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Diffstat (limited to 'include/media/v4l2-common.h')
| -rw-r--r-- | include/media/v4l2-common.h | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h new file mode 100644 index 00000000000..1c7b259f341 --- /dev/null +++ b/include/media/v4l2-common.h @@ -0,0 +1,216 @@ +/* + v4l2 common internal API header + + This header contains internal shared ioctl definitions for use by the + internal low-level v4l2 drivers. + Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal + define, + + Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef V4L2_COMMON_H_ +#define V4L2_COMMON_H_ + +#include <media/v4l2-dev.h> + +/* Common printk constucts for v4l-i2c drivers. These macros create a unique + prefix consisting of the driver name, the adapter number and the i2c + address. */ +#define v4l_printk(level, name, adapter, addr, fmt, arg...) \ + printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg) + +#define v4l_client_printk(level, client, fmt, arg...) \ + v4l_printk(level, (client)->driver->driver.name, (client)->adapter, \ + (client)->addr, fmt , ## arg) + +#define v4l_err(client, fmt, arg...) \ + v4l_client_printk(KERN_ERR, client, fmt , ## arg) + +#define v4l_warn(client, fmt, arg...) \ + v4l_client_printk(KERN_WARNING, client, fmt , ## arg) + +#define v4l_info(client, fmt, arg...) \ + v4l_client_printk(KERN_INFO, client, fmt , ## arg) + +/* These three macros assume that the debug level is set with a module + parameter called 'debug'. */ +#define v4l_dbg(level, debug, client, fmt, arg...) \ + do { \ + if (debug >= (level)) \ + v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \ + } while (0) + +/* ------------------------------------------------------------------------- */ + +/* These printk constructs can be used with v4l2_device and v4l2_subdev */ +#define v4l2_printk(level, dev, fmt, arg...) \ + printk(level "%s: " fmt, (dev)->name , ## arg) + +#define v4l2_err(dev, fmt, arg...) \ + v4l2_printk(KERN_ERR, dev, fmt , ## arg) + +#define v4l2_warn(dev, fmt, arg...) \ + v4l2_printk(KERN_WARNING, dev, fmt , ## arg) + +#define v4l2_info(dev, fmt, arg...) \ + v4l2_printk(KERN_INFO, dev, fmt , ## arg) + +/* These three macros assume that the debug level is set with a module + parameter called 'debug'. */ +#define v4l2_dbg(level, debug, dev, fmt, arg...) \ + do { \ + if (debug >= (level)) \ + v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \ + } while (0) + +/* ------------------------------------------------------------------------- */ + +/* Priority helper functions */ + +struct v4l2_prio_state { + atomic_t prios[4]; +}; +int v4l2_prio_init(struct v4l2_prio_state *global); +int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, + enum v4l2_priority new); +int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local); +int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local); +enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global); +int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local); + +/* ------------------------------------------------------------------------- */ + +/* Control helper functions */ + +int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, + const char **menu_items); +const char *v4l2_ctrl_get_name(u32 id); +const char **v4l2_ctrl_get_menu(u32 id); +int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def); +int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, + struct v4l2_queryctrl *qctrl, const char **menu_items); +#define V4L2_CTRL_MENU_IDS_END (0xffffffff) +int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids); + +/* Note: ctrl_classes points to an array of u32 pointers. Each u32 array is a + 0-terminated array of control IDs. Each array must be sorted low to high + and belong to the same control class. The array of u32 pointers must also + be sorted, from low class IDs to high class IDs. */ +u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id); + +/* ------------------------------------------------------------------------- */ + +/* Register/chip ident helper function */ + +struct i2c_client; /* forward reference */ +int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match); +int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip, + u32 ident, u32 revision); +int v4l2_chip_match_host(const struct v4l2_dbg_match *match); + +/* ------------------------------------------------------------------------- */ + +/* I2C Helper functions */ + +struct i2c_driver; +struct i2c_adapter; +struct i2c_client; +struct i2c_device_id; +struct v4l2_device; +struct v4l2_subdev; +struct v4l2_subdev_ops; + + +/* Load an i2c module and return an initialized v4l2_subdev struct. + Only call request_module if module_name != NULL. + The client_type argument is the name of the chip that's on the adapter. */ +struct v4l2_subdev *v4l2_i2c_new_subdev_cfg(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, + const char *module_name, const char *client_type, + int irq, void *platform_data, + u8 addr, const unsigned short *probe_addrs); + +/* Load an i2c module and return an initialized v4l2_subdev struct. + Only call request_module if module_name != NULL. + The client_type argument is the name of the chip that's on the adapter. */ +static inline struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, + const char *module_name, const char *client_type, + u8 addr, const unsigned short *probe_addrs) +{ + return v4l2_i2c_new_subdev_cfg(v4l2_dev, adapter, module_name, + client_type, 0, NULL, addr, probe_addrs); +} + +struct i2c_board_info; + +struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, const char *module_name, + struct i2c_board_info *info, const unsigned short *probe_addrs); + +/* Initialize an v4l2_subdev with data from an i2c_client struct */ +void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, + const struct v4l2_subdev_ops *ops); +/* Return i2c client address of v4l2_subdev. */ +unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd); + +enum v4l2_i2c_tuner_type { + ADDRS_RADIO, /* Radio tuner addresses */ + ADDRS_DEMOD, /* Demod tuner addresses */ + ADDRS_TV, /* TV tuner addresses */ + /* TV tuner addresses if demod is present, this excludes + addresses used by the demodulator from the list of + candidates. */ + ADDRS_TV_WITH_DEMOD, +}; +/* Return a list of I2C tuner addresses to probe. Use only if the tuner + addresses are unknown. */ +const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type); + +/* ------------------------------------------------------------------------- */ + +/* Note: these remaining ioctls/structs should be removed as well, but they are + still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and + v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup + is needed in those modules. */ + +/* s_config */ +struct v4l2_priv_tun_config { + int tuner; + void *priv; +}; +#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config) + +#define VIDIOC_INT_RESET _IOW ('d', 102, u32) + +struct v4l2_routing { + u32 input; + u32 output; +}; + +/* ------------------------------------------------------------------------- */ + +/* Miscellaneous helper functions */ + +void v4l_bound_align_image(unsigned int *w, unsigned int wmin, + unsigned int wmax, unsigned int walign, + unsigned int *h, unsigned int hmin, + unsigned int hmax, unsigned int halign, + unsigned int salign); +int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info); +#endif /* V4L2_COMMON_H_ */ |