1074 lines
33 KiB
C
1074 lines
33 KiB
C
/*
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* Video for Linux Two
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* This file replaces the videodev.c file that comes with the
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* regular kernel distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Bill Dirks <bill@thedirks.org>
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* based on code by Alan Cox, <alan@cymru.net>
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*
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*/
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/*
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* Video capture interface for Linux
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Alan Cox, <alan@lxorguk.ukuu.org.uk>
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*
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* Fixes:
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*/
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/*
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* Video4linux 1/2 integration by Justin Schoeman
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* <justin@suntiger.ee.up.ac.za>
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* 2.4 PROCFS support ported from 2.4 kernels by
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* Iñaki García Etxebarria <garetxe@euskalnet.net>
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* Makefile fix by "W. Michael Petullo" <mike@flyn.org>
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* 2.4 devfs support ported from 2.4 kernels by
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* Dan Merillat <dan@merillat.org>
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* Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/i2c.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <asm/div64.h>
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#define __OLD_VIDIOC_ /* To allow fixing old calls*/
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <linux/videodev2.h>
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MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
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MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
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MODULE_LICENSE("GPL");
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/*
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*
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* V 4 L 2 D R I V E R H E L P E R A P I
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*
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*/
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/*
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* Video Standard Operations (contributed by Michael Schimek)
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*/
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/* ----------------------------------------------------------------- */
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/* priority handling */
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#define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \
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val == V4L2_PRIORITY_INTERACTIVE || \
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val == V4L2_PRIORITY_RECORD)
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int v4l2_prio_init(struct v4l2_prio_state *global)
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{
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memset(global,0,sizeof(*global));
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_init);
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int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
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enum v4l2_priority new)
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{
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if (!V4L2_PRIO_VALID(new))
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return -EINVAL;
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if (*local == new)
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return 0;
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atomic_inc(&global->prios[new]);
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if (V4L2_PRIO_VALID(*local))
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atomic_dec(&global->prios[*local]);
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*local = new;
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_change);
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int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT);
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}
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EXPORT_SYMBOL(v4l2_prio_open);
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int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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if (V4L2_PRIO_VALID(*local))
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atomic_dec(&global->prios[*local]);
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_close);
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enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
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{
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if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
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return V4L2_PRIORITY_RECORD;
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if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
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return V4L2_PRIORITY_INTERACTIVE;
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if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
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return V4L2_PRIORITY_BACKGROUND;
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return V4L2_PRIORITY_UNSET;
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}
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EXPORT_SYMBOL(v4l2_prio_max);
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int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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if (*local < v4l2_prio_max(global))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_check);
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/* ----------------------------------------------------------------- */
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/* Helper functions for control handling */
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/* Check for correctness of the ctrl's value based on the data from
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struct v4l2_queryctrl and the available menu items. Note that
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menu_items may be NULL, in that case it is ignored. */
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int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
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const char **menu_items)
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{
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if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
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return -EINVAL;
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if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
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return -EBUSY;
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if (qctrl->type == V4L2_CTRL_TYPE_STRING)
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return 0;
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if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
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qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
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qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
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return 0;
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if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
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return -ERANGE;
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if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
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if (menu_items[ctrl->value] == NULL ||
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menu_items[ctrl->value][0] == '\0')
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL(v4l2_ctrl_check);
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/* Returns NULL or a character pointer array containing the menu for
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the given control ID. The pointer array ends with a NULL pointer.
