2 * udc.c - ChipIdea UDC driver
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/delay.h>
14 #include <linux/device.h>
15 #include <linux/dmapool.h>
16 #include <linux/err.h>
17 #include <linux/irqreturn.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/usb/ch9.h>
22 #include <linux/usb/gadget.h>
23 #include <linux/usb/otg.h>
24 #include <linux/usb/chipidea.h>
31 /* control endpoint description */
32 static const struct usb_endpoint_descriptor
33 ctrl_endpt_out_desc
= {
34 .bLength
= USB_DT_ENDPOINT_SIZE
,
35 .bDescriptorType
= USB_DT_ENDPOINT
,
37 .bEndpointAddress
= USB_DIR_OUT
,
38 .bmAttributes
= USB_ENDPOINT_XFER_CONTROL
,
39 .wMaxPacketSize
= cpu_to_le16(CTRL_PAYLOAD_MAX
),
42 static const struct usb_endpoint_descriptor
43 ctrl_endpt_in_desc
= {
44 .bLength
= USB_DT_ENDPOINT_SIZE
,
45 .bDescriptorType
= USB_DT_ENDPOINT
,
47 .bEndpointAddress
= USB_DIR_IN
,
48 .bmAttributes
= USB_ENDPOINT_XFER_CONTROL
,
49 .wMaxPacketSize
= cpu_to_le16(CTRL_PAYLOAD_MAX
),
53 * hw_ep_bit: calculates the bit number
54 * @num: endpoint number
55 * @dir: endpoint direction
57 * This function returns bit number
59 static inline int hw_ep_bit(int num
, int dir
)
61 return num
+ (dir
? 16 : 0);
64 static inline int ep_to_bit(struct ci13xxx
*ci
, int n
)
66 int fill
= 16 - ci
->hw_ep_max
/ 2;
68 if (n
>= ci
->hw_ep_max
/ 2)
75 * hw_device_state: enables/disables interrupts (execute without interruption)
76 * @dma: 0 => disable, !0 => enable and set dma engine
78 * This function returns an error code
80 static int hw_device_state(struct ci13xxx
*ci
, u32 dma
)
83 hw_write(ci
, OP_ENDPTLISTADDR
, ~0, dma
);
84 /* interrupt, error, port change, reset, sleep/suspend */
85 hw_write(ci
, OP_USBINTR
, ~0,
86 USBi_UI
|USBi_UEI
|USBi_PCI
|USBi_URI
|USBi_SLI
);
88 hw_write(ci
, OP_USBINTR
, ~0, 0);
94 * hw_ep_flush: flush endpoint fifo (execute without interruption)
95 * @num: endpoint number
96 * @dir: endpoint direction
98 * This function returns an error code
100 static int hw_ep_flush(struct ci13xxx
*ci
, int num
, int dir
)
102 int n
= hw_ep_bit(num
, dir
);
105 /* flush any pending transfer */
106 hw_write(ci
, OP_ENDPTFLUSH
, BIT(n
), BIT(n
));
107 while (hw_read(ci
, OP_ENDPTFLUSH
, BIT(n
)))
109 } while (hw_read(ci
, OP_ENDPTSTAT
, BIT(n
)));
115 * hw_ep_disable: disables endpoint (execute without interruption)
116 * @num: endpoint number
117 * @dir: endpoint direction
119 * This function returns an error code
121 static int hw_ep_disable(struct ci13xxx
*ci
, int num
, int dir
)
123 hw_ep_flush(ci
, num
, dir
);
124 hw_write(ci
, OP_ENDPTCTRL
+ num
,
125 dir
? ENDPTCTRL_TXE
: ENDPTCTRL_RXE
, 0);
130 * hw_ep_enable: enables endpoint (execute without interruption)
131 * @num: endpoint number
132 * @dir: endpoint direction
133 * @type: endpoint type
135 * This function returns an error code
137 static int hw_ep_enable(struct ci13xxx
*ci
, int num
, int dir
, int type
)
142 mask
= ENDPTCTRL_TXT
; /* type */
143 data
= type
<< ffs_nr(mask
);
145 mask
|= ENDPTCTRL_TXS
; /* unstall */
146 mask
|= ENDPTCTRL_TXR
; /* reset data toggle */
147 data
|= ENDPTCTRL_TXR
;
148 mask
|= ENDPTCTRL_TXE
; /* enable */
149 data
|= ENDPTCTRL_TXE
;
151 mask
= ENDPTCTRL_RXT
; /* type */
152 data
= type
<< ffs_nr(mask
);
154 mask
|= ENDPTCTRL_RXS
; /* unstall */
155 mask
|= ENDPTCTRL_RXR
; /* reset data toggle */
156 data
|= ENDPTCTRL_RXR
;
157 mask
|= ENDPTCTRL_RXE
; /* enable */
158 data
|= ENDPTCTRL_RXE
;
160 hw_write(ci
, OP_ENDPTCTRL
+ num
, mask
, data
);
165 * hw_ep_get_halt: return endpoint halt status
166 * @num: endpoint number
167 * @dir: endpoint direction
169 * This function returns 1 if endpoint halted
171 static int hw_ep_get_halt(struct ci13xxx
*ci
, int num
, int dir
)
173 u32 mask
= dir
? ENDPTCTRL_TXS
: ENDPTCTRL_RXS
;
175 return hw_read(ci
, OP_ENDPTCTRL
+ num
, mask
) ? 1 : 0;
179 * hw_test_and_clear_setup_status: test & clear setup status (execute without
181 * @n: endpoint number
183 * This function returns setup status
185 static int hw_test_and_clear_setup_status(struct ci13xxx
*ci
, int n
)
187 n
= ep_to_bit(ci
, n
);
188 return hw_test_and_clear(ci
, OP_ENDPTSETUPSTAT
, BIT(n
));
192 * hw_ep_prime: primes endpoint (execute without interruption)
193 * @num: endpoint number
194 * @dir: endpoint direction
195 * @is_ctrl: true if control endpoint
197 * This function returns an error code
199 static int hw_ep_prime(struct ci13xxx
*ci
, int num
, int dir
, int is_ctrl
)
201 int n
= hw_ep_bit(num
, dir
);
203 if (is_ctrl
&& dir
== RX
&& hw_read(ci
, OP_ENDPTSETUPSTAT
, BIT(num
)))
206 hw_write(ci
, OP_ENDPTPRIME
, BIT(n
), BIT(n
));
208 while (hw_read(ci
, OP_ENDPTPRIME
, BIT(n
)))
210 if (is_ctrl
&& dir
== RX
&& hw_read(ci
, OP_ENDPTSETUPSTAT
, BIT(num
)))
213 /* status shoult be tested according with manual but it doesn't work */
218 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
219 * without interruption)
220 * @num: endpoint number
221 * @dir: endpoint direction
222 * @value: true => stall, false => unstall
224 * This function returns an error code
226 static int hw_ep_set_halt(struct ci13xxx
*ci
, int num
, int dir
, int value
)
228 if (value
!= 0 && value
!= 1)
232 enum ci13xxx_regs reg
= OP_ENDPTCTRL
+ num
;
