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/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 ci_hdrc *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 ci_hdrc *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);
87 hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
89 hw_write(ci, OP_USBINTR, ~0, 0);
90 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
96 * hw_ep_flush: flush endpoint fifo (execute without interruption)
97 * @num: endpoint number
98 * @dir: endpoint direction
100 * This function returns an error code
102 static int hw_ep_flush(struct ci_hdrc *ci, int num, int dir)
104 int n = hw_ep_bit(num, dir);
107 /* flush any pending transfer */
108 hw_write(ci, OP_ENDPTFLUSH, ~0, BIT(n));
109 while (hw_read(ci, OP_ENDPTFLUSH, BIT(n)))
111 } while (hw_read(ci, OP_ENDPTSTAT, BIT(n)));
117 * hw_ep_disable: disables endpoint (execute without interruption)
118 * @num: endpoint number
119 * @dir: endpoint direction
121 * This function returns an error code
123 static int hw_ep_disable(struct ci_hdrc *ci, int num, int dir)
125 hw_ep_flush(ci, num, dir);
126 hw_write(ci, OP_ENDPTCTRL + num,
127 dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
132 * hw_ep_enable: enables endpoint (execute without interruption)
133 * @num: endpoint number
134 * @dir: endpoint direction
135 * @type: endpoint type
137 * This function returns an error code
139 static int hw_ep_enable(struct ci_hdrc *ci, int num, int dir, int type)
144 mask = ENDPTCTRL_TXT; /* type */
145 data = type << __ffs(mask);
147 mask |= ENDPTCTRL_TXS; /* unstall */
148 mask |= ENDPTCTRL_TXR; /* reset data toggle */
149 data |= ENDPTCTRL_TXR;
150 mask |= ENDPTCTRL_TXE; /* enable */
151 data |= ENDPTCTRL_TXE;
153 mask = ENDPTCTRL_RXT; /* type */
154 data = type << __ffs(mask);
156 mask |= ENDPTCTRL_RXS; /* unstall */
157 mask |= ENDPTCTRL_RXR; /* reset data toggle */
158 data |= ENDPTCTRL_RXR;
159 mask |= ENDPTCTRL_RXE; /* enable */
160 data |= ENDPTCTRL_RXE;
162 hw_write(ci, OP_ENDPTCTRL + num, mask, data);
167 * hw_ep_get_halt: return endpoint halt status
168 * @num: endpoint number
169 * @dir: endpoint direction
171 * This function returns 1 if endpoint halted
173 static int hw_ep_get_halt(struct ci_hdrc *ci, int num, int dir)
175 u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
177 return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0;
181 * hw_ep_prime: primes endpoint (execute without interruption)
182 * @num: endpoint number
183 * @dir: endpoint direction
184 * @is_ctrl: true if control endpoint
186 * This function returns an error code
188 static int hw_ep_prime(struct ci_hdrc *ci, int num, int dir, int is_ctrl)
190 int n = hw_ep_bit(num, dir);
192 if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
195 hw_write(ci, OP_ENDPTPRIME, ~0, BIT(n));
197 while (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
199 if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num)))
202 /* status shoult be tested according with manual but it doesn't work */
207 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
208 * without interruption)
209 * @num: endpoint number
210 * @dir: endpoint direction
211 * @value: true => stall, false => unstall
213 * This function returns an error code
215 static int hw_ep_set_halt(struct ci_hdrc *ci, int num, int dir, int value)
217 if (value != 0 && value != 1)
221 enum ci_hw_regs reg = OP_ENDPTCTRL + num;
222 u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
223 u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
225 /* data toggle - reserved for EP0 but it's in ESS */
226 hw_write(ci, reg, mask_xs|mask_xr,
227 value ? mask_xs : mask_xr);
228 } while (value != hw_ep_get_halt(ci, num, dir));
234 * hw_is_port_high_speed: test if port is high speed
236 * This function returns true if high speed port
238 static int hw_port_is_high_speed(struct ci_hdrc *ci)
240 return ci->hw_bank.lpm ? hw_read(ci, OP_DEVLC, DEVLC_PSPD) :
241 hw_read(ci, OP_PORTSC, PORTSC_HSP);
245 * hw_read_intr_enable: returns interrupt enable register
247 * This function returns register data
249 static u32 hw_read_intr_enable(struct ci_hdrc *ci)
251 return hw_read(ci, OP_USBINTR, ~0);
255 * hw_read_intr_status: returns interrupt status register
257 * This function returns register data
259 static u32 hw_read_intr_status(struct ci_hdrc *ci)
261 return hw_read(ci, OP_USBSTS, ~0);
265 * hw_test_and_clear_complete: test & clear complete status (execute without
267 * @n: endpoint number
269 * This function returns complete status
271 static int hw_test_and_clear_complete(struct ci_hdrc *ci, int n)
273 n = ep_to_bit(ci, n);
274 return hw_test_and_clear(ci, OP_ENDPTCOMPLETE, BIT(n));
278 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
279 * without interruption)
281 * This function returns active interrutps
283 static u32 hw_test_and_clear_intr_active(struct ci_hdrc *ci)
285 u32 reg = hw_read_intr_status(ci) & hw_read_intr_enable(ci);
287 hw_write(ci, OP_USBSTS, ~0, reg);
292 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
295 * This function returns guard value
297 static int hw_test_and_clear_setup_guard(struct ci_hdrc *ci)
299 return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, 0);
303 * hw_test_and_set_setup_guard: test & set setup guard (execute without
306 * This function returns guard value
308 static int hw_test_and_set_setup_guard(struct ci_hdrc *ci)
310 return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
314 * hw_usb_set_address: configures USB address (execute without interruption)
315 * @value: new USB address
317 * This function explicitly sets the address, without the "USBADRA" (advance)
318 * feature, which is not supported by older versions of the controller.
