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2f98382d KM |
1 | /* |
2 | * Renesas USB driver | |
3 | * | |
4 | * Copyright (C) 2011 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
15 | * | |
16 | */ | |
17 | #include <linux/io.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/usb/ch9.h> | |
21 | #include <linux/usb/gadget.h> | |
22 | #include "common.h" | |
23 | ||
24 | /* | |
25 | * struct | |
26 | */ | |
27 | struct usbhsg_request { | |
28 | struct usb_request req; | |
4bd04811 | 29 | struct usbhs_pkt pkt; |
2f98382d KM |
30 | }; |
31 | ||
32 | #define EP_NAME_SIZE 8 | |
33 | struct usbhsg_gpriv; | |
2f98382d KM |
34 | struct usbhsg_uep { |
35 | struct usb_ep ep; | |
36 | struct usbhs_pipe *pipe; | |
2f98382d KM |
37 | |
38 | char ep_name[EP_NAME_SIZE]; | |
39 | ||
40 | struct usbhsg_gpriv *gpriv; | |
dad67397 | 41 | struct usbhs_pkt_handle *handler; |
2f98382d KM |
42 | }; |
43 | ||
44 | struct usbhsg_gpriv { | |
45 | struct usb_gadget gadget; | |
46 | struct usbhs_mod mod; | |
47 | ||
48 | struct usbhsg_uep *uep; | |
49 | int uep_size; | |
50 | ||
51 | struct usb_gadget_driver *driver; | |
52 | ||
53 | u32 status; | |
54 | #define USBHSG_STATUS_STARTED (1 << 0) | |
55 | #define USBHSG_STATUS_REGISTERD (1 << 1) | |
56 | #define USBHSG_STATUS_WEDGE (1 << 2) | |
57 | }; | |
58 | ||
2f98382d KM |
59 | struct usbhsg_recip_handle { |
60 | char *name; | |
61 | int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
62 | struct usb_ctrlrequest *ctrl); | |
63 | int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
64 | struct usb_ctrlrequest *ctrl); | |
65 | int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
66 | struct usb_ctrlrequest *ctrl); | |
67 | }; | |
68 | ||
69 | /* | |
70 | * macro | |
71 | */ | |
72 | #define usbhsg_priv_to_gpriv(priv) \ | |
73 | container_of( \ | |
74 | usbhs_mod_get(priv, USBHS_GADGET), \ | |
75 | struct usbhsg_gpriv, mod) | |
76 | ||
77 | #define __usbhsg_for_each_uep(start, pos, g, i) \ | |
78 | for (i = start, pos = (g)->uep; \ | |
79 | i < (g)->uep_size; \ | |
80 | i++, pos = (g)->uep + i) | |
81 | ||
82 | #define usbhsg_for_each_uep(pos, gpriv, i) \ | |
83 | __usbhsg_for_each_uep(1, pos, gpriv, i) | |
84 | ||
85 | #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ | |
86 | __usbhsg_for_each_uep(0, pos, gpriv, i) | |
87 | ||
88 | #define usbhsg_gadget_to_gpriv(g)\ | |
89 | container_of(g, struct usbhsg_gpriv, gadget) | |
90 | ||
91 | #define usbhsg_req_to_ureq(r)\ | |
92 | container_of(r, struct usbhsg_request, req) | |
93 | ||
94 | #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) | |
95 | #define usbhsg_gpriv_to_lock(gp) usbhs_priv_to_lock((gp)->mod.priv) | |
96 | #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) | |
97 | #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) | |
98 | #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) | |
99 | #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) | |
100 | #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) | |
101 | #define usbhsg_uep_to_pipe(u) ((u)->pipe) | |
102 | #define usbhsg_pipe_to_uep(p) ((p)->mod_private) | |
103 | #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) | |
104 | ||
4bd04811 KM |
105 | #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) |
106 | #define usbhsg_pkt_to_ureq(i) \ | |
107 | container_of(i, struct usbhsg_request, pkt) | |
108 | ||
2f98382d KM |
109 | #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) |
110 | ||
111 | /* status */ | |
112 | #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) | |
113 | #define usbhsg_status_set(gp, b) (gp->status |= b) | |
114 | #define usbhsg_status_clr(gp, b) (gp->status &= ~b) | |
115 | #define usbhsg_status_has(gp, b) (gp->status & b) | |
116 | ||
cb96632c KM |
117 | /* |
118 | * usbhsg_trylock | |
119 | * | |
120 | * This driver don't use spin_try_lock | |
121 | * to avoid warning of CONFIG_DEBUG_SPINLOCK | |
122 | */ | |
123 | static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv, | |
124 | unsigned long *flags) | |
125 | { | |
126 | spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv); | |
127 | ||
128 | /* check spin lock status | |
129 | * to avoid deadlock/nest */ | |
130 | if (spin_is_locked(lock)) | |
131 | return NULL; | |
