[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / ir-kbd-i2c.c

/*
 *
 * keyboard input driver for i2c IR remote controls
 *
 * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
 * modified for PixelView (BT878P+W/FM) by
 *      Michal Kochanowicz <mkochano@pld.org.pl>
 *      Christoph Bartelmus <lirc@bartelmus.de>
 * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
 *      Ulrich Mueller <ulrich.mueller42@web.de>
 * modified for em2820 based USB TV tuners by
 *      Markus Rechberger <mrechberger@gmail.com>
 *
 *  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/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <asm/semaphore.h>

#include <media/ir-common.h>
#include <media/ir-kbd-i2c.h>

/* Mark Phalan <phalanm@o2.ie> */
static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
	[  0 ] = KEY_KP0,
	[  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,

	[ 18 ] = KEY_POWER,
	[ 16 ] = KEY_MUTE,
	[ 31 ] = KEY_VOLUMEDOWN,
	[ 27 ] = KEY_VOLUMEUP,
	[ 26 ] = KEY_CHANNELUP,
	[ 30 ] = KEY_CHANNELDOWN,
	[ 14 ] = KEY_PAGEUP,
	[ 29 ] = KEY_PAGEDOWN,
	[ 19 ] = KEY_SOUND,

	[ 24 ] = KEY_KPPLUSMINUS,	/* CH +/- */
	[ 22 ] = KEY_SUBTITLE,		/* CC */
	[ 13 ] = KEY_TEXT,		/* TTX */
	[ 11 ] = KEY_TV,		/* AIR/CBL */
	[ 17 ] = KEY_PC,		/* PC/TV */
	[ 23 ] = KEY_OK,		/* CH RTN */
	[ 25 ] = KEY_MODE, 		/* FUNC */
	[ 12 ] = KEY_SEARCH, 		/* AUTOSCAN */

	/* Not sure what to do with these ones! */
	[ 15 ] = KEY_SELECT, 		/* SOURCE */
	[ 10 ] = KEY_KPPLUS,		/* +100 */
	[ 20 ] = KEY_KPEQUAL,		/* SYNC */
	[ 28 ] = KEY_MEDIA,             /* PC/TV */
};

/* ----------------------------------------------------------------------- */
/* insmod parameters                                                       */

static int debug;
module_param(debug, int, 0644);    /* debug level (0,1,2) */

#define DEVNAME "ir-kbd-i2c"
#define dprintk(level, fmt, arg...)	if (debug >= level) \
	printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)

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

static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char buf[3];
	int start, toggle, dev, code;

	/* poll IR chip */
	if (3 != i2c_master_recv(&ir->c,buf,3))
		return -EIO;

	/* split rc5 data block ... */
	start  = (buf[0] >> 6) &    3;
	toggle = (buf[0] >> 5) &    1;
	dev    =  buf[0]       & 0x1f;
	code   = (buf[1] >> 2) & 0x3f;

	if (3 != start)
		/* no key pressed */
		return 0;
	dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
		start, toggle, dev, code);

	/* return key */
	*ir_key = code;
	*ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
	return 1;
}

static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b;

	/* poll IR chip */
	if (1 != i2c_master_recv(&ir->c,&b,1)) {
		dprintk(1,"read error\n");
		return -EIO;
	}
	*ir_key = b;
	*ir_raw = b;
	return 1;
}

static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b;

	/* poll IR chip */
	if (1 != i2c_master_recv(&ir->c,&b,1)) {
		dprintk(1,"read error\n");
		return -EIO;
	}

	/* ignore 0xaa */
	if (b==0xaa)
		return 0;
	dprintk(2,"key %02x\n", b);

	*ir_key = b;
	*ir_raw = b;
	return 1;
}

static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b;

	/* poll IR chip */
	if (1 != i2c_master_recv(&ir->c,&b,1)) {
		dprintk(1,"read error\n");
		return -EIO;
	}

	/* it seems that 0xFE indicates that a button is still hold
	   down, while 0xff indicates that no button is hold
	   down. 0xfe sequences are sometimes interrupted by 0xFF */

	dprintk(2,"key %02x\n", b);

	if (b == 0xff)
		return 0;

	if (b == 0xfe)
		/* keep old data */
		return 1;

