[RFC PATCH 1/4] Changes to core input subsystem to allow send andreceive of IR messages. Encode and decode state machines areprovided for common IR porotocols such as Sony, JVC, NEC,Philips, etc.

From: Jon Smirl
Date: Mon Oct 06 2008 - 15:43:52 EST

Received IR messages generate event in the input queue.
IR messages are sent using an input IOCTL.

Jon Smirl
<jonsmirl@xxxxxxxxx>
---
drivers/input/Kconfig | 2
drivers/input/Makefile | 3
drivers/input/evdev.c | 55 +++
drivers/input/input.c | 21 +
drivers/input/ir-core.c | 659 +++++++++++++++++++++++++++++++++++++++
drivers/input/ir/Kconfig | 14 +
drivers/input/ir/Makefile | 5
include/linux/input.h | 101 ++++++
include/linux/mod_devicetable.h | 3
9 files changed, 862 insertions(+), 1 deletions(-)
create mode 100644 drivers/input/ir-core.c
create mode 100644 drivers/input/ir/Kconfig
create mode 100644 drivers/input/ir/Makefile

diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index 747633c..780d321 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -172,6 +172,8 @@ source "drivers/input/touchscreen/Kconfig"

source "drivers/input/misc/Kconfig"

+source "drivers/input/ir/Kconfig"
+
endif

menu "Hardware I/O ports"
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 6a1049b..da47340 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -5,7 +5,7 @@
# Each configuration option enables a list of files.

obj-$(CONFIG_INPUT) += input-core.o
-input-core-objs := input.o ff-core.o
+input-core-objs := input.o ff-core.o ir-core.o

obj-$(CONFIG_INPUT_FF_MEMLESS) += ff-memless.o
obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o
@@ -21,6 +21,7 @@ obj-$(CONFIG_INPUT_JOYSTICK) += joystick/
obj-$(CONFIG_INPUT_TABLET) += tablet/
obj-$(CONFIG_INPUT_TOUCHSCREEN) += touchscreen/
obj-$(CONFIG_INPUT_MISC) += misc/
+obj-$(CONFIG_INPUT_IR) += ir/

obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 3524bef..7a3f935 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -329,6 +329,14 @@ struct ff_effect_compat {
} u;
};

+struct ir_command_compat {
+ __u32 protocol;
+ __u32 device;
+ __u32 command;
+ __u32 transmitters;
+};
+
+
/* Note to the author of this code: did it ever occur to
you why the ifdefs are needed? Think about it again. -AK */
#ifdef CONFIG_X86_64
@@ -433,6 +441,32 @@ static int evdev_ff_effect_from_user(const char __user *buffer, size_t size,
return 0;
}

+static int evdev_ir_send_from_user(const char __user *buffer, size_t size,
+ struct ir_command *ir_command)
+{
+ if (COMPAT_TEST) {
+ struct ir_command_compat *compat_ir_command;
+
+ if (size != sizeof(struct ir_command_compat))
+ return -EINVAL;
+
+ compat_ir_command = (struct ir_command_compat *)ir_command;
+
+ if (copy_from_user(compat_ir_command, buffer,
+ sizeof(struct ir_command_compat)))
+ return -EFAULT;
+
+ } else {
+ if (size != sizeof(struct ir_command))
+ return -EINVAL;
+
+ if (copy_from_user(ir_command, buffer, sizeof(struct ir_command)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
#else

static inline size_t evdev_event_size(void)
@@ -470,6 +504,18 @@ static int evdev_ff_effect_from_user(const char __user *buffer, size_t size,
return 0;
}

+static int evdev_ir_send_from_user(const char __user *buffer, size_t size,
+ struct ir_command *ir_command)
+{
+ if (size != sizeof(struct ir_command))
+ return -EINVAL;
+
+ if (copy_from_user(ir_command, buffer, sizeof(struct ir_command)))
+ return -EFAULT;
+
+ return 0;
+}
+
#endif /* CONFIG_COMPAT */

static ssize_t evdev_write(struct file *file, const char __user *buffer,
@@ -696,6 +742,7 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
struct input_dev *dev = evdev->handle.dev;
struct input_absinfo abs;
struct ff_effect effect;
+ struct ir_command ir_command;
int __user *ip = (int __user *)p;
int i, t, u, v;
int error;
@@ -860,6 +907,14 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,

return 0;
}
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOIRSEND)) {
+
+ if (evdev_ir_send_from_user(p, _IOC_SIZE(cmd), &ir_command))
+ return -EFAULT;
+
+ return input_ir_send(dev, &ir_command, file);
+ }
}
}
return -EINVAL;
diff --git a/drivers/input/input.c b/drivers/input/input.c
index c13ced3..18f36d7 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -240,6 +240,10 @@ static void input_handle_event(struct input_dev *dev,
case EV_PWR:
disposition = INPUT_PASS_TO_ALL;
break;
+
+ case EV_IR:
+ disposition = INPUT_PASS_TO_ALL;
+ break;
}

