// SPDX-License-Identifier: GPL-2.0+ /* * driver/usb/gadget/fsl_qe_udc.c * * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved. * * Xie Xiaobo * Li Yang * Based on bareboard code from Shlomi Gridish. * * Description: * Freescle QE/CPM USB Pheripheral Controller Driver * The controller can be found on MPC8360, MPC8272, and etc. * MPC8360 Rev 1.1 may need QE mircocode update */ #undef USB_TRACE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fsl_qe_udc.h" #define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver" #define DRIVER_AUTHOR "Xie XiaoBo" #define DRIVER_VERSION "1.0" #define DMA_ADDR_INVALID (~(dma_addr_t)0) static const char driver_name[] = "fsl_qe_udc"; static const char driver_desc[] = DRIVER_DESC; /*ep name is important in gadget, it should obey the convention of ep_match()*/ static const char *const ep_name[] = { "ep0-control", /* everyone has ep0 */ /* 3 configurable endpoints */ "ep1", "ep2", "ep3", }; static const struct usb_endpoint_descriptor qe_ep0_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 0, .bmAttributes = USB_ENDPOINT_XFER_CONTROL, .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD, }; /******************************************************************** * Internal Used Function Start ********************************************************************/ /*----------------------------------------------------------------- * done() - retire a request; caller blocked irqs *--------------------------------------------------------------*/ static void done(struct qe_ep *ep, struct qe_req *req, int status) { struct qe_udc *udc = ep->udc; unsigned char stopped = ep->stopped; /* the req->queue pointer is used by ep_queue() func, in which * the request will be added into a udc_ep->queue 'd tail * so here the req will be dropped from the ep->queue */ list_del_init(&req->queue); /* req.status should be set as -EINPROGRESS in ep_queue() */ if (req->req.status == -EINPROGRESS) req->req.status = status; else status = req->req.status; if (req->mapped) { dma_unmap_single(udc->gadget.dev.parent, req->req.dma, req->req.length, ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->req.dma = DMA_ADDR_INVALID; req->mapped = 0; } else dma_sync_single_for_cpu(udc->gadget.dev.parent, req->req.dma, req->req.length, ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); if (status && (status != -ESHUTDOWN)) dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n", ep->ep.name, &req->req, status, req->req.actual, req->req.length); /* don't modify queue heads during completion callback */ ep->stopped = 1; spin_unlock(&udc->lock); usb_gadget_giveback_request(&ep->ep, &req->req); spin_lock(&udc->lock); ep->stopped = stopped; } /*----------------------------------------------------------------- * nuke(): delete all requests related to this ep *--------------------------------------------------------------*/ static void nuke(struct qe_ep *ep, int status) { /* Whether this eq has request linked */ while (!list_empty(&ep->queue)) { struct qe_req *req = NULL; req = list_entry(ep->queue.next, struct qe_req, queue); done(ep, req, status); } } /*---------------------------------------------------------------------------* * USB and Endpoint manipulate process, include parameter and register * *---------------------------------------------------------------------------*/ /* @value: 1--set stall 0--clean stall */ static int qe_eprx_stall_change(struct qe_ep *ep, int value) { u16 tem_usep; u8 epnum = ep->epnum; struct qe_udc *udc = ep->udc; tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); tem_usep = tem_usep & ~USB_RHS_MASK; if (value == 1) tem_usep |= USB_RHS_STALL; else if (ep->dir == USB_DIR_IN) tem_usep |= USB_RHS_IGNORE_OUT; out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); return 0; } static int qe_eptx_stall_change(struct qe_ep *ep, int value) { u16 tem_usep; u8 epnum = ep->epnum; struct qe_udc *udc = ep->udc; tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); tem_usep = tem_usep & ~USB_THS_MASK; if (value == 1) tem_usep |= USB_THS_STALL; else if (ep->dir == USB_DIR_OUT) tem_usep |= USB_THS_IGNORE_IN; out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); return 0; } static int qe_ep0_stall(struct qe_udc *udc) { qe_eptx_stall_change(&udc->eps[0], 1); qe_eprx_stall_change(&udc->eps[0], 1); udc->ep0_state = WAIT_FOR_SETUP; udc->ep0_dir = 0; return 0; } static int qe_eprx_nack(struct qe_ep *ep) { u8 epnum = ep->epnum; struct qe_udc *udc = ep->udc; if (ep->state == EP_STATE_IDLE) { /* Set the ep's nack */ clrsetbits_be16(&udc->usb_regs->usb_usep[epnum], USB_RHS_MASK, USB_RHS_NACK); /* Mask Rx and Busy interrupts */ clrbits16(&udc->usb_regs->usb_usbmr, (USB_E_RXB_MASK | USB_E_BSY_MASK)); ep->state = EP_STATE_NACK; } return 0; } static int qe_eprx_normal(struct qe_ep *ep) { struct qe_udc *udc = ep->udc; if (ep->state == EP_STATE_NACK) { clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum], USB_RTHS_MASK, USB_THS_IGNORE_IN); /* Unmask RX interrupts */ out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK | USB_E_RXB_MASK); setbits16(&udc->usb_regs->usb_usbmr, (USB_E_RXB_MASK | USB_E_BSY_MASK)); ep->state = EP_STATE_IDLE; ep->has_data = 0; } return 0; } static int qe_ep_cmd_stoptx(struct qe_ep *ep) { if (ep->udc->soc_type == PORT_CPM) cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT), CPM_USB_STOP_TX_OPCODE); else qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, ep->epnum, 0); return 0; } static int qe_ep_cmd_restarttx(struct qe_ep *ep) { if (ep->udc->soc_type == PORT_CPM) cpm_command(CPM_USB_RESTART_TX | (ep->epnum << CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE); else qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, ep->epnum, 0); return 0; } static int qe_ep_flushtxfifo(struct qe_ep *ep) { struct qe_udc *udc = ep->udc; int i; i = (int)ep->epnum; qe_ep_cmd_stoptx(ep); out_8(&udc->usb_regs->usb_uscom, USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase)); out_be32(&udc->ep_param[i]->tstate, 0); out_be16(&udc->ep_param[i]->tbcnt, 0); ep->c_txbd = ep->txbase; ep->n_txbd = ep->txbase; qe_ep_cmd_restarttx(ep); return 0; } static int qe_ep_filltxfifo(struct qe_ep *ep) { struct qe_udc *udc = ep->udc; out_8(&udc->usb_regs->usb_uscom, USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); return 0; } static int qe_epbds_reset(struct qe_udc *udc, int pipe_num) { struct qe_ep *ep; u32 bdring_len; struct qe_bd __iomem *bd; int i; ep = &udc->eps[pipe_num]; if (ep->dir == USB_DIR_OUT) bdring_len = USB_BDRING_LEN_RX; else bdring_len = USB_BDRING_LEN; bd = ep->rxbase; for (i = 0; i < (bdring_len - 1); i++) { out_be32((u32 __iomem *)bd, R_E | R_I); bd++; } out_be32((u32 __iomem *)bd, R_E | R_I | R_W); bd = ep->txbase; for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { out_be32(&bd->buf, 0); out_be32((u32 __iomem *)bd, 0); bd++; } out_be32((u32 __iomem *)bd, T_W); return 0; } static int qe_ep_reset(struct qe_udc *udc, int pipe_num) { struct qe_ep *ep; u16 tmpusep; ep = &udc->eps[pipe_num]; tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]); tmpusep &= ~USB_RTHS_MASK; switch (ep->dir) { case USB_DIR_BOTH: qe_ep_flushtxfifo(ep); break; case USB_DIR_OUT: tmpusep |= USB_THS_IGNORE_IN; break; case USB_DIR_IN: qe_ep_flushtxfifo(ep); tmpusep |= USB_RHS_IGNORE_OUT; break; default: break; } out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep); qe_epbds_reset(udc, pipe_num); return 0; } static int qe_ep_toggledata01(struct qe_ep *ep) { ep->data01 ^= 0x1; return 0; } static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num) { struct qe_ep *ep = &udc->eps[pipe_num]; unsigned long tmp_addr = 0; struct usb_ep_para __iomem *epparam; int i; struct qe_bd __iomem *bd; int bdring_len; if (ep->dir == USB_DIR_OUT) bdring_len = USB_BDRING_LEN_RX; else bdring_len = USB_BDRING_LEN; epparam = udc->ep_param[pipe_num]; /* alloc multi-ram for BD rings and set the ep parameters */ tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len + USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD); if (IS_ERR_VALUE(tmp_addr)) return -ENOMEM; out_be16(&epparam->rbase, (u16)tmp_addr); out_be16(&epparam->tbase, (u16)(tmp_addr + (sizeof(struct qe_bd) * bdring_len))); out_be16(&epparam->rbptr, in_be16(&epparam->rbase)); out_be16(&epparam->tbptr, in_be16(&epparam->tbase)); ep->rxbase = cpm_muram_addr(tmp_addr); ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd) * bdring_len)); ep->n_rxbd = ep->rxbase; ep->e_rxbd = ep->rxbase; ep->n_txbd = ep->txbase; ep->c_txbd = ep->txbase; ep->data01 = 0; /* data0 */ /* Init TX and RX bds */ bd = ep->rxbase; for (i = 0; i < bdring_len - 1; i++) { out_be32(&bd->buf, 0); out_be32((u32 __iomem *)bd, 0); bd++; } out_be32(&bd->buf, 0); out_be32((u32 __iomem *)bd, R_W); bd = ep->txbase; for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { out_be32(&bd->buf, 0); out_be32((u32 __iomem *)bd, 0); bd++; } out_be32(&bd->buf, 0); out_be32((u32 __iomem *)bd, T_W); return 0; } static int qe_ep_rxbd_update(struct qe_ep *ep) { unsigned int size; int i; unsigned int tmp; struct qe_bd __iomem *bd; unsigned int bdring_len; if (ep->rxbase == NULL) return -EINVAL; bd = ep->rxbase; ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC); if (!ep->rxframe) return -ENOMEM; qe_frame_init(ep->rxframe); if (ep->dir == USB_DIR_OUT) bdring_len = USB_BDRING_LEN_RX; else bdring_len = USB_BDRING_LEN; size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1); ep->rxbuffer = kzalloc(size, GFP_ATOMIC); if (!ep->rxbuffer) { kfree(ep->rxframe); return -ENOMEM; } ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer); if (ep->rxbuf_d == DMA_ADDR_INVALID) { ep->rxbuf_d = dma_map_single(ep->udc->gadget.dev.parent, ep->rxbuffer, size, DMA_FROM_DEVICE); ep->rxbufmap = 1; } else { dma_sync_single_for_device(ep->udc->gadget.dev.parent, ep->rxbuf_d, size, DMA_FROM_DEVICE); ep->rxbufmap = 0; } size = ep->ep.maxpacket + USB_CRC_SIZE + 2; tmp = ep->rxbuf_d; tmp = (u32)(((tmp >> 2) << 2) + 4); for (i = 0; i < bdring_len - 1; i++) { out_be32(&bd->buf, tmp); out_be32((u32 __iomem *)bd, (R_E | R_I)); tmp = tmp + size; bd++; } out_be32(&bd->buf, tmp); out_be32((u32 __iomem *)bd, (R_E | R_I | R_W)); return 0; } static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num) { struct qe_ep *ep = &udc->eps[pipe_num]; struct usb_ep_para __iomem *epparam; u16 usep, logepnum; u16 tmp; u8 rtfcr = 0; epparam = udc->ep_param[pipe_num]; usep = 0; logepnum = (ep->ep.desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); usep |= (logepnum << USB_EPNUM_SHIFT); switch (ep->ep.desc->bmAttributes & 0x03) { case USB_ENDPOINT_XFER_BULK: usep |= USB_TRANS_BULK; break; case USB_ENDPOINT_XFER_ISOC: usep |= USB_TRANS_ISO; break; case USB_ENDPOINT_XFER_INT: usep |= USB_TRANS_INT; break; default: usep |= USB_TRANS_CTR; break; } switch (ep->dir) { case USB_DIR_OUT: usep |= USB_THS_IGNORE_IN; break; case USB_DIR_IN: usep |= USB_RHS_IGNORE_OUT; break; default: break; } out_be16(&udc->usb_regs->usb_usep[pipe_num], usep); rtfcr = 0x30; out_8(&epparam->rbmr, rtfcr); out_8(&epparam->tbmr, rtfcr); tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE); /* MRBLR must be divisble by 4 */ tmp = (u16)(((tmp >> 2) << 2) + 4); out_be16(&epparam->mrblr, tmp); return 0; } static int qe_ep_init(struct qe_udc *udc, unsigned char pipe_num, const struct usb_endpoint_descriptor *desc) { struct qe_ep *ep = &udc->eps[pipe_num]; unsigned long flags; int reval = 0; u16 max = 0; max = usb_endpoint_maxp(desc); /* check the max package size validate for this endpoint */ /* Refer to USB2.0 spec table 9-13, */ if (pipe_num != 0) { switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { case USB_ENDPOINT_XFER_BULK: if (strstr(ep->ep.name, "-iso") || strstr(ep->ep.name, "-int")) goto en_done; switch (udc->gadget.speed) { case USB_SPEED_HIGH: if ((max == 128) || (max == 256) || (max == 512)) break; default: switch (max) { case 4: case 8: case 16: case 32: case 64: break; default: case USB_SPEED_LOW: goto en_done; } } break; case USB_ENDPOINT_XFER_INT: if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ goto en_done; switch (udc->gadget.speed) { case USB_SPEED_HIGH: if (max <= 1024) break; case USB_SPEED_FULL: if (max <= 64) break; default: if (max <= 8) break; goto en_done; } break; case USB_ENDPOINT_XFER_ISOC: if (strstr(ep->ep.name, "-bulk") || strstr(ep->ep.name, "-int")) goto en_done; switch (udc->gadget.speed) { case USB_SPEED_HIGH: if (max <= 1024) break; case USB_SPEED_FULL: if (max <= 1023) break; default: goto en_done; } break; case USB_ENDPOINT_XFER_CONTROL: if (strstr(ep->ep.name, "-iso") || strstr(ep->ep.name, "-int")) goto en_done; switch (udc->gadget.speed) { case USB_SPEED_HIGH: case USB_SPEED_FULL: switch (max) { case 1: case 2: case 4: case 8: case 16: case 32: case 64: break; default: goto en_done; } case USB_SPEED_LOW: switch (max) { case 1: case 2: case 4: case 8: break; default: goto en_done; } default: goto en_done; } break; default: goto en_done; } } /* if ep0*/ spin_lock_irqsave(&udc->lock, flags); /* initialize ep structure */ ep->ep.maxpacket = max; ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); ep->ep.desc = desc; ep->stopped = 0; ep->init = 1; if (pipe_num == 0) { ep->dir = USB_DIR_BOTH; udc->ep0_dir = USB_DIR_OUT; udc->ep0_state = WAIT_FOR_SETUP; } else { switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) { case USB_DIR_OUT: ep->dir = USB_DIR_OUT; break; case USB_DIR_IN: ep->dir = USB_DIR_IN; default: break; } } /* hardware special operation */ qe_ep_bd_init(udc, pipe_num); if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) { reval = qe_ep_rxbd_update(ep); if (reval) goto en_done1; } if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) { ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC); if (!ep->txframe) goto en_done2; qe_frame_init(ep->txframe); } qe_ep_register_init(udc, pipe_num); /* Now HW will be NAKing transfers to that EP, * until a buffer is queued to it. */ spin_unlock_irqrestore(&udc->lock, flags); return 0; en_done2: kfree(ep->rxbuffer); kfree(ep->rxframe); en_done1: spin_unlock_irqrestore(&udc->lock, flags); en_done: dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name); return -ENODEV; } static inline void qe_usb_enable(struct qe_udc *udc) { setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN); } static inline void qe_usb_disable(struct qe_udc *udc) { clrbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN); } /*----------------------------------------------------------------------------* * USB and EP basic manipulate function end * *----------------------------------------------------------------------------*/ /****************************************************************************** UDC transmit and receive process ******************************************************************************/ static void recycle_one_rxbd(struct qe_ep *ep) { u32 bdstatus; bdstatus = in_be32((u32 __iomem *)ep->e_rxbd); bdstatus = R_I | R_E | (bdstatus & R_W); out_be32((u32 __iomem *)ep->e_rxbd, bdstatus); if (bdstatus & R_W) ep->e_rxbd = ep->rxbase; else ep->e_rxbd++; } static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext) { u32 bdstatus; struct qe_bd __iomem *bd, *nextbd; unsigned char stop = 0; nextbd = ep->n_rxbd; bd = ep->e_rxbd; bdstatus = in_be32((u32 __iomem *)bd); while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) { bdstatus = R_E | R_I | (bdstatus & R_W); out_be32((u32 __iomem *)bd, bdstatus); if (bdstatus & R_W) bd = ep->rxbase; else bd++; bdstatus = in_be32((u32 __iomem *)bd); if (stopatnext && (bd == nextbd)) stop = 1; } ep->e_rxbd = bd; } static void ep_recycle_rxbds(struct qe_ep *ep) { struct qe_bd __iomem *bd = ep->n_rxbd; u32 bdstatus; u8 epnum = ep->epnum; struct qe_udc *udc = ep->udc; bdstatus = in_be32((u32 __iomem *)bd); if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) { bd = ep->rxbase + ((in_be16(&udc->ep_param[epnum]->rbptr) - in_be16(&udc->ep_param[epnum]->rbase)) >> 3); bdstatus = in_be32((u32 __iomem *)bd); if (bdstatus & R_W) bd = ep->rxbase; else bd++; ep->e_rxbd = bd; recycle_rxbds(ep, 0); ep->e_rxbd = ep->n_rxbd; } else recycle_rxbds(ep, 1); if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK) out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK); if (ep->has_data <= 0 && (!list_empty(&ep->queue))) qe_eprx_normal(ep); ep->localnack = 0; } static void setup_received_handle(struct qe_udc *udc, struct usb_ctrlrequest *setup); static int qe_ep_rxframe_handle(struct qe_ep *ep); static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req); /* when BD PID is setup, handle the packet */ static int ep0_setup_handle(struct qe_udc *udc) { struct qe_ep *ep = &udc->eps[0]; struct qe_frame *pframe; unsigned int fsize; u8 *cp; pframe = ep->rxframe; if ((frame_get_info(pframe) & PID_SETUP) && (udc->ep0_state == WAIT_FOR_SETUP)) { fsize = frame_get_length(pframe); if (unlikely(fsize != 8)) return -EINVAL; cp = (u8 *)&udc->local_setup_buff; memcpy(cp, pframe->data, fsize); ep->data01 = 1; /* handle the usb command base on the usb_ctrlrequest */ setup_received_handle(udc, &udc->local_setup_buff); return 0; } return -EINVAL; } static int qe_ep0_rx(struct qe_udc *udc) { struct qe_ep *ep = &udc->eps[0]; struct qe_frame *pframe; struct qe_bd __iomem *bd; u32 bdstatus, length; u32 vaddr; pframe = ep->rxframe; if (ep->dir == USB_DIR_IN) { dev_err(udc->dev, "ep0 not a control endpoint\n"); return -EINVAL; } bd = ep->n_rxbd; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; while (!(bdstatus & R_E) && length) { if ((bdstatus & R_F) && (bdstatus & R_L) && !(bdstatus & R_ERROR)) { if (length == USB_CRC_SIZE) { udc->ep0_state = WAIT_FOR_SETUP; dev_vdbg(udc->dev, "receive a ZLP in status phase\n"); } else { qe_frame_clean(pframe); vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); frame_set_data(pframe, (u8 *)vaddr); frame_set_length(pframe, (length - USB_CRC_SIZE)); frame_set_status(pframe, FRAME_OK); switch (bdstatus & R_PID) { case R_PID_SETUP: frame_set_info(pframe, PID_SETUP); break; case R_PID_DATA1: frame_set_info(pframe, PID_DATA1); break; default: frame_set_info(pframe, PID_DATA0); break; } if ((bdstatus & R_PID) == R_PID_SETUP) ep0_setup_handle(udc); else qe_ep_rxframe_handle(ep); } } else { dev_err(udc->dev, "The receive frame with error!\n"); } /* note: don't clear the rxbd's buffer address */ recycle_one_rxbd(ep); /* Get next BD */ if (bdstatus & R_W) bd = ep->rxbase; else bd++; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; } ep->n_rxbd = bd; return 0; } static int qe_ep_rxframe_handle(struct qe_ep *ep) { struct qe_frame *pframe; u8 framepid = 0; unsigned int fsize; u8 *cp; struct qe_req *req; pframe = ep->rxframe; if (frame_get_info(pframe) & PID_DATA1) framepid = 0x1; if (framepid != ep->data01) { dev_err(ep->udc->dev, "the data01 error!\n"); return -EIO; } fsize = frame_get_length(pframe); if (list_empty(&ep->queue)) { dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name); } else { req = list_entry(ep->queue.next, struct qe_req, queue); cp = (u8 *)(req->req.buf) + req->req.actual; if (cp) { memcpy(cp, pframe->data, fsize); req->req.actual += fsize; if ((fsize < ep->ep.maxpacket) || (req->req.actual >= req->req.length)) { if (ep->epnum == 0) ep0_req_complete(ep->udc, req); else done(ep, req, 0); if (list_empty(&ep->queue) && ep->epnum != 0) qe_eprx_nack(ep); } } } qe_ep_toggledata01(ep); return 0; } static void ep_rx_tasklet(struct tasklet_struct *t) { struct qe_udc *udc = from_tasklet(udc, t, rx_tasklet); struct qe_ep *ep; struct qe_frame *pframe; struct qe_bd __iomem *bd; unsigned long flags; u32 bdstatus, length; u32 vaddr, i; spin_lock_irqsave(&udc->lock, flags); for (i = 1; i < USB_MAX_ENDPOINTS; i++) { ep = &udc->eps[i]; if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) { dev_dbg(udc->dev, "This is a transmit ep or disable tasklet!\n"); continue; } pframe = ep->rxframe; bd = ep->n_rxbd; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; while (!(bdstatus & R_E) && length) { if (list_empty(&ep->queue)) { qe_eprx_nack(ep); dev_dbg(udc->dev, "The rxep have noreq %d\n", ep->has_data); break; } if ((bdstatus & R_F) && (bdstatus & R_L) && !(bdstatus & R_ERROR)) { qe_frame_clean(pframe); vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); frame_set_data(pframe, (u8 *)vaddr); frame_set_length(pframe, (length - USB_CRC_SIZE)); frame_set_status(pframe, FRAME_OK); switch (bdstatus & R_PID) { case R_PID_DATA1: frame_set_info(pframe, PID_DATA1); break; case R_PID_SETUP: frame_set_info(pframe, PID_SETUP); break; default: frame_set_info(pframe, PID_DATA0); break; } /* handle the rx frame */ qe_ep_rxframe_handle(ep); } else { dev_err(udc->dev, "error in received frame\n"); } /* note: don't clear the rxbd's buffer address */ /*clear the length */ out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK); ep->has_data--; if (!(ep->localnack)) recycle_one_rxbd(ep); /* Get next BD */ if (bdstatus & R_W) bd = ep->rxbase; else bd++; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; } ep->n_rxbd = bd; if (ep->localnack) ep_recycle_rxbds(ep); ep->enable_tasklet = 0; } /* for i=1 */ spin_unlock_irqrestore(&udc->lock, flags); } static int qe_ep_rx(struct qe_ep *ep) { struct qe_udc *udc; struct qe_frame *pframe; struct qe_bd __iomem *bd; u16 swoffs, ucoffs, emptybds; udc = ep->udc; pframe = ep->rxframe; if (ep->dir == USB_DIR_IN) { dev_err(udc->dev, "transmit ep in rx function\n"); return -EINVAL; } bd = ep->n_rxbd; swoffs = (u16)(bd - ep->rxbase); ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) - in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3); if (swoffs < ucoffs) emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs; else emptybds = swoffs - ucoffs; if (emptybds < MIN_EMPTY_BDS) { qe_eprx_nack(ep); ep->localnack = 1; dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds); } ep->has_data = USB_BDRING_LEN_RX - emptybds; if (list_empty(&ep->queue)) { qe_eprx_nack(ep); dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n", ep->has_data); return 0; } tasklet_schedule(&udc->rx_tasklet); ep->enable_tasklet = 1; return 0; } /* send data from a frame, no matter what tx_req */ static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame) { struct qe_udc *udc = ep->udc; struct qe_bd __iomem *bd; u16 saveusbmr; u32 bdstatus, pidmask; u32 paddr; if (ep->dir == USB_DIR_OUT) { dev_err(udc->dev, "receive ep passed to tx function\n"); return -EINVAL; } /* Disable the Tx interrupt */ saveusbmr = in_be16(&udc->usb_regs->usb_usbmr); out_be16(&udc->usb_regs->usb_usbmr, saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK)); bd = ep->n_txbd; bdstatus = in_be32((u32 __iomem *)bd); if (!