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ARC: [plat-eznps] spinlock aware for MTM
[linux/fpc-iii.git] / drivers / usb / renesas_usbhs / mod_host.c
blobdfb346e9bd0c7cca4738ed174cda57203aaf2e83
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/list.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23 #include <linux/usb/hcd.h>
24 #include "common.h"
25
26 /*
27 *** HARDWARE LIMITATION ***
28 *
29 * 1) renesas_usbhs has a limited number of controllable devices.
30 * it can control only 9 devices in generally.
31 * see DEVADDn / DCPMAXP / PIPEMAXP.
32 *
33 * 2) renesas_usbhs pipe number is limited.
34 * the pipe will be re-used for each devices.
35 * so, software should control DATA0/1 sequence of each devices.
36 */
37
38
39 /*
40 * image of mod_host
41 *
42 * +--------+
43 * | udev 0 | --> it is used when set address
44 * +--------+
45 *
46 * +--------+ pipes are reused for each uep.
47 * | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
48 * +--------+ | | other device requested
49 * +- [uep 1 (bulk)] --|---+ +--------------+
50 * | +--------------> | pipe0 (dcp) |
51 * +- [uep 2 (bulk)] -@ | +--------------+
52 * | | pipe1 (isoc) |
53 * +--------+ | +--------------+
54 * | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) |
55 * +--------+ | +--------------+
56 * +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) |
57 * | | +--------------+
58 * +--------+ +-----|------> | pipe4 (int) |
59 * | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+
60 * +--------+ | | | .... |
61 * +- [uep 1 (bulk)] -@ | | .... |
62 * | |
63 * +- [uep 2 (bulk)]-----------+
64 *
65 * @ : uep requested free pipe, but all have been used.
66 * now it is waiting for free pipe
67 */
68
69
70 /*
71 * struct
72 */
73 struct usbhsh_request {
74 struct urb *urb;
75 struct usbhs_pkt pkt;
76 };
77
78 struct usbhsh_device {
79 struct usb_device *usbv;
80 struct list_head ep_list_head; /* list of usbhsh_ep */
81 };
82
83 struct usbhsh_ep {
84 struct usbhs_pipe *pipe; /* attached pipe */
85 struct usbhsh_device *udev; /* attached udev */
86 struct usb_host_endpoint *ep;
87 struct list_head ep_list; /* list to usbhsh_device */
88 unsigned int counter; /* pipe attach counter */
89 };
90
91 #define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
92 #define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */
93 struct usbhsh_hpriv {
94 struct usbhs_mod mod;
95 struct usbhs_pipe *dcp;
96
97 struct usbhsh_device udev[USBHSH_DEVICE_MAX];
98
99 u32 port_stat; /* USB_PORT_STAT_xxx */
100
101 struct completion setup_ack_done;
102 };
103
104
105 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
106
107 /*
108 * macro
109 */
110 #define usbhsh_priv_to_hpriv(priv) \
111 container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
112
113 #define __usbhsh_for_each_udev(start, pos, h, i) \
114 for ((i) = start; \
115 ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i)); \
116 (i)++)
117
118 #define usbhsh_for_each_udev(pos, hpriv, i) \
119 __usbhsh_for_each_udev(1, pos, hpriv, i)
120
121 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \
122 __usbhsh_for_each_udev(0, pos, hpriv, i)
123
124 #define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv)
125 #define usbhsh_hcd_to_dev(h) ((h)->self.controller)
126
127 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
128 #define usbhsh_hpriv_to_dcp(h) ((h)->dcp)
129 #define usbhsh_hpriv_to_hcd(h) \
130 container_of((void *)h, struct usb_hcd, hcd_priv)
131
132 #define usbhsh_ep_to_uep(u) ((u)->hcpriv)
133 #define usbhsh_uep_to_pipe(u) ((u)->pipe)
134 #define usbhsh_uep_to_udev(u) ((u)->udev)
135 #define usbhsh_uep_to_ep(u) ((u)->ep)
136
137 #define usbhsh_urb_to_ureq(u) ((u)->hcpriv)
138 #define usbhsh_urb_to_usbv(u) ((u)->dev)
139
140 #define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev)
141
142 #define usbhsh_udev_to_usbv(h) ((h)->usbv)
143 #define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h)
144
145 #define usbhsh_pipe_to_uep(p) ((p)->mod_private)
146
147 #define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent))
148 #define usbhsh_device_hubport(d) ((d)->usbv->portnum)
149 #define usbhsh_device_number(h, d) ((int)((d) - (h)->udev))
150 #define usbhsh_device_nth(h, d) ((h)->udev + d)
151 #define usbhsh_device0(h) usbhsh_device_nth(h, 0)
152
153 #define usbhsh_port_stat_init(h) ((h)->port_stat = 0)
154 #define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s))
155 #define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s))
156 #define usbhsh_port_stat_get(h) ((h)->port_stat)
157
158 #define usbhsh_pkt_to_ureq(p) \
159 container_of((void *)p, struct usbhsh_request, pkt)
160
161 /*
162 * req alloc/free
163 */
164 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
165 struct urb *urb,
166 gfp_t mem_flags)
167 {
168 struct usbhsh_request *ureq;
169
170 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
171 if (!ureq)
172 return NULL;
173
174 usbhs_pkt_init(&ureq->pkt);
175 ureq->urb = urb;
176 usbhsh_urb_to_ureq(urb) = ureq;
177
178 return ureq;
179 }
180
181 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
182 struct usbhsh_request *ureq)
183 {
184 usbhsh_urb_to_ureq(ureq->urb) = NULL;
185 ureq->urb = NULL;
186
187 kfree(ureq);
188 }
189
190 /*
191 * status
192 */
193 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
194 {
195 /*
196 * we can decide some device is attached or not
197 * by checking mod.irq_attch
198 * see
199 * usbhsh_irq_attch()
200 * usbhsh_irq_dtch()
201 */
202 return (hpriv->mod.irq_attch == NULL);
203 }
204
205 /*
206 * pipe control
207 */
208 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
209 struct urb *urb,
210 struct usbhs_pkt *pkt)
211 {
212 int len = urb->actual_length;
213 int maxp = usb_endpoint_maxp(&urb->ep->desc);
214 int t = 0;
215
216 /* DCP is out of sequence control */
217 if (usb_pipecontrol(urb->pipe))
218 return;
219
220 /*
221 * renesas_usbhs pipe has a limitation in a number.
