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Linux 4.19.133
[linux/fpc-iii.git] / drivers / usb / renesas_usbhs / mod_gadget.c
blobf36248e9387db1972a66f0d49e91519bc7869cb4
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 */
21 struct usbhsg_request {
22 struct usb_request req;
23 struct usbhs_pkt pkt;
24 };
25
26 #define EP_NAME_SIZE 8
27 struct usbhsg_gpriv;
28 struct 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
38 struct 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
57 struct 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 */
117 static 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
135 static 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
148 static 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
163 static 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 */
186 static 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 */
216 static 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
229 static 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
249 static 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 */
259 static 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
277 static 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
290 static 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 */
300 static 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
310 static 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
347 static 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
362 static 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
374 static 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
390 static 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 */
400 static 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 */
454 static 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 int state = usbhs_status_get_device_state(irq_state);
460
461 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
462
463 dev_dbg(dev, "state = %x : speed : %d\n", state, gpriv->gadget.speed);
464
465 if (gpriv->gadget.speed != USB_SPEED_UNKNOWN &&
466 (state & SUSPENDED_STATE)) {
467 if (gpriv->driver && gpriv->driver->suspend)
468 gpriv->driver->suspend(&gpriv->gadget);
469 usb_gadget_set_state(&gpriv->gadget, USB_STATE_SUSPENDED);
470 }
471
472 return 0;
473 }
474
475 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
476 struct usbhs_irq_state *irq_state)
477 {
478 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
479 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
480 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
481 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
482 struct usb_ctrlrequest ctrl;
483 struct usbhsg_recip_handle *recip_handler = NULL;
484 int stage = usbhs_status_get_ctrl_stage(irq_state);
485 int ret = 0;
486
487 dev_dbg(dev, "stage = %d\n", stage);
488
489 /*
490 * see Manual
491 *
492 * "Operation"
493 * - "Interrupt Function"
494 * - "Control Transfer Stage Transition Interrupt"
495 * - Fig. "Control Transfer Stage Transitions"
496 */
497
498 switch (stage) {
499 case READ_DATA_STAGE:
500 pipe->handler = &usbhs_fifo_pio_push_handler;
501 break;
502 case WRITE_DATA_STAGE:
503 pipe->handler = &usbhs_fifo_pio_pop_handler;
504 break;
505 case NODATA_STATUS_STAGE:
506 pipe->handler = &usbhs_ctrl_stage_end_handler;
507 break;
508 case READ_STATUS_STAGE:
509 case WRITE_STATUS_STAGE:
510 usbhs_dcp_control_transfer_done(pipe);
511 /* fall through */
512 default:
513 return ret;
514 }
515
516 /*
517 * get usb request
518 */
519 usbhs_usbreq_get_val(priv, &ctrl);
520
521 switch (ctrl.bRequestType & USB_TYPE_MASK) {
522 case USB_TYPE_STANDARD:
523 switch (ctrl.bRequest) {
524 case USB_REQ_CLEAR_FEATURE:
525 recip_handler = &req_clear_feature;
526 break;
527 case USB_REQ_SET_FEATURE:
528 recip_handler = &req_set_feature;
529 break;
530 case USB_REQ_GET_STATUS:
531 recip_handler = &req_get_status;
532 break;
533 }
534 }
535
536 /*
537 * setup stage / run recip
538 */
539 if (recip_handler)
540 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
541 else
542 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
543
544 if (ret < 0)
545 usbhs_pipe_stall(pipe);
546
547 return ret;
548 }
549
550 /*
551 *
552 * usb_dcp_ops
553 *
554 */
555 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
556 {
557 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
558 struct usbhs_pkt *pkt;
559
560 while (1) {
561 pkt = usbhs_pkt_pop(pipe, NULL);
562 if (!pkt)
563 break;
564
565 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
566 }
567
568 usbhs_pipe_disable(pipe);
569
570 return 0;
571 }
572
573 /*
574 *
575 * usb_ep_ops
576 *
577 */
578 static int usbhsg_ep_enable(struct usb_ep *ep,
579 const struct usb_endpoint_descriptor *desc)
580 {
581 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
582 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
583 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
584 struct usbhs_pipe *pipe;
585 int ret = -EIO;
586 unsigned long flags;
587
588 usbhs_lock(priv, flags);
589
590 /*
591 * if it already have pipe,
592 * nothing to do
593 */
594 if (uep->pipe) {
595 usbhs_pipe_clear(uep->pipe);
596 usbhs_pipe_sequence_data0(uep->pipe);
597 ret = 0;
598 goto usbhsg_ep_enable_end;
599 }
600
601 pipe = usbhs_pipe_malloc(priv,
602 usb_endpoint_type(desc),
603 usb_endpoint_dir_in(desc));
604 if (pipe) {
605 uep->pipe = pipe;
606 pipe->mod_private = uep;
607
608 /* set epnum / maxp */
609 usbhs_pipe_config_update(pipe, 0,
610 usb_endpoint_num(desc),
611 usb_endpoint_maxp(desc));
612
613 /*
614 * usbhs_fifo_dma_push/pop_handler try to
615 * use dmaengine if possible.
