This patch adds a Sony12/15/20 decoder to ir-core.
Signed-off-by: David Härdeman <david@xxxxxxxxxxx>
---
drivers/media/IR/Kconfig | 9 +
drivers/media/IR/Makefile | 1
drivers/media/IR/ir-core-priv.h | 7 +
drivers/media/IR/ir-raw-event.c | 1
drivers/media/IR/ir-sony-decoder.c | 312 ++++++++++++++++++++++++++++++++++++
drivers/media/IR/ir-sysfs.c | 4
6 files changed, 334 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/IR/ir-sony-decoder.c
diff --git a/drivers/media/IR/Kconfig b/drivers/media/IR/Kconfig
index 179e4c3..25e10b5 100644
--- a/drivers/media/IR/Kconfig
+++ b/drivers/media/IR/Kconfig
@@ -45,3 +45,12 @@ config IR_JVC_DECODER
---help---
Enable this option if you have an infrared remote control which
uses the JVC protocol, and you need software decoding support.
+
+config IR_SONY_DECODER
+ tristate "Enable IR raw decoder for the Sony protocol"
+ depends on IR_CORE
+ default y
+
+ ---help---
+ Enable this option if you have an infrared remote control which
+ uses the Sony protocol, and you need software decoding support.
diff --git a/drivers/media/IR/Makefile b/drivers/media/IR/Makefile
index 8d0098f..a12ee37 100644
--- a/drivers/media/IR/Makefile
+++ b/drivers/media/IR/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_IR_NEC_DECODER) += ir-nec-decoder.o
obj-$(CONFIG_IR_RC5_DECODER) += ir-rc5-decoder.o
obj-$(CONFIG_IR_RC6_DECODER) += ir-rc6-decoder.o
obj-$(CONFIG_IR_JVC_DECODER) += ir-jvc-decoder.o
+obj-$(CONFIG_IR_SONY_DECODER) += ir-sony-decoder.o
diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h
index 4b1a21d..04962a6 100644
--- a/drivers/media/IR/ir-core-priv.h
+++ b/drivers/media/IR/ir-core-priv.h
@@ -118,4 +118,11 @@ void ir_raw_init(void);
#define load_jvc_decode() 0
#endif
+/* from ir-sony-decoder.c */
+#ifdef CONFIG_IR_SONY_DECODER_MODULE
+#define load_sony_decode() request_module("ir-sony-decoder")
+#else
+#define load_sony_decode() 0
+#endif
+
#endif /* _IR_RAW_EVENT */
diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c
index 7eef6bf..ea68a3f 100644
--- a/drivers/media/IR/ir-raw-event.c
+++ b/drivers/media/IR/ir-raw-event.c
@@ -234,6 +234,7 @@ static void init_decoders(struct work_struct *work)
load_rc5_decode();
load_rc6_decode();
load_jvc_decode();
+ load_sony_decode();
/* If needed, we may later add some init code. In this case,
it is needed to change the CONFIG_MODULE test at ir-core.h
diff --git a/drivers/media/IR/ir-sony-decoder.c b/drivers/media/IR/ir-sony-decoder.c
new file mode 100644
index 0000000..9f440c5
--- /dev/null
+++ b/drivers/media/IR/ir-sony-decoder.c
@@ -0,0 +1,312 @@
+/* ir-sony-decoder.c - handle Sony IR Pulse/Space protocol
+ *
+ * Copyright (C) 2010 by David Härdeman <david@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitrev.h>
+#include "ir-core-priv.h"
+
+#define SONY_UNIT 600000 /* ns */
+#define SONY_HEADER_PULSE (4 * SONY_UNIT)
+#define SONY_HEADER_SPACE (1 * SONY_UNIT)
+#define SONY_BIT_0_PULSE (1 * SONY_UNIT)
+#define SONY_BIT_1_PULSE (2 * SONY_UNIT)
+#define SONY_BIT_SPACE (1 * SONY_UNIT)
+#define SONY_TRAILER_SPACE (10 * SONY_UNIT) /* minimum */
+
+/* Used to register sony_decoder clients */
+static LIST_HEAD(decoder_list);
+static DEFINE_SPINLOCK(decoder_lock);
+
+enum sony_state {
+ STATE_INACTIVE,
+ STATE_HEADER_SPACE,
+ STATE_BIT_PULSE,
+ STATE_BIT_SPACE,
+ STATE_FINISHED,
+};
+
+struct decoder_data {
+ struct list_head list;
+ struct ir_input_dev *ir_dev;
+ int enabled:1;
+
+ /* State machine control */
+ enum sony_state state;
