2010-07-03 00:07:53 -04:00
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/* ir-lirc-codec.c - ir-core to classic lirc interface bridge
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*
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* Copyright (C) 2010 by Jarod Wilson <jarod@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <media/lirc.h>
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2010-07-16 13:25:33 -04:00
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#include <media/lirc_dev.h>
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2010-11-17 11:28:38 -05:00
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#include <media/rc-core.h>
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2010-11-09 21:09:57 -05:00
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#include "rc-core-priv.h"
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2010-07-03 00:07:53 -04:00
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#define LIRCBUF_SIZE 256
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/**
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* ir_lirc_decode() - Send raw IR data to lirc_dev to be relayed to the
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* lircd userspace daemon for decoding.
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2010-10-29 15:08:23 -04:00
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* @input_dev: the struct rc_dev descriptor of the device
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2010-07-03 00:07:53 -04:00
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* @duration: the struct ir_raw_event descriptor of the pulse/space
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*
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* This function returns -EINVAL if the lirc interfaces aren't wired up.
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*/
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2010-10-29 15:08:23 -04:00
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static int ir_lirc_decode(struct rc_dev *dev, struct ir_raw_event ev)
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2010-07-03 00:07:53 -04:00
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{
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2010-10-29 15:08:23 -04:00
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struct lirc_codec *lirc = &dev->raw->lirc;
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2010-07-31 10:59:15 -04:00
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int sample;
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2010-07-03 00:07:53 -04:00
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2010-11-17 12:20:52 -05:00
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if (!(dev->raw->enabled_protocols & RC_TYPE_LIRC))
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2010-07-03 00:07:53 -04:00
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return 0;
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2010-10-29 15:08:23 -04:00
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if (!dev->raw->lirc.drv || !dev->raw->lirc.drv->rbuf)
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2010-07-03 00:07:53 -04:00
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return -EINVAL;
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2010-10-16 18:56:28 -04:00
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/* Packet start */
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if (ev.reset)
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2010-07-31 10:59:15 -04:00
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return 0;
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2010-10-16 18:56:28 -04:00
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/* Carrier reports */
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if (ev.carrier_report) {
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sample = LIRC_FREQUENCY(ev.carrier);
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2010-07-03 00:07:53 -04:00
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2010-10-16 18:56:28 -04:00
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/* Packet end */
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} else if (ev.timeout) {
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if (lirc->gap)
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return 0;
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lirc->gap_start = ktime_get();
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lirc->gap = true;
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lirc->gap_duration = ev.duration;
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if (!lirc->send_timeout_reports)
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return 0;
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sample = LIRC_TIMEOUT(ev.duration / 1000);
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/* Normal sample */
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} else {
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if (lirc->gap) {
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int gap_sample;
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lirc->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
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lirc->gap_start));
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/* Convert to ms and cap by LIRC_VALUE_MASK */
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do_div(lirc->gap_duration, 1000);
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lirc->gap_duration = min(lirc->gap_duration,
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(u64)LIRC_VALUE_MASK);
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gap_sample = LIRC_SPACE(lirc->gap_duration);
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2010-10-29 15:08:23 -04:00
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lirc_buffer_write(dev->raw->lirc.drv->rbuf,
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2010-10-16 18:56:28 -04:00
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(unsigned char *) &gap_sample);
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lirc->gap = false;
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}
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sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) :
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LIRC_SPACE(ev.duration / 1000);
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}
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2010-07-03 00:07:53 -04:00
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2010-10-29 15:08:23 -04:00
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lirc_buffer_write(dev->raw->lirc.drv->rbuf,
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2010-07-31 10:59:15 -04:00
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(unsigned char *) &sample);
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2010-10-29 15:08:23 -04:00
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wake_up(&dev->raw->lirc.drv->rbuf->wait_poll);
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2010-07-03 00:07:53 -04:00
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return 0;
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}
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static ssize_t ir_lirc_transmit_ir(struct file *file, const char *buf,
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size_t n, loff_t *ppos)
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{
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struct lirc_codec *lirc;
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2010-10-29 15:08:23 -04:00
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struct rc_dev *dev;
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2010-07-03 00:07:53 -04:00
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int *txbuf; /* buffer with values to transmit */
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int ret = 0, count;
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lirc = lirc_get_pdata(file);
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if (!lirc)
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return -EFAULT;
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if (n % sizeof(int))
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return -EINVAL;
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count = n / sizeof(int);
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if (count > LIRCBUF_SIZE || count % 2 == 0)
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return -EINVAL;
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2010-07-16 17:29:54 -04:00
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txbuf = memdup_user(buf, n);
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if (IS_ERR(txbuf))
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return PTR_ERR(txbuf);
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2010-07-03 00:07:53 -04:00
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2010-10-29 15:08:23 -04:00
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dev = lirc->dev;
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if (!dev) {
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2010-07-03 00:07:53 -04:00
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ret = -EFAULT;
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goto out;
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}
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2010-10-29 15:08:23 -04:00
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if (dev->tx_ir)
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ret = dev->tx_ir(dev, txbuf, (u32)n);
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2010-07-03 00:07:53 -04:00
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out:
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kfree(txbuf);
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return ret;
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}
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2010-07-31 10:59:23 -04:00
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static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
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unsigned long __user arg)
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2010-07-03 00:07:53 -04:00
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{
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struct lirc_codec *lirc;
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2010-10-29 15:08:23 -04:00
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struct rc_dev *dev;
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2010-07-03 00:07:53 -04:00
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int ret = 0;
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2010-10-16 18:56:28 -04:00
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__u32 val = 0, tmp;
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2010-07-03 00:07:53 -04:00
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lirc = lirc_get_pdata(filep);
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if (!lirc)
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return -EFAULT;
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2010-10-29 15:08:23 -04:00
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dev = lirc->dev;
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if (!dev)
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2010-07-03 00:07:53 -04:00
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return -EFAULT;
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2010-07-31 10:59:23 -04:00
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if (_IOC_DIR(cmd) & _IOC_WRITE) {
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2010-10-08 16:24:21 -04:00
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ret = get_user(val, (__u32 *)arg);
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2010-07-03 00:07:53 -04:00
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if (ret)
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return ret;
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2010-07-31 10:59:23 -04:00
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}
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switch (cmd) {
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/* legacy support */
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case LIRC_GET_SEND_MODE:
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val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK;
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break;
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case LIRC_SET_SEND_MODE:
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if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK))
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return -EINVAL;
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2010-10-16 18:56:28 -04:00
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return 0;
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2010-07-03 00:07:53 -04:00
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2010-07-31 10:59:23 -04:00
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/* TX settings */
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case LIRC_SET_TRANSMITTER_MASK:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_tx_mask)
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2010-07-03 00:07:53 -04:00
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return -EINVAL;
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2010-10-16 18:56:28 -04:00
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2010-10-29 15:08:23 -04:00
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return dev->s_tx_mask(dev, val);
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2010-07-03 00:07:53 -04:00
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case LIRC_SET_SEND_CARRIER:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_tx_carrier)
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2010-07-03 00:07:53 -04:00
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return -EINVAL;
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2010-10-16 18:56:28 -04:00
