Linux 3.8-rc2
[~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         usbhsh_ureq_free(hpriv, ureq);
665
666         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
667         usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
668
669         usb_hcd_unlink_urb_from_ep(hcd, urb);
670         usb_hcd_giveback_urb(hcd, urb, status);
671 }
672
673 static int usbhsh_queue_push(struct usb_hcd *hcd,
674                              struct urb *urb,
675                              gfp_t mem_flags)
676 {
677         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
678         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
679         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
680         struct device *dev = usbhsh_hcd_to_dev(hcd);
681         struct usbhsh_request *ureq;
682         void *buf;
683         int len, sequence;
684
685         if (usb_pipeisoc(urb->pipe)) {
686                 dev_err(dev, "pipe iso is not supported now\n");
687                 return -EIO;
688         }
689
690         /* this ureq will be freed on usbhsh_queue_done() */
691         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
692         if (unlikely(!ureq)) {
693                 dev_err(dev, "ureq alloc fail\n");
694                 return -ENOMEM;
695         }
696
697         if (usb_pipein(urb->pipe))
698                 pipe->handler = &usbhs_fifo_dma_pop_handler;
699         else
700                 pipe->handler = &usbhs_fifo_dma_push_handler;
701
702         buf = (void *)(urb->transfer_buffer + urb->actual_length);
703         len = urb->transfer_buffer_length - urb->actual_length;
704
705         sequence = usb_gettoggle(urb->dev,
706                                  usb_pipeendpoint(urb->pipe),
707                                  usb_pipeout(urb->pipe));
708
709         dev_dbg(dev, "%s\n", __func__);
710         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
711                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
712                        sequence);
713
714         usbhs_pkt_start(pipe);
715
716         return 0;
717 }
718
719 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
720                                    struct usbhs_pipe *pipe)
721 {
722         struct usbhs_pkt *pkt;
723
724         while (1) {
725                 pkt = usbhs_pkt_pop(pipe, NULL);
726                 if (!pkt)
727                         break;
728
729                 /*
730                  * if all packet are gone, usbhsh_endpoint_disable()
731                  * will be called.
732                  * then, attached device/endpoint/pipe will be detached
733                  */
734                 usbhsh_queue_done(priv, pkt);
735         }
736 }
737
738 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
739 {
740         struct usbhs_pipe *pos;
741         int i;
742
743         usbhs_for_each_pipe_with_dcp(pos, priv, i)
744                 usbhsh_queue_force_pop(priv, pos);
745 }
746
747 /*
748  *              DCP setup stage
749  */
750 static int usbhsh_is_request_address(struct urb *urb)
751 {
752         struct usb_ctrlrequest *req;
753
754         req = (struct usb_ctrlrequest *)urb->setup_packet;
755
756         if ((DeviceOutRequest    == req->bRequestType << 8) &&
757             (USB_REQ_SET_ADDRESS == req->bRequest))
758                 return 1;
759         else
760                 return 0;
761 }
762
763 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
764                                            struct urb *urb,
765                                            struct usbhs_pipe *pipe)
766 {
767         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
768         struct usb_ctrlrequest req;
769         struct device *dev = usbhs_priv_to_dev(priv);
770
771         /*
772          * wait setup packet ACK
773          * see
774          *      usbhsh_irq_setup_ack()
775          *      usbhsh_irq_setup_err()
776          */
777         init_completion(&hpriv->setup_ack_done);
778
779         /* copy original request */
780         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
781
782         /*
783          * renesas_usbhs can not use original usb address.
784          * see HARDWARE LIMITATION.
785          * modify usb address here to use attached device.
