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_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_ATEN, USB_DEVICE_ID_ATEN_CS682, 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_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
74 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN, HID_QUIRK_ALWAYS_POLL },
75 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_009B, HID_QUIRK_ALWAYS_POLL },
76 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_0103, HID_QUIRK_ALWAYS_POLL },
77 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_010c, HID_QUIRK_ALWAYS_POLL },
78 { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_016F, HID_QUIRK_ALWAYS_POLL },
79 { USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
80 { USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS },
81 { USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET },
82 { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0A4A, HID_QUIRK_ALWAYS_POLL },
83 { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_LOGITECH_OEM_USB_OPTICAL_MOUSE_0B4A, HID_QUIRK_ALWAYS_POLL },
84 { USB_VENDOR_ID_HP, USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
85 { USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C077, HID_QUIRK_ALWAYS_POLL },
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_TYPE_COVER_3, HID_QUIRK_NO_INIT_REPORTS },
91 { USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_TYPE_COVER_3_JP, HID_QUIRK_NO_INIT_REPORTS },
92 { USB_VENDOR_ID_MSI, USB_DEVICE_ID_MSI_GT683R_LED_PANEL, HID_QUIRK_NO_INIT_REPORTS },
93 { USB_VENDOR_ID_NEXIO, USB_DEVICE_ID_NEXIO_MULTITOUCH_PTI0750, HID_QUIRK_NO_INIT_REPORTS },
94 { USB_VENDOR_ID_NOVATEK, USB_DEVICE_ID_NOVATEK_MOUSE, HID_QUIRK_NO_INIT_REPORTS },
95 { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1610, HID_QUIRK_NOGET },
96 { USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1640, HID_QUIRK_NOGET },
97 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
98 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE_ID2, HID_QUIRK_ALWAYS_POLL },
99 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NO_INIT_REPORTS },
100 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1, HID_QUIRK_NO_INIT_REPORTS },
101 { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2, HID_QUIRK_NO_INIT_REPORTS },
102 { USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_MOUSE_4D22, HID_QUIRK_ALWAYS_POLL },
103 { USB_VENDOR_ID_PRODIGE, USB_DEVICE_ID_PRODIGE_CORDLESS, HID_QUIRK_NOGET },
104 { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001, HID_QUIRK_NOGET },
105 { USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008, HID_QUIRK_NOGET },
106 { USB_VENDOR_ID_REALTEK, USB_DEVICE_ID_REALTEK_READER, HID_QUIRK_NO_INIT_REPORTS },
107 { USB_VENDOR_ID_SENNHEISER, USB_DEVICE_ID_SENNHEISER_BTD500USB, HID_QUIRK_NOGET },
108 { USB_VENDOR_ID_SIGMATEL, USB_DEVICE_ID_SIGMATEL_STMP3780, HID_QUIRK_NOGET },
109 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS9200_TOUCH, HID_QUIRK_NOGET },
110 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS817_TOUCH, HID_QUIRK_NOGET },
111 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS_TS, HID_QUIRK_NO_INIT_REPORTS },
112 { USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS1030_TOUCH, HID_QUIRK_NOGET },
113 { USB_VENDOR_ID_SUN, USB_DEVICE_ID_RARITAN_KVM_DONGLE, HID_QUIRK_NOGET },
114 { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_1, HID_QUIRK_NOGET },
115 { USB_VENDOR_ID_SYMBOL, USB_DEVICE_ID_SYMBOL_SCANNER_2, HID_QUIRK_NOGET },
116 { USB_VENDOR_ID_TPV, USB_DEVICE_ID_TPV_OPTICAL_TOUCHSCREEN, HID_QUIRK_NOGET },
117 { USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_KEYBOARD, HID_QUIRK_NOGET },
118 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_KNA5, HID_QUIRK_MULTI_INPUT },
119 { USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWA60, HID_QUIRK_MULTI_INPUT },
120 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH, HID_QUIRK_MULTI_INPUT },
121 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH, HID_QUIRK_MULTI_INPUT },
122 { USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET, HID_QUIRK_MULTI_INPUT },
123 { USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_QUAD_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
124
125 { USB_VENDOR_ID_WISEGROUP_LTD2, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
126
127 { USB_VENDOR_ID_PI_ENGINEERING, USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL, HID_QUIRK_HIDINPUT_FORCE },
128
129 { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH, HID_QUIRK_MULTI_INPUT },
