727 /* write fifo */
728 if (req->req.buf) {
729 if (size > 0)
730 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
731 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
732 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
733 }
734
735 /* update parameters */
736 req->req.actual += size;
737
738 /* check transfer finish */
739 if ((!req->req.zero && (req->req.actual == req->req.length))
740 || (size % ep->ep.maxpacket)
741 || (size == 0)) {
742 disable_irq_ready(r8a66597, pipenum);
743 disable_irq_empty(r8a66597, pipenum);
744 } else {
745 disable_irq_ready(r8a66597, pipenum);
746 enable_irq_empty(r8a66597, pipenum);
747 }
748 pipe_start(r8a66597, pipenum);
749 }
750
751 static void irq_packet_write(struct r8a66597_ep *ep,
752 struct r8a66597_request *req)
753 {
754 u16 tmp;
755 unsigned bufsize;
756 size_t size;
757 void *buf;
758 u16 pipenum = ep->pipenum;
759 struct r8a66597 *r8a66597 = ep->r8a66597;
760
761 pipe_change(r8a66597, pipenum);
762 tmp = r8a66597_read(r8a66597, ep->fifoctr);
763 if (unlikely((tmp & FRDY) == 0)) {
764 pipe_stop(r8a66597, pipenum);
765 pipe_irq_disable(r8a66597, pipenum);
766 printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
767 return;
768 }
769
770 /* prepare parameters */
771 bufsize = get_buffer_size(r8a66597, pipenum);
772 buf = req->req.buf + req->req.actual;
773 size = min(bufsize, req->req.length - req->req.actual);
774
775 /* write fifo */
776 if (req->req.buf) {
777 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
778 if ((size == 0)
779 || ((size % ep->ep.maxpacket) != 0)
780 || ((bufsize != ep->ep.maxpacket)
781 && (bufsize > size)))
782 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
783 }
784
785 /* update parameters */
786 req->req.actual += size;
787 /* check transfer finish */
788 if ((!req->req.zero && (req->req.actual == req->req.length))
789 || (size % ep->ep.maxpacket)
790 || (size == 0)) {
791 disable_irq_ready(r8a66597, pipenum);
792 enable_irq_empty(r8a66597, pipenum);
793 } else {
794 disable_irq_empty(r8a66597, pipenum);
795 pipe_irq_enable(r8a66597, pipenum);
796 }
797 }
798
799 static void irq_packet_read(struct r8a66597_ep *ep,
800 struct r8a66597_request *req)
801 {
802 u16 tmp;
803 int rcv_len, bufsize, req_len;
804 int size;
805 void *buf;
806 u16 pipenum = ep->pipenum;
807 struct r8a66597 *r8a66597 = ep->r8a66597;
808 int finish = 0;
809
810 pipe_change(r8a66597, pipenum);
811 tmp = r8a66597_read(r8a66597, ep->fifoctr);
812 if (unlikely((tmp & FRDY) == 0)) {
813 req->req.status = -EPIPE;
814 pipe_stop(r8a66597, pipenum);
815 pipe_irq_disable(r8a66597, pipenum);
816 printk(KERN_ERR "read fifo not ready");
817 return;
818 }
819
820 /* prepare parameters */
821 rcv_len = tmp & DTLN;
822 bufsize = get_buffer_size(r8a66597, pipenum);
823
824 buf = req->req.buf + req->req.actual;
825 req_len = req->req.length - req->req.actual;
826 if (rcv_len < bufsize)
827 size = min(rcv_len, req_len);
828 else
829 size = min(bufsize, req_len);
830
831 /* update parameters */
832 req->req.actual += size;
833
834 /* check transfer finish */
835 if ((!req->req.zero && (req->req.actual == req->req.length))
836 || (size % ep->ep.maxpacket)
837 || (size == 0)) {
838 pipe_stop(r8a66597, pipenum);
839 pipe_irq_disable(r8a66597, pipenum);
840 finish = 1;
841 }
842
843 /* read fifo */
844 if (req->req.buf) {
845 if (size == 0)
