diff options
author | Sean Young <sean@mess.org> | 2017-02-25 06:51:29 -0500 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-12-14 10:35:15 -0500 |
commit | 9b6192589be788dec73a0e99fe49b8f8ddaf825e (patch) | |
tree | 0f2482fc765d53e274c58c2d0000168eaa493559 /drivers | |
parent | 4e3cd001fde13dfd4a91888f908b2a07fd0a4047 (diff) |
media: lirc: implement scancode sending
This introduces a new lirc mode: scancode. Any device which can send raw IR
can now also send scancodes.
int main()
{
int mode, fd = open("/dev/lirc0", O_RDWR);
mode = LIRC_MODE_SCANCODE;
if (ioctl(fd, LIRC_SET_SEND_MODE, &mode)) {
// kernel too old or lirc does not support transmit
}
struct lirc_scancode scancode = {
.scancode = 0x1e3d,
.rc_proto = RC_PROTO_RC5,
};
write(fd, &scancode, sizeof(scancode));
close(fd);
}
The other fields of lirc_scancode must be set to 0.
Note that toggle (rc5, rc6) and repeats (nec) are not implemented. Nor is
there a method for holding down a key for a period.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/rc/ir-lirc-codec.c | 99 | ||||
-rw-r--r-- | drivers/media/rc/rc-core-priv.h | 2 |
2 files changed, 73 insertions, 28 deletions
diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c index 9954ad4b8e59..0a3ec693d290 100644 --- a/drivers/media/rc/ir-lirc-codec.c +++ b/drivers/media/rc/ir-lirc-codec.c @@ -107,7 +107,8 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf, { struct lirc_codec *lirc; struct rc_dev *dev; - unsigned int *txbuf; /* buffer with values to transmit */ + unsigned int *txbuf = NULL; + struct ir_raw_event *raw = NULL; ssize_t ret = -EINVAL; size_t count; ktime_t start; @@ -121,16 +122,50 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf, if (!lirc) return -EFAULT; - if (n < sizeof(unsigned) || n % sizeof(unsigned)) - return -EINVAL; + if (lirc->send_mode == LIRC_MODE_SCANCODE) { + struct lirc_scancode scan; - count = n / sizeof(unsigned); - if (count > LIRCBUF_SIZE || count % 2 == 0) - return -EINVAL; + if (n != sizeof(scan)) + return -EINVAL; - txbuf = memdup_user(buf, n); - if (IS_ERR(txbuf)) - return PTR_ERR(txbuf); + if (copy_from_user(&scan, buf, sizeof(scan))) + return -EFAULT; + + if (scan.flags || scan.keycode || scan.timestamp) + 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); + } 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); + } dev = lirc->dev; if (!dev) { @@ -156,24 +191,30 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf, if (ret < 0) goto out; - 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)); + if (lirc->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; } @@ -202,20 +243,22 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, switch (cmd) { - /* legacy support */ + /* mode support */ case LIRC_GET_SEND_MODE: if (!dev->tx_ir) return -ENOTTY; - val = LIRC_MODE_PULSE; + val = lirc->send_mode; break; case LIRC_SET_SEND_MODE: if (!dev->tx_ir) return -ENOTTY; - if (val != LIRC_MODE_PULSE) + if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE)) return -EINVAL; + + lirc->send_mode = val; return 0; /* TX settings */ @@ -361,7 +404,7 @@ static int ir_lirc_register(struct rc_dev *dev) } if (dev->tx_ir) { - features |= LIRC_CAN_SEND_PULSE; + features |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE; if (dev->s_tx_mask) features |= LIRC_CAN_SET_TRANSMITTER_MASK; if (dev->s_tx_carrier) @@ -399,6 +442,8 @@ static int ir_lirc_register(struct rc_dev *dev) if (rc < 0) goto out; + dev->raw->lirc.send_mode = LIRC_MODE_PULSE; + dev->raw->lirc.ldev = ldev; dev->raw->lirc.dev = dev; return 0; diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 564d6e13585e..d10fc998e1db 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -103,7 +103,7 @@ struct ir_raw_event_ctrl { u64 gap_duration; bool gap; bool send_timeout_reports; - + u8 send_mode; } lirc; struct xmp_dec { int state; |