233 u32 mask_xs
= dir
? ENDPTCTRL_TXS
: ENDPTCTRL_RXS
;
234 u32 mask_xr
= dir
? ENDPTCTRL_TXR
: ENDPTCTRL_RXR
;
236 /* data toggle - reserved for EP0 but it's in ESS */
237 hw_write(ci
, reg
, mask_xs
|mask_xr
,
238 value
? mask_xs
: mask_xr
);
239 } while (value
!= hw_ep_get_halt(ci
, num
, dir
));
245 * hw_is_port_high_speed: test if port is high speed
247 * This function returns true if high speed port
249 static int hw_port_is_high_speed(struct ci13xxx
*ci
)
251 return ci
->hw_bank
.lpm
? hw_read(ci
, OP_DEVLC
, DEVLC_PSPD
) :
252 hw_read(ci
, OP_PORTSC
, PORTSC_HSP
);
256 * hw_read_intr_enable: returns interrupt enable register
258 * This function returns register data
260 static u32
hw_read_intr_enable(struct ci13xxx
*ci
)
262 return hw_read(ci
, OP_USBINTR
, ~0);
266 * hw_read_intr_status: returns interrupt status register
268 * This function returns register data
270 static u32
hw_read_intr_status(struct ci13xxx
*ci
)
272 return hw_read(ci
, OP_USBSTS
, ~0);
276 * hw_test_and_clear_complete: test & clear complete status (execute without
278 * @n: endpoint number
280 * This function returns complete status
282 static int hw_test_and_clear_complete(struct ci13xxx
*ci
, int n
)
284 n
= ep_to_bit(ci
, n
);
285 return hw_test_and_clear(ci
, OP_ENDPTCOMPLETE
, BIT(n
));
289 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
290 * without interruption)
292 * This function returns active interrutps
294 static u32
hw_test_and_clear_intr_active(struct ci13xxx
*ci
)
296 u32 reg
= hw_read_intr_status(ci
) & hw_read_intr_enable(ci
);
298 hw_write(ci
, OP_USBSTS
, ~0, reg
);
303 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
306 * This function returns guard value
308 static int hw_test_and_clear_setup_guard(struct ci13xxx
*ci
)
310 return hw_test_and_write(ci
, OP_USBCMD
, USBCMD_SUTW
, 0);
314 * hw_test_and_set_setup_guard: test & set setup guard (execute without
317 * This function returns guard value
319 static int hw_test_and_set_setup_guard(struct ci13xxx
*ci
)
321 return hw_test_and_write(ci
, OP_USBCMD
, USBCMD_SUTW
, USBCMD_SUTW
);
325 * hw_usb_set_address: configures USB address (execute without interruption)
326 * @value: new USB address
328 * This function explicitly sets the address, without the "USBADRA" (advance)
329 * feature, which is not supported by older versions of the controller.
331 static void hw_usb_set_address(struct ci13xxx
*ci
, u8 value
)
333 hw_write(ci
, OP_DEVICEADDR
, DEVICEADDR_USBADR
,
334 value
<< ffs_nr(DEVICEADDR_USBADR
));
338 * hw_usb_reset: restart device after a bus reset (execute without
341 * This function returns an error code
343 static int hw_usb_reset(struct ci13xxx
*ci
)
345 hw_usb_set_address(ci
, 0);
347 /* ESS flushes only at end?!? */
348 hw_write(ci
, OP_ENDPTFLUSH
, ~0, ~0);
350 /* clear setup token semaphores */
351 hw_write(ci
, OP_ENDPTSETUPSTAT
, 0, 0);
353 /* clear complete status */
354 hw_write(ci
, OP_ENDPTCOMPLETE
, 0, 0);
356 /* wait until all bits cleared */
357 while (hw_read(ci
, OP_ENDPTPRIME
, ~0))
358 udelay(10); /* not RTOS friendly */
360 /* reset all endpoints ? */
362 /* reset internal status and wait for further instructions
363 no need to verify the port reset status (ESS does it) */
368 /******************************************************************************
370 *****************************************************************************/
372 * _usb_addr: calculates endpoint address from direction & number
375 static inline u8
_usb_addr(struct ci13xxx_ep
*ep
)
377 return ((ep
->dir
== TX
) ? USB_ENDPOINT_DIR_MASK
: 0) | ep
->num
;
381 * _hardware_queue: configures a request at hardware level
385 * This function returns an error code
387 static int _hardware_enqueue(struct ci13xxx_ep
*mEp
, struct ci13xxx_req
*mReq
)
389 struct ci13xxx
*ci
= mEp
->ci
;
392 unsigned length
= mReq
->req
.length
;
394 /* don't queue twice */
395 if (mReq
->req
.status
== -EALREADY
)
398 mReq
->req
.status
= -EALREADY
;
400 if (mReq
->req
.zero
&& length
&& (length
% mEp
->ep
.maxpacket
== 0)) {
401 mReq
->zptr
= dma_pool_alloc(mEp
->td_pool
, GFP_ATOMIC
,
403 if (mReq
->zptr
== NULL
)
406 memset(mReq
->zptr
, 0, sizeof(*mReq
->zptr
));
407 mReq
->zptr
->next
= TD_TERMINATE
;
408 mReq
->zptr
->token
= TD_STATUS_ACTIVE
;
409 if (!mReq
->req
.no_interrupt
)
410 mReq
->zptr
->token
|= TD_IOC
;
412 ret
= usb_gadget_map_request(&ci
->gadget
, &mReq
->req
, mEp
->dir
);
418 * TODO - handle requests which spawns into several TDs
420 memset(mReq
->ptr
, 0, sizeof(*mReq
->ptr
));
421 mReq
->ptr
->token
= length
<< ffs_nr(TD_TOTAL_BYTES
);
422 mReq
->ptr
->token
&= TD_TOTAL_BYTES
;
423 mReq
->ptr
->token
|= TD_STATUS_ACTIVE
;
425 mReq
->ptr
->next
= mReq
->zdma
;
427 mReq
->ptr
->next
= TD_TERMINATE
;
428 if (!mReq
->req
.no_interrupt
)
429 mReq
->ptr
->token
|= TD_IOC
;
431 mReq
->ptr
->page
[0] = mReq
->req
.dma
;
432 for (i
= 1; i
< 5; i
++)
434 (mReq
->req
.dma
+ i
* CI13XXX_PAGE_SIZE
) & ~TD_RESERVED_MASK
;
436 if (!list_empty(&mEp
->qh
.queue
)) {
437 struct ci13xxx_req
*mReqPrev
;
438 int n
= hw_ep_bit(mEp
->num
, mEp
->dir
);
441 mReqPrev
= list_entry(mEp
->qh
.queue
.prev
,
442 struct ci13xxx_req
, queue
);
444 mReqPrev
->zptr
->next
= mReq
->dma
