kernel/drivers/hid/usbhid/hid-quirks.c

   1 /*
   2  *  USB HID quirks support for Linux
   3  *
   4  *  Copyright (c) 1999 Andreas Gal
   5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7  *  Copyright (c) 2006-2007 Jiri Kosina
   8  *  Copyright (c) 2007 Paul Walmsley
   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/hid.h>
  19 #include <linux/export.h>
  20 #include <linux/slab.h>
  21
  22 #include "../hid-ids.h"
  23
  24 /*
  25  * Alphabetically sorted blacklist by quirk type.
  26  */
  27
  28 static const struct hid_blacklist {
  29         __u16 idVendor;
  30         __u16 idProduct;
  31         __u32 quirks;
  32 } hid_blacklist[] = {
  33         { USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_GAMEPAD, HID_QUIRK_BADPAD },
  34         { USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_PREDATOR, HID_QUIRK_BADPAD },
  35         { USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },
  36         { USB_VENDOR_ID_CHIC, USB_DEVICE_ID_CHIC_GAMEPAD, HID_QUIRK_BADPAD },
  37         { USB_VENDOR_ID_DWAV, USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER, HID_QUIRK_MULTI_INPUT | HID_QUIRK_NOGET },
  38         { USB_VENDOR_ID_MOJO, USB_DEVICE_ID_RETRO_ADAPTER, HID_QUIRK_MULTI_INPUT },
  39         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_DRIVING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
  40         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FLYING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
  41         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FIGHTING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
  42         { USB_VENDOR_ID_NATSU, USB_DEVICE_ID_NATSU_GAMEPAD, HID_QUIRK_BADPAD },
  43         { USB_VENDOR_ID_NEC, USB_DEVICE_ID_NEC_USB_GAME_PAD, HID_QUIRK_BADPAD },
  44         { USB_VENDOR_ID_NEXTWINDOW, USB_DEVICE_ID_NEXTWINDOW_TOUCHSCREEN, HID_QUIRK_MULTI_INPUT},
  45         { USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RUMBLEPAD, HID_QUIRK_BADPAD },
  46         { USB_VENDOR_ID_TOPMAX, USB_DEVICE_ID_TOPMAX_COBRAPAD, HID_QUIRK_BADPAD },
  47
  48         { USB_VENDOR_ID_AFATECH, USB_DEVICE_ID_AFATECH_AF9016, HID_QUIRK_FULLSPEED_INTERVAL },
  49
  50         { USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II, HID_QUIRK_MULTI_INPUT },
  51         { USB_VENDOR_ID_ETURBOTOUCH, USB_DEVICE_ID_ETURBOTOUCH, HID_QUIRK_MULTI_INPUT },
  52         { USB_VENDOR_ID_ETURBOTOUCH, USB_DEVICE_ID_ETURBOTOUCH_2968, HID_QUIRK_MULTI_INPUT },
  53         { USB_VENDOR_ID_GREENASIA, USB_DEVICE_ID_GREENASIA_DUAL_USB_JOYPAD, HID_QUIRK_MULTI_INPUT },
  54         { USB_VENDOR_ID_PANTHERLORD, USB_DEVICE_ID_PANTHERLORD_TWIN_USB_JOYSTICK, HID_QUIRK_MULTI_INPUT | HID_QUIRK_SKIP_OUTPUT_REPORTS },
  55         { USB_VENDOR_ID_TOUCHPACK, USB_DEVICE_ID_TOUCHPACK_RTS, HID_QUIRK_MULTI_INPUT },
  56
  57         { USB_VENDOR_ID_AIREN, USB_DEVICE_ID_AIREN_SLIMPLUS, HID_QUIRK_NOGET },
  58         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM, HID_QUIRK_NOGET },
  59         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS124U, HID_QUIRK_NOGET },
  60         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET },
  61         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET },
  62         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
  63         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS682, HID_QUIRK_NOGET },
  64         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS692, HID_QUIRK_NOGET },
  65         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FIGHTERSTICK, HID_QUIRK_NOGET },
  66         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_COMBATSTICK, HID_QUIRK_NOGET },
  67         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FLIGHT_SIM_ECLIPSE_YOKE, HID_QUIRK_NOGET },
  68         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FLIGHT_SIM_YOKE, HID_QUIRK_NOGET },
  69         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_PRO_THROTTLE, HID_QUIRK_NOGET },
  70         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_PRO_PEDALS, HID_QUIRK_NOGET },
  71         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_3AXIS_5BUTTON_STICK, HID_QUIRK_NOGET },
