4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
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
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/usb/ch9.h>
21 #include <linux/usb/gadget.h>
27 struct usbhsg_request
{
28 struct usb_request req
;
29 struct list_head node
;
32 #define EP_NAME_SIZE 8
34 struct usbhsg_pipe_handle
;
37 struct usbhs_pipe
*pipe
;
38 struct list_head list
;
40 char ep_name
[EP_NAME_SIZE
];
42 struct usbhsg_gpriv
*gpriv
;
43 struct usbhsg_pipe_handle
*handler
;
47 struct usb_gadget gadget
;
50 struct usbhsg_uep
*uep
;
53 struct usb_gadget_driver
*driver
;
56 #define USBHSG_STATUS_STARTED (1 << 0)
57 #define USBHSG_STATUS_REGISTERD (1 << 1)
58 #define USBHSG_STATUS_WEDGE (1 << 2)
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
);
67 struct usbhsg_recip_handle
{
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
);
80 #define usbhsg_priv_to_gpriv(priv) \
82 usbhs_mod_get(priv, USBHS_GADGET), \
83 struct usbhsg_gpriv, mod)
85 #define __usbhsg_for_each_uep(start, pos, g, i) \
86 for (i = start, pos = (g)->uep; \
88 i++, pos = (g)->uep + i)
90 #define usbhsg_for_each_uep(pos, gpriv, i) \
91 __usbhsg_for_each_uep(1, pos, gpriv, i)
93 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
94 __usbhsg_for_each_uep(0, pos, gpriv, i)
96 #define usbhsg_gadget_to_gpriv(g)\
97 container_of(g, struct usbhsg_gpriv, gadget)
99 #define usbhsg_req_to_ureq(r)\
100 container_of(r, struct usbhsg_request, req)
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))
113 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
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)
124 * This driver don't use spin_try_lock
125 * to avoid warning of CONFIG_DEBUG_SPINLOCK
127 static spinlock_t
*usbhsg_trylock(struct usbhsg_gpriv
*gpriv
,
128 unsigned long *flags
)
130 spinlock_t
*lock
= usbhsg_gpriv_to_lock(gpriv
);
132 /* check spin lock status
133 * to avoid deadlock/nest */
134 if (spin_is_locked(lock
))
137 spin_lock_irqsave(lock
, *flags
);
142 static void usbhsg_unlock(spinlock_t
*lock
, unsigned long *flags
)
147 spin_unlock_irqrestore(lock
, *flags
);
153 static void usbhsg_queue_push(struct usbhsg_uep
*uep
,
154 struct usbhsg_request
*ureq
)
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
);
161 ********* assume under spin lock *********
163 list_del_init(&ureq
->node
);
164 list_add_tail(&ureq
->node
, &uep
->list
);
165 ureq
->req
.actual
= 0;
166 ureq
->req
.status
= -EINPROGRESS
;
168 dev_dbg(dev
, "pipe %d : queue push (%d)\n",
169 usbhs_pipe_number(pipe
),
173 static struct usbhsg_request
*usbhsg_queue_get(struct usbhsg_uep
*uep
)
176 ********* assume under spin lock *********
178 if (list_empty(&uep
->list
))
181 return list_entry(uep
->list
.next
, struct usbhsg_request
, node
);
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
)
188 struct usbhsg_gpriv
*gpriv
= usbhsg_uep_to_gpriv(uep
);
189 struct device
*dev
= usbhsg_gpriv_to_dev(gpriv
);
190 struct usbhsg_request
*ureq
;
196 dev_err(dev
, "no handler function\n");
201 * CAUTION [*queue handler*]
203 * This function will be called for start/restart queue operation.
204 * OTOH the most much worry for USB driver is spinlock nest.
206 * - usb_ep_ops :: queue
207 * - usb_request :: complete
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.
214 * CAUTION [*endpoint queue*]
215 * CAUTION [*request complete*]
218 /****************** spin try lock *******************/
219 lock
= usbhsg_trylock(gpriv
, &flags
);
221 ureq
= usbhsg_queue_get(uep
);
224 ret
= uep
->handler
->prepare(uep
, ureq
);
226 ret
= uep
->handler
->try_run(uep
, ureq
);
228 usbhsg_unlock(lock
, &flags
);
229 /******************** spin unlock ******************/
234 static void usbhsg_queue_pop(struct usbhsg_uep
*uep
,
235 struct usbhsg_request
*ureq
,
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
);
243 ********* assume under spin lock *********
247 * CAUTION [*request complete*]
249 * There is a possibility not to be called in correct order
250 * if "complete" is called without spinlock.
252 * So, this function assume it is under spinlock,
253 * and call usb_request :: complete.
255 * But this "complete" will push next usb_request.
256 * It mean "usb_ep_ops :: queue" which is using spinlock is called
259 * To avoid dead-lock, this driver is using usbhsg_trylock.
260 * CAUTION [*endpoint queue*]
261 * CAUTION [*queue handler*]
264 dev_dbg(dev
, "pipe %d : queue pop\n", usbhs_pipe_number(pipe
));
266 list_del_init(&ureq
->node
);
268 ureq
->req
.status
= status
;
269 ureq
->req
.complete(&uep
->ep
, &ureq
->req
);
273 usbhsg_queue_prepare(uep
);
277 * irq enable/disable function
279 #define usbhsg_irq_callback_ctrl(uep, status, enable) \
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); \
288 mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
290 mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
291 usbhs_irq_callback_update(priv, mod); \
294 static void usbhsg_irq_empty_ctrl(struct usbhsg_uep
*uep
, int enable
)
296 usbhsg_irq_callback_ctrl(uep
, bempsts
, enable
);
299 static void usbhsg_irq_ready_ctrl(struct usbhsg_uep
*uep
, int enable
)
301 usbhsg_irq_callback_ctrl(uep
, brdysts
, enable
);
307 static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep
*uep
,
308 struct usbhsg_request
*ureq
)
310 struct usbhs_pipe
*pipe
= usbhsg_uep_to_pipe(uep
);
313 ********* assume under spin lock *********
316 usbhs_dcp_control_transfer_done(pipe
);
317 usbhsg_queue_pop(uep
, ureq
, 0);
322 static int usbhsg_try_run_send_packet(struct usbhsg_uep
*uep
,
323 struct usbhsg_request
*ureq
)
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
);
336 ********* assume under spin lock *********
339 maxp
= usbhs_pipe_get_maxpacket(pipe
);
340 buf
= req
->buf
+ req
->actual
;
341 remainder
= req
->length
- req
->actual
;
343 send
= usbhs_fifo_write(pipe
, buf
, remainder
);
346 * send < 0 : pipe busy
347 * send = 0 : send zero packet
348 * send > 0 : send data
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 */
361 is_done
= !req
->zero
; /* send zero packet ? */
363 dev_dbg(dev
, " send %d (%d/ %d/ %d/ %d)\n",
364 usbhs_pipe_number(pipe
),
365 remainder
, send
, is_done
, req
->zero
);
368 * enable interrupt and send again in irq handler
369 * if it still have remainder data which should be sent.
372 uep
->handler
->irq_mask(uep
, enable
);
375 * usbhs_fifo_enable execute
376 * - after callback_update,
377 * - before queue_pop / stage_end
379 usbhs_fifo_enable(pipe
);
382 * all data were sent ?
