hid-input.c

linux 内核源代码

/*
 * $Id: hid-input.c,v 1.2 2002/04/23 00:59:25 rdamazio Exp $
 *
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *  Copyright (c) 2006-2007 Jiri Kosina
 *
 *  HID to Linux Input mapping
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <[e-mail]>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>

#include <linux/hid.h>
#include <linux/hid-debug.h>

static int hid_pb_fnmode = 1;
module_param_named(pb_fnmode, hid_pb_fnmode, int, 0644);
MODULE_PARM_DESC(pb_fnmode,
		"Mode of fn key on PowerBooks (0 = disabled, 1 = fkeyslast, 2 = fkeysfirst)");

#define unk	KEY_UNKNOWN

static const unsigned char hid_keyboard[256] = {
	  0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
	 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
	  4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
	 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
	 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
	105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
	 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
	191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
	115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
	122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
	150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
};

/* extended mapping for certain Logitech hardware (Logitech cordless desktop LX500) */
#define LOGITECH_EXPANDED_KEYMAP_SIZE 80
static int logitech_expanded_keymap[LOGITECH_EXPANDED_KEYMAP_SIZE] = {
	  0,216,  0,213,175,156,  0,  0,  0,  0,
	144,  0,  0,  0,  0,  0,  0,  0,  0,212,
	174,167,152,161,112,  0,  0,  0,154,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,183,184,185,186,187,
	188,189,190,191,192,193,194,  0,  0,  0
};

static const struct {
	__s32 x;
	__s32 y;
}  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

#define map_abs(c)	do { usage->code = c; usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX; } while (0)
#define map_rel(c)	do { usage->code = c; usage->type = EV_REL; bit = input->relbit; max = REL_MAX; } while (0)
#define map_key(c)	do { usage->code = c; usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX; } while (0)
#define map_led(c)	do { usage->code = c; usage->type = EV_LED; bit = input->ledbit; max = LED_MAX; } while (0)

#define map_abs_clear(c)	do { map_abs(c); clear_bit(c, bit); } while (0)
#define map_key_clear(c)	do { map_key(c); clear_bit(c, bit); } while (0)

/* hardware needing special handling due to colliding MSVENDOR page usages */
#define IS_CHICONY_TACTICAL_PAD(x) (x->vendor == 0x04f2 && device->product == 0x0418)
#define IS_MS_KB(x) (x->vendor == 0x045e && (x->product == 0x00db || x->product == 0x00f9))

#ifdef CONFIG_USB_HIDINPUT_POWERBOOK

struct hidinput_key_translation {
	u16 from;
	u16 to;
	u8 flags;
};

#define POWERBOOK_FLAG_FKEY 0x01

static struct hidinput_key_translation powerbook_fn_keys[] = {
	{ KEY_BACKSPACE, KEY_DELETE },
	{ KEY_F1,       KEY_BRIGHTNESSDOWN,     POWERBOOK_FLAG_FKEY },
	{ KEY_F2,       KEY_BRIGHTNESSUP,       POWERBOOK_FLAG_FKEY },
	{ KEY_F3,       KEY_MUTE,               POWERBOOK_FLAG_FKEY },
	{ KEY_F4,       KEY_VOLUMEDOWN,         POWERBOOK_FLAG_FKEY },
	{ KEY_F5,       KEY_VOLUMEUP,           POWERBOOK_FLAG_FKEY },
	{ KEY_F6,       KEY_NUMLOCK,            POWERBOOK_FLAG_FKEY },
	{ KEY_F7,       KEY_SWITCHVIDEOMODE,    POWERBOOK_FLAG_FKEY },
	{ KEY_F8,       KEY_KBDILLUMTOGGLE,     POWERBOOK_FLAG_FKEY },
	{ KEY_F9,       KEY_KBDILLUMDOWN,       POWERBOOK_FLAG_FKEY },
	{ KEY_F10,      KEY_KBDILLUMUP,         POWERBOOK_FLAG_FKEY },
	{ KEY_UP,       KEY_PAGEUP },
	{ KEY_DOWN,     KEY_PAGEDOWN },
	{ KEY_LEFT,     KEY_HOME },
	{ KEY_RIGHT,    KEY_END },
	{ }
};

static struct hidinput_key_translation powerbook_numlock_keys[] = {
	{ KEY_J,        KEY_KP1 },
	{ KEY_K,        KEY_KP2 },
	{ KEY_L,        KEY_KP3 },
	{ KEY_U,        KEY_KP4 },
	{ KEY_I,        KEY_KP5 },
	{ KEY_O,        KEY_KP6 },
	{ KEY_7,        KEY_KP7 },
	{ KEY_8,        KEY_KP8 },
	{ KEY_9,        KEY_KP9 },
	{ KEY_M,        KEY_KP0 },
	{ KEY_DOT,      KEY_KPDOT },
	{ KEY_SLASH,    KEY_KPPLUS },
	{ KEY_SEMICOLON, KEY_KPMINUS },
	{ KEY_P,        KEY_KPASTERISK },
	{ KEY_MINUS,    KEY_KPEQUAL },
	{ KEY_0,        KEY_KPSLASH },
	{ KEY_F6,       KEY_NUMLOCK },
	{ KEY_KPENTER,  KEY_KPENTER },
	{ KEY_BACKSPACE, KEY_BACKSPACE },
	{ }
};

static struct hidinput_key_translation powerbook_iso_keyboard[] = {
	{ KEY_GRAVE,    KEY_102ND },
	{ KEY_102ND,    KEY_GRAVE },
	{ }
};

static struct hidinput_key_translation *find_translation(struct hidinput_key_translation *table, u16 from)
{
	struct hidinput_key_translation *trans;

	/* Look for the translation */
	for (trans = table; trans->from; trans++)
		if (trans->from == from)
			return trans;

	return NULL;
}

static int hidinput_pb_event(struct hid_device *hid, struct input_dev *input,
		struct hid_usage *usage, __s32 value)
{
	struct hidinput_key_translation *trans;

	if (usage->code == KEY_FN) {
		if (value) hid->quirks |=  HID_QUIRK_POWERBOOK_FN_ON;
		else       hid->quirks &= ~HID_QUIRK_POWERBOOK_FN_ON;

		input_event(input, usage->type, usage->code, value);

		return 1;
	}

	if (hid_pb_fnmode) {
		int do_translate;

		trans = find_translation(powerbook_fn_keys, usage->code);
		if (trans) {
			if (test_bit(usage->code, hid->pb_pressed_fn))
				do_translate = 1;
			else if (trans->flags & POWERBOOK_FLAG_FKEY)
				do_translate =
					(hid_pb_fnmode == 2 &&  (hid->quirks & HID_QUIRK_POWERBOOK_FN_ON)) ||
					(hid_pb_fnmode == 1 && !(hid->quirks & HID_QUIRK_POWERBOOK_FN_ON));
			else
				do_translate = (hid->quirks & HID_QUIRK_POWERBOOK_FN_ON);

			if (do_translate) {
				if (value)
					set_bit(usage->code, hid->pb_pressed_fn);
				else
					clear_bit(usage->code, hid->pb_pressed_fn);

				input_event(input, usage->type, trans->to, value);

				return 1;
			}
		}

		if (test_bit(usage->code, hid->pb_pressed_numlock) ||
				test_bit(LED_NUML, input->led)) {
			trans = find_translation(powerbook_numlock_keys, usage->code);

			if (trans) {
				if (value)
					set_bit(usage->code, hid->pb_pressed_numlock);
				else
					clear_bit(usage->code, hid->pb_pressed_numlock);

				input_event(input, usage->type, trans->to, value);
			}

			return 1;
		}
	}

	if (hid->quirks & HID_QUIRK_POWERBOOK_ISO_KEYBOARD) {
		trans = find_translation(powerbook_iso_keyboard, usage->code);
		if (trans) {
			input_event(input, usage->type, trans->to, value);
			return 1;
		}
	}

	return 0;
}

static void hidinput_pb_setup(struct input_dev *input)
{
	struct hidinput_key_translation *trans;

	set_bit(KEY_NUMLOCK, input->keybit);

	/* Enable all needed keys */
	for (trans = powerbook_fn_keys; trans->from; trans++)
		set_bit(trans->to, input->keybit);

	for (trans = powerbook_numlock_keys; trans->from; trans++)
		set_bit(trans->to, input->keybit);

	for (trans = powerbook_iso_keyboard; trans->from; trans++)
		set_bit(trans->to, input->keybit);