130 { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS, HID_QUIRK_MULTI_INPUT },
131 { USB_VENDOR_ID_SIGMA_MICRO, USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD, HID_QUIRK_NO_INIT_REPORTS },
132 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X, HID_QUIRK_MULTI_INPUT },
133 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X_2, HID_QUIRK_MULTI_INPUT },
134 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X, HID_QUIRK_MULTI_INPUT },
135 { USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_PENSKETCH_M912, HID_QUIRK_MULTI_INPUT },
136 { USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_DUOSENSE, HID_QUIRK_NO_INIT_REPORTS },
137 { USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD, HID_QUIRK_NO_INIT_REPORTS },
138 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS1, HID_QUIRK_NO_INIT_REPORTS },
139 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_LTS2, HID_QUIRK_NO_INIT_REPORTS },
140 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_HD, HID_QUIRK_NO_INIT_REPORTS },
141 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_QUAD_HD, HID_QUIRK_NO_INIT_REPORTS },
142 { USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP_V103, HID_QUIRK_NO_INIT_REPORTS },
143 { USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A096, HID_QUIRK_NO_INIT_INPUT_REPORTS },
144
145 { 0, 0 }
146 };
147
148 /* Dynamic HID quirks list - specified at runtime */
149 struct quirks_list_struct {
150 struct hid_blacklist hid_bl_item;
151 struct list_head node;
152 };
153
154 static LIST_HEAD(dquirks_list);
155 static DECLARE_RWSEM(dquirks_rwsem);
156
157 /* Runtime ("dynamic") quirks manipulation functions */
158
159 /**
160 * usbhid_exists_dquirk: find any dynamic quirks for a USB HID device
161 * @idVendor: the 16-bit USB vendor ID, in native byteorder
162 * @idProduct: the 16-bit USB product ID, in native byteorder
163 *
164 * Description:
165 * Scans dquirks_list for a matching dynamic quirk and returns
166 * the pointer to the relevant struct hid_blacklist if found.
167 * Must be called with a read lock held on dquirks_rwsem.
168 *
169 * Returns: NULL if no quirk found, struct hid_blacklist * if found.
170 */
usbhid_exists_dquirk(const u16 idVendor,const u16 idProduct)171 static struct hid_blacklist *usbhid_exists_dquirk(const u16 idVendor,
172 const u16 idProduct)
173 {
174 struct quirks_list_struct *q;
175 struct hid_blacklist *bl_entry = NULL;
176
177 list_for_each_entry(q, &dquirks_list, node) {
178 if (q->hid_bl_item.idVendor == idVendor &&
179 q->hid_bl_item.idProduct == idProduct) {
180 bl_entry = &q->hid_bl_item;
181 break;
182 }
183 }
184
185 if (bl_entry != NULL)
186 dbg_hid("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
187 bl_entry->quirks, bl_entry->idVendor,
188 bl_entry->idProduct);
189
190 return bl_entry;
191 }
192
193
194 /**
195 * usbhid_modify_dquirk: add/replace a HID quirk
196 * @idVendor: the 16-bit USB vendor ID, in native byteorder
197 * @idProduct: the 16-bit USB product ID, in native byteorder
198 * @quirks: the u32 quirks value to add/replace
199 *
200 * Description:
201 * If an dynamic quirk exists in memory for this (idVendor,
202 * idProduct) pair, replace its quirks value with what was
203 * provided. Otherwise, add the quirk to the dynamic quirks list.
204 *
205 * Returns: 0 OK, -error on failure.
206 */
usbhid_modify_dquirk(const u16 idVendor,const u16 idProduct,const u32 quirks)207 static int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct,
208 const u32 quirks)
209 {
210 struct quirks_list_struct *q_new, *q;
211 int list_edited = 0;
212
213 if (!idVendor) {
214 dbg_hid("Cannot add a quirk with idVendor = 0\n");
215 return -EINVAL;
216 }
217
218 q_new = kmalloc(sizeof(struct quirks_list_struct), GFP_KERNEL);
219 if (!q_new) {
220 dbg_hid("Could not allocate quirks_list_struct\n");
221 return -ENOMEM;
222 }
223
224 q_new->hid_bl_item.idVendor = idVendor;
225 q_new->hid_bl_item.idProduct = idProduct;
226 q_new->hid_bl_item.quirks = quirks;
227
228 down_write(&dquirks_rwsem);
229
230 list_for_each_entry(q, &dquirks_list, node) {
231
232 if (q->hid_bl_item.idVendor == idVendor &&
233 q->hid_bl_item.idProduct == idProduct) {
234
235 list_replace(&q->node, &q_new->node);
236 kfree(q);
237 list_edited = 1;
238 break;
239
240 }
241
242 }
243
244 if (!list_edited)
245 list_add_tail(&q_new->node, &dquirks_list);
246
247 up_write(&dquirks_rwsem);
248
249 return 0;
250 }
251
252 /**
253 * usbhid_remove_all_dquirks: remove all runtime HID quirks from memory
254 *
255 * Description:
256 * Free all memory associated with dynamic quirks - called before
257 * module unload.
258 *
259 */
usbhid_remove_all_dquirks(void)260 static void usbhid_remove_all_dquirks(void)
261 {
262 struct quirks_list_struct *q, *temp;
263
264 down_write(&dquirks_rwsem);
265 list_for_each_entry_safe(q, temp, &dquirks_list, node) {
266 list_del(&q->node);
267 kfree(q);
268 }
269 up_write(&dquirks_rwsem);
270
271 }
272
273 /**
274 * usbhid_quirks_init: apply USB HID quirks specified at module load time
275 */
usbhid_quirks_init(char ** quirks_param)276 int usbhid_quirks_init(char **quirks_param)
277 {
278 u16 idVendor, idProduct;
279 u32 quirks;
280 int n = 0, m;
281
282 for (; n < MAX_USBHID_BOOT_QUIRKS && quirks_param[n]; n++) {
283
284 m = sscanf(quirks_param[n], "0x%hx:0x%hx:0x%x",
285 &idVendor, &idProduct, &quirks);
286
287 if (m != 3 ||
288 usbhid_modify_dquirk(idVendor, idProduct, quirks) != 0) {
289 printk(KERN_WARNING
290 "Could not parse HID quirk module param %s\n",
291 quirks_param[n]);
292 }
293 }
294
295 return 0;
296 }
297
298 /**
299 * usbhid_quirks_exit: release memory associated with dynamic_quirks
300 *
301 * Description:
302 * Release all memory associated with dynamic quirks. Called upon
303 * module unload.
304 *
305 * Returns: nothing
306 */
usbhid_quirks_exit(void)307 void usbhid_quirks_exit(void)
308 {
309 usbhid_remove_all_dquirks();
310 }
311
312 /**
313 * usbhid_exists_squirk: return any static quirks for a USB HID device
314 * @idVendor: the 16-bit USB vendor ID, in native byteorder
315 * @idProduct: the 16-bit USB product ID, in native byteorder
316 *
317 * Description:
318 * Given a USB vendor ID and product ID, return a pointer to
319 * the hid_blacklist entry associated with that device.
320 *
321 * Returns: pointer if quirk found, or NULL if no quirks found.
322 */
usbhid_exists_squirk(const u16 idVendor,const u16 idProduct)323 static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
324 const u16 idProduct)
325 {
326 const struct hid_blacklist *bl_entry = NULL;
327 int n = 0;
328
329 for (; hid_blacklist[n].idVendor; n++)
330 if (hid_blacklist[n].idVendor == idVendor &&
331 hid_blacklist[n].idProduct == idProduct)
332 bl_entry = &hid_blacklist[n];
333
334 if (bl_entry != NULL)
335 dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
336 bl_entry->quirks, bl_entry->idVendor,
337 bl_entry->idProduct);
338 return bl_entry;
339 }
340
341 /**
342 * usbhid_lookup_quirk: return any quirks associated with a USB HID device
343 * @idVendor: the 16-bit USB vendor ID, in native byteorder
344 * @idProduct: the 16-bit USB product ID, in native byteorder
345 *
346 * Description:
347 * Given a USB vendor ID and product ID, return any quirks associated
348 * with that device.
349 *
350 * Returns: a u32 quirks value.
351 */
usbhid_lookup_quirk(const u16 idVendor,const u16 idProduct)352 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct)
353 {
354 u32 quirks = 0;
355 const struct hid_blacklist *bl_entry = NULL;
356
357 /* NCR devices must not be queried for reports */
358 if (idVendor == USB_VENDOR_ID_NCR &&
359 idProduct >= USB_DEVICE_ID_NCR_FIRST &&
360 idProduct <= USB_DEVICE_ID_NCR_LAST)
361 return HID_QUIRK_NO_INIT_REPORTS;
362
363 down_read(&dquirks_rwsem);
364 bl_entry = usbhid_exists_dquirk(idVendor, idProduct);
365 if (!bl_entry)
366 bl_entry = usbhid_exists_squirk(idVendor, idProduct);
367 if (bl_entry)
368 quirks = bl_entry->quirks;
369 up_read(&dquirks_rwsem);
370
371 return quirks;
372 }
373
374 EXPORT_SYMBOL_GPL(usbhid_lookup_quirk);
375