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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; | |
34 | struct usbhsg_pipe_handle; | |
35 | struct usbhsg_uep { | |
36 | struct usb_ep ep; | |
37 | struct usbhs_pipe *pipe; | |
2f98382d KM |
38 | |
39 | char ep_name[EP_NAME_SIZE]; | |
40 | ||
41 | struct usbhsg_gpriv *gpriv; | |
42 | struct usbhsg_pipe_handle *handler; | |
43 | }; | |
44 | ||
45 | struct usbhsg_gpriv { | |
46 | struct usb_gadget gadget; | |
47 | struct usbhs_mod mod; | |
48 | ||
49 | struct usbhsg_uep *uep; | |
50 | int uep_size; | |
51 | ||
52 | struct usb_gadget_driver *driver; | |
53 | ||
54 | u32 status; | |
55 | #define USBHSG_STATUS_STARTED (1 << 0) | |
56 | #define USBHSG_STATUS_REGISTERD (1 << 1) | |
57 | #define USBHSG_STATUS_WEDGE (1 << 2) | |
58 | }; | |
59 | ||
60 | struct usbhsg_pipe_handle { | |
61 | int (*prepare)(struct usbhsg_uep *uep, struct usbhsg_request *ureq); | |
62 | int (*try_run)(struct usbhsg_uep *uep, struct usbhsg_request *ureq); | |
63 | void (*irq_mask)(struct usbhsg_uep *uep, int enable); | |
64 | }; | |
65 | ||
66 | struct usbhsg_recip_handle { | |
67 | char *name; | |
68 | int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
69 | struct usb_ctrlrequest *ctrl); | |
70 | int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
71 | struct usb_ctrlrequest *ctrl); | |
72 | int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
73 | struct usb_ctrlrequest *ctrl); | |
74 | }; | |
75 | ||
76 | /* | |
77 | * macro | |
78 | */ | |
79 | #define usbhsg_priv_to_gpriv(priv) \ | |
80 | container_of( \ | |
81 | usbhs_mod_get(priv, USBHS_GADGET), \ | |
82 | struct usbhsg_gpriv, mod) | |
83 | ||
84 | #define __usbhsg_for_each_uep(start, pos, g, i) \ | |
85 | for (i = start, pos = (g)->uep; \ | |
86 | i < (g)->uep_size; \ | |
87 | i++, pos = (g)->uep + i) | |
88 | ||
89 | #define usbhsg_for_each_uep(pos, gpriv, i) \ | |
90 | __usbhsg_for_each_uep(1, pos, gpriv, i) | |
91 | ||
92 | #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \ | |
93 | __usbhsg_for_each_uep(0, pos, gpriv, i) | |
94 | ||
95 | #define usbhsg_gadget_to_gpriv(g)\ | |
96 | container_of(g, struct usbhsg_gpriv, gadget) | |
97 | ||
98 | #define usbhsg_req_to_ureq(r)\ | |
99 | container_of(r, struct usbhsg_request, req) | |
100 | ||
101 | #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep) | |
102 | #define usbhsg_gpriv_to_lock(gp) usbhs_priv_to_lock((gp)->mod.priv) | |
103 | #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv) | |
104 | #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv) | |
105 | #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep) | |
106 | #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i) | |
107 | #define usbhsg_uep_to_gpriv(u) ((u)->gpriv) | |
108 | #define usbhsg_uep_to_pipe(u) ((u)->pipe) | |
109 | #define usbhsg_pipe_to_uep(p) ((p)->mod_private) | |
110 | #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv)) | |
111 | ||
4bd04811 KM |
112 | #define usbhsg_ureq_to_pkt(u) (&(u)->pkt) |
113 | #define usbhsg_pkt_to_ureq(i) \ | |
114 | container_of(i, struct usbhsg_request, pkt) | |
115 | ||
2f98382d KM |
116 | #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN) |
117 | ||
118 | /* status */ | |
119 | #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0) | |
120 | #define usbhsg_status_set(gp, b) (gp->status |= b) | |
121 | #define usbhsg_status_clr(gp, b) (gp->status &= ~b) | |
122 | #define usbhsg_status_has(gp, b) (gp->status & b) | |
123 | ||
cb96632c KM |
124 | /* |
125 | * usbhsg_trylock | |
126 | * | |
127 | * This driver don't use spin_try_lock | |
128 | * to avoid warning of CONFIG_DEBUG_SPINLOCK | |
129 | */ | |
130 | static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv, | |
131 | unsigned long *flags) | |
132 | { | |
133 | spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv); | |
134 | ||
135 | /* check spin lock status | |
136 | * to avoid deadlock/nest */ | |
137 | if (spin_is_locked(lock)) | |
138 | return NULL; | |
139 | ||
140 | spin_lock_irqsave(lock, *flags); | |
141 | ||
142 | return lock; | |
143 | } | |
144 | ||
145 | static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags) | |
146 | { | |
147 | if (!lock) | |
148 | return; | |
149 | ||
150 | spin_unlock_irqrestore(lock, *flags); | |
151 | } | |
152 | ||
2f98382d KM |
153 | /* |
154 | * list push/pop | |
155 | */ | |
156 | static void usbhsg_queue_push(struct usbhsg_uep *uep, | |
157 | struct usbhsg_request *ureq) | |
158 | { | |
159 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
160 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
161 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
6acb95d4 | 162 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); |
2f98382d KM |
163 | |
164 | /* | |
165 | ********* assume under spin lock ********* | |
166 | */ | |
6acb95d4 | 167 | usbhs_pkt_push(pipe, pkt); |
2f98382d KM |
168 | ureq->req.actual = 0; |
169 | ureq->req.status = -EINPROGRESS; | |
170 | ||
171 | dev_dbg(dev, "pipe %d : queue push (%d)\n", | |
172 | usbhs_pipe_number(pipe), | |
173 | ureq->req.length); | |
174 | } | |
175 | ||
176 | static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep) | |
177 | { | |
6acb95d4 KM |
178 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); |
179 | struct usbhs_pkt *pkt = usbhs_pkt_get(pipe); | |
180 | ||
2f98382d KM |
181 | /* |
182 | ********* assume under spin lock ********* | |
183 | */ | |
6acb95d4 KM |
184 | if (!pkt) |
185 | return 0; | |
2f98382d | 186 | |
6acb95d4 | 187 | return usbhsg_pkt_to_ureq(pkt); |
2f98382d KM |
188 | } |
189 | ||
190 | #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1); | |
191 | #define usbhsg_queue_handle(uep) __usbhsg_queue_handler(uep, 0); | |
