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media: rc: move ir-lirc-codec.c contents into lirc_dev.c

Browse Source 
Since removing the lirc kapi, ir-lirc-codec.c only contains lirc fops
so the file name is no longer correct. By moving its content into
lirc_dev.c the ugly extern struct lirc_fops is not longer needed,
and everything lirc related is in one file.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2017-11-02 16:39:16 -04:00 committed by Mauro Carvalho Chehab
parent 8a866fee39
commit 42e0442f8a
4 changed files with 605 additions and 626 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/rc/Makefile
View File

@ -4,7 +4,7 @@ obj-y += keymaps/
obj-$(CONFIG_RC_CORE) += rc-core.o
rc-core-y := rc-main.o rc-ir-raw.o
rc-core-$(CONFIG_LIRC) += lirc_dev.o ir-lirc-codec.o
rc-core-$(CONFIG_LIRC) += lirc_dev.o
obj-$(CONFIG_IR_NEC_DECODER) += ir-nec-decoder.o
obj-$(CONFIG_IR_RC5_DECODER) += ir-rc5-decoder.o
obj-$(CONFIG_IR_RC6_DECODER) += ir-rc6-decoder.o

623
drivers/media/rc/ir-lirc-codec.c
View File

@ -1,623 +0,0 @@
/* 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/poll.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <media/lirc.h>
#include <media/rc-core.h>
#include "rc-core-priv.h"
#define LIRCBUF_SIZE 256
/**
* ir_lirc_raw_event() - Send raw IR data to lirc to be relayed to userspace
*
* @dev: the struct rc_dev descriptor of the device
* @ev: the struct ir_raw_event descriptor of the pulse/space
*/
void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev)
{
int sample;
/* 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 (dev->gap)
return;
dev->gap_start = ktime_get();
dev->gap = true;
dev->gap_duration = ev.duration;
if (!dev->send_timeout_reports)
return;
sample = LIRC_TIMEOUT(ev.duration / 1000);
IR_dprintk(2, "timeout report (duration: %d)\n", sample);
/* Normal sample */
} else {
if (dev->gap) {
dev->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
dev->gap_start));
/* Convert to ms and cap by LIRC_VALUE_MASK */
do_div(dev->gap_duration, 1000);
dev->gap_duration = min_t(u64, dev->gap_duration,
LIRC_VALUE_MASK);
kfifo_put(&dev->rawir, LIRC_SPACE(dev->gap_duration));
dev->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));
}
kfifo_put(&dev->rawir, sample);
wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM);
}
/**
* ir_lirc_scancode_event() - Send scancode data to lirc to be relayed to
* userspace
* @dev: the struct rc_dev descriptor of the device
* @lsc: the struct lirc_scancode describing the decoded scancode
*/
void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc)
{
lsc->timestamp = ktime_get_ns();
if (kfifo_put(&dev->scancodes, *lsc))
wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM);
}
EXPORT_SYMBOL_GPL(ir_lirc_scancode_event);
static int ir_lirc_open(struct inode *inode, struct file *file)
{
struct rc_dev *dev = container_of(inode->i_cdev, struct rc_dev,
lirc_cdev);
int retval;
retval = rc_open(dev);
if (retval)
return retval;
retval = mutex_lock_interruptible(&dev->lock);
if (retval)
goto out_rc;
if (!dev->registered) {
retval = -ENODEV;
goto out_unlock;
}
if (dev->lirc_open) {
retval = -EBUSY;
goto out_unlock;
}
if (dev->driver_type == RC_DRIVER_IR_RAW)
kfifo_reset_out(&dev->rawir);
if (dev->driver_type != RC_DRIVER_IR_RAW_TX)
kfifo_reset_out(&dev->scancodes);
dev->lirc_open++;
file->private_data = dev;
nonseekable_open(inode, file);
mutex_unlock(&dev->lock);
return 0;
out_unlock:
mutex_unlock(&dev->lock);
out_rc:
rc_close(dev);
return retval;
}
static int ir_lirc_close(struct inode *inode, struct file *file)
{
struct rc_dev *dev = file->private_data;
mutex_lock(&dev->lock);
dev->lirc_open--;
mutex_unlock(&dev->lock);
rc_close(dev);
return 0;
}
static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
size_t n, loff_t *ppos)
{
struct rc_dev *dev = file->private_data;
unsigned int *txbuf = NULL;
struct ir_raw_event *raw = NULL;
ssize_t ret = -EINVAL;
size_t count;
ktime_t start;
s64 towait;
unsigned int duration = 0; /* signal duration in us */
int i;
if (!dev->registered)
return -ENODEV;
start = ktime_get();
if (!dev->tx_ir) {
ret = -EINVAL;
goto out;
}
if (dev->send_mode == LIRC_MODE_SCANCODE) {
struct lirc_scancode scan;
if (n != sizeof(scan))
return -EINVAL;
if (copy_from_user(&scan, buf, sizeof(scan)))
return -EFAULT;
if (scan.flags || scan.keycode || scan.timestamp)
return -EINVAL;
/*
* The scancode field in lirc_scancode is 64-bit simply
* to future-proof it, since there are IR protocols encode
* use more than 32 bits. For now only 32-bit protocols
* are supported.
*/
if (scan.scancode > U32_MAX ||
!rc_validate_scancode(scan.rc_proto, scan.scancode))
return -EINVAL;
raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL);
if (!raw)
return -ENOMEM;
ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode,
raw, LIRCBUF_SIZE);
if (ret < 0)
goto out;
count = ret;
txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL);
if (!txbuf) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < count; i++)
/* Convert from NS to US */
txbuf[i] = DIV_ROUND_UP(raw[i].duration, 1000);
if (dev->s_tx_carrier) {
int carrier = ir_raw_encode_carrier(scan.rc_proto);
if (carrier > 0)
dev->s_tx_carrier(dev, carrier);
}
} else {
if (n < sizeof(unsigned int) || n % sizeof(unsigned int))
return -EINVAL;
count = n / sizeof(unsigned int);
if (count > LIRCBUF_SIZE || count % 2 == 0)
return -EINVAL;
txbuf = memdup_user(buf, n);
if (IS_ERR(txbuf))
return PTR_ERR(txbuf);
}
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;
if (dev->send_mode == LIRC_MODE_SCANCODE) {
ret = n;
} else {
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);
kfree(raw);
return ret;
}
static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
unsigned long arg)
{
struct rc_dev *dev = filep->private_data;
u32 __user *argp = (u32 __user *)(arg);
int ret = 0;
__u32 val = 0, tmp;
if (_IOC_DIR(cmd) & _IOC_WRITE) {
ret = get_user(val, argp);
if (ret)
return ret;
}
if (!dev->registered)
return -ENODEV;
switch (cmd) {
case LIRC_GET_FEATURES:
if (dev->driver_type == RC_DRIVER_SCANCODE)
val |= LIRC_CAN_REC_SCANCODE;
if (dev->driver_type == RC_DRIVER_IR_RAW) {
val |= LIRC_CAN_REC_MODE2 | LIRC_CAN_REC_SCANCODE;
if (dev->rx_resolution)
val |= LIRC_CAN_GET_REC_RESOLUTION;
}
if (dev->tx_ir) {
val |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE;
if (dev->s_tx_mask)
val |= LIRC_CAN_SET_TRANSMITTER_MASK;
if (dev->s_tx_carrier)
val |= LIRC_CAN_SET_SEND_CARRIER;
if (dev->s_tx_duty_cycle)
val |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
}
if (dev->s_rx_carrier_range)
val |= LIRC_CAN_SET_REC_CARRIER |
LIRC_CAN_SET_REC_CARRIER_RANGE;
if (dev->s_learning_mode)
val |= LIRC_CAN_USE_WIDEBAND_RECEIVER;
if (dev->s_carrier_report)
val |= LIRC_CAN_MEASURE_CARRIER;
if (dev->max_timeout)
val |= LIRC_CAN_SET_REC_TIMEOUT;
break;
/* mode support */
case LIRC_GET_REC_MODE:
if (dev->driver_type == RC_DRIVER_IR_RAW_TX)
return -ENOTTY;
val = dev->rec_mode;
break;
case LIRC_SET_REC_MODE:
switch (dev->driver_type) {
case RC_DRIVER_IR_RAW_TX:
return -ENOTTY;
case RC_DRIVER_SCANCODE:
if (val != LIRC_MODE_SCANCODE)
return -EINVAL;
break;
case RC_DRIVER_IR_RAW:
if (!(val == LIRC_MODE_MODE2 ||
val == LIRC_MODE_SCANCODE))
return -EINVAL;
break;
}
dev->rec_mode = val;
return 0;
case LIRC_GET_SEND_MODE:
if (!dev->tx_ir)
return -ENOTTY;
val = dev->send_mode;
break;
case LIRC_SET_SEND_MODE:
if (!dev->tx_ir)
return -ENOTTY;
if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE))
return -EINVAL;
dev->send_mode = val;
return 0;
/* TX settings */
case LIRC_SET_TRANSMITTER_MASK:
if (!dev->s_tx_mask)
return -ENOTTY;
return dev->s_tx_mask(dev, val);
case LIRC_SET_SEND_CARRIER:
if (!dev->s_tx_carrier)
return -ENOTTY;
return dev->s_tx_carrier(dev, val);
