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/dma-mapping.h>
17 #include <linux/err.h>
18 #include <linux/init.h>
19 #include <linux/platform_device.h>
20 #include <linux/module.h>
21 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/kernel.h>
25 #include <linux/slab.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/usb/ch9.h>
28 #include <linux/usb/gadget.h>
29 #include <linux/usb/otg.h>
30 #include <linux/usb/chipidea.h>
37 /* control endpoint description */
38 static const struct usb_endpoint_descriptor
39 ctrl_endpt_out_desc = {
40 .bLength = USB_DT_ENDPOINT_SIZE,
41 .bDescriptorType = USB_DT_ENDPOINT,
43 .bEndpointAddress = USB_DIR_OUT,
44 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
45 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
48 static const struct usb_endpoint_descriptor
49 ctrl_endpt_in_desc = {
50 .bLength = USB_DT_ENDPOINT_SIZE,
51 .bDescriptorType = USB_DT_ENDPOINT,
53 .bEndpointAddress = USB_DIR_IN,
54 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
55 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
59 * hw_ep_bit: calculates the bit number
60 * @num: endpoint number
61 * @dir: endpoint direction
63 * This function returns bit number
65 static inline int hw_ep_bit(int num, int dir)
67 return num + (dir ? 16 : 0);
70 static inline int ep_to_bit(struct ci13xxx *ci, int n)
72 int fill = 16 - ci->hw_ep_max / 2;
74 if (n >= ci->hw_ep_max / 2)
81 * hw_device_state: enables/disables interrupts (execute without interruption)
82 * @dma: 0 => disable, !0 => enable and set dma engine
84 * This function returns an error code
86 static int hw_device_state(struct ci13xxx *ci, u32 dma)
89 hw_write(ci, OP_ENDPTLISTADDR, ~0, dma);
90 /* interrupt, error, port change, reset, sleep/suspend */
91 hw_write(ci, OP_USBINTR, ~0,
92 USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
94 hw_write(ci, OP_USBINTR, ~0, 0);
100 * hw_ep_flush: flush endpoint fifo (execute without interruption)
101 * @num: endpoint number
102 * @dir: endpoint direction
104 * This function returns an error code
106 static int hw_ep_flush(struct ci13xxx *ci, int num, int dir)
108 int n = hw_ep_bit(num, dir);
111 /* flush any pending transfer */
112 hw_write(ci, OP_ENDPTFLUSH, BIT(n), BIT(n));
113 while (hw_read(ci, OP_ENDPTFLUSH, BIT(n)))
115 } while (hw_read(ci, OP_ENDPTSTAT, BIT(n)));
121 * hw_ep_disable: disables endpoint (execute without interruption)
122 * @num: endpoint number
123 * @dir: endpoint direction
125 * This function returns an error code
127 static int hw_ep_disable(struct ci13xxx *ci, int num, int dir)
129 hw_ep_flush(ci, num, dir);
130 hw_write(ci, OP_ENDPTCTRL + num,
131 dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
136 * hw_ep_enable: enables endpoint (execute without interruption)
137 * @num: endpoint number
138 * @dir: endpoint direction
139 * @type: endpoint type
141 * This function returns an error code
143 static int hw_ep_enable(struct ci13xxx *ci, int num, int dir, int type)
148 mask = ENDPTCTRL_TXT; /* type */
149 data = type << ffs_nr(mask);
151 mask |= ENDPTCTRL_TXS; /* unstall */
152 mask |= ENDPTCTRL_TXR; /* reset data toggle */
153 data |= ENDPTCTRL_TXR;
154 mask |= ENDPTCTRL_TXE; /* enable */
155 data |= ENDPTCTRL_TXE;
157 mask = ENDPTCTRL_RXT; /* type */
158 data = type << ffs_nr(mask);
160 mask |= ENDPTCTRL_RXS; /* unstall */
161 mask |= ENDPTCTRL_RXR; /* reset data toggle */
162 data |= ENDPTCTRL_RXR;
163 mask |= ENDPTCTRL_RXE; /* enable */
164 data |= ENDPTCTRL_RXE;
166 hw_write(ci, OP_ENDPTCTRL + num, mask, data);
171 * hw_ep_get_halt: return endpoint halt status
172 * @num: endpoint number
173 * @dir: endpoint direction
175 * This function returns 1 if endpoint halted
177 static int hw_ep_get_halt(struct ci13xxx *ci, int num, int dir)
179 u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
181 return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0;
185 * hw_test_and_clear_setup_status: test & clear setup status (execute without
187 * @n: endpoint number
189 * This function returns setup status
191 static int hw_test_and_clear_setup_status(struct ci13xxx *ci, int n)
193 n = ep_to_bit(ci, n);
194 return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n));
198 * hw_ep_prime: primes endpoint (execute without interruption)
199 * @num: endpoint number
200 * @dir: endpoint direction
201 * @is_ctrl: true if control endpoint
203 * This function returns an error code
205 static int hw_ep_prime(struct ci13xxx *ci, int num, int dir, int is_ctrl)
207 int n = hw_ep_bit(num, dir);
209 if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
212 hw_write(ci, OP_ENDPTPRIME, BIT(n), BIT(n));
214 while (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
216 if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
219 /* status shoult be tested according with manual but it doesn't work */
224 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
225 * without interruption)
226 * @num: endpoint number
227 * @dir: endpoint direction
228 * @value: true => stall, false => unstall
230 * This function returns an error code
232 static int hw_ep_set_halt(struct ci13xxx *ci, int num, int dir, int value)
234 if (value != 0 && value != 1)
238 enum ci13xxx_regs reg = OP_ENDPTCTRL + num;
239 u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
240 u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
242 /* data toggle - reserved for EP0 but it's in ESS */
243 hw_write(ci, reg, mask_xs|mask_xr,
244 value ? mask_xs : mask_xr);
