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 28static 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_PLAYDOTCOM, USB_DEVICE_ID_PLAYDOTCOM_EMS_USBII, HID_QUIRK_MULTI_INPUT }, 56 { USB_VENDOR_ID_TOUCHPACK, USB_DEVICE_ID_TOUCHPACK_RTS, HID_QUIRK_MULTI_INPUT }, 57 58 { USB_VENDOR_ID_AIREN, USB_DEVICE_ID_AIREN_SLIMPLUS, HID_QUIRK_NOGET }, 59 { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM, HID_QUIRK_NOGET }, 60 { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS124U, HID_QUIRK_NOGET }, 61 { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET }, 62 { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET }, 63 { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET }, 64 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FIGHTERSTICK, HID_QUIRK_NOGET }, 65 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_COMBATSTICK, HID_QUIRK_NOGET }, 66 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FLIGHT_SIM_ECLIPSE_YOKE, HID_QUIRK_NOGET }, 67 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_FLIGHT_SIM_YOKE, HID_QUIRK_NOGET }, 68 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_PRO_THROTTLE, HID_QUIRK_NOGET }, 69 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_PRO_PEDALS, HID_QUIRK_NOGET }, 70 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_3AXIS_5BUTTON_STICK, HID_QUIRK_NOGET }, 71 { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_AXIS_295, HID_QUIRK_NOGET }, 72 { USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET }, 73 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN, HID_QUIRK_ALWAYS_POLL }, 74 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_009B, HID_QUIRK_ALWAYS_POLL }, 75 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_0103, HID_QUIRK_ALWAYS_POLL }, 76 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_016F, HID_QUIRK_ALWAYS_POLL }, 77 { USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET }, 78 { USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS }, 79 { USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET }, 80 { USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS, HID_QUIRK_NOGET }, 81 { USB_VENDOR_ID_MSI, USB_DEVICE_ID_MSI_GT683R_LED_PANEL, HID_QUIRK_NO_INIT_REPORTS }, 82 { USB_VENDOR_ID_NEXIO, USB_DEVICE_ID_NEXIO_MULTITOUCH_PTI0750, HID_QUIRK_NO_INIT_REPORTS }, 83 { USB_VENDOR_ID_NOVATEK, USB_DEVICE_ID_NOVATEK_MOUSE, HID_QUIRK_NO_INIT_REPORTS }, 84 { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1610, HID_QUIRK_NOGET }, 85 { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1640, HID_QUIRK_NOGET }, 86 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL }, 87 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE_ID2, HID_QUIRK_ALWAYS_POLL }, 88 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NO_INIT_REPORTS }, 89 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1, HID_QUIRK_NO_INIT_REPORTS }, 90 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2, HID_QUIRK_NO_INIT_REPORTS }, 91 { USB_VENDOR_ID_PRODIGE, USB_DEVICE_ID_PRODIGE_CORDLESS, HID_QUIRK_NOGET }, 92 { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001, HID_QUIRK_NOGET }, 93 { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008, HID_QUIRK_NOGET }, 94 { USB_VENDOR_ID_REALTEK, USB_DEVICE_ID_REALTEK_READER, HID_QUIRK_NO_INIT_REPORTS }, 95 { USB_VENDOR_ID_SENNHEISER, USB_DEVICE_ID_SENNHEISER_BTD500USB, HID_QUIRK_NOGET }, 96 { USB_VENDOR_ID_SIGMATEL, USB_DEVICE_ID_SIGMATEL_STMP3780, HID_QUIRK_NOGET }, 97 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS9200_TOUCH, HID_QUIRK_NOGET }, 98 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS817_TOUCH, HID_QUIRK_NOGET }, 99 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS_TS, HID_QUIRK_NO_INIT_REPORTS }, 100 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS1030_TOUCH, HID_QUIRK_NOGET }, 101 { USB_VENDOR_ID_SUN, USB_DEVICE_ID_RARITAN_KVM_DONGLE, HID_QUIRK_NOGET }, 102 { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_1, HID_QUIRK_NOGET }, 103 { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_2, HID_QUIRK_NOGET }, 104 { USB_VENDOR_ID_TPV, USB_DEVICE_ID_TPV_OPTICAL_TOUCHSCREEN, HID_QUIRK_NOGET }, 105 { USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_KEYBOARD, HID_QUIRK_NOGET }, 106 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209, HID_QUIRK_MULTI_INPUT }, 107 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U, HID_QUIRK_MULTI_INPUT }, 108 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_KNA5, HID_QUIRK_MULTI_INPUT }, 109 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWA60, HID_QUIRK_MULTI_INPUT }, 110 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U, HID_QUIRK_MULTI_INPUT }, 111 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U, HID_QUIRK_MULTI_INPUT }, 112 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH, HID_QUIRK_MULTI_INPUT }, 113 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH, HID_QUIRK_MULTI_INPUT }, 114 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET, HID_QUIRK_MULTI_INPUT }, 115 { USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_QUAD_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT }, 116 117 { USB_VENDOR_ID_WISEGROUP_LTD2, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT }, 118 119 { USB_VENDOR_ID_PI_ENGINEERING, USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL, HID_QUIRK_HIDINPUT_FORCE }, 120 121 { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH, HID_QUIRK_MULTI_INPUT }, 122 { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS, HID_QUIRK_MULTI_INPUT }, 123 { USB_VENDOR_ID_SIGMA_MICRO, USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD, HID_QUIRK_NO_INIT_REPORTS }, 124 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X, HID_QUIRK_MULTI_INPUT }, 125 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X, HID_QUIRK_MULTI_INPUT }, 126 { USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_DUOSENSE, HID_QUIRK_NO_INIT_REPORTS }, 127 { USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD, HID_QUIRK_NO_INIT_REPORTS }, 128 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS1, HID_QUIRK_NO_INIT_REPORTS }, 129 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS2, HID_QUIRK_NO_INIT_REPORTS }, 130 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_HD, HID_QUIRK_NO_INIT_REPORTS }, 131 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_QUAD_HD, HID_QUIRK_NO_INIT_REPORTS }, 132 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP_V103, HID_QUIRK_NO_INIT_REPORTS }, 133 { USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A096, HID_QUIRK_NO_INIT_INPUT_REPORTS }, 134 135 { 0, 0 } 136}; 137 138/* Dynamic HID quirks list - specified at runtime */ 139struct quirks_list_struct { 140 struct hid_blacklist hid_bl_item; 141 struct list_head node; 142}; 143 144static LIST_HEAD(dquirks_list); 145static DECLARE_RWSEM(dquirks_rwsem); 146 147/* Runtime ("dynamic") quirks manipulation functions */ 148 149/** 150 * usbhid_exists_dquirk: find any dynamic quirks for a USB HID device 151 * @idVendor: the 16-bit USB vendor ID, in native byteorder 152 * @idProduct: the 16-bit USB product ID, in native byteorder 153 * 154 * Description: 155 * Scans dquirks_list for a matching dynamic quirk and returns 156 * the pointer to the relevant struct hid_blacklist if found. 157 * Must be called with a read lock held on dquirks_rwsem. 158 * 159 * Returns: NULL if no quirk found, struct hid_blacklist * if found. 160 */ 161static struct hid_blacklist *usbhid_exists_dquirk(const u16 idVendor, 162 const u16 idProduct) 163{ 164 struct quirks_list_struct *q; 165 struct hid_blacklist *bl_entry = NULL; 166 167 list_for_each_entry(q, &dquirks_list, node) { 168 if (q->hid_bl_item.idVendor == idVendor && 169 q->hid_bl_item.idProduct == idProduct) { 170 bl_entry = &q->hid_bl_item; 171 break; 172 } 173 } 174 175 if (bl_entry != NULL) 176 dbg_hid("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n", 177 bl_entry->quirks, bl_entry->idVendor, 178 bl_entry->idProduct); 179 180 return bl_entry; 181} 182 183 184/** 185 * usbhid_modify_dquirk: add/replace a HID quirk 186 * @idVendor: the 16-bit USB vendor ID, in native byteorder 187 * @idProduct: the 16-bit USB product ID, in native byteorder 188 * @quirks: the u32 quirks value to add/replace 189 * 190 * Description: 191 * If an dynamic quirk exists in memory for this (idVendor, 192 * idProduct) pair, replace its quirks value with what was 193 * provided. Otherwise, add the quirk to the dynamic quirks list. 194 * 195 * Returns: 0 OK, -error on failure. 