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hugetlb: move refcounting in hugepage allocation inside hugetlb_lock
[linux/fpc-iii.git] / drivers / usb / gadget / r8a66597-udc.c
blob2456ccd9965e3432ab4fd32a33052c104e725698
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 disable_controller(struct r8a66597 *r8a66597);
46 static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
47 static void irq_packet_write(struct r8a66597_ep *ep,
48 struct r8a66597_request *req);
49 static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
50 gfp_t gfp_flags);
51
52 static void transfer_complete(struct r8a66597_ep *ep,
53 struct r8a66597_request *req, int status);
54
55 /*-------------------------------------------------------------------------*/
56 static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
57 {
58 return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
59 }
60
61 static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
62 unsigned long reg)
63 {
64 u16 tmp;
65
66 tmp = r8a66597_read(r8a66597, INTENB0);
67 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
68 INTENB0);
69 r8a66597_bset(r8a66597, (1 << pipenum), reg);
70 r8a66597_write(r8a66597, tmp, INTENB0);
71 }
72
73 static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
74 unsigned long reg)
75 {
76 u16 tmp;
77
78 tmp = r8a66597_read(r8a66597, INTENB0);
79 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
80 INTENB0);
81 r8a66597_bclr(r8a66597, (1 << pipenum), reg);
82 r8a66597_write(r8a66597, tmp, INTENB0);
83 }
84
85 static void r8a66597_usb_connect(struct r8a66597 *r8a66597)
86 {
87 r8a66597_bset(r8a66597, CTRE, INTENB0);
88 r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
89
90 r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
91 }
92
93 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
94 __releases(r8a66597->lock)
95 __acquires(r8a66597->lock)
96 {
97 r8a66597_bclr(r8a66597, CTRE, INTENB0);
98 r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
99 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
100
101 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
102 spin_unlock(&r8a66597->lock);
103 r8a66597->driver->disconnect(&r8a66597->gadget);
104 spin_lock(&r8a66597->lock);
105
106 disable_controller(r8a66597);
107 INIT_LIST_HEAD(&r8a66597->ep[0].queue);
108 }
109
110 static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
111 {
112 u16 pid = 0;
113 unsigned long offset;
114
115 if (pipenum == 0)
116 pid = r8a66597_read(r8a66597, DCPCTR) & PID;
117 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
118 offset = get_pipectr_addr(pipenum);
119 pid = r8a66597_read(r8a66597, offset) & PID;
120 } else
121 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
122
123 return pid;
124 }
125
126 static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
127 u16 pid)
128 {
129 unsigned long offset;
130
131 if (pipenum == 0)
132 r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
133 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
134 offset = get_pipectr_addr(pipenum);
135 r8a66597_mdfy(r8a66597, pid, PID, offset);
136 } else
137 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
138 }
139
140 static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
141 {
142 control_reg_set_pid(r8a66597, pipenum, PID_BUF);
143 }
144
145 static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
146 {
147 control_reg_set_pid(r8a66597, pipenum, PID_NAK);
148 }
149
150 static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
151 {
152 control_reg_set_pid(r8a66597, pipenum, PID_STALL);
153 }
154
155 static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
156 {
157 u16 ret = 0;
158 unsigned long offset;
159
160 if (pipenum == 0)
161 ret = r8a66597_read(r8a66597, DCPCTR);
162 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
163 offset = get_pipectr_addr(pipenum);
164 ret = r8a66597_read(r8a66597, offset);
165 } else
166 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
167
168 return ret;
169 }
170
171 static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
172 {
173 unsigned long offset;
174
175 pipe_stop(r8a66597, pipenum);
176
177 if (pipenum == 0)
178 r8a66597_bset(r8a66597, SQCLR, DCPCTR);
179 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
180 offset = get_pipectr_addr(pipenum);
181 r8a66597_bset(r8a66597, SQCLR, offset);
182 } else
183 printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
184 }
185
186 static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
187 {
188 u16 tmp;
189 int size;
190
191 if (pipenum == 0) {
192 tmp = r8a66597_read(r8a66597, DCPCFG);
193 if ((tmp & R8A66597_CNTMD) != 0)
194 size = 256;
195 else {
196 tmp = r8a66597_read(r8a66597, DCPMAXP);
197 size = tmp & MAXP;
198 }
199 } else {
200 r8a66597_write(r8a66597, pipenum, PIPESEL);
201 tmp = r8a66597_read(r8a66597, PIPECFG);
202 if ((tmp & R8A66597_CNTMD) != 0) {
203 tmp = r8a66597_read(r8a66597, PIPEBUF);
204 size = ((tmp >> 10) + 1) * 64;
205 } else {
206 tmp = r8a66597_read(r8a66597, PIPEMAXP);
207 size = tmp & MXPS;
208 }
209 }
210
211 return size;
212 }
213
214 static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
215 {
216 if (r8a66597->pdata->on_chip)
217 return MBW_32;
218 else
219 return MBW_16;
220 }
221
222 static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
223 {
224 struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
225
226 if (ep->use_dma)
227 return;
228
229 r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
230
231 ndelay(450);
232
233 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
234 }
235
236 static int pipe_buffer_setting(struct r8a66597 *r8a66597,
237 struct r8a66597_pipe_info *info)
238 {
239 u16 bufnum = 0, buf_bsize = 0;
240 u16 pipecfg = 0;
241
242 if (info->pipe == 0)