}
#else
static inline int hidinput_pb_event(struct hid_device *hid, struct input_dev *input,
		struct hid_usage *usage, __s32 value)
{
	return 0;
}

static inline void hidinput_pb_setup(struct input_dev *input)
{
}
#endif

static inline int match_scancode(int code, int scancode)
{
	if (scancode == 0)
		return 1;
	return ((code & (HID_USAGE_PAGE | HID_USAGE)) == scancode);
}

static inline int match_keycode(int code, int keycode)
{
	if (keycode == 0)
		return 1;
	return (code == keycode);
}

static struct hid_usage *hidinput_find_key(struct hid_device *hid,
		int scancode, int keycode)
{
	int i, j, k;
	struct hid_report *report;
	struct hid_usage *usage;

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
			for (i = 0; i < report->maxfield; i++) {
				for ( j = 0; j < report->field[i]->maxusage; j++) {
					usage = report->field[i]->usage + j;
					if (usage->type == EV_KEY &&
						match_scancode(usage->hid, scancode) &&
						match_keycode(usage->code, keycode))
						return usage;
				}
			}
		}
	}
	return NULL;
}

static int hidinput_getkeycode(struct input_dev *dev, int scancode,
				int *keycode)
{
	struct hid_device *hid = input_get_drvdata(dev);
	struct hid_usage *usage;

	usage = hidinput_find_key(hid, scancode, 0);
	if (usage) {
		*keycode = usage->code;
		return 0;
	}
	return -EINVAL;
}

static int hidinput_setkeycode(struct input_dev *dev, int scancode,
				int keycode)
{
	struct hid_device *hid = input_get_drvdata(dev);
	struct hid_usage *usage;
	int old_keycode;

	if (keycode < 0 || keycode > KEY_MAX)
		return -EINVAL;

	usage = hidinput_find_key(hid, scancode, 0);
	if (usage) {
		old_keycode = usage->code;
		usage->code = keycode;

		clear_bit(old_keycode, dev->keybit);
		set_bit(usage->code, dev->keybit);
		dbg_hid(KERN_DEBUG "Assigned keycode %d to HID usage code %x\n", keycode, scancode);
		/* Set the keybit for the old keycode if the old keycode is used
		 * by another key */
		if (hidinput_find_key (hid, 0, old_keycode))
			set_bit(old_keycode, dev->keybit);

		return 0;
	}

	return -EINVAL;
}


static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
				     struct hid_usage *usage)
{
	struct input_dev *input = hidinput->input;
	struct hid_device *device = input_get_drvdata(input);
	int max = 0, code;
	unsigned long *bit = NULL;

	field->hidinput = hidinput;

	dbg_hid("Mapping: ");
	hid_resolv_usage(usage->hid);
	dbg_hid_line(" ---> ");

	if (field->flags & HID_MAIN_ITEM_CONSTANT)
		goto ignore;

	/* only LED usages are supported in output fields */
	if (field->report_type == HID_OUTPUT_REPORT &&
			(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
		dbg_hid_line(" [non-LED output field] ");
		goto ignore;
	}

	switch (usage->hid & HID_USAGE_PAGE) {

		case HID_UP_UNDEFINED:
			goto ignore;

		case HID_UP_KEYBOARD:

			set_bit(EV_REP, input->evbit);

			if ((usage->hid & HID_USAGE) < 256) {
				if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
				map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
			} else
				map_key(KEY_UNKNOWN);

			break;

		case HID_UP_BUTTON:

			code = ((usage->hid - 1) & 0xf);

			switch (field->application) {
				case HID_GD_MOUSE:
				case HID_GD_POINTER:  code += 0x110; break;
				case HID_GD_JOYSTICK: code += 0x120; break;
				case HID_GD_GAMEPAD:  code += 0x130; break;
				default:
					switch (field->physical) {
						case HID_GD_MOUSE:
						case HID_GD_POINTER:  code += 0x110; break;
						case HID_GD_JOYSTICK: code += 0x120; break;
						case HID_GD_GAMEPAD:  code += 0x130; break;
						default:              code += 0x100;
					}
			}

			/* Special handling for Logitech Cordless Desktop */
			if (field->application != HID_GD_MOUSE) {
				if (device->quirks & HID_QUIRK_LOGITECH_EXPANDED_KEYMAP) {
					int hid = usage->hid & HID_USAGE;
					if (hid < LOGITECH_EXPANDED_KEYMAP_SIZE && logitech_expanded_keymap[hid] != 0)
						code = logitech_expanded_keymap[hid];
				}
			} else {