192 | static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare) | |
193 | { | |
194 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
195 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
196 | struct usbhsg_request *ureq; | |
cb96632c | 197 | spinlock_t *lock; |
2f98382d | 198 | unsigned long flags; |
2f98382d KM |
199 | int ret = 0; |
200 | ||
201 | if (!uep->handler) { | |
202 | dev_err(dev, "no handler function\n"); | |
203 | return -EIO; | |
204 | } | |
205 | ||
206 | /* | |
207 | * CAUTION [*queue handler*] | |
208 | * | |
209 | * This function will be called for start/restart queue operation. | |
210 | * OTOH the most much worry for USB driver is spinlock nest. | |
211 | * Specially it are | |
212 | * - usb_ep_ops :: queue | |
213 | * - usb_request :: complete | |
214 | * | |
215 | * But the caller of this function need not care about spinlock. | |
cb96632c | 216 | * This function is using usbhsg_trylock for it. |
2f98382d KM |
217 | * if "is_locked" is 1, this mean this function lock it. |
218 | * but if it is 0, this mean it is already under spin lock. | |
219 | * see also | |
220 | * CAUTION [*endpoint queue*] | |
221 | * CAUTION [*request complete*] | |
222 | */ | |
223 | ||
224 | /****************** spin try lock *******************/ | |
cb96632c KM |
225 | lock = usbhsg_trylock(gpriv, &flags); |
226 | ||
2f98382d KM |
227 | ureq = usbhsg_queue_get(uep); |
228 | if (ureq) { | |
229 | if (prepare) | |
230 | ret = uep->handler->prepare(uep, ureq); | |
231 | else | |
232 | ret = uep->handler->try_run(uep, ureq); | |
233 | } | |
cb96632c | 234 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
235 | /******************** spin unlock ******************/ |
236 | ||
237 | return ret; | |
238 | } | |
239 | ||
240 | static void usbhsg_queue_pop(struct usbhsg_uep *uep, | |
241 | struct usbhsg_request *ureq, | |
242 | int status) | |
243 | { | |
244 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
245 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
246 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
6acb95d4 | 247 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); |
2f98382d KM |
248 | |
249 | /* | |
250 | ********* assume under spin lock ********* | |
251 | */ | |
252 | ||
253 | /* | |
254 | * CAUTION [*request complete*] | |
255 | * | |
256 | * There is a possibility not to be called in correct order | |
257 | * if "complete" is called without spinlock. | |
258 | * | |
259 | * So, this function assume it is under spinlock, | |
260 | * and call usb_request :: complete. | |
261 | * | |
262 | * But this "complete" will push next usb_request. | |
263 | * It mean "usb_ep_ops :: queue" which is using spinlock is called | |
264 | * under spinlock. | |
265 | * | |
cb96632c | 266 | * To avoid dead-lock, this driver is using usbhsg_trylock. |
2f98382d KM |
267 | * CAUTION [*endpoint queue*] |
268 | * CAUTION [*queue handler*] | |
269 | */ | |
270 | ||
271 | dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe)); | |
272 | ||
6acb95d4 | 273 | usbhs_pkt_pop(pkt); |
2f98382d KM |
274 | |
275 | ureq->req.status = status; | |
276 | ureq->req.complete(&uep->ep, &ureq->req); | |
277 | ||
278 | /* more request ? */ | |
279 | if (0 == status) | |
280 | usbhsg_queue_prepare(uep); | |
281 | } | |
282 | ||
283 | /* | |
284 | * irq enable/disable function | |
285 | */ | |
286 | #define usbhsg_irq_callback_ctrl(uep, status, enable) \ | |
287 | ({ \ | |
288 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); \ | |
289 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); \ | |
290 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); \ | |
291 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ | |
292 | if (!mod) \ | |
293 | return; \ | |
294 | if (enable) \ | |
295 | mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \ | |
296 | else \ | |
297 | mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \ | |
298 | usbhs_irq_callback_update(priv, mod); \ | |
299 | }) | |
300 | ||
301 | static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable) | |
302 | { | |
303 | usbhsg_irq_callback_ctrl(uep, bempsts, enable); | |
304 | } | |
305 | ||
306 | static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable) | |
307 | { | |
308 | usbhsg_irq_callback_ctrl(uep, brdysts, enable); | |
309 | } | |
310 | ||
311 | /* | |
312 | * handler function | |
313 | */ | |
314 | static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep, | |
315 | struct usbhsg_request *ureq) | |
316 | { | |
317 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
318 | ||
319 | /* | |
320 | ********* assume under spin lock ********* | |
321 | */ | |
322 | ||
323 | usbhs_dcp_control_transfer_done(pipe); | |
324 | usbhsg_queue_pop(uep, ureq, 0); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
4bd04811 KM |
329 | /* |
330 | * packet send hander | |
331 | */ | |
332 | static void usbhsg_try_run_send_packet_bh(struct usbhs_pkt *pkt) | |
2f98382d | 333 | { |
4bd04811 KM |
334 | struct usbhs_pipe *pipe = pkt->pipe; |
335 | struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); | |
336 | struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); | |
2f98382d KM |
337 | struct usb_request *req = &ureq->req; |
338 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
339 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
4bd04811 | 340 | int remainder, send, maxp; |
2f98382d KM |
341 | int is_done = 0; |
342 | int enable; | |
2f98382d | 343 | |
4bd04811 KM |
344 | maxp = pkt->maxp; |
345 | send = pkt->actual; | |
346 | remainder = pkt->length; | |
2f98382d KM |
347 | |
348 | /* | |
2f98382d KM |
349 | * send = 0 : send zero packet |
350 | * send > 0 : send data | |
351 | * | |
352 | * send <= max_packet | |
353 | */ | |
4bd04811 | 354 | req->actual += send; |
2f98382d KM |
355 | |
356 | /* send all packet ? */ | |
357 | if (send < remainder) | |
358 | is_done = 0; /* there are remainder data */ | |
359 | else if (send < maxp) | |
360 | is_done = 1; /* short packet */ | |
361 | else | |
362 | is_done = !req->zero; /* send zero packet ? */ | |
363 | ||
364 | dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", | |
365 | usbhs_pipe_number(pipe), | |
366 | remainder, send, is_done, req->zero); | |
367 | ||
368 | /* | |
369 | * enable interrupt and send again in irq handler | |
370 | * if it still have remainder data which should be sent. | |
371 | */ | |
372 | enable = !is_done; | |
373 | uep->handler->irq_mask(uep, enable); | |
374 | ||
2f98382d KM |
375 | /* |
376 | * all data were sent ? | |
377 | */ | |
378 | if (is_done) { | |
379 | /* it care below call in | |
380 | "function mode" */ | |
381 | if (usbhsg_is_dcp(uep)) | |
382 | usbhs_dcp_control_transfer_done(pipe); | |
383 | ||
384 | usbhsg_queue_pop(uep, ureq, 0); | |
385 | } | |
4bd04811 KM |
386 | } |
387 | ||
388 | static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep, | |
389 | struct usbhsg_request *ureq) | |
390 | { | |
4bd04811 KM |
391 | struct usb_request *req = &ureq->req; |
392 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); | |
393 | int ret; | |
394 | ||
395 | /* | |
396 | ********* assume under spin lock ********* | |
397 | */ | |
398 | ||
6acb95d4 | 399 | usbhs_pkt_update(pkt, |
4bd04811 KM |
400 | req->buf + req->actual, |
401 | req->length - req->actual); | |
402 | ||
403 | ret = usbhs_fifo_write(pkt); | |
404 | if (ret < 0) { | |
405 | /* pipe is busy. | |
406 | * retry in interrupt */ | |
407 | uep->handler->irq_mask(uep, 1); | |
408 | } | |
2f98382d KM |
409 | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep, | |
414 | struct usbhsg_request *ureq) | |
415 | { | |
416 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
417 | ||
418 | /* | |
419 | ********* assume under spin lock ********* | |
420 | */ | |
421 | ||
422 | usbhs_fifo_prepare_write(pipe); | |
423 | usbhsg_try_run_send_packet(uep, ureq); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
4bd04811 KM |
428 | /* |
429 | * packet recv hander | |
430 | */ | |
431 | static void usbhsg_try_run_receive_packet_bh(struct usbhs_pkt *pkt) | |
2f98382d | 432 | { |
4bd04811 KM |
433 | struct usbhs_pipe *pipe = pkt->pipe; |
434 | struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe); | |
435 | struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt); | |
2f98382d KM |
436 | struct usb_request *req = &ureq->req; |
437 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
438 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
4bd04811 | 439 | int remainder, recv, maxp; |
2f98382d KM |
440 | int is_done = 0; |
441 | ||
4bd04811 KM |
442 | maxp = pkt->maxp; |
443 | remainder = pkt->length; | |
444 | recv = pkt->actual; | |
2f98382d | 445 | |
2f98382d KM |
446 | /* |
447 | * recv < 0 : pipe busy | |
448 | * recv >= 0 : receive data | |
449 | * | |
450 | * recv <= max_packet | |
451 | */ | |
2f98382d KM |
452 | |
453 | /* update parameters */ | |
454 | req->actual += recv; | |
455 | ||
456 | if ((recv == remainder) || /* receive all data */ | |
457 | (recv < maxp)) /* short packet */ | |
458 | is_done = 1; | |
459 | ||
460 | dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", | |
461 | usbhs_pipe_number(pipe), | |
462 | remainder, recv, is_done, req->zero); | |
463 | ||
464 | /* read all data ? */ | |
465 | if (is_done) { | |
466 | int disable = 0; | |
467 | ||
468 | uep->handler->irq_mask(uep, disable); | |
e8d548d5 | 469 | usbhs_pipe_disable(pipe); |
2f98382d KM |
470 | usbhsg_queue_pop(uep, ureq, 0); |
471 | } | |
4bd04811 | 472 | } |
2f98382d | 473 | |
4bd04811 KM |
474 | static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep, |
475 | struct usbhsg_request *ureq) | |
476 | { | |
4bd04811 KM |
477 | struct usb_request *req = &ureq->req; |
478 | struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq); | |
479 | ||
480 | /* | |
481 | ********* assume under spin lock ********* | |
482 | */ | |
483 | ||
6acb95d4 | 484 | usbhs_pkt_update(pkt, |
4bd04811 KM |
485 | req->buf + req->actual, |
486 | req->length - req->actual); | |
487 | ||
488 | return usbhs_fifo_read(pkt); | |
2f98382d KM |
489 | } |
490 | ||
491 | static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep, | |
492 | struct usbhsg_request *ureq) | |
493 | { | |
494 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
495 | int enable = 1; | |
496 | int ret; | |
497 | ||
498 | /* | |
499 | ********* assume under spin lock ********* | |
500 | */ | |
501 | ||
502 | ret = usbhs_fifo_prepare_read(pipe); | |
503 | if (ret < 0) | |
504 | return ret; | |
505 | ||
506 | /* | |
507 | * data will be read in interrupt handler | |
508 | */ | |
509 | uep->handler->irq_mask(uep, enable); | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
514 | static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = { | |
515 | .prepare = usbhsg_prepare_send_packet, | |
516 | .try_run = usbhsg_try_run_send_packet, | |
517 | .irq_mask = usbhsg_irq_empty_ctrl, | |
518 | }; | |
519 | ||
520 | static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = { | |
521 | .prepare = usbhsg_prepare_send_packet, | |
522 | .try_run = usbhsg_try_run_send_packet, | |
523 | .irq_mask = usbhsg_irq_ready_ctrl, | |
524 | }; | |
525 | ||
526 | static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = { | |
527 | .prepare = usbhsg_prepare_receive_packet, | |
528 | .try_run = usbhsg_try_run_receive_packet, | |
529 | .irq_mask = usbhsg_irq_ready_ctrl, | |
