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kernel-ark/drivers/usb/misc/phidgetkit.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

739 lines
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/*
* USB PhidgetInterfaceKit driver 1.0
*
* Copyright (C) 2004, 2006 Sean Young <sean@mess.org>
* Copyright (C) 2005 Daniel Saakes <daniel@saakes.net>
* Copyright (C) 2004 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; either version 2 of the License, or
* (at your option) any later version.
*
* This is a driver for the USB PhidgetInterfaceKit.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include "phidget.h"
#define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
#define DRIVER_DESC "USB PhidgetInterfaceKit Driver"
#define USB_VENDOR_ID_GLAB 0x06c2
#define USB_DEVICE_ID_INTERFACEKIT004 0x0040
#define USB_DEVICE_ID_INTERFACEKIT01616 0x0044
#define USB_DEVICE_ID_INTERFACEKIT888 0x0045
#define USB_DEVICE_ID_INTERFACEKIT047 0x0051
#define USB_DEVICE_ID_INTERFACEKIT088 0x0053
#define USB_VENDOR_ID_WISEGROUP 0x0925
#define USB_DEVICE_ID_INTERFACEKIT884 0x8201
#define MAX_INTERFACES 16
#define URB_INT_SIZE 8
struct driver_interfacekit {
int sensors;
int inputs;
int outputs;
int has_lcd;
int amnesiac;
};
#define ifkit(_sensors, _inputs, _outputs, _lcd, _amnesiac) \
{ \
.sensors = _sensors, \
.inputs = _inputs, \
.outputs = _outputs, \
.has_lcd = _lcd, \
.amnesiac = _amnesiac \
};
static const struct driver_interfacekit ph_004 = ifkit(0, 0, 4, 0, 0);
static const struct driver_interfacekit ph_888n = ifkit(8, 8, 8, 0, 1);
static const struct driver_interfacekit ph_888o = ifkit(8, 8, 8, 0, 0);
static const struct driver_interfacekit ph_047 = ifkit(0, 4, 7, 1, 0);
static const struct driver_interfacekit ph_884 = ifkit(8, 8, 4, 0, 0);
static const struct driver_interfacekit ph_088 = ifkit(0, 8, 8, 1, 0);
static const struct driver_interfacekit ph_01616 = ifkit(0, 16, 16, 0, 0);
static unsigned long device_no;
struct interfacekit {
struct usb_device *udev;
struct usb_interface *intf;
struct driver_interfacekit *ifkit;
struct device *dev;
unsigned long outputs;
int dev_no;
u8 inputs[MAX_INTERFACES];
u16 sensors[MAX_INTERFACES];
u8 lcd_files_on;
struct urb *irq;
unsigned char *data;
dma_addr_t data_dma;
struct work_struct do_notify;
struct work_struct do_resubmit;
unsigned long input_events;
unsigned long sensor_events;
};
static struct usb_device_id id_table[] = {
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT004),
.driver_info = (kernel_ulong_t)&ph_004},
{USB_DEVICE_VER(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888, 0, 0x814),
.driver_info = (kernel_ulong_t)&ph_888o},
{USB_DEVICE_VER(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888, 0x0815, 0xffff),
.driver_info = (kernel_ulong_t)&ph_888n},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT047),
.driver_info = (kernel_ulong_t)&ph_047},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT088),
.driver_info = (kernel_ulong_t)&ph_088},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT01616),
.driver_info = (kernel_ulong_t)&ph_01616},
{USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_INTERFACEKIT884),
.driver_info = (kernel_ulong_t)&ph_884},
{}
};
MODULE_DEVICE_TABLE(usb, id_table);
static int set_outputs(struct interfacekit *kit)
{
u8 *buffer;
int retval;
buffer = kzalloc(4, GFP_KERNEL);
if (!buffer) {
dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
buffer[0] = (u8)kit->outputs;
buffer[1] = (u8)(kit->outputs >> 8);
dev_dbg(&kit->udev->dev, "sending data: 0x%04x\n", (u16)kit->outputs);
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 4, 2000);
if (retval != 4)
dev_err(&kit->udev->dev, "usb_control_msg returned %d\n",
retval);
kfree(buffer);
if (kit->ifkit->amnesiac)
schedule_delayed_work(&kit->do_resubmit, HZ / 2);
return retval < 0 ? retval : 0;
}
static int change_string(struct interfacekit *kit, const char *display, unsigned char row)
{
unsigned char *buffer;
unsigned char *form_buffer;
int retval = -ENOMEM;
int i,j, len, buf_ptr;
buffer = kmalloc(8, GFP_KERNEL);
form_buffer = kmalloc(30, GFP_KERNEL);
if ((!buffer) || (!form_buffer)) {
dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
goto exit;
}
len = strlen(display);
if (len > 20)
len = 20;
dev_dbg(&kit->udev->dev, "Setting LCD line %d to %s\n", row, display);
form_buffer[0] = row * 0x40 + 0x80;
form_buffer[1] = 0x02;
buf_ptr = 2;
for (i = 0; i<len; i++)
form_buffer[buf_ptr++] = display[i];
for (i = 0; i < (20 - len); i++)
form_buffer[buf_ptr++] = 0x20;
form_buffer[buf_ptr++] = 0x01;
form_buffer[buf_ptr++] = row * 0x40 + 0x80 + strlen(display);
for (i = 0; i < buf_ptr; i += 7) {
if ((buf_ptr - i) > 7)
len = 7;
else
len = (buf_ptr - i);
for (j = 0; j < len; j++)
buffer[j] = form_buffer[i + j];
buffer[7] = len;
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
if (retval < 0)
goto exit;
}
retval = 0;
exit:
kfree(buffer);
kfree(form_buffer);
return retval;
}
#define set_lcd_line(number) \
static ssize_t lcd_line_##number(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
change_string(kit, buf, number - 1); \
return count; \
}
#define lcd_line_attr(number) \
__ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number)
set_lcd_line(1);
set_lcd_line(2);
static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct interfacekit *kit = dev_get_drvdata(dev);
int enabled;
unsigned char *buffer;
int retval = -ENOMEM;
buffer = kzalloc(8, GFP_KERNEL);
if (!buffer) {
dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
goto exit;
}
if (sscanf(buf, "%d", &enabled) < 1) {
retval = -EINVAL;
goto exit;
}
if (enabled)
buffer[0] = 0x01;
buffer[7] = 0x11;
dev_dbg(&kit->udev->dev, "Setting backlight to %s\n", enabled ? "on" : "off");
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
if (retval < 0)
goto exit;
retval = count;
exit:
kfree(buffer);
return retval;
}
static struct device_attribute dev_lcd_line_attrs[] = {
lcd_line_attr(1),
lcd_line_attr(2),
__ATTR(backlight, S_IWUGO, NULL, set_backlight)
};
static void remove_lcd_files(struct interfacekit *kit)
{
int i;
if (kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Removing lcd files\n");
for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++)
device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
}
}
static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct interfacekit *kit = dev_get_drvdata(dev);
int enable;
int i, rc;
if (kit->ifkit->has_lcd == 0)
return -ENODEV;
if (sscanf(buf, "%d", &enable) < 1)
return -EINVAL;
if (enable) {
if (!kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Adding lcd files\n");
for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++) {
rc = device_create_file(kit->dev,
&dev_lcd_line_attrs[i]);
if (rc)
goto out;
}
kit->lcd_files_on = 1;
}
} else {
if (kit->lcd_files_on) {
remove_lcd_files(kit);
kit->lcd_files_on = 0;
}
}
return count;
out:
while (i-- > 0)
device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
return rc;
}
static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);
static void interfacekit_irq(struct urb *urb)
{
struct interfacekit *kit = urb->context;
unsigned char *buffer = kit->data;
int i, level, sensor;
int status;
switch (urb->status) {
case 0: /* success */
break;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN:
return;
/* -EPIPE: should clear the halt */
default: /* error */
goto resubmit;
}
/* digital inputs */
if (kit->ifkit->inputs == 16) {
for (i=0; i < 8; i++) {
level = (buffer[0] >> i) & 1;
if (kit->inputs[i] != level) {
kit->inputs[i] = level;
set_bit(i, &kit->input_events);
}
level = (buffer[1] >> i) & 1;
if (kit->inputs[8 + i] != level) {
kit->inputs[8 + i] = level;
set_bit(8 + i, &kit->input_events);
}
}
}
else if (kit->ifkit->inputs == 8) {
for (i=0; i < 8; i++) {
level = (buffer[1] >> i) & 1;
if (kit->inputs[i] != level) {
kit->inputs[i] = level;
set_bit(i, &kit->input_events);
}
}
}
/* analog inputs */
if (kit->ifkit->sensors) {
sensor = (buffer[0] & 1) ? 4 : 0;
level = buffer[2] + (buffer[3] & 0x0f) * 256;
if (level != kit->sensors[sensor]) {
kit->sensors[sensor] = level;
set_bit(sensor, &kit->sensor_events);
}
sensor++;
level = buffer[4] + (buffer[3] & 0xf0) * 16;
if (level != kit->sensors[sensor]) {
kit->sensors[sensor] = level;
set_bit(sensor, &kit->sensor_events);
}
sensor++;
level = buffer[5] + (buffer[6] & 0x0f) * 256;
if (level != kit->sensors[sensor]) {
kit->sensors[sensor] = level;
set_bit(sensor, &kit->sensor_events);
}
sensor++;
level = buffer[7] + (buffer[6] & 0xf0) * 16;
if (level != kit->sensors[sensor]) {
kit->sensors[sensor] = level;
set_bit(sensor, &kit->sensor_events);
}
}
if (kit->input_events || kit->sensor_events)
schedule_work(&kit->do_notify);
resubmit:
status = usb_submit_urb(urb, SLAB_ATOMIC);
if (status)
err("can't resubmit intr, %s-%s/interfacekit0, status %d",
kit->udev->bus->bus_name,
kit->udev->devpath, status);
}
static void do_notify(void *data)
{
struct interfacekit *kit = data;
int i;
char sysfs_file[8];
for (i=0; i<kit->ifkit->inputs; i++) {
if (test_and_clear_bit(i, &kit->input_events)) {
sprintf(sysfs_file, "input%d", i + 1);
sysfs_notify(&kit->dev->kobj, NULL, sysfs_file);
}
}
for (i=0; i<kit->ifkit->sensors; i++) {
if (test_and_clear_bit(i, &kit->sensor_events)) {
sprintf(sysfs_file, "sensor%d", i + 1);
sysfs_notify(&kit->dev->kobj, NULL, sysfs_file);
}
}
}
static void do_resubmit(void *data)
{
set_outputs(data);
}
#define show_set_output(value) \
static ssize_t set_output##value(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
int enable; \
int retval; \
\
if (sscanf(buf, "%d", &enable) < 1) \
return -EINVAL; \
\
if (enable) \
set_bit(value - 1, &kit->outputs); \
else \
clear_bit(value - 1, &kit->outputs); \
\
retval = set_outputs(kit); \
\
return retval ? retval : count; \
} \
\
static ssize_t show_output##value(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", !!test_bit(value - 1, &kit->outputs));\
}
#define output_attr(value) \
__ATTR(output##value, S_IWUGO | S_IRUGO, \
show_output##value, set_output##value)
show_set_output(1);
show_set_output(2);
show_set_output(3);
show_set_output(4);
show_set_output(5);
show_set_output(6);
show_set_output(7);
show_set_output(8);
show_set_output(9);
show_set_output(10);
show_set_output(11);
show_set_output(12);
show_set_output(13);
show_set_output(14);
show_set_output(15);
show_set_output(16);
static struct device_attribute dev_output_attrs[] = {
output_attr(1), output_attr(2), output_attr(3), output_attr(4),
output_attr(5), output_attr(6), output_attr(7), output_attr(8),
output_attr(9), output_attr(10), output_attr(11), output_attr(12),
output_attr(13), output_attr(14), output_attr(15), output_attr(16)
};
#define show_input(value) \
static ssize_t show_input##value(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", (int)kit->inputs[value - 1]); \
}
#define input_attr(value) \
__ATTR(input##value, S_IRUGO, show_input##value, NULL)
show_input(1);
show_input(2);
show_input(3);
show_input(4);
show_input(5);
show_input(6);
show_input(7);
show_input(8);
show_input(9);
show_input(10);
show_input(11);
show_input(12);
show_input(13);
show_input(14);
show_input(15);
show_input(16);
static struct device_attribute dev_input_attrs[] = {
input_attr(1), input_attr(2), input_attr(3), input_attr(4),
input_attr(5), input_attr(6), input_attr(7), input_attr(8),
input_attr(9), input_attr(10), input_attr(11), input_attr(12),
input_attr(13), input_attr(14), input_attr(15), input_attr(16)
};
#define show_sensor(value) \
static ssize_t show_sensor##value(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", (int)kit->sensors[value - 1]); \
}
#define sensor_attr(value) \
__ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL)
show_sensor(1);
show_sensor(2);
show_sensor(3);
show_sensor(4);
show_sensor(5);
show_sensor(6);
show_sensor(7);
show_sensor(8);
static struct device_attribute dev_sensor_attrs[] = {
sensor_attr(1), sensor_attr(2), sensor_attr(3), sensor_attr(4),
sensor_attr(5), sensor_attr(6), sensor_attr(7), sensor_attr(8)
};
static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct interfacekit *kit;
struct driver_interfacekit *ifkit;
int pipe, maxp, rc = -ENOMEM;
int bit, value, i;
ifkit = (struct driver_interfacekit *)id->driver_info;
if (!ifkit)
return -ENODEV;
interface = intf->cur_altsetting;
if (interface->desc.bNumEndpoints != 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!(endpoint->bEndpointAddress & 0x80))
return -ENODEV;
/*
* bmAttributes
*/
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
kit = kzalloc(sizeof(*kit), GFP_KERNEL);
if (!kit)
goto out;
kit->dev_no = -1;
kit->ifkit = ifkit;
kit->data = usb_buffer_alloc(dev, URB_INT_SIZE, SLAB_ATOMIC, &kit->data_dma);
if (!kit->data)
goto out;
kit->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!kit->irq)
goto out;
kit->udev = usb_get_dev(dev);
kit->intf = intf;
INIT_WORK(&kit->do_notify, do_notify, kit);
INIT_WORK(&kit->do_resubmit, do_resubmit, kit);
usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
maxp > URB_INT_SIZE ? URB_INT_SIZE : maxp,
interfacekit_irq, kit, endpoint->bInterval);
kit->irq->transfer_dma = kit->data_dma;
kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_set_intfdata(intf, kit);
do {
bit = find_first_zero_bit(&device_no, sizeof(device_no));
value = test_and_set_bit(bit, &device_no);
} while(value);
kit->dev_no = bit;
kit->dev = device_create(phidget_class, &kit->udev->dev, 0,
"interfacekit%d", kit->dev_no);
if (IS_ERR(kit->dev)) {
rc = PTR_ERR(kit->dev);
kit->dev = NULL;
goto out;
}
dev_set_drvdata(kit->dev, kit);
if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
rc = -EIO;
goto out;
}
for (i=0; i<ifkit->outputs; i++ ) {
rc = device_create_file(kit->dev, &dev_output_attrs[i]);
if (rc)
goto out2;
}
for (i=0; i<ifkit->inputs; i++ ) {
rc = device_create_file(kit->dev, &dev_input_attrs[i]);
if (rc)
goto out3;
}
for (i=0; i<ifkit->sensors; i++ ) {
rc = device_create_file(kit->dev, &dev_sensor_attrs[i]);
if (rc)
goto out4;
}
if (ifkit->has_lcd) {
rc = device_create_file(kit->dev, &dev_attr_lcd);
if (rc)
goto out4;
}
dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
ifkit->sensors, ifkit->inputs, ifkit->outputs);
return 0;
out4:
while (i-- > 0)
device_remove_file(kit->dev, &dev_sensor_attrs[i]);
i = ifkit->inputs;
out3:
while (i-- > 0)
device_remove_file(kit->dev, &dev_input_attrs[i]);
i = ifkit->outputs;
out2:
while (i-- > 0)
device_remove_file(kit->dev, &dev_output_attrs[i]);
out:
if (kit) {
if (kit->irq)
usb_free_urb(kit->irq);
if (kit->data)
usb_buffer_free(dev, URB_INT_SIZE, kit->data, kit->data_dma);
if (kit->dev)
device_unregister(kit->dev);
if (kit->dev_no >= 0)
clear_bit(kit->dev_no, &device_no);
kfree(kit);
}
return rc;
}
static void interfacekit_disconnect(struct usb_interface *interface)
{
struct interfacekit *kit;
int i;
kit = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
if (!kit)
return;
usb_kill_urb(kit->irq);
usb_free_urb(kit->irq);
usb_buffer_free(kit->udev, URB_INT_SIZE, kit->data, kit->data_dma);
cancel_delayed_work(&kit->do_notify);
cancel_delayed_work(&kit->do_resubmit);
for (i=0; i<kit->ifkit->outputs; i++)
device_remove_file(kit->dev, &dev_output_attrs[i]);
for (i=0; i<kit->ifkit->inputs; i++)
device_remove_file(kit->dev, &dev_input_attrs[i]);
for (i=0; i<kit->ifkit->sensors; i++)
device_remove_file(kit->dev, &dev_sensor_attrs[i]);
if (kit->ifkit->has_lcd) {
device_remove_file(kit->dev, &dev_attr_lcd);
remove_lcd_files(kit);
}
device_unregister(kit->dev);
dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);
usb_put_dev(kit->udev);
clear_bit(kit->dev_no, &device_no);
kfree(kit);
}
static struct usb_driver interfacekit_driver = {
.name = "phidgetkit",
.probe = interfacekit_probe,
.disconnect = interfacekit_disconnect,
.id_table = id_table
};
static int __init interfacekit_init(void)
{
int retval = 0;
retval = usb_register(&interfacekit_driver);
if (retval)
err("usb_register failed. Error number %d", retval);
return retval;
}
static void __exit interfacekit_exit(void)
{
usb_deregister(&interfacekit_driver);
}
module_init(interfacekit_init);
module_exit(interfacekit_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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