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ARC: [plat-eznps] spinlock aware for MTM
[linux/fpc-iii.git] / drivers / usb / renesas_usbhs / mod_gadget.c
blob2c8161bcf5b5e22ee8ed2eb413d29fdfde504e95
1 /*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 #include <linux/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/io.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/usb/ch9.h>
23 #include <linux/usb/gadget.h>
24 #include <linux/usb/otg.h>
25 #include "common.h"
26
27 /*
28 * struct
29 */
30 struct usbhsg_request {
31 struct usb_request req;
32 struct usbhs_pkt pkt;
33 };
34
35 #define EP_NAME_SIZE 8
36 struct usbhsg_gpriv;
37 struct usbhsg_uep {
38 struct usb_ep ep;
39 struct usbhs_pipe *pipe;
40 spinlock_t lock; /* protect the pipe */
41
42 char ep_name[EP_NAME_SIZE];
43
44 struct usbhsg_gpriv *gpriv;
45 };
46
47 struct usbhsg_gpriv {
48 struct usb_gadget gadget;
49 struct usbhs_mod mod;
50
51 struct usbhsg_uep *uep;
52 int uep_size;
53
54 struct usb_gadget_driver *driver;
55 struct usb_phy *transceiver;
56 bool vbus_active;
57
58 u32 status;
59 #define USBHSG_STATUS_STARTED (1 << 0)
60 #define USBHSG_STATUS_REGISTERD (1 << 1)
61 #define USBHSG_STATUS_WEDGE (1 << 2)
62 #define USBHSG_STATUS_SELF_POWERED (1 << 3)
63 #define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
64 };
65
66 struct usbhsg_recip_handle {
67 char *name;
68 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
69 struct usb_ctrlrequest *ctrl);
70 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
71 struct usb_ctrlrequest *ctrl);
72 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
73 struct usb_ctrlrequest *ctrl);
74 };
75
76 /*
77 * macro
78 */
79 #define usbhsg_priv_to_gpriv(priv) \
80 container_of( \
81 usbhs_mod_get(priv, USBHS_GADGET), \
82 struct usbhsg_gpriv, mod)
83
84 #define __usbhsg_for_each_uep(start, pos, g, i) \
85 for ((i) = start; \
86 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
87 (i)++)
88
89 #define usbhsg_for_each_uep(pos, gpriv, i) \
90 __usbhsg_for_each_uep(1, pos, gpriv, i)
91
92 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
93 __usbhsg_for_each_uep(0, pos, gpriv, i)
94
95 #define usbhsg_gadget_to_gpriv(g)\
96 container_of(g, struct usbhsg_gpriv, gadget)
97
98 #define usbhsg_req_to_ureq(r)\
99 container_of(r, struct usbhsg_request, req)
100
101 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
102 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
103 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
104 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
105 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
106 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
107 #define usbhsg_uep_to_pipe(u) ((u)->pipe)
108 #define usbhsg_pipe_to_uep(p) ((p)->mod_private)
109 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
110
111 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
112 #define usbhsg_pkt_to_ureq(i) \
113 container_of(i, struct usbhsg_request, pkt)
114
115 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
116
117 /* status */
118 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
119 #define usbhsg_status_set(gp, b) (gp->status |= b)
120 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
121 #define usbhsg_status_has(gp, b) (gp->status & b)
122
123 /*
124 * queue push/pop
125 */
126 static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
127 struct usbhsg_request *ureq,
128 int status)
129 {
130 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
131 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
132 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
133 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
134
135 if (pipe)
136 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
137
138 ureq->req.status = status;
139 spin_unlock(usbhs_priv_to_lock(priv));
140 usb_gadget_giveback_request(&uep->ep, &ureq->req);
141 spin_lock(usbhs_priv_to_lock(priv));
142 }
143
144 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
145 struct usbhsg_request *ureq,
146 int status)
147 {
148 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
149 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
150 unsigned long flags;
151
152 usbhs_lock(priv, flags);
153 __usbhsg_queue_pop(uep, ureq, status);
154 usbhs_unlock(priv, flags);
155 }
156
157 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
158 {
159 struct usbhs_pipe *pipe = pkt->pipe;
160 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
161 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
162 unsigned long flags;
163
164 ureq->req.actual = pkt->actual;
165
166 usbhs_lock(priv, flags);
167 if (uep)
168 __usbhsg_queue_pop(uep, ureq, 0);