530 | }; | |
531 | ||
532 | static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = { | |
533 | .prepare = usbhsg_try_run_ctrl_stage_end, | |
534 | .try_run = usbhsg_try_run_ctrl_stage_end, | |
535 | }; | |
536 | ||
537 | /* | |
538 | * DCP pipe can NOT use "ready interrupt" for "send" | |
539 | * it should use "empty" interrupt. | |
540 | * see | |
541 | * "Operation" - "Interrupt Function" - "BRDY Interrupt" | |
542 | * | |
543 | * on the other hand, normal pipe can use "ready interrupt" for "send" | |
544 | * even though it is single/double buffer | |
545 | */ | |
546 | #define usbhsg_handler_send_ctrl usbhsg_handler_send_by_empty | |
547 | #define usbhsg_handler_recv_ctrl usbhsg_handler_recv_by_ready | |
548 | ||
549 | #define usbhsg_handler_send_packet usbhsg_handler_send_by_ready | |
550 | #define usbhsg_handler_recv_packet usbhsg_handler_recv_by_ready | |
551 | ||
552 | /* | |
553 | * USB_TYPE_STANDARD / clear feature functions | |
554 | */ | |
555 | static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv, | |
556 | struct usbhsg_uep *uep, | |
557 | struct usb_ctrlrequest *ctrl) | |
558 | { | |
559 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
560 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
561 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); | |
562 | ||
563 | usbhs_dcp_control_transfer_done(pipe); | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv, | |
569 | struct usbhsg_uep *uep, | |
570 | struct usb_ctrlrequest *ctrl) | |
571 | { | |
572 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
573 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
574 | ||
575 | if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) { | |
e8d548d5 | 576 | usbhs_pipe_disable(pipe); |
2f98382d | 577 | usbhs_pipe_clear_sequence(pipe); |
e8d548d5 | 578 | usbhs_pipe_enable(pipe); |
2f98382d KM |
579 | } |
580 | ||
581 | usbhsg_recip_handler_std_control_done(priv, uep, ctrl); | |
582 | ||
583 | usbhsg_queue_prepare(uep); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | struct usbhsg_recip_handle req_clear_feature = { | |
589 | .name = "clear feature", | |
590 | .device = usbhsg_recip_handler_std_control_done, | |
591 | .interface = usbhsg_recip_handler_std_control_done, | |
592 | .endpoint = usbhsg_recip_handler_std_clear_endpoint, | |
593 | }; | |
594 | ||
595 | /* | |
596 | * USB_TYPE handler | |
597 | */ | |
598 | static int usbhsg_recip_run_handle(struct usbhs_priv *priv, | |
599 | struct usbhsg_recip_handle *handler, | |
600 | struct usb_ctrlrequest *ctrl) | |
601 | { | |
602 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
603 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
604 | struct usbhsg_uep *uep; | |
605 | int recip = ctrl->bRequestType & USB_RECIP_MASK; | |
606 | int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
607 | int ret; | |
608 | int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep, | |
609 | struct usb_ctrlrequest *ctrl); | |
610 | char *msg; | |
611 | ||
612 | uep = usbhsg_gpriv_to_nth_uep(gpriv, nth); | |
9a28b7bd KM |
613 | if (!usbhsg_uep_to_pipe(uep)) { |
614 | dev_err(dev, "wrong recip request\n"); | |
615 | return -EINVAL; | |
616 | } | |
2f98382d KM |
617 | |
618 | switch (recip) { | |
619 | case USB_RECIP_DEVICE: | |
620 | msg = "DEVICE"; | |
621 | func = handler->device; | |
622 | break; | |
623 | case USB_RECIP_INTERFACE: | |
624 | msg = "INTERFACE"; | |
625 | func = handler->interface; | |
626 | break; | |
627 | case USB_RECIP_ENDPOINT: | |
628 | msg = "ENDPOINT"; | |
629 | func = handler->endpoint; | |
630 | break; | |
631 | default: | |
632 | dev_warn(dev, "unsupported RECIP(%d)\n", recip); | |
633 | func = NULL; | |
634 | ret = -EINVAL; | |
635 | } | |
636 | ||
637 | if (func) { | |
638 | dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg); | |
639 | ret = func(priv, uep, ctrl); | |
640 | } | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
645 | /* | |
646 | * irq functions | |
647 | * | |
648 | * it will be called from usbhs_interrupt | |
649 | */ | |
650 | static int usbhsg_irq_dev_state(struct usbhs_priv *priv, | |
651 | struct usbhs_irq_state *irq_state) | |
652 | { | |
653 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
654 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
655 | ||
656 | gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state); | |
657 | ||
658 | dev_dbg(dev, "state = %x : speed : %d\n", | |
659 | usbhs_status_get_device_state(irq_state), | |
660 | gpriv->gadget.speed); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv, | |
666 | struct usbhs_irq_state *irq_state) | |
667 | { | |
668 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
669 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
670 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp); | |
671 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
672 | struct usb_ctrlrequest ctrl; | |
673 | struct usbhsg_recip_handle *recip_handler = NULL; | |
674 | int stage = usbhs_status_get_ctrl_stage(irq_state); | |
675 | int ret = 0; | |
676 | ||
677 | dev_dbg(dev, "stage = %d\n", stage); | |
678 | ||
679 | /* | |
680 | * see Manual | |
681 | * | |
682 | * "Operation" | |
683 | * - "Interrupt Function" | |
684 | * - "Control Transfer Stage Transition Interrupt" | |
685 | * - Fig. "Control Transfer Stage Transitions" | |
686 | */ | |
687 | ||
688 | switch (stage) { | |
689 | case READ_DATA_STAGE: | |
690 | dcp->handler = &usbhsg_handler_send_ctrl; | |
691 | break; | |
692 | case WRITE_DATA_STAGE: | |
693 | dcp->handler = &usbhsg_handler_recv_ctrl; | |
694 | break; | |
695 | case NODATA_STATUS_STAGE: | |
696 | dcp->handler = &usbhsg_handler_ctrl_stage_end; | |
697 | break; | |
698 | default: | |