786          * see usbhsh_device_attach()
787          */
788         if (usbhsh_is_request_address(urb)) {
789                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
790                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
791
792                 /* udev is a attached device */
793                 req.wValue = usbhsh_device_number(hpriv, udev);
794                 dev_dbg(dev, "create new address - %d\n", req.wValue);
795         }
796
797         /* set request */
798         usbhs_usbreq_set_val(priv, &req);
799
800         /*
801          * wait setup packet ACK
802          */
803         wait_for_completion(&hpriv->setup_ack_done);
804
805         dev_dbg(dev, "%s done\n", __func__);
806 }
807
808 /*
809  *              DCP data stage
810  */
811 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
812                                           struct usbhs_pkt *pkt)
813 {
814         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
815         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
816
817         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
818
819         usbhsh_ureq_free(hpriv, ureq);
820 }
821
822 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
823                                          struct urb *urb,
824                                          struct usbhs_pipe *pipe,
825                                          gfp_t mem_flags)
826
827 {
828         struct usbhsh_request *ureq;
829
830         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
831         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
832         if (unlikely(!ureq))
833                 return -ENOMEM;
834
835         if (usb_pipein(urb->pipe))
836                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
837         else
838                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
839
840         usbhs_pkt_push(pipe, &ureq->pkt,
841                        usbhsh_data_stage_packet_done,
842                        urb->transfer_buffer,
843                        urb->transfer_buffer_length,
844                        (urb->transfer_flags & URB_ZERO_PACKET),
845                        -1);
846
847         return 0;
848 }
849
850 /*
851  *              DCP status stage
852  */
853 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
854                                             struct urb *urb,
855                                             struct usbhs_pipe *pipe,
856                                             gfp_t mem_flags)
857 {
858         struct usbhsh_request *ureq;
859
860         /* This ureq will be freed on usbhsh_queue_done() */
861         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
862         if (unlikely(!ureq))
863                 return -ENOMEM;
864
865         if (usb_pipein(urb->pipe))
866                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
867         else
868                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
869
870         usbhs_pkt_push(pipe, &ureq->pkt,
871                        usbhsh_queue_done,
872                        NULL,
873                        urb->transfer_buffer_length,
874                        0, -1);
875
876         return 0;
877 }
878
879 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
880                                  struct urb *urb,
881                                  gfp_t mflags)
882 {
883         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
884         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
885         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
886         struct device *dev = usbhsh_hcd_to_dev(hcd);
887         int ret;
888
889         dev_dbg(dev, "%s\n", __func__);
890
891         /*
892          * setup stage
893          *
894          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
895          */
896         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
897
898         /*
899          * data stage
900          *
901          * It is pushed only when urb has buffer.
902          */
903         if (urb->transfer_buffer_length) {
904                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
905                 if (ret < 0) {
906                         dev_err(dev, "data stage failed\n");
907                         return ret;
908                 }
909         }
910
911         /*
912          * status stage
913          */
914         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
915         if (ret < 0) {
916                 dev_err(dev, "status stage failed\n");
917                 return ret;
918         }
919
920         /*
921          * start pushed packets
922          */
923         usbhs_pkt_start(pipe);
924
925         return 0;
926 }
927
928 /*
929  *              dma map functions
930  */
931 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
932 {
933         if (map) {
934                 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
935                 struct urb *urb = ureq->urb;
936
937                 /* it can not use scatter/gather */
938                 if (urb->num_sgs)
939                         return -EINVAL;
940
941                 pkt->dma = urb->transfer_dma;
942                 if (!pkt->dma)
943                         return -EINVAL;
944         }
945
946         return 0;
947 }
948
949 /*
950  *              for hc_driver
951  */
952 static int usbhsh_host_start(struct usb_hcd *hcd)
953 {
954         return 0;
955 }
956
957 static void usbhsh_host_stop(struct usb_hcd *hcd)
958 {
959 }
960
961 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
962                               struct urb *urb,
963                               gfp_t mem_flags)
964 {
