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alistair23-linux/drivers/usb/image/mdc800.c
Greg Kroah-Hartman 6748fa8f11 USB: image: Remove redundant license text 
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:55:38 +01:00

1078 lines
24 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
*/
/*
* USB-Kernel Driver for the Mustek MDC800 Digital Camera
* (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de>
*
*
* The driver brings the USB functions of the MDC800 to Linux.
* 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
*
* The driver supports only one camera.
*
* Fix: mdc800 used sleep_on and slept with io_lock held.
* Converted sleep_on to waitqueues with schedule_timeout and made io_lock
* a semaphore from a spinlock.
* by Oliver Neukum <oliver@neukum.name>
* (02/12/2001)
*
* Identify version on module load.
* (08/04/2001) gb
*
* version 0.7.5
* Fixed potential SMP races with Spinlocks.
* Thanks to Oliver Neukum <oliver@neukum.name> who
* noticed the race conditions.
* (30/10/2000)
*
* Fixed: Setting urb->dev before submitting urb.
* by Greg KH <greg@kroah.com>
* (13/10/2000)
*
* version 0.7.3
* bugfix : The mdc800->state field gets set to READY after the
* the disconnect function sets it to NOT_CONNECTED. This makes the
* driver running like the camera is connected and causes some
* hang ups.
*
* version 0.7.1
* MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload
* problems when compiled as Module.
* (04/04/2000)
*
* The mdc800 driver gets assigned the USB Minor 32-47. The Registration
* was updated to use these values.
* (26/03/2000)
*
* The Init und Exit Module Function are updated.
* (01/03/2000)
*
* version 0.7.0
* Rewrite of the driver : The driver now uses URB's. The old stuff
* has been removed.
*
* version 0.6.0
* Rewrite of this driver: The Emulation of the rs232 protocoll
* has been removed from the driver. A special executeCommand function
* for this driver is included to gphoto.
* The driver supports two kind of communication to bulk endpoints.
* Either with the dev->bus->ops->bulk... or with callback function.
* (09/11/1999)
*
* version 0.5.0:
* first Version that gets a version number. Most of the needed
* functions work.
* (20/10/1999)
*/
#include <linux/sched/signal.h>
#include <linux/signal.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/usb.h>
#include <linux/fs.h>
/*
* Version Information
*/
#define DRIVER_VERSION "v0.7.5 (30/10/2000)"
#define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>"
#define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera"
/* Vendor and Product Information */
#define MDC800_VENDOR_ID 0x055f
#define MDC800_PRODUCT_ID 0xa800
/* Timeouts (msec) */
#define TO_DOWNLOAD_GET_READY 1500
#define TO_DOWNLOAD_GET_BUSY 1500
#define TO_WRITE_GET_READY 1000
#define TO_DEFAULT_COMMAND 5000
#define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND
#define TO_GET_READY TO_DEFAULT_COMMAND
/* Minor Number of the device (create with mknod /dev/mustek c 180 32) */
#define MDC800_DEVICE_MINOR_BASE 32
/**************************************************************************
Data and structs
***************************************************************************/
typedef enum {
NOT_CONNECTED, READY, WORKING, DOWNLOAD
} mdc800_state;
/* Data for the driver */
struct mdc800_data
{
struct usb_device * dev; // Device Data
mdc800_state state;
unsigned int endpoint [4];
struct urb * irq_urb;
wait_queue_head_t irq_wait;
int irq_woken;
char* irq_urb_buffer;
int camera_busy; // is camera busy ?
int camera_request_ready; // Status to synchronize with irq
char camera_response [8]; // last Bytes send after busy
struct urb * write_urb;
char* write_urb_buffer;
wait_queue_head_t write_wait;
int written;
struct urb * download_urb;
char* download_urb_buffer;
wait_queue_head_t download_wait;
int downloaded;
int download_left; // Bytes left to download ?
