2010-10-27 01:22:37 +04:00
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/*
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* This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver.
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* Chip is combined proximity and ambient light sensor.
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*
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/i2c/bh1770glc.h>
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#include <linux/regulator/consumer.h>
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#include <linux/pm_runtime.h>
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#include <linux/workqueue.h>
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#include <linux/delay.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */
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#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */
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#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */
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#define BH1770_I_LED3 0x83 /* LED3 current setting */
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#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */
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#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */
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#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */
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#define BH1770_PART_ID 0x8a /* Part number and revision ID */
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#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */
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#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */
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#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */
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#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */
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#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */
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#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */
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#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */
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#define BH1770_INTERRUPT 0x92 /* Interrupt setting */
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#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */
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#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */
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#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */
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#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */
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#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */
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#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */
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#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */
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/* MANUFACT_ID */
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#define BH1770_MANUFACT_ROHM 0x01
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#define BH1770_MANUFACT_OSRAM 0x03
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/* PART_ID */
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#define BH1770_PART 0x90
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#define BH1770_PART_MASK 0xf0
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#define BH1770_REV_MASK 0x0f
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#define BH1770_REV_SHIFT 0
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#define BH1770_REV_0 0x00
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#define BH1770_REV_1 0x01
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/* Operating modes for both */
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#define BH1770_STANDBY 0x00
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#define BH1770_FORCED 0x02
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#define BH1770_STANDALONE 0x03
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#define BH1770_SWRESET (0x01 << 2)
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#define BH1770_PS_TRIG_MEAS (1 << 0)
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#define BH1770_ALS_TRIG_MEAS (1 << 1)
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/* Interrupt control */
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#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */
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#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */
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#define BH1770_INT_ALS_ENA (1 << 1)
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#define BH1770_INT_PS_ENA (1 << 0)
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/* Interrupt status */
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#define BH1770_INT_LED1_DATA (1 << 0)
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#define BH1770_INT_LED1_INT (1 << 1)
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#define BH1770_INT_LED2_DATA (1 << 2)
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#define BH1770_INT_LED2_INT (1 << 3)
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#define BH1770_INT_LED3_DATA (1 << 4)
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#define BH1770_INT_LED3_INT (1 << 5)
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#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5))
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#define BH1770_INT_ALS_DATA (1 << 6)
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#define BH1770_INT_ALS_INT (1 << 7)
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/* Led channels */
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#define BH1770_LED1 0x00
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#define BH1770_DISABLE 0
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#define BH1770_ENABLE 1
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#define BH1770_PROX_CHANNELS 1
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#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */
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#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */
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#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */
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#define BH1770_STARTUP_DELAY 50
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#define BH1770_RESET_TIME 10
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#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */
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#define BH1770_LUX_RANGE 65535
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#define BH1770_PROX_RANGE 255
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#define BH1770_COEF_SCALER 1024
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#define BH1770_CALIB_SCALER 8192
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#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER)
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#define BH1770_LUX_DEF_THRES 1000
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#define BH1770_PROX_DEF_THRES 70
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#define BH1770_PROX_DEF_ABS_THRES 100
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#define BH1770_DEFAULT_PERSISTENCE 10
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#define BH1770_PROX_MAX_PERSISTENCE 50
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#define BH1770_LUX_GA_SCALE 16384
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#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */
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#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE
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#define BH1770_LUX_CORR_SCALE 4096
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#define PROX_ABOVE_THRESHOLD 1
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#define PROX_BELOW_THRESHOLD 0
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#define PROX_IGNORE_LUX_LIMIT 500
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struct bh1770_chip {
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struct bh1770_platform_data *pdata;
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char chipname[10];
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u8 revision;
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struct i2c_client *client;
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struct regulator_bulk_data regs[2];
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struct mutex mutex; /* avoid parallel access */
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wait_queue_head_t wait;
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bool int_mode_prox;
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bool int_mode_lux;
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struct delayed_work prox_work;
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u32 lux_cf; /* Chip specific factor */
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u32 lux_ga;
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u32 lux_calib;
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int lux_rate_index;
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u32 lux_corr;
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u16 lux_data_raw;
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u16 lux_threshold_hi;
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u16 lux_threshold_lo;
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u16 lux_thres_hi_onchip;
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u16 lux_thres_lo_onchip;
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bool lux_wait_result;
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int prox_enable_count;
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u16 prox_coef;
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u16 prox_const;
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int prox_rate;
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int prox_rate_threshold;
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u8 prox_persistence;
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u8 prox_persistence_counter;
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u8 prox_data;
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u8 prox_threshold;
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u8 prox_threshold_hw;
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bool prox_force_update;
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u8 prox_abs_thres;
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u8 prox_led;
