1
/*
2
 * Ambient light sensor driver for Nintendo Switch's Rohm BH1730
3
 *
4
 * Copyright (c) 2018 CTCaer
5
 *
6
 * This program is free software; you can redistribute it and/or modify it
7
 * under the terms and conditions of the GNU General Public License,
8
 * version 2, as published by the Free Software Foundation.
9
 *
10
 * This program is distributed in the hope it will be useful, but WITHOUT
11
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13
 * more details.
14
 *
15
 * You should have received a copy of the GNU General Public License
16
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
17
 */
18

19
#ifndef __ALS_H_
20
#define __ALS_H_
21

22
#include <utils/types.h>
23

24
#define BH1730_I2C_ADDR 0x29
25

26
#define BH1730_CMD_MAGIC   0x80
27
#define BH1730_CMD_SETADDR 0x00
28
#define BH1730_CMD_SPECCMD 0x60
29
#define  BH1730_SPECCMD_RESET 0x4
30

31
#define BH1730_CONTROL_REG   0x00
32
#define  BH1730_CTL_ADC_VALID 0x10
33
#define  BH1730_CTL_ONE_TIME  0x08
34
#define  BH1730_CTL_DAT0_ONLY 0x04
35
#define  BH1730_CTL_ADC_EN    0x02
36
#define  BH1730_CTL_POWER_ON  0x01
37
#define BH1730_TIMING_REG    0x01
38
#define BH1730_GAIN_REG      0x07
39
#define  BH1730_GAIN_1X      0x00
40
#define  BH1730_GAIN_2X      0x01
41
#define  BH1730_GAIN_64X     0x02
42
#define  BH1730_GAIN_128X    0x03
43
#define BH1730_DATA0LOW_REG  0x14
44
#define BH1730_DATA0HIGH_REG 0x15
45
#define BH1730_DATA1LOW_REG  0x16
46
#define BH1730_DATA1HIGH_REG 0x17
47

48
#define BH1730_ADDR(reg) (BH1730_CMD_MAGIC | BH1730_CMD_SETADDR | (reg))
49
#define BH1730_SPEC(cmd) (BH1730_CMD_MAGIC | BH1730_CMD_SPECCMD | (cmd))
50

51
typedef struct _als_ctxt_t
52
{
53
	u32  lux;
54
	bool over_limit;
55
	u32  vi_light;
56
	u32  ir_light;
57
	u8   gain;
58
	u8   cycle;
59
} als_ctxt_t;
60

61
void set_als_cfg(als_ctxt_t *als_ctxt, u8 gain, u8 cycle);
62
void get_als_lux(als_ctxt_t *als_ctxt);
63
u8   als_power_on(als_ctxt_t *als_ctxt);
64

65
#endif /* __ALS_H_ */
66

67