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(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(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(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
= cpu_to_le32(TD_TERMINATE
);
408 mReq
->zptr
->token
= cpu_to_le32(TD_STATUS_ACTIVE
);
409 if (!mReq
->req
.no_interrupt
)
410 mReq
->zptr
->token
|= cpu_to_le32(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
= cpu_to_le32(length
<< __ffs(TD_TOTAL_BYTES
));
422 mReq
->ptr
->token
&= cpu_to_le32(TD_TOTAL_BYTES
);
423 mReq
->ptr
->token
|= cpu_to_le32(TD_STATUS_ACTIVE
);
425 mReq
->ptr
->next
= cpu_to_le32(mReq
->zdma
);
427 mReq
->ptr
->next
= cpu_to_le32(TD_TERMINATE
);
428 if (!mReq
->req
.no_interrupt
)
429 mReq
->ptr
->token
|= cpu_to_le32(TD_IOC
);
431 mReq
->ptr
->page
[0] = cpu_to_le32(mReq
->req
.dma
);
432 for (i
= 1; i
< 5; i
++) {
433 u32 page
= mReq
->req
.dma
+ i
* CI13XXX_PAGE_SIZE
;
434 page
&= ~TD_RESERVED_MASK
;
435 mReq
->ptr
->page
[i
] = cpu_to_le32(page
);
438 if (!list_empty(&mEp
->qh
.queue
)) {
439 struct ci13xxx_req
*mReqPrev
;
440 int n
= hw_ep_bit(mEp
->num
, mEp
->dir
);
442 u32 next
= mReq
->dma
& TD_ADDR_MASK
;
444 mReqPrev
= list_entry(mEp
->qh
.queue
.prev
,
445 struct ci13xxx_req
, queue
);
447 mReqPrev
->zptr
->next
= cpu_to_le32(next
);
449 mReqPrev
->ptr
->next
= cpu_to_le32(next
);
451 if (hw_read(ci
, OP_ENDPTPRIME
, BIT(n
)))
454 hw_write(ci
, OP_USBCMD
, USBCMD_ATDTW
, USBCMD_ATDTW
);
455 tmp_stat
= hw_read(ci
, OP_ENDPTSTAT
, BIT(n
));
456 } while (!hw_read(ci
, OP_USBCMD
, USBCMD_ATDTW
));
457 hw_write(ci
, OP_USBCMD
, USBCMD_ATDTW
, 0);
462 /* QH configuration */
463 mEp
->qh
.ptr
->td
.next
= cpu_to_le32(mReq
->dma
); /* TERMINATE = 0 */
464 mEp
->qh
.ptr
->td
.token
&=
465 cpu_to_le32(~(TD_STATUS_HALTED
|TD_STATUS_ACTIVE
));
467 wmb(); /* synchronize before ep prime */
469 ret
= hw_ep_prime(ci
, mEp
->num
, mEp
->dir
,
470 mEp
->type
== USB_ENDPOINT_XFER_CONTROL
);
476 * _hardware_dequeue: handles a request at hardware level
480 * This function returns an error code
482 static int _hardware_dequeue(struct ci13xxx_ep
*mEp
, struct ci13xxx_req
*mReq
)
484 u32 tmptoken
= le32_to_cpu(mReq
->ptr
->token
);
486 if (mReq
->req
.status
!= -EALREADY
)
489 if ((TD_STATUS_ACTIVE
& tmptoken
) != 0)
493 if ((cpu_to_le32(TD_STATUS_ACTIVE
) & mReq
->zptr
->token
) != 0)
495 dma_pool_free(mEp
->td_pool
, mReq
->zptr
, mReq
->zdma
);
499 mReq
->req
.status
= 0;
501 usb_gadget_unmap_request(&mEp
->ci
->gadget
, &mReq
->req
, mEp
->dir
);
503 mReq
->req
.status
= tmptoken
& TD_STATUS
;
504 if ((TD_STATUS_HALTED
& mReq
->req
.status
) != 0)
505 mReq
->req
.status
= -1;
506 else if ((TD_STATUS_DT_ERR
& mReq
->req
.status
) != 0)
507 mReq
->req
.status
= -1;
508 else if ((TD_STATUS_TR_ERR
& mReq
->req
.status
) != 0)
509 mReq
->req
.status
= -1;
511 mReq
->req
.actual
= tmptoken
& TD_TOTAL_BYTES
;
512 mReq
->req
.actual
>>= __ffs(TD_TOTAL_BYTES
);
513 mReq
->req
.actual
= mReq
->req
.length
- mReq
->req
.actual
;
514 mReq
->req
.actual
= mReq
->req
.status
? 0 : mReq
->req
.actual
;
516 return mReq
->req
.actual
;
520 * _ep_nuke: dequeues all endpoint requests
523 * This function returns an error code
524 * Caller must hold lock
526 static int _ep_nuke(struct ci13xxx_ep
*mEp
)
527 __releases(mEp
->lock
)
528 __acquires(mEp
->lock
)
533 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
535 while (!list_empty(&mEp
->qh
.queue
)) {
537 /* pop oldest request */
538 struct ci13xxx_req
*mReq
= \
539 list_entry(mEp
->qh
.queue
.next
,
540 struct ci13xxx_req
