1682 строки
45 KiB
C
1682 строки
45 KiB
C
/*
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* USB HID support for Linux
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2007-2008 Oliver Neukum
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* Copyright (c) 2006-2010 Jiri Kosina
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*/
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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; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mm.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <asm/unaligned.h>
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#include <asm/byteorder.h>
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#include <linux/input.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/string.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include <linux/hiddev.h>
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#include <linux/hid-debug.h>
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#include <linux/hidraw.h>
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#include "usbhid.h"
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/*
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* Version Information
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*/
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#define DRIVER_DESC "USB HID core driver"
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/*
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* Module parameters.
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*/
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static unsigned int hid_mousepoll_interval;
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module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
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MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
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static unsigned int hid_jspoll_interval;
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module_param_named(jspoll, hid_jspoll_interval, uint, 0644);
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MODULE_PARM_DESC(jspoll, "Polling interval of joysticks");
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static unsigned int hid_kbpoll_interval;
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module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644);
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MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards");
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static unsigned int ignoreled;
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module_param_named(ignoreled, ignoreled, uint, 0644);
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MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
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/* Quirks specified at module load time */
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static char *quirks_param[MAX_USBHID_BOOT_QUIRKS];
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module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
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MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
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" quirks=vendorID:productID:quirks"
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" where vendorID, productID, and quirks are all in"
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" 0x-prefixed hex");
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/*
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* Input submission and I/O error handler.
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*/
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static void hid_io_error(struct hid_device *hid);
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static int hid_submit_out(struct hid_device *hid);
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static int hid_submit_ctrl(struct hid_device *hid);
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static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
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/* Start up the input URB */
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static int hid_start_in(struct hid_device *hid)
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{
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unsigned long flags;
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int rc = 0;
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struct usbhid_device *usbhid = hid->driver_data;
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spin_lock_irqsave(&usbhid->lock, flags);
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if (test_bit(HID_IN_POLLING, &usbhid->iofl) &&
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!test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
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!test_bit(HID_SUSPENDED, &usbhid->iofl) &&
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!test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
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rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
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if (rc != 0) {
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clear_bit(HID_IN_RUNNING, &usbhid->iofl);
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if (rc == -ENOSPC)
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set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
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} else {
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clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
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}
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}
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spin_unlock_irqrestore(&usbhid->lock, flags);
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return rc;
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}
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/* I/O retry timer routine */
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static void hid_retry_timeout(struct timer_list *t)
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{
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struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry);
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struct hid_device *hid = usbhid->hid;
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dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
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if (hid_start_in(hid))
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hid_io_error(hid);
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}
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/* Workqueue routine to reset the device or clear a halt */
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static void hid_reset(struct work_struct *work)
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{
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struct usbhid_device *usbhid =
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container_of(work, struct usbhid_device, reset_work);
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struct hid_device *hid = usbhid->hid;
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int rc;
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if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
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dev_dbg(&usbhid->intf->dev, "clear halt\n");
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rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
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clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
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if (rc == 0) {
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hid_start_in(hid);
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} else {
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dev_dbg(&usbhid->intf->dev,
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"clear-halt failed: %d\n", rc);
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set_bit(HID_RESET_PENDING, &usbhid->iofl);
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}
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}
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if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
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dev_dbg(&usbhid->intf->dev, "resetting device\n");
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usb_queue_reset_device(usbhid->intf);
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}
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}
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/* Main I/O error handler */
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static void hid_io_error(struct hid_device *hid)
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{
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unsigned long flags;
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struct usbhid_device *usbhid = hid->driver_data;
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spin_lock_irqsave(&usbhid->lock, flags);
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/* Stop when disconnected */
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if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
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goto done;
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/* If it has been a while since the last error, we'll assume
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* this a brand new error and reset the retry timeout. */
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if (time_after(jiffies, usbhid->stop_retry + HZ/2))
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usbhid->retry_delay = 0;
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/* When an error occurs, retry at increasing intervals */
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if (usbhid->retry_delay == 0) {
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usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
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usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
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} else if (usbhid->retry_delay < 100)
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usbhid->retry_delay *= 2;
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if (time_after(jiffies, usbhid->stop_retry)) {
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/* Retries failed, so do a port reset unless we lack bandwidth*/
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if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl)
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&& !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
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schedule_work(&usbhid->reset_work);
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goto done;
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}
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}
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mod_timer(&usbhid->io_retry,
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jiffies + msecs_to_jiffies(usbhid->retry_delay));
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done:
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spin_unlock_irqrestore(&usbhid->lock, flags);
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}
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static void usbhid_mark_busy(struct usbhid_device *usbhid)
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{
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struct usb_interface *intf = usbhid->intf;
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usb_mark_last_busy(interface_to_usbdev(intf));
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}
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static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
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{
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struct hid_device *hid = usb_get_intfdata(usbhid->intf);
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int kicked;
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int r;
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if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
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test_bit(HID_SUSPENDED, &usbhid->iofl))
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return 0;
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if ((kicked = (usbhid->outhead != usbhid->outtail))) {
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hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
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/* Try to wake up from autosuspend... */
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r = usb_autopm_get_interface_async(usbhid->intf);
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if (r < 0)
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return r;
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/*
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* If still suspended, don't submit. Submission will
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* occur if/when resume drains the queue.
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*/
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if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
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usb_autopm_put_interface_no_suspend(usbhid->intf);
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return r;
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}
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/* Asynchronously flush queue. */
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set_bit(HID_OUT_RUNNING, &usbhid->iofl);
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if (hid_submit_out(hid)) {
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clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
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usb_autopm_put_interface_async(usbhid->intf);
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}
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wake_up(&usbhid->wait);
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}
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return kicked;
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}
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static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
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{
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struct hid_device *hid = usb_get_intfdata(usbhid->intf);
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int kicked;
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int r;
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WARN_ON(hid == NULL);
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if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) ||
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test_bit(HID_SUSPENDED, &usbhid->iofl))
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return 0;
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if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
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hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
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/* Try to wake up from autosuspend... */
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r = usb_autopm_get_interface_async(usbhid->intf);
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if (r < 0)
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return r;
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/*
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* If still suspended, don't submit. Submission will
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* occur if/when resume drains the queue.
