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Merge branch 'topic/misc' into for-linus
[linux-2.6-block.git] / drivers / usb / gadget / r8a66597-udc.c
CommitLineData
c4144247
YS		 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>
d2e27bdf 28#include <linux/clk.h>
ae3a0792 29#include <linux/err.h>
c4144247
YS		 30
31#include <linux/usb/ch9.h>
32#include <linux/usb/gadget.h>
33
34#include "r8a66597-udc.h"
35
36#define DRIVER_VERSION "2009-08-18"
37
38static const char udc_name[] = "r8a66597_udc";
39static const char *r8a66597_ep_name[] = {
40 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7",
41 "ep8", "ep9",
42};
43
44static void disable_controller(struct r8a66597 *r8a66597);
45static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
46static void irq_packet_write(struct r8a66597_ep *ep,
47 struct r8a66597_request *req);
48static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
49 gfp_t gfp_flags);
50
51static void transfer_complete(struct r8a66597_ep *ep,
52 struct r8a66597_request *req, int status);
53
54/*-------------------------------------------------------------------------*/
55static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
56{
57 return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
58}
59
60static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
61 unsigned long reg)
62{
63 u16 tmp;
64
65 tmp = r8a66597_read(r8a66597, INTENB0);
66 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
67 INTENB0);
68 r8a66597_bset(r8a66597, (1 << pipenum), reg);
69 r8a66597_write(r8a66597, tmp, INTENB0);
70}
71
72static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
73 unsigned long reg)
74{
75 u16 tmp;
76
77 tmp = r8a66597_read(r8a66597, INTENB0);
78 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
79 INTENB0);
80 r8a66597_bclr(r8a66597, (1 << pipenum), reg);
81 r8a66597_write(r8a66597, tmp, INTENB0);
82}
83
84static void r8a66597_usb_connect(struct r8a66597 *r8a66597)
85{
86 r8a66597_bset(r8a66597, CTRE, INTENB0);
87 r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
88
89 r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
90}
91
92static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
93__releases(r8a66597->lock)
94__acquires(r8a66597->lock)
95{
96 r8a66597_bclr(r8a66597, CTRE, INTENB0);
97 r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
98 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
99
100 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
101 spin_unlock(&r8a66597->lock);
102 r8a66597->driver->disconnect(&r8a66597->gadget);
103 spin_lock(&r8a66597->lock);
104
105 disable_controller(r8a66597);
106 INIT_LIST_HEAD(&r8a66597->ep[0].queue);
107}
108
109static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
110{
111 u16 pid = 0;
112 unsigned long offset;
113
114 if (pipenum == 0)
115 pid = r8a66597_read(r8a66597, DCPCTR) & PID;
116 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
117 offset = get_pipectr_addr(pipenum);
118 pid = r8a66597_read(r8a66597, offset) & PID;
119 } else
120 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
121
122 return pid;
123}
124
125static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
126 u16 pid)
127{
128 unsigned long offset;
129
130 if (pipenum == 0)
131 r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
132 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
133 offset = get_pipectr_addr(pipenum);
134 r8a66597_mdfy(r8a66597, pid, PID, offset);
135 } else
136 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
137}
138
139static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
140{
141 control_reg_set_pid(r8a66597, pipenum, PID_BUF);
142}
143
144static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
145{
146 control_reg_set_pid(r8a66597, pipenum, PID_NAK);
147}
148
149static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
150{
151 control_reg_set_pid(r8a66597, pipenum, PID_STALL);
152}
153
154static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
155{
156 u16 ret = 0;
157 unsigned long offset;
158
159 if (pipenum == 0)
160 ret = r8a66597_read(r8a66597, DCPCTR);
161 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
162 offset = get_pipectr_addr(pipenum);
163 ret = r8a66597_read(r8a66597, offset);
164 } else
165 printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
166
167 return ret;
168}
169
170static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
171{
172 unsigned long offset;
173
174 pipe_stop(r8a66597, pipenum);
175
176 if (pipenum == 0)
177 r8a66597_bset(r8a66597, SQCLR, DCPCTR);
178 else if (pipenum < R8A66597_MAX_NUM_PIPE) {
179 offset = get_pipectr_addr(pipenum);
180 r8a66597_bset(r8a66597, SQCLR, offset);
181 } else
182 printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
183}
184
185static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
186{
187 u16 tmp;
188 int size;
189
190 if (pipenum == 0) {
191 tmp = r8a66597_read(r8a66597, DCPCFG);
192 if ((tmp & R8A66597_CNTMD) != 0)
193 size = 256;
194 else {
195 tmp = r8a66597_read(r8a66597, DCPMAXP);
196 size = tmp & MAXP;
197 }
198 } else {
199 r8a66597_write(r8a66597, pipenum, PIPESEL);
200 tmp = r8a66597_read(r8a66597, PIPECFG);
201 if ((tmp & R8A66597_CNTMD) != 0) {
202 tmp = r8a66597_read(r8a66597, PIPEBUF);
203 size = ((tmp >> 10) + 1) * 64;
204 } else {
205 tmp = r8a66597_read(r8a66597, PIPEMAXP);
206 size = tmp & MXPS;
207 }
208 }
209
210 return size;
211}
212
213static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
214{
215 if (r8a66597->pdata->on_chip)
216 return MBW_32;
217 else
218 return MBW_16;
219}
220
221static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
222{
223 struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
224
225 if (ep->use_dma)
226 return;
227
228 r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
229
230 ndelay(450);
231
