[mirror_ubuntu-disco-kernel.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 <linux/module.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.
 * @dev:	the struct rc_dev descriptor of the device
 * @ev:		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->lirc.ldev || !dev->raw->lirc.ldev->buf)
		return -EINVAL;

	/* Packet start */
	if (ev.reset) {
		/* Userspace expects a long space event before the start of
		 * the signal to use as a sync.  This may be done with repeat
		 * packets and normal samples.  But if a reset has been sent
		 * then we assume that a long time has passed, so we send a
		 * space with the maximum time value. */
		sample = LIRC_SPACE(LIRC_VALUE_MASK);
		IR_dprintk(2, "delivering reset sync space to lirc_dev\n");

	/* Carrier reports */
	} else 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.ldev->buf,
					  (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.ldev->buf,
			  (unsigned char *) &sample);
	wake_up(&dev->raw->lirc.ldev->buf->wait_poll);

	return 0;
}

static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *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 = -EINVAL;
	size_t count;
	ktime_t start;
	s64 towait;
	unsigned int duration = 0; /* signal duration in us */
	int i;

	start = ktime_get();

	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 = -EINVAL;
		goto out;
	}

	for (i = 0; i < count; i++) {
		if (txbuf[i] > IR_MAX_DURATION / 1000 - duration || !txbuf[i]) {
			ret = -EINVAL;
			goto out;
		}

		duration += txbuf[i];
	}

	ret = dev->tx_ir(dev, txbuf, count);
	if (ret < 0)
		goto out;

	for (duration = i = 0; i < ret; i++)
		duration += txbuf[i];

	ret *= sizeof(unsigned int);

	/*
	 * The lircd gap calculation expects the write function to
	 * wait for the actual IR signal to be transmitted before
	 * returning.
	 */
	towait = ktime_us_delta(ktime_add_us(start, duration), ktime_get());
	if (towait > 0) {
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(usecs_to_jiffies(towait));
	}

out:
	kfree(txbuf);
	return ret;
}

static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
			unsigned long arg)
{
	struct lirc_codec *lirc;
	struct rc_dev *dev;
	u32 __user *argp = (u32 __user *)(arg);
	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, argp);
		if (ret)
			return ret;
	}

	switch (cmd) {

	/* legacy support */
	case LIRC_GET_SEND_MODE:
		if (!dev->tx_ir)
			return -ENOTTY;

		val = LIRC_MODE_PULSE;
		break;

	case LIRC_SET_SEND_MODE:
		if (!dev->tx_ir)
			return -ENOTTY;

		if (val != LIRC_MODE_PULSE)
			return -EINVAL;
		return 0;

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

		return dev->s_tx_mask(dev, val);

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

		return dev->s_tx_carrier(dev, val);

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

		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 -ENOTTY;

		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 (!dev->s_rx_carrier_range)
			return -ENOTTY;

		if (val <= 0)
			return -EINVAL;

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

	case LIRC_GET_REC_RESOLUTION:
		if (!dev->rx_resolution)
			return -ENOTTY;

		val = dev->rx_resolution / 1000;
		break;

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

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

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

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

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

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

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

		/* Check for multiply overflow */
		if (val > U32_MAX / 1000)
			return -EINVAL;

		tmp = val * 1000;

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

		if (dev->s_timeout)
			ret = dev->s_timeout(dev, tmp);
		if (!ret)
			dev->timeout = tmp;
		break;

	case LIRC_SET_REC_TIMEOUT_REPORTS:
		if (!dev->timeout)
			return -ENOTTY;

		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, argp);

	return ret;
}

static const 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_dev *ldev;
	int rc = -ENOMEM;
	unsigned long features = 0;

	ldev = lirc_allocate_device();
	if (!ldev)
		return rc;

	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
		features |= LIRC_CAN_REC_MODE2;
		if (dev->rx_resolution)
			features |= LIRC_CAN_GET_REC_RESOLUTION;
	}