222 * So, driver should re-use the limited pipe for each device/endpoint.
223 * DATA0/1 sequence should be saved for it.
224 * see [image of mod_host]
225 * [HARDWARE LIMITATION]
226 */
227
228 /*
229 * next sequence depends on actual_length
230 *
231 * ex) actual_length = 1147, maxp = 512
232 * data0 : 512
233 * data1 : 512
234 * data0 : 123
235 * data1 is the next sequence
236 */
237 t = len / maxp;
238 if (len % maxp)
239 t++;
240 if (pkt->zero)
241 t++;
242 t %= 2;
243
244 if (t)
245 usb_dotoggle(urb->dev,
246 usb_pipeendpoint(urb->pipe),
247 usb_pipeout(urb->pipe));
248 }
249
250 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
251 struct urb *urb);
252
253 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
254 struct urb *urb)
255 {
256 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
257 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
258 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
259 struct usbhs_pipe *pipe;
260 struct usb_endpoint_descriptor *desc = &urb->ep->desc;
261 struct device *dev = usbhs_priv_to_dev(priv);
262 unsigned long flags;
263 int dir_in_req = !!usb_pipein(urb->pipe);
264 int is_dcp = usb_endpoint_xfer_control(desc);
265 int i, dir_in;
266 int ret = -EBUSY;
267
268 /******************** spin lock ********************/
269 usbhs_lock(priv, flags);
270
271 /*
272 * if uep has been attached to pipe,
273 * reuse it
274 */
275 if (usbhsh_uep_to_pipe(uep)) {
276 ret = 0;
277 goto usbhsh_pipe_attach_done;
278 }
279
280 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
281
282 /* check pipe type */
283 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
284 continue;
285
286 /* check pipe direction if normal pipe */
287 if (!is_dcp) {
288 dir_in = !!usbhs_pipe_is_dir_in(pipe);
289 if (0 != (dir_in - dir_in_req))
290 continue;
291 }
292
293 /* check pipe is free */
294 if (usbhsh_pipe_to_uep(pipe))
295 continue;
296
297 /*
298 * attach pipe to uep
299 *
300 * usbhs_pipe_config_update() should be called after
301 * usbhs_set_device_config()
302 * see
303 * DCPMAXP/PIPEMAXP
304 */
305 usbhsh_uep_to_pipe(uep) = pipe;
306 usbhsh_pipe_to_uep(pipe) = uep;
307
308 usbhs_pipe_config_update(pipe,
309 usbhsh_device_number(hpriv, udev),
310 usb_endpoint_num(desc),
311 usb_endpoint_maxp(desc));
312
313 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
314 usbhsh_device_number(hpriv, udev),
315 usb_endpoint_num(desc),
316 usbhs_pipe_name(pipe),
317 dir_in_req ? "in" : "out");
318
319 ret = 0;
320 break;
321 }
322
323 usbhsh_pipe_attach_done:
324 if (0 == ret)
325 uep->counter++;
326
327 usbhs_unlock(priv, flags);
328 /******************** spin unlock ******************/
329
330 return ret;
331 }
332
333 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
334 struct usbhsh_ep *uep)
335 {
336 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
337 struct usbhs_pipe *pipe;
338 struct device *dev = usbhs_priv_to_dev(priv);
339 unsigned long flags;
340
341 if (unlikely(!uep)) {
342 dev_err(dev, "no uep\n");
343 return;
344 }
345
346 /******************** spin lock ********************/
347 usbhs_lock(priv, flags);
348
349 pipe = usbhsh_uep_to_pipe(uep);
350
351 if (unlikely(!pipe)) {
352 dev_err(dev, "uep doens't have pipe\n");
353 } else if (1 == uep->counter--) { /* last user */
354 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
355 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
356
357 /* detach pipe from uep */
358 usbhsh_uep_to_pipe(uep) = NULL;
359 usbhsh_pipe_to_uep(pipe) = NULL;
360
361 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
362 usbhsh_device_number(hpriv, udev),
363 usb_endpoint_num(&ep->desc),
364 usbhs_pipe_name(pipe));
365 }
366
367 usbhs_unlock(priv, flags);
368 /******************** spin unlock ******************/
369 }
370
371 /*
372 * endpoint control
373 */
374 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
375 struct urb *urb,
376 gfp_t mem_flags)
377 {
378 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
379 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
380 struct usb_host_endpoint *ep = urb->ep;
381 struct usbhsh_ep *uep;
382 struct device *dev = usbhs_priv_to_dev(priv);
383 struct usb_endpoint_descriptor *desc = &ep->desc;
384 unsigned long flags;
385
386 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
387 if (!uep)
388 return -ENOMEM;
389
390 /******************** spin lock ********************/
391 usbhs_lock(priv, flags);
392
393 /*
394 * init endpoint
395 */
396 uep->counter = 0;
397 INIT_LIST_HEAD(&uep->ep_list);
398 list_add_tail(&uep->ep_list, &udev->ep_list_head);
399
400 usbhsh_uep_to_udev(uep) = udev;
401 usbhsh_uep_to_ep(uep) = ep;
402 usbhsh_ep_to_uep(ep) = uep;
403
404 usbhs_unlock(priv, flags);
405 /******************** spin unlock ******************/
406
407 dev_dbg(dev, "%s [%d-%d]\n", __func__,
408 usbhsh_device_number(hpriv, udev),
409 usb_endpoint_num(desc));
410
411 return 0;
412 }
413
414 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
415 struct usb_host_endpoint *ep)
416 {
417 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
418 struct device *dev = usbhs_priv_to_dev(priv);
419 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
420 unsigned long flags;
421
422 if (!uep)
423 return;
424
425 dev_dbg(dev, "%s [%d-%d]\n", __func__,
426 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
427 usb_endpoint_num(&ep->desc));
428
429 if (usbhsh_uep_to_pipe(uep))
430 usbhsh_pipe_detach(hpriv, uep);
431
432 /******************** spin lock ********************/
433 usbhs_lock(priv, flags);
434
435 /* remove this endpoint from udev */
436 list_del_init(&uep->ep_list);
437
438 usbhsh_uep_to_udev(uep) = NULL;
439 usbhsh_uep_to_ep(uep) = NULL;
440 usbhsh_ep_to_uep(ep) = NULL;
441
442 usbhs_unlock(priv, flags);
443 /******************** spin unlock ******************/
444
445 kfree(uep);
446 }
447
448 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
449 struct usbhsh_device *udev)
450 {
451 struct usbhsh_ep *uep, *next;
452
453 list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
454 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
455 }
456
457 /*
458 * device control
459 */
460 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
461 struct usbhsh_device *udev)
462 {
463 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
464
465 return hcd->self.root_hub == usbv->parent;
466 }
467
468 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
469 {
470 return !list_empty(&udev->ep_list_head);
471 }
472
473 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
474 struct urb *urb)
475 {
476 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
477 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
478
479 /* usbhsh_device_attach() is still not called */
480 if (!udev)
481 return NULL;
482
483 /* if it is device0, return it */
484 if (0 == usb_pipedevice(urb->pipe))
485 return usbhsh_device0(hpriv);
486
487 /* return attached device */
488 return udev;
489 }
490
491 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
492 struct urb *urb)
493 {
494 struct usbhsh_device *udev = NULL;
495 struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
496 struct usbhsh_device *pos;
497 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
498 struct device *dev = usbhsh_hcd_to_dev(hcd);
499 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
500 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
501 unsigned long flags;
502 u16 upphub, hubport;
503 int i;
504
505 /*
506 * This function should be called only while urb is pointing to device0.
507 * It will attach unused usbhsh_device to urb (usbv),
508 * and initialize device0.
509 * You can use usbhsh_device_get() to get "current" udev,
510 * and usbhsh_usbv_to_udev() is for "attached" udev.
511 */
512 if (0 != usb_pipedevice(urb->pipe)) {
513 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
514 return NULL;
515 }
516
517 /******************** spin lock ********************/
518 usbhs_lock(priv, flags);
519
520 /*
521 * find unused device
522 */
523 usbhsh_for_each_udev(pos, hpriv, i) {
524 if (usbhsh_udev_is_used(pos))
525 continue;
526 udev = pos;
527 break;
528 }
529
530 if (udev) {
531 /*
532 * usbhsh_usbv_to_udev()
533 * usbhsh_udev_to_usbv()
534 * will be enable
535 */
536 dev_set_drvdata(&usbv->dev, udev);
537 udev->usbv = usbv;
538 }
539
540 usbhs_unlock(priv, flags);
541 /******************** spin unlock ******************/
542
543 if (!udev) {
544 dev_err(dev, "no free usbhsh_device\n");
545 return NULL;
546 }
547
548 if (usbhsh_device_has_endpoint(udev)) {
549 dev_warn(dev, "udev have old endpoint\n");
550 usbhsh_endpoint_detach_all(hpriv, udev);
551 }
552
553 if (usbhsh_device_has_endpoint(udev0)) {
554 dev_warn(dev, "udev0 have old endpoint\n");
555 usbhsh_endpoint_detach_all(hpriv, udev0);
556 }
557
558 /* uep will be attached */
559 INIT_LIST_HEAD(&udev0->ep_list_head);
560 INIT_LIST_HEAD(&udev->ep_list_head);
561
562 /*
563 * set device0 config
564 */
565 usbhs_set_device_config(priv,
566 0, 0, 0, usbv->speed);
567
568 /*
569 * set new device config
570 */
571 upphub = 0;
572 hubport = 0;
573 if (!usbhsh_connected_to_rhdev(hcd, udev)) {
574 /* if udev is not connected to rhdev, it means parent is Hub */
575 struct usbhsh_device *parent = usbhsh_device_parent(udev);
576
577 upphub = usbhsh_device_number(hpriv, parent);
578 hubport = usbhsh_device_hubport(udev);
579
580 dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
581 upphub, hubport, parent);
582 }
583
584 usbhs_set_device_config(priv,
585 usbhsh_device_number(hpriv, udev),
586 upphub, hubport, usbv->speed);
587
588 dev_dbg(dev, "%s [%d](%p)\n", __func__,
589 usbhsh_device_number(hpriv, udev), udev);
590
591 return udev;
592 }
593
594 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
595 struct usbhsh_device *udev)
596 {
597 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
598 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
599 struct device *dev = usbhsh_hcd_to_dev(hcd);
600 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
601 unsigned long flags;
602
603 dev_dbg(dev, "%s [%d](%p)\n", __func__,
604 usbhsh_device_number(hpriv, udev), udev);
605
606 if (usbhsh_device_has_endpoint(udev)) {
607 dev_warn(dev, "udev still have endpoint\n");
608 usbhsh_endpoint_detach_all(hpriv, udev);
609 }
610
611 /*
612 * There is nothing to do if it is device0.
