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WSL2-Linux-Kernel/drivers/usb/gadget/fusb300_udc.c

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36 KiB
C
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/*
* Fusb300 UDC (USB gadget)
*
* Copyright (C) 2010 Faraday Technology Corp.
*
* Author : Yuan-hsin Chen <yhchen@faraday-tech.com>
*
* 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; version 2 of the License.
*/
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include "fusb300_udc.h"
MODULE_DESCRIPTION("FUSB300 USB gadget driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
MODULE_ALIAS("platform:fusb300_udc");
#define DRIVER_VERSION "20 October 2010"
static const char udc_name[] = "fusb300_udc";
static const char * const fusb300_ep_name[] = {
"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9",
"ep10", "ep11", "ep12", "ep13", "ep14", "ep15"
};
static void done(struct fusb300_ep *ep, struct fusb300_request *req,
int status);
static void fusb300_enable_bit(struct fusb300 *fusb300, u32 offset,
u32 value)
{
u32 reg = ioread32(fusb300->reg + offset);
reg |= value;
iowrite32(reg, fusb300->reg + offset);
}
static void fusb300_disable_bit(struct fusb300 *fusb300, u32 offset,
u32 value)
{
u32 reg = ioread32(fusb300->reg + offset);
reg &= ~value;
iowrite32(reg, fusb300->reg + offset);
}
static void fusb300_ep_setting(struct fusb300_ep *ep,
struct fusb300_ep_info info)
{
ep->epnum = info.epnum;
ep->type = info.type;
}
static int fusb300_ep_release(struct fusb300_ep *ep)
{
if (!ep->epnum)
return 0;
ep->epnum = 0;
ep->stall = 0;
ep->wedged = 0;
return 0;
}
static void fusb300_set_fifo_entry(struct fusb300 *fusb300,
u32 ep)
{
u32 val = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
val &= ~FUSB300_EPSET1_FIFOENTRY_MSK;
val |= FUSB300_EPSET1_FIFOENTRY(FUSB300_FIFO_ENTRY_NUM);
iowrite32(val, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
}
static void fusb300_set_start_entry(struct fusb300 *fusb300,
u8 ep)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
u32 start_entry = fusb300->fifo_entry_num * FUSB300_FIFO_ENTRY_NUM;
reg &= ~FUSB300_EPSET1_START_ENTRY_MSK ;
reg |= FUSB300_EPSET1_START_ENTRY(start_entry);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
if (fusb300->fifo_entry_num == FUSB300_MAX_FIFO_ENTRY) {
fusb300->fifo_entry_num = 0;
fusb300->addrofs = 0;
pr_err("fifo entry is over the maximum number!\n");
} else
fusb300->fifo_entry_num++;
}
/* set fusb300_set_start_entry first before fusb300_set_epaddrofs */
static void fusb300_set_epaddrofs(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
reg &= ~FUSB300_EPSET2_ADDROFS_MSK;
reg |= FUSB300_EPSET2_ADDROFS(fusb300->addrofs);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
fusb300->addrofs += (info.maxpacket + 7) / 8 * FUSB300_FIFO_ENTRY_NUM;
}
static void ep_fifo_setting(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
fusb300_set_fifo_entry(fusb300, info.epnum);
fusb300_set_start_entry(fusb300, info.epnum);
fusb300_set_epaddrofs(fusb300, info);
}
static void fusb300_set_eptype(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
reg &= ~FUSB300_EPSET1_TYPE_MSK;
reg |= FUSB300_EPSET1_TYPE(info.type);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
}
static void fusb300_set_epdir(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg;
if (!info.dir_in)
return;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
reg &= ~FUSB300_EPSET1_DIR_MSK;
reg |= FUSB300_EPSET1_DIRIN;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
}
static void fusb300_set_ep_active(struct fusb300 *fusb300,
u8 ep)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
reg |= FUSB300_EPSET1_ACTEN;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
}
static void fusb300_set_epmps(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
reg &= ~FUSB300_EPSET2_MPS_MSK;
reg |= FUSB300_EPSET2_MPS(info.maxpacket);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
}
static void fusb300_set_interval(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
reg &= ~FUSB300_EPSET1_INTERVAL(0x7);
reg |= FUSB300_EPSET1_INTERVAL(info.interval);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
}
static void fusb300_set_bwnum(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
reg &= ~FUSB300_EPSET1_BWNUM(0x3);
reg |= FUSB300_EPSET1_BWNUM(info.bw_num);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
}
static void set_ep_reg(struct fusb300 *fusb300,
struct fusb300_ep_info info)
{
fusb300_set_eptype(fusb300, info);
fusb300_set_epdir(fusb300, info);
fusb300_set_epmps(fusb300, info);
if (info.interval)
fusb300_set_interval(fusb300, info);
if (info.bw_num)
fusb300_set_bwnum(fusb300, info);
fusb300_set_ep_active(fusb300, info.epnum);
}
static int config_ep(struct fusb300_ep *ep,
const struct usb_endpoint_descriptor *desc)
{
struct fusb300 *fusb300 = ep->fusb300;
struct fusb300_ep_info info;
ep->ep.desc = desc;
info.interval = 0;
info.addrofs = 0;
info.bw_num = 0;
info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
info.maxpacket = usb_endpoint_maxp(desc);
info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
if ((info.type == USB_ENDPOINT_XFER_INT) ||
(info.type == USB_ENDPOINT_XFER_ISOC)) {
info.interval = desc->bInterval;
if (info.type == USB_ENDPOINT_XFER_ISOC)
info.bw_num = ((desc->wMaxPacketSize & 0x1800) >> 11);
}
ep_fifo_setting(fusb300, info);
set_ep_reg(fusb300, info);
fusb300_ep_setting(ep, info);
fusb300->ep[info.epnum] = ep;
return 0;
}
static int fusb300_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct fusb300_ep *ep;
ep = container_of(_ep, struct fusb300_ep, ep);
if (ep->fusb300->reenum) {
ep->fusb300->fifo_entry_num = 0;
ep->fusb300->addrofs = 0;
ep->fusb300->reenum = 0;
}
return config_ep(ep, desc);
}
static int fusb300_disable(struct usb_ep *_ep)
{
struct fusb300_ep *ep;
struct fusb300_request *req;
unsigned long flags;
ep = container_of(_ep, struct fusb300_ep, ep);
BUG_ON(!ep);
while (!list_empty(&ep->queue)) {
req = list_entry(ep->queue.next, struct fusb300_request, queue);
spin_lock_irqsave(&ep->fusb300->lock, flags);
done(ep, req, -ECONNRESET);
spin_unlock_irqrestore(&ep->fusb300->lock, flags);
}
return fusb300_ep_release(ep);
}
static struct usb_request *fusb300_alloc_request(struct usb_ep *_ep,
gfp_t gfp_flags)
{
struct fusb300_request *req;
req = kzalloc(sizeof(struct fusb300_request), gfp_flags);
if (!req)
return NULL;
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void fusb300_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
struct fusb300_request *req;
req = container_of(_req, struct fusb300_request, req);
kfree(req);
}
static int enable_fifo_int(struct fusb300_ep *ep)
{
struct fusb300 *fusb300 = ep->fusb300;
if (ep->epnum) {
fusb300_enable_bit(fusb300, FUSB300_OFFSET_IGER0,
FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
} else {
pr_err("can't enable_fifo_int ep0\n");
return -EINVAL;
}
return 0;
}
static int disable_fifo_int(struct fusb300_ep *ep)
{
struct fusb300 *fusb300 = ep->fusb300;
if (ep->epnum) {
fusb300_disable_bit(fusb300, FUSB300_OFFSET_IGER0,
FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
} else {
pr_err("can't disable_fifo_int ep0\n");
return -EINVAL;
}
return 0;
}
static void fusb300_set_cxlen(struct fusb300 *fusb300, u32 length)
{
u32 reg;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
reg &= ~FUSB300_CSR_LEN_MSK;
reg |= FUSB300_CSR_LEN(length);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_CSR);
}
/* write data to cx fifo */
static void fusb300_wrcxf(struct fusb300_ep *ep,
struct fusb300_request *req)
{
int i = 0;
u8 *tmp;
u32 data;
struct fusb300 *fusb300 = ep->fusb300;
u32 length = req->req.length - req->req.actual;
tmp = req->req.buf + req->req.actual;
if (length > SS_CTL_MAX_PACKET_SIZE) {
fusb300_set_cxlen(fusb300, SS_CTL_MAX_PACKET_SIZE);
for (i = (SS_CTL_MAX_PACKET_SIZE >> 2); i > 0; i--) {
data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
*(tmp + 3) << 24;
iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
tmp += 4;
}
req->req.actual += SS_CTL_MAX_PACKET_SIZE;
} else { /* length is less than max packet size */
fusb300_set_cxlen(fusb300, length);
for (i = length >> 2; i > 0; i--) {
data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
*(tmp + 3) << 24;
printk(KERN_DEBUG " 0x%x\n", data);
iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
tmp = tmp + 4;
}
switch (length % 4) {
case 1:
data = *tmp;
printk(KERN_DEBUG " 0x%x\n", data);
iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