if (disposition != INPUT_IGNORE_EVENT && type != EV_SYN)
@@ -693,6 +697,7 @@ static const struct input_device_id *input_match_device(const struct input_devic
MATCH_BIT(sndbit, SND_MAX);
MATCH_BIT(ffbit, FF_MAX);
MATCH_BIT(swbit, SW_MAX);
+ MATCH_BIT(irbit, IR_MAX);

return id;
}
@@ -815,6 +820,8 @@ static int input_devices_seq_show(struct seq_file *seq, void *v)
input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
if (test_bit(EV_SW, dev->evbit))
input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
+ if (test_bit(EV_IR, dev->evbit))
+ input_seq_print_bitmap(seq, "IR", dev->irbit, IR_MAX);

seq_putc(seq, '\n');

@@ -992,6 +999,8 @@ static int input_print_modalias(char *buf, int size, struct input_dev *id,
'f', id->ffbit, 0, FF_MAX);
len += input_print_modalias_bits(buf + len, size - len,
'w', id->swbit, 0, SW_MAX);
+ len += input_print_modalias_bits(buf + len, size - len,
+ 'i', id->irbit, 0, IR_MAX);

if (add_cr)
len += snprintf(buf + len, max(size - len, 0), "\n");
@@ -1093,6 +1102,7 @@ INPUT_DEV_CAP_ATTR(LED, led);
INPUT_DEV_CAP_ATTR(SND, snd);
INPUT_DEV_CAP_ATTR(FF, ff);
INPUT_DEV_CAP_ATTR(SW, sw);
+INPUT_DEV_CAP_ATTR(IR, ir);

static struct attribute *input_dev_caps_attrs[] = {
&dev_attr_ev.attr,
@@ -1104,6 +1114,7 @@ static struct attribute *input_dev_caps_attrs[] = {
&dev_attr_snd.attr,
&dev_attr_ff.attr,
&dev_attr_sw.attr,
+ &dev_attr_ir.attr,
NULL
};

@@ -1221,6 +1232,8 @@ static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env)
INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
if (test_bit(EV_SW, dev->evbit))
INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
+ if (test_bit(EV_IR, dev->evbit))
+ INPUT_ADD_HOTPLUG_BM_VAR("IR=", dev->irbit, IR_MAX);

INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);

@@ -1333,6 +1346,10 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
__set_bit(code, dev->ffbit);
break;

+ case EV_IR:
+ __set_bit(code, dev->irbit);
+ break;
+
case EV_PWR:
/* do nothing */
break;
@@ -1396,6 +1413,10 @@ int input_register_device(struct input_dev *dev)
if (error)
return error;