245 } while (value != hw_ep_get_halt(ci, num, dir));
251 * hw_is_port_high_speed: test if port is high speed
253 * This function returns true if high speed port
255 static int hw_port_is_high_speed(struct ci13xxx *ci)
257 return ci->hw_bank.lpm ? hw_read(ci, OP_DEVLC, DEVLC_PSPD) :
258 hw_read(ci, OP_PORTSC, PORTSC_HSP);
262 * hw_read_intr_enable: returns interrupt enable register
264 * This function returns register data
266 static u32 hw_read_intr_enable(struct ci13xxx *ci)
268 return hw_read(ci, OP_USBINTR, ~0);
272 * hw_read_intr_status: returns interrupt status register
274 * This function returns register data
276 static u32 hw_read_intr_status(struct ci13xxx *ci)
278 return hw_read(ci, OP_USBSTS, ~0);
282 * hw_test_and_clear_complete: test & clear complete status (execute without
284 * @n: endpoint number
286 * This function returns complete status
288 static int hw_test_and_clear_complete(struct ci13xxx *ci, int n)
290 n = ep_to_bit(ci, n);
291 return hw_test_and_clear(ci, OP_ENDPTCOMPLETE, BIT(n));
295 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
296 * without interruption)
298 * This function returns active interrutps
300 static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci)
302 u32 reg = hw_read_intr_status(ci) & hw_read_intr_enable(ci);
304 hw_write(ci, OP_USBSTS, ~0, reg);
308 static void hw_enable_vbus_intr(struct ci13xxx *ci)
310 hw_write(ci, OP_OTGSC, OTGSC_AVVIS, OTGSC_AVVIS);
311 hw_write(ci, OP_OTGSC, OTGSC_AVVIE, OTGSC_AVVIE);
312 queue_work(ci->wq, &ci->vbus_work);
315 static void hw_disable_vbus_intr(struct ci13xxx *ci)
317 hw_write(ci, OP_OTGSC, OTGSC_AVVIE, 0);
321 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
324 * This function returns guard value
326 static int hw_test_and_clear_setup_guard(struct ci13xxx *ci)
328 return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, 0);
332 * hw_test_and_set_setup_guard: test & set setup guard (execute without
335 * This function returns guard value
337 static int hw_test_and_set_setup_guard(struct ci13xxx *ci)
339 return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
343 * hw_usb_set_address: configures USB address (execute without interruption)
344 * @value: new USB address
346 * This function explicitly sets the address, without the "USBADRA" (advance)
347 * feature, which is not supported by older versions of the controller.
349 static void hw_usb_set_address(struct ci13xxx *ci, u8 value)
351 hw_write(ci, OP_DEVICEADDR, DEVICEADDR_USBADR,
352 value << ffs_nr(DEVICEADDR_USBADR));
356 * hw_usb_reset: restart device after a bus reset (execute without
359 * This function returns an error code
361 static int hw_usb_reset(struct ci13xxx *ci)
363 hw_usb_set_address(ci, 0);
365 /* ESS flushes only at end?!? */
366 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
368 /* clear setup token semaphores */
369 hw_write(ci, OP_ENDPTSETUPSTAT, 0, 0);
371 /* clear complete status */
372 hw_write(ci, OP_ENDPTCOMPLETE, 0, 0);
374 /* wait until all bits cleared */
375 while (hw_read(ci, OP_ENDPTPRIME, ~0))
376 udelay(10); /* not RTOS friendly */
378 /* reset all endpoints ? */
380 /* reset internal status and wait for further instructions
381 no need to verify the port reset status (ESS does it) */
386 static void vbus_work(struct work_struct *work)
388 struct ci13xxx *ci = container_of(work, struct ci13xxx, vbus_work);
390 if (hw_read(ci, OP_OTGSC, OTGSC_AVV))
391 usb_gadget_vbus_connect(&ci->gadget);
393 usb_gadget_vbus_disconnect(&ci->gadget);
396 /******************************************************************************
398 *****************************************************************************/
400 * _usb_addr: calculates endpoint address from direction & number
403 static inline u8 _usb_addr(struct ci13xxx_ep *ep)
405 return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
409 * _hardware_queue: configures a request at hardware level
413 * This function returns an error code
415 static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
417 struct ci13xxx *ci = mEp->ci;
420 unsigned length = mReq->req.length;
422 /* don't queue twice */
423 if (mReq->req.status == -EALREADY)
426 mReq->req.status = -EALREADY;
428 if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
429 mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
431 if (mReq->zptr == NULL)
434 memset(mReq->zptr, 0, sizeof(*mReq->zptr));
435 mReq->zptr->next = TD_TERMINATE;
436 mReq->zptr->token = TD_STATUS_ACTIVE;
437 if (!mReq->req.no_interrupt)
438 mReq->zptr->token |= TD_IOC;
440 ret = usb_gadget_map_request(&ci->gadget, &mReq->req, mEp->dir);
446 * TODO - handle requests which spawns into several TDs
448 memset(mReq->ptr, 0, sizeof(*mReq->ptr));
449 mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES);
450 mReq->ptr->token &= TD_TOTAL_BYTES;
451 mReq->ptr->token |= TD_STATUS_ACTIVE;
453 mReq->ptr->next = mReq->zdma;
455 mReq->ptr->next = TD_TERMINATE;
456 if (!mReq->req.no_interrupt)
457 mReq->ptr->token |= TD_IOC;
459 mReq->ptr->page[0] = mReq->req.dma;
460 for (i = 1; i < 5; i++)
462 (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
464 if (!list_empty(&mEp->qh.queue)) {
465 struct ci13xxx_req *mReqPrev;
466 int n = hw_ep_bit(mEp->num, mEp->dir);
469 mReqPrev = list_entry(mEp->qh.queue.prev,
470 struct ci13xxx_req, queue);
472 mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
474 mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
476 if (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
