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/io.h> |
9 | #include <linux/list.h> |
10 | #include <linux/module.h> |
11 | #include <linux/platform_device.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/usb.h> |
14 | #include <linux/usb/hcd.h> |
15 | #include "common.h" |
16 | |
17 | /* |
18 | *** HARDWARE LIMITATION *** |
19 | * |
20 | * 1) renesas_usbhs has a limited number of controllable devices. |
21 | * it can control only 9 devices in generally. |
22 | * see DEVADDn / DCPMAXP / PIPEMAXP. |
23 | * |
24 | * 2) renesas_usbhs pipe number is limited. |
25 | * the pipe will be re-used for each devices. |
26 | * so, software should control DATA0/1 sequence of each devices. |
27 | */ |
28 | |
29 | |
30 | /* |
31 | * image of mod_host |
32 | * |
33 | * +--------+ |
34 | * | udev 0 | --> it is used when set address |
35 | * +--------+ |
36 | * |
37 | * +--------+ pipes are reused for each uep. |
38 | * | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when |
39 | * +--------+ | | other device requested |
40 | * +- [uep 1 (bulk)] --|---+ +--------------+ |
41 | * | +--------------> | pipe0 (dcp) | |
42 | * +- [uep 2 (bulk)] -@ | +--------------+ |
43 | * | | pipe1 (isoc) | |
44 | * +--------+ | +--------------+ |
45 | * | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) | |
46 | * +--------+ | +--------------+ |
47 | * +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) | |
48 | * | | +--------------+ |
49 | * +--------+ +-----|------> | pipe4 (int) | |
50 | * | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+ |
51 | * +--------+ | | | .... | |
52 | * +- [uep 1 (bulk)] -@ | | .... | |
53 | * | | |
54 | * +- [uep 2 (bulk)]-----------+ |
55 | * |
56 | * @ : uep requested free pipe, but all have been used. |
57 | * now it is waiting for free pipe |
58 | */ |
59 | |
60 | |
61 | /* |
62 | * struct |
63 | */ |
64 | struct usbhsh_request { |
65 | struct urb *urb; |
66 | struct usbhs_pkt pkt; |
67 | }; |
68 | |
69 | struct usbhsh_device { |
70 | struct usb_device *usbv; |
71 | struct list_head ep_list_head; /* list of usbhsh_ep */ |
72 | }; |
73 | |
74 | struct usbhsh_ep { |
75 | struct usbhs_pipe *pipe; /* attached pipe */ |
76 | struct usbhsh_device *udev; /* attached udev */ |
77 | struct usb_host_endpoint *ep; |
78 | struct list_head ep_list; /* list to usbhsh_device */ |
79 | unsigned int counter; /* pipe attach counter */ |
80 | }; |
81 | |
82 | #define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */ |
83 | #define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */ |
84 | struct usbhsh_hpriv { |
85 | struct usbhs_mod mod; |
86 | struct usbhs_pipe *dcp; |
87 | |
88 | struct usbhsh_device udev[USBHSH_DEVICE_MAX]; |
89 | |
90 | u32 port_stat; /* USB_PORT_STAT_xxx */ |
91 | |
92 | struct completion setup_ack_done; |
93 | }; |
94 | |
95 | |
96 | static const char usbhsh_hcd_name[] = "renesas_usbhs host" ; |
97 | |
98 | /* |
99 | * macro |
100 | */ |
101 | #define usbhsh_priv_to_hpriv(priv) \ |
102 | container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod) |
103 | |
104 | #define __usbhsh_for_each_udev(start, pos, h, i) \ |
105 | for ((i) = start; \ |
106 | ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i)); \ |
107 | (i)++) |
108 | |
109 | #define usbhsh_for_each_udev(pos, hpriv, i) \ |
110 | __usbhsh_for_each_udev(1, pos, hpriv, i) |
111 | |
112 | #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \ |
113 | __usbhsh_for_each_udev(0, pos, hpriv, i) |
114 | |
115 | #define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv) |
116 | #define usbhsh_hcd_to_dev(h) ((h)->self.controller) |
117 | |
118 | #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv) |
119 | #define usbhsh_hpriv_to_dcp(h) ((h)->dcp) |
120 | #define usbhsh_hpriv_to_hcd(h) \ |
121 | container_of((void *)h, struct usb_hcd, hcd_priv) |
122 | |
123 | #define usbhsh_ep_to_uep(u) ((u)->hcpriv) |
124 | #define usbhsh_uep_to_pipe(u) ((u)->pipe) |
125 | #define usbhsh_uep_to_udev(u) ((u)->udev) |
126 | #define usbhsh_uep_to_ep(u) ((u)->ep) |
127 | |
128 | #define usbhsh_urb_to_ureq(u) ((u)->hcpriv) |
129 | #define usbhsh_urb_to_usbv(u) ((u)->dev) |
130 | |
131 | #define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev) |
132 | |
133 | #define usbhsh_udev_to_usbv(h) ((h)->usbv) |
134 | #define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h) |
135 | |
136 | #define usbhsh_pipe_to_uep(p) ((p)->mod_private) |
137 | |
138 | #define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent)) |
139 | #define usbhsh_device_hubport(d) ((d)->usbv->portnum) |
140 | #define usbhsh_device_number(h, d) ((int)((d) - (h)->udev)) |
141 | #define usbhsh_device_nth(h, d) ((h)->udev + d) |
142 | #define usbhsh_device0(h) usbhsh_device_nth(h, 0) |
143 | |
144 | #define usbhsh_port_stat_init(h) ((h)->port_stat = 0) |
145 | #define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s)) |
146 | #define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s)) |
147 | #define usbhsh_port_stat_get(h) ((h)->port_stat) |
148 | |
149 | #define usbhsh_pkt_to_ureq(p) \ |
150 | container_of((void *)p, struct usbhsh_request, pkt) |
151 | |
152 | /* |
153 | * req alloc/free |
154 | */ |
155 | static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv, |
156 | struct urb *urb, |
157 | gfp_t mem_flags) |
158 | { |
159 | struct usbhsh_request *ureq; |
160 | |
161 | ureq = kzalloc(size: sizeof(struct usbhsh_request), flags: mem_flags); |
162 | if (!ureq) |
163 | return NULL; |
164 | |
165 | usbhs_pkt_init(pkt: &ureq->pkt); |
166 | ureq->urb = urb; |
167 | usbhsh_urb_to_ureq(urb) = ureq; |
168 | |
169 | return ureq; |
170 | } |
171 | |
172 | static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, |
173 | struct usbhsh_request *ureq) |
174 | { |
175 | usbhsh_urb_to_ureq(ureq->urb) = NULL; |
176 | ureq->urb = NULL; |
177 | |
178 | kfree(objp: ureq); |
179 | } |
180 | |
181 | /* |
182 | * status |
183 | */ |
184 | static int usbhsh_is_running(struct usbhsh_hpriv *hpriv) |
185 | { |
186 | /* |
