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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/dma-mapping.h>
18#include <linux/io.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/usb/ch9.h>
22#include <linux/usb/gadget.h>
23#include "common.h"
24
25/*
26 * struct
27 */
28struct usbhsg_request {
29 struct usb_request req;
30 struct usbhs_pkt pkt;
31};
32
33#define EP_NAME_SIZE 8
34struct usbhsg_gpriv;
35struct usbhsg_uep {
36 struct usb_ep ep;
37 struct usbhs_pipe *pipe;
38
39 char ep_name[EP_NAME_SIZE];
40
41 struct usbhsg_gpriv *gpriv;
42 struct usbhs_pkt_handle *handler;
43};
44
45struct usbhsg_gpriv {
46 struct usb_gadget gadget;
47 struct usbhs_mod mod;
48 struct list_head link;
49
50 struct usbhsg_uep *uep;
51 int uep_size;
52
53 struct usb_gadget_driver *driver;
54
55 u32 status;
56#define USBHSG_STATUS_STARTED (1 << 0)
57#define USBHSG_STATUS_REGISTERD (1 << 1)
58#define USBHSG_STATUS_WEDGE (1 << 2)
59};
60
61struct usbhsg_recip_handle {
62 char *name;
63 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
64 struct usb_ctrlrequest *ctrl);
65 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
66 struct usb_ctrlrequest *ctrl);
67 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
68 struct usb_ctrlrequest *ctrl);
69};
70
71/*
72 * macro
73 */
74#define usbhsg_priv_to_gpriv(priv) \
75 container_of( \
76 usbhs_mod_get(priv, USBHS_GADGET), \
77 struct usbhsg_gpriv, mod)
78
79#define __usbhsg_for_each_uep(start, pos, g, i) \
80 for (i = start, pos = (g)->uep + i; \
81 i < (g)->uep_size; \
82 i++, pos = (g)->uep + i)
83
84#define usbhsg_for_each_uep(pos, gpriv, i) \
85 __usbhsg_for_each_uep(1, pos, gpriv, i)
86
87#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
88 __usbhsg_for_each_uep(0, pos, gpriv, i)
89
90#define usbhsg_gadget_to_gpriv(g)\
91 container_of(g, struct usbhsg_gpriv, gadget)
92
93#define usbhsg_req_to_ureq(r)\
94 container_of(r, struct usbhsg_request, req)
95
96#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
97#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
98#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
99#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
100#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
101#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
102#define usbhsg_uep_to_pipe(u) ((u)->pipe)
103#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
104#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
105
106#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
107#define usbhsg_pkt_to_ureq(i) \
108 container_of(i, struct usbhsg_request, pkt)
109
110#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
111
112/* status */
113#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
114#define usbhsg_status_set(gp, b) (gp->status |= b)
115#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
116#define usbhsg_status_has(gp, b) (gp->status & b)
117
118/* controller */
119LIST_HEAD(the_controller_link);
120
121#define usbhsg_for_each_controller(gpriv)\
122 list_for_each_entry(gpriv, &the_controller_link, link)
123#define usbhsg_controller_register(gpriv)\
124 list_add_tail(&(gpriv)->link, &the_controller_link)
125#define usbhsg_controller_unregister(gpriv)\
126 list_del_init(&(gpriv)->link)
127
128/*
129 * queue push/pop
130 */
131static void usbhsg_queue_push(struct usbhsg_uep *uep,
132 struct usbhsg_request *ureq)
133{
134 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
135 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
136 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
137 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
138 struct usb_request *req = &ureq->req;
139
140 req->actual = 0;
141 req->status = -EINPROGRESS;
142 usbhs_pkt_push(pipe, pkt, uep->handler,
143 req->buf, req->length, req->zero);
144
145 dev_dbg(dev, "pipe %d : queue push (%d)\n",
146 usbhs_pipe_number(pipe),
147 req->length);
148}
149
150static void usbhsg_queue_pop(struct usbhsg_uep *uep,
151 struct usbhsg_request *ureq,
152 int status)
153{
154 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
155 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
156 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
157
158 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
159
160 ureq->req.status = status;
161 ureq->req.complete(&uep->ep, &ureq->req);
162}
163
164static void usbhsg_queue_done(struct usbhs_pkt *pkt)
165{
166 struct usbhs_pipe *pipe = pkt->pipe;
167 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
168 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
169
170 ureq->req.actual = pkt->actual;
171
172 usbhsg_queue_pop(uep, ureq, 0);
173}
174
175/*
176 * dma map/unmap
177 */
178static int usbhsg_dma_map(struct device *dev,
179 struct usbhs_pkt *pkt,
180 enum dma_data_direction dir)
181{
182 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
183 struct usb_request *req = &ureq->req;
184
185 if (pkt->dma != DMA_ADDR_INVALID) {
186 dev_err(dev, "dma is already mapped\n");
187 return -EIO;
188 }
189
190 if (req->dma == DMA_ADDR_INVALID) {
191 pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir);
192 } else {
193 dma_sync_single_for_device(dev, req->dma, req->length, dir);
194 pkt->dma = req->dma;
195 }
196
197 if (dma_mapping_error(dev, pkt->dma)) {
198 dev_err(dev, "dma mapping error %x\n", pkt->dma);
199 return -EIO;
200 }
201
202 return 0;
203}
204
205static int usbhsg_dma_unmap(struct device *dev,
206 struct usbhs_pkt *pkt,
207 enum dma_data_direction dir)
208{
209 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
210 struct usb_request *req = &ureq->req;
211
212 if (pkt->dma == DMA_ADDR_INVALID) {
213 dev_err(dev, "dma is not mapped\n");
214 return -EIO;
215 }
216
217 if (req->dma == DMA_ADDR_INVALID)
218 dma_unmap_single(dev, pkt->dma, pkt->length, dir);
219 else
220 dma_sync_single_for_cpu(dev, req->dma, req->length, dir);
221
222 pkt->dma = DMA_ADDR_INVALID;
223
224 return 0;
225}
226
227static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
228{
229 struct usbhs_pipe *pipe = pkt->pipe;
230 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
231 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
232 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
233 enum dma_data_direction dir;
234
235 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
236
237 if (map)
238 return usbhsg_dma_map(dev, pkt, dir);
