2 * Copyright (c) 1999 Andreas Gal
3 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Copyright (c) 2006-2007 Jiri Kosina
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * Should you need to contact me, the author, you can do so either by
22 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
23 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 #include <linux/types.h>
30 #include <linux/slab.h>
31 #include <linux/list.h>
32 #include <linux/mod_devicetable.h> /* hid_device_id */
33 #include <linux/timer.h>
34 #include <linux/workqueue.h>
35 #include <linux/input.h>
36 #include <linux/semaphore.h>
37 #include <linux/power_supply.h>
38 #include <uapi/linux/hid.h>
41 * We parse each description item into this structure. Short items data
42 * values are expanded to 32-bit signed int, long items contain a pointer
63 * HID report item format
66 #define HID_ITEM_FORMAT_SHORT 0
67 #define HID_ITEM_FORMAT_LONG 1
70 * Special tag indicating long items
73 #define HID_ITEM_TAG_LONG 15
76 * HID report descriptor item type (prefix bit 2,3)
79 #define HID_ITEM_TYPE_MAIN 0
80 #define HID_ITEM_TYPE_GLOBAL 1
81 #define HID_ITEM_TYPE_LOCAL 2
82 #define HID_ITEM_TYPE_RESERVED 3
85 * HID report descriptor main item tags
88 #define HID_MAIN_ITEM_TAG_INPUT 8
89 #define HID_MAIN_ITEM_TAG_OUTPUT 9
90 #define HID_MAIN_ITEM_TAG_FEATURE 11
91 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION 10
92 #define HID_MAIN_ITEM_TAG_END_COLLECTION 12
95 * HID report descriptor main item contents
98 #define HID_MAIN_ITEM_CONSTANT 0x001
99 #define HID_MAIN_ITEM_VARIABLE 0x002
100 #define HID_MAIN_ITEM_RELATIVE 0x004
101 #define HID_MAIN_ITEM_WRAP 0x008
102 #define HID_MAIN_ITEM_NONLINEAR 0x010
103 #define HID_MAIN_ITEM_NO_PREFERRED 0x020
104 #define HID_MAIN_ITEM_NULL_STATE 0x040
105 #define HID_MAIN_ITEM_VOLATILE 0x080
106 #define HID_MAIN_ITEM_BUFFERED_BYTE 0x100
109 * HID report descriptor collection item types
112 #define HID_COLLECTION_PHYSICAL 0
113 #define HID_COLLECTION_APPLICATION 1
114 #define HID_COLLECTION_LOGICAL 2
117 * HID report descriptor global item tags
120 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE 0
121 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM 1
122 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM 2
123 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM 3
124 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM 4
125 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT 5
126 #define HID_GLOBAL_ITEM_TAG_UNIT 6
127 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE 7
128 #define HID_GLOBAL_ITEM_TAG_REPORT_ID 8
129 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT 9
130 #define HID_GLOBAL_ITEM_TAG_PUSH 10
131 #define HID_GLOBAL_ITEM_TAG_POP 11
134 * HID report descriptor local item tags
137 #define HID_LOCAL_ITEM_TAG_USAGE 0
138 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM 1
139 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM 2
140 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX 3
141 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM 4
142 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM 5
143 #define HID_LOCAL_ITEM_TAG_STRING_INDEX 7
144 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM 8
145 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM 9
146 #define HID_LOCAL_ITEM_TAG_DELIMITER 10
152 #define HID_USAGE_PAGE 0xffff0000
154 #define HID_UP_UNDEFINED 0x00000000
