/* Copyright 2015 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. * * Silicon Image SI1141/SI1142 light sensor driver */ /* * si114x.c - Support for Silabs si114x combined ambient light and * proximity sensor * * Copyright 2012 Peter Meerwald * * This file is subject to the terms and conditions of version 2 of * the GNU General Public License. See the file COPYING in the main * directory of this archive for more details. * * IIO driver for si114x (7-bit I2C slave address 0x5a) with sequencer * version >= A03 */ #ifndef __CROS_EC_ALS_SI114X_H #define __CROS_EC_ALS_SI114X_H #define SI114X_ADDR (0x5a << 1) #define SI114X_REG_PART_ID 0x00 #define SI114X_SI1141_ID 0x41 #define SI114X_SI1142_ID 0x42 #define SI114X_SI1143_ID 0x43 #define SI114X_NUM_LEDS (CONFIG_ALS_SI114X - 0x40) #define SI114X_REG_REV_ID 0x01 #define SI114X_REG_SEQ_ID 0x02 #define SI114X_REG_INT_CFG 0x03 #define SI114X_REG_IRQ_ENABLE 0x04 #define SI114X_REG_IRQ_MODE1 0x05 #define SI114X_REG_IRQ_MODE2 0x06 #define SI114X_REG_HW_KEY 0x07 /* RATE stores a 16 bit value compressed to 8 bit */ /* Not used, the sensor is in force mode */ #define SI114X_REG_MEAS_RATE 0x08 #define SI114X_REG_ALS_RATE 0x09 #define SI114X_REG_PS_RATE 0x0a #define SI114X_REG_ALS_LOW_TH0 0x0b #define SI114X_REG_ALS_LOW_TH1 0x0c #define SI114X_REG_ALS_HI_TH0 0x0d #define SI114X_REG_ALS_HI_TH1 0x0e #define SI114X_REG_PS_LED21 0x0f #define SI114X_REG_PS_LED3 0x10 /* * for rev A10 and below TH0 stores a 16 bit value compressed to 8 bit and * TH1 is not used; newer revision have the LSB in TH0 and the MSB in TH1 */ #define SI114X_REG_PS1_TH0 0x11 #define SI114X_REG_PS1_TH1 0x12 #define SI114X_REG_PS2_TH0 0x13 #define SI114X_REG_PS2_TH1 0x11 #define SI114X_REG_PS3_TH0 0x15 #define SI114X_REG_PS3_TH1 0x16 #define SI114X_REG_PARAM_WR 0x17 #define SI114X_REG_COMMAND 0x18 #define SI114X_REG_RESPONSE 0x20 #define SI114X_REG_IRQ_STATUS 0x21 #define SI114X_REG_ALSVIS_DATA0 0x22 #define SI114X_REG_ALSVIS_DATA1 0x23 #define SI114X_REG_ALSIR_DATA0 0x24 #define SI114X_REG_ALSIR_DATA1 0x25 #define SI114X_REG_PS1_DATA0 0x26 #define SI114X_REG_PS1_DATA1 0x27 #define SI114X_REG_PS2_DATA0 0x28 #define SI114X_REG_PS2_DATA1 0x29 #define SI114X_REG_PS3_DATA0 0x2a #define SI114X_REG_PS3_DATA1 0x2b #define SI114X_PS_INVERSION(_data) ((1 << 16) / (_data)) #define SI114X_REG_AUX_DATA0 0x2c #define SI114X_REG_AUX_DATA1 0x2d #define SI114X_REG_PARAM_RD 0x2e #define SI114X_REG_CHIP_STAT 0x30 /* helper to figure out PS_LED register / shift per channel */ #define SI114X_PS_LED_REG(ch) \ (((ch) == 2) ? SI114X_REG_PS_LED3 : SI114X_REG_PS_LED21) #define SI114X_PS_LED_SHIFT(ch) \ (((ch) == 1) ? 