include/media/v4l2-common.h

   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
  29 #include <media/v4l2-dev.h>
  30
  31 /* v4l debugging and diagnostics */
  32
  33 /* Debug bitmask flags to be used on V4L2 */
  34 #define V4L2_DEBUG_IOCTL     0x01
  35 #define V4L2_DEBUG_IOCTL_ARG 0x02
  36
  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
  43 #define v4l_client_printk(level, client, fmt, arg...)                       \
  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'. */
  58 #define v4l_dbg(level, debug, client, fmt, arg...)                           \
  59         do {                                                                 \
  60                 if (debug >= (level))                                        \
  61                         v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
  62         } while (0)
  63
  64 /* Prints the ioctl in a human-readable format */
  65 extern void v4l_printk_ioctl(unsigned int cmd);
  66
  67 /* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
  68 #define v4l_print_ioctl(name, cmd)               \
  69         do {                                     \
  70                 printk(KERN_DEBUG "%s: ", name); \
  71                 v4l_printk_ioctl(cmd);           \
  72         } while (0)
  73
  74 /* Use this macro in I2C drivers where 'client' is the struct i2c_client
  75    pointer */
  76 #define v4l_i2c_print_ioctl(client, cmd)                   \
  77         do {                                               \
  78                 v4l_client_printk(KERN_DEBUG, client, ""); \
  79                 v4l_printk_ioctl(cmd);                     \
  80         } while (0)
  81
  82 /* ------------------------------------------------------------------------- */
  83
  84 /* Control helper functions */
  85
  86 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
  87                 const char **menu_items);
  88 const char **v4l2_ctrl_get_menu(u32 id);
  89 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
  90 int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl);
  91 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu,
  92                 struct v4l2_queryctrl *qctrl, const char **menu_items);
  93 u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
  94
  95 /* ------------------------------------------------------------------------- */
  96
  97 /* Register/chip ident helper function */
  98
  99 struct i2c_client; /* forward reference */
 100 int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 id_type, u32 chip_id);
 101 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip,
 102                 u32 ident, u32 revision);
 103 int v4l2_chip_match_host(u32 id_type, u32 chip_id);
 104
 105 /* ------------------------------------------------------------------------- */
 106
 107 /* Helper function for I2C legacy drivers */
 108
 109 struct i2c_driver;
 110 struct i2c_adapter;
 111 struct i2c_client;
 112
 113 int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
 114                 const char *name, int (*probe)(struct i2c_client *));
 115
 116 /* ------------------------------------------------------------------------- */
 117
 118 /* Internal ioctls */
 119
 120 /* VIDIOC_INT_DECODE_VBI_LINE */
 121 struct v4l2_decode_vbi_line {
 122         u32 is_second_field;    /* Set to 0 for the first (odd) field,
 123                                    set to 1 for the second (even) field. */
 124         u8 *p;                  /* Pointer to the sliced VBI data from the decoder.
 125                                    On exit points to the start of the payload. */
 126         u32 line;               /* Line number of the sliced VBI data (1-23) */
 127         u32 type;               /* VBI service type (V4L2_SLICED_*). 0 if no service found */
 128 };
 129
 130 struct v4l2_priv_tun_config {
 131         int tuner;
 132         void *priv;
 133 };
 134
 135 /* audio ioctls */
 136
 137 /* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
 138 #define AUDC_SET_RADIO        _IO('d',88)
 139
 140 /* tuner ioctls */
 141
 142 /* Sets tuner type and its I2C addr */
 143 #define TUNER_SET_TYPE_ADDR          _IOW('d', 90, int)
 144
 145 /* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
 146    by VIDIOC_INT_S_STANDBY. */
 147 #define TUNER_SET_STANDBY            _IOW('d', 91, int)
 148
 149 /* Sets tda9887 specific stuff, like port1, port2 and qss */
 150 #define TUNER_SET_CONFIG           _IOW('d', 92, struct v4l2_priv_tun_config)
 151
 152 /* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
 153 #define VIDIOC_INT_S_TUNER_MODE      _IOW('d', 93, enum v4l2_tuner_type)
 154
 155 /* Generic standby command. Passing -1 (all bits set to 1) will put the whole
 156    chip into standby mode, value 0 will make the chip fully active. Specific
 157    bits can be used by certain chips to enable/disable specific subsystems.
 158    Replacement of TUNER_SET_STANDBY. */
 159 #define VIDIOC_INT_S_STANDBY         _IOW('d', 94, u32)
 160
 161 /* 100, 101 used by  VIDIOC_DBG_[SG]_REGISTER */
 162
 163 /* Generic reset command. The argument selects which subsystems to reset.
