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usb: gadget: r8a66597-udc: fix cannot connect after rmmod gadget driver
[deliverable/linux.git] / drivers / usb / gadget / r8a66597-udc.c
1 /*
2 * R8A66597 UDC (USB gadget)
3 *
4 * Copyright (C) 2006-2009 Renesas Solutions Corp.
5 *
6 * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * 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 spin_unlock(&r8a66597->lock);
1087 r8a66597->driver->disconnect(&r8a66597->gadget);
1088 spin_lock(&r8a66597->lock);
1089 r8a66597_update_usb_speed(r8a66597);
1090 }
1091 if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
1092 r8a66597_update_usb_speed(r8a66597);
1093 if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
1094 && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1095 r8a66597_update_usb_speed(r8a66597);
1096
1097 r8a66597->old_dvsq = dvsq;
1098 }
1099
1100 static void irq_control_stage(struct r8a66597 *r8a66597)
1101 __releases(r8a66597->lock)
1102 __acquires(r8a66597->lock)
1103 {
1104 struct usb_ctrlrequest ctrl;
1105 u16 ctsq;
1106
1107 ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
1108 r8a66597_write(r8a66597, ~CTRT, INTSTS0);
1109
1110 switch (ctsq) {
1111 case CS_IDST: {
1112 struct r8a66597_ep *ep;
1113 struct r8a66597_request *req;
1114 ep = &r8a66597->ep[0];
1115 req = get_request_from_ep(ep);
1116 transfer_complete(ep, req, 0);
1117 }
1118 break;
1119
1120 case CS_RDDS:
1121 case CS_WRDS:
1122 case CS_WRND:
1123 if (setup_packet(r8a66597, &ctrl)) {
1124 spin_unlock(&r8a66597->lock);
1125 if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
1126 < 0)
1127 pipe_stall(r8a66597, 0);
1128 spin_lock(&r8a66597->lock);
1129 }
1130 break;
1131 case CS_RDSS:
1132 case CS_WRSS:
1133 control_end(r8a66597, 0);
1134 break;
1135 default:
1136 printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1137 break;
1138 }
1139 }
1140
1141 static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
1142 {
1143 struct r8a66597 *r8a66597 = _r8a66597;
1144 u16 intsts0;
1145 u16 intenb0;
1146 u16 brdysts, nrdysts, bempsts;
1147 u16 brdyenb, nrdyenb, bempenb;
1148 u16 savepipe;
1149 u16 mask0;
1150
1151 spin_lock(&r8a66597->lock);
1152
1153 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1154 intenb0 = r8a66597_read(r8a66597, INTENB0);
1155
1156 savepipe = r8a66597_read(r8a66597, CFIFOSEL);
1157
1158 mask0 = intsts0 & intenb0;
1159 if (mask0) {
1160 brdysts = r8a66597_read(r8a66597, BRDYSTS);
1161 nrdysts = r8a66597_read(r8a66597, NRDYSTS);
1162 bempsts = r8a66597_read(r8a66597, BEMPSTS);
1163 brdyenb = r8a66597_read(r8a66597, BRDYENB);
1164 nrdyenb = r8a66597_read(r8a66597, NRDYENB);
1165 bempenb = r8a66597_read(r8a66597, BEMPENB);
1166
1167 if (mask0 & VBINT) {
1168 r8a66597_write(r8a66597, 0xffff & ~VBINT,
1169 INTSTS0);
1170 r8a66597_start_xclock(r8a66597);
1171
1172 /* start vbus sampling */
1173 r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
1174 & VBSTS;
1175 r8a66597->scount = R8A66597_MAX_SAMPLING;
1176
1177 mod_timer(&r8a66597->timer,
1178 jiffies + msecs_to_jiffies(50));
1179 }
1180 if (intsts0 & DVSQ)
1181 irq_device_state(r8a66597);
1182
1183 if ((intsts0 & BRDY) && (intenb0 & BRDYE)
1184 && (brdysts & brdyenb))
1185 irq_pipe_ready(r8a66597, brdysts, brdyenb);
1186 if ((intsts0 & BEMP) && (intenb0 & BEMPE)
1187 && (bempsts & bempenb))
1188 irq_pipe_empty(r8a66597, bempsts, bempenb);
1189
1190 if (intsts0 & CTRT)
1191 irq_control_stage(r8a66597);
1192 }
1193
1194 r8a66597_write(r8a66597, savepipe, CFIFOSEL);
1195
1196 spin_unlock(&r8a66597->lock);
1197 return IRQ_HANDLED;
1198 }
1199