+ error = input_ir_register(dev);
+ if (error)
+ return error;
+
path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
printk(KERN_INFO "input: %s as %s\n",
dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
diff --git a/drivers/input/ir-core.c b/drivers/input/ir-core.c
new file mode 100644
index 0000000..8efcfa7
--- /dev/null
+++ b/drivers/input/ir-core.c
@@ -0,0 +1,659 @@
+/*
+ * Core routines for IR support
+ *
+ * Copyright (C) 2008 Jon Smirl <jonsmirl@xxxxxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/input.h>
+
+#undef IR_PROTOCOL_DEBUG
+#ifdef IR_PROTOCOL_DEBUG
+#define PDEBUG( format, arg... ) \
+ printk(KERN_DEBUG format , ## arg);
+#else
+#define PDEBUG(format, arg...) \
+ ({ if (0) printk(KERN_DEBUG format , ## arg); 0; })
+#endif
+
+static int encode_sony(struct ir_device *ir, struct ir_command *command)
+{
+ /* Sony SIRC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/sirc.htm */
+ int i, bit, dev, cmd, total;
+
+ ir->send.count = 0;
+ switch (command->protocol) {
+ case IR_PROTOCOL_SONY_20:
+ dev = 10; cmd = 10; break;
+ case IR_PROTOCOL_SONY_15:
+ dev = 8; cmd = 7; break;
+ default:
+ case IR_PROTOCOL_SONY_12:
+ dev = 5; cmd = 7; break;
+ }
+ ir->send.buffer[ir->send.count++] = 2400;
+ ir->send.buffer[ir->send.count++] = 600;
+
+ for (i = 0; i < cmd; i++) {
+ bit = command->command & 1;
+ command->command >>= 1;
+ ir->send.buffer[ir->send.count++] = (bit ? 1200 : 600);
+ ir->send.buffer[ir->send.count++] = 600;
+ }
+ for (i = 0; i < dev; i++) {
+ bit = command->device & 1;
+ command->device >>= 1;
+ ir->send.buffer[ir->send.count++] = (bit ? 1200 : 600);
+ ir->send.buffer[ir->send.count++] = 600;
+ }
+ total = 0;
+ for (i = 0; i < ir->send.count; i++)
+ total += ir->send.buffer[i];
+ ir->send.buffer[ir->send.count++] = 45000 - total;
+
+ memcpy(&ir->send.buffer[ir->send.count], &ir->send.buffer[0], ir->send.count * sizeof ir->send.buffer[0]);
+ ir->send.count += ir->send.count;
+ memcpy(&ir->send.buffer[ir->send.count], &ir->send.buffer[0], ir->send.count * sizeof ir->send.buffer[0]);
+ ir->send.count += ir->send.count;
+
+ return 0;
+}
+
+static int decode_sony(struct input_dev *dev, struct ir_protocol *sony, unsigned int d, unsigned int bit)
+{
+ /* Sony SIRC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/sirc.htm */
+ /* based on a 600us cadence */
+ int ret = 0, delta = d;
+
+ delta = (delta + 300) / 600;
+
+ if ((bit == 0) && (delta > 22)) {
+ PDEBUG("SIRC state 1\n");
+ if ((sony->state == 26) || (sony->state == 32) || (sony->state == 42)) {
+ if (sony->good && (sony->good == sony->code)) {
+
+ input_report_ir(dev, IR_PROTOCOL, (sony->state == 26) ? IR_PROTOCOL_SONY_12 :
+ (sony->state == 32) ? IR_PROTOCOL_SONY_15 : IR_PROTOCOL_SONY_20);
+
+ if (sony->state == 26) {
+ input_report_ir(dev, IR_DEVICE, sony->code & 0x1F);
+ input_report_ir(dev, IR_COMMAND, sony->code >> 5);
+ } else {
+ input_report_ir(dev, IR_DEVICE, sony->code & 0xFF);
+ input_report_ir(dev, IR_COMMAND, sony->code >> 8);
+ }
+ input_sync(dev);
+
+ sony->good = 0;
+ ret = 1;
+ } else {
+ PDEBUG("SIRC - Saving %d bit %05x\n", (sony->state - 2) / 2, sony->code);
+ sony->good = sony->code;
+ }
+ }
+ sony->state = 1;
+ sony->code = 0;
+ return ret;
+ }
+ if ((sony->state == 1) && (bit == 1) && (delta == 4)) {
+ sony->state = 2;
+ PDEBUG("SIRC state 2\n");
+ return 0;
+ }
+ if ((sony->state == 2) && (bit == 0) && (delta == 1)) {
+ sony->state = 3;
+ PDEBUG("SIRC state 3\n");
+ return 0;
+ }
+ if ((sony->state >= 3) && (sony->state & 1) && (bit == 1) && ((delta == 1) || (delta == 2))) {
+ sony->state++;
+ sony->code |= ((delta - 1) << ((sony->state - 4) / 2));
+ PDEBUG("SIRC state %d bit %d\n", sony->state, delta - 1);
+ return 0;
+ }
+ if ((sony->state >= 3) && !(sony->state & 1) && (bit == 0) && (delta == 1)) {
+ sony->state++;
+ PDEBUG("SIRC state %d\n", sony-> state);
+ return 0;
+ }
+ sony->state = 0;
+ return 0;
+}
+
+
+static int encode_jvc(struct ir_device *ir, struct ir_command *command)
+{
+ /* JVC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/jvc.htm */
+ int i, bit, total;
+
+ ir->send.count = 0;
+
+ ir->send.buffer[ir->send.count++] = 8400;
+ ir->send.buffer[ir->send.count++] = 4200;
+
+ for (i = 0; i < 8; i++) {
+ bit = command->device & 1;
+ command->device >>= 1;
+ ir->send.buffer[ir->send.count++] = 525;
+ ir->send.buffer[ir->send.count++] = (bit ? 1575 : 525);
+ }
+ for (i = 0; i < 8; i++) {
