From 42e0442f8a237d3de9ea3f2dd2be2739e6db7fdb Mon Sep 17 00:00:00 2001 From: Sean Young Date: Thu, 2 Nov 2017 16:39:16 -0400 Subject: media: rc: move ir-lirc-codec.c contents into lirc_dev.c 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/lirc_dev.c | 604 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 604 insertions(+) (limited to 'drivers/media/rc/lirc_dev.c') diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index 2a0c48698309..97d60f0b5836 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -22,11 +22,14 @@ #include #include #include +#include +#include #include "rc-core-priv.h" #include #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); -- cgit