187 | * we can decide some device is attached or not |
188 | * by checking mod.irq_attch |
189 | * see |
190 | * usbhsh_irq_attch() |
191 | * usbhsh_irq_dtch() |
192 | */ |
193 | return (hpriv->mod.irq_attch == NULL); |
194 | } |
195 | |
196 | /* |
197 | * pipe control |
198 | */ |
199 | static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv, |
200 | struct urb *urb, |
201 | struct usbhs_pkt *pkt) |
202 | { |
203 | int len = urb->actual_length; |
204 | int maxp = usb_endpoint_maxp(epd: &urb->ep->desc); |
205 | int t = 0; |
206 | |
207 | /* DCP is out of sequence control */ |
208 | if (usb_pipecontrol(urb->pipe)) |
209 | return; |
210 | |
211 | /* |
212 | * renesas_usbhs pipe has a limitation in a number. |
213 | * So, driver should re-use the limited pipe for each device/endpoint. |
214 | * DATA0/1 sequence should be saved for it. |
215 | * see [image of mod_host] |
216 | * [HARDWARE LIMITATION] |
217 | */ |
218 | |
219 | /* |
220 | * next sequence depends on actual_length |
221 | * |
222 | * ex) actual_length = 1147, maxp = 512 |
223 | * data0 : 512 |
224 | * data1 : 512 |
225 | * data0 : 123 |
226 | * data1 is the next sequence |
227 | */ |
228 | t = len / maxp; |
229 | if (len % maxp) |
230 | t++; |
231 | if (pkt->zero) |
232 | t++; |
233 | t %= 2; |
234 | |
235 | if (t) |
236 | usb_dotoggle(urb->dev, |
237 | usb_pipeendpoint(urb->pipe), |
238 | usb_pipeout(urb->pipe)); |
239 | } |
240 | |
241 | static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, |
242 | struct urb *urb); |
243 | |
244 | static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv, |
245 | struct urb *urb) |
246 | { |
247 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
248 | struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); |
249 | struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); |
250 | struct usbhs_pipe *pipe; |
251 | struct usb_endpoint_descriptor *desc = &urb->ep->desc; |
252 | struct device *dev = usbhs_priv_to_dev(priv); |
253 | unsigned long flags; |
254 | int dir_in_req = !!usb_pipein(urb->pipe); |
255 | int is_dcp = usb_endpoint_xfer_control(epd: desc); |
256 | int i, dir_in; |
257 | int ret = -EBUSY; |
258 | |
259 | /******************** spin lock ********************/ |
260 | usbhs_lock(priv, flags); |
261 | |
262 | /* |
263 | * if uep has been attached to pipe, |
264 | * reuse it |
265 | */ |
266 | if (usbhsh_uep_to_pipe(uep)) { |
267 | ret = 0; |
268 | goto usbhsh_pipe_attach_done; |
269 | } |
270 | |
271 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
272 | |
273 | /* check pipe type */ |
274 | if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc))) |
275 | continue; |
276 | |
277 | /* check pipe direction if normal pipe */ |
278 | if (!is_dcp) { |
279 | dir_in = !!usbhs_pipe_is_dir_in(pipe); |
280 | if (0 != (dir_in - dir_in_req)) |
281 | continue; |
282 | } |
283 | |
284 | /* check pipe is free */ |
285 | if (usbhsh_pipe_to_uep(pipe)) |
286 | continue; |
287 | |
288 | /* |
289 | * attach pipe to uep |
290 | * |
291 | * usbhs_pipe_config_update() should be called after |
292 | * usbhs_set_device_config() |
293 | * see |
294 | * DCPMAXP/PIPEMAXP |
295 | */ |
296 | usbhsh_uep_to_pipe(uep) = pipe; |
297 | usbhsh_pipe_to_uep(pipe) = uep; |
298 | |
299 | usbhs_pipe_config_update(pipe, |
300 | usbhsh_device_number(hpriv, udev), |
301 | epnum: usb_endpoint_num(epd: desc), |
302 | maxp: usb_endpoint_maxp(epd: desc)); |
303 | |
304 | dev_dbg(dev, "%s [%d-%d(%s:%s)]\n" , __func__, |
305 | usbhsh_device_number(hpriv, udev), |
306 | usb_endpoint_num(desc), |
307 | usbhs_pipe_name(pipe), |
308 | dir_in_req ? "in" : "out" ); |
309 | |
310 | ret = 0; |
311 | break; |
312 | } |
313 | |
314 | usbhsh_pipe_attach_done: |
315 | if (0 == ret) |
316 | uep->counter++; |
317 | |
318 | usbhs_unlock(priv, flags); |
319 | /******************** spin unlock ******************/ |
320 | |
321 | return ret; |
322 | } |
323 | |
324 | static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv, |
325 | struct usbhsh_ep *uep) |
326 | { |
327 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
328 | struct usbhs_pipe *pipe; |
329 | struct device *dev = usbhs_priv_to_dev(priv); |
330 | unsigned long flags; |
331 | |
332 | if (unlikely(!uep)) { |
333 | dev_err(dev, "no uep\n" ); |
334 | return; |
335 | } |
336 | |
337 | /******************** spin lock ********************/ |
338 | usbhs_lock(priv, flags); |
339 | |
340 | pipe = usbhsh_uep_to_pipe(uep); |
341 | |
342 | if (unlikely(!pipe)) { |
343 | dev_err(dev, "uep doesn't have pipe\n" ); |
344 | } else if (1 == uep->counter--) { /* last user */ |
345 | struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep); |
346 | struct usbhsh_device *udev = usbhsh_uep_to_udev(uep); |
347 | |
348 | /* detach pipe from uep */ |
349 | usbhsh_uep_to_pipe(uep) = NULL; |
350 | usbhsh_pipe_to_uep(pipe) = NULL; |
351 | |
352 | dev_dbg(dev, "%s [%d-%d(%s)]\n" , __func__, |
353 | usbhsh_device_number(hpriv, udev), |
354 | usb_endpoint_num(&ep->desc), |
355 | usbhs_pipe_name(pipe)); |
356 | } |
357 | |
358 | usbhs_unlock(priv, flags); |
359 | /******************** spin unlock ******************/ |
360 | } |
361 | |
362 | /* |
363 | * endpoint control |
364 | */ |
365 | static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv, |
366 | struct urb *urb, |
367 | gfp_t mem_flags) |
368 | { |
369 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
370 | struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); |
371 | struct usb_host_endpoint *ep = urb->ep; |
372 | struct usbhsh_ep *uep; |
373 | struct device *dev = usbhs_priv_to_dev(priv); |
374 | struct usb_endpoint_descriptor *desc = &ep->desc; |
375 | unsigned long flags; |
376 | |
377 | uep = kzalloc(size: sizeof(struct usbhsh_ep), flags: mem_flags); |
378 | if (!uep) |
379 | return -ENOMEM; |
380 | |
381 | /******************** spin lock ********************/ |
382 | usbhs_lock(priv, flags); |
383 | |
384 | /* |
385 | * init endpoint |
386 | */ |
387 | uep->counter = 0; |
388 | INIT_LIST_HEAD(list: &uep->ep_list); |