+ bit = command->command & 1;
+ command->command >>= 1;
+ ir->send.buffer[ir->send.count++] = 525;
+ ir->send.buffer[ir->send.count++] = (bit ? 1575 : 525);
+ }
+ ir->send.buffer[ir->send.count++] = 525;
+
+ total = 0;
+ for (i = 0; i < ir->send.count; i++)
+ total += ir->send.buffer[i];
+ ir->send.buffer[ir->send.count] = 55000 - total;
+
+ return 0;
+}
+
+static int decode_jvc(struct input_dev *dev, struct ir_protocol *jvc, unsigned int d, unsigned int bit)
+{
+ /* JVC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/jvc.htm */
+ /* based on a 525us cadence */
+ int ret = 0, delta = d;
+
+ delta = (delta + 263) / 525;
+
+ if ((bit == 0) && (delta > 22)) {
+ PDEBUG("JVC state 1\n");
+ jvc->state = 1;
+ jvc->code = 0;
+ return ret;
+ }
+ if ((jvc->state == 1) && (bit == 1) && (delta == 16)) {
+ jvc->state = 2;
+ PDEBUG("JVC state 2\n");
+ return 0;
+ }
+ if ((jvc->state == 2) && (bit == 0) && (delta == 8)) {
+ jvc->state = 3;
+ PDEBUG("JVC state 3\n");
+ return 0;
+ }
+ if ((jvc->state >= 3) && (jvc->state & 1) && (bit == 1) && (delta == 1)) {
+ jvc->state++;
+ PDEBUG("JVC state %d\n", jvc-> state);
+ return 0;
+ }
+ if ((jvc->state >= 3) && !(jvc->state & 1) && (bit == 0) && ((delta == 1) || (delta == 3))) {
+ if (delta == 3)
+ jvc->code |= 1 << ((jvc->state - 4) / 2);
+ jvc->state++;
+ PDEBUG("JVC state %d bit %d\n", jvc->state, delta - 1);
+ if (jvc->state == 34) {
+ jvc->state = 3;
+ if (jvc->good && (jvc->good == jvc->code)) {
+ input_report_ir(dev, IR_PROTOCOL, IR_PROTOCOL_JVC);
+ input_report_ir(dev, IR_DEVICE, jvc->code >> 8);
+ input_report_ir(dev, IR_COMMAND, jvc->code & 0xFF);
+ input_sync(dev);
+ jvc->good = 0;
+ ret = 1;
+ } else {
+ PDEBUG("JVC - Saving 16 bit %05x\n", jvc->code);
+ jvc->good = jvc->code;
+ }
+ jvc->code = 0;
+ }
+ return 0;
+ }
+ jvc->state = 0;
+ return 0;
+}
+
+
+static int encode_nec(struct ir_device *ir, struct ir_command *command)
+{
+ /* NEC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/nec.htm */
+ int i, bit, total;
+
+ ir->send.count = 0;
+
+ ir->send.buffer[ir->send.count++] = 9000;
+ ir->send.buffer[ir->send.count++] = 4500;
+
+ for (i = 0; i < 8; i++) {
+ bit = command->device & 1;
+ command->device >>= 1;
+ ir->send.buffer[ir->send.count++] = 563;
+ ir->send.buffer[ir->send.count++] = (bit ? 1687 : 562);
+ }
+ for (i = 0; i < 8; i++) {
+ bit = command->command & 1;
+ command->command >>= 1;
+ ir->send.buffer[ir->send.count++] = 563;
+ ir->send.buffer[ir->send.count++] = (bit ? 1687 : 562);
+ }
+ ir->send.buffer[ir->send.count++] = 562;
+
+ total = 0;
+ for (i = 0; i < ir->send.count; i++)
+ total += ir->send.buffer[i];
+ ir->send.buffer[ir->send.count] = 110000 - total;
+
+ return 0;
+}
+
+static int decode_nec(struct input_dev *dev, struct ir_protocol *nec, unsigned int d, unsigned int bit)
+{
+ /* NEC IR code */
+ /* http://www.sbprojects.com/knowledge/ir/nec.htm */
+ /* based on a 560us cadence */
+ int delta = d;
+
+ delta = (delta + 280) / 560;
+
+ if ((bit == 0) && (delta > 22)) {
+ PDEBUG("nec state 1\n");
+ nec->state = 1;
+ nec->code = 0;
+ return 0;
+ }
+ if ((nec->state == 1) && (bit == 1) && (delta == 16)) {
+ nec->state = 2;
+ PDEBUG("nec state 2\n");
+ return 0;
+ }
+ if ((nec->state == 2) && (bit == 0) && (delta == 8)) {
+ nec->state = 3;
+ PDEBUG("nec state 3\n");
+ return 0;
+ }
+ if ((nec->state >= 3) && (nec->state & 1) && (bit == 1) && (delta == 1)) {
+ nec->state++;
+ PDEBUG("nec state %d\n", nec-> state);
+ if (nec->state == 68) {
+ input_report_ir(dev, IR_PROTOCOL, IR_PROTOCOL_NEC);
+ input_report_ir(dev, IR_DEVICE, nec->code >> 16);
+ input_report_ir(dev, IR_COMMAND, nec->code & 0xFFFF);
+ input_sync(dev);
+ return 1;
+ }
+ return 0;
+ }
+ if ((nec->state >= 3) && !(nec->state & 1) && (bit == 0) && ((delta == 1) || (delta == 3))) {
+ if (delta == 3)
+ nec->code |= 1 << ((nec->state - 4) / 2);
+ nec->state++;
+ PDEBUG("nec state %d bit %d\n", nec->state, delta - 1);
+ return 0;
+ }
+ nec->state = 0;
+ nec->code = 0;
+ return 0;
+}
+
+
+static int encode_rc5(struct ir_device *ir, struct ir_command *command)
+{
+ /* Philips RC-5 IR code */
+ /* http://www.sbprojects.com/knowledge/ir/rc5.htm */
+ return 0;
+}
+
+static int decode_rc5(struct input_dev *dev, struct ir_protocol *rc5, unsigned int d, unsigned int bit)
+{
+ /* Philips RC-5 IR code */
+ /* http://www.sbprojects.com/knowledge/ir/rc5.htm */
+ /* based on a 889us cadence */
+ int delta = d;