232 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
233}
234
235static int pipe_buffer_setting(struct r8a66597 *r8a66597,
236 struct r8a66597_pipe_info *info)
237{
238 u16 bufnum = 0, buf_bsize = 0;
239 u16 pipecfg = 0;
240
241 if (info->pipe == 0)
242 return -EINVAL;
243
244 r8a66597_write(r8a66597, info->pipe, PIPESEL);
245
246 if (info->dir_in)
247 pipecfg |= R8A66597_DIR;
248 pipecfg |= info->type;
249 pipecfg |= info->epnum;
250 switch (info->type) {
251 case R8A66597_INT:
252 bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
253 buf_bsize = 0;
254 break;
255 case R8A66597_BULK:
ef5ce3b6
MD		 256 /* isochronous pipes may be used as bulk pipes */
257 if (info->pipe > R8A66597_BASE_PIPENUM_BULK)
258 bufnum = info->pipe - R8A66597_BASE_PIPENUM_BULK;
259 else
260 bufnum = info->pipe - R8A66597_BASE_PIPENUM_ISOC;
261
262 bufnum = R8A66597_BASE_BUFNUM + (bufnum * 16);
c4144247
YS		 263 buf_bsize = 7;
264 pipecfg |= R8A66597_DBLB;
265 if (!info->dir_in)
266 pipecfg |= R8A66597_SHTNAK;
267 break;
268 case R8A66597_ISO:
ef5ce3b6 269 bufnum = R8A66597_BASE_BUFNUM +
c4144247 270 (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
c4144247
YS		 271 buf_bsize = 7;
272 break;
273 }
ef5ce3b6
MD		 274
275 if (buf_bsize && ((bufnum + 16) >= R8A66597_MAX_BUFNUM)) {
276 pr_err(KERN_ERR "r8a66597 pipe memory is insufficient\n");
c4144247
YS		 277 return -ENOMEM;
278 }
279
280 r8a66597_write(r8a66597, pipecfg, PIPECFG);
281 r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
282 r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
283 if (info->interval)
284 info->interval--;
285 r8a66597_write(r8a66597, info->interval, PIPEPERI);
286
287 return 0;
288}
289
290static void pipe_buffer_release(struct r8a66597 *r8a66597,
291 struct r8a66597_pipe_info *info)
292{
293 if (info->pipe == 0)
294 return;
295
c4144247
YS		 296 if (is_bulk_pipe(info->pipe))
297 r8a66597->bulk--;
298 else if (is_interrupt_pipe(info->pipe))
299 r8a66597->interrupt--;
300 else if (is_isoc_pipe(info->pipe)) {
301 r8a66597->isochronous--;
302 if (info->type == R8A66597_BULK)
303 r8a66597->bulk--;
304 } else
305 printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
306 info->pipe);
307}
308
309static void pipe_initialize(struct r8a66597_ep *ep)
310{
311 struct r8a66597 *r8a66597 = ep->r8a66597;
312
313 r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
314
315 r8a66597_write(r8a66597, ACLRM, ep->pipectr);
316 r8a66597_write(r8a66597, 0, ep->pipectr);
317 r8a66597_write(r8a66597, SQCLR, ep->pipectr);
318 if (ep->use_dma) {
319 r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
320
321 ndelay(450);
322
323 r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
324 }
325}
326
327static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
328 struct r8a66597_ep *ep,
329 const struct usb_endpoint_descriptor *desc,
330 u16 pipenum, int dma)
331{
332 ep->use_dma = 0;
333 ep->fifoaddr = CFIFO;
334 ep->fifosel = CFIFOSEL;
335 ep->fifoctr = CFIFOCTR;
336 ep->fifotrn = 0;
337
338 ep->pipectr = get_pipectr_addr(pipenum);
339 ep->pipenum = pipenum;
340 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
341 r8a66597->pipenum2ep[pipenum] = ep;
342 r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
343 = ep;
344 INIT_LIST_HEAD(&ep->queue);
345}
346
347static void r8a66597_ep_release(struct r8a66597_ep *ep)
348{
349 struct r8a66597 *r8a66597 = ep->r8a66597;
350 u16 pipenum = ep->pipenum;
351
352 if (pipenum == 0)
353 return;
354
355 if (ep->use_dma)
356 r8a66597->num_dma--;
357 ep->pipenum = 0;
358 ep->busy = 0;
359 ep->use_dma = 0;
360}
361
362static int alloc_pipe_config(struct r8a66597_ep *ep,
363 const struct usb_endpoint_descriptor *desc)
364{
365 struct r8a66597 *r8a66597 = ep->r8a66597;
366 struct r8a66597_pipe_info info;
367 int dma = 0;
368 unsigned char *counter;
369 int ret;
370
371 ep->desc = desc;
372
373 if (ep->pipenum) /* already allocated pipe */
374 return 0;
375
376 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
377 case USB_ENDPOINT_XFER_BULK:
378 if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
379 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
380 printk(KERN_ERR "bulk pipe is insufficient\n");
381 return -ENODEV;
382 } else {
383 info.pipe = R8A66597_BASE_PIPENUM_ISOC
384 + r8a66597->isochronous;
385 counter = &r8a66597->isochronous;
386 }
387 } else {
388 info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
389 counter = &r8a66597->bulk;
390 }
391 info.type = R8A66597_BULK;
392 dma = 1;
393 break;
394 case USB_ENDPOINT_XFER_INT:
395 if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
396 printk(KERN_ERR "interrupt pipe is insufficient\n");
397 return -ENODEV;
398 }
399 info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
400 info.type = R8A66597_INT;
401 counter = &r8a66597->interrupt;
402 break;
403 case USB_ENDPOINT_XFER_ISOC:
404 if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
405 printk(KERN_ERR "isochronous pipe is insufficient\n");
406 return -ENODEV;
407 }
408 info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
409 info.type = R8A66597_ISO;
410 counter = &r8a66597->isochronous;
411 break;
412 default:
413 printk(KERN_ERR "unexpect xfer type\n");
414 return -EINVAL;
415 }
416 ep->type = info.type;
417
418 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
419 info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
420 info.interval = desc->bInterval;
421 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
422 info.dir_in = 1;
423 else
424 info.dir_in = 0;
425
426 ret = pipe_buffer_setting(r8a66597, &info);
427 if (ret < 0) {
428 printk(KERN_ERR "pipe_buffer_setting fail\n");
429 return ret;
430 }
431
432 (*counter)++;
433 if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
434 r8a66597->bulk++;
435
436 r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
437 pipe_initialize(ep);
