[deliverable/linux.git] / drivers / media / rc / ir-lirc-codec.c

/* ir-lirc-codec.c - rc-core to classic lirc interface bridge
 *
 * Copyright (C) 2010 by Jarod Wilson <jarod@redhat.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 version 2 of the License.
 *
 *  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.
 */

#include <linux/sched.h>
#include <linux/wait.h>
#include <media/lirc.h>
#include <media/lirc_dev.h>
#include <media/rc-core.h>
#include "rc-core-priv.h"

#define LIRCBUF_SIZE 256

/**
 * ir_lirc_decode() - Send raw IR data to lirc_dev to be relayed to the
 *		      lircd userspace daemon for decoding.
 * @input_dev:	the struct rc_dev descriptor of the device
 * @duration:	the struct ir_raw_event descriptor of the pulse/space
 *
 * This function returns -EINVAL if the lirc interfaces aren't wired up.
 */
static int ir_lirc_decode(struct rc_dev *dev, struct ir_raw_event ev)
{
	struct lirc_codec *lirc = &dev->raw->lirc;
	int sample;

	if (!(dev->raw->enabled_protocols & RC_TYPE_LIRC))
		return 0;

	if (!dev->raw->lirc.drv || !dev->raw->lirc.drv->rbuf)
		return -EINVAL;

	/* Packet start */
	if (ev.reset)
		return 0;

	/* Carrier reports */
	if (ev.carrier_report) {
		sample = LIRC_FREQUENCY(ev.carrier);
		IR_dprintk(2, "carrier report (freq: %d)\n", sample);

	/* Packet end */
	} else if (ev.timeout) {

		if (lirc->gap)
			return 0;

		lirc->gap_start = ktime_get();
		lirc->gap = true;
		lirc->gap_duration = ev.duration;

		if (!lirc->send_timeout_reports)
			return 0;

		sample = LIRC_TIMEOUT(ev.duration / 1000);
		IR_dprintk(2, "timeout report (duration: %d)\n", sample);

	/* Normal sample */
	} else {

		if (lirc->gap) {
			int gap_sample;

			lirc->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
				lirc->gap_start));

			/* Convert to ms and cap by LIRC_VALUE_MASK */
			do_div(lirc->gap_duration, 1000);
			lirc->gap_duration = min(lirc->gap_duration,
							(u64)LIRC_VALUE_MASK);

			gap_sample = LIRC_SPACE(lirc->gap_duration);
			lirc_buffer_write(dev->raw->lirc.drv->rbuf,
						(unsigned char *) &gap_sample);
			lirc->gap = false;
		}

		sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) :
					LIRC_SPACE(ev.duration / 1000);
		IR_dprintk(2, "delivering %uus %s to lirc_dev\n",
			   TO_US(ev.duration), TO_STR(ev.pulse));
	}

	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
			  (unsigned char *) &sample);
	wake_up(&dev->raw->lirc.drv->rbuf->wait_poll);

	return 0;
}

static ssize_t ir_lirc_transmit_ir(struct file *file, const char *buf,
				   size_t n, loff_t *ppos)
{
	struct lirc_codec *lirc;
	struct rc_dev *dev;
	unsigned int *txbuf; /* buffer with values to transmit */
	ssize_t ret = 0;
	size_t count;

	lirc = lirc_get_pdata(file);
	if (!lirc)
		return -EFAULT;

	if (n < sizeof(unsigned) || n % sizeof(unsigned))
		return -EINVAL;

	count = n / sizeof(unsigned);
	if (count > LIRCBUF_SIZE || count % 2 == 0)
		return -EINVAL;

	txbuf = memdup_user(buf, n);
	if (IS_ERR(txbuf))
		return PTR_ERR(txbuf);

	dev = lirc->dev;
	if (!dev) {
		ret = -EFAULT;
		goto out;
	}

	if (dev->tx_ir)
		ret = dev->tx_ir(dev, txbuf, count);

	if (ret > 0)
		ret *= sizeof(unsigned);

