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1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8#include <linux/io.h>
9#include <linux/list.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/slab.h>
13#include <linux/usb.h>
14#include <linux/usb/hcd.h>
15#include "common.h"
16
17/*
18 *** HARDWARE LIMITATION ***
19 *
20 * 1) renesas_usbhs has a limited number of controllable devices.
21 * it can control only 9 devices in generally.
22 * see DEVADDn / DCPMAXP / PIPEMAXP.
23 *
24 * 2) renesas_usbhs pipe number is limited.
25 * the pipe will be re-used for each devices.
26 * so, software should control DATA0/1 sequence of each devices.
27 */
28
29
30/*
31 * image of mod_host
32 *
33 * +--------+
34 * | udev 0 | --> it is used when set address
35 * +--------+
36 *
37 * +--------+ pipes are reused for each uep.
38 * | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
39 * +--------+ | | other device requested
40 * +- [uep 1 (bulk)] --|---+ +--------------+
41 * | +--------------> | pipe0 (dcp) |
42 * +- [uep 2 (bulk)] -@ | +--------------+
43 * | | pipe1 (isoc) |
44 * +--------+ | +--------------+
45 * | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) |
46 * +--------+ | +--------------+
47 * +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) |
48 * | | +--------------+
49 * +--------+ +-----|------> | pipe4 (int) |
50 * | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+
51 * +--------+ | | | .... |
52 * +- [uep 1 (bulk)] -@ | | .... |
53 * | |
54 * +- [uep 2 (bulk)]-----------+
55 *
56 * @ : uep requested free pipe, but all have been used.
57 * now it is waiting for free pipe
58 */
59
60
61/*
62 * struct
63 */
64struct usbhsh_request {
65 struct urb *urb;
66 struct usbhs_pkt pkt;
67};
68
69struct usbhsh_device {
70 struct usb_device *usbv;
71 struct list_head ep_list_head; /* list of usbhsh_ep */
72};
73
74struct usbhsh_ep {
75 struct usbhs_pipe *pipe; /* attached pipe */
76 struct usbhsh_device *udev; /* attached udev */
77 struct usb_host_endpoint *ep;
78 struct list_head ep_list; /* list to usbhsh_device */
79 unsigned int counter; /* pipe attach counter */
80};
81
82#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
83#define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */
84struct usbhsh_hpriv {
85 struct usbhs_mod mod;
86 struct usbhs_pipe *dcp;
87
88 struct usbhsh_device udev[USBHSH_DEVICE_MAX];
89
90 u32 port_stat; /* USB_PORT_STAT_xxx */
91
92 struct completion setup_ack_done;
93};
94
95
96static const char usbhsh_hcd_name[] = "renesas_usbhs host";
97
98/*
99 * macro
100 */
101#define usbhsh_priv_to_hpriv(priv) \
102 container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
103
104#define __usbhsh_for_each_udev(start, pos, h, i) \
105 for ((i) = start; \
106 ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i)); \
107 (i)++)
108
109#define usbhsh_for_each_udev(pos, hpriv, i) \
110 __usbhsh_for_each_udev(1, pos, hpriv, i)
111
112#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \
113 __usbhsh_for_each_udev(0, pos, hpriv, i)
114
115#define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv)
116#define usbhsh_hcd_to_dev(h) ((h)->self.controller)
117
118#define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
119#define usbhsh_hpriv_to_dcp(h) ((h)->dcp)
120#define usbhsh_hpriv_to_hcd(h) \
121 container_of((void *)h, struct usb_hcd, hcd_priv)
122
123#define usbhsh_ep_to_uep(u) ((u)->hcpriv)
124#define usbhsh_uep_to_pipe(u) ((u)->pipe)
125#define usbhsh_uep_to_udev(u) ((u)->udev)
126#define usbhsh_uep_to_ep(u) ((u)->ep)
127
128#define usbhsh_urb_to_ureq(u) ((u)->hcpriv)
129#define usbhsh_urb_to_usbv(u) ((u)->dev)
130
131#define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev)
132
133#define usbhsh_udev_to_usbv(h) ((h)->usbv)
134#define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h)
135
136#define usbhsh_pipe_to_uep(p) ((p)->mod_private)
137
138#define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent))
139#define usbhsh_device_hubport(d) ((d)->usbv->portnum)
140#define usbhsh_device_number(h, d) ((int)((d) - (h)->udev))
141#define usbhsh_device_nth(h, d) ((h)->udev + d)
142#define usbhsh_device0(h) usbhsh_device_nth(h, 0)
143
144#define usbhsh_port_stat_init(h) ((h)->port_stat = 0)
145#define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s))
146#define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s))
147#define usbhsh_port_stat_get(h) ((h)->port_stat)
148
149#define usbhsh_pkt_to_ureq(p) \
150 container_of((void *)p, struct usbhsh_request, pkt)
151
152/*
153 * req alloc/free
154 */
155static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
156 struct urb *urb,
157 gfp_t mem_flags)
158{
159 struct usbhsh_request *ureq;
160
161 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
162 if (!ureq)
163 return NULL;
164
165 usbhs_pkt_init(&ureq->pkt);
166 ureq->urb = urb;
167 usbhsh_urb_to_ureq(urb) = ureq;
168
169 return ureq;
170}
171
172static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
173 struct usbhsh_request *ureq)
174{
175 usbhsh_urb_to_ureq(ureq->urb) = NULL;
176 ureq->urb = NULL;
177
178 kfree(ureq);
179}
180
181/*
182 * status
183 */
184static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
185{
186 /*
187 * we can decide some device is attached or not
188 * by checking mod.irq_attch
189 * see
190 * usbhsh_irq_attch()
191 * usbhsh_irq_dtch()
192 */
193 return (hpriv->mod.irq_attch == NULL);
194}
195
196/*
197 * pipe control
198 */
199static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
200 struct urb *urb,
201 struct usbhs_pkt *pkt)
202{
203 int len = urb->actual_length;
204 int maxp = usb_endpoint_maxp(&urb->ep->desc);
205 int t = 0;
206
207 /* DCP is out of sequence control */
208 if (usb_pipecontrol(urb->pipe))
209 return;
210
211 /*
212 * renesas_usbhs pipe has a limitation in a number.
