usb: renesas_usbhs: fifo became independent from pipe.
[pandora-kernel.git] / drivers / usb / renesas_usbhs / mod_gadget.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/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/usb/ch9.h>
21 #include <linux/usb/gadget.h>
22 #include "common.h"
23
24 /*
25  *              struct
26  */
27 struct usbhsg_request {
28         struct usb_request      req;
29         struct list_head        node;
30 };
31
32 #define EP_NAME_SIZE 8
33 struct usbhsg_gpriv;
34 struct usbhsg_pipe_handle;
35 struct usbhsg_uep {
36         struct usb_ep            ep;
37         struct usbhs_pipe       *pipe;
38         struct list_head         list;
39
40         char ep_name[EP_NAME_SIZE];
41
42         struct usbhsg_gpriv *gpriv;
43         struct usbhsg_pipe_handle *handler;
44 };
45
46 struct usbhsg_gpriv {
47         struct usb_gadget        gadget;
48         struct usbhs_mod         mod;
49
50         struct usbhsg_uep       *uep;
51         int                      uep_size;
52
53         struct usb_gadget_driver        *driver;
54
55         u32     status;
56 #define USBHSG_STATUS_STARTED           (1 << 0)
57 #define USBHSG_STATUS_REGISTERD         (1 << 1)
58 #define USBHSG_STATUS_WEDGE             (1 << 2)
59 };
60
61 struct usbhsg_pipe_handle {
62         int (*prepare)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
63         int (*try_run)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
64         void (*irq_mask)(struct usbhsg_uep *uep, int enable);
65 };
66
67 struct usbhsg_recip_handle {
68         char *name;
69         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
70                       struct usb_ctrlrequest *ctrl);
71         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
72                          struct usb_ctrlrequest *ctrl);
73         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
74                         struct usb_ctrlrequest *ctrl);
75 };
76
77 /*
78  *              macro
79  */
80 #define usbhsg_priv_to_gpriv(priv)                      \
81         container_of(                                   \
82                 usbhs_mod_get(priv, USBHS_GADGET),      \
83                 struct usbhsg_gpriv, mod)
84
85 #define __usbhsg_for_each_uep(start, pos, g, i) \
86         for (i = start, pos = (g)->uep;         \
87              i < (g)->uep_size;                 \
88              i++, pos = (g)->uep + i)
89
90 #define usbhsg_for_each_uep(pos, gpriv, i)      \
91         __usbhsg_for_each_uep(1, pos, gpriv, i)
92
93 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
94         __usbhsg_for_each_uep(0, pos, gpriv, i)
95
96 #define usbhsg_gadget_to_gpriv(g)\
97         container_of(g, struct usbhsg_gpriv, gadget)
98
99 #define usbhsg_req_to_ureq(r)\
100         container_of(r, struct usbhsg_request, req)
101
102 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
103 #define usbhsg_gpriv_to_lock(gp)        usbhs_priv_to_lock((gp)->mod.priv)
104 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
105 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
106 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
107 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
108 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
109 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
110 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
111 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
112
113 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
114
115 /* status */
116 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
117 #define usbhsg_status_set(gp, b) (gp->status |=  b)
118 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
119 #define usbhsg_status_has(gp, b) (gp->status &   b)
120
121 /*
122  *              usbhsg_trylock
123  *
124  * This driver don't use spin_try_lock
125  * to avoid warning of CONFIG_DEBUG_SPINLOCK
126  */
127 static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv,
128                                   unsigned long *flags)
129 {
130         spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
131
132         /* check spin lock status
133          * to avoid deadlock/nest */
134         if (spin_is_locked(lock))
135                 return NULL;
136
137         spin_lock_irqsave(lock, *flags);
138
139         return lock;
140 }
141
142 static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags)
143 {
144         if (!lock)
145                 return;
146
147         spin_unlock_irqrestore(lock, *flags);
148 }
149
150 /*
151  *              list push/pop
152  */
153 static void usbhsg_queue_push(struct usbhsg_uep *uep,
154                               struct usbhsg_request *ureq)
155 {
156         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
157         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
158         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
159
160         /*
161          *********  assume under spin lock  *********
162          */
163         list_del_init(&ureq->node);
164         list_add_tail(&ureq->node, &uep->list);
165         ureq->req.actual = 0;
166         ureq->req.status = -EINPROGRESS;
167
168         dev_dbg(dev, "pipe %d : queue push (%d)\n",
169                 usbhs_pipe_number(pipe),
170                 ureq->req.length);
171 }
172
173 static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
174 {
175         /*
176          *********  assume under spin lock  *********
177          */
178         if (list_empty(&uep->list))
179                 return NULL;
180
181         return list_entry(uep->list.next, struct usbhsg_request, node);
182 }
183
184 #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
185 #define usbhsg_queue_handle(uep)  __usbhsg_queue_handler(uep, 0);
186 static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare)
187 {
188         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
189         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
190         struct usbhsg_request *ureq;
191         spinlock_t *lock;
192         unsigned long flags;
193         int ret = 0;
194
195         if (!uep->handler) {
196                 dev_err(dev, "no handler function\n");
197                 return -EIO;
198         }
199
200         /*
201          * CAUTION [*queue handler*]
202          *
203          * This function will be called for start/restart queue operation.
204          * OTOH the most much worry for USB driver is spinlock nest.
205          * Specially it are
206          *   - usb_ep_ops  :: queue
207          *   - usb_request :: complete
208          *
209          * But the caller of this function need not care about spinlock.
210          * This function is using usbhsg_trylock for it.
211          * if "is_locked" is 1, this mean this function lock it.
212          * but if it is 0, this mean it is already under spin lock.
213          * see also
214          *   CAUTION [*endpoint queue*]
215          *   CAUTION [*request complete*]
216          */
217
218         /******************  spin try lock *******************/
219         lock = usbhsg_trylock(gpriv, &flags);
220
221         ureq = usbhsg_queue_get(uep);
222         if (ureq) {
223                 if (prepare)
224                         ret = uep->handler->prepare(uep, ureq);
225                 else
226                         ret = uep->handler->try_run(uep, ureq);
227         }
228         usbhsg_unlock(lock, &flags);
229         /********************  spin unlock ******************/
230
231         return ret;
232 }
233
234 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
235                              struct usbhsg_request *ureq,
236                              int status)
237 {
238         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
239         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
240         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
241
242         /*
243          *********  assume under spin lock  *********
244          */
245
246         /*
247          * CAUTION [*request complete*]
248          *
249          * There is a possibility not to be called in correct order
250          * if "complete" is called without spinlock.
251          *
252          * So, this function assume it is under spinlock,
253          * and call usb_request :: complete.
254          *
255          * But this "complete" will push next usb_request.
256          * It mean "usb_ep_ops :: queue" which is using spinlock is called
257          * under spinlock.
258          *
259          * To avoid dead-lock, this driver is using usbhsg_trylock.
260          *   CAUTION [*endpoint queue*]
261          *   CAUTION [*queue handler*]
262          */
263
264         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
265
266         list_del_init(&ureq->node);
267
268         ureq->req.status = status;
269         ureq->req.complete(&uep->ep, &ureq->req);
270
271         /* more request ? */
272         if (0 == status)
273                 usbhsg_queue_prepare(uep);
274 }
275
276 /*
277  *              irq enable/disable function
278  */
279 #define usbhsg_irq_callback_ctrl(uep, status, enable)                   \
280         ({                                                              \
281                 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);  \
282                 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);      \
283                 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);  \
284                 struct usbhs_mod *mod = usbhs_mod_get_current(priv);    \
285                 if (!mod)                                               \
286                         return;                                         \
287                 if (enable)                                             \
288                         mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
289                 else                                                    \
290                         mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
291                 usbhs_irq_callback_update(priv, mod);                   \
292         })
293
294 static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable)
295 {
296         usbhsg_irq_callback_ctrl(uep, bempsts, enable);
297 }
298
299 static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable)
300 {
301         usbhsg_irq_callback_ctrl(uep, brdysts, enable);
302 }
303
304 /*
305  *              handler function
306  */
307 static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep,
308                                          struct usbhsg_request *ureq)
309 {
310         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
311
312         /*
313          *********  assume under spin lock  *********
314          */
315
316         usbhs_dcp_control_transfer_done(pipe);
317         usbhsg_queue_pop(uep, ureq, 0);
318
319         return 0;
320 }
321
322 static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
323                                       struct usbhsg_request *ureq)
324 {
325         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
326         struct usb_request *req = &ureq->req;
327         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
328         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
329         void *buf;
330         int remainder, send;
331         int is_done = 0;
332         int enable;
333         int maxp;
334
335         /*
336          *********  assume under spin lock  *********
337          */
338
339         maxp            = usbhs_pipe_get_maxpacket(pipe);
340         buf             = req->buf    + req->actual;
341         remainder       = req->length - req->actual;
342
343         send = usbhs_fifo_write(pipe, buf, remainder);
344
345         /*
346          * send < 0 : pipe busy
347          * send = 0 : send zero packet
348          * send > 0 : send data
349          *
350          * send <= max_packet
351          */
352         if (send > 0)
353                 req->actual += send;
354
355         /* send all packet ? */
356         if (send < remainder)
357                 is_done = 0;            /* there are remainder data */
358         else if (send < maxp)
359                 is_done = 1;            /* short packet */
360         else
361                 is_done = !req->zero;   /* send zero packet ? */
362
363         dev_dbg(dev, "  send %d (%d/ %d/ %d/ %d)\n",
364                 usbhs_pipe_number(pipe),
365                 remainder, send, is_done, req->zero);
366
367         /*
368          * enable interrupt and send again in irq handler
369          * if it still have remainder data which should be sent.
