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 /* Common printk constucts for v4l-i2c drivers. These macros create a unique 32 prefix consisting of the driver name, the adapter number and the i2c 33 address. */ 34 #define v4l_printk(level, name, adapter, addr, fmt, arg...) \ 35 printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg) 36 37 #define v4l_client_printk(level, client, fmt, arg...) \ 38 v4l_printk(level, (client)->driver->driver.name, (client)->adapter, \ 39 (client)->addr, fmt , ## arg) 40 41 #define v4l_err(client, fmt, arg...) \ 42 v4l_client_printk(KERN_ERR, client, fmt , ## arg) 43 44 #define v4l_warn(client, fmt, arg...) \ 45 v4l_client_printk(KERN_WARNING, client, fmt , ## arg) 46 47 #define v4l_info(client, fmt, arg...) \ 48 v4l_client_printk(KERN_INFO, client, fmt , ## arg) 49 50 /* These three macros assume that the debug level is set with a module 51 parameter called 'debug'. */ 52 #define v4l_dbg(level, debug, client, fmt, arg...) \ 53 do { \ 54 if (debug >= (level)) \ 55 v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \ 56 } while (0) 57 58 /* ------------------------------------------------------------------------- */ 59 60 /* Priority helper functions */ 61 62 struct v4l2_prio_state { 63 atomic_t prios[4]; 64 }; 65 int v4l2_prio_init(struct v4l2_prio_state *global); 66 int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, 67 enum v4l2_priority new); 68 int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local); 69 int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local); 70 enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global); 71 int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local); 72 73 /* ------------------------------------------------------------------------- */ 74 75 /* Control helper functions */ 76 77 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, 78 const char **menu_items); 79 const char **v4l2_ctrl_get_menu(u32 id); 80 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def); 81 int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl); 82 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, 83 struct v4l2_queryctrl *qctrl, const char **menu_items); 84 u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id); 85 86 /* ------------------------------------------------------------------------- */ 87 88 /* Register/chip ident helper function */ 89 90 struct i2c_client; /* forward reference */ 91 int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 id_type, u32 chip_id); 92 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip, 93 u32 ident, u32 revision); 94 int v4l2_chip_match_host(u32 id_type, u32 chip_id); 95 96 /* ------------------------------------------------------------------------- */ 97 98 /* Helper function for I2C legacy drivers */ 99 100 struct i2c_driver; 101 struct i2c_adapter; 102 struct i2c_client; 103 struct i2c_device_id; 104 105 int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver, 106 const char *name, 107 int (*probe)(struct i2c_client *, const struct i2c_device_id *)); 108 109 /* ------------------------------------------------------------------------- */ 110 111 /* Internal ioctls */ 112 113 /* VIDIOC_INT_DECODE_VBI_LINE */ 114 struct v4l2_decode_vbi_line { 115 u32 is_second_field; /* Set to 0 for the first (odd) field, 116 set to 1 for the second (even) field. */ 117 u8 *p; /* Pointer to the sliced VBI data from the decoder. 118 On exit points to the start of the payload. */ 119 u32 line; /* Line number of the sliced VBI data (1-23) */ 120 u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */ 121 }; 122 123 struct v4l2_priv_tun_config { 124 int tuner; 125 void *priv; 126 }; 127 128 /* audio ioctls */ 129 130 /* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */ 131 #define AUDC_SET_RADIO _IO('d',88) 132 133 /* tuner ioctls */ 134 135 /* Sets tuner type and its I2C addr */ 136 #define TUNER_SET_TYPE_ADDR _IOW('d', 90, int) 137 138 /* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced 139 by VIDIOC_INT_S_STANDBY. */ 140 #define TUNER_SET_STANDBY _IOW('d', 91, int) 141 142 /* Sets tda9887 specific stuff, like port1, port2 and qss */ 143 #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config) 144 145 /* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */ 146 #define VIDIOC_INT_S_TUNER_MODE _IOW('d', 93, enum v4l2_tuner_type) 147 148 /* Generic standby command. Passing -1 (all bits set to 1) will put the whole 149 chip into standby mode, value 0 will make the chip fully active. Specific 150 bits can be used by certain chips to enable/disable specific subsystems. 