drivers/media/video/ir-kbd-i2c.c - kernel/msm-4.9 - Gitiles

 /*
  *
  * 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>
  * modified for DViCO Fusion HDTV 5 RT GOLD by
  *      Chaogui Zhang <czhang1974@gmail.com>
  * modified for MSI TV@nywhere Plus by
  *      Henry Wong <henry@stuffedcow.net>
  *      Mark Schultz <n9xmj@yahoo.com>
  *      Brian Rogers <brian_rogers@comcast.net>
  * modified for AVerMedia Cardbus by
  *      Oldrich Jedlicka <oldium.pro@seznam.cz>
  *
  *  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/init.h>
 #include <linux/kernel.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 <media/rc-core.h>
 #include <media/ir-kbd-i2c.h>

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

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


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

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

 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
 			       int size, int offset)
 {
 	unsigned char buf[6];
 	int start, range, toggle, dev, code, ircode;

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

 	/* split rc5 data block ... */
 	start  = (buf[offset] >> 7) &    1;
 	range  = (buf[offset] >> 6) &    1;
 	toggle = (buf[offset] >> 5) &    1;
 	dev    =  buf[offset]       & 0x1f;
 	code   = (buf[offset+1] >> 2) & 0x3f;

 	/* rc5 has two start bits
 	 * the first bit must be one
 	 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
 	 */
 	if (!start)
 		/* no key pressed */
 		return 0;
 	/*
 	 * Hauppauge remotes (black/silver) always use
 	 * specific device ids. If we do not filter the
 	 * device ids then messages destined for devices
 	 * such as TVs (id=0) will get through causing
 	 * mis-fired events.
 	 *
 	 * We also filter out invalid key presses which
 	 * produce annoying debug log entries.
 	 */
 	ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
 	if ((ircode & 0x1fff)==0x1fff)
 		/* invalid key press */
 		return 0;

 	if (!range)
 		code += 64;

 	dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
 		start, range, toggle, dev, code);

 	/* return key */
 	*ir_key = (dev << 8) | code;
 	*ir_raw = ircode;
 	return 1;
 }

 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 {
 	return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
 }

 static int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 {
 	int ret;
 	unsigned char buf[1] = { 0 };

 	/*
 	 * This is the same apparent "are you ready?" poll command observed
 	 * watching Windows driver traffic and implemented in lirc_zilog. With
 	 * this added, we get far saner remote behavior with z8 chips on usb
 	 * connected devices, even with the default polling interval of 100ms.
 	 */
 	ret = i2c_master_send(ir->c, buf, 1);
 	if (ret != 1)
 		return (ret < 0) ? ret : -EINVAL;

 	return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
 }

 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_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 {
 	unsigned char buf[4];

 	/* poll IR chip */
 	if (4 != i2c_master_recv(ir->c, buf, 4)) {
 		dprintk(1,"read error\n");
 		return -EIO;
 	}

 	if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
 		dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
 			buf[0], buf[1], buf[2], buf[3]);

 	/* no key pressed or signal from other ir remote */
 	if(buf[0] != 0x1 ||  buf[1] != 0xfe)
 		return 0;

 	*ir_key = buf[2];
 	*ir_raw = (buf[2] << 8) | buf[3];

 	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;
 }

 static int get_key_avermedia_cardbus(struct IR_i2c *ir,
 				     u32 *ir_key, u32 *ir_raw)
 {
 	unsigned char subaddr, key, keygroup;
 	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
 				   .buf = &subaddr, .len = 1},
 				 { .addr = ir->c->addr, .flags = I2C_M_RD,
 				  .buf = &key, .len = 1} };
 	subaddr = 0x0d;
 	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
 		dprintk(1, "read error\n");
 		return -EIO;
 	}

 	if (key == 0xff)
 		return 0;

 	subaddr = 0x0b;
 	msg[1].buf = &keygroup;
 	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
 		dprintk(1, "read error\n");
 		return -EIO;
 	}

 	if (keygroup == 0xff)
 		return 0;

 	dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
 	if (keygroup < 2 || keygroup > 3) {
 		/* Only a warning */
 		dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
 								keygroup, key);
 	}
 	key |= (keygroup & 1) << 6;