613 * see
614 * usbhsh_device_attach()
615 * usbhsh_device_get()
616 */
617 if (0 == usbhsh_device_number(hpriv, udev))
618 return;
619
620 /******************** spin lock ********************/
621 usbhs_lock(priv, flags);
622
623 /*
624 * usbhsh_usbv_to_udev()
625 * usbhsh_udev_to_usbv()
626 * will be disable
627 */
628 dev_set_drvdata(&usbv->dev, NULL);
629 udev->usbv = NULL;
630
631 usbhs_unlock(priv, flags);
632 /******************** spin unlock ******************/
633 }
634
635 /*
636 * queue push/pop
637 */
638 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
639 {
640 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
641 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
642 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
643 struct urb *urb = ureq->urb;
644 struct device *dev = usbhs_priv_to_dev(priv);
645 int status = 0;
646
647 dev_dbg(dev, "%s\n", __func__);
648
649 if (!urb) {
650 dev_warn(dev, "pkt doesn't have urb\n");
651 return;
652 }
653
654 if (!usbhsh_is_running(hpriv))
655 status = -ESHUTDOWN;
656
657 urb->actual_length = pkt->actual;
658
659 usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
660 usbhsh_ureq_free(hpriv, ureq);
661
662 usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
663
664 usb_hcd_unlink_urb_from_ep(hcd, urb);
665 usb_hcd_giveback_urb(hcd, urb, status);
666 }
667
668 static int usbhsh_queue_push(struct usb_hcd *hcd,
669 struct urb *urb,
670 gfp_t mem_flags)
671 {
672 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
673 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
674 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
675 struct device *dev = usbhsh_hcd_to_dev(hcd);
676 struct usbhsh_request *ureq;
677 void *buf;
678 int len, sequence;
679
680 if (usb_pipeisoc(urb->pipe)) {
681 dev_err(dev, "pipe iso is not supported now\n");
682 return -EIO;
683 }
684
685 /* this ureq will be freed on usbhsh_queue_done() */
686 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
687 if (unlikely(!ureq)) {
688 dev_err(dev, "ureq alloc fail\n");
689 return -ENOMEM;
690 }
691
692 if (usb_pipein(urb->pipe))
693 pipe->handler = &usbhs_fifo_dma_pop_handler;
694 else
695 pipe->handler = &usbhs_fifo_dma_push_handler;
696
697 buf = (void *)(urb->transfer_buffer + urb->actual_length);
698 len = urb->transfer_buffer_length - urb->actual_length;
699
700 sequence = usb_gettoggle(urb->dev,
701 usb_pipeendpoint(urb->pipe),
702 usb_pipeout(urb->pipe));
703
704 dev_dbg(dev, "%s\n", __func__);
705 usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
706 buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
707 sequence);
708
709 usbhs_pkt_start(pipe);
710
711 return 0;
712 }
713
714 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
715 struct usbhs_pipe *pipe)
716 {
717 struct usbhs_pkt *pkt;
718
719 while (1) {
720 pkt = usbhs_pkt_pop(pipe, NULL);
721 if (!pkt)
722 break;
723
724 /*
725 * if all packet are gone, usbhsh_endpoint_disable()
726 * will be called.
727 * then, attached device/endpoint/pipe will be detached
728 */
729 usbhsh_queue_done(priv, pkt);
730 }
731 }
732
733 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
734 {
735 struct usbhs_pipe *pos;
736 int i;
737
738 usbhs_for_each_pipe_with_dcp(pos, priv, i)
739 usbhsh_queue_force_pop(priv, pos);
740 }
741
742 /*
743 * DCP setup stage
744 */
745 static int usbhsh_is_request_address(struct urb *urb)
746 {
747 struct usb_ctrlrequest *req;
748
749 req = (struct usb_ctrlrequest *)urb->setup_packet;
750
751 if ((DeviceOutRequest == req->bRequestType << 8) &&
752 (USB_REQ_SET_ADDRESS == req->bRequest))
753 return 1;
754 else
755 return 0;
756 }
757
758 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
759 struct urb *urb,
760 struct usbhs_pipe *pipe)
761 {
762 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
763 struct usb_ctrlrequest req;
764 struct device *dev = usbhs_priv_to_dev(priv);
765
766 /*
767 * wait setup packet ACK
768 * see
769 * usbhsh_irq_setup_ack()
770 * usbhsh_irq_setup_err()
771 */
772 init_completion(&hpriv->setup_ack_done);
773
774 /* copy original request */
775 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
776
777 /*
778 * renesas_usbhs can not use original usb address.
779 * see HARDWARE LIMITATION.
780 * modify usb address here to use attached device.