239 else
240 return usbhsg_dma_unmap(dev, pkt, dir);
241}
242
243/*
244 * USB_TYPE_STANDARD / clear feature functions
245 */
246static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
247 struct usbhsg_uep *uep,
248 struct usb_ctrlrequest *ctrl)
249{
250 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
251 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
252 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
253
254 usbhs_dcp_control_transfer_done(pipe);
255
256 return 0;
257}
258
259static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
260 struct usbhsg_uep *uep,
261 struct usb_ctrlrequest *ctrl)
262{
263 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
264 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
265
266 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
267 usbhs_pipe_disable(pipe);
268 usbhs_pipe_clear_sequence(pipe);
269 usbhs_pipe_enable(pipe);
270 }
271
272 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
273
274 return 0;
275}
276
277struct usbhsg_recip_handle req_clear_feature = {
278 .name = "clear feature",
279 .device = usbhsg_recip_handler_std_control_done,
280 .interface = usbhsg_recip_handler_std_control_done,
281 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
282};
283
284/*
285 * USB_TYPE handler
286 */
287static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
288 struct usbhsg_recip_handle *handler,
289 struct usb_ctrlrequest *ctrl)
290{
291 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
292 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
293 struct usbhsg_uep *uep;
294 struct usbhs_pipe *pipe;
295 int recip = ctrl->bRequestType & USB_RECIP_MASK;
296 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
297 int ret;
298 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
299 struct usb_ctrlrequest *ctrl);
300 char *msg;
301
302 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
303 pipe = usbhsg_uep_to_pipe(uep);
304 if (!pipe) {
305 dev_err(dev, "wrong recip request\n");
306 ret = -EINVAL;
307 goto usbhsg_recip_run_handle_end;
308 }
309
310 switch (recip) {
311 case USB_RECIP_DEVICE:
312 msg = "DEVICE";
313 func = handler->device;
314 break;
315 case USB_RECIP_INTERFACE:
316 msg = "INTERFACE";
317 func = handler->interface;
318 break;
319 case USB_RECIP_ENDPOINT:
320 msg = "ENDPOINT";
321 func = handler->endpoint;
322 break;
323 default:
324 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
325 func = NULL;
326 ret = -EINVAL;
327 }
328
329 if (func) {
330 unsigned long flags;
331
332 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
333
334 /******************** spin lock ********************/
335 usbhs_lock(priv, flags);
336 ret = func(priv, uep, ctrl);
337 usbhs_unlock(priv, flags);
338 /******************** spin unlock ******************/
339 }
340
341usbhsg_recip_run_handle_end:
342 usbhs_pkt_start(pipe);
343
344 return ret;
345}
346
347/*
348 * irq functions
349 *
350 * it will be called from usbhs_interrupt
351 */
352static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
353 struct usbhs_irq_state *irq_state)
354{
355 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
356 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
357
358 gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
359
360 dev_dbg(dev, "state = %x : speed : %d\n",
361 usbhs_status_get_device_state(irq_state),
362 gpriv->gadget.speed);
363
364 return 0;
365}
366
367static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
368 struct usbhs_irq_state *irq_state)
369{
370 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
371 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
372 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
373 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
374 struct usb_ctrlrequest ctrl;
375 struct usbhsg_recip_handle *recip_handler = NULL;
376 int stage = usbhs_status_get_ctrl_stage(irq_state);
377 int ret = 0;
378
379 dev_dbg(dev, "stage = %d\n", stage);
380
381 /*
382 * see Manual
383 *
384 * "Operation"
385 * - "Interrupt Function"
386 * - "Control Transfer Stage Transition Interrupt"
387 * - Fig. "Control Transfer Stage Transitions"
388 */
389
390 switch (stage) {
391 case READ_DATA_STAGE:
392 dcp->handler = &usbhs_fifo_pio_push_handler;
393 break;
394 case WRITE_DATA_STAGE:
395 dcp->handler = &usbhs_fifo_pio_pop_handler;
396 break;
397 case NODATA_STATUS_STAGE:
398 dcp->handler = &usbhs_ctrl_stage_end_handler;
399 break;
400 default:
401 return ret;
402 }
403
404 /*
405 * get usb request
406 */
407 usbhs_usbreq_get_val(priv, &ctrl);
408
409 switch (ctrl.bRequestType & USB_TYPE_MASK) {
410 case USB_TYPE_STANDARD:
411 switch (ctrl.bRequest) {
412 case USB_REQ_CLEAR_FEATURE:
413 recip_handler = &req_clear_feature;
414 break;
415 }
416 }
417
418 /*
419 * setup stage / run recip
420 */
421 if (recip_handler)
422 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
423 else
424 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
425
426 if (ret < 0)
427 usbhs_pipe_stall(pipe);
428
429 return ret;
430}
431
432/*
433 *
434 * usb_dcp_ops
435 *
436 */
437static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
438{
439 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
440 struct usbhs_pkt *pkt;
441
442 usbhs_pipe_disable(pipe);
443
444 while (1) {
445 pkt = usbhs_pkt_pop(pipe, NULL);
446 if (!pkt)
447 break;
448 }
449
450 return 0;
451}
452
453static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
454{
455 int i;
456 struct usbhsg_uep *uep;
457
458 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
459 uep->pipe = NULL;
460}
461
462/*
463 *
464 * usb_ep_ops
465 *
466 */
467static int usbhsg_ep_enable(struct usb_ep *ep,
468 const struct usb_endpoint_descriptor *desc)
469{
470 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
471 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
472 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
473 struct usbhs_pipe *pipe;
474 int ret = -EIO;
475
476 /*
477 * if it already have pipe,
478 * nothing to do
479 */
480 if (uep->pipe) {
481 usbhs_pipe_clear(uep->pipe);
482 usbhs_pipe_clear_sequence(uep->pipe);
483 return 0;
484 }
485
486 pipe = usbhs_pipe_malloc(priv, desc);
487 if (pipe) {
488 uep->pipe = pipe;
489 pipe->mod_private = uep;
490
491 /*
492 * usbhs_fifo_dma_push/pop_handler try to
493 * use dmaengine if possible.
494 * It will use pio handler if impossible.
495 */
496 if (usb_endpoint_dir_in(desc))
497 uep->handler = &usbhs_fifo_dma_push_handler;
498 else
499 uep->handler = &usbhs_fifo_dma_pop_handler;
500
501 ret = 0;
502 }
503
504 return ret;
505}
506
507static int usbhsg_ep_disable(struct usb_ep *ep)
508{
509 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
510
511 return usbhsg_pipe_disable(uep);
512}
513
514static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
515 gfp_t gfp_flags)
516{
517 struct usbhsg_request *ureq;
518
519 ureq = kzalloc(sizeof *ureq, gfp_flags);
520 if (!ureq)
521 return NULL;
522
523 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
524
525 ureq->req.dma = DMA_ADDR_INVALID;
526
527 return &ureq->req;
528}
529
530static void usbhsg_ep_free_request(struct usb_ep *ep,
531 struct usb_request *req)
532{
533 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
534
535 WARN_ON(!list_empty(&ureq->pkt.node));
536 kfree(ureq);
537}
538
539static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
540 gfp_t gfp_flags)
541{
542 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
543 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
544 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
545 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
546
547 /* param check */
548 if (usbhsg_is_not_connected(gpriv) ||
549 unlikely(!gpriv->driver) ||
550 unlikely(!pipe))
551 return -ESHUTDOWN;
552
553 usbhsg_queue_push(uep, ureq);
554
555 return 0;
556}
557
558static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
559{
560 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
561 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
562 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
563
564 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
565 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
566
567 return 0;
568}
569
570static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
571{
572 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
573 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
574 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
575 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
576 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
577 unsigned long flags;
578
579 usbhsg_pipe_disable(uep);
580
581 dev_dbg(dev, "set halt %d (pipe %d)\n",
582 halt, usbhs_pipe_number(pipe));
583
584 /******************** spin lock ********************/
585 usbhs_lock(priv, flags);
586
587 if (halt)
588 usbhs_pipe_stall(pipe);
589 else
590 usbhs_pipe_disable(pipe);
591
592 if (halt && wedge)
593 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
594 else
595 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
596
597 usbhs_unlock(priv, flags);
598 /******************** spin unlock ******************/
599
600 return 0;
601}
602
603static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
604{
605 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
606}
607
608static int usbhsg_ep_set_wedge(struct usb_ep *ep)
609{
610 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
611}
612
613static struct usb_ep_ops usbhsg_ep_ops = {
614 .enable = usbhsg_ep_enable,
615 .disable = usbhsg_ep_disable,
616
617 .alloc_request = usbhsg_ep_alloc_request,
618 .free_request = usbhsg_ep_free_request,
619
620 .queue = usbhsg_ep_queue,
621 .dequeue = usbhsg_ep_dequeue,
622
623 .set_halt = usbhsg_ep_set_halt,
624 .set_wedge = usbhsg_ep_set_wedge,
625};
626
627/*
628 * usb module start/end
629 */
630static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
631{
632 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
633 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
634 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
635 struct device *dev = usbhs_priv_to_dev(priv);
636 unsigned long flags;
637 int ret = 0;
638
639 /******************** spin lock ********************/
640 usbhs_lock(priv, flags);
641
642 usbhsg_status_set(gpriv, status);
643 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
644 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
645 ret = -1; /* not ready */
646
647 usbhs_unlock(priv, flags);
648 /******************** spin unlock ********************/
649
650 if (ret < 0)
651 return 0; /* not ready is not error */
652
653 /*
654 * enable interrupt and systems if ready
655 */
656 dev_dbg(dev, "start gadget\n");
657
658 /*
659 * pipe initialize and enable DCP
660 */
661 usbhs_pipe_init(priv,
662 usbhsg_queue_done,
663 usbhsg_dma_map_ctrl);
664 usbhs_fifo_init(priv);
665 usbhsg_uep_init(gpriv);
666
667 /* dcp init */
668 dcp->pipe = usbhs_dcp_malloc(priv);
669 dcp->pipe->mod_private = dcp;
670
671 /*
672 * system config enble
673 * - HI speed
674 * - function
675 * - usb module
676 */
677 usbhs_sys_hispeed_ctrl(priv, 1);
678 usbhs_sys_function_ctrl(priv, 1);
679 usbhs_sys_usb_ctrl(priv, 1);
680
681 /*
682 * enable irq callback
683 */
684 mod->irq_dev_state = usbhsg_irq_dev_state;
685 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
686 usbhs_irq_callback_update(priv, mod);
687
688 return 0;
689}
690
691static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
692{
693 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
694 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
695 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
696 struct device *dev = usbhs_priv_to_dev(priv);
697 unsigned long flags;
698 int ret = 0;
699
700 /******************** spin lock ********************/
701 usbhs_lock(priv, flags);
702
703 usbhsg_status_clr(gpriv, status);
704 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
705 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
706 ret = -1; /* already done */
707
708 usbhs_unlock(priv, flags);
709 /******************** spin unlock ********************/
710
711 if (ret < 0)
712 return 0; /* already done is not error */
713
714 /*
715 * disable interrupt and systems if 1st try
716 */
717 usbhs_fifo_quit(priv);
718
719 /* disable all irq */
720 mod->irq_dev_state = NULL;
721 mod->irq_ctrl_stage = NULL;
722 usbhs_irq_callback_update(priv, mod);
723
724 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
725
726 /* disable sys */
727 usbhs_sys_hispeed_ctrl(priv, 0);
728 usbhs_sys_function_ctrl(priv, 0);
729 usbhs_sys_usb_ctrl(priv, 0);
730
731 usbhsg_pipe_disable(dcp);
732
733 if (gpriv->driver &&