370          */
371         enable = !is_done;
372         uep->handler->irq_mask(uep, enable);
373
374         /*
375          * usbhs_fifo_enable execute
376          *  - after callback_update,
377          *  - before queue_pop / stage_end
378          */
379         usbhs_pipe_enable(pipe);
380
381         /*
382          * all data were sent ?
383          */
384         if (is_done) {
385                 /* it care below call in
386                    "function mode" */
387                 if (usbhsg_is_dcp(uep))
388                         usbhs_dcp_control_transfer_done(pipe);
389
390                 usbhsg_queue_pop(uep, ureq, 0);
391         }
392
393         return 0;
394 }
395
396 static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep,
397                                       struct usbhsg_request *ureq)
398 {
399         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
400
401         /*
402          *********  assume under spin lock  *********
403          */
404
405         usbhs_fifo_prepare_write(pipe);
406         usbhsg_try_run_send_packet(uep, ureq);
407
408         return 0;
409 }
410
411 static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
412                                          struct usbhsg_request *ureq)
413 {
414         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
415         struct usb_request *req = &ureq->req;
416         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
417         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
418         void *buf;
419         int maxp;
420         int remainder, recv;
421         int is_done = 0;
422
423         /*
424          *********  assume under spin lock  *********
425          */
426
427         maxp            = usbhs_pipe_get_maxpacket(pipe);
428         buf             = req->buf    + req->actual;
429         remainder       = req->length - req->actual;
430
431         recv = usbhs_fifo_read(pipe, buf, remainder);
432         /*
433          * recv < 0  : pipe busy
434          * recv >= 0 : receive data
435          *
436          * recv <= max_packet
437          */
438         if (recv < 0)
439                 return -EBUSY;
440
441         /* update parameters */
442         req->actual += recv;
443
444         if ((recv == remainder) ||      /* receive all data */
445             (recv < maxp))              /* short packet */
446                 is_done = 1;
447
448         dev_dbg(dev, "  recv %d (%d/ %d/ %d/ %d)\n",
449                 usbhs_pipe_number(pipe),
450                 remainder, recv, is_done, req->zero);
451
452         /* read all data ? */
453         if (is_done) {
454                 int disable = 0;
455
456                 uep->handler->irq_mask(uep, disable);
457                 usbhs_pipe_disable(pipe);
458                 usbhsg_queue_pop(uep, ureq, 0);
459         }
460
461         return 0;
462 }
463
464 static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep,
465                                          struct usbhsg_request *ureq)
466 {
467         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
468         int enable = 1;
469         int ret;
470
471         /*
472          *********  assume under spin lock  *********
473          */
474
475         ret = usbhs_fifo_prepare_read(pipe);
476         if (ret < 0)
477                 return ret;
478
479         /*
480          * data will be read in interrupt handler
481          */
482         uep->handler->irq_mask(uep, enable);
483
484         return ret;
485 }
486
487 static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = {
488         .prepare        = usbhsg_prepare_send_packet,
489         .try_run        = usbhsg_try_run_send_packet,
490         .irq_mask       = usbhsg_irq_empty_ctrl,
491 };
492
493 static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = {
494         .prepare        = usbhsg_prepare_send_packet,
495         .try_run        = usbhsg_try_run_send_packet,
496         .irq_mask       = usbhsg_irq_ready_ctrl,
497 };
498
499 static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = {
500         .prepare        = usbhsg_prepare_receive_packet,
501         .try_run        = usbhsg_try_run_receive_packet,
502         .irq_mask       = usbhsg_irq_ready_ctrl,
503 };
504
505 static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = {
506         .prepare        = usbhsg_try_run_ctrl_stage_end,
507         .try_run        = usbhsg_try_run_ctrl_stage_end,
508 };
509
510 /*
511  * DCP pipe can NOT use "ready interrupt" for "send"
512  * it should use "empty" interrupt.