break;
case 2:
data = *tmp | *(tmp + 1) << 8;
printk(KERN_DEBUG " 0x%x\n", data);
iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
break;
case 3:
data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
printk(KERN_DEBUG " 0x%x\n", data);
iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
break;
default:
break;
}
req->req.actual += length;
}
}
static void fusb300_set_epnstall(struct fusb300 *fusb300, u8 ep)
{
fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
FUSB300_EPSET0_STL);
}
static void fusb300_clear_epnstall(struct fusb300 *fusb300, u8 ep)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
if (reg & FUSB300_EPSET0_STL) {
printk(KERN_DEBUG "EP%d stall... Clear!!\n", ep);
reg |= FUSB300_EPSET0_STL_CLR;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
}
}
static void ep0_queue(struct fusb300_ep *ep, struct fusb300_request *req)
{
if (ep->fusb300->ep0_dir) { /* if IN */
if (req->req.length) {
fusb300_wrcxf(ep, req);
} else
printk(KERN_DEBUG "%s : req->req.length = 0x%x\n",
__func__, req->req.length);
if ((req->req.length == req->req.actual) ||
(req->req.actual < ep->ep.maxpacket))
done(ep, req, 0);
} else { /* OUT */
if (!req->req.length)
done(ep, req, 0);
else
fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER1,
FUSB300_IGER1_CX_OUT_INT);
}
}
static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
gfp_t gfp_flags)
{
struct fusb300_ep *ep;
struct fusb300_request *req;
unsigned long flags;
int request = 0;
ep = container_of(_ep, struct fusb300_ep, ep);
req = container_of(_req, struct fusb300_request, req);
if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
return -ESHUTDOWN;
spin_lock_irqsave(&ep->fusb300->lock, flags);
if (list_empty(&ep->queue))
request = 1;
list_add_tail(&req->queue, &ep->queue);
req->req.actual = 0;
req->req.status = -EINPROGRESS;
if (ep->ep.desc == NULL) /* ep0 */
ep0_queue(ep, req);
else if (request && !ep->stall)
enable_fifo_int(ep);
spin_unlock_irqrestore(&ep->fusb300->lock, flags);
return 0;
}
static int fusb300_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct fusb300_ep *ep;
struct fusb300_request *req;
unsigned long flags;
ep = container_of(_ep, struct fusb300_ep, ep);
req = container_of(_req, struct fusb300_request, req);
spin_lock_irqsave(&ep->fusb300->lock, flags);
if (!list_empty(&ep->queue))
done(ep, req, -ECONNRESET);
spin_unlock_irqrestore(&ep->fusb300->lock, flags);
return 0;
}
static int fusb300_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
{
struct fusb300_ep *ep;
struct fusb300 *fusb300;
unsigned long flags;
int ret = 0;
ep = container_of(_ep, struct fusb300_ep, ep);
fusb300 = ep->fusb300;
spin_lock_irqsave(&ep->fusb300->lock, flags);
if (!list_empty(&ep->queue)) {
ret = -EAGAIN;
goto out;
}
if (value) {
fusb300_set_epnstall(fusb300, ep->epnum);
ep->stall = 1;
if (wedge)
ep->wedged = 1;
} else {
fusb300_clear_epnstall(fusb300, ep->epnum);
ep->stall = 0;
ep->wedged = 0;
}
out:
spin_unlock_irqrestore(&ep->fusb300->lock, flags);
return ret;
}
static int fusb300_set_halt(struct usb_ep *_ep, int value)
{
return fusb300_set_halt_and_wedge(_ep, value, 0);
}
static int fusb300_set_wedge(struct usb_ep *_ep)
{
return fusb300_set_halt_and_wedge(_ep, 1, 1);
}
static void fusb300_fifo_flush(struct usb_ep *_ep)
{
}
static struct usb_ep_ops fusb300_ep_ops = {
.enable = fusb300_enable,
.disable = fusb300_disable,
.alloc_request = fusb300_alloc_request,
.free_request = fusb300_free_request,
.queue = fusb300_queue,
.dequeue = fusb300_dequeue,
.set_halt = fusb300_set_halt,
.fifo_flush = fusb300_fifo_flush,
.set_wedge = fusb300_set_wedge,
};
/*****************************************************************************/
static void fusb300_clear_int(struct fusb300 *fusb300, u32 offset,
u32 value)
{
iowrite32(value, fusb300->reg + offset);
}
static void fusb300_reset(void)
{
}
static void fusb300_set_cxstall(struct fusb300 *fusb300)
{
fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
FUSB300_CSR_STL);
}
static void fusb300_set_cxdone(struct fusb300 *fusb300)
{
fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
FUSB300_CSR_DONE);
}
/* read data from cx fifo */
static void fusb300_rdcxf(struct fusb300 *fusb300,
u8 *buffer, u32 length)
{
int i = 0;
u8 *tmp;
u32 data;
tmp = buffer;
for (i = (length >> 2); i > 0; i--) {
data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
printk(KERN_DEBUG " 0x%x\n", data);
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
*(tmp + 2) = (data >> 16) & 0xFF;
*(tmp + 3) = (data >> 24) & 0xFF;
tmp = tmp + 4;
}
switch (length % 4) {
case 1:
data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
printk(KERN_DEBUG " 0x%x\n", data);
*tmp = data & 0xFF;
break;
case 2:
data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
printk(KERN_DEBUG " 0x%x\n", data);
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
break;
case 3:
data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
printk(KERN_DEBUG " 0x%x\n", data);
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
*(tmp + 2) = (data >> 16) & 0xFF;
break;
default:
break;
}
}
static void fusb300_rdfifo(struct fusb300_ep *ep,
struct fusb300_request *req,
u32 length)
{
int i = 0;
u8 *tmp;
u32 data, reg;
struct fusb300 *fusb300 = ep->fusb300;
tmp = req->req.buf + req->req.actual;
req->req.actual += length;
if (req->req.actual > req->req.length)
printk(KERN_DEBUG "req->req.actual > req->req.length\n");
for (i = (length >> 2); i > 0; i--) {
data = ioread32(fusb300->reg +
FUSB300_OFFSET_EPPORT(ep->epnum));
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
*(tmp + 2) = (data >> 16) & 0xFF;
*(tmp + 3) = (data >> 24) & 0xFF;
tmp = tmp + 4;
}
switch (length % 4) {
case 1:
data = ioread32(fusb300->reg +
FUSB300_OFFSET_EPPORT(ep->epnum));
*tmp = data & 0xFF;
break;
case 2:
data = ioread32(fusb300->reg +
FUSB300_OFFSET_EPPORT(ep->epnum));
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
break;
case 3:
data = ioread32(fusb300->reg +
FUSB300_OFFSET_EPPORT(ep->epnum));
*tmp = data & 0xFF;
*(tmp + 1) = (data >> 8) & 0xFF;
*(tmp + 2) = (data >> 16) & 0xFF;
break;
default:
break;
}
do {
reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
reg &= FUSB300_IGR1_SYNF0_EMPTY_INT;
if (i)
printk(KERN_INFO "sync fifo is not empty!\n");
i++;
} while (!reg);
}
static u8 fusb300_get_epnstall(struct fusb300 *fusb300, u8 ep)
{
u8 value;
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
value = reg & FUSB300_EPSET0_STL;
return value;
}
static u8 fusb300_get_cxstall(struct fusb300 *fusb300)
{
u8 value;
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
value = (reg & FUSB300_CSR_STL) >> 1;
return value;
}
static void request_error(struct fusb300 *fusb300)
{
fusb300_set_cxstall(fusb300);
printk(KERN_DEBUG "request error!!\n");
}
static void get_status(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
__releases(fusb300->lock)
__acquires(fusb300->lock)
{
u8 ep;
u16 status = 0;
u16 w_index = ctrl->wIndex;
switch (ctrl->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
status = 1 << USB_DEVICE_SELF_POWERED;
break;
case USB_RECIP_INTERFACE:
status = 0;
break;
case USB_RECIP_ENDPOINT:
ep = w_index & USB_ENDPOINT_NUMBER_MASK;
if (ep) {
if (fusb300_get_epnstall(fusb300, ep))
status = 1 << USB_ENDPOINT_HALT;
} else {
if (fusb300_get_cxstall(fusb300))
status = 0;
}
break;
default:
request_error(fusb300);
return; /* exit */
}
fusb300->ep0_data = cpu_to_le16(status);
fusb300->ep0_req->buf = &fusb300->ep0_data;
fusb300->ep0_req->length = 2;
spin_unlock(&fusb300->lock);
fusb300_queue(fusb300->gadget.ep0, fusb300->ep0_req, GFP_KERNEL);
spin_lock(&fusb300->lock);
}
static void set_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
{
u8 ep;
switch (ctrl->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
fusb300_set_cxdone(fusb300);
break;
case USB_RECIP_INTERFACE:
fusb300_set_cxdone(fusb300);
break;
case USB_RECIP_ENDPOINT: {
u16 w_index = le16_to_cpu(ctrl->wIndex);
ep = w_index & USB_ENDPOINT_NUMBER_MASK;
if (ep)
fusb300_set_epnstall(fusb300, ep);
else
fusb300_set_cxstall(fusb300);
fusb300_set_cxdone(fusb300);
}
break;
default:
request_error(fusb300);
break;
}
}
static void fusb300_clear_seqnum(struct fusb300 *fusb300, u8 ep)
{
fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
FUSB300_EPSET0_CLRSEQNUM);
}
static void clear_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
{
struct fusb300_ep *ep =
fusb300->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
switch (ctrl->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
fusb300_set_cxdone(fusb300);
break;
case USB_RECIP_INTERFACE:
fusb300_set_cxdone(fusb300);
break;
case USB_RECIP_ENDPOINT:
if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
if (ep->wedged) {
fusb300_set_cxdone(fusb300);
break;
}
if (ep->stall) {
ep->stall = 0;
fusb300_clear_seqnum(fusb300, ep->epnum);
fusb300_clear_epnstall(fusb300, ep->epnum);
if (!list_empty(&ep->queue))
enable_fifo_int(ep);
}
}
fusb300_set_cxdone(fusb300);
break;
default:
request_error(fusb300);
break;
}
}
static void fusb300_set_dev_addr(struct fusb300 *fusb300, u16 addr)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_DAR);
reg &= ~FUSB300_DAR_DRVADDR_MSK;
reg |= FUSB300_DAR_DRVADDR(addr);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_DAR);
}
static void set_address(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
{
if (ctrl->wValue >= 0x0100)
request_error(fusb300);
else {
fusb300_set_dev_addr(fusb300, ctrl->wValue);
fusb300_set_cxdone(fusb300);
}
}
#define UVC_COPY_DESCRIPTORS(mem, src) \
do { \
const struct usb_descriptor_header * const *__src; \
for (__src = src; *__src; ++__src) { \
memcpy(mem, *__src, (*__src)->bLength); \
mem += (*__src)->bLength; \
} \
} while (0)
static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
{
u8 *p = (u8 *)ctrl;
u8 ret = 0;
u8 i = 0;
fusb300_rdcxf(fusb300, p, 8);
fusb300->ep0_dir = ctrl->bRequestType & USB_DIR_IN;
fusb300->ep0_length = ctrl->wLength;
/* check request */
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
switch (ctrl->bRequest) {
case USB_REQ_GET_STATUS:
get_status(fusb300, ctrl);
break;
case USB_REQ_CLEAR_FEATURE:
clear_feature(fusb300, ctrl);
break;
case USB_REQ_SET_FEATURE:
set_feature(fusb300, ctrl);
break;
case USB_REQ_SET_ADDRESS:
set_address(fusb300, ctrl);
break;
case USB_REQ_SET_CONFIGURATION:
fusb300_enable_bit(fusb300, FUSB300_OFFSET_DAR,
FUSB300_DAR_SETCONFG);
/* clear sequence number */
for (i = 1; i <= FUSB300_MAX_NUM_EP; i++)
fusb300_clear_seqnum(fusb300, i);
fusb300->reenum = 1;
ret = 1;
break;
default:
ret = 1;
break;
}
} else
ret = 1;
return ret;
}
static void done(struct fusb300_ep *ep, struct fusb300_request *req,
int status)
{
list_del_init(&req->queue);
/* don't modify queue heads during completion callback */
if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
req->req.status = -ESHUTDOWN;
else
req->req.status = status;
spin_unlock(&ep->fusb300->lock);
req->req.complete(&ep->ep, &req->req);
spin_lock(&ep->fusb300->lock);
if (ep->epnum) {
disable_fifo_int(ep);
if (!list_empty(&ep->queue))
enable_fifo_int(ep);
} else
fusb300_set_cxdone(ep->fusb300);
}
static void fusb300_fill_idma_prdtbl(struct fusb300_ep *ep, dma_addr_t d,
u32 len)
{
u32 value;
u32 reg;
/* wait SW owner */
do {
reg = ioread32(ep->fusb300->reg +
FUSB300_OFFSET_EPPRD_W0(ep->epnum));
reg &= FUSB300_EPPRD0_H;
} while (reg);
iowrite32(d, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W1(ep->epnum));
value = FUSB300_EPPRD0_BTC(len) | FUSB300_EPPRD0_H |
FUSB300_EPPRD0_F | FUSB300_EPPRD0_L | FUSB300_EPPRD0_I;
iowrite32(value, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W0(ep->epnum));
iowrite32(0x0, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W2(ep->epnum));
fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_EPPRDRDY,
FUSB300_EPPRDR_EP_PRD_RDY(ep->epnum));
}
static void fusb300_wait_idma_finished(struct fusb300_ep *ep)
{
u32 reg;
do {
reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR1);
if ((reg & FUSB300_IGR1_VBUS_CHG_INT) ||
(reg & FUSB300_IGR1_WARM_RST_INT) ||
(reg & FUSB300_IGR1_HOT_RST_INT) ||
(reg & FUSB300_IGR1_USBRST_INT)
)
goto IDMA_RESET;
reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR0);
reg &= FUSB300_IGR0_EPn_PRD_INT(ep->epnum);
} while (!reg);
fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGR0,
FUSB300_IGR0_EPn_PRD_INT(ep->epnum));
return;
IDMA_RESET:
reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGER0);
reg &= ~FUSB300_IGER0_EEPn_PRD_INT(ep->epnum);
iowrite32(reg, ep->fusb300->reg + FUSB300_OFFSET_IGER0);
}
static void fusb300_set_idma(struct fusb300_ep *ep,
struct fusb300_request *req)
{
int ret;
ret = usb_gadget_map_request(&ep->fusb300->gadget,
&req->req, DMA_TO_DEVICE);
if (ret)
return;
fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER0,
FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
fusb300_fill_idma_prdtbl(ep, req->req.dma, req->req.length);
/* check idma is done */
fusb300_wait_idma_finished(ep);
usb_gadget_unmap_request(&ep->fusb300->gadget,
&req->req, DMA_TO_DEVICE);
}
static void in_ep_fifo_handler(struct fusb300_ep *ep)
{
struct fusb300_request *req = list_entry(ep->queue.next,
struct fusb300_request, queue);
if (req->req.length)
fusb300_set_idma(ep, req);
done(ep, req, 0);
}
static void out_ep_fifo_handler(struct fusb300_ep *ep)
{
struct fusb300 *fusb300 = ep->fusb300;
struct fusb300_request *req = list_entry(ep->queue.next,
struct fusb300_request, queue);
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPFFR(ep->epnum));
u32 length = reg & FUSB300_FFR_BYCNT;
fusb300_rdfifo(ep, req, length);
/* finish out transfer */
if ((req->req.length == req->req.actual) || (length < ep->ep.maxpacket))
done(ep, req, 0);
}
static void check_device_mode(struct fusb300 *fusb300)
{
u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_GCR);
switch (reg & FUSB300_GCR_DEVEN_MSK) {
case FUSB300_GCR_DEVEN_SS:
fusb300->gadget.speed = USB_SPEED_SUPER;
break;
case FUSB300_GCR_DEVEN_HS:
fusb300->gadget.speed = USB_SPEED_HIGH;
break;
case FUSB300_GCR_DEVEN_FS:
fusb300->gadget.speed = USB_SPEED_FULL;
break;
default:
fusb300->gadget.speed = USB_SPEED_UNKNOWN;
break;
}
printk(KERN_INFO "dev_mode = %d\n", (reg & FUSB300_GCR_DEVEN_MSK));
}
static void fusb300_ep0out(struct fusb300 *fusb300)
{
struct fusb300_ep *ep = fusb300->ep[0];
u32 reg;
if (!list_empty(&ep->queue)) {
struct fusb300_request *req;
req = list_first_entry(&ep->queue,
struct fusb300_request, queue);
if (req->req.length)
fusb300_rdcxf(ep->fusb300, req->req.buf,
req->req.length);
done(ep, req, 0);
reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
reg &= ~FUSB300_IGER1_CX_OUT_INT;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_IGER1);
} else
pr_err("%s : empty queue\n", __func__);
}
static void fusb300_ep0in(struct fusb300 *fusb300)
{
struct fusb300_request *req;
struct fusb300_ep *ep = fusb300->ep[0];
if ((!list_empty(&ep->queue)) && (fusb300->ep0_dir)) {
req = list_entry(ep->queue.next,
struct fusb300_request, queue);
if (req->req.length)
fusb300_wrcxf(ep, req);
if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
done(ep, req, 0);
} else
fusb300_set_cxdone(fusb300);
}
static void fusb300_grp2_handler(void)
{
}
static void fusb300_grp3_handler(void)
{
}
static void fusb300_grp4_handler(void)
{
}
static void fusb300_grp5_handler(void)
{
}
static irqreturn_t fusb300_irq(int irq, void *_fusb300)
{
struct fusb300 *fusb300 = _fusb300;
u32 int_grp1 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
u32 int_grp1_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
u32 int_grp0 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR0);
u32 int_grp0_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER0);
struct usb_ctrlrequest ctrl;
u8 in;
u32 reg;
int i;
spin_lock(&fusb300->lock);
int_grp1 &= int_grp1_en;
int_grp0 &= int_grp0_en;
if (int_grp1 & FUSB300_IGR1_WARM_RST_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_WARM_RST_INT);
printk(KERN_INFO"fusb300_warmreset\n");
fusb300_reset();
}
if (int_grp1 & FUSB300_IGR1_HOT_RST_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_HOT_RST_INT);
printk(KERN_INFO"fusb300_hotreset\n");
fusb300_reset();
}
if (int_grp1 & FUSB300_IGR1_USBRST_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_USBRST_INT);
fusb300_reset();
}
/* COMABT_INT has a highest priority */
if (int_grp1 & FUSB300_IGR1_CX_COMABT_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_CX_COMABT_INT);
printk(KERN_INFO"fusb300_ep0abt\n");
}
if (int_grp1 & FUSB300_IGR1_VBUS_CHG_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_VBUS_CHG_INT);
printk(KERN_INFO"fusb300_vbus_change\n");
}
if (int_grp1 & FUSB300_IGR1_U3_EXIT_FAIL_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U3_EXIT_FAIL_INT);
}
if (int_grp1 & FUSB300_IGR1_U2_EXIT_FAIL_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U2_EXIT_FAIL_INT);
}
if (int_grp1 & FUSB300_IGR1_U1_EXIT_FAIL_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U1_EXIT_FAIL_INT);
}
if (int_grp1 & FUSB300_IGR1_U2_ENTRY_FAIL_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U2_ENTRY_FAIL_INT);
}
if (int_grp1 & FUSB300_IGR1_U1_ENTRY_FAIL_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U1_ENTRY_FAIL_INT);
}
if (int_grp1 & FUSB300_IGR1_U3_EXIT_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U3_EXIT_INT);
printk(KERN_INFO "FUSB300_IGR1_U3_EXIT_INT\n");
}
if (int_grp1 & FUSB300_IGR1_U2_EXIT_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U2_EXIT_INT);
printk(KERN_INFO "FUSB300_IGR1_U2_EXIT_INT\n");
}
if (int_grp1 & FUSB300_IGR1_U1_EXIT_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U1_EXIT_INT);
printk(KERN_INFO "FUSB300_IGR1_U1_EXIT_INT\n");
}
if (int_grp1 & FUSB300_IGR1_U3_ENTRY_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U3_ENTRY_INT);
printk(KERN_INFO "FUSB300_IGR1_U3_ENTRY_INT\n");
fusb300_enable_bit(fusb300, FUSB300_OFFSET_SSCR1,
FUSB300_SSCR1_GO_U3_DONE);
}
if (int_grp1 & FUSB300_IGR1_U2_ENTRY_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U2_ENTRY_INT);
printk(KERN_INFO "FUSB300_IGR1_U2_ENTRY_INT\n");
}
if (int_grp1 & FUSB300_IGR1_U1_ENTRY_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_U1_ENTRY_INT);
printk(KERN_INFO "FUSB300_IGR1_U1_ENTRY_INT\n");
}
if (int_grp1 & FUSB300_IGR1_RESM_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_RESM_INT);
printk(KERN_INFO "fusb300_resume\n");
}
if (int_grp1 & FUSB300_IGR1_SUSP_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_SUSP_INT);
printk(KERN_INFO "fusb300_suspend\n");
}
if (int_grp1 & FUSB300_IGR1_HS_LPM_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_HS_LPM_INT);
printk(KERN_INFO "fusb300_HS_LPM_INT\n");
}
if (int_grp1 & FUSB300_IGR1_DEV_MODE_CHG_INT) {
fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
FUSB300_IGR1_DEV_MODE_CHG_INT);
check_device_mode(fusb300);
}
if (int_grp1 & FUSB300_IGR1_CX_COMFAIL_INT) {
fusb300_set_cxstall(fusb300);
printk(KERN_INFO "fusb300_ep0fail\n");
}
if (int_grp1 & FUSB300_IGR1_CX_SETUP_INT) {
printk(KERN_INFO "fusb300_ep0setup\n");
if (setup_packet(fusb300, &ctrl)) {
spin_unlock(&fusb300->lock);
if (fusb300->driver->setup(&fusb300->gadget, &ctrl) < 0)
fusb300_set_cxstall(fusb300);
spin_lock(&fusb300->lock);
}
}
if (int_grp1 & FUSB300_IGR1_CX_CMDEND_INT)
printk(KERN_INFO "fusb300_cmdend\n");
if (int_grp1 & FUSB300_IGR1_CX_OUT_INT) {
printk(KERN_INFO "fusb300_cxout\n");
fusb300_ep0out(fusb300);
}
if (int_grp1 & FUSB300_IGR1_CX_IN_INT) {
printk(KERN_INFO "fusb300_cxin\n");
fusb300_ep0in(fusb300);
}
if (int_grp1 & FUSB300_IGR1_INTGRP5)
fusb300_grp5_handler();
if (int_grp1 & FUSB300_IGR1_INTGRP4)
fusb300_grp4_handler();
if (int_grp1 & FUSB300_IGR1_INTGRP3)
fusb300_grp3_handler();
if (int_grp1 & FUSB300_IGR1_INTGRP2)
fusb300_grp2_handler();
if (int_grp0) {
for (i = 1; i < FUSB300_MAX_NUM_EP; i++) {
if (int_grp0 & FUSB300_IGR0_EPn_FIFO_INT(i)) {
reg = ioread32(fusb300->reg +
FUSB300_OFFSET_EPSET1(i));
in = (reg & FUSB300_EPSET1_DIRIN) ? 1 : 0;
if (in)
in_ep_fifo_handler(fusb300->ep[i]);
else
out_ep_fifo_handler(fusb300->ep[i]);
}
}
}
spin_unlock(&fusb300->lock);
return IRQ_HANDLED;
}
static void fusb300_set_u2_timeout(struct fusb300 *fusb300,
u32 time)
{
u32 reg;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
reg &= ~0xff;
reg |= FUSB300_SSCR2_U2TIMEOUT(time);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
}
static void fusb300_set_u1_timeout(struct fusb300 *fusb300,
u32 time)
{
u32 reg;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
reg &= ~(0xff << 8);
reg |= FUSB300_SSCR2_U1TIMEOUT(time);
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
}
static void init_controller(struct fusb300 *fusb300)
{
u32 reg;
u32 mask = 0;
u32 val = 0;
/* split on */
mask = val = FUSB300_AHBBCR_S0_SPLIT_ON | FUSB300_AHBBCR_S1_SPLIT_ON;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_AHBCR);
reg &= ~mask;
reg |= val;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_AHBCR);
/* enable high-speed LPM */
mask = val = FUSB300_HSCR_HS_LPM_PERMIT;
reg = ioread32(fusb300->reg + FUSB300_OFFSET_HSCR);
reg &= ~mask;
reg |= val;
iowrite32(reg, fusb300->reg + FUSB300_OFFSET_HSCR);
/*set u1 u2 timmer*/
fusb300_set_u2_timeout(fusb300, 0xff);
fusb300_set_u1_timeout(fusb300, 0xff);
/* enable all grp1 interrupt */
iowrite32(0xcfffff9f, fusb300->reg + FUSB300_OFFSET_IGER1);
}
/*------------------------------------------------------------------------*/
static int fusb300_udc_start(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct fusb300 *fusb300 = to_fusb300(g);
/* hook up the driver */
driver->driver.bus = NULL;
fusb300->driver = driver;
return 0;
}
static int fusb300_udc_stop(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct fusb300 *fusb300 = to_fusb300(g);
driver->unbind(&fusb300->gadget);
init_controller(fusb300);
fusb300->driver = NULL;
return 0;
}
/*--------------------------------------------------------------------------*/
static int fusb300_udc_pullup(struct usb_gadget *_gadget, int is_active)
{
return 0;
}
static const struct usb_gadget_ops fusb300_gadget_ops = {
.pullup = fusb300_udc_pullup,
.udc_start = fusb300_udc_start,
.udc_stop = fusb300_udc_stop,
};
static int __exit fusb300_remove(struct platform_device *pdev)
{
struct fusb300 *fusb300 = platform_get_drvdata(pdev);
usb_del_gadget_udc(&fusb300->gadget);
iounmap(fusb300->reg);
free_irq(platform_get_irq(pdev, 0), fusb300);
fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
kfree(fusb300);
return 0;
}
static int __init fusb300_probe(struct platform_device *pdev)
{
struct resource *res, *ires, *ires1;
void __iomem *reg = NULL;
struct fusb300 *fusb300 = NULL;
struct fusb300_ep *_ep[FUSB300_MAX_NUM_EP];
int ret = 0;
int i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
pr_err("platform_get_resource error.\n");
goto clean_up;
}
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!ires) {
ret = -ENODEV;
dev_err(&pdev->dev,
"platform_get_resource IORESOURCE_IRQ error.\n");
goto clean_up;
}
ires1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
if (!ires1) {
ret = -ENODEV;
dev_err(&pdev->dev,
"platform_get_resource IORESOURCE_IRQ 1 error.\n");
goto clean_up;
}
reg = ioremap(res->start, resource_size(res));
if (reg == NULL) {
ret = -ENOMEM;
pr_err("ioremap error.\n");
goto clean_up;
}
/* initialize udc */
fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
if (fusb300 == NULL)
goto clean_up;
for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
_ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
if (_ep[i] == NULL)
goto clean_up;
fusb300->ep[i] = _ep[i];
}
spin_lock_init(&fusb300->lock);
platform_set_drvdata(pdev, fusb300);
fusb300->gadget.ops = &fusb300_gadget_ops;
fusb300->gadget.max_speed = USB_SPEED_HIGH;
fusb300->gadget.name = udc_name;
fusb300->reg = reg;
ret = request_irq(ires->start, fusb300_irq, IRQF_SHARED,
udc_name, fusb300);
if (ret < 0) {
pr_err("request_irq error (%d)\n", ret);
goto clean_up;
}
ret = request_irq(ires1->start, fusb300_irq,
IRQF_SHARED, udc_name, fusb300);
if (ret < 0) {
pr_err("request_irq1 error (%d)\n", ret);
goto clean_up;
}
INIT_LIST_HEAD(&fusb300->gadget.ep_list);
for (i = 0; i < FUSB300_MAX_NUM_EP ; i++) {
struct fusb300_ep *ep = fusb300->ep[i];
if (i != 0) {
INIT_LIST_HEAD(&fusb300->ep[i]->ep.ep_list);
list_add_tail(&fusb300->ep[i]->ep.ep_list,
&fusb300->gadget.ep_list);
}
ep->fusb300 = fusb300;
INIT_LIST_HEAD(&ep->queue);
ep->ep.name = fusb300_ep_name[i];
ep->ep.ops = &fusb300_ep_ops;
usb_ep_set_maxpacket_limit(&ep->ep, HS_BULK_MAX_PACKET_SIZE);
}
usb_ep_set_maxpacket_limit(&fusb300->ep[0]->ep, HS_CTL_MAX_PACKET_SIZE);
fusb300->ep[0]->epnum = 0;
fusb300->gadget.ep0 = &fusb300->ep[0]->ep;
INIT_LIST_HEAD(&fusb300->gadget.ep0->ep_list);
fusb300->ep0_req = fusb300_alloc_request(&fusb300->ep[0]->ep,
GFP_KERNEL);
if (fusb300->ep0_req == NULL) {
ret = -ENOMEM;
goto clean_up3;
}
init_controller(fusb300);
ret = usb_add_gadget_udc(&pdev->dev, &fusb300->gadget);
if (ret)
goto err_add_udc;
dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
return 0;
err_add_udc:
fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
clean_up3:
free_irq(ires->start, fusb300);
clean_up:
if (fusb300) {
if (fusb300->ep0_req)
fusb300_free_request(&fusb300->ep[0]->ep,
fusb300->ep0_req);
kfree(fusb300);
}
if (reg)
iounmap(reg);
return ret;
}
static struct platform_driver fusb300_driver = {
.remove = __exit_p(fusb300_remove),
.driver = {
.name = (char *) udc_name,
.owner = THIS_MODULE,
},
};
module_platform_driver_probe(fusb300_driver, fusb300_probe);
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