320 static void hw_usb_set_address(struct ci_hdrc *ci, u8 value)
322 hw_write(ci, OP_DEVICEADDR, DEVICEADDR_USBADR,
323 value << __ffs(DEVICEADDR_USBADR));
327 * hw_usb_reset: restart device after a bus reset (execute without
330 * This function returns an error code
332 static int hw_usb_reset(struct ci_hdrc *ci)
334 hw_usb_set_address(ci, 0);
336 /* ESS flushes only at end?!? */
337 hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
339 /* clear setup token semaphores */
340 hw_write(ci, OP_ENDPTSETUPSTAT, 0, 0);
342 /* clear complete status */
343 hw_write(ci, OP_ENDPTCOMPLETE, 0, 0);
345 /* wait until all bits cleared */
346 while (hw_read(ci, OP_ENDPTPRIME, ~0))
347 udelay(10); /* not RTOS friendly */
349 /* reset all endpoints ? */
351 /* reset internal status and wait for further instructions
352 no need to verify the port reset status (ESS does it) */
357 /******************************************************************************
359 *****************************************************************************/
361 static int add_td_to_list(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq,
366 struct td_node *lastnode, *node = kzalloc(sizeof(struct td_node),
372 node->ptr = dma_pool_alloc(hwep->td_pool, GFP_ATOMIC,
374 if (node->ptr == NULL) {
379 memset(node->ptr, 0, sizeof(struct ci_hw_td));
380 node->ptr->token = cpu_to_le32(length << __ffs(TD_TOTAL_BYTES));
381 node->ptr->token &= cpu_to_le32(TD_TOTAL_BYTES);
382 node->ptr->token |= cpu_to_le32(TD_STATUS_ACTIVE);
383 if (hwep->type == USB_ENDPOINT_XFER_ISOC && hwep->dir == TX) {
384 u32 mul = hwreq->req.length / hwep->ep.maxpacket;
386 if (hwreq->req.length == 0
387 || hwreq->req.length % hwep->ep.maxpacket)
389 node->ptr->token |= mul << __ffs(TD_MULTO);
392 temp = (u32) (hwreq->req.dma + hwreq->req.actual);
394 node->ptr->page[0] = cpu_to_le32(temp);
395 for (i = 1; i < TD_PAGE_COUNT; i++) {
396 u32 page = temp + i * CI_HDRC_PAGE_SIZE;
397 page &= ~TD_RESERVED_MASK;
398 node->ptr->page[i] = cpu_to_le32(page);
402 hwreq->req.actual += length;
404 if (!list_empty(&hwreq->tds)) {
405 /* get the last entry */
406 lastnode = list_entry(hwreq->tds.prev,
408 lastnode->ptr->next = cpu_to_le32(node->dma);
411 INIT_LIST_HEAD(&node->td);
412 list_add_tail(&node->td, &hwreq->tds);
418 * _usb_addr: calculates endpoint address from direction & number
421 static inline u8 _usb_addr(struct ci_hw_ep *ep)
423 return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
427 * _hardware_queue: configures a request at hardware level
431 * This function returns an error code
433 static int _hardware_enqueue(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq)
435 struct ci_hdrc *ci = hwep->ci;
437 unsigned rest = hwreq->req.length;
438 int pages = TD_PAGE_COUNT;
439 struct td_node *firstnode, *lastnode;
441 /* don't queue twice */
442 if (hwreq->req.status == -EALREADY)
445 hwreq->req.status = -EALREADY;
447 ret = usb_gadget_map_request(&ci->gadget, &hwreq->req, hwep->dir);
452 * The first buffer could be not page aligned.
453 * In that case we have to span into one extra td.
455 if (hwreq->req.dma % PAGE_SIZE)
459 add_td_to_list(hwep, hwreq, 0);
462 unsigned count = min(hwreq->req.length - hwreq->req.actual,
463 (unsigned)(pages * CI_HDRC_PAGE_SIZE));
464 add_td_to_list(hwep, hwreq, count);
468 if (hwreq->req.zero && hwreq->req.length
469 && (hwreq->req.length % hwep->ep.maxpacket == 0))
470 add_td_to_list(hwep, hwreq, 0);
472 firstnode = list_first_entry(&hwreq->tds, struct td_node, td);
474 lastnode = list_entry(hwreq->tds.prev,
477 lastnode->ptr->next = cpu_to_le32(TD_TERMINATE);
478 if (!hwreq->req.no_interrupt)
479 lastnode->ptr->token |= cpu_to_le32(TD_IOC);
482 hwreq->req.actual = 0;
483 if (!list_empty(&hwep->qh.queue)) {
484 struct ci_hw_req *hwreqprev;
485 int n = hw_ep_bit(hwep->num, hwep->dir);
487 struct td_node *prevlastnode;
488 u32 next = firstnode->dma & TD_ADDR_MASK;
490 hwreqprev = list_entry(hwep->qh.queue.prev,
491 struct ci_hw_req, queue);
492 prevlastnode = list_entry(hwreqprev->tds.prev,
495 prevlastnode->ptr->next = cpu_to_le32(next);
497 if (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
500 hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
501 tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n));
502 } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW));
503 hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0);
508 /* QH configuration */
509 hwep->qh.ptr->td.next = cpu_to_le32(firstnode->dma);
510 hwep->qh.ptr->td.token &=
511 cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE));
513 if (hwep->type == USB_ENDPOINT_XFER_ISOC && hwep->dir == RX) {
514 u32 mul = hwreq->req.length / hwep->ep.maxpacket;
516 if (hwreq->req.length == 0
517 || hwreq->req.length % hwep->ep.maxpacket)
519 hwep->qh.ptr->cap |= mul << __ffs(QH_MULT);
522 wmb(); /* synchronize before ep prime */
524 ret = hw_ep_prime(ci, hwep->num, hwep->dir,
