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 /* HP 5300/5370C scanner */ 32 { USB_DEVICE(0x03f0, 0x0701), .driver_info = USB_QUIRK_STRING_FETCH_255 }, 33 34 /* Elsa MicroLink 56k (V.250) */ 35 { USB_DEVICE(0x05cc, 0x2267), .driver_info = USB_QUIRK_NO_AUTOSUSPEND }, 36 37 { } /* terminating entry must be last */ 38 }; 39 40 static void usb_autosuspend_quirk(struct usb_device *udev) 41 { 42 #ifdef CONFIG_USB_SUSPEND 43 /* disable autosuspend, but allow the user to re-enable it via sysfs */ 44 udev->autosuspend_delay = 0; 45 #endif 46 } 47 48 static const struct usb_device_id *find_id(struct usb_device *udev) 49 { 50 const struct usb_device_id *id = usb_quirk_list; 51 52 for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass || 53 id->driver_info; id++) { 54 if (usb_match_device(udev, id)) 55 return id; 56 } 57 return NULL; 58 } 59 60 /* 61 * Detect any quirks the device has, and do any housekeeping for it if needed. 62 */ 63 void usb_detect_quirks(struct usb_device *udev) 64 { 65 const struct usb_device_id *id = usb_quirk_list; 66 67 id = find_id(udev); 68 if (id) 69 udev->quirks = (u32)(id->driver_info); 70 if (udev->quirks) 71 dev_dbg(&udev->dev, "USB quirks for this device: %x\n", 72 udev->quirks); 73 74 /* do any special quirk handling here if needed */ 75 if (udev->quirks & USB_QUIRK_NO_AUTOSUSPEND) 76 usb_autosuspend_quirk(udev); 77 } 78