734 gpriv->driver->disconnect)
735 gpriv->driver->disconnect(&gpriv->gadget);
736
737 dev_dbg(dev, "stop gadget\n");
738
739 return 0;
740}
741
742/*
743 *
744 * linux usb function
745 *
746 */
747static int usbhsg_gadget_start(struct usb_gadget_driver *driver,
748 int (*bind)(struct usb_gadget *))
749{
750 struct usbhsg_gpriv *gpriv;
751 struct usbhs_priv *priv;
752 struct device *dev;
753 int ret;
754
755 if (!bind ||
756 !driver ||
757 !driver->setup ||
758 driver->speed != USB_SPEED_HIGH)
759 return -EINVAL;
760
761 /*
762 * find unused controller
763 */
764 usbhsg_for_each_controller(gpriv) {
765 if (!gpriv->driver)
766 goto find_unused_controller;
767 }
768 return -ENODEV;
769
770find_unused_controller:
771
772 dev = usbhsg_gpriv_to_dev(gpriv);
773 priv = usbhsg_gpriv_to_priv(gpriv);
774
775 /* first hook up the driver ... */
776 gpriv->driver = driver;
777 gpriv->gadget.dev.driver = &driver->driver;
778
779 ret = device_add(&gpriv->gadget.dev);
780 if (ret) {
781 dev_err(dev, "device_add error %d\n", ret);
782 goto add_fail;
783 }
784
785 ret = bind(&gpriv->gadget);
786 if (ret) {
787 dev_err(dev, "bind to driver %s error %d\n",
788 driver->driver.name, ret);
789 goto bind_fail;
790 }
791
792 dev_dbg(dev, "bind %s\n", driver->driver.name);
793
794 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
795
796bind_fail:
797 device_del(&gpriv->gadget.dev);
798add_fail:
799 gpriv->driver = NULL;
800 gpriv->gadget.dev.driver = NULL;
801
802 return ret;
803}
804
805static int usbhsg_gadget_stop(struct usb_gadget_driver *driver)
806{
807 struct usbhsg_gpriv *gpriv;
808 struct usbhs_priv *priv;
809 struct device *dev;
810
811 if (!driver ||
812 !driver->unbind)
813 return -EINVAL;
814
815 /*
816 * find controller
817 */
818 usbhsg_for_each_controller(gpriv) {
819 if (gpriv->driver == driver)
820 goto find_matching_controller;
821 }
822 return -ENODEV;
823
824find_matching_controller:
825
826 dev = usbhsg_gpriv_to_dev(gpriv);
827 priv = usbhsg_gpriv_to_priv(gpriv);
828
829 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
830 device_del(&gpriv->gadget.dev);
831 gpriv->driver = NULL;
832
833 if (driver->disconnect)
834 driver->disconnect(&gpriv->gadget);
835
836 driver->unbind(&gpriv->gadget);
837 dev_dbg(dev, "unbind %s\n", driver->driver.name);
838
839 return 0;
840}
841
842/*
843 * usb gadget ops
844 */
845static int usbhsg_get_frame(struct usb_gadget *gadget)
846{
847 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
848 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
849
850 return usbhs_frame_get_num(priv);
851}
852
853static struct usb_gadget_ops usbhsg_gadget_ops = {
854 .get_frame = usbhsg_get_frame,
855 .start = usbhsg_gadget_start,
856 .stop = usbhsg_gadget_stop,
857};
858
859static int usbhsg_start(struct usbhs_priv *priv)
860{
861 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
862}
863
864static int usbhsg_stop(struct usbhs_priv *priv)
865{
866 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
867}
868
869int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
870{
871 struct usbhsg_gpriv *gpriv;
872 struct usbhsg_uep *uep;
873 struct device *dev = usbhs_priv_to_dev(priv);
874 int pipe_size = usbhs_get_dparam(priv, pipe_size);
875 int i;
876 int ret;
877
878 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
879 if (!gpriv) {
880 dev_err(dev, "Could not allocate gadget priv\n");
881 return -ENOMEM;
882 }
883
884 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
885 if (!uep) {
886 dev_err(dev, "Could not allocate ep\n");
887 ret = -ENOMEM;
888 goto usbhs_mod_gadget_probe_err_gpriv;
889 }
890
891 /*
892 * CAUTION
893 *
894 * There is no guarantee that it is possible to access usb module here.
895 * Don't accesses to it.
896 * The accesse will be enable after "usbhsg_start"
897 */
898
899 /*
900 * register itself
901 */
902 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
903
904 /* init gpriv */
905 gpriv->mod.name = "gadget";
906 gpriv->mod.start = usbhsg_start;
907 gpriv->mod.stop = usbhsg_stop;
908 gpriv->uep = uep;
909 gpriv->uep_size = pipe_size;
910 usbhsg_status_init(gpriv);
911
912 /*
913 * init gadget
914 */
915 device_initialize(&gpriv->gadget.dev);
916 dev_set_name(&gpriv->gadget.dev, "gadget");
917 gpriv->gadget.dev.parent = dev;
918 gpriv->gadget.name = "renesas_usbhs_udc";
919 gpriv->gadget.ops = &usbhsg_gadget_ops;
920 gpriv->gadget.is_dualspeed = 1;
921
922 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
923
924 /*
925 * init usb_ep
926 */
927 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
928 uep->gpriv = gpriv;
929 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
930
931 uep->ep.name = uep->ep_name;
932 uep->ep.ops = &usbhsg_ep_ops;
933 INIT_LIST_HEAD(&uep->ep.ep_list);
934
935 /* init DCP */
936 if (usbhsg_is_dcp(uep)) {
937 gpriv->gadget.ep0 = &uep->ep;
938 uep->ep.maxpacket = 64;
939 }
940 /* init normal pipe */
941 else {
942 uep->ep.maxpacket = 512;
943 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
944 }
945 }
946
947 usbhsg_controller_register(gpriv);
948
949 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
950 if (ret)
951 goto err_add_udc;
952
953
954 dev_info(dev, "gadget probed\n");
955
956 return 0;
957err_add_udc:
958 kfree(gpriv->uep);
959
960usbhs_mod_gadget_probe_err_gpriv:
961 kfree(gpriv);
962
963 return ret;
964}
965
966void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
967{
968 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
969
970 usb_del_gadget_udc(&gpriv->gadget);
971
972 usbhsg_controller_unregister(gpriv);
973
974 kfree(gpriv->uep);
975 kfree(gpriv);
976}
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 "common.h"
25
26/*
27 * struct
28 */
29struct usbhsg_request {
30 struct usb_request req;
31 struct usbhs_pkt pkt;
32};
33
34#define EP_NAME_SIZE 8
35struct usbhsg_gpriv;
36struct usbhsg_uep {
37 struct usb_ep ep;
38 struct usbhs_pipe *pipe;
39
40 char ep_name[EP_NAME_SIZE];
41
42 struct usbhsg_gpriv *gpriv;
43};
44
45struct usbhsg_gpriv {
46 struct usb_gadget gadget;
47 struct usbhs_mod mod;
48
49 struct usbhsg_uep *uep;
50 int uep_size;
51
52 struct usb_gadget_driver *driver;
53
54 u32 status;
55#define USBHSG_STATUS_STARTED (1 << 0)
56#define USBHSG_STATUS_REGISTERD (1 << 1)
57#define USBHSG_STATUS_WEDGE (1 << 2)
58#define USBHSG_STATUS_SELF_POWERED (1 << 3)
59};
60
61struct usbhsg_recip_handle {
