[media] rc-core: add support for IR raw transmitters

IR raw transmitter driver type is specified in the enum
rc_driver_type as RC_DRIVER_IR_RAW_TX which includes all those
devices that transmit raw stream of bit to a receiver.

The data are provided by userspace applications, therefore they
don't need any input device allocation, but still they need to be
registered as raw devices.

Suggested-by: Sean Young <sean@mess.org>
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index c8c7ac7..075d7a9 100644 (file)
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1585,20 +1585,24 @@ struct rc_dev *rc_allocate_device(enum rc_driver_type type)
        if (!dev)
                return NULL;
 
-       dev->input_dev = input_allocate_device();
-       if (!dev->input_dev) {
-               kfree(dev);
-               return NULL;
-       }
+       if (type != RC_DRIVER_IR_RAW_TX) {
+               dev->input_dev = input_allocate_device();
+               if (!dev->input_dev) {
+                       kfree(dev);
+                       return NULL;
+               }
+
+               dev->input_dev->getkeycode = ir_getkeycode;
+               dev->input_dev->setkeycode = ir_setkeycode;
+               input_set_drvdata(dev->input_dev, dev);
 
-       dev->input_dev->getkeycode = ir_getkeycode;
-       dev->input_dev->setkeycode = ir_setkeycode;
-       input_set_drvdata(dev->input_dev, dev);
+               setup_timer(&dev->timer_keyup, ir_timer_keyup,
+                           (unsigned long)dev);
 
-       spin_lock_init(&dev->rc_map.lock);
-       spin_lock_init(&dev->keylock);
+               spin_lock_init(&dev->rc_map.lock);
+               spin_lock_init(&dev->keylock);
+       }
        mutex_init(&dev->lock);
-       setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev);
 
        dev->dev.type = &rc_dev_type;
        dev->dev.class = &rc_class;
@@ -1727,7 +1731,7 @@ out_table:
 
 static void rc_free_rx_device(struct rc_dev *dev)
 {
-       if (!dev)
+       if (!dev || dev->driver_type == RC_DRIVER_IR_RAW_TX)
                return;
 
        ir_free_table(&dev->rc_map);
@@ -1757,7 +1761,8 @@ int rc_register_device(struct rc_dev *dev)
        atomic_set(&dev->initialized, 0);
 
        dev->dev.groups = dev->sysfs_groups;
-       dev->sysfs_groups[attr++] = &rc_dev_protocol_attr_grp;
+       if (dev->driver_type != RC_DRIVER_IR_RAW_TX)
+               dev->sysfs_groups[attr++] = &rc_dev_protocol_attr_grp;
        if (dev->s_filter)
                dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp;
        if (dev->s_wakeup_filter)
@@ -1773,11 +1778,14 @@ int rc_register_device(struct rc_dev *dev)
                dev->input_name ?: "Unspecified device", path ?: "N/A");
        kfree(path);
 
-       rc = rc_setup_rx_device(dev);
-       if (rc)
-               goto out_dev;
+       if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
+               rc = rc_setup_rx_device(dev);
+               if (rc)
+                       goto out_dev;
+       }
 
-       if (dev->driver_type == RC_DRIVER_IR_RAW) {
+       if (dev->driver_type == RC_DRIVER_IR_RAW ||
+           dev->driver_type == RC_DRIVER_IR_RAW_TX) {
                if (!raw_init) {
                        request_module_nowait("ir-lirc-codec");
                        raw_init = true;

diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 8c22526..73ddd72 100644 (file)
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -32,13 +32,16 @@ do {                                                                \
 /**
  * enum rc_driver_type - type of the RC output
  *
- * @RC_DRIVER_SCANCODE:        Driver or hardware generates a scancode
- * @RC_DRIVER_IR_RAW:  Driver or hardware generates pulse/space sequences.
- *                     It needs a Infra-Red pulse/space decoder
+ * @RC_DRIVER_SCANCODE:         Driver or hardware generates a scancode
+ * @RC_DRIVER_IR_RAW:   Driver or hardware generates pulse/space sequences.
+ *                      It needs a Infra-Red pulse/space decoder
+ * @RC_DRIVER_IR_RAW_TX: Device transmitter only,
+ *                      driver requires pulse/space data sequence.
  */
 enum rc_driver_type {
        RC_DRIVER_SCANCODE = 0,
        RC_DRIVER_IR_RAW,
+       RC_DRIVER_IR_RAW_TX,
 };
 
 /**