(bdstatus & (T_R | BD_LENGTH_MASK))) { if (frame_get_length(frame) == 0) { frame_set_data(frame, udc->nullbuf); frame_set_length(frame, 2); frame->info |= (ZLP | NO_CRC); dev_vdbg(udc->dev, "the frame size = 0\n"); } paddr = virt_to_phys((void *)frame->data); out_be32(&bd->buf, paddr); bdstatus = (bdstatus&T_W); if (!(frame_get_info(frame) & NO_CRC)) bdstatus |= T_R | T_I | T_L | T_TC | frame_get_length(frame); else bdstatus |= T_R | T_I | T_L | frame_get_length(frame); /* if the packet is a ZLP in status phase */ if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP)) ep->data01 = 0x1; if (ep->data01) { pidmask = T_PID_DATA1; frame->info |= PID_DATA1; } else { pidmask = T_PID_DATA0; frame->info |= PID_DATA0; } bdstatus |= T_CNF; bdstatus |= pidmask; out_be32((u32 __iomem *)bd, bdstatus); qe_ep_filltxfifo(ep); /* enable the TX interrupt */ out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); qe_ep_toggledata01(ep); if (bdstatus & T_W) ep->n_txbd = ep->txbase; else ep->n_txbd++; return 0; } else { out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); dev_vdbg(udc->dev, "The tx bd is not ready!\n"); return -EBUSY; } } /* when a bd was transmitted, the function can * handle the tx_req, not include ep0 */ static int txcomplete(struct qe_ep *ep, unsigned char restart) { if (ep->tx_req != NULL) { struct qe_req *req = ep->tx_req; unsigned zlp = 0, last_len = 0; last_len = min_t(unsigned, req->req.length - ep->sent, ep->ep.maxpacket); if (!restart) { int asent = ep->last; ep->sent += asent; ep->last -= asent; } else { ep->last = 0; } /* zlp needed when req->re.zero is set */ if (req->req.zero) { if (last_len == 0 || (req->req.length % ep->ep.maxpacket) != 0) zlp = 0; else zlp = 1; } else zlp = 0; /* a request already were transmitted completely */ if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) { done(ep, ep->tx_req, 0); ep->tx_req = NULL; ep->last = 0; ep->sent = 0; } } /* we should gain a new tx_req fot this endpoint */ if (ep->tx_req == NULL) { if (!list_empty(&ep->queue)) { ep->tx_req = list_entry(ep->queue.next, struct qe_req, queue); ep->last = 0; ep->sent = 0; } } return 0; } /* give a frame and a tx_req, send some data */ static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame) { unsigned int size; u8 *buf; qe_frame_clean(frame); size = min_t(u32, (ep->tx_req->req.length - ep->sent), ep->ep.maxpacket); buf = (u8 *)ep->tx_req->req.buf + ep->sent; if (buf && size) { ep->last = size; ep->tx_req->req.actual += size; frame_set_data(frame, buf); frame_set_length(frame, size); frame_set_status(frame, FRAME_OK); frame_set_info(frame, 0); return qe_ep_tx(ep, frame); } return -EIO; } /* give a frame struct,send a ZLP */ static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor) { struct qe_udc *udc = ep->udc; if (frame == NULL) return -ENODEV; qe_frame_clean(frame); frame_set_data(frame, (u8 *)udc->nullbuf); frame_set_length(frame, 2); frame_set_status(frame, FRAME_OK); frame_set_info(frame, (ZLP | NO_CRC | infor)); return qe_ep_tx(ep, frame); } static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame) { struct qe_req *req = ep->tx_req; int reval; if (req == NULL) return -ENODEV; if ((req->req.length - ep->sent) > 0) reval = qe_usb_senddata(ep, frame); else reval = sendnulldata(ep, frame, 0); return reval; } /* if direction is DIR_IN, the status is Device->Host * if direction is DIR_OUT, the status transaction is Device<-Host * in status phase, udc create a request and gain status */ static int ep0_prime_status(struct qe_udc *udc, int direction) { struct qe_ep *ep = &udc->eps[0]; if (direction == USB_DIR_IN) { udc->ep0_state = DATA_STATE_NEED_ZLP; udc->ep0_dir = USB_DIR_IN; sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ); } else { udc->ep0_dir = USB_DIR_OUT; udc->ep0_state = WAIT_FOR_OUT_STATUS; } return 0; } /* a request complete in ep0, whether gadget request or udc request */ static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req) { struct qe_ep *ep = &udc->eps[0]; /* because usb and ep's status already been set in ch9setaddress() */ switch (udc->ep0_state) { case DATA_STATE_XMIT: done(ep, req, 0); /* receive status phase */ if (ep0_prime_status(udc, USB_DIR_OUT)) qe_ep0_stall(udc); break; case DATA_STATE_NEED_ZLP: done(ep, req, 0); udc->ep0_state = WAIT_FOR_SETUP; break; case DATA_STATE_RECV: done(ep, req, 0); /* send status phase */ if (ep0_prime_status(udc, USB_DIR_IN)) qe_ep0_stall(udc); break; case WAIT_FOR_OUT_STATUS: done(ep, req, 0); udc->ep0_state = WAIT_FOR_SETUP; break; case WAIT_FOR_SETUP: dev_vdbg(udc->dev, "Unexpected interrupt\n"); break; default: qe_ep0_stall(udc); break; } } static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart) { struct qe_req *tx_req = NULL; struct qe_frame *frame = ep->txframe; if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) { if (!restart) ep->udc->ep0_state = WAIT_FOR_SETUP; else sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ); return 0; } tx_req = ep->tx_req; if (tx_req != NULL) { if (!restart) { int asent = ep->last; ep->sent += asent; ep->last -= asent; } else { ep->last = 0; } /* a request already were transmitted completely */ if ((ep->tx_req->req.length - ep->sent) <= 0) { ep->tx_req->req.actual = (unsigned int)ep->sent; ep0_req_complete(ep->udc, ep->tx_req); ep->tx_req = NULL; ep->last = 0; ep->sent = 0; } } else { dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n"); } return 0; } static int ep0_txframe_handle(struct qe_ep *ep) { /* if have error, transmit again */ if (frame_get_status(ep->txframe) & FRAME_ERROR) { qe_ep_flushtxfifo(ep); dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n"); if (frame_get_info(ep->txframe) & PID_DATA0) ep->data01 = 0; else ep->data01 = 1; ep0_txcomplete(ep, 1); } else ep0_txcomplete(ep, 0); frame_create_tx(ep, ep->txframe); return 0; } static int qe_ep0_txconf(struct qe_ep *ep) { struct qe_bd __iomem *bd; struct qe_frame *pframe; u32 bdstatus; bd = ep->c_txbd; bdstatus = in_be32((u32 __iomem *)bd); while (!