132 | ||
133 | spin_lock_irqsave(lock, *flags); | |
134 | ||
135 | return lock; | |
136 | } | |
137 | ||
138 | static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags) | |
139 | { | |
140 | if (!lock) | |
141 | return; | |
142 | ||
143 | spin_unlock_irqrestore(lock, *flags); | |
144 | } | |
145 | ||
2f98382d KM |
146 | /* |
147 | * list push/pop | |
148 | */ | |
149 | static void usbhsg_queue_push(struct usbhsg_uep *uep, | |
150 | struct usbhsg_request *ureq) | |
151 | { | |
152 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
153 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
154 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
6acb95d4 | 155 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); |
659d4954 | 156 | struct usb_request *req = &ureq->req; |
2f98382d KM |
157 | |
158 | /* | |
159 | ********* assume under spin lock ********* | |
160 | */ | |
dad67397 KM |
161 | usbhs_pkt_push(pipe, pkt, uep->handler, |
162 | req->buf, req->length, req->zero); | |
659d4954 KM |
163 | req->actual = 0; |
164 | req->status = -EINPROGRESS; | |
2f98382d KM |
165 | |
166 | dev_dbg(dev, "pipe %d : queue push (%d)\n", | |
167 | usbhs_pipe_number(pipe), | |
659d4954 | 168 | req->length); |
2f98382d KM |
169 | } |
170 | ||
dad67397 | 171 | static int usbhsg_queue_start(struct usbhsg_uep *uep) |
2f98382d KM |
172 | { |
173 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
dad67397 KM |
174 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); |
175 | struct usbhs_pkt *pkt; | |
cb96632c | 176 | spinlock_t *lock; |
2f98382d | 177 | unsigned long flags; |
2f98382d KM |
178 | int ret = 0; |
179 | ||
2f98382d KM |
180 | /* |
181 | * CAUTION [*queue handler*] | |
182 | * | |
183 | * This function will be called for start/restart queue operation. | |
184 | * OTOH the most much worry for USB driver is spinlock nest. | |
185 | * Specially it are | |
186 | * - usb_ep_ops :: queue | |
187 | * - usb_request :: complete | |
188 | * | |
189 | * But the caller of this function need not care about spinlock. | |
cb96632c | 190 | * This function is using usbhsg_trylock for it. |
2f98382d KM |
191 | * if "is_locked" is 1, this mean this function lock it. |
192 | * but if it is 0, this mean it is already under spin lock. | |
193 | * see also | |
194 | * CAUTION [*endpoint queue*] | |
195 | * CAUTION [*request complete*] | |
196 | */ | |
197 | ||
198 | /****************** spin try lock *******************/ | |
cb96632c KM |
199 | lock = usbhsg_trylock(gpriv, &flags); |
200 | ||
dad67397 KM |
201 | pkt = usbhs_pkt_get(pipe); |
202 | if (pkt) | |
203 | ret = usbhs_pkt_start(pkt); | |
204 | ||
cb96632c | 205 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
206 | /******************** spin unlock ******************/ |
207 | ||
208 | return ret; | |
209 | } | |
210 | ||
211 | static void usbhsg_queue_pop(struct usbhsg_uep *uep, | |
212 | struct usbhsg_request *ureq, | |
213 | int status) | |
214 | { | |
215 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
216 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
217 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
6acb95d4 | 218 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); |
2f98382d KM |
219 | |
220 | /* | |
221 | ********* assume under spin lock ********* | |
222 | */ | |
223 | ||
224 | /* | |
225 | * CAUTION [*request complete*] | |
226 | * | |
227 | * There is a possibility not to be called in correct order | |
228 | * if "complete" is called without spinlock. | |
229 | * | |
230 | * So, this function assume it is under spinlock, | |
231 | * and call usb_request :: complete. | |
232 | * | |
233 | * But this "complete" will push next usb_request. | |
234 | * It mean "usb_ep_ops :: queue" which is using spinlock is called | |
235 | * under spinlock. | |
236 | * | |
cb96632c | 237 | * To avoid dead-lock, this driver is using usbhsg_trylock. |
2f98382d KM |
238 | * CAUTION [*endpoint queue*] |
239 | * CAUTION [*queue handler*] | |
240 | */ | |
241 | ||
242 | dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); | |
243 | ||
6acb95d4 | 244 | usbhs_pkt_pop(pkt); |
2f98382d KM |
245 | |
246 | ureq->req.status = status; | |
247 | ureq->req.complete(&uep->ep, &ureq->req); | |
248 | ||
249 | /* more request ? */ | |