525 hwep->type == USB_ENDPOINT_XFER_CONTROL);
531 * free_pending_td: remove a pending request for the endpoint
534 static void free_pending_td(struct ci_hw_ep *hwep)
536 struct td_node *pending = hwep->pending_td;
538 dma_pool_free(hwep->td_pool, pending->ptr, pending->dma);
539 hwep->pending_td = NULL;
544 * _hardware_dequeue: handles a request at hardware level
548 * This function returns an error code
550 static int _hardware_dequeue(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq)
553 struct td_node *node, *tmpnode;
554 unsigned remaining_length;
555 unsigned actual = hwreq->req.length;
557 if (hwreq->req.status != -EALREADY)
560 hwreq->req.status = 0;
562 list_for_each_entry_safe(node, tmpnode, &hwreq->tds, td) {
563 tmptoken = le32_to_cpu(node->ptr->token);
564 if ((TD_STATUS_ACTIVE & tmptoken) != 0) {
565 hwreq->req.status = -EALREADY;
569 remaining_length = (tmptoken & TD_TOTAL_BYTES);
570 remaining_length >>= __ffs(TD_TOTAL_BYTES);
571 actual -= remaining_length;
573 hwreq->req.status = tmptoken & TD_STATUS;
574 if ((TD_STATUS_HALTED & hwreq->req.status)) {
575 hwreq->req.status = -EPIPE;
577 } else if ((TD_STATUS_DT_ERR & hwreq->req.status)) {
578 hwreq->req.status = -EPROTO;
580 } else if ((TD_STATUS_TR_ERR & hwreq->req.status)) {
581 hwreq->req.status = -EILSEQ;
585 if (remaining_length) {
587 hwreq->req.status = -EPROTO;
592 * As the hardware could still address the freed td
593 * which will run the udc unusable, the cleanup of the
594 * td has to be delayed by one.
596 if (hwep->pending_td)
597 free_pending_td(hwep);
599 hwep->pending_td = node;
600 list_del_init(&node->td);
603 usb_gadget_unmap_request(&hwep->ci->gadget, &hwreq->req, hwep->dir);
605 hwreq->req.actual += actual;
607 if (hwreq->req.status)
608 return hwreq->req.status;
610 return hwreq->req.actual;
614 * _ep_nuke: dequeues all endpoint requests
617 * This function returns an error code
618 * Caller must hold lock
620 static int _ep_nuke(struct ci_hw_ep *hwep)
621 __releases(hwep->lock)
622 __acquires(hwep->lock)
624 struct td_node *node, *tmpnode;
628 hw_ep_flush(hwep->ci, hwep->num, hwep->dir);
630 while (!list_empty(&hwep->qh.queue)) {
632 /* pop oldest request */
633 struct ci_hw_req *hwreq = list_entry(hwep->qh.queue.next,
634 struct ci_hw_req, queue);
636 list_for_each_entry_safe(node, tmpnode, &hwreq->tds, td) {
637 dma_pool_free(hwep->td_pool, node->ptr, node->dma);
638 list_del_init(&node->td);
643 list_del_init(&hwreq->queue);
644 hwreq->req.status = -ESHUTDOWN;
646 if (hwreq->req.complete != NULL) {
647 spin_unlock(hwep->lock);
648 hwreq->req.complete(&hwep->ep, &hwreq->req);
649 spin_lock(hwep->lock);
653 if (hwep->pending_td)
654 free_pending_td(hwep);
660 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
663 * This function returns an error code
665 static int _gadget_stop_activity(struct usb_gadget *gadget)
668 struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
671 spin_lock_irqsave(&ci->lock, flags);
672 ci->gadget.speed = USB_SPEED_UNKNOWN;
673 ci->remote_wakeup = 0;
675 spin_unlock_irqrestore(&ci->lock, flags);
677 /* flush all endpoints */
678 gadget_for_each_ep(ep, gadget) {
679 usb_ep_fifo_flush(ep);
681 usb_ep_fifo_flush(&ci->ep0out->ep);
682 usb_ep_fifo_flush(&ci->ep0in->ep);
684 /* make sure to disable all endpoints */
685 gadget_for_each_ep(ep, gadget) {
689 if (ci->status != NULL) {
690 usb_ep_free_request(&ci->ep0in->ep, ci->status);
697 /******************************************************************************
699 *****************************************************************************/
701 * isr_reset_handler: USB reset interrupt handler
704 * This function resets USB engine after a bus reset occurred
706 static void isr_reset_handler(struct ci_hdrc *ci)
712 spin_unlock(&ci->lock);
713 if (ci->gadget.speed != USB_SPEED_UNKNOWN) {
715 ci->driver->disconnect(&ci->gadget);
718 retval = _gadget_stop_activity(&ci->gadget);
722 retval = hw_usb_reset(ci);
726 ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC);
727 if (ci->status == NULL)
731 spin_lock(&ci->lock);
734 dev_err(ci->dev, "error: %i\n", retval);
738 * isr_get_status_complete: get_status request complete function
740 * @req: request handled
742 * Caller must release lock
744 static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
746 if (ep == NULL || req == NULL)
750 usb_ep_free_request(ep, req);
754 * _ep_queue: queues (submits) an I/O request to an endpoint
756 * Caller must hold lock
758 static int _ep_queue(struct usb_ep *ep, struct usb_request *req,
759 gfp_t __maybe_unused gfp_flags)
761 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
762 struct ci_hw_req *hwreq = container_of(req, struct ci_hw_req, req);
763 struct ci_hdrc *ci = hwep->ci;
766 if (ep == NULL || req == NULL || hwep->ep.desc == NULL)
769 if (hwep->type == USB_ENDPOINT_XFER_CONTROL) {
771 hwep = (ci->ep0_dir == RX) ?
