drivers/usb/core/quirks.c

   1 /*
   2  * USB device quirk handling logic and table
   3  *
   4  * Copyright (c) 2007 Oliver Neukum
   5  * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation, version 2.
  10  *
  11  *
  12  */
  13
  14 #include <linux/usb.h>
  15 #include <linux/usb/quirks.h>
  16 #include "usb.h"
  17
  18 /* List of quirky USB devices.  Please keep this list ordered by:
  19  *      1) Vendor ID
  20  *      2) Product ID
  21  *      3) Class ID
  22  *
  23  * as we want specific devices to be overridden first, and only after that, any
  24  * class specific quirks.
  25  *
  26  * Right now the logic aborts if it finds a valid device in the table, we might
  27  * want to change that in the future if it turns out that a whole class of
  28  * devices is broken...
  29  */
  30 static const struct usb_device_id usb_quirk_list[] = {
  31         /* CBM - Flash disk */
  32         { USB_DEVICE(0x0204, 0x6025), .driver_info = USB_QUIRK_RESET_RESUME },
  33         /* HP 5300/5370C scanner */
  34         { USB_DEVICE(0x03f0, 0x0701), .driver_info = USB_QUIRK_STRING_FETCH_255 },
  35
  36         /* INTEL VALUE SSD */
  37         { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
  38
  39         /* M-Systems Flash Disk Pioneers */
  40         { USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },
  41
  42         /* Philips PSC805 audio device */
  43         { USB_DEVICE(0x0471, 0x0155), .driver_info = USB_QUIRK_RESET_RESUME },
  44
  45         /* SKYMEDI USB_DRIVE */
  46         { USB_DEVICE(0x1516, 0x8628), .driver_info = USB_QUIRK_RESET_RESUME },
  47
  48         { }  /* terminating entry must be last */
  49 };
  50
  51 static const struct usb_device_id *find_id(struct usb_device *udev)
  52 {
  53         const struct usb_device_id *id = usb_quirk_list;
  54
  55         for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
  56                         id->driver_info; id++) {
  57                 if (usb_match_device(udev, id))
  58                         return id;
  59         }
  60         return NULL;
  61 }
  62
  63 /*
  64  * Detect any quirks the device has, and do any housekeeping for it if needed.
  65  */
  66 void usb_detect_quirks(struct usb_device *udev)
  67 {
  68         const struct usb_device_id *id = usb_quirk_list;
  69
  70         id = find_id(udev);
  71         if (id)
  72                 udev->quirks = (u32)(id->driver_info);
  73         if (udev->quirks)
  74                 dev_dbg(&udev->dev, "USB quirks for this device: %x\n",
  75                                 udev->quirks);
  76
  77         /* By default, disable autosuspend for all non-hubs */
  78 #ifdef  CONFIG_USB_SUSPEND
  79         if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
  80                 udev->autosuspend_disabled = 1;
  81 #endif
  82 }