250 | if (0 == status) | |
dad67397 | 251 | usbhsg_queue_start(uep); |
2f98382d KM |
252 | } |
253 | ||
dad67397 | 254 | static void usbhsg_queue_done(struct usbhs_pkt *pkt) |
2f98382d | 255 | { |
4bd04811 KM |
256 | struct usbhs_pipe *pipe = pkt->pipe; |
257 | struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); | |
258 | struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); | |
2f98382d | 259 | |
659d4954 | 260 | ureq->req.actual = pkt->actual; |
2f98382d | 261 | |
659d4954 | 262 | usbhsg_queue_pop(uep, ureq, 0); |
4bd04811 KM |
263 | } |
264 | ||
2f98382d KM |
265 | /* |
266 | * USB_TYPE_STANDARD / clear feature functions | |
267 | */ | |
268 | static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, | |
269 | struct usbhsg_uep *uep, | |
270 | struct usb_ctrlrequest *ctrl) | |
271 | { | |
272 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
273 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
274 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); | |
275 | ||
276 | usbhs_dcp_control_transfer_done(pipe); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, | |
282 | struct usbhsg_uep *uep, | |
283 | struct usb_ctrlrequest *ctrl) | |
284 | { | |
285 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
286 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
287 | ||
288 | if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { | |
e8d548d5 | 289 | usbhs_pipe_disable(pipe); |
2f98382d | 290 | usbhs_pipe_clear_sequence(pipe); |
e8d548d5 | 291 | usbhs_pipe_enable(pipe); |
2f98382d KM |
292 | } |
293 | ||
294 | usbhsg_recip_handler_std_control_done(priv, uep, ctrl); | |
295 | ||
dad67397 | 296 | usbhsg_queue_start(uep); |
2f98382d KM |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
301 | struct usbhsg_recip_handle req_clear_feature = { | |
302 | .name = "clear feature", | |
303 | .device = usbhsg_recip_handler_std_control_done, | |
304 | .interface = usbhsg_recip_handler_std_control_done, | |
305 | .endpoint = usbhsg_recip_handler_std_clear_endpoint, | |
306 | }; | |
307 | ||
308 | /* | |
309 | * USB_TYPE handler | |
310 | */ | |
311 | static int usbhsg_recip_run_handle(struct usbhs_priv *priv, | |
312 | struct usbhsg_recip_handle *handler, | |
313 | struct usb_ctrlrequest *ctrl) | |
314 | { | |
315 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
316 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
317 | struct usbhsg_uep *uep; | |
318 | int recip = ctrl->bRequestType & USB_RECIP_MASK; | |
319 | int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
320 | int ret; | |
321 | int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
322 | struct usb_ctrlrequest *ctrl); | |
323 | char *msg; | |
324 | ||
325 | uep = usbhsg_gpriv_to_nth_uep(gpriv, nth); | |
9a28b7bd KM |
326 | if (!usbhsg_uep_to_pipe(uep)) { |
327 | dev_err(dev, "wrong recip request\n"); | |
328 | return -EINVAL; | |
329 | } | |
2f98382d KM |
330 | |
331 | switch (recip) { | |
332 | case USB_RECIP_DEVICE: | |
333 | msg = "DEVICE"; | |
334 | func = handler->device; | |
335 | break; | |
336 | case USB_RECIP_INTERFACE: | |
337 | msg = "INTERFACE"; | |
338 | func = handler->interface; | |
339 | break; | |
340 | case USB_RECIP_ENDPOINT: | |
341 | msg = "ENDPOINT"; | |
342 | func = handler->endpoint; | |
343 | break; | |
344 | default: | |
345 | dev_warn(dev, "unsupported RECIP(%d)\n", recip); | |
346 | func = NULL; | |
347 | ret = -EINVAL; | |
348 | } | |
349 | ||
350 | if (func) { | |
351 | dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg); | |
352 | ret = func(priv, uep, ctrl); | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
358 | /* | |
359 | * irq functions | |
360 | * | |
361 | * it will be called from usbhs_interrupt | |
362 | */ | |
363 | static int usbhsg_irq_dev_state(struct usbhs_priv *priv, | |
364 | struct usbhs_irq_state *irq_state) | |
365 | { | |
366 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
367 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
368 | ||
369 | gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state); | |
370 | ||
371 | dev_dbg(dev, "state = %x : speed : %d\n", | |
372 | usbhs_status_get_device_state(irq_state), | |
373 | gpriv->gadget.speed); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, | |
