[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->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 __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 = 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 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 -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, 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_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>
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
52b66144	38	if (!(dev->raw->enabled_protocols & RC_TYPE_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 DH	107	unsigned int txbuf; / buffer with values to transmit */
5588dc2b DH	108	ssize_t ret = 0;
4c8b8698	109	size_t count;
ca414698 JW	110
	111	lirc = lirc_get_pdata(file);
	112	if (!lirc)
	113	return -EFAULT;
	114
5588dc2b	115	if (n < sizeof(unsigned) \|\| n % sizeof(unsigned))
ca414698 JW	116	return -EINVAL;
ca414698 JW	117
5588dc2b DH	118	count = n / sizeof(unsigned);
5588dc2b DH	119	if (count > LIRCBUF_SIZE \|\| count % 2 == 0)
ca414698 JW	120	return -EINVAL;
ca414698 JW	121
6efb870a JW	122	txbuf = memdup_user(buf, n);
	123	if (IS_ERR(txbuf))
	124	return PTR_ERR(txbuf);
ca414698	125
d8b4b582 DH	126	dev = lirc->dev;
d8b4b582 DH	127	if (!dev) {
ca414698 JW	128	ret = -EFAULT;
	129	goto out;
	130	}
	131
d8b4b582	132	if (dev->tx_ir)
5588dc2b DH	133	ret = dev->tx_ir(dev, txbuf, count);
	134
	135	if (ret > 0)
	136	ret *= sizeof(unsigned);
ca414698 JW	137
	138	out:
	139	kfree(txbuf);
	140	return ret;
	141	}
	142
e589333f	143	static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
06bd801c	144	unsigned long arg)
ca414698 JW	145	{
ca414698 JW	146	struct lirc_codec *lirc;
d8b4b582	147	struct rc_dev *dev;
06bd801c	148	u32 __user argp = (u32 __user )(arg);
ca414698	149	int ret = 0;
4651918a	150	__u32 val = 0, tmp;
ca414698 JW	151
	152	lirc = lirc_get_pdata(filep);
	153	if (!lirc)
	154	return -EFAULT;
	155
d8b4b582 DH	156	dev = lirc->dev;
d8b4b582 DH	157	if (!dev)
ca414698 JW	158	return -EFAULT;
ca414698 JW	159
e589333f	160	if (_IOC_DIR(cmd) & _IOC_WRITE) {
06bd801c	161	ret = get_user(val, argp);
ca414698 JW	162	if (ret)
ca414698 JW	163	return ret;
e589333f ML	164	}
	165
	166	switch (cmd) {
	167
	168	/* legacy support */
	169	case LIRC_GET_SEND_MODE:
	170	val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
	171	break;
	172
	173	case LIRC_SET_SEND_MODE:
	174	if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
	175	return -EINVAL;
4651918a	176	return 0;
ca414698	177
e589333f ML	178	/* TX settings */
e589333f ML	179	case LIRC_SET_TRANSMITTER_MASK:
d8b4b582	180	if (!dev->s_tx_mask)
ca414698	181	return -EINVAL;
4651918a	182
d8b4b582	183	return dev->s_tx_mask(dev, val);
ca414698 JW	184
ca414698 JW	185	case LIRC_SET_SEND_CARRIER:
d8b4b582	186	if (!dev->s_tx_carrier)
ca414698	187	return -EINVAL;
4651918a	188
d8b4b582	189	return dev->s_tx_carrier(dev, val);
ca414698	190
e589333f	191	case LIRC_SET_SEND_DUTY_CYCLE:
d8b4b582	192	if (!dev->s_tx_duty_cycle)
e589333f ML	193	return -ENOSYS;
	194
	195	if (val <= 0 \|\| val >= 100)
	196	return -EINVAL;
	197
d8b4b582	198	return dev->s_tx_duty_cycle(dev, val);
ca414698	199
e589333f ML	200	/* RX settings */
e589333f ML	201	case LIRC_SET_REC_CARRIER:
d8b4b582	202	if (!dev->s_rx_carrier_range)
e589333f	203	return -ENOSYS;
ca414698	204
4651918a ML	205	if (val <= 0)
	206	return -EINVAL;
	207
d8b4b582 DH	208	return dev->s_rx_carrier_range(dev,
	209	dev->raw->lirc.carrier_low,
	210	val);
e589333f ML	211
e589333f ML	212	case LIRC_SET_REC_CARRIER_RANGE:
4651918a ML	213	if (val <= 0)
4651918a ML	214	return -EINVAL;
e589333f	215
d8b4b582	216	dev->raw->lirc.carrier_low = val;
4651918a	217	return 0;
e589333f ML	218
e589333f ML	219	case LIRC_GET_REC_RESOLUTION:
d8b4b582	220	val = dev->rx_resolution;
e589333f ML	221	break;
	222
	223	case LIRC_SET_WIDEBAND_RECEIVER:
d8b4b582	224	if (!dev->s_learning_mode)
e589333f ML	225	return -ENOSYS;
e589333f ML	226
d8b4b582	227	return dev->s_learning_mode(dev, !!val);
4651918a ML	228
4651918a ML	229	case LIRC_SET_MEASURE_CARRIER_MODE:
d8b4b582	230	if (!dev->s_carrier_report)
4651918a ML	231	return -ENOSYS;
4651918a ML	232
d8b4b582	233	return dev->s_carrier_report(dev, !!val);
4651918a	234
e589333f ML	235	/* Generic timeout support */
e589333f ML	236	case LIRC_GET_MIN_TIMEOUT:
d8b4b582	237	if (!dev->max_timeout)
e589333f	238	return -ENOSYS;
d8b4b582	239	val = dev->min_timeout / 1000;
e589333f ML	240	break;
	241
	242	case LIRC_GET_MAX_TIMEOUT:
d8b4b582	243	if (!dev->max_timeout)
e589333f	244	return -ENOSYS;
d8b4b582	245	val = dev->max_timeout / 1000;
e589333f ML	246	break;
	247
	248	case LIRC_SET_REC_TIMEOUT:
d8b4b582	249	if (!dev->max_timeout)
4651918a ML	250	return -ENOSYS;
	251
	252	tmp = val * 1000;
	253
d8b4b582 DH	254	if (tmp < dev->min_timeout \|\|
d8b4b582 DH	255	tmp > dev->max_timeout)
4651918a ML	256	return -EINVAL;
4651918a ML	257
d8b4b582	258	dev->timeout = tmp;
4651918a ML	259	break;
	260
	261	case LIRC_SET_REC_TIMEOUT_REPORTS:
	262	lirc->send_timeout_reports = !!val;
ca414698 JW	263	break;
	264
	265	default:
044e5878	266	return lirc_dev_fop_ioctl(filep, cmd, arg);
ca414698 JW	267	}
ca414698 JW	268
e589333f	269	if (_IOC_DIR(cmd) & _IOC_READ)
06bd801c	270	ret = put_user(val, argp);
e589333f	271
ca414698 JW	272	return ret;
	273	}
	274
	275	static int ir_lirc_open(void *data)
	276	{
	277	return 0;
	278	}
	279
	280	static void ir_lirc_close(void *data)
	281	{
	282	return;
	283	}
	284
	285	static struct file_operations lirc_fops = {
	286	.owner = THIS_MODULE,
	287	.write = ir_lirc_transmit_ir,
044e5878	288	.unlocked_ioctl = ir_lirc_ioctl,
8be292cc JW	289	#ifdef CONFIG_COMPAT
	290	.compat_ioctl = ir_lirc_ioctl,
	291	#endif
ca414698 JW	292	.read = lirc_dev_fop_read,
	293	.poll = lirc_dev_fop_poll,
	294	.open = lirc_dev_fop_open,
	295	.release = lirc_dev_fop_close,
d9d2e9d5	296	.llseek = no_llseek,
ca414698 JW	297	};
ca414698 JW	298
d8b4b582	299	static int ir_lirc_register(struct rc_dev *dev)
ca414698	300	{
ca414698 JW	301	struct lirc_driver *drv;
	302	struct lirc_buffer *rbuf;
	303	int rc = -ENOMEM;
	304	unsigned long features;
	305
	306	drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
	307	if (!drv)
	308	return rc;
	309
