Linux 3.8-rc2
[~shefty/rdma-dev.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/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/io.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/usb/ch9.h>
23 #include <linux/usb/gadget.h>
24 #include "common.h"
25
26 /*
27  *              struct
28  */
29 struct usbhsg_request {
30         struct usb_request      req;
31         struct usbhs_pkt        pkt;
32 };
33
34 #define EP_NAME_SIZE 8
35 struct usbhsg_gpriv;
36 struct usbhsg_uep {
37         struct usb_ep            ep;
38         struct usbhs_pipe       *pipe;
39
40         char ep_name[EP_NAME_SIZE];
41
42         struct usbhsg_gpriv *gpriv;
43 };
44
45 struct usbhsg_gpriv {
46         struct usb_gadget        gadget;
47         struct usbhs_mod         mod;
48
49         struct usbhsg_uep       *uep;
50         int                      uep_size;
51
52         struct usb_gadget_driver        *driver;
53
54         u32     status;
55 #define USBHSG_STATUS_STARTED           (1 << 0)
56 #define USBHSG_STATUS_REGISTERD         (1 << 1)
57 #define USBHSG_STATUS_WEDGE             (1 << 2)
58 #define USBHSG_STATUS_SELF_POWERED      (1 << 3)
59 };
60
61 struct usbhsg_recip_handle {
62         char *name;
63         int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
64                       struct usb_ctrlrequest *ctrl);
65         int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
66                          struct usb_ctrlrequest *ctrl);
67         int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
68                         struct usb_ctrlrequest *ctrl);
69 };
70
71 /*
72  *              macro
73  */
74 #define usbhsg_priv_to_gpriv(priv)                      \
75         container_of(                                   \
76                 usbhs_mod_get(priv, USBHS_GADGET),      \
77                 struct usbhsg_gpriv, mod)
78
79 #define __usbhsg_for_each_uep(start, pos, g, i) \
80         for (i = start, pos = (g)->uep + i;     \
81              i < (g)->uep_size;                 \
82              i++, pos = (g)->uep + i)
83
84 #define usbhsg_for_each_uep(pos, gpriv, i)      \
85         __usbhsg_for_each_uep(1, pos, gpriv, i)
86
87 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)     \
88         __usbhsg_for_each_uep(0, pos, gpriv, i)
89
90 #define usbhsg_gadget_to_gpriv(g)\
91         container_of(g, struct usbhsg_gpriv, gadget)
92
93 #define usbhsg_req_to_ureq(r)\
94         container_of(r, struct usbhsg_request, req)
95
96 #define usbhsg_ep_to_uep(e)             container_of(e, struct usbhsg_uep, ep)
97 #define usbhsg_gpriv_to_dev(gp)         usbhs_priv_to_dev((gp)->mod.priv)
98 #define usbhsg_gpriv_to_priv(gp)        ((gp)->mod.priv)
99 #define usbhsg_gpriv_to_dcp(gp)         ((gp)->uep)
100 #define usbhsg_gpriv_to_nth_uep(gp, i)  ((gp)->uep + i)
101 #define usbhsg_uep_to_gpriv(u)          ((u)->gpriv)
102 #define usbhsg_uep_to_pipe(u)           ((u)->pipe)
103 #define usbhsg_pipe_to_uep(p)           ((p)->mod_private)
104 #define usbhsg_is_dcp(u)                ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
105
106 #define usbhsg_ureq_to_pkt(u)           (&(u)->pkt)
107 #define usbhsg_pkt_to_ureq(i)   \
108         container_of(i, struct usbhsg_request, pkt)
109
110 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
111
112 /* status */
113 #define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
114 #define usbhsg_status_set(gp, b) (gp->status |=  b)
115 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
116 #define usbhsg_status_has(gp, b) (gp->status &   b)
117
118 /*
119  *              queue push/pop
120  */
121 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
122                              struct usbhsg_request *ureq,
123                              int status)
124 {
125         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
126         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
127         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
128
129         dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
130
131         ureq->req.status = status;
132         ureq->req.complete(&uep->ep, &ureq->req);
133 }
134
135 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
136 {
137         struct usbhs_pipe *pipe = pkt->pipe;
138         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
139         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
140
141         ureq->req.actual = pkt->actual;
142
143         usbhsg_queue_pop(uep, ureq, 0);
144 }
145
146 static void usbhsg_queue_push(struct usbhsg_uep *uep,
147                               struct usbhsg_request *ureq)
148 {
149         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
150         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
151         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
152         struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
153         struct usb_request *req = &ureq->req;
154
155         req->actual = 0;
156         req->status = -EINPROGRESS;
157         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