846 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
847 else
848 r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
849
850 }
851
852 if ((ep->pipenum != 0) && finish)
853 transfer_complete(ep, req, 0);
854 }
855
856 static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
857 {
858 u16 check;
859 u16 pipenum;
860 struct r8a66597_ep *ep;
861 struct r8a66597_request *req;
862
863 if ((status & BRDY0) && (enb & BRDY0)) {
864 r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
865 r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
866
867 ep = &r8a66597->ep[0];
868 req = get_request_from_ep(ep);
869 irq_packet_read(ep, req);
870 } else {
871 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
872 check = 1 << pipenum;
873 if ((status & check) && (enb & check)) {
874 r8a66597_write(r8a66597, ~check, BRDYSTS);
875 ep = r8a66597->pipenum2ep[pipenum];
876 req = get_request_from_ep(ep);
877 if (ep->desc->bEndpointAddress & USB_DIR_IN)
878 irq_packet_write(ep, req);
879 else
880 irq_packet_read(ep, req);
881 }
882 }
883 }
884 }
885
886 static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
887 {
888 u16 tmp;
889 u16 check;
890 u16 pipenum;
891 struct r8a66597_ep *ep;
892 struct r8a66597_request *req;
893
894 if ((status & BEMP0) && (enb & BEMP0)) {
895 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
896
897 ep = &r8a66597->ep[0];
898 req = get_request_from_ep(ep);
899 irq_ep0_write(ep, req);
900 } else {
901 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
902 check = 1 << pipenum;
903 if ((status & check) && (enb & check)) {
904 r8a66597_write(r8a66597, ~check, BEMPSTS);
905 tmp = control_reg_get(r8a66597, pipenum);
906 if ((tmp & INBUFM) == 0) {
907 disable_irq_empty(r8a66597, pipenum);
908 pipe_irq_disable(r8a66597, pipenum);
909 pipe_stop(r8a66597, pipenum);
910 ep = r8a66597->pipenum2ep[pipenum];
911 req = get_request_from_ep(ep);
912 if (!list_empty(&ep->queue))
913 transfer_complete(ep, req, 0);
914 }
915 }
916 }
917 }
918 }
919
920 static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
921 __releases(r8a66597->lock)
922 __acquires(r8a66597->lock)
923 {
924 struct r8a66597_ep *ep;
925 u16 pid;
926 u16 status = 0;
927 u16 w_index = le16_to_cpu(ctrl->wIndex);
928
929 switch (ctrl->bRequestType & USB_RECIP_MASK) {
930 case USB_RECIP_DEVICE:
931 status = 1 << USB_DEVICE_SELF_POWERED;
932 break;
933 case USB_RECIP_INTERFACE:
934 status = 0;
935 break;
936 case USB_RECIP_ENDPOINT:
937 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
938 pid = control_reg_get_pid(r8a66597, ep->pipenum);
939 if (pid == PID_STALL)
940 status = 1 << USB_ENDPOINT_HALT;
941 else
942 status = 0;
943 break;
944 default:
945 pipe_stall(r8a66597, 0);
946 return; /* exit */
947 }
948
949 r8a66597->ep0_data = cpu_to_le16(status);
950 r8a66597->ep0_req->buf = &r8a66597->ep0_data;
951 r8a66597->ep0_req->length = 2;
952 /* AV: what happens if we get called again before that gets through? */
953 spin_unlock(&r8a66597->lock);
954 r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
955 spin_lock(&r8a66597->lock);
956 }
957
958 static void clear_feature(struct r8a66597 *r8a66597,
959 struct usb_ctrlrequest *ctrl)
960 {
961 switch (ctrl->bRequestType & USB_RECIP_MASK) {
962 case USB_RECIP_DEVICE:
963 control_end(r8a66597, 1);
964 break;
965 case USB_RECIP_INTERFACE:
966 control_end(r8a66597, 1);