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};
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static const char reg_vcc[] = "Vcc";
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static const char reg_vleds[] = "Vleds";
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/*
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* Supported stand alone rates in ms from chip data sheet
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* {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000};
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*/
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static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
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static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
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/* Supported IR-led currents in mA */
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static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200};
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/*
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* Supported stand alone rates in ms from chip data sheet
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* {100, 200, 500, 1000, 2000};
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*/
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static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
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/*
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* interrupt control functions are called while keeping chip->mutex
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* excluding module probe / remove
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*/
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static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
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int lux)
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{
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chip->int_mode_lux = lux;
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/* Set interrupt modes, interrupt active low, latched */
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return i2c_smbus_write_byte_data(chip->client,
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BH1770_INTERRUPT,
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(lux << 1) | chip->int_mode_prox);
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}
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static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
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int ps)
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{
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chip->int_mode_prox = ps;
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return i2c_smbus_write_byte_data(chip->client,
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BH1770_INTERRUPT,
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(chip->int_mode_lux << 1) | (ps << 0));
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}
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/* chip->mutex is always kept here */
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static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
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{
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/* sysfs may call this when the chip is powered off */
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if (pm_runtime_suspended(&chip->client->dev))
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return 0;
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/* Proper proximity response needs fastest lux rate (100ms) */
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if (chip->prox_enable_count)
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rate_index = 0;
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return i2c_smbus_write_byte_data(chip->client,
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BH1770_ALS_MEAS_RATE,
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rate_index);
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}
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static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
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{
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int rate;
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rate = (mode == PROX_ABOVE_THRESHOLD) ?
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chip->prox_rate_threshold : chip->prox_rate;
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return i2c_smbus_write_byte_data(chip->client,
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BH1770_PS_MEAS_RATE,
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rate);
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}
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/* InfraredLED is controlled by the chip during proximity scanning */
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static inline int bh1770_led_cfg(struct bh1770_chip *chip)
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{
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/* LED cfg, current for leds 1 and 2 */
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return i2c_smbus_write_byte_data(chip->client,
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BH1770_I_LED,
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(BH1770_LED1 << 6) |
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(BH1770_LED_5mA << 3) |
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chip->prox_led);
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}
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/*
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* Following two functions converts raw ps values from HW to normalized
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* values. Purpose is to compensate differences between different sensor
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* versions and variants so that result means about the same between
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* versions.
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*/
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static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
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{
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u16 adjusted;
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adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
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BH1770_COEF_SCALER);
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if (adjusted > BH1770_PROX_RANGE)
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adjusted = BH1770_PROX_RANGE;
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return adjusted;
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}
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static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
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{
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u16 raw;
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raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
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if (raw > chip->prox_const)
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raw = raw - chip->prox_const;
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else
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raw = 0;
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return raw;
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}
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/*
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* Following two functions converts raw lux values from HW to normalized
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* values. Purpose is to compensate differences between different sensor
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* versions and variants so that result means about the same between
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* versions. Chip->mutex is kept when this is called.
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*/
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static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
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{
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u8 tmp = 0;
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/* sysfs may call this when the chip is powered off */
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if (pm_runtime_suspended(&chip->client->dev))
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return 0;
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tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
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chip->prox_threshold_hw = tmp;
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return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
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tmp);
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}
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static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
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{
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u32 lux;
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lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
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return min(lux, (u32)BH1770_LUX_RANGE);
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}
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static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
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u16 adjusted)
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{
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return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
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}
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/* chip->mutex is kept when this is called */
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static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
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u16 threshold_hi, u16 threshold_lo)
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{
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u8 data[4];
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int ret;
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/* sysfs may call this when the chip is powered off */
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if (pm_runtime_suspended(&chip->client->dev))
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return 0;
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/*
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* Compensate threshold values with the correction factors if not
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* set to minimum or maximum.
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* Min & max values disables interrupts.
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*/
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if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
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threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
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if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
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threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
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if (chip->lux_thres_hi_onchip == threshold_hi &&
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|
|
|
chip->lux_thres_lo_onchip == threshold_lo)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
chip->lux_thres_hi_onchip = threshold_hi;
|
|
|
|
chip->lux_thres_lo_onchip = threshold_lo;
|
|
|
|
|
|
|
|
data[0] = threshold_hi;
|
|
|
|
data[1] = threshold_hi >> 8;
|
|
|
|
data[2] = threshold_lo;
|
|
|
|
data[3] = threshold_lo >> 8;
|
|
|
|
|
|
|
|
ret = i2c_smbus_write_i2c_block_data(chip->client,
|
|
|
|
BH1770_ALS_TH_UP_0,
|
|
|
|
ARRAY_SIZE(data),
|
|
|
|
data);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_lux_get_result(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
u16 data;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
data = ret & 0xff;
|
|
|
|
ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
chip->lux_data_raw = data | ((ret & 0xff) << 8);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate correction value which contains chip and device specific parts */
|
|
|
|
static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
u32 tmp;
|
|
|
|
/* Impact of glass attenuation correction */
|
|
|
|
tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
|
|
|
|
/* Impact of chip factor correction */
|
|
|
|
tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
|
|
|
|
/* Impact of Device specific calibration correction */
|
|
|
|
tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
|
|
|
|
return tmp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_lux_read_result(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
bh1770_lux_get_result(chip);
|
|
|
|
return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Chip on / off functions are called while keeping mutex except probe
|
|
|
|
* or remove phase
|
|
|
|
*/
|
|
|
|
static int bh1770_chip_on(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
|
|
|
|
chip->regs);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
|
|
|
|
|
|
|
|
/* Reset the chip */
|
|
|
|
i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
|
|
|
|
BH1770_SWRESET);
|
|
|
|
usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ALS is started always since proximity needs als results
|
|
|
|
* for realibility estimation.
|
|
|
|
* Let's assume dark until the first ALS measurement is ready.
|
|
|
|
*/
|
|
|
|
chip->lux_data_raw = 0;
|
|
|
|
chip->prox_data = 0;
|
|
|
|
ret = i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_ALS_CONTROL, BH1770_STANDALONE);
|
|
|
|
|
|
|
|
/* Assume reset defaults */
|
|
|
|
chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
|
|
|
|
chip->lux_thres_lo_onchip = 0;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bh1770_chip_off(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_INTERRUPT, BH1770_DISABLE);
|
|
|
|
i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_ALS_CONTROL, BH1770_STANDBY);
|
|
|
|
i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_PS_CONTROL, BH1770_STANDBY);
|
|
|
|
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* chip->mutex is kept when this is called */
|
|
|
|
static int bh1770_prox_mode_control(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
if (chip->prox_enable_count) {
|
|
|
|
chip->prox_force_update = true; /* Force immediate update */
|
|
|
|
|
|
|
|
bh1770_lux_rate(chip, chip->lux_rate_index);
|
|
|
|
bh1770_prox_set_threshold(chip);
|
|
|
|
bh1770_led_cfg(chip);
|
|
|
|
bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
|
|
|
|
bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
|
|
|
|
i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_PS_CONTROL, BH1770_STANDALONE);
|
|
|
|
} else {
|
|
|
|
chip->prox_data = 0;
|
|
|
|
bh1770_lux_rate(chip, chip->lux_rate_index);
|
|
|
|
bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
|
|
|
|
i2c_smbus_write_byte_data(chip->client,
|
|
|
|
BH1770_PS_CONTROL, BH1770_STANDBY);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* chip->mutex is kept when this is called */
|
|
|
|
static int bh1770_prox_read_result(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
bool above;
|
|
|
|
u8 mode;
|
|
|
|
|
|
|
|
ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
|
|
|
|
if (ret < 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (ret > chip->prox_threshold_hw)
|
|
|
|
above = true;
|
|
|
|
else
|
|
|
|
above = false;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* when ALS levels goes above limit, proximity result may be
|
|
|
|
* false proximity. Thus ignore the result. With real proximity
|
|
|
|
* there is a shadow causing low als levels.
