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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2016 Amaury Pouly
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __NWZ_FB_H__
#define __NWZ_FB_H__
#define NWZ_FB_LCD_DEV "/dev/fb/0"
#define NWZ_FB_TV_DEV "/dev/fb/1"
#define NWZ_FB_TYPE 'N'
/* How backlight works:
*
* The brightness interface is a bit strange. There 6 levels: 0 throught 5.
* Level 0 means backlight off. When changing brightness, one sets level to the
* target brightness. The driver is gradually change the brightness to reach the
* target level. The step parameters control how many hardware steps will be done.
* For example, setting step to 1 will brutally change the level in one step.
* Setting step to 2 will change brightness in two steps: one intermediate and
* finally the target one. The more steps, the more gradual the transition. The
* period parameters controls the speed to changes between steps. Using this
* interface, one can achieve fade in/out at various speeds. */
#define NWZ_FB_BL_MIN_LEVEL 0
#define NWZ_FB_BL_MAX_LEVEL 5
#define NWZ_FB_BL_MIN_STEP 1
#define NWZ_FB_BL_MAX_STEP 100
#define NWZ_FB_BL_MIN_PERIOD 10
struct nwz_fb_brightness
{
int level; /* brightness level: 0-5 */
int step; /* number of hardware steps to do when changing: 1-100 */
int period; /* period in ms between steps when changing: >=10 */
};
#define NWZ_FB_SET_BRIGHTNESS _IOW(NWZ_FB_TYPE, 0x07, struct nwz_fb_brightness)
#define NWZ_FB_GET_BRIGHTNESS _IOR(NWZ_FB_TYPE, 0x08, struct nwz_fb_brightness)
#endif /* __NWZ_FB_H__ */
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