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

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

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

 	dprintk(3, "%s\n", __func__);
 	rc = ir->get_key(ir, &ir_key, &ir_raw);
 	if (rc < 0) {
 		dprintk(2,"error\n");
 		return;
 	}

 	if (rc) {
 		dprintk(1, "%s: keycode = 0x%04x\n", __func__, ir_key);
 		rc_keydown(ir->rc, ir_key, 0);
 	}
 }

 static void ir_work(struct work_struct *work)
 {
 	struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);

 	ir_key_poll(ir);
 	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
 }

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

 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
 	char *ir_codes = NULL;
 	const char *name = NULL;
 	u64 rc_type = RC_TYPE_UNKNOWN;
 	struct IR_i2c *ir;
 	struct rc_dev *rc = NULL;
 	struct i2c_adapter *adap = client->adapter;
 	unsigned short addr = client->addr;
 	int err;

 	ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
 	if (!ir)
 		return -ENOMEM;

 	ir->c = client;
 	ir->polling_interval = DEFAULT_POLLING_INTERVAL;
 	i2c_set_clientdata(client, ir);

 	switch(addr) {
 	case 0x64:
 		name        = "Pixelview";
 		ir->get_key = get_key_pixelview;
 		rc_type     = RC_TYPE_OTHER;
 		ir_codes    = RC_MAP_EMPTY;
 		break;
 	case 0x18:
 	case 0x1f:
 	case 0x1a:
 		name        = "Hauppauge";
 		ir->get_key = get_key_haup;
 		rc_type     = RC_TYPE_RC5;
 		ir_codes    = RC_MAP_HAUPPAUGE;
 		break;
 	case 0x30:
 		name        = "KNC One";
 		ir->get_key = get_key_knc1;
 		rc_type     = RC_TYPE_OTHER;
 		ir_codes    = RC_MAP_EMPTY;
 		break;
 	case 0x6b:
 		name        = "FusionHDTV";
 		ir->get_key = get_key_fusionhdtv;
 		rc_type     = RC_TYPE_RC5;
 		ir_codes    = RC_MAP_FUSIONHDTV_MCE;
 		break;
 	case 0x40:
 		name        = "AVerMedia Cardbus remote";
 		ir->get_key = get_key_avermedia_cardbus;
 		rc_type     = RC_TYPE_OTHER;
 		ir_codes    = RC_MAP_AVERMEDIA_CARDBUS;
 		break;
 	case 0x71:
 		name        = "Hauppauge/Zilog Z8";
 		ir->get_key = get_key_haup_xvr;
 		rc_type     = RC_TYPE_RC5;
 		ir_codes    = RC_MAP_HAUPPAUGE;
 		break;
 	}

 	/* Let the caller override settings */
 	if (client->dev.platform_data) {
 		const struct IR_i2c_init_data *init_data =
 						client->dev.platform_data;

 		ir_codes = init_data->ir_codes;
 		rc = init_data->rc_dev;

 		name = init_data->name;
 		if (init_data->type)
 			rc_type = init_data->type;

 		if (init_data->polling_interval)
 			ir->polling_interval = init_data->polling_interval;

 		switch (init_data->internal_get_key_func) {
 		case IR_KBD_GET_KEY_CUSTOM:
 			/* The bridge driver provided us its own function */
 			ir->get_key = init_data->get_key;
 			break;
 		case IR_KBD_GET_KEY_PIXELVIEW:
 			ir->get_key = get_key_pixelview;
 			break;
 		case IR_KBD_GET_KEY_HAUP:
 			ir->get_key = get_key_haup;
 			break;
 		case IR_KBD_GET_KEY_KNC1:
 			ir->get_key = get_key_knc1;
 			break;
 		case IR_KBD_GET_KEY_FUSIONHDTV:
 			ir->get_key = get_key_fusionhdtv;
 			break;
 		case IR_KBD_GET_KEY_HAUP_XVR:
 			ir->get_key = get_key_haup_xvr;
 			break;
 		case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
 			ir->get_key = get_key_avermedia_cardbus;
 			break;
 		}
 	}

 	if (!rc) {
 		/*
 		 * If platform_data doesn't specify rc_dev, initilize it
 		 * internally
 		 */
 		rc = rc_allocate_device();
 		if (!rc) {
 			err = -ENOMEM;
 			goto err_out_free;
 		}
 	}
 	ir->rc = rc;

 	/* Make sure we are all setup before going on */
 	if (!name || !ir->get_key || !rc_type || !ir_codes) {
 		dprintk(1, ": Unsupported device at address 0x%02x\n",
 			addr);
 		err = -ENODEV;
 		goto err_out_free;
 	}

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

 	snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
 		 dev_name(&adap->dev),
 		 dev_name(&client->dev));

 	/*
 	 * Initialize input_dev fields
 	 * It doesn't make sense to allow overriding them via platform_data
 	 */
 	rc->input_id.bustype = BUS_I2C;
 	rc->input_phys       = ir->phys;
 	rc->input_name	     = ir->name;

 	/*
 	 * Initialize the other fields of rc_dev
 	 */
 	rc->map_name       = ir->ir_codes;
 	rc->allowed_protos = rc_type;
 	if (!rc->driver_name)
 		rc->driver_name = MODULE_NAME;

 	err = rc_register_device(rc);
 	if (err)
 		goto err_out_free;

 	printk(MODULE_NAME ": %s detected at %s [%s]\n",
 	       ir->name, ir->phys, adap->name);

 	/* start polling via eventd */
 	INIT_DELAYED_WORK(&ir->work, ir_work);
 	schedule_delayed_work(&ir->work, 0);

 	return 0;

  err_out_free:
 	/* Only frees rc if it were allocated internally */
 	rc_free_device(rc);
 	kfree(ir);
 	return err;
 }

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

 	/* kill outstanding polls */
 	cancel_delayed_work_sync(&ir->work);

 	/* unregister device */
 	rc_unregister_device(ir->rc);

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

 static const struct i2c_device_id ir_kbd_id[] = {
 	/* Generic entry for any IR receiver */
 	{ "ir_video", 0 },
 	/* IR device specific entries should be added here */
 	{ "ir_rx_z8f0811_haup", 0 },
 	{ "ir_rx_z8f0811_hdpvr", 0 },
 	{ }
 };

 static struct i2c_driver driver = {
 	.driver = {
 		.name   = "ir-kbd-i2c",
 	},
 	.probe          = ir_probe,
 	.remove         = ir_remove,
 	.id_table       = ir_kbd_id,
 };

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

 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:
  */
	/*
	*
	* 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>
	* modified for DViCO Fusion HDTV 5 RT GOLD by
	* Chaogui Zhang <czhang1974@gmail.com>
	* modified for MSI TV@nywhere Plus by
	* Henry Wong <henry@stuffedcow.net>
	* Mark Schultz <n9xmj@yahoo.com>
	* Brian Rogers <brian_rogers@comcast.net>
	* modified for AVerMedia Cardbus by
	* Oldrich Jedlicka <oldium.pro@seznam.cz>
	*
	* 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/init.h>
	#include <linux/kernel.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 <media/rc-core.h>
	#include <media/ir-kbd-i2c.h>

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

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


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

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

	static int get_key_haup_common(struct IR_i2c ir, u32 ir_key, u32 *ir_raw,
	int size, int offset)
	{
	unsigned char buf[6];
	int start, range, toggle, dev, code, ircode;

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

	/* split rc5 data block ... */
	start = (buf[offset] >> 7) & 1;
	range = (buf[offset] >> 6) & 1;
	toggle = (buf[offset] >> 5) & 1;
	dev = buf[offset] & 0x1f;
	code = (buf[offset+1] >> 2) & 0x3f;

	/* rc5 has two start bits
	* the first bit must be one
	* the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
	*/
	if (!start)
	/* no key pressed */
	return 0;
	/*
	* Hauppauge remotes (black/silver) always use
	* specific device ids. If we do not filter the
	* device ids then messages destined for devices
	* such as TVs (id=0) will get through causing
	* mis-fired events.
	*
	* We also filter out invalid key presses which
	* produce annoying debug log entries.
	*/
	ircode= (start << 12) \| (toggle << 11) \| (dev << 6) \| code;
	if ((ircode & 0x1fff)==0x1fff)
	/* invalid key press */
	return 0;

	if (!range)
	code += 64;

	dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
	start, range, toggle, dev, code);

