1. 根目录:
2. drivers
3. usb
4. core
5. quirks.c

/*
 * 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[] = {
	/* CBM - Flash disk */
	{ USB_DEVICE(0x0204, 0x6025), .driver_info = USB_QUIRK_RESET_RESUME },

	/* HP 5300/5370C scanner */
	{ USB_DEVICE(0x03f0, 0x0701), .driver_info =
			USB_QUIRK_STRING_FETCH_255 },

	/* Creative SB Audigy 2 NX */
	{ USB_DEVICE(0x041e, 0x3020), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Logitech Harmony 700-series */
	{ USB_DEVICE(0x046d, 0xc122), .driver_info = USB_QUIRK_DELAY_INIT },

	/* Philips PSC805 audio device */
	{ USB_DEVICE(0x0471, 0x0155), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Artisman Watchdog Dongle */
	{ USB_DEVICE(0x04b4, 0x0526), .driver_info =
			USB_QUIRK_CONFIG_INTF_STRINGS },

	/* Samsung Android phone modem - ID conflict with SPH-I500 */
	{ USB_DEVICE(0x04e8, 0x6601), .driver_info =
			USB_QUIRK_CONFIG_INTF_STRINGS },

	/* Roland SC-8820 */
	{ USB_DEVICE(0x0582, 0x0007), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Edirol SD-20 */
	{ USB_DEVICE(0x0582, 0x0027), .driver_info = USB_QUIRK_RESET_RESUME },

	/* appletouch */
	{ USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Avision AV600U */
	{ USB_DEVICE(0x0638, 0x0a13), .driver_info =
	  USB_QUIRK_STRING_FETCH_255 },

	/* Saitek Cyborg Gold Joystick */
	{ USB_DEVICE(0x06a3, 0x0006), .driver_info =
			USB_QUIRK_CONFIG_INTF_STRINGS },

	/* M-Systems Flash Disk Pioneers */
	{ USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Keytouch QWERTY Panel keyboard */
	{ USB_DEVICE(0x0926, 0x3333), .driver_info =
			USB_QUIRK_CONFIG_INTF_STRINGS },

	/* X-Rite/Gretag-Macbeth Eye-One Pro display colorimeter */
	{ USB_DEVICE(0x0971, 0x2000), .driver_info = USB_QUIRK_NO_SET_INTF },

	/* Broadcom BCM92035DGROM BT dongle */
	{ USB_DEVICE(0x0a5c, 0x2021), .driver_info = USB_QUIRK_RESET_RESUME },

	/* Action Semiconductor flash disk */
	{ USB_DEVICE(0x10d6, 0x2200), .driver_info =
			USB_QUIRK_STRING_FETCH_255 },

	/* SKYMEDI USB_DRIVE */
	{ USB_DEVICE(0x1516, 0x8628), .driver_info = USB_QUIRK_RESET_RESUME },

	/* BUILDWIN Photo Frame */
	{ USB_DEVICE(0x1908, 0x1315), .driver_info =
			USB_QUIRK_HONOR_BNUMINTERFACES },

	/* INTEL VALUE SSD */
	{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },

	{ }  /* terminating entry must be last */
};

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);

	/* For the present, all devices default to USB-PERSIST enabled */
#if 0		/* was: #ifdef CONFIG_PM */
	/* Hubs are automatically enabled for USB-PERSIST */
	if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
		udev->persist_enabled = 1;

#else
	/* In the absence of PM, we can safely enable USB-PERSIST
	 * for all devices.  It will affect things like hub resets
	 * and EMF-related port disables.
	 */
	if (!(udev->quirks & USB_QUIRK_RESET_MORPHS))
		udev->persist_enabled = 1;
#endif	/* CONFIG_PM */
}