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 /* 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 /* These printk constructs can be used with v4l2_device and v4l2_subdev */
  61 #define v4l2_printk(level, dev, fmt, arg...) \
  62         printk(level "%s: " fmt, (dev)->name , ## arg)
  63
  64 #define v4l2_err(dev, fmt, arg...) \
  65         v4l2_printk(KERN_ERR, dev, fmt , ## arg)
  66
  67 #define v4l2_warn(dev, fmt, arg...) \
  68         v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
  69
  70 #define v4l2_info(dev, fmt, arg...) \
  71         v4l2_printk(KERN_INFO, dev, fmt , ## arg)
  72
  73 /* These three macros assume that the debug level is set with a module
  74    parameter called 'debug'. */
  75 #define v4l2_dbg(level, debug, dev, fmt, arg...)                        \
  76         do {                                                            \
  77                 if (debug >= (level))                                   \
  78                         v4l2_printk(KERN_DEBUG, dev, fmt , ## arg);     \
  79         } while (0)
  80
  81 /* ------------------------------------------------------------------------- */
  82
  83 /* Control helper functions */
  84
  85 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
  86                 const char * const *menu_items);
  87 const char *v4l2_ctrl_get_name(u32 id);
  88 const char * const *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_menu(struct v4l2_querymenu *qmenu,
  91                 struct v4l2_queryctrl *qctrl, const char * const *menu_items);
  92 #define V4L2_CTRL_MENU_IDS_END (0xffffffff)
  93 int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids);
  94
  95 /* Note: ctrl_classes points to an array of u32 pointers. Each u32 array is a
  96    0-terminated array of control IDs. Each array must be sorted low to high
  97    and belong to the same control class. The array of u32 pointers must also
  98    be sorted, from low class IDs to high class IDs. */
  99 u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
 100
 101 /* ------------------------------------------------------------------------- */
 102
 103 /* Register/chip ident helper function */
 104
 105 struct i2c_client; /* forward reference */
 106 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match);
 107 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
 108                 u32 ident, u32 revision);
 109 int v4l2_chip_match_host(const struct v4l2_dbg_match *match);
 110
 111 /* ------------------------------------------------------------------------- */
 112
 113 /* I2C Helper functions */
 114
 115 struct i2c_driver;
 116 struct i2c_adapter;
 117 struct i2c_client;
 118 struct i2c_device_id;
 119 struct v4l2_device;
 120 struct v4l2_subdev;
 121 struct v4l2_subdev_ops;
 122
 123
 124 /* Load an i2c module and return an initialized v4l2_subdev struct.
 125    The client_type argument is the name of the chip that's on the adapter. */
 126 struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
 127                 struct i2c_adapter *adapter, const char *client_type,
 128                 u8 addr, const unsigned short *probe_addrs);
 129
 130 struct i2c_board_info;
 131
 132 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
 133                 struct i2c_adapter *adapter, struct i2c_board_info *info,
 134                 const unsigned short *probe_addrs);
 135
 136 /* Initialize an v4l2_subdev with data from an i2c_client struct */
 137 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 138                 const struct v4l2_subdev_ops *ops);
 139 /* Return i2c client address of v4l2_subdev. */
 140 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
 141
 142 enum v4l2_i2c_tuner_type {
 143         ADDRS_RADIO,    /* Radio tuner addresses */
 144         ADDRS_DEMOD,    /* Demod tuner addresses */
 145         ADDRS_TV,       /* TV tuner addresses */
 146         /* TV tuner addresses if demod is present, this excludes
 147            addresses used by the demodulator from the list of
 148            candidates. */
 149         ADDRS_TV_WITH_DEMOD,
 150 };
 151 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
 152    addresses are unknown. */
 153 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
 154
 155 /* ------------------------------------------------------------------------- */
 156
 157 /* SPI Helper functions */
 158 #if defined(CONFIG_SPI)
 159
 160 #include <linux/spi/spi.h>
 161
 162 struct spi_device;
 163
 164 /* Load an spi module and return an initialized v4l2_subdev struct.
 165    The client_type argument is the name of the chip that's on the adapter. */
 166 struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
 167                 struct spi_master *master, struct spi_board_info *info);
 168
 169 /* Initialize an v4l2_subdev with data from an spi_device struct */
 170 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
 171                 const struct v4l2_subdev_ops *ops);
 172 #endif
 173
 174 /* ------------------------------------------------------------------------- */
 175
 176 /* Note: these remaining ioctls/structs should be removed as well, but they are
 177    still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and
 178    v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup
 179    is needed in those modules. */
 180
 181 /* s_config */
 182 struct v4l2_priv_tun_config {
 183         int tuner;
 184         void *priv;
 185 };
 186 #define TUNER_SET_CONFIG           _IOW('d', 92, struct v4l2_priv_tun_config)
 187
 188 #define VIDIOC_INT_RESET                _IOW ('d', 102, u32)
 189
 190 struct v4l2_routing {
 191         u32 input;
 192         u32 output;
 193 };
 194
 195 /* ------------------------------------------------------------------------- */
 196
 197 /* Miscellaneous helper functions */
 198
 199 void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
 200                            unsigned int wmax, unsigned int walign,
 201                            unsigned int *h, unsigned int hmin,
 202                            unsigned int hmax, unsigned int halign,
 203                            unsigned int salign);
 204 int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info);
 205
 206 struct v4l2_discrete_probe {
 207         const struct v4l2_frmsize_discrete      *sizes;
 208         int                                     num_sizes;
 209 };
 210
 211 const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
 212                 const struct v4l2_discrete_probe *probe,
 213                 s32 width, s32 height);
 214
 215 #endif /* V4L2_COMMON_H_ */