699 | return ret; | |
700 | } | |
701 | ||
702 | /* | |
703 | * get usb request | |
704 | */ | |
705 | usbhs_usbreq_get_val(priv, &ctrl); | |
706 | ||
707 | switch (ctrl.bRequestType & USB_TYPE_MASK) { | |
708 | case USB_TYPE_STANDARD: | |
709 | switch (ctrl.bRequest) { | |
710 | case USB_REQ_CLEAR_FEATURE: | |
711 | recip_handler = &req_clear_feature; | |
712 | break; | |
713 | } | |
714 | } | |
715 | ||
716 | /* | |
717 | * setup stage / run recip | |
718 | */ | |
719 | if (recip_handler) | |
720 | ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl); | |
721 | else | |
722 | ret = gpriv->driver->setup(&gpriv->gadget, &ctrl); | |
723 | ||
724 | if (ret < 0) | |
e8d548d5 | 725 | usbhs_pipe_stall(pipe); |
2f98382d KM |
726 | |
727 | return ret; | |
728 | } | |
729 | ||
730 | static int usbhsg_irq_empty(struct usbhs_priv *priv, | |
731 | struct usbhs_irq_state *irq_state) | |
732 | { | |
733 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
734 | struct usbhsg_uep *uep; | |
735 | struct usbhs_pipe *pipe; | |
736 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
737 | int i, ret; | |
738 | ||
739 | if (!irq_state->bempsts) { | |
740 | dev_err(dev, "debug %s !!\n", __func__); | |
741 | return -EIO; | |
742 | } | |
743 | ||
744 | dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); | |
745 | ||
746 | /* | |
747 | * search interrupted "pipe" | |
748 | * not "uep". | |
749 | */ | |
750 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
751 | if (!(irq_state->bempsts & (1 << i))) | |
752 | continue; | |
753 | ||
754 | uep = usbhsg_pipe_to_uep(pipe); | |
755 | ret = usbhsg_queue_handle(uep); | |
756 | if (ret < 0) | |
757 | dev_err(dev, "send error %d : %d\n", i, ret); | |
758 | } | |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | static int usbhsg_irq_ready(struct usbhs_priv *priv, | |
764 | struct usbhs_irq_state *irq_state) | |
765 | { | |
766 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
767 | struct usbhsg_uep *uep; | |
768 | struct usbhs_pipe *pipe; | |
769 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
770 | int i, ret; | |
771 | ||
772 | if (!irq_state->brdysts) { | |
773 | dev_err(dev, "debug %s !!\n", __func__); | |
774 | return -EIO; | |
775 | } | |
776 | ||
777 | dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); | |
778 | ||
779 | /* | |
780 | * search interrupted "pipe" | |
781 | * not "uep". | |
782 | */ | |
783 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
784 | if (!(irq_state->brdysts & (1 << i))) | |
785 | continue; | |
786 | ||
787 | uep = usbhsg_pipe_to_uep(pipe); | |
788 | ret = usbhsg_queue_handle(uep); | |
789 | if (ret < 0) | |
790 | dev_err(dev, "receive error %d : %d\n", i, ret); | |
791 | } | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | /* | |
797 | * | |
798 | * usb_dcp_ops | |
799 | * | |
800 | */ | |
801 | static int usbhsg_dcp_enable(struct usbhsg_uep *uep) | |
802 | { | |
803 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
804 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
805 | struct usbhs_pipe *pipe; | |
806 | ||
807 | /* | |
808 | ********* assume under spin lock ********* | |
809 | */ | |
810 | ||
811 | pipe = usbhs_dcp_malloc(priv); | |
812 | if (!pipe) | |
813 | return -EIO; | |
814 | ||
815 | uep->pipe = pipe; | |
816 | uep->pipe->mod_private = uep; | |
2f98382d KM |
817 | |
818 | return 0; | |
819 | } | |
820 | ||
821 | #define usbhsg_dcp_disable usbhsg_pipe_disable | |
822 | static int usbhsg_pipe_disable(struct usbhsg_uep *uep) | |
823 | { | |
824 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
825 | struct usbhsg_request *ureq; | |
826 | int disable = 0; | |
827 | ||
828 | /* | |
829 | ********* assume under spin lock ********* | |
830 | */ | |
831 | ||
e8d548d5 | 832 | usbhs_pipe_disable(pipe); |
2f98382d KM |
833 | |
834 | /* | |
835 | * disable pipe irq | |
836 | */ | |
837 | usbhsg_irq_empty_ctrl(uep, disable); | |
838 | usbhsg_irq_ready_ctrl(uep, disable); | |
839 | ||
840 | while (1) { | |
841 | ureq = usbhsg_queue_get(uep); | |
842 | if (!ureq) | |
843 | break; | |
844 | ||
845 | usbhsg_queue_pop(uep, ureq, -ECONNRESET); | |
846 | } | |
847 | ||
2f98382d KM |
848 | return 0; |
849 | } | |
850 | ||
409ba9e7 KM |
851 | static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv) |
852 | { | |
853 | int i; | |
854 | struct usbhsg_uep *uep; | |
855 | ||
856 | usbhsg_for_each_uep_with_dcp(uep, gpriv, i) | |
857 | uep->pipe = NULL; | |
858 | } | |
859 | ||
2f98382d KM |
860 | /* |
861 | * | |
862 | * usb_ep_ops | |
863 | * | |
864 | */ | |
865 | static int usbhsg_ep_enable(struct usb_ep *ep, | |
866 | const struct usb_endpoint_descriptor *desc) | |
867 | { | |
868 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
869 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
870 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
871 | struct usbhs_pipe *pipe; | |
cb96632c | 872 | spinlock_t *lock; |
2f98382d KM |
873 | unsigned long flags; |
874 | int ret = -EIO; | |
875 | ||
409ba9e7 KM |
876 | /* |
877 | * if it already have pipe, | |
878 | * nothing to do | |
879 | */ | |
880 | if (uep->pipe) | |
881 | return 0; | |
882 | ||
2f98382d | 883 | /******************** spin lock ********************/ |
cb96632c | 884 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
885 | |
886 | pipe = usbhs_pipe_malloc(priv, desc); | |
887 | if (pipe) { | |
888 | uep->pipe = pipe; | |
889 | pipe->mod_private = uep; | |
2f98382d KM |
890 | |
891 | if (usb_endpoint_dir_in(desc)) | |
892 | uep->handler = &usbhsg_handler_send_packet; | |
893 | else | |
894 | uep->handler = &usbhsg_handler_recv_packet; | |
895 | ||
896 | ret = 0; | |
897 | } | |
cb96632c KM |
898 | |
899 | usbhsg_unlock(lock, &flags); | |