438
439 return 0;
440}
441
442static int free_pipe_config(struct r8a66597_ep *ep)
443{
444 struct r8a66597 *r8a66597 = ep->r8a66597;
445 struct r8a66597_pipe_info info;
446
447 info.pipe = ep->pipenum;
448 info.type = ep->type;
449 pipe_buffer_release(r8a66597, &info);
450 r8a66597_ep_release(ep);
451
452 return 0;
453}
454
455/*-------------------------------------------------------------------------*/
456static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
457{
458 enable_irq_ready(r8a66597, pipenum);
459 enable_irq_nrdy(r8a66597, pipenum);
460}
461
462static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
463{
464 disable_irq_ready(r8a66597, pipenum);
465 disable_irq_nrdy(r8a66597, pipenum);
466}
467
468/* if complete is true, gadget driver complete function is not call */
469static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
470{
471 r8a66597->ep[0].internal_ccpl = ccpl;
472 pipe_start(r8a66597, 0);
473 r8a66597_bset(r8a66597, CCPL, DCPCTR);
474}
475
476static void start_ep0_write(struct r8a66597_ep *ep,
477 struct r8a66597_request *req)
478{
479 struct r8a66597 *r8a66597 = ep->r8a66597;
480
481 pipe_change(r8a66597, ep->pipenum);
482 r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
483 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
484 if (req->req.length == 0) {
485 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
486 pipe_start(r8a66597, 0);
487 transfer_complete(ep, req, 0);
488 } else {
489 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
490 irq_ep0_write(ep, req);
491 }
492}
493
494static void start_packet_write(struct r8a66597_ep *ep,
495 struct r8a66597_request *req)
496{
497 struct r8a66597 *r8a66597 = ep->r8a66597;
498 u16 tmp;
499
500 pipe_change(r8a66597, ep->pipenum);
501 disable_irq_empty(r8a66597, ep->pipenum);
502 pipe_start(r8a66597, ep->pipenum);
503
504 tmp = r8a66597_read(r8a66597, ep->fifoctr);
505 if (unlikely((tmp & FRDY) == 0))
506 pipe_irq_enable(r8a66597, ep->pipenum);
507 else
508 irq_packet_write(ep, req);
509}
510
511static void start_packet_read(struct r8a66597_ep *ep,
512 struct r8a66597_request *req)
513{
514 struct r8a66597 *r8a66597 = ep->r8a66597;
515 u16 pipenum = ep->pipenum;
516
517 if (ep->pipenum == 0) {
518 r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
519 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
520 pipe_start(r8a66597, pipenum);
521 pipe_irq_enable(r8a66597, pipenum);
522 } else {
523 if (ep->use_dma) {
524 r8a66597_bset(r8a66597, TRCLR, ep->fifosel);
525 pipe_change(r8a66597, pipenum);
526 r8a66597_bset(r8a66597, TRENB, ep->fifosel);
527 r8a66597_write(r8a66597,
528 (req->req.length + ep->ep.maxpacket - 1)
529 / ep->ep.maxpacket,
530 ep->fifotrn);
531 }
532 pipe_start(r8a66597, pipenum); /* trigger once */
533 pipe_irq_enable(r8a66597, pipenum);
534 }
535}
536
537static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
538{
539 if (ep->desc->bEndpointAddress & USB_DIR_IN)
540 start_packet_write(ep, req);
541 else
542 start_packet_read(ep, req);
543}
544
545static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req)
546{
547 u16 ctsq;
548
549 ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
550
551 switch (ctsq) {
552 case CS_RDDS:
553 start_ep0_write(ep, req);
554 break;
555 case CS_WRDS:
556 start_packet_read(ep, req);
557 break;
558
559 case CS_WRND:
560 control_end(ep->r8a66597, 0);
561 break;
562 default:
563 printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
564 break;
565 }
566}
567
568static void init_controller(struct r8a66597 *r8a66597)
569{
570 u16 vif = r8a66597->pdata->vif ? LDRV : 0;
571 u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
572 u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
573
574 if (r8a66597->pdata->on_chip) {
575 r8a66597_bset(r8a66597, 0x04, SYSCFG1);
576 r8a66597_bset(r8a66597, HSE, SYSCFG0);
577
578 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
579 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
580 r8a66597_bset(r8a66597, USBE, SYSCFG0);
581
582 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
583
584 r8a66597_bset(r8a66597, irq_sense, INTENB1);
585 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
586 DMA0CFG);
587 } else {
588 r8a66597_bset(r8a66597, vif | endian, PINCFG);
589 r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
590 r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
591 XTAL, SYSCFG0);
592
593 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
594 r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
595 r8a66597_bset(r8a66597, USBE, SYSCFG0);
596
597 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
598
599 msleep(3);
600
601 r8a66597_bset(r8a66597, PLLC, SYSCFG0);
602
603 msleep(1);
604
605 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
606
607 r8a66597_bset(r8a66597, irq_sense, INTENB1);
608 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
609 DMA0CFG);
610 }
611}
612
613static void disable_controller(struct r8a66597 *r8a66597)
614{
615 if (r8a66597->pdata->on_chip) {
616 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
617
0bb886d2 618 /* disable interrupts */
c4144247
YS		 619 r8a66597_write(r8a66597, 0, INTENB0);
620 r8a66597_write(r8a66597, 0, INTENB1);
0bb886d2
MD		 621 r8a66597_write(r8a66597, 0, BRDYENB);
622 r8a66597_write(r8a66597, 0, BEMPENB);
623 r8a66597_write(r8a66597, 0, NRDYENB);
624
625 /* clear status */
626 r8a66597_write(r8a66597, 0, BRDYSTS);
627 r8a66597_write(r8a66597, 0, NRDYSTS);
628 r8a66597_write(r8a66597, 0, BEMPSTS);
c4144247
YS		 629
630 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
631 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
632
633 } else {
634 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
635 udelay(1);
636 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
637 udelay(1);
638 udelay(1);
