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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/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 */
30struct usbhsg_request {
31 struct usb_request req;
32 struct usbhs_pkt pkt;
33};
34
35#define EP_NAME_SIZE 8
36struct usbhsg_gpriv;
37struct 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
46struct 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
65struct 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 */
125static 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
143static 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
156static 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
171static 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 */
194static 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 */
225static 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
238static 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
258static 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 */
268static 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
286static 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
299static 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 */
309static 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
319static 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
357static 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
372static 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
384static 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
400static 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 */
410static 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 */
464static 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
479static 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 */
558static 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 */
581static 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
628static 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
645static 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
659static 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
668static 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
687static 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
705static 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
738static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
739{
740 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
741}
742
743static int usbhsg_ep_set_wedge(struct usb_ep *ep)
744{
745 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
746}
747
748static 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 */
765static 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
773static 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 */
784static 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
843static 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 */
892static 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
900static 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 */
915static 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
948static 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 */
966static 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
974static 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
991static 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
1005static 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
1018static 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
1027static int usbhsg_start(struct usbhs_priv *priv)
1028{
1029 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1030}
1031
1032static 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
1044int 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
1145err_add_udc:
1146 kfree(gpriv->uep);
1147
1148usbhs_mod_gadget_probe_err_gpriv:
1149 kfree(gpriv);
1150
1151 return ret;
1152}
1153
1154void 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}
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, 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/*
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
233struct 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
274struct 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
375struct 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
548static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
549{
550 int i;
551 struct usbhsg_uep *uep;
552
553 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
554 uep->pipe = NULL;
555}
556
557/*
558 *
559 * usb_ep_ops
560 *
561 */
562static int usbhsg_ep_enable(struct usb_ep *ep,
563 const struct usb_endpoint_descriptor *desc)
564{
565 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
566 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
567 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
568 struct usbhs_pipe *pipe;
569 int ret = -EIO;
570
571 /*
572 * if it already have pipe,
573 * nothing to do
574 */
575 if (uep->pipe) {
576 usbhs_pipe_clear(uep->pipe);
577 usbhs_pipe_sequence_data0(uep->pipe);
578 return 0;
579 }
580
581 pipe = usbhs_pipe_malloc(priv,
582 usb_endpoint_type(desc),
583 usb_endpoint_dir_in(desc));
584 if (pipe) {
585 uep->pipe = pipe;
586 pipe->mod_private = uep;
587
588 /* set epnum / maxp */
589 usbhs_pipe_config_update(pipe, 0,
590 usb_endpoint_num(desc),
591 usb_endpoint_maxp(desc));
592
593 /*
594 * usbhs_fifo_dma_push/pop_handler try to
595 * use dmaengine if possible.
596 * It will use pio handler if impossible.