385 /* it care below call in
387 if (usbhsg_is_dcp(uep
))
388 usbhs_dcp_control_transfer_done(pipe
);
390 usbhsg_queue_pop(uep
, ureq
, 0);
396 static int usbhsg_prepare_send_packet(struct usbhsg_uep
*uep
,
397 struct usbhsg_request
*ureq
)
399 struct usbhs_pipe
*pipe
= usbhsg_uep_to_pipe(uep
);
402 ********* assume under spin lock *********
405 usbhs_fifo_prepare_write(pipe
);
406 usbhsg_try_run_send_packet(uep
, ureq
);
411 static int usbhsg_try_run_receive_packet(struct usbhsg_uep
*uep
,
412 struct usbhsg_request
*ureq
)
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
);
424 ********* assume under spin lock *********
427 maxp
= usbhs_pipe_get_maxpacket(pipe
);
428 buf
= req
->buf
+ req
->actual
;
429 remainder
= req
->length
- req
->actual
;
431 recv
= usbhs_fifo_read(pipe
, buf
, remainder
);
433 * recv < 0 : pipe busy
434 * recv >= 0 : receive data
441 /* update parameters */
444 if ((recv
== remainder
) || /* receive all data */
445 (recv
< maxp
)) /* short packet */
448 dev_dbg(dev
, " recv %d (%d/ %d/ %d/ %d)\n",
449 usbhs_pipe_number(pipe
),
450 remainder
, recv
, is_done
, req
->zero
);
452 /* read all data ? */
456 uep
->handler
->irq_mask(uep
, disable
);
457 usbhs_fifo_disable(pipe
);
458 usbhsg_queue_pop(uep
, ureq
, 0);
464 static int usbhsg_prepare_receive_packet(struct usbhsg_uep
*uep
,
465 struct usbhsg_request
*ureq
)
467 struct usbhs_pipe
*pipe
= usbhsg_uep_to_pipe(uep
);
472 ********* assume under spin lock *********
475 ret
= usbhs_fifo_prepare_read(pipe
);
480 * data will be read in interrupt handler
482 uep
->handler
->irq_mask(uep
, enable
);
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
,
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
,
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
,
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
,
511 * DCP pipe can NOT use "ready interrupt" for "send"
512 * it should use "empty" interrupt.
514 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
516 * on the other hand, normal pipe can use "ready interrupt" for "send"
517 * even though it is single/double buffer
519 #define usbhsg_handler_send_ctrl usbhsg_handler_send_by_empty
520 #define usbhsg_handler_recv_ctrl usbhsg_handler_recv_by_ready
522 #define usbhsg_handler_send_packet usbhsg_handler_send_by_ready
523 #define usbhsg_handler_recv_packet usbhsg_handler_recv_by_ready
526 * USB_TYPE_STANDARD / clear feature functions
528 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv
*priv
,
529 struct usbhsg_uep
*uep
,
530 struct usb_ctrlrequest
*ctrl
)
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
);
536 usbhs_dcp_control_transfer_done(pipe
);
541 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv
*priv
,
542 struct usbhsg_uep
*uep
,
543 struct usb_ctrlrequest
*ctrl
)
545 struct usbhsg_gpriv
*gpriv
= usbhsg_uep_to_gpriv(uep
);
546 struct usbhs_pipe
*pipe
= usbhsg_uep_to_pipe(uep
);
548 if (!usbhsg_status_has(gpriv
, USBHSG_STATUS_WEDGE
)) {
549 usbhs_fifo_disable(pipe
);
550 usbhs_pipe_clear_sequence(pipe
);
551 usbhs_fifo_enable(pipe
);
554 usbhsg_recip_handler_std_control_done(priv
, uep
, ctrl
);
556 usbhsg_queue_prepare(uep
);
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
,
571 static int usbhsg_recip_run_handle(struct usbhs_priv
*priv
,
572 struct usbhsg_recip_handle
*handler
,
573 struct usb_ctrlrequest
*ctrl