, queue
);
541 list_del_init(&mReq
->queue
);
542 mReq
->req
.status
= -ESHUTDOWN
;
544 if (mReq
->req
.complete
!= NULL
) {
545 spin_unlock(mEp
->lock
);
546 mReq
->req
.complete(&mEp
->ep
, &mReq
->req
);
547 spin_lock(mEp
->lock
);
554 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
557 * This function returns an error code
559 static int _gadget_stop_activity(struct usb_gadget
*gadget
)
562 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
565 spin_lock_irqsave(&ci
->lock
, flags
);
566 ci
->gadget
.speed
= USB_SPEED_UNKNOWN
;
567 ci
->remote_wakeup
= 0;
569 spin_unlock_irqrestore(&ci
->lock
, flags
);
571 /* flush all endpoints */
572 gadget_for_each_ep(ep
, gadget
) {
573 usb_ep_fifo_flush(ep
);
575 usb_ep_fifo_flush(&ci
->ep0out
->ep
);
576 usb_ep_fifo_flush(&ci
->ep0in
->ep
);
579 ci
->driver
->disconnect(gadget
);
581 /* make sure to disable all endpoints */
582 gadget_for_each_ep(ep
, gadget
) {
586 if (ci
->status
!= NULL
) {
587 usb_ep_free_request(&ci
->ep0in
->ep
, ci
->status
);
594 /******************************************************************************
596 *****************************************************************************/
598 * isr_reset_handler: USB reset interrupt handler
601 * This function resets USB engine after a bus reset occurred
603 static void isr_reset_handler(struct ci13xxx
*ci
)
609 spin_unlock(&ci
->lock
);
610 retval
= _gadget_stop_activity(&ci
->gadget
);
614 retval
= hw_usb_reset(ci
);
618 ci
->status
= usb_ep_alloc_request(&ci
->ep0in
->ep
, GFP_ATOMIC
);
619 if (ci
->status
== NULL
)
623 spin_lock(&ci
->lock
);
626 dev_err(ci
->dev
, "error: %i\n", retval
);
630 * isr_get_status_complete: get_status request complete function
632 * @req: request handled
634 * Caller must release lock
636 static void isr_get_status_complete(struct usb_ep
*ep
, struct usb_request
*req
)
638 if (ep
== NULL
|| req
== NULL
)
642 usb_ep_free_request(ep
, req
);
646 * isr_get_status_response: get_status request response
648 * @setup: setup request packet
650 * This function returns an error code
652 static int isr_get_status_response(struct ci13xxx
*ci
,
653 struct usb_ctrlrequest
*setup
)
654 __releases(mEp
->lock
)
655 __acquires(mEp
->lock
)
657 struct ci13xxx_ep
*mEp
= ci
->ep0in
;
658 struct usb_request
*req
= NULL
;
659 gfp_t gfp_flags
= GFP_ATOMIC
;
660 int dir
, num
, retval
;
662 if (mEp
== NULL
|| setup
== NULL
)
665 spin_unlock(mEp
->lock
);
666 req
= usb_ep_alloc_request(&mEp
->ep
, gfp_flags
);
667 spin_lock(mEp
->lock
);
671 req
->complete
= isr_get_status_complete
;
673 req
->buf
= kzalloc(req
->length
, gfp_flags
);
674 if (req
->buf
== NULL
) {
679 if ((setup
->bRequestType
& USB_RECIP_MASK
) == USB_RECIP_DEVICE
) {
680 /* Assume that device is bus powered for now. */
681 *(u16
*)req
->buf
= ci
->remote_wakeup
<< 1;
683 } else if ((setup
->bRequestType
& USB_RECIP_MASK
) \
684 == USB_RECIP_ENDPOINT
) {
685 dir
= (le16_to_cpu(setup
->wIndex
) & USB_ENDPOINT_DIR_MASK
) ?
687 num
= le16_to_cpu(setup
->wIndex
) & USB_ENDPOINT_NUMBER_MASK
;
688 *(u16
*)req
->buf
= hw_ep_get_halt(ci
, num
, dir
);
690 /* else do nothing; reserved for future use */
692 spin_unlock(mEp
->lock
);
693 retval
= usb_ep_queue(&mEp
->ep
, req
, gfp_flags
);
694 spin_lock(mEp
->lock
);
703 spin_unlock(mEp
->lock
);
704 usb_ep_free_request(&mEp
->ep
, req
);
705 spin_lock(mEp
->lock
);
710 * isr_setup_status_complete: setup_status request complete function
712 * @req: request handled
714 * Caller must release lock. Put the port in test mode if test mode
715 * feature is selected.