	/* return key */
	*ir_key = (dev << 8) \| code;
	*ir_raw = ircode;
	return 1;
	}

	static int get_key_haup(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	{
	return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
	}

	static int get_key_haup_xvr(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	{
	int ret;
	unsigned char buf[1] = { 0 };

	/*
	* This is the same apparent "are you ready?" poll command observed
	* watching Windows driver traffic and implemented in lirc_zilog. With
	* this added, we get far saner remote behavior with z8 chips on usb
	* connected devices, even with the default polling interval of 100ms.
	*/
	ret = i2c_master_send(ir->c, buf, 1);
	if (ret != 1)
	return (ret < 0) ? ret : -EINVAL;

	return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
	}

	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_fusionhdtv(struct IR_i2c ir, u32 ir_key, u32 *ir_raw)
	{
	unsigned char buf[4];

	/* poll IR chip */
	if (4 != i2c_master_recv(ir->c, buf, 4)) {
	dprintk(1,"read error\n");
	return -EIO;
	}

	if(buf[0] !=0 \|\| buf[1] !=0 \|\| buf[2] !=0 \|\| buf[3] != 0)
	dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
	buf[0], buf[1], buf[2], buf[3]);

	/* no key pressed or signal from other ir remote */
	if(buf[0] != 0x1 \|\| buf[1] != 0xfe)
	return 0;

	*ir_key = buf[2];
	*ir_raw = (buf[2] << 8) \| buf[3];

	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;
	}

	static int get_key_avermedia_cardbus(struct IR_i2c *ir,
	u32 ir_key, u32 ir_raw)
	{
	unsigned char subaddr, key, keygroup;
	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
	.buf = &subaddr, .len = 1},
	{ .addr = ir->c->addr, .flags = I2C_M_RD,
	.buf = &key, .len = 1} };
	subaddr = 0x0d;
	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	dprintk(1, "read error\n");
	return -EIO;
	}

	if (key == 0xff)
	return 0;

	subaddr = 0x0b;
	msg[1].buf = &keygroup;
	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
	dprintk(1, "read error\n");
	return -EIO;
	}

	if (keygroup == 0xff)
	return 0;

	dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
	if (keygroup < 2 \|\| keygroup > 3) {
	/* Only a warning */
	dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
	keygroup, key);
	}
	key \|= (keygroup & 1) << 6;

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

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

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

	dprintk(3, "%s\n", __func__);
	rc = ir->get_key(ir, &ir_key, &ir_raw);
	if (rc < 0) {
	dprintk(2,"error\n");
	return;
	}

	if (rc) {
	dprintk(1, "%s: keycode = 0x%04x\n", __func__, ir_key);
	rc_keydown(ir->rc, ir_key, 0);
	}
	}

	static void ir_work(struct work_struct *work)
	{
	struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);

	ir_key_poll(ir);
	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
	}

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

	static int ir_probe(struct i2c_client client, const struct i2c_device_id id)
	{
	char *ir_codes = NULL;
	const char *name = NULL;
	u64 rc_type = RC_TYPE_UNKNOWN;
	struct IR_i2c *ir;
	struct rc_dev *rc = NULL;
	struct i2c_adapter *adap = client->adapter;
	unsigned short addr = client->addr;
	int err;

	ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
	if (!ir)
	return -ENOMEM;

	ir->c = client;
	ir->polling_interval = DEFAULT_POLLING_INTERVAL;
	i2c_set_clientdata(client, ir);

	switch(addr) {
	case 0x64:
	name = "Pixelview";
	ir->get_key = get_key_pixelview;
	rc_type = RC_TYPE_OTHER;
	ir_codes = RC_MAP_EMPTY;
	break;
	case 0x18:
	case 0x1f:
	case 0x1a:
	name = "Hauppauge";
	ir->get_key = get_key_haup;
	rc_type = RC_TYPE_RC5;
	ir_codes = RC_MAP_HAUPPAUGE;
	break;
	case 0x30:
	name = "KNC One";
	ir->get_key = get_key_knc1;
	rc_type = RC_TYPE_OTHER;
	ir_codes = RC_MAP_EMPTY;
	break;
	case 0x6b:
	name = "FusionHDTV";
	ir->get_key = get_key_fusionhdtv;
	rc_type = RC_TYPE_RC5;
	ir_codes = RC_MAP_FUSIONHDTV_MCE;
	break;
	case 0x40:
	name = "AVerMedia Cardbus remote";
	ir->get_key = get_key_avermedia_cardbus;
	rc_type = RC_TYPE_OTHER;
	ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
	break;
	case 0x71:
	name = "Hauppauge/Zilog Z8";
	ir->get_key = get_key_haup_xvr;
	rc_type = RC_TYPE_RC5;
	ir_codes = RC_MAP_HAUPPAUGE;
	break;
	}