513  * see
514  *   "Operation" - "Interrupt Function" - "BRDY Interrupt"
515  *
516  * on the other hand, normal pipe can use "ready interrupt" for "send"
517  * even though it is single/double buffer
518  */
519 #define usbhsg_handler_send_ctrl        usbhsg_handler_send_by_empty
520 #define usbhsg_handler_recv_ctrl        usbhsg_handler_recv_by_ready
521
522 #define usbhsg_handler_send_packet      usbhsg_handler_send_by_ready
523 #define usbhsg_handler_recv_packet      usbhsg_handler_recv_by_ready
524
525 /*
526  *              USB_TYPE_STANDARD / clear feature functions
527  */
528 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
529                                                  struct usbhsg_uep *uep,
530                                                  struct usb_ctrlrequest *ctrl)
531 {
532         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
533         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
534         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
535
536         usbhs_dcp_control_transfer_done(pipe);
537
538         return 0;
539 }
540
541 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
542                                                    struct usbhsg_uep *uep,
543                                                    struct usb_ctrlrequest *ctrl)
544 {
545         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
546         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
547
548         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
549                 usbhs_pipe_disable(pipe);
550                 usbhs_pipe_clear_sequence(pipe);
551                 usbhs_pipe_enable(pipe);
552         }
553
554         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
555
556         usbhsg_queue_prepare(uep);
557
558         return 0;
559 }
560
561 struct usbhsg_recip_handle req_clear_feature = {
562         .name           = "clear feature",
563         .device         = usbhsg_recip_handler_std_control_done,
564         .interface      = usbhsg_recip_handler_std_control_done,
565         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
566 };
567
568 /*
569  *              USB_TYPE handler
570  */
571 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
572                                    struct usbhsg_recip_handle *handler,
573                                    struct usb_ctrlrequest *ctrl)
574 {
575         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
576         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
577         struct usbhsg_uep *uep;
578         int recip = ctrl->bRequestType & USB_RECIP_MASK;
579         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
580         int ret;
581         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
582                     struct usb_ctrlrequest *ctrl);
583         char *msg;
584
585         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
586         if (!usbhsg_uep_to_pipe(uep)) {
587                 dev_err(dev, "wrong recip request\n");
588                 return -EINVAL;
589         }
590
591         switch (recip) {
592         case USB_RECIP_DEVICE:
593                 msg     = "DEVICE";
594                 func    = handler->device;
595                 break;
596         case USB_RECIP_INTERFACE:
597                 msg     = "INTERFACE";
598                 func    = handler->interface;
599                 break;
600         case USB_RECIP_ENDPOINT:
601                 msg     = "ENDPOINT";
602                 func    = handler->endpoint;
603                 break;
604         default:
605                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
606                 func = NULL;
607                 ret = -EINVAL;
608         }
609
610         if (func) {
611                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
612                 ret = func(priv, uep, ctrl);
613         }
614
615         return ret;
616 }
617
618 /*
619  *              irq functions
620  *
621  * it will be called from usbhs_interrupt
622  */
623 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
624                                 struct usbhs_irq_state *irq_state)
625 {
626         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
627         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
628
629         gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
630
631         dev_dbg(dev, "state = %x : speed : %d\n",
632                 usbhs_status_get_device_state(irq_state),
633                 gpriv->gadget.speed);
634
635         return 0;
636 }
637
638 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
639                                  struct usbhs_irq_state *irq_state)
640 {
641         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
642         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
643         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
644         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
645         struct usb_ctrlrequest ctrl;
646         struct usbhsg_recip_handle *recip_handler = NULL;
647         int stage = usbhs_status_get_ctrl_stage(irq_state);
648         int ret = 0;
649
650         dev_dbg(dev, "stage = %d\n", stage);
651
652         /*
653          * see Manual
654          *
655          *  "Operation"
656          *  - "Interrupt Function"
657          *    - "Control Transfer Stage Transition Interrupt"
658          *      - Fig. "Control Transfer Stage Transitions"
659          */
660
661         switch (stage) {
662         case READ_DATA_STAGE:
663                 dcp->handler = &usbhsg_handler_send_ctrl;
664                 break;
665         case WRITE_DATA_STAGE:
666                 dcp->handler = &usbhsg_handler_recv_ctrl;
667                 break;
668         case NODATA_STATUS_STAGE:
669                 dcp->handler = &usbhsg_handler_ctrl_stage_end;
670                 break;
671         default:
672                 return ret;
673         }
674
675         /*
676          * get usb request
677          */
678         usbhs_usbreq_get_val(priv, &ctrl);
679
680         switch (ctrl.bRequestType & USB_TYPE_MASK) {
681         case USB_TYPE_STANDARD:
682                 switch (ctrl.bRequest) {
683                 case USB_REQ_CLEAR_FEATURE:
684                         recip_handler = &req_clear_feature;
685                         break;
686                 }
687         }
688
689         /*
690          * setup stage / run recip
691          */
692         if (recip_handler)
693                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
694         else
695                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
696
697         if (ret < 0)
698                 usbhs_pipe_stall(pipe);
699
700         return ret;
701 }
702
703 static int usbhsg_irq_empty(struct usbhs_priv *priv,
704                             struct usbhs_irq_state *irq_state)
705 {
706         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
707         struct usbhsg_uep *uep;
708         struct usbhs_pipe *pipe;
709         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
710         int i, ret;
711
712         if (!irq_state->bempsts) {
713                 dev_err(dev, "debug %s !!\n", __func__);
714                 return -EIO;
715         }
716
717         dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
718
719         /*
720          * search interrupted "pipe"
721          * not "uep".