243 return -EINVAL;
244
245 r8a66597_write(r8a66597, info->pipe, PIPESEL);
246
247 if (info->dir_in)
248 pipecfg |= R8A66597_DIR;
249 pipecfg |= info->type;
250 pipecfg |= info->epnum;
251 switch (info->type) {
252 case R8A66597_INT:
253 bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
254 buf_bsize = 0;
255 break;
256 case R8A66597_BULK:
257 /* isochronous pipes may be used as bulk pipes */
258 if (info->pipe > R8A66597_BASE_PIPENUM_BULK)
259 bufnum = info->pipe - R8A66597_BASE_PIPENUM_BULK;
260 else
261 bufnum = info->pipe - R8A66597_BASE_PIPENUM_ISOC;
262
263 bufnum = R8A66597_BASE_BUFNUM + (bufnum * 16);
264 buf_bsize = 7;
265 pipecfg |= R8A66597_DBLB;
266 if (!info->dir_in)
267 pipecfg |= R8A66597_SHTNAK;
268 break;
269 case R8A66597_ISO:
270 bufnum = R8A66597_BASE_BUFNUM +
271 (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
272 buf_bsize = 7;
273 break;
274 }
275
276 if (buf_bsize && ((bufnum + 16) >= R8A66597_MAX_BUFNUM)) {
277 pr_err(KERN_ERR "r8a66597 pipe memory is insufficient\n");
278 return -ENOMEM;
279 }
280
281 r8a66597_write(r8a66597, pipecfg, PIPECFG);
282 r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
283 r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
284 if (info->interval)
285 info->interval--;
286 r8a66597_write(r8a66597, info->interval, PIPEPERI);
287
288 return 0;
289 }
290
291 static void pipe_buffer_release(struct r8a66597 *r8a66597,
292 struct r8a66597_pipe_info *info)
293 {
294 if (info->pipe == 0)
295 return;
296
297 if (is_bulk_pipe(info->pipe))
298 r8a66597->bulk--;
299 else if (is_interrupt_pipe(info->pipe))
300 r8a66597->interrupt--;
301 else if (is_isoc_pipe(info->pipe)) {
302 r8a66597->isochronous--;
303 if (info->type == R8A66597_BULK)
304 r8a66597->bulk--;
305 } else
306 printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
307 info->pipe);
308 }
309
310 static void pipe_initialize(struct r8a66597_ep *ep)
311 {
312 struct r8a66597 *r8a66597 = ep->r8a66597;
313
314 r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
315
316 r8a66597_write(r8a66597, ACLRM, ep->pipectr);
317 r8a66597_write(r8a66597, 0, ep->pipectr);
318 r8a66597_write(r8a66597, SQCLR, ep->pipectr);
319 if (ep->use_dma) {
320 r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
321
322 ndelay(450);
323
324 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
325 }
326 }
327
328 static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
329 struct r8a66597_ep *ep,
330 const struct usb_endpoint_descriptor *desc,
331 u16 pipenum, int dma)
332 {
333 ep->use_dma = 0;
334 ep->fifoaddr = CFIFO;
335 ep->fifosel = CFIFOSEL;
336 ep->fifoctr = CFIFOCTR;
337 ep->fifotrn = 0;
338
339 ep->pipectr = get_pipectr_addr(pipenum);
340 ep->pipenum = pipenum;
341 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
342 r8a66597->pipenum2ep[pipenum] = ep;
343 r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
344 = ep;
345 INIT_LIST_HEAD(&ep->queue);
346 }
347
348 static void r8a66597_ep_release(struct r8a66597_ep *ep)
349 {
350 struct r8a66597 *r8a66597 = ep->r8a66597;
351 u16 pipenum = ep->pipenum;
352
353 if (pipenum == 0)
354 return;
355
356 if (ep->use_dma)
357 r8a66597->num_dma--;
358 ep->pipenum = 0;
359 ep->busy = 0;
360 ep->use_dma = 0;
361 }
362
363 static int alloc_pipe_config(struct r8a66597_ep *ep,
364 const struct usb_endpoint_descriptor *desc)
365 {
366 struct r8a66597 *r8a66597 = ep->r8a66597;
367 struct r8a66597_pipe_info info;
368 int dma = 0;
369 unsigned char *counter;
370 int ret;
371
372 ep->desc = desc;
373
374 if (ep->pipenum) /* already allocated pipe */
375 return 0;
376
377 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
378 case USB_ENDPOINT_XFER_BULK:
379 if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
380 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
381 printk(KERN_ERR "bulk pipe is insufficient\n");
382 return -ENODEV;
383 } else {
384 info.pipe = R8A66597_BASE_PIPENUM_ISOC
385 + r8a66597->isochronous;
386 counter = &r8a66597->isochronous;
387 }
388 } else {
389 info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
390 counter = &r8a66597->bulk;
391 }
392 info.type = R8A66597_BULK;
393 dma = 1;
394 break;
395 case USB_ENDPOINT_XFER_INT:
396 if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
397 printk(KERN_ERR "interrupt pipe is insufficient\n");
398 return -ENODEV;
399 }
400 info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
401 info.type = R8A66597_INT;
402 counter = &r8a66597->interrupt;
403 break;
404 case USB_ENDPOINT_XFER_ISOC:
405 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
406 printk(KERN_ERR "isochronous pipe is insufficient\n");
407 return -ENODEV;
408 }
409 info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
410 info.type = R8A66597_ISO;
411 counter = &r8a66597->isochronous;
412 break;
413 default:
414 printk(KERN_ERR "unexpect xfer type\n");
415 return -EINVAL;
416 }
417 ep->type = info.type;
418
419 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
420 info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
421 info.interval = desc->bInterval;
422 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
423 info.dir_in = 1;
424 else
425 info.dir_in = 0;
426
427 ret = pipe_buffer_setting(r8a66597, &info);
428 if (ret < 0) {
429 printk(KERN_ERR "pipe_buffer_setting fail\n");
430 return ret;
431 }
432
433 (*counter)++;
434 if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
435 r8a66597->bulk++;
436
437 r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
438 pipe_initialize(ep);
439
440 return 0;
441 }
442
443 static int free_pipe_config(struct r8a66597_ep *ep)
444 {
445 struct r8a66597 *r8a66597 = ep->r8a66597;
446 struct r8a66597_pipe_info info;
447
448 info.pipe = ep->pipenum;
449 info.type = ep->type;
450 pipe_buffer_release(r8a66597, &info);