479 hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
480 tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n));
481 } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW));
482 hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0);
487 /* QH configuration */
488 mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
489 mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
490 mEp->qh.ptr->cap |= QH_ZLT;
492 wmb(); /* synchronize before ep prime */
494 ret = hw_ep_prime(ci, mEp->num, mEp->dir,
495 mEp->type == USB_ENDPOINT_XFER_CONTROL);
501 * _hardware_dequeue: handles a request at hardware level
505 * This function returns an error code
507 static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
509 if (mReq->req.status != -EALREADY)
512 if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
516 if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
518 dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
522 mReq->req.status = 0;
524 usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir);
526 mReq->req.status = mReq->ptr->token & TD_STATUS;
527 if ((TD_STATUS_HALTED & mReq->req.status) != 0)
528 mReq->req.status = -1;
529 else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
530 mReq->req.status = -1;
531 else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
532 mReq->req.status = -1;
534 mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
535 mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
536 mReq->req.actual = mReq->req.length - mReq->req.actual;
537 mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
539 return mReq->req.actual;
543 * _ep_nuke: dequeues all endpoint requests
546 * This function returns an error code
547 * Caller must hold lock
549 static int _ep_nuke(struct ci13xxx_ep *mEp)
550 __releases(mEp->lock)
551 __acquires(mEp->lock)
556 hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
558 while (!list_empty(&mEp->qh.queue)) {
560 /* pop oldest request */
561 struct ci13xxx_req *mReq = \
562 list_entry(mEp->qh.queue.next,
563 struct ci13xxx_req, queue);
564 list_del_init(&mReq->queue);
565 mReq->req.status = -ESHUTDOWN;
567 if (mReq->req.complete != NULL) {
568 spin_unlock(mEp->lock);
569 mReq->req.complete(&mEp->ep, &mReq->req);
570 spin_lock(mEp->lock);
577 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
580 * This function returns an error code
582 static int _gadget_stop_activity(struct usb_gadget *gadget)
585 struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
588 spin_lock_irqsave(&ci->lock, flags);
589 ci->gadget.speed = USB_SPEED_UNKNOWN;
590 ci->remote_wakeup = 0;
592 spin_unlock_irqrestore(&ci->lock, flags);
594 /* flush all endpoints */
595 gadget_for_each_ep(ep, gadget) {
596 usb_ep_fifo_flush(ep);
598 usb_ep_fifo_flush(&ci->ep0out->ep);
599 usb_ep_fifo_flush(&ci->ep0in->ep);
602 ci->driver->disconnect(gadget);
604 /* make sure to disable all endpoints */
605 gadget_for_each_ep(ep, gadget) {
609 if (ci->status != NULL) {
610 usb_ep_free_request(&ci->ep0in->ep, ci->status);
617 /******************************************************************************
619 *****************************************************************************/
621 * isr_reset_handler: USB reset interrupt handler
624 * This function resets USB engine after a bus reset occurred
626 static void isr_reset_handler(struct ci13xxx *ci)
632 dbg_event(0xFF, "BUS RST", 0);
634 spin_unlock(&ci->lock);
635 retval = _gadget_stop_activity(&ci->gadget);
639 retval = hw_usb_reset(ci);
643 ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC);
644 if (ci->status == NULL)
648 spin_lock(&ci->lock);
651 dev_err(ci->dev, "error: %i\n", retval);
655 * isr_get_status_complete: get_status request complete function
657 * @req: request handled
659 * Caller must release lock
661 static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
663 if (ep == NULL || req == NULL)
667 usb_ep_free_request(ep, req);
671 * isr_get_status_response: get_status request response
673 * @setup: setup request packet
675 * This function returns an error code
677 static int isr_get_status_response(struct ci13xxx *ci,
678 struct usb_ctrlrequest *setup)
679 __releases(mEp->lock)
680 __acquires(mEp->lock)
682 struct ci13xxx_ep *mEp = ci->ep0in;
683 struct usb_request *req = NULL;
684 gfp_t gfp_flags = GFP_ATOMIC;
685 int dir, num, retval;
687 if (mEp == NULL || setup == NULL)
690 spin_unlock(mEp->lock);
691 req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
692 spin_lock(mEp->lock);
696 req->complete = isr_get_status_complete;
698 req->buf = kzalloc(req->length, gfp_flags);
699 if (req->buf == NULL) {
704 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
705 /* Assume that device is bus powered for now. */
706 *(u16 *)req->buf = ci->remote_wakeup << 1;
708 } else if ((setup->bRequestType & USB_RECIP_MASK) \
709 == USB_RECIP_ENDPOINT) {
710 dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
712 num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
713 *(u16 *)req->buf = hw_ep_get_halt(ci, num, dir);
715 /* else do nothing; reserved for future use */
717 spin_unlock(mEp->lock);
718 retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
719 spin_lock(mEp->lock);
728 spin_unlock(mEp->lock);
729 usb_ep_free_request(&mEp->ep, req);
730 spin_lock(mEp->lock);
735 * isr_setup_status_complete: setup_status request complete function
737 * @req: request handled
739 * Caller must release lock. Put the port in test mode if test mode
740 * feature is selected.