597 */
598 if (usb_endpoint_dir_in(desc))
599 pipe->handler = &usbhs_fifo_dma_push_handler;
600 else
601 pipe->handler = &usbhs_fifo_dma_pop_handler;
602
603 ret = 0;
604 }
605
606 return ret;
607}
608
609static int usbhsg_ep_disable(struct usb_ep *ep)
610{
611 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
612
613 return usbhsg_pipe_disable(uep);
614}
615
616static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
617 gfp_t gfp_flags)
618{
619 struct usbhsg_request *ureq;
620
621 ureq = kzalloc(sizeof *ureq, gfp_flags);
622 if (!ureq)
623 return NULL;
624
625 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
626
627 return &ureq->req;
628}
629
630static void usbhsg_ep_free_request(struct usb_ep *ep,
631 struct usb_request *req)
632{
633 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
634
635 WARN_ON(!list_empty(&ureq->pkt.node));
636 kfree(ureq);
637}
638
639static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
640 gfp_t gfp_flags)
641{
642 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
643 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
644 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
645 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
646
647 /* param check */
648 if (usbhsg_is_not_connected(gpriv) ||
649 unlikely(!gpriv->driver) ||
650 unlikely(!pipe))
651 return -ESHUTDOWN;
652
653 usbhsg_queue_push(uep, ureq);
654
655 return 0;
656}
657
658static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
659{
660 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
661 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
662 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
663
664 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
665 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
666
667 return 0;
668}
669
670static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
671{
672 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
673 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
674 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
675 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
676 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
677 unsigned long flags;
678
679 usbhsg_pipe_disable(uep);
680
681 dev_dbg(dev, "set halt %d (pipe %d)\n",
682 halt, usbhs_pipe_number(pipe));
683
684 /******************** spin lock ********************/
685 usbhs_lock(priv, flags);
686
687 if (halt)
688 usbhs_pipe_stall(pipe);
689 else
690 usbhs_pipe_disable(pipe);
691
692 if (halt && wedge)
693 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
694 else
695 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
696
697 usbhs_unlock(priv, flags);
698 /******************** spin unlock ******************/
699
700 return 0;
701}
702
703static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
704{
705 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
706}
707
708static int usbhsg_ep_set_wedge(struct usb_ep *ep)
709{
710 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
711}
712
713static struct usb_ep_ops usbhsg_ep_ops = {
714 .enable = usbhsg_ep_enable,
715 .disable = usbhsg_ep_disable,
716
717 .alloc_request = usbhsg_ep_alloc_request,
718 .free_request = usbhsg_ep_free_request,
719
720 .queue = usbhsg_ep_queue,
721 .dequeue = usbhsg_ep_dequeue,
722
723 .set_halt = usbhsg_ep_set_halt,
724 .set_wedge = usbhsg_ep_set_wedge,
725};
726
727/*
728 * usb module start/end
729 */
730static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
731{
732 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
733 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
734 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
735 struct device *dev = usbhs_priv_to_dev(priv);
736 unsigned long flags;
737 int ret = 0;
738
739 /******************** spin lock ********************/
740 usbhs_lock(priv, flags);
741
742 usbhsg_status_set(gpriv, status);
743 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
744 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
745 ret = -1; /* not ready */
746
747 usbhs_unlock(priv, flags);
748 /******************** spin unlock ********************/
749
750 if (ret < 0)
751 return 0; /* not ready is not error */
752
753 /*
754 * enable interrupt and systems if ready
755 */
756 dev_dbg(dev, "start gadget\n");
757
758 /*
759 * pipe initialize and enable DCP
760 */
761 usbhs_pipe_init(priv,
762 usbhsg_dma_map_ctrl);
763 usbhs_fifo_init(priv);
764 usbhsg_uep_init(gpriv);
765
766 /* dcp init */
767 dcp->pipe = usbhs_dcp_malloc(priv);
768 dcp->pipe->mod_private = dcp;
769 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
770
771 /*
772 * system config enble
773 * - HI speed
774 * - function
775 * - usb module
776 */
777 usbhs_sys_function_ctrl(priv, 1);
778
779 /*
780 * enable irq callback
781 */
782 mod->irq_dev_state = usbhsg_irq_dev_state;
783 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
784 usbhs_irq_callback_update(priv, mod);
785
786 return 0;
787}
788
789static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
790{
791 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
792 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
793 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
794 struct device *dev = usbhs_priv_to_dev(priv);
795 unsigned long flags;
796 int ret = 0;
797
798 /******************** spin lock ********************/
799 usbhs_lock(priv, flags);
800
801 usbhsg_status_clr(gpriv, status);
802 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
