forked from Minki/linux
2add5229d7
This patch (as874) adds another piece to the user-visible part of the USB autosuspend interface. The new power/level sysfs attribute allows users to force the device on (with autosuspend off), force the device to sleep (with autoresume off), or return to normal automatic operation. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* USB device quirk handling logic and table
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*
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* Copyright (c) 2007 Oliver Neukum
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* Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 2.
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*
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*
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*/
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#include <linux/usb.h>
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#include <linux/usb/quirks.h>
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#include "usb.h"
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/* List of quirky USB devices. Please keep this list ordered by:
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* 1) Vendor ID
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* 2) Product ID
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* 3) Class ID
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*
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* as we want specific devices to be overridden first, and only after that, any
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* class specific quirks.
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*
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* Right now the logic aborts if it finds a valid device in the table, we might
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* want to change that in the future if it turns out that a whole class of
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* devices is broken...
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*/
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static const struct usb_device_id usb_quirk_list[] = {
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/* HP 5300/5370C scanner */
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{ USB_DEVICE(0x03f0, 0x0701), .driver_info = USB_QUIRK_STRING_FETCH_255 },
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/* Seiko Epson Corp - Perfection 1670 */
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{ USB_DEVICE(0x04b8, 0x011f), .driver_info = USB_QUIRK_NO_AUTOSUSPEND },
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/* Elsa MicroLink 56k (V.250) */
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{ USB_DEVICE(0x05cc, 0x2267), .driver_info = USB_QUIRK_NO_AUTOSUSPEND },
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{ } /* terminating entry must be last */
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};
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static void usb_autosuspend_quirk(struct usb_device *udev)
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{
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#ifdef CONFIG_USB_SUSPEND
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/* disable autosuspend, but allow the user to re-enable it via sysfs */
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udev->autosuspend_disabled = 1;
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#endif
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}
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static const struct usb_device_id *find_id(struct usb_device *udev)
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{
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const struct usb_device_id *id = usb_quirk_list;
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for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
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id->driver_info; id++) {
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if (usb_match_device(udev, id))
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return id;
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}
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return NULL;
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}
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/*
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* Detect any quirks the device has, and do any housekeeping for it if needed.
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*/
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void usb_detect_quirks(struct usb_device *udev)
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{
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const struct usb_device_id *id = usb_quirk_list;
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id = find_id(udev);
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if (id)
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udev->quirks = (u32)(id->driver_info);
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if (udev->quirks)
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dev_dbg(&udev->dev, "USB quirks for this device: %x\n",
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udev->quirks);
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/* do any special quirk handling here if needed */
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if (udev->quirks & USB_QUIRK_NO_AUTOSUSPEND)
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usb_autosuspend_quirk(udev);
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}
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