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1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8 */
9#include <linux/delay.h>
10#include <linux/dma-mapping.h>
11#include <linux/io.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/usb/ch9.h>
15#include <linux/usb/gadget.h>
16#include <linux/usb/otg.h>
17#include "common.h"
18
19/*
20 * struct
21 */
22struct usbhsg_request {
23 struct usb_request req;
24 struct usbhs_pkt pkt;
25};
26
27#define EP_NAME_SIZE 8
28struct usbhsg_gpriv;
29struct usbhsg_uep {
30 struct usb_ep ep;
31 struct usbhs_pipe *pipe;
32 spinlock_t lock; /* protect the pipe */
33
34 char ep_name[EP_NAME_SIZE];
35
36 struct usbhsg_gpriv *gpriv;
37};
38
39struct usbhsg_gpriv {
40 struct usb_gadget gadget;
41 struct usbhs_mod mod;
42
43 struct usbhsg_uep *uep;
44 int uep_size;
45
46 struct usb_gadget_driver *driver;
47 struct usb_phy *transceiver;
48 bool vbus_active;
49
50 u32 status;
51#define USBHSG_STATUS_STARTED (1 << 0)
52#define USBHSG_STATUS_REGISTERD (1 << 1)
53#define USBHSG_STATUS_WEDGE (1 << 2)
54#define USBHSG_STATUS_SELF_POWERED (1 << 3)
55#define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
56};
57
58struct usbhsg_recip_handle {
59 char *name;
60 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
61 struct usb_ctrlrequest *ctrl);
62 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
63 struct usb_ctrlrequest *ctrl);
64 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
65 struct usb_ctrlrequest *ctrl);
66};
67
68/*
69 * macro
70 */
71#define usbhsg_priv_to_gpriv(priv) \
72 container_of( \
73 usbhs_mod_get(priv, USBHS_GADGET), \
74 struct usbhsg_gpriv, mod)
75
76#define __usbhsg_for_each_uep(start, pos, g, i) \
77 for ((i) = start; \
78 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
79 (i)++)
80
81#define usbhsg_for_each_uep(pos, gpriv, i) \
82 __usbhsg_for_each_uep(1, pos, gpriv, i)
83
84#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
85 __usbhsg_for_each_uep(0, pos, gpriv, i)
86
87#define usbhsg_gadget_to_gpriv(g)\
88 container_of(g, struct usbhsg_gpriv, gadget)
89
90#define usbhsg_req_to_ureq(r)\
91 container_of(r, struct usbhsg_request, req)
92
93#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
94#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
95#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
96#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
97#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
98#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
99#define usbhsg_uep_to_pipe(u) ((u)->pipe)
100#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
101#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
102
103#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
104#define usbhsg_pkt_to_ureq(i) \
105 container_of(i, struct usbhsg_request, pkt)
106
107#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
108
109/* status */
110#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
111#define usbhsg_status_set(gp, b) (gp->status |= b)
112#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
113#define usbhsg_status_has(gp, b) (gp->status & b)
114
115/*
116 * queue push/pop
117 */
118static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
119 struct usbhsg_request *ureq,
120 int status)
121{
122 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
123 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
124 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
125 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
126
127 if (pipe)
128 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
129
130 ureq->req.status = status;
131 spin_unlock(usbhs_priv_to_lock(priv));
132 usb_gadget_giveback_request(&uep->ep, &ureq->req);
133 spin_lock(usbhs_priv_to_lock(priv));
134}
135
136static void usbhsg_queue_pop(struct usbhsg_uep *uep,
137 struct usbhsg_request *ureq,
138 int status)
139{
140 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
141 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
142 unsigned long flags;
143
144 usbhs_lock(priv, flags);
145 __usbhsg_queue_pop(uep, ureq, status);
146 usbhs_unlock(priv, flags);
147}
148
149static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
150{
151 struct usbhs_pipe *pipe = pkt->pipe;
152 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
153 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
154 unsigned long flags;
155
156 ureq->req.actual = pkt->actual;
157
158 usbhs_lock(priv, flags);
159 if (uep)
160 __usbhsg_queue_pop(uep, ureq, 0);
161 usbhs_unlock(priv, flags);
162}
163
164static void usbhsg_queue_push(struct usbhsg_uep *uep,
165 struct usbhsg_request *ureq)
166{
167 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
168 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
169 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
170 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
171 struct usb_request *req = &ureq->req;
172
173 req->actual = 0;
174 req->status = -EINPROGRESS;
175 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
176 req->buf, req->length, req->zero, -1);
177 usbhs_pkt_start(pipe);
178
179 dev_dbg(dev, "pipe %d : queue push (%d)\n",
180 usbhs_pipe_number(pipe),
181 req->length);
182}
183
184/*
185 * dma map/unmap
186 */
187static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
188 int map)
189{
190 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
191 struct usb_request *req = &ureq->req;
192 struct usbhs_pipe *pipe = pkt->pipe;
193 enum dma_data_direction dir;
194 int ret = 0;
195
196 dir = usbhs_pipe_is_dir_host(pipe);
197
198 if (map) {
199 /* it can not use scatter/gather */
200 WARN_ON(req->num_sgs);
201
202 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
203 if (ret < 0)
204 return ret;
205
206 pkt->dma = req->dma;
207 } else {
208 usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
209 }
210
211 return ret;
212}
213
214/*
215 * USB_TYPE_STANDARD / clear feature functions
216 */
217static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
218 struct usbhsg_uep *uep,
219 struct usb_ctrlrequest *ctrl)
220{
221 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
222 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
223 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
224
225 usbhs_dcp_control_transfer_done(pipe);
226
227 return 0;
228}
229
230static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
231 struct usbhsg_uep *uep,
232 struct usb_ctrlrequest *ctrl)
233{
234 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
235 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
236
237 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
238 usbhs_pipe_disable(pipe);
239 usbhs_pipe_sequence_data0(pipe);
240 usbhs_pipe_enable(pipe);
241 }
242
243 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
244
245 usbhs_pkt_start(pipe);
246
247 return 0;
248}
249
250static struct usbhsg_recip_handle req_clear_feature = {
251 .name = "clear feature",
252 .device = usbhsg_recip_handler_std_control_done,
253 .interface = usbhsg_recip_handler_std_control_done,
254 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
255};
256
257/*
258 * USB_TYPE_STANDARD / set feature functions
259 */
260static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
261 struct usbhsg_uep *uep,
262 struct usb_ctrlrequest *ctrl)
263{
264 switch (le16_to_cpu(ctrl->wValue)) {
265 case USB_DEVICE_TEST_MODE:
266 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
267 udelay(100);
268 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex) >> 8);
269 break;
270 default:
271 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
272 break;
273 }
274
275 return 0;
276}
277
278static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
279 struct usbhsg_uep *uep,
280 struct usb_ctrlrequest *ctrl)
281{
282 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
283
284 usbhs_pipe_stall(pipe);
285
286 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
287
288 return 0;
289}
290
291static struct usbhsg_recip_handle req_set_feature = {
292 .name = "set feature",
293 .device = usbhsg_recip_handler_std_set_device,