718 isr_setup_status_complete(struct usb_ep
*ep
, struct usb_request
*req
)
720 struct ci13xxx
*ci
= req
->context
;
724 hw_usb_set_address(ci
, ci
->address
);
728 spin_lock_irqsave(&ci
->lock
, flags
);
730 hw_port_test_set(ci
, ci
->test_mode
);
731 spin_unlock_irqrestore(&ci
->lock
, flags
);
735 * isr_setup_status_phase: queues the status phase of a setup transation
738 * This function returns an error code
740 static int isr_setup_status_phase(struct ci13xxx
*ci
)
741 __releases(mEp
->lock
)
742 __acquires(mEp
->lock
)
745 struct ci13xxx_ep
*mEp
;
747 mEp
= (ci
->ep0_dir
== TX
) ? ci
->ep0out
: ci
->ep0in
;
748 ci
->status
->context
= ci
;
749 ci
->status
->complete
= isr_setup_status_complete
;
751 spin_unlock(mEp
->lock
);
752 retval
= usb_ep_queue(&mEp
->ep
, ci
->status
, GFP_ATOMIC
);
753 spin_lock(mEp
->lock
);
759 * isr_tr_complete_low: transaction complete low level handler
762 * This function returns an error code
763 * Caller must hold lock
765 static int isr_tr_complete_low(struct ci13xxx_ep
*mEp
)
766 __releases(mEp
->lock
)
767 __acquires(mEp
->lock
)
769 struct ci13xxx_req
*mReq
, *mReqTemp
;
770 struct ci13xxx_ep
*mEpTemp
= mEp
;
773 list_for_each_entry_safe(mReq
, mReqTemp
, &mEp
->qh
.queue
,
775 retval
= _hardware_dequeue(mEp
, mReq
);
778 list_del_init(&mReq
->queue
);
779 if (mReq
->req
.complete
!= NULL
) {
780 spin_unlock(mEp
->lock
);
781 if ((mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) &&
783 mEpTemp
= mEp
->ci
->ep0in
;
784 mReq
->req
.complete(&mEpTemp
->ep
, &mReq
->req
);
785 spin_lock(mEp
->lock
);
789 if (retval
== -EBUSY
)
796 * isr_tr_complete_handler: transaction complete interrupt handler
797 * @ci: UDC descriptor
799 * This function handles traffic events
801 static void isr_tr_complete_handler(struct ci13xxx
*ci
)
808 for (i
= 0; i
< ci
->hw_ep_max
; i
++) {
809 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[i
];
810 int type
, num
, dir
, err
= -EINVAL
;
811 struct usb_ctrlrequest req
;
813 if (mEp
->ep
.desc
== NULL
)
814 continue; /* not configured */
816 if (hw_test_and_clear_complete(ci
, i
)) {
817 err
= isr_tr_complete_low(mEp
);
818 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) {
819 if (err
> 0) /* needs status phase */
820 err
= isr_setup_status_phase(ci
);
822 spin_unlock(&ci
->lock
);
823 if (usb_ep_set_halt(&mEp
->ep
))
825 "error: ep_set_halt\n");
826 spin_lock(&ci
->lock
);
831 if (mEp
->type
!= USB_ENDPOINT_XFER_CONTROL
||
832 !hw_test_and_clear_setup_status(ci
, i
))
836 dev_warn(ci
->dev
, "ctrl traffic at endpoint %d\n", i
);
841 * Flush data and handshake transactions of previous
844 _ep_nuke(ci
->ep0out
);
847 /* read_setup_packet */
849 hw_test_and_set_setup_guard(ci
);
850 memcpy(&req
, &mEp
->qh
.ptr
->setup
, sizeof(req
));
851 } while (!hw_test_and_clear_setup_guard(ci
));
853 type
= req
.bRequestType
;
855 ci
->ep0_dir
= (type
& USB_DIR_IN
) ? TX
: RX
;
857 switch (req
.bRequest
) {
858 case USB_REQ_CLEAR_FEATURE
:
859 if (type
== (USB_DIR_OUT
|USB_RECIP_ENDPOINT
) &&
860 le16_to_cpu(req
.wValue
) ==
862 if (req
.wLength
!= 0)
864 num
= le16_to_cpu(req
.wIndex
);
865 dir
= num
& USB_ENDPOINT_DIR_MASK
;
866 num
&= USB_ENDPOINT_NUMBER_MASK
;
868 num
+= ci
->hw_ep_max
/2;
869 if (!ci
->ci13xxx_ep
[num
].wedge
) {
870 spin_unlock(&ci
->lock
);
871 err
= usb_ep_clear_halt(
872 &ci
->ci13xxx_ep
[num
].ep
);
873 spin_lock(&ci
->lock
);
877 err
= isr_setup_status_phase(ci
);
878 } else if (type
== (USB_DIR_OUT
|USB_RECIP_DEVICE
) &&
879 le16_to_cpu(req
.wValue
) ==
880 USB_DEVICE_REMOTE_WAKEUP
) {
881 if (req
.wLength
!= 0)
883 ci
->remote_wakeup
= 0;
884 err
= isr_setup_status_phase(ci
);
889 case USB_REQ_GET_STATUS
:
890 if (type
!= (USB_DIR_IN
|USB_RECIP_DEVICE
) &&
891 type
!= (USB_DIR_IN
|USB_RECIP_ENDPOINT
) &&
892 type
!= (USB_DIR_IN
|USB_RECIP_INTERFACE
))
894 if (le16_to_cpu(req
.wLength
) != 2 ||
895 le16_to_cpu(req
.wValue
) != 0)
897 err
= isr_get_status_response(ci
, &req
);
899 case USB_REQ_SET_ADDRESS
:
900 if (type
!= (USB_DIR_OUT
|USB_RECIP_DEVICE
))
902 if (le16_to_cpu(req
.wLength
) != 0 ||
903 le16_to_cpu(req
.wIndex
) != 0)
905 ci
->address
= (u8
)le16_to_cpu(req
.wValue
);
907 err
= isr_setup_status_phase(ci
);
909 case USB_REQ_SET_FEATURE
:
910 if (type
== (USB_DIR_OUT
|USB_RECIP_ENDPOINT
) &&
911 le16_to_cpu(req
.wValue
) ==
913 if (req
.wLength
!= 0)
915 num
= le16_to_cpu(req
.wIndex
);
916 dir
= num
& USB_ENDPOINT_DIR_MASK
;
917 num
&= USB_ENDPOINT_NUMBER_MASK
;
919 num
+= ci
->hw_ep_max
/2;
921 spin_unlock(&ci
->lock
);
922 err
= usb_ep_set_halt(&ci
->ci13xxx_ep
[num
].ep
);
923 spin_lock(&ci
