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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 */
73struct usbhsh_request {
74 struct urb *urb;
75 struct usbhs_pkt pkt;
76};
77
78struct usbhsh_device {
79 struct usb_device *usbv;
80 struct list_head ep_list_head; /* list of usbhsh_ep */
81};
82
83struct 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 */
93struct 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
105static 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 */
164static 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 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
170 struct device *dev = usbhs_priv_to_dev(priv);
171
172 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
173 if (!ureq) {
174 dev_err(dev, "ureq alloc fail\n");
175 return NULL;
176 }
177
178 usbhs_pkt_init(&ureq->pkt);
179 ureq->urb = urb;
180 usbhsh_urb_to_ureq(urb) = ureq;
181
182 return ureq;
183}
184
185static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
186 struct usbhsh_request *ureq)
187{
188 usbhsh_urb_to_ureq(ureq->urb) = NULL;
189 ureq->urb = NULL;
190
191 kfree(ureq);
192}
193
194/*
195 * status
196 */
197static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
198{
199 /*
200 * we can decide some device is attached or not
201 * by checking mod.irq_attch
202 * see
203 * usbhsh_irq_attch()
204 * usbhsh_irq_dtch()
205 */
206 return (hpriv->mod.irq_attch == NULL);
207}
208
209/*
210 * pipe control
211 */
212static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
213 struct urb *urb,
214 struct usbhs_pkt *pkt)
215{
216 int len = urb->actual_length;
217 int maxp = usb_endpoint_maxp(&urb->ep->desc);
218 int t = 0;
219
220 /* DCP is out of sequence control */
221 if (usb_pipecontrol(urb->pipe))
222 return;
223
224 /*
225 * renesas_usbhs pipe has a limitation in a number.
226 * So, driver should re-use the limited pipe for each device/endpoint.
227 * DATA0/1 sequence should be saved for it.
228 * see [image of mod_host]
229 * [HARDWARE LIMITATION]
230 */
231
232 /*
233 * next sequence depends on actual_length
234 *
235 * ex) actual_length = 1147, maxp = 512
236 * data0 : 512
237 * data1 : 512
238 * data0 : 123
239 * data1 is the next sequence
240 */
241 t = len / maxp;
242 if (len % maxp)
243 t++;
244 if (pkt->zero)
245 t++;
246 t %= 2;
247
248 if (t)
249 usb_dotoggle(urb->dev,
250 usb_pipeendpoint(urb->pipe),
251 usb_pipeout(urb->pipe));
252}
253
254static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
255 struct urb *urb);
256
257static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
258 struct urb *urb)
259{
260 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
261 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
262 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
263 struct usbhs_pipe *pipe;
264 struct usb_endpoint_descriptor *desc = &urb->ep->desc;
265 struct device *dev = usbhs_priv_to_dev(priv);
266 unsigned long flags;
267 int dir_in_req = !!usb_pipein(urb->pipe);
268 int is_dcp = usb_endpoint_xfer_control(desc);
269 int i, dir_in;
270 int ret = -EBUSY;
271
272 /******************** spin lock ********************/
273 usbhs_lock(priv, flags);
274
275 /*
276 * if uep has been attached to pipe,
277 * reuse it
278 */
279 if (usbhsh_uep_to_pipe(uep)) {
280 ret = 0;
281 goto usbhsh_pipe_attach_done;
282 }
283
284 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
285
286 /* check pipe type */
287 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
288 continue;
289
290 /* check pipe direction if normal pipe */
291 if (!is_dcp) {
292 dir_in = !!usbhs_pipe_is_dir_in(pipe);
293 if (0 != (dir_in - dir_in_req))
294 continue;
295 }
296
297 /* check pipe is free */
298 if (usbhsh_pipe_to_uep(pipe))
299 continue;
300
301 /*
302 * attach pipe to uep
303 *
304 * usbhs_pipe_config_update() should be called after
305 * usbhs_set_device_config()
306 * see
307 * DCPMAXP/PIPEMAXP
308 */
309 usbhsh_uep_to_pipe(uep) = pipe;
310 usbhsh_pipe_to_uep(pipe) = uep;
311
312 usbhs_pipe_config_update(pipe,
313 usbhsh_device_number(hpriv, udev),
314 usb_endpoint_num(desc),
315 usb_endpoint_maxp(desc));
316
317 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
318 usbhsh_device_number(hpriv, udev),
319 usb_endpoint_num(desc),
320 usbhs_pipe_name(pipe),
321 dir_in_req ? "in" : "out");
322
323 ret = 0;
324 break;
325 }
326
327usbhsh_pipe_attach_done:
328 if (0 == ret)
329 uep->counter++;
330
331 usbhs_unlock(priv, flags);
332 /******************** spin unlock ******************/
333
334 return ret;
335}
336
337static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
338 struct usbhsh_ep *uep)
339{
340 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
341 struct usbhs_pipe *pipe;
342 struct device *dev = usbhs_priv_to_dev(priv);
343 unsigned long flags;
344
345 if (unlikely(!uep)) {