967 break;
968 case USB_RECIP_ENDPOINT: {
969 struct r8a66597_ep *ep;
970 struct r8a66597_request *req;
971 u16 w_index = le16_to_cpu(ctrl->wIndex);
972
973 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
974 if (!ep->wedge) {
975 pipe_stop(r8a66597, ep->pipenum);
976 control_reg_sqclr(r8a66597, ep->pipenum);
977 spin_unlock(&r8a66597->lock);
978 usb_ep_clear_halt(&ep->ep);
979 spin_lock(&r8a66597->lock);
980 }
981
982 control_end(r8a66597, 1);
983
984 req = get_request_from_ep(ep);
985 if (ep->busy) {
986 ep->busy = 0;
987 if (list_empty(&ep->queue))
988 break;
989 start_packet(ep, req);
990 } else if (!list_empty(&ep->queue))
991 pipe_start(r8a66597, ep->pipenum);
992 }
993 break;
994 default:
995 pipe_stall(r8a66597, 0);
996 break;
997 }
998 }
999
1000 static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
1001 {
1002
1003 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1004 case USB_RECIP_DEVICE:
1005 control_end(r8a66597, 1);
1006 break;
1007 case USB_RECIP_INTERFACE:
1008 control_end(r8a66597, 1);
1009 break;
1010 case USB_RECIP_ENDPOINT: {
1011 struct r8a66597_ep *ep;
1012 u16 w_index = le16_to_cpu(ctrl->wIndex);
1013
1014 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1015 pipe_stall(r8a66597, ep->pipenum);
1016
1017 control_end(r8a66597, 1);
1018 }
1019 break;
1020 default:
1021 pipe_stall(r8a66597, 0);
1022 break;
1023 }
1024 }
1025
1026 /* if return value is true, call class driver's setup() */
1027 static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
1028 {
1029 u16 *p = (u16 *)ctrl;
1030 unsigned long offset = USBREQ;
1031 int i, ret = 0;
1032
1033 /* read fifo */
1034 r8a66597_write(r8a66597, ~VALID, INTSTS0);
1035
1036 for (i = 0; i < 4; i++)
1037 p[i] = r8a66597_read(r8a66597, offset + i*2);
1038
1039 /* check request */
1040 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1041 switch (ctrl->bRequest) {
1042 case USB_REQ_GET_STATUS:
1043 get_status(r8a66597, ctrl);
1044 break;
1045 case USB_REQ_CLEAR_FEATURE:
1046 clear_feature(r8a66597, ctrl);
1047 break;
1048 case USB_REQ_SET_FEATURE:
1049 set_feature(r8a66597, ctrl);
1050 break;
1051 default:
1052 ret = 1;
1053 break;
1054 }
1055 } else
1056 ret = 1;
1057 return ret;
1058 }
1059
1060 static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
1061 {
1062 u16 speed = get_usb_speed(r8a66597);
1063
1064 switch (speed) {
1065 case HSMODE:
1066 r8a66597->gadget.speed = USB_SPEED_HIGH;
1067 break;
1068 case FSMODE:
1069 r8a66597->gadget.speed = USB_SPEED_FULL;
1070 break;
1071 default:
1072 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
1073 printk(KERN_ERR "USB speed unknown\n");
1074 }
1075 }
1076
1077 static void irq_device_state(struct r8a66597 *r8a66597)
1078 {
1079 u16 dvsq;
1080
1081 dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
1082 r8a66597_write(r8a66597, ~DVST, INTSTS0);
1083
1084 if (dvsq == DS_DFLT) {
1085 /* bus reset */
1086 r8a66597->driver->disconnect(&r8a66597->gadget);
1087 r8a66597_update_usb_speed(r8a66597);
1088 }
1089 if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
1090 r8a66597_update_usb_speed(r8a66597);
1091 if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
1092 && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1093 r8a66597_update_usb_speed(r8a66597);
1094
1095 r8a66597->old_dvsq = dvsq;
1096 }
1097
1098 static void irq_control_stage(struct r8a66597 *r8a66597)