616 * It will use pio handler if impossible.
617 */
618 if (usb_endpoint_dir_in(desc)) {
619 pipe->handler = &usbhs_fifo_dma_push_handler;
620 } else {
621 pipe->handler = &usbhs_fifo_dma_pop_handler;
622 usbhs_xxxsts_clear(priv, BRDYSTS,
623 usbhs_pipe_number(pipe));
624 }
625
626 ret = 0;
627 }
628
629 usbhsg_ep_enable_end:
630 usbhs_unlock(priv, flags);
631
632 return ret;
633 }
634
635 static int usbhsg_ep_disable(struct usb_ep *ep)
636 {
637 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
638 struct usbhs_pipe *pipe;
639 unsigned long flags;
640
641 spin_lock_irqsave(&uep->lock, flags);
642 pipe = usbhsg_uep_to_pipe(uep);
643 if (!pipe)
644 goto out;
645
646 usbhsg_pipe_disable(uep);
647 usbhs_pipe_free(pipe);
648
649 uep->pipe->mod_private = NULL;
650 uep->pipe = NULL;
651
652 out:
653 spin_unlock_irqrestore(&uep->lock, flags);
654
655 return 0;
656 }
657
658 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
659 gfp_t gfp_flags)
660 {
661 struct usbhsg_request *ureq;
662
663 ureq = kzalloc(sizeof *ureq, gfp_flags);
664 if (!ureq)
665 return NULL;
666
667 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
668
669 return &ureq->req;
670 }
671
672 static void usbhsg_ep_free_request(struct usb_ep *ep,
673 struct usb_request *req)
674 {
675 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
676
677 WARN_ON(!list_empty(&ureq->pkt.node));
678 kfree(ureq);
679 }
680
681 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
682 gfp_t gfp_flags)
683 {
684 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
685 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
686 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
687 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
688
689 /* param check */
690 if (usbhsg_is_not_connected(gpriv) ||
691 unlikely(!gpriv->driver) ||
692 unlikely(!pipe))
693 return -ESHUTDOWN;
694
695 usbhsg_queue_push(uep, ureq);
696
697 return 0;
698 }
699
700 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
701 {
702 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
703 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
704 struct usbhs_pipe *pipe;
705 unsigned long flags;
706
707 spin_lock_irqsave(&uep->lock, flags);
708 pipe = usbhsg_uep_to_pipe(uep);
709 if (pipe)
710 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
711
712 /*
713 * To dequeue a request, this driver should call the usbhsg_queue_pop()
714 * even if the pipe is NULL.
