*
*
* The driver brings the USB functions of the MDC800 to Linux.
- * To use the Camera you must support the USB Protocoll of the camera
+ * To use the Camera you must support the USB Protocol of the camera
* to the Kernel Node.
* The Driver uses a misc device Node. Create it with :
* mknod /dev/mustek c 180 32
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
-#include <linux/smp_lock.h>
#include <linux/wait.h>
+#include <linux/mutex.h>
#include <linux/usb.h>
#include <linux/fs.h>
int out_count; // Bytes in the buffer
int open; // Camera device open ?
- struct semaphore io_lock; // IO -lock
+ struct mutex io_lock; // IO -lock
char in [8]; // Command Input Buffer
int in_count;
/*
* USB IRQ Handler for InputLine
*/
-static void mdc800_usb_irq (struct urb *urb, struct pt_regs *res)
+static void mdc800_usb_irq (struct urb *urb)
{
int data_received=0, wake_up;
unsigned char* b=urb->transfer_buffer;
/*
* The write_urb callback function
*/
-static void mdc800_usb_write_notify (struct urb *urb, struct pt_regs *res)
+static void mdc800_usb_write_notify (struct urb *urb)
{
struct mdc800_data* mdc800=urb->context;
/*
* The download_urb callback function
*/
-static void mdc800_usb_download_notify (struct urb *urb, struct pt_regs *res)
+static void mdc800_usb_download_notify (struct urb *urb)
{
struct mdc800_data* mdc800=urb->context;
***************************************************************************/
static struct usb_driver mdc800_usb_driver;
-static struct file_operations mdc800_device_ops;
+static const struct file_operations mdc800_device_ops;
static struct usb_class_driver mdc800_class = {
- .name = "usb/mdc800%d",
+ .name = "mdc800%d",
.fops = &mdc800_device_ops,
- .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
.minor_base = MDC800_DEVICE_MINOR_BASE,
};
info ("Found Mustek MDC800 on USB.");
- down (&mdc800->io_lock);
+ mutex_lock(&mdc800->io_lock);
retval = usb_register_dev(intf, &mdc800_class);
if (retval) {
mdc800->state=READY;
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
usb_set_intfdata(intf, mdc800);
return 0;
usb_deregister_dev(intf, &mdc800_class);
+ /* must be under lock to make sure no URB
+ is submitted after usb_kill_urb() */
+ mutex_lock(&mdc800->io_lock);
mdc800->state=NOT_CONNECTED;
usb_kill_urb(mdc800->irq_urb);
usb_kill_urb(mdc800->write_urb);
usb_kill_urb(mdc800->download_urb);
+ mutex_unlock(&mdc800->io_lock);
mdc800->dev = NULL;
usb_set_intfdata(intf, NULL);
int retval=0;
int errn=0;
- down (&mdc800->io_lock);
+ mutex_lock(&mdc800->io_lock);
if (mdc800->state == NOT_CONNECTED)
{
dbg ("Mustek MDC800 device opened.");
error_out:
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return errn;
}
int retval=0;
dbg ("Mustek MDC800 device closed.");
- down (&mdc800->io_lock);
+ mutex_lock(&mdc800->io_lock);
if (mdc800->open && (mdc800->state != NOT_CONNECTED))
{
usb_kill_urb(mdc800->irq_urb);
retval=-EIO;
}
- up(&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return retval;
}
size_t left=len, sts=len; /* single transfer size */
char __user *ptr = buf;
- down (&mdc800->io_lock);
+ mutex_lock(&mdc800->io_lock);
if (mdc800->state == NOT_CONNECTED)
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (mdc800->state == WORKING)
{
warn ("Illegal State \"working\" reached during read ?!");
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (!mdc800->open)
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
{
if (signal_pending (current))
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EINTR;
}
if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL))
{
err ("Can't submit download urb (status=%i)",mdc800->download_urb->status);
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return len-left;
}
wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
if (mdc800->download_urb->status != 0)
{
err ("request download-bytes fails (status=%i)",mdc800->download_urb->status);
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return len-left;
}
}
else
{
/* No more bytes -> that's an error*/
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
}
/* Copy Bytes */
if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
sts)) {
- up(&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EFAULT;
}
ptr+=sts;
}
}
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return len-left;
}
{
size_t i=0;
- down (&mdc800->io_lock);
+ mutex_lock(&mdc800->io_lock);
if (mdc800->state != READY)
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (!mdc800->open )
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
unsigned char c;
if (signal_pending (current))
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EINTR;
}
if(get_user(c, buf+i))
{
- up(&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EFAULT;
}
}
else
{
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
{
err ("Camera didn't get ready.\n");
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL))
{
err ("submitting write urb fails (status=%i)", mdc800->write_urb->status);
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000);
if (mdc800->state == WORKING)
{
usb_kill_urb(mdc800->write_urb);
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
{
err ("call 0x07 before 0x05,0x3e");
mdc800->state=READY;
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
mdc800->pic_len=-1;
if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
{
err ("requesting answer from irq fails");
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
{
err ("Command Timeout.");
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return -EIO;
}
}
}
i++;
}
- up (&mdc800->io_lock);
+ mutex_unlock(&mdc800->io_lock);
return i;
}
****************************************************************************/
/* File Operations of this drivers */
-static struct file_operations mdc800_device_ops =
+static const struct file_operations mdc800_device_ops =
{
.owner = THIS_MODULE,
.read = mdc800_device_read,
*/
static struct usb_driver mdc800_usb_driver =
{
- .owner = THIS_MODULE,
.name = "mdc800",
.probe = mdc800_usb_probe,
.disconnect = mdc800_usb_disconnect,
Init and Cleanup this driver (Main Functions)
*************************************************************************/
-#define try(A) if (!(A)) goto cleanup_on_fail;
-
static int __init usb_mdc800_init (void)
{
int retval = -ENODEV;
/* Allocate Memory */
- try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL));
+ mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
+ if (!mdc800)
+ goto cleanup_on_fail;
- memset(mdc800, 0, sizeof(struct mdc800_data));
mdc800->dev = NULL;
- mdc800->open=0;
mdc800->state=NOT_CONNECTED;
- init_MUTEX (&mdc800->io_lock);
+ mutex_init (&mdc800->io_lock);
init_waitqueue_head (&mdc800->irq_wait);
init_waitqueue_head (&mdc800->write_wait);
mdc800->downloaded = 0;
mdc800->written = 0;
- try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL));
- try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL));
- try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL));
+ mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
+ if (!mdc800->irq_urb_buffer)
+ goto cleanup_on_fail;
+ mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
+ if (!mdc800->write_urb_buffer)
+ goto cleanup_on_fail;
+ mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
+ if (!mdc800->download_urb_buffer)
+ goto cleanup_on_fail;
- try (mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL));
- try (mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL));
- try (mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL));
+ mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
+ if (!mdc800->irq_urb)
+ goto cleanup_on_fail;
+ mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
+ if (!mdc800->download_urb)
+ goto cleanup_on_fail;
+ mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
+ if (!mdc800->write_urb)
+ goto cleanup_on_fail;
/* Register the driver */
retval = usb_register(&mdc800_usb_driver);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff