[linux-2.6-block.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->enabled_protocols & RC_BIT_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 __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;
	}

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

	for (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;

		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 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_BIT_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>
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
9719afae	38	if (!(dev->enabled_protocols & RC_BIT_LIRC))
ca414698 JW	39	return 0;
ca414698 JW	40
d8b4b582	41	if (!dev->raw->lirc.drv \|\| !dev->raw->lirc.drv->rbuf)
ca414698 JW	42	return -EINVAL;
ca414698 JW	43
4651918a ML	44	/* Packet start */
4651918a ML	45	if (ev.reset)
510fcb70 ML	46	return 0;
510fcb70 ML	47
4651918a ML	48	/* Carrier reports */
	49	if (ev.carrier_report) {
	50	sample = LIRC_FREQUENCY(ev.carrier);
457e2ffc	51	IR_dprintk(2, "carrier report (freq: %d)\n", sample);
ca414698	52
4651918a ML	53	/* Packet end */
	54	} else if (ev.timeout) {
	55
	56	if (lirc->gap)
	57	return 0;
	58
	59	lirc->gap_start = ktime_get();
	60	lirc->gap = true;
	61	lirc->gap_duration = ev.duration;
	62
	63	if (!lirc->send_timeout_reports)
	64	return 0;
	65
	66	sample = LIRC_TIMEOUT(ev.duration / 1000);
457e2ffc	67	IR_dprintk(2, "timeout report (duration: %d)\n", sample);
4651918a ML	68
	69	/* Normal sample */
	70	} else {
	71
	72	if (lirc->gap) {
	73	int gap_sample;
	74
	75	lirc->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
	76	lirc->gap_start));
	77
	78	/* Convert to ms and cap by LIRC_VALUE_MASK */
	79	do_div(lirc->gap_duration, 1000);
	80	lirc->gap_duration = min(lirc->gap_duration,
	81	(u64)LIRC_VALUE_MASK);
	82
	83	gap_sample = LIRC_SPACE(lirc->gap_duration);
d8b4b582	84	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
4651918a ML	85	(unsigned char *) &gap_sample);
	86	lirc->gap = false;
	87	}
	88
	89	sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) :
	90	LIRC_SPACE(ev.duration / 1000);
457e2ffc JW	91	IR_dprintk(2, "delivering %uus %s to lirc_dev\n",
457e2ffc JW	92	TO_US(ev.duration), TO_STR(ev.pulse));
4651918a	93	}
ca414698	94
d8b4b582	95	lirc_buffer_write(dev->raw->lirc.drv->rbuf,
510fcb70	96	(unsigned char *) &sample);
d8b4b582	97	wake_up(&dev->raw->lirc.drv->rbuf->wait_poll);
ca414698	98
ca414698 JW	99	return 0;
	100	}
	101
06bd801c	102	static ssize_t ir_lirc_transmit_ir(struct file file, const char __user buf,
ca414698 JW	103	size_t n, loff_t *ppos)
	104	{
	105	struct lirc_codec *lirc;
d8b4b582	106	struct rc_dev *dev;
5588dc2b	107	unsigned int txbuf; / buffer with values to transmit */
d07df223	108	ssize_t ret = -EINVAL;
4c8b8698	109	size_t count;
f8e00d5f DH	110	ktime_t start;
	111	s64 towait;
	112	unsigned int duration = 0; /* signal duration in us */
	113	int i;
	114
	115	start = ktime_get();
ca414698 JW	116
	117	lirc = lirc_get_pdata(file);
	118	if (!lirc)
	119	return -EFAULT;
	120
5588dc2b	121	if (n < sizeof(unsigned) \|\| n % sizeof(unsigned))
ca414698 JW	122	return -EINVAL;
ca414698 JW	123
5588dc2b DH	124	count = n / sizeof(unsigned);
5588dc2b DH	125	if (count > LIRCBUF_SIZE \|\| count % 2 == 0)
ca414698 JW	126	return -EINVAL;
ca414698 JW	127
6efb870a JW	128	txbuf = memdup_user(buf, n);
	129	if (IS_ERR(txbuf))
	130	return PTR_ERR(txbuf);
ca414698	131
d8b4b582 DH	132	dev = lirc->dev;
d8b4b582 DH	133	if (!dev) {
ca414698 JW	134	ret = -EFAULT;
	135	goto out;
	136	}
	137
f8e00d5f DH	138	if (!dev->tx_ir) {
	139	ret = -ENOSYS;
	140	goto out;
	141	}
	142
586c61fd	143	ret = dev->tx_ir(dev, txbuf, count);
f8e00d5f DH	144	if (ret < 0)
	145	goto out;
	146
	147	for (i = 0; i < ret; i++)
	148	duration += txbuf[i];
5588dc2b	149
f8e00d5f DH	150	ret *= sizeof(unsigned int);
	151
	152	/*
	153	* The lircd gap calculation expects the write function to
	154	* wait for the actual IR signal to be transmitted before
	155	* returning.
