2 * driver/usb/gadget/fsl_qe_udc.c
4 * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved.
6 * Xie Xiaobo <X.Xie@freescale.com>
7 * Li Yang <leoli@freescale.com>
8 * Based on bareboard code from Shlomi Gridish.
11 * Freescle QE/CPM USB Pheripheral Controller Driver
12 * The controller can be found on MPC8360, MPC8272, and etc.
13 * MPC8360 Rev 1.1 may need QE mircocode update
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/init.h>
26 #include <linux/ioport.h>
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/err.h>
30 #include <linux/slab.h>
31 #include <linux/list.h>
32 #include <linux/interrupt.h>
34 #include <linux/moduleparam.h>
35 #include <linux/of_address.h>
36 #include <linux/of_platform.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/usb/ch9.h>
39 #include <linux/usb/gadget.h>
40 #include <linux/usb/otg.h>
45 #include "fsl_qe_udc.h"
47 #define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver"
48 #define DRIVER_AUTHOR "Xie XiaoBo"
49 #define DRIVER_VERSION "1.0"
51 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
53 static const char driver_name[] = "fsl_qe_udc";
54 static const char driver_desc[] = DRIVER_DESC;
56 /*ep name is important in gadget, it should obey the convention of ep_match()*/
57 static const char *const ep_name[] = {
58 "ep0-control", /* everyone has ep0 */
59 /* 3 configurable endpoints */
65 static struct usb_endpoint_descriptor qe_ep0_desc = {
66 .bLength = USB_DT_ENDPOINT_SIZE,
67 .bDescriptorType = USB_DT_ENDPOINT,
69 .bEndpointAddress = 0,
70 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
71 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
74 /* it is initialized in probe() */
75 static struct qe_udc *udc_controller;
77 /********************************************************************
78 * Internal Used Function Start
79 ********************************************************************/
80 /*-----------------------------------------------------------------
81 * done() - retire a request; caller blocked irqs
82 *--------------------------------------------------------------*/
83 static void done(struct qe_ep *ep, struct qe_req *req, int status)
85 struct qe_udc *udc = ep->udc;
86 unsigned char stopped = ep->stopped;
88 /* the req->queue pointer is used by ep_queue() func, in which
89 * the request will be added into a udc_ep->queue 'd tail
90 * so here the req will be dropped from the ep->queue
92 list_del_init(&req->queue);
94 /* req.status should be set as -EINPROGRESS in ep_queue() */
95 if (req->req.status == -EINPROGRESS)
96 req->req.status = status;
98 status = req->req.status;
101 dma_unmap_single(udc->gadget.dev.parent,
102 req->req.dma, req->req.length,
106 req->req.dma = DMA_ADDR_INVALID;
109 dma_sync_single_for_cpu(udc->gadget.dev.parent,
110 req->req.dma, req->req.length,
115 if (status && (status != -ESHUTDOWN))
116 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
117 ep->ep.name, &req->req, status,
118 req->req.actual, req->req.length);
120 /* don't modify queue heads during completion callback */
122 spin_unlock(&udc->lock);
124 /* this complete() should a func implemented by gadget layer,
125 * eg fsg->bulk_in_complete() */
126 if (req->req.complete)
127 req->req.complete(&ep->ep, &req->req);
129 spin_lock(&udc->lock);
131 ep->stopped = stopped;
134 /*-----------------------------------------------------------------
135 * nuke(): delete all requests related to this ep
136 *--------------------------------------------------------------*/
137 static void nuke(struct qe_ep *ep, int status)
139 /* Whether this eq has request linked */
140 while (!list_empty(&ep->queue)) {
141 struct qe_req *req = NULL;
142 req = list_entry(ep->queue.next, struct qe_req, queue);
144 done(ep, req, status);
148 /*---------------------------------------------------------------------------*
149 * USB and Endpoint manipulate process, include parameter and register *
150 *---------------------------------------------------------------------------*/
151 /* @value: 1--set stall 0--clean stall */
152 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
155 u8 epnum = ep->epnum;
156 struct qe_udc *udc = ep->udc;
158 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
159 tem_usep = tem_usep & ~USB_RHS_MASK;
161 tem_usep |= USB_RHS_STALL;
162 else if (ep->dir == USB_DIR_IN)
163 tem_usep |= USB_RHS_IGNORE_OUT;
165 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
169 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
172 u8 epnum = ep->epnum;
173 struct qe_udc *udc = ep->udc;
175 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
176 tem_usep = tem_usep & ~USB_THS_MASK;
178 tem_usep |= USB_THS_STALL;
179 else if (ep->dir == USB_DIR_OUT)
180 tem_usep |= USB_THS_IGNORE_IN;
182 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
187 static int qe_ep0_stall(struct qe_udc *udc)
189 qe_eptx_stall_change(&udc->eps[0], 1);
190 qe_eprx_stall_change(&udc->eps[0], 1);
191 udc_controller->ep0_state = WAIT_FOR_SETUP;
192 udc_controller->ep0_dir = 0;
196 static int qe_eprx_nack(struct qe_ep *ep)
198 u8 epnum = ep->epnum;
199 struct qe_udc *udc = ep->udc;
201 if (ep->state == EP_STATE_IDLE) {
202 /* Set the ep's nack */
203 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
204 USB_RHS_MASK, USB_RHS_NACK);
206 /* Mask Rx and Busy interrupts */
207 clrbits16(&udc->usb_regs->usb_usbmr,
208 (USB_E_RXB_MASK | USB_E_BSY_MASK));
210 ep->state = EP_STATE_NACK;
215 static int qe_eprx_normal(struct qe_ep *ep)
217 struct qe_udc *udc = ep->udc;
219 if (ep->state == EP_STATE_NACK) {
220 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
221 USB_RTHS_MASK, USB_THS_IGNORE_IN);
223 /* Unmask RX interrupts */
224 out_be16(&udc->usb_regs->usb_usber,
225 USB_E_BSY_MASK | USB_E_RXB_MASK);
226 setbits16(&udc->usb_regs->usb_usbmr,
227 (USB_E_RXB_MASK | USB_E_BSY_MASK));
229 ep->state = EP_STATE_IDLE;
236 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
238 if (ep->udc->soc_type == PORT_CPM)
239 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
240 CPM_USB_STOP_TX_OPCODE);
242 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
248 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
250 if (ep->udc->soc_type == PORT_CPM)
251 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
252 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
254 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
260 static int qe_ep_flushtxfifo(struct qe_ep *ep)
262 struct qe_udc *udc = ep->udc;
267 qe_ep_cmd_stoptx(ep);
268 out_8(&udc->usb_regs->usb_uscom,
269 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
270 out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
271 out_be32(&udc->ep_param[i]->tstate, 0);
272 out_be16(&udc->ep_param[i]->tbcnt, 0);
274 ep->c_txbd = ep->txbase;
275 ep->n_txbd = ep->txbase;
276 qe_ep_cmd_restarttx(ep);
280 static int qe_ep_filltxfifo(struct qe_ep *ep)
282 struct qe_udc *udc = ep->udc;
284 out_8(&udc->usb_regs->usb_uscom,
285 USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
289 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
293 struct qe_bd __iomem *bd;
296 ep = &udc->eps[pipe_num];
298 if (ep->dir == USB_DIR_OUT)
299 bdring_len = USB_BDRING_LEN_RX;
301 bdring_len = USB_BDRING_LEN;
304 for (i = 0; i < (bdring_len - 1); i++) {
305 out_be32((u32 __iomem *)bd, R_E | R_I);
308 out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
311 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