722          */
723         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
724                 if (!(irq_state->bempsts & (1 << i)))
725                         continue;
726
727                 uep     = usbhsg_pipe_to_uep(pipe);
728                 ret     = usbhsg_queue_handle(uep);
729                 if (ret < 0)
730                         dev_err(dev, "send error %d : %d\n", i, ret);
731         }
732
733         return 0;
734 }
735
736 static int usbhsg_irq_ready(struct usbhs_priv *priv,
737                             struct usbhs_irq_state *irq_state)
738 {
739         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
740         struct usbhsg_uep *uep;
741         struct usbhs_pipe *pipe;
742         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
743         int i, ret;
744
745         if (!irq_state->brdysts) {
746                 dev_err(dev, "debug %s !!\n", __func__);
747                 return -EIO;
748         }
749
750         dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
751
752         /*
753          * search interrupted "pipe"
754          * not "uep".
755          */
756         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
757                 if (!(irq_state->brdysts & (1 << i)))
758                         continue;
759
760                 uep     = usbhsg_pipe_to_uep(pipe);
761                 ret     = usbhsg_queue_handle(uep);
762                 if (ret < 0)
763                         dev_err(dev, "receive error %d : %d\n", i, ret);
764         }
765
766         return 0;
767 }
768
769 /*
770  *
771  *              usb_dcp_ops
772  *
773  */
774 static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
775 {
776         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
777         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
778         struct usbhs_pipe *pipe;
779
780         /*
781          *********  assume under spin lock  *********
782          */
783
784         pipe = usbhs_dcp_malloc(priv);
785         if (!pipe)
786                 return -EIO;
787
788         uep->pipe               = pipe;
789         uep->pipe->mod_private  = uep;
790         INIT_LIST_HEAD(&uep->list);
791
792         return 0;
793 }
794
795 #define usbhsg_dcp_disable usbhsg_pipe_disable
796 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
797 {
798         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
799         struct usbhsg_request *ureq;
800         int disable = 0;
801
802         /*
803          *********  assume under spin lock  *********
804          */
805
806         usbhs_pipe_disable(pipe);
807
808         /*
809          * disable pipe irq
810          */
811         usbhsg_irq_empty_ctrl(uep, disable);
812         usbhsg_irq_ready_ctrl(uep, disable);
813
814         while (1) {
815                 ureq = usbhsg_queue_get(uep);
816                 if (!ureq)
817                         break;
818
819                 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
820         }
821
822         return 0;
823 }
824
825 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
826 {
827         int i;
828         struct usbhsg_uep *uep;
829
830         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
831                 uep->pipe = NULL;
832 }
833
834 /*
835  *
836  *              usb_ep_ops
837  *
838  */
839 static int usbhsg_ep_enable(struct usb_ep *ep,
840                          const struct usb_endpoint_descriptor *desc)
841 {
842         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
843         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
844         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
845         struct usbhs_pipe *pipe;
846         spinlock_t *lock;
847         unsigned long flags;
848         int ret = -EIO;
849
850         /*
851          * if it already have pipe,
852          * nothing to do
853          */
854         if (uep->pipe)
855                 return 0;
856
857         /********************  spin lock ********************/
858         lock = usbhsg_trylock(gpriv, &flags);
859
860         pipe = usbhs_pipe_malloc(priv, desc);
861         if (pipe) {
862                 uep->pipe               = pipe;
863                 pipe->mod_private       = uep;
864                 INIT_LIST_HEAD(&uep->list);
865
866                 if (usb_endpoint_dir_in(desc))
867                         uep->handler = &usbhsg_handler_send_packet;
868                 else
869                         uep->handler = &usbhsg_handler_recv_packet;
870
871                 ret = 0;
872         }
873
874         usbhsg_unlock(lock, &flags);
875         /********************  spin unlock ******************/
876
877         return ret;
878 }
879
880 static int usbhsg_ep_disable(struct usb_ep *ep)
881 {
882         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
883         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
884         spinlock_t *lock;
885         unsigned long flags;
886         int ret;
887
888         /********************  spin lock ********************/
889         lock = usbhsg_trylock(gpriv, &flags);
890
891         ret = usbhsg_pipe_disable(uep);
892
893         usbhsg_unlock(lock, &flags);
894         /********************  spin unlock ******************/
895
896         return ret;
897 }
898
899 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
900                                                    gfp_t gfp_flags)
901 {
902         struct usbhsg_request *ureq;
903
904         ureq = kzalloc(sizeof *ureq, gfp_flags);
905         if (!ureq)
906                 return NULL;
907
908         INIT_LIST_HEAD(&ureq->node);
909         return &ureq->req;
910 }
911
912 static void usbhsg_ep_free_request(struct usb_ep *ep,
913                                    struct usb_request *req)
914 {
915         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
916
917         WARN_ON(!list_empty(&ureq->node));
918         kfree(ureq);
919 }
920
921 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
922                           gfp_t gfp_flags)
923 {
924         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
925         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
926         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
927         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
928         spinlock_t *lock;
929         unsigned long flags;
930         int ret = 0;
931
932         /*
933          * CAUTION [*endpoint queue*]
934          *
935          * This function will be called from usb_request :: complete
936          * or usb driver timing.
937          * If this function is called from usb_request :: complete,
938          * it is already under spinlock on this driver.
939          * but it is called frm usb driver, this function should call spinlock.
940          *
941          * This function is using usbshg_trylock to solve this issue.
942          * if "is_locked" is 1, this mean this function lock it.
943          * but if it is 0, this mean it is already under spin lock.
944          * see also
945          *   CAUTION [*queue handler*]
946          *   CAUTION [*request complete*]
947          */
948
949         /********************  spin lock ********************/
950         lock = usbhsg_trylock(gpriv, &flags);
951
952         /* param check */
953         if (usbhsg_is_not_connected(gpriv)      ||
954             unlikely(!gpriv->driver)            ||
955             unlikely(!pipe))
956                 ret = -ESHUTDOWN;
957         else
958                 usbhsg_queue_push(uep, ureq);
959
960         usbhsg_unlock(lock, &flags);
961         /********************  spin unlock ******************/
962
963         usbhsg_queue_prepare(uep);
964
965         return ret;
966 }
967
968 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
969 {
970         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
971         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
972         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
973         spinlock_t *lock;
974         unsigned long flags;
975
976         /*
977          * see
978          *   CAUTION [*queue handler*]
979          *   CAUTION [*endpoint queue*]
980          *   CAUTION [*request complete*]
981          */
982
983         /********************  spin lock ********************/
984         lock = usbhsg_trylock(gpriv, &flags);
985
986         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
987
988         usbhsg_unlock(lock, &flags);
989         /********************  spin unlock ******************/
990
991         return 0;
992 }
993
994 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
995 {
996         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
997         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
998         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
999         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1000         spinlock_t *lock;
1001         unsigned long flags;
1002         int ret = -EAGAIN;
1003
1004         /*
1005          * see
1006          *   CAUTION [*queue handler*]
1007          *   CAUTION [*endpoint queue*]
1008          *   CAUTION [*request complete*]
1009          */
1010
1011         /********************  spin lock ********************/
1012         lock = usbhsg_trylock(gpriv, &flags);
1013         if (!usbhsg_queue_get(uep)) {
1014
1015                 dev_dbg(dev, "set halt %d (pipe %d)\n",
1016                         halt, usbhs_pipe_number(pipe));
1017
1018                 if (halt)
1019                         usbhs_pipe_stall(pipe);
1020                 else
1021                         usbhs_pipe_disable(pipe);
1022
1023                 if (halt && wedge)
1024                         usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
1025                 else
1026                         usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
1027
1028                 ret = 0;
1029         }
1030
1031         usbhsg_unlock(lock, &flags);
1032         /********************  spin unlock ******************/
1033
1034         return ret;
1035 }
1036
1037 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
1038 {
1039         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
1040 }
1041
1042 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
1043 {
1044         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
1045 }
1046
1047 static struct usb_ep_ops usbhsg_ep_ops = {
1048         .enable         = usbhsg_ep_enable,
1049         .disable        = usbhsg_ep_disable,
1050
1051         .alloc_request  = usbhsg_ep_alloc_request,
1052         .free_request   = usbhsg_ep_free_request,
1053
1054         .queue          = usbhsg_ep_queue,
1055         .dequeue        = usbhsg_ep_dequeue,
1056
1057         .set_halt       = usbhsg_ep_set_halt,
1058         .set_wedge      = usbhsg_ep_set_wedge,
1059 };
1060
1061 /*
1062  *              usb module start/end
1063  */
1064 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
1065 {
1066         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1067         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1068         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1069         struct device *dev = usbhs_priv_to_dev(priv);
1070         spinlock_t *lock;
1071         unsigned long flags;
1072
1073         /********************  spin lock ********************/
1074         lock = usbhsg_trylock(gpriv, &flags);
1075
1076         /*
1077          * enable interrupt and systems if ready
1078          */
1079         usbhsg_status_set(gpriv, status);
1080         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1081               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
1082                 goto usbhsg_try_start_unlock;
1083
1084         dev_dbg(dev, "start gadget\n");
1085
1086         /*
1087          * pipe initialize and enable DCP
1088          */
1089         usbhs_pipe_init(priv);
1090         usbhsg_uep_init(gpriv);
1091         usbhsg_dcp_enable(dcp);
1092
1093         /*
1094          * system config enble
1095          * - HI speed
1096          * - function
1097          * - usb module
1098          */
1099         usbhs_sys_hispeed_ctrl(priv, 1);
1100         usbhs_sys_function_ctrl(priv, 1);
1101         usbhs_sys_usb_ctrl(priv, 1);
1102
1103         /*
1104          * enable irq callback
1105          */
1106         mod->irq_dev_state      = usbhsg_irq_dev_state;
1107         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
1108         mod->irq_empty          = usbhsg_irq_empty;
1109         mod->irq_ready          = usbhsg_irq_ready;
1110         mod->irq_bempsts        = 0;
1111         mod->irq_brdysts        = 0;
1112         usbhs_irq_callback_update(priv, mod);
1113
1114 usbhsg_try_start_unlock:
1115         usbhsg_unlock(lock, &flags);
1116         /********************  spin unlock ********************/
1117
1118         return 0;
1119 }
1120
1121 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
1122 {
1123         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1124         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1125         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
1126         struct device *dev = usbhs_priv_to_dev(priv);
1127         spinlock_t *lock;
1128         unsigned long flags;
1129
1130         /********************  spin lock ********************/
1131         lock = usbhsg_trylock(gpriv, &flags);
1132
1133         /*
1134          * disable interrupt and systems if 1st try
1135          */
1136         usbhsg_status_clr(gpriv, status);
1137         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
1138             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
1139                 goto usbhsg_try_stop_unlock;
1140
1141         /* disable all irq */
1142         mod->irq_dev_state      = NULL;
1143         mod->irq_ctrl_stage     = NULL;
1144         mod->irq_empty          = NULL;
1145         mod->irq_ready          = NULL;
1146         mod->irq_bempsts        = 0;
1147         mod->irq_brdysts        = 0;
1148         usbhs_irq_callback_update(priv, mod);
1149
1150         usbhsg_dcp_disable(dcp);
1151
1152         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
1153
1154         /* disable sys */
1155         usbhs_sys_hispeed_ctrl(priv, 0);
1156         usbhs_sys_function_ctrl(priv, 0);
1157         usbhs_sys_usb_ctrl(priv, 0);
1158
1159         usbhsg_unlock(lock, &flags);
1160         /********************  spin unlock ********************/
1161
1162         if (gpriv->driver &&
1163             gpriv->driver->disconnect)
1164                 gpriv->driver->disconnect(&gpriv->gadget);
1165
1166         dev_dbg(dev, "stop gadget\n");
1167
1168         return 0;
1169
1170 usbhsg_try_stop_unlock:
1171         usbhsg_unlock(lock, &flags);
1172
1173         return 0;
1174 }
1175
1176 /*
1177  *
1178  *              linux usb function
1179  *
1180  */
1181 struct usbhsg_gpriv *the_controller;
1182 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1183                             int (*bind)(struct usb_gadget *))
1184 {
1185         struct usbhsg_gpriv *gpriv = the_controller;
1186         struct usbhs_priv *priv;
1187         struct device *dev;
1188         int ret;
1189
1190         if (!bind               ||
1191             !driver             ||
1192             !driver->setup      ||
1193             driver->speed != USB_SPEED_HIGH)
1194                 return -EINVAL;
1195         if (!gpriv)
1196                 return -ENODEV;
1197         if (gpriv->driver)
1198                 return -EBUSY;
1199
1200         dev  = usbhsg_gpriv_to_dev(gpriv);
1201         priv = usbhsg_gpriv_to_priv(gpriv);
1202
1203         /* first hook up the driver ... */
1204         gpriv->driver = driver;
1205         gpriv->gadget.dev.driver = &driver->driver;
1206
1207         ret = device_add(&gpriv->gadget.dev);
1208         if (ret) {
1209                 dev_err(dev, "device_add error %d\n", ret);
1210                 goto add_fail;
1211         }
1212
1213         ret = bind(&gpriv->gadget);
1214         if (ret) {
1215                 dev_err(dev, "bind to driver %s error %d\n",
1216                         driver->driver.name, ret);
1217                 goto bind_fail;
1218         }
1219
1220         dev_dbg(dev, "bind %s\n", driver->driver.name);
1221
1222         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
1223
1224 bind_fail:
1225         device_del(&gpriv->gadget.dev);
1226 add_fail:
1227         gpriv->driver = NULL;
1228         gpriv->gadget.dev.driver = NULL;
1229
1230         return ret;
1231 }
1232 EXPORT_SYMBOL(usb_gadget_probe_driver);