158                        req->buf, req->length, req->zero, -1);
159         usbhs_pkt_start(pipe);
160
161         dev_dbg(dev, "pipe %d : queue push (%d)\n",
162                 usbhs_pipe_number(pipe),
163                 req->length);
164 }
165
166 /*
167  *              dma map/unmap
168  */
169 static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
170 {
171         struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
172         struct usb_request *req = &ureq->req;
173         struct usbhs_pipe *pipe = pkt->pipe;
174         struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
175         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
176         enum dma_data_direction dir;
177         int ret = 0;
178
179         dir = usbhs_pipe_is_dir_host(pipe);
180
181         if (map) {
182                 /* it can not use scatter/gather */
183                 WARN_ON(req->num_sgs);
184
185                 ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
186                 if (ret < 0)
187                         return ret;
188
189                 pkt->dma = req->dma;
190         } else {
191                 usb_gadget_unmap_request(&gpriv->gadget, req, dir);
192         }
193
194         return ret;
195 }
196
197 /*
198  *              USB_TYPE_STANDARD / clear feature functions
199  */
200 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
201                                                  struct usbhsg_uep *uep,
202                                                  struct usb_ctrlrequest *ctrl)
203 {
204         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
205         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
206         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
207
208         usbhs_dcp_control_transfer_done(pipe);
209
210         return 0;
211 }
212
213 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
214                                                    struct usbhsg_uep *uep,
215                                                    struct usb_ctrlrequest *ctrl)
216 {
217         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
218         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
219
220         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
221                 usbhs_pipe_disable(pipe);
222                 usbhs_pipe_sequence_data0(pipe);
223                 usbhs_pipe_enable(pipe);
224         }
225
226         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
227
228         usbhs_pkt_start(pipe);
229
230         return 0;
231 }
232
233 struct usbhsg_recip_handle req_clear_feature = {
234         .name           = "clear feature",
235         .device         = usbhsg_recip_handler_std_control_done,
236         .interface      = usbhsg_recip_handler_std_control_done,
237         .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
238 };
239
240 /*
241  *              USB_TYPE_STANDARD / set feature functions
242  */
243 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
244                                                  struct usbhsg_uep *uep,
245                                                  struct usb_ctrlrequest *ctrl)
246 {
247         switch (le16_to_cpu(ctrl->wValue)) {
248         case USB_DEVICE_TEST_MODE:
249                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
250                 udelay(100);
251                 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
252                 break;
253         default:
254                 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
255                 break;
256         }
257
258         return 0;
259 }
260
261 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
262                                                  struct usbhsg_uep *uep,
263                                                  struct usb_ctrlrequest *ctrl)
264 {
265         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
266
267         usbhs_pipe_stall(pipe);
268
269         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
270
271         return 0;
272 }
273
274 struct usbhsg_recip_handle req_set_feature = {
275         .name           = "set feature",
276         .device         = usbhsg_recip_handler_std_set_device,
277         .interface      = usbhsg_recip_handler_std_control_done,
278         .endpoint       = usbhsg_recip_handler_std_set_endpoint,
279 };
280
281 /*
282  *              USB_TYPE_STANDARD / get status functions
283  */
284 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
285                                          struct usb_request *req)
286 {
287         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
288
289         /* free allocated recip-buffer/usb_request */
290         kfree(ureq->pkt.buf);
291         usb_ep_free_request(ep, req);
292 }
293
294 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
295                                        unsigned short status)
296 {
297         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
298         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
299         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