213 * So, driver should re-use the limited pipe for each device/endpoint.
214 * DATA0/1 sequence should be saved for it.
215 * see [image of mod_host]
216 * [HARDWARE LIMITATION]
217 */
218
219 /*
220 * next sequence depends on actual_length
221 *
222 * ex) actual_length = 1147, maxp = 512
223 * data0 : 512
224 * data1 : 512
225 * data0 : 123
226 * data1 is the next sequence
227 */
228 t = len / maxp;
229 if (len % maxp)
230 t++;
231 if (pkt->zero)
232 t++;
233 t %= 2;
234
235 if (t)
236 usb_dotoggle(urb->dev,
237 usb_pipeendpoint(urb->pipe),
238 usb_pipeout(urb->pipe));
239}
240
241static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
242 struct urb *urb);
243
244static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
245 struct urb *urb)
246{
247 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
248 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
249 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
250 struct usbhs_pipe *pipe;
251 struct usb_endpoint_descriptor *desc = &urb->ep->desc;
252 struct device *dev = usbhs_priv_to_dev(priv);
253 unsigned long flags;
254 int dir_in_req = !!usb_pipein(urb->pipe);
255 int is_dcp = usb_endpoint_xfer_control(desc);
256 int i, dir_in;
257 int ret = -EBUSY;
258
259 /******************** spin lock ********************/
260 usbhs_lock(priv, flags);
261
262 /*
263 * if uep has been attached to pipe,
264 * reuse it
265 */
266 if (usbhsh_uep_to_pipe(uep)) {
267 ret = 0;
268 goto usbhsh_pipe_attach_done;
269 }
270
271 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
272
273 /* check pipe type */
274 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
275 continue;
276
277 /* check pipe direction if normal pipe */
278 if (!is_dcp) {
279 dir_in = !!usbhs_pipe_is_dir_in(pipe);
280 if (0 != (dir_in - dir_in_req))
281 continue;
282 }
283
284 /* check pipe is free */
285 if (usbhsh_pipe_to_uep(pipe))
286 continue;
287
288 /*
289 * attach pipe to uep
290 *
291 * usbhs_pipe_config_update() should be called after
292 * usbhs_set_device_config()
293 * see
294 * DCPMAXP/PIPEMAXP
295 */
296 usbhsh_uep_to_pipe(uep) = pipe;
297 usbhsh_pipe_to_uep(pipe) = uep;
298
299 usbhs_pipe_config_update(pipe,
300 usbhsh_device_number(hpriv, udev),
301 usb_endpoint_num(desc),
302 usb_endpoint_maxp(desc));
303
304 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
305 usbhsh_device_number(hpriv, udev),
306 usb_endpoint_num(desc),
307 usbhs_pipe_name(pipe),
308 dir_in_req ? "in" : "out");
309
310 ret = 0;
311 break;
312 }
313
314usbhsh_pipe_attach_done:
315 if (0 == ret)
316 uep->counter++;
317
318 usbhs_unlock(priv, flags);
319 /******************** spin unlock ******************/
320
321 return ret;
322}
323
324static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
325 struct usbhsh_ep *uep)
326{
327 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
328 struct usbhs_pipe *pipe;
329 struct device *dev = usbhs_priv_to_dev(priv);
330 unsigned long flags;
331
332 if (unlikely(!uep)) {
333 dev_err(dev, "no uep\n");
334 return;
335 }
336
337 /******************** spin lock ********************/
338 usbhs_lock(priv, flags);
339
340 pipe = usbhsh_uep_to_pipe(uep);
341
342 if (unlikely(!pipe)) {
343 dev_err(dev, "uep doesn't have pipe\n");
344 } else if (1 == uep->counter--) { /* last user */
345 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
346 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
347
348 /* detach pipe from uep */
349 usbhsh_uep_to_pipe(uep) = NULL;
350 usbhsh_pipe_to_uep(pipe) = NULL;
351
352 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
353 usbhsh_device_number(hpriv, udev),
354 usb_endpoint_num(&ep->desc),
355 usbhs_pipe_name(pipe));
356 }
357
358 usbhs_unlock(priv, flags);
359 /******************** spin unlock ******************/
360}
361
362/*
363 * endpoint control
364 */
365static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
366 struct urb *urb,
367 gfp_t mem_flags)
368{
369 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
370 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
371 struct usb_host_endpoint *ep = urb->ep;
372 struct usbhsh_ep *uep;
373 struct device *dev = usbhs_priv_to_dev(priv);
374 struct usb_endpoint_descriptor *desc = &ep->desc;
375 unsigned long flags;
376
377 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
378 if (!uep)
379 return -ENOMEM;
380
381 /******************** spin lock ********************/
382 usbhs_lock(priv, flags);
383
384 /*
385 * init endpoint
386 */
387 uep->counter = 0;
388 INIT_LIST_HEAD(&uep->ep_list);
389 list_add_tail(&uep->ep_list, &udev->ep_list_head);
390
391 usbhsh_uep_to_udev(uep) = udev;
392 usbhsh_uep_to_ep(uep) = ep;
393 usbhsh_ep_to_uep(ep) = uep;
394
395 usbhs_unlock(priv, flags);
396 /******************** spin unlock ******************/
397
398 dev_dbg(dev, "%s [%d-%d]\n", __func__,
399 usbhsh_device_number(hpriv, udev),
400 usb_endpoint_num(desc));
401
402 return 0;
403}
404
405static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
406 struct usb_host_endpoint *ep)
407{
408 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
409 struct device *dev = usbhs_priv_to_dev(priv);
410 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