965         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
966         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
967         struct device *dev = usbhs_priv_to_dev(priv);
968         struct usb_host_endpoint *ep = urb->ep;
969         struct usbhsh_device *new_udev = NULL;
970         int is_dir_in = usb_pipein(urb->pipe);
971         int ret;
972
973         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
974
975         if (!usbhsh_is_running(hpriv)) {
976                 ret = -EIO;
977                 dev_err(dev, "host is not running\n");
978                 goto usbhsh_urb_enqueue_error_not_linked;
979         }
980
981         ret = usb_hcd_link_urb_to_ep(hcd, urb);
982         if (ret) {
983                 dev_err(dev, "urb link failed\n");
984                 goto usbhsh_urb_enqueue_error_not_linked;
985         }
986
987         /*
988          * attach udev if needed
989          * see [image of mod_host]
990          */
991         if (!usbhsh_device_get(hpriv, urb)) {
992                 new_udev = usbhsh_device_attach(hpriv, urb);
993                 if (!new_udev) {
994                         ret = -EIO;
995                         dev_err(dev, "device attach failed\n");
996                         goto usbhsh_urb_enqueue_error_not_linked;
997                 }
998         }
999
1000         /*
1001          * attach endpoint if needed
1002          * see [image of mod_host]
1003          */
1004         if (!usbhsh_ep_to_uep(ep)) {
1005                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1006                 if (ret < 0) {
1007                         dev_err(dev, "endpoint attach failed\n");
1008                         goto usbhsh_urb_enqueue_error_free_device;
1009                 }
1010         }
1011
1012         /*
1013          * attach pipe to endpoint
1014          * see [image of mod_host]
1015          */
1016         ret = usbhsh_pipe_attach(hpriv, urb);
1017         if (ret < 0) {
1018                 dev_err(dev, "pipe attach failed\n");
1019                 goto usbhsh_urb_enqueue_error_free_endpoint;
1020         }
1021
1022         /*
1023          * push packet
1024          */
1025         if (usb_pipecontrol(urb->pipe))
1026                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1027         else
1028                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1029
1030         return ret;
1031
1032 usbhsh_urb_enqueue_error_free_endpoint:
1033         usbhsh_endpoint_detach(hpriv, ep);
1034 usbhsh_urb_enqueue_error_free_device:
1035         if (new_udev)
1036                 usbhsh_device_detach(hpriv, new_udev);
1037 usbhsh_urb_enqueue_error_not_linked:
1038
1039         dev_dbg(dev, "%s error\n", __func__);
1040
1041         return ret;
1042 }
1043
1044 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1045 {
1046         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1047         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1048
1049         if (ureq) {
1050                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1051                 struct usbhs_pkt *pkt = &ureq->pkt;
1052
1053                 usbhs_pkt_pop(pkt->pipe, pkt);
1054                 usbhsh_queue_done(priv, pkt);
1055         }
1056
1057         return 0;
1058 }
1059
1060 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1061                                     struct usb_host_endpoint *ep)
1062 {
1063         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1064         struct usbhsh_device *udev;
1065         struct usbhsh_hpriv *hpriv;
1066
1067         /*
1068          * this function might be called manytimes by same hcd/ep
1069          * in-endpoint == out-endpoint if ep == dcp.
1070          */
1071         if (!uep)
1072                 return;
1073
1074         udev    = usbhsh_uep_to_udev(uep);
1075         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1076
1077         usbhsh_endpoint_detach(hpriv, ep);
1078
1079         /*
1080          * if there is no endpoint,
1081          * free device
1082          */
1083         if (!usbhsh_device_has_endpoint(udev))
1084                 usbhsh_device_detach(hpriv, udev);
1085 }
1086
1087 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1088 {
1089         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1090         int roothub_id = 1; /* only 1 root hub */
1091
1092         /*
1093          * does port stat was changed ?
1094          * check USB_PORT_STAT_C_xxx << 16
1095          */
1096         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1097                 *buf = (1 << roothub_id);
1098         else
1099                 *buf = 0;
1100
1101         return !!(*buf);
1102 }
1103
1104 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1105                                     u16 typeReq, u16 wValue,
1106                                     u16 wIndex, char *buf, u16 wLength)
1107 {
1108         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1109         struct device *dev = usbhs_priv_to_dev(priv);
1110
1111         switch (wValue) {
1112         case C_HUB_OVER_CURRENT:
1113         case C_HUB_LOCAL_POWER:
1114                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1115                 return 0;
1116         }
1117
1118         return -EPIPE;
1119 }
1120
1121 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1122                                      u16 typeReq, u16 wValue,
1123                                      u16 wIndex, char *buf, u16 wLength)
1124 {
1125         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1126         struct device *dev = usbhs_priv_to_dev(priv);
1127         int enable = (typeReq == SetPortFeature);
1128         int speed, i, timeout = 128;
1129         int roothub_id = 1; /* only 1 root hub */
1130
1131         /* common error */
1132         if (wIndex > roothub_id || wLength != 0)
1133                 return -EPIPE;
1134
1135         /* check wValue */
1136         switch (wValue) {
1137         case USB_PORT_FEAT_POWER:
1138                 usbhs_vbus_ctrl(priv, enable);
1139                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1140                 break;
1141
1142         case USB_PORT_FEAT_ENABLE:
1143         case USB_PORT_FEAT_SUSPEND:
1144         case USB_PORT_FEAT_C_ENABLE:
1145         case USB_PORT_FEAT_C_SUSPEND:
1146         case USB_PORT_FEAT_C_CONNECTION:
1147         case USB_PORT_FEAT_C_OVER_CURRENT:
1148         case USB_PORT_FEAT_C_RESET:
1149                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1150                 break;
1151
1152         case USB_PORT_FEAT_RESET:
1153                 if (!enable)
1154                         break;
1155
1156                 usbhsh_port_stat_clear(hpriv,
1157                                        USB_PORT_STAT_HIGH_SPEED |
1158                                        USB_PORT_STAT_LOW_SPEED);
1159
1160                 usbhsh_queue_force_pop_all(priv);
1161
1162                 usbhs_bus_send_reset(priv);
1163                 msleep(20);
1164                 usbhs_bus_send_sof_enable(priv);
1165
1166                 for (i = 0; i < timeout ; i++) {
1167                         switch (usbhs_bus_get_speed(priv)) {
1168                         case USB_SPEED_LOW:
1169                                 speed = USB_PORT_STAT_LOW_SPEED;
1170                                 goto got_usb_bus_speed;
1171                         case USB_SPEED_HIGH:
1172                                 speed = USB_PORT_STAT_HIGH_SPEED;
1173                                 goto got_usb_bus_speed;
1174                         case USB_SPEED_FULL:
1175                                 speed = 0;
1176                                 goto got_usb_bus_speed;
1177                         }
1178
1179                         msleep(20);
1180                 }
1181                 return -EPIPE;
1182
1183 got_usb_bus_speed:
1184                 usbhsh_port_stat_set(hpriv, speed);
1185                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1186
1187                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1188                         __func__, speed);
1189
1190                 /* status change is not needed */
1191                 return 0;
1192
1193         default:
1194                 return -EPIPE;
1195         }
1196
1197         /* set/clear status */
1198         if (enable)
1199                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1200         else
1201                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1202
1203         return 0;
1204 }
1205
1206 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1207                                    u16 typeReq, u16 wValue,
1208                                    u16 wIndex, char *buf, u16 wLength)
1209 {
1210         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1211         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1212         struct device *dev = usbhs_priv_to_dev(priv);
1213         int roothub_id = 1; /* only 1 root hub */
1214
1215         switch (typeReq) {
1216         case GetHubStatus:
1217                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1218
1219                 *buf = 0x00;
1220                 break;
1221
1222         case GetPortStatus:
1223                 if (wIndex != roothub_id)
1224                         return -EPIPE;
1225
1226                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1227                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1228                 break;
1229
1230         case GetHubDescriptor:
1231                 desc->bDescriptorType           = 0x29;
1232                 desc->bHubContrCurrent          = 0;
1233                 desc->bNbrPorts                 = roothub_id;
1234                 desc->bDescLength               = 9;
1235                 desc->bPwrOn2PwrGood            = 0;
1236                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1237                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1238                 desc->u.hs.DeviceRemovable[1]   = ~0;
1239                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1240                 break;
1241         }
1242
1243         return 0;
1244 }
1245
1246 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1247                               u16 wIndex, char *buf, u16 wLength)
1248 {
1249         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1250         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1251         struct device *dev = usbhs_priv_to_dev(priv);
1252         int ret = -EPIPE;
1253
1254         switch (typeReq) {
1255
1256         /* Hub Feature */
1257         case ClearHubFeature:
1258         case SetHubFeature:
1259                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1260                                                wValue, wIndex, buf, wLength);
1261                 break;
1262
1263         /* Port Feature */
1264         case SetPortFeature:
1265         case ClearPortFeature:
1266                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1267                                                 wValue, wIndex, buf, wLength);
1268                 break;
1269
1270         /* Get status */
1271         case GetHubStatus:
1272         case GetPortStatus:
1273         case GetHubDescriptor:
1274                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1275                                               wValue, wIndex, buf, wLength);
1276                 break;
1277         }
1278
1279         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1280                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1281
1282         return ret;
1283 }
1284
1285 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1286 {
1287         /* nothing to do */
1288         return 0;
1289 }
1290
1291 static struct hc_driver usbhsh_driver = {
1292         .description =          usbhsh_hcd_name,
1293         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1294
1295         /*
1296          * generic hardware linkage
1297          */
1298         .flags =                HCD_USB2,
1299
1300         .start =                usbhsh_host_start,
1301         .stop =                 usbhsh_host_stop,
1302
1303         /*
1304          * managing i/o requests and associated device resources
1305          */
1306         .urb_enqueue =          usbhsh_urb_enqueue,
1307         .urb_dequeue =          usbhsh_urb_dequeue,
1308         .endpoint_disable =     usbhsh_endpoint_disable,
1309
1310         /*
1311          * root hub
1312          */
1313         .hub_status_data =      usbhsh_hub_status_data,
1314         .hub_control =          usbhsh_hub_control,
1315         .bus_suspend =          usbhsh_bus_nop,
1316         .bus_resume =           usbhsh_bus_nop,
1317 };
1318
1319 /*
1320  *              interrupt functions
1321  */
1322 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1323                             struct usbhs_irq_state *irq_state)
1324 {
1325         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1326         struct device *dev = usbhs_priv_to_dev(priv);
1327
1328         dev_dbg(dev, "device attached\n");
1329
1330         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1331         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1332
1333         /*
1334          * attch interrupt might happen infinitely on some device
1335          * (on self power USB hub ?)
1336          * disable it here.
1337          *
1338          * usbhsh_is_running() becomes effective
1339          * according to this process.
1340          * see
1341          *      usbhsh_is_running()
1342          *      usbhsh_urb_enqueue()
1343          */
1344         hpriv->mod.irq_attch = NULL;
1345         usbhs_irq_callback_update(priv, &hpriv->mod);
1346
1347         return 0;
1348 }
1349
1350 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1351                            struct usbhs_irq_state *irq_state)
1352 {
1353         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1354         struct device *dev = usbhs_priv_to_dev(priv);
1355
1356         dev_dbg(dev, "device detached\n");
1357
1358         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1359         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1360
1361         /*
1362          * enable attch interrupt again
1363          *
1364          * usbhsh_is_running() becomes invalid
1365          * according to this process.
1366          * see
1367          *      usbhsh_is_running()
1368          *      usbhsh_urb_enqueue()
1369          */
1370         hpriv->mod.irq_attch = usbhsh_irq_attch;
1371         usbhs_irq_callback_update(priv, &hpriv->mod);
1372
1373         /*
1374          * usbhsh_queue_force_pop_all() should be called
1375          * after usbhsh_is_running() becomes invalid.
1376          */
1377         usbhsh_queue_force_pop_all(priv);
1378
1379         return 0;
1380 }
1381
1382 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1383                                 struct usbhs_irq_state *irq_state)
1384 {
1385         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1386         struct device *dev = usbhs_priv_to_dev(priv);
1387
1388         dev_dbg(dev, "setup packet OK\n");
1389
1390         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1391
1392         return 0;
1393 }
1394
1395 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1396                                 struct usbhs_irq_state *irq_state)
1397 {
1398         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1399         struct device *dev = usbhs_priv_to_dev(priv);
1400
1401         dev_dbg(dev, "setup packet Err\n");
1402
1403         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1404
1405         return 0;
1406 }
1407
1408 /*
1409  *              module start/stop
1410  */
1411 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1412 {
1413         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1414         struct usbhs_pipe *pipe;
1415         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1416         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1417         int old_type, dir_in, i;
1418
1419         /* init all pipe */
1420         old_type = USB_ENDPOINT_XFER_CONTROL;
1421         for (i = 0; i < pipe_size; i++) {
1422
1423                 /*
1424                  * data "output" will be finished as soon as possible,
1425                  * but there is no guaranty at data "input" case.
1426                  *
1427                  * "input" needs "standby" pipe.
1428                  * So, "input" direction pipe > "output" direction pipe
1429                  * is good idea.
1430                  *
1431                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1432                  * and the other will be input direction here.
1433                  *
1434                  * ex)
1435                  * ...
1436                  * USB_ENDPOINT_XFER_ISOC -> dir out
1437                  * USB_ENDPOINT_XFER_ISOC -> dir in
1438                  * USB_ENDPOINT_XFER_BULK -> dir out
1439                  * USB_ENDPOINT_XFER_BULK -> dir in
1440                  * USB_ENDPOINT_XFER_BULK -> dir in
1441                  * ...