312 out_be32(&bd->buf, 0);
313 out_be32((u32 __iomem *)bd, 0);
316 out_be32((u32 __iomem *)bd, T_W);
321 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
326 ep = &udc->eps[pipe_num];
327 tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
328 tmpusep &= ~USB_RTHS_MASK;
332 qe_ep_flushtxfifo(ep);
335 tmpusep |= USB_THS_IGNORE_IN;
338 qe_ep_flushtxfifo(ep);
339 tmpusep |= USB_RHS_IGNORE_OUT;
344 out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
346 qe_epbds_reset(udc, pipe_num);
351 static int qe_ep_toggledata01(struct qe_ep *ep)
357 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
359 struct qe_ep *ep = &udc->eps[pipe_num];
360 unsigned long tmp_addr = 0;
361 struct usb_ep_para __iomem *epparam;
363 struct qe_bd __iomem *bd;
366 if (ep->dir == USB_DIR_OUT)
367 bdring_len = USB_BDRING_LEN_RX;
369 bdring_len = USB_BDRING_LEN;
371 epparam = udc->ep_param[pipe_num];
372 /* alloc multi-ram for BD rings and set the ep parameters */
373 tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
374 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
375 if (IS_ERR_VALUE(tmp_addr))
378 out_be16(&epparam->rbase, (u16)tmp_addr);
379 out_be16(&epparam->tbase, (u16)(tmp_addr +
380 (sizeof(struct qe_bd) * bdring_len)));
382 out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
383 out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
385 ep->rxbase = cpm_muram_addr(tmp_addr);
386 ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
388 ep->n_rxbd = ep->rxbase;
389 ep->e_rxbd = ep->rxbase;
390 ep->n_txbd = ep->txbase;
391 ep->c_txbd = ep->txbase;
392 ep->data01 = 0; /* data0 */
394 /* Init TX and RX bds */
396 for (i = 0; i < bdring_len - 1; i++) {
397 out_be32(&bd->buf, 0);
398 out_be32((u32 __iomem *)bd, 0);
401 out_be32(&bd->buf, 0);
402 out_be32((u32 __iomem *)bd, R_W);
405 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
406 out_be32(&bd->buf, 0);
407 out_be32((u32 __iomem *)bd, 0);
410 out_be32(&bd->buf, 0);
411 out_be32((u32 __iomem *)bd, T_W);
416 static int qe_ep_rxbd_update(struct qe_ep *ep)
421 struct qe_bd __iomem *bd;
422 unsigned int bdring_len;
424 if (ep->rxbase == NULL)
429 ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
430 if (ep->rxframe == NULL) {
431 dev_err(ep->udc->dev, "malloc rxframe failed\n");
435 qe_frame_init(ep->rxframe);
437 if (ep->dir == USB_DIR_OUT)
438 bdring_len = USB_BDRING_LEN_RX;
440 bdring_len = USB_BDRING_LEN;
442 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
443 ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
444 if (ep->rxbuffer == NULL) {
445 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
451 ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
452 if (ep->rxbuf_d == DMA_ADDR_INVALID) {
453 ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
459 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
465 size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
467 tmp = (u32)(((tmp >> 2) << 2) + 4);
469 for (i = 0; i < bdring_len - 1; i++) {
470 out_be32(&bd->buf, tmp);
471 out_be32((u32 __iomem *)bd, (R_E | R_I));
475 out_be32(&bd->buf, tmp);
476 out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
481 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
483 struct qe_ep *ep = &udc->eps[pipe_num];
484 struct usb_ep_para __iomem *epparam;
489 epparam = udc->ep_param[pipe_num];
492 logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
493 usep |= (logepnum << USB_EPNUM_SHIFT);
495 switch (ep->desc->bmAttributes & 0x03) {
496 case USB_ENDPOINT_XFER_BULK:
497 usep |= USB_TRANS_BULK;
499 case USB_ENDPOINT_XFER_ISOC:
500 usep |= USB_TRANS_ISO;
502 case USB_ENDPOINT_XFER_INT:
503 usep |= USB_TRANS_INT;
506 usep |= USB_TRANS_CTR;
512 usep |= USB_THS_IGNORE_IN;
515 usep |= USB_RHS_IGNORE_OUT;
520 out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
523 out_8(&epparam->rbmr, rtfcr);
524 out_8(&epparam->tbmr, rtfcr);
526 tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
527 /* MRBLR must be divisble by 4 */
528 tmp = (u16)(((tmp >> 2) << 2) + 4);
529 out_be16(&epparam->mrblr, tmp);
534 static int qe_ep_init(struct qe_udc *udc,
535 unsigned char pipe_num,
536 const struct usb_endpoint_descriptor *desc)
538 struct qe_ep *ep = &udc->eps[pipe_num];
543 max = usb_endpoint_maxp(desc);
545 /* check the max package size validate for this endpoint */
546 /* Refer to USB2.0 spec table 9-13,
549 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
550 case USB_ENDPOINT_XFER_BULK:
551 if (strstr(ep->ep.name, "-iso")
552 || strstr(ep->ep.name, "-int"))
554 switch (udc->gadget.speed) {
556 if ((max == 128) || (max == 256) || (max == 512))
572 case USB_ENDPOINT_XFER_INT:
573 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
575 switch (udc->gadget.speed) {
588 case USB_ENDPOINT_XFER_ISOC:
589 if (strstr(ep->ep.name, "-bulk")
590 || strstr(ep->ep.name, "-int"))
592 switch (udc->gadget.speed) {
603 case USB_ENDPOINT_XFER_CONTROL:
604 if (strstr(ep->ep.name, "-iso")
605 || strstr(ep->ep.name, "-int"))
607 switch (udc->gadget.speed) {
642 spin_lock_irqsave(&udc->lock, flags);
644 /* initialize ep structure */
645 ep->ep.maxpacket = max;
646 ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
652 ep->dir = USB_DIR_BOTH;
653 udc->ep0_dir = USB_DIR_OUT;
654 udc->ep0_state = WAIT_FOR_SETUP;
656 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
658 ep->dir = USB_DIR_OUT;
661 ep->dir = USB_DIR_IN;
667 /* hardware special operation */
668 qe_ep_bd_init(udc, pipe_num);
669 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
670 reval = qe_ep_rxbd_update(ep);
675 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
676 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
677 if (ep->txframe == NULL) {
678 dev_err(udc->dev, "malloc txframe failed\n");
681 qe_frame_init(ep->txframe);
684 qe_ep_register_init(udc, pipe_num);
686 /* Now HW will be NAKing transfers to that EP,
687 * until a buffer is queued to it. */
688 spin_unlock_irqrestore(&udc->lock, flags);
695 spin_unlock_irqrestore(&udc->lock, flags);
697 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
701 static inline void qe_usb_enable(void)
703 setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
706 static inline void qe_usb_disable(void)
708 clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
711 /*----------------------------------------------------------------------------*
712 * USB and EP basic manipulate function end *
713 *----------------------------------------------------------------------------*/
716 /******************************************************************************
717 UDC transmit and receive process
718 ******************************************************************************/
719 static void recycle_one_rxbd(struct qe_ep *ep)
723 bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
724 bdstatus = R_I | R_E | (bdstatus & R_W);
725 out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
728 ep->e_rxbd = ep->rxbase;
733 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
736 struct qe_bd __iomem *bd, *nextbd;
737 unsigned char stop = 0;
741 bdstatus = in_be32((u32 __iomem *)bd);
743 while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
744 bdstatus = R_E | R_I | (bdstatus & R_W);
745 out_be32((u32 __iomem *)bd, bdstatus);
752 bdstatus = in_be32((u32 __iomem *)bd);
753 if (stopatnext && (bd == nextbd))
760 static void ep_recycle_rxbds(struct qe_ep *ep)
762 struct qe_bd __iomem *bd = ep->n_rxbd;