	*ir_key = b;
	*ir_raw = b;
	return 1;
}

/* The new pinnacle PCTV remote (with the colored buttons)
 *
 * Ricardo Cerqueira <v4l@cerqueira.org>
 */

int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b[4];
	unsigned int start = 0,parity = 0,code = 0;

	/* poll IR chip */
	if (4 != i2c_master_recv(&ir->c,b,4)) {
		dprintk(2,"read error\n");
		return -EIO;
	}

	for (start = 0; start<4; start++) {
		if (b[start] == 0x80) {
			code=b[(start+3)%4];
			parity=b[(start+2)%4];
		}
	}

	/* Empty Request */
	if (parity==0)
		return 0;

	/* Repeating... */
	if (ir->old == parity)
		return 0;


	ir->old = parity;

	/* Reduce code value to fit inside IR_KEYTAB_SIZE
	 *
	 * this is the only value that results in 42 unique
	 * codes < 128
	 */

	code %= 0x88;

	*ir_raw = code;
	*ir_key = code;

	dprintk(1,"Pinnacle PCTV key %02x\n", code);

	return 1;
}

EXPORT_SYMBOL_GPL(get_key_pinnacle);

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

static void ir_key_poll(struct IR_i2c *ir)
{
	static u32 ir_key, ir_raw;
	int rc;

	dprintk(2,"ir_poll_key\n");
	rc = ir->get_key(ir, &ir_key, &ir_raw);
	if (rc < 0) {
		dprintk(2,"error\n");
		return;
	}

	if (0 == rc) {
		ir_input_nokey(ir->input, &ir->ir);
	} else {
		ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
	}
}

static void ir_timer(unsigned long data)
{
	struct IR_i2c *ir = (struct IR_i2c*)data;
	schedule_work(&ir->work);
}

static void ir_work(void *data)
{
	struct IR_i2c *ir = data;
	ir_key_poll(ir);
	mod_timer(&ir->timer, jiffies+HZ/10);
}

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

static int ir_attach(struct i2c_adapter *adap, int addr,
		      unsigned short flags, int kind);
static int ir_detach(struct i2c_client *client);
static int ir_probe(struct i2c_adapter *adap);

static struct i2c_driver driver = {
	.driver = {
		.name   = "ir-kbd-i2c",
	},
	.id             = I2C_DRIVERID_INFRARED,
	.attach_adapter = ir_probe,
	.detach_client  = ir_detach,
};

static struct i2c_client client_template =
{
	.name = "unset",
	.driver = &driver
};

static int ir_attach(struct i2c_adapter *adap, int addr,
		     unsigned short flags, int kind)
{
	IR_KEYTAB_TYPE *ir_codes = NULL;
	char *name;
	int ir_type;
	struct IR_i2c *ir;
	struct input_dev *input_dev;

	ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ir || !input_dev) {
		input_free_device(input_dev);
		kfree(ir);
		return -ENOMEM;
	}
	memset(ir,0,sizeof(*ir));

	ir->c = client_template;
	ir->input = input_dev;

	ir->c.adapter = adap;
	ir->c.addr    = addr;

	i2c_set_clientdata(&ir->c, ir);

	switch(addr) {
	case 0x64:
		name        = "Pixelview";
		ir->get_key = get_key_pixelview;
		ir_type     = IR_TYPE_OTHER;
		ir_codes    = ir_codes_empty;
		break;
	case 0x4b:
		name        = "PV951";
		ir->get_key = get_key_pv951;
		ir_type     = IR_TYPE_OTHER;
		ir_codes    = ir_codes_pv951;
		break;
	case 0x18:
	case 0x1a:
		name        = "Hauppauge";
		ir->get_key = get_key_haup;
		ir_type     = IR_TYPE_RC5;
		ir_codes    = ir_codes_rc5_tv;
		break;
	case 0x30:
		name        = "KNC One";
		ir->get_key = get_key_knc1;
		ir_type     = IR_TYPE_OTHER;
		ir_codes    = ir_codes_empty;
		break;
	case 0x7a:
	case 0x47:
		/* Handled by saa7134-input */
		name        = "SAA713x remote";
		ir_type     = IR_TYPE_OTHER;
		break;
	default:
		/* shouldn't happen */
		printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
		kfree(ir);
		return -1;
	}

	/* Sets name */
	snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
	ir->ir_codes=ir_codes;