451 r8a66597_ep_release(ep);
452
453 return 0;
454 }
455
456 /*-------------------------------------------------------------------------*/
457 static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
458 {
459 enable_irq_ready(r8a66597, pipenum);
460 enable_irq_nrdy(r8a66597, pipenum);
461 }
462
463 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
464 {
465 disable_irq_ready(r8a66597, pipenum);
466 disable_irq_nrdy(r8a66597, pipenum);
467 }
468
469 /* if complete is true, gadget driver complete function is not call */
470 static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
471 {
472 r8a66597->ep[0].internal_ccpl = ccpl;
473 pipe_start(r8a66597, 0);
474 r8a66597_bset(r8a66597, CCPL, DCPCTR);
475 }
476
477 static void start_ep0_write(struct r8a66597_ep *ep,
478 struct r8a66597_request *req)
479 {
480 struct r8a66597 *r8a66597 = ep->r8a66597;
481
482 pipe_change(r8a66597, ep->pipenum);
483 r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
484 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
485 if (req->req.length == 0) {
486 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
487 pipe_start(r8a66597, 0);
488 transfer_complete(ep, req, 0);
489 } else {
490 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
491 irq_ep0_write(ep, req);
492 }
493 }
494
495 static void start_packet_write(struct r8a66597_ep *ep,
496 struct r8a66597_request *req)
497 {
498 struct r8a66597 *r8a66597 = ep->r8a66597;
499 u16 tmp;
500
501 pipe_change(r8a66597, ep->pipenum);
502 disable_irq_empty(r8a66597, ep->pipenum);
503 pipe_start(r8a66597, ep->pipenum);
504
505 tmp = r8a66597_read(r8a66597, ep->fifoctr);
506 if (unlikely((tmp & FRDY) == 0))
507 pipe_irq_enable(r8a66597, ep->pipenum);
508 else
509 irq_packet_write(ep, req);
510 }
511
512 static void start_packet_read(struct r8a66597_ep *ep,
513 struct r8a66597_request *req)
514 {
515 struct r8a66597 *r8a66597 = ep->r8a66597;
516 u16 pipenum = ep->pipenum;
517
518 if (ep->pipenum == 0) {
519 r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
520 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
521 pipe_start(r8a66597, pipenum);
522 pipe_irq_enable(r8a66597, pipenum);
523 } else {
524 if (ep->use_dma) {
525 r8a66597_bset(r8a66597, TRCLR, ep->fifosel);
526 pipe_change(r8a66597, pipenum);
527 r8a66597_bset(r8a66597, TRENB, ep->fifosel);
528 r8a66597_write(r8a66597,
529 (req->req.length + ep->ep.maxpacket - 1)
530 / ep->ep.maxpacket,
531 ep->fifotrn);
532 }
533 pipe_start(r8a66597, pipenum); /* trigger once */
534 pipe_irq_enable(r8a66597, pipenum);
535 }
536 }
537
538 static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
539 {
540 if (ep->desc->bEndpointAddress & USB_DIR_IN)
541 start_packet_write(ep, req);
542 else
543 start_packet_read(ep, req);
544 }
545
546 static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req)
547 {
548 u16 ctsq;
549
550 ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
551
552 switch (ctsq) {
553 case CS_RDDS:
554 start_ep0_write(ep, req);
555 break;
556 case CS_WRDS:
557 start_packet_read(ep, req);
558 break;
559
560 case CS_WRND:
561 control_end(ep->r8a66597, 0);
562 break;
563 default:
564 printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
565 break;
566 }
567 }
568
569 static void init_controller(struct r8a66597 *r8a66597)
570 {
571 u16 vif = r8a66597->pdata->vif ? LDRV : 0;
572 u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
573 u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
574
575 if (r8a66597->pdata->on_chip) {
576 r8a66597_bset(r8a66597, 0x04, SYSCFG1);
577 r8a66597_bset(r8a66597, HSE, SYSCFG0);
578
579 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
580 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
581 r8a66597_bset(r8a66597, USBE, SYSCFG0);
582
583 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
584
585 r8a66597_bset(r8a66597, irq_sense, INTENB1);
586 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
587 DMA0CFG);
588 } else {
589 r8a66597_bset(r8a66597, vif | endian, PINCFG);
590 r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
591 r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
592 XTAL, SYSCFG0);
593
594 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
595 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
596 r8a66597_bset(r8a66597, USBE, SYSCFG0);
597
598 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
599
600 msleep(3);
601
602 r8a66597_bset(r8a66597, PLLC, SYSCFG0);
603
604 msleep(1);
605
606 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
607
608 r8a66597_bset(r8a66597, irq_sense, INTENB1);
609 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
610 DMA0CFG);
611 }
612 }
613
614 static void disable_controller(struct r8a66597 *r8a66597)
615 {
616 if (r8a66597->pdata->on_chip) {
617 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
618
619 /* disable interrupts */
620 r8a66597_write(r8a66597, 0, INTENB0);
621 r8a66597_write(r8a66597, 0, INTENB1);
622 r8a66597_write(r8a66597, 0, BRDYENB);
623 r8a66597_write(r8a66597, 0, BEMPENB);
624 r8a66597_write(r8a66597, 0, NRDYENB);
625
626 /* clear status */
627 r8a66597_write(r8a66597, 0, BRDYSTS);
628 r8a66597_write(r8a66597, 0, NRDYSTS);
629 r8a66597_write(r8a66597, 0, BEMPSTS);
630
631 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
632 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
633
634 } else {
635 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
636 udelay(1);
637 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
638 udelay(1);
639 udelay(1);
640 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
641 }
642 }
643
644 static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
645 {
646 u16 tmp;
647
648 if (!r8a66597->pdata->on_chip) {
649 tmp = r8a66597_read(r8a66597, SYSCFG0);
