/*
* comparator.h -- Comparator Aux ADC for Wolfson WM8350 PMIC
*
* Copyright 2007 Wolfson Microelectronics PLC
*
* 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.
*/

#ifndef __LINUX_MFD_WM8350_COMPARATOR_H_
#define __LINUX_MFD_WM8350_COMPARATOR_H_

/*
* Registers
*/

#define WM8350_DIGITISER_CONTROL_1 0x90
#define WM8350_DIGITISER_CONTROL_2 0x91
#define WM8350_AUX1_READBACK 0x98
#define WM8350_AUX2_READBACK 0x99
#define WM8350_AUX3_READBACK 0x9A
#define WM8350_AUX4_READBACK 0x9B
#define WM8350_CHIP_TEMP_READBACK 0x9F
#define WM8350_GENERIC_COMPARATOR_CONTROL 0xA3
#define WM8350_GENERIC_COMPARATOR_1 0xA4
#define WM8350_GENERIC_COMPARATOR_2 0xA5
#define WM8350_GENERIC_COMPARATOR_3 0xA6
#define WM8350_GENERIC_COMPARATOR_4 0xA7

/*
* R144 (0x90) - Digitiser Control (1)
*/
#define WM8350_AUXADC_CTC 0x4000
#define WM8350_AUXADC_POLL 0x2000
#define WM8350_AUXADC_HIB_MODE 0x1000
#define WM8350_AUXADC_SEL8 0x0080
#define WM8350_AUXADC_SEL7 0x0040
#define WM8350_AUXADC_SEL6 0x0020
#define WM8350_AUXADC_SEL5 0x0010
#define WM8350_AUXADC_SEL4 0x0008
#define WM8350_AUXADC_SEL3 0x0004
#define WM8350_AUXADC_SEL2 0x0002
#define WM8350_AUXADC_SEL1 0x0001

/*
* R145 (0x91) - Digitiser Control (2)
*/
#define WM8350_AUXADC_MASKMODE_MASK 0x3000
#define WM8350_AUXADC_CRATE_MASK 0x0700
#define WM8350_AUXADC_CAL 0x0004
#define WM8350_AUX_RBMODE 0x0002
#define WM8350_AUXADC_WAIT 0x0001

/*
* R152 (0x98) - AUX1 Readback
*/
#define WM8350_AUXADC_SCALE1_MASK 0x6000
#define WM8350_AUXADC_REF1 0x1000
#define WM8350_AUXADC_DATA1_MASK 0x0FFF

/*
* R153 (0x99) - AUX2 Readback
*/
#define WM8350_AUXADC_SCALE2_MASK 0x6000
#define WM8350_AUXADC_REF2 0x1000
#define WM8350_AUXADC_DATA2_MASK 0x0FFF

/*
* R154 (0x9A) - AUX3 Readback
*/
#define WM8350_AUXADC_SCALE3_MASK 0x6000
#define WM8350_AUXADC_REF3 0x1000
#define WM8350_AUXADC_DATA3_MASK 0x0FFF

/*
* R155 (0x9B) - AUX4 Readback
*/
#define WM8350_AUXADC_SCALE4_MASK 0x6000
#define WM8350_AUXADC_REF4 0x1000
#define WM8350_AUXADC_DATA4_MASK 0x0FFF

/*
* R156 (0x9C) - USB Voltage Readback
*/
#define WM8350_AUXADC_DATA_USB_MASK 0x0FFF

/*
* R157 (0x9D) - LINE Voltage Readback
*/
#define WM8350_AUXADC_DATA_LINE_MASK 0x0FFF

/*
* R158 (0x9E) - BATT Voltage Readback
*/
#define WM8350_AUXADC_DATA_BATT_MASK 0x0FFF

/*
* R159 (0x9F) - Chip Temp Readback
*/
#define WM8350_AUXADC_DATA_CHIPTEMP_MASK 0x0FFF

/*
* R163 (0xA3) - Generic Comparator Control
*/
#define WM8350_DCMP4_ENA 0x0008
#define WM8350_DCMP3_ENA 0x0004
#define WM8350_DCMP2_ENA 0x0002
#define WM8350_DCMP1_ENA 0x0001

/*
* R164 (0xA4) - Generic comparator 1
*/
#define WM8350_DCMP1_SRCSEL_MASK 0xE000
#define WM8350_DCMP1_GT 0x1000
#define WM8350_DCMP1_THR_MASK 0x0FFF

/*
* R165 (0xA5) - Generic comparator 2
*/
#define WM8350_DCMP2_SRCSEL_MASK 0xE000
#define WM8350_DCMP2_GT 0x1000
#define WM8350_DCMP2_THR_MASK 0x0FFF

/*
* R166 (0xA6) - Generic comparator 3
*/
#define WM8350_DCMP3_SRCSEL_MASK 0xE000
#define WM8350_DCMP3_GT 0x1000
#define WM8350_DCMP3_THR_MASK 0x0FFF

/*
* R167 (0xA7) - Generic comparator 4
*/
#define WM8350_DCMP4_SRCSEL_MASK 0xE000
#define WM8350_DCMP4_GT 0x1000
#define WM8350_DCMP4_THR_MASK 0x0FFF

/*
* Interrupts.
*/
#define WM8350_IRQ_AUXADC_DATARDY 16
#define WM8350_IRQ_AUXADC_DCOMP4 17
#define WM8350_IRQ_AUXADC_DCOMP3 18
#define WM8350_IRQ_AUXADC_DCOMP2 19
#define WM8350_IRQ_AUXADC_DCOMP1 20
#define WM8350_IRQ_SYS_HYST_COMP_FAIL 21
#define WM8350_IRQ_SYS_CHIP_GT115 22
#define WM8350_IRQ_SYS_CHIP_GT140 23

/*
* USB/2, LINE & BATT = ((VRTC * 2) / 4095)) * 10e6 uV
* Where VRTC = 2.7 V
*/
#define WM8350_AUX_COEFF 1319

#define WM8350_AUXADC_AUX1 0
#define WM8350_AUXADC_AUX2 1
#define WM8350_AUXADC_AUX3 2
#define WM8350_AUXADC_AUX4 3
#define WM8350_AUXADC_USB 4
#define WM8350_AUXADC_LINE 5
#define WM8350_AUXADC_BATT 6
#define WM8350_AUXADC_TEMP 7

struct wm8350;

/*
* AUX ADC Readback
*/
int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale,
int vref);

#endif