+ u32 sony_bits;
+ unsigned count;
+};
+
+
+/**
+ * get_decoder_data() - gets decoder data
+ * @input_dev: input device
+ *
+ * Returns the struct decoder_data that corresponds to a device
+ */
+static struct decoder_data *get_decoder_data(struct ir_input_dev *ir_dev)
+{
+ struct decoder_data *data = NULL;
+
+ spin_lock(&decoder_lock);
+ list_for_each_entry(data, &decoder_list, list) {
+ if (data->ir_dev == ir_dev)
+ break;
+ }
+ spin_unlock(&decoder_lock);
+ return data;
+}
+
+static ssize_t store_enabled(struct device *d,
+ struct device_attribute *mattr,
+ const char *buf,
+ size_t len)
+{
+ unsigned long value;
+ struct ir_input_dev *ir_dev = dev_get_drvdata(d);
+ struct decoder_data *data = get_decoder_data(ir_dev);
+
+ if (!data)
+ return -EINVAL;
+
+ if (strict_strtoul(buf, 10, &value) || value > 1)
+ return -EINVAL;
+
+ data->enabled = value;
+
+ return len;
+}
+
+static ssize_t show_enabled(struct device *d,
+ struct device_attribute *mattr, char *buf)
+{
+ struct ir_input_dev *ir_dev = dev_get_drvdata(d);
+ struct decoder_data *data = get_decoder_data(ir_dev);
+
+ if (!data)
+ return -EINVAL;
+
+ if (data->enabled)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled);
+
+static struct attribute *decoder_attributes[] = {
+ &dev_attr_enabled.attr,
+ NULL
+};
+
+static struct attribute_group decoder_attribute_group = {
+ .name = "sony_decoder",
+ .attrs = decoder_attributes,
+};
+
+/**
+ * ir_sony_decode() - Decode one Sony pulse or space
+ * @input_dev: the struct input_dev descriptor of the device
+ * @ev: the struct ir_raw_event descriptor of the pulse/space
+ *
+ * This function returns -EINVAL if the pulse violates the state machine
+ */
+static int ir_sony_decode(struct input_dev *input_dev, struct ir_raw_event ev)
+{
+ struct decoder_data *data;
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ u32 scancode;
+ u8 device, subdevice, function;
+
+ data = get_decoder_data(ir_dev);
+ if (!data)
+ return -EINVAL;
+
+ if (!data->enabled)
+ return 0;
+
+ if (IS_RESET(ev)) {
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+
+ if (!geq_margin(ev.duration, SONY_UNIT, SONY_UNIT / 2))
+ goto out;
+
+ IR_dprintk(2, "Sony decode started at state %d (%uus %s)\n",
+ data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+
+ switch (data->state) {
+
+ case STATE_INACTIVE:
+ if (!ev.pulse)
+ break;
+
+ if (!eq_margin(ev.duration, SONY_HEADER_PULSE, SONY_UNIT / 2))
+ break;
+
+ data->count = 0;
+ data->state = STATE_HEADER_SPACE;
+ return 0;
+
+ case STATE_HEADER_SPACE:
+ if (ev.pulse)
+ break;
+
+ if (!eq_margin(ev.duration, SONY_HEADER_SPACE, SONY_UNIT / 2))
+ break;
+
+ data->state = STATE_BIT_PULSE;
+ return 0;
+
+ case STATE_BIT_PULSE:
+ if (!ev.pulse)
+ break;
+
+ data->sony_bits <<= 1;
+ if (eq_margin(ev.duration, SONY_BIT_1_PULSE, SONY_UNIT / 2))
+ data->sony_bits |= 1;
+ else if (!eq_margin(ev.duration, SONY_BIT_0_PULSE, SONY_UNIT / 2))
+ break;
+
+ data->count++;
+ data->state = STATE_BIT_SPACE;
+ return 0;
+
+ case STATE_BIT_SPACE:
+ if (ev.pulse)
+ break;
+
+ if (!geq_margin(ev.duration, SONY_BIT_SPACE, SONY_UNIT / 2))
+ break;
+
+ decrease_duration(&ev, SONY_BIT_SPACE);
+
+ if (!geq_margin(ev.duration, SONY_UNIT, SONY_UNIT / 2)) {
+ data->state = STATE_BIT_PULSE;
+ return 0;
+ }
+
+ data->state = STATE_FINISHED;
+ /* Fall through */
+
+ case STATE_FINISHED:
+ if (ev.pulse)
+ break;
+
+ if (!geq_margin(ev.duration, SONY_TRAILER_SPACE, SONY_UNIT / 2))
+ break;
+
+ switch (data->count) {