346 dev_err(dev, "no uep\n");
347 return;
348 }
349
350 /******************** spin lock ********************/
351 usbhs_lock(priv, flags);
352
353 pipe = usbhsh_uep_to_pipe(uep);
354
355 if (unlikely(!pipe)) {
356 dev_err(dev, "uep doens't have pipe\n");
357 } else if (1 == uep->counter--) { /* last user */
358 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
359 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
360
361 /* detach pipe from uep */
362 usbhsh_uep_to_pipe(uep) = NULL;
363 usbhsh_pipe_to_uep(pipe) = NULL;
364
365 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
366 usbhsh_device_number(hpriv, udev),
367 usb_endpoint_num(&ep->desc),
368 usbhs_pipe_name(pipe));
369 }
370
371 usbhs_unlock(priv, flags);
372 /******************** spin unlock ******************/
373}
374
375/*
376 * endpoint control
377 */
378static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
379 struct urb *urb,
380 gfp_t mem_flags)
381{
382 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
383 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
384 struct usb_host_endpoint *ep = urb->ep;
385 struct usbhsh_ep *uep;
386 struct device *dev = usbhs_priv_to_dev(priv);
387 struct usb_endpoint_descriptor *desc = &ep->desc;
388 unsigned long flags;
389
390 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
391 if (!uep) {
392 dev_err(dev, "usbhsh_ep alloc fail\n");
393 return -ENOMEM;
394 }
395
396 /******************** spin lock ********************/
397 usbhs_lock(priv, flags);
398
399 /*
400 * init endpoint
401 */
402 uep->counter = 0;
403 INIT_LIST_HEAD(&uep->ep_list);
404 list_add_tail(&uep->ep_list, &udev->ep_list_head);
405
406 usbhsh_uep_to_udev(uep) = udev;
407 usbhsh_uep_to_ep(uep) = ep;
408 usbhsh_ep_to_uep(ep) = uep;
409
410 usbhs_unlock(priv, flags);
411 /******************** spin unlock ******************/
412
413 dev_dbg(dev, "%s [%d-%d]\n", __func__,
414 usbhsh_device_number(hpriv, udev),
415 usb_endpoint_num(desc));
416
417 return 0;
418}
419
420static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
421 struct usb_host_endpoint *ep)
422{
423 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
424 struct device *dev = usbhs_priv_to_dev(priv);
425 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
426 unsigned long flags;
427
428 if (!uep)
429 return;
430
431 dev_dbg(dev, "%s [%d-%d]\n", __func__,
432 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
433 usb_endpoint_num(&ep->desc));
434
435 if (usbhsh_uep_to_pipe(uep))
436 usbhsh_pipe_detach(hpriv, uep);
437
438 /******************** spin lock ********************/
439 usbhs_lock(priv, flags);
440
441 /* remove this endpoint from udev */
442 list_del_init(&uep->ep_list);
443
444 usbhsh_uep_to_udev(uep) = NULL;
445 usbhsh_uep_to_ep(uep) = NULL;
446 usbhsh_ep_to_uep(ep) = NULL;
447
448 usbhs_unlock(priv, flags);
449 /******************** spin unlock ******************/
450
451 kfree(uep);
452}
453
454static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
455 struct usbhsh_device *udev)
456{
457 struct usbhsh_ep *uep, *next;
458
459 list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
460 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
461}
462
463/*
464 * device control
465 */
466static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
467 struct usbhsh_device *udev)
468{
469 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
470
471 return hcd->self.root_hub == usbv->parent;
472}
473
474static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
475{
476 return !list_empty(&udev->ep_list_head);
477}
478
479static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
480 struct urb *urb)
481{
482 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
483 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
484
485 /* usbhsh_device_attach() is still not called */
486 if (!udev)
487 return NULL;
488
489 /* if it is device0, return it */
490 if (0 == usb_pipedevice(urb->pipe))
491 return usbhsh_device0(hpriv);
492
493 /* return attached device */
494 return udev;
495}
496
497static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
498 struct urb *urb)
499{
500 struct usbhsh_device *udev = NULL;
501 struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
502 struct usbhsh_device *pos;
503 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
504 struct device *dev = usbhsh_hcd_to_dev(hcd);
505 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
506 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
507 unsigned long flags;
508 u16 upphub, hubport;
509 int i;
510
511 /*
512 * This function should be called only while urb is pointing to device0.
513 * It will attach unused usbhsh_device to urb (usbv),
514 * and initialize device0.
515 * You can use usbhsh_device_get() to get "current" udev,
516 * and usbhsh_usbv_to_udev() is for "attached" udev.
