drivers/media/video/ir-kbd-gpio.c

/*
 *
 * Copyright (c) 2003 Gerd Knorr
 * Copyright (c) 2003 Pavel Machek
 *
 * 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
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/pci.h>

#include <media/ir-common.h>

#include "bttv.h"

/* ---------------------------------------------------------------------- */

static IR_KEYTAB_TYPE ir_codes_avermedia[IR_KEYTAB_SIZE] = {
	[ 34 ] = KEY_KP0,
	[ 40 ] = KEY_KP1,
	[ 24 ] = KEY_KP2,
	[ 56 ] = KEY_KP3,
	[ 36 ] = KEY_KP4,
	[ 20 ] = KEY_KP5,
	[ 52 ] = KEY_KP6,
	[ 44 ] = KEY_KP7,
	[ 28 ] = KEY_KP8,
	[ 60 ] = KEY_KP9,

	[ 48 ] = KEY_EJECTCD,     // Unmarked on my controller
	[  0 ] = KEY_POWER,
	[ 18 ] = BTN_LEFT,        // DISPLAY/L
	[ 50 ] = BTN_RIGHT,       // LOOP/R
	[ 10 ] = KEY_MUTE,
	[ 38 ] = KEY_RECORD,
	[ 22 ] = KEY_PAUSE,
	[ 54 ] = KEY_STOP,
	[ 30 ] = KEY_VOLUMEDOWN,
	[ 62 ] = KEY_VOLUMEUP,

	[ 32 ] = KEY_TUNER,       // TV/FM
	[ 16 ] = KEY_CD,
	[  8 ] = KEY_VIDEO,
	[  4 ] = KEY_AUDIO,
	[ 12 ] = KEY_ZOOM,        // full screen
	[  2 ] = KEY_INFO,        // preview
	[ 42 ] = KEY_SEARCH,      // autoscan
	[ 26 ] = KEY_STOP,        // freeze
	[ 58 ] = KEY_RECORD,      // capture
	[  6 ] = KEY_PLAY,        // unmarked
	[ 46 ] = KEY_RED,         // unmarked
	[ 14 ] = KEY_GREEN,       // unmarked

	[ 33 ] = KEY_YELLOW,      // unmarked
	[ 17 ] = KEY_CHANNELDOWN,
	[ 49 ] = KEY_CHANNELUP,
	[  1 ] = KEY_BLUE,        // unmarked
};

/* Matt Jesson <dvb@jesson.eclipse.co.uk */
static IR_KEYTAB_TYPE ir_codes_avermedia_dvbt[IR_KEYTAB_SIZE] = {
	[ 0x28 ] = KEY_KP0,         //'0' / 'enter'
	[ 0x22 ] = KEY_KP1,         //'1'
	[ 0x12 ] = KEY_KP2,         //'2' / 'up arrow'
	[ 0x32 ] = KEY_KP3,         //'3'
	[ 0x24 ] = KEY_KP4,         //'4' / 'left arrow'
	[ 0x14 ] = KEY_KP5,         //'5'
	[ 0x34 ] = KEY_KP6,         //'6' / 'right arrow'
	[ 0x26 ] = KEY_KP7,         //'7'
	[ 0x16 ] = KEY_KP8,         //'8' / 'down arrow'
	[ 0x36 ] = KEY_KP9,         //'9'

	[ 0x20 ] = KEY_LIST,        // 'source'
	[ 0x10 ] = KEY_TEXT,        // 'teletext'
	[ 0x00 ] = KEY_POWER,       // 'power'
	[ 0x04 ] = KEY_AUDIO,       // 'audio'
	[ 0x06 ] = KEY_ZOOM,        // 'full screen'
	[ 0x18 ] = KEY_VIDEO,       // 'display'
	[ 0x38 ] = KEY_SEARCH,      // 'loop'
	[ 0x08 ] = KEY_INFO,        // 'preview'
	[ 0x2a ] = KEY_REWIND,      // 'backward <<'
	[ 0x1a ] = KEY_FASTFORWARD, // 'forward >>'
	[ 0x3a ] = KEY_RECORD,      // 'capture'
	[ 0x0a ] = KEY_MUTE,        // 'mute'
	[ 0x2c ] = KEY_RECORD,      // 'record'
	[ 0x1c ] = KEY_PAUSE,       // 'pause'
	[ 0x3c ] = KEY_STOP,        // 'stop'
	[ 0x0c ] = KEY_PLAY,        // 'play'
	[ 0x2e ] = KEY_RED,         // 'red'
	[ 0x01 ] = KEY_BLUE,        // 'blue' / 'cancel'
	[ 0x0e ] = KEY_YELLOW,      // 'yellow' / 'ok'
	[ 0x21 ] = KEY_GREEN,       // 'green'
	[ 0x11 ] = KEY_CHANNELDOWN, // 'channel -'
	[ 0x31 ] = KEY_CHANNELUP,   // 'channel +'
	[ 0x1e ] = KEY_VOLUMEDOWN,  // 'volume -'
	[ 0x3e ] = KEY_VOLUMEUP,    // 'volume +'
};

/* Attila Kondoros <attila.kondoros@chello.hu> */
static IR_KEYTAB_TYPE ir_codes_apac_viewcomp[IR_KEYTAB_SIZE] = {

	[  1 ] = KEY_KP1,
	[  2 ] = KEY_KP2,
	[  3 ] = KEY_KP3,
	[  4 ] = KEY_KP4,
	[  5 ] = KEY_KP5,
	[  6 ] = KEY_KP6,
	[  7 ] = KEY_KP7,
	[  8 ] = KEY_KP8,
	[  9 ] = KEY_KP9,
	[  0 ] = KEY_KP0,
	[ 23 ] = KEY_LAST,        // +100
	[ 10 ] = KEY_LIST,        // recall


	[ 28 ] = KEY_TUNER,       // TV/FM
	[ 21 ] = KEY_SEARCH,      // scan
	[ 18 ] = KEY_POWER,       // power
	[ 31 ] = KEY_VOLUMEDOWN,  // vol up
	[ 27 ] = KEY_VOLUMEUP,    // vol down
	[ 30 ] = KEY_CHANNELDOWN, // chn up
	[ 26 ] = KEY_CHANNELUP,   // chn down

	[ 17 ] = KEY_VIDEO,       // video
	[ 15 ] = KEY_ZOOM,        // full screen
	[ 19 ] = KEY_MUTE,        // mute/unmute
	[ 16 ] = KEY_TEXT,        // min

	[ 13 ] = KEY_STOP,        // freeze
	[ 14 ] = KEY_RECORD,      // record
	[ 29 ] = KEY_PLAYPAUSE,   // stop
	[ 25 ] = KEY_PLAY,        // play

	[ 22 ] = KEY_GOTO,        // osd
	[ 20 ] = KEY_REFRESH,     // default
	[ 12 ] = KEY_KPPLUS,      // fine tune >>>>
	[ 24 ] = KEY_KPMINUS      // fine tune <<<<
};

/* ---------------------------------------------------------------------- */

/* Ricardo Cerqueira <v4l@cerqueira.org> */
/* Weird matching, since the remote has "uncommon" keys */

static IR_KEYTAB_TYPE ir_codes_conceptronic[IR_KEYTAB_SIZE] = {

	[ 30 ] = KEY_POWER,       // power
	[ 7  ] = KEY_MEDIA,       // source
	[ 28 ] = KEY_SEARCH,      // scan