case LIRC_SET_SEND_DUTY_CYCLE:
if (!dev->s_tx_duty_cycle)
return -ENOTTY;
if (val <= 0 || val >= 100)
return -EINVAL;
return dev->s_tx_duty_cycle(dev, val);
/* RX settings */
case LIRC_SET_REC_CARRIER:
if (!dev->s_rx_carrier_range)
return -ENOTTY;
if (val <= 0)
return -EINVAL;
return dev->s_rx_carrier_range(dev,
dev->carrier_low,
val);
case LIRC_SET_REC_CARRIER_RANGE:
if (!dev->s_rx_carrier_range)
return -ENOTTY;
if (val <= 0)
return -EINVAL;
dev->carrier_low = val;
return 0;
case LIRC_GET_REC_RESOLUTION:
if (!dev->rx_resolution)
return -ENOTTY;
val = dev->rx_resolution / 1000;
break;
case LIRC_SET_WIDEBAND_RECEIVER:
if (!dev->s_learning_mode)
return -ENOTTY;
return dev->s_learning_mode(dev, !!val);
case LIRC_SET_MEASURE_CARRIER_MODE:
if (!dev->s_carrier_report)
return -ENOTTY;
return dev->s_carrier_report(dev, !!val);
/* Generic timeout support */
case LIRC_GET_MIN_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
val = DIV_ROUND_UP(dev->min_timeout, 1000);
break;
case LIRC_GET_MAX_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
val = dev->max_timeout / 1000;
break;
case LIRC_SET_REC_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
/* Check for multiply overflow */
if (val > U32_MAX / 1000)
return -EINVAL;
tmp = val * 1000;
if (tmp < dev->min_timeout || tmp > dev->max_timeout)
return -EINVAL;
if (dev->s_timeout)
ret = dev->s_timeout(dev, tmp);
if (!ret)
dev->timeout = tmp;
break;
case LIRC_SET_REC_TIMEOUT_REPORTS:
if (!dev->timeout)
return -ENOTTY;
dev->send_timeout_reports = !!val;
break;
default:
return -ENOTTY;
}
if (_IOC_DIR(cmd) & _IOC_READ)
ret = put_user(val, argp);
return ret;
}
static unsigned int ir_lirc_poll(struct file *file,
struct poll_table_struct *wait)
{
struct rc_dev *rcdev = file->private_data;
unsigned int events = 0;
poll_wait(file, &rcdev->wait_poll, wait);
if (!rcdev->registered) {
events = POLLHUP | POLLERR;
} else if (rcdev->driver_type != RC_DRIVER_IR_RAW_TX) {
if (rcdev->rec_mode == LIRC_MODE_SCANCODE &&
!kfifo_is_empty(&rcdev->scancodes))
events = POLLIN | POLLRDNORM;
if (rcdev->rec_mode == LIRC_MODE_MODE2 &&
!kfifo_is_empty(&rcdev->rawir))
events = POLLIN | POLLRDNORM;
}
return events;
}
static ssize_t ir_lirc_read_mode2(struct file *file, char __user *buffer,
size_t length)
{
struct rc_dev *rcdev = file->private_data;
unsigned int copied;
int ret;
if (length < sizeof(unsigned int) || length % sizeof(unsigned int))
return -EINVAL;
do {
if (kfifo_is_empty(&rcdev->rawir)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible(rcdev->wait_poll,
!kfifo_is_empty(&rcdev->rawir) ||
!rcdev->registered);
if (ret)
return ret;
}
if (!rcdev->registered)
return -ENODEV;
ret = mutex_lock_interruptible(&rcdev->lock);
if (ret)
return ret;
ret = kfifo_to_user(&rcdev->rawir, buffer, length, &copied);
mutex_unlock(&rcdev->lock);
if (ret)
return ret;
} while (copied == 0);
return copied;
}
static ssize_t ir_lirc_read_scancode(struct file *file, char __user *buffer,
size_t length)
{
struct rc_dev *rcdev = file->private_data;
unsigned int copied;
int ret;
if (length < sizeof(struct lirc_scancode) ||
length % sizeof(struct lirc_scancode))
return -EINVAL;
do {