1099 __releases(r8a66597->lock)
1100 __acquires(r8a66597->lock)
1101 {
1102 struct usb_ctrlrequest ctrl;
1103 u16 ctsq;
1104
1105 ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
1106 r8a66597_write(r8a66597, ~CTRT, INTSTS0);
1107
1108 switch (ctsq) {
1109 case CS_IDST: {
1110 struct r8a66597_ep *ep;
1111 struct r8a66597_request *req;
1112 ep = &r8a66597->ep[0];
1113 req = get_request_from_ep(ep);
1114 transfer_complete(ep, req, 0);
1115 }
1116 break;
1117
1118 case CS_RDDS:
1119 case CS_WRDS:
1120 case CS_WRND:
1121 if (setup_packet(r8a66597, &ctrl)) {
1122 spin_unlock(&r8a66597->lock);
1123 if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
1124 < 0)
1125 pipe_stall(r8a66597, 0);
1126 spin_lock(&r8a66597->lock);
1127 }
1128 break;
1129 case CS_RDSS:
1130 case CS_WRSS:
1131 control_end(r8a66597, 0);
1132 break;
1133 default:
1134 printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1135 break;
1136 }
1137 }
1138
1139 static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
1140 {
1141 struct r8a66597 *r8a66597 = _r8a66597;
1142 u16 intsts0;
1143 u16 intenb0;
1144 u16 brdysts, nrdysts, bempsts;
1145 u16 brdyenb, nrdyenb, bempenb;
1146 u16 savepipe;
1147 u16 mask0;
1148
1149 spin_lock(&r8a66597->lock);
1150
1151 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1152 intenb0 = r8a66597_read(r8a66597, INTENB0);
1153
1154 savepipe = r8a66597_read(r8a66597, CFIFOSEL);
1155
1156 mask0 = intsts0 & intenb0;
1157 if (mask0) {
1158 brdysts = r8a66597_read(r8a66597, BRDYSTS);
1159 nrdysts = r8a66597_read(r8a66597, NRDYSTS);
1160 bempsts = r8a66597_read(r8a66597, BEMPSTS);
1161 brdyenb = r8a66597_read(r8a66597, BRDYENB);
1162 nrdyenb = r8a66597_read(r8a66597, NRDYENB);
1163 bempenb = r8a66597_read(r8a66597, BEMPENB);
1164
1165 if (mask0 & VBINT) {
1166 r8a66597_write(r8a66597, 0xffff & ~VBINT,
1167 INTSTS0);
1168 r8a66597_start_xclock(r8a66597);
1169
1170 /* start vbus sampling */
1171 r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
1172 & VBSTS;
1173 r8a66597->scount = R8A66597_MAX_SAMPLING;
1174
1175 mod_timer(&r8a66597->timer,
1176 jiffies + msecs_to_jiffies(50));
1177 }
1178 if (intsts0 & DVSQ)
1179 irq_device_state(r8a66597);
1180
1181 if ((intsts0 & BRDY) && (intenb0 & BRDYE)
1182 && (brdysts & brdyenb))
1183 irq_pipe_ready(r8a66597, brdysts, brdyenb);
1184 if ((intsts0 & BEMP) && (intenb0 & BEMPE)
1185 && (bempsts & bempenb))
1186 irq_pipe_empty(r8a66597, bempsts, bempenb);
1187
1188 if (intsts0 & CTRT)
1189 irq_control_stage(r8a66597);
1190 }
1191
1192 r8a66597_write(r8a66597, savepipe, CFIFOSEL);
1193
1194 spin_unlock(&r8a66597->lock);
1195 return IRQ_HANDLED;
1196 }
1197
1198 static void r8a66597_timer(unsigned long _r8a66597)
1199 {
1200 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1201 unsigned long flags;
1202 u16 tmp;
1203
1204 spin_lock_irqsave(&r8a66597->lock, flags);
1205 tmp = r8a66597_read(r8a66597, SYSCFG0);
1206 if (r8a66597->scount > 0) {
1207 tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
1208 if (tmp == r8a66597->old_vbus) {
1209 r8a66597->scount--;
1210 if (r8a66597->scount == 0) {
1211 if (tmp == VBSTS)
1212 r8a66597_usb_connect(r8a66597);
1213 else
1214 r8a66597_usb_disconnect(r8a66597);
1215 } else {
1216 mod_timer(&r8a66597->timer,
1217 jiffies + msecs_to_jiffies(50));
1218 }
1219 } else {
1220 r8a66597->scount = R8A66597_MAX_SAMPLING;