639 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
640 }
641}
642
643static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
644{
645 u16 tmp;
646
647 if (!r8a66597->pdata->on_chip) {
648 tmp = r8a66597_read(r8a66597, SYSCFG0);
649 if (!(tmp & XCKE))
650 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
651 }
652}
653
654static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
655{
656 return list_entry(ep->queue.next, struct r8a66597_request, queue);
657}
658
659/*-------------------------------------------------------------------------*/
660static void transfer_complete(struct r8a66597_ep *ep,
661 struct r8a66597_request *req, int status)
662__releases(r8a66597->lock)
663__acquires(r8a66597->lock)
664{
665 int restart = 0;
666
667 if (unlikely(ep->pipenum == 0)) {
668 if (ep->internal_ccpl) {
669 ep->internal_ccpl = 0;
670 return;
671 }
672 }
673
674 list_del_init(&req->queue);
675 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
676 req->req.status = -ESHUTDOWN;
677 else
678 req->req.status = status;
679
680 if (!list_empty(&ep->queue))
681 restart = 1;
682
683 spin_unlock(&ep->r8a66597->lock);
684 req->req.complete(&ep->ep, &req->req);
685 spin_lock(&ep->r8a66597->lock);
686
687 if (restart) {
688 req = get_request_from_ep(ep);
689 if (ep->desc)
690 start_packet(ep, req);
691 }
692}
693
694static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
695{
696 int i;
697 u16 tmp;
698 unsigned bufsize;
699 size_t size;
700 void *buf;
701 u16 pipenum = ep->pipenum;
702 struct r8a66597 *r8a66597 = ep->r8a66597;
703
704 pipe_change(r8a66597, pipenum);
705 r8a66597_bset(r8a66597, ISEL, ep->fifosel);
706
707 i = 0;
708 do {
709 tmp = r8a66597_read(r8a66597, ep->fifoctr);
710 if (i++ > 100000) {
711 printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus"
712 "conflict. please power off this controller.");
713 return;
714 }
715 ndelay(1);
716 } while ((tmp & FRDY) == 0);
717
718 /* prepare parameters */
719 bufsize = get_buffer_size(r8a66597, pipenum);
720 buf = req->req.buf + req->req.actual;
721 size = min(bufsize, req->req.length - req->req.actual);
722
723 /* write fifo */
724 if (req->req.buf) {
725 if (size > 0)
726 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
727 if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
728 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
729 }
730
731 /* update parameters */
732 req->req.actual += size;
733
734 /* check transfer finish */
735 if ((!req->req.zero && (req->req.actual == req->req.length))
736 || (size % ep->ep.maxpacket)
737 || (size == 0)) {
738 disable_irq_ready(r8a66597, pipenum);
739 disable_irq_empty(r8a66597, pipenum);
740 } else {
741 disable_irq_ready(r8a66597, pipenum);
742 enable_irq_empty(r8a66597, pipenum);
743 }
744 pipe_start(r8a66597, pipenum);
745}
746
747static void irq_packet_write(struct r8a66597_ep *ep,
748 struct r8a66597_request *req)
749{
750 u16 tmp;
751 unsigned bufsize;
752 size_t size;
753 void *buf;
754 u16 pipenum = ep->pipenum;
755 struct r8a66597 *r8a66597 = ep->r8a66597;
756
757 pipe_change(r8a66597, pipenum);
758 tmp = r8a66597_read(r8a66597, ep->fifoctr);
759 if (unlikely((tmp & FRDY) == 0)) {
760 pipe_stop(r8a66597, pipenum);
761 pipe_irq_disable(r8a66597, pipenum);
762 printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
763 return;
764 }
765
766 /* prepare parameters */
767 bufsize = get_buffer_size(r8a66597, pipenum);
768 buf = req->req.buf + req->req.actual;
769 size = min(bufsize, req->req.length - req->req.actual);
770
771 /* write fifo */
772 if (req->req.buf) {
773 r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
774 if ((size == 0)
775 || ((size % ep->ep.maxpacket) != 0)
776 || ((bufsize != ep->ep.maxpacket)
777 && (bufsize > size)))
778 r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
779 }
780
781 /* update parameters */
782 req->req.actual += size;
783 /* check transfer finish */
784 if ((!req->req.zero && (req->req.actual == req->req.length))
785 || (size % ep->ep.maxpacket)
786 || (size == 0)) {
787 disable_irq_ready(r8a66597, pipenum);
788 enable_irq_empty(r8a66597, pipenum);
789 } else {
790 disable_irq_empty(r8a66597, pipenum);
791 pipe_irq_enable(r8a66597, pipenum);
792 }
793}
794
795static void irq_packet_read(struct r8a66597_ep *ep,
796 struct r8a66597_request *req)
797{
798 u16 tmp;
799 int rcv_len, bufsize, req_len;
800 int size;
801 void *buf;
802 u16 pipenum = ep->pipenum;
803 struct r8a66597 *r8a66597 = ep->r8a66597;
804 int finish = 0;
805
806 pipe_change(r8a66597, pipenum);
807 tmp = r8a66597_read(r8a66597, ep->fifoctr);
808 if (unlikely((tmp & FRDY) == 0)) {
809 req->req.status = -EPIPE;
810 pipe_stop(r8a66597, pipenum);
811 pipe_irq_disable(r8a66597, pipenum);
812 printk(KERN_ERR "read fifo not ready");
813 return;
814 }
815
816 /* prepare parameters */
817 rcv_len = tmp & DTLN;
818 bufsize = get_buffer_size(r8a66597, pipenum);
819
820 buf = req->req.buf + req->req.actual;
821 req_len = req->req.length - req->req.actual;
822 if (rcv_len < bufsize)
823 size = min(rcv_len, req_len);
824 else
825 size = min(bufsize, req_len);
826
827 /* update parameters */
828 req->req.actual += size;
829
830 /* check transfer finish */
831 if ((!req->req.zero && (req->req.actual == req->req.length))
832 || (size % ep->ep.maxpacket)
833 || (size == 0)) {
834 pipe_stop(r8a66597, pipenum);
835 pipe_irq_disable(r8a66597, pipenum);
836 finish = 1;
837 }
838
839 /* read fifo */
840 if (req->req.buf) {
841 if (size == 0)
842 r8a66597_write(r8a66597, BCLR, ep->fifoctr);
843 else
844 r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
845
846 }
847
848 if ((ep->pipenum != 0) && finish)
849 transfer_complete(ep, req, 0);
850}
851
852static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
853{
854 u16 check;
855 u16 pipenum;
856 struct r8a66597_ep *ep;
857 struct r8a66597_request *req;