411 unsigned long flags;
412
413 if (!uep)
414 return;
415
416 dev_dbg(dev, "%s [%d-%d]\n", __func__,
417 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
418 usb_endpoint_num(&ep->desc));
419
420 if (usbhsh_uep_to_pipe(uep))
421 usbhsh_pipe_detach(hpriv, uep);
422
423 /******************** spin lock ********************/
424 usbhs_lock(priv, flags);
425
426 /* remove this endpoint from udev */
427 list_del_init(&uep->ep_list);
428
429 usbhsh_uep_to_udev(uep) = NULL;
430 usbhsh_uep_to_ep(uep) = NULL;
431 usbhsh_ep_to_uep(ep) = NULL;
432
433 usbhs_unlock(priv, flags);
434 /******************** spin unlock ******************/
435
436 kfree(uep);
437}
438
439static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
440 struct usbhsh_device *udev)
441{
442 struct usbhsh_ep *uep, *next;
443
444 list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
445 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
446}
447
448/*
449 * device control
450 */
451static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
452 struct usbhsh_device *udev)
453{
454 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
455
456 return hcd->self.root_hub == usbv->parent;
457}
458
459static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
460{
461 return !list_empty(&udev->ep_list_head);
462}
463
464static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
465 struct urb *urb)
466{
467 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
468 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
469
470 /* usbhsh_device_attach() is still not called */
471 if (!udev)
472 return NULL;
473
474 /* if it is device0, return it */
475 if (0 == usb_pipedevice(urb->pipe))
476 return usbhsh_device0(hpriv);
477
478 /* return attached device */
479 return udev;
480}
481
482static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
483 struct urb *urb)
484{
485 struct usbhsh_device *udev = NULL;
486 struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
487 struct usbhsh_device *pos;
488 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
489 struct device *dev = usbhsh_hcd_to_dev(hcd);
490 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
491 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
492 unsigned long flags;
493 u16 upphub, hubport;
494 int i;
495
496 /*
497 * This function should be called only while urb is pointing to device0.
498 * It will attach unused usbhsh_device to urb (usbv),
499 * and initialize device0.
500 * You can use usbhsh_device_get() to get "current" udev,
501 * and usbhsh_usbv_to_udev() is for "attached" udev.
502 */
503 if (0 != usb_pipedevice(urb->pipe)) {
504 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
505 return NULL;
506 }
507
508 /******************** spin lock ********************/
509 usbhs_lock(priv, flags);
510
511 /*
512 * find unused device
513 */
514 usbhsh_for_each_udev(pos, hpriv, i) {
515 if (usbhsh_udev_is_used(pos))
516 continue;
517 udev = pos;
518 break;
519 }
520
521 if (udev) {
522 /*
523 * usbhsh_usbv_to_udev()
524 * usbhsh_udev_to_usbv()
525 * will be enable
526 */
527 dev_set_drvdata(&usbv->dev, udev);
528 udev->usbv = usbv;
529 }
530
531 usbhs_unlock(priv, flags);
532 /******************** spin unlock ******************/
533
534 if (!udev) {
535 dev_err(dev, "no free usbhsh_device\n");
536 return NULL;
537 }
538
539 if (usbhsh_device_has_endpoint(udev)) {
540 dev_warn(dev, "udev have old endpoint\n");
541 usbhsh_endpoint_detach_all(hpriv, udev);
542 }
543
544 if (usbhsh_device_has_endpoint(udev0)) {
545 dev_warn(dev, "udev0 have old endpoint\n");
546 usbhsh_endpoint_detach_all(hpriv, udev0);
547 }
548
549 /* uep will be attached */
550 INIT_LIST_HEAD(&udev0->ep_list_head);
551 INIT_LIST_HEAD(&udev->ep_list_head);
552
553 /*
554 * set device0 config
555 */
556 usbhs_set_device_config(priv,
557 0, 0, 0, usbv->speed);
558
559 /*
560 * set new device config
561 */
562 upphub = 0;
563 hubport = 0;
564 if (!usbhsh_connected_to_rhdev(hcd, udev)) {
565 /* if udev is not connected to rhdev, it means parent is Hub */
566 struct usbhsh_device *parent = usbhsh_device_parent(udev);
567
568 upphub = usbhsh_device_number(hpriv, parent);
569 hubport = usbhsh_device_hubport(udev);
570
571 dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
572 upphub, hubport, parent);
573 }
574
575 usbhs_set_device_config(priv,
576 usbhsh_device_number(hpriv, udev),
577 upphub, hubport, usbv->speed);
578
579 dev_dbg(dev, "%s [%d](%p)\n", __func__,
580 usbhsh_device_number(hpriv, udev), udev);
581
582 return udev;
583}
584
585static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
586 struct usbhsh_device *udev)
587{
588 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
589 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
590 struct device *dev = usbhsh_hcd_to_dev(hcd);
591 struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
592 unsigned long flags;
593
594 dev_dbg(dev, "%s [%d](%p)\n", __func__,
595 usbhsh_device_number(hpriv, udev), udev);
596
597 if (usbhsh_device_has_endpoint(udev)) {
598 dev_warn(dev, "udev still have endpoint\n");
599 usbhsh_endpoint_detach_all(hpriv, udev);
600 }
601
602 /*
603 * There is nothing to do if it is device0.
604 * see
605 * usbhsh_device_attach()
606 * usbhsh_device_get()
607 */
608 if (0 == usbhsh_device_number(hpriv, udev))
609 return;
610
611 /******************** spin lock ********************/
612 usbhs_lock(priv, flags);
613
614 /*
615 * usbhsh_usbv_to_udev()
616 * usbhsh_udev_to_usbv()
617 * will be disable
618 */
619 dev_set_drvdata(&usbv->dev, NULL);
620 udev->usbv = NULL;
621
622 usbhs_unlock(priv, flags);
623 /******************** spin unlock ******************/
624}
625
626/*
627 * queue push/pop
628 */
629static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
630{
631 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
632 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
633 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
634 struct urb *urb = ureq->urb;
635 struct device *dev = usbhs_priv_to_dev(priv);
636 int status = 0;
637
638 dev_dbg(dev, "%s\n", __func__);
639
640 if (!urb) {
641 dev_warn(dev, "pkt doesn't have urb\n");
642 return;
643 }
644
645 if (!usbhsh_is_running(hpriv))
646 status = -ESHUTDOWN;
647
648 urb->actual_length = pkt->actual;
649
650 usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
651 usbhsh_ureq_free(hpriv, ureq);
652
653 usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
654
655 usb_hcd_unlink_urb_from_ep(hcd, urb);
656 usb_hcd_giveback_urb(hcd, urb, status);
657}
658
659static int usbhsh_queue_push(struct usb_hcd *hcd,
660 struct urb *urb,
661 gfp_t mem_flags)
662{
663 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
664 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
665 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
666 struct device *dev = usbhsh_hcd_to_dev(hcd);
667 struct usbhsh_request *ureq;
668 void *buf;
669 int len, sequence;
670
671 if (usb_pipeisoc(urb->pipe)) {
672 dev_err(dev, "pipe iso is not supported now\n");
673 return -EIO;
674 }
675
676 /* this ureq will be freed on usbhsh_queue_done() */
677 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
678 if (unlikely(!ureq)) {
679 dev_err(dev, "ureq alloc fail\n");
680 return -ENOMEM;
681 }
682
683 if (usb_pipein(urb->pipe))
684 pipe->handler = &usbhs_fifo_dma_pop_handler;
685 else
686 pipe->handler = &usbhs_fifo_dma_push_handler;
687
688 buf = (void *)(urb->transfer_buffer + urb->actual_length);
689 len = urb->transfer_buffer_length - urb->actual_length;
690
691 sequence = usb_gettoggle(urb->dev,
692 usb_pipeendpoint(urb->pipe),
693 usb_pipeout(urb->pipe));
694
695 dev_dbg(dev, "%s\n", __func__);
696 usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
697 buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
698 sequence);
699
700 usbhs_pkt_start(pipe);
701
702 return 0;
703}
704
705static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
706 struct usbhs_pipe *pipe)
707{
708 struct usbhs_pkt *pkt;
709
710 while (1) {
711 pkt = usbhs_pkt_pop(pipe, NULL);
712 if (!pkt)
713 break;
714
715 /*
716 * if all packet are gone, usbhsh_endpoint_disable()
717 * will be called.
718 * then, attached device/endpoint/pipe will be detached
719 */
720 usbhsh_queue_done(priv, pkt);
721 }
722}
723
724static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
725{
726 struct usbhs_pipe *pos;
727 int i;
728
729 usbhs_for_each_pipe_with_dcp(pos, priv, i)
730 usbhsh_queue_force_pop(priv, pos);
731}
732
733/*
734 * DCP setup stage
735 */
736static int usbhsh_is_request_address(struct urb *urb)
737{
738 struct usb_ctrlrequest *req;
739
740 req = (struct usb_ctrlrequest *)urb->setup_packet;
741
742 if ((DeviceOutRequest == req->bRequestType << 8) &&
743 (USB_REQ_SET_ADDRESS == req->bRequest))
744 return 1;
745 else
746 return 0;
747}
748
749static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
750 struct urb *urb,
751 struct usbhs_pipe *pipe)
752{
753 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
754 struct usb_ctrlrequest req;
755 struct device *dev = usbhs_priv_to_dev(priv);
756
757 /*
758 * wait setup packet ACK
759 * see
760 * usbhsh_irq_setup_ack()
761 * usbhsh_irq_setup_err()
762 */
763 init_completion(&hpriv->setup_ack_done);
764
765 /* copy original request */
766 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
767
768 /*
769 * renesas_usbhs can not use original usb address.
770 * see HARDWARE LIMITATION.
771 * modify usb address here to use attached device.