294 .interface = usbhsg_recip_handler_std_control_done,
295 .endpoint = usbhsg_recip_handler_std_set_endpoint,
296};
297
298/*
299 * USB_TYPE_STANDARD / get status functions
300 */
301static void __usbhsg_recip_send_complete(struct usb_ep *ep,
302 struct usb_request *req)
303{
304 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
305
306 /* free allocated recip-buffer/usb_request */
307 kfree(ureq->pkt.buf);
308 usb_ep_free_request(ep, req);
309}
310
311static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
312 unsigned short status)
313{
314 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
315 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
316 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
317 struct usb_request *req;
318 __le16 *buf;
319
320 /* alloc new usb_request for recip */
321 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
322 if (!req) {
323 dev_err(dev, "recip request allocation fail\n");
324 return;
325 }
326
327 /* alloc recip data buffer */
328 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
329 if (!buf) {
330 usb_ep_free_request(&dcp->ep, req);
331 return;
332 }
333
334 /* recip data is status */
335 *buf = cpu_to_le16(status);
336
337 /* allocated usb_request/buffer will be freed */
338 req->complete = __usbhsg_recip_send_complete;
339 req->buf = buf;
340 req->length = sizeof(*buf);
341 req->zero = 0;
342
343 /* push packet */
344 pipe->handler = &usbhs_fifo_pio_push_handler;
345 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
346}
347
348static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
349 struct usbhsg_uep *uep,
350 struct usb_ctrlrequest *ctrl)
351{
352 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
353 unsigned short status = 0;
354
355 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
356 status = 1 << USB_DEVICE_SELF_POWERED;
357
358 __usbhsg_recip_send_status(gpriv, status);
359
360 return 0;
361}
362
363static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
364 struct usbhsg_uep *uep,
365 struct usb_ctrlrequest *ctrl)
366{
367 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
368 unsigned short status = 0;
369
370 __usbhsg_recip_send_status(gpriv, status);
371
372 return 0;
373}
374
375static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
376 struct usbhsg_uep *uep,
377 struct usb_ctrlrequest *ctrl)
378{
379 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
380 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
381 unsigned short status = 0;
382
383 if (usbhs_pipe_is_stall(pipe))
384 status = 1 << USB_ENDPOINT_HALT;
385
386 __usbhsg_recip_send_status(gpriv, status);
387
388 return 0;
389}
390
391static struct usbhsg_recip_handle req_get_status = {
392 .name = "get status",
393 .device = usbhsg_recip_handler_std_get_device,
394 .interface = usbhsg_recip_handler_std_get_interface,
395 .endpoint = usbhsg_recip_handler_std_get_endpoint,
396};
397
398/*
399 * USB_TYPE handler
400 */
401static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
402 struct usbhsg_recip_handle *handler,
403 struct usb_ctrlrequest *ctrl)
404{
405 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
406 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
407 struct usbhsg_uep *uep;
408 struct usbhs_pipe *pipe;
409 int recip = ctrl->bRequestType & USB_RECIP_MASK;
410 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
411 int ret = 0;
412 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
413 struct usb_ctrlrequest *ctrl);
414 char *msg;
415
416 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
417 pipe = usbhsg_uep_to_pipe(uep);
418 if (!pipe) {
419 dev_err(dev, "wrong recip request\n");
420 return -EINVAL;
421 }
422
423 switch (recip) {
424 case USB_RECIP_DEVICE:
425 msg = "DEVICE";
426 func = handler->device;
427 break;
428 case USB_RECIP_INTERFACE:
429 msg = "INTERFACE";
430 func = handler->interface;
431 break;
432 case USB_RECIP_ENDPOINT:
433 msg = "ENDPOINT";
434 func = handler->endpoint;
435 break;
436 default:
437 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
438 func = NULL;
439 ret = -EINVAL;
440 }
441
442 if (func) {
443 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
444 ret = func(priv, uep, ctrl);
445 }
446
447 return ret;
448}
449
450/*
451 * irq functions
452 *
453 * it will be called from usbhs_interrupt
454 */
455static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
456 struct usbhs_irq_state *irq_state)
457{
458 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
459 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
460 int state = usbhs_status_get_device_state(irq_state);
461
462 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
463
464 dev_dbg(dev, "state = %x : speed : %d\n", state, gpriv->gadget.speed);
465
466 if (gpriv->gadget.speed != USB_SPEED_UNKNOWN &&
467 (state & SUSPENDED_STATE)) {
468 if (gpriv->driver && gpriv->driver->suspend)
469 gpriv->driver->suspend(&gpriv->gadget);
470 usb_gadget_set_state(&gpriv->gadget, USB_STATE_SUSPENDED);
471 }
472
473 return 0;
474}
475
476static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
477 struct usbhs_irq_state *irq_state)
478{
479 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
480 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
481 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
482 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
483 struct usb_ctrlrequest ctrl;
484 struct usbhsg_recip_handle *recip_handler = NULL;
485 int stage = usbhs_status_get_ctrl_stage(irq_state);
486 int ret = 0;
487
488 dev_dbg(dev, "stage = %d\n", stage);
489
490 /*
491 * see Manual
492 *
493 * "Operation"
494 * - "Interrupt Function"
495 * - "Control Transfer Stage Transition Interrupt"
496 * - Fig. "Control Transfer Stage Transitions"
497 */
498
499 switch (stage) {
500 case READ_DATA_STAGE:
501 pipe->handler = &usbhs_fifo_pio_push_handler;
502 break;
503 case WRITE_DATA_STAGE:
504 pipe->handler = &usbhs_fifo_pio_pop_handler;
505 break;
506 case NODATA_STATUS_STAGE:
507 pipe->handler = &usbhs_ctrl_stage_end_handler;
508 break;
509 case READ_STATUS_STAGE:
510 case WRITE_STATUS_STAGE:
511 usbhs_dcp_control_transfer_done(pipe);
512 fallthrough;
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;
640 unsigned long flags;
641
642 spin_lock_irqsave(&uep->lock, flags);
643 pipe = usbhsg_uep_to_pipe(uep);
644 if (!pipe)
645 goto out;
646
647 usbhsg_pipe_disable(uep);
648 usbhs_pipe_free(pipe);
649
650 uep->pipe->mod_private = NULL;
651 uep->pipe = NULL;
652
653out:
654 spin_unlock_irqrestore(&uep->lock, flags);
655
656 return 0;
657}
658
659static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
660 gfp_t gfp_flags)
661{
662 struct usbhsg_request *ureq;
663
664 ureq = kzalloc(sizeof *ureq, gfp_flags);
665 if (!ureq)
666 return NULL;
667
668 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
669
670 return &ureq->req;
671}
672
673static void usbhsg_ep_free_request(struct usb_ep *ep,
674 struct usb_request *req)
675{
676 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
677
678 WARN_ON(!list_empty(&ureq->pkt.node));
679 kfree(ureq);
680}
681
682static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
683 gfp_t gfp_flags)
684{
685 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
686 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
687 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
688 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
689
690 /* param check */
691 if (usbhsg_is_not_connected(gpriv) ||
692 unlikely(!gpriv->driver) ||
693 unlikely(!pipe))
694 return -ESHUTDOWN;
695
696 usbhsg_queue_push(uep, ureq);
697
698 return 0;
699}
700
701static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
702{
703 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
704 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
705 struct usbhs_pipe *pipe;
706 unsigned long flags;
707
708 spin_lock_irqsave(&uep->lock, flags);
709 pipe = usbhsg_uep_to_pipe(uep);
710 if (pipe)
711 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
712
713 /*
714 * To dequeue a request, this driver should call the usbhsg_queue_pop()
715 * even if the pipe is NULL.
716 */
717 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
718 spin_unlock_irqrestore(&uep->lock, flags);
719
720 return 0;
721}
722
723static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
724{
725 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
726 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
727 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
728 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
729 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
730 unsigned long flags;
731 int ret = 0;
732
733 dev_dbg(dev, "set halt %d (pipe %d)\n",
734 halt, usbhs_pipe_number(pipe));
735
736 /******************** spin lock ********************/
737 usbhs_lock(priv, flags);
738
739 /*
740 * According to usb_ep_set_halt()'s description, this function should
741 * return -EAGAIN if the IN endpoint has any queue or data. Note
742 * that the usbhs_pipe_is_dir_in() returns false if the pipe is an
743 * IN endpoint in the gadget mode.
744 */
745 if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) ||
746 usbhs_pipe_contains_transmittable_data(pipe))) {
747 ret = -EAGAIN;
748 goto out;
749 }
750
751 if (halt)
752 usbhs_pipe_stall(pipe);
753 else
754 usbhs_pipe_disable(pipe);
755
756 if (halt && wedge)
757 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
758 else
759 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
760
761out:
762 usbhs_unlock(priv, flags);
763 /******************** spin unlock ******************/
764
765 return ret;
766}
767
768static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
769{
770 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
771}
772
773static int usbhsg_ep_set_wedge(struct usb_ep *ep)
774{
775 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
776}
777
778static const struct usb_ep_ops usbhsg_ep_ops = {
779 .enable = usbhsg_ep_enable,
780 .disable = usbhsg_ep_disable,
781
782 .alloc_request = usbhsg_ep_alloc_request,
783 .free_request = usbhsg_ep_free_request,
784
785 .queue = usbhsg_ep_queue,
786 .dequeue = usbhsg_ep_dequeue,
787
788 .set_halt = usbhsg_ep_set_halt,
789 .set_wedge = usbhsg_ep_set_wedge,
790};
791
792/*
793 * pullup control
794 */
795static int usbhsg_can_pullup(struct usbhs_priv *priv)
796{
797 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
798
799 return gpriv->driver &&
800 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
801}
802
803static void usbhsg_update_pullup(struct usbhs_priv *priv)
804{
805 if (usbhsg_can_pullup(priv))
806 usbhs_sys_function_pullup(priv, 1);
807 else
808 usbhs_sys_function_pullup(priv, 0);
809}
810
811/*
812 * usb module start/end
813 */
814static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
815{
816 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
817 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
818 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
819 struct device *dev = usbhs_priv_to_dev(priv);
820 unsigned long flags;
821 int ret = 0;
822
823 /******************** spin lock ********************/
824 usbhs_lock(priv, flags);
825
826 usbhsg_status_set(gpriv, status);
827 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
828 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
829 ret = -1; /* not ready */
830
831 usbhs_unlock(priv, flags);
832 /******************** spin unlock ********************/
833
834 if (ret < 0)
835 return 0; /* not ready is not error */
836
837 /*
838 * enable interrupt and systems if ready
839 */
840 dev_dbg(dev, "start gadget\n");
841
842 /*
843 * pipe initialize and enable DCP
844 */
845 usbhs_fifo_init(priv);
846 usbhs_pipe_init(priv,
847 usbhsg_dma_map_ctrl);
848
849 /* dcp init instead of usbhsg_ep_enable() */
850 dcp->pipe = usbhs_dcp_malloc(priv);
851 dcp->pipe->mod_private = dcp;
852 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
853
854 /*
855 * system config enble
856 * - HI speed
857 * - function
858 * - usb module
859 */
860 usbhs_sys_function_ctrl(priv, 1);
861 usbhsg_update_pullup(priv);
862
863 /*
864 * enable irq callback
865 */
866 mod->irq_dev_state = usbhsg_irq_dev_state;
867 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
868 usbhs_irq_callback_update(priv, mod);
869
870 return 0;
871}
872
873static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
874{
875 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
876 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
877 struct usbhsg_uep *uep;
878 struct device *dev = usbhs_priv_to_dev(priv);
879 unsigned long flags;
880 int ret = 0, i;
881
882 /******************** spin lock ********************/
883 usbhs_lock(priv, flags);
884
885 usbhsg_status_clr(gpriv, status);
886 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
887 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
888 ret = -1; /* already done */
889
890 usbhs_unlock(priv, flags);
891 /******************** spin unlock ********************/
892
893 if (ret < 0)
894 return 0; /* already done is not error */
895
896 /*
897 * disable interrupt and systems if 1st try
898 */
899 usbhs_fifo_quit(priv);
900
901 /* disable all irq */
902 mod->irq_dev_state = NULL;
903 mod->irq_ctrl_stage = NULL;
904 usbhs_irq_callback_update(priv, mod);
905
906 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
907
908 /* disable sys */
909 usbhs_sys_set_test_mode(priv, 0);
910 usbhs_sys_function_ctrl(priv, 0);
911
912 /* disable all eps */
913 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
914 usbhsg_ep_disable(&uep->ep);
915
916 dev_dbg(dev, "stop gadget\n");
917
918 return 0;
919}
920
921/*
922 * VBUS provided by the PHY
923 */
924static int usbhsm_phy_get_vbus(struct platform_device *pdev)
925{
926 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
927 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
928
929 return gpriv->vbus_active;
930}
931
932static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
933{
934 struct usbhs_mod_info *info = &priv->mod_info;
935
936 info->irq_vbus = NULL;
937 info->get_vbus = usbhsm_phy_get_vbus;
938
939 usbhs_irq_callback_update(priv, NULL);
940}
941
942/*
943 *
944 * linux usb function
945 *
946 */
947static int usbhsg_gadget_start(struct usb_gadget *gadget,
948 struct usb_gadget_driver *driver)
949{
950 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
951 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
952 struct device *dev = usbhs_priv_to_dev(priv);
953 int ret;
954
955 if (!driver ||
956 !driver->setup ||
957 driver->max_speed < USB_SPEED_FULL)
958 return -EINVAL;
959
960 /* connect to bus through transceiver */
961 if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
962 ret = otg_set_peripheral(gpriv->transceiver->otg,
963 &gpriv->gadget);
964 if (ret) {
965 dev_err(dev, "%s: can't bind to transceiver\n",
966 gpriv->gadget.name);
967 return ret;
968 }
969
970 /* get vbus using phy versions */
971 usbhs_mod_phy_mode(priv);
972 }
973
974 /* first hook up the driver ... */
975 gpriv->driver = driver;
976
977 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
978}
979
980static int usbhsg_gadget_stop(struct usb_gadget *gadget)
981{
982 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
983 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
984
985 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
986
987 if (!IS_ERR_OR_NULL(gpriv->transceiver))
988 otg_set_peripheral(gpriv->transceiver->otg, NULL);
989
990 gpriv->driver = NULL;
991
992 return 0;
993}
994
995/*
996 * usb gadget ops
997 */
998static int usbhsg_get_frame(struct usb_gadget *gadget)
999{
1000 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1001 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1002
1003 return usbhs_frame_get_num(priv);
1004}
1005
1006static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
1007{
1008 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1009 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1010 unsigned long flags;
1011
1012 usbhs_lock(priv, flags);
1013 if (is_on)
1014 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1015 else
1016 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1017 usbhsg_update_pullup(priv);
1018 usbhs_unlock(priv, flags);
1019
1020 return 0;
1021}
1022
1023static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1024{
1025 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1026
1027 if (is_self)
1028 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1029 else
1030 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1031
1032 gadget->is_selfpowered = (is_self != 0);
1033
1034 return 0;
1035}
1036
1037static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1038{
1039 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1040 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1041 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1042
1043 gpriv->vbus_active = !!is_active;
1044
1045 usbhsc_schedule_notify_hotplug(pdev);
1046
1047 return 0;
1048}
1049
1050static const struct usb_gadget_ops usbhsg_gadget_ops = {
1051 .get_frame = usbhsg_get_frame,
1052 .set_selfpowered = usbhsg_set_selfpowered,
1053 .udc_start = usbhsg_gadget_start,
1054 .udc_stop = usbhsg_gadget_stop,
1055 .pullup = usbhsg_pullup,
1056 .vbus_session = usbhsg_vbus_session,
1057};
1058
1059static int usbhsg_start(struct usbhs_priv *priv)
1060{
1061 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1062}
1063
1064static int usbhsg_stop(struct usbhs_priv *priv)
1065{
1066 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1067
1068 /* cable disconnect */
1069 if (gpriv->driver &&
1070 gpriv->driver->disconnect)
1071 gpriv->driver->disconnect(&gpriv->gadget);
1072
1073 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1074}
1075
1076int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1077{
1078 struct usbhsg_gpriv *gpriv;
1079 struct usbhsg_uep *uep;
1080 struct device *dev = usbhs_priv_to_dev(priv);
1081 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1082 usbhs_get_dparam(priv, pipe_configs);
1083 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1084 int i;
1085 int ret;
1086
1087 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1088 if (!gpriv)
1089 return -ENOMEM;
1090
1091 uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL);
1092 if (!uep) {
1093 ret = -ENOMEM;
1094 goto usbhs_mod_gadget_probe_err_gpriv;
1095 }
1096
1097 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1098 dev_info(dev, "%stransceiver found\n",
1099 !IS_ERR(gpriv->transceiver) ? "" : "no ");
1100
1101 /*
1102 * CAUTION
1103 *
1104 * There is no guarantee that it is possible to access usb module here.
1105 * Don't accesses to it.
1106 * The accesse will be enable after "usbhsg_start"
1107 */
1108
1109 /*
1110 * register itself
1111 */
1112 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1113
1114 /* init gpriv */
1115 gpriv->mod.name = "gadget";
1116 gpriv->mod.start = usbhsg_start;
1117 gpriv->mod.stop = usbhsg_stop;
1118 gpriv->uep = uep;
1119 gpriv->uep_size = pipe_size;
1120 usbhsg_status_init(gpriv);
1121
1122 /*
1123 * init gadget
1124 */
1125 gpriv->gadget.dev.parent = dev;
1126 gpriv->gadget.name = "renesas_usbhs_udc";
1127 gpriv->gadget.ops = &usbhsg_gadget_ops;
1128 gpriv->gadget.max_speed = USB_SPEED_HIGH;
1129 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1130 has_usb_dmac);
1131
1132 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1133
1134 /*
1135 * init usb_ep
1136 */
1137 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1138 uep->gpriv = gpriv;
1139 uep->pipe = NULL;
1140 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1141
1142 uep->ep.name = uep->ep_name;
1143 uep->ep.ops = &usbhsg_ep_ops;
1144 INIT_LIST_HEAD(&uep->ep.ep_list);
1145 spin_lock_init(&uep->lock);
1146
1147 /* init DCP */
1148 if (usbhsg_is_dcp(uep)) {
1149 gpriv->gadget.ep0 = &uep->ep;
1150 usb_ep_set_maxpacket_limit(&uep->ep, 64);
1151 uep->ep.caps.type_control = true;
1152 } else {
1153 /* init normal pipe */
1154 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1155 uep->ep.caps.type_iso = true;
1156 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1157 uep->ep.caps.type_bulk = true;
1158 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1159 uep->ep.caps.type_int = true;
1160 usb_ep_set_maxpacket_limit(&uep->ep,
1161 pipe_configs[i].bufsize);
1162 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1163 }
1164 uep->ep.caps.dir_in = true;
1165 uep->ep.caps.dir_out = true;
1166 }
1167
1168 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1169 if (ret)
1170 goto err_add_udc;
1171
1172
1173 dev_info(dev, "gadget probed\n");
1174
1175 return 0;
1176
1177err_add_udc:
1178 kfree(gpriv->uep);
1179
1180usbhs_mod_gadget_probe_err_gpriv:
1181 kfree(gpriv);
1182
1183 return ret;
1184}
1185
1186void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1187{
1188 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1189
1190 usb_del_gadget_udc(&gpriv->gadget);
1191
1192 kfree(gpriv->uep);
1193 kfree(gpriv);
1194}
1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8#include <linux/delay.h>
9#include <linux/dma-mapping.h>
10#include <linux/io.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/usb/ch9.h>
14#include <linux/usb/gadget.h>
15#include <linux/usb/otg.h>
16#include "common.h"
17
18/*
19 * struct
20 */
21struct usbhsg_request {
22 struct usb_request req;
23 struct usbhs_pkt pkt;
24};
25
26#define EP_NAME_SIZE 8
27struct usbhsg_gpriv;
28struct usbhsg_uep {
29 struct usb_ep ep;
30 struct usbhs_pipe *pipe;
31 spinlock_t lock; /* protect the pipe */
32
33 char ep_name[EP_NAME_SIZE];
34
35 struct usbhsg_gpriv *gpriv;
36};
37
38struct usbhsg_gpriv {
39 struct usb_gadget gadget;
40 struct usbhs_mod mod;
41
42 struct usbhsg_uep *uep;
43 int uep_size;
44
45 struct usb_gadget_driver *driver;
46 struct usb_phy *transceiver;
47 bool vbus_active;
48
49 u32 status;
50#define USBHSG_STATUS_STARTED (1 << 0)
51#define USBHSG_STATUS_REGISTERD (1 << 1)
52#define USBHSG_STATUS_WEDGE (1 << 2)
53#define USBHSG_STATUS_SELF_POWERED (1 << 3)
54#define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
55};
56
57struct usbhsg_recip_handle {
58 char *name;
59 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
60 struct usb_ctrlrequest *ctrl);
61 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
62 struct usb_ctrlrequest *ctrl);
63 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
64 struct usb_ctrlrequest *ctrl);
65};
66
67/*
68 * macro
69 */
70#define usbhsg_priv_to_gpriv(priv) \
71 container_of( \
72 usbhs_mod_get(priv, USBHS_GADGET), \
73 struct usbhsg_gpriv, mod)
74
75#define __usbhsg_for_each_uep(start, pos, g, i) \
76 for ((i) = start; \
77 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
78 (i)++)
79
80#define usbhsg_for_each_uep(pos, gpriv, i) \
81 __usbhsg_for_each_uep(1, pos, gpriv, i)
82
83#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
84 __usbhsg_for_each_uep(0, pos, gpriv, i)
85
86#define usbhsg_gadget_to_gpriv(g)\
87 container_of(g, struct usbhsg_gpriv, gadget)
88
89#define usbhsg_req_to_ureq(r)\
90 container_of(r, struct usbhsg_request, req)
91
92#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
93#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
94#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
95#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
96#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
97#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
98#define usbhsg_uep_to_pipe(u) ((u)->pipe)
99#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
100#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
101
102#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
103#define usbhsg_pkt_to_ureq(i) \
104 container_of(i, struct usbhsg_request, pkt)
105
106#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
107
108/* status */
109#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
110#define usbhsg_status_set(gp, b) (gp->status |= b)
111#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
112#define usbhsg_status_has(gp, b) (gp->status & b)
113
114/*
115 * queue push/pop
116 */
117static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
118 struct usbhsg_request *ureq,
119 int status)
120{
121 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
122 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
123 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
124 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
125
126 if (pipe)
127 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
128
129 ureq->req.status = status;
130 spin_unlock(usbhs_priv_to_lock(priv));
131 usb_gadget_giveback_request(&uep->ep, &ureq->req);
132 spin_lock(usbhs_priv_to_lock(priv));
133}
134
135static void usbhsg_queue_pop(struct usbhsg_uep *uep,
136 struct usbhsg_request *ureq,
137 int status)
138{
139 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
140 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
141 unsigned long flags;
142
143 usbhs_lock(priv, flags);
144 __usbhsg_queue_pop(uep, ureq, status);
145 usbhs_unlock(priv, flags);
146}
147
148static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
149{
150 struct usbhs_pipe *pipe = pkt->pipe;
151 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
152 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
153 unsigned long flags;
154
155 ureq->req.actual = pkt->actual;
156
157 usbhs_lock(priv, flags);
158 if (uep)
159 __usbhsg_queue_pop(uep, ureq, 0);
160 usbhs_unlock(priv, flags);
161}
162
163static void usbhsg_queue_push(struct usbhsg_uep *uep,
164 struct usbhsg_request *ureq)
165{
166 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
167 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
168 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
169 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
170 struct usb_request *req = &ureq->req;
171
172 req->actual = 0;
173 req->status = -EINPROGRESS;
174 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
175 req->buf, req->length, req->zero, -1);
176 usbhs_pkt_start(pipe);
177
178 dev_dbg(dev, "pipe %d : queue push (%d)\n",
179 usbhs_pipe_number(pipe),
180 req->length);
181}
182
183/*
184 * dma map/unmap
185 */
186static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
187 int map)
188{
189 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
190 struct usb_request *req = &ureq->req;
191 struct usbhs_pipe *pipe = pkt->pipe;
192 enum dma_data_direction dir;
193 int ret = 0;
194
195 dir = usbhs_pipe_is_dir_host(pipe);
196
197 if (map) {
198 /* it can not use scatter/gather */
199 WARN_ON(req->num_sgs);
200
201 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
202 if (ret < 0)
203 return ret;
204
205 pkt->dma = req->dma;
206 } else {
207 usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
208 }
209
210 return ret;
211}
212
213/*
214 * USB_TYPE_STANDARD / clear feature functions
215 */
216static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
217 struct usbhsg_uep *uep,
218 struct usb_ctrlrequest *ctrl)
219{
220 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
221 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
222 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
223
224 usbhs_dcp_control_transfer_done(pipe);
225
226 return 0;
227}
228
229static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
230 struct usbhsg_uep *uep,
231 struct usb_ctrlrequest *ctrl)
232{
233 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
234 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
235
236 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
237 usbhs_pipe_disable(pipe);
238 usbhs_pipe_sequence_data0(pipe);
239 usbhs_pipe_enable(pipe);
240 }
241
242 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
243
244 usbhs_pkt_start(pipe);
245
246 return 0;
247}
248
249static struct usbhsg_recip_handle req_clear_feature = {
250 .name = "clear feature",
251 .device = usbhsg_recip_handler_std_control_done,
252 .interface = usbhsg_recip_handler_std_control_done,
253 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
254};
255
256/*
257 * USB_TYPE_STANDARD / set feature functions
258 */
259static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
260 struct usbhsg_uep *uep,
261 struct usb_ctrlrequest *ctrl)
262{
263 switch (le16_to_cpu(ctrl->wValue)) {
264 case USB_DEVICE_TEST_MODE:
265 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
266 udelay(100);
267 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
268 break;
269 default:
270 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
271 break;
272 }
273
274 return 0;
275}
276
277static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
278 struct usbhsg_uep *uep,
279 struct usb_ctrlrequest *ctrl)
280{
281 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
282
283 usbhs_pipe_stall(pipe);
284
285 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
286
287 return 0;
288}
289
290static struct usbhsg_recip_handle req_set_feature = {
291 .name = "set feature",
292 .device = usbhsg_recip_handler_std_set_device,
293 .interface = usbhsg_recip_handler_std_control_done,
294 .endpoint = usbhsg_recip_handler_std_set_endpoint,
295};
296
297/*
298 * USB_TYPE_STANDARD / get status functions
299 */
300static void __usbhsg_recip_send_complete(struct usb_ep *ep,
301 struct usb_request *req)
302{
303 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
304
305 /* free allocated recip-buffer/usb_request */
306 kfree(ureq->pkt.buf);
307 usb_ep_free_request(ep, req);
308}
309
310static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
311 unsigned short status)
312{
313 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
314 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
315 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
316 struct usb_request *req;
317 unsigned short *buf;
318
319 /* alloc new usb_request for recip */
320 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
321 if (!req) {
322 dev_err(dev, "recip request allocation fail\n");
323 return;
324 }
325
326 /* alloc recip data buffer */
327 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
328 if (!buf) {
329 usb_ep_free_request(&dcp->ep, req);
330 return;
331 }
332
333 /* recip data is status */
334 *buf = cpu_to_le16(status);
335
336 /* allocated usb_request/buffer will be freed */
337 req->complete = __usbhsg_recip_send_complete;
338 req->buf = buf;
339 req->length = sizeof(*buf);
340 req->zero = 0;
341
342 /* push packet */
343 pipe->handler = &usbhs_fifo_pio_push_handler;
344 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
345}
346
347static int usbhsg_recip_handler_std_get_device(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 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
355 status = 1 << USB_DEVICE_SELF_POWERED;
356
357 __usbhsg_recip_send_status(gpriv, status);
358
359 return 0;
360}
361
362static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
363 struct usbhsg_uep *uep,
364 struct usb_ctrlrequest *ctrl)
365{
366 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
367 unsigned short status = 0;
368
369 __usbhsg_recip_send_status(gpriv, status);
370
371 return 0;
372}
373
374static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
375 struct usbhsg_uep *uep,
376 struct usb_ctrlrequest *ctrl)
377{
378 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
379 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
380 unsigned short status = 0;
381
382 if (usbhs_pipe_is_stall(pipe))
383 status = 1 << USB_ENDPOINT_HALT;
384
385 __usbhsg_recip_send_status(gpriv, status);
386
387 return 0;
388}
389
390static struct usbhsg_recip_handle req_get_status = {
391 .name = "get status",
392 .device = usbhsg_recip_handler_std_get_device,
393 .interface = usbhsg_recip_handler_std_get_interface,
394 .endpoint = usbhsg_recip_handler_std_get_endpoint,
395};
396
397/*
398 * USB_TYPE handler
399 */
400static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
401 struct usbhsg_recip_handle *handler,
402 struct usb_ctrlrequest *ctrl)
403{
404 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
405 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
406 struct usbhsg_uep *uep;
407 struct usbhs_pipe *pipe;
408 int recip = ctrl->bRequestType & USB_RECIP_MASK;
409 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
410 int ret = 0;
411 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
412 struct usb_ctrlrequest *ctrl);
413 char *msg;
414
415 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
416 pipe = usbhsg_uep_to_pipe(uep);
417 if (!pipe) {
418 dev_err(dev, "wrong recip request\n");
419 return -EINVAL;
420 }
421
422 switch (recip) {
423 case USB_RECIP_DEVICE:
424 msg = "DEVICE";
425 func = handler->device;
426 break;
427 case USB_RECIP_INTERFACE:
428 msg = "INTERFACE";
429 func = handler->interface;
430 break;
431 case USB_RECIP_ENDPOINT:
432 msg = "ENDPOINT";
433 func = handler->endpoint;
434 break;
435 default:
436 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
437 func = NULL;
438 ret = -EINVAL;
439 }
440
441 if (func) {
442 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
443 ret = func(priv, uep, ctrl);
444 }
445
446 return ret;
447}
448
449/*
450 * irq functions
451 *
452 * it will be called from usbhs_interrupt
453 */
454static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
455 struct usbhs_irq_state *irq_state)
456{
457 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
458 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
459
460 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
461
462 dev_dbg(dev, "state = %x : speed : %d\n",
463 usbhs_status_get_device_state(irq_state),
464 gpriv->gadget.speed);
465
466 return 0;
467}
468
469static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
470 struct usbhs_irq_state *irq_state)
471{
472 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
473 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
474 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
475 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
476 struct usb_ctrlrequest ctrl;
477 struct usbhsg_recip_handle *recip_handler = NULL;
478 int stage = usbhs_status_get_ctrl_stage(irq_state);
479 int ret = 0;
480
481 dev_dbg(dev, "stage = %d\n", stage);
482
483 /*
484 * see Manual
485 *
486 * "Operation"
487 * - "Interrupt Function"
488 * - "Control Transfer Stage Transition Interrupt"
489 * - Fig. "Control Transfer Stage Transitions"
490 */
491
492 switch (stage) {
493 case READ_DATA_STAGE:
494 pipe->handler = &usbhs_fifo_pio_push_handler;
495 break;
496 case WRITE_DATA_STAGE:
497 pipe->handler = &usbhs_fifo_pio_pop_handler;
498 break;
499 case NODATA_STATUS_STAGE:
500 pipe->handler = &usbhs_ctrl_stage_end_handler;
501 break;
502 case READ_STATUS_STAGE:
503 case WRITE_STATUS_STAGE:
504 usbhs_dcp_control_transfer_done(pipe);
505 default:
506 return ret;
507 }
508
509 /*
510 * get usb request
511 */
512 usbhs_usbreq_get_val(priv, &ctrl);
513
514 switch (ctrl.bRequestType & USB_TYPE_MASK) {
515 case USB_TYPE_STANDARD:
516 switch (ctrl.bRequest) {
517 case USB_REQ_CLEAR_FEATURE:
518 recip_handler = &req_clear_feature;
519 break;
520 case USB_REQ_SET_FEATURE:
521 recip_handler = &req_set_feature;
522 break;
523 case USB_REQ_GET_STATUS:
524 recip_handler = &req_get_status;
525 break;
526 }
527 }
528
529 /*
530 * setup stage / run recip
531 */
532 if (recip_handler)
533 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
534 else
535 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
536
537 if (ret < 0)
538 usbhs_pipe_stall(pipe);
539
540 return ret;
541}
542
543/*
544 *
545 * usb_dcp_ops
546 *
547 */
548static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
549{
550 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
551 struct usbhs_pkt *pkt;
552
553 while (1) {
554 pkt = usbhs_pkt_pop(pipe, NULL);
555 if (!pkt)
556 break;
557
558 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
559 }
560
561 usbhs_pipe_disable(pipe);
562
563 return 0;
564}
565
566/*
567 *
568 * usb_ep_ops
569 *
570 */
571static int usbhsg_ep_enable(struct usb_ep *ep,
572 const struct usb_endpoint_descriptor *desc)
573{
574 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
575 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
576 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
577 struct usbhs_pipe *pipe;
578 int ret = -EIO;
579 unsigned long flags;
580
581 usbhs_lock(priv, flags);
582
583 /*
584 * if it already have pipe,
585 * nothing to do
586 */
587 if (uep->pipe) {
588 usbhs_pipe_clear(uep->pipe);
589 usbhs_pipe_sequence_data0(uep->pipe);
590 ret = 0;
591 goto usbhsg_ep_enable_end;
592 }
593
594 pipe = usbhs_pipe_malloc(priv,
595 usb_endpoint_type(desc),
596 usb_endpoint_dir_in(desc));
597 if (pipe) {
598 uep->pipe = pipe;
599 pipe->mod_private = uep;
600
601 /* set epnum / maxp */
602 usbhs_pipe_config_update(pipe, 0,
603 usb_endpoint_num(desc),
604 usb_endpoint_maxp(desc));
605
606 /*
607 * usbhs_fifo_dma_push/pop_handler try to
608 * use dmaengine if possible.
609 * It will use pio handler if impossible.
610 */
611 if (usb_endpoint_dir_in(desc)) {
612 pipe->handler = &usbhs_fifo_dma_push_handler;
613 } else {
614 pipe->handler = &usbhs_fifo_dma_pop_handler;
615 usbhs_xxxsts_clear(priv, BRDYSTS,
616 usbhs_pipe_number(pipe));
617 }
618
619 ret = 0;
620 }
621
622usbhsg_ep_enable_end:
623 usbhs_unlock(priv, flags);
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;
632 unsigned long flags;
633
634 spin_lock_irqsave(&uep->lock, flags);
635 pipe = usbhsg_uep_to_pipe(uep);
636 if (!pipe)
637 goto out;
638
639 usbhsg_pipe_disable(uep);
640 usbhs_pipe_free(pipe);
641
642 uep->pipe->mod_private = NULL;
643 uep->pipe = NULL;
644
645out:
646 spin_unlock_irqrestore(&uep->lock, flags);
647
648 return 0;
649}
650
651static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
652 gfp_t gfp_flags)
653{
654 struct usbhsg_request *ureq;
655
656 ureq = kzalloc(sizeof *ureq, gfp_flags);
657 if (!ureq)
658 return NULL;
659
660 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
661
662 return &ureq->req;
663}
664
665static void usbhsg_ep_free_request(struct usb_ep *ep,
666 struct usb_request *req)
667{
668 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
669
670 WARN_ON(!list_empty(&ureq->pkt.node));
671 kfree(ureq);
672}
673
674static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
675 gfp_t gfp_flags)
676{
677 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
678 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
679 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
680 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
681
682 /* param check */
683 if (usbhsg_is_not_connected(gpriv) ||
684 unlikely(!gpriv->driver) ||
685 unlikely(!pipe))
686 return -ESHUTDOWN;
687
688 usbhsg_queue_push(uep, ureq);
689
690 return 0;
691}
692
693static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
694{
695 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
696 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
697 struct usbhs_pipe *pipe;
698 unsigned long flags;
699
700 spin_lock_irqsave(&uep->lock, flags);
701 pipe = usbhsg_uep_to_pipe(uep);
702 if (pipe)
703 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
704
705 /*
706 * To dequeue a request, this driver should call the usbhsg_queue_pop()
707 * even if the pipe is NULL.
708 */
709 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
710 spin_unlock_irqrestore(&uep->lock, flags);
711
712 return 0;
713}
714
715static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
716{
717 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
718 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
719 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
720 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
721 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
722 unsigned long flags;
723
724 usbhsg_pipe_disable(uep);
725
726 dev_dbg(dev, "set halt %d (pipe %d)\n",
727 halt, usbhs_pipe_number(pipe));
728
729 /******************** spin lock ********************/
730 usbhs_lock(priv, flags);
731
732 if (halt)
733 usbhs_pipe_stall(pipe);
734 else
735 usbhs_pipe_disable(pipe);
736
737 if (halt && wedge)
738 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
739 else
740 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
741
742 usbhs_unlock(priv, flags);
743 /******************** spin unlock ******************/
744
745 return 0;
746}
747
748static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
749{
750 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
751}
752
753static int usbhsg_ep_set_wedge(struct usb_ep *ep)
754{
755 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
756}
757
758static const struct usb_ep_ops usbhsg_ep_ops = {
759 .enable = usbhsg_ep_enable,
760 .disable = usbhsg_ep_disable,
761
762 .alloc_request = usbhsg_ep_alloc_request,
763 .free_request = usbhsg_ep_free_request,
764
765 .queue = usbhsg_ep_queue,
766 .dequeue = usbhsg_ep_dequeue,
767
768 .set_halt = usbhsg_ep_set_halt,
769 .set_wedge = usbhsg_ep_set_wedge,
770};
771
772/*
773 * pullup control
774 */
775static int usbhsg_can_pullup(struct usbhs_priv *priv)
776{
777 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
778
779 return gpriv->driver &&
780 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
781}
782
783static void usbhsg_update_pullup(struct usbhs_priv *priv)
784{
785 if (usbhsg_can_pullup(priv))
786 usbhs_sys_function_pullup(priv, 1);
787 else
788 usbhs_sys_function_pullup(priv, 0);
789}
790
791/*
792 * usb module start/end
793 */
794static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
795{
796 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
797 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
798 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
799 struct device *dev = usbhs_priv_to_dev(priv);
800 unsigned long flags;
801 int ret = 0;
802
803 /******************** spin lock ********************/
804 usbhs_lock(priv, flags);
805
806 usbhsg_status_set(gpriv, status);
807 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
808 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
809 ret = -1; /* not ready */
810
811 usbhs_unlock(priv, flags);
812 /******************** spin unlock ********************/
813
814 if (ret < 0)
815 return 0; /* not ready is not error */
816
817 /*
818 * enable interrupt and systems if ready
819 */
820 dev_dbg(dev, "start gadget\n");
821
822 /*
823 * pipe initialize and enable DCP
824 */
825 usbhs_fifo_init(priv);
826 usbhs_pipe_init(priv,
827 usbhsg_dma_map_ctrl);
828
829 /* dcp init instead of usbhsg_ep_enable() */
830 dcp->pipe = usbhs_dcp_malloc(priv);
831 dcp->pipe->mod_private = dcp;
832 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
833
834 /*
835 * system config enble
836 * - HI speed
837 * - function
838 * - usb module
839 */
840 usbhs_sys_function_ctrl(priv, 1);
841 usbhsg_update_pullup(priv);
842
843 /*
844 * enable irq callback
845 */
846 mod->irq_dev_state = usbhsg_irq_dev_state;
847 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
848 usbhs_irq_callback_update(priv, mod);
849
850 return 0;
851}
852
853static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
854{
855 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
856 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
857 struct usbhsg_uep *uep;
858 struct device *dev = usbhs_priv_to_dev(priv);
859 unsigned long flags;
860 int ret = 0, i;
861
862 /******************** spin lock ********************/
863 usbhs_lock(priv, flags);
864
865 usbhsg_status_clr(gpriv, status);
866 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
867 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
868 ret = -1; /* already done */
869
870 usbhs_unlock(priv, flags);
871 /******************** spin unlock ********************/
872
873 if (ret < 0)
874 return 0; /* already done is not error */
875
876 /*
877 * disable interrupt and systems if 1st try
878 */
879 usbhs_fifo_quit(priv);
880
881 /* disable all irq */
882 mod->irq_dev_state = NULL;
883 mod->irq_ctrl_stage = NULL;
884 usbhs_irq_callback_update(priv, mod);
885
886 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
887
888 /* disable sys */
889 usbhs_sys_set_test_mode(priv, 0);
890 usbhs_sys_function_ctrl(priv, 0);
891
892 /* disable all eps */
893 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
894 usbhsg_ep_disable(&uep->ep);
895
896 dev_dbg(dev, "stop gadget\n");
897
898 return 0;
899}
900
901/*
902 * VBUS provided by the PHY
903 */
904static int usbhsm_phy_get_vbus(struct platform_device *pdev)
905{
906 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
907 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
908
909 return gpriv->vbus_active;
910}
911
912static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
913{
914 struct usbhs_mod_info *info = &priv->mod_info;
915
916 info->irq_vbus = NULL;
917 priv->pfunc.get_vbus = usbhsm_phy_get_vbus;
918
919 usbhs_irq_callback_update(priv, NULL);
920}
921
922/*
923 *
924 * linux usb function
925 *
926 */
927static int usbhsg_gadget_start(struct usb_gadget *gadget,
928 struct usb_gadget_driver *driver)
929{
930 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
931 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
932 struct device *dev = usbhs_priv_to_dev(priv);
933 int ret;
934
935 if (!driver ||
936 !driver->setup ||
937 driver->max_speed < USB_SPEED_FULL)
938 return -EINVAL;
939
940 /* connect to bus through transceiver */
941 if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
942 ret = otg_set_peripheral(gpriv->transceiver->otg,
943 &gpriv->gadget);
944 if (ret) {
945 dev_err(dev, "%s: can't bind to transceiver\n",
946 gpriv->gadget.name);
947 return ret;
948 }
949
950 /* get vbus using phy versions */
951 usbhs_mod_phy_mode(priv);
952 }
953
954 /* first hook up the driver ... */
955 gpriv->driver = driver;
956
957 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
958}
959
960static int usbhsg_gadget_stop(struct usb_gadget *gadget)
961{
962 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
963 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
964
965 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
966
967 if (!IS_ERR_OR_NULL(gpriv->transceiver))
968 otg_set_peripheral(gpriv->transceiver->otg, NULL);
969
970 gpriv->driver = NULL;
971
972 return 0;
973}
974
975/*
976 * usb gadget ops
977 */
978static int usbhsg_get_frame(struct usb_gadget *gadget)
979{
980 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
981 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
982
983 return usbhs_frame_get_num(priv);
984}
985
986static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
987{
988 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
989 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
990 unsigned long flags;
991
992 usbhs_lock(priv, flags);
993 if (is_on)
994 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
995 else
996 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
997 usbhsg_update_pullup(priv);
998 usbhs_unlock(priv, flags);
999
1000 return 0;
1001}
1002
1003static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1004{
1005 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1006
1007 if (is_self)
1008 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1009 else
1010 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1011
1012 gadget->is_selfpowered = (is_self != 0);
1013
1014 return 0;
1015}
1016
1017static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1018{
1019 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1020 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1021 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1022
1023 gpriv->vbus_active = !!is_active;
1024
1025 renesas_usbhs_call_notify_hotplug(pdev);
1026
1027 return 0;
1028}
1029
1030static const struct usb_gadget_ops usbhsg_gadget_ops = {
1031 .get_frame = usbhsg_get_frame,
1032 .set_selfpowered = usbhsg_set_selfpowered,
1033 .udc_start = usbhsg_gadget_start,
1034 .udc_stop = usbhsg_gadget_stop,
1035 .pullup = usbhsg_pullup,
1036 .vbus_session = usbhsg_vbus_session,
1037};
1038
1039static int usbhsg_start(struct usbhs_priv *priv)
1040{
1041 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1042}
1043
1044static int usbhsg_stop(struct usbhs_priv *priv)
1045{
1046 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1047
1048 /* cable disconnect */
1049 if (gpriv->driver &&
1050 gpriv->driver->disconnect)
1051 gpriv->driver->disconnect(&gpriv->gadget);
1052
1053 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1054}
1055
1056int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1057{
1058 struct usbhsg_gpriv *gpriv;
1059 struct usbhsg_uep *uep;
1060 struct device *dev = usbhs_priv_to_dev(priv);
1061 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1062 usbhs_get_dparam(priv, pipe_configs);
1063 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1064 int i;
1065 int ret;
1066
1067 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1068 if (!gpriv)
1069 return -ENOMEM;
1070
1071 uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1072 if (!uep) {
1073 ret = -ENOMEM;
1074 goto usbhs_mod_gadget_probe_err_gpriv;
1075 }
1076
1077 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1078 dev_info(dev, "%stransceiver found\n",
1079 !IS_ERR(gpriv->transceiver) ? "" : "no ");
1080
1081 /*
1082 * CAUTION
1083 *
1084 * There is no guarantee that it is possible to access usb module here.
1085 * Don't accesses to it.
1086 * The accesse will be enable after "usbhsg_start"
1087 */
1088
1089 /*
1090 * register itself
1091 */
1092 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1093
1094 /* init gpriv */
1095 gpriv->mod.name = "gadget";
1096 gpriv->mod.start = usbhsg_start;
1097 gpriv->mod.stop = usbhsg_stop;
1098 gpriv->uep = uep;
1099 gpriv->uep_size = pipe_size;
1100 usbhsg_status_init(gpriv);
1101
1102 /*
1103 * init gadget
1104 */
1105 gpriv->gadget.dev.parent = dev;
1106 gpriv->gadget.name = "renesas_usbhs_udc";
1107 gpriv->gadget.ops = &usbhsg_gadget_ops;
1108 gpriv->gadget.max_speed = USB_SPEED_HIGH;
1109 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1110 has_usb_dmac);
1111
1112 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1113
1114 /*
1115 * init usb_ep
1116 */
1117 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1118 uep->gpriv = gpriv;
1119 uep->pipe = NULL;
1120 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1121
1122 uep->ep.name = uep->ep_name;
1123 uep->ep.ops = &usbhsg_ep_ops;
1124 INIT_LIST_HEAD(&uep->ep.ep_list);
1125 spin_lock_init(&uep->lock);
1126
1127 /* init DCP */
1128 if (usbhsg_is_dcp(uep)) {
1129 gpriv->gadget.ep0 = &uep->ep;
1130 usb_ep_set_maxpacket_limit(&uep->ep, 64);
1131 uep->ep.caps.type_control = true;
1132 } else {
1133 /* init normal pipe */
1134 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1135 uep->ep.caps.type_iso = true;
1136 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1137 uep->ep.caps.type_bulk = true;
1138 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1139 uep->ep.caps.type_int = true;
1140 usb_ep_set_maxpacket_limit(&uep->ep,
1141 pipe_configs[i].bufsize);
1142 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1143 }
1144 uep->ep.caps.dir_in = true;
1145 uep->ep.caps.dir_out = true;
1146 }
1147
1148 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1149 if (ret)
1150 goto err_add_udc;
1151
1152
1153 dev_info(dev, "gadget probed\n");
1154
1155 return 0;
1156
1157err_add_udc:
1158 kfree(gpriv->uep);
1159
1160usbhs_mod_gadget_probe_err_gpriv:
1161 kfree(gpriv);
1162
1163 return ret;
1164}
1165
1166void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1167{
1168 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1169
1170 usb_del_gadget_udc(&gpriv->gadget);
1171
1172 kfree(gpriv->uep);
1173 kfree(gpriv);
1174}