@@ -221,6 +221,7 @@ X!Isound/sound_firmware.c
<title>Media Devices</title>
<sect1><title>Video2Linux devices</title>
+!Iinclude/media/tuner.h
!Iinclude/media/v4l2-async.h
!Iinclude/media/v4l2-ctrls.h
!Iinclude/media/v4l2-dv-timings.h
@@ -166,33 +166,67 @@
#define TDA9887_GAIN_NORMAL (1<<20)
#define TDA9887_RIF_41_3 (1<<21) /* radio IF1 41.3 vs 33.3 */
+/**
+ * enum tuner_mode - Mode of the tuner
+ *
+ * @T_RADIO: Tuner core will work in radio mode
+ * @T_ANALOG_TV: Tuner core will work in analog TV mode
+ *
+ * Older boards only had a single tuner device, but some devices have a
+ * separate tuner for radio. In any case, the tuner-core needs to know if
+ * the tuner chip(s) will be used in radio mode or analog TV mode, as, on
+ * radio mode, frequencies are specified on a different range than on TV
+ * mode. This enum is used by the tuner core in order to work with the
+ * proper tuner range and eventually use a different tuner chip while in
+ * radio mode.
+ */
enum tuner_mode {
T_RADIO = 1 << V4L2_TUNER_RADIO,
T_ANALOG_TV = 1 << V4L2_TUNER_ANALOG_TV,
/* Don't need to map V4L2_TUNER_DIGITAL_TV, as tuner-core won't use it */
};
-/* Older boards only had a single tuner device. Nowadays multiple tuner
- devices may be present on a single board. Using TUNER_SET_TYPE_ADDR
- to pass the tuner_setup structure it is possible to setup each tuner
- device in turn.
-
- Since multiple devices may be present it is no longer sufficient to
- send a command to a single i2c device. Instead you should broadcast
- the command to all i2c devices.
-
- By setting the mode_mask correctly you can select which commands are
- accepted by a specific tuner device. For example, set mode_mask to
- T_RADIO if the device is a radio-only tuner. That specific tuner will
- only accept commands when the tuner is in radio mode and ignore them
- when the tuner is set to TV mode.
+/**
+ * struct tuner_setup - setup the tuner chipsets
+ *
+ * @addr: I2C address used to control the tuner device/chipset
+ * @type: Type of the tuner, as defined at the TUNER_* macros.
+ * Each different tuner model should have an unique
+ * identifier.
+ * @mode_mask: Mask with the allowed tuner modes: V4L2_TUNER_RADIO,
+ * V4L2_TUNER_ANALOG_TV and/or V4L2_TUNER_DIGITAL_TV,
+ * describing if the tuner should be used to support
+ * Radio, analog TV and/or digital TV.
+ * @config: Used to send tuner-specific configuration for complex
+ * tuners that require extra parameters to be set.
+ * Only a very few tuners require it and its usage on
+ * newer tuners should be avoided.
+ * @tuner_callback: Some tuners require to call back the bridge driver,
+ * in order to do some tasks like rising a GPIO at the
+ * bridge chipset, in order to do things like resetting
+ * the device.
+ *
+ * Older boards only had a single tuner device. Nowadays multiple tuner
+ * devices may be present on a single board. Using TUNER_SET_TYPE_ADDR
+ * to pass the tuner_setup structure it is possible to setup each tuner
+ * device in turn.
+ *
+ * Since multiple devices may be present it is no longer sufficient to
+ * send a command to a single i2c device. Instead you should broadcast
+ * the command to all i2c devices.
+ *
+ * By setting the mode_mask correctly you can select which commands are
+ * accepted by a specific tuner device. For example, set mode_mask to
+ * T_RADIO if the device is a radio-only tuner. That specific tuner will
+ * only accept commands when the tuner is in radio mode and ignore them
+ * when the tuner is set to TV mode.
*/
struct tuner_setup {
- unsigned short addr; /* I2C address */
- unsigned int type; /* Tuner type */
- unsigned int mode_mask; /* Allowed tuner modes */
- void *config; /* configuraion for more complex tuners */
+ unsigned short addr;
+ unsigned int type;
+ unsigned int mode_mask;
+ void *config;
int (*tuner_callback) (void *dev, int component, int cmd, int arg);
};
This is part of the V4L2 core, so its kABI should be documented at device-drivers DocBook. Add the meta-tags for that. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>