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An empty string signifies a menu entry that is invalid. This allows
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drivers to disable certain options if it is not supported. */
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const char **v4l2_ctrl_get_menu(u32 id)
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{
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static const char *mpeg_audio_sampling_freq[] = {
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"44.1 kHz",
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"48 kHz",
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"32 kHz",
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NULL
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};
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static const char *mpeg_audio_encoding[] = {
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"MPEG-1/2 Layer I",
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"MPEG-1/2 Layer II",
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"MPEG-1/2 Layer III",
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"MPEG-2/4 AAC",
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"AC-3",
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NULL
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};
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static const char *mpeg_audio_l1_bitrate[] = {
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"32 kbps",
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"64 kbps",
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"96 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"288 kbps",
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"320 kbps",
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"352 kbps",
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"384 kbps",
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"416 kbps",
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"448 kbps",
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NULL
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};
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static const char *mpeg_audio_l2_bitrate[] = {
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"32 kbps",
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"48 kbps",
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"56 kbps",
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"64 kbps",
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"80 kbps",
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"96 kbps",
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"112 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"320 kbps",
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"384 kbps",
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NULL
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};
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static const char *mpeg_audio_l3_bitrate[] = {
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"32 kbps",
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"40 kbps",
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"48 kbps",
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"56 kbps",
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"64 kbps",
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"80 kbps",
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"96 kbps",
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"112 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"320 kbps",
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NULL
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};
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static const char *mpeg_audio_ac3_bitrate[] = {
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"32 kbps",
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"40 kbps",
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"48 kbps",
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"56 kbps",
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"64 kbps",
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"80 kbps",
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"96 kbps",
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"112 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"320 kbps",
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"384 kbps",
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"448 kbps",
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"512 kbps",
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"576 kbps",
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"640 kbps",
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NULL
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};
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static const char *mpeg_audio_mode[] = {
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"Stereo",
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"Joint Stereo",
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"Dual",
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"Mono",
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NULL
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};
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static const char *mpeg_audio_mode_extension[] = {
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"Bound 4",
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"Bound 8",
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"Bound 12",
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"Bound 16",
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NULL
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};
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static const char *mpeg_audio_emphasis[] = {
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"No Emphasis",
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"50/15 us",
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"CCITT J17",
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NULL
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};
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static const char *mpeg_audio_crc[] = {
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"No CRC",
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"16-bit CRC",
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NULL
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};
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static const char *mpeg_video_encoding[] = {
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"MPEG-1",
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"MPEG-2",
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"MPEG-4 AVC",
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NULL
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};
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static const char *mpeg_video_aspect[] = {
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"1x1",
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"4x3",
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"16x9",
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"2.21x1",
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NULL
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};
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static const char *mpeg_video_bitrate_mode[] = {
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"Variable Bitrate",
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"Constant Bitrate",
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NULL
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};
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static const char *mpeg_stream_type[] = {
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"MPEG-2 Program Stream",
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"MPEG-2 Transport Stream",
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"MPEG-1 System Stream",
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"MPEG-2 DVD-compatible Stream",
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"MPEG-1 VCD-compatible Stream",
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"MPEG-2 SVCD-compatible Stream",
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NULL
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};
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static const char *mpeg_stream_vbi_fmt[] = {
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"No VBI",
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"Private packet, IVTV format",
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NULL
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};
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static const char *camera_power_line_frequency[] = {
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"Disabled",
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"50 Hz",
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"60 Hz",
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NULL
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};
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static const char *camera_exposure_auto[] = {
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"Auto Mode",
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"Manual Mode",
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"Shutter Priority Mode",
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"Aperture Priority Mode",
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NULL
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};
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static const char *colorfx[] = {
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"None",
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"Black & White",
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"Sepia",
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NULL
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};
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static const char *tune_preemphasis[] = {
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"No preemphasis",
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"50 useconds",
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"75 useconds",
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NULL,
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};
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switch (id) {
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
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return mpeg_audio_sampling_freq;
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case V4L2_CID_MPEG_AUDIO_ENCODING:
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return mpeg_audio_encoding;
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case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
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return mpeg_audio_l1_bitrate;
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case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
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return mpeg_audio_l2_bitrate;
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case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
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return mpeg_audio_l3_bitrate;
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case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
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return mpeg_audio_ac3_bitrate;
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case V4L2_CID_MPEG_AUDIO_MODE:
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return mpeg_audio_mode;
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case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
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return mpeg_audio_mode_extension;
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case V4L2_CID_MPEG_AUDIO_EMPHASIS:
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return mpeg_audio_emphasis;
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case V4L2_CID_MPEG_AUDIO_CRC:
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return mpeg_audio_crc;
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case V4L2_CID_MPEG_VIDEO_ENCODING:
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return mpeg_video_encoding;
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case V4L2_CID_MPEG_VIDEO_ASPECT:
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return mpeg_video_aspect;
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case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
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return mpeg_video_bitrate_mode;
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case V4L2_CID_MPEG_STREAM_TYPE:
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return mpeg_stream_type;
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case V4L2_CID_MPEG_STREAM_VBI_FMT:
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return mpeg_stream_vbi_fmt;
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case V4L2_CID_POWER_LINE_FREQUENCY:
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return camera_power_line_frequency;
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case V4L2_CID_EXPOSURE_AUTO:
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return camera_exposure_auto;
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case V4L2_CID_COLORFX:
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return colorfx;
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case V4L2_CID_TUNE_PREEMPHASIS:
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return tune_preemphasis;
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default:
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return NULL;
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}
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}
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EXPORT_SYMBOL(v4l2_ctrl_get_menu);
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/* Return the control name. */
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const char *v4l2_ctrl_get_name(u32 id)
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{
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switch (id) {
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/* USER controls */
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case V4L2_CID_USER_CLASS: return "User Controls";
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case V4L2_CID_BRIGHTNESS: return "Brightness";
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case V4L2_CID_CONTRAST: return "Contrast";
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case V4L2_CID_SATURATION: return "Saturation";
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case V4L2_CID_HUE: return "Hue";
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case V4L2_CID_AUDIO_VOLUME: return "Volume";
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case V4L2_CID_AUDIO_BALANCE: return "Balance";
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case V4L2_CID_AUDIO_BASS: return "Bass";
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case V4L2_CID_AUDIO_TREBLE: return "Treble";
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case V4L2_CID_AUDIO_MUTE: return "Mute";
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case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
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case V4L2_CID_BLACK_LEVEL: return "Black Level";
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case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
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case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
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case V4L2_CID_RED_BALANCE: return "Red Balance";
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case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
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case V4L2_CID_GAMMA: return "Gamma";
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case V4L2_CID_EXPOSURE: return "Exposure";
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case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
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case V4L2_CID_GAIN: return "Gain";
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case V4L2_CID_HFLIP: return "Horizontal Flip";
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case V4L2_CID_VFLIP: return "Vertical Flip";
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case V4L2_CID_HCENTER: return "Horizontal Center";
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case V4L2_CID_VCENTER: return "Vertical Center";
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case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
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case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
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case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
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case V4L2_CID_SHARPNESS: return "Sharpness";
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case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
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case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
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case V4L2_CID_COLOR_KILLER: return "Color Killer";
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case V4L2_CID_COLORFX: return "Color Effects";
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case V4L2_CID_ROTATE: return "Rotate";
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case V4L2_CID_BG_COLOR: return "Background color";
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/* MPEG controls */
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case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
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case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
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case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
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case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
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case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
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case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
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case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
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case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
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case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
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case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
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case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
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case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
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case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
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case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
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case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
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case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
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case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
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|
case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
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|
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
|
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case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
|
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case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
|
|
case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
|
|
case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
|
|
case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
|
|
case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
|
|
case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
|
|
case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
|
|
case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
|
|
case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
|
|
case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
|
|
case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
|
|
case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
|
|
|
|
/* CAMERA controls */
|
|
case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
|
|
case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
|
|
case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
|
|
case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
|
|
case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
|
|
case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
|
|
case V4L2_CID_PAN_RESET: return "Pan, Reset";
|
|
case V4L2_CID_TILT_RESET: return "Tilt, Reset";
|
|
case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
|
|
case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
|
|
case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
|
|
case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
|
|
case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic";
|
|
case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
|
|
case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
|
|
case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
|
|
case V4L2_CID_PRIVACY: return "Privacy";
|
|
|
|
/* FM Radio Modulator control */
|
|
case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
|
|
case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
|
|
case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
|
|
case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
|
|
case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
|
|
case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
|
|
case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
|
|
case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
|
|
case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
|
|
case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Feature Enabled";
|
|
case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
|
|
case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
|
|
case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
|
|
case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
|
|
case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
|
|
case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
|
|
case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
|
|
case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-emphasis settings";
|
|
case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
|
|
case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_get_name);
|
|
|
|
/* Fill in a struct v4l2_queryctrl */
|
|
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
|
|
{
|
|
const char *name = v4l2_ctrl_get_name(qctrl->id);
|
|
|
|
qctrl->flags = 0;
|
|
if (name == NULL)
|
|
return -EINVAL;
|
|
|
|
switch (qctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
case V4L2_CID_AUDIO_LOUDNESS:
|
|
case V4L2_CID_AUTO_WHITE_BALANCE:
|
|
case V4L2_CID_AUTOGAIN:
|
|
case V4L2_CID_HFLIP:
|
|
case V4L2_CID_VFLIP:
|
|
case V4L2_CID_HUE_AUTO:
|
|
case V4L2_CID_CHROMA_AGC:
|
|
case V4L2_CID_COLOR_KILLER:
|
|
case V4L2_CID_MPEG_AUDIO_MUTE:
|
|
case V4L2_CID_MPEG_VIDEO_MUTE:
|
|
case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
|
|
case V4L2_CID_MPEG_VIDEO_PULLDOWN:
|
|
case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
|
|
case V4L2_CID_FOCUS_AUTO:
|
|
case V4L2_CID_PRIVACY:
|
|
case V4L2_CID_AUDIO_LIMITER_ENABLED:
|
|
case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
|
|
case V4L2_CID_PILOT_TONE_ENABLED:
|
|
qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
|
|
min = 0;
|
|
max = step = 1;
|
|
break;
|
|
case V4L2_CID_PAN_RESET:
|
|
case V4L2_CID_TILT_RESET:
|
|
qctrl->type = V4L2_CTRL_TYPE_BUTTON;
|
|
qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
|
|
min = max = step = def = 0;
|
|
break;
|
|
case V4L2_CID_POWER_LINE_FREQUENCY:
|
|
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
|
|
case V4L2_CID_MPEG_AUDIO_ENCODING:
|
|
case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
|
|
case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
|
|
case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
|
|
case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
|
|
case V4L2_CID_MPEG_AUDIO_MODE:
|
|
case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
|
|
case V4L2_CID_MPEG_AUDIO_EMPHASIS:
|
|
case V4L2_CID_MPEG_AUDIO_CRC:
|
|
case V4L2_CID_MPEG_VIDEO_ENCODING:
|
|
case V4L2_CID_MPEG_VIDEO_ASPECT:
|
|
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
|
|
case V4L2_CID_MPEG_STREAM_TYPE:
|
|
case V4L2_CID_MPEG_STREAM_VBI_FMT:
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
case V4L2_CID_COLORFX:
|
|
case V4L2_CID_TUNE_PREEMPHASIS:
|
|
qctrl->type = V4L2_CTRL_TYPE_MENU;
|
|
step = 1;
|
|
break;
|
|
case V4L2_CID_RDS_TX_PS_NAME:
|
|
case V4L2_CID_RDS_TX_RADIO_TEXT:
|
|
qctrl->type = V4L2_CTRL_TYPE_STRING;
|
|
break;
|
|
case V4L2_CID_USER_CLASS:
|
|
case V4L2_CID_CAMERA_CLASS:
|
|
case V4L2_CID_MPEG_CLASS:
|
|
case V4L2_CID_FM_TX_CLASS:
|
|
qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
|
|
qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
|
|
min = max = step = def = 0;
|
|
break;
|
|
case V4L2_CID_BG_COLOR:
|
|
qctrl->type = V4L2_CTRL_TYPE_INTEGER;
|
|
step = 1;
|
|
min = 0;
|
|
/* Max is calculated as RGB888 that is 2^24 */
|
|
max = 0xFFFFFF;
|
|
break;
|
|
default:
|
|
qctrl->type = V4L2_CTRL_TYPE_INTEGER;
|
|
break;
|
|
}
|
|
switch (qctrl->id) {
|
|
case V4L2_CID_MPEG_AUDIO_ENCODING:
|
|
case V4L2_CID_MPEG_AUDIO_MODE:
|
|
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
|
|
case V4L2_CID_MPEG_VIDEO_B_FRAMES:
|
|
case V4L2_CID_MPEG_STREAM_TYPE:
|
|
qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
|
|
break;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
case V4L2_CID_AUDIO_BASS:
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
case V4L2_CID_BRIGHTNESS:
|
|
case V4L2_CID_CONTRAST:
|
|
case V4L2_CID_SATURATION:
|
|
case V4L2_CID_HUE:
|
|
case V4L2_CID_RED_BALANCE:
|
|
case V4L2_CID_BLUE_BALANCE:
|
|
case V4L2_CID_GAMMA:
|
|
case V4L2_CID_SHARPNESS:
|
|
case V4L2_CID_RDS_TX_DEVIATION:
|
|
case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
|
|
case V4L2_CID_AUDIO_LIMITER_DEVIATION:
|
|
case V4L2_CID_AUDIO_COMPRESSION_GAIN:
|
|
case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
|
|
case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
|
|
case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
|
|
case V4L2_CID_PILOT_TONE_DEVIATION:
|
|
case V4L2_CID_PILOT_TONE_FREQUENCY:
|
|
case V4L2_CID_TUNE_POWER_LEVEL:
|
|
case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
|
|
qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
|
|
break;
|
|
case V4L2_CID_PAN_RELATIVE:
|
|
case V4L2_CID_TILT_RELATIVE:
|
|
case V4L2_CID_FOCUS_RELATIVE:
|
|
case V4L2_CID_ZOOM_RELATIVE:
|
|
qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
|
|
break;
|
|
}
|
|
qctrl->minimum = min;
|
|
qctrl->maximum = max;
|
|
qctrl->step = step;
|
|
qctrl->default_value = def;
|
|
qctrl->reserved[0] = qctrl->reserved[1] = 0;
|
|
strlcpy(qctrl->name, name, sizeof(qctrl->name));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_fill);
|
|
|
|
/* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
|
|
the menu. The qctrl pointer may be NULL, in which case it is ignored.
|
|
If menu_items is NULL, then the menu items are retrieved using
|
|
v4l2_ctrl_get_menu. */
|
|
int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
|
|
const char **menu_items)
|
|
{
|
|
int i;
|
|
|
|
qmenu->reserved = 0;
|
|
if (menu_items == NULL)
|
|
menu_items = v4l2_ctrl_get_menu(qmenu->id);
|
|
if (menu_items == NULL ||
|
|
(qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
|
|
return -EINVAL;
|
|
for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
|
|
if (menu_items[i] == NULL || menu_items[i][0] == '\0')
|
|
return -EINVAL;
|
|
strlcpy(qmenu->name, menu_items[qmenu->index], sizeof(qmenu->name));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_menu);
|
|
|
|
/* Fill in a struct v4l2_querymenu based on the specified array of valid
|
|
menu items (terminated by V4L2_CTRL_MENU_IDS_END).
|
|
Use this if there are 'holes' in the list of valid menu items. */
|
|
int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids)
|
|
{
|
|
const char **menu_items = v4l2_ctrl_get_menu(qmenu->id);
|
|
|
|
qmenu->reserved = 0;
|
|
if (menu_items == NULL || ids == NULL)
|
|
return -EINVAL;
|
|
while (*ids != V4L2_CTRL_MENU_IDS_END) {
|
|
if (*ids++ == qmenu->index) {
|
|
strlcpy(qmenu->name, menu_items[qmenu->index],
|
|
sizeof(qmenu->name));
|
|
return 0;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_menu_valid_items);
|
|
|
|
/* ctrl_classes points to an array of u32 pointers, the last element is
|
|
a NULL pointer. 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.
|
|
|
|
This function returns the first ID that follows after the given ID.
|
|
When no more controls are available 0 is returned. */
|
|
u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
|
|
{
|
|
u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
|
|
const u32 *pctrl;
|
|
|
|
if (ctrl_classes == NULL)
|
|
return 0;
|
|
|
|
/* if no query is desired, then check if the ID is part of ctrl_classes */
|
|
if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
|
|
/* find class */
|
|
while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
|
|
ctrl_classes++;
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
pctrl = *ctrl_classes;
|
|
/* find control ID */
|
|
while (*pctrl && *pctrl != id) pctrl++;
|
|
return *pctrl ? id : 0;
|
|
}
|
|
id &= V4L2_CTRL_ID_MASK;
|
|
id++; /* select next control */
|
|
/* find first class that matches (or is greater than) the class of
|
|
the ID */
|
|
while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
|
|
ctrl_classes++;
|
|
/* no more classes */
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
pctrl = *ctrl_classes;
|
|
/* find first ctrl within the class that is >= ID */
|
|
while (*pctrl && *pctrl < id) pctrl++;
|
|
if (*pctrl)
|
|
return *pctrl;
|
|
/* we are at the end of the controls of the current class. */
|
|
/* continue with next class if available */
|
|
ctrl_classes++;
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
return **ctrl_classes;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_next);
|
|
|
|
int v4l2_chip_match_host(const struct v4l2_dbg_match *match)
|
|
{
|
|
switch (match->type) {
|
|
case V4L2_CHIP_MATCH_HOST:
|
|
return match->addr == 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_match_host);
|
|
|
|
#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
|
|
int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match)
|
|
{
|
|
int len;
|
|
|
|
if (c == NULL || match == NULL)
|
|
return 0;
|
|
|
|
switch (match->type) {
|
|
case V4L2_CHIP_MATCH_I2C_DRIVER:
|
|
if (c->driver == NULL || c->driver->driver.name == NULL)
|
|
return 0;
|
|
len = strlen(c->driver->driver.name);
|
|
/* legacy drivers have a ' suffix, don't try to match that */
|
|
if (len && c->driver->driver.name[len - 1] == '\'')
|
|
len--;
|
|
return len && !strncmp(c->driver->driver.name, match->name, len);
|
|
case V4L2_CHIP_MATCH_I2C_ADDR:
|
|
return c->addr == match->addr;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
|
|
|
|
int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
|
|
u32 ident, u32 revision)
|
|
{
|
|
if (!v4l2_chip_match_i2c_client(c, &chip->match))
|
|
return 0;
|
|
if (chip->ident == V4L2_IDENT_NONE) {
|
|
chip->ident = ident;
|
|
chip->revision = revision;
|
|
}
|
|
else {
|
|
chip->ident = V4L2_IDENT_AMBIGUOUS;
|
|
chip->revision = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
|
|
|
|
/* ----------------------------------------------------------------- */
|
|
|
|
/* I2C Helper functions */
|
|
|
|
|
|
void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
|
|
const struct v4l2_subdev_ops *ops)
|
|
{
|
|
v4l2_subdev_init(sd, ops);
|
|
sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
|
|
/* the owner is the same as the i2c_client's driver owner */
|
|
sd->owner = client->driver->driver.owner;
|
|
/* i2c_client and v4l2_subdev point to one another */
|
|
v4l2_set_subdevdata(sd, client);
|
|
i2c_set_clientdata(client, sd);
|
|
/* initialize name */
|
|
snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
|
|
client->driver->driver.name, i2c_adapter_id(client->adapter),
|
|
client->addr);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
|
|
|
|
|
|
|
|
/* Load an i2c sub-device. */
|
|
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)
|
|
{
|
|
struct v4l2_subdev *sd = NULL;
|
|
struct i2c_client *client;
|
|
|
|
BUG_ON(!v4l2_dev);
|
|
|
|
if (module_name)
|
|
request_module(module_name);
|
|
|
|
/* Create the i2c client */
|
|
if (info->addr == 0 && probe_addrs)
|
|
client = i2c_new_probed_device(adapter, info, probe_addrs);
|
|
else
|
|
client = i2c_new_device(adapter, info);
|
|
|
|
/* Note: by loading the module first we are certain that c->driver
|
|
will be set if the driver was found. If the module was not loaded
|
|
first, then the i2c core tries to delay-load the module for us,
|
|
and then c->driver is still NULL until the module is finally
|
|
loaded. This delay-load mechanism doesn't work if other drivers
|
|
want to use the i2c device, so explicitly loading the module
|
|
is the best alternative. */
|
|
if (client == NULL || client->driver == NULL)
|
|
goto error;
|
|
|
|
/* Lock the module so we can safely get the v4l2_subdev pointer */
|
|
if (!try_module_get(client->driver->driver.owner))
|
|
goto error;
|
|
sd = i2c_get_clientdata(client);
|
|
|
|
/* Register with the v4l2_device which increases the module's
|
|
use count as well. */
|
|
if (v4l2_device_register_subdev(v4l2_dev, sd))
|
|
sd = NULL;
|
|
/* Decrease the module use count to match the first try_module_get. */
|
|
module_put(client->driver->driver.owner);
|
|
|
|
if (sd) {
|
|
/* We return errors from v4l2_subdev_call only if we have the
|
|
callback as the .s_config is not mandatory */
|
|
int err = v4l2_subdev_call(sd, core, s_config,
|
|
info->irq, info->platform_data);
|
|
|
|
if (err && err != -ENOIOCTLCMD) {
|
|
v4l2_device_unregister_subdev(sd);
|
|
sd = NULL;
|
|
}
|
|
}
|
|
|
|
error:
|
|
/* If we have a client but no subdev, then something went wrong and
|
|
we must unregister the client. */
|
|
if (client && sd == NULL)
|
|
i2c_unregister_device(client);
|
|
return sd;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
|
|
|
|
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)
|
|
{
|
|
struct i2c_board_info info;
|
|
|
|
/* Setup the i2c board info with the device type and
|
|
the device address. */
|
|
memset(&info, 0, sizeof(info));
|
|
strlcpy(info.type, client_type, sizeof(info.type));
|
|
info.addr = addr;
|
|
info.irq = irq;
|
|
info.platform_data = platform_data;
|
|
|
|
return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, module_name,
|
|
&info, probe_addrs);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_cfg);
|
|
|
|
/* Return i2c client address of v4l2_subdev. */
|
|
unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
return client ? client->addr : I2C_CLIENT_END;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
|
|
|
|
/* 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)
|
|
{
|
|
static const unsigned short radio_addrs[] = {
|
|
#if defined(CONFIG_MEDIA_TUNER_TEA5761) || defined(CONFIG_MEDIA_TUNER_TEA5761_MODULE)
|
|
0x10,
|
|
#endif
|
|
0x60,
|
|
I2C_CLIENT_END
|
|
};
|
|
static const unsigned short demod_addrs[] = {
|
|
0x42, 0x43, 0x4a, 0x4b,
|
|
I2C_CLIENT_END
|
|
};
|
|
static const unsigned short tv_addrs[] = {
|
|
0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
|
|
0x60, 0x61, 0x62, 0x63, 0x64,
|
|
I2C_CLIENT_END
|
|
};
|
|
|
|
switch (type) {
|
|
case ADDRS_RADIO:
|
|
return radio_addrs;
|
|
case ADDRS_DEMOD:
|
|
return demod_addrs;
|
|
case ADDRS_TV:
|
|
return tv_addrs;
|
|
case ADDRS_TV_WITH_DEMOD:
|
|
return tv_addrs + 4;
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
|
|
|
|
#endif /* defined(CONFIG_I2C) */
|
|
|
|
/* Clamp x to be between min and max, aligned to a multiple of 2^align. min
|
|
* and max don't have to be aligned, but there must be at least one valid
|
|
* value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
|
|
* of 16 between 17 and 31. */
|
|
static unsigned int clamp_align(unsigned int x, unsigned int min,
|
|
unsigned int max, unsigned int align)
|
|
{
|
|
/* Bits that must be zero to be aligned */
|
|
unsigned int mask = ~((1 << align) - 1);
|
|
|
|
/* Round to nearest aligned value */
|
|
if (align)
|
|
x = (x + (1 << (align - 1))) & mask;
|
|
|
|
/* Clamp to aligned value of min and max */
|
|
if (x < min)
|
|
x = (min + ~mask) & mask;
|
|
else if (x > max)
|
|
x = max & mask;
|
|
|
|
return x;
|
|
}
|
|
|
|
/* Bound an image to have a width between wmin and wmax, and height between
|
|
* hmin and hmax, inclusive. Additionally, the width will be a multiple of
|
|
* 2^walign, the height will be a multiple of 2^halign, and the overall size
|
|
* (width*height) will be a multiple of 2^salign. The image may be shrunk
|
|
* or enlarged to fit the alignment constraints.
|
|
*
|
|
* The width or height maximum must not be smaller than the corresponding
|
|
* minimum. The alignments must not be so high there are no possible image
|
|
* sizes within the allowed bounds. wmin and hmin must be at least 1
|
|
* (don't use 0). If you don't care about a certain alignment, specify 0,
|
|
* as 2^0 is 1 and one byte alignment is equivalent to no alignment. If
|
|
* you only want to adjust downward, specify a maximum that's the same as
|
|
* the initial value.