2f98382d KM |
900 | /******************** spin unlock ******************/ |
901 | ||
902 | return ret; | |
903 | } | |
904 | ||
905 | static int usbhsg_ep_disable(struct usb_ep *ep) | |
906 | { | |
907 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
908 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
cb96632c | 909 | spinlock_t *lock; |
2f98382d KM |
910 | unsigned long flags; |
911 | int ret; | |
912 | ||
913 | /******************** spin lock ********************/ | |
cb96632c KM |
914 | lock = usbhsg_trylock(gpriv, &flags); |
915 | ||
2f98382d | 916 | ret = usbhsg_pipe_disable(uep); |
cb96632c KM |
917 | |
918 | usbhsg_unlock(lock, &flags); | |
2f98382d KM |
919 | /******************** spin unlock ******************/ |
920 | ||
921 | return ret; | |
922 | } | |
923 | ||
924 | static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep, | |
925 | gfp_t gfp_flags) | |
926 | { | |
927 | struct usbhsg_request *ureq; | |
928 | ||
929 | ureq = kzalloc(sizeof *ureq, gfp_flags); | |
930 | if (!ureq) | |
931 | return NULL; | |
932 | ||
6acb95d4 KM |
933 | usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq)); |
934 | ||
2f98382d KM |
935 | return &ureq->req; |
936 | } | |
937 | ||
938 | static void usbhsg_ep_free_request(struct usb_ep *ep, | |
939 | struct usb_request *req) | |
940 | { | |
941 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
942 | ||
6acb95d4 | 943 | WARN_ON(!list_empty(&ureq->pkt.node)); |
2f98382d KM |
944 | kfree(ureq); |
945 | } | |
946 | ||
947 | static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req, | |
948 | gfp_t gfp_flags) | |
949 | { | |
950 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
951 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
952 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
953 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
cb96632c | 954 | spinlock_t *lock; |
2f98382d KM |
955 | unsigned long flags; |
956 | int ret = 0; | |
2f98382d KM |
957 | |
958 | /* | |
959 | * CAUTION [*endpoint queue*] | |
960 | * | |
961 | * This function will be called from usb_request :: complete | |
962 | * or usb driver timing. | |
963 | * If this function is called from usb_request :: complete, | |
964 | * it is already under spinlock on this driver. | |
965 | * but it is called frm usb driver, this function should call spinlock. | |
966 | * | |
cb96632c | 967 | * This function is using usbshg_trylock to solve this issue. |
2f98382d KM |
968 | * if "is_locked" is 1, this mean this function lock it. |
969 | * but if it is 0, this mean it is already under spin lock. | |
970 | * see also | |
971 | * CAUTION [*queue handler*] | |
972 | * CAUTION [*request complete*] | |
973 | */ | |
974 | ||
975 | /******************** spin lock ********************/ | |
cb96632c | 976 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
977 | |
978 | /* param check */ | |
979 | if (usbhsg_is_not_connected(gpriv) || | |
980 | unlikely(!gpriv->driver) || | |
981 | unlikely(!pipe)) | |
982 | ret = -ESHUTDOWN; | |
983 | else | |
984 | usbhsg_queue_push(uep, ureq); | |
985 | ||
cb96632c | 986 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
987 | /******************** spin unlock ******************/ |
988 | ||
989 | usbhsg_queue_prepare(uep); | |
990 | ||
991 | return ret; | |
992 | } | |
993 | ||
994 | static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
995 | { | |
996 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
997 | struct usbhsg_request *ureq = usbhsg_req_to_ureq(req); | |
998 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
cb96632c | 999 | spinlock_t *lock; |
2f98382d | 1000 | unsigned long flags; |
2f98382d KM |
1001 | |
1002 | /* | |
1003 | * see | |
1004 | * CAUTION [*queue handler*] | |
1005 | * CAUTION [*endpoint queue*] | |
1006 | * CAUTION [*request complete*] | |
1007 | */ | |
1008 | ||
1009 | /******************** spin lock ********************/ | |
cb96632c | 1010 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
1011 | |
1012 | usbhsg_queue_pop(uep, ureq, -ECONNRESET); | |
1013 | ||
cb96632c | 1014 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
1015 | /******************** spin unlock ******************/ |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge) | |
1021 | { | |
1022 | struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep); | |
1023 | struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep); | |
1024 | struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep); | |
1025 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
cb96632c | 1026 | spinlock_t *lock; |
2f98382d KM |
1027 | unsigned long flags; |
1028 | int ret = -EAGAIN; | |
2f98382d KM |
1029 | |
1030 | /* | |
1031 | * see | |
1032 | * CAUTION [*queue handler*] | |
1033 | * CAUTION [*endpoint queue*] | |
1034 | * CAUTION [*request complete*] | |
1035 | */ | |
1036 | ||
1037 | /******************** spin lock ********************/ | |
cb96632c | 1038 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
1039 | if (!usbhsg_queue_get(uep)) { |
1040 | ||
1041 | dev_dbg(dev, "set halt %d (pipe %d)\n", | |
1042 | halt, usbhs_pipe_number(pipe)); | |
1043 | ||
1044 | if (halt) | |
e8d548d5 | 1045 | usbhs_pipe_stall(pipe); |
2f98382d | 1046 | else |
e8d548d5 | 1047 | usbhs_pipe_disable(pipe); |
2f98382d KM |
1048 | |
1049 | if (halt && wedge) | |
1050 | usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE); | |
1051 | else | |
1052 | usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE); | |
1053 | ||
1054 | ret = 0; | |
1055 | } | |
1056 | ||
cb96632c | 1057 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
1058 | /******************** spin unlock ******************/ |
1059 | ||