379 | struct usbhs_irq_state *irq_state) | |
380 | { | |
381 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
382 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
383 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); | |
384 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
385 | struct usb_ctrlrequest ctrl; | |
386 | struct usbhsg_recip_handle *recip_handler = NULL; | |
387 | int stage = usbhs_status_get_ctrl_stage(irq_state); | |
388 | int ret = 0; | |
389 | ||
390 | dev_dbg(dev, "stage = %d\n", stage); | |
391 | ||
392 | /* | |
393 | * see Manual | |
394 | * | |
395 | * "Operation" | |
396 | * - "Interrupt Function" | |
397 | * - "Control Transfer Stage Transition Interrupt" | |
398 | * - Fig. "Control Transfer Stage Transitions" | |
399 | */ | |
400 | ||
401 | switch (stage) { | |
402 | case READ_DATA_STAGE: | |
dad67397 | 403 | dcp->handler = &usbhs_fifo_push_handler; |
2f98382d KM |
404 | break; |
405 | case WRITE_DATA_STAGE: | |
dad67397 | 406 | dcp->handler = &usbhs_fifo_pop_handler; |
2f98382d KM |
407 | break; |
408 | case NODATA_STATUS_STAGE: | |
dad67397 | 409 | dcp->handler = &usbhs_ctrl_stage_end_handler; |
2f98382d KM |
410 | break; |
411 | default: | |
412 | return ret; | |
413 | } | |
414 | ||
415 | /* | |
416 | * get usb request | |
417 | */ | |
418 | usbhs_usbreq_get_val(priv, &ctrl); | |
419 | ||
420 | switch (ctrl.bRequestType & USB_TYPE_MASK) { | |
421 | case USB_TYPE_STANDARD: | |
422 | switch (ctrl.bRequest) { | |
423 | case USB_REQ_CLEAR_FEATURE: | |
424 | recip_handler = &req_clear_feature; | |
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | /* | |
430 | * setup stage / run recip | |
431 | */ | |
432 | if (recip_handler) | |
433 | ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); | |
434 | else | |
435 | ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); | |
436 | ||
437 | if (ret < 0) | |
e8d548d5 | 438 | usbhs_pipe_stall(pipe); |
2f98382d KM |
439 | |
440 | return ret; | |
441 | } | |
442 | ||
2f98382d KM |
443 | /* |
444 | * | |
445 | * usb_dcp_ops | |
446 | * | |
447 | */ | |
448 | static int usbhsg_dcp_enable(struct usbhsg_uep *uep) | |
449 | { | |
450 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
451 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
452 | struct usbhs_pipe *pipe; | |
453 | ||
454 | /* | |
455 | ********* assume under spin lock ********* | |
456 | */ | |
457 | ||
458 | pipe = usbhs_dcp_malloc(priv); | |
459 | if (!pipe) | |
460 | return -EIO; | |
461 | ||
462 | uep->pipe = pipe; | |
463 | uep->pipe->mod_private = uep; | |
2f98382d KM |
464 | |
465 | return 0; | |
466 | } | |
467 | ||
468 | #define usbhsg_dcp_disable usbhsg_pipe_disable | |
469 | static int usbhsg_pipe_disable(struct usbhsg_uep *uep) | |
470 | { | |
471 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
8a2c225d | 472 | struct usbhs_pkt *pkt; |
2f98382d KM |
473 | |
474 | /* | |
475 | ********* assume under spin lock ********* | |
476 | */ | |
477 | ||
e8d548d5 | 478 | usbhs_pipe_disable(pipe); |
2f98382d | 479 | |
2f98382d | 480 | while (1) { |
8a2c225d KM |
481 | pkt = usbhs_pkt_get(pipe); |
482 | if (!pkt) | |
2f98382d KM |
483 | break; |
484 | ||
8a2c225d | 485 | usbhs_pkt_pop(pkt); |
2f98382d KM |
486 | } |
487 | ||
2f98382d KM |
488 | return 0; |
489 | } | |
490 | ||
409ba9e7 KM |
491 | static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv) |
492 | { | |
493 | int i; | |
494 | struct usbhsg_uep *uep; | |
495 | ||
496 | usbhsg_for_each_uep_with_dcp(uep, gpriv, i) | |
497 | uep->pipe = NULL; | |
498 | } | |
499 | ||
2f98382d KM |
500 | /* |
501 | * | |
502 | * usb_ep_ops | |
503 | * | |
504 | */ | |
505 | static int usbhsg_ep_enable(struct usb_ep *ep, | |
506 | const struct usb_endpoint_descriptor *desc) | |
507 | { | |
508 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
509 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
510 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
511 | struct usbhs_pipe *pipe; | |
cb96632c | 512 | spinlock_t *lock; |
2f98382d KM |
513 | unsigned long flags; |
514 | int ret = -EIO; | |
515 | ||
409ba9e7 KM |
516 | /* |
517 | * if it already have pipe, | |
518 | * nothing to do | |
519 | */ | |
520 | if (uep->pipe) | |
521 | return 0; | |
