hid-input.c

LINUX 2.6.17.4的源码

/*
 * $Id: hid-input.c,v 1.2 2002/04/23 00:59:25 rdamazio Exp $
 *
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  USB 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/input.h>
#include <linux/usb.h>
#include <linux/usb_input.h>

#undef DEBUG

#include "hid.h"

#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,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,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
};

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_ff(c)	do { usage->code = c; usage->type = EV_FF;  bit = input->ffbit;  max =  FF_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)
#define map_ff_effect(c)	do { set_bit(c, input->ffbit); } while (0)

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

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 (usbhid_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 =
					(usbhid_pb_fnmode == 2 &&  (hid->quirks & HID_QUIRK_POWERBOOK_FN_ON)) ||
					(usbhid_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;
		}
	}

	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);
}
#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 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->private;
	int max = 0, code;
	unsigned long *bit = NULL;

	field->hidinput = hidinput;

#ifdef DEBUG
	printk(KERN_DEBUG "Mapping: ");
	resolv_usage(usage->hid);
	printk(" ---> ");
#endif

	if (field->flags & HID_MAIN_ITEM_CONSTANT)
		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;
					}
			}

			map_key(code);
			break;


		case HID_UP_SIMULATION:

			switch (usage->hid & 0xffff) {
				case 0xba: map_abs(ABS_RUDDER);   break;
				case 0xbb: map_abs(ABS_THROTTLE); break;
				case 0xc4: map_abs(ABS_GAS);      break;
				case 0xc5: map_abs(ABS_BRAKE);    break;
				case 0xc8: map_abs(ABS_WHEEL);    break;
				default:   goto ignore;
			}
			break;

		case HID_UP_GENDESK:

			if ((usage->hid & 0xf0) == 0x80) {	/* SystemControl */
				switch (usage->hid & 0xf) {
					case 0x1: map_key_clear(KEY_POWER);  break;
					case 0x2: map_key_clear(KEY_SLEEP);  break;
					case 0x3: map_key_clear(KEY_WAKEUP); break;
					default: goto unknown;
				}
				break;
			}

			if ((usage->hid & 0xf0) == 0x90) {	/* D-pad */
				switch (usage->hid) {
					case HID_GD_UP:	   usage->hat_dir = 1; break;
					case HID_GD_DOWN:  usage->hat_dir = 5; break;
					case HID_GD_RIGHT: usage->hat_dir = 3; break;
					case HID_GD_LEFT:  usage->hat_dir = 7; break;
					default: goto unknown;
				}
				if (field->dpad) {
					map_abs(field->dpad);
					goto ignore;
				}
				map_abs(ABS_HAT0X);
				break;
			}

			switch (usage->hid) {

				/* These usage IDs map directly to the usage codes. */
				case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
				case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
				case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
					if (field->flags & HID_MAIN_ITEM_RELATIVE)
						map_rel(usage->hid & 0xf);
					else
						map_abs(usage->hid & 0xf);
					break;

				case HID_GD_HATSWITCH:
					usage->hat_min = field->logical_minimum;
					usage->hat_max = field->logical_maximum;
					map_abs(ABS_HAT0X);
					break;

				case HID_GD_START:	map_key_clear(BTN_START);	break;
				case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;

				default: goto unknown;
			}

			break;

		case HID_UP_LED:
			if (((usage->hid - 1) & 0xffff) >= LED_MAX)
				goto ignore;
			map_led((usage->hid - 1) & 0xffff);
			break;

		case HID_UP_DIGITIZER:

			switch (usage->hid & 0xff) {

				case 0x30: /* TipPressure */
					if (!test_bit(BTN_TOUCH, input->keybit)) {
						device->quirks |= HID_QUIRK_NOTOUCH;
						set_bit(EV_KEY, input->evbit);
						set_bit(BTN_TOUCH, input->keybit);
					}

					map_abs_clear(ABS_PRESSURE);
					break;

				case 0x32: /* InRange */
					switch (field->physical & 0xff) {
						case 0x21: map_key(BTN_TOOL_MOUSE); break;
						case 0x22: map_key(BTN_TOOL_FINGER); break;
						default: map_key(BTN_TOOL_PEN); break;
					}
					break;

				case 0x3c: /* Invert */
					map_key_clear(BTN_TOOL_RUBBER);
					break;

				case 0x33: /* Touch */
				case 0x42: /* TipSwitch */
				case 0x43: /* TipSwitch2 */
					device->quirks &= ~HID_QUIRK_NOTOUCH;
					map_key_clear(BTN_TOUCH);
					break;

				case 0x44: /* BarrelSwitch */
					map_key_clear(BTN_STYLUS);
					break;

				default:  goto unknown;
			}
			break;

		case HID_UP_CONSUMER:	/* USB HUT v1.1, pages 56-62 */

			switch (usage->hid & HID_USAGE) {
				case 0x000: goto ignore;
				case 0x034: map_key_clear(KEY_SLEEP);		break;
				case 0x036: map_key_clear(BTN_MISC);		break;
				case 0x045: map_key_clear(KEY_RADIO);		break;
				case 0x08a: map_key_clear(KEY_WWW);		break;
				case 0x08d: map_key_clear(KEY_PROGRAM);		break;
				case 0x095: map_key_clear(KEY_HELP);		break;
				case 0x09c: map_key_clear(KEY_CHANNELUP);	break;
				case 0x09d: map_key_clear(KEY_CHANNELDOWN);	break;
				case 0x0b0: map_key_clear(KEY_PLAY);		break;
				case 0x0b1: map_key_clear(KEY_PAUSE);		break;
				case 0x0b2: map_key_clear(KEY_RECORD);		break;
				case 0x0b3: map_key_clear(KEY_FASTFORWARD);	break;
				case 0x0b4: map_key_clear(KEY_REWIND);		break;
				case 0x0b5: map_key_clear(KEY_NEXTSONG);	break;
				case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);	break;
				case 0x0b7: map_key_clear(KEY_STOPCD);		break;
				case 0x0b8: map_key_clear(KEY_EJECTCD);		break;
				case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
			        case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
				case 0x0e2: map_key_clear(KEY_MUTE);		break;
				case 0x0e5: map_key_clear(KEY_BASSBOOST);	break;
				case 0x0e9: map_key_clear(KEY_VOLUMEUP);	break;
				case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);	break;
				case 0x183: map_key_clear(KEY_CONFIG);		break;
				case 0x18a: map_key_clear(KEY_MAIL);		break;
				case 0x192: map_key_clear(KEY_CALC);		break;