The send mode has to be switched to LIRC_MODE_SCANCODE and then you can
send one scancode with a write. The encoding is the same as for receiving
scancodes.
FIXME: Currently only the nec encoder can encode IR.
FIXME: The "decoders" should be renamed (codec?)
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
.../DocBook/media/v4l/lirc_device_interface.xml | 39 +++++++++--------
drivers/media/rc/ir-lirc-codec.c | 49 +++++++++++++++------
drivers/media/rc/ir-nec-decoder.c | 50 ++++++++++++++++++++++
drivers/media/rc/rc-core-priv.h | 1 +
drivers/media/rc/rc-ir-raw.c | 19 ++++++++
include/media/lirc.h | 1 +
include/media/rc-core.h | 3 +-
7 files changed, 132 insertions(+), 30 deletions(-)
diff --git a/Documentation/DocBook/media/v4l/lirc_device_interface.xml b/Documentation/DocBook/media/v4l/lirc_device_interface.xml
index f92b5a5..e7f8139 100644
--- a/Documentation/DocBook/media/v4l/lirc_device_interface.xml
+++ b/Documentation/DocBook/media/v4l/lirc_device_interface.xml
@@ -37,8 +37,8 @@ The lower 24 bits signify the value either in Hertz or nanoseconds.
</para>
<para>If LIRC_MODE_SCANCODE is enabled then the type in the highest 8 bits
is LIRC_MODE2_SCANCODE. The 24 bit signifies a repeat, 23 bit toggle set and
-the lowest 8 bits is the rc protocol (see rc_type in rc-core.h). The next full
-unsigned int is the scancode; there is no type in the highest 8 bits.
+the lowest 8 bits is the rc protocol (see enum rc_type in rc-map.h). The next
+full unsigned int is the scancode; there is no type in the highest 8 bits.
</para>
<para>The mode can be set and get using <xref linkend="lirc_ioctl"/>. </para>
@@ -47,13 +47,24 @@ unsigned int is the scancode; there is no type in the highest 8 bits.
<section id="lirc_write">
<title>LIRC write fop</title>
-<para>The data written to the chardev is a pulse/space sequence of integer
-values. Pulses and spaces are only marked implicitly by their position. The
-data must start and end with a pulse, therefore, the data must always include
-an uneven number of samples. The write function must block until the data has
-been transmitted by the hardware. If more data is provided than the hardware
-can send, the driver returns EINVAL.</para>
+<para>
+This is for sending or "blasting" IR. The format depends on the send mode,
+this is either LIRC_MODE_PULSE or LIRC_MODE_SCANCODE. The mode can be set
+and get using <xref linkend="lirc_ioctl"/>. </para>
+</para>
+<para>In LIRC_MODE_PULSE, the data written to the chardev is a pulse/space
+sequence of integer values. Pulses and spaces are only marked implicitly by
+their position. The data must start and end with a pulse, therefore, the
+data must always include an uneven number of samples. The write function
+must block until the data has been transmitted by the hardware. If more data
+is provided than the hardware can send, the driver returns EINVAL.</para>
+<para>In LIRC_MODE_SCANCODE, two 32 bit unsigneds must be written. The
+first unsigned must have it highest 8 bits set to LIRC_MODE2_SCANCODE and
+the lowest 8 bit signify the rc protocol (see enum rc_type in rc-map.h).
+If the protocol supports repeats then that can be set using
+LIRC_SCANCODE_REPEAT and the same for LIRC_SCANCODE_TOGGLE. The next 32 bit
+unsigned is the scancode.