764 u8 epnum = ep->epnum;
765 struct qe_udc *udc = ep->udc;
767 bdstatus = in_be32((u32 __iomem *)bd);
768 if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
770 ((in_be16(&udc->ep_param[epnum]->rbptr) -
771 in_be16(&udc->ep_param[epnum]->rbase))
773 bdstatus = in_be32((u32 __iomem *)bd);
781 recycle_rxbds(ep, 0);
782 ep->e_rxbd = ep->n_rxbd;
784 recycle_rxbds(ep, 1);
786 if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
787 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
789 if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
795 static void setup_received_handle(struct qe_udc *udc,
796 struct usb_ctrlrequest *setup);
797 static int qe_ep_rxframe_handle(struct qe_ep *ep);
798 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
799 /* when BD PID is setup, handle the packet */
800 static int ep0_setup_handle(struct qe_udc *udc)
802 struct qe_ep *ep = &udc->eps[0];
803 struct qe_frame *pframe;
807 pframe = ep->rxframe;
808 if ((frame_get_info(pframe) & PID_SETUP)
809 && (udc->ep0_state == WAIT_FOR_SETUP)) {
810 fsize = frame_get_length(pframe);
811 if (unlikely(fsize != 8))
813 cp = (u8 *)&udc->local_setup_buff;
814 memcpy(cp, pframe->data, fsize);
817 /* handle the usb command base on the usb_ctrlrequest */
818 setup_received_handle(udc, &udc->local_setup_buff);
824 static int qe_ep0_rx(struct qe_udc *udc)
826 struct qe_ep *ep = &udc->eps[0];
827 struct qe_frame *pframe;
828 struct qe_bd __iomem *bd;
829 u32 bdstatus, length;
832 pframe = ep->rxframe;
834 if (ep->dir == USB_DIR_IN) {
835 dev_err(udc->dev, "ep0 not a control endpoint\n");
840 bdstatus = in_be32((u32 __iomem *)bd);
841 length = bdstatus & BD_LENGTH_MASK;
843 while (!(bdstatus & R_E) && length) {
844 if ((bdstatus & R_F) && (bdstatus & R_L)
845 && !(bdstatus & R_ERROR)) {
846 if (length == USB_CRC_SIZE) {
847 udc->ep0_state = WAIT_FOR_SETUP;
849 "receive a ZLP in status phase\n");
851 qe_frame_clean(pframe);
852 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
853 frame_set_data(pframe, (u8 *)vaddr);
854 frame_set_length(pframe,
855 (length - USB_CRC_SIZE));
856 frame_set_status(pframe, FRAME_OK);
857 switch (bdstatus & R_PID) {
859 frame_set_info(pframe, PID_SETUP);
862 frame_set_info(pframe, PID_DATA1);
865 frame_set_info(pframe, PID_DATA0);
869 if ((bdstatus & R_PID) == R_PID_SETUP)
870 ep0_setup_handle(udc);
872 qe_ep_rxframe_handle(ep);
875 dev_err(udc->dev, "The receive frame with error!\n");
878 /* note: don't clear the rxbd's buffer address */
879 recycle_one_rxbd(ep);
887 bdstatus = in_be32((u32 __iomem *)bd);
888 length = bdstatus & BD_LENGTH_MASK;
897 static int qe_ep_rxframe_handle(struct qe_ep *ep)
899 struct qe_frame *pframe;
905 pframe = ep->rxframe;
907 if (frame_get_info(pframe) & PID_DATA1)
910 if (framepid != ep->data01) {
911 dev_err(ep->udc->dev, "the data01 error!\n");
915 fsize = frame_get_length(pframe);
916 if (list_empty(&ep->queue)) {
917 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
919 req = list_entry(ep->queue.next, struct qe_req, queue);
921 cp = (u8 *)(req->req.buf) + req->req.actual;
923 memcpy(cp, pframe->data, fsize);
924 req->req.actual += fsize;
925 if ((fsize < ep->ep.maxpacket) ||
926 (req->req.actual >= req->req.length)) {
928 ep0_req_complete(ep->udc, req);
931 if (list_empty(&ep->queue) && ep->epnum != 0)
937 qe_ep_toggledata01(ep);
942 static void ep_rx_tasklet(unsigned long data)
944 struct qe_udc *udc = (struct qe_udc *)data;
946 struct qe_frame *pframe;
947 struct qe_bd __iomem *bd;
949 u32 bdstatus, length;
952 spin_lock_irqsave(&udc->lock, flags);
954 for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
957 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
959 "This is a transmit ep or disable tasklet!\n");
963 pframe = ep->rxframe;
965 bdstatus = in_be32((u32 __iomem *)bd);
966 length = bdstatus & BD_LENGTH_MASK;
968 while (!(bdstatus & R_E) && length) {
969 if (list_empty(&ep->queue)) {
972 "The rxep have noreq %d\n",
977 if ((bdstatus & R_F) && (bdstatus & R_L)
978 && !(bdstatus & R_ERROR)) {
979 qe_frame_clean(pframe);
980 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
981 frame_set_data(pframe, (u8 *)vaddr);
982 frame_set_length(pframe,
983 (length - USB_CRC_SIZE));
984 frame_set_status(pframe, FRAME_OK);
985 switch (bdstatus & R_PID) {
987 frame_set_info(pframe, PID_DATA1);
990 frame_set_info(pframe, PID_SETUP);
993 frame_set_info(pframe, PID_DATA0);
996 /* handle the rx frame */
997 qe_ep_rxframe_handle(ep);
1000 "error in received frame\n");
1002 /* note: don't clear the rxbd's buffer address */
1003 /*clear the length */
1004 out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1006 if (!(ep->localnack))
1007 recycle_one_rxbd(ep);
1015 bdstatus = in_be32((u32 __iomem *)bd);
1016 length = bdstatus & BD_LENGTH_MASK;
1022 ep_recycle_rxbds(ep);
1024 ep->enable_tasklet = 0;
1027 spin_unlock_irqrestore(&udc->lock, flags);
1030 static int qe_ep_rx(struct qe_ep *ep)
1033 struct qe_frame *pframe;
1034 struct qe_bd __iomem *bd;
1035 u16 swoffs, ucoffs, emptybds;
1038 pframe = ep->rxframe;
1040 if (ep->dir == USB_DIR_IN) {
1041 dev_err(udc->dev, "transmit ep in rx function\n");
1047 swoffs = (u16)(bd - ep->rxbase);
1048 ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1049 in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1050 if (swoffs < ucoffs)
1051 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1053 emptybds = swoffs - ucoffs;
1055 if (emptybds < MIN_EMPTY_BDS) {
1058 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1060 ep->has_data = USB_BDRING_LEN_RX - emptybds;
1062 if (list_empty(&ep->queue)) {
1064 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1069 tasklet_schedule(&udc->rx_tasklet);
1070 ep->enable_tasklet = 1;
1075 /* send data from a frame, no matter what tx_req */
1076 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1078 struct qe_udc *udc = ep->udc;
1079 struct qe_bd __iomem *bd;
1081 u32 bdstatus, pidmask;
1084 if (ep->dir == USB_DIR_OUT) {
1085 dev_err(udc->dev, "receive ep passed to tx function\n");
1089 /* Disable the Tx interrupt */
1090 saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1091 out_be16(&udc->usb_regs->usb_usbmr,
1092 saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1095 bdstatus = in_be32((u32 __iomem *)bd);
1097 if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1098 if (frame_get_length(frame) == 0) {
1099 frame_set_data(frame, udc->nullbuf);
1100 frame_set_length(frame, 2);
1101 frame->info |= (ZLP | NO_CRC);
1102 dev_vdbg(udc->dev, "the frame size = 0\n");
1104 paddr = virt_to_phys((void *)frame->data);
1105 out_be32(&bd->buf, paddr);
1106 bdstatus = (bdstatus&T_W);
1107 if (!(frame_get_info(frame) & NO_CRC))
1108 bdstatus |= T_R | T_I | T_L | T_TC
1109 | frame_get_length(frame);
1111 bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1113 /* if the packet is a ZLP in status phase */
1114 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1118 pidmask = T_PID_DATA1;
1119 frame->info |= PID_DATA1;
1121 pidmask = T_PID_DATA0;
1122 frame->info |= PID_DATA0;
1125 bdstatus |= pidmask;
1126 out_be32((u32 __iomem *)bd, bdstatus);
1127 qe_ep_filltxfifo(ep);
1129 /* enable the TX interrupt */
1130 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1132 qe_ep_toggledata01(ep);
1134 ep->n_txbd = ep->txbase;
1140 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1141 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1146 /* when a bd was transmitted, the function can
