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 const s64 const *v4l2_ctrl_get_int_menu(u32 id, u32 *len); 90 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def); 91 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, 92 struct v4l2_queryctrl *qctrl, const char * const *menu_items); 93 #define V4L2_CTRL_MENU_IDS_END (0xffffffff) 94 int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids); 95 96 /* Note: ctrl_classes points to an array of u32 pointers. Each u32 array is a 97 0-terminated array of control IDs. Each array must be sorted low to high 98 and belong to the same control class. The array of u32 pointers must also 99 be sorted, from low class IDs to high class IDs. */ 100 u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id); 101 102 /* ------------------------------------------------------------------------- */ 103 104 /* I2C Helper functions */ 105 106 struct i2c_driver; 107 struct i2c_adapter; 108 struct i2c_client; 109 struct i2c_device_id; 110 struct v4l2_device; 111 struct v4l2_subdev; 112 struct v4l2_subdev_ops; 113 114 115 /* Load an i2c module and return an initialized v4l2_subdev struct. 116 The client_type argument is the name of the chip that's on the adapter. */ 117 struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, 118 struct i2c_adapter *adapter, const char *client_type, 119 u8 addr, const unsigned short *probe_addrs); 120 121 struct i2c_board_info; 122 123 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, 124 struct i2c_adapter *adapter, struct i2c_board_info *info, 125 const unsigned short *probe_addrs); 126 127 /* Initialize a v4l2_subdev with data from an i2c_client struct */ 128 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, 129 const struct v4l2_subdev_ops *ops); 130 /* Return i2c client address of v4l2_subdev. */ 131 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd); 132 133 enum v4l2_i2c_tuner_type { 134 ADDRS_RADIO, /* Radio tuner addresses */ 135 ADDRS_DEMOD, /* Demod tuner addresses */ 136 ADDRS_TV, /* TV tuner addresses */ 137 /* TV tuner addresses if demod is present, this excludes 138 addresses used by the demodulator from the list of 139 candidates. */ 140 ADDRS_TV_WITH_DEMOD, 141 }; 142 /* Return a list of I2C tuner addresses to probe. Use only if the tuner 143 addresses are unknown. */ 144 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type); 145 146 /* ------------------------------------------------------------------------- */ 147 148 /* SPI Helper functions */ 149 #if defined(CONFIG_SPI) 150 151 #include <linux/spi/spi.h> 152 153 struct spi_device; 154 155 /* Load an spi module and return an initialized v4l2_subdev struct. 156 The client_type argument is the name of the chip that's on the adapter. */ 157 struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, 158 struct spi_master *master, struct spi_board_info *info); 159 160 /* Initialize a v4l2_subdev with data from an spi_device struct */ 161 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, 162 const struct v4l2_subdev_ops *ops); 163 #endif 164 165 /* ------------------------------------------------------------------------- */ 166 167 /* Note: these remaining ioctls/structs should be removed as well, but they are 168 still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and 169 v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup 170 is needed in those modules. */ 171 172 /* s_config */ 173 struct v4l2_priv_tun_config { 174 int tuner; 175 void *priv; 176 }; 177 #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config) 178 179 #define VIDIOC_INT_RESET _IOW ('d', 102, u32) 180 181 struct v4l2_routing { 182 u32 input; 183 u32 output; 184 }; 185 186 /* ------------------------------------------------------------------------- */ 187 188 /* Miscellaneous helper functions */ 189 190 void v4l_bound_align_image(unsigned int *w, unsigned int wmin, 191 unsigned int wmax, unsigned int walign, 192 unsigned int *h, unsigned int hmin, 193 unsigned int hmax, unsigned int halign, 194 unsigned int salign); 195 196 struct v4l2_discrete_probe { 197 const struct v4l2_frmsize_discrete *sizes; 198 int num_sizes; 199 }; 200 201 const struct v4l2_frmsize_discrete *v4l2_find_nearest_format( 202 const struct v4l2_discrete_probe *probe, 203 s32 width, s32 height); 204 205 void v4l2_get_timestamp(struct timeval *tv); 206 207 #endif /* V4L2_COMMON_H_ */ 208