linux/include/media/v4l2-common.h
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   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
  85int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
  86                const char * const *menu_items);
  87const char *v4l2_ctrl_get_name(u32 id);
  88const char * const *v4l2_ctrl_get_menu(u32 id);
  89int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
  90int 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)
  93int 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. */
  99u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
 100
 101/* ------------------------------------------------------------------------- */
 102
 103/* Register/chip ident helper function */
 104
 105struct i2c_client; /* forward reference */
 106int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match);
 107int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
 108                u32 ident, u32 revision);
 109int v4l2_chip_match_host(const struct v4l2_dbg_match *match);
 110
 111/* ------------------------------------------------------------------------- */
 112
 113/* I2C Helper functions */
 114
 115struct i2c_driver;
 116struct i2c_adapter;
 117struct i2c_client;
 118struct i2c_device_id;
 119struct v4l2_device;
 120struct v4l2_subdev;
 121struct 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. */
 126struct 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
 130struct i2c_board_info;
 131
 132struct 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 */
 137void 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. */
 140unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
 141
 142enum 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. */
 153const 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
 162struct 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. */
 166struct 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 */
 170void 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 */
 182struct 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
 190struct v4l2_routing {
 191        u32 input;
 192        u32 output;
 193};
 194
 195/* ------------------------------------------------------------------------- */
 196
 197/* Miscellaneous helper functions */
 198
 199void 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);
 204int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info);
 205
 206struct v4l2_discrete_probe {
 207        const struct v4l2_frmsize_discrete      *sizes;
 208        int                                     num_sizes;
 209};
 210
 211const 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_ */
 216
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