522 | ||
2f98382d | 523 | /******************** spin lock ********************/ |
cb96632c | 524 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
525 | |
526 | pipe = usbhs_pipe_malloc(priv, desc); | |
527 | if (pipe) { | |
528 | uep->pipe = pipe; | |
529 | pipe->mod_private = uep; | |
2f98382d KM |
530 | |
531 | if (usb_endpoint_dir_in(desc)) | |
dad67397 | 532 | uep->handler = &usbhs_fifo_push_handler; |
2f98382d | 533 | else |
dad67397 | 534 | uep->handler = &usbhs_fifo_pop_handler; |
2f98382d KM |
535 | |
536 | ret = 0; | |
537 | } | |
cb96632c KM |
538 | |
539 | usbhsg_unlock(lock, &flags); | |
2f98382d KM |
540 | /******************** spin unlock ******************/ |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
545 | static int usbhsg_ep_disable(struct usb_ep *ep) | |
546 | { | |
547 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
548 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
cb96632c | 549 | spinlock_t *lock; |
2f98382d KM |
550 | unsigned long flags; |
551 | int ret; | |
552 | ||
553 | /******************** spin lock ********************/ | |
cb96632c KM |
554 | lock = usbhsg_trylock(gpriv, &flags); |
555 | ||
2f98382d | 556 | ret = usbhsg_pipe_disable(uep); |
cb96632c KM |
557 | |
558 | usbhsg_unlock(lock, &flags); | |
2f98382d KM |
559 | /******************** spin unlock ******************/ |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, | |
565 | gfp_t gfp_flags) | |
566 | { | |
567 | struct usbhsg_request *ureq; | |
568 | ||
569 | ureq = kzalloc(sizeof *ureq, gfp_flags); | |
570 | if (!ureq) | |
571 | return NULL; | |
572 | ||
6acb95d4 KM |
573 | usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); |
574 | ||
2f98382d KM |
575 | return &ureq->req; |
576 | } | |
577 | ||
578 | static void usbhsg_ep_free_request(struct usb_ep *ep, | |
579 | struct usb_request *req) | |
580 | { | |
581 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
582 | ||
6acb95d4 | 583 | WARN_ON(!list_empty(&ureq->pkt.node)); |
2f98382d KM |
584 | kfree(ureq); |
585 | } | |
586 | ||
587 | static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, | |
588 | gfp_t gfp_flags) | |
589 | { | |
590 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
591 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
592 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
593 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
cb96632c | 594 | spinlock_t *lock; |
2f98382d KM |
595 | unsigned long flags; |
596 | int ret = 0; | |
2f98382d KM |
597 | |
598 | /* | |
599 | * CAUTION [*endpoint queue*] | |
600 | * | |
601 | * This function will be called from usb_request :: complete | |
602 | * or usb driver timing. | |
603 | * If this function is called from usb_request :: complete, | |
604 | * it is already under spinlock on this driver. | |
605 | * but it is called frm usb driver, this function should call spinlock. | |
606 | * | |
cb96632c | 607 | * This function is using usbshg_trylock to solve this issue. |
2f98382d KM |
608 | * if "is_locked" is 1, this mean this function lock it. |
609 | * but if it is 0, this mean it is already under spin lock. | |
610 | * see also | |
611 | * CAUTION [*queue handler*] | |
612 | * CAUTION [*request complete*] | |
613 | */ | |
614 | ||
615 | /******************** spin lock ********************/ | |
cb96632c | 616 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
617 | |
618 | /* param check */ | |
619 | if (usbhsg_is_not_connected(gpriv) || | |
620 | unlikely(!gpriv->driver) || | |
621 | unlikely(!pipe)) | |
622 | ret = -ESHUTDOWN; | |
623 | else | |
624 | usbhsg_queue_push(uep, ureq); | |
625 | ||
cb96632c | 626 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
627 | /******************** spin unlock ******************/ |
628 | ||
dad67397 | 629 | usbhsg_queue_start(uep); |
2f98382d KM |
630 | |
631 | return ret; | |
632 | } | |
633 | ||
634 | static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
635 | { | |
636 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
637 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
638 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
cb96632c | 639 | spinlock_t *lock; |
2f98382d | 640 | unsigned long flags; |
2f98382d KM |
641 | |
642 | /* | |
643 | * see | |