62 char *name;
63 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
64 struct usb_ctrlrequest *ctrl);
65 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
66 struct usb_ctrlrequest *ctrl);
67 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
68 struct usb_ctrlrequest *ctrl);
69};
70
71/*
72 * macro
73 */
74#define usbhsg_priv_to_gpriv(priv) \
75 container_of( \
76 usbhs_mod_get(priv, USBHS_GADGET), \
77 struct usbhsg_gpriv, mod)
78
79#define __usbhsg_for_each_uep(start, pos, g, i) \
80 for ((i) = start; \
81 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
82 (i)++)
83
84#define usbhsg_for_each_uep(pos, gpriv, i) \
85 __usbhsg_for_each_uep(1, pos, gpriv, i)
86
87#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
88 __usbhsg_for_each_uep(0, pos, gpriv, i)
89
90#define usbhsg_gadget_to_gpriv(g)\
91 container_of(g, struct usbhsg_gpriv, gadget)
92
93#define usbhsg_req_to_ureq(r)\
94 container_of(r, struct usbhsg_request, req)
95
96#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
97#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
98#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
99#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
100#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
101#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
102#define usbhsg_uep_to_pipe(u) ((u)->pipe)
103#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
104#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
105
106#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
107#define usbhsg_pkt_to_ureq(i) \
108 container_of(i, struct usbhsg_request, pkt)
109
110#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
111
112/* status */
113#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
114#define usbhsg_status_set(gp, b) (gp->status |= b)
115#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
116#define usbhsg_status_has(gp, b) (gp->status & b)
117
118/*
119 * queue push/pop
120 */
121static void usbhsg_queue_pop(struct usbhsg_uep *uep,
122 struct usbhsg_request *ureq,
123 int status)
124{
125 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
126 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
127 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
128
129 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
130
131 ureq->req.status = status;
132 ureq->req.complete(&uep->ep, &ureq->req);
133}
134
135static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
136{
137 struct usbhs_pipe *pipe = pkt->pipe;
138 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
139 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
140
141 ureq->req.actual = pkt->actual;
142
143 usbhsg_queue_pop(uep, ureq, 0);
144}
145
146static void usbhsg_queue_push(struct usbhsg_uep *uep,
147 struct usbhsg_request *ureq)
148{
149 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
150 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
151 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
152 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
153 struct usb_request *req = &ureq->req;
154
155 req->actual = 0;
156 req->status = -EINPROGRESS;
157 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
158 req->buf, req->length, req->zero, -1);
159 usbhs_pkt_start(pipe);
160
161 dev_dbg(dev, "pipe %d : queue push (%d)\n",
162 usbhs_pipe_number(pipe),
163 req->length);
164}
165
166/*
167 * dma map/unmap
168 */
169static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
170{
171 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
172 struct usb_request *req = &ureq->req;
173 struct usbhs_pipe *pipe = pkt->pipe;
174 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
175 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
176 enum dma_data_direction dir;
177 int ret = 0;
178
179 dir = usbhs_pipe_is_dir_host(pipe);
180
181 if (map) {
182 /* it can not use scatter/gather */
183 WARN_ON(req->num_sgs);
184
185 ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
186 if (ret < 0)
187 return ret;
188
189 pkt->dma = req->dma;
190 } else {
191 usb_gadget_unmap_request(&gpriv->gadget, req, dir);
192 }
193
194 return ret;
195}
196
197/*
198 * USB_TYPE_STANDARD / clear feature functions
199 */
200static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
201 struct usbhsg_uep *uep,
202 struct usb_ctrlrequest *ctrl)
203{
204 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
205 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
206 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
207
208 usbhs_dcp_control_transfer_done(pipe);
209
210 return 0;
211}
212
213static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
214 struct usbhsg_uep *uep,
215 struct usb_ctrlrequest *ctrl)
216{
217 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
218 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
219
220 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
221 usbhs_pipe_disable(pipe);
222 usbhs_pipe_sequence_data0(pipe);
223 usbhs_pipe_enable(pipe);
224 }
225
226 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
227
228 usbhs_pkt_start(pipe);
229
230 return 0;
231}
232
233static struct usbhsg_recip_handle req_clear_feature = {
234 .name = "clear feature",
235 .device = usbhsg_recip_handler_std_control_done,
236 .interface = usbhsg_recip_handler_std_control_done,
237 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
238};
239
240/*
241 * USB_TYPE_STANDARD / set feature functions
242 */
243static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
244 struct usbhsg_uep *uep,
245 struct usb_ctrlrequest *ctrl)
246{
247 switch (le16_to_cpu(ctrl->wValue)) {
248 case USB_DEVICE_TEST_MODE:
249 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
250 udelay(100);
251 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
252 break;
253 default:
254 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
255 break;
256 }
257
258 return 0;
259}
260
261static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
262 struct usbhsg_uep *uep,
263 struct usb_ctrlrequest *ctrl)
264{
265 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
266
267 usbhs_pipe_stall(pipe);
268
269 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
270
271 return 0;
272}
273
274static struct usbhsg_recip_handle req_set_feature = {
275 .name = "set feature",
276 .device = usbhsg_recip_handler_std_set_device,