out:
	kfree(txbuf);
	return ret;
}

static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
			unsigned long __user arg)
{
	struct lirc_codec *lirc;
	struct rc_dev *dev;
	int ret = 0;
	__u32 val = 0, tmp;

	lirc = lirc_get_pdata(filep);
	if (!lirc)
		return -EFAULT;

	dev = lirc->dev;
	if (!dev)
		return -EFAULT;

	if (_IOC_DIR(cmd) & _IOC_WRITE) {
		ret = get_user(val, (__u32 *)arg);
		if (ret)
			return ret;
	}

	switch (cmd) {

	/* legacy support */
	case LIRC_GET_SEND_MODE:
		val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
		break;

	case LIRC_SET_SEND_MODE:
		if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
			return -EINVAL;
		return 0;

	/* TX settings */
	case LIRC_SET_TRANSMITTER_MASK:
		if (!dev->s_tx_mask)
			return -EINVAL;

		return dev->s_tx_mask(dev, val);

	case LIRC_SET_SEND_CARRIER:
		if (!dev->s_tx_carrier)
			return -EINVAL;

		return dev->s_tx_carrier(dev, val);

	case LIRC_SET_SEND_DUTY_CYCLE:
		if (!dev->s_tx_duty_cycle)
			return -ENOSYS;

		if (val <= 0 || val >= 100)
			return -EINVAL;

		return dev->s_tx_duty_cycle(dev, val);

	/* RX settings */
	case LIRC_SET_REC_CARRIER:
		if (!dev->s_rx_carrier_range)
			return -ENOSYS;

		if (val <= 0)
			return -EINVAL;

		return dev->s_rx_carrier_range(dev,
					       dev->raw->lirc.carrier_low,
					       val);

	case LIRC_SET_REC_CARRIER_RANGE:
		if (val <= 0)
			return -EINVAL;

		dev->raw->lirc.carrier_low = val;
		return 0;

	case LIRC_GET_REC_RESOLUTION:
		val = dev->rx_resolution;
		break;

	case LIRC_SET_WIDEBAND_RECEIVER:
		if (!dev->s_learning_mode)
			return -ENOSYS;

		return dev->s_learning_mode(dev, !!val);

	case LIRC_SET_MEASURE_CARRIER_MODE:
		if (!dev->s_carrier_report)
			return -ENOSYS;

		return dev->s_carrier_report(dev, !!val);

	/* Generic timeout support */
	case LIRC_GET_MIN_TIMEOUT:
		if (!dev->max_timeout)
			return -ENOSYS;
		val = dev->min_timeout / 1000;
		break;

	case LIRC_GET_MAX_TIMEOUT:
		if (!dev->max_timeout)
			return -ENOSYS;
		val = dev->max_timeout / 1000;
		break;

	case LIRC_SET_REC_TIMEOUT:
		if (!dev->max_timeout)
			return -ENOSYS;

		tmp = val * 1000;

		if (tmp < dev->min_timeout ||
		    tmp > dev->max_timeout)
				return -EINVAL;

		dev->timeout = tmp;
		break;

	case LIRC_SET_REC_TIMEOUT_REPORTS:
		lirc->send_timeout_reports = !!val;
		break;

	default:
		return lirc_dev_fop_ioctl(filep, cmd, arg);
	}

	if (_IOC_DIR(cmd) & _IOC_READ)
		ret = put_user(val, (__u32 *)arg);

	return ret;
}

static int ir_lirc_open(void *data)
{
	return 0;
}

static void ir_lirc_close(void *data)
{
	return;
}

static struct file_operations lirc_fops = {
	.owner		= THIS_MODULE,
	.write		= ir_lirc_transmit_ir,
	.unlocked_ioctl	= ir_lirc_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= ir_lirc_ioctl,
#endif
	.read		= lirc_dev_fop_read,
	.poll		= lirc_dev_fop_poll,
	.open		= lirc_dev_fop_open,
	.release	= lirc_dev_fop_close,
	.llseek		= no_llseek,
};

static int ir_lirc_register(struct rc_dev *dev)
{
	struct lirc_driver *drv;
	struct lirc_buffer *rbuf;
	int rc = -ENOMEM;
	unsigned long features;

	drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
	if (!drv)
		return rc;

	rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
	if (!rbuf)
		goto rbuf_alloc_failed;

	rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
	if (rc)
		goto rbuf_init_failed;

	features = LIRC_CAN_REC_MODE2;
	if (dev->tx_ir) {
		features |= LIRC_CAN_SEND_PULSE;
		if (dev->s_tx_mask)
			features |= LIRC_CAN_SET_TRANSMITTER_MASK;
		if (dev->s_tx_carrier)
			features |= LIRC_CAN_SET_SEND_CARRIER;
		if (dev->s_tx_duty_cycle)
			features |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
	}

	if (dev->s_rx_carrier_range)
		features |= LIRC_CAN_SET_REC_CARRIER |
			LIRC_CAN_SET_REC_CARRIER_RANGE;

	if (dev->s_learning_mode)
		features |= LIRC_CAN_USE_WIDEBAND_RECEIVER;

	if (dev->s_carrier_report)
		features |= LIRC_CAN_MEASURE_CARRIER;

	if (dev->max_timeout)
		features |= LIRC_CAN_SET_REC_TIMEOUT;

	snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
		 dev->driver_name);
	drv->minor = -1;
	drv->features = features;
	drv->data = &dev->raw->lirc;
	drv->rbuf = rbuf;
	drv->set_use_inc = &ir_lirc_open;
	drv->set_use_dec = &ir_lirc_close;
	drv->code_length = sizeof(struct ir_raw_event) * 8;
	drv->fops = &lirc_fops;
	drv->dev = &dev->dev;
	drv->owner = THIS_MODULE;

	drv->minor = lirc_register_driver(drv);
	if (drv->minor < 0) {
		rc = -ENODEV;
		goto lirc_register_failed;
	}

	dev->raw->lirc.drv = drv;
	dev->raw->lirc.dev = dev;
	return 0;

lirc_register_failed:
rbuf_init_failed:
	kfree(rbuf);
rbuf_alloc_failed:
	kfree(drv);

	return rc;
}

static int ir_lirc_unregister(struct rc_dev *dev)
{
	struct lirc_codec *lirc = &dev->raw->lirc;

	lirc_unregister_driver(lirc->drv->minor);
	lirc_buffer_free(lirc->drv->rbuf);
	kfree(lirc->drv);

	return 0;
}

static struct ir_raw_handler lirc_handler = {
	.protocols	= RC_TYPE_LIRC,
	.decode		= ir_lirc_decode,
	.raw_register	= ir_lirc_register,
	.raw_unregister	= ir_lirc_unregister,
};

static int __init ir_lirc_codec_init(void)
{
	ir_raw_handler_register(&lirc_handler);

	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	return 0;
}

static void __exit ir_lirc_codec_exit(void)
{
	ir_raw_handler_unregister(&lirc_handler);
}