& TD_ADDR_MASK
;
446 mReqPrev
->ptr
->next
= mReq
->dma
& TD_ADDR_MASK
;
448 if (hw_read(ci
, OP_ENDPTPRIME
, BIT(n
)))
451 hw_write(ci
, OP_USBCMD
, USBCMD_ATDTW
, USBCMD_ATDTW
);
452 tmp_stat
= hw_read(ci
, OP_ENDPTSTAT
, BIT(n
));
453 } while (!hw_read(ci
, OP_USBCMD
, USBCMD_ATDTW
));
454 hw_write(ci
, OP_USBCMD
, USBCMD_ATDTW
, 0);
459 /* QH configuration */
460 mEp
->qh
.ptr
->td
.next
= mReq
->dma
; /* TERMINATE = 0 */
461 mEp
->qh
.ptr
->td
.token
&= ~TD_STATUS
; /* clear status */
462 mEp
->qh
.ptr
->cap
|= QH_ZLT
;
464 wmb(); /* synchronize before ep prime */
466 ret
= hw_ep_prime(ci
, mEp
->num
, mEp
->dir
,
467 mEp
->type
== USB_ENDPOINT_XFER_CONTROL
);
473 * _hardware_dequeue: handles a request at hardware level
477 * This function returns an error code
479 static int _hardware_dequeue(struct ci13xxx_ep
*mEp
, struct ci13xxx_req
*mReq
)
481 if (mReq
->req
.status
!= -EALREADY
)
484 if ((TD_STATUS_ACTIVE
& mReq
->ptr
->token
) != 0)
488 if ((TD_STATUS_ACTIVE
& mReq
->zptr
->token
) != 0)
490 dma_pool_free(mEp
->td_pool
, mReq
->zptr
, mReq
->zdma
);
494 mReq
->req
.status
= 0;
496 usb_gadget_unmap_request(&mEp
->ci
->gadget
, &mReq
->req
, mEp
->dir
);
498 mReq
->req
.status
= mReq
->ptr
->token
& TD_STATUS
;
499 if ((TD_STATUS_HALTED
& mReq
->req
.status
) != 0)
500 mReq
->req
.status
= -1;
501 else if ((TD_STATUS_DT_ERR
& mReq
->req
.status
) != 0)
502 mReq
->req
.status
= -1;
503 else if ((TD_STATUS_TR_ERR
& mReq
->req
.status
) != 0)
504 mReq
->req
.status
= -1;
506 mReq
->req
.actual
= mReq
->ptr
->token
& TD_TOTAL_BYTES
;
507 mReq
->req
.actual
>>= ffs_nr(TD_TOTAL_BYTES
);
508 mReq
->req
.actual
= mReq
->req
.length
- mReq
->req
.actual
;
509 mReq
->req
.actual
= mReq
->req
.status
? 0 : mReq
->req
.actual
;
511 return mReq
->req
.actual
;
515 * _ep_nuke: dequeues all endpoint requests
518 * This function returns an error code
519 * Caller must hold lock
521 static int _ep_nuke(struct ci13xxx_ep
*mEp
)
522 __releases(mEp
->lock
)
523 __acquires(mEp
->lock
)
528 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
530 while (!list_empty(&mEp
->qh
.queue
)) {
532 /* pop oldest request */
533 struct ci13xxx_req
*mReq
= \
534 list_entry(mEp
->qh
.queue
.next
,
535 struct ci13xxx_req
, queue
);
536 list_del_init(&mReq
->queue
);
537 mReq
->req
.status
= -ESHUTDOWN
;
539 if (mReq
->req
.complete
!= NULL
) {
540 spin_unlock(mEp
->lock
);
541 mReq
->req
.complete(&mEp
->ep
, &mReq
->req
);
542 spin_lock(mEp
->lock
);
549 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
552 * This function returns an error code
554 static int _gadget_stop_activity(struct usb_gadget
*gadget
)
557 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
560 spin_lock_irqsave(&ci
->lock
, flags
);
561 ci
->gadget
.speed
= USB_SPEED_UNKNOWN
;
562 ci
->remote_wakeup
= 0;
564 spin_unlock_irqrestore(&ci
->lock
, flags
);
566 /* flush all endpoints */
567 gadget_for_each_ep(ep
, gadget
) {
568 usb_ep_fifo_flush(ep
);
570 usb_ep_fifo_flush(&ci
->ep0out
->ep
);
571 usb_ep_fifo_flush(&ci
->ep0in
->ep
);
574 ci
->driver
->disconnect(gadget
);
576 /* make sure to disable all endpoints */
577 gadget_for_each_ep(ep
, gadget
) {
581 if (ci
->status
!= NULL
) {
582 usb_ep_free_request(&ci
->ep0in
->ep
, ci
->status
);
589 /******************************************************************************
591 *****************************************************************************/
593 * isr_reset_handler: USB reset interrupt handler
596 * This function resets USB engine after a bus reset occurred
598 static void isr_reset_handler(struct ci13xxx
*ci
)
604 spin_unlock(&ci
->lock
);
605 retval
= _gadget_stop_activity(&ci
->gadget
);
609 retval
= hw_usb_reset(ci
);
613 ci
->status
= usb_ep_alloc_request(&ci
->ep0in
->ep
, GFP_ATOMIC
);
614 if (ci
->status
== NULL
)
618 spin_lock(&ci
->lock
);
621 dev_err(ci
->dev
, "error: %i\n", retval
);
625 * isr_get_status_complete: get_status request complete function
627 * @req: request handled
629 * Caller must release lock
631 static void isr_get_status_complete(struct usb_ep
*ep
, struct usb_request
*req
)
633 if (ep
== NULL
|| req
== NULL
)
637 usb_ep_free_request(ep
, req
);
641 * isr_get_status_response: get_status request response
643 * @setup: setup request packet
645 * This function returns an error code
647 static int isr_get_status_response(struct ci13xxx
*ci
,
648 struct usb_ctrlrequest
*setup
)
649 __releases(mEp
->lock
)
650 __acquires(mEp
->lock
)
652 struct ci13xxx_ep
*mEp
= ci
->ep0in
;
653 struct usb_request
*req
= NULL
;
654 gfp_t gfp_flags
= GFP_ATOMIC
;
655 int dir
, num
, retval
;
657 if (mEp
== NULL
|| setup
== NULL
)
660 spin_unlock(mEp
->lock
);
661 req
= usb_ep_alloc_request(&mEp
->ep
, gfp_flags
);
662 spin_lock(mEp
->lock
);
666 req
->complete
= isr_get_status_complete
;
668 req
->buf
= kzalloc(req
->length
, gfp_flags
);
669 if (req
->buf
== NULL
) {
674 if ((setup
->bRequestType
& USB_RECIP_MASK
) == USB_RECIP_DEVICE
) {
675 /* Assume that device is bus powered for now. */
676 *(u16
*)req
->buf
= ci
->remote_wakeup
<< 1;
678 } else if ((setup
->bRequestType
& USB_RECIP_MASK
) \
679 == USB_RECIP_ENDPOINT
) {
680 dir
= (le16_to_cpu(setup
->wIndex
) & USB_ENDPOINT_DIR_MASK
) ?
