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_match_host(u32 id_type, u32 chip_id);
 102
 103 /* ------------------------------------------------------------------------- */
 104
 105 /* Internal ioctls */
 106
 107 /* VIDIOC_INT_DECODE_VBI_LINE */
 108 struct v4l2_decode_vbi_line {
 109         u32 is_second_field;    /* Set to 0 for the first (odd) field,
 110                                    set to 1 for the second (even) field. */
 111         u8 *p;                  /* Pointer to the sliced VBI data from the decoder.
 112                                    On exit points to the start of the payload. */
 113         u32 line;               /* Line number of the sliced VBI data (1-23) */
 114         u32 type;               /* VBI service type (V4L2_SLICED_*). 0 if no service found */
 115 };
 116
 117 /* VIDIOC_INT_G_CHIP_IDENT: identifies the actual chip installed on the board */
 118 enum v4l2_chip_ident {
 119         /* general idents: reserved range 0-49 */
 120         V4L2_IDENT_UNKNOWN = 0,
 121
 122         /* module saa7110: just ident= 100 */
 123         V4L2_IDENT_SAA7110 = 100,
 124
 125         /* module saa7111: just ident= 101 */
 126         V4L2_IDENT_SAA7111 = 101,
 127
 128         /* module saa7115: reserved range 102-149 */
 129         V4L2_IDENT_SAA7113 = 103,
 130         V4L2_IDENT_SAA7114 = 104,
 131         V4L2_IDENT_SAA7115 = 105,
 132         V4L2_IDENT_SAA7118 = 108,
 133
 134         /* module saa7127: reserved range 150-199 */
 135         V4L2_IDENT_SAA7127 = 157,
 136         V4L2_IDENT_SAA7129 = 159,
 137
 138         /* module cx25840: reserved range 200-249 */
 139         V4L2_IDENT_CX25836 = 236,
 140         V4L2_IDENT_CX25837 = 237,
 141         V4L2_IDENT_CX25840 = 240,
 142         V4L2_IDENT_CX25841 = 241,
 143         V4L2_IDENT_CX25842 = 242,
 144         V4L2_IDENT_CX25843 = 243,
 145
 146         /* OmniVision sensors - range 250-299 */
 147         V4L2_IDENT_OV7670 = 250,
 148 };
 149
 150 /* audio ioctls */
 151
 152 /* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
 153 #define AUDC_SET_RADIO        _IO('d',88)
 154
 155 /* tuner ioctls */
 156
 157 /* Sets tuner type and its I2C addr */
 158 #define TUNER_SET_TYPE_ADDR          _IOW('d', 90, int)
 159
 160 /* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
 161    by VIDIOC_INT_S_STANDBY. */
 162 #define TUNER_SET_STANDBY            _IOW('d', 91, int)
 163
 164 /* Sets tda9887 specific stuff, like port1, port2 and qss */
 165 #define TDA9887_SET_CONFIG           _IOW('d', 92, int)
 166
 167 /* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
 168 #define VIDIOC_INT_S_TUNER_MODE      _IOW('d', 93, enum v4l2_tuner_type)
 169
 170 /* Generic standby command. Passing -1 (all bits set to 1) will put the whole
 171    chip into standby mode, value 0 will make the chip fully active. Specific
 172    bits can be used by certain chips to enable/disable specific subsystems.
 173    Replacement of TUNER_SET_STANDBY. */
 174 #define VIDIOC_INT_S_STANDBY         _IOW('d', 94, u32)
 175
 176 /* 100, 101 used by  VIDIOC_DBG_[SG]_REGISTER */
 177
 178 /* Generic reset command. The argument selects which subsystems to reset.
 179    Passing 0 will always reset the whole chip. */
 180 #define VIDIOC_INT_RESET                _IOW ('d', 102, u32)
 181
 182 /* Set the frequency (in Hz) of the audio clock output.
 183    Used to slave an audio processor to the video decoder, ensuring that audio
 184    and video remain synchronized.