4 : 0) /* Parameter offsets */ #define SI114X_PARAM_I2C_ADDR 0x00 #define SI114X_PARAM_CHLIST 0x01 #define SI114X_PARAM_PSLED12_SELECT 0x02 #define SI114X_PARAM_PSLED3_SELECT 0x03 #define SI114X_PARAM_FILTER_EN 0x04 #define SI114X_PARAM_PS_ENCODING 0x05 #define SI114X_PARAM_ALS_ENCODING 0x06 #define SI114X_PARAM_PS1_ADC_MUX 0x07 #define SI114X_PARAM_PS2_ADC_MUX 0x08 #define SI114X_PARAM_PS3_ADC_MUX 0x09 #define SI114X_PARAM_PS_ADC_COUNTER 0x0a #define SI114X_PARAM_PS_ADC_GAIN 0x0b #define SI114X_PARAM_PS_ADC_MISC 0x0c #define SI114X_PARAM_PS_ADC_MISC_HIGH_RANGE 0x20 #define SI114X_PARAM_PS_ADC_MISC_NORMAL_MODE 0x04 #define SI114X_PARAM_ALS_ADC_MUX 0x0d #define SI114X_PARAM_ALSIR_ADC_MUX 0x0e #define SI114X_PARAM_AUX_ADC_MUX 0x0f #define SI114X_PARAM_ALSVIS_ADC_COUNTER 0x10 #define SI114X_PARAM_ALSVIS_ADC_GAIN 0x11 #define SI114X_PARAM_ALSVIS_ADC_MISC 0x12 #define SI114X_PARAM_ALS_HYST 0x16 #define SI114X_PARAM_PS_HYST 0x17 #define SI114X_PARAM_PS_HISTORY 0x18 #define SI114X_PARAM_ALS_HISTORY 0x19 #define SI114X_PARAM_ADC_OFFSET 0x1a #define SI114X_PARAM_SLEEP_CTRL 0x1b #define SI114X_PARAM_LED_RECOVERY 0x1c #define SI114X_PARAM_ALSIR_ADC_COUNTER 0x1d #define SI114X_PARAM_ALSIR_ADC_GAIN 0x1e #define SI114X_PARAM_ALSIR_ADC_MISC 0x1f /* Channel enable masks for CHLIST parameter */ #define SI114X_CHLIST_EN_PS1 0x01 #define SI114X_CHLIST_EN_PS2 0x02 #define SI114X_CHLIST_EN_PS3 0x04 #define SI114X_CHLIST_EN_ALSVIS 0x10 #define SI114X_CHLIST_EN_ALSIR 0x20 #define SI114X_CHLIST_EN_AUX 0x40 /* Signal range mask for ADC_MISC parameter */ #define SI114X_MISC_RANGE 0x20 /* Commands for REG_COMMAND */ #define SI114X_CMD_NOP 0x00 #define SI114X_CMD_RESET 0x01 #define SI114X_CMD_BUSADDR 0x02 #define SI114X_CMD_PS_FORCE 0x05 #define SI114X_CMD_ALS_FORCE 0x06 #define SI114X_CMD_PSALS_FORCE 0x07 #define SI114X_CMD_PS_PAUSE 0x09 #define SI114X_CMD_ALS_PAUSE 0x0a #define SI114X_CMD_PSALS_PAUSE 0x0b #define SI114X_CMD_PS_AUTO 0x0d #define SI114X_CMD_ALS_AUTO 0x0e #define SI114X_CMD_PSALS_AUTO 0x0f #define SI114X_CMD_PARAM_QUERY 0x80 #define SI114X_CMD_PARAM_SET 0xa0 #define SI114X_CMD_PARAM_AND 0xc0 #define SI114X_CMD_PARAM_OR 0xe0 /* Interrupt configuration masks for INT_CFG register */ #define SI114X_INT_CFG_OE 0x01 /* enable interrupt */ #define SI114X_INT_CFG_MODE 0x02 /* auto reset interrupt pin */ /* Interrupt enable masks for IRQ_ENABLE register */ #define SI114X_CMD_IE 0x20 #define SI114X_PS3_IE 0x10 #define SI114X_PS2_IE 0x08 #define SI114X_PS1_IE 0x04 #define SI114X_ALS_INT1_IE 0x02 #define SI114X_ALS_INT0_IE 0x01 #define SI114X_ALS_INT_FLAG \ (SI114X_ALS_INT1_IE | SI114X_ALS_INT0_IE) #define SI114X_PS_INT_FLAG \ (SI114X_PS3_IE | SI114X_PS2_IE | SI114X_PS1_IE) /* Interrupt mode masks for IRQ_MODE1 register */ #define SI114X_PS2_IM_GREATER 0xc0 #define SI114X_PS2_IM_CROSS 0x40 #define SI114X_PS1_IM_GREATER 0x30 #define SI114X_PS1_IM_CROSS 0x10 /* Interrupt mode masks for IRQ_MODE2 register */ #define SI114X_CMD_IM_ERROR 0x04 #define SI114X_PS3_IM_GREATER 0x03 #define SI114X_PS3_IM_CROSS 0x01 /* Measurement rate settings */ #define SI114X_MEAS_RATE_FORCED 0x00 #define SI114X_MEAS_RATE_10MS 0x84 #define SI114X_MEAS_RATE_20MS 0x94 #define SI114X_MEAS_RATE_100MS 0xb9 #define SI114X_MEAS_RATE_496MS 0xdf #define SI114X_MEAS_RATE_1984MS 0xff /* ALS rate settings relative to measurement rate */ #define SI114X_ALS_RATE_OFF 0x00 #define SI114X_ALS_RATE_1X 0x08 #define SI114X_ALS_RATE_10X 0x32 #define SI114X_ALS_RATE_100X 0x69 /* PS rate settings relative to measurement rate */ #define SI114X_PS_RATE_OFF 0x00 #define SI114X_PS_RATE_1X 0x08 #define SI114X_PS_RATE_10X 0x32 #define SI114X_PS_RATE_100X 0x69 /* Sequencer revision from SEQ_ID */ #define SI114X_SEQ_REV_A01 0x01 #define SI114X_SEQ_REV_A02 0x02 #define SI114X_SEQ_REV_A03 0x03 #define SI114X_SEQ_REV_A10 0x08 #define SI114X_SEQ_REV_A11 0x09 /* Proximity sensor finds an object within 5 cm, disable light sensor */ #define SI114X_COVERED_THRESHOLD 5 #define SI114X_OVERFLOW 0xffff /* Time to wait before re-initializing the device if access is denied */ #define SI114X_DENIED_THRESHOLD (10 * SECOND) /* Delay used for deferred callback when polling is enabled */ #define SI114x_POLLING_DELAY (8 * MSEC) /* Min and Max sampling frequency in mHz */ #define SI114X_PROX_MIN_FREQ 504 #define SI114X_PROX_MAX_FREQ 50000 #define SI114X_LIGHT_MIN_FREQ 504 #define SI114X_LIGHT_MAX_FREQ 50000 extern const struct accelgyro_drv si114x_drv; enum si114x_state { SI114X_NOT_READY, SI114X_IDLE, SI114X_ALS_IN_PROGRESS, SI114X_ALS_IN_PROGRESS_PS_PENDING, SI114X_PS_IN_PROGRESS, SI114X_PS_IN_PROGRESS_ALS_PENDING, }; /** * struct si114x_data - si114x chip state data * @client: I2C client **/ struct si114x_typed_data_t { uint8_t base_data_reg; uint8_t irq_flags; /* requested frequency, in mHz */ int rate; /* the coef is scale.uscale */ int16_t scale; uint16_t uscale; int16_t offset; }; struct si114x_drv_data_t { enum si114x_state state; uint8_t covered; struct si114x_typed_data_t type_data[2]; }; #define SI114X_GET_DATA(_s) \ ((struct si114x_drv_data_t *)(_s)->drv_data) #define SI114X_GET_TYPED_DATA(_s) \ (&SI114X_GET_DATA(_s)->type_data[(_s)->type - MOTIONSENSE_TYPE_PROX]) void si114x_interrupt(enum gpio_signal signal); #endif /* __CROS_EC_ALS_SI114X_H */