linux/include/linux/i2c/twl4030-madc.h
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   1/*
   2 * twl4030_madc.h - Header for TWL4030 MADC
   3 *
   4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   5 * J Keerthy <j-keerthy@ti.com>
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License
   9 * version 2 as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19 * 02110-1301 USA
  20 *
  21 */
  22
  23#ifndef _TWL4030_MADC_H
  24#define _TWL4030_MADC_H
  25
  26struct twl4030_madc_conversion_method {
  27        u8 sel;
  28        u8 avg;
  29        u8 rbase;
  30        u8 ctrl;
  31};
  32
  33#define TWL4030_MADC_MAX_CHANNELS 16
  34
  35
  36/*
  37 * twl4030_madc_request- madc request packet for channel conversion
  38 * @channels:   16 bit bitmap for individual channels
  39 * @do_avgP:    sample the input channel for 4 consecutive cycles
  40 * @method:     RT, SW1, SW2
  41 * @type:       Polling or interrupt based method
  42 */
  43
  44struct twl4030_madc_request {
  45        unsigned long channels;
  46        u16 do_avg;
  47        u16 method;
  48        u16 type;
  49        bool active;
  50        bool result_pending;
  51        int rbuf[TWL4030_MADC_MAX_CHANNELS];
  52        void (*func_cb)(int len, int channels, int *buf);
  53};
  54
  55enum conversion_methods {
  56        TWL4030_MADC_RT,
  57        TWL4030_MADC_SW1,
  58        TWL4030_MADC_SW2,
  59        TWL4030_MADC_NUM_METHODS
  60};
  61
  62enum sample_type {
  63        TWL4030_MADC_WAIT,
  64        TWL4030_MADC_IRQ_ONESHOT,
  65        TWL4030_MADC_IRQ_REARM
  66};
  67
  68#define TWL4030_MADC_CTRL1              0x00
  69#define TWL4030_MADC_CTRL2              0x01
  70
  71#define TWL4030_MADC_RTSELECT_LSB       0x02
  72#define TWL4030_MADC_SW1SELECT_LSB      0x06
  73#define TWL4030_MADC_SW2SELECT_LSB      0x0A
  74
  75#define TWL4030_MADC_RTAVERAGE_LSB      0x04
  76#define TWL4030_MADC_SW1AVERAGE_LSB     0x08
  77#define TWL4030_MADC_SW2AVERAGE_LSB     0x0C
  78
  79#define TWL4030_MADC_CTRL_SW1           0x12
  80#define TWL4030_MADC_CTRL_SW2           0x13
  81
  82#define TWL4030_MADC_RTCH0_LSB          0x17
  83#define TWL4030_MADC_GPCH0_LSB          0x37
  84
  85#define TWL4030_MADC_MADCON     (1 << 0)        /* MADC power on */
  86#define TWL4030_MADC_BUSY       (1 << 0)        /* MADC busy */
  87/* MADC conversion completion */
  88#define TWL4030_MADC_EOC_SW     (1 << 1)
  89/* MADC SWx start conversion */
  90#define TWL4030_MADC_SW_START   (1 << 5)
  91#define TWL4030_MADC_ADCIN0     (1 << 0)
  92#define TWL4030_MADC_ADCIN1     (1 << 1)
  93#define TWL4030_MADC_ADCIN2     (1 << 2)
  94#define TWL4030_MADC_ADCIN3     (1 << 3)
  95#define TWL4030_MADC_ADCIN4     (1 << 4)
  96#define TWL4030_MADC_ADCIN5     (1 << 5)
  97#define TWL4030_MADC_ADCIN6     (1 << 6)
  98#define TWL4030_MADC_ADCIN7     (1 << 7)
  99#define TWL4030_MADC_ADCIN8     (1 << 8)
 100#define TWL4030_MADC_ADCIN9     (1 << 9)
 101#define TWL4030_MADC_ADCIN10    (1 << 10)
 102#define TWL4030_MADC_ADCIN11    (1 << 11)
 103#define TWL4030_MADC_ADCIN12    (1 << 12)
 104#define TWL4030_MADC_ADCIN13    (1 << 13)
 105#define TWL4030_MADC_ADCIN14    (1 << 14)
 106#define TWL4030_MADC_ADCIN15    (1 << 15)
 107
 108/* Fixed channels */
 109#define TWL4030_MADC_BTEMP      TWL4030_MADC_ADCIN1
 110#define TWL4030_MADC_VBUS       TWL4030_MADC_ADCIN8
 111#define TWL4030_MADC_VBKB       TWL4030_MADC_ADCIN9
 112#define TWL4030_MADC_ICHG       TWL4030_MADC_ADCIN10
 113#define TWL4030_MADC_VCHG       TWL4030_MADC_ADCIN11
 114#define TWL4030_MADC_VBAT       TWL4030_MADC_ADCIN12
 115
 116/* Step size and prescaler ratio */
 117#define TEMP_STEP_SIZE          147
 118#define TEMP_PSR_R              100
 119#define CURR_STEP_SIZE          147
 120#define CURR_PSR_R1             44
 121#define CURR_PSR_R2             88
 122
 123#define TWL4030_BCI_BCICTL1     0x23
 124#define TWL4030_BCI_CGAIN       0x020
 125#define TWL4030_BCI_MESBAT      (1 << 1)
 126#define TWL4030_BCI_TYPEN       (1 << 4)
 127#define TWL4030_BCI_ITHEN       (1 << 3)
 128
 129#define REG_BCICTL2             0x024
 130#define TWL4030_BCI_ITHSENS     0x007
 131
 132/* Register and bits for GPBR1 register */
 133#define TWL4030_REG_GPBR1               0x0c
 134#define TWL4030_GPBR1_MADC_HFCLK_EN     (1 << 7)
 135
 136struct twl4030_madc_user_parms {
 137        int channel;
 138        int average;
 139        int status;
 140        u16 result;
 141};
 142
 143int twl4030_madc_conversion(struct twl4030_madc_request *conv);
 144int twl4030_get_madc_conversion(int channel_no);
 145#endif
 146
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