772 ci->ep0out : ci->ep0in;
773 if (!list_empty(&hwep->qh.queue)) {
776 dev_warn(hwep->ci->dev, "endpoint ctrl %X nuked\n",
781 if (usb_endpoint_xfer_isoc(hwep->ep.desc) &&
782 hwreq->req.length > (1 + hwep->ep.mult) * hwep->ep.maxpacket) {
783 dev_err(hwep->ci->dev, "request length too big for isochronous\n");
787 /* first nuke then test link, e.g. previous status has not sent */
788 if (!list_empty(&hwreq->queue)) {
789 dev_err(hwep->ci->dev, "request already in queue\n");
794 hwreq->req.status = -EINPROGRESS;
795 hwreq->req.actual = 0;
797 retval = _hardware_enqueue(hwep, hwreq);
799 if (retval == -EALREADY)
802 list_add_tail(&hwreq->queue, &hwep->qh.queue);
808 * isr_get_status_response: get_status request response
810 * @setup: setup request packet
812 * This function returns an error code
814 static int isr_get_status_response(struct ci_hdrc *ci,
815 struct usb_ctrlrequest *setup)
816 __releases(hwep->lock)
817 __acquires(hwep->lock)
819 struct ci_hw_ep *hwep = ci->ep0in;
820 struct usb_request *req = NULL;
821 gfp_t gfp_flags = GFP_ATOMIC;
822 int dir, num, retval;
824 if (hwep == NULL || setup == NULL)
827 spin_unlock(hwep->lock);
828 req = usb_ep_alloc_request(&hwep->ep, gfp_flags);
829 spin_lock(hwep->lock);
833 req->complete = isr_get_status_complete;
835 req->buf = kzalloc(req->length, gfp_flags);
836 if (req->buf == NULL) {
841 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
842 /* Assume that device is bus powered for now. */
843 *(u16 *)req->buf = ci->remote_wakeup << 1;
845 } else if ((setup->bRequestType & USB_RECIP_MASK) \
846 == USB_RECIP_ENDPOINT) {
847 dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
849 num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
850 *(u16 *)req->buf = hw_ep_get_halt(ci, num, dir);
852 /* else do nothing; reserved for future use */
854 retval = _ep_queue(&hwep->ep, req, gfp_flags);
863 spin_unlock(hwep->lock);
864 usb_ep_free_request(&hwep->ep, req);
865 spin_lock(hwep->lock);
870 * isr_setup_status_complete: setup_status request complete function
872 * @req: request handled
874 * Caller must release lock. Put the port in test mode if test mode
875 * feature is selected.
878 isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
880 struct ci_hdrc *ci = req->context;
884 hw_usb_set_address(ci, ci->address);
888 spin_lock_irqsave(&ci->lock, flags);
890 hw_port_test_set(ci, ci->test_mode);
891 spin_unlock_irqrestore(&ci->lock, flags);
895 * isr_setup_status_phase: queues the status phase of a setup transation
898 * This function returns an error code
900 static int isr_setup_status_phase(struct ci_hdrc *ci)
903 struct ci_hw_ep *hwep;
905 hwep = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in;
906 ci->status->context = ci;
907 ci->status->complete = isr_setup_status_complete;
909 retval = _ep_queue(&hwep->ep, ci->status, GFP_ATOMIC);
915 * isr_tr_complete_low: transaction complete low level handler
918 * This function returns an error code
919 * Caller must hold lock
921 static int isr_tr_complete_low(struct ci_hw_ep *hwep)
922 __releases(hwep->lock)
923 __acquires(hwep->lock)
925 struct ci_hw_req *hwreq, *hwreqtemp;
926 struct ci_hw_ep *hweptemp = hwep;
929 list_for_each_entry_safe(hwreq, hwreqtemp, &hwep->qh.queue,
931 retval = _hardware_dequeue(hwep, hwreq);
934 list_del_init(&hwreq->queue);
935 if (hwreq->req.complete != NULL) {
936 spin_unlock(hwep->lock);
937 if ((hwep->type == USB_ENDPOINT_XFER_CONTROL) &&
939 hweptemp = hwep->ci->ep0in;
940 hwreq->req.complete(&hweptemp->ep, &hwreq->req);
941 spin_lock(hwep->lock);
945 if (retval == -EBUSY)
952 * isr_tr_complete_handler: transaction complete interrupt handler
953 * @ci: UDC descriptor
955 * This function handles traffic events
957 static void isr_tr_complete_handler(struct ci_hdrc *ci)
964 for (i = 0; i < ci->hw_ep_max; i++) {
965 struct ci_hw_ep *hwep = &ci->ci_hw_ep[i];
966 int type, num, dir, err = -EINVAL;
967 struct usb_ctrlrequest req;
969 if (hwep->ep.desc == NULL)
970 continue; /* not configured */
972 if (hw_test_and_clear_complete(ci, i)) {
973 err = isr_tr_complete_low(hwep);
974 if (hwep->type == USB_ENDPOINT_XFER_CONTROL) {
975 if (err > 0) /* needs status phase */
976 err = isr_setup_status_phase(ci);
978 spin_unlock(&ci->lock);
979 if (usb_ep_set_halt(&hwep->ep))
981 "error: ep_set_halt\n");
982 spin_lock(&ci->lock);
987 /* Only handle setup packet below */
989 !hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(0)))
993 * Flush data and handshake transactions of previous
996 _ep_nuke(ci->ep0out);
999 /* read_setup_packet */
1001 hw_test_and_set_setup_guard(ci);
1002 memcpy(&req, &hwep->qh.ptr->setup, sizeof(req));
1003 } while (!hw_test_and_clear_setup_guard(ci));
1005 type = req.bRequestType;
1007 ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
1009 switch (req.bRequest) {
1010 case USB_REQ_CLEAR_FEATURE:
1011 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1012 le16_to_cpu(req.wValue) ==
1013 USB_ENDPOINT_HALT) {
1014 if (req.wLength != 0)
1016 num = le16_to_cpu(req.wIndex);
1017 dir = num & USB_ENDPOINT_DIR_MASK;
1018 num &= USB_ENDPOINT_NUMBER_MASK;
1020 num += ci->hw_ep_max/2;
1021 if (!ci->ci_hw_ep[num].wedge) {
1022 spin_unlock(&ci->lock);
1023 err = usb_ep_clear_halt(
1024 &ci->ci_hw_ep[num].ep);
1025 spin_lock(&ci->lock);
1029 err = isr_setup_status_phase(ci);
1030 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
1031 le16_to_cpu(req.wValue) ==
1032 USB_DEVICE_REMOTE_WAKEUP) {
1033 if (req.wLength != 0)
1035 ci->remote_wakeup = 0;
1036 err = isr_setup_status_phase(ci);
1041 case USB_REQ_GET_STATUS:
1042 if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
1043 type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
1044 type != (USB_DIR_IN|USB_RECIP_INTERFACE))
1046 if (le16_to_cpu(req.wLength) != 2 ||
1047 le16_to_cpu(req.wValue) != 0)
1049 err = isr_get_status_response(ci, &req);
1051 case USB_REQ_SET_ADDRESS:
1052 if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
1054 if (le16_to_cpu(req.wLength) != 0 ||
1055 le16_to_cpu(req.wIndex) != 0)
1057 ci->address = (u8)le16_to_cpu(req.wValue);
1059 err = isr_setup_status_phase(ci);
1061 case USB_REQ_SET_FEATURE:
1062 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1063 le16_to_cpu(req.wValue) ==
1064 USB_ENDPOINT_HALT) {
1065 if (req.wLength != 0)
1067 num = le16_to_cpu(req.wIndex);
1068 dir = num & USB_ENDPOINT_DIR_MASK;
1069 num &= USB_ENDPOINT_NUMBER_MASK;
1071 num += ci->hw_ep_max/2;
1073 spin_unlock(&ci->lock);
1074 err = usb_ep_set_halt(&ci->ci_hw_ep[num].ep);
1075 spin_lock(&ci->lock);
1077 isr_setup_status_phase(ci);
1078 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
1079 if (req.wLength != 0)
1081 switch (le16_to_cpu(req.wValue)) {
1082 case USB_DEVICE_REMOTE_WAKEUP:
1083 ci->remote_wakeup = 1;
1084 err = isr_setup_status_phase(ci);
1086 case USB_DEVICE_TEST_MODE:
1087 tmode = le16_to_cpu(req.wIndex) >> 8;
1094 ci->test_mode = tmode;
1095 err = isr_setup_status_phase(
1110 if (req.wLength == 0) /* no data phase */
1113 spin_unlock(&ci->lock);
1114 err = ci->driver->setup(&ci->gadget, &req);
1115 spin_lock(&ci->lock);
1120 spin_unlock(&ci->lock);
1121 if (usb_ep_set_halt(&hwep->ep))
1122 dev_err(ci->dev, "error: ep_set_halt\n");
1123 spin_lock(&ci->lock);
1128 /******************************************************************************
1130 *****************************************************************************/
1132 * ep_enable: configure endpoint, making it usable
1134 * Check usb_ep_enable() at "usb_gadget.h" for details
1136 static int ep_enable(struct usb_ep *ep,
1137 const struct usb_endpoint_descriptor *desc)
1139 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1141 unsigned long flags;
1144 if (ep == NULL || desc == NULL)
1147 spin_lock_irqsave(hwep->lock, flags);
1149 /* only internal SW should enable ctrl endpts */
1151 hwep->ep.desc = desc;
1153 if (!list_empty(&hwep->qh.queue))
1154 dev_warn(hwep->ci->dev, "enabling a non-empty endpoint!\n");
1156 hwep->dir = usb_endpoint_dir_in(desc) ? TX : RX;
1157 hwep->num = usb_endpoint_num(desc);
1158 hwep->type = usb_endpoint_type(desc);
1160 hwep->ep.maxpacket = usb_endpoint_maxp(desc) & 0x07ff;
1161 hwep->ep.mult = QH_ISO_MULT(usb_endpoint_maxp(desc));
1163 if (hwep->type == USB_ENDPOINT_XFER_CONTROL)
1167 cap |= (hwep->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT;
1169 * For ISO-TX, we set mult at QH as the largest value, and use
1170 * MultO at TD as real mult value.