650 if (!(tmp & XCKE))
651 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
652 }
653 }
654
655 static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
656 {
657 return list_entry(ep->queue.next, struct r8a66597_request, queue);
658 }
659
660 /*-------------------------------------------------------------------------*/
661 static void transfer_complete(struct r8a66597_ep *ep,
662 struct r8a66597_request *req, int status)
663 __releases(r8a66597->lock)
664 __acquires(r8a66597->lock)
665 {
666 int restart = 0;
667
668 if (unlikely(ep->pipenum == 0)) {
669 if (ep->internal_ccpl) {
670 ep->internal_ccpl = 0;
671 return;
672 }
673 }
674
675 list_del_init(&req->queue);
676 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
677 req->req.status = -ESHUTDOWN;
678 else
679 req->req.status = status;
680
681 if (!list_empty(&ep->queue))
682 restart = 1;
683
684 spin_unlock(&ep->r8a66597->lock);
685 req->req.complete(&ep->ep, &req->req);
686 spin_lock(&ep->r8a66597->lock);
687
688 if (restart) {
689 req = get_request_from_ep(ep);
690 if (ep->desc)
691 start_packet(ep, req);
692 }
693 }
694
695 static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
696 {
697 int i;
698 u16 tmp;
699 unsigned bufsize;
700 size_t size;
701 void *buf;
702 u16 pipenum = ep->pipenum;
703 struct r8a66597 *r8a66597 = ep->r8a66597;
704
705 pipe_change(r8a66597, pipenum);
706 r8a66597_bset(r8a66597, ISEL, ep->fifosel);
707
708 i = 0;
709 do {
710 tmp = r8a66597_read(r8a66597, ep->fifoctr);
711 if (i++ > 100000) {
712 printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus"
713 "conflict. please power off this controller.");
714 return;
715 }
716 ndelay(1);
717 } while ((tmp & FRDY) == 0);
718
719 /* prepare parameters */
720 bufsize = get_buffer_size(r8a66597, pipenum);
721 buf = req->req.buf + req->req.actual;
722 size = min(bufsize, req->req.length - req->req.actual);
723
724 /* write fifo */
725 if (req->req.buf) {
726 if (size > 0)
727 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
728 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
729 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
730 }
731
732 /* update parameters */
733 req->req.actual += size;
734
735 /* check transfer finish */
736 if ((!req->req.zero && (req->req.actual == req->req.length))
737 || (size % ep->ep.maxpacket)
738 || (size == 0)) {
739 disable_irq_ready(r8a66597, pipenum);
740 disable_irq_empty(r8a66597, pipenum);
741 } else {
742 disable_irq_ready(r8a66597, pipenum);
743 enable_irq_empty(r8a66597, pipenum);
744 }
745 pipe_start(r8a66597, pipenum);
746 }
747
748 static void irq_packet_write(struct r8a66597_ep *ep,
749 struct r8a66597_request *req)
750 {
751 u16 tmp;
752 unsigned bufsize;
753 size_t size;
754 void *buf;
755 u16 pipenum = ep->pipenum;
756 struct r8a66597 *r8a66597 = ep->r8a66597;
757
758 pipe_change(r8a66597, pipenum);
759 tmp = r8a66597_read(r8a66597, ep->fifoctr);
760 if (unlikely((tmp & FRDY) == 0)) {
761 pipe_stop(r8a66597, pipenum);
762 pipe_irq_disable(r8a66597, pipenum);
763 printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
764 return;
765 }
766
767 /* prepare parameters */
768 bufsize = get_buffer_size(r8a66597, pipenum);
769 buf = req->req.buf + req->req.actual;
770 size = min(bufsize, req->req.length - req->req.actual);
771
772 /* write fifo */
773 if (req->req.buf) {
774 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
775 if ((size == 0)
776 || ((size % ep->ep.maxpacket) != 0)
777 || ((bufsize != ep->ep.maxpacket)
778 && (bufsize > size)))
779 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
780 }
781
782 /* update parameters */
783 req->req.actual += size;
784 /* check transfer finish */
785 if ((!req->req.zero && (req->req.actual == req->req.length))
786 || (size % ep->ep.maxpacket)
787 || (size == 0)) {
788 disable_irq_ready(r8a66597, pipenum);
789 enable_irq_empty(r8a66597, pipenum);
790 } else {
791 disable_irq_empty(r8a66597, pipenum);
792 pipe_irq_enable(r8a66597, pipenum);
793 }
794 }
795
796 static void irq_packet_read(struct r8a66597_ep *ep,
797 struct r8a66597_request *req)
798 {
799 u16 tmp;
800 int rcv_len, bufsize, req_len;
801 int size;
802 void *buf;
803 u16 pipenum = ep->pipenum;
804 struct r8a66597 *r8a66597 = ep->r8a66597;
805 int finish = 0;
806
807 pipe_change(r8a66597, pipenum);
808 tmp = r8a66597_read(r8a66597, ep->fifoctr);
809 if (unlikely((tmp & FRDY) == 0)) {
810 req->req.status = -EPIPE;
811 pipe_stop(r8a66597, pipenum);
812 pipe_irq_disable(r8a66597, pipenum);
813 printk(KERN_ERR "read fifo not ready");
814 return;
815 }
816
817 /* prepare parameters */
818 rcv_len = tmp & DTLN;
819 bufsize = get_buffer_size(r8a66597, pipenum);
820
821 buf = req->req.buf + req->req.actual;
822 req_len = req->req.length - req->req.actual;
823 if (rcv_len < bufsize)
824 size = min(rcv_len, req_len);
825 else
826 size = min(bufsize, req_len);
827
828 /* update parameters */
829 req->req.actual += size;
830
831 /* check transfer finish */
832 if ((!req->req.zero && (req->req.actual == req->req.length))
833 || (size % ep->ep.maxpacket)
834 || (size == 0)) {
835 pipe_stop(r8a66597, pipenum);
836 pipe_irq_disable(r8a66597, pipenum);
837 finish = 1;
838 }
839
840 /* read fifo */
841 if (req->req.buf) {
842 if (size == 0)
843 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
844 else
845 r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
846
847 }
848
849 if ((ep->pipenum != 0) && finish)
850 transfer_complete(ep, req, 0);
851 }
852
853 static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
854 {
855 u16 check;
856 u16 pipenum;
857 struct r8a66597_ep *ep;
858 struct r8a66597_request *req;
859
860 if ((status & BRDY0) && (enb & BRDY0)) {
861 r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
862 r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
863
864 ep = &r8a66597->ep[0];
865 req = get_request_from_ep(ep);
866 irq_packet_read(ep, req);
867 } else {
868 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
869 check = 1 << pipenum;
870 if ((status & check) && (enb & check)) {
871 r8a66597_write(r8a66597, ~check, BRDYSTS);
872 ep = r8a66597->pipenum2ep[pipenum];
873 req = get_request_from_ep(ep);
874 if (ep->desc->bEndpointAddress & USB_DIR_IN)
875 irq_packet_write(ep, req);
876 else
877 irq_packet_read(ep, req);
878 }
879 }
880 }
881 }
882
883 static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
884 {
885 u16 tmp;
886 u16 check;
887 u16 pipenum;
888 struct r8a66597_ep *ep;
889 struct r8a66597_request *req;
890
891 if ((status & BEMP0) && (enb & BEMP0)) {
892 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
893
894 ep = &r8a66597->ep[0];
895 req = get_request_from_ep(ep);
896 irq_ep0_write(ep, req);
897 } else {
898 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
899 check = 1 << pipenum;
900 if ((status & check) && (enb & check)) {
901 r8a66597_write(r8a66597, ~check, BEMPSTS);
902 tmp = control_reg_get(r8a66597, pipenum);
903 if ((tmp & INBUFM) == 0) {
904 disable_irq_empty(r8a66597, pipenum);
905 pipe_irq_disable(r8a66597, pipenum);
906 pipe_stop(r8a66597, pipenum);
907 ep = r8a66597->pipenum2ep[pipenum];
908 req = get_request_from_ep(ep);
909 if (!list_empty(&ep->queue))
910 transfer_complete(ep, req, 0);
911 }
912 }
913 }
914 }
915 }
916
917 static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
918 __releases(r8a66597->lock)
919 __acquires(r8a66597->lock)
920 {
921 struct r8a66597_ep *ep;
922 u16 pid;
923 u16 status = 0;
924 u16 w_index = le16_to_cpu(ctrl->wIndex);
925
926 switch (ctrl->bRequestType & USB_RECIP_MASK) {
927 case USB_RECIP_DEVICE:
928 status = 1 << USB_DEVICE_SELF_POWERED;
929 break;
930 case USB_RECIP_INTERFACE:
931 status = 0;
932 break;
933 case USB_RECIP_ENDPOINT:
934 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
935 pid = control_reg_get_pid(r8a66597, ep->pipenum);
936 if (pid == PID_STALL)
937 status = 1 << USB_ENDPOINT_HALT;
938 else
939 status = 0;
940 break;
941 default:
942 pipe_stall(r8a66597, 0);
943 return; /* exit */
944 }
945
946 r8a66597->ep0_data = cpu_to_le16(status);
947 r8a66597->ep0_req->buf = &r8a66597->ep0_data;
948 r8a66597->ep0_req->length = 2;
949 /* AV: what happens if we get called again before that gets through? */
950 spin_unlock(&r8a66597->lock);
951 r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
952 spin_lock(&r8a66597->lock);
953 }
954
955 static void clear_feature(struct r8a66597 *r8a66597,
956 struct usb_ctrlrequest *ctrl)
957 {
958 switch (ctrl->bRequestType & USB_RECIP_MASK) {
959 case USB_RECIP_DEVICE:
960 control_end(r8a66597, 1);
961 break;
962 case USB_RECIP_INTERFACE:
963 control_end(r8a66597, 1);
964 break;
965 case USB_RECIP_ENDPOINT: {
966 struct r8a66597_ep *ep;
967 struct r8a66597_request *req;
968 u16 w_index = le16_to_cpu(ctrl->wIndex);
969
970 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
971 if (!ep->wedge) {
972 pipe_stop(r8a66597, ep->pipenum);
973 control_reg_sqclr(r8a66597, ep->pipenum);
974 spin_unlock(&r8a66597->lock);
975 usb_ep_clear_halt(&ep->ep);
976 spin_lock(&r8a66597->lock);
977 }
978
979 control_end(r8a66597, 1);
980
981 req = get_request_from_ep(ep);
982 if (ep->busy) {
983 ep->busy = 0;
984 if (list_empty(&ep->queue))
985 break;
986 start_packet(ep, req);
987 } else if (!list_empty(&ep->queue))
988 pipe_start(r8a66597, ep->pipenum);
989 }
990 break;
991 default:
992 pipe_stall(r8a66597, 0);
993 break;
994 }
995 }
996
997 static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
998 {
999
1000 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1001 case USB_RECIP_DEVICE:
1002 control_end(r8a66597, 1);
1003 break;
1004 case USB_RECIP_INTERFACE:
1005 control_end(r8a66597, 1);
1006 break;
1007 case USB_RECIP_ENDPOINT: {
1008 struct r8a66597_ep *ep;
1009 u16 w_index = le16_to_cpu(ctrl->wIndex);
1010
1011 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1012 pipe_stall(r8a66597, ep->pipenum);
1013
1014 control_end(r8a66597, 1);
1015 }
1016 break;
1017 default:
1018 pipe_stall(r8a66597, 0);
1019 break;
1020 }
1021 }
1022
1023 /* if return value is true, call class driver's setup() */
1024 static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
1025 {
1026 u16 *p = (u16 *)ctrl;
1027 unsigned long offset = USBREQ;
1028 int i, ret = 0;
1029
1030 /* read fifo */
1031 r8a66597_write(r8a66597, ~VALID, INTSTS0);
1032
1033 for (i = 0; i < 4; i++)
1034 p[i] = r8a66597_read(r8a66597, offset + i*2);
1035
1036 /* check request */
1037 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1038 switch (ctrl->bRequest) {
1039 case USB_REQ_GET_STATUS:
1040 get_status(r8a66597, ctrl);
1041 break;
1042 case USB_REQ_CLEAR_FEATURE:
1043 clear_feature(r8a66597, ctrl);
1044 break;
1045 case USB_REQ_SET_FEATURE:
1046 set_feature(r8a66597, ctrl);
1047 break;
1048 default:
1049 ret = 1;
1050 break;
1051 }
1052 } else
1053 ret = 1;
1054 return ret;
1055 }
1056
1057 static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
1058 {
1059 u16 speed = get_usb_speed(r8a66597);
1060
1061 switch (speed) {
1062 case HSMODE:
1063 r8a66597->gadget.speed = USB_SPEED_HIGH;
1064 break;
1065 case FSMODE:
1066 r8a66597->gadget.speed = USB_SPEED_FULL;
1067 break;
1068 default:
1069 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
1070 printk(KERN_ERR "USB speed unknown\n");
1071 }
1072 }
1073
1074 static void irq_device_state(struct r8a66597 *r8a66597)
1075 {
1076 u16 dvsq;
1077
1078 dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
1079 r8a66597_write(r8a66597, ~DVST, INTSTS0);
1080
1081 if (dvsq == DS_DFLT) {
1082 /* bus reset */