+ case 12:
+ device = bitrev8((data->sony_bits << 3) & 0xF8);
+ subdevice = 0;
+ function = bitrev8((data->sony_bits >> 4) & 0xFE);
+ break;
+ case 15:
+ device = bitrev8((data->sony_bits >> 0) & 0xFF);
+ subdevice = 0;
+ function = bitrev8((data->sony_bits >> 7) & 0xFD);
+ break;
+ case 20:
+ device = bitrev8((data->sony_bits >> 5) & 0xF8);
+ subdevice = bitrev8((data->sony_bits >> 0) & 0xFF);
+ function = bitrev8((data->sony_bits >> 12) & 0xFE);
+ break;
+ default:
+ IR_dprintk(1, "Sony invalid bitcount %u\n", data->count);
+ goto out;
+ }
+
+ scancode = device << 16 | subdevice << 8 | function;
+ IR_dprintk(1, "Sony(%u) scancode 0x%05x\n", data->count, scancode);
+ ir_keydown(input_dev, scancode, 0);
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+
+out:
+ IR_dprintk(1, "Sony decode failed at state %d (%uus %s)\n",
+ data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ data->state = STATE_INACTIVE;
+ return -EINVAL;
+}
+
+static int ir_sony_register(struct input_dev *input_dev)
+{
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ struct decoder_data *data;
+ int rc;
+
+ rc = sysfs_create_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+ if (rc < 0)
+ return rc;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+ return -ENOMEM;
+ }
+
+ data->ir_dev = ir_dev;
+ data->enabled = 1;
+
+ spin_lock(&decoder_lock);
+ list_add_tail(&data->list, &decoder_list);
+ spin_unlock(&decoder_lock);
+
+ return 0;
+}
+
+static int ir_sony_unregister(struct input_dev *input_dev)
+{
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ static struct decoder_data *data;
+
+ data = get_decoder_data(ir_dev);
+ if (!data)
+ return 0;
+
+ sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+
+ spin_lock(&decoder_lock);
+ list_del(&data->list);
+ spin_unlock(&decoder_lock);
+
+ return 0;
+}
+
+static struct ir_raw_handler sony_handler = {
+ .decode = ir_sony_decode,
+ .raw_register = ir_sony_register,
+ .raw_unregister = ir_sony_unregister,
+};
+
+static int __init ir_sony_decode_init(void)
+{
+ ir_raw_handler_register(&sony_handler);
+
+ printk(KERN_INFO "IR Sony protocol handler initialized\n");
+ return 0;
+}
+
+static void __exit ir_sony_decode_exit(void)
+{
+ ir_raw_handler_unregister(&sony_handler);
+}
+
+module_init(ir_sony_decode_init);
+module_exit(ir_sony_decode_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Härdeman <david@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Sony IR protocol decoder");
diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c
index 8e2751e..dfd45fa 100644
--- a/drivers/media/IR/ir-sysfs.c
+++ b/drivers/media/IR/ir-sysfs.c
@@ -64,6 +64,8 @@ static ssize_t show_protocol(struct device *d,
s = "rc6";
else if (ir_type == IR_TYPE_JVC)
s = "jvc";
+ else if (ir_type == IR_TYPE_SONY)
+ s = "sony";
else
s = "other";
@@ -103,6 +105,8 @@ static ssize_t store_protocol(struct device *d,
ir_type |= IR_TYPE_NEC;
if (!strcasecmp(buf, "jvc"))
ir_type |= IR_TYPE_JVC;
+ if (!strcasecmp(buf, "sony"))
+ ir_type |= IR_TYPE_SONY;
}
if (!ir_type) {
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 214f072..67af24e 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -17,6 +17,7 @@
#define IR_TYPE_NEC (1 << 2)
#define IR_TYPE_RC6 (1 << 3) /* Philips RC6 protocol */
#define IR_TYPE_JVC (1 << 4) /* JVC protocol */
+#define IR_TYPE_SONY (1 << 5) /* Sony12/15/20 protocol */
#define IR_TYPE_OTHER (1u << 31)
struct ir_scancode {
--
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