</section>
<section id="lirc_ioctl">
@@ -81,9 +92,10 @@ on working with the default settings initially.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term>LIRC_GET_SEND_MODE</term>
+ <term>LIRC_{G,S}ET_SEND_MODE</term>
<listitem>
- <para>Get supported transmit mode. Only LIRC_MODE_PULSE is supported by lircd.</para>
+ <para>Get or set the send mode. This can either be LIRC_MODE_PULSE or
+ LIRC_MODE_SCANCODE. </para>
</listitem>
</varlistentry>
<varlistentry>
@@ -155,13 +167,6 @@ on working with the default settings initially.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term>LIRC_SET_{SEND,REC}_MODE</term>
- <listitem>
- <para>Set send/receive mode. Largely obsolete for send, as only
- LIRC_MODE_PULSE is supported.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
<term>LIRC_SET_{SEND,REC}_CARRIER</term>
<listitem>
<para>Set send/receive carrier (in Hz).</para>
diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c
index 594535e..14d9b41 100644
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -141,16 +141,39 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
if (!dev || !dev->lirc)
return -EFAULT;
- if (n < sizeof(unsigned) || n % sizeof(unsigned))
- return -EINVAL;
+ if (dev->send_mode == LIRC_MODE_SCANCODE) {
+ unsigned c[2];
- count = n / sizeof(unsigned);
- if (count > LIRCBUF_SIZE || count % 2 == 0)
- return -EINVAL;
+ if (n != sizeof(unsigned) * 2)
+ return -EINVAL;
+
+ ret = copy_from_user(c, buf, n);
+ if (ret)
+ return ret;
+
+ txbuf = kmalloc(GFP_KERNEL, sizeof(unsigned) * LIRCBUF_SIZE);
+ if (!txbuf)
+ return -ENOMEM;
- txbuf = memdup_user(buf, n);
- if (IS_ERR(txbuf))
- return PTR_ERR(txbuf);
+ ret = ir_raw_encode(c[0] & LIRC_SCANCODE_PROTOCOL_MASK, c[1],
+ (c[0] & LIRC_SCANCODE_REPEAT) != 0,
+ (c[0] & LIRC_SCANCODE_TOGGLE) != 0,
+ txbuf, LIRCBUF_SIZE);
+ if (ret < 0)
+ goto out;
+ count = ret;
+ } else {
+ if (n < sizeof(unsigned) || n % sizeof(unsigned))
+ return -EINVAL;
+
+ count = n / sizeof(unsigned);
+ if (count > LIRCBUF_SIZE || count % 2 == 0)
+ return -EINVAL;
+
+ txbuf = memdup_user(buf, n);
+ if (IS_ERR(txbuf))
+ return PTR_ERR(txbuf);
+ }
if (!dev->tx_ir) {
ret = -ENOSYS;
@@ -173,7 +196,7 @@ 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);
+ ret = n;
/*
* The lircd gap calculation expects the write function to
@@ -216,16 +239,17 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
if (!(dev->lirc->features & LIRC_CAN_SEND_MASK))
return -ENOSYS;
- val = LIRC_MODE_PULSE;
+ val = dev->send_mode;
break;
case LIRC_SET_SEND_MODE:
if (!(dev->lirc->features & LIRC_CAN_SEND_MASK))
return -ENOSYS;
- if (val != LIRC_MODE_PULSE)
+ if (val != LIRC_MODE_PULSE && val != LIRC_MODE_SCANCODE)
return -EINVAL;
+ dev->send_mode = val;
return 0;
case LIRC_GET_REC_MODE:
@@ -386,13 +410,14 @@ int ir_lirc_register(struct rc_dev *dev)
if (dev->driver_type == RC_DRIVER_IR_RAW)
features |= LIRC_CAN_REC_MODE2;
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)
features |= LIRC_CAN_SET_SEND_CARRIER;
if (dev->s_tx_duty_cycle)
features |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
+ dev->send_mode = LIRC_MODE_PULSE;
}
if (dev->s_rx_carrier_range)
diff --git a/drivers/media/rc/ir-nec-decoder.c b/drivers/media/rc/ir-nec-decoder.c
index 7b81fec..1232084 100644
--- a/drivers/media/rc/ir-nec-decoder.c
+++ b/drivers/media/rc/ir-nec-decoder.c
@@ -200,9 +200,59 @@ static int ir_nec_decode(struct rc_dev *dev, struct ir_raw_event ev)
return -EINVAL;
}
+static int ir_nec_encode(enum rc_type type, u32 scancode, bool repeat,
+ bool toggle, unsigned *buf, unsigned count)
+{
+ unsigned i = 0, bits;
+
+ if (type != RC_TYPE_NEC)
+ return -EINVAL;
+
+ if (count < 3)
+ return -ENOSPC;
+
+ if (repeat) {
+ buf[i++] = NEC_HEADER_PULSE;
+ buf[i++] = NEC_REPEAT_SPACE;
+ buf[i++] = STATE_TRAILER_PULSE;
+ return 3;
+ }
+
+ if (count < 3 + NEC_NBITS * 2)
+ return -ENOSPC;
+
+ if (scancode < 0x10000) { /* normal NEC */
+ u32 cmd, addr;
+
+ addr = (scancode >> 8) & 0xff;
+ cmd = scancode & 0xff;
+
+ scancode = addr << 24 | (~addr & 0xff) << 16 |
+ cmd << 8 | (~cmd & 0xff);
+ } else if (scancode < 0x1000000) { /* extended NEC */
+ u32 cmd = scancode & 0xff;
+
+ scancode = (scancode & 0xffff00) << 8 |
+ (cmd << 8) | (~cmd & 0xff);
+ }
+
+ buf[i++] = NEC_HEADER_PULSE;
+ buf[i++] = NEC_HEADER_SPACE;
+ for (bits = 0; bits < NEC_NBITS; bits++) {
+ buf[i++] = NEC_BIT_PULSE;
+ buf[i++] = (scancode & 0x80000000) ?