(bdstatus & T_R) && (bdstatus & ~T_W)) { pframe = ep->txframe; /* clear and recycle the BD */ out_be32((u32 __iomem *)bd, bdstatus & T_W); out_be32(&bd->buf, 0); if (bdstatus & T_W) ep->c_txbd = ep->txbase; else ep->c_txbd++; if (ep->c_txbd == ep->n_txbd) { if (bdstatus & DEVICE_T_ERROR) { frame_set_status(pframe, FRAME_ERROR); if (bdstatus & T_TO) pframe->status |= TX_ER_TIMEOUT; if (bdstatus & T_UN) pframe->status |= TX_ER_UNDERUN; } ep0_txframe_handle(ep); } bd = ep->c_txbd; bdstatus = in_be32((u32 __iomem *)bd); } return 0; } static int ep_txframe_handle(struct qe_ep *ep) { if (frame_get_status(ep->txframe) & FRAME_ERROR) { qe_ep_flushtxfifo(ep); dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n"); if (frame_get_info(ep->txframe) & PID_DATA0) ep->data01 = 0; else ep->data01 = 1; txcomplete(ep, 1); } else txcomplete(ep, 0); frame_create_tx(ep, ep->txframe); /* send the data */ return 0; } /* confirm the already trainsmited bd */ static int qe_ep_txconf(struct qe_ep *ep) { struct qe_bd __iomem *bd; struct qe_frame *pframe = NULL; u32 bdstatus; unsigned char breakonrxinterrupt = 0; bd = ep->c_txbd; bdstatus = in_be32((u32 __iomem *)bd); while (!(bdstatus & T_R) && (bdstatus & ~T_W)) { pframe = ep->txframe; if (bdstatus & DEVICE_T_ERROR) { frame_set_status(pframe, FRAME_ERROR); if (bdstatus & T_TO) pframe->status |= TX_ER_TIMEOUT; if (bdstatus & T_UN) pframe->status |= TX_ER_UNDERUN; } /* clear and recycle the BD */ out_be32((u32 __iomem *)bd, bdstatus & T_W); out_be32(&bd->buf, 0); if (bdstatus & T_W) ep->c_txbd = ep->txbase; else ep->c_txbd++; /* handle the tx frame */ ep_txframe_handle(ep); bd = ep->c_txbd; bdstatus = in_be32((u32 __iomem *)bd); } if (breakonrxinterrupt) return -EIO; else return 0; } /* Add a request in queue, and try to transmit a packet */ static int ep_req_send(struct qe_ep *ep, struct qe_req *req) { int reval = 0; if (ep->tx_req == NULL) { ep->sent = 0; ep->last = 0; txcomplete(ep, 0); /* can gain a new tx_req */ reval = frame_create_tx(ep, ep->txframe); } return reval; } /* Maybe this is a good ideal */ static int ep_req_rx(struct qe_ep *ep, struct qe_req *req) { struct qe_udc *udc = ep->udc; struct qe_frame *pframe = NULL; struct qe_bd __iomem *bd; u32 bdstatus, length; u32 vaddr, fsize; u8 *cp; u8 finish_req = 0; u8 framepid; if (list_empty(&ep->queue)) { dev_vdbg(udc->dev, "the req already finish!\n"); return 0; } pframe = ep->rxframe; bd = ep->n_rxbd; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; while (!(bdstatus & R_E) && length) { if (finish_req) break; if ((bdstatus & R_F) && (bdstatus & R_L) && !(bdstatus & R_ERROR)) { qe_frame_clean(pframe); vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); frame_set_data(pframe, (u8 *)vaddr); frame_set_length(pframe, (length - USB_CRC_SIZE)); frame_set_status(pframe, FRAME_OK); switch (bdstatus & R_PID) { case R_PID_DATA1: frame_set_info(pframe, PID_DATA1); break; default: frame_set_info(pframe, PID_DATA0); break; } /* handle the rx frame */ if (frame_get_info(pframe) & PID_DATA1) framepid = 0x1; else framepid = 0; if (framepid != ep->data01) { dev_vdbg(udc->dev, "the data01 error!\n"); } else { fsize = frame_get_length(pframe); cp = (u8 *)(req->req.buf) + req->req.actual; if (cp) { memcpy(cp, pframe->data, fsize); req->req.actual += fsize; if ((fsize < ep->ep.maxpacket) || (req->req.actual >= req->req.length)) { finish_req = 1; done(ep, req, 0); if (list_empty(&ep->queue)) qe_eprx_nack(ep); } } qe_ep_toggledata01(ep); } } else { dev_err(udc->dev, "The receive frame with error!\n"); } /* note: don't clear the rxbd's buffer address * * only Clear the length */ out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK)); ep->has_data--; /* Get next BD */ if (bdstatus & R_W) bd = ep->rxbase; else bd++; bdstatus = in_be32((u32 __iomem *)bd); length = bdstatus & BD_LENGTH_MASK; } ep->n_rxbd = bd; ep_recycle_rxbds(ep); return 0; } /* only add the request in queue */ static int ep_req_receive(struct qe_ep *ep, struct qe_req *req) { if (ep->state == EP_STATE_NACK) { if (ep->has_data <= 0) { /* Enable rx and unmask rx interrupt */ qe_eprx_normal(ep); } else { /* Copy the exist BD data */ ep_req_rx(ep, req); } } return 0; } /******************************************************************** Internal Used Function End ********************************************************************/ /*----------------------------------------------------------------------- Endpoint Management Functions For Gadget -----------------------------------------------------------------------*/ static int qe_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { struct qe_udc *udc; struct qe_ep *ep; int retval = 0; unsigned char epnum; ep = container_of(_ep, struct qe_ep, ep); /* catch various bogus parameters */ if (!_ep || !desc || _ep->name == ep_name[0] || (desc->bDescriptorType != USB_DT_ENDPOINT)) return -EINVAL; udc = ep->udc; if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN)) return -ESHUTDOWN; epnum = (u8)desc->bEndpointAddress & 0xF; retval = qe_ep_init(udc, epnum, desc); if (retval != 0) { cpm_muram_free(cpm_muram_offset(ep->rxbase)); dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum); return -EINVAL; } dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum); return 0; } static int qe_ep_disable(struct usb_ep *_ep) { struct qe_udc *udc; struct qe_ep *ep; unsigned long flags; unsigned int size; ep = container_of(_ep, struct qe_ep, ep); udc = ep->udc; if (!_ep || !ep->ep.desc) { dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL); return -EINVAL; } spin_lock_irqsave(&udc->lock, flags); /* Nuke all pending requests (does flush) */ nuke(ep, -ESHUTDOWN); ep->ep.desc = NULL; ep->stopped = 1; ep->tx_req = NULL; qe_ep_reset(udc, ep->epnum); spin_unlock_irqrestore(&udc->lock, flags); cpm_muram_free(cpm_muram_offset(ep->rxbase)); if (ep->dir == USB_DIR_OUT) size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN_RX + 1); else size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1); if (ep->dir != USB_DIR_IN) { kfree(ep->rxframe); if (ep->rxbufmap) { dma_unmap_single(udc->gadget.dev.parent, ep->rxbuf_d, size, DMA_FROM_DEVICE); ep->rxbuf_d = DMA_ADDR_INVALID; } else { dma_sync_single_for_cpu( udc->gadget.dev.parent, ep->rxbuf_d, size, DMA_FROM_DEVICE); } kfree(ep->rxbuffer); } if (ep->dir != USB_DIR_OUT) kfree(ep->txframe); dev_dbg(udc->dev, "disabled %s OK\n", _ep->name); return 0; } static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) { struct qe_req *req; req = kzalloc(sizeof(*req), gfp_flags); if (!req) return NULL; req->req.dma = DMA_ADDR_INVALID; INIT_LIST_HEAD(&req->queue); return &req->req; } static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req) { struct qe_req *req; req = container_of(_req, struct qe_req, req); if (_req) kfree(req); } static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req) { struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); struct qe_req *req = container_of(_req, struct qe_req, req); struct qe_udc *udc; int reval; udc = ep->udc; /* catch various bogus parameters */ if (!_req || !req->req.complete || !req->req.buf || !list_empty(&req->queue)) { dev_dbg(udc->dev, "bad params\n"); return -EINVAL; } if (!_ep || (!ep->ep.desc && ep_index(ep))) { dev_dbg(udc->dev, "bad ep\n"); return -EINVAL; } if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) return -ESHUTDOWN; req->ep = ep; /* map virtual address to hardware */ if (req->req.dma == DMA_ADDR_INVALID) { req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, req->req.buf, req->req.length, ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->mapped = 1; } else { dma_sync_single_for_device(ep->udc->gadget.dev.parent, req->req.dma, req->req.length, ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->mapped = 0; } req->req.status = -EINPROGRESS; req->req.actual = 0; list_add_tail(&req->queue, &ep->queue); dev_vdbg(udc->dev, "gadget have request in %s! %d\n", ep->name, req->req.length); /* push the request to device */ if (ep_is_in(ep)) reval = ep_req_send(ep, req); /* EP0 */ if (ep_index(ep) == 0 && req->req.length > 0) { if (ep_is_in(ep)) udc->ep0_state = DATA_STATE_XMIT; else udc->ep0_state = DATA_STATE_RECV; } if (ep->dir == USB_DIR_OUT) reval = ep_req_receive(ep, req); return 0; } /* queues (submits) an I/O request to an endpoint */ static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); struct qe_udc *udc = ep->udc; unsigned long flags; int ret; spin_lock_irqsave(&udc->lock, flags); ret = __qe_ep_queue(_ep, _req); spin_unlock_irqrestore(&udc->lock, flags); return ret; } /* dequeues (cancels, unlinks) an I/O request from an endpoint */ static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); struct qe_req *req; unsigned long flags; if (!_ep || !_req) return -EINVAL; spin_lock_irqsave(&ep->udc->lock, flags); /* make sure it's actually queued on this endpoint */ list_for_each_entry(req, &ep->queue, queue) { if (&req->req == _req) break; } if (&req->req != _req) { spin_unlock_irqrestore(&ep->udc->lock, flags); return -EINVAL; } done(ep, req, -ECONNRESET); spin_unlock_irqrestore(&ep->udc->lock, flags); return 0; } /*----------------------------------------------------------------- * modify the endpoint halt feature * @ep: the non-isochronous endpoint being stalled * @value: 1--set halt 0--clear halt * Returns zero, or a negative error code. *----------------------------------------------------------------*/ static int qe_ep_set_halt(struct usb_ep *_ep, int value) { struct qe_ep *ep; unsigned long flags; int status = -EOPNOTSUPP; struct qe_udc *udc; ep = container_of(_ep, struct qe_ep, ep); if (!_ep || !ep->ep.desc) { status = -EINVAL; goto out; } udc = ep->udc; /* Attempt to halt IN ep will fail if any transfer requests * are still queue */ if (value && ep_is_in(ep) && !list_empty(&ep->queue)) { status = -EAGAIN; goto out; } status = 0; spin_lock_irqsave(&ep->udc->lock, flags); qe_eptx_stall_change(ep, value); qe_eprx_stall_change(ep, value); spin_unlock_irqrestore(&ep->udc->lock, flags); if (ep->epnum == 0) { udc->ep0_state = WAIT_FOR_SETUP; udc->ep0_dir = 0; } /* set data toggle to DATA0 on clear halt */ if (value == 0) ep->data01 = 0; out: dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name, value ? "set" : "clear", status); return status; } static const struct usb_ep_ops qe_ep_ops = { .enable = qe_ep_enable, .disable = qe_ep_disable, .alloc_request = qe_alloc_request, .free_request = qe_free_request, .queue = qe_ep_queue, .dequeue = qe_ep_dequeue, .set_halt = qe_ep_set_halt, }; /*------------------------------------------------------------------------ Gadget Driver Layer Operations ------------------------------------------------------------------------*/ /* Get the current frame number */ static int qe_get_frame(struct usb_gadget *gadget) { struct qe_udc *udc = container_of(gadget, struct qe_udc, gadget); u16 tmp; tmp = in_be16(&udc->usb_param->frame_n); if (tmp & 0x8000) return tmp & 0x07ff; return -EINVAL; } static int fsl_qe_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver); static int fsl_qe_stop(struct usb_gadget *gadget); /* defined in usb_gadget.h */ static const struct usb_gadget_ops qe_gadget_ops = { .get_frame = qe_get_frame, .udc_start = fsl_qe_start, .udc_stop = fsl_qe_stop, }; /*------------------------------------------------------------------------- USB ep0 Setup process in BUS Enumeration -------------------------------------------------------------------------*/ static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe) { struct qe_ep *ep = &udc->eps[pipe]; nuke(ep, -ECONNRESET); ep->tx_req = NULL; return 0; } static int reset_queues(struct qe_udc *udc) { u8 pipe; for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++) udc_reset_ep_queue(udc, pipe); /* report disconnect; the driver is already quiesced */ spin_unlock(&udc->lock); usb_gadget_udc_reset(&udc->gadget, udc->driver); spin_lock(&udc->lock); return 0; } static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index, u16 length) { /* Save the new address to device struct */ udc->device_address = (u8) value; /* Update usb state */ udc->usb_state = USB_STATE_ADDRESS; /* Status phase , send a ZLP */ if (ep0_prime_status(udc, USB_DIR_IN)) qe_ep0_stall(udc); } static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req) { struct qe_req *req = container_of(_req, struct qe_req, req); req->req.buf = NULL; kfree(req); } static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value, u16 index, u16 length) { u16 usb_status = 0; struct qe_req *req; struct qe_ep *ep; int status = 0; ep = &udc->eps[0]; if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) { /* Get device status */ usb_status = 1 << USB_DEVICE_SELF_POWERED; } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) { /* Get interface status */ /* We don't have interface information in udc driver */ usb_status = 0; } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { /* Get endpoint status */ int pipe = index & USB_ENDPOINT_NUMBER_MASK; struct qe_ep *target_ep; u16 usep; if (pipe >= USB_MAX_ENDPOINTS) goto stall; target_ep = &udc->eps[pipe]; /* stall if endpoint doesn't exist */ if (!target_ep->ep.desc) goto stall; usep = in_be16(&udc->usb_regs->usb_usep[pipe]); if (index & USB_DIR_IN) { if (target_ep->dir != USB_DIR_IN) goto stall; if ((usep & USB_THS_MASK) == USB_THS_STALL) usb_status = 1 << USB_ENDPOINT_HALT; } else { if (target_ep->dir != USB_DIR_OUT) goto stall; if ((usep & USB_RHS_MASK) == USB_RHS_STALL) usb_status = 1 << USB_ENDPOINT_HALT; } } req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL), struct qe_req, req); req->req.length = 2; req->req.buf = udc->statusbuf; *(u16 *)req->req.buf = cpu_to_le16(usb_status); req->req.status = -EINPROGRESS; req->req.actual = 0; req->req.complete = ownercomplete; udc->ep0_dir = USB_DIR_IN; /* data phase */ status = __qe_ep_queue(&ep->ep, &req->req); if (status == 0) return; stall: dev_err(udc->dev, "Can't respond to getstatus request \n"); qe_ep0_stall(udc); } /* only handle the setup request, suppose the device in normal status */ static void setup_received_handle(struct qe_udc *udc, struct usb_ctrlrequest *setup) { /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/ u16 wValue = le16_to_cpu(setup->wValue); u16 wIndex = le16_to_cpu(setup->wIndex); u16 wLength = le16_to_cpu(setup->wLength); /* clear the previous request in the ep0 */ udc_reset_ep_queue(udc, 0); if (setup->bRequestType & USB_DIR_IN) udc->ep0_dir = USB_DIR_IN; else udc->ep0_dir = USB_DIR_OUT; switch (setup->bRequest) { case USB_REQ_GET_STATUS: /* Data+Status phase form udc */ if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) != (USB_DIR_IN | USB_TYPE_STANDARD)) break; ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength); return; case USB_REQ_SET_ADDRESS: /* Status phase from udc */ if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE)) break; ch9setaddress(udc, wValue, wIndex, wLength); return; case USB_REQ_CLEAR_FEATURE: case USB_REQ_SET_FEATURE: /* Requests with no data phase, status phase from udc */ if ((setup->bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) break; if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK; struct qe_ep *ep; if (wValue != 0 || wLength != 0 || pipe >= USB_MAX_ENDPOINTS) break; ep = &udc->eps[pipe]; spin_unlock(&udc->lock); qe_ep_set_halt(&ep->ep, (setup->bRequest == USB_REQ_SET_FEATURE) ? 1 : 0); spin_lock(&udc->lock); } ep0_prime_status(udc, USB_DIR_IN); return; default: break; } if (wLength) { /* Data phase from gadget, status phase from udc */ if (setup->bRequestType & USB_DIR_IN) { udc->ep0_state = DATA_STATE_XMIT; udc->ep0_dir = USB_DIR_IN; } else { udc->ep0_state = DATA_STATE_RECV; udc->ep0_dir = USB_DIR_OUT; } spin_unlock(&udc->lock); if (udc->driver->setup(&udc->gadget, &udc->local_setup_buff) < 0) qe_ep0_stall(udc); spin_lock(&udc->lock); } else { /* No data phase, IN status from gadget */ udc->ep0_dir = USB_DIR_IN; spin_unlock(&udc->lock); if (udc->driver->setup(&udc->gadget, &udc->local_setup_buff) < 0) qe_ep0_stall(udc); spin_lock(&udc->lock); udc->ep0_state = DATA_STATE_NEED_ZLP; } } /*------------------------------------------------------------------------- USB Interrupt handlers -------------------------------------------------------------------------*/ static void suspend_irq(struct qe_udc *udc) { udc->resume_state = udc->usb_state; udc->usb_state = USB_STATE_SUSPENDED; /* report suspend to the driver ,serial.c not support this*/ if (udc->driver->suspend) udc->driver->suspend(&udc->gadget); } static void resume_irq(struct qe_udc *udc) { udc->usb_state = udc->resume_state; udc->resume_state = 0; /* report resume to the driver , serial.c not support this*/ if (udc->driver->resume) udc->driver->resume(&udc->gadget); } static void idle_irq(struct qe_udc *udc) { u8 usbs; usbs = in_8(&udc->usb_regs->usb_usbs); if (usbs & USB_IDLE_STATUS_MASK) { if ((udc->usb_state) != USB_STATE_SUSPENDED) suspend_irq(udc); } else { if (udc->usb_state == USB_STATE_SUSPENDED) resume_irq(udc); } } static int reset_irq(struct qe_udc *udc) { unsigned char i; if (udc->usb_state == USB_STATE_DEFAULT) return 0; qe_usb_disable(udc); out_8(&udc->usb_regs->usb_usadr, 0); for (i = 0; i < USB_MAX_ENDPOINTS; i++) { if (udc->eps[i].init) qe_ep_reset(udc, i); } reset_queues(udc); udc->usb_state = USB_STATE_DEFAULT; udc->ep0_state = WAIT_FOR_SETUP; udc->ep0_dir = USB_DIR_OUT; qe_usb_enable(udc); return 0; } static int bsy_irq(struct qe_udc *udc) { return 0; } static int txe_irq(struct qe_udc *udc) { return 0; } /* ep0 tx interrupt also in here */ static int tx_irq(struct qe_udc *udc) { struct qe_ep *ep; struct qe_bd __iomem *bd; int i, res = 0; if ((udc->usb_state == USB_STATE_ADDRESS) && (in_8(&udc->usb_regs->usb_usadr) == 0)) out_8(&udc->usb_regs->usb_usadr, udc->device_address); for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) { ep = &udc->eps[i]; if (ep && ep->init && (ep->dir != USB_DIR_OUT)) { bd = ep->c_txbd; if (!(in_be32((u32 __iomem *)bd) & T_R) && (in_be32(&bd->buf))) { /* confirm the transmitted bd */ if (ep->epnum == 0) res = qe_ep0_txconf(ep); else res = qe_ep_txconf(ep); } } } return res; } /* setup packect's rx is handle in the function too */ static void rx_irq(struct qe_udc *udc) { struct qe_ep *ep; struct qe_bd __iomem *bd; int i; for (i = 0; i < USB_MAX_ENDPOINTS; i++) { ep = &udc->eps[i]; if (ep && ep->init && (ep->dir != USB_DIR_IN)) { bd = ep->n_rxbd; if (!(in_be32((u32 __iomem *)bd) & R_E) && (in_be32(&bd->buf))) { if (ep->epnum == 0) { qe_ep0_rx(udc); } else { /*non-setup package receive*/ qe_ep_rx(ep); } } } } } static irqreturn_t qe_udc_irq(int irq, void *_udc) { struct qe_udc *udc = (struct qe_udc *)_udc; u16 irq_src; irqreturn_t status = IRQ_NONE; unsigned long flags; spin_lock_irqsave(&udc->lock, flags); irq_src = in_be16(&udc->usb_regs->usb_usber) & in_be16(&udc->usb_regs->usb_usbmr); /* Clear notification bits */ out_be16(&udc->usb_regs->usb_usber, irq_src); /* USB Interrupt */ if (irq_src & USB_E_IDLE_MASK) { idle_irq(udc); irq_src &= ~USB_E_IDLE_MASK; status = IRQ_HANDLED; } if (irq_src & USB_E_TXB_MASK) { tx_irq(udc); irq_src &= ~USB_E_TXB_MASK; status = IRQ_HANDLED; } if (irq_src & USB_E_RXB_MASK) { rx_irq(udc); irq_src &= ~USB_E_RXB_MASK; status = IRQ_HANDLED; } if (irq_src & USB_E_RESET_MASK) { reset_irq(udc); irq_src &= ~USB_E_RESET_MASK; status = IRQ_HANDLED; } if (irq_src & USB_E_BSY_MASK) { bsy_irq(udc); irq_src &= ~USB_E_BSY_MASK; status = IRQ_HANDLED; } if (irq_src & USB_E_TXE_MASK) { txe_irq(udc); irq_src &= ~USB_E_TXE_MASK; status = IRQ_HANDLED; } spin_unlock_irqrestore(&udc->lock, flags); return status; } /*------------------------------------------------------------------------- Gadget driver probe and unregister. --------------------------------------------------------------------------*/ static int fsl_qe_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver) { struct qe_udc *udc; unsigned long flags; udc = container_of(gadget, struct qe_udc, gadget); /* lock is needed but whether should use this lock or another */ spin_lock_irqsave(&udc->lock, flags); driver->driver.bus = NULL; /* hook up the driver */ udc->driver = driver; udc->gadget.speed = driver->max_speed; /* Enable IRQ reg and Set usbcmd reg EN bit */ qe_usb_enable(udc); out_be16(&udc->usb_regs->usb_usber, 0xffff); out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE); udc->usb_state = USB_STATE_ATTACHED; udc->ep0_state = WAIT_FOR_SETUP; udc->ep0_dir = USB_DIR_OUT; spin_unlock_irqrestore(&udc->lock, flags); return 0; } static int fsl_qe_stop(struct usb_gadget *gadget) { struct qe_udc *udc; struct qe_ep *loop_ep; unsigned long flags; udc = container_of(gadget, struct qe_udc, gadget); /* stop usb controller, disable intr */ qe_usb_disable(udc); /* in fact, no needed */ udc->usb_state = USB_STATE_ATTACHED; udc->ep0_state = WAIT_FOR_SETUP; udc->ep0_dir = 0; /* stand operation */ spin_lock_irqsave(&udc->lock, flags); udc->gadget.speed = USB_SPEED_UNKNOWN; nuke(&udc->eps[0], -ESHUTDOWN); list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list) nuke(loop_ep, -ESHUTDOWN); spin_unlock_irqrestore(&udc->lock, flags); udc->driver = NULL; return 0; } /* udc structure's alloc and setup, include ep-param alloc */ static struct qe_udc *qe_udc_config(struct platform_device *ofdev) { struct qe_udc *udc; struct device_node *np = ofdev->dev.of_node; unsigned long tmp_addr = 0; struct usb_device_para __iomem *usbpram; unsigned int i; u64 size; u32 offset; udc = kzalloc(sizeof(*udc), GFP_KERNEL); if (!udc) goto cleanup; udc->dev = &ofdev->dev; /* get default address of usb parameter in MURAM from device tree */ offset = *of_get_address(np, 1, &size, NULL); udc->usb_param = cpm_muram_addr(offset); memset_io(udc->usb_param, 0, size); usbpram = udc->usb_param; out_be16(&usbpram->frame_n, 0); out_be32(&usbpram->rstate, 0); tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para)), USB_EP_PARA_ALIGNMENT); if (IS_ERR_VALUE(tmp_addr)) goto cleanup; for (i = 0; i < USB_MAX_ENDPOINTS; i++) { out_be16(&usbpram->epptr[i], (u16)tmp_addr); udc->ep_param[i] = cpm_muram_addr(tmp_addr); tmp_addr += 32; } memset_io(udc->ep_param[0], 0, USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para)); udc->resume_state = USB_STATE_NOTATTACHED; udc->usb_state = USB_STATE_POWERED; udc->ep0_dir = 0; spin_lock_init(&udc->lock); return udc; cleanup: kfree(udc); return NULL; } /* USB Controller register init */ static int qe_udc_reg_init(struct qe_udc *udc) { struct usb_ctlr __iomem *qe_usbregs; qe_usbregs = udc->usb_regs; /* Spec says that we must enable the USB controller to change mode. */ out_8(&qe_usbregs->usb_usmod, 0x01); /* Mode changed, now disable it, since muram isn't initialized yet. */ out_8(&qe_usbregs->usb_usmod, 0x00); /* Initialize the rest. */ out_be16(&qe_usbregs->usb_usbmr, 0); out_8(&qe_usbregs->usb_uscom, 0); out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR); return 0; } static int qe_ep_config(struct qe_udc *udc, unsigned char pipe_num) { struct qe_ep *ep = &udc->eps[pipe_num]; ep->udc = udc; strcpy(ep->name, ep_name[pipe_num]); ep->ep.name = ep_name[pipe_num]; if (pipe_num == 0) { ep->ep.caps.type_control = true; } else { ep->ep.caps.type_iso = true; ep->ep.caps.type_bulk = true; ep->ep.caps.type_int = true; } ep->ep.caps.dir_in = true; ep->ep.caps.dir_out = true; ep->ep.ops = &qe_ep_ops; ep->stopped = 1; usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); ep->ep.desc = NULL; ep->dir = 0xff; ep->epnum = (u8)pipe_num; ep->sent = 0; ep->last = 0; ep->init = 0; ep->rxframe = NULL; ep->txframe = NULL; ep->tx_req = NULL; ep->state = EP_STATE_IDLE; ep->has_data = 0; /* the queue lists any req for this ep */ INIT_LIST_HEAD(&ep->queue); /* gagdet.ep_list used for ep_autoconfig so no ep0*/ if (pipe_num != 0) list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); ep->gadget = &udc->gadget; return 0; } /*----------------------------------------------------------------------- * UDC device Driver operation functions * *----------------------------------------------------------------------*/ static void qe_udc_release(struct device *dev) { struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev); int i; complete(udc->done); cpm_muram_free(cpm_muram_offset(udc->ep_param[0])); for (i = 0; i < USB_MAX_ENDPOINTS; i++) udc->ep_param[i] = NULL; kfree(udc); } /* Driver probe functions */ static const struct of_device_id qe_udc_match[]; static int qe_udc_probe(struct platform_device *ofdev) { struct qe_udc *udc; const struct of_device_id *match; struct device_node *np = ofdev->dev.of_node; struct qe_ep *ep; unsigned int ret = 0; unsigned int i; const void *prop; match = of_match_device(qe_udc_match, &ofdev->dev); if (!match) return -EINVAL; prop = of_get_property(np, "mode", NULL); if (!prop || strcmp(prop, "peripheral")) return -ENODEV; /* Initialize the udc structure including QH member and other member */ udc = qe_udc_config(ofdev); if (!udc) { dev_err(&ofdev->dev, "failed to initialize\n"); return -ENOMEM; } udc->soc_type = (unsigned long)match->data; udc->usb_regs = of_iomap(np, 0); if (!udc->usb_regs) { ret = -ENOMEM; goto err1; } /* initialize usb hw reg except for regs for EP, * leave usbintr reg untouched*/ qe_udc_reg_init(udc); /* here comes the stand operations for probe * set the qe_udc->gadget.xxx */ udc->gadget.ops = &qe_gadget_ops; /* gadget.ep0 is a pointer */ udc->gadget.ep0 = &udc->eps[0].ep; INIT_LIST_HEAD(&udc->gadget.ep_list); /* modify in register gadget process */ udc->gadget.speed = USB_SPEED_UNKNOWN; /* name: Identifies the controller hardware type. */ udc->gadget.name = driver_name; udc->gadget.dev.parent = &ofdev->dev; /* initialize qe_ep struct */ for (i = 0; i < USB_MAX_ENDPOINTS ; i++) { /* because the ep type isn't decide here so * qe_ep_init() should be called in ep_enable() */ /* setup the qe_ep struct and link ep.ep.list * into gadget.ep_list */ qe_ep_config(udc, (unsigned char)i); } /* ep0 initialization in here */ ret = qe_ep_init(udc, 0, &qe_ep0_desc); if (ret) goto err2; /* create a buf for ZLP send, need to remain zeroed */ udc->nullbuf = devm_kzalloc(&ofdev->dev, 256, GFP_KERNEL); if (udc->nullbuf == NULL) { ret = -ENOMEM; goto err3; } /* buffer for data of get_status request */ udc->statusbuf = devm_kzalloc(&ofdev->dev, 2, GFP_KERNEL); if (udc->statusbuf == NULL) { ret = -ENOMEM; goto err3; } udc->nullp = virt_to_phys((void *)udc->nullbuf); if (udc->nullp == DMA_ADDR_INVALID) { udc->nullp = dma_map_single( udc->gadget.dev.parent, udc->nullbuf, 256, DMA_TO_DEVICE); udc->nullmap = 1; } else { dma_sync_single_for_device(udc->gadget.dev.parent, udc->nullp, 256, DMA_TO_DEVICE); } tasklet_setup(&udc->rx_tasklet, ep_rx_tasklet); /* request irq and disable DR */ udc->usb_irq = irq_of_parse_and_map(np, 0); if (!udc->usb_irq) { ret = -EINVAL; goto err_noirq; } ret = request_irq(udc->usb_irq, qe_udc_irq, 0, driver_name, udc); if (ret) { dev_err(udc->dev, "cannot request irq %d err %d\n", udc->usb_irq, ret); goto err4; } ret = usb_add_gadget_udc_release(&ofdev->dev, &udc->gadget, qe_udc_release); if (ret) goto err5; platform_set_drvdata(ofdev, udc); dev_info(udc->dev, "%s USB controller initialized as device\n", (udc->soc_type == PORT_QE) ? "QE" : "CPM"); return 0; err5: free_irq(udc->usb_irq, udc); err4: irq_dispose_mapping(udc->usb_irq); err_noirq: if (udc->nullmap) { dma_unmap_single(udc->gadget.dev.parent, udc->nullp, 256, DMA_TO_DEVICE); udc->nullp = DMA_ADDR_INVALID; } else { dma_sync_single_for_cpu(udc->gadget.dev.parent, udc->nullp, 256, DMA_TO_DEVICE); } err3: ep = &udc->eps[0]; cpm_muram_free(cpm_muram_offset(ep->rxbase)); kfree(ep->rxframe); kfree(ep->rxbuffer); kfree(ep->txframe); err2: iounmap(udc->usb_regs); err1: kfree(udc); return ret; } #ifdef CONFIG_PM static int qe_udc_suspend(struct platform_device *dev, pm_message_t state) { return -ENOTSUPP; } static int qe_udc_resume(struct platform_device *dev) { return -ENOTSUPP; } #endif static int qe_udc_remove(struct platform_device *ofdev) { struct qe_udc *udc = platform_get_drvdata(ofdev); struct qe_ep *ep; unsigned int size; DECLARE_COMPLETION_ONSTACK(done); usb_del_gadget_udc(&udc->gadget); udc->done = &done; tasklet_disable(&udc->rx_tasklet); if (udc->nullmap) { dma_unmap_single(udc->gadget.dev.parent, udc->nullp, 256, DMA_TO_DEVICE); udc->nullp = DMA_ADDR_INVALID; } else { dma_sync_single_for_cpu(udc->gadget.dev.parent, udc->nullp, 256, DMA_TO_DEVICE); } ep = &udc->eps[0]; cpm_muram_free(cpm_muram_offset(ep->rxbase)); size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1); kfree(ep->rxframe); if (ep->rxbufmap) { dma_unmap_single(udc->gadget.dev.parent, ep->rxbuf_d, size, DMA_FROM_DEVICE); ep->rxbuf_d = DMA_ADDR_INVALID; } else { dma_sync_single_for_cpu(udc->gadget.dev.parent, ep->rxbuf_d, size, DMA_FROM_DEVICE); } kfree(ep->rxbuffer); kfree(ep->txframe); free_irq(udc->usb_irq, udc); irq_dispose_mapping(udc->usb_irq); tasklet_kill(&udc->rx_tasklet); iounmap(udc->usb_regs); /* wait for release() of gadget.dev to free udc */ wait_for_completion(&done); return 0; } /*-------------------------------------------------------------------------*/ static const struct of_device_id qe_udc_match[] = { { .compatible = "fsl,mpc8323-qe-usb", .data = (void *)PORT_QE, }, { .compatible = "fsl,mpc8360-qe-usb", .data = (void *)PORT_QE, }, { .compatible = "fsl,mpc8272-cpm-usb", .data = (void *)PORT_CPM, }, {}, }; MODULE_DEVICE_TABLE(of, qe_udc_match); static struct platform_driver udc_driver = { .driver = { .name = driver_name, .of_match_table = qe_udc_match, }, .probe = qe_udc_probe, .remove = qe_udc_remove, #ifdef CONFIG_PM .suspend = qe_udc_suspend, .resume = qe_udc_resume, #endif }; module_platform_driver(udc_driver); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL");