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