path: root/drivers/misc/bh1770glc.c

/*
 * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver.
 * Chip is combined proximity and ambient light sensor.
 *
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 *
 * Contact: Samu Onkalo <samu.p.onkalo@nokia.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
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/i2c/bh1770glc.h>
#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/slab.h>

#define BH1770_ALS_CONTROL	0x80 /* ALS operation mode control */
#define BH1770_PS_CONTROL	0x81 /* PS operation mode control */
#define BH1770_I_LED		0x82 /* active LED and LED1, LED2 current */
#define BH1770_I_LED3		0x83 /* LED3 current setting */
#define BH1770_ALS_PS_MEAS	0x84 /* Forced mode trigger */
#define BH1770_PS_MEAS_RATE	0x85 /* PS meas. rate at stand alone mode */
#define BH1770_ALS_MEAS_RATE	0x86 /* ALS meas. rate at stand alone mode */
#define BH1770_PART_ID		0x8a /* Part number and revision ID */
#define BH1770_MANUFACT_ID	0x8b /* Manufacturerer ID */
#define BH1770_ALS_DATA_0	0x8c /* ALS DATA low byte */
#define BH1770_ALS_DATA_1	0x8d /* ALS DATA high byte */
#define BH1770_ALS_PS_STATUS	0x8e /* Measurement data and int status */
#define BH1770_PS_DATA_LED1	0x8f /* PS data from LED1 */
#define BH1770_PS_DATA_LED2	0x90 /* PS data from LED2 */
#define BH1770_PS_DATA_LED3	0x91 /* PS data from LED3 */
#define BH1770_INTERRUPT	0x92 /* Interrupt setting */
#define BH1770_PS_TH_LED1	0x93 /* PS interrupt threshold for LED1 */
#define BH1770_PS_TH_LED2	0x94 /* PS interrupt threshold for LED2 */
#define BH1770_PS_TH_LED3	0x95 /* PS interrupt threshold for LED3 */
#define BH1770_ALS_TH_UP_0	0x96 /* ALS upper threshold low byte */
#define BH1770_ALS_TH_UP_1	0x97 /* ALS upper threshold high byte */
#define BH1770_ALS_TH_LOW_0	0x98 /* ALS lower threshold low byte */
#define BH1770_ALS_TH_LOW_1	0x99 /* ALS lower threshold high byte */

/* MANUFACT_ID */
#define BH1770_MANUFACT_ROHM	0x01
#define BH1770_MANUFACT_OSRAM	0x03

/* PART_ID */
#define BH1770_PART		0x90
#define BH1770_PART_MASK	0xf0
#define BH1770_REV_MASK		0x0f
#define BH1770_REV_SHIFT	0
#define BH1770_REV_0		0x00
#define BH1770_REV_1		0x01

/* Operating modes for both */
#define BH1770_STANDBY		0x00
#define BH1770_FORCED		0x02
#define BH1770_STANDALONE	0x03
#define BH1770_SWRESET		(0x01 << 2)

#define BH1770_PS_TRIG_MEAS	(1 << 0)
#define BH1770_ALS_TRIG_MEAS	(1 << 1)

/* Interrupt control */
#define BH1770_INT_OUTPUT_MODE	(1 << 3) /* 0 = latched */
#define BH1770_INT_POLARITY	(1 << 2) /* 1 = active high */
#define BH1770_INT_ALS_ENA	(1 << 1)
#define BH1770_INT_PS_ENA	(1 << 0)

/* Interrupt status */
#define BH1770_INT_LED1_DATA	(1 << 0)
#define BH1770_INT_LED1_INT	(1 << 1)
#define BH1770_INT_LED2_DATA	(1 << 2)
#define BH1770_INT_LED2_INT	(1 << 3)
#define BH1770_INT_LED3_DATA	(1 << 4)
#define BH1770_INT_LED3_INT	(1 << 5)
#define BH1770_INT_LEDS_INT	((1 << 1) | (1 << 3) | (1 << 5))
#define BH1770_INT_ALS_DATA	(1 << 6)
#define BH1770_INT_ALS_INT	(1 << 7)

/* Led channels */
#define BH1770_LED1		0x00

#define BH1770_DISABLE		0
#define BH1770_ENABLE		1
#define BH1770_PROX_CHANNELS	1

#define BH1770_LUX_DEFAULT_RATE	1 /* Index to lux rate table */
#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */