55b81e6f27
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (232 commits) USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c xhci: Clean up 32-bit build warnings. USB: update documentation for usbmon usb: usb-storage doesn't support dynamic id currently, the patch disables the feature to fix an oops drivers/usb/class/cdc-acm.c: clear dangling pointer drivers/usb/dwc3/dwc3-pci.c: introduce missing kfree drivers/usb/host/isp1760-if.c: introduce missing kfree usb: option: add ZD Incorporated HSPA modem usb: ch9: fix up MaxStreams helper USB: usb-skeleton.c: cleanup open_count USB: usb-skeleton.c: fix open/disconnect race xhci: Properly handle COMP_2ND_BW_ERR USB: remove dead code from suspend/resume path USB: add quirk for another camera drivers: usb: wusbcore: Fix dependency for USB_WUSB xhci: Better debugging for critical host errors. xhci: Be less verbose during URB cancellation. xhci: Remove debugging about ring structure allocation. xhci: Remove debugging about toggling cycle bits. xhci: Remove debugging for individual transfers. ...
134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/*
|
|
* Driver for loading USB isight firmware
|
|
*
|
|
* Copyright (C) 2008 Matthew Garrett <mjg@redhat.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.
|
|
*
|
|
* The USB isight cameras in recent Apples are roughly compatible with the USB
|
|
* video class specification, and can be driven by uvcvideo. However, they
|
|
* need firmware to be loaded beforehand. After firmware loading, the device
|
|
* detaches from the USB bus and reattaches with a new device ID. It can then
|
|
* be claimed by the uvc driver.
|
|
*
|
|
* The firmware is non-free and must be extracted by the user. Tools to do this
|
|
* are available at http://bersace03.free.fr/ift/
|
|
*
|
|
* The isight firmware loading was reverse engineered by Johannes Berg
|
|
* <johannes@sipsolutions.de>, and this driver is based on code by Ronald
|
|
* Bultje <rbultje@ronald.bitfreak.net>
|
|
*/
|
|
|
|
#include <linux/usb.h>
|
|
#include <linux/firmware.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
|
|
static const struct usb_device_id id_table[] = {
|
|
{USB_DEVICE(0x05ac, 0x8300)},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
|
|
|
static int isight_firmware_load(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
int llen, len, req, ret = 0;
|
|
const struct firmware *firmware;
|
|
unsigned char *buf = kmalloc(50, GFP_KERNEL);
|
|
unsigned char data[4];
|
|
const u8 *ptr;
|
|
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
if (request_firmware(&firmware, "isight.fw", &dev->dev) != 0) {
|
|
printk(KERN_ERR "Unable to load isight firmware\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
ptr = firmware->data;
|
|
|
|
buf[0] = 0x01;
|
|
if (usb_control_msg
|
|
(dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
|
|
300) != 1) {
|
|
printk(KERN_ERR
|
|
"Failed to initialise isight firmware loader\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
while (ptr+4 <= firmware->data+firmware->size) {
|
|
memcpy(data, ptr, 4);
|
|
len = (data[0] << 8 | data[1]);
|
|
req = (data[2] << 8 | data[3]);
|
|
ptr += 4;
|
|
|
|
if (len == 0x8001)
|
|
break; /* success */
|
|
else if (len == 0)
|
|
continue;
|
|
|
|
for (; len > 0; req += 50) {
|
|
llen = min(len, 50);
|
|
len -= llen;
|
|
if (ptr+llen > firmware->data+firmware->size) {
|
|
printk(KERN_ERR
|
|
"Malformed isight firmware");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
memcpy(buf, ptr, llen);
|
|
|
|
ptr += llen;
|
|
|
|
if (usb_control_msg
|
|
(dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, req, 0,
|
|
buf, llen, 300) != llen) {
|
|
printk(KERN_ERR
|
|
"Failed to load isight firmware\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
buf[0] = 0x00;
|
|
if (usb_control_msg
|
|
(dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
|
|
300) != 1) {
|
|
printk(KERN_ERR "isight firmware loading completion failed\n");
|
|
ret = -ENODEV;
|
|
}
|
|
|
|
out:
|
|
kfree(buf);
|
|
release_firmware(firmware);
|
|
return ret;
|
|
}
|
|
|
|
MODULE_FIRMWARE("isight.fw");
|
|
|
|
static void isight_firmware_disconnect(struct usb_interface *intf)
|
|
{
|
|
}
|
|
|
|
static struct usb_driver isight_firmware_driver = {
|
|
.name = "isight_firmware",
|
|
.probe = isight_firmware_load,
|
|
.disconnect = isight_firmware_disconnect,
|
|
.id_table = id_table,
|
|
};
|
|
|
|
module_usb_driver(isight_firmware_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
|