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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by 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 __lradc_imx233__
#define __lradc_imx233__
#include "config.h"
#include "cpu.h"
#include "cpu.h"
#include "system.h"
#include "system-target.h"
#define LRADC_NUM_CHANNELS 8
#define LRADC_NUM_DELAYS 4
#define LRADC_NUM_SOURCES 16
#define LRADC_SRC(x) (x)
#define LRADC_SRC_XPLUS LRADC_SRC(2)
#define LRADC_SRC_YPLUS LRADC_SRC(3)
#define LRADC_SRC_XMINUS LRADC_SRC(4)
#define LRADC_SRC_YMINUS LRADC_SRC(5)
#define LRADC_SRC_VDDIO LRADC_SRC(6)
#define LRADC_SRC_BATTERY LRADC_SRC(7)
#define LRADC_SRC_PMOS_THIN LRADC_SRC(8)
#define LRADC_SRC_NMOS_THIN LRADC_SRC(9)
#define LRADC_SRC_NMOS_THICK LRADC_SRC(10)
#define LRADC_SRC_PMOS_THICK LRADC_SRC(11)
#define LRADC_SRC_PMOS_THICK LRADC_SRC(11)
#if IMX233_SUBTARGET >= 3700
#define LRADC_SRC_USB_DP LRADC_SRC(12)
#define LRADC_SRC_USB_DN LRADC_SRC(13)
#define LRADC_SRC_VBG LRADC_SRC(14)
#define LRADC_SRC_5V LRADC_SRC(15)
#endif
/* frequency of the delay counter */
#define LRADC_DELAY_FREQ 2000
/* maximum value of a sample (without accumulation), defines the precision */
#define LRADC_MAX_VALUE 4096
typedef void (*lradc_irq_fn_t)(int chan);
void imx233_lradc_init(void);
void imx233_lradc_setup_source(int channel, bool div2, int src);
/* variant of the above only for accumulation changes */
void imx233_lradc_setup_sampling(int channel, bool acc, int nr_samples);
void imx233_lradc_setup_delay(int dchan, int trigger_lradc, int trigger_delays,
int loop_count, int delay);
void imx233_lradc_clear_channel_irq(int channel);
bool imx233_lradc_read_channel_irq(int channel);
void imx233_lradc_enable_channel_irq(int channel, bool enable);
/* a non-null cb will enable the icoll interrupt, a null one will disable it
* NOTE the channel irq is automatically cleared */
void imx233_lradc_set_channel_irq_callback(int channel, lradc_irq_fn_t cb);
void imx233_lradc_kick_channel(int channel);
void imx233_lradc_kick_delay(int dchan);
void imx233_lradc_wait_channel(int channel);
int imx233_lradc_read_channel(int channel);
void imx233_lradc_clear_channel(int channel);
/* acquire a channel, returns -1 on timeout, channel otherwise
* the returned channel is garanteed to be able measure source src */
int imx233_lradc_acquire_channel(int src, int timeout);
void imx233_lradc_release_channel(int chan);
// doesn't check that channel is in use!
void imx233_lradc_reserve_channel(int channel);
int imx233_lradc_acquire_delay(int timeout);
// doesn't check that delay channel is in use!
void imx233_lradc_reserve_delay(int dchannel);
void imx233_lradc_release_delay(int dchan);
/* Setup touch x/yminus pull donws and x/yplus pull ups */
void imx233_lradc_setup_touch(bool xminus_enable, bool yminus_enable,
bool xplus_enable, bool yplus_enable, bool touch_detect);
void imx233_lradc_enable_touch_detect_irq(bool enable);
void imx233_lradc_clear_touch_detect_irq(void);
bool imx233_lradc_read_touch_detect(void);
#if IMX233_SUBTARGET >= 3700
/* enable sensing and return temperature in kelvin,
* channels needs not to be configured */
int imx233_lradc_sense_die_temperature(int nmos_chan, int pmos_chan);
#endif
/* return *raw* external temperature, might need some transformation
* channel needs not to be configured */
int imx233_lradc_sense_ext_temperature(int chan, int sensor);
void imx233_lradc_setup_battery_conversion(bool automatic, unsigned long scale_factor);
// read scaled voltage, only available after proper setup
int imx233_lradc_read_battery_voltage(void);
#endif /* __lradc_imx233__ */
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