1221 r8a66597->old_vbus = tmp;
1222 mod_timer(&r8a66597->timer,
1223 jiffies + msecs_to_jiffies(50));
1224 }
1225 }
1226 spin_unlock_irqrestore(&r8a66597->lock, flags);
1227 }
1228
1229 /*-------------------------------------------------------------------------*/
1230 static int r8a66597_enable(struct usb_ep *_ep,
1231 const struct usb_endpoint_descriptor *desc)
1232 {
1233 struct r8a66597_ep *ep;
1234
1235 ep = container_of(_ep, struct r8a66597_ep, ep);
1236 return alloc_pipe_config(ep, desc);
1237 }
1238
1239 static int r8a66597_disable(struct usb_ep *_ep)
1240 {
1241 struct r8a66597_ep *ep;
1242 struct r8a66597_request *req;
1243 unsigned long flags;
1244
1245 ep = container_of(_ep, struct r8a66597_ep, ep);
1246 BUG_ON(!ep);
1247
1248 while (!list_empty(&ep->queue)) {
1249 req = get_request_from_ep(ep);
1250 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1251 transfer_complete(ep, req, -ECONNRESET);
1252 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1253 }
1254
1255 pipe_irq_disable(ep->r8a66597, ep->pipenum);
1256 return free_pipe_config(ep);
1257 }
1258
1259 static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
1260 gfp_t gfp_flags)
1261 {
1262 struct r8a66597_request *req;
1263
1264 req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
1265 if (!req)
1266 return NULL;
1267
1268 INIT_LIST_HEAD(&req->queue);
1269
1270 return &req->req;
1271 }
1272
1273 static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
1274 {
1275 struct r8a66597_request *req;
1276
1277 req = container_of(_req, struct r8a66597_request, req);
1278 kfree(req);
1279 }
1280
1281 static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
1282 gfp_t gfp_flags)
1283 {
1284 struct r8a66597_ep *ep;
1285 struct r8a66597_request *req;
1286 unsigned long flags;
1287 int request = 0;
1288
1289 ep = container_of(_ep, struct r8a66597_ep, ep);
1290 req = container_of(_req, struct r8a66597_request, req);
1291
1292 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1293 return -ESHUTDOWN;
1294
1295 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1296
1297 if (list_empty(&ep->queue))
1298 request = 1;
1299
1300 list_add_tail(&req->queue, &ep->queue);
1301 req->req.actual = 0;
1302 req->req.status = -EINPROGRESS;
1303
1304 if (ep->desc == NULL) /* control */
1305 start_ep0(ep, req);
1306 else {
1307 if (request && !ep->busy)
1308 start_packet(ep, req);
1309 }
1310
1311 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1312
1313 return 0;
1314 }
1315
1316 static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1317 {
1318 struct r8a66597_ep *ep;
1319 struct r8a66597_request *req;
1320 unsigned long flags;
1321
1322 ep = container_of(_ep, struct r8a66597_ep, ep);
1323 req = container_of(_req, struct r8a66597_request, req);
1324
1325 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1326 if (!list_empty(&ep->queue))
1327 transfer_complete(ep, req, -ECONNRESET);
1328 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1329
1330 return 0;
1331 }
1332
1333 static int r8a66597_set_halt(struct usb_ep *_ep, int value)
1334 {
1335 struct r8a66597_ep *ep;
1336 struct r8a66597_request *req;
1337 unsigned long flags;
1338 int ret = 0;
1339
1340 ep = container_of(_ep, struct r8a66597_ep, ep);
1341 req = get_request_from_ep(ep);
1342
1343 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1344 if (!list_empty(&ep->queue)) {