389 | list_add_tail(new: &uep->ep_list, head: &udev->ep_list_head); |
390 | |
391 | usbhsh_uep_to_udev(uep) = udev; |
392 | usbhsh_uep_to_ep(uep) = ep; |
393 | usbhsh_ep_to_uep(ep) = uep; |
394 | |
395 | usbhs_unlock(priv, flags); |
396 | /******************** spin unlock ******************/ |
397 | |
398 | dev_dbg(dev, "%s [%d-%d]\n" , __func__, |
399 | usbhsh_device_number(hpriv, udev), |
400 | usb_endpoint_num(desc)); |
401 | |
402 | return 0; |
403 | } |
404 | |
405 | static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv, |
406 | struct usb_host_endpoint *ep) |
407 | { |
408 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
409 | struct device *dev = usbhs_priv_to_dev(priv); |
410 | struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); |
411 | unsigned long flags; |
412 | |
413 | if (!uep) |
414 | return; |
415 | |
416 | dev_dbg(dev, "%s [%d-%d]\n" , __func__, |
417 | usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)), |
418 | usb_endpoint_num(&ep->desc)); |
419 | |
420 | if (usbhsh_uep_to_pipe(uep)) |
421 | usbhsh_pipe_detach(hpriv, uep); |
422 | |
423 | /******************** spin lock ********************/ |
424 | usbhs_lock(priv, flags); |
425 | |
426 | /* remove this endpoint from udev */ |
427 | list_del_init(entry: &uep->ep_list); |
428 | |
429 | usbhsh_uep_to_udev(uep) = NULL; |
430 | usbhsh_uep_to_ep(uep) = NULL; |
431 | usbhsh_ep_to_uep(ep) = NULL; |
432 | |
433 | usbhs_unlock(priv, flags); |
434 | /******************** spin unlock ******************/ |
435 | |
436 | kfree(objp: uep); |
437 | } |
438 | |
439 | static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv, |
440 | struct usbhsh_device *udev) |
441 | { |
442 | struct usbhsh_ep *uep, *next; |
443 | |
444 | list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list) |
445 | usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep)); |
446 | } |
447 | |
448 | /* |
449 | * device control |
450 | */ |
451 | static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd, |
452 | struct usbhsh_device *udev) |
453 | { |
454 | struct usb_device *usbv = usbhsh_udev_to_usbv(udev); |
455 | |
456 | return hcd->self.root_hub == usbv->parent; |
457 | } |
458 | |
459 | static int usbhsh_device_has_endpoint(struct usbhsh_device *udev) |
460 | { |
461 | return !list_empty(head: &udev->ep_list_head); |
462 | } |
463 | |
464 | static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, |
465 | struct urb *urb) |
466 | { |
467 | struct usb_device *usbv = usbhsh_urb_to_usbv(urb); |
468 | struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); |
469 | |
470 | /* usbhsh_device_attach() is still not called */ |
471 | if (!udev) |
472 | return NULL; |
473 | |
474 | /* if it is device0, return it */ |
475 | if (0 == usb_pipedevice(urb->pipe)) |
476 | return usbhsh_device0(hpriv); |
477 | |
478 | /* return attached device */ |
479 | return udev; |
480 | } |
481 | |
482 | static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv, |
483 | struct urb *urb) |
484 | { |
485 | struct usbhsh_device *udev = NULL; |
486 | struct usbhsh_device *udev0 = usbhsh_device0(hpriv); |
487 | struct usbhsh_device *pos; |
488 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
489 | struct device *dev = usbhsh_hcd_to_dev(hcd); |
490 | struct usb_device *usbv = usbhsh_urb_to_usbv(urb); |
491 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
492 | unsigned long flags; |
493 | u16 upphub, hubport; |
494 | int i; |
495 | |
496 | /* |
497 | * This function should be called only while urb is pointing to device0. |
498 | * It will attach unused usbhsh_device to urb (usbv), |
499 | * and initialize device0. |
500 | * You can use usbhsh_device_get() to get "current" udev, |
501 | * and usbhsh_usbv_to_udev() is for "attached" udev. |
502 | */ |
503 | if (0 != usb_pipedevice(urb->pipe)) { |
504 | dev_err(dev, "%s fail: urb isn't pointing device0\n" , __func__); |
505 | return NULL; |
506 | } |
507 | |
508 | /******************** spin lock ********************/ |
509 | usbhs_lock(priv, flags); |
510 | |
511 | /* |
512 | * find unused device |
513 | */ |
514 | usbhsh_for_each_udev(pos, hpriv, i) { |
515 | if (usbhsh_udev_is_used(pos)) |
516 | continue; |
517 | udev = pos; |
518 | break; |
519 | } |
520 | |
521 | if (udev) { |
522 | /* |
523 | * usbhsh_usbv_to_udev() |
524 | * usbhsh_udev_to_usbv() |
525 | * will be enable |
526 | */ |
527 | dev_set_drvdata(dev: &usbv->dev, data: udev); |
528 | udev->usbv = usbv; |
529 | } |
530 | |
531 | usbhs_unlock(priv, flags); |
532 | /******************** spin unlock ******************/ |
533 | |
534 | if (!udev) { |
535 | dev_err(dev, "no free usbhsh_device\n" ); |
536 | return NULL; |
537 | } |
538 | |
539 | if (usbhsh_device_has_endpoint(udev)) { |
540 | dev_warn(dev, "udev have old endpoint\n" ); |
541 | usbhsh_endpoint_detach_all(hpriv, udev); |
542 | } |
543 | |
544 | if (usbhsh_device_has_endpoint(udev: udev0)) { |
545 | dev_warn(dev, "udev0 have old endpoint\n" ); |
546 | usbhsh_endpoint_detach_all(hpriv, udev: udev0); |
547 | } |
548 | |
549 | /* uep will be attached */ |
550 | INIT_LIST_HEAD(list: &udev0->ep_list_head); |
551 | INIT_LIST_HEAD(list: &udev->ep_list_head); |
552 | |
553 | /* |
554 | * set device0 config |
555 | */ |
556 | usbhs_set_device_config(priv, |
557 | devnum: 0, upphub: 0, hubport: 0, speed: usbv->speed); |
558 | |
559 | /* |
560 | * set new device config |
561 | */ |
562 | upphub = 0; |
563 | hubport = 0; |
564 | if (!usbhsh_connected_to_rhdev(hcd, udev)) { |
565 | /* if udev is not connected to rhdev, it means parent is Hub */ |
566 | struct usbhsh_device *parent = usbhsh_device_parent(udev); |
567 | |
568 | upphub = usbhsh_device_number(hpriv, parent); |
569 | hubport = usbhsh_device_hubport(udev); |
570 | |
571 | dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n" , __func__, |
572 | upphub, hubport, parent); |
573 | } |
574 | |
575 | usbhs_set_device_config(priv, |
576 | usbhsh_device_number(hpriv, udev), |
577 | upphub, hubport, speed: usbv->speed); |
578 | |
579 | dev_dbg(dev, "%s [%d](%p)\n" , __func__, |