	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(ldev->name, sizeof(ldev->name), "ir-lirc-codec (%s)",
		 dev->driver_name);
	ldev->features = features;
	ldev->data = &dev->raw->lirc;
	ldev->buf = NULL;
	ldev->code_length = sizeof(struct ir_raw_event) * 8;
	ldev->chunk_size = sizeof(int);
	ldev->buffer_size = LIRCBUF_SIZE;
	ldev->fops = &lirc_fops;
	ldev->dev.parent = &dev->dev;
	ldev->rdev = dev;
	ldev->owner = THIS_MODULE;

	rc = lirc_register_device(ldev);
	if (rc < 0)
		goto out;

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

out:
	lirc_free_device(ldev);
	return rc;
}

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

	lirc_unregister_device(lirc->ldev);
	lirc->ldev = NULL;

	return 0;
}

static struct ir_raw_handler lirc_handler = {
	.protocols	= 0,
	.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>
7a707b89	17	#include <linux/module.h>
ca414698	18	#include <media/lirc.h>
5690085e	19	#include <media/lirc_dev.h>
6bda9644	20	#include <media/rc-core.h>
f62de675	21	#include "rc-core-priv.h"
ca414698 JW	22
	23	#define LIRCBUF_SIZE 256
	24
	25	/**
	26	* ir_lirc_decode() - Send raw IR data to lirc_dev to be relayed to the
	27	* lircd userspace daemon for decoding.
1855e988 MCC	28	* @dev: the struct rc_dev descriptor of the device
1855e988 MCC	29	* @ev: the struct ir_raw_event descriptor of the pulse/space
ca414698 JW	30	*
	31	* This function returns -EINVAL if the lirc interfaces aren't wired up.
	32	*/
d8b4b582	33	static int ir_lirc_decode(struct rc_dev *dev, struct ir_raw_event ev)
ca414698	34	{
d8b4b582	35	struct lirc_codec *lirc = &dev->raw->lirc;
510fcb70	36	int sample;
ca414698	37
b15e3937	38	if (!dev->raw->lirc.ldev \|\| !dev->raw->lirc.ldev->buf)
ca414698 JW	39	return -EINVAL;
ca414698 JW	40
4651918a	41	/* Packet start */
a8f29e89 AL	42	if (ev.reset) {
	43	/* Userspace expects a long space event before the start of
	44	* the signal to use as a sync. This may be done with repeat
	45	* packets and normal samples. But if a reset has been sent
	46	* then we assume that a long time has passed, so we send a
	47	* space with the maximum time value. */
	48	sample = LIRC_SPACE(LIRC_VALUE_MASK);
	49	IR_dprintk(2, "delivering reset sync space to lirc_dev\n");
510fcb70	50
4651918a	51	/* Carrier reports */
a8f29e89	52	} else if (ev.carrier_report) {
4651918a	53	sample = LIRC_FREQUENCY(ev.carrier);
457e2ffc	54	IR_dprintk(2, "carrier report (freq: %d)\n", sample);
ca414698	55
4651918a ML	56	/* Packet end */
	57	} else if (ev.timeout) {
	58
	59	if (lirc->gap)
	60	return 0;
	61
	62	lirc->gap_start = ktime_get();
	63	lirc->gap = true;
	64	lirc->gap_duration = ev.duration;
	65
	66	if (!lirc->send_timeout_reports)
	67	return 0;
	68
	69	sample = LIRC_TIMEOUT(ev.duration / 1000);
457e2ffc	70	IR_dprintk(2, "timeout report (duration: %d)\n", sample);