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2010-10-29 15:08:23 -04:00
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return dev->s_tx_carrier(dev, val);
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2010-07-03 00:07:53 -04:00
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2010-07-31 10:59:23 -04:00
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case LIRC_SET_SEND_DUTY_CYCLE:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_tx_duty_cycle)
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2010-07-31 10:59:23 -04:00
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return -ENOSYS;
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if (val <= 0 || val >= 100)
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return -EINVAL;
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2010-10-29 15:08:23 -04:00
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return dev->s_tx_duty_cycle(dev, val);
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2010-07-03 00:07:53 -04:00
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2010-07-31 10:59:23 -04:00
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/* RX settings */
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case LIRC_SET_REC_CARRIER:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_rx_carrier_range)
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2010-07-31 10:59:23 -04:00
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return -ENOSYS;
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2010-07-03 00:07:53 -04:00
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2010-10-16 18:56:28 -04:00
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if (val <= 0)
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return -EINVAL;
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2010-10-29 15:08:23 -04:00
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return dev->s_rx_carrier_range(dev,
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dev->raw->lirc.carrier_low,
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val);
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2010-07-31 10:59:23 -04:00
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case LIRC_SET_REC_CARRIER_RANGE:
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2010-10-16 18:56:28 -04:00
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if (val <= 0)
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return -EINVAL;
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2010-07-31 10:59:23 -04:00
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2010-10-29 15:08:23 -04:00
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dev->raw->lirc.carrier_low = val;
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2010-10-16 18:56:28 -04:00
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return 0;
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2010-07-31 10:59:23 -04:00
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case LIRC_GET_REC_RESOLUTION:
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2010-10-29 15:08:23 -04:00
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val = dev->rx_resolution;
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2010-07-31 10:59:23 -04:00
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break;
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case LIRC_SET_WIDEBAND_RECEIVER:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_learning_mode)
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2010-07-31 10:59:23 -04:00
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return -ENOSYS;
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2010-10-29 15:08:23 -04:00
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return dev->s_learning_mode(dev, !!val);
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2010-10-16 18:56:28 -04:00
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case LIRC_SET_MEASURE_CARRIER_MODE:
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2010-10-29 15:08:23 -04:00
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if (!dev->s_carrier_report)
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2010-10-16 18:56:28 -04:00
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return -ENOSYS;
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2010-10-29 15:08:23 -04:00
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return dev->s_carrier_report(dev, !!val);
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2010-10-16 18:56:28 -04:00
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2010-07-31 10:59:23 -04:00
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/* Generic timeout support */
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case LIRC_GET_MIN_TIMEOUT:
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2010-10-29 15:08:23 -04:00
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if (!dev->max_timeout)
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2010-07-31 10:59:23 -04:00
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return -ENOSYS;
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2010-10-29 15:08:23 -04:00
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val = dev->min_timeout / 1000;
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2010-07-31 10:59:23 -04:00
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break;
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case LIRC_GET_MAX_TIMEOUT:
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2010-10-29 15:08:23 -04:00
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if (!dev->max_timeout)
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2010-07-31 10:59:23 -04:00
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return -ENOSYS;
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2010-10-29 15:08:23 -04:00
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val = dev->max_timeout / 1000;
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2010-07-31 10:59:23 -04:00
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break;
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case LIRC_SET_REC_TIMEOUT:
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2010-10-29 15:08:23 -04:00
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if (!dev->max_timeout)
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2010-10-16 18:56:28 -04:00
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return -ENOSYS;
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tmp = val * 1000;
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2010-10-29 15:08:23 -04:00
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if (tmp < dev->min_timeout ||
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tmp > dev->max_timeout)
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2010-10-16 18:56:28 -04:00
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return -EINVAL;
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2010-10-29 15:08:23 -04:00
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dev->timeout = tmp;
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2010-10-16 18:56:28 -04:00
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break;
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case LIRC_SET_REC_TIMEOUT_REPORTS:
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lirc->send_timeout_reports = !!val;
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2010-07-03 00:07:53 -04:00
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break;
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default:
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2010-08-02 14:43:35 -04:00
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return lirc_dev_fop_ioctl(filep, cmd, arg);
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2010-07-03 00:07:53 -04:00
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}
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2010-07-31 10:59:23 -04:00
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if (_IOC_DIR(cmd) & _IOC_READ)
|
2010-10-08 16:24:21 -04:00
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ret = put_user(val, (__u32 *)arg);
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2010-07-31 10:59:23 -04:00
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2010-07-03 00:07:53 -04:00
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return ret;
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}
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static int ir_lirc_open(void *data)
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{
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return 0;
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}
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static void ir_lirc_close(void *data)
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{
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return;
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}
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static struct file_operations lirc_fops = {
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.owner = THIS_MODULE,
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.write = ir_lirc_transmit_ir,
|
2010-08-02 14:43:35 -04:00
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.unlocked_ioctl = ir_lirc_ioctl,
|
2010-10-09 14:07:06 -04:00
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ir_lirc_ioctl,
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#endif
|
2010-07-03 00:07:53 -04:00
|
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.read = lirc_dev_fop_read,
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.poll = lirc_dev_fop_poll,
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.open = lirc_dev_fop_open,
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.release = lirc_dev_fop_close,
|
2010-08-15 12:51:56 -04:00
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.llseek = no_llseek,
|
2010-07-03 00:07:53 -04:00
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};
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|
2010-10-29 15:08:23 -04:00
|
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|
static int ir_lirc_register(struct rc_dev *dev)
|
2010-07-03 00:07:53 -04:00
|
|
|
{
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|
|
|
struct lirc_driver *drv;
|
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|
|
struct lirc_buffer *rbuf;
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|
|
int rc = -ENOMEM;
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|
|
unsigned long features;
|
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|
drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
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if (!drv)
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return rc;
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|
|
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|
|
rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
|
2010-07-23 06:08:26 -04:00
|
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if (!rbuf)
|
2010-07-03 00:07:53 -04:00
|
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|
goto rbuf_alloc_failed;
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|
rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
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if (rc)
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goto rbuf_init_failed;
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|
|
|
features = LIRC_CAN_REC_MODE2;
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->tx_ir) {
|
2010-07-03 00:07:53 -04:00
|
|
|
features |= LIRC_CAN_SEND_PULSE;
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_tx_mask)
|
2010-07-03 00:07:53 -04:00
|
|
|
features |= LIRC_CAN_SET_TRANSMITTER_MASK;
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_tx_carrier)
|
2010-07-03 00:07:53 -04:00
|
|
|
features |= LIRC_CAN_SET_SEND_CARRIER;
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_tx_duty_cycle)
|
2010-09-06 17:26:08 -04:00
|
|
|
features |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
|
2010-07-03 00:07:53 -04:00
|
|
|
}
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_rx_carrier_range)
|
2010-07-31 10:59:23 -04:00
|
|
|
features |= LIRC_CAN_SET_REC_CARRIER |
|
|
|
|
LIRC_CAN_SET_REC_CARRIER_RANGE;
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_learning_mode)
|
2010-07-31 10:59:23 -04:00
|
|
|
features |= LIRC_CAN_USE_WIDEBAND_RECEIVER;
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->s_carrier_report)
|
2010-10-16 18:56:28 -04:00
|
|
|
features |= LIRC_CAN_MEASURE_CARRIER;
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
if (dev->max_timeout)
|
2010-07-31 10:59:23 -04:00
|
|
|
features |= LIRC_CAN_SET_REC_TIMEOUT;
|
|
|
|
|
2010-07-03 00:07:53 -04:00
|
|
|
snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)",
|
2010-10-29 15:08:23 -04:00
|
|
|
dev->driver_name);
|
2010-07-03 00:07:53 -04:00
|
|
|
drv->minor = -1;
|
|
|
|
drv->features = features;
|
2010-10-29 15:08:23 -04:00
|
|
|
drv->data = &dev->raw->lirc;
|
2010-07-03 00:07:53 -04:00
|
|
|
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;
|
2010-10-29 15:08:23 -04:00
|
|
|
drv->dev = &dev->dev;
|
2010-07-03 00:07:53 -04:00
|
|
|
drv->owner = THIS_MODULE;
|
|
|
|
|
|
|
|
drv->minor = lirc_register_driver(drv);
|
|
|
|
if (drv->minor < 0) {
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto lirc_register_failed;
|
|
|
|
}
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
dev->raw->lirc.drv = drv;
|
|
|
|
dev->raw->lirc.dev = dev;
|
2010-07-03 00:07:53 -04:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
lirc_register_failed:
|
|
|
|
rbuf_init_failed:
|
|
|
|
kfree(rbuf);
|
|
|
|
rbuf_alloc_failed:
|
|
|
|
kfree(drv);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2010-10-29 15:08:23 -04:00
|
|
|
static int ir_lirc_unregister(struct rc_dev *dev)
|
2010-07-03 00:07:53 -04:00
|
|
|
{
|
2010-10-29 15:08:23 -04:00
|
|
|
struct lirc_codec *lirc = &dev->raw->lirc;
|
2010-07-03 00:07:53 -04:00
|
|
|
|
|
|
|
lirc_unregister_driver(lirc->drv->minor);
|
|
|
|
lirc_buffer_free(lirc->drv->rbuf);
|
|
|
|
kfree(lirc->drv);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ir_raw_handler lirc_handler = {
|
2010-11-17 12:20:52 -05:00
|
|
|
.protocols = RC_TYPE_LIRC,
|
2010-07-03 00:07:53 -04:00
|
|
|
.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");
|