include/linux/i2c/twl4030-madc.h

   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
  26 struct 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
  44 struct 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
  55 enum conversion_methods {
  56         TWL4030_MADC_RT,
  57         TWL4030_MADC_SW1,
  58         TWL4030_MADC_SW2,
  59         TWL4030_MADC_NUM_METHODS
  60 };
  61
  62 enum 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
 136 struct twl4030_madc_user_parms {
 137         int channel;
 138         int average;
 139         int status;
 140         u16 result;
 141 };
 142
 143 int twl4030_madc_conversion(struct twl4030_madc_request *conv);
 144 int twl4030_get_madc_conversion(int channel_no);
 145 #endif