858
859 if ((status & BRDY0) && (enb & BRDY0)) {
860 r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
861 r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
862
863 ep = &r8a66597->ep[0];
864 req = get_request_from_ep(ep);
865 irq_packet_read(ep, req);
866 } else {
867 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
868 check = 1 << pipenum;
869 if ((status & check) && (enb & check)) {
870 r8a66597_write(r8a66597, ~check, BRDYSTS);
871 ep = r8a66597->pipenum2ep[pipenum];
872 req = get_request_from_ep(ep);
873 if (ep->desc->bEndpointAddress & USB_DIR_IN)
874 irq_packet_write(ep, req);
875 else
876 irq_packet_read(ep, req);
877 }
878 }
879 }
880}
881
882static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
883{
884 u16 tmp;
885 u16 check;
886 u16 pipenum;
887 struct r8a66597_ep *ep;
888 struct r8a66597_request *req;
889
890 if ((status & BEMP0) && (enb & BEMP0)) {
891 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
892
893 ep = &r8a66597->ep[0];
894 req = get_request_from_ep(ep);
895 irq_ep0_write(ep, req);
896 } else {
897 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
898 check = 1 << pipenum;
899 if ((status & check) && (enb & check)) {
900 r8a66597_write(r8a66597, ~check, BEMPSTS);
901 tmp = control_reg_get(r8a66597, pipenum);
902 if ((tmp & INBUFM) == 0) {
903 disable_irq_empty(r8a66597, pipenum);
904 pipe_irq_disable(r8a66597, pipenum);
905 pipe_stop(r8a66597, pipenum);
906 ep = r8a66597->pipenum2ep[pipenum];
907 req = get_request_from_ep(ep);
908 if (!list_empty(&ep->queue))
909 transfer_complete(ep, req, 0);
910 }
911 }
912 }
913 }
914}
915
916static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
917__releases(r8a66597->lock)
918__acquires(r8a66597->lock)
919{
920 struct r8a66597_ep *ep;
921 u16 pid;
922 u16 status = 0;
923 u16 w_index = le16_to_cpu(ctrl->wIndex);
924
925 switch (ctrl->bRequestType & USB_RECIP_MASK) {
926 case USB_RECIP_DEVICE:
927 status = 1 << USB_DEVICE_SELF_POWERED;
928 break;
929 case USB_RECIP_INTERFACE:
930 status = 0;
931 break;
932 case USB_RECIP_ENDPOINT:
933 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
934 pid = control_reg_get_pid(r8a66597, ep->pipenum);
935 if (pid == PID_STALL)
936 status = 1 << USB_ENDPOINT_HALT;
937 else
938 status = 0;
939 break;
940 default:
941 pipe_stall(r8a66597, 0);
942 return; /* exit */
943 }
944
945 r8a66597->ep0_data = cpu_to_le16(status);
946 r8a66597->ep0_req->buf = &r8a66597->ep0_data;
947 r8a66597->ep0_req->length = 2;
948 /* AV: what happens if we get called again before that gets through? */
949 spin_unlock(&r8a66597->lock);
950 r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
951 spin_lock(&r8a66597->lock);
952}
953
954static void clear_feature(struct r8a66597 *r8a66597,
955 struct usb_ctrlrequest *ctrl)
956{
957 switch (ctrl->bRequestType & USB_RECIP_MASK) {
958 case USB_RECIP_DEVICE:
959 control_end(r8a66597, 1);
960 break;
961 case USB_RECIP_INTERFACE:
962 control_end(r8a66597, 1);
963 break;
964 case USB_RECIP_ENDPOINT: {
965 struct r8a66597_ep *ep;
966 struct r8a66597_request *req;
967 u16 w_index = le16_to_cpu(ctrl->wIndex);
968
969 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
9e7291c1
YS		 970 if (!ep->wedge) {
971 pipe_stop(r8a66597, ep->pipenum);
972 control_reg_sqclr(r8a66597, ep->pipenum);
973 spin_unlock(&r8a66597->lock);
974 usb_ep_clear_halt(&ep->ep);
975 spin_lock(&r8a66597->lock);
976 }
c4144247
YS		 977
978 control_end(r8a66597, 1);
979
980 req = get_request_from_ep(ep);
981 if (ep->busy) {
982 ep->busy = 0;
983 if (list_empty(&ep->queue))
984 break;
985 start_packet(ep, req);
986 } else if (!list_empty(&ep->queue))
987 pipe_start(r8a66597, ep->pipenum);
988 }
989 break;
990 default:
991 pipe_stall(r8a66597, 0);
992 break;
993 }
994}
995
996static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
997{
998
999 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1000 case USB_RECIP_DEVICE:
1001 control_end(r8a66597, 1);
1002 break;
1003 case USB_RECIP_INTERFACE:
1004 control_end(r8a66597, 1);
1005 break;
1006 case USB_RECIP_ENDPOINT: {
1007 struct r8a66597_ep *ep;
1008 u16 w_index = le16_to_cpu(ctrl->wIndex);
1009
1010 ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
1011 pipe_stall(r8a66597, ep->pipenum);
1012
1013 control_end(r8a66597, 1);
1014 }
1015 break;
1016 default:
1017 pipe_stall(r8a66597, 0);
1018 break;
1019 }
1020}
1021
1022/* if return value is true, call class driver's setup() */
1023static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
1024{
1025 u16 *p = (u16 *)ctrl;
1026 unsigned long offset = USBREQ;
1027 int i, ret = 0;
1028
1029 /* read fifo */
1030 r8a66597_write(r8a66597, ~VALID, INTSTS0);
1031
1032 for (i = 0; i < 4; i++)
1033 p[i] = r8a66597_read(r8a66597, offset + i*2);
1034
1035 /* check request */
1036 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1037 switch (ctrl->bRequest) {
1038 case USB_REQ_GET_STATUS:
1039 get_status(r8a66597, ctrl);
1040 break;
1041 case USB_REQ_CLEAR_FEATURE:
1042 clear_feature(r8a66597, ctrl);
1043 break;
1044 case USB_REQ_SET_FEATURE:
1045 set_feature(r8a66597, ctrl);
1046 break;
1047 default:
1048 ret = 1;
1049 break;
1050 }
1051 } else
1052 ret = 1;
1053 return ret;
1054}
1055
1056static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
1057{
1058 u16 speed = get_usb_speed(r8a66597);
1059
1060 switch (speed) {
1061 case HSMODE:
1062 r8a66597->gadget.speed = USB_SPEED_HIGH;
1063 break;
1064 case FSMODE:
1065 r8a66597->gadget.speed = USB_SPEED_FULL;
1066 break;
1067 default:
1068 r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
1069 printk(KERN_ERR "USB speed unknown\n");
1070 }
1071}
1072
1073static void irq_device_state(struct r8a66597 *r8a66597)
1074{
1075 u16 dvsq;
1076
1077 dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
1078 r8a66597_write(r8a66597, ~DVST, INTSTS0);
1079
