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 /* I2C Helper functions */
 104
 105 struct i2c_driver;
 106 struct i2c_adapter;
 107 struct i2c_client;
 108 struct i2c_device_id;
 109 struct v4l2_device;
 110 struct v4l2_subdev;
 111 struct v4l2_subdev_ops;
 112
 113
 114 /* Load an i2c module and return an initialized v4l2_subdev struct.
 115    The client_type argument is the name of the chip that's on the adapter. */
 116 struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
 117                 struct i2c_adapter *adapter, const char *client_type,
 118                 u8 addr, const unsigned short *probe_addrs);
 119
 120 struct i2c_board_info;
 121
 122 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
 123                 struct i2c_adapter *adapter, struct i2c_board_info *info,
 124                 const unsigned short *probe_addrs);
 125
 126 /* Initialize a v4l2_subdev with data from an i2c_client struct */
 127 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 128                 const struct v4l2_subdev_ops *ops);
 129 /* Return i2c client address of v4l2_subdev. */
 130 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
 131
 132 enum v4l2_i2c_tuner_type {
 133         ADDRS_RADIO,    /* Radio tuner addresses */
 134         ADDRS_DEMOD,    /* Demod tuner addresses */
 135         ADDRS_TV,       /* TV tuner addresses */
 136         /* TV tuner addresses if demod is present, this excludes
 137            addresses used by the demodulator from the list of
 138            candidates. */
 139         ADDRS_TV_WITH_DEMOD,
 140 };
 141 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
 142    addresses are unknown. */
 143 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
 144
 145 /* ------------------------------------------------------------------------- */
 146
 147 /* SPI Helper functions */
 148 #if defined(CONFIG_SPI)
 149
 150 #include <linux/spi/spi.h>
 151
 152 struct spi_device;
 153
 154 /* Load an spi module and return an initialized v4l2_subdev struct.
 155    The client_type argument is the name of the chip that's on the adapter. */
 156 struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
 157                 struct spi_master *master, struct spi_board_info *info);
 158
 159 /* Initialize a v4l2_subdev with data from an spi_device struct */
 160 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
 161                 const struct v4l2_subdev_ops *ops);
 162 #endif
 163
 164 /* ------------------------------------------------------------------------- */
 165
 166 /* Note: these remaining ioctls/structs should be removed as well, but they are
 167    still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and
 168    v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup
 169    is needed in those modules. */
 170
 171 /* s_config */
 172 struct v4l2_priv_tun_config {
 173         int tuner;
 174         void *priv;
 175 };
 176 #define TUNER_SET_CONFIG           _IOW('d', 92, struct v4l2_priv_tun_config)
 177
 178 #define VIDIOC_INT_RESET                _IOW ('d', 102, u32)
 179
 180 struct v4l2_routing {
 181         u32 input;
 182         u32 output;
 183 };
 184
 185 /* ------------------------------------------------------------------------- */
 186
 187 /* Miscellaneous helper functions */
 188
 189 void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
 190                            unsigned int wmax, unsigned int walign,
 191                            unsigned int *h, unsigned int hmin,
 192                            unsigned int hmax, unsigned int halign,
 193                            unsigned int salign);
 194
 195 struct v4l2_discrete_probe {
 196         const struct v4l2_frmsize_discrete      *sizes;
 197         int                                     num_sizes;
 198 };
 199
 200 const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
 201                 const struct v4l2_discrete_probe *probe,
 202                 s32 width, s32 height);
 203
 204 bool v4l_match_dv_timings(const struct v4l2_dv_timings *t1,
 205                           const struct v4l2_dv_timings *t2,
 206                           unsigned pclock_delta);
 207
 208 bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
 209                 u32 polarities, struct v4l2_dv_timings *fmt);
 210
 211 bool v4l2_detect_gtf(unsigned frame_height, unsigned hfreq, unsigned vsync,
 212                 u32 polarities, struct v4l2_fract aspect,
 213                 struct v4l2_dv_timings *fmt);
 214
 215 struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait);
 216
 217 void v4l2_get_timestamp(struct timeval *tv);
 218
 219 #endif /* V4L2_COMMON_H_ */