/* Device Data */
char out [64]; // Answer Buffer
int out_ptr; // Index to the first not readen byte
int out_count; // Bytes in the buffer
int open; // Camera device open ?
struct mutex io_lock; // IO -lock
char in [8]; // Command Input Buffer
int in_count;
int pic_index; // Cache for the Imagesize (-1 for nothing cached )
int pic_len;
int minor;
};
/* Specification of the Endpoints */
static struct usb_endpoint_descriptor mdc800_ed [4] =
{
{
.bLength = 0,
.bDescriptorType = 0,
.bEndpointAddress = 0x01,
.bmAttributes = 0x02,
.wMaxPacketSize = cpu_to_le16(8),
.bInterval = 0,
.bRefresh = 0,
.bSynchAddress = 0,
},
{
.bLength = 0,
.bDescriptorType = 0,
.bEndpointAddress = 0x82,
.bmAttributes = 0x03,
.wMaxPacketSize = cpu_to_le16(8),
.bInterval = 0,
.bRefresh = 0,
.bSynchAddress = 0,
},
{
.bLength = 0,
.bDescriptorType = 0,
.bEndpointAddress = 0x03,
.bmAttributes = 0x02,
.wMaxPacketSize = cpu_to_le16(64),
.bInterval = 0,
.bRefresh = 0,
.bSynchAddress = 0,
},
{
.bLength = 0,
.bDescriptorType = 0,
.bEndpointAddress = 0x84,
.bmAttributes = 0x02,
.wMaxPacketSize = cpu_to_le16(64),
.bInterval = 0,
.bRefresh = 0,
.bSynchAddress = 0,
},
};
/* The Variable used by the driver */
static struct mdc800_data* mdc800;
/***************************************************************************
The USB Part of the driver
****************************************************************************/
static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b)
{
return (
( a->bEndpointAddress == b->bEndpointAddress )
&& ( a->bmAttributes == b->bmAttributes )
&& ( a->wMaxPacketSize == b->wMaxPacketSize )
);
}
/*
* Checks whether the camera responds busy
*/
static int mdc800_isBusy (char* ch)
{
int i=0;
while (i<8)
{
if (ch [i] != (char)0x99)
return 0;
i++;
}
return 1;
}
/*
* Checks whether the Camera is ready
*/
static int mdc800_isReady (char *ch)
{
int i=0;
while (i<8)
{
if (ch [i] != (char)0xbb)
return 0;
i++;
}
return 1;
}
/*
* USB IRQ Handler for InputLine
*/
static void mdc800_usb_irq (struct urb *urb)
{
int data_received=0, wake_up;
unsigned char* b=urb->transfer_buffer;
struct mdc800_data* mdc800=urb->context;
struct device *dev = &mdc800->dev->dev;
int status = urb->status;
if (status >= 0) {
if (mdc800_isBusy (b))
{
if (!mdc800->camera_busy)
{
mdc800->camera_busy=1;
dev_dbg(dev, "gets busy\n");
}
}
else
{
if (mdc800->camera_busy && mdc800_isReady (b))
{
mdc800->camera_busy=0;
dev_dbg(dev, "gets ready\n");
}
}
if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
{
/* Store Data in camera_answer field */
dev_dbg(dev, "%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
memcpy (mdc800->camera_response,b,8);
data_received=1;
}
}
wake_up= ( mdc800->camera_request_ready > 0 )
&&
(
((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
||
((mdc800->camera_request_ready == 2) && data_received)
||
((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
||
(status < 0)
);
if (wake_up)
{
mdc800->camera_request_ready=0;
mdc800->irq_woken=1;
wake_up (&mdc800->irq_wait);
}
}
/*
* Waits a while until the irq responds that camera is ready
*
* mode : 0: Wait for camera gets ready
* 1: Wait for receiving data
* 2: Wait for camera gets busy
*
* msec: Time to wait
*/
static int mdc800_usb_waitForIRQ (int mode, int msec)
{
mdc800->camera_request_ready=1+mode;
wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken,
msecs_to_jiffies(msec));
mdc800->irq_woken = 0;
if (mdc800->camera_request_ready>0)
{
mdc800->camera_request_ready=0;
dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n");
return -1;
}
if (mdc800->state == NOT_CONNECTED)
{
printk(KERN_WARNING "mdc800: Camera gets disconnected "
"during waiting for irq.\n");
mdc800->camera_request_ready=0;
return -2;
}
return 0;
}
/*
* The write_urb callback function
*/
static void mdc800_usb_write_notify (struct urb *urb)
{
struct mdc800_data* mdc800=urb->context;
int status = urb->status;
if (status != 0)
dev_err(&mdc800->dev->dev,
"writing command fails (status=%i)\n", status);
else
mdc800->state=READY;
mdc800->written = 1;
wake_up (&mdc800->write_wait);
}
/*
* The download_urb callback function
*/
static void mdc800_usb_download_notify (struct urb *urb)
{
struct mdc800_data* mdc800=urb->context;
int status = urb->status;
if (status == 0) {
/* Fill output buffer with these data */
memcpy (mdc800->out, urb->transfer_buffer, 64);
mdc800->out_count=64;
mdc800->out_ptr=0;
mdc800->download_left-=64;
if (mdc800->download_left == 0)
{
mdc800->state=READY;
}
} else {
dev_err(&mdc800->dev->dev,
"request bytes fails (status:%i)\n", status);
}
mdc800->downloaded = 1;
wake_up (&mdc800->download_wait);
}
/***************************************************************************
Probing for the Camera
***************************************************************************/
static struct usb_driver mdc800_usb_driver;
static const struct file_operations mdc800_device_ops;
static struct usb_class_driver mdc800_class = {
.name = "mdc800%d",
.fops = &mdc800_device_ops,
.minor_base = MDC800_DEVICE_MINOR_BASE,
};
/*
* Callback to search the Mustek MDC800 on the USB Bus
*/
static int mdc800_usb_probe (struct usb_interface *intf,
const struct usb_device_id *id)
{
int i,j;
struct usb_host_interface *intf_desc;
struct usb_device *dev = interface_to_usbdev (intf);
int irq_interval=0;
int retval;
dev_dbg(&intf->dev, "(%s) called.\n", __func__);
if (mdc800->dev != NULL)
{
dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
return -ENODEV;
}
if (dev->descriptor.bNumConfigurations != 1)
{
dev_err(&intf->dev,
"probe fails -> wrong Number of Configuration\n");
return -ENODEV;
}
intf_desc = intf->cur_altsetting;
if (
( intf_desc->desc.bInterfaceClass != 0xff )
|| ( intf_desc->desc.bInterfaceSubClass != 0 )
|| ( intf_desc->desc.bInterfaceProtocol != 0 )
|| ( intf_desc->desc.bNumEndpoints != 4)
)
{
dev_err(&intf->dev, "probe fails -> wrong Interface\n");
return -ENODEV;
}
/* Check the Endpoints */
for (i=0; i<4; i++)
{
mdc800->endpoint[i]=-1;
for (j=0; j<4; j++)
{
if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
{
mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
if (i==1)
{
irq_interval=intf_desc->endpoint [j].desc.bInterval;
}
}
}
if (mdc800->endpoint[i] == -1)
{
dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n");
return -ENODEV;
}
}
dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n");
mutex_lock(&mdc800->io_lock);
retval = usb_register_dev(intf, &mdc800_class);
if (retval) {
dev_err(&intf->dev, "Not able to get a minor for this device.\n");
mutex_unlock(&mdc800->io_lock);
return -ENODEV;
}
mdc800->dev=dev;
mdc800->open=0;
/* Setup URB Structs */
usb_fill_int_urb (
mdc800->irq_urb,
mdc800->dev,
usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
mdc800->irq_urb_buffer,
8,
mdc800_usb_irq,
mdc800,
irq_interval
);
usb_fill_bulk_urb (
mdc800->write_urb,
mdc800->dev,
usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
mdc800->write_urb_buffer,
8,
mdc800_usb_write_notify,
mdc800
);
usb_fill_bulk_urb (
mdc800->download_urb,
mdc800->dev,
usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
mdc800->download_urb_buffer,
64,
mdc800_usb_download_notify,
mdc800
);
mdc800->state=READY;
mutex_unlock(&mdc800->io_lock);
usb_set_intfdata(intf, mdc800);
return 0;
}
/*
* Disconnect USB device (maybe the MDC800)
*/
static void mdc800_usb_disconnect (struct usb_interface *intf)
{
struct mdc800_data* mdc800 = usb_get_intfdata(intf);
dev_dbg(&intf->dev, "(%s) called\n", __func__);
if (mdc800) {
if (mdc800->state == NOT_CONNECTED)
return;
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);
}
dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n");
}
/***************************************************************************
The Misc device Part (file_operations)
****************************************************************************/
/*
* This Function calc the Answersize for a command.
*/
static int mdc800_getAnswerSize (char command)
{
switch ((unsigned char) command)
{
case 0x2a:
case 0x49:
case 0x51:
case 0x0d:
case 0x20:
case 0x07:
case 0x01:
case 0x25:
case 0x00:
return 8;
case 0x05:
case 0x3e:
return mdc800->pic_len;
case 0x09:
return 4096;
default:
return 0;
}
}
/*
* Init the device: (1) alloc mem (2) Increase MOD Count ..
*/
static int mdc800_device_open (struct inode* inode, struct file *file)
{
int retval=0;
int errn=0;
mutex_lock(&mdc800->io_lock);
if (mdc800->state == NOT_CONNECTED)
{
errn=-EBUSY;
goto error_out;
}
if (mdc800->open)
{
errn=-EBUSY;
goto error_out;
}
mdc800->in_count=0;
mdc800->out_count=0;
mdc800->out_ptr=0;
mdc800->pic_index=0;
mdc800->pic_len=-1;
mdc800->download_left=0;
mdc800->camera_busy=0;
mdc800->camera_request_ready=0;
retval=0;
mdc800->irq_urb->dev = mdc800->dev;
retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
if (retval) {
dev_err(&mdc800->dev->dev,
"request USB irq fails (submit_retval=%i).\n", retval);
errn = -EIO;
goto error_out;
}
mdc800->open=1;
dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n");
error_out:
mutex_unlock(&mdc800->io_lock);
return errn;
}
/*
* Close the Camera and release Memory
*/
static int mdc800_device_release (struct inode* inode, struct file *file)
{
int retval=0;
mutex_lock(&mdc800->io_lock);
if (mdc800->open && (mdc800->state != NOT_CONNECTED))
{
usb_kill_urb(mdc800->irq_urb);
usb_kill_urb(mdc800->write_urb);
usb_kill_urb(mdc800->download_urb);
mdc800->open=0;
}
else
{
retval=-EIO;
}
mutex_unlock(&mdc800->io_lock);
return retval;
}
/*
* The Device read callback Function
*/
static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
{
size_t left=len, sts=len; /* single transfer size */
char __user *ptr = buf;
int retval;
mutex_lock(&mdc800->io_lock);
if (mdc800->state == NOT_CONNECTED)
{
mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (mdc800->state == WORKING)
{
printk(KERN_WARNING "mdc800: Illegal State \"working\""
"reached during read ?!\n");
mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (!mdc800->open)
{
mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
while (left)
{
if (signal_pending (current))
{
mutex_unlock(&mdc800->io_lock);
return -EINTR;
}
sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
if (sts <= 0)
{
/* Too less Data in buffer */
if (mdc800->state == DOWNLOAD)
{
mdc800->out_count=0;
mdc800->out_ptr=0;
/* Download -> Request new bytes */
mdc800->download_urb->dev = mdc800->dev;
retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
if (retval) {
dev_err(&mdc800->dev->dev,
"Can't submit download urb "
"(retval=%i)\n", retval);
mutex_unlock(&mdc800->io_lock);
return len-left;
}
wait_event_timeout(mdc800->download_wait,
mdc800->downloaded,
msecs_to_jiffies(TO_DOWNLOAD_GET_READY));
mdc800->downloaded = 0;
if (mdc800->download_urb->status != 0)
{
dev_err(&mdc800->dev->dev,
"request download-bytes fails "
"(status=%i)\n",
mdc800->download_urb->status);
mutex_unlock(&mdc800->io_lock);
return len-left;
}
}
else
{
/* No more bytes -> that's an error*/
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
}
else
{
/* Copy Bytes */
if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
sts)) {
mutex_unlock(&mdc800->io_lock);
return -EFAULT;
}
ptr+=sts;
left-=sts;
mdc800->out_ptr+=sts;
}
}
mutex_unlock(&mdc800->io_lock);
return len-left;
}
/*
* The Device write callback Function
* If a 8Byte Command is received, it will be send to the camera.
* After this the driver initiates the request for the answer or
* just waits until the camera becomes ready.
*/
static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
{
size_t i=0;
int retval;
mutex_lock(&mdc800->io_lock);
if (mdc800->state != READY)
{
mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
if (!mdc800->open )
{
mutex_unlock(&mdc800->io_lock);
return -EBUSY;
}
while (i<len)
{
unsigned char c;
if (signal_pending (current))
{
mutex_unlock(&mdc800->io_lock);
return -EINTR;
}
if(get_user(c, buf+i))
{
mutex_unlock(&mdc800->io_lock);
return -EFAULT;
}
/* check for command start */
if (c == 0x55)
{
mdc800->in_count=0;
mdc800->out_count=0;
mdc800->out_ptr=0;
mdc800->download_left=0;
}
/* save command byte */
if (mdc800->in_count < 8)
{
mdc800->in[mdc800->in_count] = c;
mdc800->in_count++;
}
else
{
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
/* Command Buffer full ? -> send it to camera */
if (mdc800->in_count == 8)
{
int answersize;
if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
{
dev_err(&mdc800->dev->dev,
"Camera didn't get ready.\n");
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
answersize=mdc800_getAnswerSize (mdc800->in[1]);
mdc800->state=WORKING;
memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8);
mdc800->write_urb->dev = mdc800->dev;
retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
if (retval) {
dev_err(&mdc800->dev->dev,
"submitting write urb fails "
"(retval=%i)\n", retval);
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
wait_event_timeout(mdc800->write_wait, mdc800->written,
msecs_to_jiffies(TO_WRITE_GET_READY));
mdc800->written = 0;
if (mdc800->state == WORKING)
{
usb_kill_urb(mdc800->write_urb);
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
switch ((unsigned char) mdc800->in[1])
{
case 0x05: /* Download Image */
case 0x3e: /* Take shot in Fine Mode (WCam Mode) */
if (mdc800->pic_len < 0)
{
dev_err(&mdc800->dev->dev,
"call 0x07 before "
"0x05,0x3e\n");
mdc800->state=READY;
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
mdc800->pic_len=-1;
/* fall through */
case 0x09: /* Download Thumbnail */
mdc800->download_left=answersize+64;
mdc800->state=DOWNLOAD;
mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
break;
default:
if (answersize)
{
if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
{
dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n");
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
/* Write dummy data, (this is ugly but part of the USB Protocol */
/* if you use endpoint 1 as bulk and not as irq) */
memcpy (mdc800->out, mdc800->camera_response,8);
/* This is the interpreted answer */
memcpy (&mdc800->out[8], mdc800->camera_response,8);
mdc800->out_ptr=0;
mdc800->out_count=16;
/* Cache the Imagesize, if command was getImageSize */
if (mdc800->in [1] == (char) 0x07)
{
mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len);
}
}
else
{
if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
{
dev_err(&mdc800->dev->dev, "Command Timeout.\n");
mutex_unlock(&mdc800->io_lock);
return -EIO;
}
}
mdc800->state=READY;
break;
}
}
i++;
}
mutex_unlock(&mdc800->io_lock);
return i;
}
/***************************************************************************
Init and Cleanup this driver (Structs and types)
****************************************************************************/
/* File Operations of this drivers */
static const struct file_operations mdc800_device_ops =
{
.owner = THIS_MODULE,
.read = mdc800_device_read,
.write = mdc800_device_write,
.open = mdc800_device_open,
.release = mdc800_device_release,
.llseek = noop_llseek,
};
static const struct usb_device_id mdc800_table[] = {
{ USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, mdc800_table);
/*
* USB Driver Struct for this device
*/
static struct usb_driver mdc800_usb_driver =
{
.name = "mdc800",
.probe = mdc800_usb_probe,
.disconnect = mdc800_usb_disconnect,
.id_table = mdc800_table
};
/************************************************************************
Init and Cleanup this driver (Main Functions)
*************************************************************************/
static int __init usb_mdc800_init (void)
{
int retval = -ENODEV;
/* Allocate Memory */
mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
if (!mdc800)
goto cleanup_on_fail;
mdc800->dev = NULL;
mdc800->state=NOT_CONNECTED;
mutex_init (&mdc800->io_lock);
init_waitqueue_head (&mdc800->irq_wait);
init_waitqueue_head (&mdc800->write_wait);
init_waitqueue_head (&mdc800->download_wait);
mdc800->irq_woken = 0;
mdc800->downloaded = 0;
mdc800->written = 0;
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;
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);
if (retval)
goto cleanup_on_fail;
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
DRIVER_DESC "\n");
return 0;
/* Clean driver up, when something fails */
cleanup_on_fail:
if (mdc800 != NULL)
{
printk(KERN_ERR "mdc800: can't alloc memory!\n");
kfree(mdc800->download_urb_buffer);
kfree(mdc800->write_urb_buffer);
kfree(mdc800->irq_urb_buffer);
usb_free_urb(mdc800->write_urb);
usb_free_urb(mdc800->download_urb);
usb_free_urb(mdc800->irq_urb);
kfree (mdc800);
}
mdc800 = NULL;
return retval;
}
static void __exit usb_mdc800_cleanup (void)
{
usb_deregister (&mdc800_usb_driver);
usb_free_urb (mdc800->irq_urb);
usb_free_urb (mdc800->download_urb);
usb_free_urb (mdc800->write_urb);
kfree (mdc800->irq_urb_buffer);
kfree (mdc800->write_urb_buffer);
kfree (mdc800->download_urb_buffer);
kfree (mdc800);
mdc800 = NULL;
}
module_init (usb_mdc800_init);
module_exit (usb_mdc800_cleanup);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
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