1080 if (dvsq == DS_DFLT) {
1081 /* bus reset */
1082 r8a66597->driver->disconnect(&r8a66597->gadget);
1083 r8a66597_update_usb_speed(r8a66597);
1084 }
1085 if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
1086 r8a66597_update_usb_speed(r8a66597);
1087 if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
1088 && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1089 r8a66597_update_usb_speed(r8a66597);
1090
1091 r8a66597->old_dvsq = dvsq;
1092}
1093
1094static void irq_control_stage(struct r8a66597 *r8a66597)
1095__releases(r8a66597->lock)
1096__acquires(r8a66597->lock)
1097{
1098 struct usb_ctrlrequest ctrl;
1099 u16 ctsq;
1100
1101 ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
1102 r8a66597_write(r8a66597, ~CTRT, INTSTS0);
1103
1104 switch (ctsq) {
1105 case CS_IDST: {
1106 struct r8a66597_ep *ep;
1107 struct r8a66597_request *req;
1108 ep = &r8a66597->ep[0];
1109 req = get_request_from_ep(ep);
1110 transfer_complete(ep, req, 0);
1111 }
1112 break;
1113
1114 case CS_RDDS:
1115 case CS_WRDS:
1116 case CS_WRND:
1117 if (setup_packet(r8a66597, &ctrl)) {
1118 spin_unlock(&r8a66597->lock);
1119 if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
1120 < 0)
1121 pipe_stall(r8a66597, 0);
1122 spin_lock(&r8a66597->lock);
1123 }
1124 break;
1125 case CS_RDSS:
1126 case CS_WRSS:
1127 control_end(r8a66597, 0);
1128 break;
1129 default:
1130 printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
1131 break;
1132 }
1133}
1134
1135static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
1136{
1137 struct r8a66597 *r8a66597 = _r8a66597;
1138 u16 intsts0;
1139 u16 intenb0;
1140 u16 brdysts, nrdysts, bempsts;
1141 u16 brdyenb, nrdyenb, bempenb;
1142 u16 savepipe;
1143 u16 mask0;
1144
1145 spin_lock(&r8a66597->lock);
1146
1147 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1148 intenb0 = r8a66597_read(r8a66597, INTENB0);
1149
1150 savepipe = r8a66597_read(r8a66597, CFIFOSEL);
1151
1152 mask0 = intsts0 & intenb0;
1153 if (mask0) {
1154 brdysts = r8a66597_read(r8a66597, BRDYSTS);
1155 nrdysts = r8a66597_read(r8a66597, NRDYSTS);
1156 bempsts = r8a66597_read(r8a66597, BEMPSTS);
1157 brdyenb = r8a66597_read(r8a66597, BRDYENB);
1158 nrdyenb = r8a66597_read(r8a66597, NRDYENB);
1159 bempenb = r8a66597_read(r8a66597, BEMPENB);
1160
1161 if (mask0 & VBINT) {
1162 r8a66597_write(r8a66597, 0xffff & ~VBINT,
1163 INTSTS0);
1164 r8a66597_start_xclock(r8a66597);
1165
1166 /* start vbus sampling */
1167 r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
1168 & VBSTS;
1169 r8a66597->scount = R8A66597_MAX_SAMPLING;
1170
1171 mod_timer(&r8a66597->timer,
1172 jiffies + msecs_to_jiffies(50));
1173 }
1174 if (intsts0 & DVSQ)
1175 irq_device_state(r8a66597);
1176
1177 if ((intsts0 & BRDY) && (intenb0 & BRDYE)
1178 && (brdysts & brdyenb))
1179 irq_pipe_ready(r8a66597, brdysts, brdyenb);
1180 if ((intsts0 & BEMP) && (intenb0 & BEMPE)
1181 && (bempsts & bempenb))
1182 irq_pipe_empty(r8a66597, bempsts, bempenb);
1183
1184 if (intsts0 & CTRT)
1185 irq_control_stage(r8a66597);
1186 }
1187
1188 r8a66597_write(r8a66597, savepipe, CFIFOSEL);
1189
1190 spin_unlock(&r8a66597->lock);
1191 return IRQ_HANDLED;
1192}
1193
1194static void r8a66597_timer(unsigned long _r8a66597)
1195{
1196 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1197 unsigned long flags;
1198 u16 tmp;
1199
1200 spin_lock_irqsave(&r8a66597->lock, flags);
1201 tmp = r8a66597_read(r8a66597, SYSCFG0);
1202 if (r8a66597->scount > 0) {
1203 tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
1204 if (tmp == r8a66597->old_vbus) {
1205 r8a66597->scount--;
1206 if (r8a66597->scount == 0) {
1207 if (tmp == VBSTS)
1208 r8a66597_usb_connect(r8a66597);
1209 else
1210 r8a66597_usb_disconnect(r8a66597);
1211 } else {
1212 mod_timer(&r8a66597->timer,
1213 jiffies + msecs_to_jiffies(50));
1214 }
1215 } else {
1216 r8a66597->scount = R8A66597_MAX_SAMPLING;
1217 r8a66597->old_vbus = tmp;
1218 mod_timer(&r8a66597->timer,
1219 jiffies + msecs_to_jiffies(50));
1220 }
1221 }
1222 spin_unlock_irqrestore(&r8a66597->lock, flags);
1223}
1224
1225/*-------------------------------------------------------------------------*/
1226static int r8a66597_enable(struct usb_ep *_ep,
1227 const struct usb_endpoint_descriptor *desc)
1228{
1229 struct r8a66597_ep *ep;
1230
1231 ep = container_of(_ep, struct r8a66597_ep, ep);
1232 return alloc_pipe_config(ep, desc);
1233}
1234
1235static int r8a66597_disable(struct usb_ep *_ep)
1236{
1237 struct r8a66597_ep *ep;
1238 struct r8a66597_request *req;
1239 unsigned long flags;
1240
1241 ep = container_of(_ep, struct r8a66597_ep, ep);
1242 BUG_ON(!ep);
1243
1244 while (!list_empty(&ep->queue)) {
1245 req = get_request_from_ep(ep);
1246 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1247 transfer_complete(ep, req, -ECONNRESET);
1248 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1249 }
1250
1251 pipe_irq_disable(ep->r8a66597, ep->pipenum);
1252 return free_pipe_config(ep);
1253}
1254
1255static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
1256 gfp_t gfp_flags)
1257{
1258 struct r8a66597_request *req;
1259
1260 req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
1261 if (!req)
1262 return NULL;
1263
1264 INIT_LIST_HEAD(&req->queue);
1265
1266 return &req->req;
1267}
1268
1269static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
1270{
1271 struct r8a66597_request *req;
1272
1273 req = container_of(_req, struct r8a66597_request, req);
1274 kfree(req);
1275}
1276
1277static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
1278 gfp_t gfp_flags)
1279{
1280 struct r8a66597_ep *ep;
1281 struct r8a66597_request *req;
1282 unsigned long flags;
1283 int request = 0;
1284
1285 ep = container_of(_ep, struct r8a66597_ep, ep);
1286 req = container_of(_req, struct r8a66597_request, req);
1287
1288 if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
