[media] DocBook: Document tveeprom.h

This header declares the code and structures used to parse
Hauppauge eeproms. As this is part of the V4L2 common, and
used by several drivers, let's properly document it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/device-drivers.tmpl

@@ -223,6 +223,7 @@ X!Isound/sound_firmware.c
      <sect1><title>Video2Linux devices</title>
 !Iinclude/media/tuner.h
 !Iinclude/media/tuner-types.h
+!Iinclude/media/tveeprom.h
 !Iinclude/media/v4l2-async.h
 !Iinclude/media/v4l2-ctrls.h
 !Iinclude/media/v4l2-dv-timings.h

include/media/tveeprom.h

+
 /*
+ * tveeprom - Contains structures and functions to work with Hauppauge
+ *	      eeproms.
  */
 
+#include <linux/if_ether.h>
+
+/**
+ * enum tveeprom_audio_processor - Specifies the type of audio processor
+ *				   used on a Hauppauge device.
+ *
+ * @TVEEPROM_AUDPROC_NONE:	No audio processor present
+ * @TVEEPROM_AUDPROC_INTERNAL:	The audio processor is internal to the
+ *				video processor
+ * @TVEEPROM_AUDPROC_MSP:	The audio processor is a MSPXXXX device
+ * @TVEEPROM_AUDPROC_OTHER:	The audio processor is another device
+ */
 enum tveeprom_audio_processor {
-	/* No audio processor present */
 	TVEEPROM_AUDPROC_NONE,
-	/* The audio processor is internal to the video processor */
 	TVEEPROM_AUDPROC_INTERNAL,
-	/* The audio processor is a MSPXXXX device */
 	TVEEPROM_AUDPROC_MSP,
-	/* The audio processor is another device */
 	TVEEPROM_AUDPROC_OTHER,
 };
 
-#include <linux/if_ether.h>
-
+/**
+ * struct tveeprom - Contains the fields parsed from Hauppauge eeproms
+ *
+ * @has_radio:			1 if the device has radio; 0 otherwise.
+ * @has_ir:			If has_ir == 0, then it is unknown what the IR
+ *				capabilities are. Otherwise:
+ *					bit 0) 1 (= IR capabilities are known);
+ *					bit 1) IR receiver present;
+ *					bit 2) IR transmitter (blaster) present.
+ * @has_MAC_address:		0: no MAC, 1: MAC present, 2: unknown.
+ * @tuner_type:			type of the tuner (TUNER_*, as defined at
+ *				include/media/tuner.h).
+ * @tuner_formats:		Supported analog TV standards (V4L2_STD_*).
+ * @tuner_hauppauge_model:	Hauppauge's code for the device model number.
+ * @tuner2_type:		type of the second tuner (TUNER_*, as defined
+ *				at include/media/tuner.h).
+ * @tuner2_formats:		Tuner 2 supported analog TV standards
+ *				(V4L2_STD_*).
+ * @tuner2_hauppauge_model:	tuner 2 Hauppauge's code for the device model
+ *				number.
+ * @audio_processor:		analog audio decoder, as defined by enum
+ *				tveeprom_audio_processor.
+ * @decoder_processor:		Hauppauge's code for the decoder chipset.
+ *				Unused by the drivers, as they probe the
+ *				decoder based on the PCI or USB ID.
+ * @model:			Hauppauge's model number
+ * @revision:			Card revision number
+ * @serial_number:		Card's serial number
+ * @rev_str:			Card revision converted to number
+ * @MAC_address:		MAC address for the network interface
+ */
 struct tveeprom {
 	u32 has_radio;
-	/* If has_ir == 0, then it is unknown what the IR capabilities are,
-	   otherwise:
-	   bit 0: 1 (= IR capabilities are known)
-	   bit 1: IR receiver present
-	   bit 2: IR transmitter (blaster) present */
 	u32 has_ir;
-	u32 has_MAC_address; /* 0: no MAC, 1: MAC present, 2: unknown */
+	u32 has_MAC_address;
 
 	u32 tuner_type;
 	u32 tuner_formats;
@@ -42,7 +77,28 @@ struct tveeprom {
 	u8 MAC_address[ETH_ALEN];
 };
 
+/**
+ * tveeprom_hauppauge_analog - Fill struct tveeprom using the contents
+ *			       of the eeprom previously filled at
+ *			       @eeprom_data field.
+ *
+ * @c:			I2C client struct
+ * @tvee:		Struct to where the eeprom parsed data will be filled;
+ * @eeprom_data:	Array with the contents of the eeprom_data. It should
+ *			contain 256 bytes filled with the contents of the
+ *			eeprom read from the Hauppauge device.
+ */
 void tveeprom_hauppauge_analog(struct i2c_client *c, struct tveeprom *tvee,
 			       unsigned char *eeprom_data);
 
+/**
+ * tveeprom_read - Reads the contents of the eeprom found at the Hauppauge
+ *		   devices.
+ *
+ * @c:		I2C client struct
+ * @eedata:	Array where the eeprom content will be stored.
+ * @len:	Size of @eedata array. If the eeprom content will be latter
+ *		be parsed by tveeprom_hauppauge_analog(), len should be, at
+ *		least, 256.
+ */
 int tveeprom_read(struct i2c_client *c, unsigned char *eedata, int len);