088f7fec8a
This patch (as1326) adds usb_enable_autosuspend() and usb_disable_autosuspend() routines for use by drivers. If a driver knows that its device can handle suspends and resumes correctly, it can enable autosuspend all by itself. This is equivalent to the user writing "auto" to the device's power/level attribute. The implementation differs slightly from what it used to be. Now autosuspend is disabled simply by doing usb_autoresume_device() (to increment the usage counter) and enabled by doing usb_autosuspend_device() (to decrement the usage counter). The set_level() attribute method is updated to use the new routines, and the USB Power-Management documentation is updated. The patch adds a usb_enable_autosuspend() call to the hub driver's probe routine, allowing the special-case code for hubs in quirks.c to be removed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
126 lines
3.6 KiB
C
126 lines
3.6 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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/* CBM - Flash disk */
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{ USB_DEVICE(0x0204, 0x6025), .driver_info = USB_QUIRK_RESET_RESUME },
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/* HP 5300/5370C scanner */
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{ USB_DEVICE(0x03f0, 0x0701), .driver_info =
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USB_QUIRK_STRING_FETCH_255 },
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/* Creative SB Audigy 2 NX */
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{ USB_DEVICE(0x041e, 0x3020), .driver_info = USB_QUIRK_RESET_RESUME },
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/* Philips PSC805 audio device */
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{ USB_DEVICE(0x0471, 0x0155), .driver_info = USB_QUIRK_RESET_RESUME },
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/* Roland SC-8820 */
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{ USB_DEVICE(0x0582, 0x0007), .driver_info = USB_QUIRK_RESET_RESUME },
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/* Edirol SD-20 */
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{ USB_DEVICE(0x0582, 0x0027), .driver_info = USB_QUIRK_RESET_RESUME },
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/* appletouch */
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{ USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME },
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/* Avision AV600U */
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{ USB_DEVICE(0x0638, 0x0a13), .driver_info =
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USB_QUIRK_STRING_FETCH_255 },
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/* Saitek Cyborg Gold Joystick */
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{ USB_DEVICE(0x06a3, 0x0006), .driver_info =
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USB_QUIRK_CONFIG_INTF_STRINGS },
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/* M-Systems Flash Disk Pioneers */
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{ USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },
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/* X-Rite/Gretag-Macbeth Eye-One Pro display colorimeter */
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{ USB_DEVICE(0x0971, 0x2000), .driver_info = USB_QUIRK_NO_SET_INTF },
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/* Action Semiconductor flash disk */
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{ USB_DEVICE(0x10d6, 0x2200), .driver_info =
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USB_QUIRK_STRING_FETCH_255 },
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/* SKYMEDI USB_DRIVE */
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{ USB_DEVICE(0x1516, 0x8628), .driver_info = USB_QUIRK_RESET_RESUME },
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/* INTEL VALUE SSD */
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{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
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{ } /* terminating entry must be last */
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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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/* By default, disable autosuspend for all devices. The hub driver
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* will enable it for hubs.
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*/
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usb_disable_autosuspend(udev);
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/* For the present, all devices default to USB-PERSIST enabled */
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#if 0 /* was: #ifdef CONFIG_PM */
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/* Hubs are automatically enabled for USB-PERSIST */
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if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
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udev->persist_enabled = 1;
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#else
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/* In the absence of PM, we can safely enable USB-PERSIST
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* for all devices. It will affect things like hub resets
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* and EMF-related port disables.
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*/
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if (!(udev->quirks & USB_QUIRK_RESET_MORPHS))
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udev->persist_enabled = 1;
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#endif /* CONFIG_PM */
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}
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