781 * see usbhsh_device_attach()
782 */
783 if (usbhsh_is_request_address(urb)) {
784 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
785 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
786
787 /* udev is a attached device */
788 req.wValue = usbhsh_device_number(hpriv, udev);
789 dev_dbg(dev, "create new address - %d\n", req.wValue);
790 }
791
792 /* set request */
793 usbhs_usbreq_set_val(priv, &req);
794
795 /*
796 * wait setup packet ACK
797 */
798 wait_for_completion(&hpriv->setup_ack_done);
799
800 dev_dbg(dev, "%s done\n", __func__);
801 }
802
803 /*
804 * DCP data stage
805 */
806 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
807 struct usbhs_pkt *pkt)
808 {
809 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
810 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
811
812 /* this ureq was connected to urb when usbhsh_urb_enqueue() */
813
814 usbhsh_ureq_free(hpriv, ureq);
815 }
816
817 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
818 struct urb *urb,
819 struct usbhs_pipe *pipe,
820 gfp_t mem_flags)
821
822 {
823 struct usbhsh_request *ureq;
824
825 /* this ureq will be freed on usbhsh_data_stage_packet_done() */
826 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
827 if (unlikely(!ureq))
828 return -ENOMEM;
829
830 if (usb_pipein(urb->pipe))
831 pipe->handler = &usbhs_dcp_data_stage_in_handler;
832 else
833 pipe->handler = &usbhs_dcp_data_stage_out_handler;
834
835 usbhs_pkt_push(pipe, &ureq->pkt,
836 usbhsh_data_stage_packet_done,
837 urb->transfer_buffer,
838 urb->transfer_buffer_length,
839 (urb->transfer_flags & URB_ZERO_PACKET),
840 -1);
841
842 return 0;
843 }
844
845 /*
846 * DCP status stage
847 */
848 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
849 struct urb *urb,
850 struct usbhs_pipe *pipe,
851 gfp_t mem_flags)
852 {
853 struct usbhsh_request *ureq;
854
855 /* This ureq will be freed on usbhsh_queue_done() */
856 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
857 if (unlikely(!ureq))
858 return -ENOMEM;
859
860 if (usb_pipein(urb->pipe))
861 pipe->handler = &usbhs_dcp_status_stage_in_handler;
862 else
863 pipe->handler = &usbhs_dcp_status_stage_out_handler;
864
865 usbhs_pkt_push(pipe, &ureq->pkt,
866 usbhsh_queue_done,
867 NULL,
868 urb->transfer_buffer_length,
869 0, -1);
870
871 return 0;
872 }
873
874 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
875 struct urb *urb,
876 gfp_t mflags)
877 {
878 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
879 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
880 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
881 struct device *dev = usbhsh_hcd_to_dev(hcd);
882 int ret;
883
884 dev_dbg(dev, "%s\n", __func__);
885
886 /*
887 * setup stage
888 *
889 * usbhsh_send_setup_stage_packet() wait SACK/SIGN
890 */
891 usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
892
893 /*
894 * data stage
895 *
896 * It is pushed only when urb has buffer.
897 */
898 if (urb->transfer_buffer_length) {
899 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
900 if (ret < 0) {
901 dev_err(dev, "data stage failed\n");
902 return ret;
903 }
904 }
905
906 /*
907 * status stage
908 */
909 ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
910 if (ret < 0) {
911 dev_err(dev, "status stage failed\n");
912 return ret;
913 }
914
915 /*
916 * start pushed packets
917 */
918 usbhs_pkt_start(pipe);
919
920 return 0;
921 }
922
923 /*
924 * dma map functions
925 */
926 static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
927 int map)
928 {
929 if (map) {
930 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
931 struct urb *urb = ureq->urb;
932
933 /* it can not use scatter/gather */
934 if (urb->num_sgs)
935 return -EINVAL;
936
937 pkt->dma = urb->transfer_dma;
938 if (!pkt->dma)
939 return -EINVAL;
940 }
941
942 return 0;
943 }
944
945 /*
946 * for hc_driver
947 */
948 static int usbhsh_host_start(struct usb_hcd *hcd)
949 {
950 return 0;
951 }
952
953 static void usbhsh_host_stop(struct usb_hcd *hcd)
954 {
955 }
956
957 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
958 struct urb *urb,
959 gfp_t mem_flags)
960 {
961 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
962 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
963 struct device *dev = usbhs_priv_to_dev(priv);
964 struct usb_host_endpoint *ep = urb->ep;
965 struct usbhsh_device *new_udev = NULL;
966 int is_dir_in = usb_pipein(urb->pipe);
967 int ret;
968
969 dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
970
971 if (!usbhsh_is_running(hpriv)) {
972 ret = -EIO;
973 dev_err(dev, "host is not running\n");
974 goto usbhsh_urb_enqueue_error_not_linked;
975 }
976
977 ret = usb_hcd_link_urb_to_ep(hcd, urb);
978 if (ret) {
979 dev_err(dev, "urb link failed\n");
980 goto usbhsh_urb_enqueue_error_not_linked;
981 }
982
983 /*
984 * attach udev if needed
985 * see [image of mod_host]
986 */
987 if (!usbhsh_device_get(hpriv, urb)) {
988 new_udev = usbhsh_device_attach(hpriv, urb);
989 if (!new_udev) {
990 ret = -EIO;
991 dev_err(dev, "device attach failed\n");