155 #define HID_UP_GENDESK 0x00010000
156 #define HID_UP_SIMULATION 0x00020000
157 #define HID_UP_GENDEVCTRLS 0x00060000
158 #define HID_UP_KEYBOARD 0x00070000
159 #define HID_UP_LED 0x00080000
160 #define HID_UP_BUTTON 0x00090000
161 #define HID_UP_ORDINAL 0x000a0000
162 #define HID_UP_CONSUMER 0x000c0000
163 #define HID_UP_DIGITIZER 0x000d0000
164 #define HID_UP_PID 0x000f0000
165 #define HID_UP_HPVENDOR 0xff7f0000
166 #define HID_UP_HPVENDOR2 0xff010000
167 #define HID_UP_MSVENDOR 0xff000000
168 #define HID_UP_CUSTOM 0x00ff0000
169 #define HID_UP_LOGIVENDOR 0xffbc0000
170 #define HID_UP_LNVENDOR 0xffa00000
171 #define HID_UP_SENSOR 0x00200000
173 #define HID_USAGE 0x0000ffff
175 #define HID_GD_POINTER 0x00010001
176 #define HID_GD_MOUSE 0x00010002
177 #define HID_GD_JOYSTICK 0x00010004
178 #define HID_GD_GAMEPAD 0x00010005
179 #define HID_GD_KEYBOARD 0x00010006
180 #define HID_GD_KEYPAD 0x00010007
181 #define HID_GD_MULTIAXIS 0x00010008
182 #define HID_GD_X 0x00010030
183 #define HID_GD_Y 0x00010031
184 #define HID_GD_Z 0x00010032
185 #define HID_GD_RX 0x00010033
186 #define HID_GD_RY 0x00010034
187 #define HID_GD_RZ 0x00010035
188 #define HID_GD_SLIDER 0x00010036
189 #define HID_GD_DIAL 0x00010037
190 #define HID_GD_WHEEL 0x00010038
191 #define HID_GD_HATSWITCH 0x00010039
192 #define HID_GD_BUFFER 0x0001003a
193 #define HID_GD_BYTECOUNT 0x0001003b
194 #define HID_GD_MOTION 0x0001003c
195 #define HID_GD_START 0x0001003d
196 #define HID_GD_SELECT 0x0001003e
197 #define HID_GD_VX 0x00010040
198 #define HID_GD_VY 0x00010041
199 #define HID_GD_VZ 0x00010042
200 #define HID_GD_VBRX 0x00010043
201 #define HID_GD_VBRY 0x00010044
202 #define HID_GD_VBRZ 0x00010045
203 #define HID_GD_VNO 0x00010046
204 #define HID_GD_FEATURE 0x00010047
205 #define HID_GD_SYSTEM_CONTROL 0x00010080
206 #define HID_GD_UP 0x00010090
207 #define HID_GD_DOWN 0x00010091
208 #define HID_GD_RIGHT 0x00010092
209 #define HID_GD_LEFT 0x00010093
211 #define HID_DC_BATTERYSTRENGTH 0x00060020
213 #define HID_CP_CONSUMER_CONTROL 0x000c0001
215 #define HID_DG_DIGITIZER 0x000d0001
216 #define HID_DG_PEN 0x000d0002
217 #define HID_DG_LIGHTPEN 0x000d0003
218 #define HID_DG_TOUCHSCREEN 0x000d0004
219 #define HID_DG_TOUCHPAD 0x000d0005
220 #define HID_DG_STYLUS 0x000d0020
221 #define HID_DG_PUCK 0x000d0021
222 #define HID_DG_FINGER 0x000d0022
223 #define HID_DG_TIPPRESSURE 0x000d0030
224 #define HID_DG_BARRELPRESSURE 0x000d0031
225 #define HID_DG_INRANGE 0x000d0032
226 #define HID_DG_TOUCH 0x000d0033
227 #define HID_DG_UNTOUCH 0x000d0034
228 #define HID_DG_TAP 0x000d0035
229 #define HID_DG_TABLETFUNCTIONKEY 0x000d0039
230 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
231 #define HID_DG_INVERT 0x000d003c
232 #define HID_DG_TIPSWITCH 0x000d0042
233 #define HID_DG_TIPSWITCH2 0x000d0043
234 #define HID_DG_BARRELSWITCH 0x000d0044
235 #define HID_DG_ERASER 0x000d0045
236 #define HID_DG_TABLETPICK 0x000d0046
237 #define HID_DG_CONFIDENCE 0x000d0047
238 #define HID_DG_WIDTH 0x000d0048
239 #define HID_DG_HEIGHT 0x000d0049
240 #define HID_DG_CONTACTID 0x000d0051
241 #define HID_DG_INPUTMODE 0x000d0052
242 #define HID_DG_DEVICEINDEX 0x000d0053
243 #define HID_DG_CONTACTCOUNT 0x000d0054
244 #define HID_DG_CONTACTMAX 0x000d0055
245 #define HID_DG_BARRELSWITCH2 0x000d005a
246 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
249 * HID report types --- Ouch! HID spec says 1 2 3!
