forked from Minki/linux
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>
This commit is contained in:
Sean Young
Mauro Carvalho Chehab
parent
4e3cd001fd
commit
9b6192589b
@ -107,7 +107,8 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
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{
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struct lirc_codec *lirc;
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struct rc_dev *dev;
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unsigned int *txbuf; /* buffer with values to transmit */
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unsigned int *txbuf = NULL;
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struct ir_raw_event *raw = NULL;
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ssize_t ret = -EINVAL;
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size_t count;
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ktime_t start;
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@ -121,16 +122,50 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
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if (!lirc)
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return -EFAULT;
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if (n < sizeof(unsigned) || n % sizeof(unsigned))
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return -EINVAL;
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if (lirc->send_mode == LIRC_MODE_SCANCODE) {
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struct lirc_scancode scan;
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count = n / sizeof(unsigned);
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if (count > LIRCBUF_SIZE || count % 2 == 0)
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return -EINVAL;
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if (n != sizeof(scan))
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return -EINVAL;
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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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if (copy_from_user(&scan, buf, sizeof(scan)))
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return -EFAULT;
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if (scan.flags || scan.keycode || scan.timestamp)
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return -EINVAL;
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raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL);
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if (!raw)
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return -ENOMEM;
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ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode,
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raw, LIRCBUF_SIZE);
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if (ret < 0)
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goto out;
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count = ret;
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txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL);
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if (!txbuf) {
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ret = -ENOMEM;
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goto out;
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}
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for (i = 0; i < count; i++)
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/* Convert from NS to US */
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txbuf[i] = DIV_ROUND_UP(raw[i].duration, 1000);
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} else {
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if (n < sizeof(unsigned int) || n % sizeof(unsigned int))
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return -EINVAL;
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count = n / sizeof(unsigned int);
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if (count > LIRCBUF_SIZE || count % 2 == 0)
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return -EINVAL;
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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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}
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dev = lirc->dev;
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if (!dev) {
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@ -156,24 +191,30 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
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if (ret < 0)
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goto out;
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for (duration = i = 0; i < ret; i++)
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duration += txbuf[i];
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if (lirc->send_mode == LIRC_MODE_SCANCODE) {
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ret = n;
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} else {
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for (duration = i = 0; i < ret; i++)
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duration += txbuf[i];
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ret *= sizeof(unsigned int);
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ret *= sizeof(unsigned int);
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/*
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* The lircd gap calculation expects the write function to
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* wait for the actual IR signal to be transmitted before
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* returning.
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*/
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towait = ktime_us_delta(ktime_add_us(start, duration), ktime_get());
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if (towait > 0) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout(usecs_to_jiffies(towait));
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/*
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* The lircd gap calculation expects the write function to
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* wait for the actual IR signal to be transmitted before
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* returning.
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*/
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towait = ktime_us_delta(ktime_add_us(start, duration),
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ktime_get());
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if (towait > 0) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout(usecs_to_jiffies(towait));
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}
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}
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out:
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kfree(txbuf);
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kfree(raw);
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return ret;
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}
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@ -202,20 +243,22 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
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switch (cmd) {
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/* legacy support */
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/* mode support */
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case LIRC_GET_SEND_MODE:
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if (!dev->tx_ir)
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return -ENOTTY;
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val = LIRC_MODE_PULSE;
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val = lirc->send_mode;
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break;
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case LIRC_SET_SEND_MODE:
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if (!dev->tx_ir)
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return -ENOTTY;
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if (val != LIRC_MODE_PULSE)
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if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE))
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return -EINVAL;
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lirc->send_mode = val;
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return 0;
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/* TX settings */
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@ -361,7 +404,7 @@ static int ir_lirc_register(struct rc_dev *dev)
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}
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if (dev->tx_ir) {
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features |= LIRC_CAN_SEND_PULSE;
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features |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE;
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if (dev->s_tx_mask)
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features |= LIRC_CAN_SET_TRANSMITTER_MASK;
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if (dev->s_tx_carrier)
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@ -399,6 +442,8 @@ static int ir_lirc_register(struct rc_dev *dev)
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if (rc < 0)
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goto out;
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dev->raw->lirc.send_mode = LIRC_MODE_PULSE;
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dev->raw->lirc.ldev = ldev;
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dev->raw->lirc.dev = dev;
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return 0;
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@ -103,7 +103,7 @@ struct ir_raw_event_ctrl {
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u64 gap_duration;
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bool gap;
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bool send_timeout_reports;
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u8 send_mode;
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} lirc;
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struct xmp_dec {
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int state;
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@ -10,59 +10,7 @@
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*/
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#include <linux/input.h>
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/**
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* enum rc_proto - the Remote Controller protocol
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*
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* @RC_PROTO_UNKNOWN: Protocol not known
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* @RC_PROTO_OTHER: Protocol known but proprietary
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* @RC_PROTO_RC5: Philips RC5 protocol
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* @RC_PROTO_RC5X_20: Philips RC5x 20 bit protocol
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* @RC_PROTO_RC5_SZ: StreamZap variant of RC5
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* @RC_PROTO_JVC: JVC protocol
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* @RC_PROTO_SONY12: Sony 12 bit protocol
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* @RC_PROTO_SONY15: Sony 15 bit protocol
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* @RC_PROTO_SONY20: Sony 20 bit protocol
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* @RC_PROTO_NEC: NEC protocol
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* @RC_PROTO_NECX: Extended NEC protocol
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* @RC_PROTO_NEC32: NEC 32 bit protocol
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* @RC_PROTO_SANYO: Sanyo protocol
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* @RC_PROTO_MCIR2_KBD: RC6-ish MCE keyboard
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* @RC_PROTO_MCIR2_MSE: RC6-ish MCE mouse
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* @RC_PROTO_RC6_0: Philips RC6-0-16 protocol
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* @RC_PROTO_RC6_6A_20: Philips RC6-6A-20 protocol
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* @RC_PROTO_RC6_6A_24: Philips RC6-6A-24 protocol
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* @RC_PROTO_RC6_6A_32: Philips RC6-6A-32 protocol
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* @RC_PROTO_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
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* @RC_PROTO_SHARP: Sharp protocol
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* @RC_PROTO_XMP: XMP protocol
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* @RC_PROTO_CEC: CEC protocol
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*/
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enum rc_proto {
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RC_PROTO_UNKNOWN = 0,
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RC_PROTO_OTHER = 1,
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RC_PROTO_RC5 = 2,
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RC_PROTO_RC5X_20 = 3,
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RC_PROTO_RC5_SZ = 4,
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RC_PROTO_JVC = 5,
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RC_PROTO_SONY12 = 6,
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RC_PROTO_SONY15 = 7,
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RC_PROTO_SONY20 = 8,
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RC_PROTO_NEC = 9,
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RC_PROTO_NECX = 10,
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RC_PROTO_NEC32 = 11,
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RC_PROTO_SANYO = 12,
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RC_PROTO_MCIR2_KBD = 13,
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RC_PROTO_MCIR2_MSE = 14,
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RC_PROTO_RC6_0 = 15,
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RC_PROTO_RC6_6A_20 = 16,
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RC_PROTO_RC6_6A_24 = 17,
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RC_PROTO_RC6_6A_32 = 18,
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RC_PROTO_RC6_MCE = 19,
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RC_PROTO_SHARP = 20,
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RC_PROTO_XMP = 21,
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RC_PROTO_CEC = 22,
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};
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#include <uapi/linux/lirc.h>
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#define RC_PROTO_BIT_NONE 0ULL
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#define RC_PROTO_BIT_UNKNOWN BIT_ULL(RC_PROTO_UNKNOWN)
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@ -47,12 +47,14 @@
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#define LIRC_MODE_RAW 0x00000001
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#define LIRC_MODE_PULSE 0x00000002
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#define LIRC_MODE_MODE2 0x00000004
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#define LIRC_MODE_SCANCODE 0x00000008
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#define LIRC_MODE_LIRCCODE 0x00000010
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#define LIRC_CAN_SEND_RAW LIRC_MODE2SEND(LIRC_MODE_RAW)
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#define LIRC_CAN_SEND_PULSE LIRC_MODE2SEND(LIRC_MODE_PULSE)
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#define LIRC_CAN_SEND_MODE2 LIRC_MODE2SEND(LIRC_MODE_MODE2)
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#define LIRC_CAN_SEND_SCANCODE LIRC_MODE2SEND(LIRC_MODE_SCANCODE)
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#define LIRC_CAN_SEND_LIRCCODE LIRC_MODE2SEND(LIRC_MODE_LIRCCODE)
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#define LIRC_CAN_SEND_MASK 0x0000003f
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@ -64,6 +66,7 @@
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#define LIRC_CAN_REC_RAW LIRC_MODE2REC(LIRC_MODE_RAW)
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#define LIRC_CAN_REC_PULSE LIRC_MODE2REC(LIRC_MODE_PULSE)
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#define LIRC_CAN_REC_MODE2 LIRC_MODE2REC(LIRC_MODE_MODE2)
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#define LIRC_CAN_REC_SCANCODE LIRC_MODE2REC(LIRC_MODE_SCANCODE)
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#define LIRC_CAN_REC_LIRCCODE LIRC_MODE2REC(LIRC_MODE_LIRCCODE)
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#define LIRC_CAN_REC_MASK LIRC_MODE2REC(LIRC_CAN_SEND_MASK)
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@ -131,4 +134,83 @@
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#define LIRC_SET_WIDEBAND_RECEIVER _IOW('i', 0x00000023, __u32)
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/*
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* struct lirc_scancode - decoded scancode with protocol for use with
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* LIRC_MODE_SCANCODE
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*
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* @timestamp: Timestamp in nanoseconds using CLOCK_MONOTONIC when IR
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* was decoded.
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* @flags: should be 0 for transmit. When receiving scancodes,
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* LIRC_SCANCODE_FLAG_TOGGLE or LIRC_SCANCODE_FLAG_REPEAT can be set
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* depending on the protocol
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* @rc_proto: see enum rc_proto
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* @keycode: the translated keycode. Set to 0 for transmit.
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* @scancode: the scancode received or to be sent
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*/
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struct lirc_scancode {
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__u64 timestamp;
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__u16 flags;
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__u16 rc_proto;
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__u32 keycode;
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__u64 scancode;
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};
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/* Set if the toggle bit of rc-5 or rc-6 is enabled */
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#define LIRC_SCANCODE_FLAG_TOGGLE 1
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/* Set if this is a nec or sanyo repeat */
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#define LIRC_SCANCODE_FLAG_REPEAT 2
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/**
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* enum rc_proto - the Remote Controller protocol
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*
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* @RC_PROTO_UNKNOWN: Protocol not known
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* @RC_PROTO_OTHER: Protocol known but proprietary
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* @RC_PROTO_RC5: Philips RC5 protocol
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* @RC_PROTO_RC5X_20: Philips RC5x 20 bit protocol
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* @RC_PROTO_RC5_SZ: StreamZap variant of RC5
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* @RC_PROTO_JVC: JVC protocol
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* @RC_PROTO_SONY12: Sony 12 bit protocol
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* @RC_PROTO_SONY15: Sony 15 bit protocol
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* @RC_PROTO_SONY20: Sony 20 bit protocol
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* @RC_PROTO_NEC: NEC protocol
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* @RC_PROTO_NECX: Extended NEC protocol
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* @RC_PROTO_NEC32: NEC 32 bit protocol
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* @RC_PROTO_SANYO: Sanyo protocol
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* @RC_PROTO_MCIR2_KBD: RC6-ish MCE keyboard
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* @RC_PROTO_MCIR2_MSE: RC6-ish MCE mouse
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* @RC_PROTO_RC6_0: Philips RC6-0-16 protocol
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* @RC_PROTO_RC6_6A_20: Philips RC6-6A-20 protocol
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* @RC_PROTO_RC6_6A_24: Philips RC6-6A-24 protocol
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* @RC_PROTO_RC6_6A_32: Philips RC6-6A-32 protocol
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* @RC_PROTO_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
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* @RC_PROTO_SHARP: Sharp protocol
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* @RC_PROTO_XMP: XMP protocol
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* @RC_PROTO_CEC: CEC protocol
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*/
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enum rc_proto {
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RC_PROTO_UNKNOWN = 0,
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RC_PROTO_OTHER = 1,
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RC_PROTO_RC5 = 2,
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RC_PROTO_RC5X_20 = 3,
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RC_PROTO_RC5_SZ = 4,
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RC_PROTO_JVC = 5,
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RC_PROTO_SONY12 = 6,
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RC_PROTO_SONY15 = 7,
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RC_PROTO_SONY20 = 8,
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RC_PROTO_NEC = 9,
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RC_PROTO_NECX = 10,
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RC_PROTO_NEC32 = 11,
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RC_PROTO_SANYO = 12,
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RC_PROTO_MCIR2_KBD = 13,
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RC_PROTO_MCIR2_MSE = 14,
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RC_PROTO_RC6_0 = 15,
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RC_PROTO_RC6_6A_20 = 16,
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RC_PROTO_RC6_6A_24 = 17,
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RC_PROTO_RC6_6A_32 = 18,
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RC_PROTO_RC6_MCE = 19,
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RC_PROTO_SHARP = 20,
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RC_PROTO_XMP = 21,
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RC_PROTO_CEC = 22,
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};
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#endif
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