743 isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
745 struct ci13xxx *ci = req->context;
749 hw_usb_set_address(ci, ci->address);
753 spin_lock_irqsave(&ci->lock, flags);
755 hw_port_test_set(ci, ci->test_mode);
756 spin_unlock_irqrestore(&ci->lock, flags);
760 * isr_setup_status_phase: queues the status phase of a setup transation
763 * This function returns an error code
765 static int isr_setup_status_phase(struct ci13xxx *ci)
766 __releases(mEp->lock)
767 __acquires(mEp->lock)
770 struct ci13xxx_ep *mEp;
772 mEp = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in;
773 ci->status->context = ci;
774 ci->status->complete = isr_setup_status_complete;
776 spin_unlock(mEp->lock);
777 retval = usb_ep_queue(&mEp->ep, ci->status, GFP_ATOMIC);
778 spin_lock(mEp->lock);
784 * isr_tr_complete_low: transaction complete low level handler
787 * This function returns an error code
788 * Caller must hold lock
790 static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
791 __releases(mEp->lock)
792 __acquires(mEp->lock)
794 struct ci13xxx_req *mReq, *mReqTemp;
795 struct ci13xxx_ep *mEpTemp = mEp;
798 list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
800 retval = _hardware_dequeue(mEp, mReq);
803 list_del_init(&mReq->queue);
804 dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
805 if (mReq->req.complete != NULL) {
806 spin_unlock(mEp->lock);
807 if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
809 mEpTemp = mEp->ci->ep0in;
810 mReq->req.complete(&mEpTemp->ep, &mReq->req);
811 spin_lock(mEp->lock);
815 if (retval == -EBUSY)
818 dbg_event(_usb_addr(mEp), "DONE", retval);
824 * isr_tr_complete_handler: transaction complete interrupt handler
825 * @ci: UDC descriptor
827 * This function handles traffic events
829 static void isr_tr_complete_handler(struct ci13xxx *ci)
836 for (i = 0; i < ci->hw_ep_max; i++) {
837 struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
838 int type, num, dir, err = -EINVAL;
839 struct usb_ctrlrequest req;
841 if (mEp->ep.desc == NULL)
842 continue; /* not configured */
844 if (hw_test_and_clear_complete(ci, i)) {
845 err = isr_tr_complete_low(mEp);
846 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
847 if (err > 0) /* needs status phase */
848 err = isr_setup_status_phase(ci);
850 dbg_event(_usb_addr(mEp),
852 spin_unlock(&ci->lock);
853 if (usb_ep_set_halt(&mEp->ep))
855 "error: ep_set_halt\n");
856 spin_lock(&ci->lock);
861 if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
862 !hw_test_and_clear_setup_status(ci, i))
866 dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i);
871 * Flush data and handshake transactions of previous
874 _ep_nuke(ci->ep0out);
877 /* read_setup_packet */
879 hw_test_and_set_setup_guard(ci);
880 memcpy(&req, &mEp->qh.ptr->setup, sizeof(req));
881 } while (!hw_test_and_clear_setup_guard(ci));
883 type = req.bRequestType;
885 ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
887 dbg_setup(_usb_addr(mEp), &req);
889 switch (req.bRequest) {
890 case USB_REQ_CLEAR_FEATURE:
891 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
892 le16_to_cpu(req.wValue) ==
894 if (req.wLength != 0)
896 num = le16_to_cpu(req.wIndex);
897 dir = num & USB_ENDPOINT_DIR_MASK;
898 num &= USB_ENDPOINT_NUMBER_MASK;
900 num += ci->hw_ep_max/2;
901 if (!ci->ci13xxx_ep[num].wedge) {
902 spin_unlock(&ci->lock);
903 err = usb_ep_clear_halt(
904 &ci->ci13xxx_ep[num].ep);
905 spin_lock(&ci->lock);
909 err = isr_setup_status_phase(ci);
910 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
911 le16_to_cpu(req.wValue) ==
912 USB_DEVICE_REMOTE_WAKEUP) {
913 if (req.wLength != 0)
915 ci->remote_wakeup = 0;
916 err = isr_setup_status_phase(ci);
921 case USB_REQ_GET_STATUS:
922 if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
923 type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
924 type != (USB_DIR_IN|USB_RECIP_INTERFACE))
926 if (le16_to_cpu(req.wLength) != 2 ||
927 le16_to_cpu(req.wValue) != 0)
929 err = isr_get_status_response(ci, &req);
931 case USB_REQ_SET_ADDRESS:
932 if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
934 if (le16_to_cpu(req.wLength) != 0 ||
935 le16_to_cpu(req.wIndex) != 0)
937 ci->address = (u8)le16_to_cpu(req.wValue);
939 err = isr_setup_status_phase(ci);
941 case USB_REQ_SET_FEATURE:
942 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
943 le16_to_cpu(req.wValue) ==
945 if (req.wLength != 0)
947 num = le16_to_cpu(req.wIndex);
948 dir = num & USB_ENDPOINT_DIR_MASK;
949 num &= USB_ENDPOINT_NUMBER_MASK;
951 num += ci->hw_ep_max/2;
953 spin_unlock(&ci->lock);
954 err = usb_ep_set_halt(&ci->ci13xxx_ep[num].ep);
955 spin_lock(&ci->lock);
957 isr_setup_status_phase(ci);
958 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
959 if (req.wLength != 0)