+
+ delta = (delta + 444) / 889;
+
+ return 0;
+}
+
+
+static int encode_rc6(struct ir_device *ir, struct ir_command *command)
+{
+ /* Philips RC-6 IR code */
+ /* http://www.sbprojects.com/knowledge/ir/rc6.htm */
+ int i, bit, last;
+
+ ir->send.count = 0;
+
+ ir->send.buffer[ir->send.count++] = 2666;
+ ir->send.buffer[ir->send.count++] = 889;
+
+ ir->send.buffer[ir->send.count++] = 444;
+ ir->send.buffer[ir->send.count++] = 444;
+
+ last = 1;
+ for (i = 0; i < 8; i++) {
+ bit = command->device & 1;
+ command->device >>= 1;
+
+ if (last != bit)
+ ir->send.buffer[ir->send.count - 1] += 444;
+ else
+ ir->send.buffer[ir->send.count++] = 444;
+ ir->send.buffer[ir->send.count++] = 444;
+ last = bit;
+ }
+ for (i = 0; i < 8; i++) {
+ bit = command->command & 1;
+ command->command >>= 1;
+
+ if (last != bit)
+ ir->send.buffer[ir->send.count - 1] += 444;
+ else
+ ir->send.buffer[ir->send.count++] = 444;
+ ir->send.buffer[ir->send.count++] = 444;
+ last = bit;
+ }
+ ir->send.buffer[ir->send.count] = 2666;
+
+ return 0;
+}
+
+static void decode_rc6_bit(struct input_dev *dev, struct ir_protocol *rc6, unsigned int bit)
+{
+ /* bits come in one at a time */
+ /* when two are collected look for a symbol */
+ /* rc6->bits == 1 is a zero symbol */
+ /* rc6->bits == 2 is a one symbol */
+ rc6->count++;
+ rc6->bits <<= 1;
+ rc6->bits |= bit;
+ if (rc6->count == 2) {
+ if ((rc6->bits == 0) || (rc6->bits == 3)) {
+ rc6->mode = rc6->code;
+ rc6->code = 0;
+ } else {
+ rc6->code <<= 1;
+ if (rc6->bits == 2)
+ rc6->code |= 1;
+ }
+ rc6->count = 0;
+ if (rc6->state == 23) {
+ input_report_ir(dev, IR_PROTOCOL, IR_PROTOCOL_PHILIPS_RC6);
+ input_report_ir(dev, IR_DEVICE, rc6->code >> 8);
+ input_report_ir(dev, IR_COMMAND, rc6->code & 0xFF);
+ input_sync(dev);
+ rc6->state = 0;
+ } else
+ rc6->state++;
+ PDEBUG("rc6 state %d bit %d\n", rc6->state, rc6->bits == 2);
+ rc6->bits = 0;
+ }
+}
+
+static int decode_rc6(struct input_dev *dev, struct ir_protocol *rc6, unsigned int d, unsigned int bit)
+{
+ /* Philips RC-6 IR code */
+ /* http://www.sbprojects.com/knowledge/ir/rc6.htm */
+ /* based on a 444us cadence */
+
+ int delta = d;
+
+ delta = (delta + 222) / 444;
+
+ if ((bit == 0) && (delta > 19)) {
+ rc6->count = 0;
+ rc6->bits = 0;
+ rc6->state = 1;
+ rc6->code = 0;
+ PDEBUG("rc6 state 1\n");
+ return 0;
+ }
+ if ((rc6->state == 1) && (bit == 1) && (delta == 6)) {
+ rc6->state = 2;
+ PDEBUG("rc6 state 2\n");
+ return 0;
+ }
+ if ((rc6->state == 2) && (bit == 0) && (delta == 2)) {
+ rc6->state = 3;
+ PDEBUG("rc6 state 3\n");
+ return 0;
+ }
+ if (rc6->state >= 3) {
+ if ((delta >= 1) || (delta <= 3)) {
+ while (delta-- >= 1)
+ decode_rc6_bit(dev, rc6, bit);
+ return 0;
+ }
+ }
+ rc6->state = 0;
+ rc6->code = 0;
+ return 0;
+}
+
+static void record_raw(struct input_dev *dev, unsigned int delta, unsigned int bit)
+{
+ int head = dev->ir->raw.head;
+ if (bit)
+ delta = -delta;
+
+ head += 1;
+ if (head > sizeof dev->ir->raw.buffer)
+ head = 0;
+
+ if (head != dev->ir->raw.tail) {
+ dev->ir->raw.buffer[dev->ir->raw.head] = delta;
+ dev->ir->raw.head = head;
+ }
+}
+
+void input_ir_decode(struct input_dev *dev, unsigned int delta, unsigned int bit)
+{
+ PDEBUG("IR bit %d %d\n", delta, bit);
+ record_raw(dev, delta, bit);
+ decode_sony(dev, &dev->ir->sony, delta, bit);
+ decode_jvc(dev, &dev->ir->jvc, delta, bit);
+ decode_nec(dev, &dev->ir->nec, delta, bit);
+ decode_rc5(dev, &dev->ir->rc5, delta, bit);
+ decode_rc6(dev, &dev->ir->rc6, delta, bit);
+}
+EXPORT_SYMBOL_GPL(input_ir_decode);
+
+static ssize_t ir_raw_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct input_dev *input_dev = to_input_dev(dev);
+ unsigned int i = input_dev->ir->raw.tail;
+ unsigned int count = 0;
+
+ printk("head %d tail %d\n", input_dev->ir->raw.head, input_dev->ir->raw.tail);
+ while (i != input_dev->ir->raw.head) {
+ count += snprintf(&buf[count], PAGE_SIZE, "%i\n", input_dev->ir->raw.buffer[i++]);
+ if (count >= PAGE_SIZE) {
+ input_dev->ir->raw.tail = i;
+ return PAGE_SIZE;
+ }
+ if (i > sizeof input_dev->ir->raw.buffer)
+ i = 0;
+ }
+ input_dev->ir->raw.tail = i;
+ return count;
+}
+
+static ssize_t ir_raw_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ir_device *ir = to_input_dev(dev)->ir;
+ long delta;
+ int i = count;
+ int first = 0;
+
+ if (!ir->xmit)
+ return count;
+ ir->send.count = 0;
+
+ while (i > 0) {
+ i -= strict_strtoul(&buf[i], i, &delta);
+ while ((buf[i] != '\n') && (i > 0))
+ i--;
+ i--;
+ /* skip leading zeros */
+ if ((delta > 0) && !first)
+ continue;
+
+ ir->send.buffer[ir->send.count++] = abs(delta);
+ }
+
+ ir->xmit(ir->private, ir->send.buffer, ir->send.count, ir->raw.carrier, ir->raw.xmitter);
+
+ return count;
+}
+
+static ssize_t ir_carrier_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ir_device *ir = to_input_dev(dev)->ir;
+
+ return sprintf(buf, "%i\n", ir->raw.carrier);
+}
+
+static ssize_t ir_carrier_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ir_device *ir = to_input_dev(dev)->ir;
+
+ ir->raw.carrier = simple_strtoul(buf, NULL, 0);
+ return count;
+}
+
+static ssize_t ir_xmitter_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ir_device *ir = to_input_dev(dev)->ir;
+
+ return sprintf(buf, "%i\n", ir->raw.xmitter);
+}
+
+static ssize_t ir_xmitter_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ir_device *ir = to_input_dev(dev)->ir;
+
+ ir->raw.xmitter = simple_strtoul(buf, NULL, 0);
+ return count;
+}
+
+static DEVICE_ATTR(ir_raw, 0644, ir_raw_show, ir_raw_store);
+static DEVICE_ATTR(ir_carrier, 0644, ir_carrier_show, ir_carrier_store);
+static DEVICE_ATTR(ir_xmitter, 0644, ir_xmitter_show, ir_xmitter_store);
+
+int input_ir_register(struct input_dev *dev)
+{
+ int rc;
+
+ if (!dev->ir)
+ return 0;
+
+ rc = device_create_file(&dev->dev, &dev_attr_ir_raw);
+ if (rc)
+ return rc;
+
+ rc = device_create_file(&dev->dev, &dev_attr_ir_carrier);
+ if (rc)
+ return rc;
+
+ rc = device_create_file(&dev->dev, &dev_attr_ir_xmitter);
+ return rc;
+}
+
+int input_ir_create(struct input_dev *dev, void *private, send_func xmit)
+{
+ dev->ir = kzalloc(sizeof(struct ir_device), GFP_KERNEL);
+ if (!dev->ir)
+ return -ENOMEM;
+
+ dev->evbit[0] = BIT_MASK(EV_IR);
+ dev->ir->private = private;
+ dev->ir->xmit = xmit;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(input_ir_create);
+
+
+void input_ir_destroy(struct input_dev *dev)
+{
+ if (dev->ir) {
+ kfree(dev->ir);
+ dev->ir = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(input_ir_destroy);
+
+int input_ir_send(struct input_dev *dev, struct ir_command *ir_command, struct file *file)
+{
+ unsigned freq, xmit = 0;
+ int ret;
+
+ mutex_lock(&dev->ir->lock);
+
+ switch (ir_command->protocol) {
+ case IR_PROTOCOL_PHILIPS_RC5:
+ freq = 36000;
+ encode_rc5(dev->ir, ir_command);
+ break;
+ case IR_PROTOCOL_PHILIPS_RC6:
+ freq = 36000;
+ encode_rc6(dev->ir, ir_command);
+ break;
+ case IR_PROTOCOL_PHILIPS_RCMM:
+ freq = 36000;
+ encode_rc5(dev->ir, ir_command);
+ break;
+ case IR_PROTOCOL_JVC:
+ freq = 38000;
+ encode_jvc(dev->ir, ir_command);
+ break;
+ case IR_PROTOCOL_NEC:
+ freq = 38000;
+ encode_nec(dev->ir, ir_command);
+ break;
+ case IR_PROTOCOL_NOKIA:
+ case IR_PROTOCOL_SHARP:
+ case IR_PROTOCOL_PHILIPS_RECS80:
+ freq = 38000;
+ break;
+ case IR_PROTOCOL_SONY_12:
+ case IR_PROTOCOL_SONY_15:
+ case IR_PROTOCOL_SONY_20:
+ encode_sony(dev->ir, ir_command);
+ freq = 40000;
+ break;
+ case IR_PROTOCOL_RCA:
+ freq = 56000;
+ break;
+ case IR_PROTOCOL_ITT:
+ freq = 0;
+ break;
+ default:
+ ret = -ENODEV;
+ goto exit;
+ }
+
+ if (dev->ir && dev->ir->xmit)
+ ret = dev->ir->xmit(dev->ir->private, dev->ir->send.buffer, dev->ir->send.count, freq, xmit);
+ else
+ ret = -ENODEV;
+
+exit:
+ mutex_unlock(&dev->ir->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(input_ir_send);
+
diff --git a/drivers/input/ir/Kconfig b/drivers/input/ir/Kconfig
new file mode 100644
index 0000000..8afd2d6
--- /dev/null
+++ b/drivers/input/ir/Kconfig
@@ -0,0 +1,14 @@
+#
+# LIRC driver(s) configuration
+#
+menuconfig INPUT_IR
+ bool "Infrared Remote (IR) receiver/transmitter drivers"
+ default n
+ help
+ Say Y here, and all supported Infrared Remote Control IR
+ receiver and transmitter drivers will be displayed. The receiver drivers
+ allow control of your Linux system via remote control.
+
+if INPUT_IR
+
+endif
diff --git a/drivers/input/ir/Makefile b/drivers/input/ir/Makefile
new file mode 100644
index 0000000..08e6954
--- /dev/null
+++ b/drivers/input/ir/Makefile
@@ -0,0 +1,5 @@
+# Makefile for the ir drivers.
+#
+
+# Each configuration option enables a list of files.
+
diff --git a/include/linux/input.h b/include/linux/input.h
index a5802c9..2fbdf5a 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -79,6 +79,8 @@ struct input_absinfo {
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */

+#define EVIOIRSEND _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ir_command)) /* send an IR command */
+
#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */

/*
@@ -97,6 +99,7 @@ struct input_absinfo {
#define EV_FF 0x15
#define EV_PWR 0x16
#define EV_FF_STATUS 0x17
+#define EV_IR 0x18
#define EV_MAX 0x1f
#define EV_CNT (EV_MAX+1)

@@ -946,6 +949,55 @@ struct ff_effect {
#define FF_MAX 0x7f
#define FF_CNT (FF_MAX+1)

+/*
+ * IR Support
+ */
+
+#define IR_PROTOCOL_JVC 1
+#define IR_PROTOCOL_NEC 2
+#define IR_PROTOCOL_NOKIA 3
+#define IR_PROTOCOL_SHARP 4
+#define IR_PROTOCOL_SONY_12 5
+#define IR_PROTOCOL_SONY_15 6
+#define IR_PROTOCOL_SONY_20 7
+#define IR_PROTOCOL_PHILIPS_RC5 8
+#define IR_PROTOCOL_PHILIPS_RC6 9
+#define IR_PROTOCOL_PHILIPS_RCMM 10
+#define IR_PROTOCOL_PHILIPS_RECS80 11
+#define IR_PROTOCOL_RCA 12
+#define IR_PROTOCOL_ITT 13
+
+#define IR_PROTOCOL 1
+#define IR_DEVICE 2
+#define IR_COMMAND 3
+
+#define IR_CAP_RECEIVE_BASEBAND 0
+#define IR_CAP_RECEIVE_36K 1
+#define IR_CAP_RECEIVE_38K 2
+#define IR_CAP_RECEIVE_40K 3
+#define IR_CAP_RECEIVE_56K 4
+#define IR_CAP_SEND_BASEBAND 5
+#define IR_CAP_SEND_36K 6
+#define IR_CAP_SEND_38K 7
+#define IR_CAP_SEND_40K 8
+#define IR_CAP_SEND_56K 9
+#define IR_CAP_XMITTER_1 10
+#define IR_CAP_XMITTER_2 11
+#define IR_CAP_XMITTER_3 12
+#define IR_CAP_XMITTER_4 13
+#define IR_CAP_RECEIVE_RAW 14
+#define IR_CAP_SEND_RAW 15
+#define IR_MAX 0x0f
+#define IR_CNT IR_MAX + 1
+
+struct ir_command {
+ __u32 protocol;
+ __u32 device;
+ __u32 command;
+ __u32 transmitters;
+};
+
+
#ifdef __KERNEL__

