Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB HID support for Linux |
| 3 | * |
| 4 | * Copyright (c) 1999 Andreas Gal |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 5 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| 6 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 7 | * Copyright (c) 2007-2008 Oliver Neukum |
Jiri Kosina | 7d39e84 | 2010-02-02 20:46:34 +0100 | [diff] [blame] | 8 | * Copyright (c) 2006-2010 Jiri Kosina |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 2 of the License, or (at your option) |
| 15 | * any later version. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/list.h> |
| 23 | #include <linux/mm.h> |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 24 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/spinlock.h> |
| 26 | #include <asm/unaligned.h> |
| 27 | #include <asm/byteorder.h> |
| 28 | #include <linux/input.h> |
| 29 | #include <linux/wait.h> |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 30 | #include <linux/workqueue.h> |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 31 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/usb.h> |
| 34 | |
Jiri Kosina | dde5845 | 2006-12-08 18:40:44 +0100 | [diff] [blame] | 35 | #include <linux/hid.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/hiddev.h> |
Jiri Kosina | c080d89 | 2007-01-25 11:43:31 +0100 | [diff] [blame] | 37 | #include <linux/hid-debug.h> |
Jiri Kosina | 86166b7 | 2007-05-14 09:57:40 +0200 | [diff] [blame] | 38 | #include <linux/hidraw.h> |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 39 | #include "usbhid.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * Version Information |
| 43 | */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define DRIVER_DESC "USB HID core driver" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Module parameters. |
| 49 | */ |
| 50 | |
| 51 | static unsigned int hid_mousepoll_interval; |
| 52 | module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); |
| 53 | MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); |
| 54 | |
Tobias Jakobi | 933bfe4 | 2017-02-25 20:27:27 +0100 | [diff] [blame] | 55 | static unsigned int hid_jspoll_interval; |
| 56 | module_param_named(jspoll, hid_jspoll_interval, uint, 0644); |
| 57 | MODULE_PARM_DESC(jspoll, "Polling interval of joysticks"); |
| 58 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 59 | static unsigned int ignoreled; |
| 60 | module_param_named(ignoreled, ignoreled, uint, 0644); |
| 61 | MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); |
| 62 | |
Paul Walmsley | 876b927 | 2007-04-19 14:56:12 +0200 | [diff] [blame] | 63 | /* Quirks specified at module load time */ |
Mathias Krause | 81ba992 | 2014-06-05 21:20:51 +0200 | [diff] [blame] | 64 | static char *quirks_param[MAX_USBHID_BOOT_QUIRKS]; |
Paul Walmsley | 876b927 | 2007-04-19 14:56:12 +0200 | [diff] [blame] | 65 | module_param_array_named(quirks, quirks_param, charp, NULL, 0444); |
| 66 | MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " |
| 67 | " quirks=vendorID:productID:quirks" |
| 68 | " where vendorID, productID, and quirks are all in" |
| 69 | " 0x-prefixed hex"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 71 | * Input submission and I/O error handler. |
| 72 | */ |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 73 | static void hid_io_error(struct hid_device *hid); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 74 | static int hid_submit_out(struct hid_device *hid); |
| 75 | static int hid_submit_ctrl(struct hid_device *hid); |
| 76 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 77 | |
| 78 | /* Start up the input URB */ |
| 79 | static int hid_start_in(struct hid_device *hid) |
| 80 | { |
| 81 | unsigned long flags; |
| 82 | int rc = 0; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 83 | struct usbhid_device *usbhid = hid->driver_data; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 84 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 85 | spin_lock_irqsave(&usbhid->lock, flags); |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 86 | if (test_bit(HID_IN_POLLING, &usbhid->iofl) && |
| 87 | !test_bit(HID_DISCONNECTED, &usbhid->iofl) && |
| 88 | !test_bit(HID_SUSPENDED, &usbhid->iofl) && |
| 89 | !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 90 | rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); |
Oliver Neukum | a8c52b6 | 2012-03-28 13:16:19 +0200 | [diff] [blame] | 91 | if (rc != 0) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 92 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
Oliver Neukum | a8c52b6 | 2012-03-28 13:16:19 +0200 | [diff] [blame] | 93 | if (rc == -ENOSPC) |
| 94 | set_bit(HID_NO_BANDWIDTH, &usbhid->iofl); |
| 95 | } else { |
| 96 | clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl); |
| 97 | } |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 98 | } |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 99 | spin_unlock_irqrestore(&usbhid->lock, flags); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 100 | return rc; |
| 101 | } |
| 102 | |
| 103 | /* I/O retry timer routine */ |
Kees Cook | 0ee3277 | 2017-10-04 17:53:24 -0700 | [diff] [blame] | 104 | static void hid_retry_timeout(struct timer_list *t) |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 105 | { |
Kees Cook | 0ee3277 | 2017-10-04 17:53:24 -0700 | [diff] [blame] | 106 | struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry); |
| 107 | struct hid_device *hid = usbhid->hid; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 108 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 109 | dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 110 | if (hid_start_in(hid)) |
| 111 | hid_io_error(hid); |
| 112 | } |
| 113 | |
Alan Stern | 6d8fc4d | 2006-10-18 12:35:24 -0400 | [diff] [blame] | 114 | /* Workqueue routine to reset the device or clear a halt */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 115 | static void hid_reset(struct work_struct *work) |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 116 | { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 117 | struct usbhid_device *usbhid = |
| 118 | container_of(work, struct usbhid_device, reset_work); |
| 119 | struct hid_device *hid = usbhid->hid; |
Alan Stern | 8f507ef | 2014-09-02 11:39:15 -0400 | [diff] [blame] | 120 | int rc; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 121 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 122 | if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { |
| 123 | dev_dbg(&usbhid->intf->dev, "clear halt\n"); |
Anssi Hannula | be82097 | 2007-01-19 19:28:17 +0200 | [diff] [blame] | 124 | rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 125 | clear_bit(HID_CLEAR_HALT, &usbhid->iofl); |
Alan Stern | 011b15d | 2008-11-04 11:29:27 -0500 | [diff] [blame] | 126 | if (rc == 0) { |
Alan Stern | 8f507ef | 2014-09-02 11:39:15 -0400 | [diff] [blame] | 127 | hid_start_in(hid); |
| 128 | } else { |
| 129 | dev_dbg(&usbhid->intf->dev, |
| 130 | "clear-halt failed: %d\n", rc); |
| 131 | set_bit(HID_RESET_PENDING, &usbhid->iofl); |
Alan Stern | 6d8fc4d | 2006-10-18 12:35:24 -0400 | [diff] [blame] | 132 | } |
Alan Stern | 6d8fc4d | 2006-10-18 12:35:24 -0400 | [diff] [blame] | 133 | } |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 134 | |
Alan Stern | 8f507ef | 2014-09-02 11:39:15 -0400 | [diff] [blame] | 135 | if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
| 136 | dev_dbg(&usbhid->intf->dev, "resetting device\n"); |
| 137 | usb_queue_reset_device(usbhid->intf); |
Alan Stern | df9a1f4 | 2006-06-01 13:55:28 -0400 | [diff] [blame] | 138 | } |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | /* Main I/O error handler */ |
| 142 | static void hid_io_error(struct hid_device *hid) |
| 143 | { |
| 144 | unsigned long flags; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 145 | struct usbhid_device *usbhid = hid->driver_data; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 146 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 147 | spin_lock_irqsave(&usbhid->lock, flags); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 148 | |
| 149 | /* Stop when disconnected */ |
Oliver Neukum | 69626f2 | 2008-03-31 16:27:30 +0200 | [diff] [blame] | 150 | if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 151 | goto done; |
| 152 | |
Alan Stern | 5e2a55f | 2007-03-20 19:03:31 +0100 | [diff] [blame] | 153 | /* If it has been a while since the last error, we'll assume |
| 154 | * this a brand new error and reset the retry timeout. */ |
| 155 | if (time_after(jiffies, usbhid->stop_retry + HZ/2)) |
| 156 | usbhid->retry_delay = 0; |
| 157 | |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 158 | /* When an error occurs, retry at increasing intervals */ |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 159 | if (usbhid->retry_delay == 0) { |
| 160 | usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ |
| 161 | usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); |
| 162 | } else if (usbhid->retry_delay < 100) |
| 163 | usbhid->retry_delay *= 2; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 164 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 165 | if (time_after(jiffies, usbhid->stop_retry)) { |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 166 | |
Oliver Neukum | a8c52b6 | 2012-03-28 13:16:19 +0200 | [diff] [blame] | 167 | /* Retries failed, so do a port reset unless we lack bandwidth*/ |
Don Zickus | 3af4e5a | 2015-08-10 12:06:53 -0400 | [diff] [blame] | 168 | if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl) |
Oliver Neukum | a8c52b6 | 2012-03-28 13:16:19 +0200 | [diff] [blame] | 169 | && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
| 170 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 171 | schedule_work(&usbhid->reset_work); |
Alan Stern | 6d8fc4d | 2006-10-18 12:35:24 -0400 | [diff] [blame] | 172 | goto done; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 173 | } |
| 174 | } |
| 175 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 176 | mod_timer(&usbhid->io_retry, |
| 177 | jiffies + msecs_to_jiffies(usbhid->retry_delay)); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 178 | done: |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 179 | spin_unlock_irqrestore(&usbhid->lock, flags); |
| 180 | } |
| 181 | |
| 182 | static void usbhid_mark_busy(struct usbhid_device *usbhid) |
| 183 | { |
| 184 | struct usb_interface *intf = usbhid->intf; |
| 185 | |
| 186 | usb_mark_last_busy(interface_to_usbdev(intf)); |
| 187 | } |
| 188 | |
| 189 | static int usbhid_restart_out_queue(struct usbhid_device *usbhid) |
| 190 | { |
| 191 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); |
| 192 | int kicked; |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 193 | int r; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 194 | |
Alan Stern | d4150c8 | 2012-07-19 16:08:54 -0400 | [diff] [blame] | 195 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
| 196 | test_bit(HID_SUSPENDED, &usbhid->iofl)) |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 197 | return 0; |
| 198 | |
| 199 | if ((kicked = (usbhid->outhead != usbhid->outtail))) { |
Greg Kroah-Hartman | 6cc203d | 2012-05-01 21:32:55 -0700 | [diff] [blame] | 200 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 201 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 202 | /* Try to wake up from autosuspend... */ |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 203 | r = usb_autopm_get_interface_async(usbhid->intf); |
| 204 | if (r < 0) |
| 205 | return r; |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 206 | |
| 207 | /* |
| 208 | * If still suspended, don't submit. Submission will |
| 209 | * occur if/when resume drains the queue. |
| 210 | */ |
Alan Stern | f2b5264 | 2012-07-19 16:08:45 -0400 | [diff] [blame] | 211 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 212 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
| 213 | return r; |
| 214 | } |
| 215 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 216 | /* Asynchronously flush queue. */ |
| 217 | set_bit(HID_OUT_RUNNING, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 218 | if (hid_submit_out(hid)) { |
| 219 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 220 | usb_autopm_put_interface_async(usbhid->intf); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 221 | } |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 222 | wake_up(&usbhid->wait); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 223 | } |
| 224 | return kicked; |
| 225 | } |
| 226 | |
| 227 | static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) |
| 228 | { |
| 229 | struct hid_device *hid = usb_get_intfdata(usbhid->intf); |
| 230 | int kicked; |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 231 | int r; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 232 | |
| 233 | WARN_ON(hid == NULL); |
Alan Stern | d4150c8 | 2012-07-19 16:08:54 -0400 | [diff] [blame] | 234 | if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
| 235 | test_bit(HID_SUSPENDED, &usbhid->iofl)) |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 236 | return 0; |
| 237 | |
| 238 | if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { |
Greg Kroah-Hartman | 6cc203d | 2012-05-01 21:32:55 -0700 | [diff] [blame] | 239 | hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 240 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 241 | /* Try to wake up from autosuspend... */ |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 242 | r = usb_autopm_get_interface_async(usbhid->intf); |
| 243 | if (r < 0) |
| 244 | return r; |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * If still suspended, don't submit. Submission will |
| 248 | * occur if/when resume drains the queue. |
| 249 | */ |
Alan Stern | f2b5264 | 2012-07-19 16:08:45 -0400 | [diff] [blame] | 250 | if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 251 | usb_autopm_put_interface_no_suspend(usbhid->intf); |
| 252 | return r; |
| 253 | } |
| 254 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 255 | /* Asynchronously flush queue. */ |
| 256 | set_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 257 | if (hid_submit_ctrl(hid)) { |
| 258 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 259 | usb_autopm_put_interface_async(usbhid->intf); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 260 | } |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 261 | wake_up(&usbhid->wait); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 262 | } |
| 263 | return kicked; |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | * Input interrupt completion handler. |
| 268 | */ |
| 269 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 270 | static void hid_irq_in(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
| 272 | struct hid_device *hid = urb->context; |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 273 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | int status; |
| 275 | |
| 276 | switch (urb->status) { |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 277 | case 0: /* success */ |
| 278 | usbhid->retry_delay = 0; |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 279 | if (!test_bit(HID_OPENED, &usbhid->iofl)) |
Johan Hovold | 0b750b3 | 2014-09-05 18:08:47 +0200 | [diff] [blame] | 280 | break; |
Oliver Neukum | cc8a9d7 | 2015-11-05 12:55:27 +0100 | [diff] [blame] | 281 | usbhid_mark_busy(usbhid); |
Benjamin Tissoires | b905811 | 2014-09-30 14:28:22 -0400 | [diff] [blame] | 282 | if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) { |
| 283 | hid_input_report(urb->context, HID_INPUT_REPORT, |
| 284 | urb->transfer_buffer, |
| 285 | urb->actual_length, 1); |
| 286 | /* |
| 287 | * autosuspend refused while keys are pressed |
| 288 | * because most keyboards don't wake up when |
| 289 | * a key is released |
| 290 | */ |
| 291 | if (hid_check_keys_pressed(hid)) |
| 292 | set_bit(HID_KEYS_PRESSED, &usbhid->iofl); |
| 293 | else |
| 294 | clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); |
| 295 | } |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 296 | break; |
| 297 | case -EPIPE: /* stall */ |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 298 | usbhid_mark_busy(usbhid); |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 299 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| 300 | set_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| 301 | schedule_work(&usbhid->reset_work); |
| 302 | return; |
| 303 | case -ECONNRESET: /* unlink */ |
| 304 | case -ENOENT: |
| 305 | case -ESHUTDOWN: /* unplug */ |
| 306 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| 307 | return; |
| 308 | case -EILSEQ: /* protocol error or unplug */ |
| 309 | case -EPROTO: /* protocol error or unplug */ |
| 310 | case -ETIME: /* protocol error or unplug */ |
| 311 | case -ETIMEDOUT: /* Should never happen, but... */ |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 312 | usbhid_mark_busy(usbhid); |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 313 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| 314 | hid_io_error(hid); |
| 315 | return; |
| 316 | default: /* error */ |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 317 | hid_warn(urb->dev, "input irq status %d received\n", |
| 318 | urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | |
Christoph Lameter | 54e6ecb | 2006-12-06 20:33:16 -0800 | [diff] [blame] | 321 | status = usb_submit_urb(urb, GFP_ATOMIC); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 322 | if (status) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 323 | clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 324 | if (status != -EPERM) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 325 | hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n", |
| 326 | hid_to_usb_dev(hid)->bus->bus_name, |
| 327 | hid_to_usb_dev(hid)->devpath, |
| 328 | usbhid->ifnum, status); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 329 | hid_io_error(hid); |
| 330 | } |
| 331 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | static int hid_submit_out(struct hid_device *hid) |
| 335 | { |
| 336 | struct hid_report *report; |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 337 | char *raw_report; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 338 | struct usbhid_device *usbhid = hid->driver_data; |
Oliver Neukum | 6822968 | 2010-12-22 15:33:40 +0100 | [diff] [blame] | 339 | int r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 341 | report = usbhid->out[usbhid->outtail].report; |
| 342 | raw_report = usbhid->out[usbhid->outtail].raw_report; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Mathieu Magnaudet | dabb05c6 | 2014-11-27 16:02:36 +0100 | [diff] [blame] | 344 | usbhid->urbout->transfer_buffer_length = hid_report_len(report); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 345 | usbhid->urbout->dev = hid_to_usb_dev(hid); |
Alan Stern | 668160e | 2012-07-19 16:08:21 -0400 | [diff] [blame] | 346 | if (raw_report) { |
| 347 | memcpy(usbhid->outbuf, raw_report, |
| 348 | usbhid->urbout->transfer_buffer_length); |
| 349 | kfree(raw_report); |
| 350 | usbhid->out[usbhid->outtail].raw_report = NULL; |
| 351 | } |
Oliver Neukum | 6822968 | 2010-12-22 15:33:40 +0100 | [diff] [blame] | 352 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 353 | dbg_hid("submitting out urb\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 355 | r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC); |
| 356 | if (r < 0) { |
| 357 | hid_err(hid, "usb_submit_urb(out) failed: %d\n", r); |
| 358 | return r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 360 | usbhid->last_out = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int hid_submit_ctrl(struct hid_device *hid) |
| 365 | { |
| 366 | struct hid_report *report; |
| 367 | unsigned char dir; |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 368 | char *raw_report; |
Oliver Neukum | 6822968 | 2010-12-22 15:33:40 +0100 | [diff] [blame] | 369 | int len, r; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 370 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 372 | report = usbhid->ctrl[usbhid->ctrltail].report; |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 373 | raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 374 | dir = usbhid->ctrl[usbhid->ctrltail].dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 376 | len = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
| 377 | if (dir == USB_DIR_OUT) { |
| 378 | usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); |
| 379 | usbhid->urbctrl->transfer_buffer_length = len; |
Alan Stern | 668160e | 2012-07-19 16:08:21 -0400 | [diff] [blame] | 380 | if (raw_report) { |
| 381 | memcpy(usbhid->ctrlbuf, raw_report, len); |
| 382 | kfree(raw_report); |
| 383 | usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; |
| 384 | } |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 385 | } else { |
| 386 | int maxpacket, padlen; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 387 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 388 | usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); |
| 389 | maxpacket = usb_maxpacket(hid_to_usb_dev(hid), |
| 390 | usbhid->urbctrl->pipe, 0); |
| 391 | if (maxpacket > 0) { |
| 392 | padlen = DIV_ROUND_UP(len, maxpacket); |
| 393 | padlen *= maxpacket; |
| 394 | if (padlen > usbhid->bufsize) |
| 395 | padlen = usbhid->bufsize; |
| 396 | } else |
| 397 | padlen = 0; |
| 398 | usbhid->urbctrl->transfer_buffer_length = padlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 400 | usbhid->urbctrl->dev = hid_to_usb_dev(hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 402 | usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; |
| 403 | usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : |
| 404 | HID_REQ_GET_REPORT; |
| 405 | usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | |
| 406 | report->id); |
| 407 | usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); |
| 408 | usbhid->cr->wLength = cpu_to_le16(len); |
| 409 | |
| 410 | dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", |
| 411 | usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : |
| 412 | "Get_Report", |
| 413 | usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); |
| 414 | |
| 415 | r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC); |
| 416 | if (r < 0) { |
| 417 | hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r); |
| 418 | return r; |
| 419 | } |
| 420 | usbhid->last_ctrl = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * Output interrupt completion handler. |
| 426 | */ |
| 427 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 428 | static void hid_irq_out(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
| 430 | struct hid_device *hid = urb->context; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 431 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | unsigned long flags; |
| 433 | int unplug = 0; |
| 434 | |
| 435 | switch (urb->status) { |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 436 | case 0: /* success */ |
| 437 | break; |
| 438 | case -ESHUTDOWN: /* unplug */ |
| 439 | unplug = 1; |
| 440 | case -EILSEQ: /* protocol error or unplug */ |
| 441 | case -EPROTO: /* protocol error or unplug */ |
| 442 | case -ECONNRESET: /* unlink */ |
| 443 | case -ENOENT: |
| 444 | break; |
| 445 | default: /* error */ |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 446 | hid_warn(urb->dev, "output irq status %d received\n", |
| 447 | urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 450 | spin_lock_irqsave(&usbhid->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 452 | if (unplug) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 453 | usbhid->outtail = usbhid->outhead; |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 454 | } else { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 455 | usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 457 | if (usbhid->outhead != usbhid->outtail && |
| 458 | hid_submit_out(hid) == 0) { |
| 459 | /* Successfully submitted next urb in queue */ |
| 460 | spin_unlock_irqrestore(&usbhid->lock, flags); |
| 461 | return; |
| 462 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 465 | clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 466 | spin_unlock_irqrestore(&usbhid->lock, flags); |
Oliver Neukum | 6822968 | 2010-12-22 15:33:40 +0100 | [diff] [blame] | 467 | usb_autopm_put_interface_async(usbhid->intf); |
Jiri Slaby | 1d1bdd2 | 2008-03-19 21:55:04 +0100 | [diff] [blame] | 468 | wake_up(&usbhid->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Control pipe completion handler. |
| 473 | */ |
| 474 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 475 | static void hid_ctrl(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | { |
| 477 | struct hid_device *hid = urb->context; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 478 | struct usbhid_device *usbhid = hid->driver_data; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 479 | int unplug = 0, status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 481 | switch (status) { |
Jiri Slaby | 880d29f | 2008-06-18 23:55:41 +0200 | [diff] [blame] | 482 | case 0: /* success */ |
| 483 | if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN) |
| 484 | hid_input_report(urb->context, |
| 485 | usbhid->ctrl[usbhid->ctrltail].report->type, |
| 486 | urb->transfer_buffer, urb->actual_length, 0); |
| 487 | break; |
| 488 | case -ESHUTDOWN: /* unplug */ |
| 489 | unplug = 1; |
| 490 | case -EILSEQ: /* protocol error or unplug */ |
| 491 | case -EPROTO: /* protocol error or unplug */ |
| 492 | case -ECONNRESET: /* unlink */ |
| 493 | case -ENOENT: |
| 494 | case -EPIPE: /* report not available */ |
| 495 | break; |
| 496 | default: /* error */ |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 497 | hid_warn(urb->dev, "ctrl urb status %d received\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Ioan-Adrian Ratiu | e470127 | 2015-11-20 22:19:02 +0200 | [diff] [blame] | 500 | spin_lock(&usbhid->lock); |
| 501 | |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 502 | if (unplug) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 503 | usbhid->ctrltail = usbhid->ctrlhead; |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 504 | } else { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 505 | usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Alan Stern | 93101af | 2012-07-19 16:08:39 -0400 | [diff] [blame] | 507 | if (usbhid->ctrlhead != usbhid->ctrltail && |
| 508 | hid_submit_ctrl(hid) == 0) { |
| 509 | /* Successfully submitted next urb in queue */ |
| 510 | spin_unlock(&usbhid->lock); |
| 511 | return; |
| 512 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 515 | clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 516 | spin_unlock(&usbhid->lock); |
Oliver Neukum | 6822968 | 2010-12-22 15:33:40 +0100 | [diff] [blame] | 517 | usb_autopm_put_interface_async(usbhid->intf); |
Jiri Slaby | 1d1bdd2 | 2008-03-19 21:55:04 +0100 | [diff] [blame] | 518 | wake_up(&usbhid->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | |
H Hartley Sweeten | 52cfc61b | 2009-08-17 15:37:18 -0700 | [diff] [blame] | 521 | static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, |
| 522 | unsigned char dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | { |
| 524 | int head; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 525 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Reyad Attiyat | 46df9deda | 2014-07-25 00:13:01 -0500 | [diff] [blame] | 527 | if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) || |
| 528 | test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return; |
| 530 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 531 | if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 532 | if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 533 | hid_warn(hid, "output queue full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | return; |
| 535 | } |
| 536 | |
Jiri Kosina | 27ce405 | 2013-07-10 19:56:27 +0200 | [diff] [blame] | 537 | usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 538 | if (!usbhid->out[usbhid->outhead].raw_report) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 539 | hid_warn(hid, "output queueing failed\n"); |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 540 | return; |
| 541 | } |
| 542 | hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); |
| 543 | usbhid->out[usbhid->outhead].report = report; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 544 | usbhid->outhead = head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 546 | /* If the queue isn't running, restart it */ |
| 547 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) { |
| 548 | usbhid_restart_out_queue(usbhid); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 549 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 550 | /* Otherwise see if an earlier request has timed out */ |
| 551 | } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) { |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 552 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 553 | /* Prevent autosuspend following the unlink */ |
| 554 | usb_autopm_get_interface_no_resume(usbhid->intf); |
| 555 | |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 556 | /* |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 557 | * Prevent resubmission in case the URB completes |
| 558 | * before we can unlink it. We don't want to cancel |
| 559 | * the wrong transfer! |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 560 | */ |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 561 | usb_block_urb(usbhid->urbout); |
Oliver Neukum | 8815bb0 | 2012-04-30 09:13:46 +0200 | [diff] [blame] | 562 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 563 | /* Drop lock to avoid deadlock if the callback runs */ |
| 564 | spin_unlock(&usbhid->lock); |
Oliver Neukum | 8815bb0 | 2012-04-30 09:13:46 +0200 | [diff] [blame] | 565 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 566 | usb_unlink_urb(usbhid->urbout); |
| 567 | spin_lock(&usbhid->lock); |
| 568 | usb_unblock_urb(usbhid->urbout); |
| 569 | |
| 570 | /* Unlink might have stopped the queue */ |
| 571 | if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| 572 | usbhid_restart_out_queue(usbhid); |
| 573 | |
| 574 | /* Now we can allow autosuspend again */ |
| 575 | usb_autopm_put_interface_async(usbhid->intf); |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 576 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | return; |
| 578 | } |
| 579 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 580 | if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 581 | hid_warn(hid, "control queue full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return; |
| 583 | } |
| 584 | |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 585 | if (dir == USB_DIR_OUT) { |
Jiri Kosina | 27ce405 | 2013-07-10 19:56:27 +0200 | [diff] [blame] | 586 | usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 587 | if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 588 | hid_warn(hid, "control queueing failed\n"); |
Anssi Hannula | f129ea6 | 2008-10-04 14:44:06 +0200 | [diff] [blame] | 589 | return; |
| 590 | } |
| 591 | hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); |
| 592 | } |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 593 | usbhid->ctrl[usbhid->ctrlhead].report = report; |
| 594 | usbhid->ctrl[usbhid->ctrlhead].dir = dir; |
| 595 | usbhid->ctrlhead = head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 597 | /* If the queue isn't running, restart it */ |
| 598 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { |
| 599 | usbhid_restart_ctrl_queue(usbhid); |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 600 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 601 | /* Otherwise see if an earlier request has timed out */ |
| 602 | } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) { |
Daniel Kurtz | f0befcd | 2011-11-17 19:23:49 +0800 | [diff] [blame] | 603 | |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 604 | /* Prevent autosuspend following the unlink */ |
| 605 | usb_autopm_get_interface_no_resume(usbhid->intf); |
| 606 | |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 607 | /* |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 608 | * Prevent resubmission in case the URB completes |
| 609 | * before we can unlink it. We don't want to cancel |
| 610 | * the wrong transfer! |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 611 | */ |
Alan Stern | 01a7c98 | 2012-07-19 16:08:31 -0400 | [diff] [blame] | 612 | usb_block_urb(usbhid->urbctrl); |
| 613 | |
| 614 | /* Drop lock to avoid deadlock if the callback runs */ |
| 615 | spin_unlock(&usbhid->lock); |
| 616 | |
| 617 | usb_unlink_urb(usbhid->urbctrl); |
| 618 | spin_lock(&usbhid->lock); |
| 619 | usb_unblock_urb(usbhid->urbctrl); |
| 620 | |
| 621 | /* Unlink might have stopped the queue */ |
| 622 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| 623 | usbhid_restart_ctrl_queue(usbhid); |
| 624 | |
| 625 | /* Now we can allow autosuspend again */ |
| 626 | usb_autopm_put_interface_async(usbhid->intf); |
Oliver Neukum | 858155f | 2010-02-12 13:02:28 +0100 | [diff] [blame] | 627 | } |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
Benjamin Tissoires | d8814272 | 2013-02-25 11:31:46 +0100 | [diff] [blame] | 630 | static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 631 | { |
| 632 | struct usbhid_device *usbhid = hid->driver_data; |
| 633 | unsigned long flags; |
| 634 | |
| 635 | spin_lock_irqsave(&usbhid->lock, flags); |
| 636 | __usbhid_submit_report(hid, report, dir); |
| 637 | spin_unlock_irqrestore(&usbhid->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | } |
| 639 | |
Benjamin Tissoires | b7966a4 | 2013-02-25 11:31:47 +0100 | [diff] [blame] | 640 | static int usbhid_wait_io(struct hid_device *hid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 642 | struct usbhid_device *usbhid = hid->driver_data; |
| 643 | |
Jiri Slaby | 1d1bdd2 | 2008-03-19 21:55:04 +0100 | [diff] [blame] | 644 | if (!wait_event_timeout(usbhid->wait, |
| 645 | (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && |
| 646 | !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | 10*HZ)) { |
Jiri Kosina | 58037eb | 2007-05-30 15:07:13 +0200 | [diff] [blame] | 648 | dbg_hid("timeout waiting for ctrl or out queue to clear\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | return -1; |
| 650 | } |
| 651 | |
| 652 | return 0; |
| 653 | } |
| 654 | |
Vojtech Pavlik | 854561b | 2005-05-29 02:28:00 -0500 | [diff] [blame] | 655 | static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) |
| 656 | { |
Vojtech Pavlik | 71387bd | 2005-05-29 02:28:14 -0500 | [diff] [blame] | 657 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
Vojtech Pavlik | 854561b | 2005-05-29 02:28:00 -0500 | [diff] [blame] | 658 | HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, |
| 659 | ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); |
| 660 | } |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, |
| 663 | unsigned char type, void *buf, int size) |
| 664 | { |
| 665 | int result, retries = 4; |
| 666 | |
Jiri Kosina | 43c7bf0 | 2007-01-26 12:58:24 +0100 | [diff] [blame] | 667 | memset(buf, 0, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
| 669 | do { |
| 670 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| 671 | USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, |
| 672 | (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); |
| 673 | retries--; |
| 674 | } while (result < size && retries); |
| 675 | return result; |
| 676 | } |
| 677 | |
Dmitry Torokhov | d36b7d4 | 2017-06-06 23:59:31 -0700 | [diff] [blame] | 678 | static int usbhid_open(struct hid_device *hid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Oliver Neukum | 933e318 | 2007-07-11 14:48:58 +0200 | [diff] [blame] | 680 | struct usbhid_device *usbhid = hid->driver_data; |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 681 | int res; |
Oliver Neukum | 933e318 | 2007-07-11 14:48:58 +0200 | [diff] [blame] | 682 | |
Dmitry Torokhov | cf60177 | 2017-07-12 17:14:24 -0700 | [diff] [blame] | 683 | set_bit(HID_OPENED, &usbhid->iofl); |
| 684 | |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 685 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) |
| 686 | return 0; |
Benjamin Tissoires | b905811 | 2014-09-30 14:28:22 -0400 | [diff] [blame] | 687 | |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 688 | res = usb_autopm_get_interface(usbhid->intf); |
| 689 | /* the device must be awake to reliably request remote wakeup */ |
Dmitry Torokhov | cf60177 | 2017-07-12 17:14:24 -0700 | [diff] [blame] | 690 | if (res < 0) { |
| 691 | clear_bit(HID_OPENED, &usbhid->iofl); |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 692 | return -EIO; |
Dmitry Torokhov | cf60177 | 2017-07-12 17:14:24 -0700 | [diff] [blame] | 693 | } |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 694 | |
| 695 | usbhid->intf->needs_remote_wakeup = 1; |
| 696 | |
| 697 | set_bit(HID_RESUME_RUNNING, &usbhid->iofl); |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 698 | set_bit(HID_IN_POLLING, &usbhid->iofl); |
| 699 | |
| 700 | res = hid_start_in(hid); |
| 701 | if (res) { |
| 702 | if (res != -ENOSPC) { |
| 703 | hid_io_error(hid); |
| 704 | res = 0; |
| 705 | } else { |
| 706 | /* no use opening if resources are insufficient */ |
| 707 | res = -EBUSY; |
| 708 | clear_bit(HID_OPENED, &usbhid->iofl); |
| 709 | clear_bit(HID_IN_POLLING, &usbhid->iofl); |
| 710 | usbhid->intf->needs_remote_wakeup = 0; |
| 711 | } |
Oliver Neukum | 933e318 | 2007-07-11 14:48:58 +0200 | [diff] [blame] | 712 | } |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 713 | |
| 714 | usb_autopm_put_interface(usbhid->intf); |
| 715 | |
| 716 | /* |
| 717 | * In case events are generated while nobody was listening, |
| 718 | * some are released when the device is re-opened. |
| 719 | * Wait 50 msec for the queue to empty before allowing events |
| 720 | * to go through hid. |
| 721 | */ |
| 722 | if (res == 0) |
| 723 | msleep(50); |
| 724 | |
| 725 | clear_bit(HID_RESUME_RUNNING, &usbhid->iofl); |
Oliver Neukum | a8c52b6 | 2012-03-28 13:16:19 +0200 | [diff] [blame] | 726 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | } |
| 728 | |
Dmitry Torokhov | d36b7d4 | 2017-06-06 23:59:31 -0700 | [diff] [blame] | 729 | static void usbhid_close(struct hid_device *hid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 731 | struct usbhid_device *usbhid = hid->driver_data; |
| 732 | |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 733 | /* |
| 734 | * Make sure we don't restart data acquisition due to |
| 735 | * a resumption we no longer care about by avoiding racing |
| 736 | * with hid_start_in(). |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 737 | */ |
| 738 | spin_lock_irq(&usbhid->lock); |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 739 | clear_bit(HID_OPENED, &usbhid->iofl); |
Dmitry Torokhov | cf60177 | 2017-07-12 17:14:24 -0700 | [diff] [blame] | 740 | if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) |
| 741 | clear_bit(HID_IN_POLLING, &usbhid->iofl); |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 742 | spin_unlock_irq(&usbhid->lock); |
| 743 | |
Dmitry Torokhov | cf60177 | 2017-07-12 17:14:24 -0700 | [diff] [blame] | 744 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) |
| 745 | return; |
| 746 | |
Dmitry Torokhov | e399396 | 2017-06-06 23:59:36 -0700 | [diff] [blame] | 747 | hid_cancel_delayed_stuff(usbhid); |
| 748 | usb_kill_urb(usbhid->urbin); |
| 749 | usbhid->intf->needs_remote_wakeup = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | /* |
| 753 | * Initialize all reports |
| 754 | */ |
| 755 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 756 | void usbhid_init_reports(struct hid_device *hid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | { |
| 758 | struct hid_report *report; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 759 | struct usbhid_device *usbhid = hid->driver_data; |
Benjamin Tissoires | 595e927 | 2013-08-22 14:51:09 +0200 | [diff] [blame] | 760 | struct hid_report_enum *report_enum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | int err, ret; |
| 762 | |
Benjamin Tissoires | 9143059 | 2017-03-08 15:11:14 +0100 | [diff] [blame] | 763 | report_enum = &hid->report_enum[HID_INPUT_REPORT]; |
| 764 | list_for_each_entry(report, &report_enum->report_list, list) |
| 765 | usbhid_submit_report(hid, report, USB_DIR_IN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Benjamin Tissoires | 595e927 | 2013-08-22 14:51:09 +0200 | [diff] [blame] | 767 | report_enum = &hid->report_enum[HID_FEATURE_REPORT]; |
| 768 | list_for_each_entry(report, &report_enum->report_list, list) |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 769 | usbhid_submit_report(hid, report, USB_DIR_IN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | err = 0; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 772 | ret = usbhid_wait_io(hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | while (ret) { |
| 774 | err |= ret; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 775 | if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| 776 | usb_kill_urb(usbhid->urbctrl); |
| 777 | if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| 778 | usb_kill_urb(usbhid->urbout); |
| 779 | ret = usbhid_wait_io(hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | if (err) |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 783 | hid_warn(hid, "timeout initializing reports\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 786 | /* |
Pete Zaitcev | 713c8aa | 2007-04-06 14:33:18 +0200 | [diff] [blame] | 787 | * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). |
| 788 | */ |
| 789 | static int hid_find_field_early(struct hid_device *hid, unsigned int page, |
| 790 | unsigned int hid_code, struct hid_field **pfield) |
| 791 | { |
| 792 | struct hid_report *report; |
| 793 | struct hid_field *field; |
| 794 | struct hid_usage *usage; |
| 795 | int i, j; |
| 796 | |
| 797 | list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { |
| 798 | for (i = 0; i < report->maxfield; i++) { |
| 799 | field = report->field[i]; |
| 800 | for (j = 0; j < field->maxusage; j++) { |
| 801 | usage = &field->usage[j]; |
| 802 | if ((usage->hid & HID_USAGE_PAGE) == page && |
| 803 | (usage->hid & 0xFFFF) == hid_code) { |
| 804 | *pfield = field; |
| 805 | return j; |
| 806 | } |
| 807 | } |
| 808 | } |
| 809 | } |
| 810 | return -1; |
| 811 | } |
| 812 | |
David Herrmann | ddf64a3 | 2013-07-15 19:10:10 +0200 | [diff] [blame] | 813 | static void usbhid_set_leds(struct hid_device *hid) |
Pete Zaitcev | 713c8aa | 2007-04-06 14:33:18 +0200 | [diff] [blame] | 814 | { |
| 815 | struct hid_field *field; |
| 816 | int offset; |
| 817 | |
| 818 | if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { |
| 819 | hid_set_field(field, offset, 0); |
| 820 | usbhid_submit_report(hid, field->report, USB_DIR_OUT); |
| 821 | } |
| 822 | } |
| 823 | |
| 824 | /* |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 825 | * Traverse the supplied list of reports and find the longest |
| 826 | */ |
Jiri Slaby | 282bfd4 | 2008-03-28 17:06:41 +0100 | [diff] [blame] | 827 | static void hid_find_max_report(struct hid_device *hid, unsigned int type, |
| 828 | unsigned int *max) |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 829 | { |
| 830 | struct hid_report *report; |
Jiri Slaby | 282bfd4 | 2008-03-28 17:06:41 +0100 | [diff] [blame] | 831 | unsigned int size; |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 832 | |
| 833 | list_for_each_entry(report, &hid->report_enum[type].report_list, list) { |
Jiri Kosina | efc7ce1 | 2008-10-17 15:01:15 +0200 | [diff] [blame] | 834 | size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 835 | if (*max < size) |
| 836 | *max = size; |
| 837 | } |
| 838 | } |
| 839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) |
| 841 | { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 842 | struct usbhid_device *usbhid = hid->driver_data; |
| 843 | |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 844 | usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
Jiri Slaby | 898089d | 2008-11-24 16:20:06 +0100 | [diff] [blame] | 845 | &usbhid->inbuf_dma); |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 846 | usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
Jiri Slaby | 898089d | 2008-11-24 16:20:06 +0100 | [diff] [blame] | 847 | &usbhid->outbuf_dma); |
Alan Stern | 0ede76f | 2010-03-05 15:10:17 -0500 | [diff] [blame] | 848 | usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 849 | usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
Jiri Slaby | 898089d | 2008-11-24 16:20:06 +0100 | [diff] [blame] | 850 | &usbhid->ctrlbuf_dma); |
| 851 | if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || |
| 852 | !usbhid->ctrlbuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | return -1; |
| 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
Alan Ott | b4dbde9 | 2011-01-18 03:04:39 -0500 | [diff] [blame] | 858 | static int usbhid_get_raw_report(struct hid_device *hid, |
| 859 | unsigned char report_number, __u8 *buf, size_t count, |
| 860 | unsigned char report_type) |
| 861 | { |
| 862 | struct usbhid_device *usbhid = hid->driver_data; |
| 863 | struct usb_device *dev = hid_to_usb_dev(hid); |
| 864 | struct usb_interface *intf = usbhid->intf; |
| 865 | struct usb_host_interface *interface = intf->cur_altsetting; |
| 866 | int skipped_report_id = 0; |
| 867 | int ret; |
| 868 | |
| 869 | /* Byte 0 is the report number. Report data starts at byte 1.*/ |
| 870 | buf[0] = report_number; |
| 871 | if (report_number == 0x0) { |
| 872 | /* Offset the return buffer by 1, so that the report ID |
| 873 | will remain in byte 0. */ |
| 874 | buf++; |
| 875 | count--; |
| 876 | skipped_report_id = 1; |
| 877 | } |
| 878 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| 879 | HID_REQ_GET_REPORT, |
| 880 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 881 | ((report_type + 1) << 8) | report_number, |
| 882 | interface->desc.bInterfaceNumber, buf, count, |
| 883 | USB_CTRL_SET_TIMEOUT); |
| 884 | |
| 885 | /* count also the report id */ |
| 886 | if (ret > 0 && skipped_report_id) |
| 887 | ret++; |
| 888 | |
| 889 | return ret; |
| 890 | } |
| 891 | |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 892 | static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum, |
| 893 | __u8 *buf, size_t count, unsigned char rtype) |
| 894 | { |
| 895 | struct usbhid_device *usbhid = hid->driver_data; |
| 896 | struct usb_device *dev = hid_to_usb_dev(hid); |
| 897 | struct usb_interface *intf = usbhid->intf; |
| 898 | struct usb_host_interface *interface = intf->cur_altsetting; |
| 899 | int ret, skipped_report_id = 0; |
| 900 | |
| 901 | /* Byte 0 is the report number. Report data starts at byte 1.*/ |
Benjamin Tissoires | e534a93 | 2014-03-08 22:52:42 -0500 | [diff] [blame] | 902 | if ((rtype == HID_OUTPUT_REPORT) && |
| 903 | (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID)) |
| 904 | buf[0] = 0; |
| 905 | else |
| 906 | buf[0] = reportnum; |
| 907 | |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 908 | if (buf[0] == 0x0) { |
| 909 | /* Don't send the Report ID */ |
| 910 | buf++; |
| 911 | count--; |
| 912 | skipped_report_id = 1; |
| 913 | } |
| 914 | |
| 915 | ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| 916 | HID_REQ_SET_REPORT, |
| 917 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 918 | ((rtype + 1) << 8) | reportnum, |
| 919 | interface->desc.bInterfaceNumber, buf, count, |
| 920 | USB_CTRL_SET_TIMEOUT); |
| 921 | /* count also the report id, if this was a numbered report. */ |
| 922 | if (ret > 0 && skipped_report_id) |
| 923 | ret++; |
| 924 | |
| 925 | return ret; |
| 926 | } |
| 927 | |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 928 | static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count) |
| 929 | { |
| 930 | struct usbhid_device *usbhid = hid->driver_data; |
| 931 | struct usb_device *dev = hid_to_usb_dev(hid); |
| 932 | int actual_length, skipped_report_id = 0, ret; |
| 933 | |
| 934 | if (!usbhid->urbout) |
Benjamin Tissoires | ddea1af | 2014-02-10 12:58:51 -0500 | [diff] [blame] | 935 | return -ENOSYS; |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 936 | |
| 937 | if (buf[0] == 0x0) { |
| 938 | /* Don't send the Report ID */ |
| 939 | buf++; |
| 940 | count--; |
| 941 | skipped_report_id = 1; |
| 942 | } |
| 943 | |
| 944 | ret = usb_interrupt_msg(dev, usbhid->urbout->pipe, |
| 945 | buf, count, &actual_length, |
| 946 | USB_CTRL_SET_TIMEOUT); |
| 947 | /* return the number of bytes transferred */ |
| 948 | if (ret == 0) { |
| 949 | ret = actual_length; |
| 950 | /* count also the report id */ |
| 951 | if (skipped_report_id) |
| 952 | ret++; |
| 953 | } |
| 954 | |
| 955 | return ret; |
| 956 | } |
| 957 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) |
| 959 | { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 960 | struct usbhid_device *usbhid = hid->driver_data; |
| 961 | |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 962 | usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); |
| 963 | usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); |
Alan Stern | 0ede76f | 2010-03-05 15:10:17 -0500 | [diff] [blame] | 964 | kfree(usbhid->cr); |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 965 | usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
| 967 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 968 | static int usbhid_parse(struct hid_device *hid) |
| 969 | { |
| 970 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | struct usb_host_interface *interface = intf->cur_altsetting; |
| 972 | struct usb_device *dev = interface_to_usbdev (intf); |
| 973 | struct hid_descriptor *hdesc; |
Paul Walmsley | 2eb5dc3 | 2007-04-19 13:27:04 +0200 | [diff] [blame] | 974 | u32 quirks = 0; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 975 | unsigned int rsize = 0; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 976 | char *rdesc; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 977 | int ret, n; |
Jaejoong Kim | f043bfc | 2017-09-28 19:16:30 +0900 | [diff] [blame] | 978 | int num_descriptors; |
| 979 | size_t offset = offsetof(struct hid_descriptor, desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
Benjamin Tissoires | d5d3e20 | 2017-11-20 11:48:41 +0100 | [diff] [blame] | 981 | quirks = hid_lookup_quirk(hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
Jiri Kosina | 6f4303f | 2009-01-29 00:15:51 +0100 | [diff] [blame] | 983 | if (quirks & HID_QUIRK_IGNORE) |
| 984 | return -ENODEV; |
| 985 | |
Alan Stern | 0f28b55 | 2006-05-15 14:49:04 -0400 | [diff] [blame] | 986 | /* Many keyboards and mice don't like to be polled for reports, |
| 987 | * so we will always set the HID_QUIRK_NOGET flag for them. */ |
| 988 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { |
| 989 | if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || |
| 990 | interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) |
| 991 | quirks |= HID_QUIRK_NOGET; |
| 992 | } |
| 993 | |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 994 | if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && |
| 995 | (!interface->desc.bNumEndpoints || |
| 996 | usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { |
Jiri Kosina | 58037eb | 2007-05-30 15:07:13 +0200 | [diff] [blame] | 997 | dbg_hid("class descriptor not present\n"); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 998 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | |
Jaejoong Kim | f043bfc | 2017-09-28 19:16:30 +0900 | [diff] [blame] | 1001 | if (hdesc->bLength < sizeof(struct hid_descriptor)) { |
| 1002 | dbg_hid("hid descriptor is too short\n"); |
| 1003 | return -EINVAL; |
| 1004 | } |
| 1005 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1006 | hid->version = le16_to_cpu(hdesc->bcdHID); |
| 1007 | hid->country = hdesc->bCountryCode; |
| 1008 | |
Jaejoong Kim | f043bfc | 2017-09-28 19:16:30 +0900 | [diff] [blame] | 1009 | num_descriptors = min_t(int, hdesc->bNumDescriptors, |
| 1010 | (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor)); |
| 1011 | |
| 1012 | for (n = 0; n < num_descriptors; n++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) |
| 1014 | rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); |
| 1015 | |
| 1016 | if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { |
Jiri Kosina | 58037eb | 2007-05-30 15:07:13 +0200 | [diff] [blame] | 1017 | dbg_hid("weird size of report descriptor (%u)\n", rsize); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1018 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | } |
| 1020 | |
Joe Perches | 52150c7 | 2017-03-01 17:35:07 -0800 | [diff] [blame] | 1021 | rdesc = kmalloc(rsize, GFP_KERNEL); |
| 1022 | if (!rdesc) |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1023 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Vojtech Pavlik | 854561b | 2005-05-29 02:28:00 -0500 | [diff] [blame] | 1025 | hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); |
| 1026 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1027 | ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, |
| 1028 | HID_DT_REPORT, rdesc, rsize); |
| 1029 | if (ret < 0) { |
Jiri Kosina | 58037eb | 2007-05-30 15:07:13 +0200 | [diff] [blame] | 1030 | dbg_hid("reading report descriptor failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | kfree(rdesc); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1032 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | } |
| 1034 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1035 | ret = hid_parse_report(hid, rdesc, rsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | kfree(rdesc); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1037 | if (ret) { |
| 1038 | dbg_hid("parsing report descriptor failed\n"); |
| 1039 | goto err; |
| 1040 | } |
| 1041 | |
Zoltan Karcagi | f520899 | 2009-05-06 16:30:21 +0200 | [diff] [blame] | 1042 | hid->quirks |= quirks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1044 | return 0; |
| 1045 | err: |
| 1046 | return ret; |
| 1047 | } |
| 1048 | |
| 1049 | static int usbhid_start(struct hid_device *hid) |
| 1050 | { |
| 1051 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
| 1052 | struct usb_host_interface *interface = intf->cur_altsetting; |
| 1053 | struct usb_device *dev = interface_to_usbdev(intf); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1054 | struct usbhid_device *usbhid = hid->driver_data; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1055 | unsigned int n, insize = 0; |
| 1056 | int ret; |
| 1057 | |
Jiri Slaby | e3e14de | 2008-11-01 23:41:46 +0100 | [diff] [blame] | 1058 | clear_bit(HID_DISCONNECTED, &usbhid->iofl); |
| 1059 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1060 | usbhid->bufsize = HID_MIN_BUFFER_SIZE; |
| 1061 | hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); |
| 1062 | hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); |
| 1063 | hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); |
| 1064 | |
| 1065 | if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) |
| 1066 | usbhid->bufsize = HID_MAX_BUFFER_SIZE; |
Michael Haboustak | bf0964d | 2005-09-05 00:12:01 -0500 | [diff] [blame] | 1067 | |
| 1068 | hid_find_max_report(hid, HID_INPUT_REPORT, &insize); |
| 1069 | |
| 1070 | if (insize > HID_MAX_BUFFER_SIZE) |
| 1071 | insize = HID_MAX_BUFFER_SIZE; |
| 1072 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1073 | if (hid_alloc_buffers(dev, hid)) { |
| 1074 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | goto fail; |
Pekka Sarnila | f345c37 | 2008-03-06 13:23:14 +0100 | [diff] [blame] | 1076 | } |
| 1077 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | for (n = 0; n < interface->desc.bNumEndpoints; n++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | struct usb_endpoint_descriptor *endpoint; |
| 1080 | int pipe; |
| 1081 | int interval; |
| 1082 | |
| 1083 | endpoint = &interface->endpoint[n].desc; |
Jiri Slaby | 581a273 | 2008-11-24 16:20:08 +0100 | [diff] [blame] | 1084 | if (!usb_endpoint_xfer_int(endpoint)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | continue; |
| 1086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | interval = endpoint->bInterval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
Pekka Sarnila | f345c37 | 2008-03-06 13:23:14 +0100 | [diff] [blame] | 1089 | /* Some vendors give fullspeed interval on highspeed devides */ |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1090 | if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && |
Pekka Sarnila | f345c37 | 2008-03-06 13:23:14 +0100 | [diff] [blame] | 1091 | dev->speed == USB_SPEED_HIGH) { |
| 1092 | interval = fls(endpoint->bInterval*8); |
Joe Perches | 52150c7 | 2017-03-01 17:35:07 -0800 | [diff] [blame] | 1093 | pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n", |
| 1094 | hid->name, endpoint->bInterval, interval); |
Pekka Sarnila | f345c37 | 2008-03-06 13:23:14 +0100 | [diff] [blame] | 1095 | } |
| 1096 | |
Tobias Jakobi | 933bfe4 | 2017-02-25 20:27:27 +0100 | [diff] [blame] | 1097 | /* Change the polling interval of mice and joysticks. */ |
| 1098 | switch (hid->collection->usage) { |
| 1099 | case HID_GD_MOUSE: |
| 1100 | if (hid_mousepoll_interval > 0) |
| 1101 | interval = hid_mousepoll_interval; |
| 1102 | break; |
| 1103 | case HID_GD_JOYSTICK: |
| 1104 | if (hid_jspoll_interval > 0) |
| 1105 | interval = hid_jspoll_interval; |
| 1106 | break; |
| 1107 | } |
Dmitry Torokhov | 05f091ab | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 1108 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1109 | ret = -ENOMEM; |
Luiz Fernando N. Capitulino | 0f12aa0 | 2006-10-26 13:02:51 -0300 | [diff] [blame] | 1110 | if (usb_endpoint_dir_in(endpoint)) { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1111 | if (usbhid->urbin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | continue; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1113 | if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | goto fail; |
| 1115 | pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1116 | usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | hid_irq_in, hid, interval); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1118 | usbhid->urbin->transfer_dma = usbhid->inbuf_dma; |
| 1119 | usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } else { |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1121 | if (usbhid->urbout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | continue; |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1123 | if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | goto fail; |
| 1125 | pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1126 | usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | hid_irq_out, hid, interval); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1128 | usbhid->urbout->transfer_dma = usbhid->outbuf_dma; |
| 1129 | usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | } |
| 1131 | } |
| 1132 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1133 | usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1134 | if (!usbhid->urbctrl) { |
| 1135 | ret = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | goto fail; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1137 | } |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 1138 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1139 | usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, |
| 1140 | usbhid->ctrlbuf, 1, hid_ctrl, hid); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1141 | usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; |
Alan Stern | 0ede76f | 2010-03-05 15:10:17 -0500 | [diff] [blame] | 1142 | usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1143 | |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1144 | set_bit(HID_STARTED, &usbhid->iofl); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1145 | |
Johan Hovold | 0b750b3 | 2014-09-05 18:08:47 +0200 | [diff] [blame] | 1146 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
| 1147 | ret = usb_autopm_get_interface(usbhid->intf); |
| 1148 | if (ret) |
| 1149 | goto fail; |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 1150 | set_bit(HID_IN_POLLING, &usbhid->iofl); |
Johan Hovold | 0b750b3 | 2014-09-05 18:08:47 +0200 | [diff] [blame] | 1151 | usbhid->intf->needs_remote_wakeup = 1; |
| 1152 | ret = hid_start_in(hid); |
| 1153 | if (ret) { |
| 1154 | dev_err(&hid->dev, |
| 1155 | "failed to start in urb: %d\n", ret); |
| 1156 | } |
| 1157 | usb_autopm_put_interface(usbhid->intf); |
| 1158 | } |
| 1159 | |
Alan Stern | 08ef08e | 2008-10-30 23:58:51 +0100 | [diff] [blame] | 1160 | /* Some keyboards don't work until their LEDs have been set. |
| 1161 | * Since BIOSes do set the LEDs, it must be safe for any device |
| 1162 | * that supports the keyboard boot protocol. |
Alan Stern | 3d61510 | 2010-04-02 13:21:58 -0400 | [diff] [blame] | 1163 | * In addition, enable remote wakeup by default for all keyboard |
| 1164 | * devices supporting the boot protocol. |
Alan Stern | 08ef08e | 2008-10-30 23:58:51 +0100 | [diff] [blame] | 1165 | */ |
| 1166 | if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && |
| 1167 | interface->desc.bInterfaceProtocol == |
Alan Stern | 3d61510 | 2010-04-02 13:21:58 -0400 | [diff] [blame] | 1168 | USB_INTERFACE_PROTOCOL_KEYBOARD) { |
Alan Stern | 08ef08e | 2008-10-30 23:58:51 +0100 | [diff] [blame] | 1169 | usbhid_set_leds(hid); |
Alan Stern | 3d61510 | 2010-04-02 13:21:58 -0400 | [diff] [blame] | 1170 | device_set_wakeup_enable(&dev->dev, 1); |
| 1171 | } |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1172 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
| 1174 | fail: |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1175 | usb_free_urb(usbhid->urbin); |
| 1176 | usb_free_urb(usbhid->urbout); |
| 1177 | usb_free_urb(usbhid->urbctrl); |
Jiri Slaby | e3e14de | 2008-11-01 23:41:46 +0100 | [diff] [blame] | 1178 | usbhid->urbin = NULL; |
| 1179 | usbhid->urbout = NULL; |
| 1180 | usbhid->urbctrl = NULL; |
Jiri Kosina | 22f675f | 2007-08-01 12:32:27 +0200 | [diff] [blame] | 1181 | hid_free_buffers(dev, hid); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1182 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | } |
| 1184 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1185 | static void usbhid_stop(struct hid_device *hid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | { |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1187 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1189 | if (WARN_ON(!usbhid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | return; |
| 1191 | |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 1192 | if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
| 1193 | clear_bit(HID_IN_POLLING, &usbhid->iofl); |
Johan Hovold | 0b750b3 | 2014-09-05 18:08:47 +0200 | [diff] [blame] | 1194 | usbhid->intf->needs_remote_wakeup = 0; |
Dmitry Torokhov | 28cbc86 | 2017-06-06 23:59:33 -0700 | [diff] [blame] | 1195 | } |
Johan Hovold | 0b750b3 | 2014-09-05 18:08:47 +0200 | [diff] [blame] | 1196 | |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1197 | clear_bit(HID_STARTED, &usbhid->iofl); |
Daniel Kurtz | 4371ea8 | 2011-11-17 19:23:50 +0800 | [diff] [blame] | 1198 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
Oliver Neukum | 69626f2 | 2008-03-31 16:27:30 +0200 | [diff] [blame] | 1199 | set_bit(HID_DISCONNECTED, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1200 | spin_unlock_irq(&usbhid->lock); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1201 | usb_kill_urb(usbhid->urbin); |
| 1202 | usb_kill_urb(usbhid->urbout); |
| 1203 | usb_kill_urb(usbhid->urbctrl); |
| 1204 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1205 | hid_cancel_delayed_stuff(usbhid); |
Alan Stern | aef4e26 | 2006-01-31 12:58:38 -0500 | [diff] [blame] | 1206 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1207 | hid->claimed = 0; |
| 1208 | |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1209 | usb_free_urb(usbhid->urbin); |
| 1210 | usb_free_urb(usbhid->urbctrl); |
| 1211 | usb_free_urb(usbhid->urbout); |
Jiri Slaby | e3e14de | 2008-11-01 23:41:46 +0100 | [diff] [blame] | 1212 | usbhid->urbin = NULL; /* don't mess up next start */ |
| 1213 | usbhid->urbctrl = NULL; |
| 1214 | usbhid->urbout = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Anssi Hannula | be82097 | 2007-01-19 19:28:17 +0200 | [diff] [blame] | 1216 | hid_free_buffers(hid_to_usb_dev(hid), hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | } |
| 1218 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1219 | static int usbhid_power(struct hid_device *hid, int lvl) |
| 1220 | { |
Dmitry Torokhov | 9a83563 | 2017-06-06 23:59:32 -0700 | [diff] [blame] | 1221 | struct usbhid_device *usbhid = hid->driver_data; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1222 | int r = 0; |
| 1223 | |
| 1224 | switch (lvl) { |
| 1225 | case PM_HINT_FULLON: |
Dmitry Torokhov | 9a83563 | 2017-06-06 23:59:32 -0700 | [diff] [blame] | 1226 | r = usb_autopm_get_interface(usbhid->intf); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1227 | break; |
Dmitry Torokhov | 9a83563 | 2017-06-06 23:59:32 -0700 | [diff] [blame] | 1228 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1229 | case PM_HINT_NORMAL: |
Dmitry Torokhov | 9a83563 | 2017-06-06 23:59:32 -0700 | [diff] [blame] | 1230 | usb_autopm_put_interface(usbhid->intf); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1231 | break; |
| 1232 | } |
Dmitry Torokhov | 9a83563 | 2017-06-06 23:59:32 -0700 | [diff] [blame] | 1233 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1234 | return r; |
| 1235 | } |
| 1236 | |
Henrik Rydberg | e90a6df | 2013-02-25 11:31:43 +0100 | [diff] [blame] | 1237 | static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) |
| 1238 | { |
| 1239 | switch (reqtype) { |
| 1240 | case HID_REQ_GET_REPORT: |
| 1241 | usbhid_submit_report(hid, rep, USB_DIR_IN); |
| 1242 | break; |
| 1243 | case HID_REQ_SET_REPORT: |
| 1244 | usbhid_submit_report(hid, rep, USB_DIR_OUT); |
| 1245 | break; |
| 1246 | } |
| 1247 | } |
| 1248 | |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 1249 | static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum, |
| 1250 | __u8 *buf, size_t len, unsigned char rtype, |
| 1251 | int reqtype) |
| 1252 | { |
| 1253 | switch (reqtype) { |
| 1254 | case HID_REQ_GET_REPORT: |
| 1255 | return usbhid_get_raw_report(hid, reportnum, buf, len, rtype); |
| 1256 | case HID_REQ_SET_REPORT: |
| 1257 | return usbhid_set_raw_report(hid, reportnum, buf, len, rtype); |
| 1258 | default: |
| 1259 | return -EIO; |
| 1260 | } |
| 1261 | } |
| 1262 | |
Benjamin Tissoires | 9684819 | 2013-02-27 16:38:17 +0100 | [diff] [blame] | 1263 | static int usbhid_idle(struct hid_device *hid, int report, int idle, |
| 1264 | int reqtype) |
| 1265 | { |
| 1266 | struct usb_device *dev = hid_to_usb_dev(hid); |
| 1267 | struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
| 1268 | struct usb_host_interface *interface = intf->cur_altsetting; |
| 1269 | int ifnum = interface->desc.bInterfaceNumber; |
| 1270 | |
| 1271 | if (reqtype != HID_REQ_SET_IDLE) |
| 1272 | return -EINVAL; |
| 1273 | |
| 1274 | return hid_set_idle(dev, ifnum, report, idle); |
| 1275 | } |
| 1276 | |
Jason Gerecke | fc2237a | 2017-07-24 09:46:18 -0700 | [diff] [blame] | 1277 | struct hid_ll_driver usb_hid_driver = { |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1278 | .parse = usbhid_parse, |
| 1279 | .start = usbhid_start, |
| 1280 | .stop = usbhid_stop, |
| 1281 | .open = usbhid_open, |
| 1282 | .close = usbhid_close, |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1283 | .power = usbhid_power, |
Henrik Rydberg | e90a6df | 2013-02-25 11:31:43 +0100 | [diff] [blame] | 1284 | .request = usbhid_request, |
Henrik Rydberg | 3373443 | 2013-02-25 11:31:44 +0100 | [diff] [blame] | 1285 | .wait = usbhid_wait_io, |
Frank Praznik | 975a683 | 2014-01-22 13:49:42 -0500 | [diff] [blame] | 1286 | .raw_request = usbhid_raw_request, |
| 1287 | .output_report = usbhid_output_report, |
Benjamin Tissoires | 9684819 | 2013-02-27 16:38:17 +0100 | [diff] [blame] | 1288 | .idle = usbhid_idle, |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1289 | }; |
Jason Gerecke | fc2237a | 2017-07-24 09:46:18 -0700 | [diff] [blame] | 1290 | EXPORT_SYMBOL_GPL(usb_hid_driver); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1291 | |
Jiri Kosina | c4c259b | 2009-09-15 16:27:45 +0200 | [diff] [blame] | 1292 | static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | { |
Jiri Slaby | 131d3a7a | 2008-11-14 12:03:47 +0100 | [diff] [blame] | 1294 | struct usb_host_interface *interface = intf->cur_altsetting; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1295 | struct usb_device *dev = interface_to_usbdev(intf); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1296 | struct usbhid_device *usbhid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | struct hid_device *hid; |
Jiri Slaby | 131d3a7a | 2008-11-14 12:03:47 +0100 | [diff] [blame] | 1298 | unsigned int n, has_in = 0; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1299 | size_t len; |
| 1300 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
Jiri Kosina | 58037eb | 2007-05-30 15:07:13 +0200 | [diff] [blame] | 1302 | dbg_hid("HID probe called for ifnum %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | intf->altsetting->desc.bInterfaceNumber); |
| 1304 | |
Jiri Slaby | 131d3a7a | 2008-11-14 12:03:47 +0100 | [diff] [blame] | 1305 | for (n = 0; n < interface->desc.bNumEndpoints; n++) |
| 1306 | if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) |
| 1307 | has_in++; |
| 1308 | if (!has_in) { |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 1309 | hid_err(intf, "couldn't find an input interrupt endpoint\n"); |
Jiri Slaby | 131d3a7a | 2008-11-14 12:03:47 +0100 | [diff] [blame] | 1310 | return -ENODEV; |
| 1311 | } |
| 1312 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1313 | hid = hid_allocate_device(); |
| 1314 | if (IS_ERR(hid)) |
| 1315 | return PTR_ERR(hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
| 1317 | usb_set_intfdata(intf, hid); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1318 | hid->ll_driver = &usb_hid_driver; |
Jiri Slaby | 76483cf | 2008-09-18 12:23:33 +0200 | [diff] [blame] | 1319 | hid->ff_init = hid_pidff_init; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1320 | #ifdef CONFIG_USB_HIDDEV |
Jiri Slaby | 93c1013 | 2008-06-27 00:04:24 +0200 | [diff] [blame] | 1321 | hid->hiddev_connect = hiddev_connect; |
Jiri Kosina | c4c259b | 2009-09-15 16:27:45 +0200 | [diff] [blame] | 1322 | hid->hiddev_disconnect = hiddev_disconnect; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1323 | hid->hiddev_hid_event = hiddev_hid_event; |
| 1324 | hid->hiddev_report_event = hiddev_report_event; |
| 1325 | #endif |
| 1326 | hid->dev.parent = &intf->dev; |
| 1327 | hid->bus = BUS_USB; |
| 1328 | hid->vendor = le16_to_cpu(dev->descriptor.idVendor); |
| 1329 | hid->product = le16_to_cpu(dev->descriptor.idProduct); |
Niels Skou Olsen | d5158e0 | 2017-10-04 12:29:57 +0200 | [diff] [blame] | 1330 | hid->version = le16_to_cpu(dev->descriptor.bcdDevice); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1331 | hid->name[0] = 0; |
Jiri Slaby | a73a637 | 2008-10-22 14:45:11 +0200 | [diff] [blame] | 1332 | if (intf->cur_altsetting->desc.bInterfaceProtocol == |
| 1333 | USB_INTERFACE_PROTOCOL_MOUSE) |
| 1334 | hid->type = HID_TYPE_USBMOUSE; |
Tomoki Sekiyama | 6dc1418 | 2011-05-23 15:45:44 -0700 | [diff] [blame] | 1335 | else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0) |
| 1336 | hid->type = HID_TYPE_USBNONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1338 | if (dev->manufacturer) |
| 1339 | strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); |
| 1340 | |
| 1341 | if (dev->product) { |
| 1342 | if (dev->manufacturer) |
| 1343 | strlcat(hid->name, " ", sizeof(hid->name)); |
| 1344 | strlcat(hid->name, dev->product, sizeof(hid->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | } |
| 1346 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1347 | if (!strlen(hid->name)) |
| 1348 | snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", |
| 1349 | le16_to_cpu(dev->descriptor.idVendor), |
| 1350 | le16_to_cpu(dev->descriptor.idProduct)); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1351 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1352 | usb_make_path(dev, hid->phys, sizeof(hid->phys)); |
| 1353 | strlcat(hid->phys, "/input", sizeof(hid->phys)); |
| 1354 | len = strlen(hid->phys); |
| 1355 | if (len < sizeof(hid->phys) - 1) |
| 1356 | snprintf(hid->phys + len, sizeof(hid->phys) - len, |
| 1357 | "%d", intf->altsetting[0].desc.bInterfaceNumber); |
Geoff Levand | 4a1a4d8 | 2007-01-15 20:11:52 -0800 | [diff] [blame] | 1358 | |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1359 | if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) |
| 1360 | hid->uniq[0] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1362 | usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); |
| 1363 | if (usbhid == NULL) { |
| 1364 | ret = -ENOMEM; |
| 1365 | goto err; |
| 1366 | } |
| 1367 | |
| 1368 | hid->driver_data = usbhid; |
| 1369 | usbhid->hid = hid; |
Jiri Kosina | 57ab12e | 2010-02-17 14:25:01 +0100 | [diff] [blame] | 1370 | usbhid->intf = intf; |
| 1371 | usbhid->ifnum = interface->desc.bInterfaceNumber; |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1372 | |
Alan Stern | fde4e2f | 2010-05-07 10:41:10 -0400 | [diff] [blame] | 1373 | init_waitqueue_head(&usbhid->wait); |
| 1374 | INIT_WORK(&usbhid->reset_work, hid_reset); |
Kees Cook | 0ee3277 | 2017-10-04 17:53:24 -0700 | [diff] [blame] | 1375 | timer_setup(&usbhid->io_retry, hid_retry_timeout, 0); |
Alan Stern | fde4e2f | 2010-05-07 10:41:10 -0400 | [diff] [blame] | 1376 | spin_lock_init(&usbhid->lock); |
| 1377 | |
Jiri Slaby | 85cdaf5 | 2008-05-16 11:49:15 +0200 | [diff] [blame] | 1378 | ret = hid_add_device(hid); |
| 1379 | if (ret) { |
Jiri Slaby | d458a9d | 2008-05-16 11:49:20 +0200 | [diff] [blame] | 1380 | if (ret != -ENODEV) |
Joe Perches | 4291ee3 | 2010-12-09 19:29:03 -0800 | [diff] [blame] | 1381 | hid_err(intf, "can't add hid device: %d\n", ret); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1382 | goto err_free; |
Jiri Slaby | 85cdaf5 | 2008-05-16 11:49:15 +0200 | [diff] [blame] | 1383 | } |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1384 | |
| 1385 | return 0; |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1386 | err_free: |
| 1387 | kfree(usbhid); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1388 | err: |
| 1389 | hid_destroy_device(hid); |
Jiri Slaby | 85cdaf5 | 2008-05-16 11:49:15 +0200 | [diff] [blame] | 1390 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | } |
| 1392 | |
Jiri Kosina | c4c259b | 2009-09-15 16:27:45 +0200 | [diff] [blame] | 1393 | static void usbhid_disconnect(struct usb_interface *intf) |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1394 | { |
| 1395 | struct hid_device *hid = usb_get_intfdata(intf); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1396 | struct usbhid_device *usbhid; |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1397 | |
| 1398 | if (WARN_ON(!hid)) |
| 1399 | return; |
| 1400 | |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1401 | usbhid = hid->driver_data; |
Reyad Attiyat | 46df9deda | 2014-07-25 00:13:01 -0500 | [diff] [blame] | 1402 | spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
| 1403 | set_bit(HID_DISCONNECTED, &usbhid->iofl); |
| 1404 | spin_unlock_irq(&usbhid->lock); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1405 | hid_destroy_device(hid); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1406 | kfree(usbhid); |
Jiri Slaby | c500c97 | 2008-05-16 11:49:16 +0200 | [diff] [blame] | 1407 | } |
| 1408 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1409 | static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | { |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1411 | del_timer_sync(&usbhid->io_retry); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1412 | cancel_work_sync(&usbhid->reset_work); |
| 1413 | } |
| 1414 | |
| 1415 | static void hid_cease_io(struct usbhid_device *usbhid) |
| 1416 | { |
Oliver Neukum | fad9fbe8 | 2011-10-13 18:21:58 +0200 | [diff] [blame] | 1417 | del_timer_sync(&usbhid->io_retry); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1418 | usb_kill_urb(usbhid->urbin); |
| 1419 | usb_kill_urb(usbhid->urbctrl); |
| 1420 | usb_kill_urb(usbhid->urbout); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1421 | } |
| 1422 | |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1423 | static void hid_restart_io(struct hid_device *hid) |
| 1424 | { |
| 1425 | struct usbhid_device *usbhid = hid->driver_data; |
| 1426 | int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| 1427 | int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl); |
| 1428 | |
| 1429 | spin_lock_irq(&usbhid->lock); |
| 1430 | clear_bit(HID_SUSPENDED, &usbhid->iofl); |
| 1431 | usbhid_mark_busy(usbhid); |
| 1432 | |
| 1433 | if (clear_halt || reset_pending) |
| 1434 | schedule_work(&usbhid->reset_work); |
| 1435 | usbhid->retry_delay = 0; |
| 1436 | spin_unlock_irq(&usbhid->lock); |
| 1437 | |
| 1438 | if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl)) |
| 1439 | return; |
| 1440 | |
| 1441 | if (!clear_halt) { |
| 1442 | if (hid_start_in(hid) < 0) |
| 1443 | hid_io_error(hid); |
| 1444 | } |
| 1445 | |
| 1446 | spin_lock_irq(&usbhid->lock); |
| 1447 | if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| 1448 | usbhid_restart_out_queue(usbhid); |
| 1449 | if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| 1450 | usbhid_restart_ctrl_queue(usbhid); |
| 1451 | spin_unlock_irq(&usbhid->lock); |
| 1452 | } |
| 1453 | |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1454 | /* Treat USB reset pretty much the same as suspend/resume */ |
| 1455 | static int hid_pre_reset(struct usb_interface *intf) |
| 1456 | { |
| 1457 | struct hid_device *hid = usb_get_intfdata(intf); |
Jiri Kosina | 4916b3a | 2006-12-08 18:41:03 +0100 | [diff] [blame] | 1458 | struct usbhid_device *usbhid = hid->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1460 | spin_lock_irq(&usbhid->lock); |
| 1461 | set_bit(HID_RESET_PENDING, &usbhid->iofl); |
| 1462 | spin_unlock_irq(&usbhid->lock); |
| 1463 | hid_cease_io(usbhid); |
Jiri Slaby | 3d5afd3 | 2008-10-27 12:16:15 +0100 | [diff] [blame] | 1464 | |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1465 | return 0; |
| 1466 | } |
| 1467 | |
| 1468 | /* Same routine used for post_reset and reset_resume */ |
| 1469 | static int hid_post_reset(struct usb_interface *intf) |
| 1470 | { |
| 1471 | struct usb_device *dev = interface_to_usbdev (intf); |
| 1472 | struct hid_device *hid = usb_get_intfdata(intf); |
| 1473 | struct usbhid_device *usbhid = hid->driver_data; |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1474 | struct usb_host_interface *interface = intf->cur_altsetting; |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1475 | int status; |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1476 | char *rdesc; |
| 1477 | |
| 1478 | /* Fetch and examine the HID report descriptor. If this |
| 1479 | * has changed, then rebind. Since usbcore's check of the |
| 1480 | * configuration descriptors passed, we already know that |
| 1481 | * the size of the HID report descriptor has not changed. |
| 1482 | */ |
Kevin Daughtridge | 86e6b77 | 2012-09-20 12:00:32 -0700 | [diff] [blame] | 1483 | rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL); |
Joe Perches | 52150c7 | 2017-03-01 17:35:07 -0800 | [diff] [blame] | 1484 | if (!rdesc) |
Pan Bian | c60fa55 | 2016-12-05 19:37:24 +0800 | [diff] [blame] | 1485 | return -ENOMEM; |
Joe Perches | 52150c7 | 2017-03-01 17:35:07 -0800 | [diff] [blame] | 1486 | |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1487 | status = hid_get_class_descriptor(dev, |
| 1488 | interface->desc.bInterfaceNumber, |
Kevin Daughtridge | 86e6b77 | 2012-09-20 12:00:32 -0700 | [diff] [blame] | 1489 | HID_DT_REPORT, rdesc, hid->dev_rsize); |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1490 | if (status < 0) { |
| 1491 | dbg_hid("reading report descriptor failed (post_reset)\n"); |
| 1492 | kfree(rdesc); |
Pan Bian | c60fa55 | 2016-12-05 19:37:24 +0800 | [diff] [blame] | 1493 | return status; |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1494 | } |
Kevin Daughtridge | 86e6b77 | 2012-09-20 12:00:32 -0700 | [diff] [blame] | 1495 | status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize); |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1496 | kfree(rdesc); |
| 1497 | if (status != 0) { |
| 1498 | dbg_hid("report descriptor changed\n"); |
Pan Bian | c60fa55 | 2016-12-05 19:37:24 +0800 | [diff] [blame] | 1499 | return -EPERM; |
Simon Haggett | dc3c78e | 2012-04-03 16:04:15 +0100 | [diff] [blame] | 1500 | } |
Jiri Kosina | 70fa9f2 | 2009-06-04 15:48:38 +0200 | [diff] [blame] | 1501 | |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1502 | /* No need to do another reset or clear a halted endpoint */ |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1503 | spin_lock_irq(&usbhid->lock); |
| 1504 | clear_bit(HID_RESET_PENDING, &usbhid->iofl); |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1505 | clear_bit(HID_CLEAR_HALT, &usbhid->iofl); |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1506 | spin_unlock_irq(&usbhid->lock); |
| 1507 | hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1508 | |
| 1509 | hid_restart_io(hid); |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1510 | |
| 1511 | return 0; |
| 1512 | } |
| 1513 | |
Jiri Kosina | 0f6f140 | 2009-01-19 09:17:18 +0100 | [diff] [blame] | 1514 | #ifdef CONFIG_PM |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1515 | static int hid_resume_common(struct hid_device *hid, bool driver_suspended) |
| 1516 | { |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1517 | int status = 0; |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1518 | |
Alan Stern | 972e6a9 | 2016-03-23 12:17:09 -0400 | [diff] [blame] | 1519 | hid_restart_io(hid); |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1520 | if (driver_suspended && hid->driver && hid->driver->resume) |
| 1521 | status = hid->driver->resume(hid); |
| 1522 | return status; |
| 1523 | } |
| 1524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | static int hid_suspend(struct usb_interface *intf, pm_message_t message) |
| 1526 | { |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1527 | struct hid_device *hid = usb_get_intfdata(intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | struct usbhid_device *usbhid = hid->driver_data; |
Ming Lei | 37093b7 | 2013-03-15 12:08:55 +0800 | [diff] [blame] | 1529 | int status = 0; |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1530 | bool driver_suspended = false; |
David Herrmann | bfde79c | 2013-07-15 19:10:13 +0200 | [diff] [blame] | 1531 | unsigned int ledcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
Alan Stern | 5b1b0b8 | 2011-08-19 23:49:48 +0200 | [diff] [blame] | 1533 | if (PMSG_IS_AUTO(message)) { |
David Herrmann | bfde79c | 2013-07-15 19:10:13 +0200 | [diff] [blame] | 1534 | ledcount = hidinput_count_leds(hid); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1535 | spin_lock_irq(&usbhid->lock); /* Sync with error handler */ |
| 1536 | if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) |
| 1537 | && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) |
| 1538 | && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) |
| 1539 | && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) |
| 1540 | && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) |
David Herrmann | bfde79c | 2013-07-15 19:10:13 +0200 | [diff] [blame] | 1541 | && (!ledcount || ignoreled)) |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1542 | { |
Alan Stern | f2b5264 | 2012-07-19 16:08:45 -0400 | [diff] [blame] | 1543 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1544 | spin_unlock_irq(&usbhid->lock); |
Bruno Prémont | 6a740aa | 2010-04-25 21:40:03 +0200 | [diff] [blame] | 1545 | if (hid->driver && hid->driver->suspend) { |
| 1546 | status = hid->driver->suspend(hid, message); |
| 1547 | if (status < 0) |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1548 | goto failed; |
Bruno Prémont | 6a740aa | 2010-04-25 21:40:03 +0200 | [diff] [blame] | 1549 | } |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1550 | driver_suspended = true; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1551 | } else { |
| 1552 | usbhid_mark_busy(usbhid); |
| 1553 | spin_unlock_irq(&usbhid->lock); |
| 1554 | return -EBUSY; |
| 1555 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1557 | } else { |
Ming Lei | 37093b7 | 2013-03-15 12:08:55 +0800 | [diff] [blame] | 1558 | /* TODO: resume() might need to handle suspend failure */ |
| 1559 | if (hid->driver && hid->driver->suspend) |
Bruno Prémont | 6a740aa | 2010-04-25 21:40:03 +0200 | [diff] [blame] | 1560 | status = hid->driver->suspend(hid, message); |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1561 | driver_suspended = true; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1562 | spin_lock_irq(&usbhid->lock); |
Alan Stern | f2b5264 | 2012-07-19 16:08:45 -0400 | [diff] [blame] | 1563 | set_bit(HID_SUSPENDED, &usbhid->iofl); |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1564 | spin_unlock_irq(&usbhid->lock); |
Ming Lei | 37093b7 | 2013-03-15 12:08:55 +0800 | [diff] [blame] | 1565 | if (usbhid_wait_io(hid) < 0) |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1566 | status = -EIO; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1567 | } |
| 1568 | |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1569 | hid_cancel_delayed_stuff(usbhid); |
| 1570 | hid_cease_io(usbhid); |
| 1571 | |
Alan Stern | 5b1b0b8 | 2011-08-19 23:49:48 +0200 | [diff] [blame] | 1572 | if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1573 | /* lost race against keypresses */ |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1574 | status = -EBUSY; |
| 1575 | goto failed; |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1576 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | dev_dbg(&intf->dev, "suspend\n"); |
Ming Lei | 37093b7 | 2013-03-15 12:08:55 +0800 | [diff] [blame] | 1578 | return status; |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1579 | |
| 1580 | failed: |
| 1581 | hid_resume_common(hid, driver_suspended); |
| 1582 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | } |
| 1584 | |
| 1585 | static int hid_resume(struct usb_interface *intf) |
| 1586 | { |
| 1587 | struct hid_device *hid = usb_get_intfdata (intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | int status; |
| 1589 | |
Alan Stern | eb055fd | 2012-07-19 16:09:01 -0400 | [diff] [blame] | 1590 | status = hid_resume_common(hid, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | dev_dbg(&intf->dev, "resume status %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | return 0; |
| 1593 | } |
| 1594 | |
Oliver Neukum | 378a0ed | 2009-02-18 11:46:45 +0100 | [diff] [blame] | 1595 | static int hid_reset_resume(struct usb_interface *intf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | { |
Oliver Neukum | 378a0ed | 2009-02-18 11:46:45 +0100 | [diff] [blame] | 1597 | struct hid_device *hid = usb_get_intfdata(intf); |
Bruno Prémont | 6a740aa | 2010-04-25 21:40:03 +0200 | [diff] [blame] | 1598 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Bruno Prémont | 6a740aa | 2010-04-25 21:40:03 +0200 | [diff] [blame] | 1600 | status = hid_post_reset(intf); |
| 1601 | if (status >= 0 && hid->driver && hid->driver->reset_resume) { |
| 1602 | int ret = hid->driver->reset_resume(hid); |
| 1603 | if (ret < 0) |
| 1604 | status = ret; |
| 1605 | } |
| 1606 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
| 1608 | |
Jiri Kosina | ae2f007 | 2009-02-20 12:47:08 +0100 | [diff] [blame] | 1609 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | |
Márton Németh | d67dec5 | 2010-01-10 17:59:22 +0100 | [diff] [blame] | 1611 | static const struct usb_device_id hid_usb_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, |
| 1613 | .bInterfaceClass = USB_INTERFACE_CLASS_HID }, |
| 1614 | { } /* Terminating entry */ |
| 1615 | }; |
| 1616 | |
| 1617 | MODULE_DEVICE_TABLE (usb, hid_usb_ids); |
| 1618 | |
| 1619 | static struct usb_driver hid_driver = { |
| 1620 | .name = "usbhid", |
Jiri Kosina | c4c259b | 2009-09-15 16:27:45 +0200 | [diff] [blame] | 1621 | .probe = usbhid_probe, |
| 1622 | .disconnect = usbhid_disconnect, |
Jiri Kosina | 0f6f140 | 2009-01-19 09:17:18 +0100 | [diff] [blame] | 1623 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | .suspend = hid_suspend, |
| 1625 | .resume = hid_resume, |
Oliver Neukum | 378a0ed | 2009-02-18 11:46:45 +0100 | [diff] [blame] | 1626 | .reset_resume = hid_reset_resume, |
Jiri Kosina | 0f6f140 | 2009-01-19 09:17:18 +0100 | [diff] [blame] | 1627 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | .pre_reset = hid_pre_reset, |
| 1629 | .post_reset = hid_post_reset, |
| 1630 | .id_table = hid_usb_ids, |
Oliver Neukum | 933e318 | 2007-07-11 14:48:58 +0200 | [diff] [blame] | 1631 | .supports_autosuspend = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | }; |
| 1633 | |
Guillaume Chazarain | 8fe294c | 2010-09-12 21:32:35 +0200 | [diff] [blame] | 1634 | struct usb_interface *usbhid_find_interface(int minor) |
| 1635 | { |
| 1636 | return usb_find_interface(&hid_driver, minor); |
| 1637 | } |
| 1638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | static int __init hid_init(void) |
| 1640 | { |
Oliver Neukum | 0361a28 | 2008-12-17 15:38:03 +0100 | [diff] [blame] | 1641 | int retval = -ENOMEM; |
| 1642 | |
Benjamin Tissoires | d5d3e20 | 2017-11-20 11:48:41 +0100 | [diff] [blame] | 1643 | retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS); |
Paul Walmsley | 876b927 | 2007-04-19 14:56:12 +0200 | [diff] [blame] | 1644 | if (retval) |
| 1645 | goto usbhid_quirks_init_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | retval = usb_register(&hid_driver); |
| 1647 | if (retval) |
| 1648 | goto usb_register_fail; |
Joe Perches | 52150c7 | 2017-03-01 17:35:07 -0800 | [diff] [blame] | 1649 | pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | |
| 1651 | return 0; |
| 1652 | usb_register_fail: |
Benjamin Tissoires | d5d3e20 | 2017-11-20 11:48:41 +0100 | [diff] [blame] | 1653 | hid_quirks_exit(BUS_USB); |
Paul Walmsley | 876b927 | 2007-04-19 14:56:12 +0200 | [diff] [blame] | 1654 | usbhid_quirks_init_fail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | return retval; |
| 1656 | } |
| 1657 | |
| 1658 | static void __exit hid_exit(void) |
| 1659 | { |
| 1660 | usb_deregister(&hid_driver); |
Benjamin Tissoires | d5d3e20 | 2017-11-20 11:48:41 +0100 | [diff] [blame] | 1661 | hid_quirks_exit(BUS_USB); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | } |
| 1663 | |
| 1664 | module_init(hid_init); |
| 1665 | module_exit(hid_exit); |
| 1666 | |
Jiri Kosina | 88adb72 | 2009-10-02 18:29:34 +0200 | [diff] [blame] | 1667 | MODULE_AUTHOR("Andreas Gal"); |
| 1668 | MODULE_AUTHOR("Vojtech Pavlik"); |
| 1669 | MODULE_AUTHOR("Jiri Kosina"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | MODULE_DESCRIPTION(DRIVER_DESC); |
Grant Grundler | 7021b60 | 2017-01-05 11:07:04 -0800 | [diff] [blame] | 1671 | MODULE_LICENSE("GPL"); |