300         struct usb_request *req;
301         unsigned short *buf;
302
303         /* alloc new usb_request for recip */
304         req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
305         if (!req) {
306                 dev_err(dev, "recip request allocation fail\n");
307                 return;
308         }
309
310         /* alloc recip data buffer */
311         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
312         if (!buf) {
313                 usb_ep_free_request(&dcp->ep, req);
314                 dev_err(dev, "recip data allocation fail\n");
315                 return;
316         }
317
318         /* recip data is status */
319         *buf = cpu_to_le16(status);
320
321         /* allocated usb_request/buffer will be freed */
322         req->complete   = __usbhsg_recip_send_complete;
323         req->buf        = buf;
324         req->length     = sizeof(*buf);
325         req->zero       = 0;
326
327         /* push packet */
328         pipe->handler = &usbhs_fifo_pio_push_handler;
329         usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
330 }
331
332 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
333                                                struct usbhsg_uep *uep,
334                                                struct usb_ctrlrequest *ctrl)
335 {
336         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
337         unsigned short status = 0;
338
339         if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
340                 status = 1 << USB_DEVICE_SELF_POWERED;
341
342         __usbhsg_recip_send_status(gpriv, status);
343
344         return 0;
345 }
346
347 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
348                                                   struct usbhsg_uep *uep,
349                                                   struct usb_ctrlrequest *ctrl)
350 {
351         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
352         unsigned short status = 0;
353
354         __usbhsg_recip_send_status(gpriv, status);
355
356         return 0;
357 }
358
359 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
360                                                  struct usbhsg_uep *uep,
361                                                  struct usb_ctrlrequest *ctrl)
362 {
363         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
364         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
365         unsigned short status = 0;
366
367         if (usbhs_pipe_is_stall(pipe))
368                 status = 1 << USB_ENDPOINT_HALT;
369
370         __usbhsg_recip_send_status(gpriv, status);
371
372         return 0;
373 }
374
375 struct usbhsg_recip_handle req_get_status = {
376         .name           = "get status",
377         .device         = usbhsg_recip_handler_std_get_device,
378         .interface      = usbhsg_recip_handler_std_get_interface,
379         .endpoint       = usbhsg_recip_handler_std_get_endpoint,
380 };
381
382 /*
383  *              USB_TYPE handler
384  */
385 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
386                                    struct usbhsg_recip_handle *handler,
387                                    struct usb_ctrlrequest *ctrl)
388 {
389         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
390         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
391         struct usbhsg_uep *uep;
392         struct usbhs_pipe *pipe;
393         int recip = ctrl->bRequestType & USB_RECIP_MASK;
394         int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
395         int ret = 0;
396         int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
397                     struct usb_ctrlrequest *ctrl);
398         char *msg;
399
400         uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
401         pipe = usbhsg_uep_to_pipe(uep);
402         if (!pipe) {
403                 dev_err(dev, "wrong recip request\n");
404                 return -EINVAL;
405         }
406
407         switch (recip) {
408         case USB_RECIP_DEVICE:
409                 msg     = "DEVICE";
410                 func    = handler->device;
411                 break;
412         case USB_RECIP_INTERFACE:
413                 msg     = "INTERFACE";
414                 func    = handler->interface;
415                 break;
416         case USB_RECIP_ENDPOINT:
417                 msg     = "ENDPOINT";
418                 func    = handler->endpoint;
419                 break;
420         default:
421                 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
422                 func = NULL;
423                 ret = -EINVAL;
424         }
425
426         if (func) {
427                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
428                 ret = func(priv, uep, ctrl);
429         }
430
431         return ret;
432 }
433
434 /*
435  *              irq functions
436  *
437  * it will be called from usbhs_interrupt
438  */
439 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
440                                 struct usbhs_irq_state *irq_state)