1289 return -ESHUTDOWN;
1290
1291 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1292
1293 if (list_empty(&ep->queue))
1294 request = 1;
1295
1296 list_add_tail(&req->queue, &ep->queue);
1297 req->req.actual = 0;
1298 req->req.status = -EINPROGRESS;
1299
1300 if (ep->desc == NULL) /* control */
1301 start_ep0(ep, req);
1302 else {
1303 if (request && !ep->busy)
1304 start_packet(ep, req);
1305 }
1306
1307 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1308
1309 return 0;
1310}
1311
1312static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1313{
1314 struct r8a66597_ep *ep;
1315 struct r8a66597_request *req;
1316 unsigned long flags;
1317
1318 ep = container_of(_ep, struct r8a66597_ep, ep);
1319 req = container_of(_req, struct r8a66597_request, req);
1320
1321 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1322 if (!list_empty(&ep->queue))
1323 transfer_complete(ep, req, -ECONNRESET);
1324 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1325
1326 return 0;
1327}
1328
1329static int r8a66597_set_halt(struct usb_ep *_ep, int value)
1330{
1331 struct r8a66597_ep *ep;
1332 struct r8a66597_request *req;
1333 unsigned long flags;
1334 int ret = 0;
1335
1336 ep = container_of(_ep, struct r8a66597_ep, ep);
1337 req = get_request_from_ep(ep);
1338
1339 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1340 if (!list_empty(&ep->queue)) {
1341 ret = -EAGAIN;
1342 goto out;
1343 }
1344 if (value) {
1345 ep->busy = 1;
1346 pipe_stall(ep->r8a66597, ep->pipenum);
1347 } else {
1348 ep->busy = 0;
9e7291c1 1349 ep->wedge = 0;
c4144247
YS		 1350 pipe_stop(ep->r8a66597, ep->pipenum);
1351 }
1352
1353out:
1354 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1355 return ret;
1356}
1357
9e7291c1
YS		 1358static int r8a66597_set_wedge(struct usb_ep *_ep)
1359{
1360 struct r8a66597_ep *ep;
1361 unsigned long flags;
1362
1363 ep = container_of(_ep, struct r8a66597_ep, ep);
1364
1365 if (!ep || !ep->desc)
1366 return -EINVAL;
1367
1368 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1369 ep->wedge = 1;
1370 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1371
1372 return usb_ep_set_halt(_ep);
1373}
1374
c4144247
YS		 1375static void r8a66597_fifo_flush(struct usb_ep *_ep)
1376{
1377 struct r8a66597_ep *ep;
1378 unsigned long flags;
1379
1380 ep = container_of(_ep, struct r8a66597_ep, ep);
1381 spin_lock_irqsave(&ep->r8a66597->lock, flags);
1382 if (list_empty(&ep->queue) && !ep->busy) {
1383 pipe_stop(ep->r8a66597, ep->pipenum);
1384 r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
1385 }
1386 spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
1387}
1388
1389static struct usb_ep_ops r8a66597_ep_ops = {
1390 .enable = r8a66597_enable,
1391 .disable = r8a66597_disable,
1392
1393 .alloc_request = r8a66597_alloc_request,
1394 .free_request = r8a66597_free_request,
1395
1396 .queue = r8a66597_queue,
1397 .dequeue = r8a66597_dequeue,
1398
1399 .set_halt = r8a66597_set_halt,
9e7291c1 1400 .set_wedge = r8a66597_set_wedge,
c4144247
YS		 1401 .fifo_flush = r8a66597_fifo_flush,
1402};
1403
1404/*-------------------------------------------------------------------------*/
1405static struct r8a66597 *the_controller;
1406
1407int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1408{
1409 struct r8a66597 *r8a66597 = the_controller;
1410 int retval;
1411
1412 if (!driver
1413 || driver->speed != USB_SPEED_HIGH
1414 || !driver->bind
1415 || !driver->setup)
1416 return -EINVAL;
1417 if (!r8a66597)
1418 return -ENODEV;
1419 if (r8a66597->driver)
1420 return -EBUSY;
1421
1422 /* hook up the driver */
1423 driver->driver.bus = NULL;
1424 r8a66597->driver = driver;
1425 r8a66597->gadget.dev.driver = &driver->driver;
1426
1427 retval = device_add(&r8a66597->gadget.dev);
1428 if (retval) {
1429 printk(KERN_ERR "device_add error (%d)\n", retval);
1430 goto error;
1431 }
1432
1433 retval = driver->bind(&r8a66597->gadget);
1434 if (retval) {
1435 printk(KERN_ERR "bind to driver error (%d)\n", retval);
1436 device_del(&r8a66597->gadget.dev);
1437 goto error;
1438 }
1439
1440 r8a66597_bset(r8a66597, VBSE, INTENB0);
1441 if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
1442 r8a66597_start_xclock(r8a66597);
1443 /* start vbus sampling */
1444 r8a66597->old_vbus = r8a66597_read(r8a66597,
1445 INTSTS0) & VBSTS;
1446 r8a66597->scount = R8A66597_MAX_SAMPLING;
1447 mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
1448 }
1449
1450 return 0;
1451
1452error:
1453 r8a66597->driver = NULL;
1454 r8a66597->gadget.dev.driver = NULL;
1455
1456 return retval;
1457}
1458EXPORT_SYMBOL(usb_gadget_register_driver);
1459
1460int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1461{
1462 struct r8a66597 *r8a66597 = the_controller;
1463 unsigned long flags;
1464
1465 if (driver != r8a66597->driver || !driver->unbind)
1466 return -EINVAL;
1467
1468 spin_lock_irqsave(&r8a66597->lock, flags);
1469 if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
1470 r8a66597_usb_disconnect(r8a66597);
1471 spin_unlock_irqrestore(&r8a66597->lock, flags);
1472
1473 r8a66597_bclr(r8a66597, VBSE, INTENB0);
1474
1475 driver->unbind(&r8a66597->gadget);
1476
1477 init_controller(r8a66597);
1478 disable_controller(r8a66597);
1479
1480 device_del(&r8a66597->gadget.dev);
1481 r8a66597->driver = NULL;
1482 return 0;
1483}
1484EXPORT_SYMBOL(usb_gadget_unregister_driver);
1485
1486/*-------------------------------------------------------------------------*/
1487static int r8a66597_get_frame(struct usb_gadget *_gadget)
1488{
1489 struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
1490 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1491}
1492
1493static struct usb_gadget_ops r8a66597_gadget_ops = {
1494 .get_frame = r8a66597_get_frame,
1495};
1496
1497static int __exit r8a66597_remove(struct platform_device *pdev)
1498{