277 .interface = usbhsg_recip_handler_std_control_done,
278 .endpoint = usbhsg_recip_handler_std_set_endpoint,
279};
280
281/*
282 * USB_TYPE_STANDARD / get status functions
283 */
284static void __usbhsg_recip_send_complete(struct usb_ep *ep,
285 struct usb_request *req)
286{
287 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
288
289 /* free allocated recip-buffer/usb_request */
290 kfree(ureq->pkt.buf);
291 usb_ep_free_request(ep, req);
292}
293
294static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
295 unsigned short status)
296{
297 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
298 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
299 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
300 struct usb_request *req;
301 unsigned short *buf;
302
303 /* alloc new usb_request for recip */
304 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
305 if (!req) {
306 dev_err(dev, "recip request allocation fail\n");
307 return;
308 }
309
310 /* alloc recip data buffer */
311 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
312 if (!buf) {
313 usb_ep_free_request(&dcp->ep, req);
314 dev_err(dev, "recip data allocation fail\n");
315 return;
316 }
317
318 /* recip data is status */
319 *buf = cpu_to_le16(status);
320
321 /* allocated usb_request/buffer will be freed */
322 req->complete = __usbhsg_recip_send_complete;
323 req->buf = buf;
324 req->length = sizeof(*buf);
325 req->zero = 0;
326
327 /* push packet */
328 pipe->handler = &usbhs_fifo_pio_push_handler;
329 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
330}
331
332static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
333 struct usbhsg_uep *uep,
334 struct usb_ctrlrequest *ctrl)
335{
336 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
337 unsigned short status = 0;
338
339 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
340 status = 1 << USB_DEVICE_SELF_POWERED;
341
342 __usbhsg_recip_send_status(gpriv, status);
343
344 return 0;
345}
346
347static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
348 struct usbhsg_uep *uep,
349 struct usb_ctrlrequest *ctrl)
350{
351 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
352 unsigned short status = 0;
353
354 __usbhsg_recip_send_status(gpriv, status);
355
356 return 0;
357}
358
359static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
360 struct usbhsg_uep *uep,
361 struct usb_ctrlrequest *ctrl)
362{
363 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
364 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
365 unsigned short status = 0;
366
367 if (usbhs_pipe_is_stall(pipe))
368 status = 1 << USB_ENDPOINT_HALT;
369
370 __usbhsg_recip_send_status(gpriv, status);
371
372 return 0;
373}
374
375static struct usbhsg_recip_handle req_get_status = {
376 .name = "get status",
377 .device = usbhsg_recip_handler_std_get_device,
378 .interface = usbhsg_recip_handler_std_get_interface,
379 .endpoint = usbhsg_recip_handler_std_get_endpoint,
380};
381
382/*
383 * USB_TYPE handler
384 */
385static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
386 struct usbhsg_recip_handle *handler,
387 struct usb_ctrlrequest *ctrl)
388{
389 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
390 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
391 struct usbhsg_uep *uep;
392 struct usbhs_pipe *pipe;
393 int recip = ctrl->bRequestType & USB_RECIP_MASK;
394 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
395 int ret = 0;
396 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
397 struct usb_ctrlrequest *ctrl);
398 char *msg;
399
400 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
401 pipe = usbhsg_uep_to_pipe(uep);
402 if (!pipe) {
403 dev_err(dev, "wrong recip request\n");
404 return -EINVAL;
405 }
406
407 switch (recip) {
408 case USB_RECIP_DEVICE:
409 msg = "DEVICE";
410 func = handler->device;
411 break;
412 case USB_RECIP_INTERFACE:
413 msg = "INTERFACE";
414 func = handler->interface;
415 break;
416 case USB_RECIP_ENDPOINT:
417 msg = "ENDPOINT";
418 func = handler->endpoint;
419 break;
420 default:
421 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
422 func = NULL;
423 ret = -EINVAL;
424 }
425
426 if (func) {
427 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
428 ret = func(priv, uep, ctrl);
429 }
430
431 return ret;
432}
433
434/*
435 * irq functions
436 *
437 * it will be called from usbhs_interrupt
438 */
439static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
440 struct usbhs_irq_state *irq_state)
441{
442 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
443 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
444
445 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
446
447 dev_dbg(dev, "state = %x : speed : %d\n",
448 usbhs_status_get_device_state(irq_state),
449 gpriv->gadget.speed);
450
451 return 0;
452}
453
454static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
455 struct usbhs_irq_state *irq_state)
456{
457 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
458 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
459 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
460 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
461 struct usb_ctrlrequest ctrl;
462 struct usbhsg_recip_handle *recip_handler = NULL;
463 int stage = usbhs_status_get_ctrl_stage(irq_state);
464 int ret = 0;
465
466 dev_dbg(dev, "stage = %d\n", stage);
467
468 /*
469 * see Manual
470 *
471 * "Operation"
472 * - "Interrupt Function"
473 * - "Control Transfer Stage Transition Interrupt"
474 * - Fig. "Control Transfer Stage Transitions"
475 */
476
477 switch (stage) {
478 case READ_DATA_STAGE:
479 pipe->handler = &usbhs_fifo_pio_push_handler;
480 break;
481 case WRITE_DATA_STAGE:
482 pipe->handler = &usbhs_fifo_pio_pop_handler;
483 break;
484 case NODATA_STATUS_STAGE:
485 pipe->handler = &usbhs_ctrl_stage_end_handler;
486 break;
487 default:
488 return ret;
489 }
490
491 /*
492 * get usb request
493 */
494 usbhs_usbreq_get_val(priv, &ctrl);
495
496 switch (ctrl.bRequestType & USB_TYPE_MASK) {
497 case USB_TYPE_STANDARD:
498 switch (ctrl.bRequest) {
499 case USB_REQ_CLEAR_FEATURE:
500 recip_handler = &req_clear_feature;
501 break;
502 case USB_REQ_SET_FEATURE:
503 recip_handler = &req_set_feature;
504 break;
505 case USB_REQ_GET_STATUS:
506 recip_handler = &req_get_status;
507 break;
508 }
509 }
510
511 /*