992 goto usbhsh_urb_enqueue_error_not_linked;
993 }
994 }
995
996 /*
997 * attach endpoint if needed
998 * see [image of mod_host]
999 */
1000 if (!usbhsh_ep_to_uep(ep)) {
1001 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1002 if (ret < 0) {
1003 dev_err(dev, "endpoint attach failed\n");
1004 goto usbhsh_urb_enqueue_error_free_device;
1005 }
1006 }
1007
1008 /*
1009 * attach pipe to endpoint
1010 * see [image of mod_host]
1011 */
1012 ret = usbhsh_pipe_attach(hpriv, urb);
1013 if (ret < 0) {
1014 dev_err(dev, "pipe attach failed\n");
1015 goto usbhsh_urb_enqueue_error_free_endpoint;
1016 }
1017
1018 /*
1019 * push packet
1020 */
1021 if (usb_pipecontrol(urb->pipe))
1022 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1023 else
1024 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1025
1026 return ret;
1027
1028 usbhsh_urb_enqueue_error_free_endpoint:
1029 usbhsh_endpoint_detach(hpriv, ep);
1030 usbhsh_urb_enqueue_error_free_device:
1031 if (new_udev)
1032 usbhsh_device_detach(hpriv, new_udev);
1033 usbhsh_urb_enqueue_error_not_linked:
1034
1035 dev_dbg(dev, "%s error\n", __func__);
1036
1037 return ret;
1038 }
1039
1040 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1041 {
1042 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1043 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1044
1045 if (ureq) {
1046 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1047 struct usbhs_pkt *pkt = &ureq->pkt;
1048
1049 usbhs_pkt_pop(pkt->pipe, pkt);
1050 usbhsh_queue_done(priv, pkt);
1051 }
1052
1053 return 0;
1054 }
1055
1056 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1057 struct usb_host_endpoint *ep)
1058 {
1059 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1060 struct usbhsh_device *udev;
1061 struct usbhsh_hpriv *hpriv;
1062
1063 /*
1064 * this function might be called manytimes by same hcd/ep
1065 * in-endpoint == out-endpoint if ep == dcp.
1066 */
1067 if (!uep)
1068 return;
1069
1070 udev = usbhsh_uep_to_udev(uep);
1071 hpriv = usbhsh_hcd_to_hpriv(hcd);
1072
1073 usbhsh_endpoint_detach(hpriv, ep);
1074
1075 /*
1076 * if there is no endpoint,
1077 * free device
1078 */
1079 if (!usbhsh_device_has_endpoint(udev))
1080 usbhsh_device_detach(hpriv, udev);
1081 }
1082
1083 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1084 {
1085 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1086 int roothub_id = 1; /* only 1 root hub */
1087
1088 /*
1089 * does port stat was changed ?
1090 * check USB_PORT_STAT_C_xxx << 16
1091 */
1092 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1093 *buf = (1 << roothub_id);
1094 else
1095 *buf = 0;
1096
1097 return !!(*buf);
1098 }
1099
1100 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1101 u16 typeReq, u16 wValue,
1102 u16 wIndex, char *buf, u16 wLength)
1103 {
1104 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1105 struct device *dev = usbhs_priv_to_dev(priv);
1106
1107 switch (wValue) {
1108 case C_HUB_OVER_CURRENT:
1109 case C_HUB_LOCAL_POWER:
1110 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1111 return 0;
1112 }
1113
1114 return -EPIPE;
1115 }
1116
1117 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1118 u16 typeReq, u16 wValue,
1119 u16 wIndex, char *buf, u16 wLength)
1120 {
1121 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1122 struct device *dev = usbhs_priv_to_dev(priv);
1123 int enable = (typeReq == SetPortFeature);
1124 int speed, i, timeout = 128;
1125 int roothub_id = 1; /* only 1 root hub */
1126
1127 /* common error */
1128 if (wIndex > roothub_id || wLength != 0)
1129 return -EPIPE;
1130
1131 /* check wValue */
1132 switch (wValue) {
1133 case USB_PORT_FEAT_POWER:
1134 usbhs_vbus_ctrl(priv, enable);
1135 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1136 break;
1137
1138 case USB_PORT_FEAT_ENABLE:
1139 case USB_PORT_FEAT_SUSPEND:
1140 case USB_PORT_FEAT_C_ENABLE:
1141 case USB_PORT_FEAT_C_SUSPEND:
1142 case USB_PORT_FEAT_C_CONNECTION:
1143 case USB_PORT_FEAT_C_OVER_CURRENT:
1144 case USB_PORT_FEAT_C_RESET:
1145 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1146 break;
1147
1148 case USB_PORT_FEAT_RESET:
1149 if (!enable)
1150 break;
1151
1152 usbhsh_port_stat_clear(hpriv,
1153 USB_PORT_STAT_HIGH_SPEED |
1154 USB_PORT_STAT_LOW_SPEED);
1155
1156 usbhsh_queue_force_pop_all(priv);
1157
1158 usbhs_bus_send_reset(priv);
1159 msleep(20);
1160 usbhs_bus_send_sof_enable(priv);
1161
1162 for (i = 0; i < timeout ; i++) {
1163 switch (usbhs_bus_get_speed(priv)) {
1164 case USB_SPEED_LOW:
1165 speed = USB_PORT_STAT_LOW_SPEED;
1166 goto got_usb_bus_speed;
1167 case USB_SPEED_HIGH:
1168 speed = USB_PORT_STAT_HIGH_SPEED;
1169 goto got_usb_bus_speed;
1170 case USB_SPEED_FULL:
1171 speed = 0;
1172 goto got_usb_bus_speed;
1173 }
1174
1175 msleep(20);
1176 }
1177 return -EPIPE;
1178
1179 got_usb_bus_speed:
1180 usbhsh_port_stat_set(hpriv, speed);
1181 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1182
1183 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1184 __func__, speed);