441 {
442         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
443         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
444
445         gpriv->gadget.speed = usbhs_bus_get_speed(priv);
446
447         dev_dbg(dev, "state = %x : speed : %d\n",
448                 usbhs_status_get_device_state(irq_state),
449                 gpriv->gadget.speed);
450
451         return 0;
452 }
453
454 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
455                                  struct usbhs_irq_state *irq_state)
456 {
457         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
458         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
459         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
460         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
461         struct usb_ctrlrequest ctrl;
462         struct usbhsg_recip_handle *recip_handler = NULL;
463         int stage = usbhs_status_get_ctrl_stage(irq_state);
464         int ret = 0;
465
466         dev_dbg(dev, "stage = %d\n", stage);
467
468         /*
469          * see Manual
470          *
471          *  "Operation"
472          *  - "Interrupt Function"
473          *    - "Control Transfer Stage Transition Interrupt"
474          *      - Fig. "Control Transfer Stage Transitions"
475          */
476
477         switch (stage) {
478         case READ_DATA_STAGE:
479                 pipe->handler = &usbhs_fifo_pio_push_handler;
480                 break;
481         case WRITE_DATA_STAGE:
482                 pipe->handler = &usbhs_fifo_pio_pop_handler;
483                 break;
484         case NODATA_STATUS_STAGE:
485                 pipe->handler = &usbhs_ctrl_stage_end_handler;
486                 break;
487         default:
488                 return ret;
489         }
490
491         /*
492          * get usb request
493          */
494         usbhs_usbreq_get_val(priv, &ctrl);
495
496         switch (ctrl.bRequestType & USB_TYPE_MASK) {
497         case USB_TYPE_STANDARD:
498                 switch (ctrl.bRequest) {
499                 case USB_REQ_CLEAR_FEATURE:
500                         recip_handler = &req_clear_feature;
501                         break;
502                 case USB_REQ_SET_FEATURE:
503                         recip_handler = &req_set_feature;
504                         break;
505                 case USB_REQ_GET_STATUS:
506                         recip_handler = &req_get_status;
507                         break;
508                 }
509         }
510
511         /*
512          * setup stage / run recip
513          */
514         if (recip_handler)
515                 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
516         else
517                 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
518
519         if (ret < 0)
520                 usbhs_pipe_stall(pipe);
521
522         return ret;
523 }
524
525 /*
526  *
527  *              usb_dcp_ops
528  *
529  */
530 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
531 {
532         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
533         struct usbhs_pkt *pkt;
534
535         while (1) {
536                 pkt = usbhs_pkt_pop(pipe, NULL);
537                 if (!pkt)
538                         break;
539
540                 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
541         }
542
543         usbhs_pipe_disable(pipe);
544
545         return 0;
546 }
547
548 static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
549 {
550         int i;
551         struct usbhsg_uep *uep;
552
553         usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
554                 uep->pipe = NULL;
555 }
556
557 /*
558  *
559  *              usb_ep_ops
560  *
561  */
562 static int usbhsg_ep_enable(struct usb_ep *ep,
563                          const struct usb_endpoint_descriptor *desc)
564 {
565         struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
566         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
567         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
568         struct usbhs_pipe *pipe;
569         int ret = -EIO;
570
571         /*
572          * if it already have pipe,
573          * nothing to do
574          */
575         if (uep->pipe) {
576                 usbhs_pipe_clear(uep->pipe);
577                 usbhs_pipe_sequence_data0(uep->pipe);
578                 return 0;
579         }
580
581         pipe = usbhs_pipe_malloc(priv,
582                                  usb_endpoint_type(desc),
583                                  usb_endpoint_dir_in(desc));
584         if (pipe) {
585                 uep->pipe               = pipe;
586                 pipe->mod_private       = uep;
587
588                 /* set epnum / maxp */
589                 usbhs_pipe_config_update(pipe, 0,
590                                          usb_endpoint_num(desc),
591                                          usb_endpoint_maxp(desc));
592
593                 /*
594                  * usbhs_fifo_dma_push/pop_handler try to
595                  * use dmaengine if possible.