if (kfifo_is_empty(&rcdev->scancodes)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible(rcdev->wait_poll,
!kfifo_is_empty(&rcdev->scancodes) ||
!rcdev->registered);
if (ret)
return ret;
}
if (!rcdev->registered)
return -ENODEV;
ret = mutex_lock_interruptible(&rcdev->lock);
if (ret)
return ret;
ret = kfifo_to_user(&rcdev->scancodes, buffer, length, &copied);
mutex_unlock(&rcdev->lock);
if (ret)
return ret;
} while (copied == 0);
return copied;
}
static ssize_t ir_lirc_read(struct file *file, char __user *buffer,
size_t length, loff_t *ppos)
{
struct rc_dev *rcdev = file->private_data;
if (rcdev->driver_type == RC_DRIVER_IR_RAW_TX)
return -EINVAL;
if (!rcdev->registered)
return -ENODEV;
if (rcdev->rec_mode == LIRC_MODE_MODE2)
return ir_lirc_read_mode2(file, buffer, length);
else /* LIRC_MODE_SCANCODE */
return ir_lirc_read_scancode(file, buffer, length);
}
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 = ir_lirc_read,
.poll = ir_lirc_poll,
.open = ir_lirc_open,
.release = ir_lirc_close,
.llseek = no_llseek,
};

604
drivers/media/rc/lirc_dev.c
View File

@ -22,11 +22,14 @@
#include <linux/device.h>
#include <linux/idr.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include "rc-core-priv.h"
#include <media/lirc.h>
#define LOGHEAD "lirc_dev (%s[%d]): "
#define LIRCBUF_SIZE 256
static dev_t lirc_base_dev;
@ -36,6 +39,607 @@ static DEFINE_IDA(lirc_ida);
/* Only used for sysfs but defined to void otherwise */
static struct class *lirc_class;
/**
* ir_lirc_raw_event() - Send raw IR data to lirc to be relayed to userspace
*
* @dev: the struct rc_dev descriptor of the device
* @ev: the struct ir_raw_event descriptor of the pulse/space
*/
void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev)
{
int sample;
/* 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 (dev->gap)
return;
dev->gap_start = ktime_get();
dev->gap = true;
dev->gap_duration = ev.duration;
if (!dev->send_timeout_reports)
return;
sample = LIRC_TIMEOUT(ev.duration / 1000);
IR_dprintk(2, "timeout report (duration: %d)\n", sample);
/* Normal sample */
} else {
if (dev->gap) {
dev->gap_duration += ktime_to_ns(ktime_sub(ktime_get(),
dev->gap_start));
/* Convert to ms and cap by LIRC_VALUE_MASK */
do_div(dev->gap_duration, 1000);
dev->gap_duration = min_t(u64, dev->gap_duration,
LIRC_VALUE_MASK);
kfifo_put(&dev->rawir, LIRC_SPACE(dev->gap_duration));
dev->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));
}
kfifo_put(&dev->rawir, sample);
wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM);
}
/**
* ir_lirc_scancode_event() - Send scancode data to lirc to be relayed to
* userspace
* @dev: the struct rc_dev descriptor of the device
* @lsc: the struct lirc_scancode describing the decoded scancode
*/
void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc)
{
lsc->timestamp = ktime_get_ns();
if (kfifo_put(&dev->scancodes, *lsc))
wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM);
}
EXPORT_SYMBOL_GPL(ir_lirc_scancode_event);
static int ir_lirc_open(struct inode *inode, struct file *file)
{
struct rc_dev *dev = container_of(inode->i_cdev, struct rc_dev,
lirc_cdev);
int retval;
retval = rc_open(dev);
if (retval)