1147 * handle the tx_req, not include ep0 */
1148 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1150 if (ep->tx_req != NULL) {
1151 struct qe_req *req = ep->tx_req;
1152 unsigned zlp = 0, last_len = 0;
1154 last_len = min_t(unsigned, req->req.length - ep->sent,
1158 int asent = ep->last;
1165 /* zlp needed when req->re.zero is set */
1166 if (req->req.zero) {
1167 if (last_len == 0 ||
1168 (req->req.length % ep->ep.maxpacket) != 0)
1175 /* a request already were transmitted completely */
1176 if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) {
1177 done(ep, ep->tx_req, 0);
1184 /* we should gain a new tx_req fot this endpoint */
1185 if (ep->tx_req == NULL) {
1186 if (!list_empty(&ep->queue)) {
1187 ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1197 /* give a frame and a tx_req, send some data */
1198 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1203 qe_frame_clean(frame);
1204 size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1206 buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1209 ep->tx_req->req.actual += size;
1210 frame_set_data(frame, buf);
1211 frame_set_length(frame, size);
1212 frame_set_status(frame, FRAME_OK);
1213 frame_set_info(frame, 0);
1214 return qe_ep_tx(ep, frame);
1219 /* give a frame struct,send a ZLP */
1220 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1222 struct qe_udc *udc = ep->udc;
1227 qe_frame_clean(frame);
1228 frame_set_data(frame, (u8 *)udc->nullbuf);
1229 frame_set_length(frame, 2);
1230 frame_set_status(frame, FRAME_OK);
1231 frame_set_info(frame, (ZLP | NO_CRC | infor));
1233 return qe_ep_tx(ep, frame);
1236 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1238 struct qe_req *req = ep->tx_req;
1244 if ((req->req.length - ep->sent) > 0)
1245 reval = qe_usb_senddata(ep, frame);
1247 reval = sendnulldata(ep, frame, 0);
1252 /* if direction is DIR_IN, the status is Device->Host
1253 * if direction is DIR_OUT, the status transaction is Device<-Host
1254 * in status phase, udc create a request and gain status */
1255 static int ep0_prime_status(struct qe_udc *udc, int direction)
1258 struct qe_ep *ep = &udc->eps[0];
1260 if (direction == USB_DIR_IN) {
1261 udc->ep0_state = DATA_STATE_NEED_ZLP;
1262 udc->ep0_dir = USB_DIR_IN;
1263 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1265 udc->ep0_dir = USB_DIR_OUT;
1266 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1272 /* a request complete in ep0, whether gadget request or udc request */
1273 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1275 struct qe_ep *ep = &udc->eps[0];
1276 /* because usb and ep's status already been set in ch9setaddress() */
1278 switch (udc->ep0_state) {
1279 case DATA_STATE_XMIT:
1281 /* receive status phase */
1282 if (ep0_prime_status(udc, USB_DIR_OUT))
1286 case DATA_STATE_NEED_ZLP:
1288 udc->ep0_state = WAIT_FOR_SETUP;
1291 case DATA_STATE_RECV:
1293 /* send status phase */
1294 if (ep0_prime_status(udc, USB_DIR_IN))
1298 case WAIT_FOR_OUT_STATUS:
1300 udc->ep0_state = WAIT_FOR_SETUP;
1303 case WAIT_FOR_SETUP:
1304 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1313 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1315 struct qe_req *tx_req = NULL;
1316 struct qe_frame *frame = ep->txframe;
1318 if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1320 ep->udc->ep0_state = WAIT_FOR_SETUP;
1322 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1326 tx_req = ep->tx_req;
1327 if (tx_req != NULL) {
1329 int asent = ep->last;
1336 /* a request already were transmitted completely */
1337 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1338 ep->tx_req->req.actual = (unsigned int)ep->sent;
1339 ep0_req_complete(ep->udc, ep->tx_req);
1345 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1351 static int ep0_txframe_handle(struct qe_ep *ep)
1353 /* if have error, transmit again */
1354 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1355 qe_ep_flushtxfifo(ep);
1356 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1357 if (frame_get_info(ep->txframe) & PID_DATA0)
1362 ep0_txcomplete(ep, 1);
1364 ep0_txcomplete(ep, 0);
1366 frame_create_tx(ep, ep->txframe);
1370 static int qe_ep0_txconf(struct qe_ep *ep)
1372 struct qe_bd __iomem *bd;
1373 struct qe_frame *pframe;
1377 bdstatus = in_be32((u32 __iomem *)bd);
1378 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1379 pframe = ep->txframe;
1381 /* clear and recycle the BD */
1382 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1383 out_be32(&bd->buf, 0);
1385 ep->c_txbd = ep->txbase;
1389 if (ep->c_txbd == ep->n_txbd) {
1390 if (bdstatus & DEVICE_T_ERROR) {
1391 frame_set_status(pframe, FRAME_ERROR);
1392 if (bdstatus & T_TO)
1393 pframe->status |= TX_ER_TIMEOUT;
1394 if (bdstatus & T_UN)
1395 pframe->status |= TX_ER_UNDERUN;
1397 ep0_txframe_handle(ep);
1401 bdstatus = in_be32((u32 __iomem *)bd);
1407 static int ep_txframe_handle(struct qe_ep *ep)
1409 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1410 qe_ep_flushtxfifo(ep);
1411 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1412 if (frame_get_info(ep->txframe) & PID_DATA0)
1421 frame_create_tx(ep, ep->txframe); /* send the data */
1425 /* confirm the already trainsmited bd */
1426 static int qe_ep_txconf(struct qe_ep *ep)
1428 struct qe_bd __iomem *bd;
1429 struct qe_frame *pframe = NULL;
1431 unsigned char breakonrxinterrupt = 0;
1434 bdstatus = in_be32((u32 __iomem *)bd);
1435 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1436 pframe = ep->txframe;
1437 if (bdstatus & DEVICE_T_ERROR) {
1438 frame_set_status(pframe, FRAME_ERROR);
1439 if (bdstatus & T_TO)
1440 pframe->status |= TX_ER_TIMEOUT;
1441 if (bdstatus & T_UN)
1442 pframe->status |= TX_ER_UNDERUN;
1445 /* clear and recycle the BD */
1446 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1447 out_be32(&bd->buf, 0);
1449 ep->c_txbd = ep->txbase;
1453 /* handle the tx frame */
1454 ep_txframe_handle(ep);
1456 bdstatus = in_be32((u32 __iomem *)bd);
1458 if (breakonrxinterrupt)
1464 /* Add a request in queue, and try to transmit a packet */
1465 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1469 if (ep->tx_req == NULL) {
1472 txcomplete(ep, 0); /* can gain a new tx_req */
1473 reval = frame_create_tx(ep, ep->txframe);
1478 /* Maybe this is a good ideal */
1479 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1481 struct qe_udc *udc = ep->udc;
1482 struct qe_frame *pframe = NULL;
1483 struct qe_bd __iomem *bd;
1484 u32 bdstatus, length;
1490 if (list_empty(&ep->queue)) {
1491 dev_vdbg(udc->dev, "the req already finish!\n");
1494 pframe = ep->rxframe;
1497 bdstatus = in_be32((u32 __iomem *)bd);
1498 length = bdstatus & BD_LENGTH_MASK;
1500 while (!(bdstatus & R_E) && length) {
1503 if ((bdstatus & R_F) && (bdstatus & R_L)
1504 && !(bdstatus & R_ERROR)) {
1505 qe_frame_clean(pframe);
1506 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1507 frame_set_data(pframe, (u8 *)vaddr);
1508 frame_set_length(pframe, (length - USB_CRC_SIZE));
1509 frame_set_status(pframe, FRAME_OK);
1510 switch (bdstatus & R_PID) {
1512 frame_set_info(pframe, PID_DATA1); break;
1514 frame_set_info(pframe, PID_DATA0); break;
1516 /* handle the rx frame */
1518 if (frame_get_info(pframe) & PID_DATA1)
1523 if (framepid != ep->data01) {
1524 dev_vdbg(udc->dev, "the data01 error!\n");
1526 fsize = frame_get_length(pframe);
1528 cp = (u8 *)(req->req.buf) + req->req.actual;
1530 memcpy(cp, pframe->data, fsize);