module_init(ir_lirc_codec_init);
module_exit(ir_lirc_codec_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
MODULE_DESCRIPTION("LIRC IR handler bridge");
Commit	Line	Data
457e2ffc	1	/* ir-lirc-codec.c - rc-core to classic lirc interface bridge
ca414698 JW	2	*
	3	* Copyright (C) 2010 by Jarod Wilson <jarod@redhat.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation version 2 of the License.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*/
	14
	15	#include <linux/sched.h>
	16	#include <linux/wait.h>
	17	#include <media/lirc.h>
5690085e	18	#include <media/lirc_dev.h>
6bda9644	19	#include <media/rc-core.h>
f62de675	20	#include "rc-core-priv.h"
ca414698 JW	21
	22	#define LIRCBUF_SIZE 256
	23
	24	/**
	25	* ir_lirc_decode() - Send raw IR data to lirc_dev to be relayed to the
	26	* lircd userspace daemon for decoding.
d8b4b582	27	* @input_dev: the struct rc_dev descriptor of the device
ca414698 JW	28	* @duration: the struct ir_raw_event descriptor of the pulse/space
	29	*
	30	* This function returns -EINVAL if the lirc interfaces aren't wired up.
	31	*/
d8b4b582	32	static int ir_lirc_decode(struct rc_dev *dev, struct ir_raw_event ev)
ca414698	33	{
d8b4b582	34	struct lirc_codec *lirc = &dev->raw->lirc;
510fcb70	35	int sample;
ca414698	36
52b66144	37	if (!(dev->raw->enabled_protocols & RC_TYPE_LIRC))
ca414698 JW	38	return 0;
ca414698 JW	39
d8b4b582	40	if (!dev->raw->lirc.drv \|\| !dev->raw->lirc.drv->rbuf)
ca414698 JW	41	return -EINVAL;
ca414698 JW	42
4651918a ML	43	/* Packet start */
4651918a ML	44	if (ev.reset)
510fcb70 ML	45	return 0;
510fcb70 ML	46
4651918a ML	47	/* Carrier reports */
	48	if (ev.carrier_report) {
	49	sample = LIRC_FREQUENCY(ev.carrier);
457e2ffc	50	IR_dprintk(2, "carrier report (freq: %d)\n", sample);
ca414698	51
4651918a ML	52	/* Packet end */
	53	} else if (ev.timeout) {
	54
	55	if (lirc->gap)
	56	return 0;
	57
	58	lirc->gap_start = ktime_get();
	59	lirc->gap = true;
	60	lirc->gap_duration = ev.duration;
	61
	62	if (!lirc->send_timeout_reports)
	63	return 0;
	64
	65	sample = LIRC_TIMEOUT(ev.duration / 1000);
457e2ffc	66	IR_dprintk(2, "timeout report (duration: %d)\n", sample);
4651918a ML	67
	68	/* Normal sample */
	69	} else {
	70
	71	if (lirc->gap) {
	72	int gap_sample;
	73
	74	lirc->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
	75	lirc->gap_start));
	76
	77	/* Convert to ms and cap by LIRC_VALUE_MASK */
	78	do_div(lirc->gap_duration, 1000);
	79	lirc->gap_duration = min(lirc->gap_duration,
	80	(u64)LIRC_VALUE_MASK);
	81
	82	gap_sample = LIRC_SPACE(lirc->gap_duration);
d8b4b582	83	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
4651918a ML	84	(unsigned char *) &gap_sample);
	85	lirc->gap = false;
	86	}
	87
	88	sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) :
	89	LIRC_SPACE(ev.duration / 1000);
457e2ffc JW	90	IR_dprintk(2, "delivering %uus %s to lirc_dev\n",
457e2ffc JW	91	TO_US(ev.duration), TO_STR(ev.pulse));
4651918a	92	}
ca414698	93
d8b4b582	94	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