return retval;
retval = mutex_lock_interruptible(&dev->lock);
if (retval)
goto out_rc;
if (!dev->registered) {
retval = -ENODEV;
goto out_unlock;
}
if (dev->lirc_open) {
retval = -EBUSY;
goto out_unlock;
}
if (dev->driver_type == RC_DRIVER_IR_RAW)
kfifo_reset_out(&dev->rawir);
if (dev->driver_type != RC_DRIVER_IR_RAW_TX)
kfifo_reset_out(&dev->scancodes);
dev->lirc_open++;
file->private_data = dev;
nonseekable_open(inode, file);
mutex_unlock(&dev->lock);
return 0;
out_unlock:
mutex_unlock(&dev->lock);
out_rc:
rc_close(dev);
return retval;
}
static int ir_lirc_close(struct inode *inode, struct file *file)
{
struct rc_dev *dev = file->private_data;
mutex_lock(&dev->lock);
dev->lirc_open--;
mutex_unlock(&dev->lock);
rc_close(dev);
return 0;
}
static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
size_t n, loff_t *ppos)
{
struct rc_dev *dev = file->private_data;
unsigned int *txbuf = NULL;
struct ir_raw_event *raw = NULL;
ssize_t ret = -EINVAL;
size_t count;
ktime_t start;
s64 towait;
unsigned int duration = 0; /* signal duration in us */
int i;
if (!dev->registered)
return -ENODEV;
start = ktime_get();
if (!dev->tx_ir) {
ret = -EINVAL;
goto out;
}
if (dev->send_mode == LIRC_MODE_SCANCODE) {
struct lirc_scancode scan;
if (n != sizeof(scan))
return -EINVAL;
if (copy_from_user(&scan, buf, sizeof(scan)))
return -EFAULT;
if (scan.flags || scan.keycode || scan.timestamp)
return -EINVAL;
/*
* The scancode field in lirc_scancode is 64-bit simply
* to future-proof it, since there are IR protocols encode
* use more than 32 bits. For now only 32-bit protocols
* are supported.
*/
if (scan.scancode > U32_MAX ||
!rc_validate_scancode(scan.rc_proto, scan.scancode))
return -EINVAL;
raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL);
if (!raw)
return -ENOMEM;
ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode,
raw, LIRCBUF_SIZE);
if (ret < 0)
goto out;
count = ret;
txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL);
if (!txbuf) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < count; i++)
/* Convert from NS to US */
txbuf[i] = DIV_ROUND_UP(raw[i].duration, 1000);
if (dev->s_tx_carrier) {
int carrier = ir_raw_encode_carrier(scan.rc_proto);
if (carrier > 0)
dev->s_tx_carrier(dev, carrier);
}
} else {
if (n < sizeof(unsigned int) || n % sizeof(unsigned int))
return -EINVAL;
count = n / sizeof(unsigned int);
if (count > LIRCBUF_SIZE || count % 2 == 0)
return -EINVAL;
txbuf = memdup_user(buf, n);
if (IS_ERR(txbuf))
return PTR_ERR(txbuf);
}
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;
if (dev->send_mode == LIRC_MODE_SCANCODE) {
ret = n;
} else {
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);
kfree(raw);
return ret;
}
static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
unsigned long arg)
{
struct rc_dev *dev = filep->private_data;
u32 __user *argp = (u32 __user *)(arg);
int ret = 0;
__u32 val = 0, tmp;
if (_IOC_DIR(cmd) & _IOC_WRITE) {
ret = get_user(val, argp);
if (ret)
return ret;
}
if (!dev->registered)
return -ENODEV;
switch (cmd) {
case LIRC_GET_FEATURES:
if (dev->driver_type == RC_DRIVER_SCANCODE)
val |= LIRC_CAN_REC_SCANCODE;
if (dev->driver_type == RC_DRIVER_IR_RAW) {
val |= LIRC_CAN_REC_MODE2 | LIRC_CAN_REC_SCANCODE;
if (dev->rx_resolution)
val |= LIRC_CAN_GET_REC_RESOLUTION;
}
if (dev->tx_ir) {
val |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE;
if (dev->s_tx_mask)
val |= LIRC_CAN_SET_TRANSMITTER_MASK;
if (dev->s_tx_carrier)
val |= LIRC_CAN_SET_SEND_CARRIER;
if (dev->s_tx_duty_cycle)
val |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
}
if (dev->s_rx_carrier_range)
val |= LIRC_CAN_SET_REC_CARRIER |
LIRC_CAN_SET_REC_CARRIER_RANGE;
if (dev->s_learning_mode)
val |= LIRC_CAN_USE_WIDEBAND_RECEIVER;
if (dev->s_carrier_report)
val |= LIRC_CAN_MEASURE_CARRIER;
if (dev->max_timeout)
val |= LIRC_CAN_SET_REC_TIMEOUT;
break;
/* mode support */
case LIRC_GET_REC_MODE:
if (dev->driver_type == RC_DRIVER_IR_RAW_TX)
return -ENOTTY;
val = dev->rec_mode;
break;
case LIRC_SET_REC_MODE:
switch (dev->driver_type) {
case RC_DRIVER_IR_RAW_TX:
return -ENOTTY;
case RC_DRIVER_SCANCODE:
if (val != LIRC_MODE_SCANCODE)
return -EINVAL;
break;
case RC_DRIVER_IR_RAW:
if (!(val == LIRC_MODE_MODE2 ||
val == LIRC_MODE_SCANCODE))
return -EINVAL;
break;
}
dev->rec_mode = val;
return 0;
case LIRC_GET_SEND_MODE:
if (!dev->tx_ir)
return -ENOTTY;
val = dev->send_mode;
break;
case LIRC_SET_SEND_MODE:
if (!dev->tx_ir)
return -ENOTTY;
if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE))
return -EINVAL;
dev->send_mode = val;
return 0;
/* TX settings */
case LIRC_SET_TRANSMITTER_MASK:
if (!dev->s_tx_mask)
return -ENOTTY;
return dev->s_tx_mask(dev, val);
case LIRC_SET_SEND_CARRIER:
if (!dev->s_tx_carrier)
return -ENOTTY;
return dev->s_tx_carrier(dev, val);
case LIRC_SET_SEND_DUTY_CYCLE:
if (!dev->s_tx_duty_cycle)
return -ENOTTY;
if (val <= 0 || val >= 100)
return -EINVAL;
return dev->s_tx_duty_cycle(dev, val);
/* RX settings */
case LIRC_SET_REC_CARRIER:
if (!dev->s_rx_carrier_range)
return -ENOTTY;
if (val <= 0)
return -EINVAL;
return dev->s_rx_carrier_range(dev,
dev->carrier_low,
val);
case LIRC_SET_REC_CARRIER_RANGE:
if (!dev->s_rx_carrier_range)
return -ENOTTY;
if (val <= 0)
return -EINVAL;
dev->carrier_low = val;
return 0;
case LIRC_GET_REC_RESOLUTION:
if (!dev->rx_resolution)
return -ENOTTY;
val = dev->rx_resolution / 1000;
break;
case LIRC_SET_WIDEBAND_RECEIVER:
if (!dev->s_learning_mode)
return -ENOTTY;
return dev->s_learning_mode(dev, !!val);
case LIRC_SET_MEASURE_CARRIER_MODE:
if (!dev->s_carrier_report)
return -ENOTTY;
return dev->s_carrier_report(dev, !!val);
/* Generic timeout support */
case LIRC_GET_MIN_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
val = DIV_ROUND_UP(dev->min_timeout, 1000);
break;
case LIRC_GET_MAX_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
val = dev->max_timeout / 1000;
break;
case LIRC_SET_REC_TIMEOUT:
if (!dev->max_timeout)
return -ENOTTY;
/* Check for multiply overflow */
if (val > U32_MAX / 1000)
return -EINVAL;
tmp = val * 1000;
if (tmp < dev->min_timeout || tmp > dev->max_timeout)
return -EINVAL;
if (dev->s_timeout)
ret = dev->s_timeout(dev, tmp);
if (!ret)
dev->timeout = tmp;
break;
case LIRC_SET_REC_TIMEOUT_REPORTS:
if (!dev->timeout)
return -ENOTTY;
dev->send_timeout_reports = !!val;
break;
default:
return -ENOTTY;
}