+ NEC_BIT_1_SPACE : NEC_BIT_0_SPACE;
+ scancode <<= 1;
+ }
+ buf[i++] = STATE_TRAILER_PULSE;
+
+ return i;
+}
+
static struct ir_raw_handler nec_handler = {
.protocols = RC_BIT_NEC,
.decode = ir_nec_decode,
+ .encode = ir_nec_encode,
};
static int __init ir_nec_decode_init(void)
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index f613306..82d9132 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -25,6 +25,7 @@ struct ir_raw_handler {
u64 protocols; /* which are handled by this handler */
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
+ int (*encode)(enum rc_type protocol, u32 scancode, bool repeat, bool toggle, unsigned *buf, unsigned size);
/* These two should only be used by the mce kbd decoder */
int (*raw_register)(struct rc_dev *dev);
diff --git a/drivers/media/rc/rc-ir-raw.c b/drivers/media/rc/rc-ir-raw.c
index d298be7..d4e2144 100644
--- a/drivers/media/rc/rc-ir-raw.c
+++ b/drivers/media/rc/rc-ir-raw.c
@@ -351,6 +351,25 @@ void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler)
}
EXPORT_SYMBOL(ir_raw_handler_unregister);
+int ir_raw_encode(enum rc_type type, u32 scancode, bool repeat, bool toggle,
+ unsigned *buf, unsigned size)
+{
+ struct ir_raw_handler *handler;
+ u64 protocol = 1ull << type;
+ int ret = -ENOSYS;
+
+ mutex_lock(&ir_raw_handler_lock);
+ list_for_each_entry(handler, &ir_raw_handler_list, list) {
+ if (handler->protocols & protocol && handler->encode) {
+ ret = handler->encode(type, scancode, repeat, toggle,
+ buf, size);
+ break;
+ }
+ }
+ mutex_unlock(&ir_raw_handler_lock);
+ return ret;
+}
+
void ir_raw_init(void)
{
/* Load the decoder modules */
diff --git a/include/media/lirc.h b/include/media/lirc.h
index a635fc9..3807ded 100644
--- a/include/media/lirc.h
+++ b/include/media/lirc.h
@@ -60,6 +60,7 @@
#define LIRC_CAN_SEND_PULSE LIRC_MODE2SEND(LIRC_MODE_PULSE)
#define LIRC_CAN_SEND_MODE2 LIRC_MODE2SEND(LIRC_MODE_MODE2)
#define LIRC_CAN_SEND_LIRCCODE LIRC_MODE2SEND(LIRC_MODE_LIRCCODE)
+#define LIRC_CAN_SEND_SCANCODE LIRC_MODE2SEND(LIRC_MODE_SCANCODE)
#define LIRC_CAN_SEND_MASK 0x0000003f
diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index a8cef8c..601a5ba 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -163,7 +163,7 @@ struct rc_dev {
u64 gap_duration;
bool gap;
bool send_timeout_reports;
- u32 rec_mode;
+ u32 rec_mode, send_mode;
int (*change_protocol)(struct rc_dev *dev, u64 *rc_type);
int (*change_wakeup_protocol)(struct rc_dev *dev, u64 *rc_type);
int (*open)(struct rc_dev *dev);
@@ -258,6 +258,7 @@ int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type);
int ir_raw_event_store_with_filter(struct rc_dev *dev,
struct ir_raw_event *ev);
void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
+int ir_raw_encode(enum rc_type type, u32 scancode, bool repeat, bool toggle, unsigned *buf, unsigned size);
static inline void ir_raw_event_reset(struct rc_dev *dev)
{
--
2.1.0
--
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