twl4030-madc.h
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/*
* twl4030_madc.h - Header for TWL4030 MADC
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* J Keerthy <j-keerthy@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifndef _TWL4030_MADC_H
#define _TWL4030_MADC_H
struct twl4030_madc_conversion_method {
u8 sel;
u8 avg;
u8 rbase;
u8 ctrl;
};
#define TWL4030_MADC_MAX_CHANNELS 16
/*
* twl4030_madc_request- madc request packet for channel conversion
* @channels: 16 bit bitmap for individual channels
* @do_avgP: sample the input channel for 4 consecutive cycles
* @method: RT, SW1, SW2
* @type: Polling or interrupt based method
* @raw: Return raw value, do not convert it
*/
struct twl4030_madc_request {
unsigned long channels;
u16 do_avg;
u16 method;
u16 type;
bool active;
bool result_pending;
bool raw;
int rbuf[TWL4030_MADC_MAX_CHANNELS];
void (*func_cb)(int len, int channels, int *buf);
};
enum conversion_methods {
TWL4030_MADC_RT,
TWL4030_MADC_SW1,
TWL4030_MADC_SW2,
TWL4030_MADC_NUM_METHODS
};
enum sample_type {
TWL4030_MADC_WAIT,
TWL4030_MADC_IRQ_ONESHOT,
TWL4030_MADC_IRQ_REARM
};
#define TWL4030_MADC_CTRL1 0x00
#define TWL4030_MADC_CTRL2 0x01
#define TWL4030_MADC_RTSELECT_LSB 0x02
#define TWL4030_MADC_SW1SELECT_LSB 0x06
#define TWL4030_MADC_SW2SELECT_LSB 0x0A
#define TWL4030_MADC_RTAVERAGE_LSB 0x04
#define TWL4030_MADC_SW1AVERAGE_LSB 0x08
#define TWL4030_MADC_SW2AVERAGE_LSB 0x0C
#define TWL4030_MADC_CTRL_SW1 0x12
#define TWL4030_MADC_CTRL_SW2 0x13
#define TWL4030_MADC_RTCH0_LSB 0x17
#define TWL4030_MADC_GPCH0_LSB 0x37
#define TWL4030_MADC_MADCON (1 << 0) /* MADC power on */
#define TWL4030_MADC_BUSY (1 << 0) /* MADC busy */
/* MADC conversion completion */
#define TWL4030_MADC_EOC_SW (1 << 1)
/* MADC SWx start conversion */
#define TWL4030_MADC_SW_START (1 << 5)
#define TWL4030_MADC_ADCIN0 (1 << 0)
#define TWL4030_MADC_ADCIN1 (1 << 1)
#define TWL4030_MADC_ADCIN2 (1 << 2)
#define TWL4030_MADC_ADCIN3 (1 << 3)
#define TWL4030_MADC_ADCIN4 (1 << 4)
#define TWL4030_MADC_ADCIN5 (1 << 5)
#define TWL4030_MADC_ADCIN6 (1 << 6)
#define TWL4030_MADC_ADCIN7 (1 << 7)
#define TWL4030_MADC_ADCIN8 (1 << 8)
#define TWL4030_MADC_ADCIN9 (1 << 9)
#define TWL4030_MADC_ADCIN10 (1 << 10)
#define TWL4030_MADC_ADCIN11 (1 << 11)
#define TWL4030_MADC_ADCIN12 (1 << 12)
#define TWL4030_MADC_ADCIN13 (1 << 13)
#define TWL4030_MADC_ADCIN14 (1 << 14)
#define TWL4030_MADC_ADCIN15 (1 << 15)
/* Fixed channels */
#define TWL4030_MADC_BTEMP TWL4030_MADC_ADCIN1
#define TWL4030_MADC_VBUS TWL4030_MADC_ADCIN8
#define TWL4030_MADC_VBKB TWL4030_MADC_ADCIN9
#define TWL4030_MADC_ICHG TWL4030_MADC_ADCIN10
#define TWL4030_MADC_VCHG TWL4030_MADC_ADCIN11
#define TWL4030_MADC_VBAT TWL4030_MADC_ADCIN12
/* Step size and prescaler ratio */
#define TEMP_STEP_SIZE 147
#define TEMP_PSR_R 100
#define CURR_STEP_SIZE 147
#define CURR_PSR_R1 44
#define CURR_PSR_R2 88
#define TWL4030_BCI_BCICTL1 0x23
#define TWL4030_BCI_CGAIN 0x020
#define TWL4030_BCI_MESBAT (1 << 1)
#define TWL4030_BCI_TYPEN (1 << 4)
#define TWL4030_BCI_ITHEN (1 << 3)
#define REG_BCICTL2 0x024
#define TWL4030_BCI_ITHSENS 0x007
/* Register and bits for GPBR1 register */
#define TWL4030_REG_GPBR1 0x0c
#define TWL4030_GPBR1_MADC_HFCLK_EN (1 << 7)
struct twl4030_madc_user_parms {
int channel;
int average;
int status;
u16 result;
};
int twl4030_madc_conversion(struct twl4030_madc_request *conv);
int twl4030_get_madc_conversion(int channel_no);
#endif