1172 if (hwep->type == USB_ENDPOINT_XFER_ISOC && hwep->dir == TX)
1173 cap |= 3 << __ffs(QH_MULT);
1175 hwep->qh.ptr->cap = cpu_to_le32(cap);
1177 hwep->qh.ptr->td.next |= cpu_to_le32(TD_TERMINATE); /* needed? */
1179 if (hwep->num != 0 && hwep->type == USB_ENDPOINT_XFER_CONTROL) {
1180 dev_err(hwep->ci->dev, "Set control xfer at non-ep0\n");
1185 * Enable endpoints in the HW other than ep0 as ep0
1189 retval |= hw_ep_enable(hwep->ci, hwep->num, hwep->dir,
1192 spin_unlock_irqrestore(hwep->lock, flags);
1197 * ep_disable: endpoint is no longer usable
1199 * Check usb_ep_disable() at "usb_gadget.h" for details
1201 static int ep_disable(struct usb_ep *ep)
1203 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1204 int direction, retval = 0;
1205 unsigned long flags;
1209 else if (hwep->ep.desc == NULL)
1212 spin_lock_irqsave(hwep->lock, flags);
1214 /* only internal SW should disable ctrl endpts */
1216 direction = hwep->dir;
1218 retval |= _ep_nuke(hwep);
1219 retval |= hw_ep_disable(hwep->ci, hwep->num, hwep->dir);
1221 if (hwep->type == USB_ENDPOINT_XFER_CONTROL)
1222 hwep->dir = (hwep->dir == TX) ? RX : TX;
1224 } while (hwep->dir != direction);
1226 hwep->ep.desc = NULL;
1228 spin_unlock_irqrestore(hwep->lock, flags);
1233 * ep_alloc_request: allocate a request object to use with this endpoint
1235 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
1237 static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
1239 struct ci_hw_req *hwreq = NULL;
1244 hwreq = kzalloc(sizeof(struct ci_hw_req), gfp_flags);
1245 if (hwreq != NULL) {
1246 INIT_LIST_HEAD(&hwreq->queue);
1247 INIT_LIST_HEAD(&hwreq->tds);
1250 return (hwreq == NULL) ? NULL : &hwreq->req;
1254 * ep_free_request: frees a request object
1256 * Check usb_ep_free_request() at "usb_gadget.h" for details
1258 static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
1260 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1261 struct ci_hw_req *hwreq = container_of(req, struct ci_hw_req, req);
1262 struct td_node *node, *tmpnode;
1263 unsigned long flags;
1265 if (ep == NULL || req == NULL) {
1267 } else if (!list_empty(&hwreq->queue)) {
1268 dev_err(hwep->ci->dev, "freeing queued request\n");
1272 spin_lock_irqsave(hwep->lock, flags);
1274 list_for_each_entry_safe(node, tmpnode, &hwreq->tds, td) {
1275 dma_pool_free(hwep->td_pool, node->ptr, node->dma);
1276 list_del_init(&node->td);
1283 spin_unlock_irqrestore(hwep->lock, flags);
1287 * ep_queue: queues (submits) an I/O request to an endpoint
1289 * Check usb_ep_queue()* at usb_gadget.h" for details
1291 static int ep_queue(struct usb_ep *ep, struct usb_request *req,
1292 gfp_t __maybe_unused gfp_flags)
1294 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1296 unsigned long flags;
1298 if (ep == NULL || req == NULL || hwep->ep.desc == NULL)
1301 spin_lock_irqsave(hwep->lock, flags);
1302 retval = _ep_queue(ep, req, gfp_flags);
1303 spin_unlock_irqrestore(hwep->lock, flags);
1308 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
1310 * Check usb_ep_dequeue() at "usb_gadget.h" for details
1312 static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
1314 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1315 struct ci_hw_req *hwreq = container_of(req, struct ci_hw_req, req);
1316 unsigned long flags;
1318 if (ep == NULL || req == NULL || hwreq->req.status != -EALREADY ||
1319 hwep->ep.desc == NULL || list_empty(&hwreq->queue) ||
1320 list_empty(&hwep->qh.queue))
1323 spin_lock_irqsave(hwep->lock, flags);
1325 hw_ep_flush(hwep->ci, hwep->num, hwep->dir);
1328 list_del_init(&hwreq->queue);
1330 usb_gadget_unmap_request(&hwep->ci->gadget, req, hwep->dir);
1332 req->status = -ECONNRESET;
1334 if (hwreq->req.complete != NULL) {
1335 spin_unlock(hwep->lock);
1336 hwreq->req.complete(&hwep->ep, &hwreq->req);
1337 spin_lock(hwep->lock);
1340 spin_unlock_irqrestore(hwep->lock, flags);
1345 * ep_set_halt: sets the endpoint halt feature
1347 * Check usb_ep_set_halt() at "usb_gadget.h" for details
1349 static int ep_set_halt(struct usb_ep *ep, int value)
1351 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1352 int direction, retval = 0;
1353 unsigned long flags;
1355 if (ep == NULL || hwep->ep.desc == NULL)
1358 if (usb_endpoint_xfer_isoc(hwep->ep.desc))
1361 spin_lock_irqsave(hwep->lock, flags);
1364 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
1365 if (value && hwep->type == USB_ENDPOINT_XFER_BULK && hwep->dir == TX &&
1366 !list_empty(&hwep->qh.queue)) {
1367 spin_unlock_irqrestore(hwep->lock, flags);
1372 direction = hwep->dir;
1374 retval |= hw_ep_set_halt(hwep->ci, hwep->num, hwep->dir, value);
1379 if (hwep->type == USB_ENDPOINT_XFER_CONTROL)
1380 hwep->dir = (hwep->dir == TX) ? RX : TX;
1382 } while (hwep->dir != direction);
1384 spin_unlock_irqrestore(hwep->lock, flags);
1389 * ep_set_wedge: sets the halt feature and ignores clear requests
1391 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
1393 static int ep_set_wedge(struct usb_ep *ep)
1395 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1396 unsigned long flags;