  72         { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_AXIS_295, HID_QUIRK_NOGET },
  73         { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
  74         { USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_CREATIVE_SB_OMNI_SURROUND_51, HID_QUIRK_NOGET },
  75         { USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
  76         { USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_WIIU, HID_QUIRK_MULTI_INPUT },
  77         { USB_VENDOR_ID_ELAN, HID_ANY_ID, HID_QUIRK_ALWAYS_POLL },
  78         { USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
  79         { USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS },
  80         { USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET },
  81         { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0A4A, HID_QUIRK_ALWAYS_POLL },
  82         { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0B4A, HID_QUIRK_ALWAYS_POLL },
  83         { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
  84         { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C077, HID_QUIRK_ALWAYS_POLL },
  85         { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_KEYBOARD_G710_PLUS, HID_QUIRK_NOGET },
  86         { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOUSE_C01A, HID_QUIRK_ALWAYS_POLL },
  87         { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOUSE_C05A, HID_QUIRK_ALWAYS_POLL },
  88         { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOUSE_C06A, HID_QUIRK_ALWAYS_POLL },
  89         { USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS, HID_QUIRK_NOGET },
  90         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_SURFACE_PRO_2, HID_QUIRK_NO_INIT_REPORTS },
  91         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_2, HID_QUIRK_NO_INIT_REPORTS },
  92         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TOUCH_COVER_2, HID_QUIRK_NO_INIT_REPORTS },
  93         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_PRO_3, HID_QUIRK_NO_INIT_REPORTS },
  94         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2, HID_QUIRK_NO_INIT_REPORTS },
  95         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP, HID_QUIRK_NO_INIT_REPORTS },
  96         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_3, HID_QUIRK_NO_INIT_REPORTS },
  97         { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_POWER_COVER, HID_QUIRK_NO_INIT_REPORTS },
  98         { USB_VENDOR_ID_MSI, USB_DEVICE_ID_MSI_GT683R_LED_PANEL, HID_QUIRK_NO_INIT_REPORTS },
  99         { USB_VENDOR_ID_NEXIO, USB_DEVICE_ID_NEXIO_MULTITOUCH_PTI0750, HID_QUIRK_NO_INIT_REPORTS },
 100         { USB_VENDOR_ID_NOVATEK, USB_DEVICE_ID_NOVATEK_MOUSE, HID_QUIRK_NO_INIT_REPORTS },
 101         { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1610, HID_QUIRK_NOGET },
 102         { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1640, HID_QUIRK_NOGET },
 103         { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
 104         { USB_VENDOR_ID_KYE, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE_ID2, HID_QUIRK_ALWAYS_POLL },
 105         { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NO_INIT_REPORTS },
 106         { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1, HID_QUIRK_NO_INIT_REPORTS },
 107         { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2, HID_QUIRK_NO_INIT_REPORTS },
 108         { USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_MOUSE_4D22, HID_QUIRK_ALWAYS_POLL },
 109         { USB_VENDOR_ID_PRODIGE, USB_DEVICE_ID_PRODIGE_CORDLESS, HID_QUIRK_NOGET },
 110         { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001, HID_QUIRK_NOGET },
 111         { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008, HID_QUIRK_NOGET },
 112         { USB_VENDOR_ID_REALTEK, USB_DEVICE_ID_REALTEK_READER, HID_QUIRK_NO_INIT_REPORTS },
 113         { USB_VENDOR_ID_SENNHEISER, USB_DEVICE_ID_SENNHEISER_BTD500USB, HID_QUIRK_NOGET },
 114         { USB_VENDOR_ID_SIGMATEL, USB_DEVICE_ID_SIGMATEL_STMP3780, HID_QUIRK_NOGET },
 115         { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS9200_TOUCH, HID_QUIRK_NOGET },
 116         { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS817_TOUCH, HID_QUIRK_NOGET },
