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/*
* USB device quirk handling logic and table
*
* Copyright (c) 2007 Oliver Neukum
* Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
*
* 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 <linux/usb.h>
#include <linux/usb/quirks.h>
#include "usb.h"
/* List of quirky USB devices. Please keep this list ordered by:
* 1) Vendor ID
* 2) Product ID
* 3) Class ID
*
* as we want specific devices to be overridden first, and only after that, any
* class specific quirks.
*
* Right now the logic aborts if it finds a valid device in the table, we might
* want to change that in the future if it turns out that a whole class of
* devices is broken...
*/
static const struct usb_device_id usb_quirk_list[] = {
/* HP 5300/5370C scanner */
{ USB_DEVICE(0x03f0, 0x0701), .driver_info = USB_QUIRK_STRING_FETCH_255 },
/* Elsa MicroLink 56k (V.250) */
{ USB_DEVICE(0x05cc, 0x2267), .driver_info = USB_QUIRK_NO_AUTOSUSPEND },
{ } /* terminating entry must be last */
};
static void usb_autosuspend_quirk(struct usb_device *udev)
{
/* unbalanced resume to prevent autosuspends */
usb_autoresume_device(udev);
}
static const struct usb_device_id *find_id(struct usb_device *udev)
{
const struct usb_device_id *id = usb_quirk_list;
for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
id->driver_info; id++) {
if (usb_match_device(udev, id))
return id;
}
return NULL;
}
/*
* Detect any quirks the device has, and do any housekeeping for it if needed.
*/
void usb_detect_quirks(struct usb_device *udev)
{
const struct usb_device_id *id = usb_quirk_list;
id = find_id(udev);
if (id)
udev->quirks = (u32)(id->driver_info);
if (udev->quirks)
dev_dbg(&udev->dev, "USB quirks for this device: %x\n",
udev->quirks);
/* do any special quirk handling here if needed */
if (udev->quirks & USB_QUIRK_NO_AUTOSUSPEND)
usb_autosuspend_quirk(udev);
}
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