bkgpl/cyb4_linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
cyb4_linux/drivers/usb/gadget/s3c-udc-fs.c

1902 lines
45 KiB
C
Raw Blame History

/*
* linux/drivers/usb/gadget/s3c24x0_udc.c
* Samsung S3C24X0 on-chip full speed USB device controllers
*
* Copyright (C) 2005 for Samsung Electronics
* - by Jaswinder Singh Brar <jassi@samsung.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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "s3c-udc.h"
#include <linux/platform_device.h>
#define GPIO_INIT do{ \
u32 val; \
val = __raw_readl(S3C_GPFCON); \
val &= ~(3<<4); \
val |= (1<<4); \
__raw_writel(val, S3C_GPFCON); \
val = __raw_readl(S3C_GPFDN); \
val |= (1<<2); \
__raw_writel(val, S3C_GPFDN); \
val = __raw_readl(S3C_GPFDAT); \
val &= ~(1<<2); \
__raw_writel(val, S3C_GPFDAT); \
}while(0)
#define GPIO_DEINIT do{ \
u32 val; \
val = __raw_readl(S3C_GPFCON); \
val &= ~(3<<4); \
__raw_writel(val, S3C_GPFCON); \
val = __raw_readl(S3C_GPFDN); \
val &= ~(1<<2); \
__raw_writel(val, S3C_GPFDN); \
val = __raw_readl(S3C_GPFDAT); \
val &= ~(1<<2); \
__raw_writel(val, S3C_GPFDAT); \
}while(0)
#define GPIO_ENABLE do{ \
u32 val; \
val = __raw_readl(S3C_GPFDAT); \
val |= (1<<2); \
__raw_writel(val, S3C_GPFDAT); \
}while(0)
#define GPIO_DISABLE do{ \
u32 val; \
val = __raw_readl(S3C_GPFDAT); \
val &= ~(1<<2); \
__raw_writel(val, S3C_GPFDAT); \
}while(0)
#ifndef DEBUG_EP0
# define DEBUG_EP0(fmt,args...)
#endif
#ifndef DEBUG_SETUP
# define DEBUG_SETUP(fmt,args...)
#endif
#ifndef DEBUG
# define NO_STATES
# define DEBUG(fmt,args...)
#endif
//#define DEBUG_EP0 printk
//#define DEBUG_SETUP printk
#define DRIVER_DESC "Samsung USB Full/High speed Device Controller"
#define DRIVER_VERSION __DATE__
#ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */
#define _BIT(x) (1<<(x))
#endif
struct s3c_udc *the_controller;
static struct clk *udc_clock;
static const char driver_name[] = "s3c-udc";
static const char driver_desc[] = DRIVER_DESC;
static const char ep0name[] = "ep0-control";
/*
Local definintions.
*/
static char *state_names[] = {
"WAIT_FOR_SETUP",
"DATA_STATE_XMIT",
"DATA_STATE_NEED_ZLP",
"WAIT_FOR_OUT_STATUS",
"DATA_STATE_RECV"
};
/*
Local declarations.
*/
static int s3c_ep_enable(struct usb_ep *ep,
const struct usb_endpoint_descriptor *);
static int s3c_ep_disable(struct usb_ep *ep);
static struct usb_request *s3c_alloc_request(struct usb_ep *ep, int);
static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
static void *s3c_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *,
int);
static void s3c_free_buffer(struct usb_ep *ep, void *, dma_addr_t,
unsigned);
static int s3c_queue(struct usb_ep *ep, struct usb_request *, int);
static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
static int s3c_set_halt(struct usb_ep *ep, int);
static int s3c_fifo_status(struct usb_ep *ep);
static void s3c_fifo_flush(struct usb_ep *ep);
static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
static void s3c_handle_ep0(struct s3c_udc *dev);
static void done(struct s3c_ep *ep, struct s3c_request *req,
int status);
static void stop_activity(struct s3c_udc *dev,
struct usb_gadget_driver *driver);
static int udc_enable(struct s3c_udc *dev);
static void udc_set_address(struct s3c_udc *dev, unsigned char address);
static void reconfig_usbd(void);
static __inline__ u32 usb_read(u32 port, u8 ind)
{
__raw_writel(ind, S3C_UDC_INDEX_REG);
return __raw_readl(port);
}
static __inline__ void usb_write(u32 val, u32 port, u8 ind)
{
__raw_writel(ind, S3C_UDC_INDEX_REG);
__raw_writel(val, port);
}
static __inline__ void usb_set(u32 val, u32 port, u8 ind)
{
__raw_writel(ind, S3C_UDC_INDEX_REG);
__raw_writel(__raw_readl(port) | val, port);
}
static __inline__ void usb_clear(u32 val, u32 port, u8 ind)
{
__raw_writel(ind, S3C_UDC_INDEX_REG);
__raw_writel(__raw_readl(port) & ~val, port);
}
static struct usb_ep_ops s3c_ep_ops = {
.enable = s3c_ep_enable,
.disable = s3c_ep_disable,
.alloc_request = s3c_alloc_request,
.free_request = s3c_free_request,
.alloc_buffer = s3c_alloc_buffer,
.free_buffer = s3c_free_buffer,
.queue = s3c_queue,
.dequeue = s3c_dequeue,
.set_halt = s3c_set_halt,
.fifo_status = s3c_fifo_status,
.fifo_flush = s3c_fifo_flush,
};
/* Inline code */
static __inline__ int write_packet(struct s3c_ep *ep,
struct s3c_request *req, int max)
{
u8 *buf;
int length, count;
u32 fifo = ep->fifo;
buf = req->req.buf + req->req.actual;
prefetch(buf);
length = req->req.length - req->req.actual;
length = min(length, max);
req->req.actual += length;
DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo);
count = length;
while (count--)
__raw_writel(*buf++, fifo);
return length;
}
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
static const char proc_node_name[] = "driver/udc";
static int
udc_proc_read(char *page, char **start, off_t off, int count,
int *eof, void *_dev)
{
char *buf = page;
struct s3c_udc *dev = _dev;
char *next = buf;
unsigned size = count;
unsigned long flags;
int t;
if (off != 0)
return 0;
local_irq_save(flags);
/* basic device status */
t = scnprintf(next, size,
DRIVER_DESC "\n"
"%s version: %s\n"
"Gadget driver: %s\n"
"\n",
driver_name, DRIVER_VERSION,
dev->driver ? dev->driver->driver.name : "(none)");
size -= t;
next += t;
local_irq_restore(flags);
*eof = 1;
return count - size;
}
#define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
#define remove_proc_files() remove_proc_entry(proc_node_name, NULL)
#else /* !CONFIG_USB_GADGET_DEBUG_FILES */
#define create_proc_files() do {} while (0)
#define remove_proc_files() do {} while (0)
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
/*
* udc_disable - disable USB device controller
*/
static void udc_disable(struct s3c_udc *dev)
{
DEBUG("%s, %p\n", __FUNCTION__, dev);
udc_set_address(dev, 0);
if (udc_clock) {
clk_disable(udc_clock);
//clk_unuse(udc_clock);
clk_put(udc_clock);
udc_clock = NULL;
}
dev->ep0state = WAIT_FOR_SETUP;
dev->gadget.speed = USB_SPEED_UNKNOWN;
dev->usb_address = 0;
}
/*
* udc_reinit - initialize software state
*/
static void udc_reinit(struct s3c_udc *dev)
{
u32 i;
DEBUG("%s, %p\n", __FUNCTION__, dev);
/* device/ep0 records init */
INIT_LIST_HEAD(&dev->gadget.ep_list);
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
dev->ep0state = WAIT_FOR_SETUP;
/* basic endpoint records init */
for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
struct s3c_ep *ep = &dev->ep[i];
if (i != 0)
list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
ep->desc = 0;
ep->stopped = 0;
INIT_LIST_HEAD(&ep->queue);
ep->pio_irqs = 0;
}
/* the rest was statically initialized, and is read-only */
}
#define BYTES2MAXP(x) (x / 8)
#define MAXP2BYTES(x) (x * 8)
/* until it's enabled, this UDC should be completely invisible
* to any USB host.
*/
static int udc_enable(struct s3c_udc *dev)
{
u32 val;
DEBUG("%s, %p\n", __FUNCTION__, dev);
dev->gadget.speed = USB_SPEED_UNKNOWN;
val = usb_read(S3C_MISCCR, 0);
val &= ~((1<<3)|(1<<13)); // USB Device in Normal mode
usb_write(val, S3C_MISCCR, 0);
/* Enable Clock */
udc_clock = clk_get(NULL, "usb-device");
if (!udc_clock) {
printk("failed to get udc clock source\n");
return -ENOENT;
}
//clk_use(udc_clock);
clk_enable(udc_clock);
val = (1<<0);
usb_write(val, S3C_UDC_EP_INT_REG, 0); //clear
val = (1<<2); //UD_USBINTE_RESET
usb_write(val, S3C_UDC_USB_INT_REG, 0); //clear
/* Set MAXP values for each */
usb_write(dev->ep[0].ep.maxpacket>>3, S3C_UDC_MAXP_REG, 0);
usb_write(dev->ep[1].ep.maxpacket>>3, S3C_UDC_MAXP_REG, 1);
usb_write(dev->ep[2].ep.maxpacket>>3, S3C_UDC_MAXP_REG, 2);
usb_write(dev->ep[3].ep.maxpacket>>3, S3C_UDC_MAXP_REG, 3);
usb_write(dev->ep[4].ep.maxpacket>>3, S3C_UDC_MAXP_REG, 4);
return 0;
}
/*
Register entry point for the peripheral controller driver.
*/
int usb_gadget_register_driver(struct usb_gadget_driver *driver)
{
struct s3c_udc *dev = the_controller;
int retval;
DEBUG("%s: %s\n", __FUNCTION__, driver->driver.name);
if (!driver
|| driver->speed != USB_SPEED_FULL
|| !driver->bind
|| !driver->unbind || !driver->disconnect || !driver->setup)
return -EINVAL;
if (!dev)
return -ENODEV;
if (dev->driver)
return -EBUSY;
/* first hook up the driver ... */
dev->driver = driver;
dev->gadget.dev.driver = &driver->driver;
device_add(&dev->gadget.dev);
retval = driver->bind(&dev->gadget);
if (retval) {
printk("%s: bind to driver %s --> error %d\n", dev->gadget.name,
driver->driver.name, retval);
device_del(&dev->gadget.dev);
dev->driver = 0;
dev->gadget.dev.driver = 0;
return retval;
}
reconfig_usbd();
enable_irq(IRQ_USBD);
printk("Registered gadget driver '%s'\n", driver->driver.name);
GPIO_ENABLE;
return 0;
}
EXPORT_SYMBOL(usb_gadget_register_driver);
/*
Unregister entry point for the peripheral controller driver.
*/
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
{
struct s3c_udc *dev = the_controller;
unsigned long flags;
GPIO_DISABLE;
if (!dev)
return -ENODEV;
if (!driver || driver != dev->driver)
return -EINVAL;
spin_lock_irqsave(&dev->lock, flags);
dev->driver = 0;
stop_activity(dev, driver);
spin_unlock_irqrestore(&dev->lock, flags);
driver->unbind(&dev->gadget);
device_del(&dev->gadget.dev);
disable_irq(IRQ_USBD);
printk("Unregistered gadget driver '%s'\n", driver->driver.name);
return 0;
}
EXPORT_SYMBOL(usb_gadget_unregister_driver);
/*-------------------------------------------------------------------------*/
/** Write request to FIFO (max write == maxp size)
* Return: 0 = still running, 1 = completed, negative = errno
*/
static int write_fifo(struct s3c_ep *ep, struct s3c_request *req)
{
u32 max;
unsigned count;
int is_last, is_short;
max = le16_to_cpu(ep->desc->wMaxPacketSize);
count = write_packet(ep, req, max);
/* last packet is usually short (or a zlp) */
if (unlikely(count != max))
is_last = is_short = 1;
else {
if (likely(req->req.length != req->req.actual)
|| req->req.zero)
is_last = 0;
else
is_last = 1;
/* interrupt/iso maxpacket may not fill the fifo */
is_short = unlikely(max < ep_maxpacket(ep));
}
/* requests complete when all IN data is in the FIFO */
if (is_last) {
if(!ep_index(ep)){ // EP0 must not come here
BUG();
//usb_set(S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_DE,
// S3C_UDC_EP0_CSR_REG, 0);
}else{
usb_set(S3C_UDC_ICSR1_PKTRDY, ep->csr1, ep_index(ep));
}
done(ep, req, 0);
return 1;
} else{
usb_set(S3C_UDC_ICSR1_PKTRDY, ep->csr1, ep_index(ep));
}
DEBUG_EP0("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__,
ep->ep.name, count,
is_last ? "/L" : "", is_short ? "/S" : "",
req->req.length - req->req.actual, req);
return 0;
}
/** Read to request from FIFO (max read == bytes in fifo)
* Return: 0 = still running, 1 = completed, negative = errno
*/
static int read_fifo(struct s3c_ep *ep, struct s3c_request *req)
{
u32 csr;
u8 *buf;
unsigned bufferspace, count, is_short;
u32 fifo = ep->fifo;
/* make sure there's a packet in the FIFO. */
csr = usb_read(ep->csr1, ep_index(ep));
if (!(csr & S3C_UDC_OCSR1_PKTRDY)) {
DEBUG("%s: Packet NOT ready!\n", __FUNCTION__);
return -EINVAL;
}
buf = req->req.buf + req->req.actual;
prefetchw(buf);
bufferspace = req->req.length - req->req.actual;
/* read all bytes from this packet */
count = (( (usb_read(S3C_UDC_OUT_FIFO_CNT2_REG, ep_index(ep)) & 0xff ) << 8) | (usb_read(S3C_UDC_OUT_FIFO_CNT1_REG, ep_index(ep)) & 0xff));
req->req.actual += min(count, bufferspace);
is_short = (count < ep->ep.maxpacket);
DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
ep->ep.name, csr, count,
is_short ? "/S" : "", req, req->req.actual, req->req.length);
while (likely(count-- != 0)) {
u8 byte = (u8) __raw_readl(fifo);
if (unlikely(bufferspace == 0)) {
/* this happens when the driver's buffer
* is smaller than what the host sent.
* discard the extra data.
*/
if (req->req.status != -EOVERFLOW)
printk("%s overflow %d\n", ep->ep.name, count);
req->req.status = -EOVERFLOW;
} else {
*buf++ = byte;
bufferspace--;
}
}
usb_clear(S3C_UDC_OCSR1_PKTRDY, ep->csr1, ep_index(ep));
/* completion */
if (is_short || req->req.actual == req->req.length) {
done(ep, req, 0);
return 1;
}
/* finished that packet. the next one may be waiting... */
return 0;
}
/*
* done - retire a request; caller blocked irqs
*/
static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
{
unsigned int stopped = ep->stopped;
DEBUG("%s, %p\n", __FUNCTION__, ep);
list_del_init(&req->queue);
if (likely(req->req.status == -EINPROGRESS))
req->req.status = status;
else
status = req->req.status;
if (status && status != -ESHUTDOWN)
DEBUG("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(&ep->dev->lock);
req->req.complete(&ep->ep, &req->req);
spin_lock(&ep->dev->lock);
ep->stopped = stopped;
}
/*
* nuke - dequeue ALL requests
*/
void nuke(struct s3c_ep *ep, int status)
{
struct s3c_request *req;
DEBUG("%s, %p\n", __FUNCTION__, ep);
/* called with irqs blocked */
while (!list_empty(&ep->queue)) {
req = list_entry(ep->queue.next, struct s3c_request, queue);
done(ep, req, status);
}
}
/**
* s3c_in_epn - handle IN interrupt
*/
static void s3c_in_epn(struct s3c_udc *dev, u32 ep_idx)
{
u32 csr;
struct s3c_ep *ep = &dev->ep[ep_idx];
struct s3c_request *req;
csr = usb_read(ep->csr1, ep_index(ep));
DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr);
if (csr & S3C_UDC_ICSR1_SENTSTL) {
printk("S3C_UDC_ICSR1_SENTSTL\n");
usb_set(S3C_UDC_ICSR1_SENTSTL /*| S3C_UDC_ICSR1_SENDSTL */ ,
ep->csr1, ep_index(ep));
return;
}
if (!ep->desc) {
DEBUG("%s: NO EP DESC\n", __FUNCTION__);
return;
}
if (list_empty(&ep->queue))
req = 0;
else
req = list_entry(ep->queue.next, struct s3c_request, queue);
DEBUG("req: %p\n", req);
if (!req)
return;
write_fifo(ep, req);
}
/* ********************************************************************************************* */
/* Bulk OUT (recv)
*/
static void s3c_out_epn(struct s3c_udc *dev, u32 ep_idx)
{
struct s3c_ep *ep = &dev->ep[ep_idx];
struct s3c_request *req;
DEBUG("%s: %d\n", __FUNCTION__, ep_idx);
if (ep->desc) {
u32 csr;
csr = usb_read(ep->csr1, ep_index(ep));
while ((csr = usb_read(ep->csr1, ep_index(ep)))
& (S3C_UDC_OCSR1_PKTRDY | S3C_UDC_OCSR1_SENTSTL)) {
DEBUG("%s: %x\n", __FUNCTION__, csr);
if (csr & S3C_UDC_OCSR1_SENTSTL) {
DEBUG("%s: stall sent, flush fifo\n",
__FUNCTION__);
/* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1, ep_index(ep)); */
} else if (csr & S3C_UDC_OCSR1_PKTRDY) {
if (list_empty(&ep->queue))
req = 0;
else
req = list_entry(ep->queue.next,
struct s3c_request, queue);
if (!req) {
//printk("%s: NULL REQ %d\n",
// __FUNCTION__, ep_idx);
break;
} else {
read_fifo(ep, req);
}
}
}
} else {
/* Throw packet away.. */
printk("%s: No descriptor?!?\n", __FUNCTION__);
}
}
static void stop_activity(struct s3c_udc *dev,
struct usb_gadget_driver *driver)
{
int i;
/* don't disconnect drivers more than once */
if (dev->gadget.speed == USB_SPEED_UNKNOWN)
driver = 0;
dev->gadget.speed = USB_SPEED_UNKNOWN;
/* prevent new request submissions, kill any outstanding requests */
for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
struct s3c_ep *ep = &dev->ep[i];
ep->stopped = 1;
nuke(ep, -ESHUTDOWN);
}
/* report disconnect; the driver is already quiesced */
if (driver) {
spin_unlock(&dev->lock);
driver->disconnect(&dev->gadget);
spin_lock(&dev->lock);
}
/* re-init driver-visible data structures */
udc_reinit(dev);
}
static void reconfig_usbd(void)
{
u32 val;
usb_write(0, S3C_UDC_PWR_REG, 0);
/* EP0 */
val = EP0_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 0);
val = (1<<6)|(1<<7); //EP0_CSR_SOPKTRDY | EP0_CSR_SSE;
usb_write(val, S3C_UDC_EP0_CSR_REG, 0);
/* EP3 -- INT */
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 3);
val = (1<<6)|(1<<3); //UD_ICSR1_FFLUSH | UD_ICSR1_CLRDT;
usb_write(val, S3C_UDC_IN_CSR1_REG, 3);
val = (1<<5)|(1<<4); //UD_ICSR2_MODEIN | UD_ICSR2_DMAIEN;
usb_write(val, S3C_UDC_IN_CSR2_REG, 3);
/* EP2 -- IN */
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 2);
val = (1<<6)|(1<<3); //UD_ICSR1_FFLUSH | UD_ICSR1_CLRDT;
usb_write(val, S3C_UDC_IN_CSR1_REG, 2);
val = (1<<5)|(1<<4); //UD_ICSR2_MODEIN | UD_ICSR2_DMAIEN;
usb_write(val, S3C_UDC_IN_CSR2_REG, 2);
/* EP1 -- OUT */
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 1);
val = (1<<6)|(1<<3); //UD_ICSR1_FFLUSH | UD_ICSR1_CLRDT;
usb_write(val, S3C_UDC_IN_CSR1_REG, 1);
usb_write(0, S3C_UDC_IN_CSR2_REG, 1); // output mode
val = (1<<4)|(1<<7); //UD_OCSR1_FFLUSH | UD_OCSR1_CLRDT;
usb_write(val, S3C_UDC_OUT_CSR1_REG, 1);
val = (1<<5); //UD_OCSR2_DMAIEN;
usb_write(val, S3C_UDC_OUT_CSR2_REG, 1);
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 3);
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 2);
val = EP_FIFO_SIZE>>3;
usb_write(val, S3C_UDC_MAXP_REG, 1);
//val = (1<<0)|(1<<1)|(1<<2); //UD_INTE_EP0 | UD_INTE_EP2 | UD_INTE_EP1;
val = (1<<0)|(1<<1)|(1<<2)|(1<<3); //UD_INTE_EP0 | UD_INTE_EP2 | UD_INTE_EP1;
usb_write(val, S3C_UDC_EP_INT_EN_REG, 0);
usb_write(val & ~(1<<0), S3C_UDC_EP_INT_REG, 0); //clear
val = (1<<0)|(1<<2); //UD_USBINTE_RESET | UD_USBINTE_SUSPND;
usb_write(val, S3C_UDC_USB_INT_EN_REG, 0);
usb_write(val, S3C_UDC_USB_INT_REG, 0); //clear
}
/*
* elfin usb client interrupt handler.
*/
static irqreturn_t s3c_udc_irq(int irq, void *_dev, struct pt_regs *r)
{
struct s3c_udc *dev = _dev;
spin_lock(&dev->lock);
u32 intr_out, intr_in;
u32 intr_int, val;
intr_out = intr_in = usb_read(S3C_UDC_EP_INT_REG, 0);
intr_int = usb_read(S3C_UDC_USB_INT_REG, 0);
/* We have only 3 usable eps now -jassi */
intr_in &= (S3C_UDC_INT_EP3 | S3C_UDC_INT_EP2 | S3C_UDC_INT_EP0);
intr_out &= S3C_UDC_INT_EP1;
if (!intr_out && !intr_in && !intr_int){
spin_unlock(&dev->lock);
return IRQ_HANDLED;
}
DEBUG("%s (on state %s)\n", __FUNCTION__,
state_names[dev->ep0state]);
DEBUG("intr_out = %x\n", intr_out);
DEBUG("intr_in = %x\n", intr_in);
DEBUG("intr_int = %x\n", intr_int);
if (intr_in) {
if (intr_in & S3C_UDC_INT_EP0){
//printk("EP0 ");
usb_write(S3C_UDC_INT_EP0, S3C_UDC_EP_INT_REG, 0);
s3c_handle_ep0(dev);
}else if (intr_in & S3C_UDC_INT_EP2){
//printk("EP2 ");
usb_write(S3C_UDC_INT_EP2, S3C_UDC_EP_INT_REG, 2);
s3c_in_epn(dev, 2); // hard coded !!! -jassi
}else{
//printk("EP3 ");
usb_write(S3C_UDC_INT_EP3, S3C_UDC_EP_INT_REG, 3);
s3c_in_epn(dev, 3); // hard coded !!! -jassi
}
}
if (intr_out) {
//printk("EP1 ");
usb_write(S3C_UDC_INT_EP1, S3C_UDC_EP_INT_REG, 1);
s3c_out_epn(dev, 1); // hard coded !!! -jassi
}
if (intr_int) {
if (intr_int & S3C_UDC_USBINT_RESET) {
reconfig_usbd();
dev->gadget.speed = USB_SPEED_FULL;
dev->ep0state = WAIT_FOR_SETUP;
usb_write(S3C_UDC_USBINT_RESET, S3C_UDC_USB_INT_REG, 0);
DEBUG_SETUP("RESET");
}
usb_write(intr_int, S3C_UDC_USB_INT_REG, 0);
if (intr_int & S3C_UDC_USBINT_RESUME) {
DEBUG_SETUP("USB resume\n");
if (dev->gadget.speed != USB_SPEED_UNKNOWN
&& dev->driver
&& dev->driver->resume) {
dev->driver->resume(&dev->gadget);
}
}
if (intr_int & S3C_UDC_USBINT_SUSPEND) {
if (dev->gadget.speed !=
USB_SPEED_UNKNOWN && dev->driver
&& dev->driver->suspend) {
dev->driver->suspend(&dev->gadget);
}
}
}
__raw_writel(IRQ_USBD, S3C_INTPND);
__raw_writel(IRQ_USBD, S3C_SRCPND);
spin_unlock(&dev->lock);
return IRQ_HANDLED;
}
static int s3c_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct s3c_ep *ep;
struct s3c_udc *dev;
unsigned long flags;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || !desc || ep->desc || _ep->name == ep0name
|| desc->bDescriptorType != USB_DT_ENDPOINT
|| ep->bEndpointAddress != desc->bEndpointAddress
|| ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
DEBUG("%s, bad ep or descriptor\n", __FUNCTION__);
return -EINVAL;
}
/* xfer types must match, except that interrupt ~= bulk */
if (ep->bmAttributes != desc->bmAttributes
&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
return -EINVAL;
}
/* hardware _could_ do smaller, but driver doesn't */
if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
&& le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
|| !desc->wMaxPacketSize) {
DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
return -ERANGE;
}
dev = ep->dev;
if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
DEBUG("%s, bogus device state\n", __FUNCTION__);
return -ESHUTDOWN;
}
spin_lock_irqsave(&ep->dev->lock, flags);
ep->stopped = 0;
ep->desc = desc;
ep->pio_irqs = 0;
ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
/* Reset halt state */
s3c_set_halt(_ep, 0);
spin_unlock_irqrestore(&ep->dev->lock, flags);
DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name);
return 0;
}
/** Disable EP
*/
static int s3c_ep_disable(struct usb_ep *_ep)
{
struct s3c_ep *ep;
unsigned long flags;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || !ep->desc) {
DEBUG("%s, %s not enabled\n", __FUNCTION__,
_ep ? ep->ep.name : NULL);
return -EINVAL;
}
spin_lock_irqsave(&ep->dev->lock, flags);
/* Nuke all pending requests */
nuke(ep, -ESHUTDOWN);
ep->desc = 0;
ep->stopped = 1;
spin_unlock_irqrestore(&ep->dev->lock, flags);
DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
return 0;
}
static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
int gfp_flags)
{
struct s3c_request *req;
DEBUG("%s, %p\n", __FUNCTION__, ep);
req = kmalloc(sizeof *req, gfp_flags);
if (!req)
return 0;
memset(req, 0, sizeof *req);
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
{
struct s3c_request *req;
DEBUG("%s, %p\n", __FUNCTION__, ep);
req = container_of(_req, struct s3c_request, req);
WARN_ON(!list_empty(&req->queue));
kfree(req);
}
static void *s3c_alloc_buffer(struct usb_ep *ep, unsigned bytes,
dma_addr_t * dma, int gfp_flags)
{
char *retval;
DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags);
retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM));
if (retval)
*dma = virt_to_bus(retval);
return retval;
}
static void s3c_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma,
unsigned bytes)
{
DEBUG("%s, %p\n", __FUNCTION__, ep);
kfree(buf);
}
/** Queue one request
* Kickstart transfer if needed
*/
static int s3c_queue(struct usb_ep *_ep, struct usb_request *_req,
int gfp_flags)
{
struct s3c_request *req;
struct s3c_ep *ep;
struct s3c_udc *dev;
unsigned long flags;
DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep);
req = container_of(_req, struct s3c_request, req);
if (unlikely
(!_req || !_req->complete || !_req->buf
|| !list_empty(&req->queue))) {
DEBUG("%s, bad params\n", __FUNCTION__);
return -EINVAL;
}
ep = container_of(_ep, struct s3c_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return -EINVAL;
}
dev = ep->dev;
if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
return -ESHUTDOWN;
}
DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
_req->buf);
spin_lock_irqsave(&dev->lock, flags);
_req->status = -EINPROGRESS;
_req->actual = 0;
/* kickstart this i/o queue? */
DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
ep->stopped);
if (list_empty(&ep->queue) && likely(!ep->stopped)) {
u32 csr;
if (unlikely(ep_index(ep) == 0)) {
/* EP0 */
list_add_tail(&req->queue, &ep->queue);
s3c_ep0_kick(dev, ep);
req = 0;
} else if (ep_is_in(ep)) {
csr = usb_read(ep->csr1, ep_index(ep));
if(!(csr & S3C_UDC_ICSR1_PKTRDY)&&(write_fifo(ep, req) == 1))
req = 0;
} else {
csr = usb_read(ep->csr1, ep_index(ep));
if (read_fifo(ep, req) == 1)
req = 0;
}
}
/* pio or dma irq handler advances the queue. */
if (likely(req != 0))
list_add_tail(&req->queue, &ep->queue);
spin_unlock_irqrestore(&dev->lock, flags);
return 0;
}
/* dequeue JUST ONE request */
static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct s3c_ep *ep;
struct s3c_request *req;
unsigned long flags;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || ep->ep.name == ep0name)
return -EINVAL;
spin_lock_irqsave(&ep->dev->lock, flags);
/* make sure it's actually queued on this endpoint */
list_for_each_entry(req, &ep->queue, queue) {
if (&req->req == _req)
break;
}
if (&req->req != _req) {
spin_unlock_irqrestore(&ep->dev->lock, flags);
return -EINVAL;
}
done(ep, req, -ECONNRESET);
spin_unlock_irqrestore(&ep->dev->lock, flags);
return 0;
}
/** Halt specific EP
* Return 0 if success
*/
static int s3c_set_halt(struct usb_ep *_ep, int value)
{
return 0;
}
/** Return bytes in EP FIFO
*/
static int s3c_fifo_status(struct usb_ep *_ep)
{
u32 csr;
int count = 0;
struct s3c_ep *ep;
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return -ENODEV;
}
DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
/* LPD can't report unclaimed bytes from IN fifos */
if (ep_is_in(ep))
return -EOPNOTSUPP;
csr = usb_read(ep->csr1, ep_index(ep));
if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
csr & S3C_UDC_OCSR1_PKTRDY) {
count = ( ((usb_read(S3C_UDC_OUT_FIFO_CNT2_REG, ep_index(ep)) & 0xff) << 8)
| (usb_read(S3C_UDC_OUT_FIFO_CNT1_REG, ep_index(ep)) & 0xff));
}
return count;
}
/** Flush EP FIFO
*/
static void s3c_fifo_flush(struct usb_ep *_ep)
{
struct s3c_ep *ep;
ep = container_of(_ep, struct s3c_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return;
}
}
/****************************************************************/
/* End Point 0 related functions */
/****************************************************************/
/* return: 0 = still running, 1 = completed, negative = errno */
static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req)
{
u32 max;
unsigned count;
int is_last;
max = ep_maxpacket(ep);
DEBUG_EP0("%s\n", __FUNCTION__);
count = write_packet(ep, req, max);
/* last packet is usually short (or a zlp) */
if (unlikely(count != max))
is_last = 1;
else {
if (likely(req->req.length != req->req.actual) || req->req.zero)
is_last = 0;
else
is_last = 1;
}
DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
ep->ep.name, count,
is_last ? "/L" : "", req->req.length - req->req.actual, req);
/* requests complete when all IN data is in the FIFO */
if (is_last) {
return 1;
}
return 0;
}
static __inline__ int s3c_fifo_read(struct s3c_ep *ep,
unsigned char *cp, int max)
{
int bytes;
int count;
u32 fifo = ep->fifo;
count = ( ((usb_read(S3C_UDC_OUT_FIFO_CNT2_REG, ep_index(ep)) & 0xff ) << 8)
| (usb_read(S3C_UDC_OUT_FIFO_CNT1_REG, ep_index(ep)) & 0xff) );
if (count != max){
printk("count=%d max=%d\n", count, max);
count = max;
}
bytes = count;
while (count--)
*cp++ = (u8) __raw_readl(fifo);
return bytes;
}
static __inline__ void s3c_fifo_write(struct s3c_ep *ep,
unsigned char *cp, int count)
{
u32 fifo = ep->fifo;
DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
while (count--)
__raw_writel(*cp++, fifo);
}
static int read_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req)
{
u32 csr;
u8 *buf;
unsigned bufferspace, count, is_short;
u32 fifo = ep->fifo;
DEBUG_EP0("%s\n", __FUNCTION__);
csr = usb_read(S3C_UDC_EP0_CSR_REG, ep_index(ep));
if (!(csr & S3C_UDC_OCSR1_PKTRDY))
return 0;
buf = req->req.buf + req->req.actual;
prefetchw(buf);
bufferspace = req->req.length - req->req.actual;
/* read all bytes from this packet */
if (likely(csr & S3C_UDC_EP0_CSR_OPKRDY)) {
count = 8; // I do !!!
req->req.actual += min(count, bufferspace);
} else { // zlp
count = 0;
}
is_short = (count < ep->ep.maxpacket);
DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
ep->ep.name, csr, count,
is_short ? "/S" : "", req, req->req.actual, req->req.length);
while (likely(count-- != 0)) {
u8 byte = (u8) __raw_readl(fifo);
if (unlikely(bufferspace == 0)) {
/* this happens when the driver's buffer
* is smaller than what the host sent.
* discard the extra data.
*/
if (req->req.status != -EOVERFLOW)
DEBUG_EP0("%s overflow %d\n", ep->ep.name,
count);
req->req.status = -EOVERFLOW;
} else {
*buf++ = byte;
bufferspace--;
}
}
/* completion */
if (is_short || req->req.actual == req->req.length) {
return 1;
}
return 0;
}
/**
* udc_set_address - set the USB address for this device
* @address:
*
* Called from control endpoint function after it decodes a set address setup packet.
*/
static void udc_set_address(struct s3c_udc *dev, unsigned char address)
{
DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
dev->usb_address = address;
usb_set((1<<7) | (address & 0x7f), S3C_UDC_FUNC_ADDR_REG, 0);
}
/*
* DATA_STATE_RECV (OUT_PKT_RDY)
* - if error
* set S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE | S3C_UDC_EP0_CSR_SENDSTL bits
* - else
* set S3C_UDC_EP0_CSR_SOPKTRDY bit
if last set S3C_UDC_EP0_CSR_DE bit
*/
static int first_time = 1;
static void s3c_ep0_read(struct s3c_udc *dev)
{
struct s3c_request *req;
struct s3c_ep *ep = &dev->ep[0];
int ret;
if (!list_empty(&ep->queue))
req = list_entry(ep->queue.next, struct s3c_request, queue);
else
BUG(); //logic ensures -jassi
if(req->req.length == 0) {
usb_set((S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
dev->ep0state = WAIT_FOR_SETUP;
first_time = 1;
done(ep, req, 0);
return;
}
if(!req->req.actual && first_time){ //for SetUp packet
usb_set(S3C_UDC_EP0_CSR_SOPKTRDY, S3C_UDC_EP0_CSR_REG, 0);
first_time = 0;
return;
}
ret = read_fifo_ep0(ep, req);
if (ret) {
usb_set((S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
dev->ep0state = WAIT_FOR_SETUP;
first_time = 1;
done(ep, req, 0);
return;
}
usb_set(S3C_UDC_EP0_CSR_SOPKTRDY, S3C_UDC_EP0_CSR_REG, 0);
}
/*
* DATA_STATE_XMIT
*/
static int s3c_ep0_write(struct s3c_udc *dev)
{
struct s3c_request *req;
struct s3c_ep *ep = &dev->ep[0];
int ret, need_zlp = 0;
DEBUG_EP0("%s: %x\n", __FUNCTION__);
if (list_empty(&ep->queue))
req = 0;
else
req = list_entry(ep->queue.next, struct s3c_request, queue);
if (!req) {
DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
return 0;
}
if (req->req.length == 0) {
usb_set((S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
dev->ep0state = WAIT_FOR_SETUP;
done(ep, req, 0);
return 1;
}
if (req->req.length - req->req.actual == EP0_FIFO_SIZE) {
/* Next write will end with the packet size, */
/* so we need Zero-length-packet */
need_zlp = 1;
}
ret = write_fifo_ep0(ep, req);
if ((ret == 1) && !need_zlp) {
/* Last packet */
DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
usb_set((S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
dev->ep0state = WAIT_FOR_SETUP;
} else {
DEBUG_EP0("%s: not finished\n", __FUNCTION__);
usb_set(S3C_UDC_EP0_CSR_IPKRDY, S3C_UDC_EP0_CSR_REG, 0);
}
if (need_zlp) {
DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
dev->ep0state = DATA_STATE_NEED_ZLP;
}
if(ret)
done(ep, req, 0);
return 1;
}
#if 0
static int s3c_handle_get_status(struct s3c_udc *dev,
struct usb_ctrlrequest *ctrl)
{
struct s3c_ep *ep0 = &dev->ep[0];
struct s3c_ep *qep;
int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
u16 val = 0;
if (reqtype == USB_RECIP_INTERFACE) {
/* This is not supported.
* And according to the USB spec, this one does nothing..
* Just return 0
*/
DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
} else if (reqtype == USB_RECIP_DEVICE) {
DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
val |= (1 << 0); /* Self powered */
/*val |= (1<<1); *//* Remote wakeup */
} else if (reqtype == USB_RECIP_ENDPOINT) {
int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
DEBUG_SETUP
("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
ep_num, ctrl->wLength);
if (ctrl->wLength > 2 || ep_num > 3)
return -EOPNOTSUPP;
qep = &dev->ep[ep_num];
if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
&& ep_index(qep) != 0) {
return -EOPNOTSUPP;
}
/* Return status on next IN token */
switch (qep->ep_type) {
case ep_control:
val =
(usb_read(qep->csr1, ep_index(qep)) & S3C_UDC_EP0_CSR_SENDSTL) ==
S3C_UDC_EP0_CSR_SENDSTL;
break;
case ep_bulk_in:
case ep_interrupt:
val = (usb_read(qep->csr1, ep_index(qep))
& S3C_UDC_ICSR1_SENDSTL) == S3C_UDC_ICSR1_SENDSTL;
break;
case ep_bulk_out:
val = (usb_read(qep->csr1, ep_index(qep))
& S3C_UDC_OCSR1_SENDSTL) == S3C_UDC_OCSR1_SENDSTL;
break;
}
/* Back to EP0 index */
DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
ctrl->wIndex, val);
} else {
DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
return -EOPNOTSUPP;
}
/* Clear "out packet ready" */
usb_set((S3C_UDC_EP0_CSR_SOPKTRDY), S3C_UDC_EP0_CSR_REG, 0);
/* Put status to FIFO */
s3c_fifo_write(ep0, (u8 *) & val, sizeof(val));
/* Issue "In packet ready" */
usb_set((S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
return 0;
}
#endif
/*
* WAIT_FOR_SETUP (OUT_PKT_RDY)
* - read data packet from EP0 FIFO
* - decode command
* - if error
* set S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE | S3C_UDC_EP0_CSR_SENDSTL bits
* - else
* set S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE bits
*/
static void s3c_ep0_setup(struct s3c_udc *dev, u32 csr)
{
struct s3c_ep *ep = &dev->ep[0];
struct usb_ctrlrequest ctrl;
int i, bytes, is_in;
DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
/* Nuke all previous transfers */
nuke(ep, -EPROTO);
/* read control req from fifo (8 bytes) */
bytes = s3c_fifo_read(ep, (unsigned char *)&ctrl, 8);
DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
DEBUG_SETUP("CTRL.bRequestType = 0x%x (is_in %d)\n", ctrl.bRequestType,
ctrl.bRequestType & USB_DIR_IN);
DEBUG_SETUP("CTRL.bRequest = 0x%x\n", ctrl.bRequest);
DEBUG_SETUP("CTRL.wLength = 0x%x\n", ctrl.wLength);
DEBUG_SETUP("CTRL.wValue = 0x%x (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
DEBUG_SETUP("CTRL.wIndex = 0x%x\n", ctrl.wIndex);
/* Set direction of EP0 */
if (likely(ctrl.bRequestType & USB_DIR_IN)) {
ep->bEndpointAddress |= USB_DIR_IN;
is_in = 1;
} else {
ep->bEndpointAddress &= ~USB_DIR_IN;
is_in = 0;
}
dev->req_pending = 1;
/* Handle some SETUP packets ourselves */
switch (ctrl.bRequest) {
case USB_REQ_SET_ADDRESS:
if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
break;
DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
udc_set_address(dev, ctrl.wValue);
usb_set((S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE), S3C_UDC_EP0_CSR_REG, 0);
return;
#if 0
case USB_REQ_GET_STATUS:
DEBUG_SETUP("USB_REQ_GET_STATUS \n");
if (s3c_handle_get_status(dev, &ctrl) == 0)
return;
#endif
default:
DEBUG_SETUP(" DFAULT\n");
break;
}
if (likely(dev->driver)) {
/* device-2-host (IN) or no data setup command, process immediately */
spin_unlock(&dev->lock);
i = dev->driver->setup(&dev->gadget, &ctrl);
spin_lock(&dev->lock);
if (i < 0) {
/* setup processing failed, force stall */
printk(" --> ERROR: gadget setup FAILED (stalling), \
setup returned %d\n", i);
usb_set((S3C_UDC_EP0_CSR_SOPKTRDY | S3C_UDC_EP0_CSR_DE
|S3C_UDC_EP0_CSR_SENDSTL), S3C_UDC_EP0_CSR_REG, 0);
/* ep->stopped = 1; */
dev->ep0state = WAIT_FOR_SETUP;
}
}
}
/*
* DATA_STATE_NEED_ZLP
*/
static void s3c_ep0_in_zlp(struct s3c_udc *dev, u32 csr)
{
DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
usb_set((S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_DE),
S3C_UDC_EP0_CSR_REG, 0);
dev->ep0state = WAIT_FOR_SETUP;
}
/*
* handle ep0 interrupt
*/
static void s3c_handle_ep0(struct s3c_udc *dev)
{
struct s3c_ep *ep = &dev->ep[0];
u32 csr;
csr = usb_read(S3C_UDC_EP0_CSR_REG, ep_index(ep));
DEBUG_EP0("%s: csr = %x\n", __FUNCTION__, csr);
/*
* if SENT_STALL is set
* - clear the SENT_STALL bit
*/
if (csr & S3C_UDC_EP0_CSR_SENTSTL) {
printk("%s: S3C_UDC_EP0_CSR_SENTSTL is set: %x\n", __FUNCTION__, csr);
usb_write(0, S3C_UDC_EP0_CSR_REG, 0);
nuke(ep, -ECONNABORTED);
dev->ep0state = WAIT_FOR_SETUP;
return;
}
/*
* if SETUP_END is set
* - abort the last transfer
* - set SERVICED_SETUP_END_BIT
*/
if (csr & S3C_UDC_EP0_CSR_SE) {
DEBUG_EP0("%s: S3C_UDC_EP0_CSR_SE is set: %x\n", __FUNCTION__, csr);
usb_clear(0xc0, S3C_UDC_EP0_CSR_REG, 0);
usb_set(S3C_UDC_EP0_CSR_SSE, S3C_UDC_EP0_CSR_REG, 0);
nuke(ep, 0);
dev->ep0state = WAIT_FOR_SETUP;
}
/*
* if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
* - fill EP0 FIFO
* - if last packet
* - set IN_PKT_RDY | DATA_END
* - else
* set IN_PKT_RDY
*/
if (!(csr & (S3C_UDC_EP0_CSR_IPKRDY | S3C_UDC_EP0_CSR_OPKRDY))) {
switch (dev->ep0state) {
case DATA_STATE_XMIT:
DEBUG_EP0("continue with DATA_STATE_XMIT\n");
s3c_ep0_write(dev);
return;
case DATA_STATE_NEED_ZLP:
DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
s3c_ep0_in_zlp(dev, csr);
return;
default:
/* Stall? */
DEBUG_EP0("Odd state!! state = %s\n",
state_names[dev->ep0state]);
dev->ep0state = WAIT_FOR_SETUP;
/* nuke(ep, 0); */
/* usb_set(S3C_UDC_EP0_CSR_SENDSTL, ep->csr1, ep_index(ep)); */
break;
}
}
/*
* if S3C_UDC_EP0_CSR_OPKRDY is set
* - read data packet from EP0 FIFO
* - decode command
* - if error
* set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
* - else
* set SERVICED_OUT_PKT_RDY | DATA_END bits
*/
if (csr & S3C_UDC_EP0_CSR_OPKRDY) {
switch (dev->ep0state) {
case WAIT_FOR_SETUP:
DEBUG_EP0("WAIT_FOR_SETUP\n");
s3c_ep0_setup(dev, csr);
break;
case DATA_STATE_RECV:
DEBUG_EP0("DATA_STATE_RECV\n");
s3c_ep0_read(dev);
break;
default:
/* send stall? */
DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
dev->ep0state);
break;
}
}
}
static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep)
{
if (ep_is_in(ep)) {
/* Clear "out packet ready" */
usb_set(S3C_UDC_EP0_CSR_SOPKTRDY, S3C_UDC_EP0_CSR_REG, 0);
udelay(5); // time to settle things down
dev->ep0state = DATA_STATE_XMIT;
s3c_ep0_write(dev);
} else {
dev->ep0state = DATA_STATE_RECV;
s3c_ep0_read(dev);
}
}
/* ---------------------------------------------------------------------------
* device-scoped parts of the api to the usb controller hardware
* ---------------------------------------------------------------------------
*/
static int s3c_udc_get_frame(struct usb_gadget *_gadget)
{
u32 frame1 = usb_read(S3C_UDC_FRAME_NUM1_REG, 0);/* Least significant 8 bits */
u32 frame2 = usb_read(S3C_UDC_FRAME_NUM1_REG, 0);/* Most significant 3 bits */
DEBUG("%s, %p\n", __FUNCTION__, _gadget);
return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
}
static int s3c_udc_wakeup(struct usb_gadget *_gadget)
{
return -ENOTSUPP;
}
static const struct usb_gadget_ops s3c_udc_ops = {
.get_frame = s3c_udc_get_frame,
.wakeup = s3c_udc_wakeup,
/* current versions must always be self-powered */
};
static void nop_release(struct device *dev)
{
DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
}
static struct s3c_udc memory = {
.usb_address = 0,
.gadget = {
.ops = &s3c_udc_ops,
.ep0 = &memory.ep[0].ep,
.name = driver_name,
.dev = {
.bus_id = "gadget",
.release = nop_release,
},
},
/* control endpoint */
.ep[0] = {
.ep = {
.name = ep0name,
.ops = &s3c_ep_ops,
.maxpacket = EP0_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = 0,
.bmAttributes = 0,
.ep_type = ep_control,
.fifo = S3C_UDC_EP0_FIFO_REG,
.csr1 = S3C_UDC_EP0_CSR_REG,
.csr2 = S3C_UDC_EP0_CSR_REG,
},
/* first group of endpoints */
.ep[1] = {
.ep = {
.name = "ep1-bulk",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = 1,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.ep_type = ep_bulk_out,
.fifo = S3C_UDC_EP1_FIFO_REG,
.csr1 = S3C_UDC_OUT_CSR1_REG,
.csr2 = S3C_UDC_OUT_CSR2_REG,
},
.ep[2] = {
.ep = {
.name = "ep2-bulk",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_IN | 2,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.ep_type = ep_bulk_in,
.fifo = S3C_UDC_EP2_FIFO_REG,
.csr1 = S3C_UDC_IN_CSR1_REG,
.csr2 = S3C_UDC_IN_CSR2_REG,
},
.ep[3] = { // Though NOT USED XXX
.ep = {
.name = "ep3-int",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_IN | 3,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.ep_type = ep_interrupt,
.fifo = S3C_UDC_EP3_FIFO_REG,
.csr1 = S3C_UDC_IN_CSR1_REG,
.csr2 = S3C_UDC_IN_CSR2_REG,
},
.ep[4] = { // Though NOT USED XXX
.ep = {
.name = "ep4-int",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_IN | 4,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.ep_type = ep_interrupt,
.fifo = S3C_UDC_EP4_FIFO_REG,
.csr1 = S3C_UDC_IN_CSR1_REG,
.csr2 = S3C_UDC_IN_CSR2_REG,
},
};
/*
* probe - binds to the platform device
*/
static int s3c_udc_probe(struct platform_device *pdev)
{
struct s3c_udc *dev = &memory;
int retval;
DEBUG("%s: %p\n", __FUNCTION__, pdev);
GPIO_INIT;
spin_lock_init(&dev->lock);
dev->dev = &pdev;
device_initialize(&dev->gadget.dev);
dev->gadget.dev.parent = &pdev->dev;
//dev->gadget.is_dualspeed = 1; // Hack only
dev->gadget.is_otg = 0;
dev->gadget.is_a_peripheral = 0;
dev->gadget.b_hnp_enable = 0;
dev->gadget.a_hnp_support = 0;
dev->gadget.a_alt_hnp_support = 0;
the_controller = dev;
platform_set_drvdata(pdev, dev);
udc_reinit(dev);
local_irq_disable();
/* irq setup after old hardware state is cleaned up */
retval =
request_irq(IRQ_USBD, s3c_udc_irq, SA_INTERRUPT, driver_name,
dev);
if (retval != 0) {
DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
IRQ_USBD, retval);
return -EBUSY;
}
disable_irq(IRQ_USBD);
udc_enable(dev);
reconfig_usbd();
local_irq_enable();
create_proc_files();
return retval;
}
static int s3c_udc_remove(struct platform_device *pdev)
{
struct s3c_udc *dev = platform_get_drvdata(pdev);
DEBUG("%s: %p\n", __FUNCTION__, pdev);
udc_disable(dev);
remove_proc_files();
usb_gadget_unregister_driver(dev->driver);
free_irq(IRQ_USBD, dev);
platform_set_drvdata(pdev, 0);
the_controller = 0;
return 0;
}
/*-------------------------------------------------------------------------*/
static struct platform_driver s3c_udc_driver = {
.probe = s3c_udc_probe,
.remove = s3c_udc_remove,
.driver = {
.owner = THIS_MODULE,
.name = "s3c-udc",
},
};
static int __init s3c_udc_init(void)
{
int ret;
ret = platform_driver_register(&s3c_udc_driver);
if(!ret)
printk("Loaded %s version %s\n", driver_name, DRIVER_VERSION);
return ret;
}
static void __exit s3c_udc_exit(void)
{
platform_driver_unregister(&s3c_udc_driver);
printk("Unloaded %s version %s\n", driver_name, DRIVER_VERSION);
}
module_init(s3c_udc_init);
module_exit(s3c_udc_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Samsung");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink