I am sending the driver source that is causing the
error when a device is made to connect. Shall be
grateful, if anybody can suggest a remedy.
-----------START OF SOURCE--------------------
#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef MODULE
#define MODULE
#endif
#include <linux/config.h>
#include <linux/module.h>
#if defined(CONFIG_MODVERSIONS) &&
!defined(MODVERSIONS)
#define MODVERSIONS
#endif
#ifdef MOVERSIONS
#include <linux/modversions.h>
#endif
#if LINUX_VERSION_CODE < 0x020200
#error "This modules needs kmod, so it won't run with
2.0"
#endif
#include <linux/kernel.h>
#include <linux/malloc.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <asm/uaccess.h>
#ifdef LINUX_24
static struct file_operations usb_sample_fops =
{
open: usb_open,
write: usbsample_write,
read: usbsample_read,
release: usbsample_release,
};
#define DEV_MNR 32
static struct usb_driver sample_usb_driver =
{
name: "sample",
probe: sample_probe,
disconnect: sample_disconnect,
fops: &usb_sample_fops,
minor: DEV_MNR,
id_table: sample_id_table,
};
#endif
struct sample_device //device specific structure
{
unsigned char data[8];
char *name;
struct urb myurb;
int maxp;
char output[80];
};
static struct usb_device_id sample_id_table[] =
{
{
USB_INTERFACE_INFO(3,1,2),
driver_info: (unsigned long)"mymouse"
},
{
0, //no more matches
}
};
// Function Prototypes
// ------------------
static void *sample_probe(struct usb_device*, unsigned
int ,const struct usb_device_id*);
static void sample_disconnect(struct usb_device
*udev,void *);
void sample_irq(struct urb *);
static int usb_open(struct inode *,struct file *);
//--------------------
//Globally declared variables
//---------------------------
struct usb_driver sample_usb_driver;
struct sample_device *sample;
//--------------------
static void *sample_probe(struct usb_device* udev,
unsigned int ifnum,const struct usb_device_id*
id_table)
{
struct usb_interface *iface;
struct usb_interface_descriptor *interface;
struct usb_endpoint_descriptor *endpoint;
int pipe,maxp;
printk(KERN_ALERT"this is the probe
function");
if(udev->descriptor.idVendor == 0x059b
&&
udev->descriptor.idProduct ==
0x0030)
{
/*
sample = kmalloc(sizeof(struct
sample_device),GFP_KERNEL);
if(!sample)
return NULL;
memset(sample,0,sizeof(*sample));
pipe =
usb_rcvintpipe(udev,endpoint->bEndpointAddress);
maxp =
usb_maxpacket(udev,pipe,usb_pipeout(pipe));
if(maxp>8)
maxp = 8;
sample->maxp = maxp;
FILL_BULK_URB(&sample->myurb,udev,pipe,sample->data,maxp,sample_irq,sample);
if(usb_submit_urb(&sample->myurb))
{
kfree(sample);
return NULL;
}
printk(KERN_ALERT"\nURB submitted too\n");
return sample;
*/
printk(KERN_INFO,"Probe() of the driver
called");
}
return NULL;
}
static void sample_disconnect(struct usb_device
*udev,void *clientdata)
{
//struct sample_device *sample =
clientdata;
usb_unlink_urb(&sample->myurb);
kfree(sample);
printk(KERN_ALERT "usbsample driver disconnect
function called");
return;
}
void sample_irq(struct urb * myurb)
{
char *pos = sample->output;
// if(urb_status != USB_ST_NOERROR) return;
printk(KERN_ALERT "\nusbsample: sample_irq
handle function called\n");
}
//--------------------
static int usb_open(struct inode *inode,struct file
*file)
{
printk(KERN_ALERT "\nusbsample: open called
for device\n");
return 0;
}
static ssize_t usbsample_read(struct file *filp, char
*buf, size_t count, loff_t *f_pos)
{
char *bufFrom;
sample = filp->private_data;
bufFrom = "This is the data being
copied to the user space";
copy_to_user(buf,bufFrom,sizeof(bufFrom));
printk(KERN_INFO "The Usb_sample read function
called");
return 0;
}
//----------------------
int sample_init(void)
{
printk(KERN_ALERT"Entering the sample_init
function");
return usb_register(&sample_usb_driver);
}
void sample_exit(void)
{
usb_deregister(&sample_usb_driver);
}
module_init(sample_init);
module_exit(sample_exit);
#endif
-----------------END OF SOURCE------------------
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