|
|
*/
|
|
void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
|
|
unsigned int walign,
|
|
u32 *h, unsigned int hmin, unsigned int hmax,
|
|
unsigned int halign, unsigned int salign)
|
|
{
|
|
*w = clamp_align(*w, wmin, wmax, walign);
|
|
*h = clamp_align(*h, hmin, hmax, halign);
|
|
|
|
/* Usually we don't need to align the size and are done now. */
|
|
if (!salign)
|
|
return;
|
|
|
|
/* How much alignment do we have? */
|
|
walign = __ffs(*w);
|
|
halign = __ffs(*h);
|
|
/* Enough to satisfy the image alignment? */
|
|
if (walign + halign < salign) {
|
|
/* Max walign where there is still a valid width */
|
|
unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
|
|
/* Max halign where there is still a valid height */
|
|
unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
|
|
|
|
/* up the smaller alignment until we have enough */
|
|
do {
|
|
if (halign >= hmaxa ||
|
|
(walign <= halign && walign < wmaxa)) {
|
|
*w = clamp_align(*w, wmin, wmax, walign + 1);
|
|
walign = __ffs(*w);
|
|
} else {
|
|
*h = clamp_align(*h, hmin, hmax, halign + 1);
|
|
halign = __ffs(*h);
|
|
}
|
|
} while (halign + walign < salign);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l_bound_align_image);
|
|
|
|
/**
|
|
* v4l_fill_dv_preset_info - fill description of a digital video preset
|
|
* @preset - preset value
|
|
* @info - pointer to struct v4l2_dv_enum_preset
|
|
*
|
|
* drivers can use this helper function to fill description of dv preset
|
|
* in info.
|
|
*/
|
|
int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info)
|
|
{
|
|
static const struct v4l2_dv_preset_info {
|
|
u16 width;
|
|
u16 height;
|
|
const char *name;
|
|
} dv_presets[] = {
|
|
{ 0, 0, "Invalid" }, /* V4L2_DV_INVALID */
|
|
{ 720, 480, "480p@59.94" }, /* V4L2_DV_480P59_94 */
|
|
{ 720, 576, "576p@50" }, /* V4L2_DV_576P50 */
|
|
{ 1280, 720, "720p@24" }, /* V4L2_DV_720P24 */
|
|
{ 1280, 720, "720p@25" }, /* V4L2_DV_720P25 */
|
|
{ 1280, 720, "720p@30" }, /* V4L2_DV_720P30 */
|
|
{ 1280, 720, "720p@50" }, /* V4L2_DV_720P50 */
|
|
{ 1280, 720, "720p@59.94" }, /* V4L2_DV_720P59_94 */
|
|
{ 1280, 720, "720p@60" }, /* V4L2_DV_720P60 */
|
|
{ 1920, 1080, "1080i@29.97" }, /* V4L2_DV_1080I29_97 */
|
|
{ 1920, 1080, "1080i@30" }, /* V4L2_DV_1080I30 */
|
|
{ 1920, 1080, "1080i@25" }, /* V4L2_DV_1080I25 */
|
|
{ 1920, 1080, "1080i@50" }, /* V4L2_DV_1080I50 */
|
|
{ 1920, 1080, "1080i@60" }, /* V4L2_DV_1080I60 */
|
|
{ 1920, 1080, "1080p@24" }, /* V4L2_DV_1080P24 */
|
|
{ 1920, 1080, "1080p@25" }, /* V4L2_DV_1080P25 */
|
|
{ 1920, 1080, "1080p@30" }, /* V4L2_DV_1080P30 */
|
|
{ 1920, 1080, "1080p@50" }, /* V4L2_DV_1080P50 */
|
|
{ 1920, 1080, "1080p@60" }, /* V4L2_DV_1080P60 */
|
|
};
|
|
|
|
if (info == NULL || preset >= ARRAY_SIZE(dv_presets))
|
|
return -EINVAL;
|
|
|
|
info->preset = preset;
|
|
info->width = dv_presets[preset].width;
|
|
info->height = dv_presets[preset].height;
|
|
strlcpy(info->name, dv_presets[preset].name, sizeof(info->name));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l_fill_dv_preset_info);
|