/*
 * twl4030_madc.h - Header for TWL4030 MADC
 *
 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
 * J Keerthy <j-keerthy at 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
 */

struct twl4030_madc_request {
   u16 channels; /* 16 bit bitmap for individual channels */
   u16 do_avg; /* sample the input channel for 4 consecutive cycles
           and provide the average of 4 conversions */
   u16 method; /* RT, SW1, SW2 */
   u16 type; /*polling or interrupt based */
   bool active;
   bool result_pending;
   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

#define TWL4030_BCI_BCICTL1    0x23
#define TWL4030_BCI_MESBAT (1 << 1)
#define TWL4030_BCI_TYPEN  (1 << 4)
#define TWL4030_BCI_ITHEN  (1 << 3)

/* Register and bits for GPBR1 register */
#define TWL4030_REG_GPBR1               0x0c
#define TWL4030_GPBR1_MADC_HFCLK_EN     (0x1 << 7)
#define TWL4030_GPBR1_DFLT_MADC_CLK_EN  (0x1 << 4)

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