1083 r8a66597->driver->disconnect(&r8a66597->gadget);
1084 r8a66597_update_usb_speed(r8a66597);
1085 }
1086 if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
1087 r8a66597_update_usb_speed(r8a66597);
1088 if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
1089 && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1090 r8a66597_update_usb_speed(r8a66597);
1091
1092 r8a66597->old_dvsq = dvsq;
1093 }
1094
1095 static void irq_control_stage(struct r8a66597 *r8a66597)
1096 __releases(r8a66597->lock)
1097 __acquires(r8a66597->lock)
1098 {
1099 struct usb_ctrlrequest ctrl;
1100 u16 ctsq;
1101
1102 ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
1103 r8a66597_write(r8a66597, ~CTRT, INTSTS0);
1104
1105 switch (ctsq) {
1106 case CS_IDST: {
1107 struct r8a66597_ep *ep;
1108 struct r8a66597_request *req;
1109 ep = &r8a66597->ep[0];
1110 req = get_request_from_ep(ep);
1111 transfer_complete(ep, req, 0);
1112 }
1113 break;
1114
1115 case CS_RDDS:
1116 case CS_WRDS:
1117 case CS_WRND:
1118 if (setup_packet(r8a66597, &ctrl)) {
1119 spin_unlock(&r8a66597->lock);
1120 if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
1121 < 0)
1122 pipe_stall(r8a66597, 0);
1123 spin_lock(&r8a66597->lock);
1124 }
1125 break;
1126 case CS_RDSS:
1127 case CS_WRSS:
1128 control_end(r8a66597, 0);
1129 break;
1130 default:
1131 printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1132 break;
1133 }
1134 }
1135
1136 static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
1137 {
1138 struct r8a66597 *r8a66597 = _r8a66597;
1139 u16 intsts0;
1140 u16 intenb0;
1141 u16 brdysts, nrdysts, bempsts;
1142 u16 brdyenb, nrdyenb, bempenb;
1143 u16 savepipe;
1144 u16 mask0;
1145
1146 spin_lock(&r8a66597->lock);
1147
1148 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1149 intenb0 = r8a66597_read(r8a66597, INTENB0);
1150
1151 savepipe = r8a66597_read(r8a66597, CFIFOSEL);
1152
1153 mask0 = intsts0 & intenb0;
1154 if (mask0) {
1155 brdysts = r8a66597_read(r8a66597, BRDYSTS);
1156 nrdysts = r8a66597_read(r8a66597, NRDYSTS);
1157 bempsts = r8a66597_read(r8a66597, BEMPSTS);
1158 brdyenb = r8a66597_read(r8a66597, BRDYENB);
1159 nrdyenb = r8a66597_read(r8a66597, NRDYENB);
1160 bempenb = r8a66597_read(r8a66597, BEMPENB);
1161
1162 if (mask0 & VBINT) {
1163 r8a66597_write(r8a66597, 0xffff & ~VBINT,
1164 INTSTS0);
1165 r8a66597_start_xclock(r8a66597);
1166
1167 /* start vbus sampling */
1168 r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
1169 & VBSTS;
1170 r8a66597->scount = R8A66597_MAX_SAMPLING;
1171
1172 mod_timer(&r8a66597->timer,
1173 jiffies + msecs_to_jiffies(50));
1174 }
1175 if (intsts0 & DVSQ)
1176 irq_device_state(r8a66597);
1177
1178 if ((intsts0 & BRDY) && (intenb0 & BRDYE)
1179 && (brdysts & brdyenb))
1180 irq_pipe_ready(r8a66597, brdysts, brdyenb);
1181 if ((intsts0 & BEMP) && (intenb0 & BEMPE)
1182 && (bempsts & bempenb))
1183 irq_pipe_empty(r8a66597, bempsts, bempenb);
1184
1185 if (intsts0 & CTRT)
1186 irq_control_stage(r8a66597);
1187 }
1188
1189 r8a66597_write(r8a66597, savepipe, CFIFOSEL);
1190
1191 spin_unlock(&r8a66597->lock);
1192 return IRQ_HANDLED;
1193 }
1194
1195 static void r8a66597_timer(unsigned long _r8a66597)
1196 {
1197 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1198 unsigned long flags;
1199 u16 tmp;
1200
1201 spin_lock_irqsave(&r8a66597->lock, flags);
1202 tmp = r8a66597_read(r8a66597, SYSCFG0);
1203 if (r8a66597->scount > 0) {
1204 tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
1205 if (tmp == r8a66597->old_vbus) {
1206 r8a66597->scount--;
1207 if (r8a66597->scount == 0) {
1208 if (tmp == VBSTS)
1209 r8a66597_usb_connect(r8a66597);
1210 else
1211 r8a66597_usb_disconnect(r8a66597);
1212 } else {
1213 mod_timer(&r8a66597->timer,
1214 jiffies + msecs_to_jiffies(50));
1215 }
1216 } else {
1217 r8a66597->scount = R8A66597_MAX_SAMPLING;
1218 r8a66597->old_vbus = tmp;
1219 mod_timer(&r8a66597->timer,
1220 jiffies + msecs_to_jiffies(50));
1221 }
1222 }
1223 spin_unlock_irqrestore(&r8a66597->lock, flags);
1224 }
1225
1226 /*-------------------------------------------------------------------------*/
1227 static int r8a66597_enable(struct usb_ep *_ep,
1228 const struct usb_endpoint_descriptor *desc)
1229 {
1230 struct r8a66597_ep *ep;
1231
1232 ep = container_of(_ep, struct r8a66597_ep, ep);
1233 return alloc_pipe_config(ep, desc);
1234 }
1235
1236 static int r8a66597_disable(struct usb_ep *_ep)
1237 {
1238 struct r8a66597_ep *ep;
1239 struct r8a66597_request *req;
1240 unsigned long flags;
1241
1242 ep = container_of(_ep, struct r8a66597_ep, ep);
1243 BUG_ON(!ep);
1244
1245 while (!list_empty(&ep->queue)) {
1246 req = get_request_from_ep(ep);
1247 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1248 transfer_complete(ep, req, -ECONNRESET);
1249 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1250 }
1251
1252 pipe_irq_disable(ep->r8a66597, ep->pipenum);
1253 return free_pipe_config(ep);
1254 }
1255
1256 static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
1257 gfp_t gfp_flags)
1258 {
1259 struct r8a66597_request *req;
1260
1261 req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
1262 if (!req)
1263 return NULL;
1264
1265 INIT_LIST_HEAD(&req->queue);
1266
1267 return &req->req;
1268 }
1269
1270 static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
1271 {
1272 struct r8a66597_request *req;
1273
1274 req = container_of(_req, struct r8a66597_request, req);
1275 kfree(req);
1276 }
1277
1278 static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
1279 gfp_t gfp_flags)
1280 {
1281 struct r8a66597_ep *ep;
1282 struct r8a66597_request *req;
1283 unsigned long flags;
1284 int request = 0;
1285
1286 ep = container_of(_ep, struct r8a66597_ep, ep);
1287 req = container_of(_req, struct r8a66597_request, req);