169 usbhs_unlock(priv, flags);
170 }
171
172 static void usbhsg_queue_push(struct usbhsg_uep *uep,
173 struct usbhsg_request *ureq)
174 {
175 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
176 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
177 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
178 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
179 struct usb_request *req = &ureq->req;
180
181 req->actual = 0;
182 req->status = -EINPROGRESS;
183 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
184 req->buf, req->length, req->zero, -1);
185 usbhs_pkt_start(pipe);
186
187 dev_dbg(dev, "pipe %d : queue push (%d)\n",
188 usbhs_pipe_number(pipe),
189 req->length);
190 }
191
192 /*
193 * dma map/unmap
194 */
195 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
196 int map)
197 {
198 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
199 struct usb_request *req = &ureq->req;
200 struct usbhs_pipe *pipe = pkt->pipe;
201 enum dma_data_direction dir;
202 int ret = 0;
203
204 dir = usbhs_pipe_is_dir_host(pipe);
205
206 if (map) {
207 /* it can not use scatter/gather */
208 WARN_ON(req->num_sgs);
209
210 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
211 if (ret < 0)
212 return ret;
213
214 pkt->dma = req->dma;
215 } else {
216 usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
217 }
218
219 return ret;
220 }
221
222 /*
223 * USB_TYPE_STANDARD / clear feature functions
224 */
225 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
226 struct usbhsg_uep *uep,
227 struct usb_ctrlrequest *ctrl)
228 {
229 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
230 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
231 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
232
233 usbhs_dcp_control_transfer_done(pipe);
234
235 return 0;
236 }
237
238 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
239 struct usbhsg_uep *uep,
240 struct usb_ctrlrequest *ctrl)
241 {
242 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
243 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
244
245 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
246 usbhs_pipe_disable(pipe);
247 usbhs_pipe_sequence_data0(pipe);
248 usbhs_pipe_enable(pipe);
249 }
250
251 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
252
253 usbhs_pkt_start(pipe);
254
255 return 0;
256 }
257
258 static struct usbhsg_recip_handle req_clear_feature = {
259 .name = "clear feature",
260 .device = usbhsg_recip_handler_std_control_done,
261 .interface = usbhsg_recip_handler_std_control_done,
262 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
263 };
264
265 /*
266 * USB_TYPE_STANDARD / set feature functions
267 */
268 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
269 struct usbhsg_uep *uep,
270 struct usb_ctrlrequest *ctrl)
271 {
272 switch (le16_to_cpu(ctrl->wValue)) {
273 case USB_DEVICE_TEST_MODE:
274 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
275 udelay(100);
276 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
277 break;
278 default:
279 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
280 break;
281 }
282
283 return 0;
284 }
285
286 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
287 struct usbhsg_uep *uep,
288 struct usb_ctrlrequest *ctrl)
289 {
290 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
291
292 usbhs_pipe_stall(pipe);
293
294 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
295
296 return 0;
297 }
298
299 static struct usbhsg_recip_handle req_set_feature = {
300 .name = "set feature",
301 .device = usbhsg_recip_handler_std_set_device,
302 .interface = usbhsg_recip_handler_std_control_done,
303 .endpoint = usbhsg_recip_handler_std_set_endpoint,
304 };
305
306 /*
307 * USB_TYPE_STANDARD / get status functions
308 */
309 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
310 struct usb_request *req)
311 {
312 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
313
314 /* free allocated recip-buffer/usb_request */
315 kfree(ureq->pkt.buf);
316 usb_ep_free_request(ep, req);
317 }
318
319 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
320 unsigned short status)
321 {
322 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
323 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
324 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
325 struct usb_request *req;
326 unsigned short *buf;
327
328 /* alloc new usb_request for recip */
329 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
330 if (!req) {
331 dev_err(dev, "recip request allocation fail\n");
332 return;
333 }
334
335 /* alloc recip data buffer */
336 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
337 if (!buf) {
338 usb_ep_free_request(&dcp->ep, req);