1531 req->req.actual += fsize;
1532 if ((fsize < ep->ep.maxpacket)
1533 || (req->req.actual >=
1537 if (list_empty(&ep->queue))
1541 qe_ep_toggledata01(ep);
1544 dev_err(udc->dev, "The receive frame with error!\n");
1547 /* note: don't clear the rxbd's buffer address *
1548 * only Clear the length */
1549 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1558 bdstatus = in_be32((u32 __iomem *)bd);
1559 length = bdstatus & BD_LENGTH_MASK;
1563 ep_recycle_rxbds(ep);
1568 /* only add the request in queue */
1569 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1571 if (ep->state == EP_STATE_NACK) {
1572 if (ep->has_data <= 0) {
1573 /* Enable rx and unmask rx interrupt */
1576 /* Copy the exist BD data */
1584 /********************************************************************
1585 Internal Used Function End
1586 ********************************************************************/
1588 /*-----------------------------------------------------------------------
1589 Endpoint Management Functions For Gadget
1590 -----------------------------------------------------------------------*/
1591 static int qe_ep_enable(struct usb_ep *_ep,
1592 const struct usb_endpoint_descriptor *desc)
1597 unsigned char epnum;
1599 ep = container_of(_ep, struct qe_ep, ep);
1601 /* catch various bogus parameters */
1602 if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
1603 (desc->bDescriptorType != USB_DT_ENDPOINT))
1607 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1610 epnum = (u8)desc->bEndpointAddress & 0xF;
1612 retval = qe_ep_init(udc, epnum, desc);
1614 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1615 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1618 dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1622 static int qe_ep_disable(struct usb_ep *_ep)
1626 unsigned long flags;
1629 ep = container_of(_ep, struct qe_ep, ep);
1632 if (!_ep || !ep->desc) {
1633 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1637 spin_lock_irqsave(&udc->lock, flags);
1638 /* Nuke all pending requests (does flush) */
1639 nuke(ep, -ESHUTDOWN);
1644 qe_ep_reset(udc, ep->epnum);
1645 spin_unlock_irqrestore(&udc->lock, flags);
1647 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1649 if (ep->dir == USB_DIR_OUT)
1650 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1651 (USB_BDRING_LEN_RX + 1);
1653 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1654 (USB_BDRING_LEN + 1);
1656 if (ep->dir != USB_DIR_IN) {
1659 dma_unmap_single(udc_controller->gadget.dev.parent,
1662 ep->rxbuf_d = DMA_ADDR_INVALID;
1664 dma_sync_single_for_cpu(
1665 udc_controller->gadget.dev.parent,
1669 kfree(ep->rxbuffer);
1672 if (ep->dir != USB_DIR_OUT)
1675 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1679 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1683 req = kzalloc(sizeof(*req), gfp_flags);
1687 req->req.dma = DMA_ADDR_INVALID;
1689 INIT_LIST_HEAD(&req->queue);
1694 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1698 req = container_of(_req, struct qe_req, req);
1704 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
1706 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1707 struct qe_req *req = container_of(_req, struct qe_req, req);
1712 /* catch various bogus parameters */
1713 if (!_req || !req->req.complete || !req->req.buf
1714 || !list_empty(&req->queue)) {
1715 dev_dbg(udc->dev, "bad params\n");
1718 if (!_ep || (!ep->desc && ep_index(ep))) {
1719 dev_dbg(udc->dev, "bad ep\n");
1723 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1728 /* map virtual address to hardware */
1729 if (req->req.dma == DMA_ADDR_INVALID) {
1730 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1738 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1739 req->req.dma, req->req.length,
1746 req->req.status = -EINPROGRESS;
1747 req->req.actual = 0;
1749 list_add_tail(&req->queue, &ep->queue);
1750 dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1751 ep->name, req->req.length);
1753 /* push the request to device */
1755 reval = ep_req_send(ep, req);
1758 if (ep_index(ep) == 0 && req->req.length > 0) {
1760 udc->ep0_state = DATA_STATE_XMIT;
1762 udc->ep0_state = DATA_STATE_RECV;
1765 if (ep->dir == USB_DIR_OUT)
1766 reval = ep_req_receive(ep, req);
1771 /* queues (submits) an I/O request to an endpoint */
1772 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1775 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1776 struct qe_udc *udc = ep->udc;
1777 unsigned long flags;
1780 spin_lock_irqsave(&udc->lock, flags);
1781 ret = __qe_ep_queue(_ep, _req);
1782 spin_unlock_irqrestore(&udc->lock, flags);
1786 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1787 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1789 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1791 unsigned long flags;
1796 spin_lock_irqsave(&ep->udc->lock, flags);
1798 /* make sure it's actually queued on this endpoint */
1799 list_for_each_entry(req, &ep->queue, queue) {
1800 if (&req->req == _req)
1804 if (&req->req != _req) {
1805 spin_unlock_irqrestore(&ep->udc->lock, flags);
1809 done(ep, req, -ECONNRESET);
1811 spin_unlock_irqrestore(&ep->udc->lock, flags);
1815 /*-----------------------------------------------------------------
1816 * modify the endpoint halt feature
1817 * @ep: the non-isochronous endpoint being stalled
1818 * @value: 1--set halt 0--clear halt
1819 * Returns zero, or a negative error code.
1820 *----------------------------------------------------------------*/
1821 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1824 unsigned long flags;
1825 int status = -EOPNOTSUPP;
1828 ep = container_of(_ep, struct qe_ep, ep);
1829 if (!_ep || !ep->desc) {
1835 /* Attempt to halt IN ep will fail if any transfer requests
1836 * are still queue */
1837 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1843 spin_lock_irqsave(&ep->udc->lock, flags);
1844 qe_eptx_stall_change(ep, value);
1845 qe_eprx_stall_change(ep, value);
1846 spin_unlock_irqrestore(&ep->udc->lock, flags);
1848 if (ep->epnum == 0) {
1849 udc->ep0_state = WAIT_FOR_SETUP;
1853 /* set data toggle to DATA0 on clear halt */
1857 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1858 value ? "set" : "clear", status);
1863 static struct usb_ep_ops qe_ep_ops = {
1864 .enable = qe_ep_enable,
1865 .disable = qe_ep_disable,
1867 .alloc_request = qe_alloc_request,
1868 .free_request = qe_free_request,
1870 .queue = qe_ep_queue,
1871 .dequeue = qe_ep_dequeue,
1873 .set_halt = qe_ep_set_halt,
1876 /*------------------------------------------------------------------------
1877 Gadget Driver Layer Operations
1878 ------------------------------------------------------------------------*/
1880 /* Get the current frame number */
1881 static int qe_get_frame(struct usb_gadget *gadget)
1885 tmp = in_be16(&udc_controller->usb_param->frame_n);
1894 /* Tries to wake up the host connected to this gadget
1896 * Return : 0-success
1897 * Negative-this feature not enabled by host or not supported by device hw
1899 static int qe_wakeup(struct usb_gadget *gadget)
1904 /* Notify controller that VBUS is powered, Called by whatever
1905 detects VBUS sessions */
1906 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1911 /* constrain controller's VBUS power usage
1912 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1913 * reporting how much power the device may consume. For example, this
1914 * could affect how quickly batteries are recharged.