580 | usbhsh_device_number(hpriv, udev), udev); |
581 | |
582 | return udev; |
583 | } |
584 | |
585 | static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv, |
586 | struct usbhsh_device *udev) |
587 | { |
588 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
589 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
590 | struct device *dev = usbhsh_hcd_to_dev(hcd); |
591 | struct usb_device *usbv = usbhsh_udev_to_usbv(udev); |
592 | unsigned long flags; |
593 | |
594 | dev_dbg(dev, "%s [%d](%p)\n" , __func__, |
595 | usbhsh_device_number(hpriv, udev), udev); |
596 | |
597 | if (usbhsh_device_has_endpoint(udev)) { |
598 | dev_warn(dev, "udev still have endpoint\n" ); |
599 | usbhsh_endpoint_detach_all(hpriv, udev); |
600 | } |
601 | |
602 | /* |
603 | * There is nothing to do if it is device0. |
604 | * see |
605 | * usbhsh_device_attach() |
606 | * usbhsh_device_get() |
607 | */ |
608 | if (0 == usbhsh_device_number(hpriv, udev)) |
609 | return; |
610 | |
611 | /******************** spin lock ********************/ |
612 | usbhs_lock(priv, flags); |
613 | |
614 | /* |
615 | * usbhsh_usbv_to_udev() |
616 | * usbhsh_udev_to_usbv() |
617 | * will be disable |
618 | */ |
619 | dev_set_drvdata(dev: &usbv->dev, NULL); |
620 | udev->usbv = NULL; |
621 | |
622 | usbhs_unlock(priv, flags); |
623 | /******************** spin unlock ******************/ |
624 | } |
625 | |
626 | /* |
627 | * queue push/pop |
628 | */ |
629 | static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) |
630 | { |
631 | struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); |
632 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
633 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
634 | struct urb *urb = ureq->urb; |
635 | struct device *dev = usbhs_priv_to_dev(priv); |
636 | int status = 0; |
637 | |
638 | dev_dbg(dev, "%s\n" , __func__); |
639 | |
640 | if (!urb) { |
641 | dev_warn(dev, "pkt doesn't have urb\n" ); |
642 | return; |
643 | } |
644 | |
645 | if (!usbhsh_is_running(hpriv)) |
646 | status = -ESHUTDOWN; |
647 | |
648 | urb->actual_length = pkt->actual; |
649 | |
650 | usbhsh_endpoint_sequence_save(hpriv, urb, pkt); |
651 | usbhsh_ureq_free(hpriv, ureq); |
652 | |
653 | usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep)); |
654 | |
655 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
656 | usb_hcd_giveback_urb(hcd, urb, status); |
657 | } |
658 | |
659 | static int usbhsh_queue_push(struct usb_hcd *hcd, |
660 | struct urb *urb, |
661 | gfp_t mem_flags) |
662 | { |
663 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
664 | struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); |
665 | struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); |
666 | struct device *dev = usbhsh_hcd_to_dev(hcd); |
667 | struct usbhsh_request *ureq; |
668 | void *buf; |
669 | int len, sequence; |
670 | |
671 | if (usb_pipeisoc(urb->pipe)) { |
672 | dev_err(dev, "pipe iso is not supported now\n" ); |
673 | return -EIO; |
674 | } |
675 | |
676 | /* this ureq will be freed on usbhsh_queue_done() */ |
677 | ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); |
678 | if (unlikely(!ureq)) { |
679 | dev_err(dev, "ureq alloc fail\n" ); |
680 | return -ENOMEM; |
681 | } |
682 | |
683 | if (usb_pipein(urb->pipe)) |
684 | pipe->handler = &usbhs_fifo_dma_pop_handler; |
685 | else |
686 | pipe->handler = &usbhs_fifo_dma_push_handler; |
687 | |
688 | buf = (void *)(urb->transfer_buffer + urb->actual_length); |
689 | len = urb->transfer_buffer_length - urb->actual_length; |
690 | |
691 | sequence = usb_gettoggle(urb->dev, |
692 | usb_pipeendpoint(urb->pipe), |
693 | usb_pipeout(urb->pipe)); |
694 | |
695 | dev_dbg(dev, "%s\n" , __func__); |
696 | usbhs_pkt_push(pipe, pkt: &ureq->pkt, done: usbhsh_queue_done, |
697 | buf, len, zero: (urb->transfer_flags & URB_ZERO_PACKET), |
698 | sequence); |
699 | |
700 | usbhs_pkt_start(pipe); |
701 | |
702 | return 0; |
703 | } |
704 | |
705 | static void usbhsh_queue_force_pop(struct usbhs_priv *priv, |
706 | struct usbhs_pipe *pipe) |
707 | { |
708 | struct usbhs_pkt *pkt; |
709 | |
710 | while (1) { |
711 | pkt = usbhs_pkt_pop(pipe, NULL); |
712 | if (!pkt) |
713 | break; |
714 | |
715 | /* |
716 | * if all packet are gone, usbhsh_endpoint_disable() |
717 | * will be called. |
718 | * then, attached device/endpoint/pipe will be detached |
719 | */ |
720 | usbhsh_queue_done(priv, pkt); |
721 | } |
722 | } |
723 | |
724 | static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv) |
725 | { |
726 | struct usbhs_pipe *pos; |
727 | int i; |
728 | |
729 | usbhs_for_each_pipe_with_dcp(pos, priv, i) |
730 | usbhsh_queue_force_pop(priv, pipe: pos); |
731 | } |
732 | |
733 | /* |
734 | * DCP setup stage |
735 | */ |
736 | static int usbhsh_is_request_address(struct urb *urb) |
737 | { |
738 | struct usb_ctrlrequest *req; |
739 | |
740 | req = (struct usb_ctrlrequest *)urb->setup_packet; |
741 | |
742 | if ((DeviceOutRequest == req->bRequestType << 8) && |
743 | (USB_REQ_SET_ADDRESS == req->bRequest)) |
744 | return 1; |
745 | else |
746 | return 0; |
747 | } |
748 | |
749 | static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv, |
750 | struct urb *urb, |
751 | struct usbhs_pipe *pipe) |
752 | { |
753 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
754 | struct usb_ctrlrequest req; |
755 | struct device *dev = usbhs_priv_to_dev(priv); |
756 | |
757 | /* |
758 | * wait setup packet ACK |
759 | * see |
760 | * usbhsh_irq_setup_ack() |
761 | * usbhsh_irq_setup_err() |
762 | */ |
763 | init_completion(x: &hpriv->setup_ack_done); |
764 | |
765 | /* copy original request */ |
766 | memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest)); |
767 | |
768 | /* |
769 | * renesas_usbhs can not use original usb address. |
770 | * see HARDWARE LIMITATION. |
771 | * modify usb address here to use attached device. |
772 | * see usbhsh_device_attach() |
773 | */ |
774 | if (usbhsh_is_request_address(urb)) { |
775 | struct usb_device *usbv = usbhsh_urb_to_usbv(urb); |