339 return;
340 }
341
342 /* recip data is status */
343 *buf = cpu_to_le16(status);
344
345 /* allocated usb_request/buffer will be freed */
346 req->complete = __usbhsg_recip_send_complete;
347 req->buf = buf;
348 req->length = sizeof(*buf);
349 req->zero = 0;
350
351 /* push packet */
352 pipe->handler = &usbhs_fifo_pio_push_handler;
353 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
354 }
355
356 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
357 struct usbhsg_uep *uep,
358 struct usb_ctrlrequest *ctrl)
359 {
360 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
361 unsigned short status = 0;
362
363 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
364 status = 1 << USB_DEVICE_SELF_POWERED;
365
366 __usbhsg_recip_send_status(gpriv, status);
367
368 return 0;
369 }
370
371 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
372 struct usbhsg_uep *uep,
373 struct usb_ctrlrequest *ctrl)
374 {
375 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
376 unsigned short status = 0;
377
378 __usbhsg_recip_send_status(gpriv, status);
379
380 return 0;
381 }
382
383 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
384 struct usbhsg_uep *uep,
385 struct usb_ctrlrequest *ctrl)
386 {
387 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
388 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
389 unsigned short status = 0;
390
391 if (usbhs_pipe_is_stall(pipe))
392 status = 1 << USB_ENDPOINT_HALT;
393
394 __usbhsg_recip_send_status(gpriv, status);
395
396 return 0;
397 }
398
399 static struct usbhsg_recip_handle req_get_status = {
400 .name = "get status",
401 .device = usbhsg_recip_handler_std_get_device,
402 .interface = usbhsg_recip_handler_std_get_interface,
403 .endpoint = usbhsg_recip_handler_std_get_endpoint,
404 };
405
406 /*
407 * USB_TYPE handler
408 */
409 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
410 struct usbhsg_recip_handle *handler,
411 struct usb_ctrlrequest *ctrl)
412 {
413 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
414 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
415 struct usbhsg_uep *uep;
416 struct usbhs_pipe *pipe;
417 int recip = ctrl->bRequestType & USB_RECIP_MASK;
418 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
419 int ret = 0;
420 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
421 struct usb_ctrlrequest *ctrl);
422 char *msg;
423
424 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
425 pipe = usbhsg_uep_to_pipe(uep);
426 if (!pipe) {
427 dev_err(dev, "wrong recip request\n");
428 return -EINVAL;
429 }
430
431 switch (recip) {
432 case USB_RECIP_DEVICE:
433 msg = "DEVICE";
434 func = handler->device;
435 break;
436 case USB_RECIP_INTERFACE:
437 msg = "INTERFACE";
438 func = handler->interface;
439 break;
440 case USB_RECIP_ENDPOINT:
441 msg = "ENDPOINT";
442 func = handler->endpoint;
443 break;
444 default:
445 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
446 func = NULL;
447 ret = -EINVAL;
448 }
449
450 if (func) {
451 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
452 ret = func(priv, uep, ctrl);
453 }
454
455 return ret;
456 }
457
458 /*
459 * irq functions
460 *
461 * it will be called from usbhs_interrupt
462 */
463 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
464 struct usbhs_irq_state *irq_state)
465 {
466 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
467 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
468
469 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
470
471 dev_dbg(dev, "state = %x : speed : %d\n",
472 usbhs_status_get_device_state(irq_state),
473 gpriv->gadget.speed);
474
475 return 0;
476 }
477
478 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
479 struct usbhs_irq_state *irq_state)
480 {
481 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
482 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
483 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
484 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
485 struct usb_ctrlrequest ctrl;
486 struct usbhsg_recip_handle *recip_handler = NULL;
487 int stage = usbhs_status_get_ctrl_stage(irq_state);
488 int ret = 0;
489
490 dev_dbg(dev, "stage = %d\n", stage);
491
492 /*
493 * see Manual
494 *
495 * "Operation"
496 * - "Interrupt Function"
497 * - "Control Transfer Stage Transition Interrupt"
498 * - Fig. "Control Transfer Stage Transitions"
499 */
500
501 switch (stage) {
502 case READ_DATA_STAGE:
503 pipe->handler = &usbhs_fifo_pio_push_handler;
504 break;
505 case WRITE_DATA_STAGE:
506 pipe->handler = &usbhs_fifo_pio_pop_handler;
507 break;
508 case NODATA_STATUS_STAGE:
509 pipe->handler = &usbhs_ctrl_stage_end_handler;
510 break;
511 case READ_STATUS_STAGE:
