This introduces a new lirc mode: scancode. Any device which can send raw IR
can also send scancodes.
int main()
{
int fd, mode, rc;
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_type = RC_TYPE_RC5,
.flags = 0,
.timestamp = 0
};
write(fd, &scancode, sizeof(scancode));
close(fd);
}
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@xxxxxxxx>
---
drivers/media/rc/ir-lirc-codec.c | 64 ++++++++++++++++++++++++++-------
drivers/media/rc/rc-core-priv.h | 1 +
include/media/rc-map.h | 54 +---------------------------
include/uapi/linux/lirc.h | 76 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 130 insertions(+), 65 deletions(-)
diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c
index 74f7863..85f333d 100644
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -91,6 +91,7 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
struct lirc_node *lirc;
struct rc_dev *dev;
unsigned int *txbuf; /* buffer with values to transmit */
+ struct ir_raw_event *raw = NULL;
ssize_t ret = -EINVAL;
size_t count;
ktime_t start;
@@ -104,16 +105,49 @@ 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;
+
+ if (copy_from_user(&scan, buf, sizeof(scan)))
+ return -EFAULT;
+
+ if (scan.flags || scan.timestamp)
+ return -EINVAL;
+
+ raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL);
+ if (!raw)
+ return -ENOMEM;
+
+ ret = ir_raw_encode_scancode(scan.rc_type, scan.scancode,
+ raw, LIRCBUF_SIZE);
+ if (ret < 0)
+ goto out;
+
+ count = ret;
- txbuf = memdup_user(buf, n);
- if (IS_ERR(txbuf))
- return PTR_ERR(txbuf);
+ txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL);
+ if (!txbuf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < count; i++)
+ 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) {
@@ -142,7 +176,10 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
for (duration = i = 0; i < ret; i++)
duration += txbuf[i];
- ret *= sizeof(unsigned int);
+ if (lirc->send_mode == LIRC_MODE_SCANCODE)
+ ret = n;
+ else
+ ret *= sizeof(unsigned int);
/*
* The lircd gap calculation expects the write function to
@@ -157,6 +194,7 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
out:
kfree(txbuf);
+ kfree(raw);
return ret;
}
@@ -190,15 +228,17 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
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 */
@@ -407,7 +447,7 @@ int ir_lirc_register(struct rc_dev *dev)
features |= LIRC_CAN_GET_REC_RESOLUTION;
}
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)
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index 9b561c3..6944d54 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -49,6 +49,7 @@ struct lirc_node {
u64 gap_duration;
bool gap;
bool send_timeout_reports;
+ int send_mode;
};
struct ir_raw_event_ctrl {
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 1a815a5..1880f47 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -10,59 +10,7 @@
*/
#include <linux/input.h>
-
-/**
- * enum rc_type - type of the Remote Controller protocol