	156	*/
	157	towait = ktime_us_delta(ktime_add_us(start, duration), ktime_get());
	158	if (towait > 0) {
	159	set_current_state(TASK_INTERRUPTIBLE);
	160	schedule_timeout(usecs_to_jiffies(towait));
	161	}
ca414698 JW	162
	163	out:
	164	kfree(txbuf);
	165	return ret;
	166	}
	167
e589333f	168	static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
06bd801c	169	unsigned long arg)
ca414698 JW	170	{
ca414698 JW	171	struct lirc_codec *lirc;
d8b4b582	172	struct rc_dev *dev;
06bd801c	173	u32 __user argp = (u32 __user )(arg);
ca414698	174	int ret = 0;
4651918a	175	__u32 val = 0, tmp;
ca414698 JW	176
	177	lirc = lirc_get_pdata(filep);
	178	if (!lirc)
	179	return -EFAULT;
	180
d8b4b582 DH	181	dev = lirc->dev;
d8b4b582 DH	182	if (!dev)
ca414698 JW	183	return -EFAULT;
ca414698 JW	184
e589333f	185	if (_IOC_DIR(cmd) & _IOC_WRITE) {
06bd801c	186	ret = get_user(val, argp);
ca414698 JW	187	if (ret)
ca414698 JW	188	return ret;
e589333f ML	189	}
	190
	191	switch (cmd) {
	192
	193	/* legacy support */
	194	case LIRC_GET_SEND_MODE:
	195	val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
	196	break;
	197
	198	case LIRC_SET_SEND_MODE:
	199	if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
	200	return -EINVAL;
4651918a	201	return 0;
ca414698	202
e589333f ML	203	/* TX settings */
e589333f ML	204	case LIRC_SET_TRANSMITTER_MASK:
d8b4b582	205	if (!dev->s_tx_mask)
5f49908a	206	return -ENOSYS;
4651918a	207
d8b4b582	208	return dev->s_tx_mask(dev, val);
ca414698 JW	209
ca414698 JW	210	case LIRC_SET_SEND_CARRIER:
d8b4b582	211	if (!dev->s_tx_carrier)
5f49908a	212	return -ENOSYS;
4651918a	213
d8b4b582	214	return dev->s_tx_carrier(dev, val);
ca414698	215
e589333f	216	case LIRC_SET_SEND_DUTY_CYCLE:
d8b4b582	217	if (!dev->s_tx_duty_cycle)
e589333f ML	218	return -ENOSYS;
	219
	220	if (val <= 0 \|\| val >= 100)
	221	return -EINVAL;
	222
d8b4b582	223	return dev->s_tx_duty_cycle(dev, val);
ca414698	224
e589333f ML	225	/* RX settings */
e589333f ML	226	case LIRC_SET_REC_CARRIER:
d8b4b582	227	if (!dev->s_rx_carrier_range)
e589333f	228	return -ENOSYS;
ca414698	229
4651918a ML	230	if (val <= 0)
	231	return -EINVAL;
	232
d8b4b582 DH	233	return dev->s_rx_carrier_range(dev,
	234	dev->raw->lirc.carrier_low,
	235	val);
e589333f ML	236
e589333f ML	237	case LIRC_SET_REC_CARRIER_RANGE:
4651918a ML	238	if (val <= 0)
4651918a ML	239	return -EINVAL;
e589333f	240
d8b4b582	241	dev->raw->lirc.carrier_low = val;
4651918a	242	return 0;
e589333f ML	243
e589333f ML	244	case LIRC_GET_REC_RESOLUTION:
d8b4b582	245	val = dev->rx_resolution;
e589333f ML	246	break;
	247
	248	case LIRC_SET_WIDEBAND_RECEIVER:
d8b4b582	249	if (!dev->s_learning_mode)
e589333f ML	250	return -ENOSYS;
e589333f ML	251