1916 * Returns zero on success, else negative errno.
1918 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1923 /* Change Data+ pullup status
1924 * this func is used by usb_gadget_connect/disconnect
1926 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1931 static int fsl_qe_start(struct usb_gadget_driver *driver,
1932 int (*bind)(struct usb_gadget *));
1933 static int fsl_qe_stop(struct usb_gadget_driver *driver);
1935 /* defined in usb_gadget.h */
1936 static struct usb_gadget_ops qe_gadget_ops = {
1937 .get_frame = qe_get_frame,
1938 .wakeup = qe_wakeup,
1939 /* .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1940 .vbus_session = qe_vbus_session,
1941 .vbus_draw = qe_vbus_draw,
1942 .pullup = qe_pullup,
1943 .start = fsl_qe_start,
1944 .stop = fsl_qe_stop,
1947 /*-------------------------------------------------------------------------
1948 USB ep0 Setup process in BUS Enumeration
1949 -------------------------------------------------------------------------*/
1950 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1952 struct qe_ep *ep = &udc->eps[pipe];
1954 nuke(ep, -ECONNRESET);
1959 static int reset_queues(struct qe_udc *udc)
1963 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1964 udc_reset_ep_queue(udc, pipe);
1966 /* report disconnect; the driver is already quiesced */
1967 spin_unlock(&udc->lock);
1968 udc->driver->disconnect(&udc->gadget);
1969 spin_lock(&udc->lock);
1974 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1977 /* Save the new address to device struct */
1978 udc->device_address = (u8) value;
1979 /* Update usb state */
1980 udc->usb_state = USB_STATE_ADDRESS;
1982 /* Status phase , send a ZLP */
1983 if (ep0_prime_status(udc, USB_DIR_IN))
1987 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1989 struct qe_req *req = container_of(_req, struct qe_req, req);
1991 req->req.buf = NULL;
1995 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1996 u16 index, u16 length)
2004 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
2005 /* Get device status */
2006 usb_status = 1 << USB_DEVICE_SELF_POWERED;
2007 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
2008 /* Get interface status */
2009 /* We don't have interface information in udc driver */
2011 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
2012 /* Get endpoint status */
2013 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
2014 struct qe_ep *target_ep = &udc->eps[pipe];
2017 /* stall if endpoint doesn't exist */
2018 if (!target_ep->desc)
2021 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
2022 if (index & USB_DIR_IN) {
2023 if (target_ep->dir != USB_DIR_IN)
2025 if ((usep & USB_THS_MASK) == USB_THS_STALL)
2026 usb_status = 1 << USB_ENDPOINT_HALT;
2028 if (target_ep->dir != USB_DIR_OUT)
2030 if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
2031 usb_status = 1 << USB_ENDPOINT_HALT;
2035 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2036 struct qe_req, req);
2037 req->req.length = 2;
2038 req->req.buf = udc->statusbuf;
2039 *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2040 req->req.status = -EINPROGRESS;
2041 req->req.actual = 0;
2042 req->req.complete = ownercomplete;
2044 udc->ep0_dir = USB_DIR_IN;
2047 status = __qe_ep_queue(&ep->ep, &req->req);
2052 dev_err(udc->dev, "Can't respond to getstatus request \n");
2056 /* only handle the setup request, suppose the device in normal status */
2057 static void setup_received_handle(struct qe_udc *udc,
2058 struct usb_ctrlrequest *setup)
2060 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2061 u16 wValue = le16_to_cpu(setup->wValue);
2062 u16 wIndex = le16_to_cpu(setup->wIndex);
2063 u16 wLength = le16_to_cpu(setup->wLength);
2065 /* clear the previous request in the ep0 */
2066 udc_reset_ep_queue(udc, 0);
2068 if (setup->bRequestType & USB_DIR_IN)
2069 udc->ep0_dir = USB_DIR_IN;
2071 udc->ep0_dir = USB_DIR_OUT;
2073 switch (setup->bRequest) {
2074 case USB_REQ_GET_STATUS:
2075 /* Data+Status phase form udc */
2076 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2077 != (USB_DIR_IN | USB_TYPE_STANDARD))
2079 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2083 case USB_REQ_SET_ADDRESS:
2084 /* Status phase from udc */
2085 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2088 ch9setaddress(udc, wValue, wIndex, wLength);
2091 case USB_REQ_CLEAR_FEATURE:
2092 case USB_REQ_SET_FEATURE:
2093 /* Requests with no data phase, status phase from udc */
2094 if ((setup->bRequestType & USB_TYPE_MASK)
2095 != USB_TYPE_STANDARD)
2098 if ((setup->bRequestType & USB_RECIP_MASK)
2099 == USB_RECIP_ENDPOINT) {
2100 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2103 if (wValue != 0 || wLength != 0
2104 || pipe > USB_MAX_ENDPOINTS)
2106 ep = &udc->eps[pipe];
2108 spin_unlock(&udc->lock);
2109 qe_ep_set_halt(&ep->ep,
2110 (setup->bRequest == USB_REQ_SET_FEATURE)
2112 spin_lock(&udc->lock);
2115 ep0_prime_status(udc, USB_DIR_IN);
2124 /* Data phase from gadget, status phase from udc */
2125 if (setup->bRequestType & USB_DIR_IN) {
2126 udc->ep0_state = DATA_STATE_XMIT;
2127 udc->ep0_dir = USB_DIR_IN;
2129 udc->ep0_state = DATA_STATE_RECV;
2130 udc->ep0_dir = USB_DIR_OUT;
2132 spin_unlock(&udc->lock);
2133 if (udc->driver->setup(&udc->gadget,
2134 &udc->local_setup_buff) < 0)
2136 spin_lock(&udc->lock);
2138 /* No data phase, IN status from gadget */
2139 udc->ep0_dir = USB_DIR_IN;
2140 spin_unlock(&udc->lock);
2141 if (udc->driver->setup(&udc->gadget,
2142 &udc->local_setup_buff) < 0)
2144 spin_lock(&udc->lock);
2145 udc->ep0_state = DATA_STATE_NEED_ZLP;
2149 /*-------------------------------------------------------------------------
2150 USB Interrupt handlers
2151 -------------------------------------------------------------------------*/
2152 static void suspend_irq(struct qe_udc *udc)
2154 udc->resume_state = udc->usb_state;
2155 udc->usb_state = USB_STATE_SUSPENDED;
2157 /* report suspend to the driver ,serial.c not support this*/
2158 if (udc->driver->suspend)
2159 udc->driver->suspend(&udc->gadget);
2162 static void resume_irq(struct qe_udc *udc)
2164 udc->usb_state = udc->resume_state;
2165 udc->resume_state = 0;
2167 /* report resume to the driver , serial.c not support this*/
2168 if (udc->driver->resume)
2169 udc->driver->resume(&udc->gadget);
2172 static void idle_irq(struct qe_udc *udc)
2176 usbs = in_8(&udc->usb_regs->usb_usbs);
2177 if (usbs & USB_IDLE_STATUS_MASK) {
2178 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2181 if (udc->usb_state == USB_STATE_SUSPENDED)
2186 static int reset_irq(struct qe_udc *udc)
2190 if (udc->usb_state == USB_STATE_DEFAULT)
2194 out_8(&udc->usb_regs->usb_usadr, 0);
2196 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2197 if (udc->eps[i].init)
2198 qe_ep_reset(udc, i);
2202 udc->usb_state = USB_STATE_DEFAULT;
2203 udc->ep0_state = WAIT_FOR_SETUP;
2204 udc->ep0_dir = USB_DIR_OUT;
2209 static int bsy_irq(struct qe_udc *udc)
2214 static int txe_irq(struct qe_udc *udc)
2219 /* ep0 tx interrupt also in here */
2220 static int tx_irq(struct qe_udc *udc)
2223 struct qe_bd __iomem *bd;
2226 if ((udc->usb_state == USB_STATE_ADDRESS)
2227 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2228 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2230 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2232 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2234 if (!(in_be32((u32 __iomem *)bd) & T_R)
2235 && (in_be32(&bd->buf))) {
2236 /* confirm the transmitted bd */
2238 res = qe_ep0_txconf(ep);
2240 res = qe_ep_txconf(ep);
2248 /* setup packect's rx is handle in the function too */
2249 static void rx_irq(struct qe_udc *udc)
2252 struct qe_bd __iomem *bd;
2255 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2257 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2259 if (!(in_be32((u32 __iomem *)bd) & R_E)
2260 && (in_be32(&bd->buf))) {
2261 if (ep->epnum == 0) {
2264 /*non-setup package receive*/
2272 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2274 struct qe_udc *udc = (struct qe_udc *)_udc;
2276 irqreturn_t status = IRQ_NONE;
2277 unsigned long flags;
2279 spin_lock_irqsave(&udc->lock, flags);
2281 irq_src = in_be16(&udc->usb_regs->usb_usber) &
2282 in_be16(&udc->usb_regs->usb_usbmr);
2283 /* Clear notification bits */
2284 out_be16(&udc->usb_regs->usb_usber, irq_src);
2286 if (irq_src & USB_E_IDLE_MASK) {
2288 irq_src &= ~USB_E_IDLE_MASK;
2289 status = IRQ_HANDLED;
2292 if (irq_src & USB_E_TXB_MASK) {
2294 irq_src &= ~USB_E_TXB_MASK;
2295 status = IRQ_HANDLED;
2298 if (irq_src & USB_E_RXB_MASK) {
2300 irq_src &= ~USB_E_RXB_MASK;
2301 status = IRQ_HANDLED;
2304 if (irq_src & USB_E_RESET_MASK) {
2306 irq_src &= ~USB_E_RESET_MASK;
2307 status = IRQ_HANDLED;
2310 if (irq_src & USB_E_BSY_MASK) {
2312 irq_src &= ~USB_E_BSY_MASK;
2313 status = IRQ_HANDLED;
2316 if (irq_src & USB_E_TXE_MASK) {
2318 irq_src &= ~USB_E_TXE_MASK;
2319 status = IRQ_HANDLED;
2322 spin_unlock_irqrestore(&udc->lock, flags);
2327 /*-------------------------------------------------------------------------
2328 Gadget driver probe and unregister.
2329 --------------------------------------------------------------------------*/
2330 static int fsl_qe_start(struct usb_gadget_driver *driver,
2331 int (*bind)(struct usb_gadget *))
2334 unsigned long flags = 0;
2336 /* standard operations */
2337 if (!udc_controller)
2340 if (!driver || driver->max_speed < USB_SPEED_FULL
2341 || !bind || !driver->disconnect || !driver->setup)
2344 if (udc_controller->driver)
2347 /* lock is needed but whether should use this lock or another */
2348 spin_lock_irqsave(&udc_controller->lock, flags);
2350 driver->driver.bus = NULL;
2351 /* hook up the driver */
2352 udc_controller->driver = driver;
2353 udc_controller->gadget.dev.driver = &driver->driver;
2354 udc_controller->gadget.speed = driver->max_speed;
2355 spin_unlock_irqrestore(&udc_controller->lock, flags);
2357 retval = bind(&udc_controller->gadget);
2359 dev_err(udc_controller->dev, "bind to %s --> %d",
2360 driver->driver.name, retval);
2361 udc_controller->gadget.dev.driver = NULL;
2362 udc_controller->driver = NULL;
2366 /* Enable IRQ reg and Set usbcmd reg EN bit */
2369 out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2370 out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2371 udc_controller->usb_state = USB_STATE_ATTACHED;
2372 udc_controller->ep0_state = WAIT_FOR_SETUP;
2373 udc_controller->ep0_dir = USB_DIR_OUT;
2374 dev_info(udc_controller->dev, "%s bind to driver %s \n",
2375 udc_controller->gadget.name, driver->driver.name);
2379 static int fsl_qe_stop(struct usb_gadget_driver *driver)
2381 struct qe_ep *loop_ep;
2382 unsigned long flags;
2384 if (!udc_controller)
2387 if (!driver || driver != udc_controller->driver)
2390 /* stop usb controller, disable intr */
2393 /* in fact, no needed */
2394 udc_controller->usb_state = USB_STATE_ATTACHED;
2395 udc_controller->ep0_state = WAIT_FOR_SETUP;
2396 udc_controller->ep0_dir = 0;
2398 /* stand operation */
2399 spin_lock_irqsave(&udc_controller->lock, flags);
2400 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2401 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2402 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2404 nuke(loop_ep, -ESHUTDOWN);
2405 spin_unlock_irqrestore(&udc_controller->lock, flags);
2407 /* report disconnect; the controller is already quiesced */
2408 driver->disconnect(&udc_controller->gadget);
2410 /* unbind gadget and unhook driver. */
2411 driver->unbind(&udc_controller->gadget);
2412 udc_controller->gadget.dev.driver = NULL;
2413 udc_controller->driver = NULL;
2415 dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2416 driver->driver.name);
2420 /* udc structure's alloc and setup, include ep-param alloc */
2421 static struct qe_udc __devinit *qe_udc_config(struct platform_device *ofdev)
2424 struct device_node *np = ofdev->dev.of_node;
2425 unsigned int tmp_addr = 0;
2426 struct usb_device_para __iomem *usbpram;
2431 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2433 dev_err(&ofdev->dev, "malloc udc failed\n");
2437 udc->dev = &ofdev->dev;
2439 /* get default address of usb parameter in MURAM from device tree */
2440 offset = *of_get_address(np, 1, &size, NULL);
2441 udc->usb_param = cpm_muram_addr(offset);
2442 memset_io(udc->usb_param, 0, size);
2444 usbpram = udc->usb_param;
2445 out_be16(&usbpram->frame_n, 0);
2446 out_be32(&usbpram->rstate, 0);
2448 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2449 sizeof(struct usb_ep_para)),
2450 USB_EP_PARA_ALIGNMENT);
2451 if (IS_ERR_VALUE(tmp_addr))
2454 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2455 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2456 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2460 memset_io(udc->ep_param[0], 0,
2461 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2463 udc->resume_state = USB_STATE_NOTATTACHED;
2464 udc->usb_state = USB_STATE_POWERED;
2467 spin_lock_init(&udc->lock);
2475 /* USB Controller register init */
2476 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2478 struct usb_ctlr __iomem *qe_usbregs;
2479 qe_usbregs = udc->usb_regs;
2481 /* Spec says that we must enable the USB controller to change mode. */
2482 out_8(&qe_usbregs->usb_usmod, 0x01);
2483 /* Mode changed, now disable it, since muram isn't initialized yet. */
2484 out_8(&qe_usbregs->usb_usmod, 0x00);
2486 /* Initialize the rest. */
2487 out_be16(&qe_usbregs->usb_usbmr, 0);
2488 out_8(&qe_usbregs->usb_uscom, 0);
2489 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2494 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2496 struct qe_ep *ep = &udc->eps[pipe_num];
2499 strcpy(ep->name, ep_name[pipe_num]);
2500 ep->ep.name = ep_name[pipe_num];
2502 ep->ep.ops = &qe_ep_ops;
2504 ep->ep.maxpacket = (unsigned short) ~0;
2507 ep->epnum = (u8)pipe_num;
2514 ep->state = EP_STATE_IDLE;
2517 /* the queue lists any req for this ep */
2518 INIT_LIST_HEAD(&ep->queue);
2520 /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2522 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2524 ep->gadget = &udc->gadget;