512 * setup stage / run recip
513 */
514 if (recip_handler)
515 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
516 else
517 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
518
519 if (ret < 0)
520 usbhs_pipe_stall(pipe);
521
522 return ret;
523}
524
525/*
526 *
527 * usb_dcp_ops
528 *
529 */
530static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
531{
532 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
533 struct usbhs_pkt *pkt;
534
535 while (1) {
536 pkt = usbhs_pkt_pop(pipe, NULL);
537 if (!pkt)
538 break;
539
540 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
541 }
542
543 usbhs_pipe_disable(pipe);
544
545 return 0;
546}
547
548/*
549 *
550 * usb_ep_ops
551 *
552 */
553static int usbhsg_ep_enable(struct usb_ep *ep,
554 const struct usb_endpoint_descriptor *desc)
555{
556 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
557 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
558 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
559 struct usbhs_pipe *pipe;
560 int ret = -EIO;
561
562 /*
563 * if it already have pipe,
564 * nothing to do
565 */
566 if (uep->pipe) {
567 usbhs_pipe_clear(uep->pipe);
568 usbhs_pipe_sequence_data0(uep->pipe);
569 return 0;
570 }
571
572 pipe = usbhs_pipe_malloc(priv,
573 usb_endpoint_type(desc),
574 usb_endpoint_dir_in(desc));
575 if (pipe) {
576 uep->pipe = pipe;
577 pipe->mod_private = uep;
578
579 /* set epnum / maxp */
580 usbhs_pipe_config_update(pipe, 0,
581 usb_endpoint_num(desc),
582 usb_endpoint_maxp(desc));
583
584 /*
585 * usbhs_fifo_dma_push/pop_handler try to
586 * use dmaengine if possible.
587 * It will use pio handler if impossible.
588 */
589 if (usb_endpoint_dir_in(desc))
590 pipe->handler = &usbhs_fifo_dma_push_handler;
591 else
592 pipe->handler = &usbhs_fifo_dma_pop_handler;
593
594 ret = 0;
595 }
596
597 return ret;
598}
599
600static int usbhsg_ep_disable(struct usb_ep *ep)
601{
602 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
603
604 usbhsg_pipe_disable(uep);
605
606 uep->pipe->mod_private = NULL;
607 uep->pipe = NULL;
608
609 return 0;
610}
611
612static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
613 gfp_t gfp_flags)
614{
615 struct usbhsg_request *ureq;
616
617 ureq = kzalloc(sizeof *ureq, gfp_flags);
618 if (!ureq)
619 return NULL;
620
621 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
622
623 return &ureq->req;
624}
625
626static void usbhsg_ep_free_request(struct usb_ep *ep,
627 struct usb_request *req)
628{
629 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
630
631 WARN_ON(!list_empty(&ureq->pkt.node));
632 kfree(ureq);
633}
634
635static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
636 gfp_t gfp_flags)
637{
638 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
639 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
640 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
641 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
642
643 /* param check */
644 if (usbhsg_is_not_connected(gpriv) ||
645 unlikely(!gpriv->driver) ||
646 unlikely(!pipe))
647 return -ESHUTDOWN;
648
649 usbhsg_queue_push(uep, ureq);
650
651 return 0;
652}
653
654static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
655{
656 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
657 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
658 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
659
660 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
661 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
662
663 return 0;
664}
665
666static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
667{
668 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
669 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
670 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
671 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
672 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
673 unsigned long flags;
674
675 usbhsg_pipe_disable(uep);
676
677 dev_dbg(dev, "set halt %d (pipe %d)\n",
678 halt, usbhs_pipe_number(pipe));
679
680 /******************** spin lock ********************/
681 usbhs_lock(priv, flags);
682
683 if (halt)
684 usbhs_pipe_stall(pipe);
685 else
686 usbhs_pipe_disable(pipe);
687
688 if (halt && wedge)
689 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
690 else
691 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
692
693 usbhs_unlock(priv, flags);
694 /******************** spin unlock ******************/
695
696 return 0;
697}
698
699static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
700{
701 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
702}
703
704static int usbhsg_ep_set_wedge(struct usb_ep *ep)
705{
706 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
707}
708
709static struct usb_ep_ops usbhsg_ep_ops = {
710 .enable = usbhsg_ep_enable,
711 .disable = usbhsg_ep_disable,
712
713 .alloc_request = usbhsg_ep_alloc_request,
714 .free_request = usbhsg_ep_free_request,
715
716 .queue = usbhsg_ep_queue,
717 .dequeue = usbhsg_ep_dequeue,
718
719 .set_halt = usbhsg_ep_set_halt,
720 .set_wedge = usbhsg_ep_set_wedge,
721};
722
723/*
724 * usb module start/end
725 */
726static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
727{
728 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
729 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
730 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
731 struct device *dev = usbhs_priv_to_dev(priv);
732 unsigned long flags;
733 int ret = 0;
734
735 /******************** spin lock ********************/
736 usbhs_lock(priv, flags);
737
738 usbhsg_status_set(gpriv, status);
739 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
740 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
741 ret = -1; /* not ready */
742
743 usbhs_unlock(priv, flags);
744 /******************** spin unlock ********************/
745
746 if (ret < 0)
747 return 0; /* not ready is not error */
748
749 /*
750 * enable interrupt and systems if ready
751 */
752 dev_dbg(dev, "start gadget\n");
753
754 /*
755 * pipe initialize and enable DCP
756 */
757 usbhs_pipe_init(priv,
758 usbhsg_dma_map_ctrl);
759 usbhs_fifo_init(priv);
760
761 /* dcp init instead of usbhsg_ep_enable() */
762 dcp->pipe = usbhs_dcp_malloc(priv);
763 dcp->pipe->mod_private = dcp;
764 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
765
766 /*