d8b4b582	252	return dev->s_learning_mode(dev, !!val);
4651918a ML	253
4651918a ML	254	case LIRC_SET_MEASURE_CARRIER_MODE:
d8b4b582	255	if (!dev->s_carrier_report)
4651918a ML	256	return -ENOSYS;
4651918a ML	257
d8b4b582	258	return dev->s_carrier_report(dev, !!val);
4651918a	259
e589333f ML	260	/* Generic timeout support */
e589333f ML	261	case LIRC_GET_MIN_TIMEOUT:
d8b4b582	262	if (!dev->max_timeout)
e589333f	263	return -ENOSYS;
d8b4b582	264	val = dev->min_timeout / 1000;
e589333f ML	265	break;
	266
	267	case LIRC_GET_MAX_TIMEOUT:
d8b4b582	268	if (!dev->max_timeout)
e589333f	269	return -ENOSYS;
d8b4b582	270	val = dev->max_timeout / 1000;
e589333f ML	271	break;
	272
	273	case LIRC_SET_REC_TIMEOUT:
d8b4b582	274	if (!dev->max_timeout)
4651918a ML	275	return -ENOSYS;
	276
	277	tmp = val * 1000;
	278
d8b4b582 DH	279	if (tmp < dev->min_timeout \|\|
d8b4b582 DH	280	tmp > dev->max_timeout)
4651918a ML	281	return -EINVAL;
4651918a ML	282
d8b4b582	283	dev->timeout = tmp;
4651918a ML	284	break;
	285
	286	case LIRC_SET_REC_TIMEOUT_REPORTS:
	287	lirc->send_timeout_reports = !!val;
ca414698 JW	288	break;
	289
	290	default:
044e5878	291	return lirc_dev_fop_ioctl(filep, cmd, arg);
ca414698 JW	292	}
ca414698 JW	293
e589333f	294	if (_IOC_DIR(cmd) & _IOC_READ)
06bd801c	295	ret = put_user(val, argp);
e589333f	296
ca414698 JW	297	return ret;
	298	}
	299
	300	static int ir_lirc_open(void *data)
	301	{
	302	return 0;
	303	}
	304
	305	static void ir_lirc_close(void *data)
	306	{
	307	return;
	308	}
	309
	310	static struct file_operations lirc_fops = {
	311	.owner = THIS_MODULE,
	312	.write = ir_lirc_transmit_ir,
044e5878	313	.unlocked_ioctl = ir_lirc_ioctl,
8be292cc JW	314	#ifdef CONFIG_COMPAT
	315	.compat_ioctl = ir_lirc_ioctl,
	316	#endif
ca414698 JW	317	.read = lirc_dev_fop_read,
	318	.poll = lirc_dev_fop_poll,
	319	.open = lirc_dev_fop_open,
	320	.release = lirc_dev_fop_close,
d9d2e9d5	321	.llseek = no_llseek,
ca414698 JW	322	};
ca414698 JW	323
d8b4b582	324	static int ir_lirc_register(struct rc_dev *dev)
ca414698	325	{
ca414698 JW	326	struct lirc_driver *drv;
	327	struct lirc_buffer *rbuf;
	328	int rc = -ENOMEM;
	329	unsigned long features;
	330
	331	drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
	332	if (!drv)
	333	return rc;
	334
	335	rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
49b7a12c	336	if (!rbuf)
ca414698 JW	337	goto rbuf_alloc_failed;
	338
	339	rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
	340	if (rc)
	341	goto rbuf_init_failed;
	342
	343	features = LIRC_CAN_REC_MODE2;
d8b4b582	344	if (dev->tx_ir) {
ca414698	345	features \|= LIRC_CAN_SEND_PULSE;
d8b4b582	346	if (dev->s_tx_mask)
ca414698	347	features \|= LIRC_CAN_SET_TRANSMITTER_MASK;