	310	rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
49b7a12c	311	if (!rbuf)
ca414698 JW	312	goto rbuf_alloc_failed;
	313
	314	rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
	315	if (rc)
	316	goto rbuf_init_failed;
	317
	318	features = LIRC_CAN_REC_MODE2;
d8b4b582	319	if (dev->tx_ir) {
ca414698	320	features \|= LIRC_CAN_SEND_PULSE;
d8b4b582	321	if (dev->s_tx_mask)
ca414698	322	features \|= LIRC_CAN_SET_TRANSMITTER_MASK;
d8b4b582	323	if (dev->s_tx_carrier)
ca414698	324	features \|= LIRC_CAN_SET_SEND_CARRIER;
d8b4b582	325	if (dev->s_tx_duty_cycle)
67332ba8	326	features \|= LIRC_CAN_SET_SEND_DUTY_CYCLE;
ca414698 JW	327	}
ca414698 JW	328
d8b4b582	329	if (dev->s_rx_carrier_range)
e589333f ML	330	features \|= LIRC_CAN_SET_REC_CARRIER \|
	331	LIRC_CAN_SET_REC_CARRIER_RANGE;
	332
d8b4b582	333	if (dev->s_learning_mode)
e589333f ML	334	features \|= LIRC_CAN_USE_WIDEBAND_RECEIVER;
e589333f ML	335
d8b4b582	336	if (dev->s_carrier_report)
4651918a ML	337	features \|= LIRC_CAN_MEASURE_CARRIER;
4651918a ML	338
d8b4b582	339	if (dev->max_timeout)
e589333f ML	340	features \|= LIRC_CAN_SET_REC_TIMEOUT;
e589333f ML	341
ca414698	342	snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
d8b4b582	343	dev->driver_name);
ca414698 JW	344	drv->minor = -1;
ca414698 JW	345	drv->features = features;
d8b4b582	346	drv->data = &dev->raw->lirc;
ca414698 JW	347	drv->rbuf = rbuf;
	348	drv->set_use_inc = &ir_lirc_open;
	349	drv->set_use_dec = &ir_lirc_close;
	350	drv->code_length = sizeof(struct ir_raw_event) * 8;
	351	drv->fops = &lirc_fops;
d8b4b582	352	drv->dev = &dev->dev;
ca414698 JW	353	drv->owner = THIS_MODULE;
	354
	355	drv->minor = lirc_register_driver(drv);
	356	if (drv->minor < 0) {
	357	rc = -ENODEV;
	358	goto lirc_register_failed;
	359	}
	360
d8b4b582 DH	361	dev->raw->lirc.drv = drv;
d8b4b582 DH	362	dev->raw->lirc.dev = dev;
ca414698 JW	363	return 0;
	364
	365	lirc_register_failed:
	366	rbuf_init_failed:
	367	kfree(rbuf);
	368	rbuf_alloc_failed:
	369	kfree(drv);
	370
	371	return rc;
	372	}
	373
d8b4b582	374	static int ir_lirc_unregister(struct rc_dev *dev)
ca414698	375	{
d8b4b582	376	struct lirc_codec *lirc = &dev->raw->lirc;
ca414698 JW	377
	378	lirc_unregister_driver(lirc->drv->minor);
	379	lirc_buffer_free(lirc->drv->rbuf);
	380	kfree(lirc->drv);
	381
	382	return 0;
	383	}
	384
	385	static struct ir_raw_handler lirc_handler = {
52b66144	386	.protocols = RC_TYPE_LIRC,
ca414698 JW	387	.decode = ir_lirc_decode,
	388	.raw_register = ir_lirc_register,
	389	.raw_unregister = ir_lirc_unregister,
	390	};
	391
	392	static int __init ir_lirc_codec_init(void)
	393	{
	394	ir_raw_handler_register(&lirc_handler);
	395
	396	printk(KERN_INFO "IR LIRC bridge handler initialized\n");
	397	return 0;
	398	}
	399
	400	static void __exit ir_lirc_codec_exit(void)
	401	{
	402	ir_raw_handler_unregister(&lirc_handler);
	403	}
	404
	405	module_init(ir_lirc_codec_init);
	406	module_exit(ir_lirc_codec_exit);
	407
	408	MODULE_LICENSE("GPL");
	409	MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
	410	MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
	411	MODULE_DESCRIPTION("LIRC IR handler bridge");