1345 ret = -EAGAIN;
1346 goto out;
1347 }
1348 if (value) {
1349 ep->busy = 1;
1350 pipe_stall(ep->r8a66597, ep->pipenum);
1351 } else {
1352 ep->busy = 0;
1353 ep->wedge = 0;
1354 pipe_stop(ep->r8a66597, ep->pipenum);
1355 }
1356
1357 out:
1358 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1359 return ret;
1360 }
1361
1362 static int r8a66597_set_wedge(struct usb_ep *_ep)
1363 {
1364 struct r8a66597_ep *ep;
1365 unsigned long flags;
1366
1367 ep = container_of(_ep, struct r8a66597_ep, ep);
1368
1369 if (!ep || !ep->desc)
1370 return -EINVAL;
1371
1372 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1373 ep->wedge = 1;
1374 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1375
1376 return usb_ep_set_halt(_ep);
1377 }
1378
1379 static void r8a66597_fifo_flush(struct usb_ep *_ep)
1380 {
1381 struct r8a66597_ep *ep;
1382 unsigned long flags;
1383
1384 ep = container_of(_ep, struct r8a66597_ep, ep);
1385 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1386 if (list_empty(&ep->queue) && !ep->busy) {
1387 pipe_stop(ep->r8a66597, ep->pipenum);
1388 r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
1389 }
1390 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1391 }
1392
1393 static struct usb_ep_ops r8a66597_ep_ops = {
1394 .enable = r8a66597_enable,
1395 .disable = r8a66597_disable,
1396
1397 .alloc_request = r8a66597_alloc_request,
1398 .free_request = r8a66597_free_request,
1399
1400 .queue = r8a66597_queue,
1401 .dequeue = r8a66597_dequeue,
1402
1403 .set_halt = r8a66597_set_halt,
1404 .set_wedge = r8a66597_set_wedge,
1405 .fifo_flush = r8a66597_fifo_flush,
1406 };
1407
1408 /*-------------------------------------------------------------------------*/
1409 static struct r8a66597 *the_controller;
1410
1411 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1412 int (*bind)(struct usb_gadget *))
1413 {
1414 struct r8a66597 *r8a66597 = the_controller;
1415 int retval;
1416
1417 if (!driver
1418 || driver->speed != USB_SPEED_HIGH
1419 || !bind
1420 || !driver->setup)
1421 return -EINVAL;
1422 if (!r8a66597)
1423 return -ENODEV;
1424 if (r8a66597->driver)
1425 return -EBUSY;
1426
1427 /* hook up the driver */
1428 driver->driver.bus = NULL;
1429 r8a66597->driver = driver;
1430 r8a66597->gadget.dev.driver = &driver->driver;
1431
1432 retval = device_add(&r8a66597->gadget.dev);
1433 if (retval) {
1434 printk(KERN_ERR "device_add error (%d)\n", retval);
1435 goto error;
1436 }
1437
1438 retval = bind(&r8a66597->gadget);
1439 if (retval) {
1440 printk(KERN_ERR "bind to driver error (%d)\n", retval);
1441 device_del(&r8a66597->gadget.dev);
1442 goto error;
1443 }
1444
1445 r8a66597_bset(r8a66597, VBSE, INTENB0);
1446 if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
1447 r8a66597_start_xclock(r8a66597);
1448 /* start vbus sampling */
1449 r8a66597->old_vbus = r8a66597_read(r8a66597,
1450 INTSTS0) & VBSTS;
1451 r8a66597->scount = R8A66597_MAX_SAMPLING;
1452 mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
1453 }
1454
1455 return 0;
1456
1457 error:
1458 r8a66597->driver = NULL;
1459 r8a66597->gadget.dev.driver = NULL;
1460
1461 return retval;
1462 }
1463 EXPORT_SYMBOL(usb_gadget_probe_driver);
1464
1465 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1466 {
1467 struct r8a66597 *r8a66597 = the_controller;
1468 unsigned long flags;
1469