d8b4b582	348	if (dev->s_tx_carrier)
ca414698	349	features \|= LIRC_CAN_SET_SEND_CARRIER;
d8b4b582	350	if (dev->s_tx_duty_cycle)
67332ba8	351	features \|= LIRC_CAN_SET_SEND_DUTY_CYCLE;
ca414698 JW	352	}
ca414698 JW	353
d8b4b582	354	if (dev->s_rx_carrier_range)
e589333f ML	355	features \|= LIRC_CAN_SET_REC_CARRIER \|
	356	LIRC_CAN_SET_REC_CARRIER_RANGE;
	357
d8b4b582	358	if (dev->s_learning_mode)
e589333f ML	359	features \|= LIRC_CAN_USE_WIDEBAND_RECEIVER;
e589333f ML	360
d8b4b582	361	if (dev->s_carrier_report)
4651918a ML	362	features \|= LIRC_CAN_MEASURE_CARRIER;
4651918a ML	363
d8b4b582	364	if (dev->max_timeout)
e589333f ML	365	features \|= LIRC_CAN_SET_REC_TIMEOUT;
e589333f ML	366
ca414698	367	snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
d8b4b582	368	dev->driver_name);
ca414698 JW	369	drv->minor = -1;
ca414698 JW	370	drv->features = features;
d8b4b582	371	drv->data = &dev->raw->lirc;
ca414698 JW	372	drv->rbuf = rbuf;
	373	drv->set_use_inc = &ir_lirc_open;
	374	drv->set_use_dec = &ir_lirc_close;
	375	drv->code_length = sizeof(struct ir_raw_event) * 8;
	376	drv->fops = &lirc_fops;
d8b4b582	377	drv->dev = &dev->dev;
ca414698 JW	378	drv->owner = THIS_MODULE;
	379
	380	drv->minor = lirc_register_driver(drv);
	381	if (drv->minor < 0) {
	382	rc = -ENODEV;
	383	goto lirc_register_failed;
	384	}
	385
d8b4b582 DH	386	dev->raw->lirc.drv = drv;
d8b4b582 DH	387	dev->raw->lirc.dev = dev;
ca414698 JW	388	return 0;
	389
	390	lirc_register_failed:
	391	rbuf_init_failed:
	392	kfree(rbuf);
	393	rbuf_alloc_failed:
	394	kfree(drv);
	395
	396	return rc;
	397	}
	398
d8b4b582	399	static int ir_lirc_unregister(struct rc_dev *dev)
ca414698	400	{
d8b4b582	401	struct lirc_codec *lirc = &dev->raw->lirc;
ca414698 JW	402
	403	lirc_unregister_driver(lirc->drv->minor);
	404	lirc_buffer_free(lirc->drv->rbuf);
	405	kfree(lirc->drv);
	406
	407	return 0;
	408	}
	409
	410	static struct ir_raw_handler lirc_handler = {
c003ab1b	411	.protocols = RC_BIT_LIRC,
ca414698 JW	412	.decode = ir_lirc_decode,
	413	.raw_register = ir_lirc_register,
	414	.raw_unregister = ir_lirc_unregister,
	415	};
	416
	417	static int __init ir_lirc_codec_init(void)
	418	{
	419	ir_raw_handler_register(&lirc_handler);
	420
	421	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	422	return 0;
	423	}
	424
	425	static void __exit ir_lirc_codec_exit(void)
	426	{
	427	ir_raw_handler_unregister(&lirc_handler);
	428	}
	429
	430	module_init(ir_lirc_codec_init);
	431	module_exit(ir_lirc_codec_exit);
	432
	433	MODULE_LICENSE("GPL");
	434	MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
	435	MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
	436	MODULE_DESCRIPTION("LIRC IR handler bridge");