|
|
|
|
*/
|
|
|
|
if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
|
|
|
|
|
|
|
|
/* Strong proximity level or force mode requires immediate response */
|
|
|
|
if (chip->prox_data >= chip->prox_abs_thres ||
|
|
|
|
chip->prox_force_update)
|
|
|
|
chip->prox_persistence_counter = chip->prox_persistence;
|
|
|
|
|
|
|
|
chip->prox_force_update = false;
|
|
|
|
|
|
|
|
/* Persistence filttering to reduce false proximity events */
|
|
|
|
if (likely(above)) {
|
|
|
|
if (chip->prox_persistence_counter < chip->prox_persistence) {
|
|
|
|
chip->prox_persistence_counter++;
|
|
|
|
ret = -ENODATA;
|
|
|
|
} else {
|
|
|
|
mode = PROX_ABOVE_THRESHOLD;
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
chip->prox_persistence_counter = 0;
|
|
|
|
mode = PROX_BELOW_THRESHOLD;
|
|
|
|
chip->prox_data = 0;
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set proximity detection rate based on above or below value */
|
|
|
|
if (ret == 0) {
|
|
|
|
bh1770_prox_rate(chip, mode);
|
|
|
|
sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_detect(struct bh1770_chip *chip)
|
|
|
|
{
|
|
|
|
struct i2c_client *client = chip->client;
|
|
|
|
s32 ret;
|
|
|
|
u8 manu, part;
|
|
|
|
|
|
|
|
ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
manu = (u8)ret;
|
|
|
|
|
|
|
|
ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
part = (u8)ret;
|
|
|
|
|
|
|
|
chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
|
|
|
|
chip->prox_coef = BH1770_COEF_SCALER;
|
|
|
|
chip->prox_const = 0;
|
|
|
|
chip->lux_cf = BH1770_NEUTRAL_CF;
|
|
|
|
|
|
|
|
if ((manu == BH1770_MANUFACT_ROHM) &&
|
|
|
|
((part & BH1770_PART_MASK) == BH1770_PART)) {
|
|
|
|
snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((manu == BH1770_MANUFACT_OSRAM) &&
|
|
|
|
((part & BH1770_PART_MASK) == BH1770_PART)) {
|
|
|
|
snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
|
|
|
|
/* Values selected by comparing different versions */
|
|
|
|
chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
|
|
|
|
chip->prox_const = 40;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = -ENODEV;
|
|
|
|
error:
|
|
|
|
dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This work is re-scheduled at every proximity interrupt.
|
|
|
|
* If this work is running, it means that there hasn't been any
|
|
|
|
* proximity interrupt in time. Situation is handled as no-proximity.
|
|
|
|
* It would be nice to have low-threshold interrupt or interrupt
|
|
|
|
* when measurement and hi-threshold are both 0. But neither of those exists.
|
|
|
|
* This is a workaroud for missing HW feature.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void bh1770_prox_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip =
|
|
|
|
container_of(work, struct bh1770_chip, prox_work.work);
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
bh1770_prox_read_result(chip);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is threaded irq handler */
|
|
|
|
static irqreturn_t bh1770_irq(int irq, void *data)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = data;
|
|
|
|
int status;
|
|
|
|
int rate = 0;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
|
|
|
|
|
|
|
|
/* Acknowledge interrupt by reading this register */
|
|
|
|
i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check if there is fresh data available for als.
|
|
|
|
* If this is the very first data, update thresholds after that.
|
|
|
|
*/
|
|
|
|
if (status & BH1770_INT_ALS_DATA) {
|
|
|
|
bh1770_lux_get_result(chip);
|
|
|
|
if (unlikely(chip->lux_wait_result)) {
|
|
|
|
chip->lux_wait_result = false;
|
|
|
|
wake_up(&chip->wait);
|
|
|
|
bh1770_lux_update_thresholds(chip,
|
|
|
|
chip->lux_threshold_hi,
|
|
|
|
chip->lux_threshold_lo);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Disable interrupt logic to guarantee acknowledgement */
|
|
|
|
i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
|
|
|
|
(0 << 1) | (0 << 0));
|
|
|
|
|
|
|
|
if ((status & BH1770_INT_ALS_INT))
|
|
|
|
sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
|
|
|
|
|
|
|
|
if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
|
|
|
|
rate = prox_rates_ms[chip->prox_rate_threshold];
|
|
|
|
bh1770_prox_read_result(chip);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Re-enable interrupt logic */
|
|
|
|
i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
|
|
|
|
(chip->int_mode_lux << 1) |
|
|
|
|
(chip->int_mode_prox << 0));
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Can't cancel work while keeping mutex since the work uses the
|
|
|
|
* same mutex.
|
|
|
|
*/
|
|
|
|
if (rate) {
|
|
|
|
/*
|
|
|
|
* Simulate missing no-proximity interrupt 50ms after the
|
|
|
|
* next expected interrupt time.
