[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 <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.
 * @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->lirc.drv || !dev->raw->lirc.drv->rbuf)
		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.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 __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 = -ENOSYS;
		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:
		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 -ENOSYS;

		return dev->s_tx_mask(dev, val);

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

		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;

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

	return ret;
}

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

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

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_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->rdev = 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->rbuf);
	kfree(lirc->drv);

	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.
d8b4b582	28	* @input_dev: the struct rc_dev descriptor of the device
ca414698 JW	29	* @duration: the struct ir_raw_event descriptor of the pulse/space
	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
d8b4b582	38	if (!dev->raw->lirc.drv \|\| !dev->raw->lirc.drv->rbuf)
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);
d8b4b582	87	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
4651918a ML	88	(unsigned char *) &gap_sample);
	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
d8b4b582	98	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
510fcb70	99	(unsigned char *) &sample);
d8b4b582	100	wake_up(&dev->raw->lirc.drv->rbuf->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 DH	141	if (!dev->tx_ir) {
	142	ret = -ENOSYS;
	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:
	207	val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
	208	break;
	209
	210	case LIRC_SET_SEND_MODE:
	211	if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
	212	return -EINVAL;
4651918a	213	return 0;
ca414698	214
e589333f ML	215	/* TX settings */
e589333f ML	216	case LIRC_SET_TRANSMITTER_MASK:
d8b4b582	217	if (!dev->s_tx_mask)
5f49908a	218	return -ENOSYS;
4651918a	219
d8b4b582	220	return dev->s_tx_mask(dev, val);
ca414698 JW	221
ca414698 JW	222	case LIRC_SET_SEND_CARRIER:
d8b4b582	223	if (!dev->s_tx_carrier)
5f49908a	224	return -ENOSYS;
4651918a	225
d8b4b582	226	return dev->s_tx_carrier(dev, val);
ca414698	227
e589333f	228	case LIRC_SET_SEND_DUTY_CYCLE:
d8b4b582	229	if (!dev->s_tx_duty_cycle)
e589333f ML	230	return -ENOSYS;
	231
	232	if (val <= 0 \|\| val >= 100)
	233	return -EINVAL;
	234
d8b4b582	235	return dev->s_tx_duty_cycle(dev, val);
ca414698	236
e589333f ML	237	/* RX settings */
e589333f ML	238	case LIRC_SET_REC_CARRIER:
d8b4b582	239	if (!dev->s_rx_carrier_range)
e589333f	240	return -ENOSYS;
ca414698	241
4651918a ML	242	if (val <= 0)
	243	return -EINVAL;
	244
d8b4b582 DH	245	return dev->s_rx_carrier_range(dev,
	246	dev->raw->lirc.carrier_low,
	247	val);
e589333f ML	248
e589333f ML	249	case LIRC_SET_REC_CARRIER_RANGE:
4651918a ML	250	if (val <= 0)
4651918a ML	251	return -EINVAL;
e589333f	252
d8b4b582	253	dev->raw->lirc.carrier_low = val;
4651918a	254	return 0;
e589333f ML	255
e589333f ML	256	case LIRC_GET_REC_RESOLUTION:
d8b4b582	257	val = dev->rx_resolution;
e589333f ML	258	break;
	259
	260	case LIRC_SET_WIDEBAND_RECEIVER:
d8b4b582	261	if (!dev->s_learning_mode)
e589333f ML	262	return -ENOSYS;
e589333f ML	263
d8b4b582	264	return dev->s_learning_mode(dev, !!val);
4651918a ML	265
4651918a ML	266	case LIRC_SET_MEASURE_CARRIER_MODE:
d8b4b582	267	if (!dev->s_carrier_report)
4651918a ML	268	return -ENOSYS;
4651918a ML	269
d8b4b582	270	return dev->s_carrier_report(dev, !!val);
4651918a	271
e589333f ML	272	/* Generic timeout support */
e589333f ML	273	case LIRC_GET_MIN_TIMEOUT:
d8b4b582	274	if (!dev->max_timeout)
e589333f	275	return -ENOSYS;
d8b4b582	276	val = dev->min_timeout / 1000;
e589333f ML	277	break;
	278
	279	case LIRC_GET_MAX_TIMEOUT:
d8b4b582	280	if (!dev->max_timeout)
e589333f	281	return -ENOSYS;
d8b4b582	282	val = dev->max_timeout / 1000;
e589333f ML	283	break;
	284
	285	case LIRC_SET_REC_TIMEOUT:
d8b4b582	286	if (!dev->max_timeout)
4651918a ML	287	return -ENOSYS;
	288
	289	tmp = val * 1000;
	290
d8b4b582 DH	291	if (tmp < dev->min_timeout \|\|
d8b4b582 DH	292	tmp > dev->max_timeout)
4651918a ML	293	return -EINVAL;
4651918a ML	294
4f253cec SY	295	if (dev->s_timeout)
	296	ret = dev->s_timeout(dev, tmp);
	297	if (!ret)
	298	dev->timeout = tmp;
4651918a ML	299	break;
	300
	301	case LIRC_SET_REC_TIMEOUT_REPORTS:
	302	lirc->send_timeout_reports = !!val;
ca414698 JW	303	break;
	304
	305	default:
044e5878	306	return lirc_dev_fop_ioctl(filep, cmd, arg);
ca414698 JW	307	}
ca414698 JW	308
e589333f	309	if (_IOC_DIR(cmd) & _IOC_READ)
06bd801c	310	ret = put_user(val, argp);
e589333f	311
ca414698 JW	312	return ret;
	313	}
	314
	315	static int ir_lirc_open(void *data)
	316	{
	317	return 0;
	318	}
	319
	320	static void ir_lirc_close(void *data)
	321	{
	322	return;
	323	}
	324
75ef9de1	325	static const struct file_operations lirc_fops = {
ca414698 JW	326	.owner = THIS_MODULE,
ca414698 JW	327	.write = ir_lirc_transmit_ir,
044e5878	328	.unlocked_ioctl = ir_lirc_ioctl,
8be292cc JW	329	#ifdef CONFIG_COMPAT
	330	.compat_ioctl = ir_lirc_ioctl,
	331	#endif
ca414698 JW	332	.read = lirc_dev_fop_read,
	333	.poll = lirc_dev_fop_poll,
	334	.open = lirc_dev_fop_open,
	335	.release = lirc_dev_fop_close,
d9d2e9d5	336	.llseek = no_llseek,
ca414698 JW	337	};
ca414698 JW	338
d8b4b582	339	static int ir_lirc_register(struct rc_dev *dev)
ca414698	340	{
ca414698 JW	341	struct lirc_driver *drv;
	342	struct lirc_buffer *rbuf;
	343	int rc = -ENOMEM;
	344	unsigned long features;
	345
	346	drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
	347	if (!drv)
	348	return rc;
	349
	350	rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
49b7a12c	351	if (!rbuf)
ca414698 JW	352	goto rbuf_alloc_failed;
	353
	354	rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
	355	if (rc)
	356	goto rbuf_init_failed;
	357
	358	features = LIRC_CAN_REC_MODE2;
d8b4b582	359	if (dev->tx_ir) {
ca414698	360	features \|= LIRC_CAN_SEND_PULSE;
d8b4b582	361	if (dev->s_tx_mask)
ca414698	362	features \|= LIRC_CAN_SET_TRANSMITTER_MASK;
d8b4b582	363	if (dev->s_tx_carrier)
ca414698	364	features \|= LIRC_CAN_SET_SEND_CARRIER;
d8b4b582	365	if (dev->s_tx_duty_cycle)
67332ba8	366	features \|= LIRC_CAN_SET_SEND_DUTY_CYCLE;
ca414698 JW	367	}
ca414698 JW	368
d8b4b582	369	if (dev->s_rx_carrier_range)
e589333f ML	370	features \|= LIRC_CAN_SET_REC_CARRIER \|
	371	LIRC_CAN_SET_REC_CARRIER_RANGE;
	372
d8b4b582	373	if (dev->s_learning_mode)
e589333f ML	374	features \|= LIRC_CAN_USE_WIDEBAND_RECEIVER;
e589333f ML	375
d8b4b582	376	if (dev->s_carrier_report)
4651918a ML	377	features \|= LIRC_CAN_MEASURE_CARRIER;
4651918a ML	378
d8b4b582	379	if (dev->max_timeout)
e589333f ML	380	features \|= LIRC_CAN_SET_REC_TIMEOUT;
e589333f ML	381
ca414698	382	snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
d8b4b582	383	dev->driver_name);
ca414698 JW	384	drv->minor = -1;
ca414698 JW	385	drv->features = features;
d8b4b582	386	drv->data = &dev->raw->lirc;
ca414698 JW	387	drv->rbuf = rbuf;
	388	drv->set_use_inc = &ir_lirc_open;
	389	drv->set_use_dec = &ir_lirc_close;
	390	drv->code_length = sizeof(struct ir_raw_event) * 8;
	391	drv->fops = &lirc_fops;
d8b4b582	392	drv->dev = &dev->dev;
ca7a722d	393	drv->rdev = dev;
ca414698 JW	394	drv->owner = THIS_MODULE;
	395
	396	drv->minor = lirc_register_driver(drv);
	397	if (drv->minor < 0) {
	398	rc = -ENODEV;
	399	goto lirc_register_failed;
	400	}
	401
d8b4b582 DH	402	dev->raw->lirc.drv = drv;
d8b4b582 DH	403	dev->raw->lirc.dev = dev;
ca414698 JW	404	return 0;
	405
	406	lirc_register_failed:
	407	rbuf_init_failed:
	408	kfree(rbuf);
	409	rbuf_alloc_failed:
	410	kfree(drv);
	411
	412	return rc;
	413	}
	414
d8b4b582	415	static int ir_lirc_unregister(struct rc_dev *dev)
ca414698	416	{
d8b4b582	417	struct lirc_codec *lirc = &dev->raw->lirc;
ca414698 JW	418
	419	lirc_unregister_driver(lirc->drv->minor);
	420	lirc_buffer_free(lirc->drv->rbuf);
c77adf21	421	kfree(lirc->drv->rbuf);
ca414698 JW	422	kfree(lirc->drv);
	423
	424	return 0;
	425	}
	426
	427	static struct ir_raw_handler lirc_handler = {
275ddb40	428	.protocols = 0,
ca414698 JW	429	.decode = ir_lirc_decode,
	430	.raw_register = ir_lirc_register,
	431	.raw_unregister = ir_lirc_unregister,
	432	};
	433
	434	static int __init ir_lirc_codec_init(void)
	435	{
	436	ir_raw_handler_register(&lirc_handler);
	437
	438	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	439	return 0;
	440	}
	441
	442	static void __exit ir_lirc_codec_exit(void)
	443	{
	444	ir_raw_handler_unregister(&lirc_handler);
	445	}
	446
	447	module_init(ir_lirc_codec_init);
	448	module_exit(ir_lirc_codec_exit);
	449
	450	MODULE_LICENSE("GPL");
	451	MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
	452	MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
	453	MODULE_DESCRIPTION("LIRC IR handler bridge");