644 | * CAUTION [*queue handler*] | |
645 | * CAUTION [*endpoint queue*] | |
646 | * CAUTION [*request complete*] | |
647 | */ | |
648 | ||
649 | /******************** spin lock ********************/ | |
cb96632c | 650 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
651 | |
652 | usbhsg_queue_pop(uep, ureq, -ECONNRESET); | |
653 | ||
cb96632c | 654 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
655 | /******************** spin unlock ******************/ |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) | |
661 | { | |
662 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
663 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
664 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
665 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
cb96632c | 666 | spinlock_t *lock; |
2f98382d KM |
667 | unsigned long flags; |
668 | int ret = -EAGAIN; | |
2f98382d KM |
669 | |
670 | /* | |
671 | * see | |
672 | * CAUTION [*queue handler*] | |
673 | * CAUTION [*endpoint queue*] | |
674 | * CAUTION [*request complete*] | |
675 | */ | |
676 | ||
677 | /******************** spin lock ********************/ | |
cb96632c | 678 | lock = usbhsg_trylock(gpriv, &flags); |
8a2c225d | 679 | if (!usbhs_pkt_get(pipe)) { |
2f98382d KM |
680 | |
681 | dev_dbg(dev, "set halt %d (pipe %d)\n", | |
682 | halt, usbhs_pipe_number(pipe)); | |
683 | ||
684 | if (halt) | |
e8d548d5 | 685 | usbhs_pipe_stall(pipe); |
2f98382d | 686 | else |
e8d548d5 | 687 | usbhs_pipe_disable(pipe); |
2f98382d KM |
688 | |
689 | if (halt && wedge) | |
690 | usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); | |
691 | else | |
692 | usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); | |
693 | ||
694 | ret = 0; | |
695 | } | |
696 | ||
cb96632c | 697 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
698 | /******************** spin unlock ******************/ |
699 | ||
700 | return ret; | |
701 | } | |
702 | ||
703 | static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) | |
704 | { | |
705 | return __usbhsg_ep_set_halt_wedge(ep, value, 0); | |
706 | } | |
707 | ||
708 | static int usbhsg_ep_set_wedge(struct usb_ep *ep) | |
709 | { | |
710 | return __usbhsg_ep_set_halt_wedge(ep, 1, 1); | |
711 | } | |
712 | ||
713 | static struct usb_ep_ops usbhsg_ep_ops = { | |
714 | .enable = usbhsg_ep_enable, | |
715 | .disable = usbhsg_ep_disable, | |
716 | ||
717 | .alloc_request = usbhsg_ep_alloc_request, | |
718 | .free_request = usbhsg_ep_free_request, | |
719 | ||
720 | .queue = usbhsg_ep_queue, | |
721 | .dequeue = usbhsg_ep_dequeue, | |
722 | ||
723 | .set_halt = usbhsg_ep_set_halt, | |
724 | .set_wedge = usbhsg_ep_set_wedge, | |
725 | }; | |
726 | ||
727 | /* | |
728 | * usb module start/end | |
729 | */ | |
730 | static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) | |
731 | { | |
732 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
733 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
734 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
735 | struct device *dev = usbhs_priv_to_dev(priv); | |
cb96632c | 736 | spinlock_t *lock; |
2f98382d KM |
737 | unsigned long flags; |
738 | ||
739 | /******************** spin lock ********************/ | |
cb96632c | 740 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
741 | |
742 | /* | |
743 | * enable interrupt and systems if ready | |
744 | */ | |
745 | usbhsg_status_set(gpriv, status); | |
746 | if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && | |
747 | usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) | |
748 | goto usbhsg_try_start_unlock; | |
749 | ||
750 | dev_dbg(dev, "start gadget\n"); | |
751 | ||
752 | /* | |
753 | * pipe initialize and enable DCP | |
754 | */ | |
4bd04811 | 755 | usbhs_pipe_init(priv, |
dad67397 KM |
756 | usbhsg_queue_done); |
757 | usbhs_fifo_init(priv); | |
409ba9e7 | 758 | usbhsg_uep_init(gpriv); |
2f98382d KM |
759 | usbhsg_dcp_enable(dcp); |
760 | ||
761 | /* | |
762 | * system config enble | |
763 | * - HI speed | |
764 | * - function | |
765 | * - usb module | |
766 | */ | |
767 | usbhs_sys_hispeed_ctrl(priv, 1); | |
768 | usbhs_sys_function_ctrl(priv, 1); | |
769 | usbhs_sys_usb_ctrl(priv, 1); | |
770 | ||
771 | /* | |
772 | * enable irq callback | |
773 | */ | |