- *
- * @RC_TYPE_UNKNOWN: Protocol not known
- * @RC_TYPE_OTHER: Protocol known but proprietary
- * @RC_TYPE_RC5: Philips RC5 protocol
- * @RC_TYPE_RC5X_20: Philips RC5x 20 bit protocol
- * @RC_TYPE_RC5_SZ: StreamZap variant of RC5
- * @RC_TYPE_JVC: JVC protocol
- * @RC_TYPE_SONY12: Sony 12 bit protocol
- * @RC_TYPE_SONY15: Sony 15 bit protocol
- * @RC_TYPE_SONY20: Sony 20 bit protocol
- * @RC_TYPE_NEC: NEC protocol
- * @RC_TYPE_NECX: Extended NEC protocol
- * @RC_TYPE_NEC32: NEC 32 bit protocol
- * @RC_TYPE_SANYO: Sanyo protocol
- * @RC_TYPE_MCIR2_KBD: RC6-ish MCE keyboard
- * @RC_TYPE_MCIR2_MSE: RC6-ish MCE mouse
- * @RC_TYPE_RC6_0: Philips RC6-0-16 protocol
- * @RC_TYPE_RC6_6A_20: Philips RC6-6A-20 protocol
- * @RC_TYPE_RC6_6A_24: Philips RC6-6A-24 protocol
- * @RC_TYPE_RC6_6A_32: Philips RC6-6A-32 protocol
- * @RC_TYPE_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
- * @RC_TYPE_SHARP: Sharp protocol
- * @RC_TYPE_XMP: XMP protocol
- * @RC_TYPE_CEC: CEC protocol
- */
-enum rc_type {
- RC_TYPE_UNKNOWN = 0,
- RC_TYPE_OTHER = 1,
- RC_TYPE_RC5 = 2,
- RC_TYPE_RC5X_20 = 3,
- RC_TYPE_RC5_SZ = 4,
- RC_TYPE_JVC = 5,
- RC_TYPE_SONY12 = 6,
- RC_TYPE_SONY15 = 7,
- RC_TYPE_SONY20 = 8,
- RC_TYPE_NEC = 9,
- RC_TYPE_NECX = 10,
- RC_TYPE_NEC32 = 11,
- RC_TYPE_SANYO = 12,
- RC_TYPE_MCIR2_KBD = 13,
- RC_TYPE_MCIR2_MSE = 14,
- RC_TYPE_RC6_0 = 15,
- RC_TYPE_RC6_6A_20 = 16,
- RC_TYPE_RC6_6A_24 = 17,
- RC_TYPE_RC6_6A_32 = 18,
- RC_TYPE_RC6_MCE = 19,
- RC_TYPE_SHARP = 20,
- RC_TYPE_XMP = 21,
- RC_TYPE_CEC = 22,
-};
+#include <linux/lirc.h>
#define RC_BIT_NONE 0ULL
#define RC_BIT_UNKNOWN BIT_ULL(RC_TYPE_UNKNOWN)
diff --git a/include/uapi/linux/lirc.h b/include/uapi/linux/lirc.h
index 991ab45..d04fc62 100644
--- a/include/uapi/linux/lirc.h
+++ b/include/uapi/linux/lirc.h
@@ -46,12 +46,14 @@
#define LIRC_MODE_RAW 0x00000001
#define LIRC_MODE_PULSE 0x00000002
#define LIRC_MODE_MODE2 0x00000004
+#define LIRC_MODE_SCANCODE 0x00000008
#define LIRC_MODE_LIRCCODE 0x00000010
#define LIRC_CAN_SEND_RAW LIRC_MODE2SEND(LIRC_MODE_RAW)
#define LIRC_CAN_SEND_PULSE LIRC_MODE2SEND(LIRC_MODE_PULSE)
#define LIRC_CAN_SEND_MODE2 LIRC_MODE2SEND(LIRC_MODE_MODE2)
+#define LIRC_CAN_SEND_SCANCODE LIRC_MODE2SEND(LIRC_MODE_SCANCODE)
#define LIRC_CAN_SEND_LIRCCODE LIRC_MODE2SEND(LIRC_MODE_LIRCCODE)
#define LIRC_CAN_SEND_MASK 0x0000003f
@@ -63,6 +65,7 @@
#define LIRC_CAN_REC_RAW LIRC_MODE2REC(LIRC_MODE_RAW)
#define LIRC_CAN_REC_PULSE LIRC_MODE2REC(LIRC_MODE_PULSE)
#define LIRC_CAN_REC_MODE2 LIRC_MODE2REC(LIRC_MODE_MODE2)
+#define LIRC_CAN_REC_SCANCODE LIRC_MODE2REC(LIRC_MODE_SCANCODE)
#define LIRC_CAN_REC_LIRCCODE LIRC_MODE2REC(LIRC_MODE_LIRCCODE)
#define LIRC_CAN_REC_MASK LIRC_MODE2REC(LIRC_CAN_SEND_MASK)
@@ -130,4 +133,77 @@
#define LIRC_SET_WIDEBAND_RECEIVER _IOW('i', 0x00000023, __u32)
+/*
+ * struct lirc_scancode - decoded scancodes with protocol
+ * @timestamp: Timestamp in nanoseconds using CLOCK_MONOTONIC when IR
+ * was decoded.
+ * @flags: should be 0 for transmit. When receiving scancodes,
+ * LIRC_SCANCODE_FLAG_TOGGLE or LIRC_SCANCODE_FLAG_REPEAT can be set
+ * depending on the protocol
+ * @rc_type: see enum rc_type
+ * @scancode: the scancode received or to be sent
+ */
+struct lirc_scancode {
+ __u64 timestamp;
+ __u32 flags;
+ __u32 rc_type;
+ __u64 scancode;
+};
+
+#define LIRC_SCANCODE_FLAG_TOGGLE 1
+#define LIRC_SCANCODE_FLAG_REPEAT 2
+
+/**
+ * enum rc_type - type of the Remote Controller protocol
+ *
+ * @RC_TYPE_UNKNOWN: Protocol not known
+ * @RC_TYPE_OTHER: Protocol known but proprietary
+ * @RC_TYPE_RC5: Philips RC5 protocol
+ * @RC_TYPE_RC5X_20: Philips RC5x 20 bit protocol
+ * @RC_TYPE_RC5_SZ: StreamZap variant of RC5
+ * @RC_TYPE_JVC: JVC protocol
+ * @RC_TYPE_SONY12: Sony 12 bit protocol
+ * @RC_TYPE_SONY15: Sony 15 bit protocol
+ * @RC_TYPE_SONY20: Sony 20 bit protocol
+ * @RC_TYPE_NEC: NEC protocol
+ * @RC_TYPE_NECX: Extended NEC protocol
+ * @RC_TYPE_NEC32: NEC 32 bit protocol
+ * @RC_TYPE_SANYO: Sanyo protocol
+ * @RC_TYPE_MCIR2_KBD: RC6-ish MCE keyboard
+ * @RC_TYPE_MCIR2_MSE: RC6-ish MCE mouse
+ * @RC_TYPE_RC6_0: Philips RC6-0-16 protocol
+ * @RC_TYPE_RC6_6A_20: Philips RC6-6A-20 protocol
+ * @RC_TYPE_RC6_6A_24: Philips RC6-6A-24 protocol
+ * @RC_TYPE_RC6_6A_32: Philips RC6-6A-32 protocol
+ * @RC_TYPE_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
+ * @RC_TYPE_SHARP: Sharp protocol
+ * @RC_TYPE_XMP: XMP protocol
+ * @RC_TYPE_CEC: CEC protocol
+ */
+enum rc_type {
+ RC_TYPE_UNKNOWN = 0,
+ RC_TYPE_OTHER = 1,
+ RC_TYPE_RC5 = 2,
+ RC_TYPE_RC5X_20 = 3,
+ RC_TYPE_RC5_SZ = 4,
+ RC_TYPE_JVC = 5,
+ RC_TYPE_SONY12 = 6,
+ RC_TYPE_SONY15 = 7,
+ RC_TYPE_SONY20 = 8,
+ RC_TYPE_NEC = 9,
+ RC_TYPE_NECX = 10,
+ RC_TYPE_NEC32 = 11,
+ RC_TYPE_SANYO = 12,
+ RC_TYPE_MCIR2_KBD = 13,
+ RC_TYPE_MCIR2_MSE = 14,
+ RC_TYPE_RC6_0 = 15,
+ RC_TYPE_RC6_6A_20 = 16,
+ RC_TYPE_RC6_6A_24 = 17,
+ RC_TYPE_RC6_6A_32 = 18,
+ RC_TYPE_RC6_MCE = 19,
+ RC_TYPE_SHARP = 20,
+ RC_TYPE_XMP = 21,
+ RC_TYPE_CEC = 22,
+};
+
#endif
--
2.9.3