682 num
= le16_to_cpu(setup
->wIndex
) & USB_ENDPOINT_NUMBER_MASK
;
683 *(u16
*)req
->buf
= hw_ep_get_halt(ci
, num
, dir
);
685 /* else do nothing; reserved for future use */
687 spin_unlock(mEp
->lock
);
688 retval
= usb_ep_queue(&mEp
->ep
, req
, gfp_flags
);
689 spin_lock(mEp
->lock
);
698 spin_unlock(mEp
->lock
);
699 usb_ep_free_request(&mEp
->ep
, req
);
700 spin_lock(mEp
->lock
);
705 * isr_setup_status_complete: setup_status request complete function
707 * @req: request handled
709 * Caller must release lock. Put the port in test mode if test mode
710 * feature is selected.
713 isr_setup_status_complete(struct usb_ep
*ep
, struct usb_request
*req
)
715 struct ci13xxx
*ci
= req
->context
;
719 hw_usb_set_address(ci
, ci
->address
);
723 spin_lock_irqsave(&ci
->lock
, flags
);
725 hw_port_test_set(ci
, ci
->test_mode
);
726 spin_unlock_irqrestore(&ci
->lock
, flags
);
730 * isr_setup_status_phase: queues the status phase of a setup transation
733 * This function returns an error code
735 static int isr_setup_status_phase(struct ci13xxx
*ci
)
736 __releases(mEp
->lock
)
737 __acquires(mEp
->lock
)
740 struct ci13xxx_ep
*mEp
;
742 mEp
= (ci
->ep0_dir
== TX
) ? ci
->ep0out
: ci
->ep0in
;
743 ci
->status
->context
= ci
;
744 ci
->status
->complete
= isr_setup_status_complete
;
746 spin_unlock(mEp
->lock
);
747 retval
= usb_ep_queue(&mEp
->ep
, ci
->status
, GFP_ATOMIC
);
748 spin_lock(mEp
->lock
);
754 * isr_tr_complete_low: transaction complete low level handler
757 * This function returns an error code
758 * Caller must hold lock
760 static int isr_tr_complete_low(struct ci13xxx_ep
*mEp
)
761 __releases(mEp
->lock
)
762 __acquires(mEp
->lock
)
764 struct ci13xxx_req
*mReq
, *mReqTemp
;
765 struct ci13xxx_ep
*mEpTemp
= mEp
;
768 list_for_each_entry_safe(mReq
, mReqTemp
, &mEp
->qh
.queue
,
770 retval
= _hardware_dequeue(mEp
, mReq
);
773 list_del_init(&mReq
->queue
);
774 if (mReq
->req
.complete
!= NULL
) {
775 spin_unlock(mEp
->lock
);
776 if ((mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) &&
778 mEpTemp
= mEp
->ci
->ep0in
;
779 mReq
->req
.complete(&mEpTemp
->ep
, &mReq
->req
);
780 spin_lock(mEp
->lock
);
784 if (retval
== -EBUSY
)
791 * isr_tr_complete_handler: transaction complete interrupt handler
792 * @ci: UDC descriptor
794 * This function handles traffic events
796 static void isr_tr_complete_handler(struct ci13xxx
*ci
)
803 for (i
= 0; i
< ci
->hw_ep_max
; i
++) {
804 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[i
];
805 int type
, num
, dir
, err
= -EINVAL
;
806 struct usb_ctrlrequest req
;
808 if (mEp
->ep
.desc
== NULL
)
809 continue; /* not configured */
811 if (hw_test_and_clear_complete(ci
, i
)) {
812 err
= isr_tr_complete_low(mEp
);
813 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) {
814 if (err
> 0) /* needs status phase */
815 err
= isr_setup_status_phase(ci
);
817 spin_unlock(&ci
->lock
);
818 if (usb_ep_set_halt(&mEp
->ep
))
820 "error: ep_set_halt\n");
821 spin_lock(&ci
->lock
);
826 if (mEp
->type
!= USB_ENDPOINT_XFER_CONTROL
||
827 !hw_test_and_clear_setup_status(ci
, i
))
831 dev_warn(ci
->dev
, "ctrl traffic at endpoint %d\n", i
);
836 * Flush data and handshake transactions of previous
839 _ep_nuke(ci
->ep0out
);
842 /* read_setup_packet */
844 hw_test_and_set_setup_guard(ci
);
845 memcpy(&req
, &mEp
->qh
.ptr
->setup
, sizeof(req
));
846 } while (!hw_test_and_clear_setup_guard(ci
));
848 type
= req
.bRequestType
;
850 ci
->ep0_dir
= (type
& USB_DIR_IN
) ? TX
: RX
;
852 switch (req
.bRequest
) {
853 case USB_REQ_CLEAR_FEATURE
:
854 if (type
== (USB_DIR_OUT
|USB_RECIP_ENDPOINT
) &&
855 le16_to_cpu(req
.wValue
) ==
857 if (req
.wLength
!= 0)
859 num
= le16_to_cpu(req
.wIndex
);
860 dir
= num
& USB_ENDPOINT_DIR_MASK
;
861 num
&= USB_ENDPOINT_NUMBER_MASK
;
863 num
+= ci
->hw_ep_max
/2;
864 if (!ci
->ci13xxx_ep
[num
].wedge
) {
865 spin_unlock(&ci
->lock
);
866 err
= usb_ep_clear_halt(
867 &ci
->ci13xxx_ep
[num
].ep
);
868 spin_lock(&ci
->lock
);
872 err
= isr_setup_status_phase(ci
);
873 } else if (type
== (USB_DIR_OUT
|USB_RECIP_DEVICE
) &&
874 le16_to_cpu(req
.wValue
) ==
875 USB_DEVICE_REMOTE_WAKEUP
) {
876 if (req
.wLength
!= 0)
878 ci
->remote_wakeup
= 0;
879 err
= isr_setup_status_phase(ci
);
884 case USB_REQ_GET_STATUS
:
885 if (type
!= (USB_DIR_IN
|USB_RECIP_DEVICE
) &&
886 type
!= (USB_DIR_IN
|USB_RECIP_ENDPOINT
) &&
887 type
!= (USB_DIR_IN
|USB_RECIP_INTERFACE
))
889 if (le16_to_cpu(req
.wLength
) != 2 ||
890 le16_to_cpu(req
.wValue
) != 0)
892 err
= isr_get_status_response(ci
, &req
);
894 case USB_REQ_SET_ADDRESS
:
895 if (type
!= (USB_DIR_OUT
|USB_RECIP_DEVICE
))
897 if (le16_to_cpu(req
.wLength
) != 0 ||
898 le16_to_cpu(req
.wIndex
) != 0)
900 ci
->address
= (u8
)le16_to_cpu(req
.wValue
);
902 err
= isr_setup_status_phase(ci
);
904 case USB_REQ_SET_FEATURE
:
905 if (type
== (USB_DIR_OUT
|USB_RECIP_ENDPOINT
) &&
906 le16_to_cpu(req
.wValue
) ==
908 if (req
.wLength
!= 0)
910 num
= le16_to_cpu(req