->lock
);
925 isr_setup_status_phase(ci
);
926 } else if (type
== (USB_DIR_OUT
|USB_RECIP_DEVICE
)) {
927 if (req
.wLength
!= 0)
929 switch (le16_to_cpu(req
.wValue
)) {
930 case USB_DEVICE_REMOTE_WAKEUP
:
931 ci
->remote_wakeup
= 1;
932 err
= isr_setup_status_phase(ci
);
934 case USB_DEVICE_TEST_MODE
:
935 tmode
= le16_to_cpu(req
.wIndex
) >> 8;
942 ci
->test_mode
= tmode
;
943 err
= isr_setup_status_phase(
958 if (req
.wLength
== 0) /* no data phase */
961 spin_unlock(&ci
->lock
);
962 err
= ci
->driver
->setup(&ci
->gadget
, &req
);
963 spin_lock(&ci
->lock
);
968 spin_unlock(&ci
->lock
);
969 if (usb_ep_set_halt(&mEp
->ep
))
970 dev_err(ci
->dev
, "error: ep_set_halt\n");
971 spin_lock(&ci
->lock
);
976 /******************************************************************************
978 *****************************************************************************/
980 * ep_enable: configure endpoint, making it usable
982 * Check usb_ep_enable() at "usb_gadget.h" for details
984 static int ep_enable(struct usb_ep
*ep
,
985 const struct usb_endpoint_descriptor
*desc
)
987 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
992 if (ep
== NULL
|| desc
== NULL
)
995 spin_lock_irqsave(mEp
->lock
, flags
);
997 /* only internal SW should enable ctrl endpts */
1001 if (!list_empty(&mEp
->qh
.queue
))
1002 dev_warn(mEp
->ci
->dev
, "enabling a non-empty endpoint!\n");
1004 mEp
->dir
= usb_endpoint_dir_in(desc
) ? TX
: RX
;
1005 mEp
->num
= usb_endpoint_num(desc
);
1006 mEp
->type
= usb_endpoint_type(desc
);
1008 mEp
->ep
.maxpacket
= usb_endpoint_maxp(desc
);
1010 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1014 cap
|= (mEp
->ep
.maxpacket
<< __ffs(QH_MAX_PKT
)) & QH_MAX_PKT
;
1016 mEp
->qh
.ptr
->cap
= cpu_to_le32(cap
);
1018 mEp
->qh
.ptr
->td
.next
|= cpu_to_le32(TD_TERMINATE
); /* needed? */
1021 * Enable endpoints in the HW other than ep0 as ep0
1025 retval
|= hw_ep_enable(mEp
->ci
, mEp
->num
, mEp
->dir
, mEp
->type
);
1027 spin_unlock_irqrestore(mEp
->lock
, flags
);
1032 * ep_disable: endpoint is no longer usable
1034 * Check usb_ep_disable() at "usb_gadget.h" for details
1036 static int ep_disable(struct usb_ep
*ep
)
1038 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1039 int direction
, retval
= 0;
1040 unsigned long flags
;
1044 else if (mEp
->ep
.desc
== NULL
)
1047 spin_lock_irqsave(mEp
->lock
, flags
);
1049 /* only internal SW should disable ctrl endpts */
1051 direction
= mEp
->dir
;
1053 retval
|= _ep_nuke(mEp
);
1054 retval
|= hw_ep_disable(mEp
->ci
, mEp
->num
, mEp
->dir
);
1056 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1057 mEp
->dir
= (mEp
->dir
== TX
) ? RX
: TX
;
1059 } while (mEp
->dir
!= direction
);
1061 mEp
->ep
.desc
= NULL
;
1063 spin_unlock_irqrestore(mEp
->lock
, flags
);
1068 * ep_alloc_request: allocate a request object to use with this endpoint
1070 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
1072 static struct usb_request
*ep_alloc_request(struct usb_ep
*ep
, gfp_t gfp_flags
)
1074 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1075 struct ci13xxx_req
*mReq
= NULL
;
1080 mReq
= kzalloc(sizeof(struct ci13xxx_req
), gfp_flags
);
1082 INIT_LIST_HEAD(&mReq
->queue
);
1084 mReq
->ptr
= dma_pool_alloc(mEp
->td_pool
, gfp_flags
,
1086 if (mReq
->ptr
== NULL
) {
1092 return (mReq
== NULL
) ? NULL
: &mReq
->req
;
1096 * ep_free_request: frees a request object
1098 * Check usb_ep_free_request() at "usb_gadget.h" for details
1100 static void ep_free_request(struct usb_ep
*ep
, struct usb_request
*req
)
1102 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1103 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1104 unsigned long flags
;
1106 if (ep
== NULL
|| req
== NULL
) {
1108 } else if (!list_empty(&mReq
->queue
)) {
1109 dev_err(mEp
->ci
->dev
, "freeing queued request\n");
1113 spin_lock_irqsave(mEp
->lock
, flags
);
1116 dma_pool_free(mEp
->td_pool
, mReq
->ptr
, mReq
->dma
);
1119 spin_unlock_irqrestore(mEp
->lock
, flags
);
1123 * ep_queue: queues (submits) an I/O request to an endpoint
1125 * Check usb_ep_queue()* at usb_gadget.h" for details
1127 static int ep_queue(struct usb_ep
*ep
, struct usb_request
*req
,
1128 gfp_t __maybe_unused gfp_flags
)
1130 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1131 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1132 struct ci13xxx
*ci
= mEp
->ci
;
1134 unsigned long flags
;
1136 if (ep
== NULL
|| req
== NULL
|| mEp
->ep
.desc
== NULL
)
1139 spin_lock_irqsave(mEp
->lock
, flags
);
1141 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
) {
1143 mEp
= (ci
->ep0_dir
== RX
) ?