1288
1289 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1290 return -ESHUTDOWN;
1291
1292 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1293
1294 if (list_empty(&ep->queue))
1295 request = 1;
1296
1297 list_add_tail(&req->queue, &ep->queue);
1298 req->req.actual = 0;
1299 req->req.status = -EINPROGRESS;
1300
1301 if (ep->desc == NULL) /* control */
1302 start_ep0(ep, req);
1303 else {
1304 if (request && !ep->busy)
1305 start_packet(ep, req);
1306 }
1307
1308 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1309
1310 return 0;
1311 }
1312
1313 static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1314 {
1315 struct r8a66597_ep *ep;
1316 struct r8a66597_request *req;
1317 unsigned long flags;
1318
1319 ep = container_of(_ep, struct r8a66597_ep, ep);
1320 req = container_of(_req, struct r8a66597_request, req);
1321
1322 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1323 if (!list_empty(&ep->queue))
1324 transfer_complete(ep, req, -ECONNRESET);
1325 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1326
1327 return 0;
1328 }
1329
1330 static int r8a66597_set_halt(struct usb_ep *_ep, int value)
1331 {
1332 struct r8a66597_ep *ep;
1333 struct r8a66597_request *req;
1334 unsigned long flags;
1335 int ret = 0;
1336
1337 ep = container_of(_ep, struct r8a66597_ep, ep);
1338 req = get_request_from_ep(ep);
1339
1340 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1341 if (!list_empty(&ep->queue)) {
1342 ret = -EAGAIN;
1343 goto out;
1344 }
1345 if (value) {
1346 ep->busy = 1;
1347 pipe_stall(ep->r8a66597, ep->pipenum);
1348 } else {
1349 ep->busy = 0;
1350 ep->wedge = 0;
1351 pipe_stop(ep->r8a66597, ep->pipenum);
1352 }
1353
1354 out:
1355 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1356 return ret;
1357 }
1358
1359 static int r8a66597_set_wedge(struct usb_ep *_ep)
1360 {
1361 struct r8a66597_ep *ep;
1362 unsigned long flags;
1363
1364 ep = container_of(_ep, struct r8a66597_ep, ep);
1365
1366 if (!ep || !ep->desc)
1367 return -EINVAL;
1368
1369 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1370 ep->wedge = 1;
1371 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1372
1373 return usb_ep_set_halt(_ep);
1374 }
1375
1376 static void r8a66597_fifo_flush(struct usb_ep *_ep)
1377 {
1378 struct r8a66597_ep *ep;
1379 unsigned long flags;
1380
1381 ep = container_of(_ep, struct r8a66597_ep, ep);
1382 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1383 if (list_empty(&ep->queue) && !ep->busy) {
1384 pipe_stop(ep->r8a66597, ep->pipenum);
1385 r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
1386 }
1387 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1388 }
1389
1390 static struct usb_ep_ops r8a66597_ep_ops = {
1391 .enable = r8a66597_enable,
1392 .disable = r8a66597_disable,
1393
1394 .alloc_request = r8a66597_alloc_request,
1395 .free_request = r8a66597_free_request,
1396
1397 .queue = r8a66597_queue,
1398 .dequeue = r8a66597_dequeue,
1399
1400 .set_halt = r8a66597_set_halt,
1401 .set_wedge = r8a66597_set_wedge,
1402 .fifo_flush = r8a66597_fifo_flush,
1403 };
1404
1405 /*-------------------------------------------------------------------------*/
1406 static struct r8a66597 *the_controller;
1407
1408 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1409 {
1410 struct r8a66597 *r8a66597 = the_controller;
1411 int retval;
1412
1413 if (!driver
1414 || driver->speed != USB_SPEED_HIGH
1415 || !driver->bind
1416 || !driver->setup)
1417 return -EINVAL;
1418 if (!r8a66597)
1419 return -ENODEV;
1420 if (r8a66597->driver)
1421 return -EBUSY;
1422
1423 /* hook up the driver */
1424 driver->driver.bus = NULL;
1425 r8a66597->driver = driver;
1426 r8a66597->gadget.dev.driver = &driver->driver;
1427
1428 retval = device_add(&r8a66597->gadget.dev);
1429 if (retval) {
1430 printk(KERN_ERR "device_add error (%d)\n", retval);
1431 goto error;
1432 }
1433
1434 retval = driver->bind(&r8a66597->gadget);
1435 if (retval) {
1436 printk(KERN_ERR "bind to driver error (%d)\n", retval);
1437 device_del(&r8a66597->gadget.dev);
1438 goto error;
1439 }
1440
1441 r8a66597_bset(r8a66597, VBSE, INTENB0);
1442 if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
1443 r8a66597_start_xclock(r8a66597);
1444 /* start vbus sampling */
1445 r8a66597->old_vbus = r8a66597_read(r8a66597,
1446 INTSTS0) & VBSTS;
1447 r8a66597->scount = R8A66597_MAX_SAMPLING;
1448 mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
1449 }
1450
1451 return 0;
1452
1453 error:
1454 r8a66597->driver = NULL;
1455 r8a66597->gadget.dev.driver = NULL;
1456
1457 return retval;
1458 }
1459 EXPORT_SYMBOL(usb_gadget_register_driver);
1460
1461 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1462 {
1463 struct r8a66597 *r8a66597 = the_controller;
1464 unsigned long flags;
1465
1466 if (driver != r8a66597->driver || !driver->unbind)
1467 return -EINVAL;
1468
1469 spin_lock_irqsave(&r8a66597->lock, flags);
1470 if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
1471 r8a66597_usb_disconnect(r8a66597);
1472 spin_unlock_irqrestore(&r8a66597->lock, flags);
1473
1474 r8a66597_bclr(r8a66597, VBSE, INTENB0);
1475
1476 driver->unbind(&r8a66597->gadget);
1477
1478 init_controller(r8a66597);
1479 disable_controller(r8a66597);
1480
1481 device_del(&r8a66597->gadget.dev);
1482 r8a66597->driver = NULL;
1483 return 0;
1484 }
1485 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1486
1487 /*-------------------------------------------------------------------------*/
1488 static int r8a66597_get_frame(struct usb_gadget *_gadget)
1489 {
1490 struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
1491 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1492 }
1493
1494 static struct usb_gadget_ops r8a66597_gadget_ops = {
1495 .get_frame = r8a66597_get_frame,