1470 if (driver != r8a66597->driver || !driver->unbind)
1471 return -EINVAL;
1472
1473 spin_lock_irqsave(&r8a66597->lock, flags);
1474 if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
1475 r8a66597_usb_disconnect(r8a66597);
1476 spin_unlock_irqrestore(&r8a66597->lock, flags);
1477
1478 r8a66597_bclr(r8a66597, VBSE, INTENB0);
1479
1480 driver->unbind(&r8a66597->gadget);
1481
1482 init_controller(r8a66597);
1483 disable_controller(r8a66597);
1484
1485 device_del(&r8a66597->gadget.dev);
1486 r8a66597->driver = NULL;
1487 return 0;
1488 }
1489 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1490
1491 /*-------------------------------------------------------------------------*/
1492 static int r8a66597_get_frame(struct usb_gadget *_gadget)
1493 {
1494 struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
1495 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1496 }
1497
1498 static struct usb_gadget_ops r8a66597_gadget_ops = {
1499 .get_frame = r8a66597_get_frame,
1500 };
1501
1502 static int __exit r8a66597_remove(struct platform_device *pdev)
1503 {
1504 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
1505
1506 del_timer_sync(&r8a66597->timer);
1507 iounmap(r8a66597->reg);
1508 free_irq(platform_get_irq(pdev, 0), r8a66597);
1509 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
1510 #ifdef CONFIG_HAVE_CLK
1511 if (r8a66597->pdata->on_chip) {
1512 clk_disable(r8a66597->clk);
1513 clk_put(r8a66597->clk);
1514 }
1515 #endif
1516 kfree(r8a66597);
1517 return 0;
1518 }
1519
1520 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1521 {
1522 }
1523
1524 static int __init r8a66597_probe(struct platform_device *pdev)
1525 {
1526 #ifdef CONFIG_HAVE_CLK
1527 char clk_name[8];
1528 #endif
1529 struct resource *res, *ires;
1530 int irq;
1531 void __iomem *reg = NULL;
1532 struct r8a66597 *r8a66597 = NULL;
1533 int ret = 0;
1534 int i;
1535 unsigned long irq_trigger;
1536
1537 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1538 if (!res) {
1539 ret = -ENODEV;
1540 printk(KERN_ERR "platform_get_resource error.\n");
1541 goto clean_up;
1542 }
1543
1544 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1545 irq = ires->start;
1546 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1547
1548 if (irq < 0) {
1549 ret = -ENODEV;
1550 printk(KERN_ERR "platform_get_irq error.\n");
1551 goto clean_up;
1552 }
1553
1554 reg = ioremap(res->start, resource_size(res));
1555 if (reg == NULL) {
1556 ret = -ENOMEM;
1557 printk(KERN_ERR "ioremap error.\n");
1558 goto clean_up;
1559 }
1560
1561 /* initialize ucd */
1562 r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
1563 if (r8a66597 == NULL) {
1564 ret = -ENOMEM;
1565 printk(KERN_ERR "kzalloc error\n");
1566 goto clean_up;
1567 }
1568
1569 spin_lock_init(&r8a66597->lock);
1570 dev_set_drvdata(&pdev->dev, r8a66597);
1571 r8a66597->pdata = pdev->dev.platform_data;
1572 r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
1573
1574 r8a66597->gadget.ops = &r8a66597_gadget_ops;
1575 device_initialize(&r8a66597->gadget.dev);
1576 dev_set_name(&r8a66597->gadget.dev, "gadget");
1577 r8a66597->gadget.is_dualspeed = 1;
1578 r8a66597->gadget.dev.parent = &pdev->dev;
1579 r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
1580 r8a66597->gadget.dev.release = pdev->dev.release;
1581 r8a66597->gadget.name = udc_name;
1582
1583 init_timer(&r8a66597->timer);