	/* register i2c device
	 * At device register, IR codes may be changed to be
	 * board dependent.
	 */
	i2c_attach_client(&ir->c);

	/* If IR not supported or disabled, unregisters driver */
	if (ir->get_key == NULL) {
		i2c_detach_client(&ir->c);
		kfree(ir);
		return -1;
	}

	/* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
	snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
		 ir->c.adapter->dev.bus_id,
		 ir->c.dev.bus_id);

	/* init + register input device */
	ir_input_init(input_dev,&ir->ir,ir_type,ir->ir_codes);
	input_dev->id.bustype = BUS_I2C;
	input_dev->name       = ir->c.name;
	input_dev->phys       = ir->phys;

	/* register event device */
	input_register_device(ir->input);
	printk(DEVNAME ": %s detected at %s [%s]\n",
	       ir->input->name,ir->input->phys,adap->name);

	/* start polling via eventd */
	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);

	return 0;
}

static int ir_detach(struct i2c_client *client)
{
	struct IR_i2c *ir = i2c_get_clientdata(client);

	/* kill outstanding polls */
	del_timer(&ir->timer);
	flush_scheduled_work();

	/* unregister devices */
	input_unregister_device(ir->input);
	i2c_detach_client(&ir->c);

	/* free memory */
	kfree(ir);
	return 0;
}

static int ir_probe(struct i2c_adapter *adap)
{

	/* The external IR receiver is at i2c address 0x34 (0x35 for
	   reads).  Future Hauppauge cards will have an internal
	   receiver at 0x30 (0x31 for reads).  In theory, both can be
	   fitted, and Hauppauge suggest an external overrides an
	   internal.

	   That's why we probe 0x1a (~0x34) first. CB
	*/

	static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
	static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
	static const int probe_em28XX[] = { 0x30, 0x47, -1 };
	const int *probe = NULL;
	struct i2c_client c;
	unsigned char buf;
	int i,rc;

	switch (adap->id) {
	case I2C_HW_B_BT848:
		probe = probe_bttv;
		break;
	case I2C_HW_SAA7134:
		probe = probe_saa7134;
		break;
	case I2C_HW_B_EM28XX:
		probe = probe_em28XX;
		break;
	}
	if (NULL == probe)
		return 0;

	memset(&c,0,sizeof(c));
	c.adapter = adap;
	for (i = 0; -1 != probe[i]; i++) {
		c.addr = probe[i];
		rc = i2c_master_recv(&c,&buf,0);
		dprintk(1,"probe 0x%02x @ %s: %s\n",
			probe[i], adap->name,
			(0 == rc) ? "yes" : "no");
		if (0 == rc) {
			ir_attach(adap,probe[i],0,0);
			break;
		}
	}
	return 0;
}

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

MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
MODULE_DESCRIPTION("input driver for i2c IR remote controls");
MODULE_LICENSE("GPL");

static int __init ir_init(void)
{
	return i2c_add_driver(&driver);
}

static void __exit ir_fini(void)
{
	i2c_del_driver(&driver);
}

module_init(ir_init);
module_exit(ir_fini);