774 | mod->irq_dev_state = usbhsg_irq_dev_state; | |
775 | mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; | |
2f98382d KM |
776 | usbhs_irq_callback_update(priv, mod); |
777 | ||
778 | usbhsg_try_start_unlock: | |
cb96632c | 779 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
780 | /******************** spin unlock ********************/ |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) | |
786 | { | |
787 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
788 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
789 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
790 | struct device *dev = usbhs_priv_to_dev(priv); | |
cb96632c | 791 | spinlock_t *lock; |
2f98382d KM |
792 | unsigned long flags; |
793 | ||
794 | /******************** spin lock ********************/ | |
cb96632c | 795 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
796 | |
797 | /* | |
798 | * disable interrupt and systems if 1st try | |
799 | */ | |
800 | usbhsg_status_clr(gpriv, status); | |
801 | if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && | |
802 | !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) | |
803 | goto usbhsg_try_stop_unlock; | |
804 | ||
dad67397 KM |
805 | usbhs_fifo_quit(priv); |
806 | ||
2f98382d KM |
807 | /* disable all irq */ |
808 | mod->irq_dev_state = NULL; | |
809 | mod->irq_ctrl_stage = NULL; | |
2f98382d KM |
810 | usbhs_irq_callback_update(priv, mod); |
811 | ||
812 | usbhsg_dcp_disable(dcp); | |
813 | ||
814 | gpriv->gadget.speed = USB_SPEED_UNKNOWN; | |
815 | ||
816 | /* disable sys */ | |
817 | usbhs_sys_hispeed_ctrl(priv, 0); | |
818 | usbhs_sys_function_ctrl(priv, 0); | |
819 | usbhs_sys_usb_ctrl(priv, 0); | |
820 | ||
cb96632c | 821 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
822 | /******************** spin unlock ********************/ |
823 | ||
824 | if (gpriv->driver && | |
825 | gpriv->driver->disconnect) | |
826 | gpriv->driver->disconnect(&gpriv->gadget); | |
827 | ||
828 | dev_dbg(dev, "stop gadget\n"); | |
829 | ||
830 | return 0; | |
831 | ||
832 | usbhsg_try_stop_unlock: | |
cb96632c | 833 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
834 | |
835 | return 0; | |
836 | } | |
837 | ||
838 | /* | |
839 | * | |
840 | * linux usb function | |
841 | * | |
842 | */ | |
843 | struct usbhsg_gpriv *the_controller; | |
844 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver, | |
845 | int (*bind)(struct usb_gadget *)) | |
846 | { | |
847 | struct usbhsg_gpriv *gpriv = the_controller; | |
848 | struct usbhs_priv *priv; | |
849 | struct device *dev; | |
850 | int ret; | |
851 | ||
852 | if (!bind || | |
853 | !driver || | |
854 | !driver->setup || | |
855 | driver->speed != USB_SPEED_HIGH) | |
856 | return -EINVAL; | |
857 | if (!gpriv) | |
858 | return -ENODEV; | |
859 | if (gpriv->driver) | |
860 | return -EBUSY; | |
861 | ||
862 | dev = usbhsg_gpriv_to_dev(gpriv); | |
863 | priv = usbhsg_gpriv_to_priv(gpriv); | |
864 | ||
865 | /* first hook up the driver ... */ | |
866 | gpriv->driver = driver; | |
867 | gpriv->gadget.dev.driver = &driver->driver; | |
868 | ||
869 | ret = device_add(&gpriv->gadget.dev); | |
870 | if (ret) { | |
871 | dev_err(dev, "device_add error %d\n", ret); | |
872 | goto add_fail; | |
873 | } | |
874 | ||
875 | ret = bind(&gpriv->gadget); | |
876 | if (ret) { | |
877 | dev_err(dev, "bind to driver %s error %d\n", | |
878 | driver->driver.name, ret); | |
879 | goto bind_fail; | |
880 | } | |
881 | ||
882 | dev_dbg(dev, "bind %s\n", driver->driver.name); | |
883 | ||
884 | return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); | |
885 | ||
886 | bind_fail: | |
887 | device_del(&gpriv->gadget.dev); | |
888 | add_fail: | |
889 | gpriv->driver = NULL; | |
890 | gpriv->gadget.dev.driver = NULL; | |
891 | ||
892 | return ret; | |
893 | } | |
894 | EXPORT_SYMBOL(usb_gadget_probe_driver); | |
895 | ||
896 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
897 | { | |
898 | struct usbhsg_gpriv *gpriv = the_controller; | |
899 | struct usbhs_priv *priv; | |
900 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
901 | ||
902 | if (!gpriv) | |
903 | return -ENODEV; | |
904 | ||
905 | if (!driver || | |
906 | !driver->unbind || | |
907 | driver != gpriv->driver) | |
