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