1584 r8a66597->timer.function = r8a66597_timer;
1585 r8a66597->timer.data = (unsigned long)r8a66597;
1586 r8a66597->reg = reg;
1587
1588 #ifdef CONFIG_HAVE_CLK
1589 if (r8a66597->pdata->on_chip) {
1590 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
1591 r8a66597->clk = clk_get(&pdev->dev, clk_name);
1592 if (IS_ERR(r8a66597->clk)) {
1593 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1594 clk_name);
1595 ret = PTR_ERR(r8a66597->clk);
1596 goto clean_up;
1597 }
1598 clk_enable(r8a66597->clk);
1599 }
1600 #endif
1601
1602 disable_controller(r8a66597); /* make sure controller is disabled */
1603
1604 ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
1605 udc_name, r8a66597);
1606 if (ret < 0) {
1607 printk(KERN_ERR "request_irq error (%d)\n", ret);
1608 goto clean_up2;
1609 }
1610
1611 INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
1612 r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
1613 INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
1614 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
1615 struct r8a66597_ep *ep = &r8a66597->ep[i];
1616
1617 if (i != 0) {
1618 INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
1619 list_add_tail(&r8a66597->ep[i].ep.ep_list,
1620 &r8a66597->gadget.ep_list);
1621 }
1622 ep->r8a66597 = r8a66597;
1623 INIT_LIST_HEAD(&ep->queue);
1624 ep->ep.name = r8a66597_ep_name[i];
1625 ep->ep.ops = &r8a66597_ep_ops;
1626 ep->ep.maxpacket = 512;
1627 }
1628 r8a66597->ep[0].ep.maxpacket = 64;
1629 r8a66597->ep[0].pipenum = 0;
1630 r8a66597->ep[0].fifoaddr = CFIFO;
1631 r8a66597->ep[0].fifosel = CFIFOSEL;
1632 r8a66597->ep[0].fifoctr = CFIFOCTR;
1633 r8a66597->ep[0].fifotrn = 0;
1634 r8a66597->ep[0].pipectr = get_pipectr_addr(0);
1635 r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
1636 r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
1637
1638 the_controller = r8a66597;
1639
1640 r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
1641 GFP_KERNEL);
1642 if (r8a66597->ep0_req == NULL)
1643 goto clean_up3;
1644 r8a66597->ep0_req->complete = nop_completion;
1645
1646 init_controller(r8a66597);
1647
1648 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1649 return 0;
1650
1651 clean_up3:
1652 free_irq(irq, r8a66597);
1653 clean_up2:
1654 #ifdef CONFIG_HAVE_CLK
1655 if (r8a66597->pdata->on_chip) {
1656 clk_disable(r8a66597->clk);
1657 clk_put(r8a66597->clk);
1658 }
1659 #endif
1660 clean_up:
1661 if (r8a66597) {
1662 if (r8a66597->ep0_req)
1663 r8a66597_free_request(&r8a66597->ep[0].ep,
1664 r8a66597->ep0_req);
1665 kfree(r8a66597);
1666 }
1667 if (reg)
1668 iounmap(reg);
1669
1670 return ret;
1671 }
1672
1673 /*-------------------------------------------------------------------------*/
1674 static struct platform_driver r8a66597_driver = {
1675 .remove = __exit_p(r8a66597_remove),
1676 .driver = {
1677 .name = (char *) udc_name,
1678 },
1679 };
1680
1681 static int __init r8a66597_udc_init(void)
1682 {
1683 return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
1684 }
1685 module_init(r8a66597_udc_init);
1686
1687 static void __exit r8a66597_udc_cleanup(void)
1688 {
1689 platform_driver_unregister(&r8a66597_driver);
1690 }
1691 module_exit(r8a66597_udc_cleanup);
1692
1693 MODULE_DESCRIPTION("R8A66597 USB gadget driver");
1694 MODULE_LICENSE("GPL");
1695 MODULE_AUTHOR("Yoshihiro Shimoda");
1696
linux-next