a41231d52f
Currently, there's a mess at the V4L2 printk macros: some drivers use their own macros, others use pr_foo() or v4l_foo() macros, while more modern drivers use dev_foo() macros. The best is to get rid of v4l_foo() macros, as they can be replaced by either dev_foo() or pr_foo(). Yet, such change can be disruptive, as dev_foo() cannot use KERN_CONT. So, the best is to do such change driver by driver. There are replacements for most v4l_foo() macros, but it lacks a way to enable debug messages per level. So, add such macro, in order to make the conversion easier. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
268 lines
8.4 KiB
C
268 lines
8.4 KiB
C
/*
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v4l2 common internal API header
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This header contains internal shared ioctl definitions for use by the
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internal low-level v4l2 drivers.
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Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
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define,
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Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef V4L2_COMMON_H_
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#define V4L2_COMMON_H_
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#include <media/v4l2-dev.h>
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/* Common printk constucts for v4l-i2c drivers. These macros create a unique
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prefix consisting of the driver name, the adapter number and the i2c
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address. */
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#define v4l_printk(level, name, adapter, addr, fmt, arg...) \
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printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)
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#define v4l_client_printk(level, client, fmt, arg...) \
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v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \
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(client)->addr, fmt , ## arg)
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#define v4l_err(client, fmt, arg...) \
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v4l_client_printk(KERN_ERR, client, fmt , ## arg)
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#define v4l_warn(client, fmt, arg...) \
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v4l_client_printk(KERN_WARNING, client, fmt , ## arg)
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#define v4l_info(client, fmt, arg...) \
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v4l_client_printk(KERN_INFO, client, fmt , ## arg)
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/* These three macros assume that the debug level is set with a module
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parameter called 'debug'. */
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#define v4l_dbg(level, debug, client, fmt, arg...) \
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do { \
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if (debug >= (level)) \
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v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
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} while (0)
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/* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */
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#define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \
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do { \
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if (__debug >= (__level)) \
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dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \
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} while (0)
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/* ------------------------------------------------------------------------- */
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/* These printk constructs can be used with v4l2_device and v4l2_subdev */
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#define v4l2_printk(level, dev, fmt, arg...) \
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printk(level "%s: " fmt, (dev)->name , ## arg)
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#define v4l2_err(dev, fmt, arg...) \
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v4l2_printk(KERN_ERR, dev, fmt , ## arg)
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#define v4l2_warn(dev, fmt, arg...) \
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v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
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#define v4l2_info(dev, fmt, arg...) \
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v4l2_printk(KERN_INFO, dev, fmt , ## arg)
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/* These three macros assume that the debug level is set with a module
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parameter called 'debug'. */
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#define v4l2_dbg(level, debug, dev, fmt, arg...) \
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do { \
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if (debug >= (level)) \
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v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
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} while (0)
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/**
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* v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl
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*
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* @qctrl: pointer to the &struct v4l2_queryctrl to be filled
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* @min: minimum value for the control
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* @max: maximum value for the control
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* @step: control step
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* @def: default value for the control
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*
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* Fills the &struct v4l2_queryctrl fields for the query control.
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*
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* .. note::
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*
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* This function assumes that the @qctrl->id field is filled.
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*
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* Returns -EINVAL if the control is not known by the V4L2 core, 0 on success.
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*/
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int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
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s32 min, s32 max, s32 step, s32 def);
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/* ------------------------------------------------------------------------- */
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/* I2C Helper functions */
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struct i2c_driver;
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struct i2c_adapter;
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struct i2c_client;
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struct i2c_device_id;
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struct v4l2_device;
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struct v4l2_subdev;
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struct v4l2_subdev_ops;
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/**
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* v4l2_i2c_new_subdev - Load an i2c module and return an initialized
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* &struct v4l2_subdev.
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*
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* @v4l2_dev: pointer to &struct v4l2_device
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* @adapter: pointer to struct i2c_adapter
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* @client_type: name of the chip that's on the adapter.
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* @addr: I2C address. If zero, it will use @probe_addrs
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* @probe_addrs: array with a list of address. The last entry at such
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* array should be %I2C_CLIENT_END.
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*
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* returns a &struct v4l2_subdev pointer.
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*/
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struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, const char *client_type,
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u8 addr, const unsigned short *probe_addrs);
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struct i2c_board_info;
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/**
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* v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
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* &struct v4l2_subdev.
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*
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* @v4l2_dev: pointer to &struct v4l2_device
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* @adapter: pointer to struct i2c_adapter
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* @info: pointer to struct i2c_board_info used to replace the irq,
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* platform_data and addr arguments.
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* @probe_addrs: array with a list of address. The last entry at such
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* array should be %I2C_CLIENT_END.
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*
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* returns a &struct v4l2_subdev pointer.
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*/
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struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, struct i2c_board_info *info,
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const unsigned short *probe_addrs);
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/**
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* v4l2_i2c_subdev_init - Initializes a &struct v4l2_subdev with data from
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* an i2c_client struct.
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*
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* @sd: pointer to &struct v4l2_subdev
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* @client: pointer to struct i2c_client
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* @ops: pointer to &struct v4l2_subdev_ops
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*/
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void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
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const struct v4l2_subdev_ops *ops);
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/**
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* v4l2_i2c_subdev_addr - returns i2c client address of &struct v4l2_subdev.
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*
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* @sd: pointer to &struct v4l2_subdev
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*
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* Returns the address of an I2C sub-device
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*/
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unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
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enum v4l2_i2c_tuner_type {
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ADDRS_RADIO, /* Radio tuner addresses */
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ADDRS_DEMOD, /* Demod tuner addresses */
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ADDRS_TV, /* TV tuner addresses */
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/* TV tuner addresses if demod is present, this excludes
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addresses used by the demodulator from the list of
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candidates. */
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ADDRS_TV_WITH_DEMOD,
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};
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/* Return a list of I2C tuner addresses to probe. Use only if the tuner
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addresses are unknown. */
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const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
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/* ------------------------------------------------------------------------- */
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/* SPI Helper functions */
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#if defined(CONFIG_SPI)
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#include <linux/spi/spi.h>
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struct spi_device;
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/**
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* v4l2_spi_new_subdev - Load an spi module and return an initialized
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* &struct v4l2_subdev.
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*
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*
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* @v4l2_dev: pointer to &struct v4l2_device.
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* @master: pointer to struct spi_master.
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* @info: pointer to struct spi_board_info.
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*
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* returns a &struct v4l2_subdev pointer.
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*/
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struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
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struct spi_master *master, struct spi_board_info *info);
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/**
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* v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an
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* spi_device struct.
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*
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* @sd: pointer to &struct v4l2_subdev
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* @spi: pointer to struct spi_device.
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* @ops: pointer to &struct v4l2_subdev_ops
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*/
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void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
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const struct v4l2_subdev_ops *ops);
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#endif
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/* ------------------------------------------------------------------------- */
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/* Note: these remaining ioctls/structs should be removed as well, but they are
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still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and
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v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup
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is needed in those modules. */
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/* s_config */
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struct v4l2_priv_tun_config {
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int tuner;
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void *priv;
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};
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#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
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#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
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struct v4l2_routing {
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u32 input;
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u32 output;
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};
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/* ------------------------------------------------------------------------- */
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/* Miscellaneous helper functions */
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void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
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unsigned int wmax, unsigned int walign,
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unsigned int *h, unsigned int hmin,
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unsigned int hmax, unsigned int halign,
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unsigned int salign);
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struct v4l2_discrete_probe {
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const struct v4l2_frmsize_discrete *sizes;
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int num_sizes;
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};
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const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
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const struct v4l2_discrete_probe *probe,
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s32 width, s32 height);
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void v4l2_get_timestamp(struct timeval *tv);
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#endif /* V4L2_COMMON_H_ */
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