961 switch (le16_to_cpu(req.wValue)) {
962 case USB_DEVICE_REMOTE_WAKEUP:
963 ci->remote_wakeup = 1;
964 err = isr_setup_status_phase(ci);
966 case USB_DEVICE_TEST_MODE:
967 tmode = le16_to_cpu(req.wIndex) >> 8;
974 ci->test_mode = tmode;
975 err = isr_setup_status_phase(
990 if (req.wLength == 0) /* no data phase */
993 spin_unlock(&ci->lock);
994 err = ci->driver->setup(&ci->gadget, &req);
995 spin_lock(&ci->lock);
1000 dbg_event(_usb_addr(mEp), "ERROR", err);
1002 spin_unlock(&ci->lock);
1003 if (usb_ep_set_halt(&mEp->ep))
1004 dev_err(ci->dev, "error: ep_set_halt\n");
1005 spin_lock(&ci->lock);
1010 /******************************************************************************
1012 *****************************************************************************/
1014 * ep_enable: configure endpoint, making it usable
1016 * Check usb_ep_enable() at "usb_gadget.h" for details
1018 static int ep_enable(struct usb_ep *ep,
1019 const struct usb_endpoint_descriptor *desc)
1021 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1023 unsigned long flags;
1025 if (ep == NULL || desc == NULL)
1028 spin_lock_irqsave(mEp->lock, flags);
1030 /* only internal SW should enable ctrl endpts */
1032 mEp->ep.desc = desc;
1034 if (!list_empty(&mEp->qh.queue))
1035 dev_warn(mEp->ci->dev, "enabling a non-empty endpoint!\n");
1037 mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
1038 mEp->num = usb_endpoint_num(desc);
1039 mEp->type = usb_endpoint_type(desc);
1041 mEp->ep.maxpacket = usb_endpoint_maxp(desc);
1043 dbg_event(_usb_addr(mEp), "ENABLE", 0);
1045 mEp->qh.ptr->cap = 0;
1047 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1048 mEp->qh.ptr->cap |= QH_IOS;
1049 else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
1050 mEp->qh.ptr->cap &= ~QH_MULT;
1052 mEp->qh.ptr->cap &= ~QH_ZLT;
1055 (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
1056 mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */
1059 * Enable endpoints in the HW other than ep0 as ep0
1063 retval |= hw_ep_enable(mEp->ci, mEp->num, mEp->dir, mEp->type);
1065 spin_unlock_irqrestore(mEp->lock, flags);
1070 * ep_disable: endpoint is no longer usable
1072 * Check usb_ep_disable() at "usb_gadget.h" for details
1074 static int ep_disable(struct usb_ep *ep)
1076 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1077 int direction, retval = 0;
1078 unsigned long flags;
1082 else if (mEp->ep.desc == NULL)
1085 spin_lock_irqsave(mEp->lock, flags);
1087 /* only internal SW should disable ctrl endpts */
1089 direction = mEp->dir;
1091 dbg_event(_usb_addr(mEp), "DISABLE", 0);
1093 retval |= _ep_nuke(mEp);
1094 retval |= hw_ep_disable(mEp->ci, mEp->num, mEp->dir);
1096 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1097 mEp->dir = (mEp->dir == TX) ? RX : TX;
1099 } while (mEp->dir != direction);
1101 mEp->ep.desc = NULL;
1103 spin_unlock_irqrestore(mEp->lock, flags);
1108 * ep_alloc_request: allocate a request object to use with this endpoint
1110 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
1112 static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
1114 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1115 struct ci13xxx_req *mReq = NULL;
1120 mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
1122 INIT_LIST_HEAD(&mReq->queue);
1124 mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
1126 if (mReq->ptr == NULL) {
1132 dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
1134 return (mReq == NULL) ? NULL : &mReq->req;
1138 * ep_free_request: frees a request object
1140 * Check usb_ep_free_request() at "usb_gadget.h" for details
1142 static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
1144 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1145 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
1146 unsigned long flags;
1148 if (ep == NULL || req == NULL) {
1150 } else if (!list_empty(&mReq->queue)) {
1151 dev_err(mEp->ci->dev, "freeing queued request\n");
1155 spin_lock_irqsave(mEp->lock, flags);
1158 dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
1161 dbg_event(_usb_addr(mEp), "FREE", 0);
1163 spin_unlock_irqrestore(mEp->lock, flags);
1167 * ep_queue: queues (submits) an I/O request to an endpoint
1169 * Check usb_ep_queue()* at usb_gadget.h" for details
1171 static int ep_queue(struct usb_ep *ep, struct usb_request *req,
1172 gfp_t __maybe_unused gfp_flags)
1174 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1175 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
1176 struct ci13xxx *ci = mEp->ci;
1178 unsigned long flags;
1180 if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
1183 spin_lock_irqsave(mEp->lock, flags);
1185 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
1187 mEp = (ci->ep0_dir == RX) ?