|
|
|
|
*/
|
|
|
|
cancel_delayed_work_sync(&chip->prox_work);
|
|
|
|
schedule_delayed_work(&chip->prox_work,
|
|
|
|
msecs_to_jiffies(rate + 50));
|
|
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_power_state_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2010-11-12 01:05:13 +03:00
|
|
|
ssize_t ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
if (value) {
|
|
|
|
pm_runtime_get_sync(dev);
|
|
|
|
|
|
|
|
ret = bh1770_lux_rate(chip, chip->lux_rate_index);
|
2010-11-12 01:05:13 +03:00
|
|
|
if (ret < 0) {
|
|
|
|
pm_runtime_put(dev);
|
|
|
|
goto leave;
|
|
|
|
}
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2010-11-12 01:05:13 +03:00
|
|
|
ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
|
2010-10-27 01:22:37 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
pm_runtime_put(dev);
|
|
|
|
goto leave;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This causes interrupt after the next measurement cycle */
|
|
|
|
bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
|
|
|
|
BH1770_LUX_DEF_THRES);
|
|
|
|
/* Inform that we are waiting for a result from ALS */
|
|
|
|
chip->lux_wait_result = true;
|
|
|
|
bh1770_prox_mode_control(chip);
|
|
|
|
} else if (!pm_runtime_suspended(dev)) {
|
|
|
|
pm_runtime_put(dev);
|
|
|
|
}
|
|
|
|
ret = count;
|
|
|
|
leave:
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_power_state_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_lux_result_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
ssize_t ret;
|
|
|
|
long timeout;
|
|
|
|
|
|
|
|
if (pm_runtime_suspended(dev))
|
|
|
|
return -EIO; /* Chip is not enabled at all */
|
|
|
|
|
|
|
|
timeout = wait_event_interruptible_timeout(chip->wait,
|
|
|
|
!chip->lux_wait_result,
|
|
|
|
msecs_to_jiffies(BH1770_TIMEOUT));
|
|
|
|
if (!timeout)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_lux_range_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_enable_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
/* Assume no proximity. Sensor will tell real state soon */
|
|
|
|
if (!chip->prox_enable_count)
|
|
|
|
chip->prox_data = 0;
|
|
|
|
|
|
|
|
if (value)
|
|
|
|
chip->prox_enable_count++;
|
|
|
|
else if (chip->prox_enable_count > 0)
|
|
|
|
chip->prox_enable_count--;
|
|
|
|
else
|
|
|
|
goto leave;
|
|
|
|
|
|
|
|
/* Run control only when chip is powered on */
|
|
|
|
if (!pm_runtime_suspended(dev))
|
|
|
|
bh1770_prox_mode_control(chip);
|
|
|
|
leave:
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_enable_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
ssize_t len;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
len = sprintf(buf, "%d\n", chip->prox_enable_count);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_result_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
if (chip->prox_enable_count && !pm_runtime_suspended(dev))
|
|
|
|
ret = sprintf(buf, "%d\n", chip->prox_data);
|
|
|
|
else
|
|
|
|
ret = -EIO;
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_range_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
return sprintf(buf, "%d\n", BH1770_PROX_RANGE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_prox_rate_avail(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int pos = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++)
|
|
|
|
pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]);
|
|
|
|
sprintf(buf + pos - 1, "\n");
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_prox_rate_above(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_prox_rate_below(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_prox_rate_validate(int rate)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++)
|
|
|
|
if (rate >= prox_rates_hz[i])
|
|
|
|
break;
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_prox_rate_above(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_prox_rate_below(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
chip->prox_rate = bh1770_prox_rate_validate(value);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_prox_thres(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", chip->prox_threshold);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_prox_thres(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
|
|
|
int ret;
|
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2010-10-27 01:22:37 +04:00
|
|
|
if (value > BH1770_PROX_RANGE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
chip->prox_threshold = value;
|
|
|
|
ret = bh1770_prox_set_threshold(chip);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_persistence_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
return sprintf(buf, "%u\n", chip->prox_persistence);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_persistence_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
if (value > BH1770_PROX_MAX_PERSISTENCE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
chip->prox_persistence = value;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%u\n", chip->prox_abs_thres);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
if (value > BH1770_PROX_RANGE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
chip->prox_abs_thres = value;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_chip_id_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_lux_calib_default_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_lux_calib_show(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
ssize_t len;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
len = sprintf(buf, "%u\n", chip->lux_calib);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_lux_calib_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long value;
|
|
|
|
u32 old_calib;
|
|
|
|
u32 new_corr;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &value);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
old_calib = chip->lux_calib;
|
|
|
|
chip->lux_calib = value;
|
|
|
|
new_corr = bh1770_get_corr_value(chip);
|
|
|
|
if (new_corr == 0) {
|
|
|
|
chip->lux_calib = old_calib;
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
chip->lux_corr = new_corr;
|
|
|
|
/* Refresh thresholds on HW after changing correction value */
|
|
|
|
bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
|
|
|
|
chip->lux_threshold_lo);
|
|
|
|
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int pos = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
|
|
|
|
pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
|
|
|
|
sprintf(buf + pos - 1, "\n");
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_lux_rate(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_lux_rate(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
unsigned long rate_hz;
|
|
|
|
int ret, i;
|
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &rate_hz);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
|
|
|
|
if (rate_hz >= lux_rates_hz[i])
|
|
|
|
break;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
chip->lux_rate_index = i;
|
|
|
|
ret = bh1770_lux_rate(chip, i);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", chip->lux_threshold_hi);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", chip->lux_threshold_lo);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
|
|
|
|
const char *buf)
|
|
|
|
{
|
|
|
|
unsigned long thresh;
|
2013-06-04 08:15:16 +04:00
|
|
|
int ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
2013-06-04 08:15:16 +04:00
|
|
|
ret = kstrtoul(buf, 0, &thresh);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
if (thresh > BH1770_LUX_RANGE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
*target = thresh;
|
|
|
|
/*
|
|
|
|
* Don't update values in HW if we are still waiting for
|
|
|
|
* first interrupt to come after device handle open call.