.wIndex
);
911 dir
= num
& USB_ENDPOINT_DIR_MASK
;
912 num
&= USB_ENDPOINT_NUMBER_MASK
;
914 num
+= ci
->hw_ep_max
/2;
916 spin_unlock(&ci
->lock
);
917 err
= usb_ep_set_halt(&ci
->ci13xxx_ep
[num
].ep
);
918 spin_lock(&ci
->lock
);
920 isr_setup_status_phase(ci
);
921 } else if (type
== (USB_DIR_OUT
|USB_RECIP_DEVICE
)) {
922 if (req
.wLength
!= 0)
924 switch (le16_to_cpu(req
.wValue
)) {
925 case USB_DEVICE_REMOTE_WAKEUP
:
926 ci
->remote_wakeup
= 1;
927 err
= isr_setup_status_phase(ci
);
929 case USB_DEVICE_TEST_MODE
:
930 tmode
= le16_to_cpu(req
.wIndex
) >> 8;
937 ci
->test_mode
= tmode
;
938 err
= isr_setup_status_phase(
953 if (req
.wLength
== 0) /* no data phase */
956 spin_unlock(&ci
->lock
);
957 err
= ci
->driver
->setup(&ci
->gadget
, &req
);
958 spin_lock(&ci
->lock
);
963 spin_unlock(&ci
->lock
);
964 if (usb_ep_set_halt(&mEp
->ep
))
965 dev_err(ci
->dev
, "error: ep_set_halt\n");
966 spin_lock(&ci
->lock
);
971 /******************************************************************************
973 *****************************************************************************/
975 * ep_enable: configure endpoint, making it usable
977 * Check usb_ep_enable() at "usb_gadget.h" for details
979 static int ep_enable(struct usb_ep
*ep
,
980 const struct usb_endpoint_descriptor
*desc
)
982 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
986 if (ep
== NULL
|| desc
== NULL
)
989 spin_lock_irqsave(mEp
->lock
, flags
);
991 /* only internal SW should enable ctrl endpts */
995 if (!list_empty(&mEp
->qh
.queue
))
996 dev_warn(mEp
->ci
->dev
, "enabling a non-empty endpoint!\n");
998 mEp
->dir
= usb_endpoint_dir_in(desc
) ? TX
: RX
;
999 mEp
->num
= usb_endpoint_num(desc
);
1000 mEp
->type
= usb_endpoint_type(desc
);
1002 mEp
->ep
.maxpacket
= usb_endpoint_maxp(desc
);
1004 mEp
->qh
.ptr
->cap
= 0;
1006 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1007 mEp
->qh
.ptr
->cap
|= QH_IOS
;
1008 else if (mEp
->type
== USB_ENDPOINT_XFER_ISOC
)
1009 mEp
->qh
.ptr
->cap
&= ~QH_MULT
;
1011 mEp
->qh
.ptr
->cap
&= ~QH_ZLT
;
1014 (mEp
->ep
.maxpacket
<< ffs_nr(QH_MAX_PKT
)) & QH_MAX_PKT
;
1015 mEp
->qh
.ptr
->td
.next
|= TD_TERMINATE
; /* needed? */
1018 * Enable endpoints in the HW other than ep0 as ep0
1022 retval
|= hw_ep_enable(mEp
->ci
, mEp
->num
, mEp
->dir
, mEp
->type
);
1024 spin_unlock_irqrestore(mEp
->lock
, flags
);
1029 * ep_disable: endpoint is no longer usable
1031 * Check usb_ep_disable() at "usb_gadget.h" for details
1033 static int ep_disable(struct usb_ep
*ep
)
1035 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1036 int direction
, retval
= 0;
1037 unsigned long flags
;
1041 else if (mEp
->ep
.desc
== NULL
)
1044 spin_lock_irqsave(mEp
->lock
, flags
);
1046 /* only internal SW should disable ctrl endpts */
1048 direction
= mEp
->dir
;
1050 retval
|= _ep_nuke(mEp
);
1051 retval
|= hw_ep_disable(mEp
->ci
, mEp
->num
, mEp
->dir
);
1053 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1054 mEp
->dir
= (mEp
->dir
== TX
) ? RX
: TX
;
1056 } while (mEp
->dir
!= direction
);
1058 mEp
->ep
.desc
= NULL
;
1060 spin_unlock_irqrestore(mEp
->lock
, flags
);
1065 * ep_alloc_request: allocate a request object to use with this endpoint
1067 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
1069 static struct usb_request
*ep_alloc_request(struct usb_ep
*ep
, gfp_t gfp_flags
)
1071 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1072 struct ci13xxx_req
*mReq
= NULL
;
1077 mReq
= kzalloc(sizeof(struct ci13xxx_req
), gfp_flags
);
1079 INIT_LIST_HEAD(&mReq
->queue
);
1081 mReq
->ptr
= dma_pool_alloc(mEp
->td_pool
, gfp_flags
,
1083 if (mReq
->ptr
== NULL
) {
1089 return (mReq
== NULL
) ? NULL
: &mReq
->req
;
1093 * ep_free_request: frees a request object
1095 * Check usb_ep_free_request() at "usb_gadget.h" for details
1097 static void ep_free_request(struct usb_ep
*ep
, struct usb_request
*req
)
1099 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1100 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1101 unsigned long flags
;
1103 if (ep
== NULL
|| req
== NULL
) {
1105 } else if (!list_empty(&mReq
->queue
)) {
1106 dev_err(mEp
->ci
->dev
, "freeing queued request\n");
1110 spin_lock_irqsave(mEp
->lock
, flags
);
1113 dma_pool_free(mEp
->td_pool
, mReq
->ptr
, mReq
->dma
);
1116 spin_unlock_irqrestore(mEp
->lock
, flags
);
1120 * ep_queue: queues (submits) an I/O request to an endpoint
1122 * Check usb_ep_queue()* at usb_gadget.h" for details
1124 static int ep_queue(struct usb_ep
*ep
, struct usb_request
*req
,
1125 gfp_t __maybe_unused gfp_flags
)
1127 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1128 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1129 struct ci13xxx
*ci
= mEp
->ci
;
1131 unsigned long flags
;
1133 if (ep
== NULL
|| req
== NULL
|| mEp
->ep
.desc
== NULL
)
1136 spin_lock_irqsave(mEp
->lock
, flags
);
1138 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) {
1140 mEp
= (ci
->ep0_dir
== RX
) ?