 185    Usual values for the frequency are 48000, 44100 or 32000 Hz.
 186    If the frequency is not supported, then -EINVAL is returned. */
 187 #define VIDIOC_INT_AUDIO_CLOCK_FREQ     _IOW ('d', 103, u32)
 188
 189 /* Video decoders that support sliced VBI need to implement this ioctl.
 190    Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
 191    data that was generated by the decoder. The driver then parses the sliced
 192    VBI data and sets the other fields in the struct accordingly. The pointer p
 193    is updated to point to the start of the payload which can be copied
 194    verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
 195    valid VBI data was found, then the type field is set to 0 on return. */
 196 #define VIDIOC_INT_DECODE_VBI_LINE      _IOWR('d', 104, struct v4l2_decode_vbi_line)
 197
 198 /* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
 199    filled with the data packets that should be output. Note that if you set
 200    the line field to 0, then that VBI signal is disabled. If no
 201    valid VBI data was found, then the type field is set to 0 on return. */
 202 #define VIDIOC_INT_S_VBI_DATA           _IOW ('d', 105, struct v4l2_sliced_vbi_data)
 203
 204 /* Used to obtain the sliced VBI packet from a readback register. Not all
 205    video decoders support this. If no data is available because the readback
 206    register contains invalid or erroneous data -EIO is returned. Note that
 207    you must fill in the 'id' member and the 'field' member (to determine
 208    whether CC data from the first or second field should be obtained). */
 209 #define VIDIOC_INT_G_VBI_DATA           _IOWR('d', 106, struct v4l2_sliced_vbi_data)
 210
 211 /* Returns the chip identifier or V4L2_IDENT_UNKNOWN if no identification can
 212    be made. */
 213 #define VIDIOC_INT_G_CHIP_IDENT         _IOR ('d', 107, enum v4l2_chip_ident)
 214
 215 /* Sets I2S speed in bps. This is used to provide a standard way to select I2S
 216    clock used by driving digital audio streams at some board designs.
 217    Usual values for the frequency are 1024000 and 2048000.
 218    If the frequency is not supported, then -EINVAL is returned. */
 219 #define VIDIOC_INT_I2S_CLOCK_FREQ       _IOW ('d', 108, u32)
 220
 221 /* Routing definition, device dependent. It specifies which inputs (if any)
 222    should be routed to which outputs (if any). */
 223 struct v4l2_routing {
 224         u32 input;
 225         u32 output;
 226 };
 227
 228 /* These internal commands should be used to define the inputs and outputs
 229    of an audio/video chip. They will replace the v4l2 API commands
 230    VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
 231    that are meant to be used by the user.
 232    The internal commands should be used to switch inputs/outputs
 233    because only the driver knows how to map a 'Television' input to the precise
 234    input/output routing of an A/D converter, or a DSP, or a video digitizer.
 235    These four commands should only be sent directly to an i2c device, they
 236    should not be broadcast as the routing is very device specific. */
 237 #define VIDIOC_INT_S_AUDIO_ROUTING      _IOW ('d', 109, struct v4l2_routing)
 238 #define VIDIOC_INT_G_AUDIO_ROUTING      _IOR ('d', 110, struct v4l2_routing)
 239 #define VIDIOC_INT_S_VIDEO_ROUTING      _IOW ('d', 111, struct v4l2_routing)
 240 #define VIDIOC_INT_G_VIDEO_ROUTING      _IOR ('d', 112, struct v4l2_routing)
 241
 242 struct v4l2_crystal_freq {
 243         u32 freq;       /* frequency in Hz of the crystal */
 244         u32 flags;      /* device specific flags */
 245 };
 246
 247 /* Sets the frequency of the crystal used to generate the clocks.
 248    An extra flags field allows device specific configuration regarding
 249    clock frequency dividers, etc. If not used, then set flags to 0.
 250    If the frequency is not supported, then -EINVAL is returned. */
 251 #define VIDIOC_INT_S_CRYSTAL_FREQ       _IOW ('d', 113, struct v4l2_crystal_freq)
 252
 253 /* Initialize the sensor registors to some sort of reasonable
 254    default values. */
 255 #define VIDIOC_INT_INIT                 _IOW ('d', 114, u32)
 256
 257 #endif /* V4L2_COMMON_H_ */