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