1185
1186 /* status change is not needed */
1187 return 0;
1188
1189 default:
1190 return -EPIPE;
1191 }
1192
1193 /* set/clear status */
1194 if (enable)
1195 usbhsh_port_stat_set(hpriv, (1 << wValue));
1196 else
1197 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1198
1199 return 0;
1200 }
1201
1202 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1203 u16 typeReq, u16 wValue,
1204 u16 wIndex, char *buf, u16 wLength)
1205 {
1206 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1207 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1208 struct device *dev = usbhs_priv_to_dev(priv);
1209 int roothub_id = 1; /* only 1 root hub */
1210
1211 switch (typeReq) {
1212 case GetHubStatus:
1213 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1214
1215 *buf = 0x00;
1216 break;
1217
1218 case GetPortStatus:
1219 if (wIndex != roothub_id)
1220 return -EPIPE;
1221
1222 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1223 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1224 break;
1225
1226 case GetHubDescriptor:
1227 desc->bDescriptorType = USB_DT_HUB;
1228 desc->bHubContrCurrent = 0;
1229 desc->bNbrPorts = roothub_id;
1230 desc->bDescLength = 9;
1231 desc->bPwrOn2PwrGood = 0;
1232 desc->wHubCharacteristics =
1233 cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1234 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1);
1235 desc->u.hs.DeviceRemovable[1] = ~0;
1236 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1237 break;
1238 }
1239
1240 return 0;
1241 }
1242
1243 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1244 u16 wIndex, char *buf, u16 wLength)
1245 {
1246 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1247 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1248 struct device *dev = usbhs_priv_to_dev(priv);
1249 int ret = -EPIPE;
1250
1251 switch (typeReq) {
1252
1253 /* Hub Feature */
1254 case ClearHubFeature:
1255 case SetHubFeature:
1256 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1257 wValue, wIndex, buf, wLength);
1258 break;
1259
1260 /* Port Feature */
1261 case SetPortFeature:
1262 case ClearPortFeature:
1263 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1264 wValue, wIndex, buf, wLength);
1265 break;
1266
1267 /* Get status */
1268 case GetHubStatus:
1269 case GetPortStatus:
1270 case GetHubDescriptor:
1271 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1272 wValue, wIndex, buf, wLength);
1273 break;
1274 }
1275
1276 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1277 typeReq, ret, usbhsh_port_stat_get(hpriv));
1278
1279 return ret;
1280 }
1281
1282 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1283 {
1284 /* nothing to do */
1285 return 0;
1286 }
1287
1288 static struct hc_driver usbhsh_driver = {
1289 .description = usbhsh_hcd_name,
1290 .hcd_priv_size = sizeof(struct usbhsh_hpriv),
1291
1292 /*
1293 * generic hardware linkage
1294 */
1295 .flags = HCD_USB2,
1296
1297 .start = usbhsh_host_start,
1298 .stop = usbhsh_host_stop,
1299
1300 /*
1301 * managing i/o requests and associated device resources
1302 */
1303 .urb_enqueue = usbhsh_urb_enqueue,
1304 .urb_dequeue = usbhsh_urb_dequeue,
1305 .endpoint_disable = usbhsh_endpoint_disable,
1306
1307 /*
1308 * root hub
1309 */
1310 .hub_status_data = usbhsh_hub_status_data,
1311 .hub_control = usbhsh_hub_control,
1312 .bus_suspend = usbhsh_bus_nop,
1313 .bus_resume = usbhsh_bus_nop,
1314 };
1315
1316 /*
1317 * interrupt functions
1318 */
1319 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1320 struct usbhs_irq_state *irq_state)
1321 {
1322 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1323 struct device *dev = usbhs_priv_to_dev(priv);
1324
1325 dev_dbg(dev, "device attached\n");
1326
1327 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1328 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1329
1330 /*
1331 * attch interrupt might happen infinitely on some device
1332 * (on self power USB hub ?)
1333 * disable it here.
1334 *
1335 * usbhsh_is_running() becomes effective
1336 * according to this process.
1337 * see
1338 * usbhsh_is_running()
1339 * usbhsh_urb_enqueue()
1340 */
1341 hpriv->mod.irq_attch = NULL;
1342 usbhs_irq_callback_update(priv, &hpriv->mod);
1343
1344 return 0;
1345 }
1346
1347 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1348 struct usbhs_irq_state *irq_state)
1349 {
1350 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1351 struct device *dev = usbhs_priv_to_dev(priv);
1352
1353 dev_dbg(dev, "device detached\n");
1354
1355 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1356 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1357
1358 /*
1359 * enable attch interrupt again
1360 *
1361 * usbhsh_is_running() becomes invalid
1362 * according to this process.
1363 * see
1364 * usbhsh_is_running()
1365 * usbhsh_urb_enqueue()
1366 */
1367 hpriv->mod.irq_attch = usbhsh_irq_attch;
1368 usbhs_irq_callback_update(priv, &hpriv->mod);
1369
1370 /*
1371 * usbhsh_queue_force_pop_all() should be called
1372 * after usbhsh_is_running() becomes invalid.
1373 */
1374 usbhsh_queue_force_pop_all(priv);
1375
1376 return 0;
1377 }
1378
1379 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1380 struct usbhs_irq_state *irq_state)
1381 {
1382 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1383 struct device *dev = usbhs_priv_to_dev(priv);
1384
1385 dev_dbg(dev, "setup packet OK\n");
1386
1387 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1388
1389 return 0;
1390 }
1391
1392 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1393 struct usbhs_irq_state *irq_state)
1394 {
1395 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1396 struct device *dev = usbhs_priv_to_dev(priv);
1397
1398 dev_dbg(dev, "setup packet Err\n");
1399
1400 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1401
1402 return 0;
1403 }
1404
1405 /*
1406 * module start/stop
1407 */
1408 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1409 {
1410 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1411 struct usbhs_pipe *pipe;
1412 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1413 usbhs_get_dparam(priv, pipe_configs);
1414 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1415 int old_type, dir_in, i;
1416
1417 /* init all pipe */
1418 old_type = USB_ENDPOINT_XFER_CONTROL;
1419 for (i = 0; i < pipe_size; i++) {
1420
1421 /*
1422 * data "output" will be finished as soon as possible,
1423 * but there is no guaranty at data "input" case.
1424 *
1425 * "input" needs "standby" pipe.
1426 * So, "input" direction pipe > "output" direction pipe
1427 * is good idea.
1428 *
1429 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1430 * and the other will be input direction here.
1431 *
1432 * ex)
1433 * ...
1434 * USB_ENDPOINT_XFER_ISOC -> dir out
1435 * USB_ENDPOINT_XFER_ISOC -> dir in
1436 * USB_ENDPOINT_XFER_BULK -> dir out
1437 * USB_ENDPOINT_XFER_BULK -> dir in
1438 * USB_ENDPOINT_XFER_BULK -> dir in
1439 * ...
1440 */
1441 dir_in = (pipe_configs[i].type == old_type);
1442 old_type = pipe_configs[i].type;
1443
1444 if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1445 pipe = usbhs_dcp_malloc(priv);
1446 usbhsh_hpriv_to_dcp(hpriv) = pipe;
1447 } else {
1448 pipe = usbhs_pipe_malloc(priv,
1449 pipe_configs[i].type,
1450 dir_in);
1451 }
1452
1453 pipe->mod_private = NULL;
1454 }
1455 }
1456
1457 static int usbhsh_start(struct usbhs_priv *priv)
1458 {
1459 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1460 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1461 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1462 struct device *dev = usbhs_priv_to_dev(priv);
1463 int ret;
1464
1465 /* add hcd */
1466 ret = usb_add_hcd(hcd, 0, 0);
1467 if (ret < 0)
1468 return 0;
1469 device_wakeup_enable(hcd->self.controller);
1470
1471 /*
1472 * pipe initialize and enable DCP
1473 */
1474 usbhs_fifo_init(priv);
1475 usbhs_pipe_init(priv,
1476 usbhsh_dma_map_ctrl);
1477 usbhsh_pipe_init_for_host(priv);
1478
1479 /*
1480 * system config enble
1481 * - HI speed
1482 * - host
1483 * - usb module
1484 */
1485 usbhs_sys_host_ctrl(priv, 1);
1486
1487 /*
1488 * enable irq callback
1489 */
1490 mod->irq_attch = usbhsh_irq_attch;
1491 mod->irq_dtch = usbhsh_irq_dtch;
1492 mod->irq_sack = usbhsh_irq_setup_ack;
1493 mod->irq_sign = usbhsh_irq_setup_err;
1494 usbhs_irq_callback_update(priv, mod);
1495
1496 dev_dbg(dev, "start host\n");
1497
1498 return ret;
1499 }
1500
1501 static int usbhsh_stop(struct usbhs_priv *priv)
1502 {
1503 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1504 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1505 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1506 struct device *dev = usbhs_priv_to_dev(priv);
1507
1508 /*
1509 * disable irq callback
1510 */
1511 mod->irq_attch = NULL;
1512 mod->irq_dtch = NULL;
1513 mod->irq_sack = NULL;
1514 mod->irq_sign = NULL;
1515 usbhs_irq_callback_update(priv, mod);
1516
1517 usb_remove_hcd(hcd);
1518
1519 /* disable sys */
1520 usbhs_sys_host_ctrl(priv, 0);
1521
1522 dev_dbg(dev, "quit host\n");
1523
1524 return 0;
1525 }
1526
1527 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1528 {
1529 struct usbhsh_hpriv *hpriv;
1530 struct usb_hcd *hcd;
1531 struct usbhsh_device *udev;
1532 struct device *dev = usbhs_priv_to_dev(priv);
1533 int i;
1534
1535 /* initialize hcd */
1536 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1537 if (!hcd) {
1538 dev_err(dev, "Failed to create hcd\n");
1539 return -ENOMEM;
1540 }
1541 hcd->has_tt = 1; /* for low/full speed */
1542
1543 /*
1544 * CAUTION
1545 *
1546 * There is no guarantee that it is possible to access usb module here.
1547 * Don't accesses to it.
1548 * The accesse will be enable after "usbhsh_start"
1549 */
1550
1551 hpriv = usbhsh_hcd_to_hpriv(hcd);
1552
1553 /*
1554 * register itself
1555 */
1556 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1557
1558 /* init hpriv */
1559 hpriv->mod.name = "host";
1560 hpriv->mod.start = usbhsh_start;
1561 hpriv->mod.stop = usbhsh_stop;
1562 usbhsh_port_stat_init(hpriv);
1563
1564 /* init all device */
1565 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1566 udev->usbv = NULL;
1567 INIT_LIST_HEAD(&udev->ep_list_head);
1568 }
1569
1570 dev_info(dev, "host probed\n");
1571
1572 return 0;
1573 }
1574
1575 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1576 {
1577 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1578 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1579
1580 usb_put_hcd(hcd);
1581
1582 return 0;
1583 }
Linux with added FPC-III support