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 * @raw:	Return raw value, do not convert it
43 */
44
45struct twl4030_madc_request {
46	unsigned long channels;
47	bool do_avg;
48	u16 method;
49	u16 type;
50	bool active;
51	bool result_pending;
52	bool raw;
53	int rbuf[TWL4030_MADC_MAX_CHANNELS];
54	void (*func_cb)(int len, int channels, int *buf);
55};
56
57enum conversion_methods {
58	TWL4030_MADC_RT,
59	TWL4030_MADC_SW1,
60	TWL4030_MADC_SW2,
61	TWL4030_MADC_NUM_METHODS
62};
63
64enum sample_type {
65	TWL4030_MADC_WAIT,
66	TWL4030_MADC_IRQ_ONESHOT,
67	TWL4030_MADC_IRQ_REARM
68};
69
70#define TWL4030_MADC_CTRL1		0x00
71#define TWL4030_MADC_CTRL2		0x01
72
73#define TWL4030_MADC_RTSELECT_LSB	0x02
74#define TWL4030_MADC_SW1SELECT_LSB	0x06
75#define TWL4030_MADC_SW2SELECT_LSB	0x0A
76
77#define TWL4030_MADC_RTAVERAGE_LSB	0x04
78#define TWL4030_MADC_SW1AVERAGE_LSB	0x08
79#define TWL4030_MADC_SW2AVERAGE_LSB	0x0C
80
81#define TWL4030_MADC_CTRL_SW1		0x12
82#define TWL4030_MADC_CTRL_SW2		0x13
83
84#define TWL4030_MADC_RTCH0_LSB		0x17
85#define TWL4030_MADC_GPCH0_LSB		0x37
86
87#define TWL4030_MADC_MADCON	(1 << 0)	/* MADC power on */
88#define TWL4030_MADC_BUSY	(1 << 0)	/* MADC busy */
89/* MADC conversion completion */
90#define TWL4030_MADC_EOC_SW	(1 << 1)
91/* MADC SWx start conversion */
92#define TWL4030_MADC_SW_START	(1 << 5)
93#define TWL4030_MADC_ADCIN0	(1 << 0)
94#define TWL4030_MADC_ADCIN1	(1 << 1)
95#define TWL4030_MADC_ADCIN2	(1 << 2)
96#define TWL4030_MADC_ADCIN3	(1 << 3)
97#define TWL4030_MADC_ADCIN4	(1 << 4)
98#define TWL4030_MADC_ADCIN5	(1 << 5)
99#define TWL4030_MADC_ADCIN6	(1 << 6)
100#define TWL4030_MADC_ADCIN7	(1 << 7)
101#define TWL4030_MADC_ADCIN8	(1 << 8)
102#define TWL4030_MADC_ADCIN9	(1 << 9)
103#define TWL4030_MADC_ADCIN10	(1 << 10)
104#define TWL4030_MADC_ADCIN11	(1 << 11)
105#define TWL4030_MADC_ADCIN12	(1 << 12)
106#define TWL4030_MADC_ADCIN13	(1 << 13)
107#define TWL4030_MADC_ADCIN14	(1 << 14)
108#define TWL4030_MADC_ADCIN15	(1 << 15)
109
110/* Fixed channels */
111#define TWL4030_MADC_BTEMP	TWL4030_MADC_ADCIN1
112#define TWL4030_MADC_VBUS	TWL4030_MADC_ADCIN8
113#define TWL4030_MADC_VBKB	TWL4030_MADC_ADCIN9
114#define TWL4030_MADC_ICHG	TWL4030_MADC_ADCIN10
115#define TWL4030_MADC_VCHG	TWL4030_MADC_ADCIN11
116#define TWL4030_MADC_VBAT	TWL4030_MADC_ADCIN12
117
118/* Step size and prescaler ratio */
119#define TEMP_STEP_SIZE          147
120#define TEMP_PSR_R              100
121#define CURR_STEP_SIZE		147
122#define CURR_PSR_R1		44
123#define CURR_PSR_R2		88
124
125#define TWL4030_BCI_BCICTL1	0x23
126#define TWL4030_BCI_CGAIN	0x020
127#define TWL4030_BCI_MESBAT	(1 << 1)
128#define TWL4030_BCI_TYPEN	(1 << 4)
129#define TWL4030_BCI_ITHEN	(1 << 3)
130
131#define REG_BCICTL2             0x024
132#define TWL4030_BCI_ITHSENS	0x007
133
134/* Register and bits for GPBR1 register */
135#define TWL4030_REG_GPBR1		0x0c
136#define TWL4030_GPBR1_MADC_HFCLK_EN	(1 << 7)
137
138struct twl4030_madc_user_parms {
139	int channel;
140	int average;
141	int status;
142	u16 result;
143};
144
145int twl4030_madc_conversion(struct twl4030_madc_request *conv);
146int twl4030_get_madc_conversion(int channel_no);
147#endif
148