[linux-2.6-block.git] / include / media / v4l2-common.h

/*
    v4l2 common internal API header

    This header contains internal shared ioctl definitions for use by the
    internal low-level v4l2 drivers.
    Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
    define,

    Copyright (C) 2005  Hans Verkuil <hverkuil@xs4all.nl>

    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; either version 2 of the License, or
    (at your option) any later version.

    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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef V4L2_COMMON_H_
#define V4L2_COMMON_H_

#include <media/v4l2-dev.h>

/* v4l debugging and diagnostics */

/* Debug bitmask flags to be used on V4L2 */
#define V4L2_DEBUG_IOCTL     0x01
#define V4L2_DEBUG_IOCTL_ARG 0x02

/* Common printk constucts for v4l-i2c drivers. These macros create a unique
   prefix consisting of the driver name, the adapter number and the i2c
   address. */
#define v4l_printk(level, name, adapter, addr, fmt, arg...) \
	printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)

#define v4l_client_printk(level, client, fmt, arg...)			    \
	v4l_printk(level, (client)->driver->driver.name, (client)->adapter, \
		   (client)->addr, fmt , ## arg)

#define v4l_err(client, fmt, arg...) \
	v4l_client_printk(KERN_ERR, client, fmt , ## arg)

#define v4l_warn(client, fmt, arg...) \
	v4l_client_printk(KERN_WARNING, client, fmt , ## arg)

#define v4l_info(client, fmt, arg...) \
	v4l_client_printk(KERN_INFO, client, fmt , ## arg)

/* These three macros assume that the debug level is set with a module
   parameter called 'debug'. */
#define v4l_dbg(level, debug, client, fmt, arg...)			     \
	do { 								     \
		if (debug >= (level))					     \
			v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
	} while (0)


/* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
#define v4l_print_ioctl(name, cmd)  		 \
	do {  					 \
		printk(KERN_DEBUG "%s: ", name); \
		v4l_printk_ioctl(cmd);		 \
	} while (0)

/* Use this macro in I2C drivers where 'client' is the struct i2c_client
   pointer */
#define v4l_i2c_print_ioctl(client, cmd) 		   \
	do {      					   \
		v4l_client_printk(KERN_DEBUG, client, ""); \
		v4l_printk_ioctl(cmd);			   \
	} while (0)

/* ------------------------------------------------------------------------- */

/* Control helper functions */

int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
		const char **menu_items);
const char **v4l2_ctrl_get_menu(u32 id);
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl);
int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu,
		struct v4l2_queryctrl *qctrl, const char **menu_items);
u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);

/* ------------------------------------------------------------------------- */

/* Register/chip ident helper function */

struct i2c_client; /* forward reference */
int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 id_type, u32 chip_id);
int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip,
		u32 ident, u32 revision);
int v4l2_chip_match_host(u32 id_type, u32 chip_id);

/* ------------------------------------------------------------------------- */

/* Helper function for I2C legacy drivers */

struct i2c_driver;
struct i2c_adapter;
struct i2c_client;

int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
		const char *name, int (*probe)(struct i2c_client *));

/* ------------------------------------------------------------------------- */

/* Internal ioctls */

/* VIDIOC_INT_DECODE_VBI_LINE */
struct v4l2_decode_vbi_line {
	u32 is_second_field;	/* Set to 0 for the first (odd) field,
				   set to 1 for the second (even) field. */
	u8 *p; 			/* Pointer to the sliced VBI data from the decoder.
				   On exit points to the start of the payload. */
	u32 line;		/* Line number of the sliced VBI data (1-23) */
	u32 type;		/* VBI service type (V4L2_SLICED_*). 0 if no service found */
};

struct v4l2_priv_tun_config {
	int tuner;
	void *priv;
};

/* audio ioctls */

/* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
#define AUDC_SET_RADIO        _IO('d',88)

/* tuner ioctls */

/* Sets tuner type and its I2C addr */
#define TUNER_SET_TYPE_ADDR          _IOW('d', 90, int)

/* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
   by VIDIOC_INT_S_STANDBY. */
#define TUNER_SET_STANDBY            _IOW('d', 91, int)

/* Sets tda9887 specific stuff, like port1, port2 and qss */
#define TUNER_SET_CONFIG           _IOW('d', 92, struct v4l2_priv_tun_config)

/* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
#define VIDIOC_INT_S_TUNER_MODE	     _IOW('d', 93, enum v4l2_tuner_type)

/* Generic standby command. Passing -1 (all bits set to 1) will put the whole
   chip into standby mode, value 0 will make the chip fully active. Specific
   bits can be used by certain chips to enable/disable specific subsystems.
   Replacement of TUNER_SET_STANDBY. */
#define VIDIOC_INT_S_STANDBY 	     _IOW('d', 94, u32)

/* 100, 101 used by  VIDIOC_DBG_[SG]_REGISTER */

/* Generic reset command. The argument selects which subsystems to reset.
   Passing 0 will always reset the whole chip. */
#define VIDIOC_INT_RESET            	_IOW ('d', 102, u32)

/* Set the frequency (in Hz) of the audio clock output.
   Used to slave an audio processor to the video decoder, ensuring that audio
   and video remain synchronized.
   Usual values for the frequency are 48000, 44100 or 32000 Hz.
   If the frequency is not supported, then -EINVAL is returned. */
#define VIDIOC_INT_AUDIO_CLOCK_FREQ 	_IOW ('d', 103, u32)

/* Video decoders that support sliced VBI need to implement this ioctl.
   Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
   data that was generated by the decoder. The driver then parses the sliced
   VBI data and sets the other fields in the struct accordingly. The pointer p
   is updated to point to the start of the payload which can be copied
   verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
   valid VBI data was found, then the type field is set to 0 on return. */
#define VIDIOC_INT_DECODE_VBI_LINE  	_IOWR('d', 104, struct v4l2_decode_vbi_line)

/* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
   filled with the data packets that should be output. Note that if you set
   the line field to 0, then that VBI signal is disabled. If no
   valid VBI data was found, then the type field is set to 0 on return. */
#define VIDIOC_INT_S_VBI_DATA 		_IOW ('d', 105, struct v4l2_sliced_vbi_data)

/* Used to obtain the sliced VBI packet from a readback register. Not all
   video decoders support this. If no data is available because the readback
   register contains invalid or erroneous data -EIO is returned. Note that
   you must fill in the 'id' member and the 'field' member (to determine
   whether CC data from the first or second field should be obtained). */
#define VIDIOC_INT_G_VBI_DATA 		_IOWR('d', 106, struct v4l2_sliced_vbi_data)

/* Sets I2S speed in bps. This is used to provide a standard way to select I2S
   clock used by driving digital audio streams at some board designs.
   Usual values for the frequency are 1024000 and 2048000.
   If the frequency is not supported, then -EINVAL is returned. */
#define VIDIOC_INT_I2S_CLOCK_FREQ 	_IOW ('d', 108, u32)

/* Routing definition, device dependent. It specifies which inputs (if any)
   should be routed to which outputs (if any). */
struct v4l2_routing {
	u32 input;
	u32 output;
};

/* These internal commands should be used to define the inputs and outputs
   of an audio/video chip. They will replace the v4l2 API commands
   VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
   that are meant to be used by the user.
   The internal commands should be used to switch inputs/outputs
   because only the driver knows how to map a 'Television' input to the precise
   input/output routing of an A/D converter, or a DSP, or a video digitizer.
   These four commands should only be sent directly to an i2c device, they
   should not be broadcast as the routing is very device specific. */
#define	VIDIOC_INT_S_AUDIO_ROUTING	_IOW ('d', 109, struct v4l2_routing)
#define	VIDIOC_INT_G_AUDIO_ROUTING	_IOR ('d', 110, struct v4l2_routing)
#define	VIDIOC_INT_S_VIDEO_ROUTING	_IOW ('d', 111, struct v4l2_routing)
#define	VIDIOC_INT_G_VIDEO_ROUTING	_IOR ('d', 112, struct v4l2_routing)

struct v4l2_crystal_freq {
	u32 freq;	/* frequency in Hz of the crystal */
	u32 flags; 	/* device specific flags */
};

/* Sets the frequency of the crystal used to generate the clocks.
   An extra flags field allows device specific configuration regarding
   clock frequency dividers, etc. If not used, then set flags to 0.
   If the frequency is not supported, then -EINVAL is returned. */
#define VIDIOC_INT_S_CRYSTAL_FREQ 	_IOW ('d', 113, struct v4l2_crystal_freq)

