diff options
Diffstat (limited to 'drivers/usb/gadget/udc/fsl_qe_udc.c')
| -rw-r--r-- | drivers/usb/gadget/udc/fsl_qe_udc.c | 2726 |
1 files changed, 2726 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c new file mode 100644 index 000000000..72b6d74b3 --- /dev/null +++ b/drivers/usb/gadget/udc/fsl_qe_udc.c @@ -0,0 +1,2726 @@ +// 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 <X.Xie@freescale.com> + * Li Yang <leoli@freescale.com> + * 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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/moduleparam.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/dma-mapping.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> +#include <soc/fsl/qe/qe.h> +#include <asm/cpm.h> +#include <asm/dma.h> +#include <asm/reg.h> +#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; + fallthrough; + 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; + fallthrough; + case USB_SPEED_FULL: + if (max <= 64) + break; + fallthrough; + 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; + fallthrough; + case USB_SPEED_FULL: + if (max <= 1023) + break; + fallthrough; + 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; + } + fallthrough; + 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 = NULL; + struct qe_req *iter; + 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(iter, &ep->queue, queue) { + if (&iter->req != _req) + continue; + req = iter; + break; + } + + if (!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); + + /* 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"); |