/* FIXME: duplicate keycodes?
 *
 * These four keys seem to share the same GPIO as CH+, CH-, <<< and >>>
 * The GPIO values are
 * 6397fb for both "Scan <" and "CH -",
 * 639ffb for "Scan >" and "CH+",
 * 6384fb for "Tune <" and "<<<",
 * 638cfb for "Tune >" and ">>>", regardless of the mask.
 *
 *	[ 23 ] = KEY_BACK,        // fm scan <<
 *	[ 31 ] = KEY_FORWARD,     // fm scan >>
 *
 *	[ 4  ] = KEY_LEFT,        // fm tuning <
 *	[ 12 ] = KEY_RIGHT,       // fm tuning >
 *
 * For now, these four keys are disabled. Pressing them will generate
 * the CH+/CH-/<<</>>> events
 */

	[ 3  ] = KEY_TUNER,       // TV/FM

	[ 0  ] = KEY_RECORD,
	[ 8  ] = KEY_STOP,
	[ 17 ] = KEY_PLAY,

	[ 26 ] = KEY_PLAYPAUSE,   // freeze
	[ 25 ] = KEY_ZOOM,        // zoom
	[ 15 ] = KEY_TEXT,        // min

	[ 1  ] = KEY_KP1,
	[ 11 ] = KEY_KP2,
	[ 27 ] = KEY_KP3,
	[ 5  ] = KEY_KP4,
	[ 9  ] = KEY_KP5,
	[ 21 ] = KEY_KP6,
	[ 6  ] = KEY_KP7,
	[ 10 ] = KEY_KP8,
	[ 18 ] = KEY_KP9,
	[ 2  ] = KEY_KP0,
	[ 16 ] = KEY_LAST,        // +100
	[ 19 ] = KEY_LIST,        // recall

	[ 31 ] = KEY_CHANNELUP,   // chn down
	[ 23 ] = KEY_CHANNELDOWN, // chn up
	[ 22 ] = KEY_VOLUMEUP,    // vol down
	[ 20 ] = KEY_VOLUMEDOWN,  // vol up

	[ 4  ] = KEY_KPMINUS,     // <<<
	[ 14 ] = KEY_SETUP,       // function
	[ 12 ] = KEY_KPPLUS,      // >>>

	[ 13 ] = KEY_GOTO,        // mts
	[ 29 ] = KEY_REFRESH,     // reset
	[ 24 ] = KEY_MUTE         // mute/unmute
};

static IR_KEYTAB_TYPE ir_codes_nebula[IR_KEYTAB_SIZE] = {
	[0x00] = KEY_KP0,
	[0x01] = KEY_KP1,
	[0x02] = KEY_KP2,
	[0x03] = KEY_KP3,
	[0x04] = KEY_KP4,
	[0x05] = KEY_KP5,
	[0x06] = KEY_KP6,
	[0x07] = KEY_KP7,
	[0x08] = KEY_KP8,
	[0x09] = KEY_KP9,
	[0x0a] = KEY_TV,
	[0x0b] = KEY_AUX,
	[0x0c] = KEY_DVD,
	[0x0d] = KEY_POWER,
	[0x0e] = KEY_MHP,	/* labelled 'Picture' */
	[0x0f] = KEY_AUDIO,
	[0x10] = KEY_INFO,
	[0x11] = KEY_F13,	/* 16:9 */
	[0x12] = KEY_F14,	/* 14:9 */
	[0x13] = KEY_EPG,
	[0x14] = KEY_EXIT,
	[0x15] = KEY_MENU,
	[0x16] = KEY_UP,
	[0x17] = KEY_DOWN,
	[0x18] = KEY_LEFT,
	[0x19] = KEY_RIGHT,
	[0x1a] = KEY_ENTER,
	[0x1b] = KEY_CHANNELUP,
	[0x1c] = KEY_CHANNELDOWN,
	[0x1d] = KEY_VOLUMEUP,
	[0x1e] = KEY_VOLUMEDOWN,
	[0x1f] = KEY_RED,
	[0x20] = KEY_GREEN,
	[0x21] = KEY_YELLOW,
	[0x22] = KEY_BLUE,
	[0x23] = KEY_SUBTITLE,
	[0x24] = KEY_F15,	/* AD */
	[0x25] = KEY_TEXT,
	[0x26] = KEY_MUTE,
	[0x27] = KEY_REWIND,
	[0x28] = KEY_STOP,
	[0x29] = KEY_PLAY,
	[0x2a] = KEY_FASTFORWARD,
	[0x2b] = KEY_F16,	/* chapter */
	[0x2c] = KEY_PAUSE,
	[0x2d] = KEY_PLAY,
	[0x2e] = KEY_RECORD,
	[0x2f] = KEY_F17,	/* picture in picture */
	[0x30] = KEY_KPPLUS,	/* zoom in */
	[0x31] = KEY_KPMINUS,	/* zoom out */
	[0x32] = KEY_F18,	/* capture */
	[0x33] = KEY_F19,	/* web */
	[0x34] = KEY_EMAIL,
	[0x35] = KEY_PHONE,
	[0x36] = KEY_PC
};