517 */
518 if (0 != usb_pipedevice(urb->pipe)) {
519 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
520 return NULL;
521 }
522
523 /******************** spin lock ********************/
524 usbhs_lock(priv, flags);
525
526 /*
527 * find unused device
528 */
529 usbhsh_for_each_udev(pos, hpriv, i) {
530 if (usbhsh_udev_is_used(pos))
531 continue;
532 udev = pos;
533 break;
534 }
535
536 if (udev) {
537 /*
538 * usbhsh_usbv_to_udev()
539 * usbhsh_udev_to_usbv()
540 * will be enable
541 */
542 dev_set_drvdata(&usbv->dev, udev);
543 udev->usbv = usbv;
544 }
545
546 usbhs_unlock(priv, flags);
547 /******************** spin unlock ******************/
548
549 if (!udev) {
550 dev_err(dev, "no free usbhsh_device\n");
551 return NULL;
552 }
553
554 if (usbhsh_device_has_endpoint(udev)) {
555 dev_warn(dev, "udev have old endpoint\n");
556 usbhsh_endpoint_detach_all(hpriv, udev);
557 }
558
559 if (usbhsh_device_has_endpoint(udev0)) {
560 dev_warn(dev, "udev0 have old endpoint\n");
561 usbhsh_endpoint_detach_all(hpriv, udev0);
562 }
563
564 /* uep will be attached */
565 INIT_LIST_HEAD(&udev0->ep_list_head);
566 INIT_LIST_HEAD(&udev->ep_list_head);
567
568 /*
569 * set device0 config
570 */
571 usbhs_set_device_config(priv,
572 0, 0, 0, usbv->speed);
573
574 /*
575 * set new device config
576 */
577 upphub = 0;
578 hubport = 0;
579 if (!usbhsh_connected_to_rhdev(hcd, udev)) {
580 /* if udev is not connected to rhdev, it means parent is Hub */
581 struct usbhsh_device *parent = usbhsh_device_parent(udev);
582
583 upphub = usbhsh_device_number(hpriv, parent);
584 hubport = usbhsh_device_hubport(udev);
585
586 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
587 upphub, hubport, parent);
588 }
589
590 usbhs_set_device_config(priv,
591 usbhsh_device_number(hpriv, udev),
592 upphub, hubport, usbv->speed);
593
594 dev_dbg(dev, "%s [%d](%p)\n", __func__,
595 usbhsh_device_number(hpriv, udev), udev);
596
597 return udev;
598}
599
600static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
601 struct usbhsh_device *udev)
602{
603 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
604 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
605 struct device *dev = usbhsh_hcd_to_dev(hcd);
606 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
607 unsigned long flags;
608
609 dev_dbg(dev, "%s [%d](%p)\n", __func__,
610 usbhsh_device_number(hpriv, udev), udev);
611
612 if (usbhsh_device_has_endpoint(udev)) {
613 dev_warn(dev, "udev still have endpoint\n");
614 usbhsh_endpoint_detach_all(hpriv, udev);
615 }
616
617 /*
618 * There is nothing to do if it is device0.
619 * see
620 * usbhsh_device_attach()
621 * usbhsh_device_get()
622 */
623 if (0 == usbhsh_device_number(hpriv, udev))
624 return;
625
626 /******************** spin lock ********************/
627 usbhs_lock(priv, flags);
628
629 /*
630 * usbhsh_usbv_to_udev()
631 * usbhsh_udev_to_usbv()
632 * will be disable
633 */
634 dev_set_drvdata(&usbv->dev, NULL);
635 udev->usbv = NULL;
636
637 usbhs_unlock(priv, flags);
638 /******************** spin unlock ******************/
639}
640
641/*
642 * queue push/pop
643 */
644static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
645{
646 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
647 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
648 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
649 struct urb *urb = ureq->urb;
650 struct device *dev = usbhs_priv_to_dev(priv);
651 int status = 0;
652
653 dev_dbg(dev, "%s\n", __func__);
654
655 if (!urb) {
656 dev_warn(dev, "pkt doesn't have urb\n");
657 return;
658 }
659
660 if (!usbhsh_is_running(hpriv))
661 status = -ESHUTDOWN;
662
663 urb->actual_length = pkt->actual;
664
665 usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
666 usbhsh_ureq_free(hpriv, ureq);
667
668 usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
669
670 usb_hcd_unlink_urb_from_ep(hcd, urb);
671 usb_hcd_giveback_urb(hcd, urb, status);
672}
673
674static int usbhsh_queue_push(struct usb_hcd *hcd,
675 struct urb *urb,
676 gfp_t mem_flags)
677{
678 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
679 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
680 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
681 struct device *dev = usbhsh_hcd_to_dev(hcd);
682 struct usbhsh_request *ureq;
683 void *buf;
684 int len, sequence;
685
686 if (usb_pipeisoc(urb->pipe)) {
687 dev_err(dev, "pipe iso is not supported now\n");
688 return -EIO;
689 }
690
691 /* this ureq will be freed on usbhsh_queue_done() */
692 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
693 if (unlikely(!ureq)) {
694 dev_err(dev, "ureq alloc fail\n");
695 return -ENOMEM;
696 }
697
698 if (usb_pipein(urb->pipe))
699 pipe->handler = &usbhs_fifo_dma_pop_handler;
700 else
701 pipe->handler = &usbhs_fifo_dma_push_handler;
702
703 buf = (void *)(urb->transfer_buffer + urb->actual_length);
704 len = urb->transfer_buffer_length - urb->actual_length;
705
706 sequence = usb_gettoggle(urb->dev,
707 usb_pipeendpoint(urb->pipe),
708 usb_pipeout(urb->pipe));
709
710 dev_dbg(dev, "%s\n", __func__);
711 usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
712 buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
713 sequence);
714
715 usbhs_pkt_start(pipe);
716
717 return 0;
718}
719
720static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
721 struct usbhs_pipe *pipe)
722{
723 struct usbhs_pkt *pkt;
724
725 while (1) {
726 pkt = usbhs_pkt_pop(pipe, NULL);
727 if (!pkt)
728 break;
729
730 /*
731 * if all packet are gone, usbhsh_endpoint_disable()
732 * will be called.