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*/
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if (test_bit(HID_SUSPENDED, &usbhid->iofl)) {
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usb_autopm_put_interface_no_suspend(usbhid->intf);
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return r;
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}
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/* Asynchronously flush queue. */
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set_bit(HID_CTRL_RUNNING, &usbhid->iofl);
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if (hid_submit_ctrl(hid)) {
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clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
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usb_autopm_put_interface_async(usbhid->intf);
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}
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wake_up(&usbhid->wait);
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}
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return kicked;
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}
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/*
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* Input interrupt completion handler.
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*/
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static void hid_irq_in(struct urb *urb)
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{
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struct hid_device *hid = urb->context;
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struct usbhid_device *usbhid = hid->driver_data;
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int status;
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switch (urb->status) {
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case 0: /* success */
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usbhid->retry_delay = 0;
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if (!test_bit(HID_OPENED, &usbhid->iofl))
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break;
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usbhid_mark_busy(usbhid);
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if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
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hid_input_report(urb->context, HID_INPUT_REPORT,
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urb->transfer_buffer,
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urb->actual_length, 1);
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/*
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* autosuspend refused while keys are pressed
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* because most keyboards don't wake up when
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* a key is released
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*/
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if (hid_check_keys_pressed(hid))
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set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
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else
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clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
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}
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break;
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case -EPIPE: /* stall */
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usbhid_mark_busy(usbhid);
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clear_bit(HID_IN_RUNNING, &usbhid->iofl);
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set_bit(HID_CLEAR_HALT, &usbhid->iofl);
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schedule_work(&usbhid->reset_work);
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return;
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case -ECONNRESET: /* unlink */
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case -ENOENT:
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case -ESHUTDOWN: /* unplug */
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clear_bit(HID_IN_RUNNING, &usbhid->iofl);
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return;
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case -EILSEQ: /* protocol error or unplug */
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case -EPROTO: /* protocol error or unplug */
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case -ETIME: /* protocol error or unplug */
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case -ETIMEDOUT: /* Should never happen, but... */
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usbhid_mark_busy(usbhid);
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clear_bit(HID_IN_RUNNING, &usbhid->iofl);
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hid_io_error(hid);
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return;
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default: /* error */
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hid_warn(urb->dev, "input irq status %d received\n",
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urb->status);
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}
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status) {
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clear_bit(HID_IN_RUNNING, &usbhid->iofl);
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if (status != -EPERM) {
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hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n",
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hid_to_usb_dev(hid)->bus->bus_name,
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hid_to_usb_dev(hid)->devpath,
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usbhid->ifnum, status);
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hid_io_error(hid);
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}
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}
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}
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static int hid_submit_out(struct hid_device *hid)
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{
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struct hid_report *report;
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char *raw_report;
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struct usbhid_device *usbhid = hid->driver_data;
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int r;
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report = usbhid->out[usbhid->outtail].report;
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raw_report = usbhid->out[usbhid->outtail].raw_report;
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usbhid->urbout->transfer_buffer_length = hid_report_len(report);
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usbhid->urbout->dev = hid_to_usb_dev(hid);
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if (raw_report) {
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memcpy(usbhid->outbuf, raw_report,
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usbhid->urbout->transfer_buffer_length);
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kfree(raw_report);
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usbhid->out[usbhid->outtail].raw_report = NULL;
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}
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dbg_hid("submitting out urb\n");
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r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC);
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if (r < 0) {
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hid_err(hid, "usb_submit_urb(out) failed: %d\n", r);
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return r;
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}
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usbhid->last_out = jiffies;
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return 0;
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}
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static int hid_submit_ctrl(struct hid_device *hid)
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{
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struct hid_report *report;
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unsigned char dir;
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char *raw_report;
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int len, r;
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struct usbhid_device *usbhid = hid->driver_data;
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report = usbhid->ctrl[usbhid->ctrltail].report;
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raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
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dir = usbhid->ctrl[usbhid->ctrltail].dir;
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len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
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if (dir == USB_DIR_OUT) {
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usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
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usbhid->urbctrl->transfer_buffer_length = len;
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if (raw_report) {
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memcpy(usbhid->ctrlbuf, raw_report, len);
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kfree(raw_report);
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usbhid->ctrl[usbhid->ctrltail].raw_report = NULL;
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}
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} else {
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int maxpacket, padlen;
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usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
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maxpacket = usb_maxpacket(hid_to_usb_dev(hid),
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usbhid->urbctrl->pipe, 0);
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if (maxpacket > 0) {
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padlen = DIV_ROUND_UP(len, maxpacket);
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padlen *= maxpacket;
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if (padlen > usbhid->bufsize)
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padlen = usbhid->bufsize;
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} else
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padlen = 0;
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usbhid->urbctrl->transfer_buffer_length = padlen;
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}
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usbhid->urbctrl->dev = hid_to_usb_dev(hid);
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usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
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usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT :
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HID_REQ_GET_REPORT;
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usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) |
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report->id);
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usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
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usbhid->cr->wLength = cpu_to_le16(len);
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dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
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usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" :
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"Get_Report",
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usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
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r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC);
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if (r < 0) {
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hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r);
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return r;
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}
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usbhid->last_ctrl = jiffies;
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return 0;
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}
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/*
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* Output interrupt completion handler.
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*/
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static void hid_irq_out(struct urb *urb)
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{
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struct hid_device *hid = urb->context;
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struct usbhid_device *usbhid = hid->driver_data;
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unsigned long flags;
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int unplug = 0;
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switch (urb->status) {
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case 0: /* success */
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break;
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case -ESHUTDOWN: /* unplug */
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unplug = 1;
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case -EILSEQ: /* protocol error or unplug */
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case -EPROTO: /* protocol error or unplug */
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case -ECONNRESET: /* unlink */
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case -ENOENT:
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break;
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default: /* error */
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hid_warn(urb->dev, "output irq status %d received\n",
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urb->status);
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}
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spin_lock_irqsave(&usbhid->lock, flags);
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if (unplug) {
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usbhid->outtail = usbhid->outhead;
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} else {
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usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
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if (usbhid->outhead != usbhid->outtail &&
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hid_submit_out(hid) == 0) {
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/* Successfully submitted next urb in queue */
|
|
spin_unlock_irqrestore(&usbhid->lock, flags);
|
|
return;
|
|
}
|
|
}
|
|
|
|
clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
|
|
spin_unlock_irqrestore(&usbhid->lock, flags);
|
|
usb_autopm_put_interface_async(usbhid->intf);
|
|
wake_up(&usbhid->wait);
|
|
}
|
|
|
|
/*
|
|
* Control pipe completion handler.
|
|
*/
|
|
|
|
static void hid_ctrl(struct urb *urb)
|
|
{
|
|
struct hid_device *hid = urb->context;
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
int unplug = 0, status = urb->status;
|
|
|
|
switch (status) {
|
|
case 0: /* success */
|
|
if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
|
|
hid_input_report(urb->context,
|
|
usbhid->ctrl[usbhid->ctrltail].report->type,
|
|
urb->transfer_buffer, urb->actual_length, 0);
|
|
break;
|
|
case -ESHUTDOWN: /* unplug */
|
|
unplug = 1;
|
|
case -EILSEQ: /* protocol error or unplug */
|
|
case -EPROTO: /* protocol error or unplug */
|
|
case -ECONNRESET: /* unlink */
|
|
case -ENOENT:
|
|
case -EPIPE: /* report not available */
|
|
break;
|
|
default: /* error */
|
|
hid_warn(urb->dev, "ctrl urb status %d received\n", status);
|
|
}
|
|
|
|
spin_lock(&usbhid->lock);
|
|
|
|
if (unplug) {
|
|
usbhid->ctrltail = usbhid->ctrlhead;
|
|
} else {
|
|
usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
|
|
|
|
if (usbhid->ctrlhead != usbhid->ctrltail &&
|
|
hid_submit_ctrl(hid) == 0) {
|
|
/* Successfully submitted next urb in queue */
|
|
spin_unlock(&usbhid->lock);
|
|
return;
|
|
}
|
|
}
|
|
|
|
clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
|
|
spin_unlock(&usbhid->lock);
|
|
usb_autopm_put_interface_async(usbhid->intf);
|
|
wake_up(&usbhid->wait);
|
|
}
|
|
|
|
static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
|
|
unsigned char dir)
|
|
{
|
|
int head;
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) ||
|
|
test_bit(HID_DISCONNECTED, &usbhid->iofl))
|
|
return;
|
|
|
|
if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
|
|
if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
|
|
hid_warn(hid, "output queue full\n");
|
|
return;
|
|
}
|
|
|
|
usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
|
|
if (!usbhid->out[usbhid->outhead].raw_report) {
|
|
hid_warn(hid, "output queueing failed\n");
|
|
return;
|
|
}
|
|
hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
|
|
usbhid->out[usbhid->outhead].report = report;
|
|
usbhid->outhead = head;
|
|
|
|
/* If the queue isn't running, restart it */
|
|
if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) {
|
|
usbhid_restart_out_queue(usbhid);
|
|
|
|
/* Otherwise see if an earlier request has timed out */
|
|
} else if (time_after(jiffies, usbhid->last_out + HZ * 5)) {
|
|
|
|
/* Prevent autosuspend following the unlink */
|
|
usb_autopm_get_interface_no_resume(usbhid->intf);
|
|
|
|
/*
|
|
* Prevent resubmission in case the URB completes
|
|
* before we can unlink it. We don't want to cancel
|
|
* the wrong transfer!
|
|
*/
|
|
usb_block_urb(usbhid->urbout);
|
|
|
|
/* Drop lock to avoid deadlock if the callback runs */
|
|
spin_unlock(&usbhid->lock);
|
|
|
|
usb_unlink_urb(usbhid->urbout);
|
|
spin_lock(&usbhid->lock);
|
|
usb_unblock_urb(usbhid->urbout);
|
|
|
|
/* Unlink might have stopped the queue */
|
|
if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl))
|
|
usbhid_restart_out_queue(usbhid);
|
|
|
|
/* Now we can allow autosuspend again */
|
|
usb_autopm_put_interface_async(usbhid->intf);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
|
|
hid_warn(hid, "control queue full\n");
|
|
return;
|
|
}
|
|
|
|
if (dir == USB_DIR_OUT) {
|
|
usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC);
|
|
if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
|
|
hid_warn(hid, "control queueing failed\n");
|
|
return;
|
|
}
|
|
hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
|
|
}
|
|
usbhid->ctrl[usbhid->ctrlhead].report = report;
|
|
usbhid->ctrl[usbhid->ctrlhead].dir = dir;
|
|
usbhid->ctrlhead = head;
|
|
|
|
/* If the queue isn't running, restart it */
|
|
if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) {
|
|
usbhid_restart_ctrl_queue(usbhid);
|
|
|
|
/* Otherwise see if an earlier request has timed out */
|
|
} else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) {
|
|
|
|
/* Prevent autosuspend following the unlink */
|
|
usb_autopm_get_interface_no_resume(usbhid->intf);
|
|
|
|
/*
|
|
* Prevent resubmission in case the URB completes
|
|
* before we can unlink it. We don't want to cancel
|
|
* the wrong transfer!
|
|
*/
|
|
usb_block_urb(usbhid->urbctrl);
|
|
|
|
/* Drop lock to avoid deadlock if the callback runs */
|
|
spin_unlock(&usbhid->lock);
|
|
|
|
usb_unlink_urb(usbhid->urbctrl);
|
|
spin_lock(&usbhid->lock);
|
|
usb_unblock_urb(usbhid->urbctrl);
|
|
|
|
/* Unlink might have stopped the queue */
|
|
if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
|
|
usbhid_restart_ctrl_queue(usbhid);
|
|
|
|
/* Now we can allow autosuspend again */
|
|
usb_autopm_put_interface_async(usbhid->intf);
|
|
}
|
|
}
|
|
|
|
static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&usbhid->lock, flags);
|
|
__usbhid_submit_report(hid, report, dir);
|
|
spin_unlock_irqrestore(&usbhid->lock, flags);
|
|
}
|
|
|
|
static int usbhid_wait_io(struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
if (!wait_event_timeout(usbhid->wait,
|
|
(!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
|
|
!test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
|
|
10*HZ)) {
|
|
dbg_hid("timeout waiting for ctrl or out queue to clear\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
|
|
ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
|
|
}
|
|
|
|
static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
|
|
unsigned char type, void *buf, int size)
|
|
{
|
|
int result, retries = 4;
|
|
|
|
memset(buf, 0, size);
|
|
|
|
do {
|
|
result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
|
|
(type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
|
|
retries--;
|
|
} while (result < size && retries);
|
|
return result;
|
|
}
|
|
|
|
static int usbhid_open(struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
int res;
|
|
|
|
set_bit(HID_OPENED, &usbhid->iofl);
|
|
|
|
if (hid->quirks & HID_QUIRK_ALWAYS_POLL)
|
|
return 0;
|
|
|
|
res = usb_autopm_get_interface(usbhid->intf);
|
|
/* the device must be awake to reliably request remote wakeup */
|
|
if (res < 0) {
|
|
clear_bit(HID_OPENED, &usbhid->iofl);
|
|
return -EIO;
|
|
}
|
|
|
|
usbhid->intf->needs_remote_wakeup = 1;
|
|
|
|
set_bit(HID_RESUME_RUNNING, &usbhid->iofl);
|
|
set_bit(HID_IN_POLLING, &usbhid->iofl);
|
|
|
|
res = hid_start_in(hid);
|
|
if (res) {
|
|
if (res != -ENOSPC) {
|
|
hid_io_error(hid);
|
|
res = 0;
|
|
} else {
|
|
/* no use opening if resources are insufficient */
|
|
res = -EBUSY;
|
|
clear_bit(HID_OPENED, &usbhid->iofl);
|
|
clear_bit(HID_IN_POLLING, &usbhid->iofl);
|
|
usbhid->intf->needs_remote_wakeup = 0;
|
|
}
|
|
}
|
|
|
|
usb_autopm_put_interface(usbhid->intf);
|
|
|
|
/*
|
|
* In case events are generated while nobody was listening,
|
|
* some are released when the device is re-opened.