1141 ci
->ep0out
: ci
->ep0in
;
1142 if (!list_empty(&mEp
->qh
.queue
)) {
1144 retval
= -EOVERFLOW
;
1145 dev_warn(mEp
->ci
->dev
, "endpoint ctrl %X nuked\n",
1150 /* first nuke then test link, e.g. previous status has not sent */
1151 if (!list_empty(&mReq
->queue
)) {
1153 dev_err(mEp
->ci
->dev
, "request already in queue\n");
1157 if (req
->length
> 4 * CI13XXX_PAGE_SIZE
) {
1158 req
->length
= 4 * CI13XXX_PAGE_SIZE
;
1160 dev_warn(mEp
->ci
->dev
, "request length truncated\n");
1164 mReq
->req
.status
= -EINPROGRESS
;
1165 mReq
->req
.actual
= 0;
1167 retval
= _hardware_enqueue(mEp
, mReq
);
1169 if (retval
== -EALREADY
)
1172 list_add_tail(&mReq
->queue
, &mEp
->qh
.queue
);
1175 spin_unlock_irqrestore(mEp
->lock
, flags
);
1180 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
1182 * Check usb_ep_dequeue() at "usb_gadget.h" for details
1184 static int ep_dequeue(struct usb_ep
*ep
, struct usb_request
*req
)
1186 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1187 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1188 unsigned long flags
;
1190 if (ep
== NULL
|| req
== NULL
|| mReq
->req
.status
!= -EALREADY
||
1191 mEp
->ep
.desc
== NULL
|| list_empty(&mReq
->queue
) ||
1192 list_empty(&mEp
->qh
.queue
))
1195 spin_lock_irqsave(mEp
->lock
, flags
);
1197 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
1200 list_del_init(&mReq
->queue
);
1202 usb_gadget_unmap_request(&mEp
->ci
->gadget
, req
, mEp
->dir
);
1204 req
->status
= -ECONNRESET
;
1206 if (mReq
->req
.complete
!= NULL
) {
1207 spin_unlock(mEp
->lock
);
1208 mReq
->req
.complete(&mEp
->ep
, &mReq
->req
);
1209 spin_lock(mEp
->lock
);
1212 spin_unlock_irqrestore(mEp
->lock
, flags
);
1217 * ep_set_halt: sets the endpoint halt feature
1219 * Check usb_ep_set_halt() at "usb_gadget.h" for details
1221 static int ep_set_halt(struct usb_ep
*ep
, int value
)
1223 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1224 int direction
, retval
= 0;
1225 unsigned long flags
;
1227 if (ep
== NULL
|| mEp
->ep
.desc
== NULL
)
1230 spin_lock_irqsave(mEp
->lock
, flags
);
1233 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
1234 if (value
&& mEp
->type
== USB_ENDPOINT_XFER_BULK
&& mEp
->dir
== TX
&&
1235 !list_empty(&mEp
->qh
.queue
)) {
1236 spin_unlock_irqrestore(mEp
->lock
, flags
);
1241 direction
= mEp
->dir
;
1243 retval
|= hw_ep_set_halt(mEp
->ci
, mEp
->num
, mEp
->dir
, value
);
1248 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1249 mEp
->dir
= (mEp
->dir
== TX
) ? RX
: TX
;
1251 } while (mEp
->dir
!= direction
);
1253 spin_unlock_irqrestore(mEp
->lock
, flags
);
1258 * ep_set_wedge: sets the halt feature and ignores clear requests
1260 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
1262 static int ep_set_wedge(struct usb_ep
*ep
)
1264 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1265 unsigned long flags
;
1267 if (ep
== NULL
|| mEp
->ep
.desc
== NULL
)
1270 spin_lock_irqsave(mEp
->lock
, flags
);
1272 spin_unlock_irqrestore(mEp
->lock
, flags
);
1274 return usb_ep_set_halt(ep
);
1278 * ep_fifo_flush: flushes contents of a fifo
1280 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
1282 static void ep_fifo_flush(struct usb_ep
*ep
)
1284 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1285 unsigned long flags
;
1288 dev_err(mEp
->ci
->dev
, "%02X: -EINVAL\n", _usb_addr(mEp
));
1292 spin_lock_irqsave(mEp
->lock
, flags
);
1294 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
1296 spin_unlock_irqrestore(mEp
->lock
, flags
);
1300 * Endpoint-specific part of the API to the USB controller hardware
1301 * Check "usb_gadget.h" for details
1303 static const struct usb_ep_ops usb_ep_ops
= {
1304 .enable
= ep_enable
,
1305 .disable
= ep_disable
,
1306 .alloc_request
= ep_alloc_request
,
1307 .free_request
= ep_free_request
,
1309 .dequeue
= ep_dequeue
,
1310 .set_halt
= ep_set_halt
,
1311 .set_wedge
= ep_set_wedge
,
1312 .fifo_flush
= ep_fifo_flush
,
1315 /******************************************************************************
1317 *****************************************************************************/
1318 static int ci13xxx_vbus_session(struct usb_gadget
*_gadget
, int is_active
)
1320 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1321 unsigned long flags
;
1322 int gadget_ready
= 0;
1324 if (!(ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
))
1327 spin_lock_irqsave(&ci
->lock
, flags
);
1328 ci
->vbus_active
= is_active
;
1331 spin_unlock_irqrestore(&ci
->lock
, flags
);
1335 pm_runtime_get_sync(&_gadget
->dev
);
1336 hw_device_reset(ci
, USBMODE_CM_DC
);
1337 hw_device_state(ci
, ci
->ep0out
->qh
.dma
);
1339 hw_device_state(ci
, 0);
1340 if (ci
->platdata
->notify_event
)
1341 ci
->platdata
->notify_event(ci
,
1342 CI13XXX_CONTROLLER_STOPPED_EVENT
);
1343 _gadget_stop_activity(&ci
->gadget
);
1344 pm_runtime_put_sync(&_gadget
->dev
);
1351 static int ci13xxx_wakeup(struct usb_gadget
*_gadget
)
1353 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1354 unsigned long flags
;
1357 spin_lock_irqsave(&ci
->lock
, flags
);
1358 if (!ci
->remote_wakeup
) {
1362 if (!hw_read(ci
, OP_PORTSC
, PORTSC_SUSP
)) {
1366 hw_write(ci
, OP_PORTSC