2529 /*-----------------------------------------------------------------------
2530 * UDC device Driver operation functions *
2531 *----------------------------------------------------------------------*/
2532 static void qe_udc_release(struct device *dev)
2536 complete(udc_controller->done);
2537 cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2538 for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2539 udc_controller->ep_param[i] = NULL;
2541 kfree(udc_controller);
2542 udc_controller = NULL;
2545 /* Driver probe functions */
2546 static const struct of_device_id qe_udc_match[];
2547 static int __devinit qe_udc_probe(struct platform_device *ofdev)
2549 const struct of_device_id *match;
2550 struct device_node *np = ofdev->dev.of_node;
2552 unsigned int ret = 0;
2556 match = of_match_device(qe_udc_match, &ofdev->dev);
2560 prop = of_get_property(np, "mode", NULL);
2561 if (!prop || strcmp(prop, "peripheral"))
2564 /* Initialize the udc structure including QH member and other member */
2565 udc_controller = qe_udc_config(ofdev);
2566 if (!udc_controller) {
2567 dev_err(&ofdev->dev, "failed to initialize\n");
2571 udc_controller->soc_type = (unsigned long)match->data;
2572 udc_controller->usb_regs = of_iomap(np, 0);
2573 if (!udc_controller->usb_regs) {
2578 /* initialize usb hw reg except for regs for EP,
2579 * leave usbintr reg untouched*/
2580 qe_udc_reg_init(udc_controller);
2582 /* here comes the stand operations for probe
2583 * set the qe_udc->gadget.xxx */
2584 udc_controller->gadget.ops = &qe_gadget_ops;
2586 /* gadget.ep0 is a pointer */
2587 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2589 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2591 /* modify in register gadget process */
2592 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2594 /* name: Identifies the controller hardware type. */
2595 udc_controller->gadget.name = driver_name;
2597 device_initialize(&udc_controller->gadget.dev);
2599 dev_set_name(&udc_controller->gadget.dev, "gadget");
2601 udc_controller->gadget.dev.release = qe_udc_release;
2602 udc_controller->gadget.dev.parent = &ofdev->dev;
2604 /* initialize qe_ep struct */
2605 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2606 /* because the ep type isn't decide here so
2607 * qe_ep_init() should be called in ep_enable() */
2609 /* setup the qe_ep struct and link ep.ep.list
2610 * into gadget.ep_list */
2611 qe_ep_config(udc_controller, (unsigned char)i);
2614 /* ep0 initialization in here */
2615 ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2619 /* create a buf for ZLP send, need to remain zeroed */
2620 udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2621 if (udc_controller->nullbuf == NULL) {
2622 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2627 /* buffer for data of get_status request */
2628 udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2629 if (udc_controller->statusbuf == NULL) {
2634 udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2635 if (udc_controller->nullp == DMA_ADDR_INVALID) {
2636 udc_controller->nullp = dma_map_single(
2637 udc_controller->gadget.dev.parent,
2638 udc_controller->nullbuf,
2641 udc_controller->nullmap = 1;
2643 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2644 udc_controller->nullp, 256,
2648 tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2649 (unsigned long)udc_controller);
2650 /* request irq and disable DR */
2651 udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2652 if (!udc_controller->usb_irq) {
2657 ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2658 driver_name, udc_controller);
2660 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2661 udc_controller->usb_irq, ret);
2665 ret = device_add(&udc_controller->gadget.dev);
2669 ret = usb_add_gadget_udc(&ofdev->dev, &udc_controller->gadget);
2673 dev_info(udc_controller->dev,
2674 "%s USB controller initialized as device\n",
2675 (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2679 device_unregister(&udc_controller->gadget.dev);
2681 free_irq(udc_controller->usb_irq, udc_controller);
2683 irq_dispose_mapping(udc_controller->usb_irq);
2685 if (udc_controller->nullmap) {
2686 dma_unmap_single(udc_controller->gadget.dev.parent,
2687 udc_controller->nullp, 256,
2689 udc_controller->nullp = DMA_ADDR_INVALID;
2691 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2692 udc_controller->nullp, 256,
2695 kfree(udc_controller->statusbuf);
2697 kfree(udc_controller->nullbuf);
2699 ep = &udc_controller->eps[0];
2700 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2702 kfree(ep->rxbuffer);
2705 iounmap(udc_controller->usb_regs);
2707 kfree(udc_controller);
2708 udc_controller = NULL;
2713 static int qe_udc_suspend(struct platform_device *dev, pm_message_t state)
2718 static int qe_udc_resume(struct platform_device *dev)
2724 static int __devexit qe_udc_remove(struct platform_device *ofdev)
2729 DECLARE_COMPLETION(done);
2731 if (!udc_controller)
2734 usb_del_gadget_udc(&udc_controller->gadget);
2736 udc_controller->done = &done;
2737 tasklet_disable(&udc_controller->rx_tasklet);
2739 if (udc_controller->nullmap) {
2740 dma_unmap_single(udc_controller->gadget.dev.parent,
2741 udc_controller->nullp, 256,
2743 udc_controller->nullp = DMA_ADDR_INVALID;
2745 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2746 udc_controller->nullp, 256,
2749 kfree(udc_controller->statusbuf);
2750 kfree(udc_controller->nullbuf);
2752 ep = &udc_controller->eps[0];
2753 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2754 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2758 dma_unmap_single(udc_controller->gadget.dev.parent,
2761 ep->rxbuf_d = DMA_ADDR_INVALID;
2763 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2768 kfree(ep->rxbuffer);
2771 free_irq(udc_controller->usb_irq, udc_controller);
2772 irq_dispose_mapping(udc_controller->usb_irq);
2774 tasklet_kill(&udc_controller->rx_tasklet);
2776 iounmap(udc_controller->usb_regs);
2778 device_unregister(&udc_controller->gadget.dev);
2779 /* wait for release() of gadget.dev to free udc */
2780 wait_for_completion(&done);
2785 /*-------------------------------------------------------------------------*/
2786 static const struct of_device_id qe_udc_match[] __devinitconst = {
2788 .compatible = "fsl,mpc8323-qe-usb",
2789 .data = (void *)PORT_QE,
2792 .compatible = "fsl,mpc8360-qe-usb",
2793 .data = (void *)PORT_QE,
2796 .compatible = "fsl,mpc8272-cpm-usb",
2797 .data = (void *)PORT_CPM,
2802 MODULE_DEVICE_TABLE(of, qe_udc_match);
2804 static struct platform_driver udc_driver = {
2806 .name = (char *)driver_name,
2807 .owner = THIS_MODULE,
2808 .of_match_table = qe_udc_match,
2810 .probe = qe_udc_probe,
2811 .remove = __devexit_p(qe_udc_remove),
2813 .suspend = qe_udc_suspend,
2814 .resume = qe_udc_resume,
2818 module_platform_driver(udc_driver);
2820 MODULE_DESCRIPTION(DRIVER_DESC);
2821 MODULE_AUTHOR(DRIVER_AUTHOR);
2822 MODULE_LICENSE("GPL");