aboutsummaryrefslogtreecommitdiff
path: root/include/linux/i2c/twl4030-madc.h
blob: 01f5951070489c0a48eeacc290b4428c203ed852 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/*
 * 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