1144 ci
->ep0out
: ci
->ep0in
;
1145 if (!list_empty(&mEp
->qh
.queue
)) {
1147 retval
= -EOVERFLOW
;
1148 dev_warn(mEp
->ci
->dev
, "endpoint ctrl %X nuked\n",
1153 /* first nuke then test link, e.g. previous status has not sent */
1154 if (!list_empty(&mReq
->queue
)) {
1156 dev_err(mEp
->ci
->dev
, "request already in queue\n");
1160 if (req
->length
> 4 * CI13XXX_PAGE_SIZE
) {
1161 req
->length
= 4 * CI13XXX_PAGE_SIZE
;
1163 dev_warn(mEp
->ci
->dev
, "request length truncated\n");
1167 mReq
->req
.status
= -EINPROGRESS
;
1168 mReq
->req
.actual
= 0;
1170 retval
= _hardware_enqueue(mEp
, mReq
);
1172 if (retval
== -EALREADY
)
1175 list_add_tail(&mReq
->queue
, &mEp
->qh
.queue
);
1178 spin_unlock_irqrestore(mEp
->lock
, flags
);
1183 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
1185 * Check usb_ep_dequeue() at "usb_gadget.h" for details
1187 static int ep_dequeue(struct usb_ep
*ep
, struct usb_request
*req
)
1189 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1190 struct ci13xxx_req
*mReq
= container_of(req
, struct ci13xxx_req
, req
);
1191 unsigned long flags
;
1193 if (ep
== NULL
|| req
== NULL
|| mReq
->req
.status
!= -EALREADY
||
1194 mEp
->ep
.desc
== NULL
|| list_empty(&mReq
->queue
) ||
1195 list_empty(&mEp
->qh
.queue
))
1198 spin_lock_irqsave(mEp
->lock
, flags
);
1200 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
1203 list_del_init(&mReq
->queue
);
1205 usb_gadget_unmap_request(&mEp
->ci
->gadget
, req
, mEp
->dir
);
1207 req
->status
= -ECONNRESET
;
1209 if (mReq
->req
.complete
!= NULL
) {
1210 spin_unlock(mEp
->lock
);
1211 mReq
->req
.complete(&mEp
->ep
, &mReq
->req
);
1212 spin_lock(mEp
->lock
);
1215 spin_unlock_irqrestore(mEp
->lock
, flags
);
1220 * ep_set_halt: sets the endpoint halt feature
1222 * Check usb_ep_set_halt() at "usb_gadget.h" for details
1224 static int ep_set_halt(struct usb_ep
*ep
, int value
)
1226 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1227 int direction
, retval
= 0;
1228 unsigned long flags
;
1230 if (ep
== NULL
|| mEp
->ep
.desc
== NULL
)
1233 spin_lock_irqsave(mEp
->lock
, flags
);
1236 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
1237 if (value
&& mEp
->type
== USB_ENDPOINT_XFER_BULK
&& mEp
->dir
== TX
&&
1238 !list_empty(&mEp
->qh
.queue
)) {
1239 spin_unlock_irqrestore(mEp
->lock
, flags
);
1244 direction
= mEp
->dir
;
1246 retval
|= hw_ep_set_halt(mEp
->ci
, mEp
->num
, mEp
->dir
, value
);
1251 if (mEp
->type
== USB_ENDPOINT_XFER_CONTROL
)
1252 mEp
->dir
= (mEp
->dir
== TX
) ? RX
: TX
;
1254 } while (mEp
->dir
!= direction
);
1256 spin_unlock_irqrestore(mEp
->lock
, flags
);
1261 * ep_set_wedge: sets the halt feature and ignores clear requests
1263 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
1265 static int ep_set_wedge(struct usb_ep
*ep
)
1267 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1268 unsigned long flags
;
1270 if (ep
== NULL
|| mEp
->ep
.desc
== NULL
)
1273 spin_lock_irqsave(mEp
->lock
, flags
);
1275 spin_unlock_irqrestore(mEp
->lock
, flags
);
1277 return usb_ep_set_halt(ep
);
1281 * ep_fifo_flush: flushes contents of a fifo
1283 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
1285 static void ep_fifo_flush(struct usb_ep
*ep
)
1287 struct ci13xxx_ep
*mEp
= container_of(ep
, struct ci13xxx_ep
, ep
);
1288 unsigned long flags
;
1291 dev_err(mEp
->ci
->dev
, "%02X: -EINVAL\n", _usb_addr(mEp
));
1295 spin_lock_irqsave(mEp
->lock
, flags
);
1297 hw_ep_flush(mEp
->ci
, mEp
->num
, mEp
->dir
);
1299 spin_unlock_irqrestore(mEp
->lock
, flags
);
1303 * Endpoint-specific part of the API to the USB controller hardware
1304 * Check "usb_gadget.h" for details
1306 static const struct usb_ep_ops usb_ep_ops
= {
1307 .enable
= ep_enable
,
1308 .disable
= ep_disable
,
1309 .alloc_request
= ep_alloc_request
,
1310 .free_request
= ep_free_request
,
1312 .dequeue
= ep_dequeue
,
1313 .set_halt
= ep_set_halt
,
1314 .set_wedge
= ep_set_wedge
,
1315 .fifo_flush
= ep_fifo_flush
,
1318 /******************************************************************************
1320 *****************************************************************************/
1321 static int ci13xxx_vbus_session(struct usb_gadget
*_gadget
, int is_active
)
1323 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1324 unsigned long flags
;
1325 int gadget_ready
= 0;
1327 if (!(ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
))
1330 spin_lock_irqsave(&ci
->lock
, flags
);
1331 ci
->vbus_active
= is_active
;
1334 spin_unlock_irqrestore(&ci
->lock
, flags
);
1338 pm_runtime_get_sync(&_gadget
->dev
);
1339 hw_device_reset(ci
, USBMODE_CM_DC
);
1340 hw_device_state(ci
, ci
->ep0out
->qh
.dma
);
1342 hw_device_state(ci
, 0);
1343 if (ci
->platdata
->notify_event
)
1344 ci
->platdata
->notify_event(ci
,
1345 CI13XXX_CONTROLLER_STOPPED_EVENT
);
1346 _gadget_stop_activity(&ci
->gadget
);
1347 pm_runtime_put_sync(&_gadget
->dev
);
1354 static int ci13xxx_wakeup(struct usb_gadget
*_gadget
)
1356 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1357 unsigned long flags
;
1360 spin_lock_irqsave(&ci
->lock
, flags
);
1361 if (!ci
->remote_wakeup
) {
1365 if (!hw_read(ci
, OP_PORTSC
, PORTSC_SUSP
)) {
1369 hw_write(ci
, OP_PORTSC
, PORTSC_FPR
, PORTSC_FPR
);
1371 spin_unlock_irqrestore(&ci
->lock
, flags
);
1375 static int ci13xxx_vbus_draw(struct usb_gadget
*_gadget
, unsigned mA
)
1377 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1379 if (ci
->transceiver
)
1380 return usb_phy_set_power(ci
->transceiver
, mA
);
1384 /* Change Data+ pullup status
1385 * this func is used by usb_gadget_connect/disconnet
1387 static int ci13xxx_pullup(struct usb_gadget
*_gadget
, int is_on
)
1389 struct ci13xxx
*ci
= container_of(_gadget
, struct ci13xxx
, gadget
);
1392 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, USBCMD_RS
);
1394 hw_write(ci
, OP_USBCMD
, USBCMD_RS
, 0);
1399 static int ci13xxx_start(struct usb_gadget
*gadget
,
1400 struct usb_gadget_driver
*driver
);
1401 static int ci13xxx_stop(struct usb_gadget
*gadget
,
1402 struct usb_gadget_driver
*driver
);
1404 * Device operations part of the API to the USB controller hardware,
1405 * which don't involve endpoints (or i/o)
1406 * Check "usb_gadget.h" for details
1408 static const struct usb_gadget_ops usb_gadget_ops
= {
1409 .vbus_session
= ci13xxx_vbus_session
,
1410 .wakeup
= ci13xxx_wakeup
,
1411 .pullup
= ci13xxx_pullup
,
1412 .vbus_draw
= ci13xxx_vbus_draw
,
1413 .udc_start
= ci13xxx_start
,
1414 .udc_stop
= ci13xxx_stop
,
1417 static int init_eps(struct ci13xxx
*ci
)
1419 int retval
= 0, i
, j
;
1421 for (i
= 0; i
< ci
->hw_ep_max
/2; i
++)
1422 for (j
= RX
; j
<= TX
; j
++) {
1423 int k
= i
+ j
* ci
->hw_ep_max
/2;
1424 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[k
];
1426 scnprintf(mEp
->name
, sizeof(mEp
->name
), "ep%i%s", i
,
1427 (j
== TX
) ? "in" : "out");
1430 mEp
->lock
= &ci
->lock
;
1431 mEp
->td_pool
= ci
->td_pool
;
1433 mEp
->ep
.name
= mEp
->name
;
1434 mEp
->ep
.ops
= &usb_ep_ops
;
1436 * for ep0: maxP defined in desc, for other
1437 * eps, maxP is set by epautoconfig() called
1440 mEp
->ep
.maxpacket
= (unsigned short)~0;
1442 INIT_LIST_HEAD(&mEp
->qh
.queue
);
1443 mEp
->qh
.ptr
= dma_pool_alloc(ci
->qh_pool
, GFP_KERNEL
,
1445 if (mEp
->qh
.ptr
== NULL
)
1448 memset(mEp
->qh
.ptr
, 0, sizeof(*mEp
->qh
.ptr
));
1451 * set up shorthands for ep0 out and in endpoints,
1452 * don't add to gadget's ep_list
1460 mEp
->ep
.maxpacket
= CTRL_PAYLOAD_MAX
;
1464 list_add_tail(&mEp
->ep
.ep_list
, &ci
->gadget
.ep_list
);
1470 static void destroy_eps(struct ci13xxx
*ci
)
1474 for (i
= 0; i
< ci
->hw_ep_max
; i
++) {
1475 struct ci13xxx_ep
*mEp
= &ci
->ci13xxx_ep
[i
];
1477 dma_pool_free(ci
->qh_pool
, mEp
->qh
.ptr
, mEp
->qh
.dma
);
1482 * ci13xxx_start: register a gadget driver
1483 * @gadget: our gadget
1484 * @driver: the driver being registered
1486 * Interrupts are enabled here.