776 | struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); |
777 | |
778 | /* udev is a attached device */ |
779 | req.wValue = usbhsh_device_number(hpriv, udev); |
780 | dev_dbg(dev, "create new address - %d\n" , req.wValue); |
781 | } |
782 | |
783 | /* set request */ |
784 | usbhs_usbreq_set_val(priv, req: &req); |
785 | |
786 | /* |
787 | * wait setup packet ACK |
788 | */ |
789 | wait_for_completion(&hpriv->setup_ack_done); |
790 | |
791 | dev_dbg(dev, "%s done\n" , __func__); |
792 | } |
793 | |
794 | /* |
795 | * DCP data stage |
796 | */ |
797 | static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv, |
798 | struct usbhs_pkt *pkt) |
799 | { |
800 | struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); |
801 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
802 | |
803 | /* this ureq was connected to urb when usbhsh_urb_enqueue() */ |
804 | |
805 | usbhsh_ureq_free(hpriv, ureq); |
806 | } |
807 | |
808 | static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv, |
809 | struct urb *urb, |
810 | struct usbhs_pipe *pipe, |
811 | gfp_t mem_flags) |
812 | |
813 | { |
814 | struct usbhsh_request *ureq; |
815 | |
816 | /* this ureq will be freed on usbhsh_data_stage_packet_done() */ |
817 | ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); |
818 | if (unlikely(!ureq)) |
819 | return -ENOMEM; |
820 | |
821 | if (usb_pipein(urb->pipe)) |
822 | pipe->handler = &usbhs_dcp_data_stage_in_handler; |
823 | else |
824 | pipe->handler = &usbhs_dcp_data_stage_out_handler; |
825 | |
826 | usbhs_pkt_push(pipe, pkt: &ureq->pkt, |
827 | done: usbhsh_data_stage_packet_done, |
828 | buf: urb->transfer_buffer, |
829 | len: urb->transfer_buffer_length, |
830 | zero: (urb->transfer_flags & URB_ZERO_PACKET), |
831 | sequence: -1); |
832 | |
833 | return 0; |
834 | } |
835 | |
836 | /* |
837 | * DCP status stage |
838 | */ |
839 | static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv, |
840 | struct urb *urb, |
841 | struct usbhs_pipe *pipe, |
842 | gfp_t mem_flags) |
843 | { |
844 | struct usbhsh_request *ureq; |
845 | |
846 | /* This ureq will be freed on usbhsh_queue_done() */ |
847 | ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); |
848 | if (unlikely(!ureq)) |
849 | return -ENOMEM; |
850 | |
851 | if (usb_pipein(urb->pipe)) |
852 | pipe->handler = &usbhs_dcp_status_stage_in_handler; |
853 | else |
854 | pipe->handler = &usbhs_dcp_status_stage_out_handler; |
855 | |
856 | usbhs_pkt_push(pipe, pkt: &ureq->pkt, |
857 | done: usbhsh_queue_done, |
858 | NULL, |
859 | len: urb->transfer_buffer_length, |
860 | zero: 0, sequence: -1); |
861 | |
862 | return 0; |
863 | } |
864 | |
865 | static int usbhsh_dcp_queue_push(struct usb_hcd *hcd, |
866 | struct urb *urb, |
867 | gfp_t mflags) |
868 | { |
869 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
870 | struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); |
871 | struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); |
872 | struct device *dev = usbhsh_hcd_to_dev(hcd); |
873 | int ret; |
874 | |
875 | dev_dbg(dev, "%s\n" , __func__); |
876 | |
877 | /* |
878 | * setup stage |
879 | * |
880 | * usbhsh_send_setup_stage_packet() wait SACK/SIGN |
881 | */ |
882 | usbhsh_setup_stage_packet_push(hpriv, urb, pipe); |
883 | |
884 | /* |
885 | * data stage |
886 | * |
887 | * It is pushed only when urb has buffer. |
888 | */ |
889 | if (urb->transfer_buffer_length) { |
890 | ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mem_flags: mflags); |
891 | if (ret < 0) { |
892 | dev_err(dev, "data stage failed\n" ); |
893 | return ret; |
894 | } |
895 | } |
896 | |
897 | /* |
898 | * status stage |
899 | */ |
900 | ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mem_flags: mflags); |
901 | if (ret < 0) { |
902 | dev_err(dev, "status stage failed\n" ); |
903 | return ret; |
904 | } |
905 | |
906 | /* |
907 | * start pushed packets |
908 | */ |
909 | usbhs_pkt_start(pipe); |
910 | |
911 | return 0; |
912 | } |
913 | |
914 | /* |
915 | * dma map functions |
916 | */ |
917 | static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt, |
918 | int map) |
919 | { |
920 | if (map) { |
921 | struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); |
922 | struct urb *urb = ureq->urb; |
923 | |
924 | /* it can not use scatter/gather */ |
925 | if (urb->num_sgs) |
926 | return -EINVAL; |
927 | |
928 | pkt->dma = urb->transfer_dma; |
929 | if (!pkt->dma) |
930 | return -EINVAL; |
931 | } |
932 | |
933 | return 0; |
934 | } |
935 | |
936 | /* |
937 | * for hc_driver |
938 | */ |
939 | static int usbhsh_host_start(struct usb_hcd *hcd) |
940 | { |
941 | return 0; |
942 | } |
943 | |
944 | static void usbhsh_host_stop(struct usb_hcd *hcd) |
945 | { |
946 | } |
947 | |
948 | static int usbhsh_urb_enqueue(struct usb_hcd *hcd, |
949 | struct urb *urb, |
950 | gfp_t mem_flags) |
951 | { |
952 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
953 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
954 | struct device *dev = usbhs_priv_to_dev(priv); |
955 | struct usb_host_endpoint *ep = urb->ep; |
956 | struct usbhsh_device *new_udev = NULL; |
957 | int is_dir_in = usb_pipein(urb->pipe); |
958 | int ret; |
959 | |
960 | dev_dbg(dev, "%s (%s)\n" , __func__, is_dir_in ? "in" : "out" ); |
961 | |
962 | if (!usbhsh_is_running(hpriv)) { |
963 | ret = -EIO; |
964 | dev_err(dev, "host is not running\n" ); |
965 | goto usbhsh_urb_enqueue_error_not_linked; |
966 | } |
967 | |
968 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
969 | if (ret) { |
970 | dev_err(dev, "urb link failed\n" ); |
971 | goto usbhsh_urb_enqueue_error_not_linked; |
972 | } |
973 | |
974 | /* |
975 | * attach udev if needed |
976 | * see [image of mod_host] |
977 | */ |
978 | if (!usbhsh_device_get(hpriv, urb)) { |
979 | new_udev = usbhsh_device_attach(hpriv, urb); |
980 | if (!new_udev) { |
981 | ret = -EIO; |
982 | dev_err(dev, "device attach failed\n" ); |
983 | goto usbhsh_urb_enqueue_error_not_linked; |
984 | } |
985 | } |
986 | |
987 | /* |