)
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
;
581 int (*func
)(struct usbhs_priv
*priv
, struct usbhsg_uep
*uep
,
582 struct usb_ctrlrequest
*ctrl
);
585 uep
= usbhsg_gpriv_to_nth_uep(gpriv
, nth
);
586 if (!usbhsg_uep_to_pipe(uep
)) {
587 dev_err(dev
, "wrong recip request\n");
592 case USB_RECIP_DEVICE
:
594 func
= handler
->device
;
596 case USB_RECIP_INTERFACE
:
598 func
= handler
->interface
;
600 case USB_RECIP_ENDPOINT
:
602 func
= handler
->endpoint
;
605 dev_warn(dev
, "unsupported RECIP(%d)\n", recip
);
611 dev_dbg(dev
, "%s (pipe %d :%s)\n", handler
->name
, nth
, msg
);
612 ret
= func(priv
, uep
, ctrl
);
621 * it will be called from usbhs_interrupt
623 static int usbhsg_irq_dev_state(struct usbhs_priv
*priv
,
624 struct usbhs_irq_state
*irq_state
)
626 struct usbhsg_gpriv
*gpriv
= usbhsg_priv_to_gpriv(priv
);
627 struct device
*dev
= usbhsg_gpriv_to_dev(gpriv
);
629 gpriv
->gadget
.speed
= usbhs_status_get_usb_speed(irq_state
);
631 dev_dbg(dev
, "state = %x : speed : %d\n",
632 usbhs_status_get_device_state(irq_state
),
633 gpriv
->gadget
.speed
);
638 static int usbhsg_irq_ctrl_stage(struct usbhs_priv
*priv
,
639 struct usbhs_irq_state
*irq_state
)
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
);
650 dev_dbg(dev
, "stage = %d\n", stage
);
656 * - "Interrupt Function"
657 * - "Control Transfer Stage Transition Interrupt"
658 * - Fig. "Control Transfer Stage Transitions"
662 case READ_DATA_STAGE
:
663 dcp
->handler
= &usbhsg_handler_send_ctrl
;
665 case WRITE_DATA_STAGE
:
666 dcp
->handler
= &usbhsg_handler_recv_ctrl
;
668 case NODATA_STATUS_STAGE
:
669 dcp
->handler
= &usbhsg_handler_ctrl_stage_end
;
678 usbhs_usbreq_get_val(priv
, &ctrl
);
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
;
690 * setup stage / run recip
693 ret
= usbhsg_recip_run_handle(priv
, recip_handler
, &ctrl
);
695 ret
= gpriv
->driver
->setup(&gpriv
->gadget
, &ctrl
);
698 usbhs_fifo_stall(pipe
);
703 static int usbhsg_irq_empty(struct usbhs_priv
*priv
,
704 struct usbhs_irq_state
*irq_state
)
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
);
712 if (!irq_state
->bempsts
) {
713 dev_err(dev
, "debug %s !!\n", __func__
);
717 dev_dbg(dev
, "irq empty [0x%04x]\n", irq_state
->bempsts
);
720 * search interrupted "pipe"
723 usbhs_for_each_pipe_with_dcp(pipe
, priv
, i
) {
724 if (!(irq_state
->bempsts
& (1 << i
)))
727 uep
= usbhsg_pipe_to_uep(pipe
);
728 ret
= usbhsg_queue_handle(uep
);
730 dev_err(dev
, "send error %d : %d\n", i
, ret
);
736 static int usbhsg_irq_ready(struct usbhs_priv
*priv
,
737 struct usbhs_irq_state
*irq_state
)
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
);
745 if (!irq_state
->brdysts
) {
746 dev_err(dev
, "debug %s !!\n", __func__
);
750 dev_dbg(dev
, "irq ready [0x%04x]\n", irq_state
->brdysts
);
753 * search interrupted "pipe"
756 usbhs_for_each_pipe_with_dcp(pipe
, priv
, i
) {
757 if (!(irq_state
->brdysts
& (1 << i
)))
760 uep
= usbhsg_pipe_to_uep(pipe
);
761 ret
= usbhsg_queue_handle(uep
);
763 dev_err(dev
, "receive error %d : %d\n", i
, ret
);
774 static int usbhsg_dcp_enable(struct usbhsg_uep
*uep
)
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
;
781 ********* assume under spin lock *********
784 pipe
= usbhs_dcp_malloc(priv
);
789 uep
->pipe
->mod_private
= uep
;
790 INIT_LIST_HEAD(&uep
->list
);
795 #define usbhsg_dcp_disable usbhsg_pipe_disable
796 static int usbhsg_pipe_disable(struct usbhsg_uep
*uep
)
798 struct usbhs_pipe
*pipe
= usbhsg_uep_to_pipe(uep
);
799 struct usbhsg_request
*ureq
;
803 ********* assume under spin lock *********
806 usbhs_fifo_disable(pipe
);
811 usbhsg_irq_empty_ctrl(uep
, disable
);
812 usbhsg_irq_ready_ctrl(uep
, disable
);
815 ureq
= usbhsg_queue_get(uep
);
819 usbhsg_queue_pop(uep
, ureq
, -ECONNRESET
);
825 static void usbhsg_uep_init(struct usbhsg_gpriv
*gpriv
)
828 struct usbhsg_uep
*uep
;
830 usbhsg_for_each_uep_with_dcp(uep
, gpriv
, i
)
839 static int usbhsg_ep_enable(struct usb_ep
*ep
,
840 const struct usb_endpoint_descriptor
*desc
)
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
;
851 * if it already have pipe,
857 /******************** spin lock ********************/
858 lock
= usbhsg_trylock(gpriv
, &flags
);
860 pipe
= usbhs_pipe_malloc(priv
, desc
);
863 pipe
->mod_private
= uep
;
864 INIT_LIST_HEAD(&uep
->list
);
866 if (usb_endpoint_dir_in(desc
))
867 uep
->handler
= &usbhsg_handler_send_packet
;
869 uep
->handler
= &usbhsg_handler_recv_packet
;
874 usbhsg_unlock(lock
, &flags
);
875 /******************** spin unlock ******************/
880 static int usbhsg_ep_disable(struct usb_ep
*ep
)
882 struct usbhsg_uep
*uep
= usbhsg_ep_to_uep(ep
);
883 struct usbhsg_gpriv
*gpriv
= usbhsg_uep_to_gpriv(uep
);
888 /******************** spin lock ********************/
889 lock
= usbhsg_trylock(gpriv
, &flags
);
891 ret
= usbhsg_pipe_disable(uep
);
893 usbhsg_unlock(lock
, &flags
);
894 /******************** spin unlock ******************/
899 static struct usb_request
*usbhsg_ep_alloc_request(struct usb_ep
*ep
,
902 struct usbhsg_request
*ureq
;
904 ureq
= kzalloc(sizeof *ureq
, gfp_flags
);
908 INIT_LIST_HEAD(&ureq
->node
);
912 static void usbhsg_ep_free_request(struct usb_ep
*ep
,
913 struct usb_request
*req
)
915 struct usbhsg_request
*ureq
= usbhsg_req_to_ureq(req
);
917 WARN_ON(!list_empty(&ureq
->node
));
921 static int usbhsg_ep_queue(struct usb_ep
*ep
, struct usb_request
*req
,
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
);
933 * CAUTION [*endpoint queue*]
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.
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.
945 * CAUTION [*queue handler*]
946 * CAUTION [*request complete*]
949 /******************** spin lock ********************/
950 lock
= usbhsg_trylock(gpriv
, &flags
);
953 if (usbhsg_is_not_connected(gpriv
) ||
954 unlikely(!gpriv
->driver
) ||
958 usbhsg_queue_push(uep
, ureq
);
960 usbhsg_unlock(lock
, &flags
);
961 /******************** spin unlock ******************/
963 usbhsg_queue_prepare(uep
);
968 static int usbhsg_ep_dequeue(struct usb_ep
*ep
, struct usb_request
*req
)
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
);
978 * CAUTION [*queue handler*]
979 * CAUTION [*endpoint queue*]
980 * CAUTION [*request complete*]
983 /******************** spin lock ********************/
984 lock
= usbhsg_trylock(gpriv
, &flags
);
986 usbhsg_queue_pop(uep
, ureq
, -ECONNRESET
);
988 usbhsg_unlock(lock
, &flags
);
989 /******************** spin unlock ******************/
994 static int __usbhsg_ep_set_halt_wedge(struct usb_ep
*ep
, int halt
, int wedge
)
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
);
1001 unsigned long flags
;
1006 * CAUTION [*queue handler*]