1398 if (ep == NULL || hwep->ep.desc == NULL)
1401 spin_lock_irqsave(hwep->lock, flags);
1403 spin_unlock_irqrestore(hwep->lock, flags);
1405 return usb_ep_set_halt(ep);
1409 * ep_fifo_flush: flushes contents of a fifo
1411 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
1413 static void ep_fifo_flush(struct usb_ep *ep)
1415 struct ci_hw_ep *hwep = container_of(ep, struct ci_hw_ep, ep);
1416 unsigned long flags;
1419 dev_err(hwep->ci->dev, "%02X: -EINVAL\n", _usb_addr(hwep));
1423 spin_lock_irqsave(hwep->lock, flags);
1425 hw_ep_flush(hwep->ci, hwep->num, hwep->dir);
1427 spin_unlock_irqrestore(hwep->lock, flags);
1431 * Endpoint-specific part of the API to the USB controller hardware
1432 * Check "usb_gadget.h" for details
1434 static const struct usb_ep_ops usb_ep_ops = {
1435 .enable = ep_enable,
1436 .disable = ep_disable,
1437 .alloc_request = ep_alloc_request,
1438 .free_request = ep_free_request,
1440 .dequeue = ep_dequeue,
1441 .set_halt = ep_set_halt,
1442 .set_wedge = ep_set_wedge,
1443 .fifo_flush = ep_fifo_flush,
1446 /******************************************************************************
1448 *****************************************************************************/
1449 static int ci_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
1451 struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
1452 unsigned long flags;
1453 int gadget_ready = 0;
1455 spin_lock_irqsave(&ci->lock, flags);
1456 ci->vbus_active = is_active;
1459 spin_unlock_irqrestore(&ci->lock, flags);
1463 pm_runtime_get_sync(&_gadget->dev);
1464 hw_device_reset(ci, USBMODE_CM_DC);
1465 hw_device_state(ci, ci->ep0out->qh.dma);
1466 dev_dbg(ci->dev, "Connected to host\n");
1469 ci->driver->disconnect(&ci->gadget);
1470 hw_device_state(ci, 0);
1471 if (ci->platdata->notify_event)
1472 ci->platdata->notify_event(ci,
1473 CI_HDRC_CONTROLLER_STOPPED_EVENT);
1474 _gadget_stop_activity(&ci->gadget);
1475 pm_runtime_put_sync(&_gadget->dev);
1476 dev_dbg(ci->dev, "Disconnected from host\n");
1483 static int ci_udc_wakeup(struct usb_gadget *_gadget)
1485 struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
1486 unsigned long flags;
1489 spin_lock_irqsave(&ci->lock, flags);
1490 if (!ci->remote_wakeup) {
1494 if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) {
1498 hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR);
1500 spin_unlock_irqrestore(&ci->lock, flags);
1504 static int ci_udc_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1506 struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
1508 if (ci->transceiver)
1509 return usb_phy_set_power(ci->transceiver, ma);
1513 /* Change Data+ pullup status
1514 * this func is used by usb_gadget_connect/disconnet
1516 static int ci_udc_pullup(struct usb_gadget *_gadget, int is_on)
1518 struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
1520 if (!ci->vbus_active)
1524 hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
1526 hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
1531 static int ci_udc_start(struct usb_gadget *gadget,
1532 struct usb_gadget_driver *driver);
1533 static int ci_udc_stop(struct usb_gadget *gadget,
1534 struct usb_gadget_driver *driver);
1536 * Device operations part of the API to the USB controller hardware,
1537 * which don't involve endpoints (or i/o)
1538 * Check "usb_gadget.h" for details
1540 static const struct usb_gadget_ops usb_gadget_ops = {
1541 .vbus_session = ci_udc_vbus_session,
1542 .wakeup = ci_udc_wakeup,
1543 .pullup = ci_udc_pullup,
1544 .vbus_draw = ci_udc_vbus_draw,
1545 .udc_start = ci_udc_start,
1546 .udc_stop = ci_udc_stop,
1549 static int init_eps(struct ci_hdrc *ci)
1551 int retval = 0, i, j;
1553 for (i = 0; i < ci->hw_ep_max/2; i++)
1554 for (j = RX; j <= TX; j++) {
1555 int k = i + j * ci->hw_ep_max/2;
1556 struct ci_hw_ep *hwep = &ci->ci_hw_ep[k];
1558 scnprintf(hwep->name, sizeof(hwep->name), "ep%i%s", i,
1559 (j == TX) ? "in" : "out");
1562 hwep->lock = &ci->lock;
1563 hwep->td_pool = ci->td_pool;
1565 hwep->ep.name = hwep->name;
1566 hwep->ep.ops = &usb_ep_ops;
1568 * for ep0: maxP defined in desc, for other
1569 * eps, maxP is set by epautoconfig() called
1572 usb_ep_set_maxpacket_limit(&hwep->ep, (unsigned short)~0);
1574 INIT_LIST_HEAD(&hwep->qh.queue);
1575 hwep->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL,
1577 if (hwep->qh.ptr == NULL)
1580 memset(hwep->qh.ptr, 0, sizeof(*hwep->qh.ptr));
1583 * set up shorthands for ep0 out and in endpoints,
1584 * don't add to gadget's ep_list
1592 usb_ep_set_maxpacket_limit(&hwep->ep, CTRL_PAYLOAD_MAX);
1596 list_add_tail(&hwep->ep.ep_list, &ci->gadget.ep_list);
1602 static void destroy_eps(struct ci_hdrc *ci)
1606 for (i = 0; i < ci->hw_ep_max; i++) {
1607 struct ci_hw_ep *hwep = &ci->ci_hw_ep[i];
1609 if (hwep->pending_td)
1610 free_pending_td(hwep);
1611 dma_pool_free(ci->qh_pool, hwep->qh.ptr, hwep->qh.dma);
1616 * ci_udc_start: register a gadget driver
1617 * @gadget: our gadget
1618 * @driver: the driver being registered
1620 * Interrupts are enabled here.