715 */
716 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
717 spin_unlock_irqrestore(&uep->lock, flags);
718
719 return 0;
720 }
721
722 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
723 {
724 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
725 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
726 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
727 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
728 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
729 unsigned long flags;
730 int ret = 0;
731
732 dev_dbg(dev, "set halt %d (pipe %d)\n",
733 halt, usbhs_pipe_number(pipe));
734
735 /******************** spin lock ********************/
736 usbhs_lock(priv, flags);
737
738 /*
739 * According to usb_ep_set_halt()'s description, this function should
740 * return -EAGAIN if the IN endpoint has any queue or data. Note
741 * that the usbhs_pipe_is_dir_in() returns false if the pipe is an
742 * IN endpoint in the gadget mode.
743 */
744 if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) ||
745 usbhs_pipe_contains_transmittable_data(pipe))) {
746 ret = -EAGAIN;
747 goto out;
748 }
749
750 if (halt)
751 usbhs_pipe_stall(pipe);
752 else
753 usbhs_pipe_disable(pipe);
754
755 if (halt && wedge)
756 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
757 else
758 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
759
760 out:
761 usbhs_unlock(priv, flags);
762 /******************** spin unlock ******************/
763
764 return ret;
765 }
766
767 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
768 {
769 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
770 }
771
772 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
773 {
774 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
775 }
776
777 static const struct usb_ep_ops usbhsg_ep_ops = {
778 .enable = usbhsg_ep_enable,
779 .disable = usbhsg_ep_disable,
780
781 .alloc_request = usbhsg_ep_alloc_request,
782 .free_request = usbhsg_ep_free_request,
783
784 .queue = usbhsg_ep_queue,
785 .dequeue = usbhsg_ep_dequeue,
786
787 .set_halt = usbhsg_ep_set_halt,
788 .set_wedge = usbhsg_ep_set_wedge,
789 };
790
791 /*
792 * pullup control
793 */
794 static int usbhsg_can_pullup(struct usbhs_priv *priv)
795 {
796 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
797
798 return gpriv->driver &&
799 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
800 }
801
802 static void usbhsg_update_pullup(struct usbhs_priv *priv)
803 {
804 if (usbhsg_can_pullup(priv))
805 usbhs_sys_function_pullup(priv, 1);
806 else
807 usbhs_sys_function_pullup(priv, 0);
808 }
809
810 /*
811 * usb module start/end
812 */
813 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
814 {
815 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
816 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
817 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
818 struct device *dev = usbhs_priv_to_dev(priv);
819 unsigned long flags;
820 int ret = 0;
821
822 /******************** spin lock ********************/
823 usbhs_lock(priv, flags);
824
825 usbhsg_status_set(gpriv, status);
826 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
827 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
828 ret = -1; /* not ready */
829
830 usbhs_unlock(priv, flags);
831 /******************** spin unlock ********************/
832
833 if (ret < 0)
834 return 0; /* not ready is not error */
835
836 /*
837 * enable interrupt and systems if ready
838 */
839 dev_dbg(dev, "start gadget\n");
840
841 /*
842 * pipe initialize and enable DCP
843 */
844 usbhs_fifo_init(priv);
845 usbhs_pipe_init(priv,
846 usbhsg_dma_map_ctrl);
847
848 /* dcp init instead of usbhsg_ep_enable() */
849 dcp->pipe = usbhs_dcp_malloc(priv);
850 dcp->pipe->mod_private = dcp;
851 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
852
853 /*
854 * system config enble
855 * - HI speed
856 * - function
857 * - usb module
858 */
859 usbhs_sys_function_ctrl(priv, 1);
860 usbhsg_update_pullup(priv);
861
862 /*
863 * enable irq callback
864 */
865 mod->irq_dev_state = usbhsg_irq_dev_state;
866 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
867 usbhs_irq_callback_update(priv, mod);
868
869 return 0;
870 }
871
872 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
873 {
874 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
875 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
876 struct usbhsg_uep *uep;
877 struct device *dev = usbhs_priv_to_dev(priv);
878 unsigned long flags;
879 int ret = 0, i;
880
881 /******************** spin lock ********************/
882 usbhs_lock(priv, flags);
883
884 usbhsg_status_clr(gpriv, status);
885 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
886 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
887 ret = -1; /* already done */
888
889 usbhs_unlock(priv, flags);
890 /******************** spin unlock ********************/
891
892 if (ret < 0)
893 return 0; /* already done is not error */
894
895 /*
896 * disable interrupt and systems if 1st try
897 */
898 usbhs_fifo_quit(priv);
899
900 /* disable all irq */
901 mod->irq_dev_state = NULL;
902 mod->irq_ctrl_stage = NULL;
903 usbhs_irq_callback_update(priv, mod);
904
905 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
906
907 /* disable sys */
908 usbhs_sys_set_test_mode(priv, 0);
909 usbhs_sys_function_ctrl(priv, 0);
910
911 /* disable all eps */
912 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
913 usbhsg_ep_disable(&uep->ep);
914
915 dev_dbg(dev, "stop gadget\n");
916
917 return 0;
918 }
919
920 /*
921 * VBUS provided by the PHY
922 */
923 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
924 {
925 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
926 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
927
928 return gpriv->vbus_active;
929 }
930
931 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
932 {
933 struct usbhs_mod_info *info = &priv->mod_info;
934
935 info->irq_vbus = NULL;
936 priv->pfunc.get_vbus = usbhsm_phy_get_vbus;
937
938 usbhs_irq_callback_update(priv, NULL);
939 }
940
941 /*
942 *
943 * linux usb function
944 *
945 */
946 static int usbhsg_gadget_start(struct usb_gadget *gadget,
947 struct usb_gadget_driver *driver)
948 {
949 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
950 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
951 struct device *dev = usbhs_priv_to_dev(priv);
952 int ret;
953
954 if (!driver ||
955 !driver->setup ||
956 driver->max_speed < USB_SPEED_FULL)
957 return -EINVAL;
958
959 /* connect to bus through transceiver */
960 if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
961 ret = otg_set_peripheral(gpriv->transceiver->otg,
962 &gpriv->gadget);
963 if (ret) {
964 dev_err(dev, "%s: can't bind to transceiver\n",
965 gpriv->gadget.name);
966 return ret;
967 }
968
969 /* get vbus using phy versions */
970 usbhs_mod_phy_mode(priv);
971 }
972
973 /* first hook up the driver ... */
974 gpriv->driver = driver;
975
976 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
977 }
978
979 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
980 {
981 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
982 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
983
984 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
985
986 if (!IS_ERR_OR_NULL(gpriv->transceiver))
987 otg_set_peripheral(gpriv->transceiver->otg, NULL);
988
989 gpriv->driver = NULL;
990
991 return 0;
992 }
993
994 /*
995 * usb gadget ops
996 */
997 static int usbhsg_get_frame(struct usb_gadget *gadget)
998 {
999 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1000 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1001
1002 return usbhs_frame_get_num(priv);
1003 }
1004
1005 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
1006 {
1007 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1008 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1009 unsigned long flags;
1010
1011 usbhs_lock(priv, flags);
1012 if (is_on)
1013 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1014 else
1015 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1016 usbhsg_update_pullup(priv);
1017 usbhs_unlock(priv, flags);
1018
1019 return 0;
1020 }
1021
1022 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1023 {
1024 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1025
1026 if (is_self)
1027 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1028 else
1029 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1030
1031 gadget->is_selfpowered = (is_self != 0);
1032
1033 return 0;
1034 }
1035
1036 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1037 {