908 | return -EINVAL; | |
909 | ||
910 | dev = usbhsg_gpriv_to_dev(gpriv); | |
911 | priv = usbhsg_gpriv_to_priv(gpriv); | |
912 | ||
913 | usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); | |
914 | device_del(&gpriv->gadget.dev); | |
915 | gpriv->driver = NULL; | |
916 | ||
917 | if (driver->disconnect) | |
918 | driver->disconnect(&gpriv->gadget); | |
919 | ||
920 | driver->unbind(&gpriv->gadget); | |
921 | dev_dbg(dev, "unbind %s\n", driver->driver.name); | |
922 | ||
923 | return 0; | |
924 | } | |
925 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
926 | ||
927 | /* | |
928 | * usb gadget ops | |
929 | */ | |
930 | static int usbhsg_get_frame(struct usb_gadget *gadget) | |
931 | { | |
932 | struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); | |
933 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
934 | ||
935 | return usbhs_frame_get_num(priv); | |
936 | } | |
937 | ||
938 | static struct usb_gadget_ops usbhsg_gadget_ops = { | |
939 | .get_frame = usbhsg_get_frame, | |
940 | }; | |
941 | ||
942 | static int usbhsg_start(struct usbhs_priv *priv) | |
943 | { | |
944 | return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); | |
945 | } | |
946 | ||
947 | static int usbhsg_stop(struct usbhs_priv *priv) | |
948 | { | |
949 | return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); | |
950 | } | |
951 | ||
952 | int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv) | |
953 | { | |
954 | struct usbhsg_gpriv *gpriv; | |
955 | struct usbhsg_uep *uep; | |
956 | struct device *dev = usbhs_priv_to_dev(priv); | |
957 | int pipe_size = usbhs_get_dparam(priv, pipe_size); | |
958 | int i; | |
959 | ||
960 | gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); | |
961 | if (!gpriv) { | |
962 | dev_err(dev, "Could not allocate gadget priv\n"); | |
963 | return -ENOMEM; | |
964 | } | |
965 | ||
966 | uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); | |
967 | if (!uep) { | |
968 | dev_err(dev, "Could not allocate ep\n"); | |
969 | goto usbhs_mod_gadget_probe_err_gpriv; | |
970 | } | |
971 | ||
972 | /* | |
973 | * CAUTION | |
974 | * | |
975 | * There is no guarantee that it is possible to access usb module here. | |
976 | * Don't accesses to it. | |
977 | * The accesse will be enable after "usbhsg_start" | |
978 | */ | |
979 | ||
980 | /* | |
981 | * register itself | |
982 | */ | |
983 | usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); | |
984 | ||
985 | /* init gpriv */ | |
986 | gpriv->mod.name = "gadget"; | |
987 | gpriv->mod.start = usbhsg_start; | |
988 | gpriv->mod.stop = usbhsg_stop; | |
989 | gpriv->uep = uep; | |
990 | gpriv->uep_size = pipe_size; | |
991 | usbhsg_status_init(gpriv); | |
992 | ||
993 | /* | |
994 | * init gadget | |
995 | */ | |
996 | device_initialize(&gpriv->gadget.dev); | |
997 | dev_set_name(&gpriv->gadget.dev, "gadget"); | |
998 | gpriv->gadget.dev.parent = dev; | |
999 | gpriv->gadget.name = "renesas_usbhs_udc"; | |
1000 | gpriv->gadget.ops = &usbhsg_gadget_ops; | |
1001 | gpriv->gadget.is_dualspeed = 1; | |
1002 | ||
1003 | INIT_LIST_HEAD(&gpriv->gadget.ep_list); | |
1004 | ||
1005 | /* | |
1006 | * init usb_ep | |
1007 | */ | |
1008 | usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { | |
1009 | uep->gpriv = gpriv; | |
1010 | snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); | |
1011 | ||
1012 | uep->ep.name = uep->ep_name; | |
1013 | uep->ep.ops = &usbhsg_ep_ops; | |
1014 | INIT_LIST_HEAD(&uep->ep.ep_list); | |
2f98382d KM |
1015 | |
1016 | /* init DCP */ | |
1017 | if (usbhsg_is_dcp(uep)) { | |
1018 | gpriv->gadget.ep0 = &uep->ep; | |
1019 | uep->ep.maxpacket = 64; | |
1020 | } | |
1021 | /* init normal pipe */ | |
1022 | else { | |
1023 | uep->ep.maxpacket = 512; | |
1024 | list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | the_controller = gpriv; | |
1029 | ||
1030 | dev_info(dev, "gadget probed\n"); | |
1031 | ||
1032 | return 0; | |
1033 | ||
1034 | usbhs_mod_gadget_probe_err_gpriv: | |
1035 | kfree(gpriv); | |
1036 | ||
1037 | return -ENOMEM; | |
1038 | } | |
1039 | ||
1040 | void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv) | |
1041 | { | |
1042 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
1043 | ||
1044 | kfree(gpriv); | |
1045 | } |