1200 static void r8a66597_timer(unsigned long _r8a66597)
1201 {
1202 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1203 unsigned long flags;
1204 u16 tmp;
1205
1206 spin_lock_irqsave(&r8a66597->lock, flags);
1207 tmp = r8a66597_read(r8a66597, SYSCFG0);
1208 if (r8a66597->scount > 0) {
1209 tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
1210 if (tmp == r8a66597->old_vbus) {
1211 r8a66597->scount--;
1212 if (r8a66597->scount == 0) {
1213 if (tmp == VBSTS)
1214 r8a66597_usb_connect(r8a66597);
1215 else
1216 r8a66597_usb_disconnect(r8a66597);
1217 } else {
1218 mod_timer(&r8a66597->timer,
1219 jiffies + msecs_to_jiffies(50));
1220 }
1221 } else {
1222 r8a66597->scount = R8A66597_MAX_SAMPLING;
1223 r8a66597->old_vbus = tmp;
1224 mod_timer(&r8a66597->timer,
1225 jiffies + msecs_to_jiffies(50));
1226 }
1227 }
1228 spin_unlock_irqrestore(&r8a66597->lock, flags);
1229 }
1230
1231 /*-------------------------------------------------------------------------*/
1232 static int r8a66597_enable(struct usb_ep *_ep,
1233 const struct usb_endpoint_descriptor *desc)
1234 {
1235 struct r8a66597_ep *ep;
1236
1237 ep = container_of(_ep, struct r8a66597_ep, ep);
1238 return alloc_pipe_config(ep, desc);
1239 }
1240
1241 static int r8a66597_disable(struct usb_ep *_ep)
1242 {
1243 struct r8a66597_ep *ep;
1244 struct r8a66597_request *req;
1245 unsigned long flags;
1246
1247 ep = container_of(_ep, struct r8a66597_ep, ep);
1248 BUG_ON(!ep);
1249
1250 while (!list_empty(&ep->queue)) {
1251 req = get_request_from_ep(ep);
1252 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1253 transfer_complete(ep, req, -ECONNRESET);
1254 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1255 }
1256
1257 pipe_irq_disable(ep->r8a66597, ep->pipenum);
1258 return free_pipe_config(ep);
1259 }
1260
1261 static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
1262 gfp_t gfp_flags)
1263 {
1264 struct r8a66597_request *req;
1265
1266 req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
1267 if (!req)
1268 return NULL;
1269
1270 INIT_LIST_HEAD(&req->queue);
1271
1272 return &req->req;
1273 }
1274
1275 static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
1276 {
1277 struct r8a66597_request *req;
1278
1279 req = container_of(_req, struct r8a66597_request, req);
1280 kfree(req);
1281 }
1282
1283 static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
1284 gfp_t gfp_flags)
1285 {
1286 struct r8a66597_ep *ep;
1287 struct r8a66597_request *req;
1288 unsigned long flags;
1289 int request = 0;
1290
1291 ep = container_of(_ep, struct r8a66597_ep, ep);
1292 req = container_of(_req, struct r8a66597_request, req);
1293
1294 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1295 return -ESHUTDOWN;
1296
1297 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1298
1299 if (list_empty(&ep->queue))
1300 request = 1;
1301
1302 list_add_tail(&req->queue, &ep->queue);
1303 req->req.actual = 0;
1304 req->req.status = -EINPROGRESS;
1305
1306 if (ep->desc == NULL) /* control */
1307 start_ep0(ep, req);
1308 else {
1309 if (request && !ep->busy)
1310 start_packet(ep, req);
1311 }
1312
1313 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1314
1315 return 0;
1316 }
1317
1318 static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1319 {
1320 struct r8a66597_ep *ep;
1321 struct r8a66597_request *req;
1322 unsigned long flags;
1323
1324 ep = container_of(_ep, struct r8a66597_ep, ep);
1325 req = container_of(_req, struct r8a66597_request, req);
1326
1327 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1328 if (!list_empty(&ep->queue))
1329 transfer_complete(ep, req, -ECONNRESET);