/*
@@ -973,6 +1025,7 @@ struct ff_effect {
* @sndbit: bitmap of sound effects supported by the device
* @ffbit: bitmap of force feedback effects supported by the device
* @swbit: bitmap of switches present on the device
+ * @irbit: bitmap of capabilies of the IR hardware
* @keycodemax: size of keycode table
* @keycodesize: size of elements in keycode table
* @keycode: map of scancodes to keycodes for this device
@@ -1045,6 +1098,7 @@ struct input_dev {
unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
unsigned long swbit[BITS_TO_LONGS(SW_CNT)];
+ unsigned long irbit[BITS_TO_LONGS(IR_CNT)];

unsigned int keycodemax;
unsigned int keycodesize;
@@ -1053,6 +1107,7 @@ struct input_dev {
int (*getkeycode)(struct input_dev *dev, int scancode, int *keycode);

struct ff_device *ff;
+ struct ir_device *ir;

unsigned int repeat_key;
struct timer_list timer;
@@ -1288,6 +1343,11 @@ static inline void input_report_switch(struct input_dev *dev, unsigned int code,
input_event(dev, EV_SW, code, !!value);
}

+static inline void input_report_ir(struct input_dev *dev, unsigned int code, int value)
+{
+ input_event(dev, EV_IR, code, value);
+}
+
static inline void input_sync(struct input_dev *dev)
{
input_event(dev, EV_SYN, SYN_REPORT, 0);
@@ -1366,5 +1426,46 @@ int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
int input_ff_create_memless(struct input_dev *dev, void *data,
int (*play_effect)(struct input_dev *, void *, struct ff_effect *));

+/**
+ * struct ir_device - IR support structures
+ */
+
+struct ir_protocol {
+ unsigned int state, code, good, count, bits, mode;
+};
+
+typedef int (*send_func)(void *private, unsigned int *buffer, unsigned int count,
+ unsigned int frequency, unsigned int xmitters);
+
+struct ir_device {
+ struct ir_protocol sony;
+ struct ir_protocol jvc;
+ struct ir_protocol nec;
+ struct ir_protocol rc5;
+ struct ir_protocol rc6;
+ struct mutex lock;
+ void *private;
+ send_func xmit;
+ struct {
+ unsigned int buffer[200];
+ unsigned int count;
+ } send;
+ struct {
+ int buffer[200];
+ unsigned int head;
+ unsigned int tail;
+ unsigned int carrier;
+ unsigned int xmitter;
+ } raw;
+};
+
+int input_ir_create(struct input_dev *dev, void *private, send_func send);
+void input_ir_destroy(struct input_dev *dev);
+
+void input_ir_decode(struct input_dev *dev, unsigned int delta, unsigned int bit);
+int input_ir_send(struct input_dev *dev, struct ir_command *ir_command, struct file *file);
+
+int input_ir_register(struct input_dev *dev);
+
#endif
#endif
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index c4db582..cb088ec 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -282,6 +282,7 @@ struct pcmcia_device_id {
#define INPUT_DEVICE_ID_SND_MAX 0x07
#define INPUT_DEVICE_ID_FF_MAX 0x7f
#define INPUT_DEVICE_ID_SW_MAX 0x0f
+#define INPUT_DEVICE_ID_IR_MAX 0x0f

#define INPUT_DEVICE_ID_MATCH_BUS 1
#define INPUT_DEVICE_ID_MATCH_VENDOR 2
@@ -297,6 +298,7 @@ struct pcmcia_device_id {
#define INPUT_DEVICE_ID_MATCH_SNDBIT 0x0400
#define INPUT_DEVICE_ID_MATCH_FFBIT 0x0800
#define INPUT_DEVICE_ID_MATCH_SWBIT 0x1000
+#define INPUT_DEVICE_ID_MATCH_IRBIT 0x2000

struct input_device_id {

@@ -316,6 +318,7 @@ struct input_device_id {
kernel_ulong_t sndbit[INPUT_DEVICE_ID_SND_MAX / BITS_PER_LONG + 1];
kernel_ulong_t ffbit[INPUT_DEVICE_ID_FF_MAX / BITS_PER_LONG + 1];
kernel_ulong_t swbit[INPUT_DEVICE_ID_SW_MAX / BITS_PER_LONG + 1];
+ kernel_ulong_t irbit[INPUT_DEVICE_ID_IR_MAX / BITS_PER_LONG + 1];

kernel_ulong_t driver_info;
};

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