1496 };
1497
1498 static int __exit r8a66597_remove(struct platform_device *pdev)
1499 {
1500 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
1501
1502 del_timer_sync(&r8a66597->timer);
1503 iounmap(r8a66597->reg);
1504 free_irq(platform_get_irq(pdev, 0), r8a66597);
1505 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
1506 #ifdef CONFIG_HAVE_CLK
1507 if (r8a66597->pdata->on_chip) {
1508 clk_disable(r8a66597->clk);
1509 clk_put(r8a66597->clk);
1510 }
1511 #endif
1512 kfree(r8a66597);
1513 return 0;
1514 }
1515
1516 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1517 {
1518 }
1519
1520 static int __init r8a66597_probe(struct platform_device *pdev)
1521 {
1522 #ifdef CONFIG_HAVE_CLK
1523 char clk_name[8];
1524 #endif
1525 struct resource *res, *ires;
1526 int irq;
1527 void __iomem *reg = NULL;
1528 struct r8a66597 *r8a66597 = NULL;
1529 int ret = 0;
1530 int i;
1531 unsigned long irq_trigger;
1532
1533 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1534 if (!res) {
1535 ret = -ENODEV;
1536 printk(KERN_ERR "platform_get_resource error.\n");
1537 goto clean_up;
1538 }
1539
1540 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1541 irq = ires->start;
1542 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1543
1544 if (irq < 0) {
1545 ret = -ENODEV;
1546 printk(KERN_ERR "platform_get_irq error.\n");
1547 goto clean_up;
1548 }
1549
1550 reg = ioremap(res->start, resource_size(res));
1551 if (reg == NULL) {
1552 ret = -ENOMEM;
1553 printk(KERN_ERR "ioremap error.\n");
1554 goto clean_up;
1555 }
1556
1557 /* initialize ucd */
1558 r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
1559 if (r8a66597 == NULL) {
1560 ret = -ENOMEM;
1561 printk(KERN_ERR "kzalloc error\n");
1562 goto clean_up;
1563 }
1564
1565 spin_lock_init(&r8a66597->lock);
1566 dev_set_drvdata(&pdev->dev, r8a66597);
1567 r8a66597->pdata = pdev->dev.platform_data;
1568 r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
1569
1570 r8a66597->gadget.ops = &r8a66597_gadget_ops;
1571 device_initialize(&r8a66597->gadget.dev);
1572 dev_set_name(&r8a66597->gadget.dev, "gadget");
1573 r8a66597->gadget.is_dualspeed = 1;
1574 r8a66597->gadget.dev.parent = &pdev->dev;
1575 r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
1576 r8a66597->gadget.dev.release = pdev->dev.release;
1577 r8a66597->gadget.name = udc_name;
1578
1579 init_timer(&r8a66597->timer);
1580 r8a66597->timer.function = r8a66597_timer;
1581 r8a66597->timer.data = (unsigned long)r8a66597;
1582 r8a66597->reg = reg;
1583
1584 #ifdef CONFIG_HAVE_CLK
1585 if (r8a66597->pdata->on_chip) {
1586 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
1587 r8a66597->clk = clk_get(&pdev->dev, clk_name);
1588 if (IS_ERR(r8a66597->clk)) {
1589 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1590 clk_name);
1591 ret = PTR_ERR(r8a66597->clk);
1592 goto clean_up;
1593 }
1594 clk_enable(r8a66597->clk);
1595 }
1596 #endif
1597
1598 disable_controller(r8a66597); /* make sure controller is disabled */
1599
1600 ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
1601 udc_name, r8a66597);
1602 if (ret < 0) {
1603 printk(KERN_ERR "request_irq error (%d)\n", ret);
1604 goto clean_up2;
1605 }
1606
1607 INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
1608 r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
1609 INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
1610 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
1611 struct r8a66597_ep *ep = &r8a66597->ep[i];
1612
1613 if (i != 0) {
1614 INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
1615 list_add_tail(&r8a66597->ep[i].ep.ep_list,
1616 &r8a66597->gadget.ep_list);
1617 }
1618 ep->r8a66597 = r8a66597;
1619 INIT_LIST_HEAD(&ep->queue);
1620 ep->ep.name = r8a66597_ep_name[i];
1621 ep->ep.ops = &r8a66597_ep_ops;
1622 ep->ep.maxpacket = 512;
1623 }
1624 r8a66597->ep[0].ep.maxpacket = 64;
1625 r8a66597->ep[0].pipenum = 0;
1626 r8a66597->ep[0].fifoaddr = CFIFO;
1627 r8a66597->ep[0].fifosel = CFIFOSEL;
1628 r8a66597->ep[0].fifoctr = CFIFOCTR;
1629 r8a66597->ep[0].fifotrn = 0;
1630 r8a66597->ep[0].pipectr = get_pipectr_addr(0);
1631 r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
1632 r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
1633
1634 the_controller = r8a66597;
1635
1636 r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
1637 GFP_KERNEL);
1638 if (r8a66597->ep0_req == NULL)
1639 goto clean_up3;
1640 r8a66597->ep0_req->complete = nop_completion;
1641
1642 init_controller(r8a66597);
1643
1644 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1645 return 0;
1646
1647 clean_up3:
1648 free_irq(irq, r8a66597);
1649 clean_up2:
1650 #ifdef CONFIG_HAVE_CLK
1651 if (r8a66597->pdata->on_chip) {
1652 clk_disable(r8a66597->clk);
1653 clk_put(r8a66597->clk);
1654 }
1655 #endif
1656 clean_up:
1657 if (r8a66597) {
1658 if (r8a66597->ep0_req)
1659 r8a66597_free_request(&r8a66597->ep[0].ep,
1660 r8a66597->ep0_req);
1661 kfree(r8a66597);
1662 }
1663 if (reg)
1664 iounmap(reg);
1665
1666 return ret;
1667 }
1668
1669 /*-------------------------------------------------------------------------*/
1670 static struct platform_driver r8a66597_driver = {
1671 .remove = __exit_p(r8a66597_remove),
1672 .driver = {
1673 .name = (char *) udc_name,
1674 },
1675 };
1676
1677 static int __init r8a66597_udc_init(void)
1678 {
1679 return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
1680 }
1681 module_init(r8a66597_udc_init);
1682
1683 static void __exit r8a66597_udc_cleanup(void)
1684 {
1685 platform_driver_unregister(&r8a66597_driver);
1686 }
1687 module_exit(r8a66597_udc_cleanup);
1688
1689 MODULE_DESCRIPTION("R8A66597 USB gadget driver");
1690 MODULE_LICENSE("GPL");
1691 MODULE_AUTHOR("Yoshihiro Shimoda");
1692
Linux with added FPC-III support