diff --git a/dmx_usb_module/dmx_usb.c b/dmx_usb_module/dmx_usb.c deleted file mode 100644 --- a/dmx_usb_module/dmx_usb.c +++ /dev/null @@ -1,832 +0,0 @@ -/* - * DMX USB driver - * - * Copyright (C) 2004,2006,2010 Erwin Rol (erwin@erwinrol.com) - * - * This driver is based on the usb-skeleton driver; - * - * Copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.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. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26) -#include -#else -#include -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36) ) -#define init_MUTEX(LOCKNAME) sema_init(LOCKNAME,1); -#endif - -#include "dmx_usb.h" - -#ifdef CONFIG_USB_DEBUG - static int debug = 1; -#else - static int debug; -#endif - -/* Use our own dbg macro */ -#undef dbg -#define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg); } while (0) - -#ifndef info -#define info(format, arg...) do { printk(KERN_INFO __FILE__ ": " format "\n" , ## arg); } while (0) -#endif - -#ifndef err -#define err(format, arg...) do { printk(KERN_INFO __FILE__ ": (error) " format "\n" , ## arg); } while (0) -#endif - -/* Version Information */ -#define DRIVER_VERSION "v0.1.20111215" -#define DRIVER_AUTHOR "Erwin Rol, erwin@erwinrol.com" -#define DRIVER_DESC "DMX USB Driver" - -/* Module parameters */ -#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16) ) -MODULE_PARM(debug, "i"); -MODULE_PARM_DESC(debug, "Debug enabled or not"); -#else -//module_param(debug, bool, S_IRUGO | S_IWUSR); -//MODULE_PARM_DESC(debug, "Debug enabled or not"); -#endif - -static struct usb_device_id dmx_usb_table [] = { - { USB_DEVICE_VER(FTDI_VID, FTDI_8U232AM_PID, 0x400, 0xffff) }, - { USB_DEVICE_VER(FTDI_VID, FTDI_8U232AM_ALT_PID, 0x400, 0xffff) }, - { } /* Terminating entry */ -}; - -MODULE_DEVICE_TABLE (usb, dmx_usb_table); - -/* Get a minor range for your devices from the usb maintainer */ -#define DMX_USB_MINOR_BASE 192 - -/* Structure to hold all of our device specific stuff */ -struct dmx_usb_device { - struct usb_device * udev; /* save off the usb device pointer */ - struct usb_interface * interface; /* the interface for this device */ - unsigned char minor; /* the starting minor number for this device */ - unsigned char num_ports; /* the number of ports this device has */ - char num_interrupt_in; /* number of interrupt in endpoints we have */ - char num_bulk_in; /* number of bulk in endpoints we have */ - char num_bulk_out; /* number of bulk out endpoints we have */ - - unsigned char * bulk_in_buffer; /* the buffer to receive data */ - size_t bulk_in_size; /* the size of the receive buffer */ - __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */ - - unsigned char * bulk_out_buffer; /* the buffer to send data */ - size_t bulk_out_size; /* the size of the send buffer */ - struct urb * write_urb; /* the urb used to send data */ - __u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */ - atomic_t write_busy; /* true iff write urb is busy */ - struct completion write_finished; /* wait for the write to finish */ - - int open; /* if the port is open or not */ - int present; /* if the device is not disconnected */ - struct semaphore sem; /* locks this structure */ -}; - - -/* prevent races between open() and disconnect() */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) - static DECLARE_MUTEX(disconnect_sem); -#else - static DEFINE_SEMAPHORE(disconnect_sem); -#endif - -/* local function prototypes */ -//static ssize_t dmx_usb_read (struct file *file, char *buffer, size_t count, loff_t *ppos); -static ssize_t dmx_usb_write (struct file *file, const char *buffer, size_t count, loff_t *ppos); -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) ) -static int dmx_usb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); -#else -static long dmx_usb_ioctl (struct file *file, unsigned int cmd, unsigned long arg); -#endif -static int dmx_usb_open (struct inode *inode, struct file *file); -static int dmx_usb_release (struct inode *inode, struct file *file); - -static int dmx_usb_probe (struct usb_interface *interface, const struct usb_device_id *id); -static void dmx_usb_disconnect (struct usb_interface *interface); - -static void dmx_usb_write_bulk_callback (struct urb *urb); - -static struct file_operations dmx_usb_fops = { - /* - * The owner field is part of the module-locking - * mechanism. The idea is that the kernel knows - * which module to increment the use-counter of - * BEFORE it calls the device's open() function. - * This also means that the kernel can decrement - * the use-counter again before calling release() - * or should the open() function fail. - */ - .owner = THIS_MODULE, - - /* .read = dmx_usb_read, */ - .write = dmx_usb_write, -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) ) - .ioctl = dmx_usb_ioctl, -#else - .unlocked_ioctl = dmx_usb_ioctl, -#endif - .open = dmx_usb_open, - .release = dmx_usb_release, -}; - -/* - * usb class driver info in order to get a minor number from the usb core, - * and to have the device registered with devfs and the driver core - */ -static struct usb_class_driver dmx_usb_class = { - .name = "usb/dmx%d", - .fops = &dmx_usb_fops, - .minor_base = DMX_USB_MINOR_BASE, -}; - -/* usb specific object needed to register this driver with the usb subsystem */ -static struct usb_driver dmx_usb_driver = { -#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16) ) - .owner = THIS_MODULE, -#endif - .name = "dmx_usb", - .probe = dmx_usb_probe, - .disconnect = dmx_usb_disconnect, - .id_table = dmx_usb_table, -}; - -#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34) ) -static inline void *usb_alloc_coherent(struct usb_device *dev, size_t size, - gfp_t mem_flags, dma_addr_t *dma) -{ - return usb_buffer_alloc(dev, size, mem_flags, dma); -} - -static inline void usb_free_coherent(struct usb_device *dev, size_t size, - void *addr, dma_addr_t dma) -{ - return usb_buffer_free(dev, size, addr, dma); -} -#endif - -/** - */ -static inline void dmx_usb_debug_data (const char *function, int size, const unsigned char *data) -{ - int i; - - if (!debug) - return; - - printk (KERN_DEBUG __FILE__": %s - length = %d, data = ", - function, size); - for (i = 0; i < size; ++i) { - printk ("%.2x ", data[i]); - } - printk ("\n"); -} - -static __u32 dmx_usb_baud_to_divisor(int baud) -{ - static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; - __u32 divisor; - int divisor3 = 48000000 / 2 / baud; // divisor shifted 3 bits to the left - divisor = divisor3 >> 3; - divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; - /* Deal with special cases for highest baud rates. */ - if (divisor == 1) divisor = 0; else // 1.0 - if (divisor == 0x4001) divisor = 1; // 1.5 - return divisor; -} - -static int dmx_usb_set_speed(struct dmx_usb_device* dev) -{ - char *buf; - __u16 urb_value; - __u16 urb_index; - __u32 urb_index_value; - int rv; - - buf = kmalloc(1, GFP_NOIO); - if (!buf) - return -ENOMEM; - - urb_index_value = dmx_usb_baud_to_divisor(250000); - urb_value = (__u16)urb_index_value; - urb_index = (__u16)(urb_index_value >> 16); - - rv = usb_control_msg(dev->udev, - usb_sndctrlpipe(dev->udev, 0), - FTDI_SIO_SET_BAUDRATE_REQUEST, - FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, - urb_value, urb_index, - buf, 0, HZ*10); - - kfree(buf); - return rv; -} - -static int dmx_usb_setup(struct dmx_usb_device* dev) -{ - __u16 urb_value; - char buf[1]; - - urb_value = FTDI_SIO_SET_DATA_STOP_BITS_2 | FTDI_SIO_SET_DATA_PARITY_NONE; - urb_value |= 8; // number of data bits - - if (usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), - FTDI_SIO_SET_DATA_REQUEST, - FTDI_SIO_SET_DATA_REQUEST_TYPE, - urb_value , 0, - buf, 0, HZ*10) < 0) { - err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); - } - - if (usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), - FTDI_SIO_SET_FLOW_CTRL_REQUEST, - FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, - 0, 0, - buf, 0, HZ*10) < 0) { - err("%s error from disable flowcontrol urb", __FUNCTION__); - } - - dmx_usb_set_speed(dev); - - return 0; -} - -static void dmx_usb_set_break(struct dmx_usb_device* dev, int break_state) -{ - __u16 urb_value = FTDI_SIO_SET_DATA_STOP_BITS_2 | FTDI_SIO_SET_DATA_PARITY_NONE | 8; - - char buf[2]; - - if (break_state) { - urb_value |= FTDI_SIO_SET_BREAK; - } - - if (usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), - FTDI_SIO_SET_DATA_REQUEST, - FTDI_SIO_SET_DATA_REQUEST_TYPE, - urb_value , 0, - buf, 2, HZ*10) < 0) { - err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); - } - - - dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); -} - -/** - */ -static inline void dmx_usb_delete (struct dmx_usb_device *dev) -{ - kfree (dev->bulk_in_buffer); - usb_free_coherent (dev->udev, dev->bulk_out_size, - dev->bulk_out_buffer, - dev->write_urb->transfer_dma); - usb_free_urb (dev->write_urb); - kfree (dev); -} - - -/** - */ -static int dmx_usb_open (struct inode *inode, struct file *file) -{ - struct dmx_usb_device *dev = NULL; - struct usb_interface *interface; - int subminor; - int retval = 0; - - dbg("%s", __FUNCTION__); - - subminor = iminor(inode); - - /* prevent disconnects */ - down (&disconnect_sem); - - interface = usb_find_interface (&dmx_usb_driver, subminor); - if (!interface) { - err ("%s - error, can't find device for minor %d", - __FUNCTION__, subminor); - retval = -ENODEV; - goto exit_no_device; - } - - dev = usb_get_intfdata(interface); - if (!dev) { - retval = -ENODEV; - goto exit_no_device; - } - - /* lock this device */ - down (&dev->sem); - - /* increment our usage count for the driver */ - ++dev->open; - - /* save our object in the file's private structure */ - file->private_data = dev; - - /* unlock this device */ - up (&dev->sem); - -exit_no_device: - up (&disconnect_sem); - return retval; -} - - -/** - */ -static int dmx_usb_release (struct inode *inode, struct file *file) -{ - struct dmx_usb_device *dev; - int retval = 0; - - dev = (struct dmx_usb_device *)file->private_data; - if (dev == NULL) { - dbg ("%s - object is NULL", __FUNCTION__); - return -ENODEV; - } - - dbg("%s - minor %d", __FUNCTION__, dev->minor); - - /* lock our device */ - down (&dev->sem); - - if (dev->open <= 0) { - dbg ("%s - device not opened", __FUNCTION__); - retval = -ENODEV; - goto exit_not_opened; - } - - /* wait for any bulk writes that might be going on to finish up */ - if (atomic_read (&dev->write_busy)) - wait_for_completion (&dev->write_finished); - - --dev->open; - - if (!dev->present && !dev->open) { - /* the device was unplugged before the file was released */ - up (&dev->sem); - dmx_usb_delete (dev); - return 0; - } - -exit_not_opened: - up (&dev->sem); - - return retval; -} - -#if 0 - -Read is not yet supported - -/** - */ -static ssize_t dmx_usb_read (struct file *file, char *buffer, size_t count, loff_t *ppos) -{ - struct dmx_usb_device *dev; - int retval = 0; - int bytes_read; - - dev = (struct dmx_usb_device *)file->private_data; - - dbg("%s - minor %d, count = %Zd", __FUNCTION__, dev->minor, count); - - /* lock this object */ - down (&dev->sem); - - /* verify that the device wasn't unplugged */ - if (!dev->present) { - up (&dev->sem); - return -ENODEV; - } - - /* do a blocking bulk read to get data from the device */ - retval = usb_bulk_msg (dev->udev, - usb_rcvbulkpipe (dev->udev, - dev->bulk_in_endpointAddr), - dev->bulk_in_buffer, - min (dev->bulk_in_size, count), - &bytes_read, HZ*10); - - /* if the read was successful, copy the data to userspace */ - if (!retval) { - if (copy_to_user (buffer, dev->bulk_in_buffer+2, bytes_read-2)) - retval = -EFAULT; - else - retval = bytes_read; - } - - /* unlock the device */ - up (&dev->sem); - return retval; -} - -#endif - -static __u16 dmx_usb_get_status(struct dmx_usb_device* dev) -{ - int retval = 0; - int count = 0; - __u16 buf; - - retval = usb_bulk_msg (dev->udev, - usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr), - &buf, 2, &count, HZ*10); - - if (retval) - return 0; - - return buf; -} - - - -/** - * dmx_usb_write - * - * A device driver has to decide how to report I/O errors back to the - * user. The safest course is to wait for the transfer to finish before - * returning so that any errors will be reported reliably. dmx_usb_read() - * works like this. But waiting for I/O is slow, so many drivers only - * check for errors during I/O initiation and do not report problems - * that occur during the actual transfer. That's what we will do here. - * - * A driver concerned with maximum I/O throughput would use double- - * buffering: Two urbs would be devoted to write transfers, so that - * one urb could always be active while the other was waiting for the - * user to send more data. - */ -static ssize_t dmx_usb_write (struct file *file, const char *buffer, size_t count, loff_t *ppos) -{ - struct dmx_usb_device *dev; - ssize_t bytes_written = 0; - int retval = 0; - __u16 stat; - - dev = (struct dmx_usb_device *)file->private_data; - - dbg("%s - minor %d, count = %Zd", __FUNCTION__, dev->minor, count); - - /* lock this object */ - down (&dev->sem); - - /* verify that the device wasn't unplugged */ - if (!dev->present) { - retval = -ENODEV; - goto exit; - } - - /* verify that we actually have some data to write */ - if (count == 0) { - dbg("%s - write request of 0 bytes", __FUNCTION__); - goto exit; - } - - /* wait for a previous write to finish up; we don't use a timeout - * and so a nonresponsive device can delay us indefinitely. - */ - if (atomic_read (&dev->write_busy)) - wait_for_completion (&dev->write_finished); - - /* we can only write as much as our buffer will hold */ - bytes_written = min (dev->bulk_out_size, count); - - /* copy the data from userspace into our transfer buffer; - * this is the only copy required. - */ - if (copy_from_user(dev->write_urb->transfer_buffer, buffer, - bytes_written)) { - retval = -EFAULT; - goto exit; - } - - dmx_usb_debug_data (__FUNCTION__, bytes_written, - dev->write_urb->transfer_buffer); - - /* this urb was already set up, except for this write size */ - dev->write_urb->transfer_buffer_length = bytes_written; - - /* Poll the device to see if the transmit buffer is empty */ - do { - stat = dmx_usb_get_status(dev); - if (stat == 0) { - retval = -EFAULT; - goto exit; - } - } while ( (stat & ((FTDI_RS_TEMT) << 8) ) == 0 ) ; - - /* the transmit buffer is empty, now toggle the break */ - dmx_usb_set_break(dev, 1); - dmx_usb_set_break(dev, 0); - - /* send the data out the bulk port */ - /* a character device write uses GFP_KERNEL, - unless a spinlock is held */ - init_completion (&dev->write_finished); - atomic_set (&dev->write_busy, 1); - retval = usb_submit_urb(dev->write_urb, GFP_KERNEL); - if (retval) { - atomic_set (&dev->write_busy, 0); - err("%s - failed submitting write urb, error %d", - __FUNCTION__, retval); - } else { - retval = bytes_written; - } - -exit: - /* unlock the device */ - up (&dev->sem); - - return retval; -} - - -/** - */ -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) ) -static int dmx_usb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) -#else -static long dmx_usb_ioctl (struct file *file, unsigned int cmd, unsigned long arg) -#endif -{ - struct dmx_usb_device *dev; - - dev = (struct dmx_usb_device *)file->private_data; - - /* lock this object */ - down (&dev->sem); - - /* verify that the device wasn't unplugged */ - if (!dev->present) { - up (&dev->sem); - return -ENODEV; - } - - dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __FUNCTION__, - dev->minor, cmd, arg); - - /* fill in your device specific stuff here */ - - /* unlock the device */ - up (&dev->sem); - - /* return that we did not understand this ioctl call */ - return -ENOTTY; -} - - -/** - */ -static void dmx_usb_write_bulk_callback (struct urb *urb) -{ - struct dmx_usb_device *dev = (struct dmx_usb_device *)urb->context; - - dbg("%s - minor %d", __FUNCTION__, dev->minor); - - /* sync/async unlink faults aren't errors */ - if (urb->status && !(urb->status == -ENOENT || - urb->status == -ECONNRESET)) { - dbg("%s - nonzero write bulk status received: %d", - __FUNCTION__, urb->status); - } - - /* notify anyone waiting that the write has finished */ - atomic_set (&dev->write_busy, 0); - complete (&dev->write_finished); -} - -/** - * - * Called by the usb core when a new device is connected that it thinks - * this driver might be interested in. - */ -static int dmx_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) -{ - struct usb_device *udev = interface_to_usbdev(interface); - struct dmx_usb_device *dev = NULL; - struct usb_host_interface *iface_desc; - struct usb_endpoint_descriptor *endpoint; - size_t buffer_size; - int i; - int retval = -ENOMEM; - - /* See if the device offered us matches what we can accept */ - if ((le16_to_cpu(udev->descriptor.idVendor) != FTDI_VID) || - (le16_to_cpu(udev->descriptor.idProduct) != FTDI_8U232AM_PID)) { - return -ENODEV; - } - - /* allocate memory for our device state and initialize it */ - dev = kmalloc (sizeof(struct dmx_usb_device), GFP_KERNEL); - if (dev == NULL) { - err ("Out of memory"); - return -ENOMEM; - } - memset (dev, 0x00, sizeof (*dev)); - - init_MUTEX (&dev->sem); - dev->udev = udev; - dev->interface = interface; - - /* set up the endpoint information */ - /* check out the endpoints */ - /* use only the first bulk-in and bulk-out endpoints */ - iface_desc = &interface->altsetting[0]; - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { - endpoint = &iface_desc->endpoint[i].desc; - - if (!dev->bulk_in_endpointAddr && - (endpoint->bEndpointAddress & USB_DIR_IN) && - ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - == USB_ENDPOINT_XFER_BULK)) { - /* we found a bulk in endpoint */ - buffer_size = endpoint->wMaxPacketSize; - dev->bulk_in_size = buffer_size; - dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; - dev->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); - if (!dev->bulk_in_buffer) { - err("Couldn't allocate bulk_in_buffer"); - goto error; - } - } - - if (!dev->bulk_out_endpointAddr && - !(endpoint->bEndpointAddress & USB_DIR_IN) && - ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - == USB_ENDPOINT_XFER_BULK)) { - /* we found a bulk out endpoint */ - /* a probe() may sleep and has no restrictions on memory allocations */ - dev->write_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!dev->write_urb) { - err("No free urbs available"); - goto error; - } - dev->bulk_out_endpointAddr = endpoint->bEndpointAddress; - - /* on some platforms using this kind of buffer alloc - * call eliminates a dma "bounce buffer". - * - * NOTE: you'd normally want i/o buffers that hold - * more than one packet, so that i/o delays between - * packets don't hurt throughput. - */ - buffer_size = endpoint->wMaxPacketSize; - dev->bulk_out_size = 513; - dev->write_urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; - dev->bulk_out_buffer = usb_alloc_coherent (udev, - buffer_size, GFP_KERNEL, - &dev->write_urb->transfer_dma); - if (!dev->bulk_out_buffer) { - err("Couldn't allocate bulk_out_buffer"); - goto error; - } - usb_fill_bulk_urb(dev->write_urb, udev, - usb_sndbulkpipe(udev, - endpoint->bEndpointAddress), - dev->bulk_out_buffer, buffer_size, - dmx_usb_write_bulk_callback, dev); - } - } - if (!(dev->bulk_in_endpointAddr && dev->bulk_out_endpointAddr)) { - err("Couldn't find both bulk-in and bulk-out endpoints"); - goto error; - } - - dmx_usb_setup(dev); - - /* allow device read, write and ioctl */ - dev->present = 1; - - /* we can register the device now, as it is ready */ - usb_set_intfdata (interface, dev); - retval = usb_register_dev (interface, &dmx_usb_class); - if (retval) { - /* something prevented us from registering this driver */ - err ("Not able to get a minor for this device."); - usb_set_intfdata (interface, NULL); - goto error; - } - - dev->minor = interface->minor; - - /* let the user know what node this device is now attached to */ - info ("DMX USB device now attached to dmx%d", dev->minor); - return 0; - -error: - dmx_usb_delete (dev); - return retval; -} - - -/** - * - * Called by the usb core when the device is removed from the system. - * - * This routine guarantees that the driver will not submit any more urbs - * by clearing dev->udev. It is also supposed to terminate any currently - * active urbs. Unfortunately, usb_bulk_msg(), used in dmx_usb_read(), does - * not provide any way to do this. But at least we can cancel an active - * write. - */ -static void dmx_usb_disconnect(struct usb_interface *interface) -{ - struct dmx_usb_device *dev; - int minor; - - /* prevent races with open() */ - down (&disconnect_sem); - - dev = usb_get_intfdata (interface); - usb_set_intfdata (interface, NULL); - - down (&dev->sem); - - minor = dev->minor; - - /* give back our minor */ - usb_deregister_dev (interface, &dmx_usb_class); - - /* terminate an ongoing write */ - if (atomic_read (&dev->write_busy)) { - usb_unlink_urb (dev->write_urb); - wait_for_completion (&dev->write_finished); - } - - /* prevent device read, write and ioctl */ - dev->present = 0; - - up (&dev->sem); - - /* if the device is opened, dmx_usb_release will clean this up */ - if (!dev->open) - dmx_usb_delete (dev); - - up (&disconnect_sem); - - info("DMX USB #%d now disconnected", minor); -} - - - -/** - * dmx_usb_init - */ -static int __init dmx_usb_init(void) -{ - int result; - - /* register this driver with the USB subsystem */ - result = usb_register(&dmx_usb_driver); - if (result) { - err("usb_register failed. Error number %d", - result); - return result; - } - - info(DRIVER_DESC " " DRIVER_VERSION); - return 0; -} - - -/** - * dmx_usb_exit - */ -static void __exit dmx_usb_exit(void) -{ - /* deregister this driver with the USB subsystem */ - usb_deregister(&dmx_usb_driver); -} - - -module_init (dmx_usb_init); -module_exit (dmx_usb_exit); - -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_LICENSE("GPL"); -