	/* Let the caller override settings */
	if (client->dev.platform_data) {
	const struct IR_i2c_init_data *init_data =
	client->dev.platform_data;

	ir_codes = init_data->ir_codes;
	rc = init_data->rc_dev;

	name = init_data->name;
	if (init_data->type)
	rc_type = init_data->type;

	if (init_data->polling_interval)
	ir->polling_interval = init_data->polling_interval;

	switch (init_data->internal_get_key_func) {
	case IR_KBD_GET_KEY_CUSTOM:
	/* The bridge driver provided us its own function */
	ir->get_key = init_data->get_key;
	break;
	case IR_KBD_GET_KEY_PIXELVIEW:
	ir->get_key = get_key_pixelview;
	break;
	case IR_KBD_GET_KEY_HAUP:
	ir->get_key = get_key_haup;
	break;
	case IR_KBD_GET_KEY_KNC1:
	ir->get_key = get_key_knc1;
	break;
	case IR_KBD_GET_KEY_FUSIONHDTV:
	ir->get_key = get_key_fusionhdtv;
	break;
	case IR_KBD_GET_KEY_HAUP_XVR:
	ir->get_key = get_key_haup_xvr;
	break;
	case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
	ir->get_key = get_key_avermedia_cardbus;
	break;
	}
	}

	if (!rc) {
	/*
	* If platform_data doesn't specify rc_dev, initilize it
	* internally
	*/
	rc = rc_allocate_device();
	if (!rc) {
	err = -ENOMEM;
	goto err_out_free;
	}
	}
	ir->rc = rc;

	/* Make sure we are all setup before going on */
	if (!name \|\| !ir->get_key \|\| !rc_type \|\| !ir_codes) {
	dprintk(1, ": Unsupported device at address 0x%02x\n",
	addr);
	err = -ENODEV;
	goto err_out_free;
	}

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

	snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
	dev_name(&adap->dev),
	dev_name(&client->dev));

	/*
	* Initialize input_dev fields
	* It doesn't make sense to allow overriding them via platform_data
	*/
	rc->input_id.bustype = BUS_I2C;
	rc->input_phys = ir->phys;
	rc->input_name = ir->name;

	/*
	* Initialize the other fields of rc_dev
	*/
	rc->map_name = ir->ir_codes;
	rc->allowed_protos = rc_type;
	if (!rc->driver_name)
	rc->driver_name = MODULE_NAME;

	err = rc_register_device(rc);
	if (err)
	goto err_out_free;

	printk(MODULE_NAME ": %s detected at %s [%s]\n",
	ir->name, ir->phys, adap->name);

	/* start polling via eventd */
	INIT_DELAYED_WORK(&ir->work, ir_work);
	schedule_delayed_work(&ir->work, 0);

	return 0;

	err_out_free:
	/* Only frees rc if it were allocated internally */
	rc_free_device(rc);
	kfree(ir);
	return err;
	}

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

	/* kill outstanding polls */
	cancel_delayed_work_sync(&ir->work);

	/* unregister device */
	rc_unregister_device(ir->rc);

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

	static const struct i2c_device_id ir_kbd_id[] = {
	/* Generic entry for any IR receiver */
	{ "ir_video", 0 },
	/* IR device specific entries should be added here */
	{ "ir_rx_z8f0811_haup", 0 },
	{ "ir_rx_z8f0811_hdpvr", 0 },
	{ }
	};

	static struct i2c_driver driver = {
	.driver = {
	.name = "ir-kbd-i2c",
	},
	.probe = ir_probe,
	.remove = ir_remove,
	.id_table = ir_kbd_id,
	};

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

	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:
	*/