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authorSean Young <sean@mess.org>2017-02-25 06:51:29 -0500
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-12-14 09:58:34 -0500
commit4a0755bed173d8e9fd8272adcdb6bdc0d3dfb6ea (patch)
treef28b790548c0c948b8c14d585cb1c71292d2b4e5
parentf4373db7790771633b8d517b145646f7d672f941 (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>
-rw-r--r--drivers/media/rc/ir-lirc-codec.c99
-rw-r--r--drivers/media/rc/rc-core-priv.h2
-rw-r--r--include/media/rc-map.h54
-rw-r--r--include/uapi/linux/lirc.h82
4 files changed, 156 insertions, 81 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;
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 72197cb43781..7046734b3895 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -10,59 +10,7 @@
*/
#include <linux/input.h>
-
-/**
- * enum rc_proto - the Remote Controller protocol
- *
- * @RC_PROTO_UNKNOWN: Protocol not known
- * @RC_PROTO_OTHER: Protocol known but proprietary
- * @RC_PROTO_RC5: Philips RC5 protocol
- * @RC_PROTO_RC5X_20: Philips RC5x 20 bit protocol
- * @RC_PROTO_RC5_SZ: StreamZap variant of RC5
- * @RC_PROTO_JVC: JVC protocol
- * @RC_PROTO_SONY12: Sony 12 bit protocol
- * @RC_PROTO_SONY15: Sony 15 bit protocol
- * @RC_PROTO_SONY20: Sony 20 bit protocol
- * @RC_PROTO_NEC: NEC protocol
- * @RC_PROTO_NECX: Extended NEC protocol
- * @RC_PROTO_NEC32: NEC 32 bit protocol
- * @RC_PROTO_SANYO: Sanyo protocol
- * @RC_PROTO_MCIR2_KBD: RC6-ish MCE keyboard
- * @RC_PROTO_MCIR2_MSE: RC6-ish MCE mouse
- * @RC_PROTO_RC6_0: Philips RC6-0-16 protocol
- * @RC_PROTO_RC6_6A_20: Philips RC6-6A-20 protocol
- * @RC_PROTO_RC6_6A_24: Philips RC6-6A-24 protocol
- * @RC_PROTO_RC6_6A_32: Philips RC6-6A-32 protocol
- * @RC_PROTO_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
- * @RC_PROTO_SHARP: Sharp protocol
- * @RC_PROTO_XMP: XMP protocol
- * @RC_PROTO_CEC: CEC protocol
- */
-enum rc_proto {
- RC_PROTO_UNKNOWN = 0,
- RC_PROTO_OTHER = 1,
- RC_PROTO_RC5 = 2,
- RC_PROTO_RC5X_20 = 3,
- RC_PROTO_RC5_SZ = 4,
- RC_PROTO_JVC = 5,
- RC_PROTO_SONY12 = 6,
- RC_PROTO_SONY15 = 7,
- RC_PROTO_SONY20 = 8,
- RC_PROTO_NEC = 9,
- RC_PROTO_NECX = 10,
- RC_PROTO_NEC32 = 11,
- RC_PROTO_SANYO = 12,
- RC_PROTO_MCIR2_KBD = 13,
- RC_PROTO_MCIR2_MSE = 14,
- RC_PROTO_RC6_0 = 15,
- RC_PROTO_RC6_6A_20 = 16,
- RC_PROTO_RC6_6A_24 = 17,
- RC_PROTO_RC6_6A_32 = 18,
- RC_PROTO_RC6_MCE = 19,
- RC_PROTO_SHARP = 20,
- RC_PROTO_XMP = 21,
- RC_PROTO_CEC = 22,
-};
+#include <uapi/linux/lirc.h>
#define RC_PROTO_BIT_NONE 0ULL
#define RC_PROTO_BIT_UNKNOWN BIT_ULL(RC_PROTO_UNKNOWN)
diff --git a/include/uapi/linux/lirc.h b/include/uapi/linux/lirc.h
index c3aef4316fbf..4fe580d36e41 100644
--- a/include/uapi/linux/lirc.h
+++ b/include/uapi/linux/lirc.h
@@ -47,12 +47,14 @@
#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
@@ -64,6 +66,7 @@
#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)
@@ -131,4 +134,83 @@
#define LIRC_SET_WIDEBAND_RECEIVER _IOW('i', 0x00000023, __u32)
+/*
+ * struct lirc_scancode - decoded scancode with protocol for use with
+ * LIRC_MODE_SCANCODE
+ *
+ * @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_proto: see enum rc_proto
+ * @keycode: the translated keycode. Set to 0 for transmit.
+ * @scancode: the scancode received or to be sent
+ */
+struct lirc_scancode {
+ __u64 timestamp;
+ __u16 flags;
+ __u16 rc_proto;
+ __u32 keycode;
+ __u64 scancode;
+};
+
+/* Set if the toggle bit of rc-5 or rc-6 is enabled */
+#define LIRC_SCANCODE_FLAG_TOGGLE 1
+/* Set if this is a nec or sanyo repeat */
+#define LIRC_SCANCODE_FLAG_REPEAT 2
+
+/**
+ * enum rc_proto - the Remote Controller protocol
+ *
+ * @RC_PROTO_UNKNOWN: Protocol not known
+ * @RC_PROTO_OTHER: Protocol known but proprietary
+ * @RC_PROTO_RC5: Philips RC5 protocol
+ * @RC_PROTO_RC5X_20: Philips RC5x 20 bit protocol
+ * @RC_PROTO_RC5_SZ: StreamZap variant of RC5
+ * @RC_PROTO_JVC: JVC protocol
+ * @RC_PROTO_SONY12: Sony 12 bit protocol
+ * @RC_PROTO_SONY15: Sony 15 bit protocol
+ * @RC_PROTO_SONY20: Sony 20 bit protocol
+ * @RC_PROTO_NEC: NEC protocol
+ * @RC_PROTO_NECX: Extended NEC protocol
+ * @RC_PROTO_NEC32: NEC 32 bit protocol
+ * @RC_PROTO_SANYO: Sanyo protocol
+ * @RC_PROTO_MCIR2_KBD: RC6-ish MCE keyboard
+ * @RC_PROTO_MCIR2_MSE: RC6-ish MCE mouse
+ * @RC_PROTO_RC6_0: Philips RC6-0-16 protocol
+ * @RC_PROTO_RC6_6A_20: Philips RC6-6A-20 protocol
+ * @RC_PROTO_RC6_6A_24: Philips RC6-6A-24 protocol
+ * @RC_PROTO_RC6_6A_32: Philips RC6-6A-32 protocol
+ * @RC_PROTO_RC6_MCE: MCE (Philips RC6-6A-32 subtype) protocol
+ * @RC_PROTO_SHARP: Sharp protocol
+ * @RC_PROTO_XMP: XMP protocol
+ * @RC_PROTO_CEC: CEC protocol
+ */
+enum rc_proto {
+ RC_PROTO_UNKNOWN = 0,
+ RC_PROTO_OTHER = 1,
+ RC_PROTO_RC5 = 2,
+ RC_PROTO_RC5X_20 = 3,
+ RC_PROTO_RC5_SZ = 4,
+ RC_PROTO_JVC = 5,
+ RC_PROTO_SONY12 = 6,
+ RC_PROTO_SONY15 = 7,
+ RC_PROTO_SONY20 = 8,
+ RC_PROTO_NEC = 9,
+ RC_PROTO_NECX = 10,
+ RC_PROTO_NEC32 = 11,
+ RC_PROTO_SANYO = 12,
+ RC_PROTO_MCIR2_KBD = 13,
+ RC_PROTO_MCIR2_MSE = 14,
+ RC_PROTO_RC6_0 = 15,
+ RC_PROTO_RC6_6A_20 = 16,
+ RC_PROTO_RC6_6A_24 = 17,
+ RC_PROTO_RC6_6A_32 = 18,
+ RC_PROTO_RC6_MCE = 19,
+ RC_PROTO_SHARP = 20,
+ RC_PROTO_XMP = 21,
+ RC_PROTO_CEC = 22,
+};
+
#endif

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