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	*
	3	* keyboard input driver for i2c IR remote controls
	4	*
	5	* Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
	6	* modified for PixelView (BT878P+W/FM) by
	7	* Michal Kochanowicz <mkochano@pld.org.pl>
	8	* Christoph Bartelmus <lirc@bartelmus.de>
	9	* modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
	10	* Ulrich Mueller <ulrich.mueller42@web.de>
c365864f MR	11	* modified for em2820 based USB TV tuners by
c365864f MR	12	* Markus Rechberger <mrechberger@gmail.com>
1da177e4 LT	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License as published by
	16	* the Free Software Foundation; either version 2 of the License, or
	17	* (at your option) any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	27	*
	28	*/
	29
	30	#include <linux/module.h>
	31	#include <linux/moduleparam.h>
	32	#include <linux/init.h>
	33	#include <linux/kernel.h>
	34	#include <linux/sched.h>
	35	#include <linux/string.h>
	36	#include <linux/timer.h>
	37	#include <linux/delay.h>
	38	#include <linux/errno.h>
	39	#include <linux/slab.h>
	40	#include <linux/i2c.h>
	41	#include <linux/workqueue.h>
1da177e4	42	#include <asm/semaphore.h>
674434c6	43
1da177e4	44	#include <media/ir-common.h>
d5e52653	45	#include <media/ir-kbd-i2c.h>
c365864f	46
1da177e4 LT	47	/* Mark Phalan <phalanm@o2.ie> */
1da177e4 LT	48	static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
d5e52653 MCC	49	[ 0 ] = KEY_KP0,
	50	[ 1 ] = KEY_KP1,
	51	[ 2 ] = KEY_KP2,
	52	[ 3 ] = KEY_KP3,
	53	[ 4 ] = KEY_KP4,
	54	[ 5 ] = KEY_KP5,
	55	[ 6 ] = KEY_KP6,
	56	[ 7 ] = KEY_KP7,
	57	[ 8 ] = KEY_KP8,
	58	[ 9 ] = KEY_KP9,
	59
	60	[ 18 ] = KEY_POWER,
	61	[ 16 ] = KEY_MUTE,
	62	[ 31 ] = KEY_VOLUMEDOWN,
	63	[ 27 ] = KEY_VOLUMEUP,
	64	[ 26 ] = KEY_CHANNELUP,
	65	[ 30 ] = KEY_CHANNELDOWN,
	66	[ 14 ] = KEY_PAGEUP,
	67	[ 29 ] = KEY_PAGEDOWN,
	68	[ 19 ] = KEY_SOUND,
	69
	70	[ 24 ] = KEY_KPPLUSMINUS, /* CH +/- */
	71	[ 22 ] = KEY_SUBTITLE, /* CC */
	72	[ 13 ] = KEY_TEXT, /* TTX */
	73	[ 11 ] = KEY_TV, /* AIR/CBL */
	74	[ 17 ] = KEY_PC, /* PC/TV */
	75	[ 23 ] = KEY_OK, /* CH RTN */
	76	[ 25 ] = KEY_MODE, /* FUNC */
	77	[ 12 ] = KEY_SEARCH, /* AUTOSCAN */
1da177e4 LT	78
1da177e4 LT	79	/* Not sure what to do with these ones! */
d5e52653 MCC	80	[ 15 ] = KEY_SELECT, /* SOURCE */
	81	[ 10 ] = KEY_KPPLUS, /* +100 */
	82	[ 20 ] = KEY_KPEQUAL, /* SYNC */
	83	[ 28 ] = KEY_MEDIA, /* PC/TV */
1da177e4 LT	84	};
1da177e4 LT	85
1da177e4 LT	86	/* ----------------------------------------------------------------------- */
	87	/* insmod parameters */
	88
	89	static int debug;
	90	module_param(debug, int, 0644); /* debug level (0,1,2) */
	91
	92	#define DEVNAME "ir-kbd-i2c"
	93	#define dprintk(level, fmt, arg...) if (debug >= level) \
	94	printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
	95
	96	/* ----------------------------------------------------------------------- */
	97
d5e52653	98	static int get_key_haup(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
1da177e4 LT	99	{
	100	unsigned char buf[3];
	101	int start, toggle, dev, code;
	102
	103	/* poll IR chip */
	104	if (3 != i2c_master_recv(&ir->c,buf,3))
	105	return -EIO;
	106
	107	/* split rc5 data block ... */
	108	start = (buf[0] >> 6) & 3;
	109	toggle = (buf[0] >> 5) & 1;
	110	dev = buf[0] & 0x1f;
	111	code = (buf[1] >> 2) & 0x3f;
	112
	113	if (3 != start)
	114	/* no key pressed */
	115	return 0;
	116	dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