1330 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1331
1332 return 0;
1333 }
1334
1335 static int r8a66597_set_halt(struct usb_ep *_ep, int value)
1336 {
1337 struct r8a66597_ep *ep;
1338 struct r8a66597_request *req;
1339 unsigned long flags;
1340 int ret = 0;
1341
1342 ep = container_of(_ep, struct r8a66597_ep, ep);
1343 req = get_request_from_ep(ep);
1344
1345 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1346 if (!list_empty(&ep->queue)) {
1347 ret = -EAGAIN;
1348 goto out;
1349 }
1350 if (value) {
1351 ep->busy = 1;
1352 pipe_stall(ep->r8a66597, ep->pipenum);
1353 } else {
1354 ep->busy = 0;
1355 ep->wedge = 0;
1356 pipe_stop(ep->r8a66597, ep->pipenum);
1357 }
1358
1359 out:
1360 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1361 return ret;
1362 }
1363
1364 static int r8a66597_set_wedge(struct usb_ep *_ep)
1365 {
1366 struct r8a66597_ep *ep;
1367 unsigned long flags;
1368
1369 ep = container_of(_ep, struct r8a66597_ep, ep);
1370
1371 if (!ep || !ep->desc)
1372 return -EINVAL;
1373
1374 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1375 ep->wedge = 1;
1376 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1377
1378 return usb_ep_set_halt(_ep);
1379 }
1380
1381 static void r8a66597_fifo_flush(struct usb_ep *_ep)
1382 {
1383 struct r8a66597_ep *ep;
1384 unsigned long flags;
1385
1386 ep = container_of(_ep, struct r8a66597_ep, ep);
1387 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1388 if (list_empty(&ep->queue) && !ep->busy) {
1389 pipe_stop(ep->r8a66597, ep->pipenum);
1390 r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
1391 }
1392 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1393 }
1394
1395 static struct usb_ep_ops r8a66597_ep_ops = {
1396 .enable = r8a66597_enable,
1397 .disable = r8a66597_disable,
1398
1399 .alloc_request = r8a66597_alloc_request,
1400 .free_request = r8a66597_free_request,
1401
1402 .queue = r8a66597_queue,
1403 .dequeue = r8a66597_dequeue,
1404
1405 .set_halt = r8a66597_set_halt,
1406 .set_wedge = r8a66597_set_wedge,
1407 .fifo_flush = r8a66597_fifo_flush,
1408 };
1409
1410 /*-------------------------------------------------------------------------*/
1411 static struct r8a66597 *the_controller;
1412
1413 static int r8a66597_start(struct usb_gadget_driver *driver,
1414 int (*bind)(struct usb_gadget *))
1415 {
1416 struct r8a66597 *r8a66597 = the_controller;
1417 int retval;
1418
1419 if (!driver
1420 || driver->speed != USB_SPEED_HIGH
1421 || !bind
1422 || !driver->setup)
1423 return -EINVAL;
1424 if (!r8a66597)
1425 return -ENODEV;
1426 if (r8a66597->driver)
1427 return -EBUSY;
1428
1429 /* hook up the driver */
1430 driver->driver.bus = NULL;
1431 r8a66597->driver = driver;
1432 r8a66597->gadget.dev.driver = &driver->driver;
1433
1434 retval = device_add(&r8a66597->gadget.dev);
1435 if (retval) {
1436 printk(KERN_ERR "device_add error (%d)\n", retval);
1437 goto error;
1438 }
1439
1440 retval = bind(&r8a66597->gadget);
1441 if (retval) {
1442 printk(KERN_ERR "bind to driver error (%d)\n", retval);
1443 device_del(&r8a66597->gadget.dev);
1444 goto error;
1445 }
1446
1447 init_controller(r8a66597);
1448 r8a66597_bset(r8a66597, VBSE, INTENB0);
1449 if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
1450 r8a66597_start_xclock(r8a66597);
1451 /* start vbus sampling */
1452 r8a66597->old_vbus = r8a66597_read(r8a66597,
1453 INTSTS0) & VBSTS;
1454 r8a66597->scount = R8A66597_MAX_SAMPLING;
1455 mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
1456 }
1457
1458 return 0;
1459
1460 error:
1461 r8a66597->driver = NULL;
1462 r8a66597->gadget.dev.driver = NULL;