|
|
|
|
*/
|
|
|
|
if (!chip->lux_wait_result)
|
|
|
|
ret = bh1770_lux_update_thresholds(chip,
|
|
|
|
chip->lux_threshold_hi,
|
|
|
|
chip->lux_threshold_lo);
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_lux_thresh_above(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t bh1770_set_lux_thresh_below(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = dev_get_drvdata(dev);
|
|
|
|
int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
|
|
|
|
bh1770_prox_enable_store);
|
|
|
|
static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_prox_abs_thres_show,
|
|
|
|
bh1770_prox_abs_thres_store);
|
|
|
|
static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_get_prox_thres,
|
|
|
|
bh1770_set_prox_thres);
|
|
|
|
static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
|
|
|
|
static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
|
|
|
|
static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_prox_persistence_show,
|
|
|
|
bh1770_prox_persistence_store);
|
|
|
|
static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_get_prox_rate_above,
|
|
|
|
bh1770_set_prox_rate_above);
|
|
|
|
static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_get_prox_rate_below,
|
|
|
|
bh1770_set_prox_rate_below);
|
|
|
|
static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
|
|
|
|
|
|
|
|
static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
|
|
|
|
bh1770_lux_calib_store);
|
|
|
|
static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
|
|
|
|
bh1770_lux_calib_default_show,
|
|
|
|
NULL);
|
|
|
|
static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
|
|
|
|
static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
|
|
|
|
static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
|
|
|
|
bh1770_set_lux_rate);
|
|
|
|
static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
|
|
|
|
static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_get_lux_thresh_above,
|
|
|
|
bh1770_set_lux_thresh_above);
|
|
|
|
static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
|
|
|
|
bh1770_get_lux_thresh_below,
|
|
|
|
bh1770_set_lux_thresh_below);
|
|
|
|
static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
|
|
|
|
static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
|
|
|
|
bh1770_power_state_store);
|
|
|
|
|
|
|
|
|
|
|
|
static struct attribute *sysfs_attrs[] = {
|
|
|
|
&dev_attr_lux0_calibscale.attr,
|
|
|
|
&dev_attr_lux0_calibscale_default.attr,
|
|
|
|
&dev_attr_lux0_input.attr,
|
|
|
|
&dev_attr_lux0_sensor_range.attr,
|
|
|
|
&dev_attr_lux0_rate.attr,
|
|
|
|
&dev_attr_lux0_rate_avail.attr,
|
|
|
|
&dev_attr_lux0_thresh_above_value.attr,
|
|
|
|
&dev_attr_lux0_thresh_below_value.attr,
|
|
|
|
&dev_attr_prox0_raw.attr,
|
|
|
|
&dev_attr_prox0_sensor_range.attr,
|
|
|
|
&dev_attr_prox0_raw_en.attr,
|
|
|
|
&dev_attr_prox0_thresh_above_count.attr,
|
|
|
|
&dev_attr_prox0_rate_above.attr,
|
|
|
|
&dev_attr_prox0_rate_below.attr,
|
|
|
|
&dev_attr_prox0_rate_avail.attr,
|
|
|
|
&dev_attr_prox0_thresh_above0_value.attr,
|
|
|
|
&dev_attr_prox0_thresh_above1_value.attr,
|
|
|
|
&dev_attr_chip_id.attr,
|
|
|
|
&dev_attr_power_state.attr,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct attribute_group bh1770_attribute_group = {
|
|
|
|
.attrs = sysfs_attrs
|
|
|
|
};
|
|
|
|
|
2012-11-19 22:23:05 +04:00
|
|
|
static int bh1770_probe(struct i2c_client *client,
|
2010-10-27 01:22:37 +04:00
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
|
|
|
struct bh1770_chip *chip;
|
|
|
|
int err;
|
|
|
|
|
2014-07-21 12:25:35 +04:00
|
|
|
chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL);
|
2010-10-27 01:22:37 +04:00
|
|
|
if (!chip)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
chip->client = client;
|
|
|
|
|
|
|
|
mutex_init(&chip->mutex);
|
|
|
|
init_waitqueue_head(&chip->wait);