struct IR {
	struct bttv_sub_device  *sub;
	struct input_dev        *input;
	struct ir_input_state   ir;
	char                    name[32];
	char                    phys[32];

	/* Usual gpio signalling */

	u32                     mask_keycode;
	u32                     mask_keydown;
	u32                     mask_keyup;
	u32                     polling;
	u32                     last_gpio;
	struct work_struct      work;
	struct timer_list       timer;

	/* RC5 gpio */
	u32 rc5_gpio;
	struct timer_list timer_end;	/* timer_end for code completion */
	struct timer_list timer_keyup;	/* timer_end for key release */
	u32 last_rc5;			/* last good rc5 code */
	u32 last_bit;			/* last raw bit seen */
	u32 code;			/* raw code under construction */
	struct timeval base_time;	/* time of last seen code */
	int active;			/* building raw code */
};

static int debug;
module_param(debug, int, 0644);    /* debug level (0,1,2) */
static int repeat_delay = 500;
module_param(repeat_delay, int, 0644);
static int repeat_period = 33;
module_param(repeat_period, int, 0644);

#define DEVNAME "ir-kbd-gpio"
#define dprintk(fmt, arg...)	if (debug) \
	printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)

static void ir_irq(struct bttv_sub_device *sub);
static int ir_probe(struct device *dev);
static int ir_remove(struct device *dev);

static struct bttv_sub_driver driver = {
	.drv = {
		.name	= DEVNAME,
		.probe	= ir_probe,
		.remove	= ir_remove,
	},
	.gpio_irq 	= ir_irq,
};

/* ---------------------------------------------------------------------- */

static void ir_handle_key(struct IR *ir)
{
	u32 gpio,data;

	/* read gpio value */
	gpio = bttv_gpio_read(ir->sub->core);
	if (ir->polling) {
		if (ir->last_gpio == gpio)
			return;
		ir->last_gpio = gpio;
	}

	/* extract data */
	data = ir_extract_bits(gpio, ir->mask_keycode);
	dprintk(DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
		gpio, data,
		ir->polling               ? "poll"  : "irq",
		(gpio & ir->mask_keydown) ? " down" : "",
		(gpio & ir->mask_keyup)   ? " up"   : "");

	if (ir->mask_keydown) {
		/* bit set on keydown */
		if (gpio & ir->mask_keydown) {
			ir_input_keydown(ir->input, &ir->ir, data, data);
		} else {
			ir_input_nokey(ir->input, &ir->ir);
		}

	} else if (ir->mask_keyup) {
		/* bit cleared on keydown */
		if (0 == (gpio & ir->mask_keyup)) {
			ir_input_keydown(ir->input, &ir->ir, data, data);
		} else {
			ir_input_nokey(ir->input, &ir->ir);
		}

	} else {
		/* can't disturgissh keydown/up :-/ */
		ir_input_keydown(ir->input, &ir->ir, data, data);
		ir_input_nokey(ir->input, &ir->ir);
	}
}

static void ir_irq(struct bttv_sub_device *sub)
{
	struct IR *ir = dev_get_drvdata(&sub->dev);

	if (!ir->polling)
		ir_handle_key(ir);
}

static void ir_timer(unsigned long data)
{
	struct IR *ir = (struct IR*)data;

	schedule_work(&ir->work);
}

static void ir_work(void *data)
{
	struct IR *ir = data;
	unsigned long timeout;

	ir_handle_key(ir);
	timeout = jiffies + (ir->polling * HZ / 1000);
	mod_timer(&ir->timer, timeout);
}

/* ---------------------------------------------------------------*/

static int rc5_remote_gap = 885;
module_param(rc5_remote_gap, int, 0644);
static int rc5_key_timeout = 200;
module_param(rc5_key_timeout, int, 0644);

#define RC5_START(x)	(((x)>>12)&3)
#define RC5_TOGGLE(x)	(((x)>>11)&1)
#define RC5_ADDR(x)	(((x)>>6)&31)
#define RC5_INSTR(x)	((x)&63)

/* decode raw bit pattern to RC5 code */
static u32 rc5_decode(unsigned int code)
{
	unsigned int org_code = code;
	unsigned int pair;
	unsigned int rc5 = 0;
	int i;

	code = (code << 1) | 1;
	for (i = 0; i < 14; ++i) {
		pair = code & 0x3;
		code >>= 2;

		rc5 <<= 1;
		switch (pair) {
		case 0:
		case 2:
			break;
		case 1:
			rc5 |= 1;
			break;
		case 3:
			dprintk("bad code: %x\n", org_code);
			return 0;
		}
	}
	dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
		"instr=%x\n", rc5, org_code, RC5_START(rc5),
		RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
	return rc5;
}

static int ir_rc5_irq(struct bttv_sub_device *sub)
{
	struct IR *ir = dev_get_drvdata(&sub->dev);
	struct timeval tv;
	u32 gpio;
	u32 gap;
	unsigned long current_jiffies, timeout;

	/* read gpio port */
	gpio = bttv_gpio_read(ir->sub->core);

	/* remote IRQ? */
	if (!(gpio & 0x20))
		return 0;

	/* get time of bit */
	current_jiffies = jiffies;
	do_gettimeofday(&tv);

	/* avoid overflow with gap >1s */
	if (tv.tv_sec - ir->base_time.tv_sec > 1) {
		gap = 200000;
	} else {
		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
		    tv.tv_usec - ir->base_time.tv_usec;
	}

	/* active code => add bit */
	if (ir->active) {
		/* only if in the code (otherwise spurious IRQ or timer
		   late) */
		if (ir->last_bit < 28) {
			ir->last_bit = (gap - rc5_remote_gap / 2) /
			    rc5_remote_gap;
			ir->code |= 1 << ir->last_bit;
		}
		/* starting new code */
	} else {
		ir->active = 1;
		ir->code = 0;
		ir->base_time = tv;
		ir->last_bit = 0;

		timeout = current_jiffies + (500 + 30 * HZ) / 1000;
		mod_timer(&ir->timer_end, timeout);
	}

	/* toggle GPIO pin 4 to reset the irq */
	bttv_gpio_write(ir->sub->core, gpio & ~(1 << 4));
	bttv_gpio_write(ir->sub->core, gpio | (1 << 4));
	return 1;
}

static void ir_rc5_timer_end(unsigned long data)
{
	struct IR *ir = (struct IR *)data;
	struct timeval tv;
	unsigned long current_jiffies, timeout;
	u32 gap;

	/* get time */
	current_jiffies = jiffies;
	do_gettimeofday(&tv);

	/* avoid overflow with gap >1s */
	if (tv.tv_sec - ir->base_time.tv_sec > 1) {
		gap = 200000;
	} else {
		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
		    tv.tv_usec - ir->base_time.tv_usec;
	}