/* Initialize the sensor registors to some sort of reasonable
   default values. */
#define VIDIOC_INT_INIT			_IOW ('d', 114, u32)

/* Set v4l2_std_id for video OUTPUT devices. This is ignored by
   video input devices. */
#define VIDIOC_INT_S_STD_OUTPUT		_IOW  ('d', 115, v4l2_std_id)

/* Get v4l2_std_id for video OUTPUT devices. This is ignored by
   video input devices. */
#define VIDIOC_INT_G_STD_OUTPUT		_IOW  ('d', 116, v4l2_std_id)

#endif /* V4L2_COMMON_H_ */
Commit	Line	Data
b2f0648f HV	1	/*
	2	v4l2 common internal API header
	3
	4	This header contains internal shared ioctl definitions for use by the
	5	internal low-level v4l2 drivers.
	6	Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
	7	define,
	8
	9	Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
	10
	11	This program is free software; you can redistribute it and/or modify
	12	it under the terms of the GNU General Public License as published by
	13	the Free Software Foundation; either version 2 of the License, or
	14	(at your option) any later version.
	15
	16	This program is distributed in the hope that it will be useful,
	17	but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	GNU General Public License for more details.
	20
	21	You should have received a copy of the GNU General Public License
	22	along with this program; if not, write to the Free Software
	23	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	24	*/
	25
	26	#ifndef V4L2_COMMON_H_
	27	#define V4L2_COMMON_H_
	28
401998fa MCC	29	#include <media/v4l2-dev.h>
401998fa MCC	30
7e8b09ea HV	31	/* v4l debugging and diagnostics */
7e8b09ea HV	32
401998fa MCC	33	/* Debug bitmask flags to be used on V4L2 */
	34	#define V4L2_DEBUG_IOCTL 0x01
	35	#define V4L2_DEBUG_IOCTL_ARG 0x02
	36
7e8b09ea HV	37	/* Common printk constucts for v4l-i2c drivers. These macros create a unique
	38	prefix consisting of the driver name, the adapter number and the i2c
	39	address. */
	40	#define v4l_printk(level, name, adapter, addr, fmt, arg...) \
	41	printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)
	42
cab462f7	43	#define v4l_client_printk(level, client, fmt, arg...) \
7e8b09ea HV	44	v4l_printk(level, (client)->driver->driver.name, (client)->adapter, \
	45	(client)->addr, fmt , ## arg)
	46
	47	#define v4l_err(client, fmt, arg...) \
	48	v4l_client_printk(KERN_ERR, client, fmt , ## arg)
	49
	50	#define v4l_warn(client, fmt, arg...) \
	51	v4l_client_printk(KERN_WARNING, client, fmt , ## arg)
	52
	53	#define v4l_info(client, fmt, arg...) \
	54	v4l_client_printk(KERN_INFO, client, fmt , ## arg)
	55
	56	/* These three macros assume that the debug level is set with a module
	57	parameter called 'debug'. */
f167cb4e	58	#define v4l_dbg(level, debug, client, fmt, arg...) \
7e8b09ea HV	59	do { \
	60	if (debug >= (level)) \
	61	v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
	62	} while (0)
	63
7e8b09ea HV	64
	65	/* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
	66	#define v4l_print_ioctl(name, cmd) \
	67	do { \
	68	printk(KERN_DEBUG "%s: ", name); \
	69	v4l_printk_ioctl(cmd); \
	70	} while (0)
	71
	72	/* Use this macro in I2C drivers where 'client' is the struct i2c_client
	73	pointer */
	74	#define v4l_i2c_print_ioctl(client, cmd) \
	75	do { \
	76	v4l_client_printk(KERN_DEBUG, client, ""); \
	77	v4l_printk_ioctl(cmd); \
	78	} while (0)
	79
	80	/* ------------------------------------------------------------------------- */
	81
9cb2318b HV	82	/* Control helper functions */
	83
	84	int v4l2_ctrl_check(struct v4l2_ext_control ctrl, struct v4l2_queryctrl qctrl,
	85	const char **menu_items);
	86	const char **v4l2_ctrl_get_menu(u32 id);
	87	int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
	88	int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl);
	89	int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu,
	90	struct v4l2_queryctrl qctrl, const char *menu_items);
	91	u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
	92
	93	/* ------------------------------------------------------------------------- */
	94
f3d092b8 HV	95	/* Register/chip ident helper function */
	96
	97	struct i2c_client; /* forward reference */
	98	int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 id_type, u32 chip_id);
3434eb7e HV	99	int v4l2_chip_ident_i2c_client(struct i2c_client c, struct v4l2_chip_ident chip,
3434eb7e HV	100	u32 ident, u32 revision);
f3d092b8 HV	101	int v4l2_chip_match_host(u32 id_type, u32 chip_id);
	102
	103	/* ------------------------------------------------------------------------- */
	104
8ffbc655 HV	105	/* Helper function for I2C legacy drivers */
	106
	107	struct i2c_driver;
	108	struct i2c_adapter;
	109	struct i2c_client;
	110
	111	int v4l2_i2c_attach(struct i2c_adapter adapter, int address, struct i2c_driver driver,
	112	const char name, int (probe)(struct i2c_client *));
	113
	114	/* ------------------------------------------------------------------------- */
	115
7e8b09ea HV	116	/* Internal ioctls */
7e8b09ea HV	117
b2f0648f HV	118	/* VIDIOC_INT_DECODE_VBI_LINE */
	119	struct v4l2_decode_vbi_line {
	120	u32 is_second_field; /* Set to 0 for the first (odd) field,
	121	set to 1 for the second (even) field. */
	122	u8 p; / Pointer to the sliced VBI data from the decoder.
	123	On exit points to the start of the payload. */
	124	u32 line; /* Line number of the sliced VBI data (1-23) */
	125	u32 type; /* VBI service type (V4L2_SLICED_). 0 if no service found /
	126	};
	127
7f171123 MCC	128	struct v4l2_priv_tun_config {
	129	int tuner;
	130	void *priv;
	131	};
	132
5e453dc7	133	/* audio ioctls */
757d2505 HV	134
757d2505 HV	135	/* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
5e453dc7	136	#define AUDC_SET_RADIO _IO('d',88)
757d2505	137
5e453dc7	138	/* tuner ioctls */
757d2505	139
5e453dc7	140	/* Sets tuner type and its I2C addr */
757d2505 HV	141	#define TUNER_SET_TYPE_ADDR _IOW('d', 90, int)
	142
	143	/* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
	144	by VIDIOC_INT_S_STANDBY. */
	145	#define TUNER_SET_STANDBY _IOW('d', 91, int)
	146
5e453dc7	147	/* Sets tda9887 specific stuff, like port1, port2 and qss */
7f171123	148	#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
757d2505 HV	149
	150	/* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
	151	#define VIDIOC_INT_S_TUNER_MODE _IOW('d', 93, enum v4l2_tuner_type)
	152
	153	/* Generic standby command. Passing -1 (all bits set to 1) will put the whole
	154	chip into standby mode, value 0 will make the chip fully active. Specific
	155	bits can be used by certain chips to enable/disable specific subsystems.
	156	Replacement of TUNER_SET_STANDBY. */
	157	#define VIDIOC_INT_S_STANDBY _IOW('d', 94, u32)
5e453dc7	158
52ebc763	159	/* 100, 101 used by VIDIOC_DBG_[SG]_REGISTER */
b2f0648f	160
784e8fe4 HV	161	/* Generic reset command. The argument selects which subsystems to reset.
	162	Passing 0 will always reset the whole chip. */
	163	#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
b2f0648f	164
3578d3dd	165	/* Set the frequency (in Hz) of the audio clock output.
b2f0648f	166	Used to slave an audio processor to the video decoder, ensuring that audio
3578d3dd HV	167	and video remain synchronized.
	168	Usual values for the frequency are 48000, 44100 or 32000 Hz.
	169	If the frequency is not supported, then -EINVAL is returned. */
	170	#define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOW ('d', 103, u32)
b2f0648f HV	171
	172	/* Video decoders that support sliced VBI need to implement this ioctl.
	173	Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
	174	data that was generated by the decoder. The driver then parses the sliced
	175	VBI data and sets the other fields in the struct accordingly. The pointer p