 164    Passing 0 will always reset the whole chip. */
 165 #define VIDIOC_INT_RESET                _IOW ('d', 102, u32)
 166
 167 /* Set the frequency (in Hz) of the audio clock output.
 168    Used to slave an audio processor to the video decoder, ensuring that audio
 169    and video remain synchronized.
 170    Usual values for the frequency are 48000, 44100 or 32000 Hz.
 171    If the frequency is not supported, then -EINVAL is returned. */
 172 #define VIDIOC_INT_AUDIO_CLOCK_FREQ     _IOW ('d', 103, u32)
 173
 174 /* Video decoders that support sliced VBI need to implement this ioctl.
 175    Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
 176    data that was generated by the decoder. The driver then parses the sliced
 177    VBI data and sets the other fields in the struct accordingly. The pointer p
 178    is updated to point to the start of the payload which can be copied
 179    verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
 180    valid VBI data was found, then the type field is set to 0 on return. */
 181 #define VIDIOC_INT_DECODE_VBI_LINE      _IOWR('d', 104, struct v4l2_decode_vbi_line)
 182
 183 /* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
 184    filled with the data packets that should be output. Note that if you set
 185    the line field to 0, then that VBI signal is disabled. If no
 186    valid VBI data was found, then the type field is set to 0 on return. */
 187 #define VIDIOC_INT_S_VBI_DATA           _IOW ('d', 105, struct v4l2_sliced_vbi_data)
 188
 189 /* Used to obtain the sliced VBI packet from a readback register. Not all
 190    video decoders support this. If no data is available because the readback
 191    register contains invalid or erroneous data -EIO is returned. Note that
 192    you must fill in the 'id' member and the 'field' member (to determine
 193    whether CC data from the first or second field should be obtained). */
 194 #define VIDIOC_INT_G_VBI_DATA           _IOWR('d', 106, struct v4l2_sliced_vbi_data)
 195
 196 /* Sets I2S speed in bps. This is used to provide a standard way to select I2S
 197    clock used by driving digital audio streams at some board designs.
 198    Usual values for the frequency are 1024000 and 2048000.
 199    If the frequency is not supported, then -EINVAL is returned. */
 200 #define VIDIOC_INT_I2S_CLOCK_FREQ       _IOW ('d', 108, u32)
 201
 202 /* Routing definition, device dependent. It specifies which inputs (if any)
 203    should be routed to which outputs (if any). */
 204 struct v4l2_routing {
 205         u32 input;
 206         u32 output;
 207 };
 208
 209 /* These internal commands should be used to define the inputs and outputs
 210    of an audio/video chip. They will replace the v4l2 API commands
 211    VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
 212    that are meant to be used by the user.
 213    The internal commands should be used to switch inputs/outputs
 214    because only the driver knows how to map a 'Television' input to the precise
 215    input/output routing of an A/D converter, or a DSP, or a video digitizer.
 216    These four commands should only be sent directly to an i2c device, they
 217    should not be broadcast as the routing is very device specific. */
 218 #define VIDIOC_INT_S_AUDIO_ROUTING      _IOW ('d', 109, struct v4l2_routing)
 219 #define VIDIOC_INT_G_AUDIO_ROUTING      _IOR ('d', 110, struct v4l2_routing)
 220 #define VIDIOC_INT_S_VIDEO_ROUTING      _IOW ('d', 111, struct v4l2_routing)
 221 #define VIDIOC_INT_G_VIDEO_ROUTING      _IOR ('d', 112, struct v4l2_routing)
 222
 223 struct v4l2_crystal_freq {
 224         u32 freq;       /* frequency in Hz of the crystal */
 225         u32 flags;      /* device specific flags */
 226 };
 227
 228 /* Sets the frequency of the crystal used to generate the clocks.
 229    An extra flags field allows device specific configuration regarding
 230    clock frequency dividers, etc. If not used, then set flags to 0.
 231    If the frequency is not supported, then -EINVAL is returned. */
 232 #define VIDIOC_INT_S_CRYSTAL_FREQ       _IOW ('d', 113, struct v4l2_crystal_freq)
 233
 234 /* Initialize the sensor registors to some sort of reasonable
 235    default values. */
 236 #define VIDIOC_INT_INIT                 _IOW ('d', 114, u32)
 237
 238 /* Set v4l2_std_id for video OUTPUT devices. This is ignored by
 239    video input devices. */
 240 #define VIDIOC_INT_S_STD_OUTPUT         _IOW  ('d', 115, v4l2_std_id)
 241
 242 /* Get v4l2_std_id for video OUTPUT devices. This is ignored by
 243    video input devices. */
 244 #define VIDIOC_INT_G_STD_OUTPUT         _IOW  ('d', 116, v4l2_std_id)
 245
 246 #endif /* V4L2_COMMON_H_ */