4651918a ML	71
	72	/* Normal sample */
	73	} else {
	74
	75	if (lirc->gap) {
	76	int gap_sample;
	77
	78	lirc->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
	79	lirc->gap_start));
	80
	81	/* Convert to ms and cap by LIRC_VALUE_MASK */
	82	do_div(lirc->gap_duration, 1000);
	83	lirc->gap_duration = min(lirc->gap_duration,
	84	(u64)LIRC_VALUE_MASK);
	85
	86	gap_sample = LIRC_SPACE(lirc->gap_duration);
b15e3937	87	lirc_buffer_write(dev->raw->lirc.ldev->buf,
5ddc9c09	88	(unsigned char *)&gap_sample);
4651918a ML	89	lirc->gap = false;
	90	}
	91
	92	sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) :
	93	LIRC_SPACE(ev.duration / 1000);
457e2ffc JW	94	IR_dprintk(2, "delivering %uus %s to lirc_dev\n",
457e2ffc JW	95	TO_US(ev.duration), TO_STR(ev.pulse));
4651918a	96	}
ca414698	97
b15e3937	98	lirc_buffer_write(dev->raw->lirc.ldev->buf,
510fcb70	99	(unsigned char *) &sample);
b15e3937	100	wake_up(&dev->raw->lirc.ldev->buf->wait_poll);
ca414698	101
ca414698 JW	102	return 0;
	103	}
	104
06bd801c	105	static ssize_t ir_lirc_transmit_ir(struct file file, const char __user buf,
ca414698 JW	106	size_t n, loff_t *ppos)
	107	{
	108	struct lirc_codec *lirc;
d8b4b582	109	struct rc_dev *dev;
5588dc2b	110	unsigned int txbuf; / buffer with values to transmit */
d07df223	111	ssize_t ret = -EINVAL;
4c8b8698	112	size_t count;
f8e00d5f DH	113	ktime_t start;
	114	s64 towait;
	115	unsigned int duration = 0; /* signal duration in us */
	116	int i;
	117
	118	start = ktime_get();
ca414698 JW	119
	120	lirc = lirc_get_pdata(file);
	121	if (!lirc)
	122	return -EFAULT;
	123
5588dc2b	124	if (n < sizeof(unsigned) \|\| n % sizeof(unsigned))
ca414698 JW	125	return -EINVAL;
ca414698 JW	126
5588dc2b DH	127	count = n / sizeof(unsigned);
5588dc2b DH	128	if (count > LIRCBUF_SIZE \|\| count % 2 == 0)
ca414698 JW	129	return -EINVAL;
ca414698 JW	130
6efb870a JW	131	txbuf = memdup_user(buf, n);
	132	if (IS_ERR(txbuf))
	133	return PTR_ERR(txbuf);
ca414698	134
d8b4b582 DH	135	dev = lirc->dev;
d8b4b582 DH	136	if (!dev) {
ca414698 JW	137	ret = -EFAULT;
	138	goto out;
	139	}
	140
f8e00d5f	141	if (!dev->tx_ir) {
5c862758	142	ret = -EINVAL;
f8e00d5f DH	143	goto out;
	144	}
	145
25379bf8 SY	146	for (i = 0; i < count; i++) {
	147	if (txbuf[i] > IR_MAX_DURATION / 1000 - duration \|\| !txbuf[i]) {
	148	ret = -EINVAL;
	149	goto out;
	150	}
	151
	152	duration += txbuf[i];
	153	}
	154
586c61fd	155	ret = dev->tx_ir(dev, txbuf, count);
f8e00d5f DH	156	if (ret < 0)
	157	goto out;
	158
25379bf8	159	for (duration = i = 0; i < ret; i++)
f8e00d5f	160	duration += txbuf[i];
5588dc2b	161
f8e00d5f DH	162	ret *= sizeof(unsigned int);
	163
	164	/*
	165	* The lircd gap calculation expects the write function to
	166	* wait for the actual IR signal to be transmitted before
	167	* returning.
	168	*/
	169	towait = ktime_us_delta(ktime_add_us(start, duration), ktime_get());
	170	if (towait > 0) {
	171	set_current_state(TASK_INTERRUPTIBLE);
	172	schedule_timeout(usecs_to_jiffies(towait));
	173	}
ca414698 JW	174
	175	out:
	176	kfree(txbuf);
	177	return ret;
	178	}
	179
e589333f	180	static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
06bd801c	181	unsigned long arg)
ca414698 JW	182	{
ca414698 JW	183	struct lirc_codec *lirc;
d8b4b582	184	struct rc_dev *dev;
06bd801c	185	u32 __user argp = (u32 __user )(arg);
ca414698	186	int ret = 0;
4651918a	187	__u32 val = 0, tmp;
ca414698 JW	188
	189	lirc = lirc_get_pdata(filep);
	190	if (!lirc)
	191	return -EFAULT;
	192
d8b4b582 DH	193	dev = lirc->dev;
d8b4b582 DH	194	if (!dev)
ca414698 JW	195	return -EFAULT;
ca414698 JW	196
e589333f	197	if (_IOC_DIR(cmd) & _IOC_WRITE) {
06bd801c	198	ret = get_user(val, argp);
ca414698 JW	199	if (ret)
ca414698 JW	200	return ret;
e589333f ML	201	}
	202
	203	switch (cmd) {
	204
	205	/* legacy support */
	206	case LIRC_GET_SEND_MODE:
07e9293c SY	207	if (!dev->tx_ir)
	208	return -ENOTTY;
	209
	210	val = LIRC_MODE_PULSE;
e589333f ML	211	break;
	212
	213	case LIRC_SET_SEND_MODE:
07e9293c SY	214	if (!dev->tx_ir)
	215	return -ENOTTY;
	216
	217	if (val != LIRC_MODE_PULSE)
e589333f	218	return -EINVAL;
4651918a	219	return 0;
ca414698	220
e589333f ML	221	/* TX settings */
e589333f ML	222	case LIRC_SET_TRANSMITTER_MASK:
d8b4b582	223	if (!dev->s_tx_mask)
5c862758	224	return -ENOTTY;
4651918a	225
d8b4b582	226	return dev->s_tx_mask(dev, val);
ca414698 JW	227
ca414698 JW	228	case LIRC_SET_SEND_CARRIER:
d8b4b582	229	if (!dev->s_tx_carrier)
5c862758	230	return -ENOTTY;
4651918a	231
d8b4b582	232	return dev->s_tx_carrier(dev, val);
ca414698	233
e589333f	234	case LIRC_SET_SEND_DUTY_CYCLE:
d8b4b582	235	if (!dev->s_tx_duty_cycle)
5c862758	236	return -ENOTTY;
e589333f ML	237
	238	if (val <= 0 \|\| val >= 100)
	239	return -EINVAL;
	240
d8b4b582	241	return dev->s_tx_duty_cycle(dev, val);
ca414698	242
e589333f ML	243	/* RX settings */
e589333f ML	244	case LIRC_SET_REC_CARRIER:
d8b4b582	245	if (!dev->s_rx_carrier_range)
5c862758	246	return -ENOTTY;
ca414698	247
4651918a ML	248	if (val <= 0)
	249	return -EINVAL;
	250
d8b4b582 DH	251	return dev->s_rx_carrier_range(dev,
	252	dev->raw->lirc.carrier_low,
	253	val);
e589333f ML	254
e589333f ML	255	case LIRC_SET_REC_CARRIER_RANGE:
bc989391 SY	256	if (!dev->s_rx_carrier_range)
	257	return -ENOTTY;
	258
4651918a ML	259	if (val <= 0)
4651918a ML	260	return -EINVAL;
e589333f	261
d8b4b582	262	dev->raw->lirc.carrier_low = val;
4651918a	263	return 0;
e589333f ML	264
e589333f ML	265	case LIRC_GET_REC_RESOLUTION:
e8f48188 SY	266	if (!dev->rx_resolution)
	267	return -ENOTTY;
	268
9f5039ba	269	val = dev->rx_resolution / 1000;
e589333f ML	270	break;
	271
	272	case LIRC_SET_WIDEBAND_RECEIVER:
d8b4b582	273	if (!dev->s_learning_mode)
5c862758	274	return -ENOTTY;
e589333f	275
d8b4b582	276	return dev->s_learning_mode(dev, !!val);
4651918a ML	277
4651918a ML	278	case LIRC_SET_MEASURE_CARRIER_MODE:
d8b4b582	279	if (!dev->s_carrier_report)
5c862758	280	return -ENOTTY;
4651918a	281
d8b4b582	282	return dev->s_carrier_report(dev, !!val);
4651918a	283
e589333f ML	284	/* Generic timeout support */
e589333f ML	285	case LIRC_GET_MIN_TIMEOUT:
d8b4b582	286	if (!dev->max_timeout)
5c862758	287	return -ENOTTY;
f348b4d3	288	val = DIV_ROUND_UP(dev->min_timeout, 1000);
e589333f ML	289	break;
	290
	291	case LIRC_GET_MAX_TIMEOUT:
d8b4b582	292	if (!dev->max_timeout)
5c862758	293	return -ENOTTY;
d8b4b582	294	val = dev->max_timeout / 1000;
e589333f ML	295	break;
	296
	297	case LIRC_SET_REC_TIMEOUT:
d8b4b582	298	if (!dev->max_timeout)
5c862758	299	return -ENOTTY;
4651918a	300
3e45067f SY	301	/* Check for multiply overflow */
	302	if (val > U32_MAX / 1000)
	303	return -EINVAL;
	304
4651918a ML	305	tmp = val * 1000;
4651918a ML	306
3e45067f SY	307	if (tmp < dev->min_timeout \|\| tmp > dev->max_timeout)
3e45067f SY	308	return -EINVAL;
4651918a	309
4f253cec SY	310	if (dev->s_timeout)
	311	ret = dev->s_timeout(dev, tmp);
	312	if (!ret)
	313	dev->timeout = tmp;
4651918a ML	314	break;
	315
	316	case LIRC_SET_REC_TIMEOUT_REPORTS:
bc989391 SY	317	if (!dev->timeout)
	318	return -ENOTTY;
	319
4651918a	320	lirc->send_timeout_reports = !!val;
ca414698 JW	321	break;
	322
	323	default:
044e5878	324	return lirc_dev_fop_ioctl(filep, cmd, arg);
ca414698 JW	325	}
ca414698 JW	326
e589333f	327	if (_IOC_DIR(cmd) & _IOC_READ)
06bd801c	328	ret = put_user(val, argp);
e589333f	329
ca414698 JW	330	return ret;
	331	}
	332
75ef9de1	333	static const struct file_operations lirc_fops = {
ca414698 JW	334	.owner = THIS_MODULE,
ca414698 JW	335	.write = ir_lirc_transmit_ir,
044e5878	336	.unlocked_ioctl = ir_lirc_ioctl,
8be292cc JW	337	#ifdef CONFIG_COMPAT
	338	.compat_ioctl = ir_lirc_ioctl,
	339	#endif
ca414698 JW	340	.read = lirc_dev_fop_read,
	341	.poll = lirc_dev_fop_poll,
	342	.open = lirc_dev_fop_open,
	343	.release = lirc_dev_fop_close,
d9d2e9d5	344	.llseek = no_llseek,
ca414698 JW	345	};
ca414698 JW	346
d8b4b582	347	static int ir_lirc_register(struct rc_dev *dev)
ca414698	348	{
5ddc9c09	349	struct lirc_dev *ldev;
ca414698	350	int rc = -ENOMEM;
c9bbd566	351	unsigned long features = 0;
ca414698	352
6ecccc37	353	ldev = lirc_allocate_device();
5ddc9c09	354	if (!ldev)
ca414698 JW	355	return rc;
ca414698 JW	356
e8f48188	357	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
c9bbd566	358	features \|= LIRC_CAN_REC_MODE2;
e8f48188 SY	359	if (dev->rx_resolution)
	360	features \|= LIRC_CAN_GET_REC_RESOLUTION;
	361	}
0f7c4063	362
d8b4b582	363	if (dev->tx_ir) {
ca414698	364	features \|= LIRC_CAN_SEND_PULSE;
d8b4b582	365	if (dev->s_tx_mask)
ca414698	366	features \|= LIRC_CAN_SET_TRANSMITTER_MASK;
d8b4b582	367	if (dev->s_tx_carrier)
ca414698	368	features \|= LIRC_CAN_SET_SEND_CARRIER;
d8b4b582	369	if (dev->s_tx_duty_cycle)
67332ba8	370	features \|= LIRC_CAN_SET_SEND_DUTY_CYCLE;
ca414698 JW	371	}
ca414698 JW	372
d8b4b582	373	if (dev->s_rx_carrier_range)
e589333f ML	374	features \|= LIRC_CAN_SET_REC_CARRIER \|
	375	LIRC_CAN_SET_REC_CARRIER_RANGE;
	376
d8b4b582	377	if (dev->s_learning_mode)
e589333f ML	378	features \|= LIRC_CAN_USE_WIDEBAND_RECEIVER;
e589333f ML	379
d8b4b582	380	if (dev->s_carrier_report)
4651918a ML	381	features \|= LIRC_CAN_MEASURE_CARRIER;
4651918a ML	382
d8b4b582	383	if (dev->max_timeout)
e589333f ML	384	features \|= LIRC_CAN_SET_REC_TIMEOUT;
e589333f ML	385
5ddc9c09	386	snprintf(ldev->name, sizeof(ldev->name), "ir-lirc-codec (%s)",
d8b4b582	387	dev->driver_name);
5ddc9c09 DH	388	ldev->features = features;
5ddc9c09 DH	389	ldev->data = &dev->raw->lirc;
b15e3937	390	ldev->buf = NULL;
5ddc9c09 DH	391	ldev->code_length = sizeof(struct ir_raw_event) * 8;
	392	ldev->chunk_size = sizeof(int);
	393	ldev->buffer_size = LIRCBUF_SIZE;
	394	ldev->fops = &lirc_fops;
b15e3937	395	ldev->dev.parent = &dev->dev;
5ddc9c09 DH	396	ldev->rdev = dev;
	397	ldev->owner = THIS_MODULE;
	398
	399	rc = lirc_register_device(ldev);
c3c6dd75	400	if (rc < 0)
0f7c4063	401	goto out;
ca414698	402
5ddc9c09	403	dev->raw->lirc.ldev = ldev;
d8b4b582	404	dev->raw->lirc.dev = dev;
ca414698 JW	405	return 0;
ca414698 JW	406
0f7c4063	407	out:
b15e3937	408	lirc_free_device(ldev);
ca414698 JW	409	return rc;
	410	}
	411
d8b4b582	412	static int ir_lirc_unregister(struct rc_dev *dev)
ca414698	413	{
d8b4b582	414	struct lirc_codec *lirc = &dev->raw->lirc;
ca414698	415
5ddc9c09	416	lirc_unregister_device(lirc->ldev);
5ddc9c09	417	lirc->ldev = NULL;
ca414698 JW	418
	419	return 0;
	420	}
	421
	422	static struct ir_raw_handler lirc_handler = {
275ddb40	423	.protocols = 0,
ca414698 JW	424	.decode = ir_lirc_decode,
	425	.raw_register = ir_lirc_register,
	426	.raw_unregister = ir_lirc_unregister,
	427	};
	428
	429	static int __init ir_lirc_codec_init(void)
	430	{
	431	ir_raw_handler_register(&lirc_handler);
	432
	433	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	434	return 0;
	435	}
	436
	437	static void __exit ir_lirc_codec_exit(void)
	438	{
	439	ir_raw_handler_unregister(&lirc_handler);
	440	}
	441
	442	module_init(ir_lirc_codec_init);
	443	module_exit(ir_lirc_codec_exit);
	444
	445	MODULE_LICENSE("GPL");
	446	MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
	447	MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
	448	MODULE_DESCRIPTION("LIRC IR handler bridge");