252 #define HID_INPUT_REPORT 0
253 #define HID_OUTPUT_REPORT 1
254 #define HID_FEATURE_REPORT 2
256 #define HID_REPORT_TYPES 3
259 * HID connect requests
262 #define HID_CONNECT_HIDINPUT 0x01
263 #define HID_CONNECT_HIDINPUT_FORCE 0x02
264 #define HID_CONNECT_HIDRAW 0x04
265 #define HID_CONNECT_HIDDEV 0x08
266 #define HID_CONNECT_HIDDEV_FORCE 0x10
267 #define HID_CONNECT_FF 0x20
268 #define HID_CONNECT_DRIVER 0x40
269 #define HID_CONNECT_DEFAULT (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
270 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
277 * Increase this if you need to configure more HID quirks at module load time
279 #define MAX_USBHID_BOOT_QUIRKS 4
281 #define HID_QUIRK_INVERT 0x00000001
282 #define HID_QUIRK_NOTOUCH 0x00000002
283 #define HID_QUIRK_IGNORE 0x00000004
284 #define HID_QUIRK_NOGET 0x00000008
285 #define HID_QUIRK_HIDDEV_FORCE 0x00000010
286 #define HID_QUIRK_BADPAD 0x00000020
287 #define HID_QUIRK_MULTI_INPUT 0x00000040
288 #define HID_QUIRK_HIDINPUT_FORCE 0x00000080
289 #define HID_QUIRK_NO_EMPTY_INPUT 0x00000100
290 #define HID_QUIRK_NO_INIT_INPUT_REPORTS 0x00000200
291 #define HID_QUIRK_ALWAYS_POLL 0x00000400
292 #define HID_QUIRK_SKIP_OUTPUT_REPORTS 0x00010000
293 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID 0x00020000
294 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP 0x00040000
295 #define HID_QUIRK_FULLSPEED_INTERVAL 0x10000000
296 #define HID_QUIRK_NO_INIT_REPORTS 0x20000000
297 #define HID_QUIRK_NO_IGNORE 0x40000000
298 #define HID_QUIRK_NO_INPUT_SYNC 0x80000000
303 * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
304 * and has a value of 0x0000
306 #define HID_GROUP_GENERIC 0x0001
307 #define HID_GROUP_MULTITOUCH 0x0002
308 #define HID_GROUP_SENSOR_HUB 0x0003
309 #define HID_GROUP_MULTITOUCH_WIN_8 0x0004
312 * Vendor specific HID device groups
314 #define HID_GROUP_RMI 0x0100
315 #define HID_GROUP_WACOM 0x0101
318 * This is the global environment of the parser. This information is
319 * persistent for main-items. The global environment can be saved and
320 * restored with PUSH/POP statements.
325 __s32 logical_minimum;
326 __s32 logical_maximum;
327 __s32 physical_minimum;
328 __s32 physical_maximum;
332 unsigned report_size;
333 unsigned report_count;
337 * This is the local environment. It is persistent up the next main-item.
340 #define HID_MAX_USAGES 12288
341 #define HID_DEFAULT_NUM_COLLECTIONS 16
344 unsigned usage[HID_MAX_USAGES]; /* usage array */
345 unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
346 unsigned usage_index;
347 unsigned usage_minimum;
348 unsigned delimiter_depth;
349 unsigned delimiter_branch;
353 * This is the collection stack. We climb up the stack to determine
354 * application and function of each field.
357 struct hid_collection {
364 unsigned hid; /* hid usage code */
365 unsigned collection_index; /* index into collection array */
366 unsigned usage_index; /* index into usage array */
368 __u16 code; /* input driver code */
369 __u8 type; /* input driver type */
370 __s8 hat_min; /* hat switch fun */
371 __s8 hat_max; /* ditto */
372 __s8 hat_dir; /* ditto */
378 unsigned physical; /* physical usage for this field */
379 unsigned logical; /* logical usage for this field */
380 unsigned application; /* application usage for this field */
381 struct hid_usage *usage; /* usage table for this function */
382 unsigned maxusage; /* maximum usage index */
383 unsigned flags; /* main-item flags (i.e. volatile,array,constant) */
384 unsigned report_offset; /* bit offset in the report */
385 unsigned report_size; /* size of this field in the report */
386 unsigned report_count; /* number of this field in the report */
387 unsigned report_type; /* (input,output,feature) */
388 __s32 *value; /* last known value(s) */
389 __s32 logical_minimum;
390 __s32 logical_maximum;
391 __s32 physical_minimum;
392 __s32 physical_maximum;
395 struct hid_report *report; /* associated report */
396 unsigned index; /* index into report->field[] */
398 struct hid_input *hidinput; /* associated input structure */
399 __u16 dpad; /* dpad input code */
402 #define HID_MAX_FIELDS 256
405 struct list_head list;
406 unsigned id; /* id of this report */
407 unsigned type; /* report type */
408 struct hid_field *field[HID_MAX_FIELDS]; /* fields of the report */
409 unsigned maxfield; /* maximum valid field index */
410 unsigned size; /* size of the report (bits) */
411 struct hid_device *device; /* associated device */
414 #define HID_MAX_IDS 256
416 struct hid_report_enum {
418 struct list_head report_list;
419 struct hid_report *report_id_hash[HID_MAX_IDS];
422 #define HID_MIN_BUFFER_SIZE 64 /* make sure there is at least a packet size of space */
423 #define HID_MAX_BUFFER_SIZE 4096 /* 4kb */
424 #define HID_CONTROL_FIFO_SIZE 256 /* to init devices with >100 reports */
425 #define HID_OUTPUT_FIFO_SIZE 64
427 struct hid_control_fifo {
429 struct hid_report *report;
433 struct hid_output_fifo {
434 struct hid_report *report;
438 #define HID_CLAIMED_INPUT 1
439 #define HID_CLAIMED_HIDDEV 2
440 #define HID_CLAIMED_HIDRAW 4
441 #define HID_CLAIMED_DRIVER 8
443 #define HID_STAT_ADDED 1
444 #define HID_STAT_PARSED 2
447 struct list_head list;
448 struct hid_report *report;
449 struct input_dev *input;
459 struct hid_ll_driver;
461 struct hid_device { /* device report descriptor */
466 struct hid_collection *collection; /* List of HID collections */
467 unsigned collection_size; /* Number of allocated hid_collections */
468 unsigned maxcollection; /* Number of parsed collections */
469 unsigned maxapplication; /* Number of applications */
470 __u16 bus; /* BUS ID */
471 __u16 group; /* Report group */
472 __u32 vendor; /* Vendor ID */
473 __u32 product; /* Product ID */
474 __u32 version; /* HID version */
475 enum hid_type type; /* device type (mouse, kbd, ...) */
476 unsigned country; /* HID country */
477 struct hid_report_enum report_enum[HID_REPORT_TYPES];
478 struct work_struct led_work; /* delayed LED worker */
480 struct semaphore driver_lock; /* protects the current driver, except during input */
481 struct semaphore driver_input_lock; /* protects the current driver */
482 struct device dev; /* device */
483 struct hid_driver *driver;
484 struct hid_ll_driver *ll_driver;
486 #ifdef CONFIG_HID_BATTERY_STRENGTH
488 * Power supply information for HID devices which report
489 * battery strength. power_supply is registered iff
490 * battery.name is non-NULL.
492 struct power_supply battery;
495 __s32 battery_report_type;
496 __s32 battery_report_id;
499 unsigned int status; /* see STAT flags above */
500 unsigned claimed; /* Claimed by hidinput, hiddev? */
501 unsigned quirks; /* Various quirks the device can pull on us */
502 bool io_started; /* Protected by driver_lock. If IO has started */
504 struct list_head inputs; /* The list of inputs */
505 void *hiddev; /* The hiddev structure */
507 int minor; /* Hiddev minor number */
509 int open; /* is the device open by anyone? */
510 char name[128]; /* Device name */
511 char phys[64]; /* Device physical location */
512 char uniq[64]; /* Device unique identifier (serial #) */
516 /* temporary hid_ff handling (until moved to the drivers) */
517 int (*ff_init)(struct hid_device *);
519 /* hiddev event handler */
520 int (*hiddev_connect)(struct hid_device *, unsigned int);
521 void (*hiddev_disconnect)(struct hid_device *);
522 void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
523 struct hid_usage *, __s32);
524 void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
526 /* debugging support via debugfs */
527 unsigned short debug;
528 struct dentry *debug_dir;
529 struct dentry *debug_rdesc;
530 struct dentry *debug_events;
531 struct list_head debug_list;
532 spinlock_t debug_list_lock;
533 wait_queue_head_t debug_wait;
536 static inline void *hid_get_drvdata(struct hid_device *hdev)
538 return dev_get_drvdata(&hdev->dev);
541 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
543 dev_set_drvdata(&hdev->dev, data);
546 #define HID_GLOBAL_STACK_SIZE 4
547 #define HID_COLLECTION_STACK_SIZE 4
549 #define HID_SCAN_FLAG_MT_WIN_8 0x00000001
552 struct hid_global global;
553 struct hid_global global_stack[HID_GLOBAL_STACK_SIZE];
554 unsigned global_stack_ptr;
555 struct hid_local local;
556 unsigned collection_stack[HID_COLLECTION_STACK_SIZE];
557 unsigned collection_stack_ptr;
558 struct hid_device *device;
562 struct hid_class_descriptor {
563 __u8 bDescriptorType;
564 __le16 wDescriptorLength;
565 } __attribute__ ((packed));
567 struct hid_descriptor {
569 __u8 bDescriptorType;
572 __u8 bNumDescriptors;
574 struct hid_class_descriptor desc[1];
575 } __attribute__ ((packed));
577 #define HID_DEVICE(b, g, ven, prod) \
578 .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
579 #define HID_USB_DEVICE(ven, prod) \
580 .bus = BUS_USB, .vendor = (ven), .product = (prod)
581 #define HID_BLUETOOTH_DEVICE(ven, prod) \
582 .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
583 #define HID_I2C_DEVICE(ven, prod) \
584 .bus = BUS_I2C, .vendor = (ven), .product = (prod)
586 #define HID_REPORT_ID(rep) \
588 #define HID_USAGE_ID(uhid, utype, ucode) \
589 .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
590 /* we don't want to catch types and codes equal to 0 */
591 #define HID_TERMINATOR (HID_ANY_ID - 1)
593 struct hid_report_id {
596 struct hid_usage_id {
604 * @name: driver name (e.g. "Footech_bar-wheel")
605 * @id_table: which devices is this driver for (must be non-NULL for probe
607 * @dyn_list: list of dynamically added device ids
608 * @dyn_lock: lock protecting @dyn_list
609 * @probe: new device inserted
610 * @remove: device removed (NULL if not a hot-plug capable driver)
611 * @report_table: on which reports to call raw_event (NULL means all)
612 * @raw_event: if report in report_table, this hook is called (NULL means nop)
613 * @usage_table: on which events to call event (NULL means all)
614 * @event: if usage in usage_table, this hook is called (NULL means nop)
615 * @report: this hook is called after parsing a report (NULL means nop)
616 * @report_fixup: called before report descriptor parsing (NULL means nop)
617 * @input_mapping: invoked on input registering before mapping an usage
618 * @input_mapped: invoked on input registering after mapping an usage
619 * @input_configured: invoked just before the device is registered
620 * @feature_mapping: invoked on feature registering
621 * @suspend: invoked on suspend (NULL means nop)
622 * @resume: invoked on resume if device was not reset (NULL means nop)
623 * @reset_resume: invoked on resume if device was reset (NULL means nop)
625 * probe should return -errno on error, or 0 on success. During probe,
626 * input will not be passed to raw_event unless hid_device_io_start is
629 * raw_event and event should return 0 on no action performed, 1 when no
630 * further processing should be done and negative on error
632 * input_mapping shall return a negative value to completely ignore this usage
633 * (e.g. doubled or invalid usage), zero to continue with parsing of this
634 * usage by generic code (no special handling needed) or positive to skip
635 * generic parsing (needed special handling which was done in the hook already)
636 * input_mapped shall return negative to inform the layer that this usage
637 * should not be considered for further processing or zero to notify that
638 * no processing was performed and should be done in a generic manner
639 * Both these functions may be NULL which means the same behavior as returning
644 const struct hid_device_id *id_table;
646 struct list_head dyn_list;
649 int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
650 void (*remove)(struct hid_device *dev);
652 const struct hid_report_id *report_table;
653 int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
655 const struct hid_usage_id *usage_table;
656 int (*event)(struct hid_device *hdev, struct hid_field *field,
657 struct hid_usage *usage, __s32 value);
658 void (*report)(struct hid_device *hdev, struct hid_report *report);
660 __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
663 int (*input_mapping)(struct hid_device *hdev,
664 struct hid_input *hidinput, struct hid_field *field,
665 struct hid_usage *usage, unsigned long **bit, int *max);
666 int (*input_mapped)(struct hid_device *hdev,
667 struct hid_input *hidinput, struct hid_field *field,
668 struct hid_usage *usage, unsigned long **bit, int *max);
669 void (*input_configured)(struct hid_device *hdev,
670 struct hid_input *hidinput);
671 void (*feature_mapping)(struct hid_device *hdev,
672 struct hid_field *field,
673 struct hid_usage *usage);
675 int (*suspend)(struct hid_device *hdev, pm_message_t message);
676 int (*resume)(struct hid_device *hdev);
677 int (*reset_resume)(struct hid_device *hdev);
680 struct device_driver driver;
684 * hid_ll_driver - low level driver callbacks
685 * @start: called on probe to start the device
686 * @stop: called on remove
687 * @open: called by input layer on open
688 * @close: called by input layer on close
689 * @parse: this method is called only once to parse the device data,
690 * shouldn't allocate anything to not leak memory
691 * @request: send report request to device (e.g. feature report)
692 * @wait: wait for buffered io to complete (send/recv reports)
693 * @raw_request: send raw report request to device (e.g. feature report)
694 * @output_report: send output report to device
695 * @idle: send idle request to device
697 struct hid_ll_driver {
698 int (*start)(struct hid_device *hdev);
699 void (*stop)(struct hid_device *hdev);
701 int (*open)(struct hid_device *hdev);
702 void (*close)(struct hid_device *hdev);
704 int (*power)(struct hid_device *hdev, int level);
706 int (*parse)(struct hid_device *hdev);
708 void (*request)(struct hid_device *hdev,
709 struct hid_report *report, int reqtype);
711 int (*wait)(struct hid_device *hdev);
713 int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
714 __u8 *buf, size_t len, unsigned char rtype,
717 int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
719 int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
722 #define PM_HINT_FULLON 1<<5
723 #define PM_HINT_NORMAL 1<<1
725 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
726 /* We ignore a few input applications that are not widely used */
727 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
731 extern int hid_debug;
733 extern bool hid_ignore(struct hid_device *);
734 extern int hid_add_device(struct hid_device *);
735 extern void hid_destroy_device(struct hid_device *);
737 extern int __must_check __hid_register_driver(struct hid_driver *,
738 struct module *, const char *mod_name);
740 /* use a define to avoid include chaining to get THIS_MODULE & friends */
741 #define hid_register_driver(driver) \
742 __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
744 extern void hid_unregister_driver(struct hid_driver *);
747 * module_hid_driver() - Helper macro for registering a HID driver
748 * @__hid_driver: hid_driver struct
750 * Helper macro for HID drivers which do not do anything special in module
751 * init/exit. This eliminates a lot of boilerplate. Each module may only
752 * use this macro once, and calling it replaces module_init() and module_exit()
754 #define module_hid_driver(__hid_driver) \
755 module_driver(__hid_driver, hid_register_driver, \
756 hid_unregister_driver)
758 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
759 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
760 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
761 extern void hidinput_disconnect(struct hid_device *);
763 int hid_set_field(struct hid_field *, unsigned, __s32);
764 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
765 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
766 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
767 unsigned int hidinput_count_leds(struct hid_device *hid);
768 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
769 void hid_output_report(struct hid_report *report, __u8 *data);
770 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
771 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
772 struct hid_device *hid_allocate_device(void);
773 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
774 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
775 struct hid_report *hid_validate_values(struct hid_device *hid,
776 unsigned int type, unsigned int id,
777 unsigned int field_index,
778 unsigned int report_counts);
779 int hid_open_report(struct hid_device *device);
780 int hid_check_keys_pressed(struct hid_device *hid);
781 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
782 void hid_disconnect(struct hid_device *hid);
783 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
784 const struct hid_device_id *id);
785 s32 hid_snto32(__u32 value, unsigned n);
788 * hid_device_io_start - enable HID input during probe, remove
792 * This should only be called during probe or remove and only be
793 * called by the thread calling probe or remove. It will allow
794 * incoming packets to be delivered to the driver.
796 static inline void hid_device_io_start(struct hid_device *hid) {
797 if (hid->io_started) {
798 dev_warn(&hid->dev, "io already started");
801 hid->io_started = true;
802 up(&hid->driver_input_lock);
806 * hid_device_io_stop - disable HID input during probe, remove
810 * Should only be called after hid_device_io_start. It will prevent
811 * incoming packets from going to the driver for the duration of
812 * probe, remove. If called during probe, packets will still go to the
813 * driver after probe is complete. This function should only be called
814 * by the thread calling probe or remove.
816 static inline void hid_device_io_stop(struct hid_device *hid) {
817 if (!hid->io_started) {
818 dev_warn(&hid->dev, "io already stopped");
821 hid->io_started = false;
822 down(&hid->driver_input_lock);
826 * hid_map_usage - map usage input bits
828 * @hidinput: hidinput which we are interested in
829 * @usage: usage to fill in
830 * @bit: pointer to input->{}bit (out parameter)
831 * @max: maximal valid usage->code to consider later (out parameter)
832 * @type: input event type (EV_KEY, EV_REL, ...)
833 * @c: code which corresponds to this usage and type
835 static inline void hid_map_usage(struct hid_input *hidinput,
836 struct hid_usage *usage, unsigned long **bit, int *max,
839 struct input_dev *input = hidinput->input;
846 *bit = input->absbit;
850 *bit = input->relbit;
854 *bit = input->keybit;
858 *bit = input->ledbit;
865 * hid_map_usage_clear - map usage input bits and clear the input bit
867 * The same as hid_map_usage, except the @c bit is also cleared in supported
870 static inline void hid_map_usage_clear(struct hid_input *hidinput,
871 struct hid_usage *usage, unsigned long **bit, int *max,
874 hid_map_usage(hidinput, usage, bit, max, type, c);
879 * hid_parse - parse HW reports
883 * Call this from probe after you set up the device (if needed). Your
884 * report_fixup will be called (if non-NULL) after reading raw report from
885 * device before passing it to hid layer for real parsing.
887 static inline int __must_check hid_parse(struct hid_device *hdev)
889 return hid_open_report(hdev);
893 * hid_hw_start - start underlaying HW
896 * @connect_mask: which outputs to connect, see HID_CONNECT_*
898 * Call this in probe function *after* hid_parse. This will setup HW buffers
899 * and start the device (if not deffered to device open). hid_hw_stop must be
900 * called if this was successful.
902 static inline int __must_check hid_hw_start(struct hid_device *hdev,
903 unsigned int connect_mask)
905 int ret = hdev->ll_driver->start(hdev);
906 if (ret || !connect_mask)
908 ret = hid_connect(hdev, connect_mask);
910 hdev->ll_driver->stop(hdev);
915 * hid_hw_stop - stop underlaying HW
919 * This is usually called from remove function or from probe when something
920 * failed and hid_hw_start was called already.
922 static inline void hid_hw_stop(struct hid_device *hdev)
924 hid_disconnect(hdev);
925 hdev->ll_driver->stop(hdev);
929 * hid_hw_open - signal underlaying HW to start delivering events
933 * Tell underlying HW to start delivering events from the device.