	176	is updated to point to the start of the payload which can be copied
	177	verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
	178	valid VBI data was found, then the type field is set to 0 on return. */
	179	#define VIDIOC_INT_DECODE_VBI_LINE _IOWR('d', 104, struct v4l2_decode_vbi_line)
	180
	181	/* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
	182	filled with the data packets that should be output. Note that if you set
12db5607 MCC	183	the line field to 0, then that VBI signal is disabled. If no
12db5607 MCC	184	valid VBI data was found, then the type field is set to 0 on return. */
b2f0648f HV	185	#define VIDIOC_INT_S_VBI_DATA _IOW ('d', 105, struct v4l2_sliced_vbi_data)
	186
	187	/* Used to obtain the sliced VBI packet from a readback register. Not all
	188	video decoders support this. If no data is available because the readback
	189	register contains invalid or erroneous data -EIO is returned. Note that
	190	you must fill in the 'id' member and the 'field' member (to determine
	191	whether CC data from the first or second field should be obtained). */
41f38b43	192	#define VIDIOC_INT_G_VBI_DATA _IOWR('d', 106, struct v4l2_sliced_vbi_data)
b2f0648f	193
9bb13a6d MCC	194	/* Sets I2S speed in bps. This is used to provide a standard way to select I2S
	195	clock used by driving digital audio streams at some board designs.
	196	Usual values for the frequency are 1024000 and 2048000.
	197	If the frequency is not supported, then -EINVAL is returned. */
	198	#define VIDIOC_INT_I2S_CLOCK_FREQ _IOW ('d', 108, u32)
	199
757d2505 HV	200	/* Routing definition, device dependent. It specifies which inputs (if any)
	201	should be routed to which outputs (if any). */
	202	struct v4l2_routing {
	203	u32 input;
	204	u32 output;
	205	};
	206
	207	/* These internal commands should be used to define the inputs and outputs
8bf2f8e7 HV	208	of an audio/video chip. They will replace the v4l2 API commands
	209	VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
	210	that are meant to be used by the user.
	211	The internal commands should be used to switch inputs/outputs
757d2505 HV	212	because only the driver knows how to map a 'Television' input to the precise
	213	input/output routing of an A/D converter, or a DSP, or a video digitizer.
	214	These four commands should only be sent directly to an i2c device, they
	215	should not be broadcast as the routing is very device specific. */
	216	#define VIDIOC_INT_S_AUDIO_ROUTING _IOW ('d', 109, struct v4l2_routing)
41f38b43	217	#define VIDIOC_INT_G_AUDIO_ROUTING _IOR ('d', 110, struct v4l2_routing)
757d2505	218	#define VIDIOC_INT_S_VIDEO_ROUTING _IOW ('d', 111, struct v4l2_routing)
41f38b43	219	#define VIDIOC_INT_G_VIDEO_ROUTING _IOR ('d', 112, struct v4l2_routing)
757d2505	220
b7f8292c HV	221	struct v4l2_crystal_freq {
	222	u32 freq; /* frequency in Hz of the crystal */
	223	u32 flags; /* device specific flags */
	224	};
	225
	226	/* Sets the frequency of the crystal used to generate the clocks.
	227	An extra flags field allows device specific configuration regarding
	228	clock frequency dividers, etc. If not used, then set flags to 0.
	229	If the frequency is not supported, then -EINVAL is returned. */
	230	#define VIDIOC_INT_S_CRYSTAL_FREQ _IOW ('d', 113, struct v4l2_crystal_freq)
	231
9c4dfadb JC	232	/* Initialize the sensor registors to some sort of reasonable
	233	default values. */
	234	#define VIDIOC_INT_INIT _IOW ('d', 114, u32)
	235
045290b2 HV	236	/* Set v4l2_std_id for video OUTPUT devices. This is ignored by
	237	video input devices. */
	238	#define VIDIOC_INT_S_STD_OUTPUT _IOW ('d', 115, v4l2_std_id)
	239
	240	/* Get v4l2_std_id for video OUTPUT devices. This is ignored by
	241	video input devices. */
	242	#define VIDIOC_INT_G_STD_OUTPUT _IOW ('d', 116, v4l2_std_id)
	243
b2f0648f	244	#endif /* V4L2_COMMON_H_ */