596                  * It will use pio handler if impossible.
597                  */
598                 if (usb_endpoint_dir_in(desc))
599                         pipe->handler = &usbhs_fifo_dma_push_handler;
600                 else
601                         pipe->handler = &usbhs_fifo_dma_pop_handler;
602
603                 ret = 0;
604         }
605
606         return ret;
607 }
608
609 static int usbhsg_ep_disable(struct usb_ep *ep)
610 {
611         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
612
613         return usbhsg_pipe_disable(uep);
614 }
615
616 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
617                                                    gfp_t gfp_flags)
618 {
619         struct usbhsg_request *ureq;
620
621         ureq = kzalloc(sizeof *ureq, gfp_flags);
622         if (!ureq)
623                 return NULL;
624
625         usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
626
627         return &ureq->req;
628 }
629
630 static void usbhsg_ep_free_request(struct usb_ep *ep,
631                                    struct usb_request *req)
632 {
633         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
634
635         WARN_ON(!list_empty(&ureq->pkt.node));
636         kfree(ureq);
637 }
638
639 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
640                           gfp_t gfp_flags)
641 {
642         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
643         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
644         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
645         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
646
647         /* param check */
648         if (usbhsg_is_not_connected(gpriv)      ||
649             unlikely(!gpriv->driver)            ||
650             unlikely(!pipe))
651                 return -ESHUTDOWN;
652
653         usbhsg_queue_push(uep, ureq);
654
655         return 0;
656 }
657
658 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
659 {
660         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
661         struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
662         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
663
664         usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
665         usbhsg_queue_pop(uep, ureq, -ECONNRESET);
666
667         return 0;
668 }
669
670 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
671 {
672         struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
673         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
674         struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
675         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
676         struct device *dev = usbhsg_gpriv_to_dev(gpriv);
677         unsigned long flags;
678
679         usbhsg_pipe_disable(uep);
680
681         dev_dbg(dev, "set halt %d (pipe %d)\n",
682                 halt, usbhs_pipe_number(pipe));
683
684         /********************  spin lock ********************/
685         usbhs_lock(priv, flags);
686
687         if (halt)
688                 usbhs_pipe_stall(pipe);
689         else
690                 usbhs_pipe_disable(pipe);
691
692         if (halt && wedge)
693                 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
694         else
695                 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
696
697         usbhs_unlock(priv, flags);
698         /********************  spin unlock ******************/
699
700         return 0;
701 }
702
703 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
704 {
705         return __usbhsg_ep_set_halt_wedge(ep, value, 0);
706 }
707
708 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
709 {
710         return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
711 }
712
713 static struct usb_ep_ops usbhsg_ep_ops = {
714         .enable         = usbhsg_ep_enable,
715         .disable        = usbhsg_ep_disable,
716
717         .alloc_request  = usbhsg_ep_alloc_request,
718         .free_request   = usbhsg_ep_free_request,
719
720         .queue          = usbhsg_ep_queue,
721         .dequeue        = usbhsg_ep_dequeue,
722
723         .set_halt       = usbhsg_ep_set_halt,
724         .set_wedge      = usbhsg_ep_set_wedge,
725 };
726
727 /*
728  *              usb module start/end
729  */
730 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
731 {
732         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
733         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
734         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
735         struct device *dev = usbhs_priv_to_dev(priv);
736         unsigned long flags;
737         int ret = 0;
738
739         /********************  spin lock ********************/
740         usbhs_lock(priv, flags);
741
742         usbhsg_status_set(gpriv, status);
743         if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