1007 * CAUTION [*endpoint queue*]
1008 * CAUTION [*request complete*]
1011 /******************** spin lock ********************/
1012 lock
= usbhsg_trylock(gpriv
, &flags
);
1013 if (!usbhsg_queue_get(uep
)) {
1015 dev_dbg(dev
, "set halt %d (pipe %d)\n",
1016 halt
, usbhs_pipe_number(pipe
));
1019 usbhs_fifo_stall(pipe
);
1021 usbhs_fifo_disable(pipe
);
1024 usbhsg_status_set(gpriv
, USBHSG_STATUS_WEDGE
);
1026 usbhsg_status_clr(gpriv
, USBHSG_STATUS_WEDGE
);
1031 usbhsg_unlock(lock
, &flags
);
1032 /******************** spin unlock ******************/
1037 static int usbhsg_ep_set_halt(struct usb_ep
*ep
, int value
)
1039 return __usbhsg_ep_set_halt_wedge(ep
, value
, 0);
1042 static int usbhsg_ep_set_wedge(struct usb_ep
*ep
)
1044 return __usbhsg_ep_set_halt_wedge(ep
, 1, 1);
1047 static struct usb_ep_ops usbhsg_ep_ops
= {
1048 .enable
= usbhsg_ep_enable
,
1049 .disable
= usbhsg_ep_disable
,
1051 .alloc_request
= usbhsg_ep_alloc_request
,
1052 .free_request
= usbhsg_ep_free_request
,
1054 .queue
= usbhsg_ep_queue
,
1055 .dequeue
= usbhsg_ep_dequeue
,
1057 .set_halt
= usbhsg_ep_set_halt
,
1058 .set_wedge
= usbhsg_ep_set_wedge
,
1062 * usb module start/end
1064 static int usbhsg_try_start(struct usbhs_priv
*priv
, u32 status
)
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
);
1071 unsigned long flags
;
1073 /******************** spin lock ********************/
1074 lock
= usbhsg_trylock(gpriv
, &flags
);
1077 * enable interrupt and systems if ready
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
;
1084 dev_dbg(dev
, "start gadget\n");
1087 * pipe initialize and enable DCP
1089 usbhs_pipe_init(priv
);
1090 usbhsg_uep_init(gpriv
);
1091 usbhsg_dcp_enable(dcp
);
1094 * system config enble
1099 usbhs_sys_hispeed_ctrl(priv
, 1);
1100 usbhs_sys_function_ctrl(priv
, 1);
1101 usbhs_sys_usb_ctrl(priv
, 1);
1104 * enable irq callback
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
);
1114 usbhsg_try_start_unlock
:
1115 usbhsg_unlock(lock
, &flags
);
1116 /******************** spin unlock ********************/
1121 static int usbhsg_try_stop(struct usbhs_priv
*priv
, u32 status
)
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
);
1128 unsigned long flags
;
1130 /******************** spin lock ********************/
1131 lock
= usbhsg_trylock(gpriv
, &flags
);
1134 * disable interrupt and systems if 1st try
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
;
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
);
1150 usbhsg_dcp_disable(dcp
);
1152 gpriv
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1155 usbhs_sys_hispeed_ctrl(priv
, 0);
1156 usbhs_sys_function_ctrl(priv
, 0);
1157 usbhs_sys_usb_ctrl(priv
, 0);
1159 usbhsg_unlock(lock
, &flags
);
1160 /******************** spin unlock ********************/
1162 if (gpriv
->driver
&&
1163 gpriv
->driver
->disconnect
)
1164 gpriv
->driver
->disconnect(&gpriv
->gadget
);
1166 dev_dbg(dev
, "stop gadget\n");
1170 usbhsg_try_stop_unlock
:
1171 usbhsg_unlock(lock
, &flags
);
1178 * linux usb function
1181 struct usbhsg_gpriv
*the_controller
;
1182 int usb_gadget_probe_driver(struct usb_gadget_driver
*driver
,
1183 int (*bind
)(struct usb_gadget
*))
1185 struct usbhsg_gpriv
*gpriv
= the_controller
;
1186 struct usbhs_priv
*priv
;
1193 driver
->speed
!= USB_SPEED_HIGH
)
1200 dev
= usbhsg_gpriv_to_dev(gpriv
);