1188 ci->ep0out : ci->ep0in;
1189 if (!list_empty(&mEp->qh.queue)) {
1191 retval = -EOVERFLOW;
1192 dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n",
1197 /* first nuke then test link, e.g. previous status has not sent */
1198 if (!list_empty(&mReq->queue)) {
1200 dev_err(mEp->ci->dev, "request already in queue\n");
1204 if (req->length > 4 * CI13XXX_PAGE_SIZE) {
1205 req->length = 4 * CI13XXX_PAGE_SIZE;
1207 dev_warn(mEp->ci->dev, "request length truncated\n");
1210 dbg_queue(_usb_addr(mEp), req, retval);
1213 mReq->req.status = -EINPROGRESS;
1214 mReq->req.actual = 0;
1216 retval = _hardware_enqueue(mEp, mReq);
1218 if (retval == -EALREADY) {
1219 dbg_event(_usb_addr(mEp), "QUEUE", retval);
1223 list_add_tail(&mReq->queue, &mEp->qh.queue);
1226 spin_unlock_irqrestore(mEp->lock, flags);
1231 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
1233 * Check usb_ep_dequeue() at "usb_gadget.h" for details
1235 static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
1237 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1238 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
1239 unsigned long flags;
1241 if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
1242 mEp->ep.desc == NULL || list_empty(&mReq->queue) ||
1243 list_empty(&mEp->qh.queue))
1246 spin_lock_irqsave(mEp->lock, flags);
1248 dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
1250 hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
1253 list_del_init(&mReq->queue);
1255 usb_gadget_unmap_request(&mEp->ci->gadget, req, mEp->dir);
1257 req->status = -ECONNRESET;
1259 if (mReq->req.complete != NULL) {
1260 spin_unlock(mEp->lock);
1261 mReq->req.complete(&mEp->ep, &mReq->req);
1262 spin_lock(mEp->lock);
1265 spin_unlock_irqrestore(mEp->lock, flags);
1270 * ep_set_halt: sets the endpoint halt feature
1272 * Check usb_ep_set_halt() at "usb_gadget.h" for details
1274 static int ep_set_halt(struct usb_ep *ep, int value)
1276 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1277 int direction, retval = 0;
1278 unsigned long flags;
1280 if (ep == NULL || mEp->ep.desc == NULL)
1283 spin_lock_irqsave(mEp->lock, flags);
1286 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
1287 if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
1288 !list_empty(&mEp->qh.queue)) {
1289 spin_unlock_irqrestore(mEp->lock, flags);
1294 direction = mEp->dir;
1296 dbg_event(_usb_addr(mEp), "HALT", value);
1297 retval |= hw_ep_set_halt(mEp->ci, mEp->num, mEp->dir, value);
1302 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1303 mEp->dir = (mEp->dir == TX) ? RX : TX;
1305 } while (mEp->dir != direction);
1307 spin_unlock_irqrestore(mEp->lock, flags);
1312 * ep_set_wedge: sets the halt feature and ignores clear requests
1314 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
1316 static int ep_set_wedge(struct usb_ep *ep)
1318 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1319 unsigned long flags;
1321 if (ep == NULL || mEp->ep.desc == NULL)
1324 spin_lock_irqsave(mEp->lock, flags);
1326 dbg_event(_usb_addr(mEp), "WEDGE", 0);
1329 spin_unlock_irqrestore(mEp->lock, flags);
1331 return usb_ep_set_halt(ep);
1335 * ep_fifo_flush: flushes contents of a fifo
1337 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
1339 static void ep_fifo_flush(struct usb_ep *ep)
1341 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1342 unsigned long flags;
1345 dev_err(mEp->ci->dev, "%02X: -EINVAL\n", _usb_addr(mEp));
1349 spin_lock_irqsave(mEp->lock, flags);
1351 dbg_event(_usb_addr(mEp), "FFLUSH", 0);
1352 hw_ep_flush(mEp->ci, mEp->num, mEp->dir);
1354 spin_unlock_irqrestore(mEp->lock, flags);
1358 * Endpoint-specific part of the API to the USB controller hardware
1359 * Check "usb_gadget.h" for details
1361 static const struct usb_ep_ops usb_ep_ops = {
1362 .enable = ep_enable,
1363 .disable = ep_disable,
1364 .alloc_request = ep_alloc_request,
1365 .free_request = ep_free_request,
1367 .dequeue = ep_dequeue,
1368 .set_halt = ep_set_halt,
1369 .set_wedge = ep_set_wedge,
1370 .fifo_flush = ep_fifo_flush,
1373 /******************************************************************************
1375 *****************************************************************************/
1376 static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
1378 struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
1379 unsigned long flags;
1380 int gadget_ready = 0;
1382 if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS))
1385 spin_lock_irqsave(&ci->lock, flags);
1386 ci->vbus_active = is_active;
1389 spin_unlock_irqrestore(&ci->lock, flags);
1393 pm_runtime_get_sync(&_gadget->dev);
1394 hw_device_reset(ci, USBMODE_CM_DC);
1395 hw_enable_vbus_intr(ci);
1396 hw_device_state(ci, ci->ep0out->qh.dma);
1398 hw_device_state(ci, 0);
1399 if (ci->platdata->notify_event)
1400 ci->platdata->notify_event(ci,
1401 CI13XXX_CONTROLLER_STOPPED_EVENT);
1402 _gadget_stop_activity(&ci->gadget);
1403 pm_runtime_put_sync(&_gadget->dev);
1410 static int ci13xxx_wakeup(struct usb_gadget *_gadget)
1412 struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
1413 unsigned long flags;
1416 spin_lock_irqsave(&ci->lock, flags);
1417 if (!ci->remote_wakeup) {