767 * system config enble
768 * - HI speed
769 * - function
770 * - usb module
771 */
772 usbhs_sys_function_ctrl(priv, 1);
773
774 /*
775 * enable irq callback
776 */
777 mod->irq_dev_state = usbhsg_irq_dev_state;
778 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
779 usbhs_irq_callback_update(priv, mod);
780
781 return 0;
782}
783
784static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
785{
786 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
787 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
788 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
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_clr(gpriv, status);
797 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
798 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
799 ret = -1; /* already done */
800
801 usbhs_unlock(priv, flags);
802 /******************** spin unlock ********************/
803
804 if (ret < 0)
805 return 0; /* already done is not error */
806
807 /*
808 * disable interrupt and systems if 1st try
809 */
810 usbhs_fifo_quit(priv);
811
812 /* disable all irq */
813 mod->irq_dev_state = NULL;
814 mod->irq_ctrl_stage = NULL;
815 usbhs_irq_callback_update(priv, mod);
816
817 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
818
819 /* disable sys */
820 usbhs_sys_set_test_mode(priv, 0);
821 usbhs_sys_function_ctrl(priv, 0);
822
823 usbhsg_ep_disable(&dcp->ep);
824
825 dev_dbg(dev, "stop gadget\n");
826
827 return 0;
828}
829
830/*
831 *
832 * linux usb function
833 *
834 */
835static int usbhsg_gadget_start(struct usb_gadget *gadget,
836 struct usb_gadget_driver *driver)
837{
838 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
839 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
840
841 if (!driver ||
842 !driver->setup ||
843 driver->max_speed < USB_SPEED_FULL)
844 return -EINVAL;
845
846 /* first hook up the driver ... */
847 gpriv->driver = driver;
848
849 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
850}
851
852static int usbhsg_gadget_stop(struct usb_gadget *gadget,
853 struct usb_gadget_driver *driver)
854{
855 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
856 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
857
858 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
859 gpriv->driver = NULL;
860
861 return 0;
862}
863
864/*
865 * usb gadget ops
866 */
867static int usbhsg_get_frame(struct usb_gadget *gadget)
868{
869 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
870 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
871
872 return usbhs_frame_get_num(priv);
873}
874
875static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
876{
877 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
878 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
879
880 usbhs_sys_function_pullup(priv, is_on);
881
882 return 0;
883}
884
885static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
886{
887 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
888
889 if (is_self)
890 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
891 else
892 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
893
894 return 0;
895}
896
897static const struct usb_gadget_ops usbhsg_gadget_ops = {
898 .get_frame = usbhsg_get_frame,
899 .set_selfpowered = usbhsg_set_selfpowered,
900 .udc_start = usbhsg_gadget_start,
901 .udc_stop = usbhsg_gadget_stop,
902 .pullup = usbhsg_pullup,
903};
904
905static int usbhsg_start(struct usbhs_priv *priv)
906{
907 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
908}
909
910static int usbhsg_stop(struct usbhs_priv *priv)
911{
912 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
913
914 /* cable disconnect */
915 if (gpriv->driver &&
916 gpriv->driver->disconnect)
917 gpriv->driver->disconnect(&gpriv->gadget);
918
919 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
920}
921
922int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
923{
924 struct usbhsg_gpriv *gpriv;
925 struct usbhsg_uep *uep;
926 struct device *dev = usbhs_priv_to_dev(priv);
927 int pipe_size = usbhs_get_dparam(priv, pipe_size);
928 int i;
929 int ret;
930
931 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
932 if (!gpriv) {
933 dev_err(dev, "Could not allocate gadget priv\n");
934 return -ENOMEM;
935 }
936
937 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
938 if (!uep) {
939 dev_err(dev, "Could not allocate ep\n");
940 ret = -ENOMEM;
941 goto usbhs_mod_gadget_probe_err_gpriv;
942 }
943
944 /*
945 * CAUTION
946 *
947 * There is no guarantee that it is possible to access usb module here.
948 * Don't accesses to it.
949 * The accesse will be enable after "usbhsg_start"
950 */
951
952 /*
953 * register itself
954 */
955 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
956
957 /* init gpriv */
958 gpriv->mod.name = "gadget";
959 gpriv->mod.start = usbhsg_start;
960 gpriv->mod.stop = usbhsg_stop;
961 gpriv->uep = uep;
962 gpriv->uep_size = pipe_size;
963 usbhsg_status_init(gpriv);
964
965 /*
966 * init gadget
967 */
968 gpriv->gadget.dev.parent = dev;
969 gpriv->gadget.name = "renesas_usbhs_udc";
970 gpriv->gadget.ops = &usbhsg_gadget_ops;
971 gpriv->gadget.max_speed = USB_SPEED_HIGH;
972
973 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
974
975 /*
976 * init usb_ep
977 */
978 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
979 uep->gpriv = gpriv;
980 uep->pipe = NULL;
981 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
982
983 uep->ep.name = uep->ep_name;
984 uep->ep.ops = &usbhsg_ep_ops;
985 INIT_LIST_HEAD(&uep->ep.ep_list);
986
987 /* init DCP */
988 if (usbhsg_is_dcp(uep)) {
989 gpriv->gadget.ep0 = &uep->ep;
990 usb_ep_set_maxpacket_limit(&uep->ep, 64);
991 }
992 /* init normal pipe */
993 else {
994 usb_ep_set_maxpacket_limit(&uep->ep, 512);
995 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
996 }
997 }
998
999 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1000 if (ret)
1001 goto err_add_udc;
1002
1003
1004 dev_info(dev, "gadget probed\n");
1005
1006 return 0;
1007
1008err_add_udc:
1009 kfree(gpriv->uep);
1010
1011usbhs_mod_gadget_probe_err_gpriv:
1012 kfree(gpriv);
1013
1014 return ret;
1015}
1016
1017void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1018{
1019 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1020
1021 usb_del_gadget_udc(&gpriv->gadget);
1022
1023 kfree(gpriv->uep);
1024 kfree(gpriv);
1025}