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fsl_qe_udc.c
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fsl_qe_udc.c
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/*
* 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
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#undef USB_TRACE
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.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_platform.h>
#include <linux/dma-mapping.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <asm/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 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,
};
/* it is initialized in probe() */
static struct qe_udc *udc_controller;
/********************************************************************
* 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);
/* this complete() should a func implemented by gadget layer,
* eg fsg->bulk_in_complete() */
if (req->req.complete)
req->req.complete(&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_controller->ep0_state = WAIT_FOR_SETUP;
udc_controller->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 == NULL) {
dev_err(ep->udc->dev, "malloc rxframe failed\n");
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 == NULL) {
dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
size);
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(udc_controller->gadget.dev.parent,
ep->rxbuffer,
size,
DMA_FROM_DEVICE);
ep->rxbufmap = 1;
} else {
dma_sync_single_for_device(udc_controller->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->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
usep |= (logepnum << USB_EPNUM_SHIFT);
switch (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 = le16_to_cpu(desc->wMaxPacketSize);
/* 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->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 == NULL) {
dev_err(udc->dev, "malloc txframe failed\n");
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(void)
{
setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
}
static inline void qe_usb_disable(void)
{
clrbits8(&udc_controller->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(unsigned long data)
{
struct qe_udc *udc = (struct qe_udc *)data;
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");
}