	/* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
	if (gap < 28000) {
		dprintk("spurious timer_end\n");
		return;
	}

	ir->active = 0;
	if (ir->last_bit < 20) {
		/* ignore spurious codes (caused by light/other remotes) */
		dprintk("short code: %x\n", ir->code);
	} else {
		u32 rc5 = rc5_decode(ir->code);

		/* two start bits? */
		if (RC5_START(rc5) != 3) {
			dprintk("rc5 start bits invalid: %u\n", RC5_START(rc5));

			/* right address? */
		} else if (RC5_ADDR(rc5) == 0x0) {
			u32 toggle = RC5_TOGGLE(rc5);
			u32 instr = RC5_INSTR(rc5);

			/* Good code, decide if repeat/repress */
			if (toggle != RC5_TOGGLE(ir->last_rc5) ||
			    instr != RC5_INSTR(ir->last_rc5)) {
				dprintk("instruction %x, toggle %x\n", instr,
					toggle);
				ir_input_nokey(ir->input, &ir->ir);
				ir_input_keydown(ir->input, &ir->ir, instr,
						 instr);
			}

			/* Set/reset key-up timer */
			timeout = current_jiffies + (500 + rc5_key_timeout
						     * HZ) / 1000;
			mod_timer(&ir->timer_keyup, timeout);

			/* Save code for repeat test */
			ir->last_rc5 = rc5;
		}
	}
}

static void ir_rc5_timer_keyup(unsigned long data)
{
	struct IR *ir = (struct IR *)data;

	dprintk("key released\n");
	ir_input_nokey(ir->input, &ir->ir);
}

/* ---------------------------------------------------------------------- */

static int ir_probe(struct device *dev)
{
	struct bttv_sub_device *sub = to_bttv_sub_dev(dev);
	struct IR *ir;
	struct input_dev *input_dev;
	IR_KEYTAB_TYPE *ir_codes = NULL;
	int ir_type = IR_TYPE_OTHER;

	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ir || !input_dev) {
		kfree(ir);
		input_free_device(input_dev);
		return -ENOMEM;
	}

	/* detect & configure */
	switch (sub->core->type) {
	case BTTV_BOARD_AVERMEDIA:
	case BTTV_BOARD_AVPHONE98:
	case BTTV_BOARD_AVERMEDIA98:
		ir_codes         = ir_codes_avermedia;
		ir->mask_keycode = 0xf88000;
		ir->mask_keydown = 0x010000;
		ir->polling      = 50; // ms
		break;

	case BTTV_BOARD_AVDVBT_761:
	case BTTV_BOARD_AVDVBT_771:
		ir_codes         = ir_codes_avermedia_dvbt;
		ir->mask_keycode = 0x0f00c0;
		ir->mask_keydown = 0x000020;
		ir->polling      = 50; // ms
		break;

	case BTTV_BOARD_PXELVWPLTVPAK:
		ir_codes         = ir_codes_pixelview;
		ir->mask_keycode = 0x003e00;
		ir->mask_keyup   = 0x010000;
		ir->polling      = 50; // ms
		break;
	case BTTV_BOARD_PV_BT878P_9B:
	case BTTV_BOARD_PV_BT878P_PLUS:
		ir_codes         = ir_codes_pixelview;
		ir->mask_keycode = 0x001f00;
		ir->mask_keyup   = 0x008000;
		ir->polling      = 50; // ms
		break;

	case BTTV_BOARD_WINFAST2000:
		ir_codes         = ir_codes_winfast;
		ir->mask_keycode = 0x1f8;
		break;
	case BTTV_BOARD_MAGICTVIEW061:
	case BTTV_BOARD_MAGICTVIEW063:
		ir_codes         = ir_codes_winfast;
		ir->mask_keycode = 0x0008e000;
		ir->mask_keydown = 0x00200000;
		break;
	case BTTV_BOARD_APAC_VIEWCOMP:
		ir_codes         = ir_codes_apac_viewcomp;
		ir->mask_keycode = 0x001f00;
		ir->mask_keyup   = 0x008000;
		ir->polling      = 50; // ms
		break;
	case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
		ir_codes         = ir_codes_conceptronic;
		ir->mask_keycode = 0x001F00;
		ir->mask_keyup   = 0x006000;
		ir->polling      = 50; // ms
		break;
	case BTTV_BOARD_NEBULA_DIGITV:
		ir_codes = ir_codes_nebula;
		driver.any_irq = ir_rc5_irq;
		driver.gpio_irq = NULL;
		ir->rc5_gpio = 1;
		break;
	}
	if (NULL == ir_codes) {
		kfree(ir);
		input_free_device(input_dev);
		return -ENODEV;
	}

	if (ir->rc5_gpio) {
		u32 gpio;
	    	/* enable remote irq */
		bttv_gpio_inout(sub->core, (1 << 4), 1 << 4);
		gpio = bttv_gpio_read(sub->core);
		bttv_gpio_write(sub->core, gpio & ~(1 << 4));
		bttv_gpio_write(sub->core, gpio | (1 << 4));
	} else {
		/* init hardware-specific stuff */
		bttv_gpio_inout(sub->core, ir->mask_keycode | ir->mask_keydown, 0);
	}

	/* init input device */
	snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
		 sub->core->type);
	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
		 pci_name(sub->core->pci));

	ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
	input_dev->name = ir->name;
	input_dev->phys = ir->phys;
	input_dev->id.bustype = BUS_PCI;
	input_dev->id.version = 1;
	if (sub->core->pci->subsystem_vendor) {
		input_dev->id.vendor  = sub->core->pci->subsystem_vendor;
		input_dev->id.product = sub->core->pci->subsystem_device;
	} else {
		input_dev->id.vendor  = sub->core->pci->vendor;
		input_dev->id.product = sub->core->pci->device;
	}
	input_dev->cdev.dev = &sub->core->pci->dev;

	ir->input = input_dev;
	ir->sub = sub;

	if (ir->polling) {
		INIT_WORK(&ir->work, ir_work, ir);
		init_timer(&ir->timer);
		ir->timer.function = ir_timer;
		ir->timer.data     = (unsigned long)ir;
		schedule_work(&ir->work);
	} else if (ir->rc5_gpio) {
		/* set timer_end for code completion */
		init_timer(&ir->timer_end);
		ir->timer_end.function = ir_rc5_timer_end;
		ir->timer_end.data = (unsigned long)ir;

		init_timer(&ir->timer_keyup);
		ir->timer_keyup.function = ir_rc5_timer_keyup;
		ir->timer_keyup.data = (unsigned long)ir;
	}

	/* all done */
	dev_set_drvdata(dev, ir);
	input_register_device(ir->input);

	/* the remote isn't as bouncy as a keyboard */
	ir->input->rep[REP_DELAY] = repeat_delay;
	ir->input->rep[REP_PERIOD] = repeat_period;

	return 0;
}

static int ir_remove(struct device *dev)
{
	struct IR *ir = dev_get_drvdata(dev);

	if (ir->polling) {
		del_timer(&ir->timer);
		flush_scheduled_work();
	}

	if (ir->rc5_gpio) {
		u32 gpio;

		del_timer(&ir->timer_end);
		flush_scheduled_work();

		gpio = bttv_gpio_read(ir->sub->core);
		bttv_gpio_write(ir->sub->core, gpio & ~(1 << 4));
	}

	input_unregister_device(ir->input);
	kfree(ir);
	return 0;
}

/* ---------------------------------------------------------------------- */

MODULE_AUTHOR("Gerd Knorr, Pavel Machek");
MODULE_DESCRIPTION("input driver for bt8x8 gpio IR remote controls");
MODULE_LICENSE("GPL");

static int ir_init(void)
{
	return bttv_sub_register(&driver, "remote");
}

static void ir_fini(void)
{
	bttv_sub_unregister(&driver);
}

module_init(ir_init);
module_exit(ir_fini);


/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */