projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 7ceec1f1 ON |
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 | { | |
| b5e795f8 AS |
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 | |
| 7ceec1f1 ON |
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 | } |