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static int usbhsg_ep_set_halt(struct usb_ep *ep, int value) | |
1064 | { | |
1065 | return __usbhsg_ep_set_halt_wedge(ep, value, 0); | |
1066 | } | |
1067 | ||
1068 | static int usbhsg_ep_set_wedge(struct usb_ep *ep) | |
1069 | { | |
1070 | return __usbhsg_ep_set_halt_wedge(ep, 1, 1); | |
1071 | } | |
1072 | ||
1073 | static struct usb_ep_ops usbhsg_ep_ops = { | |
1074 | .enable = usbhsg_ep_enable, | |
1075 | .disable = usbhsg_ep_disable, | |
1076 | ||
1077 | .alloc_request = usbhsg_ep_alloc_request, | |
1078 | .free_request = usbhsg_ep_free_request, | |
1079 | ||
1080 | .queue = usbhsg_ep_queue, | |
1081 | .dequeue = usbhsg_ep_dequeue, | |
1082 | ||
1083 | .set_halt = usbhsg_ep_set_halt, | |
1084 | .set_wedge = usbhsg_ep_set_wedge, | |
1085 | }; | |
1086 | ||
1087 | /* | |
1088 | * usb module start/end | |
1089 | */ | |
1090 | static int usbhsg_try_start(struct usbhs_priv *priv, u32 status) | |
1091 | { | |
1092 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
1093 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
1094 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
1095 | struct device *dev = usbhs_priv_to_dev(priv); | |
cb96632c | 1096 | spinlock_t *lock; |
2f98382d KM |
1097 | unsigned long flags; |
1098 | ||
1099 | /******************** spin lock ********************/ | |
cb96632c | 1100 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
1101 | |
1102 | /* | |
1103 | * enable interrupt and systems if ready | |
1104 | */ | |
1105 | usbhsg_status_set(gpriv, status); | |
1106 | if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && | |
1107 | usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))) | |
1108 | goto usbhsg_try_start_unlock; | |
1109 | ||
1110 | dev_dbg(dev, "start gadget\n"); | |
1111 | ||
1112 | /* | |
1113 | * pipe initialize and enable DCP | |
1114 | */ | |
4bd04811 KM |
1115 | usbhs_pipe_init(priv, |
1116 | usbhsg_try_run_send_packet_bh, | |
1117 | usbhsg_try_run_receive_packet_bh); | |
409ba9e7 | 1118 | usbhsg_uep_init(gpriv); |
2f98382d KM |
1119 | usbhsg_dcp_enable(dcp); |
1120 | ||
1121 | /* | |
1122 | * system config enble | |
1123 | * - HI speed | |
1124 | * - function | |
1125 | * - usb module | |
1126 | */ | |
1127 | usbhs_sys_hispeed_ctrl(priv, 1); | |
1128 | usbhs_sys_function_ctrl(priv, 1); | |
1129 | usbhs_sys_usb_ctrl(priv, 1); | |
1130 | ||
1131 | /* | |
1132 | * enable irq callback | |
1133 | */ | |
1134 | mod->irq_dev_state = usbhsg_irq_dev_state; | |
1135 | mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage; | |
1136 | mod->irq_empty = usbhsg_irq_empty; | |
1137 | mod->irq_ready = usbhsg_irq_ready; | |
1138 | mod->irq_bempsts = 0; | |
1139 | mod->irq_brdysts = 0; | |
1140 | usbhs_irq_callback_update(priv, mod); | |
1141 | ||
1142 | usbhsg_try_start_unlock: | |
cb96632c | 1143 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
1144 | /******************** spin unlock ********************/ |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status) | |
1150 | { | |
1151 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
1152 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
1153 | struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv); | |
1154 | struct device *dev = usbhs_priv_to_dev(priv); | |
cb96632c | 1155 | spinlock_t *lock; |
2f98382d KM |
1156 | unsigned long flags; |
1157 | ||
1158 | /******************** spin lock ********************/ | |
cb96632c | 1159 | lock = usbhsg_trylock(gpriv, &flags); |
2f98382d KM |
1160 | |
1161 | /* | |
1162 | * disable interrupt and systems if 1st try | |
1163 | */ | |
1164 | usbhsg_status_clr(gpriv, status); | |
1165 | if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) && | |
1166 | !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)) | |
1167 | goto usbhsg_try_stop_unlock; | |
1168 | ||
1169 | /* disable all irq */ | |
1170 | mod->irq_dev_state = NULL; | |
1171 | mod->irq_ctrl_stage = NULL; | |
1172 | mod->irq_empty = NULL; | |
1173 | mod->irq_ready = NULL; | |
1174 | mod->irq_bempsts = 0; | |
1175 | mod->irq_brdysts = 0; | |
1176 | usbhs_irq_callback_update(priv, mod); | |
1177 | ||
1178 | usbhsg_dcp_disable(dcp); | |
1179 | ||
1180 | gpriv->gadget.speed = USB_SPEED_UNKNOWN; | |
1181 | ||
1182 | /* disable sys */ | |
1183 | usbhs_sys_hispeed_ctrl(priv, 0); | |
1184 | usbhs_sys_function_ctrl(priv, 0); | |
1185 | usbhs_sys_usb_ctrl(priv, 0); | |
1186 | ||
cb96632c | 1187 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
1188 | /******************** spin unlock ********************/ |
1189 | ||
1190 | if (gpriv->driver && | |
1191 | gpriv->driver->disconnect) | |
1192 | gpriv->driver->disconnect(&gpriv->gadget); | |
1193 | ||
1194 | dev_dbg(dev, "stop gadget\n"); | |
1195 | ||
1196 | return 0; | |
1197 | ||
1198 | usbhsg_try_stop_unlock: | |
cb96632c | 1199 | usbhsg_unlock(lock, &flags); |
2f98382d KM |
1200 | |
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * | |
1206 | * linux usb function | |
1207 | * | |
1208 | */ | |
1209 | struct usbhsg_gpriv *the_controller; | |
1210 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver, | |
1211 | int (*bind)(struct usb_gadget *)) | |
1212 | { | |
1213 | struct usbhsg_gpriv *gpriv = the_controller; | |
1214 | struct usbhs_priv *priv; | |
1215 | struct device *dev; | |
1216 | int ret; | |
1217 | ||
1218 | if (!bind || | |
1219 | !driver || | |
1220 | !driver->setup || | |
1221 | driver->speed != USB_SPEED_HIGH) | |
1222 | return -EINVAL; | |
1223 | if (!gpriv) | |
1224 | return -ENODEV; | |
1225 | if (gpriv->driver) | |
1226 | return -EBUSY; | |
1227 | ||
1228 | dev = usbhsg_gpriv_to_dev(gpriv); | |
1229 | priv = usbhsg_gpriv_to_priv(gpriv); | |
1230 | ||