803 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
804 ret = -1; /* already done */
805
806 usbhs_unlock(priv, flags);
807 /******************** spin unlock ********************/
808
809 if (ret < 0)
810 return 0; /* already done is not error */
811
812 /*
813 * disable interrupt and systems if 1st try
814 */
815 usbhs_fifo_quit(priv);
816
817 /* disable all irq */
818 mod->irq_dev_state = NULL;
819 mod->irq_ctrl_stage = NULL;
820 usbhs_irq_callback_update(priv, mod);
821
822 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
823
824 /* disable sys */
825 usbhs_sys_set_test_mode(priv, 0);
826 usbhs_sys_function_ctrl(priv, 0);
827
828 usbhsg_pipe_disable(dcp);
829
830 dev_dbg(dev, "stop gadget\n");
831
832 return 0;
833}
834
835/*
836 *
837 * linux usb function
838 *
839 */
840static int usbhsg_gadget_start(struct usb_gadget *gadget,
841 struct usb_gadget_driver *driver)
842{
843 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
844 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
845
846 if (!driver ||
847 !driver->setup ||
848 driver->max_speed < USB_SPEED_FULL)
849 return -EINVAL;
850
851 /* first hook up the driver ... */
852 gpriv->driver = driver;
853 gpriv->gadget.dev.driver = &driver->driver;
854
855 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
856}
857
858static int usbhsg_gadget_stop(struct usb_gadget *gadget,
859 struct usb_gadget_driver *driver)
860{
861 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
862 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
863
864 if (!driver ||
865 !driver->unbind)
866 return -EINVAL;
867
868 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
869 gpriv->gadget.dev.driver = NULL;
870 gpriv->driver = NULL;
871
872 return 0;
873}
874
875/*
876 * usb gadget ops
877 */
878static int usbhsg_get_frame(struct usb_gadget *gadget)
879{
880 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
881 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
882
883 return usbhs_frame_get_num(priv);
884}
885
886static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
887{
888 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
889
890 if (is_self)
891 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
892 else
893 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
894
895 return 0;
896}
897
898static struct usb_gadget_ops usbhsg_gadget_ops = {
899 .get_frame = usbhsg_get_frame,
900 .set_selfpowered = usbhsg_set_selfpowered,
901 .udc_start = usbhsg_gadget_start,
902 .udc_stop = usbhsg_gadget_stop,
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
922static void usbhs_mod_gadget_release(struct device *pdev)
923{
924 /* do nothing */
925}
926
927int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
928{
929 struct usbhsg_gpriv *gpriv;
930 struct usbhsg_uep *uep;
931 struct device *dev = usbhs_priv_to_dev(priv);
932 int pipe_size = usbhs_get_dparam(priv, pipe_size);
933 int i;
934 int ret;
935
936 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
937 if (!gpriv) {
938 dev_err(dev, "Could not allocate gadget priv\n");
939 return -ENOMEM;
940 }
941
942 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
943 if (!uep) {
944 dev_err(dev, "Could not allocate ep\n");
945 ret = -ENOMEM;
946 goto usbhs_mod_gadget_probe_err_gpriv;
947 }
948
949 /*
950 * CAUTION
951 *
952 * There is no guarantee that it is possible to access usb module here.
953 * Don't accesses to it.
954 * The accesse will be enable after "usbhsg_start"
955 */
956
957 /*
958 * register itself
959 */
960 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
961
962 /* init gpriv */
963 gpriv->mod.name = "gadget";
964 gpriv->mod.start = usbhsg_start;
965 gpriv->mod.stop = usbhsg_stop;
966 gpriv->uep = uep;
967 gpriv->uep_size = pipe_size;
968 usbhsg_status_init(gpriv);
969
970 /*
971 * init gadget
972 */
973 dev_set_name(&gpriv->gadget.dev, "gadget");
974 gpriv->gadget.dev.parent = dev;
975 gpriv->gadget.dev.release = usbhs_mod_gadget_release;
976 gpriv->gadget.name = "renesas_usbhs_udc";
977 gpriv->gadget.ops = &usbhsg_gadget_ops;
978 gpriv->gadget.max_speed = USB_SPEED_HIGH;
979 ret = device_register(&gpriv->gadget.dev);
980 if (ret < 0)
981 goto err_add_udc;
982
983 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
984
985 /*
986 * init usb_ep
987 */
988 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
989 uep->gpriv = gpriv;
990 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
991
992 uep->ep.name = uep->ep_name;
993 uep->ep.ops = &usbhsg_ep_ops;
994 INIT_LIST_HEAD(&uep->ep.ep_list);
995
996 /* init DCP */
997 if (usbhsg_is_dcp(uep)) {
998 gpriv->gadget.ep0 = &uep->ep;
999 uep->ep.maxpacket = 64;
1000 }
1001 /* init normal pipe */
1002 else {
1003 uep->ep.maxpacket = 512;
1004 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1005 }
1006 }
1007
1008 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1009 if (ret)
1010 goto err_register;
1011
1012
1013 dev_info(dev, "gadget probed\n");
1014
1015 return 0;
1016
1017err_register:
1018 device_unregister(&gpriv->gadget.dev);
1019err_add_udc:
1020 kfree(gpriv->uep);
1021
1022usbhs_mod_gadget_probe_err_gpriv:
1023 kfree(gpriv);
1024
1025 return ret;
1026}
1027
1028void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1029{
1030 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1031
1032 usb_del_gadget_udc(&gpriv->gadget);
1033
1034 device_unregister(&gpriv->gadget.dev);
1035
1036 kfree(gpriv->uep);
1037 kfree(gpriv);
1038}