, PORTSC_FPR
, PORTSC_FPR
);
1368 spin_unlock_irqrestore(&ci
->lock
, flags
);
1372 static int ci13xxx_vbus_draw(struct usb_gadget
*_gadget
, unsigned mA
)
1374 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1376 if (ci
->transceiver
)
1377 return usb_phy_set_power(ci
->transceiver
, mA
);
1381 /* Change Data+ pullup status
1382 * this func is used by usb_gadget_connect/disconnet
1384 static int ci13xxx_pullup(struct usb_gadget
*_gadget
, int is_on
)
1386 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1389 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, USBCMD_RS
);
1391 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, 0);
1396 static int ci13xxx_start(struct usb_gadget
*gadget
,
1397 struct usb_gadget_driver
*driver
);
1398 static int ci13xxx_stop(struct usb_gadget
*gadget
,
1399 struct usb_gadget_driver
*driver
);
1401 * Device operations part of the API to the USB controller hardware,
1402 * which don't involve endpoints (or i/o)
1403 * Check "usb_gadget.h" for details
1405 static const struct usb_gadget_ops usb_gadget_ops
= {
1406 .vbus_session
= ci13xxx_vbus_session
,
1407 .wakeup
= ci13xxx_wakeup
,
1408 .pullup
= ci13xxx_pullup
,
1409 .vbus_draw
= ci13xxx_vbus_draw
,
1410 .udc_start
= ci13xxx_start
,
1411 .udc_stop
= ci13xxx_stop
,
1414 static int init_eps(struct ci13xxx
*ci
)
1416 int retval
= 0, i
, j
;
1418 for (i
= 0; i
< ci
->hw_ep_max
/2; i
++)
1419 for (j
= RX
; j
<= TX
; j
++) {
1420 int k
= i
+ j
* ci
->hw_ep_max
/2;
1421 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[k
];
1423 scnprintf(mEp
->name
, sizeof(mEp
->name
), "ep%i%s", i
,
1424 (j
== TX
) ? "in" : "out");
1427 mEp
->lock
= &ci
->lock
;
1428 mEp
->td_pool
= ci
->td_pool
;
1430 mEp
->ep
.name
= mEp
->name
;
1431 mEp
->ep
.ops
= &usb_ep_ops
;
1433 * for ep0: maxP defined in desc, for other
1434 * eps, maxP is set by epautoconfig() called
1437 mEp
->ep
.maxpacket
= (unsigned short)~0;
1439 INIT_LIST_HEAD(&mEp
->qh
.queue
);
1440 mEp
->qh
.ptr
= dma_pool_alloc(ci
->qh_pool
, GFP_KERNEL
,
1442 if (mEp
->qh
.ptr
== NULL
)
1445 memset(mEp
->qh
.ptr
, 0, sizeof(*mEp
->qh
.ptr
));
1448 * set up shorthands for ep0 out and in endpoints,
1449 * don't add to gadget's ep_list
1457 mEp
->ep
.maxpacket
= CTRL_PAYLOAD_MAX
;
1461 list_add_tail(&mEp
->ep
.ep_list
, &ci
->gadget
.ep_list
);
1467 static void destroy_eps(struct ci13xxx
*ci
)
1471 for (i
= 0; i
< ci
->hw_ep_max
; i
++) {
1472 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[i
];
1474 dma_pool_free(ci
->qh_pool
, mEp
->qh
.ptr
, mEp
->qh
.dma
);
1479 * ci13xxx_start: register a gadget driver
1480 * @gadget: our gadget
1481 * @driver: the driver being registered
1483 * Interrupts are enabled here.
1485 static int ci13xxx_start(struct usb_gadget
*gadget
,
1486 struct usb_gadget_driver
*driver
)
1488 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
1489 unsigned long flags
;
1490 int retval
= -ENOMEM
;
1492 if (driver
->disconnect
== NULL
)
1496 ci
->ep0out
->ep
.desc
= &ctrl_endpt_out_desc
;
1497 retval
= usb_ep_enable(&ci
->ep0out
->ep
);
1501 ci
->ep0in
->ep
.desc
= &ctrl_endpt_in_desc
;
1502 retval
= usb_ep_enable(&ci
->ep0in
->ep
);
1505 spin_lock_irqsave(&ci
->lock
, flags
);
1507 ci
->driver
= driver
;
1508 pm_runtime_get_sync(&ci
->gadget
.dev
);
1509 if (ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
) {
1510 if (ci
->vbus_active
) {
1511 if (ci
->platdata
->flags
& CI13XXX_REGS_SHARED
)
1512 hw_device_reset(ci
, USBMODE_CM_DC
);
1514 pm_runtime_put_sync(&ci
->gadget
.dev
);
1519 retval
= hw_device_state(ci
, ci
->ep0out
->qh
.dma
);
1521 pm_runtime_put_sync(&ci
->gadget
.dev
);
1524 spin_unlock_irqrestore(&ci
->lock
, flags
);
1529 * ci13xxx_stop: unregister a gadget driver
1531 static int ci13xxx_stop(struct usb_gadget
*gadget
,
1532 struct usb_gadget_driver
*driver
)
1534 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
1535 unsigned long flags
;
1537 spin_lock_irqsave(&ci
->lock
, flags
);
1539 if (!(ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
) ||
1541 hw_device_state(ci
, 0);
1542 if (ci
->platdata
->notify_event
)
1543 ci
->platdata
->notify_event(ci
,
1544 CI13XXX_CONTROLLER_STOPPED_EVENT
);
1546 spin_unlock_irqrestore(&ci
->lock
, flags
);
1547 _gadget_stop_activity(&ci
->gadget
);
1548 spin_lock_irqsave(&ci
->lock
, flags
);
1549 pm_runtime_put(&ci
->gadget
.dev
);
1552 spin_unlock_irqrestore(&ci
->lock
, flags
);
1557 /******************************************************************************
1559 *****************************************************************************/
1561 * udc_irq: ci interrupt handler
1563 * This function returns IRQ_HANDLED if the IRQ has been handled
1564 * It locks access to registers
1566 static irqreturn_t
udc_irq(struct ci13xxx
*ci
)
1574 spin_lock(&ci
->lock
);
1576 if (ci
->platdata
->flags
& CI13XXX_REGS_SHARED
) {
1577 if (hw_read(ci
, OP_USBMODE
, USBMODE_CM
) !=
1579 spin_unlock(&ci
->lock
);
1583 intr
= hw_test_and_clear_intr_active(ci
);
1586 /* order defines priority - do NOT change it */
1587 if (USBi_URI
& intr
)
1588 isr_reset_handler(ci
);
1590 if (USBi_PCI
& intr
) {
1591 ci
->gadget
.speed
= hw_port_is_high_speed(ci
) ?