1421 if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) {
1425 hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR);
1427 spin_unlock_irqrestore(&ci->lock, flags);
1431 static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
1433 struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
1435 if (ci->transceiver)
1436 return usb_phy_set_power(ci->transceiver, mA);
1440 /* Change Data+ pullup status
1441 * this func is used by usb_gadget_connect/disconnet
1443 static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on)
1445 struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
1448 hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
1450 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
1455 static int ci13xxx_start(struct usb_gadget *gadget,
1456 struct usb_gadget_driver *driver);
1457 static int ci13xxx_stop(struct usb_gadget *gadget,
1458 struct usb_gadget_driver *driver);
1460 * Device operations part of the API to the USB controller hardware,
1461 * which don't involve endpoints (or i/o)
1462 * Check "usb_gadget.h" for details
1464 static const struct usb_gadget_ops usb_gadget_ops = {
1465 .vbus_session = ci13xxx_vbus_session,
1466 .wakeup = ci13xxx_wakeup,
1467 .pullup = ci13xxx_pullup,
1468 .vbus_draw = ci13xxx_vbus_draw,
1469 .udc_start = ci13xxx_start,
1470 .udc_stop = ci13xxx_stop,
1473 static int init_eps(struct ci13xxx *ci)
1475 int retval = 0, i, j;
1477 for (i = 0; i < ci->hw_ep_max/2; i++)
1478 for (j = RX; j <= TX; j++) {
1479 int k = i + j * ci->hw_ep_max/2;
1480 struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[k];
1482 scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i,
1483 (j == TX) ? "in" : "out");
1486 mEp->lock = &ci->lock;
1487 mEp->td_pool = ci->td_pool;
1489 mEp->ep.name = mEp->name;
1490 mEp->ep.ops = &usb_ep_ops;
1492 * for ep0: maxP defined in desc, for other
1493 * eps, maxP is set by epautoconfig() called
1496 mEp->ep.maxpacket = (unsigned short)~0;
1498 INIT_LIST_HEAD(&mEp->qh.queue);
1499 mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL,
1501 if (mEp->qh.ptr == NULL)
1504 memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr));
1507 * set up shorthands for ep0 out and in endpoints,
1508 * don't add to gadget's ep_list
1516 mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
1520 list_add_tail(&mEp->ep.ep_list, &ci->gadget.ep_list);
1526 static void destroy_eps(struct ci13xxx *ci)
1530 for (i = 0; i < ci->hw_ep_max; i++) {
1531 struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
1533 dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
1538 * ci13xxx_start: register a gadget driver
1539 * @gadget: our gadget
1540 * @driver: the driver being registered
1542 * Interrupts are enabled here.
1544 static int ci13xxx_start(struct usb_gadget *gadget,
1545 struct usb_gadget_driver *driver)
1547 struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
1548 unsigned long flags;
1549 int retval = -ENOMEM;
1551 if (driver->disconnect == NULL)
1555 ci->ep0out->ep.desc = &ctrl_endpt_out_desc;
1556 retval = usb_ep_enable(&ci->ep0out->ep);
1560 ci->ep0in->ep.desc = &ctrl_endpt_in_desc;
1561 retval = usb_ep_enable(&ci->ep0in->ep);
1564 spin_lock_irqsave(&ci->lock, flags);
1566 ci->driver = driver;
1567 pm_runtime_get_sync(&ci->gadget.dev);
1568 if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) {
1569 if (ci->vbus_active) {
1570 if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
1571 hw_device_reset(ci, USBMODE_CM_DC);
1572 hw_enable_vbus_intr(ci);
1575 pm_runtime_put_sync(&ci->gadget.dev);
1580 retval = hw_device_state(ci, ci->ep0out->qh.dma);
1582 pm_runtime_put_sync(&ci->gadget.dev);
1585 spin_unlock_irqrestore(&ci->lock, flags);
1590 * ci13xxx_stop: unregister a gadget driver
1592 static int ci13xxx_stop(struct usb_gadget *gadget,
1593 struct usb_gadget_driver *driver)
1595 struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget);
1596 unsigned long flags;
1598 spin_lock_irqsave(&ci->lock, flags);
1600 if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) ||
1602 hw_device_state(ci, 0);
1603 if (ci->platdata->notify_event)
1604 ci->platdata->notify_event(ci,
1605 CI13XXX_CONTROLLER_STOPPED_EVENT);
1607 spin_unlock_irqrestore(&ci->lock, flags);
1608 _gadget_stop_activity(&ci->gadget);
1609 spin_lock_irqsave(&ci->lock, flags);
1610 pm_runtime_put(&ci->gadget.dev);
1613 spin_unlock_irqrestore(&ci->lock, flags);
1618 /******************************************************************************
1620 *****************************************************************************/
1622 * udc_irq: ci interrupt handler
1624 * This function returns IRQ_HANDLED if the IRQ has been handled
1625 * It locks access to registers
1627 static irqreturn_t udc_irq(struct ci13xxx *ci)
1635 spin_lock(&ci->lock);
1637 if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
1638 if (hw_read(ci, OP_USBMODE, USBMODE_CM) !=
1640 spin_unlock(&ci->lock);
1644 intr = hw_test_and_clear_intr_active(ci);
1645 dbg_interrupt(intr);
1648 /* order defines priority - do NOT change it */
1649 if (USBi_URI & intr)
1650 isr_reset_handler(ci);
1652 if (USBi_PCI & intr) {
1653 ci->gadget.speed = hw_port_is_high_speed(ci) ?
