Merge tag 'fixes-for-v3.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[~shefty/rdma-dev.git] / drivers / usb / renesas_usbhs / mod_host.c
1 /*
2  * Renesas USB driver
3  *
4  * Copyright (C) 2011 Renesas Solutions Corp.
5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
15  *
16  */
17 #include <linux/io.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23 #include <linux/usb/hcd.h>
24 #include "common.h"
25
26 /*
27  *** HARDWARE LIMITATION ***
28  *
29  * 1) renesas_usbhs has a limited number of controllable devices.
30  *    it can control only 9 devices in generally.
31  *      see DEVADDn / DCPMAXP / PIPEMAXP.
32  *
33  * 2) renesas_usbhs pipe number is limited.
34  *    the pipe will be re-used for each devices.
35  *    so, software should control DATA0/1 sequence of each devices.
36  */
37
38
39 /*
40  *              image of mod_host
41  *
42  * +--------+
43  * | udev 0 | --> it is used when set address
44  * +--------+
45  *
46  * +--------+                                   pipes are reused for each uep.
47  * | udev 1 |-+- [uep 0 (dcp) ] --+             pipe will be switched when
48  * +--------+ |                   |             other device requested
49  *            +- [uep 1 (bulk)] --|---+            +--------------+
50  *            |                   +--------------> | pipe0 (dcp)  |
51  *            +- [uep 2 (bulk)] -@    |            +--------------+
52  *                                    |            | pipe1 (isoc) |
53  * +--------+                         |            +--------------+
54  * | udev 2 |-+- [uep 0 (dcp) ] -@    +----------> | pipe2 (bulk) |
55  * +--------+ |                                    +--------------+
56  *            +- [uep 1 (int) ] ----+     +------> | pipe3 (bulk) |
57  *                                  |     |        +--------------+
58  * +--------+                       +-----|------> | pipe4 (int)  |
59  * | udev 3 |-+- [uep 0 (dcp) ] -@        |        +--------------+
60  * +--------+ |                           |        | ....         |
61  *            +- [uep 1 (bulk)] -@        |        | ....         |
62  *            |                           |
63  *            +- [uep 2 (bulk)]-----------+
64  *
65  * @ :  uep requested free pipe, but all have been used.
66  *      now it is waiting for free pipe
67  */
68
69
70 /*
71  *              struct
72  */
73 struct usbhsh_request {
74         struct urb              *urb;
75         struct usbhs_pkt        pkt;
76 };
77
78 struct usbhsh_device {
79         struct usb_device       *usbv;
80         struct list_head        ep_list_head; /* list of usbhsh_ep */
81 };
82
83 struct usbhsh_ep {
84         struct usbhs_pipe       *pipe;   /* attached pipe */
85         struct usbhsh_device    *udev;   /* attached udev */
86         struct usb_host_endpoint *ep;
87         struct list_head        ep_list; /* list to usbhsh_device */
88         unsigned int            counter; /* pipe attach counter */
89 };
90
91 #define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
92 #define USBHSH_PORT_MAX          7 /* see DEVADDn :: HUBPORT */
93 struct usbhsh_hpriv {
94         struct usbhs_mod        mod;
95         struct usbhs_pipe       *dcp;
96
97         struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
98
99         u32     port_stat;      /* USB_PORT_STAT_xxx */
100
101         struct completion       setup_ack_done;
102 };
103
104
105 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
106
107 /*
108  *              macro
109  */
110 #define usbhsh_priv_to_hpriv(priv) \
111         container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
112
113 #define __usbhsh_for_each_udev(start, pos, h, i)        \
114         for (i = start, pos = (h)->udev + i;            \
115              i < USBHSH_DEVICE_MAX;                     \
116              i++, pos = (h)->udev + i)
117
118 #define usbhsh_for_each_udev(pos, hpriv, i)     \
119         __usbhsh_for_each_udev(1, pos, hpriv, i)
120
121 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)   \
122         __usbhsh_for_each_udev(0, pos, hpriv, i)
123
124 #define usbhsh_hcd_to_hpriv(h)  (struct usbhsh_hpriv *)((h)->hcd_priv)
125 #define usbhsh_hcd_to_dev(h)    ((h)->self.controller)
126
127 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
128 #define usbhsh_hpriv_to_dcp(h)  ((h)->dcp)
129 #define usbhsh_hpriv_to_hcd(h)  \
130         container_of((void *)h, struct usb_hcd, hcd_priv)
131
132 #define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
133 #define usbhsh_uep_to_pipe(u)   ((u)->pipe)
134 #define usbhsh_uep_to_udev(u)   ((u)->udev)
135 #define usbhsh_uep_to_ep(u)     ((u)->ep)
136
137 #define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
138 #define usbhsh_urb_to_usbv(u)   ((u)->dev)
139
140 #define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
141
142 #define usbhsh_udev_to_usbv(h)  ((h)->usbv)
143 #define usbhsh_udev_is_used(h)  usbhsh_udev_to_usbv(h)
144
145 #define usbhsh_pipe_to_uep(p)   ((p)->mod_private)
146
147 #define usbhsh_device_parent(d)         (usbhsh_usbv_to_udev((d)->usbv->parent))
148 #define usbhsh_device_hubport(d)        ((d)->usbv->portnum)
149 #define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
150 #define usbhsh_device_nth(h, d)         ((h)->udev + d)
151 #define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
152
153 #define usbhsh_port_stat_init(h)        ((h)->port_stat = 0)
154 #define usbhsh_port_stat_set(h, s)      ((h)->port_stat |= (s))
155 #define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
156 #define usbhsh_port_stat_get(h)         ((h)->port_stat)
157
158 #define usbhsh_pkt_to_ureq(p)   \
159         container_of((void *)p, struct usbhsh_request, pkt)
160
161 /*
162  *              req alloc/free
163  */
164 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
165                                                struct urb *urb,
166                                                gfp_t mem_flags)
167 {
168         struct usbhsh_request *ureq;
169         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
185 static 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  */
197 static 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  */
212 static 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
254 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
255                                                struct urb *urb);
256
257 static 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
327 usbhsh_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
337 static 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  */
378 static 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
420 static 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
454 static 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  */
466 static 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
474 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
475 {
476         return !list_empty(&udev->ep_list_head);
477 }
478
479 static 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
497 static 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
600 static 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  */
644 static 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
674 static 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
720 static 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
739 static 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  */
751 static 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
764 static 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  */
812 static 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
823 static 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  */
854 static 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
880 static 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  */
932 static 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  */
953 static int usbhsh_host_start(struct usb_hcd *hcd)
954 {
955         return 0;
956 }
957
958 static void usbhsh_host_stop(struct usb_hcd *hcd)
959 {
960 }
961
962 static 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
1033 usbhsh_urb_enqueue_error_free_endpoint:
1034         usbhsh_endpoint_detach(hpriv, ep);
1035 usbhsh_urb_enqueue_error_free_device:
1036         if (new_udev)
1037                 usbhsh_device_detach(hpriv, new_udev);
1038 usbhsh_urb_enqueue_error_not_linked:
1039
1040         dev_dbg(dev, "%s error\n", __func__);
1041
1042         return ret;
1043 }
1044
1045 static 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
1061 static 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
1088 static 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
1105 static 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
1122 static 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
1184 got_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
1207 static 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           = 0x29;
1233                 desc->bHubContrCurrent          = 0;
1234                 desc->bNbrPorts                 = roothub_id;
1235                 desc->bDescLength               = 9;
1236                 desc->bPwrOn2PwrGood            = 0;
1237                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1238                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1239                 desc->u.hs.DeviceRemovable[1]   = ~0;
1240                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1241                 break;
1242         }
1243
1244         return 0;
1245 }
1246
1247 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1248                               u16 wIndex, char *buf, u16 wLength)
1249 {
1250         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1251         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1252         struct device *dev = usbhs_priv_to_dev(priv);
1253         int ret = -EPIPE;
1254
1255         switch (typeReq) {
1256
1257         /* Hub Feature */
1258         case ClearHubFeature:
1259         case SetHubFeature:
1260                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1261                                                wValue, wIndex, buf, wLength);
1262                 break;
1263
1264         /* Port Feature */
1265         case SetPortFeature:
1266         case ClearPortFeature:
1267                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1268                                                 wValue, wIndex, buf, wLength);
1269                 break;
1270
1271         /* Get status */
1272         case GetHubStatus:
1273         case GetPortStatus:
1274         case GetHubDescriptor:
1275                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1276                                               wValue, wIndex, buf, wLength);
1277                 break;
1278         }
1279
1280         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1281                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1282
1283         return ret;
1284 }
1285
1286 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1287 {
1288         /* nothing to do */
1289         return 0;
1290 }
1291
1292 static struct hc_driver usbhsh_driver = {
1293         .description =          usbhsh_hcd_name,
1294         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1295
1296         /*
1297          * generic hardware linkage
1298          */
1299         .flags =                HCD_USB2,
1300
1301         .start =                usbhsh_host_start,
1302         .stop =                 usbhsh_host_stop,
1303
1304         /*
1305          * managing i/o requests and associated device resources
1306          */
1307         .urb_enqueue =          usbhsh_urb_enqueue,
1308         .urb_dequeue =          usbhsh_urb_dequeue,
1309         .endpoint_disable =     usbhsh_endpoint_disable,
1310
1311         /*
1312          * root hub
1313          */
1314         .hub_status_data =      usbhsh_hub_status_data,
1315         .hub_control =          usbhsh_hub_control,
1316         .bus_suspend =          usbhsh_bus_nop,
1317         .bus_resume =           usbhsh_bus_nop,
1318 };
1319
1320 /*
1321  *              interrupt functions
1322  */
1323 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1324                             struct usbhs_irq_state *irq_state)
1325 {
1326         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1327         struct device *dev = usbhs_priv_to_dev(priv);
1328
1329         dev_dbg(dev, "device attached\n");
1330
1331         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1332         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1333
1334         /*
1335          * attch interrupt might happen infinitely on some device
1336          * (on self power USB hub ?)
1337          * disable it here.
1338          *
1339          * usbhsh_is_running() becomes effective
1340          * according to this process.
1341          * see
1342          *      usbhsh_is_running()
1343          *      usbhsh_urb_enqueue()
1344          */
1345         hpriv->mod.irq_attch = NULL;
1346         usbhs_irq_callback_update(priv, &hpriv->mod);
1347
1348         return 0;
1349 }
1350
1351 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1352                            struct usbhs_irq_state *irq_state)
1353 {
1354         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1355         struct device *dev = usbhs_priv_to_dev(priv);
1356
1357         dev_dbg(dev, "device detached\n");
1358
1359         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1360         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1361
1362         /*
1363          * enable attch interrupt again
1364          *
1365          * usbhsh_is_running() becomes invalid
1366          * according to this process.
1367          * see
1368          *      usbhsh_is_running()
1369          *      usbhsh_urb_enqueue()
1370          */
1371         hpriv->mod.irq_attch = usbhsh_irq_attch;
1372         usbhs_irq_callback_update(priv, &hpriv->mod);
1373
1374         /*
1375          * usbhsh_queue_force_pop_all() should be called
1376          * after usbhsh_is_running() becomes invalid.
1377          */
1378         usbhsh_queue_force_pop_all(priv);
1379
1380         return 0;
1381 }
1382
1383 static int usbhsh_irq_setup_ack(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 OK\n");
1390
1391         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1392
1393         return 0;
1394 }
1395
1396 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1397                                 struct usbhs_irq_state *irq_state)
1398 {
1399         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1400         struct device *dev = usbhs_priv_to_dev(priv);
1401
1402         dev_dbg(dev, "setup packet Err\n");
1403
1404         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1405
1406         return 0;
1407 }
1408
1409 /*
1410  *              module start/stop
1411  */
1412 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1413 {
1414         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1415         struct usbhs_pipe *pipe;
1416         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1417         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1418         int old_type, dir_in, i;
1419
1420         /* init all pipe */
1421         old_type = USB_ENDPOINT_XFER_CONTROL;
1422         for (i = 0; i < pipe_size; i++) {
1423
1424                 /*
1425                  * data "output" will be finished as soon as possible,
1426                  * but there is no guaranty at data "input" case.
1427                  *
1428                  * "input" needs "standby" pipe.
1429                  * So, "input" direction pipe > "output" direction pipe
1430                  * is good idea.
1431                  *
1432                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1433                  * and the other will be input direction here.
1434                  *
1435                  * ex)
1436                  * ...