733 * then, attached device/endpoint/pipe will be detached
734 */
735 usbhsh_queue_done(priv, pkt);
736 }
737}
738
739static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
740{
741 struct usbhs_pipe *pos;
742 int i;
743
744 usbhs_for_each_pipe_with_dcp(pos, priv, i)
745 usbhsh_queue_force_pop(priv, pos);
746}
747
748/*
749 * DCP setup stage
750 */
751static int usbhsh_is_request_address(struct urb *urb)
752{
753 struct usb_ctrlrequest *req;
754
755 req = (struct usb_ctrlrequest *)urb->setup_packet;
756
757 if ((DeviceOutRequest == req->bRequestType << 8) &&
758 (USB_REQ_SET_ADDRESS == req->bRequest))
759 return 1;
760 else
761 return 0;
762}
763
764static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
765 struct urb *urb,
766 struct usbhs_pipe *pipe)
767{
768 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
769 struct usb_ctrlrequest req;
770 struct device *dev = usbhs_priv_to_dev(priv);
771
772 /*
773 * wait setup packet ACK
774 * see
775 * usbhsh_irq_setup_ack()
776 * usbhsh_irq_setup_err()
777 */
778 init_completion(&hpriv->setup_ack_done);
779
780 /* copy original request */
781 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
782
783 /*
784 * renesas_usbhs can not use original usb address.
785 * see HARDWARE LIMITATION.
786 * modify usb address here to use attached device.
787 * see usbhsh_device_attach()
788 */
789 if (usbhsh_is_request_address(urb)) {
790 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
791 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
792
793 /* udev is a attached device */
794 req.wValue = usbhsh_device_number(hpriv, udev);
795 dev_dbg(dev, "create new address - %d\n", req.wValue);
796 }
797
798 /* set request */
799 usbhs_usbreq_set_val(priv, &req);
800
801 /*
802 * wait setup packet ACK
803 */
804 wait_for_completion(&hpriv->setup_ack_done);
805
806 dev_dbg(dev, "%s done\n", __func__);
807}
808
809/*
810 * DCP data stage
811 */
812static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
813 struct usbhs_pkt *pkt)
814{
815 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
816 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
817
818 /* this ureq was connected to urb when usbhsh_urb_enqueue() */
819
820 usbhsh_ureq_free(hpriv, ureq);
821}
822
823static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
824 struct urb *urb,
825 struct usbhs_pipe *pipe,
826 gfp_t mem_flags)
827
828{
829 struct usbhsh_request *ureq;
830
831 /* this ureq will be freed on usbhsh_data_stage_packet_done() */
832 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
833 if (unlikely(!ureq))
834 return -ENOMEM;
835
836 if (usb_pipein(urb->pipe))
837 pipe->handler = &usbhs_dcp_data_stage_in_handler;
838 else
839 pipe->handler = &usbhs_dcp_data_stage_out_handler;
840
841 usbhs_pkt_push(pipe, &ureq->pkt,
842 usbhsh_data_stage_packet_done,
843 urb->transfer_buffer,
844 urb->transfer_buffer_length,
845 (urb->transfer_flags & URB_ZERO_PACKET),
846 -1);
847
848 return 0;
849}
850
851/*
852 * DCP status stage
853 */
854static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
855 struct urb *urb,
856 struct usbhs_pipe *pipe,
857 gfp_t mem_flags)
858{
859 struct usbhsh_request *ureq;
860
861 /* This ureq will be freed on usbhsh_queue_done() */
862 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
863 if (unlikely(!ureq))
864 return -ENOMEM;
865
866 if (usb_pipein(urb->pipe))
867 pipe->handler = &usbhs_dcp_status_stage_in_handler;
868 else
869 pipe->handler = &usbhs_dcp_status_stage_out_handler;
870
871 usbhs_pkt_push(pipe, &ureq->pkt,
872 usbhsh_queue_done,
873 NULL,
874 urb->transfer_buffer_length,
875 0, -1);
876
877 return 0;
878}
879
880static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
881 struct urb *urb,
882 gfp_t mflags)
883{
884 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
885 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
886 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
887 struct device *dev = usbhsh_hcd_to_dev(hcd);
888 int ret;
889
890 dev_dbg(dev, "%s\n", __func__);
891
892 /*
893 * setup stage
894 *
895 * usbhsh_send_setup_stage_packet() wait SACK/SIGN
896 */
897 usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
898
899 /*
900 * data stage
901 *
902 * It is pushed only when urb has buffer.