151 Replacement of TUNER_SET_STANDBY. */ 152 #define VIDIOC_INT_S_STANDBY _IOW('d', 94, u32) 153 154 /* 100, 101 used by VIDIOC_DBG_[SG]_REGISTER */ 155 156 /* Generic reset command. The argument selects which subsystems to reset. 157 Passing 0 will always reset the whole chip. */ 158 #define VIDIOC_INT_RESET _IOW ('d', 102, u32) 159 160 /* Set the frequency (in Hz) of the audio clock output. 161 Used to slave an audio processor to the video decoder, ensuring that audio 162 and video remain synchronized. 163 Usual values for the frequency are 48000, 44100 or 32000 Hz. 164 If the frequency is not supported, then -EINVAL is returned. */ 165 #define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOW ('d', 103, u32) 166 167 /* Video decoders that support sliced VBI need to implement this ioctl. 168 Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI 169 data that was generated by the decoder. The driver then parses the sliced 170 VBI data and sets the other fields in the struct accordingly. The pointer p 171 is updated to point to the start of the payload which can be copied 172 verbatim into the data field of the v4l2_sliced_vbi_data struct. If no 173 valid VBI data was found, then the type field is set to 0 on return. */ 174 #define VIDIOC_INT_DECODE_VBI_LINE _IOWR('d', 104, struct v4l2_decode_vbi_line) 175 176 /* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is 177 filled with the data packets that should be output. Note that if you set 178 the line field to 0, then that VBI signal is disabled. If no 179 valid VBI data was found, then the type field is set to 0 on return. */ 180 #define VIDIOC_INT_S_VBI_DATA _IOW ('d', 105, struct v4l2_sliced_vbi_data) 181 182 /* Used to obtain the sliced VBI packet from a readback register. Not all 183 video decoders support this. If no data is available because the readback 184 register contains invalid or erroneous data -EIO is returned. Note that 185 you must fill in the 'id' member and the 'field' member (to determine 186 whether CC data from the first or second field should be obtained). */ 187 #define VIDIOC_INT_G_VBI_DATA _IOWR('d', 106, struct v4l2_sliced_vbi_data) 188 189 /* Sets I2S speed in bps. This is used to provide a standard way to select I2S 190 clock used by driving digital audio streams at some board designs. 191 Usual values for the frequency are 1024000 and 2048000. 192 If the frequency is not supported, then -EINVAL is returned. */ 193 #define VIDIOC_INT_I2S_CLOCK_FREQ _IOW ('d', 108, u32) 194 195 /* Routing definition, device dependent. It specifies which inputs (if any) 196 should be routed to which outputs (if any). */ 197 struct v4l2_routing { 198 u32 input; 199 u32 output; 200 }; 201 202 /* These internal commands should be used to define the inputs and outputs 203 of an audio/video chip. They will replace the v4l2 API commands 204 VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT 205 that are meant to be used by the user. 206 The internal commands should be used to switch inputs/outputs 207 because only the driver knows how to map a 'Television' input to the precise 208 input/output routing of an A/D converter, or a DSP, or a video digitizer. 209 These four commands should only be sent directly to an i2c device, they 210 should not be broadcast as the routing is very device specific. */ 211 #define VIDIOC_INT_S_AUDIO_ROUTING _IOW ('d', 109, struct v4l2_routing) 212 #define VIDIOC_INT_G_AUDIO_ROUTING _IOR ('d', 110, struct v4l2_routing) 213 #define VIDIOC_INT_S_VIDEO_ROUTING _IOW ('d', 111, struct v4l2_routing) 214 #define VIDIOC_INT_G_VIDEO_ROUTING _IOR ('d', 112, struct v4l2_routing) 215 216 struct v4l2_crystal_freq { 217 u32 freq; /* frequency in Hz of the crystal */ 218 u32 flags; /* device specific flags */ 219 }; 220 221 /* Sets the frequency of the crystal used to generate the clocks. 222 An extra flags field allows device specific configuration regarding 223 clock frequency dividers, etc. If not used, then set flags to 0. 224 If the frequency is not supported, then -EINVAL is returned. */ 225 #define VIDIOC_INT_S_CRYSTAL_FREQ _IOW ('d', 113, struct v4l2_crystal_freq) 226 227 /* Initialize the sensor registors to some sort of reasonable 228 default values. */ 229 #define VIDIOC_INT_INIT _IOW ('d', 114, u32) 230 231 /* Set v4l2_std_id for video OUTPUT devices. This is ignored by 232 video input devices. */ 233 #define VIDIOC_INT_S_STD_OUTPUT _IOW ('d', 115, v4l2_std_id) 234 235 /* Get v4l2_std_id for video OUTPUT devices. This is ignored by 236 video input devices. */ 237 #define VIDIOC_INT_G_STD_OUTPUT _IOW ('d', 116, v4l2_std_id) 238 239 #endif /* V4L2_COMMON_H_ */ 240