|
|
* Wait 50 msec for the queue to empty before allowing events
|
|
* to go through hid.
|
|
*/
|
|
if (res == 0)
|
|
msleep(50);
|
|
|
|
clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
|
|
return res;
|
|
}
|
|
|
|
static void usbhid_close(struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
/*
|
|
* Make sure we don't restart data acquisition due to
|
|
* a resumption we no longer care about by avoiding racing
|
|
* with hid_start_in().
|
|
*/
|
|
spin_lock_irq(&usbhid->lock);
|
|
clear_bit(HID_OPENED, &usbhid->iofl);
|
|
if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL))
|
|
clear_bit(HID_IN_POLLING, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
|
|
if (hid->quirks & HID_QUIRK_ALWAYS_POLL)
|
|
return;
|
|
|
|
hid_cancel_delayed_stuff(usbhid);
|
|
usb_kill_urb(usbhid->urbin);
|
|
usbhid->intf->needs_remote_wakeup = 0;
|
|
}
|
|
|
|
/*
|
|
* Initialize all reports
|
|
*/
|
|
|
|
void usbhid_init_reports(struct hid_device *hid)
|
|
{
|
|
struct hid_report *report;
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
struct hid_report_enum *report_enum;
|
|
int err, ret;
|
|
|
|
report_enum = &hid->report_enum[HID_INPUT_REPORT];
|
|
list_for_each_entry(report, &report_enum->report_list, list)
|
|
usbhid_submit_report(hid, report, USB_DIR_IN);
|
|
|
|
report_enum = &hid->report_enum[HID_FEATURE_REPORT];
|
|
list_for_each_entry(report, &report_enum->report_list, list)
|
|
usbhid_submit_report(hid, report, USB_DIR_IN);
|
|
|
|
err = 0;
|
|
ret = usbhid_wait_io(hid);
|
|
while (ret) {
|
|
err |= ret;
|
|
if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
|
|
usb_kill_urb(usbhid->urbctrl);
|
|
if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
|
|
usb_kill_urb(usbhid->urbout);
|
|
ret = usbhid_wait_io(hid);
|
|
}
|
|
|
|
if (err)
|
|
hid_warn(hid, "timeout initializing reports\n");
|
|
}
|
|
|
|
/*
|
|
* Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
|
|
*/
|
|
static int hid_find_field_early(struct hid_device *hid, unsigned int page,
|
|
unsigned int hid_code, struct hid_field **pfield)
|
|
{
|
|
struct hid_report *report;
|
|
struct hid_field *field;
|
|
struct hid_usage *usage;
|
|
int i, j;
|
|
|
|
list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
|
|
for (i = 0; i < report->maxfield; i++) {
|
|
field = report->field[i];
|
|
for (j = 0; j < field->maxusage; j++) {
|
|
usage = &field->usage[j];
|
|
if ((usage->hid & HID_USAGE_PAGE) == page &&
|
|
(usage->hid & 0xFFFF) == hid_code) {
|
|
*pfield = field;
|
|
return j;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void usbhid_set_leds(struct hid_device *hid)
|
|
{
|
|
struct hid_field *field;
|
|
int offset;
|
|
|
|
if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
|
|
hid_set_field(field, offset, 0);
|
|
usbhid_submit_report(hid, field->report, USB_DIR_OUT);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the supplied list of reports and find the longest
|
|
*/
|
|
static void hid_find_max_report(struct hid_device *hid, unsigned int type,
|
|
unsigned int *max)
|
|
{
|
|
struct hid_report *report;
|
|
unsigned int size;
|
|
|
|
list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
|
|
size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
|
|
if (*max < size)
|
|
*max = size;
|
|
}
|
|
}
|
|
|
|
static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
|
|
&usbhid->inbuf_dma);
|
|
usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
|
|
&usbhid->outbuf_dma);
|
|
usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL);
|
|
usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL,
|
|
&usbhid->ctrlbuf_dma);
|
|
if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
|
|
!usbhid->ctrlbuf)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbhid_get_raw_report(struct hid_device *hid,
|
|
unsigned char report_number, __u8 *buf, size_t count,
|
|
unsigned char report_type)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
struct usb_device *dev = hid_to_usb_dev(hid);
|
|
struct usb_interface *intf = usbhid->intf;
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
int skipped_report_id = 0;
|
|
int ret;
|
|
|
|
/* Byte 0 is the report number. Report data starts at byte 1.*/
|
|
buf[0] = report_number;
|
|
if (report_number == 0x0) {
|
|
/* Offset the return buffer by 1, so that the report ID
|
|
will remain in byte 0. */
|
|
buf++;
|
|
count--;
|
|
skipped_report_id = 1;
|
|
}
|
|
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
HID_REQ_GET_REPORT,
|
|
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
((report_type + 1) << 8) | report_number,
|
|
interface->desc.bInterfaceNumber, buf, count,
|
|
USB_CTRL_SET_TIMEOUT);
|
|
|
|
/* count also the report id */
|
|
if (ret > 0 && skipped_report_id)
|
|
ret++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum,
|
|
__u8 *buf, size_t count, unsigned char rtype)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
struct usb_device *dev = hid_to_usb_dev(hid);
|
|
struct usb_interface *intf = usbhid->intf;
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
int ret, skipped_report_id = 0;
|
|
|
|
/* Byte 0 is the report number. Report data starts at byte 1.*/
|
|
if ((rtype == HID_OUTPUT_REPORT) &&
|
|
(hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID))
|
|
buf[0] = 0;
|
|
else
|
|
buf[0] = reportnum;
|
|
|
|
if (buf[0] == 0x0) {
|
|
/* Don't send the Report ID */
|
|
buf++;
|
|
count--;
|
|
skipped_report_id = 1;
|
|
}
|
|
|
|
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
HID_REQ_SET_REPORT,
|
|
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
((rtype + 1) << 8) | reportnum,
|
|
interface->desc.bInterfaceNumber, buf, count,
|
|
USB_CTRL_SET_TIMEOUT);
|
|
/* count also the report id, if this was a numbered report. */
|
|
if (ret > 0 && skipped_report_id)
|
|
ret++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
struct usb_device *dev = hid_to_usb_dev(hid);
|
|
int actual_length, skipped_report_id = 0, ret;
|
|
|
|
if (!usbhid->urbout)
|
|
return -ENOSYS;
|
|
|
|
if (buf[0] == 0x0) {
|
|
/* Don't send the Report ID */
|
|
buf++;
|
|
count--;
|
|
skipped_report_id = 1;
|
|
}
|
|
|
|
ret = usb_interrupt_msg(dev, usbhid->urbout->pipe,
|
|
buf, count, &actual_length,
|
|
USB_CTRL_SET_TIMEOUT);
|
|
/* return the number of bytes transferred */
|
|
if (ret == 0) {
|
|
ret = actual_length;
|
|
/* count also the report id */
|
|
if (skipped_report_id)
|
|
ret++;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
|
|
usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
|
|
kfree(usbhid->cr);
|
|
usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
|
|
}
|
|
|
|
static int usbhid_parse(struct hid_device *hid)
|
|
{
|
|
struct usb_interface *intf = to_usb_interface(hid->dev.parent);
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
struct usb_device *dev = interface_to_usbdev (intf);
|
|
struct hid_descriptor *hdesc;
|
|
u32 quirks = 0;
|
|
unsigned int rsize = 0;
|
|
char *rdesc;
|
|
int ret, n;
|
|
int num_descriptors;
|
|
size_t offset = offsetof(struct hid_descriptor, desc);
|
|
|
|
quirks = hid_lookup_quirk(hid);
|
|
|
|
if (quirks & HID_QUIRK_IGNORE)
|
|
return -ENODEV;
|
|
|
|
/* Many keyboards and mice don't like to be polled for reports,
|
|
* so we will always set the HID_QUIRK_NOGET flag for them. */
|
|
if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
|
|
if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
|
|
interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
|
|
quirks |= HID_QUIRK_NOGET;
|
|
}
|
|
|
|
if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
|
|
(!interface->desc.bNumEndpoints ||
|
|
usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
|
|
dbg_hid("class descriptor not present\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (hdesc->bLength < sizeof(struct hid_descriptor)) {
|
|
dbg_hid("hid descriptor is too short\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
hid->version = le16_to_cpu(hdesc->bcdHID);
|
|
hid->country = hdesc->bCountryCode;
|
|
|
|
num_descriptors = min_t(int, hdesc->bNumDescriptors,
|
|
(hdesc->bLength - offset) / sizeof(struct hid_class_descriptor));
|
|
|
|
for (n = 0; n < num_descriptors; n++)
|
|
if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
|
|
rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
|
|
|
|
if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
|
|
dbg_hid("weird size of report descriptor (%u)\n", rsize);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rdesc = kmalloc(rsize, GFP_KERNEL);
|
|
if (!rdesc)
|
|
return -ENOMEM;
|
|
|
|
hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
|
|
|
|
ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
|
|
HID_DT_REPORT, rdesc, rsize);
|
|
if (ret < 0) {
|
|
dbg_hid("reading report descriptor failed\n");
|
|
kfree(rdesc);
|
|
goto err;
|
|
}
|
|
|
|
ret = hid_parse_report(hid, rdesc, rsize);
|
|
kfree(rdesc);
|
|
if (ret) {
|
|
dbg_hid("parsing report descriptor failed\n");
|
|
goto err;
|
|
}
|
|
|
|
hid->quirks |= quirks;
|
|
|
|
return 0;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int usbhid_start(struct hid_device *hid)
|
|
{
|
|
struct usb_interface *intf = to_usb_interface(hid->dev.parent);
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
unsigned int n, insize = 0;
|
|
int ret;
|
|
|
|
clear_bit(HID_DISCONNECTED, &usbhid->iofl);
|
|
|
|
usbhid->bufsize = HID_MIN_BUFFER_SIZE;
|
|
hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
|
|
hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
|
|
hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
|
|
|
|
if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
|
|
usbhid->bufsize = HID_MAX_BUFFER_SIZE;
|
|
|
|
hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
|
|
|
|
if (insize > HID_MAX_BUFFER_SIZE)
|
|
insize = HID_MAX_BUFFER_SIZE;
|
|
|
|
if (hid_alloc_buffers(dev, hid)) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
for (n = 0; n < interface->desc.bNumEndpoints; n++) {
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
int pipe;
|
|
int interval;
|
|
|
|
endpoint = &interface->endpoint[n].desc;
|
|
if (!usb_endpoint_xfer_int(endpoint))
|
|
continue;
|
|
|
|
interval = endpoint->bInterval;
|
|
|
|
/* Some vendors give fullspeed interval on highspeed devides */
|
|
if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
|
|
dev->speed == USB_SPEED_HIGH) {
|
|
interval = fls(endpoint->bInterval*8);
|
|
pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
|
|
hid->name, endpoint->bInterval, interval);
|
|
}
|
|
|
|
/* Change the polling interval of mice, joysticks
|
|
* and keyboards.
|
|
*/
|
|
switch (hid->collection->usage) {
|
|
case HID_GD_MOUSE:
|
|
if (hid_mousepoll_interval > 0)
|
|
interval = hid_mousepoll_interval;
|
|
break;
|
|
case HID_GD_JOYSTICK:
|
|
if (hid_jspoll_interval > 0)
|
|
interval = hid_jspoll_interval;
|
|
break;
|
|
case HID_GD_KEYBOARD:
|
|
if (hid_kbpoll_interval > 0)
|
|
interval = hid_kbpoll_interval;
|
|
break;
|
|
}
|
|
|
|
ret = -ENOMEM;
|
|
if (usb_endpoint_dir_in(endpoint)) {
|
|
if (usbhid->urbin)
|
|
continue;
|
|
if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
|
|
goto fail;
|
|
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
|
|
usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
|
|
hid_irq_in, hid, interval);
|
|
usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
|
|
usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
} else {
|
|
if (usbhid->urbout)
|
|
continue;
|
|
if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
|
|
goto fail;
|
|
pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
|
|
usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
|
|
hid_irq_out, hid, interval);
|
|
usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
|
|
usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
}
|
|
}
|
|
|
|
usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!usbhid->urbctrl) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
|
|
usbhid->ctrlbuf, 1, hid_ctrl, hid);
|
|
usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
|
|
usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
set_bit(HID_STARTED, &usbhid->iofl);
|
|
|
|
if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
|
|
ret = usb_autopm_get_interface(usbhid->intf);
|
|
if (ret)
|
|
goto fail;
|
|
set_bit(HID_IN_POLLING, &usbhid->iofl);
|
|
usbhid->intf->needs_remote_wakeup = 1;
|
|
ret = hid_start_in(hid);
|
|
if (ret) {
|
|
dev_err(&hid->dev,
|
|
"failed to start in urb: %d\n", ret);
|
|
}
|
|
usb_autopm_put_interface(usbhid->intf);
|
|
}
|
|
|
|
/* Some keyboards don't work until their LEDs have been set.
|
|
* Since BIOSes do set the LEDs, it must be safe for any device
|
|
* that supports the keyboard boot protocol.
|
|
* In addition, enable remote wakeup by default for all keyboard
|
|
* devices supporting the boot protocol.
|
|
*/
|
|
if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
|
|
interface->desc.bInterfaceProtocol ==
|
|
USB_INTERFACE_PROTOCOL_KEYBOARD) {
|
|
usbhid_set_leds(hid);
|
|
device_set_wakeup_enable(&dev->dev, 1);
|
|
}
|
|
return 0;
|
|
|
|
fail:
|
|
usb_free_urb(usbhid->urbin);
|
|
usb_free_urb(usbhid->urbout);
|
|
usb_free_urb(usbhid->urbctrl);
|
|
usbhid->urbin = NULL;
|
|
usbhid->urbout = NULL;
|
|
usbhid->urbctrl = NULL;
|
|
hid_free_buffers(dev, hid);
|
|
return ret;
|
|
}
|
|
|
|
static void usbhid_stop(struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
if (WARN_ON(!usbhid))
|
|
return;
|
|
|
|
if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
|
|
clear_bit(HID_IN_POLLING, &usbhid->iofl);
|
|
usbhid->intf->needs_remote_wakeup = 0;
|
|
}
|
|
|
|
clear_bit(HID_STARTED, &usbhid->iofl);
|
|
spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
|
|
set_bit(HID_DISCONNECTED, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
usb_kill_urb(usbhid->urbin);
|
|
usb_kill_urb(usbhid->urbout);
|
|
usb_kill_urb(usbhid->urbctrl);
|
|
|
|
hid_cancel_delayed_stuff(usbhid);
|
|
|
|
hid->claimed = 0;
|
|
|
|
usb_free_urb(usbhid->urbin);
|
|
usb_free_urb(usbhid->urbctrl);
|
|
usb_free_urb(usbhid->urbout);
|
|
usbhid->urbin = NULL; /* don't mess up next start */
|
|
usbhid->urbctrl = NULL;
|
|
usbhid->urbout = NULL;
|
|
|
|
hid_free_buffers(hid_to_usb_dev(hid), hid);
|
|
}
|
|
|
|
static int usbhid_power(struct hid_device *hid, int lvl)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
int r = 0;
|
|
|
|
switch (lvl) {
|
|
case PM_HINT_FULLON:
|
|
r = usb_autopm_get_interface(usbhid->intf);
|
|
break;
|
|
|
|
case PM_HINT_NORMAL:
|
|
usb_autopm_put_interface(usbhid->intf);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
|
|
{
|
|
switch (reqtype) {
|
|
case HID_REQ_GET_REPORT:
|
|
usbhid_submit_report(hid, rep, USB_DIR_IN);
|
|
break;
|
|
case HID_REQ_SET_REPORT:
|
|
usbhid_submit_report(hid, rep, USB_DIR_OUT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum,
|
|
__u8 *buf, size_t len, unsigned char rtype,
|
|
int reqtype)
|
|
{
|
|
switch (reqtype) {
|
|
case HID_REQ_GET_REPORT:
|
|
return usbhid_get_raw_report(hid, reportnum, buf, len, rtype);
|
|
case HID_REQ_SET_REPORT:
|
|
return usbhid_set_raw_report(hid, reportnum, buf, len, rtype);
|
|
default:
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
static int usbhid_idle(struct hid_device *hid, int report, int idle,
|
|
int reqtype)
|
|
{
|
|
struct usb_device *dev = hid_to_usb_dev(hid);
|
|
struct usb_interface *intf = to_usb_interface(hid->dev.parent);
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
int ifnum = interface->desc.bInterfaceNumber;
|
|
|
|
if (reqtype != HID_REQ_SET_IDLE)
|
|
return -EINVAL;
|
|
|
|
return hid_set_idle(dev, ifnum, report, idle);
|
|
}
|
|
|
|
struct hid_ll_driver usb_hid_driver = {
|
|
.parse = usbhid_parse,
|
|
.start = usbhid_start,
|
|
.stop = usbhid_stop,
|
|
.open = usbhid_open,
|
|
.close = usbhid_close,
|
|
.power = usbhid_power,
|
|
.request = usbhid_request,
|
|
.wait = usbhid_wait_io,
|
|
.raw_request = usbhid_raw_request,
|
|
.output_report = usbhid_output_report,
|
|
.idle = usbhid_idle,
|
|
};
|
|
EXPORT_SYMBOL_GPL(usb_hid_driver);
|
|
|
|
static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
|
|
{
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
struct usbhid_device *usbhid;
|
|
struct hid_device *hid;
|
|
unsigned int n, has_in = 0;
|
|
size_t len;
|
|
int ret;
|
|
|
|
dbg_hid("HID probe called for ifnum %d\n",
|
|
intf->altsetting->desc.bInterfaceNumber);
|
|
|
|
for (n = 0; n < interface->desc.bNumEndpoints; n++)
|
|
if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
|
|
has_in++;
|
|
if (!has_in) {
|
|
hid_err(intf, "couldn't find an input interrupt endpoint\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
hid = hid_allocate_device();
|
|
if (IS_ERR(hid))
|
|
return PTR_ERR(hid);
|
|
|
|
usb_set_intfdata(intf, hid);
|
|
hid->ll_driver = &usb_hid_driver;
|
|
hid->ff_init = hid_pidff_init;
|
|
#ifdef CONFIG_USB_HIDDEV
|
|
hid->hiddev_connect = hiddev_connect;
|
|
hid->hiddev_disconnect = hiddev_disconnect;
|
|
hid->hiddev_hid_event = hiddev_hid_event;
|
|
hid->hiddev_report_event = hiddev_report_event;
|
|
#endif
|
|
hid->dev.parent = &intf->dev;
|
|
hid->bus = BUS_USB;
|
|
hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
|
|
hid->product = le16_to_cpu(dev->descriptor.idProduct);
|
|
hid->version = le16_to_cpu(dev->descriptor.bcdDevice);
|
|
hid->name[0] = 0;
|
|
if (intf->cur_altsetting->desc.bInterfaceProtocol ==
|
|
USB_INTERFACE_PROTOCOL_MOUSE)
|
|
hid->type = HID_TYPE_USBMOUSE;
|
|
else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0)
|
|
hid->type = HID_TYPE_USBNONE;
|
|
|
|
if (dev->manufacturer)
|
|
strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
|
|
|
|
if (dev->product) {
|
|
if (dev->manufacturer)
|
|
strlcat(hid->name, " ", sizeof(hid->name));
|
|
strlcat(hid->name, dev->product, sizeof(hid->name));
|
|
}
|
|
|
|
if (!strlen(hid->name))
|
|
snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
|
|
le16_to_cpu(dev->descriptor.idVendor),
|
|
le16_to_cpu(dev->descriptor.idProduct));
|
|
|
|
usb_make_path(dev, hid->phys, sizeof(hid->phys));
|
|
strlcat(hid->phys, "/input", sizeof(hid->phys));
|
|
len = strlen(hid->phys);
|
|
if (len < sizeof(hid->phys) - 1)
|
|
snprintf(hid->phys + len, sizeof(hid->phys) - len,
|
|
"%d", intf->altsetting[0].desc.bInterfaceNumber);
|
|
|
|
if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
|
|
hid->uniq[0] = 0;
|
|
|
|
usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
|
|
if (usbhid == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
hid->driver_data = usbhid;
|
|
usbhid->hid = hid;
|
|
usbhid->intf = intf;
|
|
usbhid->ifnum = interface->desc.bInterfaceNumber;
|
|
|
|
init_waitqueue_head(&usbhid->wait);
|
|
INIT_WORK(&usbhid->reset_work, hid_reset);
|
|
timer_setup(&usbhid->io_retry, hid_retry_timeout, 0);
|
|
spin_lock_init(&usbhid->lock);
|
|
|
|
ret = hid_add_device(hid);
|
|
if (ret) {
|
|
if (ret != -ENODEV)
|
|
hid_err(intf, "can't add hid device: %d\n", ret);
|
|
goto err_free;
|
|
}
|
|
|
|
return 0;
|
|
err_free:
|
|
kfree(usbhid);
|
|
err:
|
|
hid_destroy_device(hid);
|
|
return ret;
|
|
}
|
|
|
|
static void usbhid_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct hid_device *hid = usb_get_intfdata(intf);
|
|
struct usbhid_device *usbhid;
|
|
|
|
if (WARN_ON(!hid))
|
|
return;
|
|
|
|
usbhid = hid->driver_data;
|
|
spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
|
|
set_bit(HID_DISCONNECTED, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
hid_destroy_device(hid);
|
|
kfree(usbhid);
|
|
}
|
|
|
|
static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
|
|
{
|
|
del_timer_sync(&usbhid->io_retry);
|
|
cancel_work_sync(&usbhid->reset_work);
|
|
}
|
|
|
|
static void hid_cease_io(struct usbhid_device *usbhid)
|
|
{
|
|
del_timer_sync(&usbhid->io_retry);
|
|
usb_kill_urb(usbhid->urbin);
|
|
usb_kill_urb(usbhid->urbctrl);
|
|
usb_kill_urb(usbhid->urbout);
|
|
}
|
|
|
|
static void hid_restart_io(struct hid_device *hid)
|
|
{
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl);
|
|
int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl);
|
|
|
|
spin_lock_irq(&usbhid->lock);
|
|
clear_bit(HID_SUSPENDED, &usbhid->iofl);
|
|
usbhid_mark_busy(usbhid);
|
|
|
|
if (clear_halt || reset_pending)
|
|
schedule_work(&usbhid->reset_work);
|
|
usbhid->retry_delay = 0;
|
|
spin_unlock_irq(&usbhid->lock);
|
|
|
|
if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl))
|
|
return;
|
|
|
|
if (!clear_halt) {
|
|
if (hid_start_in(hid) < 0)
|
|
hid_io_error(hid);
|
|
}
|
|
|
|
spin_lock_irq(&usbhid->lock);
|
|
if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl))
|
|
usbhid_restart_out_queue(usbhid);
|
|
if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
|
|
usbhid_restart_ctrl_queue(usbhid);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
}
|
|
|
|
/* Treat USB reset pretty much the same as suspend/resume */
|
|
static int hid_pre_reset(struct usb_interface *intf)
|
|
{
|
|
struct hid_device *hid = usb_get_intfdata(intf);
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
|
|
spin_lock_irq(&usbhid->lock);
|
|
set_bit(HID_RESET_PENDING, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
hid_cease_io(usbhid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Same routine used for post_reset and reset_resume */
|
|
static int hid_post_reset(struct usb_interface *intf)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev (intf);
|
|
struct hid_device *hid = usb_get_intfdata(intf);
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
struct usb_host_interface *interface = intf->cur_altsetting;
|
|
int status;
|
|
char *rdesc;
|
|
|
|
/* Fetch and examine the HID report descriptor. If this
|
|
* has changed, then rebind. Since usbcore's check of the
|
|
* configuration descriptors passed, we already know that
|
|
* the size of the HID report descriptor has not changed.
|
|
*/
|
|
rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL);
|
|
if (!rdesc)
|
|
return -ENOMEM;
|
|
|
|
status = hid_get_class_descriptor(dev,
|
|
interface->desc.bInterfaceNumber,
|
|
HID_DT_REPORT, rdesc, hid->dev_rsize);
|
|
if (status < 0) {
|
|
dbg_hid("reading report descriptor failed (post_reset)\n");
|
|
kfree(rdesc);
|
|
return status;
|
|
}
|
|
status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize);
|
|
kfree(rdesc);
|
|
if (status != 0) {
|
|
dbg_hid("report descriptor changed\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
/* No need to do another reset or clear a halted endpoint */
|
|
spin_lock_irq(&usbhid->lock);
|
|
clear_bit(HID_RESET_PENDING, &usbhid->iofl);
|
|
clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
|
|
|
|
hid_restart_io(hid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int hid_resume_common(struct hid_device *hid, bool driver_suspended)
|
|
{
|
|
int status = 0;
|
|
|
|
hid_restart_io(hid);
|
|
if (driver_suspended && hid->driver && hid->driver->resume)
|
|
status = hid->driver->resume(hid);
|
|
return status;
|
|
}
|
|
|
|
static int hid_suspend(struct usb_interface *intf, pm_message_t message)
|
|
{
|
|
struct hid_device *hid = usb_get_intfdata(intf);
|
|
struct usbhid_device *usbhid = hid->driver_data;
|
|
int status = 0;
|
|
bool driver_suspended = false;
|
|
unsigned int ledcount;
|
|
|
|
if (PMSG_IS_AUTO(message)) {
|
|
ledcount = hidinput_count_leds(hid);
|
|
spin_lock_irq(&usbhid->lock); /* Sync with error handler */
|
|
if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
|
|
&& !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
|
|
&& !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
|
|
&& !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
|
|
&& !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
|
|
&& (!ledcount || ignoreled))
|
|
{
|
|
set_bit(HID_SUSPENDED, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
if (hid->driver && hid->driver->suspend) {
|
|
status = hid->driver->suspend(hid, message);
|
|
if (status < 0)
|
|
goto failed;
|
|
}
|
|
driver_suspended = true;
|
|
} else {
|
|
usbhid_mark_busy(usbhid);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
} else {
|
|
/* TODO: resume() might need to handle suspend failure */
|
|
if (hid->driver && hid->driver->suspend)
|
|
status = hid->driver->suspend(hid, message);
|
|
driver_suspended = true;
|
|
spin_lock_irq(&usbhid->lock);
|
|
set_bit(HID_SUSPENDED, &usbhid->iofl);
|
|
spin_unlock_irq(&usbhid->lock);
|
|
if (usbhid_wait_io(hid) < 0)
|
|
status = -EIO;
|
|
}
|
|
|
|
hid_cancel_delayed_stuff(usbhid);
|
|
hid_cease_io(usbhid);
|
|
|
|
if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
|
|
/* lost race against keypresses */
|
|
status = -EBUSY;
|
|
goto failed;
|
|
}
|
|
dev_dbg(&intf->dev, "suspend\n");
|
|
return status;
|
|
|
|
failed:
|
|
hid_resume_common(hid, driver_suspended);
|
|
return status;
|
|
}
|
|
|
|
static int hid_resume(struct usb_interface *intf)
|
|
{
|
|
struct hid_device *hid = usb_get_intfdata (intf);
|
|
int status;
|
|
|
|
status = hid_resume_common(hid, true);
|
|
dev_dbg(&intf->dev, "resume status %d\n", status);
|
|
return 0;
|
|
}
|
|
|
|
static int hid_reset_resume(struct usb_interface *intf)
|
|
{
|
|
struct hid_device *hid = usb_get_intfdata(intf);
|
|
int status;
|
|
|
|
status = hid_post_reset(intf);
|
|
if (status >= 0 && hid->driver && hid->driver->reset_resume) {
|
|
int ret = hid->driver->reset_resume(hid);
|
|
if (ret < 0)
|
|
status = ret;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct usb_device_id hid_usb_ids[] = {
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
|
|
.bInterfaceClass = USB_INTERFACE_CLASS_HID },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE (usb, hid_usb_ids);
|
|
|
|
static struct usb_driver hid_driver = {
|
|
.name = "usbhid",
|
|
.probe = usbhid_probe,
|
|
.disconnect = usbhid_disconnect,
|
|
#ifdef CONFIG_PM
|
|
.suspend = hid_suspend,
|
|
.resume = hid_resume,
|
|
.reset_resume = hid_reset_resume,
|
|
#endif
|
|
.pre_reset = hid_pre_reset,
|
|
.post_reset = hid_post_reset,
|
|
.id_table = hid_usb_ids,
|
|
.supports_autosuspend = 1,
|
|
};
|
|
|
|
struct usb_interface *usbhid_find_interface(int minor)
|
|
{
|
|
return usb_find_interface(&hid_driver, minor);
|
|
}
|
|
|
|
static int __init hid_init(void)
|
|
{
|
|
int retval = -ENOMEM;
|
|
|
|
retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS);
|
|
if (retval)
|
|
goto usbhid_quirks_init_fail;
|
|
retval = usb_register(&hid_driver);
|
|
if (retval)
|
|
goto usb_register_fail;
|
|
pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n");
|
|
|
|
return 0;
|
|
usb_register_fail:
|
|
hid_quirks_exit(BUS_USB);
|
|
usbhid_quirks_init_fail:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit hid_exit(void)
|
|
{
|
|
usb_deregister(&hid_driver);
|
|
hid_quirks_exit(BUS_USB);
|
|
}
|
|
|
|
module_init(hid_init);
|
|
module_exit(hid_exit);
|
|
|
|
MODULE_AUTHOR("Andreas Gal");
|
|
MODULE_AUTHOR("Vojtech Pavlik");
|
|
MODULE_AUTHOR("Jiri Kosina");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|