512 case WRITE_STATUS_STAGE:
513 usbhs_dcp_control_transfer_done(pipe);
514 default:
515 return ret;
516 }
517
518 /*
519 * get usb request
520 */
521 usbhs_usbreq_get_val(priv, &ctrl);
522
523 switch (ctrl.bRequestType & USB_TYPE_MASK) {
524 case USB_TYPE_STANDARD:
525 switch (ctrl.bRequest) {
526 case USB_REQ_CLEAR_FEATURE:
527 recip_handler = &req_clear_feature;
528 break;
529 case USB_REQ_SET_FEATURE:
530 recip_handler = &req_set_feature;
531 break;
532 case USB_REQ_GET_STATUS:
533 recip_handler = &req_get_status;
534 break;
535 }
536 }
537
538 /*
539 * setup stage / run recip
540 */
541 if (recip_handler)
542 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
543 else
544 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
545
546 if (ret < 0)
547 usbhs_pipe_stall(pipe);
548
549 return ret;
550 }
551
552 /*
553 *
554 * usb_dcp_ops
555 *
556 */
557 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
558 {
559 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
560 struct usbhs_pkt *pkt;
561
562 while (1) {
563 pkt = usbhs_pkt_pop(pipe, NULL);
564 if (!pkt)
565 break;
566
567 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
568 }
569
570 usbhs_pipe_disable(pipe);
571
572 return 0;
573 }
574
575 /*
576 *
577 * usb_ep_ops
578 *
579 */
580 static int usbhsg_ep_enable(struct usb_ep *ep,
581 const struct usb_endpoint_descriptor *desc)
582 {
583 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
584 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
585 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
586 struct usbhs_pipe *pipe;
587 int ret = -EIO;
588 unsigned long flags;
589
590 usbhs_lock(priv, flags);
591
592 /*
593 * if it already have pipe,
594 * nothing to do
595 */
596 if (uep->pipe) {
597 usbhs_pipe_clear(uep->pipe);
598 usbhs_pipe_sequence_data0(uep->pipe);
599 ret = 0;
600 goto usbhsg_ep_enable_end;
601 }
602
603 pipe = usbhs_pipe_malloc(priv,
604 usb_endpoint_type(desc),
605 usb_endpoint_dir_in(desc));
606 if (pipe) {
607 uep->pipe = pipe;
608 pipe->mod_private = uep;
609
610 /* set epnum / maxp */
611 usbhs_pipe_config_update(pipe, 0,
612 usb_endpoint_num(desc),
613 usb_endpoint_maxp(desc));
614
615 /*
616 * usbhs_fifo_dma_push/pop_handler try to
617 * use dmaengine if possible.
618 * It will use pio handler if impossible.
619 */
620 if (usb_endpoint_dir_in(desc)) {
621 pipe->handler = &usbhs_fifo_dma_push_handler;
622 } else {
623 pipe->handler = &usbhs_fifo_dma_pop_handler;
624 usbhs_xxxsts_clear(priv, BRDYSTS,
625 usbhs_pipe_number(pipe));
626 }
627
628 ret = 0;
629 }
630
631 usbhsg_ep_enable_end:
632 usbhs_unlock(priv, flags);
633
634 return ret;
635 }
636
637 static int usbhsg_ep_disable(struct usb_ep *ep)
638 {
639 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
640 struct usbhs_pipe *pipe;
641 unsigned long flags;
642
643 spin_lock_irqsave(&uep->lock, flags);
644 pipe = usbhsg_uep_to_pipe(uep);
645 if (!pipe)
646 goto out;
647
648 usbhsg_pipe_disable(uep);
649 usbhs_pipe_free(pipe);
650
651 uep->pipe->mod_private = NULL;
652 uep->pipe = NULL;
653
654 out:
655 spin_unlock_irqrestore(&uep->lock, flags);
656
657 return 0;
658 }
659
660 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
661 gfp_t gfp_flags)
662 {
663 struct usbhsg_request *ureq;
664
665 ureq = kzalloc(sizeof *ureq, gfp_flags);
666 if (!ureq)
667 return NULL;
668
669 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
670
671 return &ureq->req;
672 }
673
674 static void usbhsg_ep_free_request(struct usb_ep *ep,
675 struct usb_request *req)
676 {
677 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
678
679 WARN_ON(!list_empty(&ureq->pkt.node));
680 kfree(ureq);
681 }
682
683 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
684 gfp_t gfp_flags)
685 {
686 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
687 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
688 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
689 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
690
691 /* param check */
692 if (usbhsg_is_not_connected(gpriv) ||
693 unlikely(!gpriv->driver) ||
694 unlikely(!pipe))
695 return -ESHUTDOWN;
696
697 usbhsg_queue_push(uep, ureq);
698
699 return 0;
700 }
701
702 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
703 {
704 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
705 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
706 struct usbhs_pipe *pipe;
707 unsigned long flags;
708
709 spin_lock_irqsave(&uep->lock, flags);
710 pipe = usbhsg_uep_to_pipe(uep);
711 if (pipe)
712 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
713
714 /*
715 * To dequeue a request, this driver should call the usbhsg_queue_pop()
716 * even if the pipe is NULL.