1463
1464 return retval;
1465 }
1466
1467 static int r8a66597_stop(struct usb_gadget_driver *driver)
1468 {
1469 struct r8a66597 *r8a66597 = the_controller;
1470 unsigned long flags;
1471
1472 if (driver != r8a66597->driver || !driver->unbind)
1473 return -EINVAL;
1474
1475 spin_lock_irqsave(&r8a66597->lock, flags);
1476 if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
1477 r8a66597_usb_disconnect(r8a66597);
1478 r8a66597_bclr(r8a66597, VBSE, INTENB0);
1479 disable_controller(r8a66597);
1480 spin_unlock_irqrestore(&r8a66597->lock, flags);
1481
1482 driver->unbind(&r8a66597->gadget);
1483
1484 device_del(&r8a66597->gadget.dev);
1485 r8a66597->driver = NULL;
1486 return 0;
1487 }
1488
1489 /*-------------------------------------------------------------------------*/
1490 static int r8a66597_get_frame(struct usb_gadget *_gadget)
1491 {
1492 struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
1493 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1494 }
1495
1496 static struct usb_gadget_ops r8a66597_gadget_ops = {
1497 .get_frame = r8a66597_get_frame,
1498 .start = r8a66597_start,
1499 .stop = r8a66597_stop,
1500 };
1501
1502 static int __exit r8a66597_remove(struct platform_device *pdev)
1503 {
1504 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
1505
1506 usb_del_gadget_udc(&r8a66597->gadget);
1507 del_timer_sync(&r8a66597->timer);
1508 iounmap(r8a66597->reg);
1509 free_irq(platform_get_irq(pdev, 0), r8a66597);
1510 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
1511 #ifdef CONFIG_HAVE_CLK
1512 if (r8a66597->pdata->on_chip) {
1513 clk_disable(r8a66597->clk);
1514 clk_put(r8a66597->clk);
1515 }
1516 #endif
1517 kfree(r8a66597);
1518 return 0;
1519 }
1520
1521 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1522 {
1523 }
1524
1525 static int __init r8a66597_probe(struct platform_device *pdev)
1526 {
1527 #ifdef CONFIG_HAVE_CLK
1528 char clk_name[8];
1529 #endif
1530 struct resource *res, *ires;
1531 int irq;
1532 void __iomem *reg = NULL;
1533 struct r8a66597 *r8a66597 = NULL;
1534 int ret = 0;
1535 int i;
1536 unsigned long irq_trigger;
1537
1538 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1539 if (!res) {
1540 ret = -ENODEV;
1541 printk(KERN_ERR "platform_get_resource error.\n");
1542 goto clean_up;
1543 }
1544
1545 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1546 irq = ires->start;
1547 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1548
1549 if (irq < 0) {
1550 ret = -ENODEV;
1551 printk(KERN_ERR "platform_get_irq error.\n");
1552 goto clean_up;
1553 }
1554
1555 reg = ioremap(res->start, resource_size(res));
1556 if (reg == NULL) {
1557 ret = -ENOMEM;
1558 printk(KERN_ERR "ioremap error.\n");
1559 goto clean_up;
1560 }
1561
1562 /* initialize ucd */
1563 r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
1564 if (r8a66597 == NULL) {
1565 ret = -ENOMEM;
1566 printk(KERN_ERR "kzalloc error\n");
1567 goto clean_up;
1568 }
1569
1570 spin_lock_init(&r8a66597->lock);
1571 dev_set_drvdata(&pdev->dev, r8a66597);
1572 r8a66597->pdata = pdev->dev.platform_data;
1573 r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
1574
1575 r8a66597->gadget.ops = &r8a66597_gadget_ops;
1576 device_initialize(&r8a66597->gadget.dev);
1577 dev_set_name(&r8a66597->gadget.dev, "gadget");
1578 r8a66597->gadget.is_dualspeed = 1;
1579 r8a66597->gadget.dev.parent = &pdev->dev;
1580 r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
1581 r8a66597->gadget.dev.release = pdev->dev.release;
1582 r8a66597->gadget.name = udc_name;
1583
1584 init_timer(&r8a66597->timer);
1585 r8a66597->timer.function = r8a66597_timer;
1586 r8a66597->timer.data = (unsigned long)r8a66597;
1587 r8a66597->reg = reg;
1588
1589 #ifdef CONFIG_HAVE_CLK
1590 if (r8a66597->pdata->on_chip) {
1591 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
1592 r8a66597->clk = clk_get(&pdev->dev, clk_name);
1593 if (IS_ERR(r8a66597->clk)) {
1594 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1595 clk_name);
1596 ret = PTR_ERR(r8a66597->clk);
1597 goto clean_up;
1598 }
1599 clk_enable(r8a66597->clk);
1600 }
1601 #endif
1602
1603 disable_controller(r8a66597); /* make sure controller is disabled */
1604
1605 ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
1606 udc_name, r8a66597);
1607 if (ret < 0) {
1608 printk(KERN_ERR "request_irq error (%d)\n", ret);
1609 goto clean_up2;
1610 }
1611
1612 INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
1613 r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
1614 INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
1615 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
1616 struct r8a66597_ep *ep = &r8a66597->ep[i];
1617
1618 if (i != 0) {
1619 INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
1620 list_add_tail(&r8a66597->ep[i].ep.ep_list,
1621 &r8a66597->gadget.ep_list);
1622 }
1623 ep->r8a66597 = r8a66597;
1624 INIT_LIST_HEAD(&ep->queue);
1625 ep->ep.name = r8a66597_ep_name[i];
1626 ep->ep.ops = &r8a66597_ep_ops;
1627 ep->ep.maxpacket = 512;
1628 }
1629 r8a66597->ep[0].ep.maxpacket = 64;
1630 r8a66597->ep[0].pipenum = 0;
1631 r8a66597->ep[0].fifoaddr = CFIFO;
1632 r8a66597->ep[0].fifosel = CFIFOSEL;
1633 r8a66597->ep[0].fifoctr = CFIFOCTR;
1634 r8a66597->ep[0].fifotrn = 0;
1635 r8a66597->ep[0].pipectr = get_pipectr_addr(0);
1636 r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
1637 r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
1638
1639 the_controller = r8a66597;
1640
1641 r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
1642 GFP_KERNEL);
1643 if (r8a66597->ep0_req == NULL)
1644 goto clean_up3;
1645 r8a66597->ep0_req->complete = nop_completion;
1646
1647 ret = usb_add_gadget_udc(&pdev->dev, &r8a66597->gadget);
1648 if (ret)
1649 goto err_add_udc;
1650
1651 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1652 return 0;
1653
1654 err_add_udc:
1655 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
1656 clean_up3:
1657 free_irq(irq, r8a66597);
1658 clean_up2:
1659 #ifdef CONFIG_HAVE_CLK
1660 if (r8a66597->pdata->on_chip) {
1661 clk_disable(r8a66597->clk);
1662 clk_put(r8a66597->clk);
1663 }
1664 #endif
1665 clean_up:
1666 if (r8a66597) {
1667 if (r8a66597->ep0_req)
1668 r8a66597_free_request(&r8a66597->ep[0].ep,
1669 r8a66597->ep0_req);
1670 kfree(r8a66597);
1671 }
1672 if (reg)
1673 iounmap(reg);
1674
1675 return ret;
1676 }
1677
1678 /*-------------------------------------------------------------------------*/
1679 static struct platform_driver r8a66597_driver = {
1680 .remove = __exit_p(r8a66597_remove),
1681 .driver = {
1682 .name = (char *) udc_name,
1683 },
1684 };
1685 MODULE_ALIAS("platform:r8a66597_udc");
1686
1687 static int __init r8a66597_udc_init(void)
1688 {
1689 return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
1690 }
1691 module_init(r8a66597_udc_init);
1692
1693 static void __exit r8a66597_udc_cleanup(void)
1694 {
1695 platform_driver_unregister(&r8a66597_driver);
1696 }
1697 module_exit(r8a66597_udc_cleanup);
1698
1699 MODULE_DESCRIPTION("R8A66597 USB gadget driver");
1700 MODULE_LICENSE("GPL");
1701 MODULE_AUTHOR("Yoshihiro Shimoda");
1702
Linux kernel - Deliverables
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