|
|
|
|
INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work);
|
|
|
|
|
|
|
|
if (client->dev.platform_data == NULL) {
|
|
|
|
dev_err(&client->dev, "platform data is mandatory\n");
|
2014-07-21 12:25:35 +04:00
|
|
|
return -EINVAL;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
chip->pdata = client->dev.platform_data;
|
|
|
|
chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE;
|
|
|
|
chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE;
|
|
|
|
chip->lux_threshold_lo = BH1770_LUX_DEF_THRES;
|
|
|
|
chip->lux_threshold_hi = BH1770_LUX_DEF_THRES;
|
|
|
|
|
|
|
|
if (chip->pdata->glass_attenuation == 0)
|
|
|
|
chip->lux_ga = BH1770_NEUTRAL_GA;
|
|
|
|
else
|
|
|
|
chip->lux_ga = chip->pdata->glass_attenuation;
|
|
|
|
|
|
|
|
chip->prox_threshold = BH1770_PROX_DEF_THRES;
|
|
|
|
chip->prox_led = chip->pdata->led_def_curr;
|
|
|
|
chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES;
|
|
|
|
chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE;
|
|
|
|
chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
|
|
|
|
chip->prox_rate = BH1770_PROX_DEFAULT_RATE;
|
|
|
|
chip->prox_data = 0;
|
|
|
|
|
|
|
|
chip->regs[0].supply = reg_vcc;
|
|
|
|
chip->regs[1].supply = reg_vleds;
|
|
|
|
|
2014-07-21 12:25:35 +04:00
|
|
|
err = devm_regulator_bulk_get(&client->dev,
|
|
|
|
ARRAY_SIZE(chip->regs), chip->regs);
|
2010-10-27 01:22:37 +04:00
|
|
|
if (err < 0) {
|
|
|
|
dev_err(&client->dev, "Cannot get regulators\n");
|
2014-07-21 12:25:35 +04:00
|
|
|
return err;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
|
|
|
|
chip->regs);
|
|
|
|
if (err < 0) {
|
|
|
|
dev_err(&client->dev, "Cannot enable regulators\n");
|
2014-07-21 12:25:35 +04:00
|
|
|
return err;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
|
|
|
|
err = bh1770_detect(chip);
|
|
|
|
if (err < 0)
|
2014-07-21 12:25:35 +04:00
|
|
|
goto fail0;
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
/* Start chip */
|
|
|
|
bh1770_chip_on(chip);
|
|
|
|
pm_runtime_set_active(&client->dev);
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
|
|
|
|
|
|
chip->lux_corr = bh1770_get_corr_value(chip);
|
|
|
|
if (chip->lux_corr == 0) {
|
|
|
|
dev_err(&client->dev, "Improper correction values\n");
|
|
|
|
err = -EINVAL;
|
2014-07-21 12:25:35 +04:00
|
|
|
goto fail0;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
if (chip->pdata->setup_resources) {
|
|
|
|
err = chip->pdata->setup_resources();
|
|
|
|
if (err) {
|
|
|
|
err = -EINVAL;
|
2014-07-21 12:25:35 +04:00
|
|
|
goto fail0;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
err = sysfs_create_group(&chip->client->dev.kobj,
|
|
|
|
&bh1770_attribute_group);
|
|
|
|
if (err < 0) {
|
|
|
|
dev_err(&chip->client->dev, "Sysfs registration failed\n");
|
2014-07-21 12:25:35 +04:00
|
|
|
goto fail1;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Chip needs level triggered interrupt to work. However,
|
|
|
|
* level triggering doesn't work always correctly with power
|
|
|
|
* management. Select both
|
|
|
|
*/
|
|
|
|
err = request_threaded_irq(client->irq, NULL,
|
|
|
|
bh1770_irq,
|
|
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
|
|
|
|
IRQF_TRIGGER_LOW,
|
|
|
|
"bh1770", chip);
|
|
|
|
if (err) {
|
|
|
|
dev_err(&client->dev, "could not get IRQ %d\n",
|
|
|
|
client->irq);
|
2014-07-21 12:25:35 +04:00
|
|
|
goto fail2;
|
2010-10-27 01:22:37 +04:00
|
|
|
}
|
|
|
|
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
|
|
|
|
return err;
|
2014-07-21 12:25:35 +04:00
|
|
|
fail2:
|
2010-10-27 01:22:37 +04:00
|
|
|
sysfs_remove_group(&chip->client->dev.kobj,
|
|
|
|
&bh1770_attribute_group);
|
2014-07-21 12:25:35 +04:00
|
|
|
fail1:
|
2010-10-27 01:22:37 +04:00
|
|
|
if (chip->pdata->release_resources)
|
|
|
|
chip->pdata->release_resources();
|
2014-07-21 12:25:35 +04:00