717 */
718 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
719 spin_unlock_irqrestore(&uep->lock, flags);
720
721 return 0;
722 }
723
724 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
725 {
726 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
727 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
728 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
729 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
730 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
731 unsigned long flags;
732
733 usbhsg_pipe_disable(uep);
734
735 dev_dbg(dev, "set halt %d (pipe %d)\n",
736 halt, usbhs_pipe_number(pipe));
737
738 /******************** spin lock ********************/
739 usbhs_lock(priv, flags);
740
741 if (halt)
742 usbhs_pipe_stall(pipe);
743 else
744 usbhs_pipe_disable(pipe);
745
746 if (halt && wedge)
747 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
748 else
749 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
750
751 usbhs_unlock(priv, flags);
752 /******************** spin unlock ******************/
753
754 return 0;
755 }
756
757 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
758 {
759 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
760 }
761
762 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
763 {
764 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
765 }
766
767 static struct usb_ep_ops usbhsg_ep_ops = {
768 .enable = usbhsg_ep_enable,
769 .disable = usbhsg_ep_disable,
770
771 .alloc_request = usbhsg_ep_alloc_request,
772 .free_request = usbhsg_ep_free_request,
773
774 .queue = usbhsg_ep_queue,
775 .dequeue = usbhsg_ep_dequeue,
776
777 .set_halt = usbhsg_ep_set_halt,
778 .set_wedge = usbhsg_ep_set_wedge,
779 };
780
781 /*
782 * pullup control
783 */
784 static int usbhsg_can_pullup(struct usbhs_priv *priv)
785 {
786 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
787
788 return gpriv->driver &&
789 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
790 }
791
792 static void usbhsg_update_pullup(struct usbhs_priv *priv)
793 {
794 if (usbhsg_can_pullup(priv))
795 usbhs_sys_function_pullup(priv, 1);
796 else
797 usbhs_sys_function_pullup(priv, 0);
798 }
799
800 /*
801 * usb module start/end
802 */
803 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
804 {
805 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
806 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
807 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
808 struct device *dev = usbhs_priv_to_dev(priv);
809 unsigned long flags;
810 int ret = 0;
811
812 /******************** spin lock ********************/
813 usbhs_lock(priv, flags);
814
815 usbhsg_status_set(gpriv, status);
816 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
817 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
818 ret = -1; /* not ready */
819
820 usbhs_unlock(priv, flags);
821 /******************** spin unlock ********************/
822
823 if (ret < 0)
824 return 0; /* not ready is not error */
825
826 /*
827 * enable interrupt and systems if ready
828 */
829 dev_dbg(dev, "start gadget\n");
830
831 /*
832 * pipe initialize and enable DCP
833 */
834 usbhs_fifo_init(priv);
835 usbhs_pipe_init(priv,
836 usbhsg_dma_map_ctrl);
837
838 /* dcp init instead of usbhsg_ep_enable() */
839 dcp->pipe = usbhs_dcp_malloc(priv);
840 dcp->pipe->mod_private = dcp;
841 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
842
843 /*
844 * system config enble
845 * - HI speed
846 * - function
847 * - usb module
848 */
849 usbhs_sys_function_ctrl(priv, 1);
850 usbhsg_update_pullup(priv);
851
852 /*
853 * enable irq callback
854 */
855 mod->irq_dev_state = usbhsg_irq_dev_state;
856 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
857 usbhs_irq_callback_update(priv, mod);
858
859 return 0;
860 }
861
862 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
863 {
864 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
865 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
866 struct usbhsg_uep *uep;
867 struct device *dev = usbhs_priv_to_dev(priv);
868 unsigned long flags;
869 int ret = 0, i;
870
871 /******************** spin lock ********************/
872 usbhs_lock(priv, flags);