772 * see usbhsh_device_attach()
773 */
774 if (usbhsh_is_request_address(urb)) {
775 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
776 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
777
778 /* udev is a attached device */
779 req.wValue = usbhsh_device_number(hpriv, udev);
780 dev_dbg(dev, "create new address - %d\n", req.wValue);
781 }
782
783 /* set request */
784 usbhs_usbreq_set_val(priv, &req);
785
786 /*
787 * wait setup packet ACK
788 */
789 wait_for_completion(&hpriv->setup_ack_done);
790
791 dev_dbg(dev, "%s done\n", __func__);
792}
793
794/*
795 * DCP data stage
796 */
797static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
798 struct usbhs_pkt *pkt)
799{
800 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
801 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
802
803 /* this ureq was connected to urb when usbhsh_urb_enqueue() */
804
805 usbhsh_ureq_free(hpriv, ureq);
806}
807
808static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
809 struct urb *urb,
810 struct usbhs_pipe *pipe,
811 gfp_t mem_flags)
812
813{
814 struct usbhsh_request *ureq;
815
816 /* this ureq will be freed on usbhsh_data_stage_packet_done() */
817 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
818 if (unlikely(!ureq))
819 return -ENOMEM;
820
821 if (usb_pipein(urb->pipe))
822 pipe->handler = &usbhs_dcp_data_stage_in_handler;
823 else
824 pipe->handler = &usbhs_dcp_data_stage_out_handler;
825
826 usbhs_pkt_push(pipe, &ureq->pkt,
827 usbhsh_data_stage_packet_done,
828 urb->transfer_buffer,
829 urb->transfer_buffer_length,
830 (urb->transfer_flags & URB_ZERO_PACKET),
831 -1);
832
833 return 0;
834}
835
836/*
837 * DCP status stage
838 */
839static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
840 struct urb *urb,
841 struct usbhs_pipe *pipe,
842 gfp_t mem_flags)
843{
844 struct usbhsh_request *ureq;
845
846 /* This ureq will be freed on usbhsh_queue_done() */
847 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
848 if (unlikely(!ureq))
849 return -ENOMEM;
850
851 if (usb_pipein(urb->pipe))
852 pipe->handler = &usbhs_dcp_status_stage_in_handler;
853 else
854 pipe->handler = &usbhs_dcp_status_stage_out_handler;
855
856 usbhs_pkt_push(pipe, &ureq->pkt,
857 usbhsh_queue_done,
858 NULL,
859 urb->transfer_buffer_length,
860 0, -1);
861
862 return 0;
863}
864
865static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
866 struct urb *urb,
867 gfp_t mflags)
868{
869 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
870 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
871 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
872 struct device *dev = usbhsh_hcd_to_dev(hcd);
873 int ret;
874
875 dev_dbg(dev, "%s\n", __func__);
876
877 /*
878 * setup stage
879 *
880 * usbhsh_send_setup_stage_packet() wait SACK/SIGN
881 */
882 usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
883
884 /*
885 * data stage
886 *
887 * It is pushed only when urb has buffer.
888 */
889 if (urb->transfer_buffer_length) {
890 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
891 if (ret < 0) {
892 dev_err(dev, "data stage failed\n");
893 return ret;
894 }
895 }
896
897 /*
898 * status stage
899 */
900 ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
901 if (ret < 0) {
902 dev_err(dev, "status stage failed\n");
903 return ret;
904 }
905
906 /*
907 * start pushed packets
908 */
909 usbhs_pkt_start(pipe);
910
911 return 0;
912}
913
914/*
915 * dma map functions
916 */
917static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
918 int map)
919{
920 if (map) {
921 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
922 struct urb *urb = ureq->urb;
923
924 /* it can not use scatter/gather */
925 if (urb->num_sgs)
926 return -EINVAL;
927
928 pkt->dma = urb->transfer_dma;
929 if (!pkt->dma)
930 return -EINVAL;
931 }
932
933 return 0;
934}
935
936/*
937 * for hc_driver
938 */
939static int usbhsh_host_start(struct usb_hcd *hcd)
940{
941 return 0;
942}
943
944static void usbhsh_host_stop(struct usb_hcd *hcd)
945{
946}
947
948static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
949 struct urb *urb,
950 gfp_t mem_flags)
951{
952 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
953 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
954 struct device *dev = usbhs_priv_to_dev(priv);
955 struct usb_host_endpoint *ep = urb->ep;
956 struct usbhsh_device *new_udev = NULL;
957 int is_dir_in = usb_pipein(urb->pipe);
958 int ret;
959
960 dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
961
962 if (!usbhsh_is_running(hpriv)) {
963 ret = -EIO;
964 dev_err(dev, "host is not running\n");
965 goto usbhsh_urb_enqueue_error_not_linked;
966 }
967
968 ret = usb_hcd_link_urb_to_ep(hcd, urb);
969 if (ret) {
970 dev_err(dev, "urb link failed\n");
971 goto usbhsh_urb_enqueue_error_not_linked;
972 }
973
974 /*
975 * attach udev if needed
976 * see [image of mod_host]
977 */
978 if (!usbhsh_device_get(hpriv, urb)) {
979 new_udev = usbhsh_device_attach(hpriv, urb);
980 if (!new_udev) {
981 ret = -EIO;
982 dev_err(dev, "device attach failed\n");
983 goto usbhsh_urb_enqueue_error_not_linked;
984 }
985 }
986
987 /*
988 * attach endpoint if needed
989 * see [image of mod_host]
990 */
991 if (!usbhsh_ep_to_uep(ep)) {
992 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
993 if (ret < 0) {
994 dev_err(dev, "endpoint attach failed\n");
995 goto usbhsh_urb_enqueue_error_free_device;
996 }
997 }
998
999 /*
1000 * attach pipe to endpoint
1001 * see [image of mod_host]
1002 */
1003 ret = usbhsh_pipe_attach(hpriv, urb);
1004 if (ret < 0) {
1005 dev_err(dev, "pipe attach failed\n");
1006 goto usbhsh_urb_enqueue_error_free_endpoint;
1007 }
1008
1009 /*
1010 * push packet
1011 */
1012 if (usb_pipecontrol(urb->pipe))
1013 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1014 else
1015 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1016
1017 return ret;
1018
1019usbhsh_urb_enqueue_error_free_endpoint:
1020 usbhsh_endpoint_detach(hpriv, ep);
1021usbhsh_urb_enqueue_error_free_device:
1022 if (new_udev)
1023 usbhsh_device_detach(hpriv, new_udev);
1024usbhsh_urb_enqueue_error_not_linked:
1025
1026 dev_dbg(dev, "%s error\n", __func__);
1027
1028 return ret;
1029}
1030
1031static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1032{
1033 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1034 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1035
1036 if (ureq) {
1037 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1038 struct usbhs_pkt *pkt = &ureq->pkt;
1039
1040 usbhs_pkt_pop(pkt->pipe, pkt);
1041 usbhsh_queue_done(priv, pkt);
1042 }
1043
1044 return 0;
1045}
1046
1047static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1048 struct usb_host_endpoint *ep)
1049{
1050 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1051 struct usbhsh_device *udev;
1052 struct usbhsh_hpriv *hpriv;
1053
1054 /*
1055 * this function might be called manytimes by same hcd/ep
1056 * in-endpoint == out-endpoint if ep == dcp.
1057 */
1058 if (!uep)
1059 return;
1060
1061 udev = usbhsh_uep_to_udev(uep);
1062 hpriv = usbhsh_hcd_to_hpriv(hcd);
1063
1064 usbhsh_endpoint_detach(hpriv, ep);
1065
1066 /*
1067 * if there is no endpoint,
1068 * free device
1069 */
1070 if (!usbhsh_device_has_endpoint(udev))
1071 usbhsh_device_detach(hpriv, udev);
1072}
1073
1074static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1075{
1076 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1077 int roothub_id = 1; /* only 1 root hub */
1078
1079 /*
1080 * does port stat was changed ?
1081 * check USB_PORT_STAT_C_xxx << 16
1082 */
1083 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1084 *buf = (1 << roothub_id);
1085 else
1086 *buf = 0;
1087
1088 return !!(*buf);
1089}
1090
1091static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1092 u16 typeReq, u16 wValue,
1093 u16 wIndex, char *buf, u16 wLength)
1094{
1095 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1096 struct device *dev = usbhs_priv_to_dev(priv);
1097
1098 switch (wValue) {
1099 case C_HUB_OVER_CURRENT:
1100 case C_HUB_LOCAL_POWER:
1101 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1102 return 0;
1103 }
1104
1105 return -EPIPE;
1106}
1107
1108static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1109 u16 typeReq, u16 wValue,
1110 u16 wIndex, char *buf, u16 wLength)
1111{
1112 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1113 struct device *dev = usbhs_priv_to_dev(priv);
1114 int enable = (typeReq == SetPortFeature);
1115 int speed, i, timeout = 128;
1116 int roothub_id = 1; /* only 1 root hub */
1117
1118 /* common error */
1119 if (wIndex > roothub_id || wLength != 0)
1120 return -EPIPE;
1121
1122 /* check wValue */
1123 switch (wValue) {
1124 case USB_PORT_FEAT_POWER:
1125 usbhs_vbus_ctrl(priv, enable);
1126 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1127 break;
1128
1129 case USB_PORT_FEAT_ENABLE:
1130 case USB_PORT_FEAT_SUSPEND:
1131 case USB_PORT_FEAT_C_ENABLE:
1132 case USB_PORT_FEAT_C_SUSPEND:
1133 case USB_PORT_FEAT_C_CONNECTION:
1134 case USB_PORT_FEAT_C_OVER_CURRENT:
1135 case USB_PORT_FEAT_C_RESET:
1136 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1137 break;
1138
1139 case USB_PORT_FEAT_RESET:
1140 if (!enable)
1141 break;
1142
1143 usbhsh_port_stat_clear(hpriv,
1144 USB_PORT_STAT_HIGH_SPEED |
1145 USB_PORT_STAT_LOW_SPEED);
1146
1147 usbhsh_queue_force_pop_all(priv);
1148
1149 usbhs_bus_send_reset(priv);
1150 msleep(20);
1151 usbhs_bus_send_sof_enable(priv);
1152
1153 for (i = 0; i < timeout ; i++) {
1154 switch (usbhs_bus_get_speed(priv)) {
1155 case USB_SPEED_LOW:
1156 speed = USB_PORT_STAT_LOW_SPEED;
1157 goto got_usb_bus_speed;
1158 case USB_SPEED_HIGH:
1159 speed = USB_PORT_STAT_HIGH_SPEED;
1160 goto got_usb_bus_speed;
1161 case USB_SPEED_FULL:
1162 speed = 0;
1163 goto got_usb_bus_speed;
1164 }
1165
1166 msleep(20);
1167 }
1168 return -EPIPE;
1169
1170got_usb_bus_speed:
1171 usbhsh_port_stat_set(hpriv, speed);
1172 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1173
1174 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1175 __func__, speed);
1176
1177 /* status change is not needed */
1178 return 0;
1179
1180 default:
1181 return -EPIPE;
1182 }
1183
1184 /* set/clear status */
1185 if (enable)
1186 usbhsh_port_stat_set(hpriv, (1 << wValue));
1187 else
1188 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1189
1190 return 0;
1191}
1192
1193static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1194 u16 typeReq, u16 wValue,
1195 u16 wIndex, char *buf, u16 wLength)
1196{
1197 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1198 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1199 struct device *dev = usbhs_priv_to_dev(priv);
1200 int roothub_id = 1; /* only 1 root hub */
1201
1202 switch (typeReq) {
1203 case GetHubStatus:
1204 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1205
1206 *buf = 0x00;
1207 break;
1208
1209 case GetPortStatus:
1210 if (wIndex != roothub_id)
1211 return -EPIPE;
1212
1213 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1214 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1215 break;
1216
1217 case GetHubDescriptor:
1218 desc->bDescriptorType = USB_DT_HUB;
1219 desc->bHubContrCurrent = 0;
1220 desc->bNbrPorts = roothub_id;
1221 desc->bDescLength = 9;
1222 desc->bPwrOn2PwrGood = 0;
1223 desc->wHubCharacteristics =
1224 cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1225 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1);
1226 desc->u.hs.DeviceRemovable[1] = ~0;
1227 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1228 break;
1229 }
1230
1231 return 0;
1232}
1233
1234static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1235 u16 wIndex, char *buf, u16 wLength)
1236{
1237 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1238 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1239 struct device *dev = usbhs_priv_to_dev(priv);
1240 int ret = -EPIPE;
1241
1242 switch (typeReq) {
1243
1244 /* Hub Feature */
1245 case ClearHubFeature:
1246 case SetHubFeature:
1247 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1248 wValue, wIndex, buf, wLength);
1249 break;
1250
1251 /* Port Feature */
1252 case SetPortFeature:
1253 case ClearPortFeature:
1254 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1255 wValue, wIndex, buf, wLength);
1256 break;
1257
1258 /* Get status */
1259 case GetHubStatus:
1260 case GetPortStatus:
1261 case GetHubDescriptor:
1262 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1263 wValue, wIndex, buf, wLength);
1264 break;
1265 }
1266
1267 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1268 typeReq, ret, usbhsh_port_stat_get(hpriv));
1269
1270 return ret;
1271}
1272
1273static int usbhsh_bus_nop(struct usb_hcd *hcd)
1274{
1275 /* nothing to do */
1276 return 0;
1277}
1278
1279static const struct hc_driver usbhsh_driver = {
1280 .description = usbhsh_hcd_name,
1281 .hcd_priv_size = sizeof(struct usbhsh_hpriv),
1282
1283 /*
1284 * generic hardware linkage
1285 */
1286 .flags = HCD_DMA | HCD_USB2,
1287
1288 .start = usbhsh_host_start,
1289 .stop = usbhsh_host_stop,
1290
1291 /*
1292 * managing i/o requests and associated device resources
1293 */
1294 .urb_enqueue = usbhsh_urb_enqueue,
1295 .urb_dequeue = usbhsh_urb_dequeue,
1296 .endpoint_disable = usbhsh_endpoint_disable,
1297
1298 /*
1299 * root hub
1300 */
1301 .hub_status_data = usbhsh_hub_status_data,
1302 .hub_control = usbhsh_hub_control,
1303 .bus_suspend = usbhsh_bus_nop,
1304 .bus_resume = usbhsh_bus_nop,
1305};
1306
1307/*
1308 * interrupt functions
1309 */
1310static int usbhsh_irq_attch(struct usbhs_priv *priv,
1311 struct usbhs_irq_state *irq_state)
1312{
1313 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1314 struct device *dev = usbhs_priv_to_dev(priv);
1315
1316 dev_dbg(dev, "device attached\n");
1317
1318 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1319 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1320
1321 /*
1322 * attch interrupt might happen infinitely on some device
1323 * (on self power USB hub ?)
1324 * disable it here.
1325 *
1326 * usbhsh_is_running() becomes effective
1327 * according to this process.
1328 * see
1329 * usbhsh_is_running()
1330 * usbhsh_urb_enqueue()
1331 */
1332 hpriv->mod.irq_attch = NULL;
1333 usbhs_irq_callback_update(priv, &hpriv->mod);
1334
1335 return 0;
1336}
1337
1338static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1339 struct usbhs_irq_state *irq_state)
1340{
1341 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1342 struct device *dev = usbhs_priv_to_dev(priv);
1343
1344 dev_dbg(dev, "device detached\n");
1345
1346 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1347 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1348
1349 /*
1350 * enable attch interrupt again
1351 *
1352 * usbhsh_is_running() becomes invalid
1353 * according to this process.
1354 * see
1355 * usbhsh_is_running()
1356 * usbhsh_urb_enqueue()
1357 */
1358 hpriv->mod.irq_attch = usbhsh_irq_attch;
1359 usbhs_irq_callback_update(priv, &hpriv->mod);
1360
1361 /*
1362 * usbhsh_queue_force_pop_all() should be called
1363 * after usbhsh_is_running() becomes invalid.
1364 */
1365 usbhsh_queue_force_pop_all(priv);
1366
1367 return 0;
1368}
1369
1370static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1371 struct usbhs_irq_state *irq_state)
1372{
1373 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1374 struct device *dev = usbhs_priv_to_dev(priv);
1375
1376 dev_dbg(dev, "setup packet OK\n");
1377
1378 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1379
1380 return 0;
1381}
1382
1383static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1384 struct usbhs_irq_state *irq_state)
1385{
1386 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1387 struct device *dev = usbhs_priv_to_dev(priv);
1388
1389 dev_dbg(dev, "setup packet Err\n");
1390
1391 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1392
1393 return 0;
1394}
1395
1396/*
1397 * module start/stop
1398 */
1399static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1400{
1401 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1402 struct usbhs_pipe *pipe;
1403 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1404 usbhs_get_dparam(priv, pipe_configs);
1405 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1406 int old_type, dir_in, i;
1407
1408 /* init all pipe */
1409 old_type = USB_ENDPOINT_XFER_CONTROL;
1410 for (i = 0; i < pipe_size; i++) {
1411
1412 /*
1413 * data "output" will be finished as soon as possible,
1414 * but there is no guaranty at data "input" case.
1415 *
1416 * "input" needs "standby" pipe.
1417 * So, "input" direction pipe > "output" direction pipe
1418 * is good idea.
1419 *
1420 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1421 * and the other will be input direction here.
1422 *
1423 * ex)
1424 * ...
1425 * USB_ENDPOINT_XFER_ISOC -> dir out
1426 * USB_ENDPOINT_XFER_ISOC -> dir in
1427 * USB_ENDPOINT_XFER_BULK -> dir out
1428 * USB_ENDPOINT_XFER_BULK -> dir in
1429 * USB_ENDPOINT_XFER_BULK -> dir in
1430 * ...
1431 */
1432 dir_in = (pipe_configs[i].type == old_type);
1433 old_type = pipe_configs[i].type;
1434
1435 if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1436 pipe = usbhs_dcp_malloc(priv);
1437 usbhsh_hpriv_to_dcp(hpriv) = pipe;
1438 } else {
1439 pipe = usbhs_pipe_malloc(priv,
1440 pipe_configs[i].type,
1441 dir_in);
1442 }
1443
1444 pipe->mod_private = NULL;
1445 }
1446}
1447
1448static int usbhsh_start(struct usbhs_priv *priv)
1449{
1450 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1451 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1452 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1453 struct device *dev = usbhs_priv_to_dev(priv);
1454 int ret;
1455
1456 /* add hcd */
1457 ret = usb_add_hcd(hcd, 0, 0);
1458 if (ret < 0)
1459 return 0;
1460 device_wakeup_enable(hcd->self.controller);
1461
1462 /*
1463 * pipe initialize and enable DCP
1464 */
1465 usbhs_fifo_init(priv);
1466 usbhs_pipe_init(priv,
1467 usbhsh_dma_map_ctrl);
1468 usbhsh_pipe_init_for_host(priv);
1469
1470 /*
1471 * system config enble
1472 * - HI speed
1473 * - host
1474 * - usb module
1475 */
1476 usbhs_sys_host_ctrl(priv, 1);
1477
1478 /*
1479 * enable irq callback
1480 */
1481 mod->irq_attch = usbhsh_irq_attch;
1482 mod->irq_dtch = usbhsh_irq_dtch;
1483 mod->irq_sack = usbhsh_irq_setup_ack;
1484 mod->irq_sign = usbhsh_irq_setup_err;
1485 usbhs_irq_callback_update(priv, mod);
1486
1487 dev_dbg(dev, "start host\n");
1488
1489 return ret;
1490}
1491
1492static int usbhsh_stop(struct usbhs_priv *priv)
1493{
1494 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1495 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1496 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1497 struct device *dev = usbhs_priv_to_dev(priv);
1498
1499 /*
1500 * disable irq callback
1501 */
1502 mod->irq_attch = NULL;
1503 mod->irq_dtch = NULL;
1504 mod->irq_sack = NULL;
1505 mod->irq_sign = NULL;
1506 usbhs_irq_callback_update(priv, mod);
1507
1508 usb_remove_hcd(hcd);
1509
1510 /* disable sys */
1511 usbhs_sys_host_ctrl(priv, 0);
1512
1513 dev_dbg(dev, "quit host\n");
1514
1515 return 0;
1516}
1517
1518int usbhs_mod_host_probe(struct usbhs_priv *priv)
1519{
1520 struct usbhsh_hpriv *hpriv;
1521 struct usb_hcd *hcd;
1522 struct usbhsh_device *udev;
1523 struct device *dev = usbhs_priv_to_dev(priv);
1524 int i;
1525
1526 /* initialize hcd */
1527 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1528 if (!hcd) {
1529 dev_err(dev, "Failed to create hcd\n");
1530 return -ENOMEM;
1531 }
1532 hcd->has_tt = 1; /* for low/full speed */
1533
1534 /*
1535 * CAUTION
1536 *
1537 * There is no guarantee that it is possible to access usb module here.
1538 * Don't accesses to it.
1539 * The accesse will be enable after "usbhsh_start"
1540 */
1541
1542 hpriv = usbhsh_hcd_to_hpriv(hcd);
1543
1544 /*
1545 * register itself
1546 */
1547 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1548
1549 /* init hpriv */
1550 hpriv->mod.name = "host";
1551 hpriv->mod.start = usbhsh_start;
1552 hpriv->mod.stop = usbhsh_stop;
1553 usbhsh_port_stat_init(hpriv);
1554
1555 /* init all device */
1556 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1557 udev->usbv = NULL;
1558 INIT_LIST_HEAD(&udev->ep_list_head);
1559 }
1560
1561 dev_info(dev, "host probed\n");
1562
1563 return 0;
1564}
1565
1566int usbhs_mod_host_remove(struct usbhs_priv *priv)
1567{
1568 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1569 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1570
1571 usb_put_hcd(hcd);
1572
1573 return 0;
1574}
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}