510fcb70	95	(unsigned char *) &sample);
d8b4b582	96	wake_up(&dev->raw->lirc.drv->rbuf->wait_poll);
ca414698	97
ca414698 JW	98	return 0;
	99	}
	100
	101	static ssize_t ir_lirc_transmit_ir(struct file file, const char buf,
	102	size_t n, loff_t *ppos)
	103	{
	104	struct lirc_codec *lirc;
d8b4b582	105	struct rc_dev *dev;
5588dc2b DH	106	unsigned int txbuf; / buffer with values to transmit */
5588dc2b DH	107	ssize_t ret = 0;
4c8b8698	108	size_t count;
ca414698 JW	109
	110	lirc = lirc_get_pdata(file);
	111	if (!lirc)
	112	return -EFAULT;
	113
5588dc2b	114	if (n < sizeof(unsigned) \|\| n % sizeof(unsigned))
ca414698 JW	115	return -EINVAL;
ca414698 JW	116
5588dc2b DH	117	count = n / sizeof(unsigned);
5588dc2b DH	118	if (count > LIRCBUF_SIZE \|\| count % 2 == 0)
ca414698 JW	119	return -EINVAL;
ca414698 JW	120
6efb870a JW	121	txbuf = memdup_user(buf, n);
	122	if (IS_ERR(txbuf))
	123	return PTR_ERR(txbuf);
ca414698	124
d8b4b582 DH	125	dev = lirc->dev;
d8b4b582 DH	126	if (!dev) {
ca414698 JW	127	ret = -EFAULT;
	128	goto out;
	129	}
	130
d8b4b582	131	if (dev->tx_ir)
5588dc2b DH	132	ret = dev->tx_ir(dev, txbuf, count);
	133
	134	if (ret > 0)
	135	ret *= sizeof(unsigned);
ca414698 JW	136
	137	out:
	138	kfree(txbuf);
	139	return ret;
	140	}
	141
e589333f ML	142	static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
e589333f ML	143	unsigned long __user arg)
ca414698 JW	144	{
ca414698 JW	145	struct lirc_codec *lirc;
d8b4b582	146	struct rc_dev *dev;
ca414698	147	int ret = 0;
4651918a	148	__u32 val = 0, tmp;
ca414698 JW	149
	150	lirc = lirc_get_pdata(filep);
	151	if (!lirc)
	152	return -EFAULT;
	153
d8b4b582 DH	154	dev = lirc->dev;
d8b4b582 DH	155	if (!dev)
ca414698 JW	156	return -EFAULT;
ca414698 JW	157
e589333f	158	if (_IOC_DIR(cmd) & _IOC_WRITE) {
be1f985f	159	ret = get_user(val, (__u32 *)arg);
ca414698 JW	160	if (ret)
ca414698 JW	161	return ret;
e589333f ML	162	}
	163
	164	switch (cmd) {
	165
	166	/* legacy support */
	167	case LIRC_GET_SEND_MODE:
	168	val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
	169	break;
	170
	171	case LIRC_SET_SEND_MODE:
	172	if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
	173	return -EINVAL;
4651918a	174	return 0;
ca414698	175
e589333f ML	176	/* TX settings */
e589333f ML	177	case LIRC_SET_TRANSMITTER_MASK:
d8b4b582	178	if (!dev->s_tx_mask)
ca414698	179	return -EINVAL;
4651918a	180
d8b4b582	181	return dev->s_tx_mask(dev, val);
ca414698 JW	182
ca414698 JW	183	case LIRC_SET_SEND_CARRIER:
d8b4b582	184	if (!dev->s_tx_carrier)
ca414698	185	return -EINVAL;
4651918a	186
d8b4b582	187	return dev->s_tx_carrier(dev, val);
ca414698	188
e589333f	189	case LIRC_SET_SEND_DUTY_CYCLE:
d8b4b582	190	if (!dev->s_tx_duty_cycle)
e589333f ML	191	return -ENOSYS;
	192
	193	if (val <= 0 \|\| val >= 100)
	194	return -EINVAL;
	195
d8b4b582	196	return dev->s_tx_duty_cycle(dev, val);
ca414698	197
e589333f ML	198	/* RX settings */
e589333f ML	199	case LIRC_SET_REC_CARRIER:
d8b4b582	200	if (!dev->s_rx_carrier_range)
e589333f	201	return -ENOSYS;
ca414698	202