1437                  * USB_ENDPOINT_XFER_ISOC -> dir out
1438                  * USB_ENDPOINT_XFER_ISOC -> dir in
1439                  * USB_ENDPOINT_XFER_BULK -> dir out
1440                  * USB_ENDPOINT_XFER_BULK -> dir in
1441                  * USB_ENDPOINT_XFER_BULK -> dir in
1442                  * ...
1443                  */
1444                 dir_in = (pipe_type[i] == old_type);
1445                 old_type = pipe_type[i];
1446
1447                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1448                         pipe = usbhs_dcp_malloc(priv);
1449                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1450                 } else {
1451                         pipe = usbhs_pipe_malloc(priv,
1452                                                  pipe_type[i],
1453                                                  dir_in);
1454                 }
1455
1456                 pipe->mod_private = NULL;
1457         }
1458 }
1459
1460 static int usbhsh_start(struct usbhs_priv *priv)
1461 {
1462         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1463         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1464         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1465         struct device *dev = usbhs_priv_to_dev(priv);
1466         int ret;
1467
1468         /* add hcd */
1469         ret = usb_add_hcd(hcd, 0, 0);
1470         if (ret < 0)
1471                 return 0;
1472
1473         /*
1474          * pipe initialize and enable DCP
1475          */
1476         usbhs_pipe_init(priv,
1477                         usbhsh_dma_map_ctrl);
1478         usbhs_fifo_init(priv);
1479         usbhsh_pipe_init_for_host(priv);
1480
1481         /*
1482          * system config enble
1483          * - HI speed
1484          * - host
1485          * - usb module
1486          */
1487         usbhs_sys_host_ctrl(priv, 1);
1488
1489         /*
1490          * enable irq callback
1491          */
1492         mod->irq_attch          = usbhsh_irq_attch;
1493         mod->irq_dtch           = usbhsh_irq_dtch;
1494         mod->irq_sack           = usbhsh_irq_setup_ack;
1495         mod->irq_sign           = usbhsh_irq_setup_err;
1496         usbhs_irq_callback_update(priv, mod);
1497
1498         dev_dbg(dev, "start host\n");
1499
1500         return ret;
1501 }
1502
1503 static int usbhsh_stop(struct usbhs_priv *priv)
1504 {
1505         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1506         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1507         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1508         struct device *dev = usbhs_priv_to_dev(priv);
1509
1510         /*
1511          * disable irq callback
1512          */
1513         mod->irq_attch  = NULL;
1514         mod->irq_dtch   = NULL;
1515         mod->irq_sack   = NULL;
1516         mod->irq_sign   = NULL;
1517         usbhs_irq_callback_update(priv, mod);
1518
1519         usb_remove_hcd(hcd);
1520
1521         /* disable sys */
1522         usbhs_sys_host_ctrl(priv, 0);
1523
1524         dev_dbg(dev, "quit host\n");
1525
1526         return 0;
1527 }
1528
1529 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1530 {
1531         struct usbhsh_hpriv *hpriv;
1532         struct usb_hcd *hcd;
1533         struct usbhsh_device *udev;
1534         struct device *dev = usbhs_priv_to_dev(priv);
1535         int i;
1536
1537         /* initialize hcd */
1538         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1539         if (!hcd) {
1540                 dev_err(dev, "Failed to create hcd\n");
1541                 return -ENOMEM;
1542         }
1543         hcd->has_tt = 1; /* for low/full speed */
1544
1545         /*
1546          * CAUTION
1547          *
1548          * There is no guarantee that it is possible to access usb module here.
1549          * Don't accesses to it.
1550          * The accesse will be enable after "usbhsh_start"
1551          */
1552
1553         hpriv = usbhsh_hcd_to_hpriv(hcd);
1554
1555         /*
1556          * register itself
1557          */
1558         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1559
1560         /* init hpriv */
1561         hpriv->mod.name         = "host";
1562         hpriv->mod.start        = usbhsh_start;
1563         hpriv->mod.stop         = usbhsh_stop;
1564         usbhsh_port_stat_init(hpriv);
1565
1566         /* init all device */
1567         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1568                 udev->usbv      = NULL;
1569                 INIT_LIST_HEAD(&udev->ep_list_head);
1570         }
1571
1572         dev_info(dev, "host probed\n");
1573
1574         return 0;
1575 }
1576
1577 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1578 {
1579         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1580         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1581
1582         usb_put_hcd(hcd);
1583
1584         return 0;
1585 }