1592 USB_SPEED_HIGH
: USB_SPEED_FULL
;
1593 if (ci
->suspended
&& ci
->driver
->resume
) {
1594 spin_unlock(&ci
->lock
);
1595 ci
->driver
->resume(&ci
->gadget
);
1596 spin_lock(&ci
->lock
);
1602 isr_tr_complete_handler(ci
);
1604 if (USBi_SLI
& intr
) {
1605 if (ci
->gadget
.speed
!= USB_SPEED_UNKNOWN
&&
1606 ci
->driver
->suspend
) {
1608 spin_unlock(&ci
->lock
);
1609 ci
->driver
->suspend(&ci
->gadget
);
1610 spin_lock(&ci
->lock
);
1613 retval
= IRQ_HANDLED
;
1617 spin_unlock(&ci
->lock
);
1623 * udc_release: driver release function
1626 * Currently does nothing
1628 static void udc_release(struct device
*dev
)
1633 * udc_start: initialize gadget role
1634 * @ci: chipidea controller
1636 static int udc_start(struct ci13xxx
*ci
)
1638 struct device
*dev
= ci
->dev
;
1641 spin_lock_init(&ci
->lock
);
1643 ci
->gadget
.ops
= &usb_gadget_ops
;
1644 ci
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1645 ci
->gadget
.max_speed
= USB_SPEED_HIGH
;
1646 ci
->gadget
.is_otg
= 0;
1647 ci
->gadget
.name
= ci
->platdata
->name
;
1649 INIT_LIST_HEAD(&ci
->gadget
.ep_list
);
1651 dev_set_name(&ci
->gadget
.dev
, "gadget");
1652 ci
->gadget
.dev
.dma_mask
= dev
->dma_mask
;
1653 ci
->gadget
.dev
.coherent_dma_mask
= dev
->coherent_dma_mask
;
1654 ci
->gadget
.dev
.parent
= dev
;
1655 ci
->gadget
.dev
.release
= udc_release
;
1657 /* alloc resources */
1658 ci
->qh_pool
= dma_pool_create("ci13xxx_qh", dev
,
1659 sizeof(struct ci13xxx_qh
),
1660 64, CI13XXX_PAGE_SIZE
);
1661 if (ci
->qh_pool
== NULL
)
1664 ci
->td_pool
= dma_pool_create("ci13xxx_td", dev
,
1665 sizeof(struct ci13xxx_td
),
1666 64, CI13XXX_PAGE_SIZE
);
1667 if (ci
->td_pool
== NULL
) {
1672 retval
= init_eps(ci
);
1676 ci
->gadget
.ep0
= &ci
->ep0in
->ep
;
1679 ci
->transceiver
= usb_get_phy(USB_PHY_TYPE_USB2
);
1681 if (ci
->platdata
->flags
& CI13XXX_REQUIRE_TRANSCEIVER
) {
1682 if (ci
->transceiver
== NULL
) {
1688 if (!(ci
->platdata
->flags
& CI13XXX_REGS_SHARED
)) {
1689 retval
= hw_device_reset(ci
, USBMODE_CM_DC
);
1691 goto put_transceiver
;
1694 retval
= device_register(&ci
->gadget
.dev
);
1696 put_device(&ci
->gadget
.dev
);
1697 goto put_transceiver
;
1700 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1701 retval
= otg_set_peripheral(ci
->transceiver
->otg
,
1707 retval
= usb_add_gadget_udc(dev
, &ci
->gadget
);
1711 pm_runtime_no_callbacks(&ci
->gadget
.dev
);
1712 pm_runtime_enable(&ci
->gadget
.dev
);
1717 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1718 otg_set_peripheral(ci
->transceiver
->otg
, NULL
);
1720 usb_put_phy(ci
->transceiver
);
1723 dev_err(dev
, "error = %i\n", retval
);
1725 device_unregister(&ci
->gadget
.dev
);
1727 if (!IS_ERR_OR_NULL(ci
->transceiver
) && ci
->global_phy
)
1728 usb_put_phy(ci
->transceiver
);
1732 dma_pool_destroy(ci
->td_pool
);
1734 dma_pool_destroy(ci
->qh_pool
);
1739 * udc_remove: parent remove must call this to remove UDC
1741 * No interrupts active, the IRQ has been released
1743 static void udc_stop(struct ci13xxx
*ci
)
1748 usb_del_gadget_udc(&ci
->gadget
);
1752 dma_pool_destroy(ci
->td_pool
);
1753 dma_pool_destroy(ci
->qh_pool
);
1755 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1756 otg_set_peripheral(ci
->transceiver
->otg
, NULL
);
1758 usb_put_phy(ci
->transceiver
);
1760 device_unregister(&ci
->gadget
.dev
);
1761 /* my kobject is dynamic, I swear! */
1762 memset(&ci
->gadget
, 0, sizeof(ci
->gadget
));
1766 * ci_hdrc_gadget_init - initialize device related bits
1767 * ci: the controller
1769 * This function enables the gadget role, if the device is "device capable".
1771 int ci_hdrc_gadget_init(struct ci13xxx
*ci
)
1773 struct ci_role_driver
*rdrv
;
1775 if (!hw_read(ci
, CAP_DCCPARAMS
, DCCPARAMS_DC
))
1778 rdrv
= devm_kzalloc(ci
->dev
, sizeof(struct ci_role_driver
), GFP_KERNEL
);
1782 rdrv
->start
= udc_start
;
1783 rdrv
->stop
= udc_stop
;
1784 rdrv
->irq
= udc_irq
;
1785 rdrv
->name
= "gadget";
1786 ci
->roles
[CI_ROLE_GADGET
] = rdrv
;