1231 | /* first hook up the driver ... */ | |
1232 | gpriv->driver = driver; | |
1233 | gpriv->gadget.dev.driver = &driver->driver; | |
1234 | ||
1235 | ret = device_add(&gpriv->gadget.dev); | |
1236 | if (ret) { | |
1237 | dev_err(dev, "device_add error %d\n", ret); | |
1238 | goto add_fail; | |
1239 | } | |
1240 | ||
1241 | ret = bind(&gpriv->gadget); | |
1242 | if (ret) { | |
1243 | dev_err(dev, "bind to driver %s error %d\n", | |
1244 | driver->driver.name, ret); | |
1245 | goto bind_fail; | |
1246 | } | |
1247 | ||
1248 | dev_dbg(dev, "bind %s\n", driver->driver.name); | |
1249 | ||
1250 | return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD); | |
1251 | ||
1252 | bind_fail: | |
1253 | device_del(&gpriv->gadget.dev); | |
1254 | add_fail: | |
1255 | gpriv->driver = NULL; | |
1256 | gpriv->gadget.dev.driver = NULL; | |
1257 | ||
1258 | return ret; | |
1259 | } | |
1260 | EXPORT_SYMBOL(usb_gadget_probe_driver); | |
1261 | ||
1262 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1263 | { | |
1264 | struct usbhsg_gpriv *gpriv = the_controller; | |
1265 | struct usbhs_priv *priv; | |
1266 | struct device *dev = usbhsg_gpriv_to_dev(gpriv); | |
1267 | ||
1268 | if (!gpriv) | |
1269 | return -ENODEV; | |
1270 | ||
1271 | if (!driver || | |
1272 | !driver->unbind || | |
1273 | driver != gpriv->driver) | |
1274 | return -EINVAL; | |
1275 | ||
1276 | dev = usbhsg_gpriv_to_dev(gpriv); | |
1277 | priv = usbhsg_gpriv_to_priv(gpriv); | |
1278 | ||
1279 | usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD); | |
1280 | device_del(&gpriv->gadget.dev); | |
1281 | gpriv->driver = NULL; | |
1282 | ||
1283 | if (driver->disconnect) | |
1284 | driver->disconnect(&gpriv->gadget); | |
1285 | ||
1286 | driver->unbind(&gpriv->gadget); | |
1287 | dev_dbg(dev, "unbind %s\n", driver->driver.name); | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
1292 | ||
1293 | /* | |
1294 | * usb gadget ops | |
1295 | */ | |
1296 | static int usbhsg_get_frame(struct usb_gadget *gadget) | |
1297 | { | |
1298 | struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget); | |
1299 | struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); | |
1300 | ||
1301 | return usbhs_frame_get_num(priv); | |
1302 | } | |
1303 | ||
1304 | static struct usb_gadget_ops usbhsg_gadget_ops = { | |
1305 | .get_frame = usbhsg_get_frame, | |
1306 | }; | |
1307 | ||
1308 | static int usbhsg_start(struct usbhs_priv *priv) | |
1309 | { | |
1310 | return usbhsg_try_start(priv, USBHSG_STATUS_STARTED); | |
1311 | } | |
1312 | ||
1313 | static int usbhsg_stop(struct usbhs_priv *priv) | |
1314 | { | |
1315 | return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED); | |
1316 | } | |
1317 | ||
1318 | int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv) | |
1319 | { | |
1320 | struct usbhsg_gpriv *gpriv; | |
1321 | struct usbhsg_uep *uep; | |
1322 | struct device *dev = usbhs_priv_to_dev(priv); | |
1323 | int pipe_size = usbhs_get_dparam(priv, pipe_size); | |
1324 | int i; | |
1325 | ||
1326 | gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL); | |
1327 | if (!gpriv) { | |
1328 | dev_err(dev, "Could not allocate gadget priv\n"); | |
1329 | return -ENOMEM; | |
1330 | } | |
1331 | ||
1332 | uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL); | |
1333 | if (!uep) { | |
1334 | dev_err(dev, "Could not allocate ep\n"); | |
1335 | goto usbhs_mod_gadget_probe_err_gpriv; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * CAUTION | |
1340 | * | |
1341 | * There is no guarantee that it is possible to access usb module here. | |
1342 | * Don't accesses to it. | |
1343 | * The accesse will be enable after "usbhsg_start" | |
1344 | */ | |
1345 | ||
1346 | /* | |
1347 | * register itself | |
1348 | */ | |
1349 | usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET); | |
1350 | ||
1351 | /* init gpriv */ | |
1352 | gpriv->mod.name = "gadget"; | |
1353 | gpriv->mod.start = usbhsg_start; | |
1354 | gpriv->mod.stop = usbhsg_stop; | |
1355 | gpriv->uep = uep; | |
1356 | gpriv->uep_size = pipe_size; | |
1357 | usbhsg_status_init(gpriv); | |
1358 | ||
1359 | /* | |
1360 | * init gadget | |
1361 | */ | |
1362 | device_initialize(&gpriv->gadget.dev); | |
1363 | dev_set_name(&gpriv->gadget.dev, "gadget"); | |
1364 | gpriv->gadget.dev.parent = dev; | |
1365 | gpriv->gadget.name = "renesas_usbhs_udc"; | |
1366 | gpriv->gadget.ops = &usbhsg_gadget_ops; | |
1367 | gpriv->gadget.is_dualspeed = 1; | |
1368 | ||
1369 | INIT_LIST_HEAD(&gpriv->gadget.ep_list); | |
1370 | ||
1371 | /* | |
1372 | * init usb_ep | |
1373 | */ | |
1374 | usbhsg_for_each_uep_with_dcp(uep, gpriv, i) { | |
1375 | uep->gpriv = gpriv; | |
1376 | snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i); | |
1377 | ||
1378 | uep->ep.name = uep->ep_name; | |
1379 | uep->ep.ops = &usbhsg_ep_ops; | |
1380 | INIT_LIST_HEAD(&uep->ep.ep_list); | |
2f98382d KM |
1381 | |
1382 | /* init DCP */ | |
1383 | if (usbhsg_is_dcp(uep)) { | |
1384 | gpriv->gadget.ep0 = &uep->ep; | |
1385 | uep->ep.maxpacket = 64; | |
1386 | } | |
1387 | /* init normal pipe */ | |
1388 | else { | |
1389 | uep->ep.maxpacket = 512; | |
1390 | list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list); | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | the_controller = gpriv; | |
1395 | ||
1396 | dev_info(dev, "gadget probed\n"); | |
1397 | ||
1398 | return 0; | |
1399 | ||
1400 | usbhs_mod_gadget_probe_err_gpriv: | |
1401 | kfree(gpriv); | |
1402 | ||
1403 | return -ENOMEM; | |
1404 | } | |
1405 | ||
1406 | void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv) | |
1407 | { | |
1408 | struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv); | |
1409 | ||
1410 | kfree(gpriv); | |
1411 | } |