1622 static int ci_udc_start(struct usb_gadget *gadget,
1623 struct usb_gadget_driver *driver)
1625 struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
1626 unsigned long flags;
1627 int retval = -ENOMEM;
1629 if (driver->disconnect == NULL)
1633 ci->ep0out->ep.desc = &ctrl_endpt_out_desc;
1634 retval = usb_ep_enable(&ci->ep0out->ep);
1638 ci->ep0in->ep.desc = &ctrl_endpt_in_desc;
1639 retval = usb_ep_enable(&ci->ep0in->ep);
1643 ci->driver = driver;
1644 pm_runtime_get_sync(&ci->gadget.dev);
1645 if (ci->vbus_active) {
1646 spin_lock_irqsave(&ci->lock, flags);
1647 hw_device_reset(ci, USBMODE_CM_DC);
1649 pm_runtime_put_sync(&ci->gadget.dev);
1653 retval = hw_device_state(ci, ci->ep0out->qh.dma);
1654 spin_unlock_irqrestore(&ci->lock, flags);
1656 pm_runtime_put_sync(&ci->gadget.dev);
1662 * ci_udc_stop: unregister a gadget driver
1664 static int ci_udc_stop(struct usb_gadget *gadget,
1665 struct usb_gadget_driver *driver)
1667 struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
1668 unsigned long flags;
1670 spin_lock_irqsave(&ci->lock, flags);
1672 if (ci->vbus_active) {
1673 hw_device_state(ci, 0);
1674 if (ci->platdata->notify_event)
1675 ci->platdata->notify_event(ci,
1676 CI_HDRC_CONTROLLER_STOPPED_EVENT);
1677 spin_unlock_irqrestore(&ci->lock, flags);
1678 _gadget_stop_activity(&ci->gadget);
1679 spin_lock_irqsave(&ci->lock, flags);
1680 pm_runtime_put(&ci->gadget.dev);
1684 spin_unlock_irqrestore(&ci->lock, flags);
1689 /******************************************************************************
1691 *****************************************************************************/
1693 * udc_irq: ci interrupt handler
1695 * This function returns IRQ_HANDLED if the IRQ has been handled
1696 * It locks access to registers
1698 static irqreturn_t udc_irq(struct ci_hdrc *ci)
1706 spin_lock(&ci->lock);
1708 if (ci->platdata->flags & CI_HDRC_REGS_SHARED) {
1709 if (hw_read(ci, OP_USBMODE, USBMODE_CM) !=
1711 spin_unlock(&ci->lock);
1715 intr = hw_test_and_clear_intr_active(ci);
1718 /* order defines priority - do NOT change it */
1719 if (USBi_URI & intr)
1720 isr_reset_handler(ci);
1722 if (USBi_PCI & intr) {
1723 ci->gadget.speed = hw_port_is_high_speed(ci) ?
1724 USB_SPEED_HIGH : USB_SPEED_FULL;
1725 if (ci->suspended && ci->driver->resume) {
1726 spin_unlock(&ci->lock);
1727 ci->driver->resume(&ci->gadget);
1728 spin_lock(&ci->lock);
1734 isr_tr_complete_handler(ci);
1736 if (USBi_SLI & intr) {
1737 if (ci->gadget.speed != USB_SPEED_UNKNOWN &&
1738 ci->driver->suspend) {
1740 spin_unlock(&ci->lock);
1741 ci->driver->suspend(&ci->gadget);
1742 spin_lock(&ci->lock);
1745 retval = IRQ_HANDLED;
1749 spin_unlock(&ci->lock);
1755 * udc_start: initialize gadget role
1756 * @ci: chipidea controller
1758 static int udc_start(struct ci_hdrc *ci)
1760 struct device *dev = ci->dev;
1763 spin_lock_init(&ci->lock);
1765 ci->gadget.ops = &usb_gadget_ops;
1766 ci->gadget.speed = USB_SPEED_UNKNOWN;
1767 ci->gadget.max_speed = USB_SPEED_HIGH;
1768 ci->gadget.is_otg = 0;
1769 ci->gadget.name = ci->platdata->name;
1771 INIT_LIST_HEAD(&ci->gadget.ep_list);
1773 /* alloc resources */
1774 ci->qh_pool = dma_pool_create("ci_hw_qh", dev,
1775 sizeof(struct ci_hw_qh),
1776 64, CI_HDRC_PAGE_SIZE);
1777 if (ci->qh_pool == NULL)
1780 ci->td_pool = dma_pool_create("ci_hw_td", dev,
1781 sizeof(struct ci_hw_td),
1782 64, CI_HDRC_PAGE_SIZE);
1783 if (ci->td_pool == NULL) {
1788 retval = init_eps(ci);
1792 ci->gadget.ep0 = &ci->ep0in->ep;
1794 retval = usb_add_gadget_udc(dev, &ci->gadget);
1798 pm_runtime_no_callbacks(&ci->gadget.dev);
1799 pm_runtime_enable(&ci->gadget.dev);
1806 dma_pool_destroy(ci->td_pool);
1808 dma_pool_destroy(ci->qh_pool);
1813 * ci_hdrc_gadget_destroy: parent remove must call this to remove UDC
1815 * No interrupts active, the IRQ has been released
1817 void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
1819 if (!ci->roles[CI_ROLE_GADGET])
1822 usb_del_gadget_udc(&ci->gadget);
1826 dma_pool_destroy(ci->td_pool);
1827 dma_pool_destroy(ci->qh_pool);
1830 static int udc_id_switch_for_device(struct ci_hdrc *ci)
1833 ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
1834 ci_enable_otg_interrupt(ci, OTGSC_BSVIE);
1840 static void udc_id_switch_for_host(struct ci_hdrc *ci)
1843 /* host doesn't care B_SESSION_VALID event */
1844 ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
1845 ci_disable_otg_interrupt(ci, OTGSC_BSVIE);
1850 * ci_hdrc_gadget_init - initialize device related bits
1851 * ci: the controller
1853 * This function initializes the gadget, if the device is "device capable".
1855 int ci_hdrc_gadget_init(struct ci_hdrc *ci)
1857 struct ci_role_driver *rdrv;
1859 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC))
1862 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
1866 rdrv->start = udc_id_switch_for_device;
1867 rdrv->stop = udc_id_switch_for_host;
1868 rdrv->irq = udc_irq;
1869 rdrv->name = "gadget";
1870 ci->roles[CI_ROLE_GADGET] = rdrv;
1872 return udc_start(ci);