1442                  */
1443                 dir_in = (pipe_type[i] == old_type);
1444                 old_type = pipe_type[i];
1445
1446                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1447                         pipe = usbhs_dcp_malloc(priv);
1448                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1449                 } else {
1450                         pipe = usbhs_pipe_malloc(priv,
1451                                                  pipe_type[i],
1452                                                  dir_in);
1453                 }
1454
1455                 pipe->mod_private = NULL;
1456         }
1457 }
1458
1459 static int usbhsh_start(struct usbhs_priv *priv)
1460 {
1461         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1462         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1463         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1464         struct device *dev = usbhs_priv_to_dev(priv);
1465         int ret;
1466
1467         /* add hcd */
1468         ret = usb_add_hcd(hcd, 0, 0);
1469         if (ret < 0)
1470                 return 0;
1471
1472         /*
1473          * pipe initialize and enable DCP
1474          */
1475         usbhs_pipe_init(priv,
1476                         usbhsh_dma_map_ctrl);
1477         usbhs_fifo_init(priv);
1478         usbhsh_pipe_init_for_host(priv);
1479
1480         /*
1481          * system config enble
1482          * - HI speed
1483          * - host
1484          * - usb module
1485          */
1486         usbhs_sys_host_ctrl(priv, 1);
1487
1488         /*
1489          * enable irq callback
1490          */
1491         mod->irq_attch          = usbhsh_irq_attch;
1492         mod->irq_dtch           = usbhsh_irq_dtch;
1493         mod->irq_sack           = usbhsh_irq_setup_ack;
1494         mod->irq_sign           = usbhsh_irq_setup_err;
1495         usbhs_irq_callback_update(priv, mod);
1496
1497         dev_dbg(dev, "start host\n");
1498
1499         return ret;
1500 }
1501
1502 static int usbhsh_stop(struct usbhs_priv *priv)
1503 {
1504         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1505         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1506         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1507         struct device *dev = usbhs_priv_to_dev(priv);
1508
1509         /*
1510          * disable irq callback
1511          */
1512         mod->irq_attch  = NULL;
1513         mod->irq_dtch   = NULL;
1514         mod->irq_sack   = NULL;
1515         mod->irq_sign   = NULL;
1516         usbhs_irq_callback_update(priv, mod);
1517
1518         usb_remove_hcd(hcd);
1519
1520         /* disable sys */
1521         usbhs_sys_host_ctrl(priv, 0);
1522
1523         dev_dbg(dev, "quit host\n");
1524
1525         return 0;
1526 }
1527
1528 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1529 {
1530         struct usbhsh_hpriv *hpriv;
1531         struct usb_hcd *hcd;
1532         struct usbhsh_device *udev;
1533         struct device *dev = usbhs_priv_to_dev(priv);
1534         int i;
1535
1536         /* initialize hcd */
1537         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1538         if (!hcd) {
1539                 dev_err(dev, "Failed to create hcd\n");
1540                 return -ENOMEM;
1541         }
1542         hcd->has_tt = 1; /* for low/full speed */
1543
1544         /*
1545          * CAUTION
1546          *
1547          * There is no guarantee that it is possible to access usb module here.
1548          * Don't accesses to it.
1549          * The accesse will be enable after "usbhsh_start"
1550          */
1551
1552         hpriv = usbhsh_hcd_to_hpriv(hcd);
1553
1554         /*
1555          * register itself
1556          */
1557         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1558
1559         /* init hpriv */
1560         hpriv->mod.name         = "host";
1561         hpriv->mod.start        = usbhsh_start;
1562         hpriv->mod.stop         = usbhsh_stop;
1563         usbhsh_port_stat_init(hpriv);
1564
1565         /* init all device */
1566         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1567                 udev->usbv      = NULL;
1568                 INIT_LIST_HEAD(&udev->ep_list_head);
1569         }
1570
1571         dev_info(dev, "host probed\n");
1572
1573         return 0;
1574 }
1575
1576 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1577 {
1578         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1579         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1580
1581         usb_put_hcd(hcd);
1582
1583         return 0;
1584 }