if (_IOC_DIR(cmd) & _IOC_READ)
ret = put_user(val, argp);
return ret;
}
static unsigned int ir_lirc_poll(struct file *file,
struct poll_table_struct *wait)
{
struct rc_dev *rcdev = file->private_data;
unsigned int events = 0;
poll_wait(file, &rcdev->wait_poll, wait);
if (!rcdev->registered) {
events = POLLHUP | POLLERR;
} else if (rcdev->driver_type != RC_DRIVER_IR_RAW_TX) {
if (rcdev->rec_mode == LIRC_MODE_SCANCODE &&
!kfifo_is_empty(&rcdev->scancodes))
events = POLLIN | POLLRDNORM;
if (rcdev->rec_mode == LIRC_MODE_MODE2 &&
!kfifo_is_empty(&rcdev->rawir))
events = POLLIN | POLLRDNORM;
}
return events;
}
static ssize_t ir_lirc_read_mode2(struct file *file, char __user *buffer,
size_t length)
{
struct rc_dev *rcdev = file->private_data;
unsigned int copied;
int ret;
if (length < sizeof(unsigned int) || length % sizeof(unsigned int))
return -EINVAL;
do {
if (kfifo_is_empty(&rcdev->rawir)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible(rcdev->wait_poll,
!kfifo_is_empty(&rcdev->rawir) ||
!rcdev->registered);
if (ret)
return ret;
}
if (!rcdev->registered)
return -ENODEV;
ret = mutex_lock_interruptible(&rcdev->lock);
if (ret)
return ret;
ret = kfifo_to_user(&rcdev->rawir, buffer, length, &copied);
mutex_unlock(&rcdev->lock);
if (ret)
return ret;
} while (copied == 0);
return copied;
}
static ssize_t ir_lirc_read_scancode(struct file *file, char __user *buffer,
size_t length)
{
struct rc_dev *rcdev = file->private_data;
unsigned int copied;
int ret;
if (length < sizeof(struct lirc_scancode) ||
length % sizeof(struct lirc_scancode))
return -EINVAL;
do {
if (kfifo_is_empty(&rcdev->scancodes)) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible(rcdev->wait_poll,
!kfifo_is_empty(&rcdev->scancodes) ||
!rcdev->registered);
if (ret)
return ret;
}
if (!rcdev->registered)
return -ENODEV;
ret = mutex_lock_interruptible(&rcdev->lock);
if (ret)
return ret;
ret = kfifo_to_user(&rcdev->scancodes, buffer, length, &copied);
mutex_unlock(&rcdev->lock);
if (ret)
return ret;
} while (copied == 0);
return copied;
}
static ssize_t ir_lirc_read(struct file *file, char __user *buffer,
size_t length, loff_t *ppos)
{
struct rc_dev *rcdev = file->private_data;
if (rcdev->driver_type == RC_DRIVER_IR_RAW_TX)
return -EINVAL;
if (!rcdev->registered)
return -ENODEV;
if (rcdev->rec_mode == LIRC_MODE_MODE2)
return ir_lirc_read_mode2(file, buffer, length);
else /* LIRC_MODE_SCANCODE */
return ir_lirc_read_scancode(file, buffer, length);
}
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 = ir_lirc_read,
.poll = ir_lirc_poll,
.open = ir_lirc_open,
.release = ir_lirc_close,
.llseek = no_llseek,
};
static void lirc_release_device(struct device *ld)
{
struct rc_dev *rcdev = container_of(ld, struct rc_dev, lirc_dev);

2
drivers/media/rc/rc-core-priv.h
View File

@ -279,8 +279,6 @@ void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev);
void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc);
int ir_lirc_register(struct rc_dev *dev);
void ir_lirc_unregister(struct rc_dev *dev);
extern const struct file_operations lirc_fops;
#else
static inline int lirc_dev_init(void) { return 0; }
static inline void lirc_dev_exit(void) {}