873
874 usbhsg_status_clr(gpriv, status);
875 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
876 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
877 ret = -1; /* already done */
878
879 usbhs_unlock(priv, flags);
880 /******************** spin unlock ********************/
881
882 if (ret < 0)
883 return 0; /* already done is not error */
884
885 /*
886 * disable interrupt and systems if 1st try
887 */
888 usbhs_fifo_quit(priv);
889
890 /* disable all irq */
891 mod->irq_dev_state = NULL;
892 mod->irq_ctrl_stage = NULL;
893 usbhs_irq_callback_update(priv, mod);
894
895 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
896
897 /* disable sys */
898 usbhs_sys_set_test_mode(priv, 0);
899 usbhs_sys_function_ctrl(priv, 0);
900
901 /* disable all eps */
902 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
903 usbhsg_ep_disable(&uep->ep);
904
905 dev_dbg(dev, "stop gadget\n");
906
907 return 0;
908 }
909
910 /*
911 * VBUS provided by the PHY
912 */
913 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
914 {
915 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
916 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
917
918 return gpriv->vbus_active;
919 }
920
921 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
922 {
923 struct usbhs_mod_info *info = &priv->mod_info;
924
925 info->irq_vbus = NULL;
926 priv->pfunc.get_vbus = usbhsm_phy_get_vbus;
927
928 usbhs_irq_callback_update(priv, NULL);
929 }
930
931 /*
932 *
933 * linux usb function
934 *
935 */
936 static int usbhsg_gadget_start(struct usb_gadget *gadget,
937 struct usb_gadget_driver *driver)
938 {
939 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
940 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
941 struct device *dev = usbhs_priv_to_dev(priv);
942 int ret;
943
944 if (!driver ||
945 !driver->setup ||
946 driver->max_speed < USB_SPEED_FULL)
947 return -EINVAL;
948
949 /* connect to bus through transceiver */
950 if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
951 ret = otg_set_peripheral(gpriv->transceiver->otg,
952 &gpriv->gadget);
953 if (ret) {
954 dev_err(dev, "%s: can't bind to transceiver\n",
955 gpriv->gadget.name);
956 return ret;
957 }
958
959 /* get vbus using phy versions */
960 usbhs_mod_phy_mode(priv);
961 }
962
963 /* first hook up the driver ... */
964 gpriv->driver = driver;
965
966 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
967 }
968
969 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
970 {
971 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
972 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
973
974 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
975
976 if (!IS_ERR_OR_NULL(gpriv->transceiver))
977 otg_set_peripheral(gpriv->transceiver->otg, NULL);
978
979 gpriv->driver = NULL;
980
981 return 0;
982 }
983
984 /*
985 * usb gadget ops
986 */
987 static int usbhsg_get_frame(struct usb_gadget *gadget)
988 {
989 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
990 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
991
992 return usbhs_frame_get_num(priv);
993 }
994
995 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
996 {
997 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
998 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
999 unsigned long flags;
1000
1001 usbhs_lock(priv, flags);
1002 if (is_on)
1003 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1004 else
1005 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1006 usbhsg_update_pullup(priv);
1007 usbhs_unlock(priv, flags);
1008
1009 return 0;
1010 }
1011
1012 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1013 {
1014 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1015
1016 if (is_self)
1017 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1018 else
1019 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1020
1021 gadget->is_selfpowered = (is_self != 0);
1022
1023 return 0;
1024 }
1025
1026 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1027 {
1028 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1029 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1030 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1031
1032 gpriv->vbus_active = !!is_active;
1033
1034 renesas_usbhs_call_notify_hotplug(pdev);
1035
1036 return 0;
1037 }
1038
1039 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1040 .get_frame = usbhsg_get_frame,
1041 .set_selfpowered = usbhsg_set_selfpowered,
1042 .udc_start = usbhsg_gadget_start,
1043 .udc_stop = usbhsg_gadget_stop,
1044 .pullup = usbhsg_pullup,
1045 .vbus_session = usbhsg_vbus_session,
1046 };
1047
1048 static int usbhsg_start(struct usbhs_priv *priv)
1049 {
1050 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1051 }
1052
1053 static int usbhsg_stop(struct usbhs_priv *priv)
1054 {
1055 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1056
1057 /* cable disconnect */
1058 if (gpriv->driver &&
1059 gpriv->driver->disconnect)
1060 gpriv->driver->disconnect(&gpriv->gadget);
1061
1062 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1063 }
1064
1065 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1066 {
1067 struct usbhsg_gpriv *gpriv;
1068 struct usbhsg_uep *uep;
1069 struct device *dev = usbhs_priv_to_dev(priv);
1070 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1071 usbhs_get_dparam(priv, pipe_configs);
1072 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1073 int i;
1074 int ret;
1075
1076 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1077 if (!gpriv)
1078 return -ENOMEM;
1079
1080 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1081 if (!uep) {
1082 ret = -ENOMEM;
1083 goto usbhs_mod_gadget_probe_err_gpriv;
1084 }
1085 spin_lock_init(&uep->lock);
1086
1087 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1088 dev_info(dev, "%stransceiver found\n",
1089 !IS_ERR(gpriv->transceiver) ? "" : "no ");
1090
1091 /*
1092 * CAUTION
1093 *
1094 * There is no guarantee that it is possible to access usb module here.
1095 * Don't accesses to it.
1096 * The accesse will be enable after "usbhsg_start"
1097 */
1098
1099 /*
1100 * register itself
1101 */
1102 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1103
1104 /* init gpriv */
1105 gpriv->mod.name = "gadget";
1106 gpriv->mod.start = usbhsg_start;
1107 gpriv->mod.stop = usbhsg_stop;
1108 gpriv->uep = uep;
1109 gpriv->uep_size = pipe_size;
1110 usbhsg_status_init(gpriv);
1111
1112 /*
1113 * init gadget
1114 */
1115 gpriv->gadget.dev.parent = dev;
1116 gpriv->gadget.name = "renesas_usbhs_udc";
1117 gpriv->gadget.ops = &usbhsg_gadget_ops;
1118 gpriv->gadget.max_speed = USB_SPEED_HIGH;
1119 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1120 has_usb_dmac);
1121
1122 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1123
1124 /*
1125 * init usb_ep
1126 */
1127 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1128 uep->gpriv = gpriv;
1129 uep->pipe = NULL;
1130 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1131
1132 uep->ep.name = uep->ep_name;
1133 uep->ep.ops = &usbhsg_ep_ops;
1134 INIT_LIST_HEAD(&uep->ep.ep_list);
1135
1136 /* init DCP */
1137 if (usbhsg_is_dcp(uep)) {
1138 gpriv->gadget.ep0 = &uep->ep;
1139 usb_ep_set_maxpacket_limit(&uep->ep, 64);
1140 uep->ep.caps.type_control = true;
1141 } else {
1142 /* init normal pipe */
1143 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1144 uep->ep.caps.type_iso = true;
1145 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1146 uep->ep.caps.type_bulk = true;
1147 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1148 uep->ep.caps.type_int = true;
1149 usb_ep_set_maxpacket_limit(&uep->ep,
1150 pipe_configs[i].bufsize);
1151 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1152 }
1153 uep->ep.caps.dir_in = true;
1154 uep->ep.caps.dir_out = true;
1155 }
1156
1157 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1158 if (ret)
1159 goto err_add_udc;
1160
1161
1162 dev_info(dev, "gadget probed\n");
1163
1164 return 0;
1165
1166 err_add_udc:
1167 kfree(gpriv->uep);
1168
1169 usbhs_mod_gadget_probe_err_gpriv:
1170 kfree(gpriv);
1171
1172 return ret;
1173 }
1174
1175 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1176 {
1177 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1178
1179 usb_del_gadget_udc(&gpriv->gadget);
1180
1181 kfree(gpriv->uep);
1182 kfree(gpriv);
1183 }
Linux with added FPC-III support