903 */
904 if (urb->transfer_buffer_length) {
905 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
906 if (ret < 0) {
907 dev_err(dev, "data stage failed\n");
908 return ret;
909 }
910 }
911
912 /*
913 * status stage
914 */
915 ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
916 if (ret < 0) {
917 dev_err(dev, "status stage failed\n");
918 return ret;
919 }
920
921 /*
922 * start pushed packets
923 */
924 usbhs_pkt_start(pipe);
925
926 return 0;
927}
928
929/*
930 * dma map functions
931 */
932static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
933{
934 if (map) {
935 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
936 struct urb *urb = ureq->urb;
937
938 /* it can not use scatter/gather */
939 if (urb->num_sgs)
940 return -EINVAL;
941
942 pkt->dma = urb->transfer_dma;
943 if (!pkt->dma)
944 return -EINVAL;
945 }
946
947 return 0;
948}
949
950/*
951 * for hc_driver
952 */
953static int usbhsh_host_start(struct usb_hcd *hcd)
954{
955 return 0;
956}
957
958static void usbhsh_host_stop(struct usb_hcd *hcd)
959{
960}
961
962static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
963 struct urb *urb,
964 gfp_t mem_flags)
965{
966 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
967 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
968 struct device *dev = usbhs_priv_to_dev(priv);
969 struct usb_host_endpoint *ep = urb->ep;
970 struct usbhsh_device *new_udev = NULL;
971 int is_dir_in = usb_pipein(urb->pipe);
972 int ret;
973
974 dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
975
976 if (!usbhsh_is_running(hpriv)) {
977 ret = -EIO;
978 dev_err(dev, "host is not running\n");
979 goto usbhsh_urb_enqueue_error_not_linked;
980 }
981
982 ret = usb_hcd_link_urb_to_ep(hcd, urb);
983 if (ret) {
984 dev_err(dev, "urb link failed\n");
985 goto usbhsh_urb_enqueue_error_not_linked;
986 }
987
988 /*
989 * attach udev if needed
990 * see [image of mod_host]
991 */
992 if (!usbhsh_device_get(hpriv, urb)) {
993 new_udev = usbhsh_device_attach(hpriv, urb);
994 if (!new_udev) {
995 ret = -EIO;
996 dev_err(dev, "device attach failed\n");
997 goto usbhsh_urb_enqueue_error_not_linked;
998 }
999 }
1000
1001 /*
1002 * attach endpoint if needed
1003 * see [image of mod_host]
1004 */
1005 if (!usbhsh_ep_to_uep(ep)) {
1006 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1007 if (ret < 0) {
1008 dev_err(dev, "endpoint attach failed\n");
1009 goto usbhsh_urb_enqueue_error_free_device;
1010 }
1011 }
1012
1013 /*
1014 * attach pipe to endpoint
1015 * see [image of mod_host]
1016 */
1017 ret = usbhsh_pipe_attach(hpriv, urb);
1018 if (ret < 0) {
1019 dev_err(dev, "pipe attach failed\n");
1020 goto usbhsh_urb_enqueue_error_free_endpoint;
1021 }
1022
1023 /*
1024 * push packet
1025 */
1026 if (usb_pipecontrol(urb->pipe))
1027 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1028 else
1029 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1030
1031 return ret;
1032
1033usbhsh_urb_enqueue_error_free_endpoint:
1034 usbhsh_endpoint_detach(hpriv, ep);
1035usbhsh_urb_enqueue_error_free_device:
1036 if (new_udev)
1037 usbhsh_device_detach(hpriv, new_udev);
1038usbhsh_urb_enqueue_error_not_linked:
1039
1040 dev_dbg(dev, "%s error\n", __func__);
1041
1042 return ret;
1043}
1044
1045static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1046{
1047 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1048 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1049
1050 if (ureq) {
1051 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1052 struct usbhs_pkt *pkt = &ureq->pkt;
1053
1054 usbhs_pkt_pop(pkt->pipe, pkt);
1055 usbhsh_queue_done(priv, pkt);
1056 }
1057
1058 return 0;
1059}
1060
1061static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1062 struct usb_host_endpoint *ep)
1063{
1064 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1065 struct usbhsh_device *udev;
1066 struct usbhsh_hpriv *hpriv;
1067
1068 /*
1069 * this function might be called manytimes by same hcd/ep
1070 * in-endpoint == out-endpoint if ep == dcp.
1071 */
1072 if (!uep)
1073 return;
1074
1075 udev = usbhsh_uep_to_udev(uep);
1076 hpriv = usbhsh_hcd_to_hpriv(hcd);
1077
1078 usbhsh_endpoint_detach(hpriv, ep);
1079
1080 /*
1081 * if there is no endpoint,
1082 * free device
1083 */
1084 if (!usbhsh_device_has_endpoint(udev))
1085 usbhsh_device_detach(hpriv, udev);
1086}
1087
1088static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1089{
1090 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1091 int roothub_id = 1; /* only 1 root hub */
1092
1093 /*
1094 * does port stat was changed ?