1654 USB_SPEED_HIGH : USB_SPEED_FULL;
1655 if (ci->suspended && ci->driver->resume) {
1656 spin_unlock(&ci->lock);
1657 ci->driver->resume(&ci->gadget);
1658 spin_lock(&ci->lock);
1664 isr_tr_complete_handler(ci);
1666 if (USBi_SLI & intr) {
1667 if (ci->gadget.speed != USB_SPEED_UNKNOWN &&
1668 ci->driver->suspend) {
1670 spin_unlock(&ci->lock);
1671 ci->driver->suspend(&ci->gadget);
1672 spin_lock(&ci->lock);
1675 retval = IRQ_HANDLED;
1680 intr = hw_read(ci, OP_OTGSC, ~0);
1681 hw_write(ci, OP_OTGSC, ~0, intr);
1683 if (intr & (OTGSC_AVVIE & OTGSC_AVVIS))
1684 queue_work(ci->wq, &ci->vbus_work);
1686 spin_unlock(&ci->lock);
1692 * udc_release: driver release function
1695 * Currently does nothing
1697 static void udc_release(struct device *dev)
1702 * udc_start: initialize gadget role
1703 * @ci: chipidea controller
1705 static int udc_start(struct ci13xxx *ci)
1707 struct device *dev = ci->dev;
1710 spin_lock_init(&ci->lock);
1712 ci->gadget.ops = &usb_gadget_ops;
1713 ci->gadget.speed = USB_SPEED_UNKNOWN;
1714 ci->gadget.max_speed = USB_SPEED_HIGH;
1715 ci->gadget.is_otg = 0;
1716 ci->gadget.name = ci->platdata->name;
1718 INIT_LIST_HEAD(&ci->gadget.ep_list);
1720 dev_set_name(&ci->gadget.dev, "gadget");
1721 ci->gadget.dev.dma_mask = dev->dma_mask;
1722 ci->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask;
1723 ci->gadget.dev.parent = dev;
1724 ci->gadget.dev.release = udc_release;
1726 /* alloc resources */
1727 ci->qh_pool = dma_pool_create("ci13xxx_qh", dev,
1728 sizeof(struct ci13xxx_qh),
1729 64, CI13XXX_PAGE_SIZE);
1730 if (ci->qh_pool == NULL)
1733 ci->td_pool = dma_pool_create("ci13xxx_td", dev,
1734 sizeof(struct ci13xxx_td),
1735 64, CI13XXX_PAGE_SIZE);
1736 if (ci->td_pool == NULL) {
1741 retval = init_eps(ci);
1745 ci->gadget.ep0 = &ci->ep0in->ep;
1748 ci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
1750 if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
1751 if (ci->transceiver == NULL) {
1757 if (!(ci->platdata->flags & CI13XXX_REGS_SHARED)) {
1758 retval = hw_device_reset(ci, USBMODE_CM_DC);
1760 goto put_transceiver;
1761 hw_enable_vbus_intr(ci);
1764 retval = device_register(&ci->gadget.dev);
1766 put_device(&ci->gadget.dev);
1767 goto put_transceiver;
1770 retval = dbg_create_files(&ci->gadget.dev);
1774 if (!IS_ERR_OR_NULL(ci->transceiver)) {
1775 retval = otg_set_peripheral(ci->transceiver->otg,
1781 retval = usb_add_gadget_udc(dev, &ci->gadget);
1785 pm_runtime_no_callbacks(&ci->gadget.dev);
1786 pm_runtime_enable(&ci->gadget.dev);
1791 if (!IS_ERR_OR_NULL(ci->transceiver)) {
1792 otg_set_peripheral(ci->transceiver->otg, NULL);
1794 usb_put_phy(ci->transceiver);
1797 dev_err(dev, "error = %i\n", retval);
1799 dbg_remove_files(&ci->gadget.dev);
1801 device_unregister(&ci->gadget.dev);
1803 if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy)
1804 usb_put_phy(ci->transceiver);
1808 dma_pool_destroy(ci->td_pool);
1810 dma_pool_destroy(ci->qh_pool);
1815 * udc_remove: parent remove must call this to remove UDC
1817 * No interrupts active, the IRQ has been released
1819 static void udc_stop(struct ci13xxx *ci)
1824 hw_disable_vbus_intr(ci);
1825 cancel_work_sync(&ci->vbus_work);
1827 usb_del_gadget_udc(&ci->gadget);
1831 dma_pool_destroy(ci->td_pool);
1832 dma_pool_destroy(ci->qh_pool);
1834 if (!IS_ERR_OR_NULL(ci->transceiver)) {
1835 otg_set_peripheral(ci->transceiver->otg, NULL);
1837 usb_put_phy(ci->transceiver);
1839 dbg_remove_files(&ci->gadget.dev);
1840 device_unregister(&ci->gadget.dev);
1841 /* my kobject is dynamic, I swear! */
1842 memset(&ci->gadget, 0, sizeof(ci->gadget));
1846 * ci_hdrc_gadget_init - initialize device related bits
1847 * ci: the controller
1849 * This function enables the gadget role, if the device is "device capable".
1851 int ci_hdrc_gadget_init(struct ci13xxx *ci)
1853 struct ci_role_driver *rdrv;
1855 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC))
1858 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
1862 rdrv->start = udc_start;
1863 rdrv->stop = udc_stop;
1864 rdrv->irq = udc_irq;
1865 rdrv->name = "gadget";
1866 ci->roles[CI_ROLE_GADGET] = rdrv;
1867 INIT_WORK(&ci->vbus_work, vbus_work);