 117         { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS_TS, HID_QUIRK_NO_INIT_REPORTS },
 118         { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS1030_TOUCH, HID_QUIRK_NOGET },
 119         { USB_VENDOR_ID_SUN, USB_DEVICE_ID_RARITAN_KVM_DONGLE, HID_QUIRK_NOGET },
 120         { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_1, HID_QUIRK_NOGET },
 121         { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_2, HID_QUIRK_NOGET },
 122         { USB_VENDOR_ID_TPV, USB_DEVICE_ID_TPV_OPTICAL_TOUCHSCREEN_8882, HID_QUIRK_NOGET },
 123         { USB_VENDOR_ID_TPV, USB_DEVICE_ID_TPV_OPTICAL_TOUCHSCREEN_8883, HID_QUIRK_NOGET },
 124         { USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_KEYBOARD, HID_QUIRK_NOGET },
 125         { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_KNA5, HID_QUIRK_MULTI_INPUT },
 126         { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWA60, HID_QUIRK_MULTI_INPUT },
 127         { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH, HID_QUIRK_MULTI_INPUT },
 128         { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH, HID_QUIRK_MULTI_INPUT },
 129         { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET, HID_QUIRK_MULTI_INPUT },
 130         { USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_QUAD_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
 131
 132         { USB_VENDOR_ID_WISEGROUP_LTD2, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
 133
 134         { USB_VENDOR_ID_PI_ENGINEERING, USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL, HID_QUIRK_HIDINPUT_FORCE },
 135
 136         { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH, HID_QUIRK_MULTI_INPUT },
 137         { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS, HID_QUIRK_MULTI_INPUT },
 138         { USB_VENDOR_ID_SIGMA_MICRO, USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD, HID_QUIRK_NO_INIT_REPORTS },
 139         { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X, HID_QUIRK_MULTI_INPUT },
 140         { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X_2, HID_QUIRK_MULTI_INPUT },
 141         { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X, HID_QUIRK_MULTI_INPUT },
 142         { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_PENSKETCH_M912, HID_QUIRK_MULTI_INPUT },
 143         { USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_DUOSENSE, HID_QUIRK_NO_INIT_REPORTS },
 144         { USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD, HID_QUIRK_NO_INIT_REPORTS },
 145         { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS1, HID_QUIRK_NO_INIT_REPORTS },
 146         { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS2, HID_QUIRK_NO_INIT_REPORTS },
 147         { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_HD, HID_QUIRK_NO_INIT_REPORTS },
 148         { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_QUAD_HD, HID_QUIRK_NO_INIT_REPORTS },
 149         { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP_V103, HID_QUIRK_NO_INIT_REPORTS },
 150         { USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A096, HID_QUIRK_NO_INIT_INPUT_REPORTS },
 151         { USB_VENDOR_ID_MULTIPLE_1781, USB_DEVICE_ID_RAPHNET_4NES4SNES_OLD, HID_QUIRK_MULTI_INPUT },
 152         { USB_VENDOR_ID_DRACAL_RAPHNET, USB_DEVICE_ID_RAPHNET_2NES2SNES, HID_QUIRK_MULTI_INPUT },
 153         { USB_VENDOR_ID_DRACAL_RAPHNET, USB_DEVICE_ID_RAPHNET_4NES4SNES, HID_QUIRK_MULTI_INPUT },
 154
 155         { 0, 0 }
 156 };
 157
 158 /* Dynamic HID quirks list - specified at runtime */
 159 struct quirks_list_struct {
 160         struct hid_blacklist hid_bl_item;
 161         struct list_head node;
 162 };
 163
 164 static LIST_HEAD(dquirks_list);
 165 static DECLARE_RWSEM(dquirks_rwsem);
 166
 167 /* Runtime ("dynamic") quirks manipulation functions */
 168
 169 /**
 170  * usbhid_exists_dquirk: find any dynamic quirks for a USB HID device
 171  * @idVendor: the 16-bit USB vendor ID, in native byteorder
 172  * @idProduct: the 16-bit USB product ID, in native byteorder
 173  *
 174  * Description:
 175  *         Scans dquirks_list for a matching dynamic quirk and returns
 176  *         the pointer to the relevant struct hid_blacklist if found.
 177  *         Must be called with a read lock held on dquirks_rwsem.
 178  *
 179  * Returns: NULL if no quirk found, struct hid_blacklist * if found.
 180  */
 181 static struct hid_blacklist *usbhid_exists_dquirk(const u16 idVendor,
 182                 const u16 idProduct)
 183 {
 184         struct quirks_list_struct *q;
 185         struct hid_blacklist *bl_entry = NULL;
 186
 187         list_for_each_entry(q, &dquirks_list, node) {
 188                 if (q->hid_bl_item.idVendor == idVendor &&
 189                                 q->hid_bl_item.idProduct == idProduct) {
 190                         bl_entry = &q->hid_bl_item;
 191                         break;
 192                 }
 193         }
 194
 195         if (bl_entry != NULL)
 196                 dbg_hid("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
 197                                 bl_entry->quirks, bl_entry->idVendor,
 198                                 bl_entry->idProduct);
 199
 200         return bl_entry;
 201 }
 202
 203
 204 /**
 205  * usbhid_modify_dquirk: add/replace a HID quirk
 206  * @idVendor: the 16-bit USB vendor ID, in native byteorder
 207  * @idProduct: the 16-bit USB product ID, in native byteorder
 208  * @quirks: the u32 quirks value to add/replace
 209  *
 210  * Description:
 211  *         If an dynamic quirk exists in memory for this (idVendor,
 212  *         idProduct) pair, replace its quirks value with what was
 213  *         provided.  Otherwise, add the quirk to the dynamic quirks list.
 214  *
 215  * Returns: 0 OK, -error on failure.
 216  */
 217 static int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct,
 218                                 const u32 quirks)
 219 {
 220         struct quirks_list_struct *q_new, *q;
 221         int list_edited = 0;
 222
 223         if (!idVendor) {
 224                 dbg_hid("Cannot add a quirk with idVendor = 0\n");
 225                 return -EINVAL;
 226         }
 227
 228         q_new = kmalloc(sizeof(struct quirks_list_struct), GFP_KERNEL);
 229         if (!q_new) {
 230                 dbg_hid("Could not allocate quirks_list_struct\n");
 231                 return -ENOMEM;
 232         }
 233
 234         q_new->hid_bl_item.idVendor = idVendor;
 235         q_new->hid_bl_item.idProduct = idProduct;
 236         q_new->hid_bl_item.quirks = quirks;
 237
 238         down_write(&dquirks_rwsem);
 239
 240         list_for_each_entry(q, &dquirks_list, node) {
 241
 242                 if (q->hid_bl_item.idVendor == idVendor &&
 243                                 q->hid_bl_item.idProduct == idProduct) {
 244
 245                         list_replace(&q->node, &q_new->node);
 246                         kfree(q);
 247                         list_edited = 1;
 248                         break;
 249
 250                 }
 251
 252         }
 253
 254         if (!list_edited)
 255                 list_add_tail(&q_new->node, &dquirks_list);
 256
 257         up_write(&dquirks_rwsem);
 258
 259         return 0;
 260 }
 261
 262 /**
 263  * usbhid_remove_all_dquirks: remove all runtime HID quirks from memory
 264  *
 265  * Description:
 266  *         Free all memory associated with dynamic quirks - called before
 267  *         module unload.