1095 * check USB_PORT_STAT_C_xxx << 16
1096 */
1097 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1098 *buf = (1 << roothub_id);
1099 else
1100 *buf = 0;
1101
1102 return !!(*buf);
1103}
1104
1105static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1106 u16 typeReq, u16 wValue,
1107 u16 wIndex, char *buf, u16 wLength)
1108{
1109 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1110 struct device *dev = usbhs_priv_to_dev(priv);
1111
1112 switch (wValue) {
1113 case C_HUB_OVER_CURRENT:
1114 case C_HUB_LOCAL_POWER:
1115 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1116 return 0;
1117 }
1118
1119 return -EPIPE;
1120}
1121
1122static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1123 u16 typeReq, u16 wValue,
1124 u16 wIndex, char *buf, u16 wLength)
1125{
1126 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1127 struct device *dev = usbhs_priv_to_dev(priv);
1128 int enable = (typeReq == SetPortFeature);
1129 int speed, i, timeout = 128;
1130 int roothub_id = 1; /* only 1 root hub */
1131
1132 /* common error */
1133 if (wIndex > roothub_id || wLength != 0)
1134 return -EPIPE;
1135
1136 /* check wValue */
1137 switch (wValue) {
1138 case USB_PORT_FEAT_POWER:
1139 usbhs_vbus_ctrl(priv, enable);
1140 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1141 break;
1142
1143 case USB_PORT_FEAT_ENABLE:
1144 case USB_PORT_FEAT_SUSPEND:
1145 case USB_PORT_FEAT_C_ENABLE:
1146 case USB_PORT_FEAT_C_SUSPEND:
1147 case USB_PORT_FEAT_C_CONNECTION:
1148 case USB_PORT_FEAT_C_OVER_CURRENT:
1149 case USB_PORT_FEAT_C_RESET:
1150 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1151 break;
1152
1153 case USB_PORT_FEAT_RESET:
1154 if (!enable)
1155 break;
1156
1157 usbhsh_port_stat_clear(hpriv,
1158 USB_PORT_STAT_HIGH_SPEED |
1159 USB_PORT_STAT_LOW_SPEED);
1160
1161 usbhsh_queue_force_pop_all(priv);
1162
1163 usbhs_bus_send_reset(priv);
1164 msleep(20);
1165 usbhs_bus_send_sof_enable(priv);
1166
1167 for (i = 0; i < timeout ; i++) {
1168 switch (usbhs_bus_get_speed(priv)) {
1169 case USB_SPEED_LOW:
1170 speed = USB_PORT_STAT_LOW_SPEED;
1171 goto got_usb_bus_speed;
1172 case USB_SPEED_HIGH:
1173 speed = USB_PORT_STAT_HIGH_SPEED;
1174 goto got_usb_bus_speed;
1175 case USB_SPEED_FULL:
1176 speed = 0;
1177 goto got_usb_bus_speed;
1178 }
1179
1180 msleep(20);
1181 }
1182 return -EPIPE;
1183
1184got_usb_bus_speed:
1185 usbhsh_port_stat_set(hpriv, speed);
1186 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1187
1188 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1189 __func__, speed);
1190
1191 /* status change is not needed */
1192 return 0;
1193
1194 default:
1195 return -EPIPE;
1196 }
1197
1198 /* set/clear status */
1199 if (enable)
1200 usbhsh_port_stat_set(hpriv, (1 << wValue));
1201 else
1202 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1203
1204 return 0;
1205}
1206
1207static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1208 u16 typeReq, u16 wValue,
1209 u16 wIndex, char *buf, u16 wLength)
1210{
1211 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1212 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1213 struct device *dev = usbhs_priv_to_dev(priv);
1214 int roothub_id = 1; /* only 1 root hub */
1215
1216 switch (typeReq) {
1217 case GetHubStatus:
1218 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1219
1220 *buf = 0x00;
1221 break;
1222
1223 case GetPortStatus:
1224 if (wIndex != roothub_id)
1225 return -EPIPE;
1226
1227 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1228 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1229 break;
1230
1231 case GetHubDescriptor:
1232 desc->bDescriptorType = USB_DT_HUB;
1233 desc->bHubContrCurrent = 0;
1234 desc->bNbrPorts = roothub_id;
1235 desc->bDescLength = 9;
1236 desc->bPwrOn2PwrGood = 0;
1237 desc->wHubCharacteristics =
1238 cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1239 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1);
1240 desc->u.hs.DeviceRemovable[1] = ~0;
1241 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1242 break;
1243 }
1244
1245 return 0;
1246}
1247
1248static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1249 u16 wIndex, char *buf, u16 wLength)
1250{
1251 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1252 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1253 struct device *dev = usbhs_priv_to_dev(priv);
1254 int ret = -EPIPE;
1255
1256 switch (typeReq) {
1257
1258 /* Hub Feature */
1259 case ClearHubFeature:
1260 case SetHubFeature:
1261 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1262 wValue, wIndex, buf, wLength);
1263 break;
1264
1265 /* Port Feature */
1266 case SetPortFeature:
1267 case ClearPortFeature:
1268 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1269 wValue, wIndex, buf, wLength);
1270 break;
1271
1272 /* Get status */
1273 case GetHubStatus:
1274 case GetPortStatus:
1275 case GetHubDescriptor:
1276 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1277 wValue, wIndex, buf, wLength);
1278 break;
1279 }
1280
1281 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1282 typeReq, ret, usbhsh_port_stat_get(hpriv));
1283
1284 return ret;
1285}
1286
1287static int usbhsh_bus_nop(struct usb_hcd *hcd)
1288{
1289 /* nothing to do */
1290 return 0;
1291}
1292
1293static struct hc_driver usbhsh_driver = {
1294 .description = usbhsh_hcd_name,
1295 .hcd_priv_size = sizeof(struct usbhsh_hpriv),
1296
1297 /*
1298 * generic hardware linkage
1299 */
1300 .flags = HCD_USB2,
1301
1302 .start = usbhsh_host_start,
1303 .stop = usbhsh_host_stop,
1304
1305 /*
1306 * managing i/o requests and associated device resources
1307 */
1308 .urb_enqueue = usbhsh_urb_enqueue,
1309 .urb_dequeue = usbhsh_urb_dequeue,
1310 .endpoint_disable = usbhsh_endpoint_disable,
1311
1312 /*
1313 * root hub
1314 */
1315 .hub_status_data = usbhsh_hub_status_data,
1316 .hub_control = usbhsh_hub_control,
1317 .bus_suspend = usbhsh_bus_nop,
1318 .bus_resume = usbhsh_bus_nop,
1319};
1320
1321/*
1322 * interrupt functions
1323 */
1324static int usbhsh_irq_attch(struct usbhs_priv *priv,
1325 struct usbhs_irq_state *irq_state)
1326{
1327 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1328 struct device *dev = usbhs_priv_to_dev(priv);
1329
1330 dev_dbg(dev, "device attached\n");
1331
1332 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1333 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1334
1335 /*
1336 * attch interrupt might happen infinitely on some device
1337 * (on self power USB hub ?)