1488 static int ci13xxx_start(struct usb_gadget
*gadget
,
1489 struct usb_gadget_driver
*driver
)
1491 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
1492 unsigned long flags
;
1493 int retval
= -ENOMEM
;
1495 if (driver
->disconnect
== NULL
)
1499 ci
->ep0out
->ep
.desc
= &ctrl_endpt_out_desc
;
1500 retval
= usb_ep_enable(&ci
->ep0out
->ep
);
1504 ci
->ep0in
->ep
.desc
= &ctrl_endpt_in_desc
;
1505 retval
= usb_ep_enable(&ci
->ep0in
->ep
);
1508 spin_lock_irqsave(&ci
->lock
, flags
);
1510 ci
->driver
= driver
;
1511 pm_runtime_get_sync(&ci
->gadget
.dev
);
1512 if (ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
) {
1513 if (ci
->vbus_active
) {
1514 if (ci
->platdata
->flags
& CI13XXX_REGS_SHARED
)
1515 hw_device_reset(ci
, USBMODE_CM_DC
);
1517 pm_runtime_put_sync(&ci
->gadget
.dev
);
1522 retval
= hw_device_state(ci
, ci
->ep0out
->qh
.dma
);
1524 pm_runtime_put_sync(&ci
->gadget
.dev
);
1527 spin_unlock_irqrestore(&ci
->lock
, flags
);
1532 * ci13xxx_stop: unregister a gadget driver
1534 static int ci13xxx_stop(struct usb_gadget
*gadget
,
1535 struct usb_gadget_driver
*driver
)
1537 struct ci13xxx
*ci
= container_of(gadget
, struct ci13xxx
, gadget
);
1538 unsigned long flags
;
1540 spin_lock_irqsave(&ci
->lock
, flags
);
1542 if (!(ci
->platdata
->flags
& CI13XXX_PULLUP_ON_VBUS
) ||
1544 hw_device_state(ci
, 0);
1545 if (ci
->platdata
->notify_event
)
1546 ci
->platdata
->notify_event(ci
,
1547 CI13XXX_CONTROLLER_STOPPED_EVENT
);
1549 spin_unlock_irqrestore(&ci
->lock
, flags
);
1550 _gadget_stop_activity(&ci
->gadget
);
1551 spin_lock_irqsave(&ci
->lock
, flags
);
1552 pm_runtime_put(&ci
->gadget
.dev
);
1555 spin_unlock_irqrestore(&ci
->lock
, flags
);
1560 /******************************************************************************
1562 *****************************************************************************/
1564 * udc_irq: ci interrupt handler
1566 * This function returns IRQ_HANDLED if the IRQ has been handled
1567 * It locks access to registers
1569 static irqreturn_t
udc_irq(struct ci13xxx
*ci
)
1577 spin_lock(&ci
->lock
);
1579 if (ci
->platdata
->flags
& CI13XXX_REGS_SHARED
) {
1580 if (hw_read(ci
, OP_USBMODE
, USBMODE_CM
) !=
1582 spin_unlock(&ci
->lock
);
1586 intr
= hw_test_and_clear_intr_active(ci
);
1589 /* order defines priority - do NOT change it */
1590 if (USBi_URI
& intr
)
1591 isr_reset_handler(ci
);
1593 if (USBi_PCI
& intr
) {
1594 ci
->gadget
.speed
= hw_port_is_high_speed(ci
) ?