988 | * attach endpoint if needed |
989 | * see [image of mod_host] |
990 | */ |
991 | if (!usbhsh_ep_to_uep(ep)) { |
992 | ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags); |
993 | if (ret < 0) { |
994 | dev_err(dev, "endpoint attach failed\n" ); |
995 | goto usbhsh_urb_enqueue_error_free_device; |
996 | } |
997 | } |
998 | |
999 | /* |
1000 | * attach pipe to endpoint |
1001 | * see [image of mod_host] |
1002 | */ |
1003 | ret = usbhsh_pipe_attach(hpriv, urb); |
1004 | if (ret < 0) { |
1005 | dev_err(dev, "pipe attach failed\n" ); |
1006 | goto usbhsh_urb_enqueue_error_free_endpoint; |
1007 | } |
1008 | |
1009 | /* |
1010 | * push packet |
1011 | */ |
1012 | if (usb_pipecontrol(urb->pipe)) |
1013 | ret = usbhsh_dcp_queue_push(hcd, urb, mflags: mem_flags); |
1014 | else |
1015 | ret = usbhsh_queue_push(hcd, urb, mem_flags); |
1016 | |
1017 | return ret; |
1018 | |
1019 | usbhsh_urb_enqueue_error_free_endpoint: |
1020 | usbhsh_endpoint_detach(hpriv, ep); |
1021 | usbhsh_urb_enqueue_error_free_device: |
1022 | if (new_udev) |
1023 | usbhsh_device_detach(hpriv, udev: new_udev); |
1024 | usbhsh_urb_enqueue_error_not_linked: |
1025 | |
1026 | dev_dbg(dev, "%s error\n" , __func__); |
1027 | |
1028 | return ret; |
1029 | } |
1030 | |
1031 | static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1032 | { |
1033 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
1034 | struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb); |
1035 | |
1036 | if (ureq) { |
1037 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
1038 | struct usbhs_pkt *pkt = &ureq->pkt; |
1039 | |
1040 | usbhs_pkt_pop(pipe: pkt->pipe, pkt); |
1041 | usbhsh_queue_done(priv, pkt); |
1042 | } |
1043 | |
1044 | return 0; |
1045 | } |
1046 | |
1047 | static void usbhsh_endpoint_disable(struct usb_hcd *hcd, |
1048 | struct usb_host_endpoint *ep) |
1049 | { |
1050 | struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); |
1051 | struct usbhsh_device *udev; |
1052 | struct usbhsh_hpriv *hpriv; |
1053 | |
1054 | /* |
1055 | * this function might be called manytimes by same hcd/ep |
1056 | * in-endpoint == out-endpoint if ep == dcp. |
1057 | */ |
1058 | if (!uep) |
1059 | return; |
1060 | |
1061 | udev = usbhsh_uep_to_udev(uep); |
1062 | hpriv = usbhsh_hcd_to_hpriv(hcd); |
1063 | |
1064 | usbhsh_endpoint_detach(hpriv, ep); |
1065 | |
1066 | /* |
1067 | * if there is no endpoint, |
1068 | * free device |
1069 | */ |
1070 | if (!usbhsh_device_has_endpoint(udev)) |
1071 | usbhsh_device_detach(hpriv, udev); |
1072 | } |
1073 | |
1074 | static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf) |
1075 | { |
1076 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
1077 | int roothub_id = 1; /* only 1 root hub */ |
1078 | |
1079 | /* |
1080 | * does port stat was changed ? |
1081 | * check USB_PORT_STAT_C_xxx << 16 |
1082 | */ |
1083 | if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000) |
1084 | *buf = (1 << roothub_id); |
1085 | else |
1086 | *buf = 0; |
1087 | |
1088 | return !!(*buf); |
1089 | } |
1090 | |
1091 | static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv, |
1092 | u16 typeReq, u16 wValue, |
1093 | u16 wIndex, char *buf, u16 wLength) |
1094 | { |
1095 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
1096 | struct device *dev = usbhs_priv_to_dev(priv); |
1097 | |
1098 | switch (wValue) { |
1099 | case C_HUB_OVER_CURRENT: |
1100 | case C_HUB_LOCAL_POWER: |
1101 | dev_dbg(dev, "%s :: C_HUB_xx\n" , __func__); |
1102 | return 0; |
1103 | } |
1104 | |
1105 | return -EPIPE; |
1106 | } |
1107 | |
1108 | static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv, |
1109 | u16 typeReq, u16 wValue, |
1110 | u16 wIndex, char *buf, u16 wLength) |
1111 | { |
1112 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
1113 | struct device *dev = usbhs_priv_to_dev(priv); |
1114 | int enable = (typeReq == SetPortFeature); |
1115 | int speed, i, timeout = 128; |
1116 | int roothub_id = 1; /* only 1 root hub */ |
1117 | |
1118 | /* common error */ |
1119 | if (wIndex > roothub_id || wLength != 0) |
1120 | return -EPIPE; |
1121 | |
1122 | /* check wValue */ |
1123 | switch (wValue) { |
1124 | case USB_PORT_FEAT_POWER: |
1125 | usbhs_vbus_ctrl(priv, enable); |
1126 | dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n" , __func__); |
1127 | break; |
1128 | |
1129 | case USB_PORT_FEAT_ENABLE: |
1130 | case USB_PORT_FEAT_SUSPEND: |
1131 | case USB_PORT_FEAT_C_ENABLE: |
1132 | case USB_PORT_FEAT_C_SUSPEND: |
1133 | case USB_PORT_FEAT_C_CONNECTION: |
1134 | case USB_PORT_FEAT_C_OVER_CURRENT: |
1135 | case USB_PORT_FEAT_C_RESET: |
1136 | dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n" , __func__); |
1137 | break; |
1138 | |
1139 | case USB_PORT_FEAT_RESET: |
1140 | if (!enable) |
1141 | break; |
1142 | |
1143 | usbhsh_port_stat_clear(hpriv, |
1144 | USB_PORT_STAT_HIGH_SPEED | |
1145 | USB_PORT_STAT_LOW_SPEED); |
1146 | |
1147 | usbhsh_queue_force_pop_all(priv); |
1148 | |
1149 | usbhs_bus_send_reset(priv); |
1150 | msleep(msecs: 20); |
1151 | usbhs_bus_send_sof_enable(priv); |
1152 | |
1153 | for (i = 0; i < timeout ; i++) { |
1154 | switch (usbhs_bus_get_speed(priv)) { |
1155 | case USB_SPEED_LOW: |
1156 | speed = USB_PORT_STAT_LOW_SPEED; |
1157 | goto got_usb_bus_speed; |
1158 | case USB_SPEED_HIGH: |
1159 | speed = USB_PORT_STAT_HIGH_SPEED; |
1160 | goto got_usb_bus_speed; |
1161 | case USB_SPEED_FULL: |
1162 | speed = 0; |
1163 | goto got_usb_bus_speed; |
1164 | } |
1165 | |
1166 | msleep(msecs: 20); |
1167 | } |
1168 | return -EPIPE; |
1169 | |
1170 | got_usb_bus_speed: |
1171 | usbhsh_port_stat_set(hpriv, speed); |
1172 | usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE); |
1173 | |
1174 | dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n" , |
1175 | __func__, speed); |
1176 | |
1177 | /* status change is not needed */ |
1178 | return 0; |
1179 | |
1180 | default: |
1181 | return -EPIPE; |
1182 | } |
1183 | |
1184 | /* set/clear status */ |
1185 | if (enable) |
