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
+++ /dev/null
-/* 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,
-};
#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;
/* 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);
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) {}
projects / openwrt / staging / blogic.git / commitdiff