	117	start, toggle, dev, code);
	118
	119	/* return key */
	120	*ir_key = code;
	121	*ir_raw = (start << 12) \| (toggle << 11) \| (dev << 6) \| code;
	122	return 1;
	123	}
	124
d5e52653	125	static int get_key_pixelview(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
1da177e4	126	{
4ac97914	127	unsigned char b;
1da177e4 LT	128
	129	/* poll IR chip */
	130	if (1 != i2c_master_recv(&ir->c,&b,1)) {
	131	dprintk(1,"read error\n");
	132	return -EIO;
	133	}
	134	*ir_key = b;
	135	*ir_raw = b;
	136	return 1;
	137	}
	138
d5e52653	139	static int get_key_pv951(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
1da177e4	140	{
4ac97914	141	unsigned char b;
1da177e4 LT	142
	143	/* poll IR chip */
	144	if (1 != i2c_master_recv(&ir->c,&b,1)) {
	145	dprintk(1,"read error\n");
	146	return -EIO;
	147	}
	148
	149	/* ignore 0xaa */
	150	if (b==0xaa)
	151	return 0;
	152	dprintk(2,"key %02x\n", b);
	153
	154	*ir_key = b;
	155	*ir_raw = b;
	156	return 1;
	157	}
	158
d5e52653	159	static int get_key_knc1(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
1da177e4 LT	160	{
	161	unsigned char b;
	162
	163	/* poll IR chip */
	164	if (1 != i2c_master_recv(&ir->c,&b,1)) {
	165	dprintk(1,"read error\n");
	166	return -EIO;
	167	}
	168
	169	/* it seems that 0xFE indicates that a button is still hold
4f9c05aa MCC	170	down, while 0xff indicates that no button is hold
4f9c05aa MCC	171	down. 0xfe sequences are sometimes interrupted by 0xFF */
1da177e4 LT	172
	173	dprintk(2,"key %02x\n", b);
	174
4f9c05aa	175	if (b == 0xff)
1da177e4 LT	176	return 0;
1da177e4 LT	177
4f9c05aa	178	if (b == 0xfe)
1da177e4 LT	179	/* keep old data */
	180	return 1;
	181
	182	*ir_key = b;
	183	*ir_raw = b;
	184	return 1;
	185	}
	186
8069695c RC	187	/* The new pinnacle PCTV remote (with the colored buttons)
	188	*
	189	* Ricardo Cerqueira <v4l@cerqueira.org>
	190	*/
	191
	192	int get_key_pinnacle(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	193	{
	194	unsigned char b[4];
	195	unsigned int start = 0,parity = 0,code = 0;
	196
	197	/* poll IR chip */
	198	if (4 != i2c_master_recv(&ir->c,b,4)) {
	199	dprintk(2,"read error\n");
	200	return -EIO;
	201	}
	202
	203	for (start = 0; start<4; start++) {
	204	if (b[start] == 0x80) {
	205	code=b[(start+3)%4];
	206	parity=b[(start+2)%4];
	207	}
	208	}
	209
	210	/* Empty Request */
	211	if (parity==0)
	212	return 0;
	213
	214	/* Repeating... */
	215	if (ir->old == parity)
	216	return 0;
	217
	218
	219	ir->old = parity;
	220
	221	/* Reduce code value to fit inside IR_KEYTAB_SIZE
	222	*
	223	* this is the only value that results in 42 unique
	224	* codes < 128
	225	*/
	226
	227	code %= 0x88;
	228
	229	*ir_raw = code;
	230	*ir_key = code;
	231
	232	dprintk(1,"Pinnacle PCTV key %02x\n", code);
	233
	234	return 1;
	235	}
	236
	237	EXPORT_SYMBOL_GPL(get_key_pinnacle);
	238
1da177e4 LT	239	/* ----------------------------------------------------------------------- */
1da177e4 LT	240
d5e52653	241	static void ir_key_poll(struct IR_i2c *ir)
1da177e4 LT	242	{
	243	static u32 ir_key, ir_raw;
	244	int rc;
	245
	246	dprintk(2,"ir_poll_key\n");
	247	rc = ir->get_key(ir, &ir_key, &ir_raw);
	248	if (rc < 0) {
	249	dprintk(2,"error\n");
	250	return;
	251	}
	252
	253	if (0 == rc) {
b7df3910	254	ir_input_nokey(ir->input, &ir->ir);
1da177e4	255	} else {
b7df3910	256	ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
1da177e4 LT	257	}
	258	}
	259
	260	static void ir_timer(unsigned long data)
	261	{