1233
1234 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1235 {
1236         struct usbhsg_gpriv *gpriv = the_controller;
1237         struct usbhs_priv *priv;
1238         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
1239
1240         if (!gpriv)
1241                 return -ENODEV;
1242
1243         if (!driver             ||
1244             !driver->unbind     ||
1245             driver != gpriv->driver)
1246                 return -EINVAL;
1247
1248         dev  = usbhsg_gpriv_to_dev(gpriv);
1249         priv = usbhsg_gpriv_to_priv(gpriv);
1250
1251         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
1252         device_del(&gpriv->gadget.dev);
1253         gpriv->driver = NULL;
1254
1255         if (driver->disconnect)
1256                 driver->disconnect(&gpriv->gadget);
1257
1258         driver->unbind(&gpriv->gadget);
1259         dev_dbg(dev, "unbind %s\n", driver->driver.name);
1260
1261         return 0;
1262 }
1263 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1264
1265 /*
1266  *              usb gadget ops
1267  */
1268 static int usbhsg_get_frame(struct usb_gadget *gadget)
1269 {
1270         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1271         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1272
1273         return usbhs_frame_get_num(priv);
1274 }
1275
1276 static struct usb_gadget_ops usbhsg_gadget_ops = {
1277         .get_frame              = usbhsg_get_frame,
1278 };
1279
1280 static int usbhsg_start(struct usbhs_priv *priv)
1281 {
1282         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1283 }
1284
1285 static int usbhsg_stop(struct usbhs_priv *priv)
1286 {
1287         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1288 }
1289
1290 int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1291 {
1292         struct usbhsg_gpriv *gpriv;
1293         struct usbhsg_uep *uep;
1294         struct device *dev = usbhs_priv_to_dev(priv);
1295         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1296         int i;
1297
1298         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1299         if (!gpriv) {
1300                 dev_err(dev, "Could not allocate gadget priv\n");
1301                 return -ENOMEM;
1302         }
1303
1304         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
1305         if (!uep) {
1306                 dev_err(dev, "Could not allocate ep\n");
1307                 goto usbhs_mod_gadget_probe_err_gpriv;
1308         }
1309
1310         /*
1311          * CAUTION
1312          *
1313          * There is no guarantee that it is possible to access usb module here.
1314          * Don't accesses to it.
1315          * The accesse will be enable after "usbhsg_start"
1316          */
1317
1318         /*
1319          * register itself
1320          */
1321         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1322
1323         /* init gpriv */
1324         gpriv->mod.name         = "gadget";
1325         gpriv->mod.start        = usbhsg_start;
1326         gpriv->mod.stop         = usbhsg_stop;
1327         gpriv->uep              = uep;
1328         gpriv->uep_size         = pipe_size;
1329         usbhsg_status_init(gpriv);
1330
1331         /*
1332          * init gadget
1333          */
1334         device_initialize(&gpriv->gadget.dev);
1335         dev_set_name(&gpriv->gadget.dev, "gadget");
1336         gpriv->gadget.dev.parent        = dev;
1337         gpriv->gadget.name              = "renesas_usbhs_udc";
1338         gpriv->gadget.ops               = &usbhsg_gadget_ops;
1339         gpriv->gadget.is_dualspeed      = 1;
1340
1341         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1342
1343         /*
1344          * init usb_ep
1345          */
1346         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1347                 uep->gpriv      = gpriv;
1348                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1349
1350                 uep->ep.name            = uep->ep_name;
1351                 uep->ep.ops             = &usbhsg_ep_ops;
1352                 INIT_LIST_HEAD(&uep->ep.ep_list);
1353                 INIT_LIST_HEAD(&uep->list);
1354
1355                 /* init DCP */
1356                 if (usbhsg_is_dcp(uep)) {
1357                         gpriv->gadget.ep0 = &uep->ep;
1358                         uep->ep.maxpacket = 64;
1359                 }
1360                 /* init normal pipe */
1361                 else {
1362                         uep->ep.maxpacket = 512;
1363                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1364                 }
1365         }
1366
1367         the_controller = gpriv;
1368
1369         dev_info(dev, "gadget probed\n");
1370
1371         return 0;
1372
1373 usbhs_mod_gadget_probe_err_gpriv:
1374         kfree(gpriv);
1375
1376         return -ENOMEM;
1377 }
1378
1379 void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1380 {
1381         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1382
1383         kfree(gpriv);
1384 }