744               usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
745                 ret = -1; /* not ready */
746
747         usbhs_unlock(priv, flags);
748         /********************  spin unlock ********************/
749
750         if (ret < 0)
751                 return 0; /* not ready is not error */
752
753         /*
754          * enable interrupt and systems if ready
755          */
756         dev_dbg(dev, "start gadget\n");
757
758         /*
759          * pipe initialize and enable DCP
760          */
761         usbhs_pipe_init(priv,
762                         usbhsg_dma_map_ctrl);
763         usbhs_fifo_init(priv);
764         usbhsg_uep_init(gpriv);
765
766         /* dcp init */
767         dcp->pipe               = usbhs_dcp_malloc(priv);
768         dcp->pipe->mod_private  = dcp;
769         usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
770
771         /*
772          * system config enble
773          * - HI speed
774          * - function
775          * - usb module
776          */
777         usbhs_sys_function_ctrl(priv, 1);
778
779         /*
780          * enable irq callback
781          */
782         mod->irq_dev_state      = usbhsg_irq_dev_state;
783         mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
784         usbhs_irq_callback_update(priv, mod);
785
786         return 0;
787 }
788
789 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
790 {
791         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
792         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
793         struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
794         struct device *dev = usbhs_priv_to_dev(priv);
795         unsigned long flags;
796         int ret = 0;
797
798         /********************  spin lock ********************/
799         usbhs_lock(priv, flags);
800
801         usbhsg_status_clr(gpriv, status);
802         if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
803             !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
804                 ret = -1; /* already done */
805
806         usbhs_unlock(priv, flags);
807         /********************  spin unlock ********************/
808
809         if (ret < 0)
810                 return 0; /* already done is not error */
811
812         /*
813          * disable interrupt and systems if 1st try
814          */
815         usbhs_fifo_quit(priv);
816
817         /* disable all irq */
818         mod->irq_dev_state      = NULL;
819         mod->irq_ctrl_stage     = NULL;
820         usbhs_irq_callback_update(priv, mod);
821
822         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
823
824         /* disable sys */
825         usbhs_sys_set_test_mode(priv, 0);
826         usbhs_sys_function_ctrl(priv, 0);
827
828         usbhsg_pipe_disable(dcp);
829
830         dev_dbg(dev, "stop gadget\n");
831
832         return 0;
833 }
834
835 /*
836  *
837  *              linux usb function
838  *
839  */
840 static int usbhsg_gadget_start(struct usb_gadget *gadget,
841                 struct usb_gadget_driver *driver)
842 {
843         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
844         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
845
846         if (!driver             ||
847             !driver->setup      ||
848             driver->max_speed < USB_SPEED_FULL)
849                 return -EINVAL;
850
851         /* first hook up the driver ... */
852         gpriv->driver = driver;
853         gpriv->gadget.dev.driver = &driver->driver;
854
855         return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
856 }
857
858 static int usbhsg_gadget_stop(struct usb_gadget *gadget,
859                 struct usb_gadget_driver *driver)
860 {
861         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
862         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
863
864         if (!driver             ||
865             !driver->unbind)
866                 return -EINVAL;
867
868         usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
869         gpriv->gadget.dev.driver = NULL;
870         gpriv->driver = NULL;
871
872         return 0;
873 }
874
875 /*
876  *              usb gadget ops
877  */
878 static int usbhsg_get_frame(struct usb_gadget *gadget)
879 {
880         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
881         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
882
883         return usbhs_frame_get_num(priv);
884 }
885
886 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
887 {
888         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
889         struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
890
891         usbhs_sys_function_pullup(priv, is_on);
892
893         return 0;
894 }
895
896 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
897 {
898         struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
899
900         if (is_self)