d5e52653	262	struct IR_i2c ir = (struct IR_i2c)data;
1da177e4 LT	263	schedule_work(&ir->work);
	264	}
	265
	266	static void ir_work(void *data)
	267	{
d5e52653	268	struct IR_i2c *ir = data;
1da177e4 LT	269	ir_key_poll(ir);
	270	mod_timer(&ir->timer, jiffies+HZ/10);
	271	}
	272
	273	/* ----------------------------------------------------------------------- */
	274
	275	static int ir_attach(struct i2c_adapter *adap, int addr,
	276	unsigned short flags, int kind);
	277	static int ir_detach(struct i2c_client *client);
	278	static int ir_probe(struct i2c_adapter *adap);
	279
	280	static struct i2c_driver driver = {
604f28e2	281	.driver = {
cab462f7	282	.name = "ir-kbd-i2c",
604f28e2	283	},
dd815408	284	.id = I2C_DRIVERID_INFRARED,
4ac97914 MCC	285	.attach_adapter = ir_probe,
4ac97914 MCC	286	.detach_client = ir_detach,
1da177e4 LT	287	};
	288
	289	static struct i2c_client client_template =
	290	{
4ac97914 MCC	291	.name = "unset",
4ac97914 MCC	292	.driver = &driver
1da177e4 LT	293	};
	294
	295	static int ir_attach(struct i2c_adapter *adap, int addr,
	296	unsigned short flags, int kind)
	297	{
	298	IR_KEYTAB_TYPE *ir_codes = NULL;
	299	char *name;
	300	int ir_type;
afd1a0c9	301	struct IR_i2c *ir;
b7df3910	302	struct input_dev *input_dev;
1da177e4	303
674434c6	304	ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
b7df3910 DT	305	input_dev = input_allocate_device();
b7df3910 DT	306	if (!ir \|\| !input_dev) {
b7df3910	307	input_free_device(input_dev);
d21838dd	308	kfree(ir);
afd1a0c9	309	return -ENOMEM;
b7df3910	310	}
d21838dd	311	memset(ir,0,sizeof(*ir));
b7df3910	312
1da177e4	313	ir->c = client_template;
b7df3910	314	ir->input = input_dev;
1da177e4	315
1da177e4 LT	316	ir->c.adapter = adap;
	317	ir->c.addr = addr;
	318
d21838dd MCC	319	i2c_set_clientdata(&ir->c, ir);
d21838dd MCC	320
1da177e4 LT	321	switch(addr) {
	322	case 0x64:
	323	name = "Pixelview";
	324	ir->get_key = get_key_pixelview;
	325	ir_type = IR_TYPE_OTHER;
	326	ir_codes = ir_codes_empty;
	327	break;
	328	case 0x4b:
	329	name = "PV951";
	330	ir->get_key = get_key_pv951;
	331	ir_type = IR_TYPE_OTHER;
	332	ir_codes = ir_codes_pv951;
	333	break;
	334	case 0x18:
	335	case 0x1a:
	336	name = "Hauppauge";
	337	ir->get_key = get_key_haup;
	338	ir_type = IR_TYPE_RC5;
	339	ir_codes = ir_codes_rc5_tv;
	340	break;
	341	case 0x30:
d5e52653 MCC	342	name = "KNC One";
	343	ir->get_key = get_key_knc1;
	344	ir_type = IR_TYPE_OTHER;
	345	ir_codes = ir_codes_empty;
1da177e4 LT	346	break;
1da177e4 LT	347	case 0x7a:
ac9cd976 RC	348	case 0x47:
	349	/* Handled by saa7134-input */
	350	name = "SAA713x remote";
d5e52653	351	ir_type = IR_TYPE_OTHER;
1da177e4 LT	352	break;
	353	default:
	354	/* shouldn't happen */
	355	printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
	356	kfree(ir);
	357	return -1;
	358	}
	359
ac9cd976	360	/* Sets name */
1da177e4	361	snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
d5e52653 MCC	362	ir->ir_codes=ir_codes;
	363
	364	/* register i2c device
	365	* At device register, IR codes may be changed to be
	366	* board dependent.
674434c6	367	*/
d5e52653	368	i2c_attach_client(&ir->c);
1da177e4	369
ac9cd976 RC	370	/* If IR not supported or disabled, unregisters driver */
	371	if (ir->get_key == NULL) {
	372	i2c_detach_client(&ir->c);
	373	kfree(ir);
	374	return -1;
	375	}
	376
	377	/* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
	378	snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
	379	ir->c.adapter->dev.bus_id,
	380	ir->c.dev.bus_id);
	381
1da177e4	382	/* init + register input device */
d21838dd MCC	383	ir_input_init(input_dev,&ir->ir,ir_type,ir->ir_codes);
	384	input_dev->id.bustype = BUS_I2C;
	385	input_dev->name = ir->c.name;
	386	input_dev->phys = ir->phys;
b7df3910	387
d5e52653	388	/* register event device */
b7df3910	389	input_register_device(ir->input);
d21838dd MCC	390	printk(DEVNAME ": %s detected at %s [%s]\n",
d21838dd MCC	391	ir->input->name,ir->input->phys,adap->name);
1da177e4 LT	392
	393	/* start polling via eventd */
	394	INIT_WORK(&ir->work, ir_work, ir);
	395	init_timer(&ir->timer);
	396	ir->timer.function = ir_timer;
	397	ir->timer.data = (unsigned long)ir;
	398	schedule_work(&ir->work);
	399
	400	return 0;
	401	}
	402
	403	static int ir_detach(struct i2c_client *client)
	404	{
4ac97914	405	struct IR_i2c *ir = i2c_get_clientdata(client);
1da177e4 LT	406
	407	/* kill outstanding polls */
	408	del_timer(&ir->timer);
	409	flush_scheduled_work();
	410
	411	/* unregister devices */
b7df3910	412	input_unregister_device(ir->input);
1da177e4 LT	413	i2c_detach_client(&ir->c);
	414
	415	/* free memory */
	416	kfree(ir);
	417	return 0;
	418	}
	419
	420	static int ir_probe(struct i2c_adapter *adap)
	421	{
	422
	423	/* The external IR receiver is at i2c address 0x34 (0x35 for
	424	reads). Future Hauppauge cards will have an internal
	425	receiver at 0x30 (0x31 for reads). In theory, both can be
	426	fitted, and Hauppauge suggest an external overrides an
	427	internal.
	428
	429	That's why we probe 0x1a (~0x34) first. CB
	430	*/
	431
	432	static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
c2f6f9d8	433	static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
b296fc60	434	static const int probe_em28XX[] = { 0x30, 0x47, -1 };
1da177e4	435	const int *probe = NULL;
4f9c05aa MCC	436	struct i2c_client c;
	437	unsigned char buf;
	438	int i,rc;
1da177e4 LT	439
1da177e4 LT	440	switch (adap->id) {
c7a46533	441	case I2C_HW_B_BT848:
1da177e4 LT	442	probe = probe_bttv;
1da177e4 LT	443	break;
1684a984	444	case I2C_HW_SAA7134:
1da177e4 LT	445	probe = probe_saa7134;
1da177e4 LT	446	break;
b296fc60 MCC	447	case I2C_HW_B_EM28XX:
b296fc60 MCC	448	probe = probe_em28XX;
c365864f	449	break;
1da177e4 LT	450	}
	451	if (NULL == probe)
	452	return 0;
	453
	454	memset(&c,0,sizeof(c));
	455	c.adapter = adap;
d5e52653	456	for (i = 0; -1 != probe[i]; i++) {
1da177e4	457	c.addr = probe[i];
d5e52653	458	rc = i2c_master_recv(&c,&buf,0);
1da177e4 LT	459	dprintk(1,"probe 0x%02x @ %s: %s\n",
1da177e4 LT	460	probe[i], adap->name,
d5e52653 MCC	461	(0 == rc) ? "yes" : "no");
	462	if (0 == rc) {
	463	ir_attach(adap,probe[i],0,0);
	464	break;
1da177e4 LT	465	}
	466	}
	467	return 0;
	468	}
	469
	470	/* ----------------------------------------------------------------------- */
	471
	472	MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
	473	MODULE_DESCRIPTION("input driver for i2c IR remote controls");
	474	MODULE_LICENSE("GPL");
	475
	476	static int __init ir_init(void)
	477	{
	478	return i2c_add_driver(&driver);
	479	}
	480
	481	static void __exit ir_fini(void)
	482	{
	483	i2c_del_driver(&driver);
	484	}
	485
	486	module_init(ir_init);
	487	module_exit(ir_fini);
	488
	489	/*
	490	* Overrides for Emacs so that we follow Linus's tabbing style.
	491	* ---------------------------------------------------------------------------
	492	* Local variables:
	493	* c-basic-offset: 8
	494	* End:
	495	*/