 268  *
 269  */
 270 static void usbhid_remove_all_dquirks(void)
 271 {
 272         struct quirks_list_struct *q, *temp;
 273
 274         down_write(&dquirks_rwsem);
 275         list_for_each_entry_safe(q, temp, &dquirks_list, node) {
 276                 list_del(&q->node);
 277                 kfree(q);
 278         }
 279         up_write(&dquirks_rwsem);
 280
 281 }
 282
 283 /**
 284  * usbhid_quirks_init: apply USB HID quirks specified at module load time
 285  */
 286 int usbhid_quirks_init(char **quirks_param)
 287 {
 288         u16 idVendor, idProduct;
 289         u32 quirks;
 290         int n = 0, m;
 291
 292         for (; n < MAX_USBHID_BOOT_QUIRKS && quirks_param[n]; n++) {
 293
 294                 m = sscanf(quirks_param[n], "0x%hx:0x%hx:0x%x",
 295                                 &idVendor, &idProduct, &quirks);
 296
 297                 if (m != 3 ||
 298                                 usbhid_modify_dquirk(idVendor, idProduct, quirks) != 0) {
 299                         printk(KERN_WARNING
 300                                         "Could not parse HID quirk module param %s\n",
 301                                         quirks_param[n]);
 302                 }
 303         }
 304
 305         return 0;
 306 }
 307
 308 /**
 309  * usbhid_quirks_exit: release memory associated with dynamic_quirks
 310  *
 311  * Description:
 312  *     Release all memory associated with dynamic quirks.  Called upon
 313  *     module unload.
 314  *
 315  * Returns: nothing
 316  */
 317 void usbhid_quirks_exit(void)
 318 {
 319         usbhid_remove_all_dquirks();
 320 }
 321
 322 /**
 323  * usbhid_exists_squirk: return any static quirks for a USB HID device
 324  * @idVendor: the 16-bit USB vendor ID, in native byteorder
 325  * @idProduct: the 16-bit USB product ID, in native byteorder
 326  *
 327  * Description:
 328  *     Given a USB vendor ID and product ID, return a pointer to
 329  *     the hid_blacklist entry associated with that device.
 330  *
 331  * Returns: pointer if quirk found, or NULL if no quirks found.
 332  */
 333 static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
 334                 const u16 idProduct)
 335 {
 336         const struct hid_blacklist *bl_entry = NULL;
 337         int n = 0;
 338
 339         for (; hid_blacklist[n].idVendor; n++)
 340                 if (hid_blacklist[n].idVendor == idVendor &&
 341                         (hid_blacklist[n].idProduct == (__u16) HID_ANY_ID ||
 342                                 hid_blacklist[n].idProduct == idProduct))
 343                         bl_entry = &hid_blacklist[n];
 344
 345         if (bl_entry != NULL)
 346                 dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
 347                                 bl_entry->quirks, bl_entry->idVendor,
 348                                 bl_entry->idProduct);
 349         return bl_entry;
 350 }
 351
 352 /**
 353  * usbhid_lookup_quirk: return any quirks associated with a USB HID device
 354  * @idVendor: the 16-bit USB vendor ID, in native byteorder
 355  * @idProduct: the 16-bit USB product ID, in native byteorder
 356  *
 357  * Description:
 358  *     Given a USB vendor ID and product ID, return any quirks associated
 359  *     with that device.
 360  *
 361  * Returns: a u32 quirks value.
 362  */
 363 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct)
 364 {
 365         u32 quirks = 0;
 366         const struct hid_blacklist *bl_entry = NULL;
 367
 368         /* NCR devices must not be queried for reports */
 369         if (idVendor == USB_VENDOR_ID_NCR &&
 370                         idProduct >= USB_DEVICE_ID_NCR_FIRST &&
 371                         idProduct <= USB_DEVICE_ID_NCR_LAST)
 372                         return HID_QUIRK_NO_INIT_REPORTS;
 373
 374         down_read(&dquirks_rwsem);
 375         bl_entry = usbhid_exists_dquirk(idVendor, idProduct);
 376         if (!bl_entry)
 377                 bl_entry = usbhid_exists_squirk(idVendor, idProduct);
 378         if (bl_entry)
 379                 quirks = bl_entry->quirks;
 380         up_read(&dquirks_rwsem);
 381
 382         return quirks;
 383 }
 384
 385 EXPORT_SYMBOL_GPL(usbhid_lookup_quirk);