1201 priv
= usbhsg_gpriv_to_priv(gpriv
);
1203 /* first hook up the driver ... */
1204 gpriv
->driver
= driver
;
1205 gpriv
->gadget
.dev
.driver
= &driver
->driver
;
1207 ret
= device_add(&gpriv
->gadget
.dev
);
1209 dev_err(dev
, "device_add error %d\n", ret
);
1213 ret
= bind(&gpriv
->gadget
);
1215 dev_err(dev
, "bind to driver %s error %d\n",
1216 driver
->driver
.name
, ret
);
1220 dev_dbg(dev
, "bind %s\n", driver
->driver
.name
);
1222 return usbhsg_try_start(priv
, USBHSG_STATUS_REGISTERD
);
1225 device_del(&gpriv
->gadget
.dev
);
1227 gpriv
->driver
= NULL
;
1228 gpriv
->gadget
.dev
.driver
= NULL
;
1232 EXPORT_SYMBOL(usb_gadget_probe_driver
);
1234 int usb_gadget_unregister_driver(struct usb_gadget_driver
*driver
)
1236 struct usbhsg_gpriv
*gpriv
= the_controller
;
1237 struct usbhs_priv
*priv
;
1238 struct device
*dev
= usbhsg_gpriv_to_dev(gpriv
);
1245 driver
!= gpriv
->driver
)
1248 dev
= usbhsg_gpriv_to_dev(gpriv
);
1249 priv
= usbhsg_gpriv_to_priv(gpriv
);
1251 usbhsg_try_stop(priv
, USBHSG_STATUS_REGISTERD
);
1252 device_del(&gpriv
->gadget
.dev
);
1253 gpriv
->driver
= NULL
;
1255 if (driver
->disconnect
)
1256 driver
->disconnect(&gpriv
->gadget
);
1258 driver
->unbind(&gpriv
->gadget
);
1259 dev_dbg(dev
, "unbind %s\n", driver
->driver
.name
);
1263 EXPORT_SYMBOL(usb_gadget_unregister_driver
);
1268 static int usbhsg_get_frame(struct usb_gadget
*gadget
)
1270 struct usbhsg_gpriv
*gpriv
= usbhsg_gadget_to_gpriv(gadget
);
1271 struct usbhs_priv
*priv
= usbhsg_gpriv_to_priv(gpriv
);
1273 return usbhs_frame_get_num(priv
);
1276 static struct usb_gadget_ops usbhsg_gadget_ops
= {
1277 .get_frame
= usbhsg_get_frame
,
1280 static int usbhsg_start(struct usbhs_priv
*priv
)
1282 return usbhsg_try_start(priv
, USBHSG_STATUS_STARTED
);
1285 static int usbhsg_stop(struct usbhs_priv
*priv
)
1287 return usbhsg_try_stop(priv
, USBHSG_STATUS_STARTED
);
1290 int __devinit
usbhs_mod_gadget_probe(struct usbhs_priv
*priv
)
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
);
1298 gpriv
= kzalloc(sizeof(struct usbhsg_gpriv
), GFP_KERNEL
);
1300 dev_err(dev
, "Could not allocate gadget priv\n");
1304 uep
= kzalloc(sizeof(struct usbhsg_uep
) * pipe_size
, GFP_KERNEL
);
1306 dev_err(dev
, "Could not allocate ep\n");
1307 goto usbhs_mod_gadget_probe_err_gpriv
;
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"
1321 usbhs_mod_register(priv
, &gpriv
->mod
, USBHS_GADGET
);
1324 gpriv
->mod
.name
= "gadget";
1325 gpriv
->mod
.start
= usbhsg_start
;
1326 gpriv
->mod
.stop
= usbhsg_stop
;
1328 gpriv
->uep_size
= pipe_size
;
1329 usbhsg_status_init(gpriv
);
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;
1341 INIT_LIST_HEAD(&gpriv
->gadget
.ep_list
);
1346 usbhsg_for_each_uep_with_dcp(uep
, gpriv
, i
) {
1348 snprintf(uep
->ep_name
, EP_NAME_SIZE
, "ep%d", i
);
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
);
1356 if (usbhsg_is_dcp(uep
)) {
1357 gpriv
->gadget
.ep0
= &uep
->ep
;
1358 uep
->ep
.maxpacket
= 64;
1360 /* init normal pipe */
1362 uep
->ep
.maxpacket
= 512;
1363 list_add_tail(&uep
->ep
.ep_list
, &gpriv
->gadget
.ep_list
);
1367 the_controller
= gpriv
;
1369 dev_info(dev
, "gadget probed\n");
1373 usbhs_mod_gadget_probe_err_gpriv
:
1379 void __devexit
usbhs_mod_gadget_remove(struct usbhs_priv
*priv
)
1381 struct usbhsg_gpriv
*gpriv
= usbhsg_priv_to_gpriv(priv
);