|
|
|
fail0:
|
2010-10-27 01:22:37 +04:00
|
|
|
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2012-11-19 22:26:02 +04:00
|
|
|
static int bh1770_remove(struct i2c_client *client)
|
2010-10-27 01:22:37 +04:00
|
|
|
{
|
|
|
|
struct bh1770_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
free_irq(client->irq, chip);
|
|
|
|
|
|
|
|
sysfs_remove_group(&chip->client->dev.kobj,
|
|
|
|
&bh1770_attribute_group);
|
|
|
|
|
|
|
|
if (chip->pdata->release_resources)
|
|
|
|
chip->pdata->release_resources();
|
|
|
|
|
|
|
|
cancel_delayed_work_sync(&chip->prox_work);
|
|
|
|
|
|
|
|
if (!pm_runtime_suspended(&client->dev))
|
|
|
|
bh1770_chip_off(chip);
|
|
|
|
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
|
|
pm_runtime_set_suspended(&client->dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-03-26 11:05:36 +04:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
2010-10-27 01:22:37 +04:00
|
|
|
static int bh1770_suspend(struct device *dev)
|
|
|
|
{
|
2015-12-28 18:00:16 +03:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-10-27 01:22:37 +04:00
|
|
|
struct bh1770_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
bh1770_chip_off(chip);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_resume(struct device *dev)
|
|
|
|
{
|
2015-12-28 18:00:16 +03:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-10-27 01:22:37 +04:00
|
|
|
struct bh1770_chip *chip = i2c_get_clientdata(client);
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
bh1770_chip_on(chip);
|
|
|
|
|
|
|
|
if (!pm_runtime_suspended(dev)) {
|
|
|
|
/*
|
|
|
|
* If we were enabled at suspend time, it is expected
|
|
|
|
* everything works nice and smoothly
|
|
|
|
*/
|
|
|
|
ret = bh1770_lux_rate(chip, chip->lux_rate_index);
|
|
|
|
ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
|
|
|
|
|
|
|
|
/* This causes interrupt after the next measurement cycle */
|
|
|
|
bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
|
|
|
|
BH1770_LUX_DEF_THRES);
|
|
|
|
/* Inform that we are waiting for a result from ALS */
|
|
|
|
chip->lux_wait_result = true;
|
|
|
|
bh1770_prox_mode_control(chip);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2014-12-05 00:43:07 +03:00
|
|
|
#ifdef CONFIG_PM
|
2010-10-27 01:22:37 +04:00
|
|
|
static int bh1770_runtime_suspend(struct device *dev)
|
|
|
|
{
|
2015-12-28 18:00:16 +03:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-10-27 01:22:37 +04:00
|
|
|
struct bh1770_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
bh1770_chip_off(chip);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int bh1770_runtime_resume(struct device *dev)
|
|
|
|
{
|
2015-12-28 18:00:16 +03:00
|
|
|
struct i2c_client *client = to_i2c_client(dev);
|
2010-10-27 01:22:37 +04:00
|
|
|
struct bh1770_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
bh1770_chip_on(chip);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static const struct i2c_device_id bh1770_id[] = {
|
|
|
|
{"bh1770glc", 0 },
|
|
|
|
{"sfh7770", 0 },
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(i2c, bh1770_id);
|
|
|
|
|
|
|
|
static const struct dev_pm_ops bh1770_pm_ops = {
|
|
|
|
SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
|
|
|
|
SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct i2c_driver bh1770_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "bh1770glc",
|
|
|
|
.pm = &bh1770_pm_ops,
|
|
|
|
},
|
|
|
|
.probe = bh1770_probe,
|
2012-11-19 22:21:23 +04:00
|
|
|
.remove = bh1770_remove,
|
2010-10-27 01:22:37 +04:00
|
|
|
.id_table = bh1770_id,
|
|
|
|
};
|
|
|
|
|
2012-01-22 11:36:45 +04:00
|
|
|
module_i2c_driver(bh1770_driver);
|
2010-10-27 01:22:37 +04:00
|
|
|
|
|
|
|
MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
|
|
|
|
MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
|
|
|
|
MODULE_LICENSE("GPL v2");
|