934 * This function should be called sometime after successful call
935 * to hid_hiw_start().
937 static inline int __must_check hid_hw_open(struct hid_device *hdev)
939 return hdev->ll_driver->open(hdev);
943 * hid_hw_close - signal underlaying HW to stop delivering events
947 * This function indicates that we are not interested in the events
948 * from this device anymore. Delivery of events may or may not stop,
949 * depending on the number of users still outstanding.
951 static inline void hid_hw_close(struct hid_device *hdev)
953 hdev->ll_driver->close(hdev);
957 * hid_hw_power - requests underlying HW to go into given power mode
960 * @level: requested power level (one of %PM_HINT_* defines)
962 * This function requests underlying hardware to enter requested power
966 static inline int hid_hw_power(struct hid_device *hdev, int level)
968 return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
973 * hid_hw_request - send report request to device
976 * @report: report to send
977 * @reqtype: hid request type
979 static inline void hid_hw_request(struct hid_device *hdev,
980 struct hid_report *report, int reqtype)
982 if (hdev->ll_driver->request)
983 return hdev->ll_driver->request(hdev, report, reqtype);
985 __hid_request(hdev, report, reqtype);
989 * hid_hw_raw_request - send report request to device
992 * @reportnum: report ID
993 * @buf: in/out data to transfer
994 * @len: length of buf
995 * @rtype: HID report type
996 * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
998 * @return: count of data transfered, negative if error
1000 * Same behavior as hid_hw_request, but with raw buffers instead.
1002 static inline int hid_hw_raw_request(struct hid_device *hdev,
1003 unsigned char reportnum, __u8 *buf,
1004 size_t len, unsigned char rtype, int reqtype)
1006 if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1009 return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1014 * hid_hw_output_report - send output report to device
1017 * @buf: raw data to transfer
1018 * @len: length of buf
1020 * @return: count of data transfered, negative if error
1022 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1025 if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1028 if (hdev->ll_driver->output_report)
1029 return hdev->ll_driver->output_report(hdev, buf, len);
1035 * hid_hw_idle - send idle request to device
1038 * @report: report to control
1040 * @reqtype: hid request type
1042 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1045 if (hdev->ll_driver->idle)
1046 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1052 * hid_hw_wait - wait for buffered io to complete
1056 static inline void hid_hw_wait(struct hid_device *hdev)
1058 if (hdev->ll_driver->wait)
1059 hdev->ll_driver->wait(hdev);
1062 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1065 /* HID quirks API */
1066 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
1067 int usbhid_quirks_init(char **quirks_param);
1068 void usbhid_quirks_exit(void);
1070 #ifdef CONFIG_HID_PID
1071 int hid_pidff_init(struct hid_device *hid);
1073 #define hid_pidff_init NULL
1076 #define dbg_hid(format, arg...) \
1079 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg); \
1082 #define hid_printk(level, hid, fmt, arg...) \
1083 dev_printk(level, &(hid)->dev, fmt, ##arg)
1084 #define hid_emerg(hid, fmt, arg...) \
1085 dev_emerg(&(hid)->dev, fmt, ##arg)
1086 #define hid_crit(hid, fmt, arg...) \
1087 dev_crit(&(hid)->dev, fmt, ##arg)
1088 #define hid_alert(hid, fmt, arg...) \
1089 dev_alert(&(hid)->dev, fmt, ##arg)
1090 #define hid_err(hid, fmt, arg...) \
1091 dev_err(&(hid)->dev, fmt, ##arg)
1092 #define hid_notice(hid, fmt, arg...) \
1093 dev_notice(&(hid)->dev, fmt, ##arg)
1094 #define hid_warn(hid, fmt, arg...) \
1095 dev_warn(&(hid)->dev, fmt, ##arg)
1096 #define hid_info(hid, fmt, arg...) \
1097 dev_info(&(hid)->dev, fmt, ##arg)
1098 #define hid_dbg(hid, fmt, arg...) \
1099 dev_dbg(&(hid)->dev, fmt, ##arg)