901                 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
902         else
903                 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
904
905         return 0;
906 }
907
908 static struct usb_gadget_ops usbhsg_gadget_ops = {
909         .get_frame              = usbhsg_get_frame,
910         .set_selfpowered        = usbhsg_set_selfpowered,
911         .udc_start              = usbhsg_gadget_start,
912         .udc_stop               = usbhsg_gadget_stop,
913         .pullup                 = usbhsg_pullup,
914 };
915
916 static int usbhsg_start(struct usbhs_priv *priv)
917 {
918         return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
919 }
920
921 static int usbhsg_stop(struct usbhs_priv *priv)
922 {
923         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
924
925         /* cable disconnect */
926         if (gpriv->driver &&
927             gpriv->driver->disconnect)
928                 gpriv->driver->disconnect(&gpriv->gadget);
929
930         return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
931 }
932
933 static void usbhs_mod_gadget_release(struct device *pdev)
934 {
935         /* do nothing */
936 }
937
938 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
939 {
940         struct usbhsg_gpriv *gpriv;
941         struct usbhsg_uep *uep;
942         struct device *dev = usbhs_priv_to_dev(priv);
943         int pipe_size = usbhs_get_dparam(priv, pipe_size);
944         int i;
945         int ret;
946
947         gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
948         if (!gpriv) {
949                 dev_err(dev, "Could not allocate gadget priv\n");
950                 return -ENOMEM;
951         }
952
953         uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
954         if (!uep) {
955                 dev_err(dev, "Could not allocate ep\n");
956                 ret = -ENOMEM;
957                 goto usbhs_mod_gadget_probe_err_gpriv;
958         }
959
960         /*
961          * CAUTION
962          *
963          * There is no guarantee that it is possible to access usb module here.
964          * Don't accesses to it.
965          * The accesse will be enable after "usbhsg_start"
966          */
967
968         /*
969          * register itself
970          */
971         usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
972
973         /* init gpriv */
974         gpriv->mod.name         = "gadget";
975         gpriv->mod.start        = usbhsg_start;
976         gpriv->mod.stop         = usbhsg_stop;
977         gpriv->uep              = uep;
978         gpriv->uep_size         = pipe_size;
979         usbhsg_status_init(gpriv);
980
981         /*
982          * init gadget
983          */
984         dev_set_name(&gpriv->gadget.dev, "gadget");
985         gpriv->gadget.dev.parent        = dev;
986         gpriv->gadget.dev.release       = usbhs_mod_gadget_release;
987         gpriv->gadget.name              = "renesas_usbhs_udc";
988         gpriv->gadget.ops               = &usbhsg_gadget_ops;
989         gpriv->gadget.max_speed         = USB_SPEED_HIGH;
990         ret = device_register(&gpriv->gadget.dev);
991         if (ret < 0)
992                 goto err_add_udc;
993
994         INIT_LIST_HEAD(&gpriv->gadget.ep_list);
995
996         /*
997          * init usb_ep
998          */
999         usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1000                 uep->gpriv      = gpriv;
1001                 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1002
1003                 uep->ep.name            = uep->ep_name;
1004                 uep->ep.ops             = &usbhsg_ep_ops;
1005                 INIT_LIST_HEAD(&uep->ep.ep_list);
1006
1007                 /* init DCP */
1008                 if (usbhsg_is_dcp(uep)) {
1009                         gpriv->gadget.ep0 = &uep->ep;
1010                         uep->ep.maxpacket = 64;
1011                 }
1012                 /* init normal pipe */
1013                 else {
1014                         uep->ep.maxpacket = 512;
1015                         list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1016                 }
1017         }
1018
1019         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1020         if (ret)
1021                 goto err_register;
1022
1023
1024         dev_info(dev, "gadget probed\n");
1025
1026         return 0;
1027
1028 err_register:
1029         device_unregister(&gpriv->gadget.dev);
1030 err_add_udc:
1031         kfree(gpriv->uep);
1032
1033 usbhs_mod_gadget_probe_err_gpriv:
1034         kfree(gpriv);
1035
1036         return ret;
1037 }
1038
1039 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1040 {
1041         struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1042
1043         usb_del_gadget_udc(&gpriv->gadget);
1044
1045         device_unregister(&gpriv->gadget.dev);
1046
1047         kfree(gpriv->uep);
1048         kfree(gpriv);
1049 }