4651918a ML	203	if (val <= 0)
	204	return -EINVAL;
	205
d8b4b582 DH	206	return dev->s_rx_carrier_range(dev,
	207	dev->raw->lirc.carrier_low,
	208	val);
e589333f ML	209
e589333f ML	210	case LIRC_SET_REC_CARRIER_RANGE:
4651918a ML	211	if (val <= 0)
4651918a ML	212	return -EINVAL;
e589333f	213
d8b4b582	214	dev->raw->lirc.carrier_low = val;
4651918a	215	return 0;
e589333f ML	216
e589333f ML	217	case LIRC_GET_REC_RESOLUTION:
d8b4b582	218	val = dev->rx_resolution;
e589333f ML	219	break;
	220
	221	case LIRC_SET_WIDEBAND_RECEIVER:
d8b4b582	222	if (!dev->s_learning_mode)
e589333f ML	223	return -ENOSYS;
e589333f ML	224
d8b4b582	225	return dev->s_learning_mode(dev, !!val);
4651918a ML	226
4651918a ML	227	case LIRC_SET_MEASURE_CARRIER_MODE:
d8b4b582	228	if (!dev->s_carrier_report)
4651918a ML	229	return -ENOSYS;
4651918a ML	230
d8b4b582	231	return dev->s_carrier_report(dev, !!val);
4651918a	232
e589333f ML	233	/* Generic timeout support */
e589333f ML	234	case LIRC_GET_MIN_TIMEOUT:
d8b4b582	235	if (!dev->max_timeout)
e589333f	236	return -ENOSYS;
d8b4b582	237	val = dev->min_timeout / 1000;
e589333f ML	238	break;
	239
	240	case LIRC_GET_MAX_TIMEOUT:
d8b4b582	241	if (!dev->max_timeout)
e589333f	242	return -ENOSYS;
d8b4b582	243	val = dev->max_timeout / 1000;
e589333f ML	244	break;
	245
	246	case LIRC_SET_REC_TIMEOUT:
d8b4b582	247	if (!dev->max_timeout)
4651918a ML	248	return -ENOSYS;
	249
	250	tmp = val * 1000;
	251
d8b4b582 DH	252	if (tmp < dev->min_timeout \|\|
d8b4b582 DH	253	tmp > dev->max_timeout)
4651918a ML	254	return -EINVAL;
4651918a ML	255
d8b4b582	256	dev->timeout = tmp;
4651918a ML	257	break;
	258
	259	case LIRC_SET_REC_TIMEOUT_REPORTS:
	260	lirc->send_timeout_reports = !!val;
ca414698 JW	261	break;
	262
	263	default:
044e5878	264	return lirc_dev_fop_ioctl(filep, cmd, arg);
ca414698 JW	265	}
ca414698 JW	266
e589333f	267	if (_IOC_DIR(cmd) & _IOC_READ)
be1f985f	268	ret = put_user(val, (__u32 *)arg);
e589333f	269
ca414698 JW	270	return ret;
	271	}
	272
	273	static int ir_lirc_open(void *data)
	274	{
	275	return 0;
	276	}
	277
	278	static void ir_lirc_close(void *data)
	279	{
	280	return;
	281	}
	282
	283	static struct file_operations lirc_fops = {
	284	.owner = THIS_MODULE,
	285	.write = ir_lirc_transmit_ir,
044e5878	286	.unlocked_ioctl = ir_lirc_ioctl,
8be292cc JW	287	#ifdef CONFIG_COMPAT
	288	.compat_ioctl = ir_lirc_ioctl,
	289	#endif
ca414698 JW	290	.read = lirc_dev_fop_read,
	291	.poll = lirc_dev_fop_poll,
	292	.open = lirc_dev_fop_open,
	293	.release = lirc_dev_fop_close,
d9d2e9d5	294	.llseek = no_llseek,
ca414698 JW	295	};
ca414698 JW	296
d8b4b582	297	static int ir_lirc_register(struct rc_dev *dev)
ca414698	298	{
ca414698 JW	299	struct lirc_driver *drv;
	300	struct lirc_buffer *rbuf;
	301	int rc = -ENOMEM;
	302	unsigned long features;
	303
	304	drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
	305	if (!drv)
	306	return rc;
	307
	308	rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
49b7a12c	309	if (!rbuf)
ca414698 JW	310	goto rbuf_alloc_failed;
	311
	312	rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
	313	if (rc)
	314	goto rbuf_init_failed;
	315
	316	features = LIRC_CAN_REC_MODE2;
d8b4b582	317	if (dev->tx_ir) {
ca414698	318	features \|= LIRC_CAN_SEND_PULSE;
d8b4b582	319	if (dev->s_tx_mask)
ca414698	320	features \|= LIRC_CAN_SET_TRANSMITTER_MASK;
d8b4b582	321	if (dev->s_tx_carrier)
ca414698	322	features \|= LIRC_CAN_SET_SEND_CARRIER;
d8b4b582	323	if (dev->s_tx_duty_cycle)
67332ba8	324	features \|= LIRC_CAN_SET_SEND_DUTY_CYCLE;
ca414698 JW	325	}
ca414698 JW	326
d8b4b582	327	if (dev->s_rx_carrier_range)
e589333f ML	328	features \|= LIRC_CAN_SET_REC_CARRIER \|
	329	LIRC_CAN_SET_REC_CARRIER_RANGE;
	330
d8b4b582	331	if (dev->s_learning_mode)
e589333f ML	332	features \|= LIRC_CAN_USE_WIDEBAND_RECEIVER;
e589333f ML	333
d8b4b582	334	if (dev->s_carrier_report)
4651918a ML	335	features \|= LIRC_CAN_MEASURE_CARRIER;
4651918a ML	336
d8b4b582	337	if (dev->max_timeout)
e589333f ML	338	features \|= LIRC_CAN_SET_REC_TIMEOUT;
e589333f ML	339
ca414698	340	snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
d8b4b582	341	dev->driver_name);
ca414698 JW	342	drv->minor = -1;
ca414698 JW	343	drv->features = features;
d8b4b582	344	drv->data = &dev->raw->lirc;
ca414698 JW	345	drv->rbuf = rbuf;
	346	drv->set_use_inc = &ir_lirc_open;
	347	drv->set_use_dec = &ir_lirc_close;
	348	drv->code_length = sizeof(struct ir_raw_event) * 8;
	349	drv->fops = &lirc_fops;
d8b4b582	350	drv->dev = &dev->dev;
ca414698 JW	351	drv->owner = THIS_MODULE;
	352
	353	drv->minor = lirc_register_driver(drv);
	354	if (drv->minor < 0) {
	355	rc = -ENODEV;
	356	goto lirc_register_failed;
	357	}
	358
d8b4b582 DH	359	dev->raw->lirc.drv = drv;
d8b4b582 DH	360	dev->raw->lirc.dev = dev;
ca414698 JW	361	return 0;
	362
	363	lirc_register_failed:
	364	rbuf_init_failed:
	365	kfree(rbuf);
	366	rbuf_alloc_failed:
	367	kfree(drv);
	368
	369	return rc;
	370	}
	371
d8b4b582	372	static int ir_lirc_unregister(struct rc_dev *dev)
ca414698	373	{
d8b4b582	374	struct lirc_codec *lirc = &dev->raw->lirc;
ca414698 JW	375
	376	lirc_unregister_driver(lirc->drv->minor);
	377	lirc_buffer_free(lirc->drv->rbuf);
	378	kfree(lirc->drv);
	379
	380	return 0;
	381	}
	382
	383	static struct ir_raw_handler lirc_handler = {
52b66144	384	.protocols = RC_TYPE_LIRC,
ca414698 JW	385	.decode = ir_lirc_decode,
	386	.raw_register = ir_lirc_register,
	387	.raw_unregister = ir_lirc_unregister,
	388	};
	389
	390	static int __init ir_lirc_codec_init(void)
	391	{
	392	ir_raw_handler_register(&lirc_handler);
	393
	394	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	395	return 0;
	396	}
	397
	398	static void __exit ir_lirc_codec_exit(void)
	399	{
	400	ir_raw_handler_unregister(&lirc_handler);
	401	}
	402
	403	module_init(ir_lirc_codec_init);
	404	module_exit(ir_lirc_codec_exit);
	405
	406	MODULE_LICENSE("GPL");
	407	MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
	408	MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
	409	MODULE_DESCRIPTION("LIRC IR handler bridge");