196 */ 197static int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct, 198 const u32 quirks) 199{ 200 struct quirks_list_struct *q_new, *q; 201 int list_edited = 0; 202 203 if (!idVendor) { 204 dbg_hid("Cannot add a quirk with idVendor = 0\n"); 205 return -EINVAL; 206 } 207 208 q_new = kmalloc(sizeof(struct quirks_list_struct), GFP_KERNEL); 209 if (!q_new) { 210 dbg_hid("Could not allocate quirks_list_struct\n"); 211 return -ENOMEM; 212 } 213 214 q_new->hid_bl_item.idVendor = idVendor; 215 q_new->hid_bl_item.idProduct = idProduct; 216 q_new->hid_bl_item.quirks = quirks; 217 218 down_write(&dquirks_rwsem); 219 220 list_for_each_entry(q, &dquirks_list, node) { 221 222 if (q->hid_bl_item.idVendor == idVendor && 223 q->hid_bl_item.idProduct == idProduct) { 224 225 list_replace(&q->node, &q_new->node); 226 kfree(q); 227 list_edited = 1; 228 break; 229 230 } 231 232 } 233 234 if (!list_edited) 235 list_add_tail(&q_new->node, &dquirks_list); 236 237 up_write(&dquirks_rwsem); 238 239 return 0; 240} 241 242/** 243 * usbhid_remove_all_dquirks: remove all runtime HID quirks from memory 244 * 245 * Description: 246 * Free all memory associated with dynamic quirks - called before 247 * module unload. 248 * 249 */ 250static void usbhid_remove_all_dquirks(void) 251{ 252 struct quirks_list_struct *q, *temp; 253 254 down_write(&dquirks_rwsem); 255 list_for_each_entry_safe(q, temp, &dquirks_list, node) { 256 list_del(&q->node); 257 kfree(q); 258 } 259 up_write(&dquirks_rwsem); 260 261} 262 263/** 264 * usbhid_quirks_init: apply USB HID quirks specified at module load time 265 */ 266int usbhid_quirks_init(char **quirks_param) 267{ 268 u16 idVendor, idProduct; 269 u32 quirks; 270 int n = 0, m; 271 272 for (; n < MAX_USBHID_BOOT_QUIRKS && quirks_param[n]; n++) { 273 274 m = sscanf(quirks_param[n], "0x%hx:0x%hx:0x%x", 275 &idVendor, &idProduct, &quirks); 276 277 if (m != 3 || 278 usbhid_modify_dquirk(idVendor, idProduct, quirks) != 0) { 279 printk(KERN_WARNING 280 "Could not parse HID quirk module param %s\n", 281 quirks_param[n]); 282 } 283 } 284 285 return 0; 286} 287 288/** 289 * usbhid_quirks_exit: release memory associated with dynamic_quirks 290 * 291 * Description: 292 * Release all memory associated with dynamic quirks. Called upon 293 * module unload. 294 * 295 * Returns: nothing 296 */ 297void usbhid_quirks_exit(void) 298{ 299 usbhid_remove_all_dquirks(); 300} 301 302/** 303 * usbhid_exists_squirk: return any static quirks for a USB HID device 304 * @idVendor: the 16-bit USB vendor ID, in native byteorder 305 * @idProduct: the 16-bit USB product ID, in native byteorder 306 * 307 * Description: 308 * Given a USB vendor ID and product ID, return a pointer to 309 * the hid_blacklist entry associated with that device. 310 * 311 * Returns: pointer if quirk found, or NULL if no quirks found. 312 */ 313static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor, 314 const u16 idProduct) 315{ 316 const struct hid_blacklist *bl_entry = NULL; 317 int n = 0; 318 319 for (; hid_blacklist[n].idVendor; n++) 320 if (hid_blacklist[n].idVendor == idVendor && 321 hid_blacklist[n].idProduct == idProduct) 322 bl_entry = &hid_blacklist[n]; 323 324 if (bl_entry != NULL) 325 dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n", 326 bl_entry->quirks, bl_entry->idVendor, 327 bl_entry->idProduct); 328 return bl_entry; 329} 330 331/** 332 * usbhid_lookup_quirk: return any quirks associated with a USB HID device 333 * @idVendor: the 16-bit USB vendor ID, in native byteorder 334 * @idProduct: the 16-bit USB product ID, in native byteorder 335 * 336 * Description: 337 * Given a USB vendor ID and product ID, return any quirks associated 338 * with that device. 339 * 340 * Returns: a u32 quirks value. 341 */ 342u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct) 343{ 344 u32 quirks = 0; 345 const struct hid_blacklist *bl_entry = NULL; 346 347 /* NCR devices must not be queried for reports */ 348 if (idVendor == USB_VENDOR_ID_NCR && 349 idProduct >= USB_DEVICE_ID_NCR_FIRST && 350 idProduct <= USB_DEVICE_ID_NCR_LAST) 351 return HID_QUIRK_NO_INIT_REPORTS; 352 353 down_read(&dquirks_rwsem); 354 bl_entry = usbhid_exists_dquirk(idVendor, idProduct); 355 if (!bl_entry) 356 bl_entry = usbhid_exists_squirk(idVendor, idProduct); 357 if (bl_entry) 358 quirks = bl_entry->quirks; 359 up_read(&dquirks_rwsem); 360 361 return quirks; 362} 363 364EXPORT_SYMBOL_GPL(usbhid_lookup_quirk); 365