1038 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1039 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1040 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1041
1042 gpriv->vbus_active = !!is_active;
1043
1044 renesas_usbhs_call_notify_hotplug(pdev);
1045
1046 return 0;
1047 }
1048
1049 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1050 .get_frame = usbhsg_get_frame,
1051 .set_selfpowered = usbhsg_set_selfpowered,
1052 .udc_start = usbhsg_gadget_start,
1053 .udc_stop = usbhsg_gadget_stop,
1054 .pullup = usbhsg_pullup,
1055 .vbus_session = usbhsg_vbus_session,
1056 };
1057
1058 static int usbhsg_start(struct usbhs_priv *priv)
1059 {
1060 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1061 }
1062
1063 static int usbhsg_stop(struct usbhs_priv *priv)
1064 {
1065 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1066
1067 /* cable disconnect */
1068 if (gpriv->driver &&
1069 gpriv->driver->disconnect)
1070 gpriv->driver->disconnect(&gpriv->gadget);
1071
1072 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1073 }
1074
1075 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1076 {
1077 struct usbhsg_gpriv *gpriv;
1078 struct usbhsg_uep *uep;
1079 struct device *dev = usbhs_priv_to_dev(priv);
1080 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1081 usbhs_get_dparam(priv, pipe_configs);
1082 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1083 int i;
1084 int ret;
1085
1086 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1087 if (!gpriv)
1088 return -ENOMEM;
1089
1090 uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL);
1091 if (!uep) {
1092 ret = -ENOMEM;
1093 goto usbhs_mod_gadget_probe_err_gpriv;
1094 }
1095
1096 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1097 dev_info(dev, "%stransceiver found\n",
1098 !IS_ERR(gpriv->transceiver) ? "" : "no ");
1099
1100 /*
1101 * CAUTION
1102 *
1103 * There is no guarantee that it is possible to access usb module here.
1104 * Don't accesses to it.
1105 * The accesse will be enable after "usbhsg_start"
1106 */
1107
1108 /*
1109 * register itself
1110 */
1111 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1112
1113 /* init gpriv */
1114 gpriv->mod.name = "gadget";
1115 gpriv->mod.start = usbhsg_start;
1116 gpriv->mod.stop = usbhsg_stop;
1117 gpriv->uep = uep;
1118 gpriv->uep_size = pipe_size;
1119 usbhsg_status_init(gpriv);
1120
1121 /*
1122 * init gadget
1123 */
1124 gpriv->gadget.dev.parent = dev;
1125 gpriv->gadget.name = "renesas_usbhs_udc";
1126 gpriv->gadget.ops = &usbhsg_gadget_ops;
1127 gpriv->gadget.max_speed = USB_SPEED_HIGH;
1128 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1129 has_usb_dmac);
1130
1131 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1132
1133 /*
1134 * init usb_ep
1135 */
1136 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1137 uep->gpriv = gpriv;
1138 uep->pipe = NULL;
1139 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1140
1141 uep->ep.name = uep->ep_name;
1142 uep->ep.ops = &usbhsg_ep_ops;
1143 INIT_LIST_HEAD(&uep->ep.ep_list);
1144 spin_lock_init(&uep->lock);
1145
1146 /* init DCP */
1147 if (usbhsg_is_dcp(uep)) {
1148 gpriv->gadget.ep0 = &uep->ep;
1149 usb_ep_set_maxpacket_limit(&uep->ep, 64);
1150 uep->ep.caps.type_control = true;
1151 } else {
1152 /* init normal pipe */
1153 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1154 uep->ep.caps.type_iso = true;
1155 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1156 uep->ep.caps.type_bulk = true;
1157 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1158 uep->ep.caps.type_int = true;
1159 usb_ep_set_maxpacket_limit(&uep->ep,
1160 pipe_configs[i].bufsize);
1161 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1162 }
1163 uep->ep.caps.dir_in = true;
1164 uep->ep.caps.dir_out = true;
1165 }
1166
1167 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1168 if (ret)
1169 goto err_add_udc;
1170
1171
1172 dev_info(dev, "gadget probed\n");
1173
1174 return 0;
1175
1176 err_add_udc:
1177 kfree(gpriv->uep);
1178
1179 usbhs_mod_gadget_probe_err_gpriv:
1180 kfree(gpriv);
1181
1182 return ret;
1183 }
1184
1185 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1186 {
1187 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1188
1189 usb_del_gadget_udc(&gpriv->gadget);
1190
1191 kfree(gpriv->uep);
1192 kfree(gpriv);
1193 }
Linux with added FPC-III support