1338 * disable it here.
1339 *
1340 * usbhsh_is_running() becomes effective
1341 * according to this process.
1342 * see
1343 * usbhsh_is_running()
1344 * usbhsh_urb_enqueue()
1345 */
1346 hpriv->mod.irq_attch = NULL;
1347 usbhs_irq_callback_update(priv, &hpriv->mod);
1348
1349 return 0;
1350}
1351
1352static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1353 struct usbhs_irq_state *irq_state)
1354{
1355 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1356 struct device *dev = usbhs_priv_to_dev(priv);
1357
1358 dev_dbg(dev, "device detached\n");
1359
1360 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1361 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1362
1363 /*
1364 * enable attch interrupt again
1365 *
1366 * usbhsh_is_running() becomes invalid
1367 * according to this process.
1368 * see
1369 * usbhsh_is_running()
1370 * usbhsh_urb_enqueue()
1371 */
1372 hpriv->mod.irq_attch = usbhsh_irq_attch;
1373 usbhs_irq_callback_update(priv, &hpriv->mod);
1374
1375 /*
1376 * usbhsh_queue_force_pop_all() should be called
1377 * after usbhsh_is_running() becomes invalid.
1378 */
1379 usbhsh_queue_force_pop_all(priv);
1380
1381 return 0;
1382}
1383
1384static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1385 struct usbhs_irq_state *irq_state)
1386{
1387 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1388 struct device *dev = usbhs_priv_to_dev(priv);
1389
1390 dev_dbg(dev, "setup packet OK\n");
1391
1392 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1393
1394 return 0;
1395}
1396
1397static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1398 struct usbhs_irq_state *irq_state)
1399{
1400 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1401 struct device *dev = usbhs_priv_to_dev(priv);
1402
1403 dev_dbg(dev, "setup packet Err\n");
1404
1405 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1406
1407 return 0;
1408}
1409
1410/*
1411 * module start/stop
1412 */
1413static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1414{
1415 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1416 struct usbhs_pipe *pipe;
1417 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1418 usbhs_get_dparam(priv, pipe_configs);
1419 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1420 int old_type, dir_in, i;
1421
1422 /* init all pipe */
1423 old_type = USB_ENDPOINT_XFER_CONTROL;
1424 for (i = 0; i < pipe_size; i++) {
1425
1426 /*
1427 * data "output" will be finished as soon as possible,
1428 * but there is no guaranty at data "input" case.
1429 *
1430 * "input" needs "standby" pipe.
1431 * So, "input" direction pipe > "output" direction pipe
1432 * is good idea.
1433 *
1434 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1435 * and the other will be input direction here.
1436 *
1437 * ex)
1438 * ...
1439 * USB_ENDPOINT_XFER_ISOC -> dir out
1440 * USB_ENDPOINT_XFER_ISOC -> dir in
1441 * USB_ENDPOINT_XFER_BULK -> dir out
1442 * USB_ENDPOINT_XFER_BULK -> dir in
1443 * USB_ENDPOINT_XFER_BULK -> dir in
1444 * ...
1445 */
1446 dir_in = (pipe_configs[i].type == old_type);
1447 old_type = pipe_configs[i].type;
1448
1449 if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1450 pipe = usbhs_dcp_malloc(priv);
1451 usbhsh_hpriv_to_dcp(hpriv) = pipe;
1452 } else {
1453 pipe = usbhs_pipe_malloc(priv,
1454 pipe_configs[i].type,
1455 dir_in);
1456 }
1457
1458 pipe->mod_private = NULL;
1459 }
1460}
1461
1462static int usbhsh_start(struct usbhs_priv *priv)
1463{
1464 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1465 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1466 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1467 struct device *dev = usbhs_priv_to_dev(priv);
1468 int ret;
1469
1470 /* add hcd */
1471 ret = usb_add_hcd(hcd, 0, 0);
1472 if (ret < 0)
1473 return 0;
1474 device_wakeup_enable(hcd->self.controller);
1475
1476 /*
1477 * pipe initialize and enable DCP
1478 */
1479 usbhs_fifo_init(priv);
1480 usbhs_pipe_init(priv,
1481 usbhsh_dma_map_ctrl);
1482 usbhsh_pipe_init_for_host(priv);
1483
1484 /*
1485 * system config enble
1486 * - HI speed
1487 * - host
1488 * - usb module
1489 */
1490 usbhs_sys_host_ctrl(priv, 1);
1491
1492 /*
1493 * enable irq callback
1494 */
1495 mod->irq_attch = usbhsh_irq_attch;
1496 mod->irq_dtch = usbhsh_irq_dtch;
1497 mod->irq_sack = usbhsh_irq_setup_ack;
1498 mod->irq_sign = usbhsh_irq_setup_err;
1499 usbhs_irq_callback_update(priv, mod);
1500
1501 dev_dbg(dev, "start host\n");
1502
1503 return ret;
1504}
1505
1506static int usbhsh_stop(struct usbhs_priv *priv)
1507{
1508 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1509 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1510 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1511 struct device *dev = usbhs_priv_to_dev(priv);
1512
1513 /*
1514 * disable irq callback
1515 */
1516 mod->irq_attch = NULL;
1517 mod->irq_dtch = NULL;
1518 mod->irq_sack = NULL;
1519 mod->irq_sign = NULL;
1520 usbhs_irq_callback_update(priv, mod);
1521
1522 usb_remove_hcd(hcd);
1523
1524 /* disable sys */
1525 usbhs_sys_host_ctrl(priv, 0);
1526
1527 dev_dbg(dev, "quit host\n");
1528
1529 return 0;
1530}
1531
1532int usbhs_mod_host_probe(struct usbhs_priv *priv)
1533{
1534 struct usbhsh_hpriv *hpriv;
1535 struct usb_hcd *hcd;
1536 struct usbhsh_device *udev;
1537 struct device *dev = usbhs_priv_to_dev(priv);
1538 int i;
1539
1540 /* initialize hcd */
1541 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1542 if (!hcd) {
1543 dev_err(dev, "Failed to create hcd\n");
1544 return -ENOMEM;
1545 }
1546 hcd->has_tt = 1; /* for low/full speed */
1547
1548 /*
1549 * CAUTION
1550 *
1551 * There is no guarantee that it is possible to access usb module here.
1552 * Don't accesses to it.
1553 * The accesse will be enable after "usbhsh_start"
1554 */
1555
1556 hpriv = usbhsh_hcd_to_hpriv(hcd);
1557
1558 /*
1559 * register itself
1560 */
1561 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1562
1563 /* init hpriv */
1564 hpriv->mod.name = "host";
1565 hpriv->mod.start = usbhsh_start;
1566 hpriv->mod.stop = usbhsh_stop;
1567 usbhsh_port_stat_init(hpriv);
1568
1569 /* init all device */
1570 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1571 udev->usbv = NULL;
1572 INIT_LIST_HEAD(&udev->ep_list_head);
1573 }
1574
1575 dev_info(dev, "host probed\n");
1576
1577 return 0;
1578}
1579
1580int usbhs_mod_host_remove(struct usbhs_priv *priv)
1581{
1582 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1583 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1584
1585 usb_put_hcd(hcd);
1586
1587 return 0;
1588}
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 */
73struct usbhsh_request {
74 struct urb *urb;
75 struct usbhs_pkt pkt;
76};
77
78struct usbhsh_device {
79 struct usb_device *usbv;
80 struct list_head ep_list_head; /* list of usbhsh_ep */
81};
82
83struct 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 */
93struct 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
105static 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 */
164static 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
181static 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 */
193static 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 */
208static 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
250static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
251 struct urb *urb);
252
253static 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
323usbhsh_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
333static 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 */
374static 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
414static 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
448static 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 */
460static 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
468static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
469{
470 return !list_empty(&udev->ep_list_head);
471}
472
473static 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
491static 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 connecte 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
594static 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 */
638static 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
668static 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
714static 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
733static 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 */
745static 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
758static 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 */
806static 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
817static 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 */
848static 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
874static 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 */
926static 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 */
948static int usbhsh_host_start(struct usb_hcd *hcd)
949{
950 return 0;
951}
952
953static void usbhsh_host_stop(struct usb_hcd *hcd)
954{
955}
956
957static 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
1028usbhsh_urb_enqueue_error_free_endpoint:
1029 usbhsh_endpoint_detach(hpriv, ep);
1030usbhsh_urb_enqueue_error_free_device:
1031 if (new_udev)
1032 usbhsh_device_detach(hpriv, new_udev);
1033usbhsh_urb_enqueue_error_not_linked:
1034
1035 dev_dbg(dev, "%s error\n", __func__);
1036
1037 return ret;
1038}
1039
1040static 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
1056static 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
1083static 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
1100static 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
1117static 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
1179got_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
1202static 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
1243static 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
1282static int usbhsh_bus_nop(struct usb_hcd *hcd)
1283{
1284 /* nothing to do */
1285 return 0;
1286}
1287
1288static 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 */
1319static 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
1347static 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
1379static 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
1392static 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 */
1408static 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
1457static 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
1501static 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
1527int 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
1575int 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}