1186 | usbhsh_port_stat_set(hpriv, (1 << wValue)); |
1187 | else |
1188 | usbhsh_port_stat_clear(hpriv, (1 << wValue)); |
1189 | |
1190 | return 0; |
1191 | } |
1192 | |
1193 | static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv, |
1194 | u16 typeReq, u16 wValue, |
1195 | u16 wIndex, char *buf, u16 wLength) |
1196 | { |
1197 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
1198 | struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf; |
1199 | struct device *dev = usbhs_priv_to_dev(priv); |
1200 | int roothub_id = 1; /* only 1 root hub */ |
1201 | |
1202 | switch (typeReq) { |
1203 | case GetHubStatus: |
1204 | dev_dbg(dev, "%s :: GetHubStatus\n" , __func__); |
1205 | |
1206 | *buf = 0x00; |
1207 | break; |
1208 | |
1209 | case GetPortStatus: |
1210 | if (wIndex != roothub_id) |
1211 | return -EPIPE; |
1212 | |
1213 | dev_dbg(dev, "%s :: GetPortStatus\n" , __func__); |
1214 | *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv)); |
1215 | break; |
1216 | |
1217 | case GetHubDescriptor: |
1218 | desc->bDescriptorType = USB_DT_HUB; |
1219 | desc->bHubContrCurrent = 0; |
1220 | desc->bNbrPorts = roothub_id; |
1221 | desc->bDescLength = 9; |
1222 | desc->bPwrOn2PwrGood = 0; |
1223 | desc->wHubCharacteristics = |
1224 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM); |
1225 | desc->u.hs.DeviceRemovable[0] = (roothub_id << 1); |
1226 | desc->u.hs.DeviceRemovable[1] = ~0; |
1227 | dev_dbg(dev, "%s :: GetHubDescriptor\n" , __func__); |
1228 | break; |
1229 | } |
1230 | |
1231 | return 0; |
1232 | } |
1233 | |
1234 | static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
1235 | u16 wIndex, char *buf, u16 wLength) |
1236 | { |
1237 | struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); |
1238 | struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); |
1239 | struct device *dev = usbhs_priv_to_dev(priv); |
1240 | int ret = -EPIPE; |
1241 | |
1242 | switch (typeReq) { |
1243 | |
1244 | /* Hub Feature */ |
1245 | case ClearHubFeature: |
1246 | case SetHubFeature: |
1247 | ret = __usbhsh_hub_hub_feature(hpriv, typeReq, |
1248 | wValue, wIndex, buf, wLength); |
1249 | break; |
1250 | |
1251 | /* Port Feature */ |
1252 | case SetPortFeature: |
1253 | case ClearPortFeature: |
1254 | ret = __usbhsh_hub_port_feature(hpriv, typeReq, |
1255 | wValue, wIndex, buf, wLength); |
1256 | break; |
1257 | |
1258 | /* Get status */ |
1259 | case GetHubStatus: |
1260 | case GetPortStatus: |
1261 | case GetHubDescriptor: |
1262 | ret = __usbhsh_hub_get_status(hpriv, typeReq, |
1263 | wValue, wIndex, buf, wLength); |
1264 | break; |
1265 | } |
1266 | |
1267 | dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n" , |
1268 | typeReq, ret, usbhsh_port_stat_get(hpriv)); |
1269 | |
1270 | return ret; |
1271 | } |
1272 | |
1273 | static int usbhsh_bus_nop(struct usb_hcd *hcd) |
1274 | { |
1275 | /* nothing to do */ |
1276 | return 0; |
1277 | } |
1278 | |
1279 | static const struct hc_driver usbhsh_driver = { |
1280 | .description = usbhsh_hcd_name, |
1281 | .hcd_priv_size = sizeof(struct usbhsh_hpriv), |
1282 | |
1283 | /* |
1284 | * generic hardware linkage |
1285 | */ |
1286 | .flags = HCD_DMA | HCD_USB2, |
1287 | |
1288 | .start = usbhsh_host_start, |
1289 | .stop = usbhsh_host_stop, |
1290 | |
1291 | /* |
1292 | * managing i/o requests and associated device resources |
1293 | */ |
1294 | .urb_enqueue = usbhsh_urb_enqueue, |
1295 | .urb_dequeue = usbhsh_urb_dequeue, |
1296 | .endpoint_disable = usbhsh_endpoint_disable, |
1297 | |
1298 | /* |
1299 | * root hub |
1300 | */ |
1301 | .hub_status_data = usbhsh_hub_status_data, |
1302 | .hub_control = usbhsh_hub_control, |
1303 | .bus_suspend = usbhsh_bus_nop, |
1304 | .bus_resume = usbhsh_bus_nop, |
1305 | }; |
1306 | |
1307 | /* |
1308 | * interrupt functions |
1309 | */ |
1310 | static int usbhsh_irq_attch(struct usbhs_priv *priv, |
1311 | struct usbhs_irq_state *irq_state) |
1312 | { |
1313 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1314 | struct device *dev = usbhs_priv_to_dev(priv); |
1315 | |
1316 | dev_dbg(dev, "device attached\n" ); |
1317 | |
1318 | usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION); |
1319 | usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); |
1320 | |
1321 | /* |
1322 | * attch interrupt might happen infinitely on some device |
1323 | * (on self power USB hub ?) |
1324 | * disable it here. |
1325 | * |
1326 | * usbhsh_is_running() becomes effective |
1327 | * according to this process. |
1328 | * see |
1329 | * usbhsh_is_running() |
1330 | * usbhsh_urb_enqueue() |
1331 | */ |
1332 | hpriv->mod.irq_attch = NULL; |
1333 | usbhs_irq_callback_update(priv, mod: &hpriv->mod); |
1334 | |
1335 | return 0; |
1336 | } |
1337 | |
1338 | static int usbhsh_irq_dtch(struct usbhs_priv *priv, |
1339 | struct usbhs_irq_state *irq_state) |
1340 | { |
1341 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1342 | struct device *dev = usbhs_priv_to_dev(priv); |
1343 | |
1344 | dev_dbg(dev, "device detached\n" ); |
1345 | |
1346 | usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION); |
1347 | usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); |
1348 | |
1349 | /* |
1350 | * enable attch interrupt again |
1351 | * |
1352 | * usbhsh_is_running() becomes invalid |
1353 | * according to this process. |
1354 | * see |
1355 | * usbhsh_is_running() |
1356 | * usbhsh_urb_enqueue() |
1357 | */ |
1358 | hpriv->mod.irq_attch = usbhsh_irq_attch; |
1359 | usbhs_irq_callback_update(priv, mod: &hpriv->mod); |
1360 | |
1361 | /* |
1362 | * usbhsh_queue_force_pop_all() should be called |
1363 | * after usbhsh_is_running() becomes invalid. |
1364 | */ |
1365 | usbhsh_queue_force_pop_all(priv); |
1366 | |
1367 | return 0; |
1368 | } |
1369 | |
1370 | static int usbhsh_irq_setup_ack(struct usbhs_priv *priv, |
1371 | struct usbhs_irq_state *irq_state) |
1372 | { |
1373 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1374 | struct device *dev = usbhs_priv_to_dev(priv); |
1375 | |
1376 | dev_dbg(dev, "setup packet OK\n" ); |
1377 | |