1499 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
1500
1501 del_timer_sync(&r8a66597->timer);
1502 iounmap((void *)r8a66597->reg);
1503 free_irq(platform_get_irq(pdev, 0), r8a66597);
1504 r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
d2e27bdf
MD		 1505#ifdef CONFIG_HAVE_CLK
1506 if (r8a66597->pdata->on_chip) {
1507 clk_disable(r8a66597->clk);
1508 clk_put(r8a66597->clk);
1509 }
1510#endif
c4144247
YS		 1511 kfree(r8a66597);
1512 return 0;
1513}
1514
1515static void nop_completion(struct usb_ep *ep, struct usb_request *r)
1516{
1517}
1518
1519static int __init r8a66597_probe(struct platform_device *pdev)
1520{
d2e27bdf
MD		 1521#ifdef CONFIG_HAVE_CLK
1522 char clk_name[8];
1523#endif
c4144247
YS		 1524 struct resource *res, *ires;
1525 int irq;
1526 void __iomem *reg = NULL;
1527 struct r8a66597 *r8a66597 = NULL;
1528 int ret = 0;
1529 int i;
1530 unsigned long irq_trigger;
1531
1532 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1533 if (!res) {
1534 ret = -ENODEV;
1535 printk(KERN_ERR "platform_get_resource error.\n");
1536 goto clean_up;
1537 }
1538
1539 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1540 irq = ires->start;
1541 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
1542
1543 if (irq < 0) {
1544 ret = -ENODEV;
1545 printk(KERN_ERR "platform_get_irq error.\n");
1546 goto clean_up;
1547 }
1548
1549 reg = ioremap(res->start, resource_size(res));
1550 if (reg == NULL) {
1551 ret = -ENOMEM;
1552 printk(KERN_ERR "ioremap error.\n");
1553 goto clean_up;
1554 }
1555
1556 /* initialize ucd */
1557 r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
1558 if (r8a66597 == NULL) {
1559 printk(KERN_ERR "kzalloc error\n");
1560 goto clean_up;
1561 }
1562
1563 spin_lock_init(&r8a66597->lock);
1564 dev_set_drvdata(&pdev->dev, r8a66597);
1565 r8a66597->pdata = pdev->dev.platform_data;
1566 r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
1567
1568 r8a66597->gadget.ops = &r8a66597_gadget_ops;
1569 device_initialize(&r8a66597->gadget.dev);
1570 dev_set_name(&r8a66597->gadget.dev, "gadget");
1571 r8a66597->gadget.is_dualspeed = 1;
1572 r8a66597->gadget.dev.parent = &pdev->dev;
1573 r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
1574 r8a66597->gadget.dev.release = pdev->dev.release;
1575 r8a66597->gadget.name = udc_name;
1576
1577 init_timer(&r8a66597->timer);
1578 r8a66597->timer.function = r8a66597_timer;
1579 r8a66597->timer.data = (unsigned long)r8a66597;
1580 r8a66597->reg = (unsigned long)reg;
1581
d2e27bdf
MD		 1582#ifdef CONFIG_HAVE_CLK
1583 if (r8a66597->pdata->on_chip) {
1584 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
1585 r8a66597->clk = clk_get(&pdev->dev, clk_name);
1586 if (IS_ERR(r8a66597->clk)) {
1587 dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
1588 clk_name);
1589 ret = PTR_ERR(r8a66597->clk);
1590 goto clean_up;
1591 }
1592 clk_enable(r8a66597->clk);
1593 }
1594#endif
1595
c4144247
YS		 1596 disable_controller(r8a66597); /* make sure controller is disabled */
1597
1598 ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
1599 udc_name, r8a66597);
1600 if (ret < 0) {
1601 printk(KERN_ERR "request_irq error (%d)\n", ret);
d2e27bdf 1602 goto clean_up2;
c4144247
YS		 1603 }
1604
1605 INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
1606 r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
1607 INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
1608 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
1609 struct r8a66597_ep *ep = &r8a66597->ep[i];
1610
1611 if (i != 0) {
1612 INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
1613 list_add_tail(&r8a66597->ep[i].ep.ep_list,
1614 &r8a66597->gadget.ep_list);
1615 }
1616 ep->r8a66597 = r8a66597;
1617 INIT_LIST_HEAD(&ep->queue);
1618 ep->ep.name = r8a66597_ep_name[i];
1619 ep->ep.ops = &r8a66597_ep_ops;
1620 ep->ep.maxpacket = 512;
1621 }
1622 r8a66597->ep[0].ep.maxpacket = 64;
1623 r8a66597->ep[0].pipenum = 0;
1624 r8a66597->ep[0].fifoaddr = CFIFO;
1625 r8a66597->ep[0].fifosel = CFIFOSEL;
1626 r8a66597->ep[0].fifoctr = CFIFOCTR;
1627 r8a66597->ep[0].fifotrn = 0;
1628 r8a66597->ep[0].pipectr = get_pipectr_addr(0);
1629 r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
1630 r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
1631
1632 the_controller = r8a66597;
1633
1634 r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
1635 GFP_KERNEL);
1636 if (r8a66597->ep0_req == NULL)
d2e27bdf 1637 goto clean_up3;
c4144247
YS		 1638 r8a66597->ep0_req->complete = nop_completion;
1639
1640 init_controller(r8a66597);
1641
1642 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1643 return 0;
1644
d2e27bdf 1645clean_up3:
c4144247 1646 free_irq(irq, r8a66597);
d2e27bdf
MD		 1647clean_up2:
1648#ifdef CONFIG_HAVE_CLK
1649 if (r8a66597->pdata->on_chip) {
1650 clk_disable(r8a66597->clk);
1651 clk_put(r8a66597->clk);
1652 }
1653#endif
c4144247
YS		 1654clean_up:
1655 if (r8a66597) {
1656 if (r8a66597->ep0_req)
1657 r8a66597_free_request(&r8a66597->ep[0].ep,
1658 r8a66597->ep0_req);
1659 kfree(r8a66597);
1660 }
1661 if (reg)
1662 iounmap(reg);
1663
1664 return ret;
1665}
1666
1667/*-------------------------------------------------------------------------*/
1668static struct platform_driver r8a66597_driver = {
1669 .remove = __exit_p(r8a66597_remove),
1670 .driver = {
1671 .name = (char *) udc_name,
1672 },
1673};
1674
1675static int __init r8a66597_udc_init(void)
1676{
1677 return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
1678}
1679module_init(r8a66597_udc_init);
1680
1681static void __exit r8a66597_udc_cleanup(void)
1682{
1683 platform_driver_unregister(&r8a66597_driver);
1684}
1685module_exit(r8a66597_udc_cleanup);
1686
1687MODULE_DESCRIPTION("R8A66597 USB gadget driver");
1688MODULE_LICENSE("GPL");
1689MODULE_AUTHOR("Yoshihiro Shimoda");
1690
Linux 6.x block layer and io_uring tree(s)