1595 USB_SPEED_HIGH
: USB_SPEED_FULL
;
1596 if (ci
->suspended
&& ci
->driver
->resume
) {
1597 spin_unlock(&ci
->lock
);
1598 ci
->driver
->resume(&ci
->gadget
);
1599 spin_lock(&ci
->lock
);
1605 isr_tr_complete_handler(ci
);
1607 if (USBi_SLI
& intr
) {
1608 if (ci
->gadget
.speed
!= USB_SPEED_UNKNOWN
&&
1609 ci
->driver
->suspend
) {
1611 spin_unlock(&ci
->lock
);
1612 ci
->driver
->suspend(&ci
->gadget
);
1613 spin_lock(&ci
->lock
);
1616 retval
= IRQ_HANDLED
;
1620 spin_unlock(&ci
->lock
);
1626 * udc_release: driver release function
1629 * Currently does nothing
1631 static void udc_release(struct device
*dev
)
1636 * udc_start: initialize gadget role
1637 * @ci: chipidea controller
1639 static int udc_start(struct ci13xxx
*ci
)
1641 struct device
*dev
= ci
->dev
;
1644 spin_lock_init(&ci
->lock
);
1646 ci
->gadget
.ops
= &usb_gadget_ops
;
1647 ci
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1648 ci
->gadget
.max_speed
= USB_SPEED_HIGH
;
1649 ci
->gadget
.is_otg
= 0;
1650 ci
->gadget
.name
= ci
->platdata
->name
;
1652 INIT_LIST_HEAD(&ci
->gadget
.ep_list
);
1654 dev_set_name(&ci
->gadget
.dev
, "gadget");
1655 ci
->gadget
.dev
.dma_mask
= dev
->dma_mask
;
1656 ci
->gadget
.dev
.coherent_dma_mask
= dev
->coherent_dma_mask
;
1657 ci
->gadget
.dev
.parent
= dev
;
1658 ci
->gadget
.dev
.release
= udc_release
;
1660 /* alloc resources */
1661 ci
->qh_pool
= dma_pool_create("ci13xxx_qh", dev
,
1662 sizeof(struct ci13xxx_qh
),
1663 64, CI13XXX_PAGE_SIZE
);
1664 if (ci
->qh_pool
== NULL
)
1667 ci
->td_pool
= dma_pool_create("ci13xxx_td", dev
,
1668 sizeof(struct ci13xxx_td
),
1669 64, CI13XXX_PAGE_SIZE
);
1670 if (ci
->td_pool
== NULL
) {
1675 retval
= init_eps(ci
);
1679 ci
->gadget
.ep0
= &ci
->ep0in
->ep
;
1682 ci
->transceiver
= usb_get_phy(USB_PHY_TYPE_USB2
);
1684 if (ci
->platdata
->flags
& CI13XXX_REQUIRE_TRANSCEIVER
) {
1685 if (ci
->transceiver
== NULL
) {
1691 if (!(ci
->platdata
->flags
& CI13XXX_REGS_SHARED
)) {
1692 retval
= hw_device_reset(ci
, USBMODE_CM_DC
);
1694 goto put_transceiver
;
1697 retval
= device_register(&ci
->gadget
.dev
);
1699 put_device(&ci
->gadget
.dev
);
1700 goto put_transceiver
;
1703 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1704 retval
= otg_set_peripheral(ci
->transceiver
->otg
,
1710 retval
= usb_add_gadget_udc(dev
, &ci
->gadget
);
1714 pm_runtime_no_callbacks(&ci
->gadget
.dev
);
1715 pm_runtime_enable(&ci
->gadget
.dev
);
1720 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1721 otg_set_peripheral(ci
->transceiver
->otg
, NULL
);
1723 usb_put_phy(ci
->transceiver
);
1726 dev_err(dev
, "error = %i\n", retval
);
1728 device_unregister(&ci
->gadget
.dev
);
1730 if (!IS_ERR_OR_NULL(ci
->transceiver
) && ci
->global_phy
)
1731 usb_put_phy(ci
->transceiver
);
1735 dma_pool_destroy(ci
->td_pool
);
1737 dma_pool_destroy(ci
->qh_pool
);
1742 * udc_remove: parent remove must call this to remove UDC
1744 * No interrupts active, the IRQ has been released
1746 static void udc_stop(struct ci13xxx
*ci
)
1751 usb_del_gadget_udc(&ci
->gadget
);
1755 dma_pool_destroy(ci
->td_pool
);
1756 dma_pool_destroy(ci
->qh_pool
);
1758 if (!IS_ERR_OR_NULL(ci
->transceiver
)) {
1759 otg_set_peripheral(ci
->transceiver
->otg
, NULL
);
1761 usb_put_phy(ci
->transceiver
);
1763 device_unregister(&ci
->gadget
.dev
);
1764 /* my kobject is dynamic, I swear! */
1765 memset(&ci
->gadget
, 0, sizeof(ci
->gadget
));
1769 * ci_hdrc_gadget_init - initialize device related bits
1770 * ci: the controller
1772 * This function enables the gadget role, if the device is "device capable".
1774 int ci_hdrc_gadget_init(struct ci13xxx
*ci
)
1776 struct ci_role_driver
*rdrv
;
1778 if (!hw_read(ci
, CAP_DCCPARAMS
, DCCPARAMS_DC
))
1781 rdrv
= devm_kzalloc(ci
->dev
, sizeof(struct ci_role_driver
), GFP_KERNEL
);
1785 rdrv
->start
= udc_start
;
1786 rdrv
->stop
= udc_stop
;
1787 rdrv
->irq
= udc_irq
;
1788 rdrv
->name
= "gadget";
1789 ci
->roles
[CI_ROLE_GADGET
] = rdrv
;