1378 | complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ |
1379 | |
1380 | return 0; |
1381 | } |
1382 | |
1383 | static int usbhsh_irq_setup_err(struct usbhs_priv *priv, |
1384 | struct usbhs_irq_state *irq_state) |
1385 | { |
1386 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1387 | struct device *dev = usbhs_priv_to_dev(priv); |
1388 | |
1389 | dev_dbg(dev, "setup packet Err\n" ); |
1390 | |
1391 | complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ |
1392 | |
1393 | return 0; |
1394 | } |
1395 | |
1396 | /* |
1397 | * module start/stop |
1398 | */ |
1399 | static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) |
1400 | { |
1401 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1402 | struct usbhs_pipe *pipe; |
1403 | struct renesas_usbhs_driver_pipe_config *pipe_configs = |
1404 | usbhs_get_dparam(priv, pipe_configs); |
1405 | int pipe_size = usbhs_get_dparam(priv, pipe_size); |
1406 | int old_type, dir_in, i; |
1407 | |
1408 | /* init all pipe */ |
1409 | old_type = USB_ENDPOINT_XFER_CONTROL; |
1410 | for (i = 0; i < pipe_size; i++) { |
1411 | |
1412 | /* |
1413 | * data "output" will be finished as soon as possible, |
1414 | * but there is no guaranty at data "input" case. |
1415 | * |
1416 | * "input" needs "standby" pipe. |
1417 | * So, "input" direction pipe > "output" direction pipe |
1418 | * is good idea. |
1419 | * |
1420 | * 1st USB_ENDPOINT_XFER_xxx will be output direction, |
1421 | * and the other will be input direction here. |
1422 | * |
1423 | * ex) |
1424 | * ... |
1425 | * USB_ENDPOINT_XFER_ISOC -> dir out |
1426 | * USB_ENDPOINT_XFER_ISOC -> dir in |
1427 | * USB_ENDPOINT_XFER_BULK -> dir out |
1428 | * USB_ENDPOINT_XFER_BULK -> dir in |
1429 | * USB_ENDPOINT_XFER_BULK -> dir in |
1430 | * ... |
1431 | */ |
1432 | dir_in = (pipe_configs[i].type == old_type); |
1433 | old_type = pipe_configs[i].type; |
1434 | |
1435 | if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) { |
1436 | pipe = usbhs_dcp_malloc(priv); |
1437 | usbhsh_hpriv_to_dcp(hpriv) = pipe; |
1438 | } else { |
1439 | pipe = usbhs_pipe_malloc(priv, |
1440 | endpoint_type: pipe_configs[i].type, |
1441 | dir_in); |
1442 | } |
1443 | |
1444 | pipe->mod_private = NULL; |
1445 | } |
1446 | } |
1447 | |
1448 | static int usbhsh_start(struct usbhs_priv *priv) |
1449 | { |
1450 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1451 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
1452 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
1453 | struct device *dev = usbhs_priv_to_dev(priv); |
1454 | int ret; |
1455 | |
1456 | /* add hcd */ |
1457 | ret = usb_add_hcd(hcd, irqnum: 0, irqflags: 0); |
1458 | if (ret < 0) |
1459 | return 0; |
1460 | device_wakeup_enable(dev: hcd->self.controller); |
1461 | |
1462 | /* |
1463 | * pipe initialize and enable DCP |
1464 | */ |
1465 | usbhs_fifo_init(priv); |
1466 | usbhs_pipe_init(priv, |
1467 | dma_map_ctrl: usbhsh_dma_map_ctrl); |
1468 | usbhsh_pipe_init_for_host(priv); |
1469 | |
1470 | /* |
1471 | * system config enble |
1472 | * - HI speed |
1473 | * - host |
1474 | * - usb module |
1475 | */ |
1476 | usbhs_sys_host_ctrl(priv, enable: 1); |
1477 | |
1478 | /* |
1479 | * enable irq callback |
1480 | */ |
1481 | mod->irq_attch = usbhsh_irq_attch; |
1482 | mod->irq_dtch = usbhsh_irq_dtch; |
1483 | mod->irq_sack = usbhsh_irq_setup_ack; |
1484 | mod->irq_sign = usbhsh_irq_setup_err; |
1485 | usbhs_irq_callback_update(priv, mod); |
1486 | |
1487 | dev_dbg(dev, "start host\n" ); |
1488 | |
1489 | return ret; |
1490 | } |
1491 | |
1492 | static int usbhsh_stop(struct usbhs_priv *priv) |
1493 | { |
1494 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1495 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
1496 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
1497 | struct device *dev = usbhs_priv_to_dev(priv); |
1498 | |
1499 | /* |
1500 | * disable irq callback |
1501 | */ |
1502 | mod->irq_attch = NULL; |
1503 | mod->irq_dtch = NULL; |
1504 | mod->irq_sack = NULL; |
1505 | mod->irq_sign = NULL; |
1506 | usbhs_irq_callback_update(priv, mod); |
1507 | |
1508 | usb_remove_hcd(hcd); |
1509 | |
1510 | /* disable sys */ |
1511 | usbhs_sys_host_ctrl(priv, enable: 0); |
1512 | |
1513 | dev_dbg(dev, "quit host\n" ); |
1514 | |
1515 | return 0; |
1516 | } |
1517 | |
1518 | int usbhs_mod_host_probe(struct usbhs_priv *priv) |
1519 | { |
1520 | struct usbhsh_hpriv *hpriv; |
1521 | struct usb_hcd *hcd; |
1522 | struct usbhsh_device *udev; |
1523 | struct device *dev = usbhs_priv_to_dev(priv); |
1524 | int i; |
1525 | |
1526 | /* initialize hcd */ |
1527 | hcd = usb_create_hcd(driver: &usbhsh_driver, dev, bus_name: usbhsh_hcd_name); |
1528 | if (!hcd) { |
1529 | dev_err(dev, "Failed to create hcd\n" ); |
1530 | return -ENOMEM; |
1531 | } |
1532 | hcd->has_tt = 1; /* for low/full speed */ |
1533 | |
1534 | /* |
1535 | * CAUTION |
1536 | * |
1537 | * There is no guarantee that it is possible to access usb module here. |
1538 | * Don't accesses to it. |
1539 | * The accesse will be enable after "usbhsh_start" |
1540 | */ |
1541 | |
1542 | hpriv = usbhsh_hcd_to_hpriv(hcd); |
1543 | |
1544 | /* |
1545 | * register itself |
1546 | */ |
1547 | usbhs_mod_register(priv, usb: &hpriv->mod, id: USBHS_HOST); |
1548 | |
1549 | /* init hpriv */ |
1550 | hpriv->mod.name = "host" ; |
1551 | hpriv->mod.start = usbhsh_start; |
1552 | hpriv->mod.stop = usbhsh_stop; |
1553 | usbhsh_port_stat_init(hpriv); |
1554 | |
1555 | /* init all device */ |
1556 | usbhsh_for_each_udev_with_dev0(udev, hpriv, i) { |
1557 | udev->usbv = NULL; |
1558 | INIT_LIST_HEAD(list: &udev->ep_list_head); |
1559 | } |
1560 | |
1561 | dev_info(dev, "host probed\n" ); |
1562 | |
1563 | return 0; |
1564 | } |
1565 | |
1566 | int usbhs_mod_host_remove(struct usbhs_priv *priv) |
1567 | { |
1568 | struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); |
1569 | struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); |
1570 | |
1571 | usb_put_hcd(hcd); |
1572 | |
1573 | return 0; |
1574 | } |
1575 | |