| /* |
| * Copyright (C) 2013 Samsung Electronics Co., Ltd. |
| * Author: Jacek Anaszewski <j.anaszewski@samsung.com> |
| * |
| * IIO features supported by the driver: |
| * |
| * Read-only raw channels: |
| * - illuminance_clear [lux] |
| * - illuminance_ir |
| * - proximity |
| * |
| * Triggered buffer: |
| * - illuminance_clear |
| * - illuminance_ir |
| * - proximity |
| * |
| * Events: |
| * - illuminance_clear (rising and falling) |
| * - proximity (rising and falling) |
| * - both falling and rising thresholds for the proximity events |
| * must be set to the values greater than 0. |
| * |
| * The driver supports triggered buffers for all the three |
| * channels as well as high and low threshold events for the |
| * illuminance_clear and proxmimity channels. Triggers |
| * can be enabled simultaneously with both illuminance_clear |
| * events. Proximity events cannot be enabled simultaneously |
| * with any triggers or illuminance events. Enabling/disabling |
| * one of the proximity events automatically enables/disables |
| * the other one. |
| * |
| * 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. |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/delay.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/irq_work.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/of.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/iio/buffer.h> |
| #include <linux/iio/events.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/sysfs.h> |
| #include <linux/iio/trigger.h> |
| #include <linux/iio/trigger_consumer.h> |
| #include <linux/iio/triggered_buffer.h> |
| |
| #define GP2A_I2C_NAME "gp2ap020a00f" |
| |
| /* Registers */ |
| #define GP2AP020A00F_OP_REG 0x00 /* Basic operations */ |
| #define GP2AP020A00F_ALS_REG 0x01 /* ALS related settings */ |
| #define GP2AP020A00F_PS_REG 0x02 /* PS related settings */ |
| #define GP2AP020A00F_LED_REG 0x03 /* LED reg */ |
| #define GP2AP020A00F_TL_L_REG 0x04 /* ALS: Threshold low LSB */ |
| #define GP2AP020A00F_TL_H_REG 0x05 /* ALS: Threshold low MSB */ |
| #define GP2AP020A00F_TH_L_REG 0x06 /* ALS: Threshold high LSB */ |
| #define GP2AP020A00F_TH_H_REG 0x07 /* ALS: Threshold high MSB */ |
| #define GP2AP020A00F_PL_L_REG 0x08 /* PS: Threshold low LSB */ |
| #define GP2AP020A00F_PL_H_REG 0x09 /* PS: Threshold low MSB */ |
| #define GP2AP020A00F_PH_L_REG 0x0a /* PS: Threshold high LSB */ |
| #define GP2AP020A00F_PH_H_REG 0x0b /* PS: Threshold high MSB */ |
| #define GP2AP020A00F_D0_L_REG 0x0c /* ALS result: Clear/Illuminance LSB */ |
| #define GP2AP020A00F_D0_H_REG 0x0d /* ALS result: Clear/Illuminance MSB */ |
| #define GP2AP020A00F_D1_L_REG 0x0e /* ALS result: IR LSB */ |
| #define GP2AP020A00F_D1_H_REG 0x0f /* ALS result: IR LSB */ |
| #define GP2AP020A00F_D2_L_REG 0x10 /* PS result LSB */ |
| #define GP2AP020A00F_D2_H_REG 0x11 /* PS result MSB */ |
| #define GP2AP020A00F_NUM_REGS 0x12 /* Number of registers */ |
| |
| /* OP_REG bits */ |
| #define GP2AP020A00F_OP3_MASK 0x80 /* Software shutdown */ |
| #define GP2AP020A00F_OP3_SHUTDOWN 0x00 |
| #define GP2AP020A00F_OP3_OPERATION 0x80 |
| #define GP2AP020A00F_OP2_MASK 0x40 /* Auto shutdown/Continuous mode */ |
| #define GP2AP020A00F_OP2_AUTO_SHUTDOWN 0x00 |
| #define GP2AP020A00F_OP2_CONT_OPERATION 0x40 |
| #define GP2AP020A00F_OP_MASK 0x30 /* Operating mode selection */ |
| #define GP2AP020A00F_OP_ALS_AND_PS 0x00 |
| #define GP2AP020A00F_OP_ALS 0x10 |
| #define GP2AP020A00F_OP_PS 0x20 |
| #define GP2AP020A00F_OP_DEBUG 0x30 |
| #define GP2AP020A00F_PROX_MASK 0x08 /* PS: detection/non-detection */ |
| #define GP2AP020A00F_PROX_NON_DETECT 0x00 |
| #define GP2AP020A00F_PROX_DETECT 0x08 |
| #define GP2AP020A00F_FLAG_P 0x04 /* PS: interrupt result */ |
| #define GP2AP020A00F_FLAG_A 0x02 /* ALS: interrupt result */ |
| #define GP2AP020A00F_TYPE_MASK 0x01 /* Output data type selection */ |
| #define GP2AP020A00F_TYPE_MANUAL_CALC 0x00 |
| #define GP2AP020A00F_TYPE_AUTO_CALC 0x01 |
| |
| /* ALS_REG bits */ |
| #define GP2AP020A00F_PRST_MASK 0xc0 /* Number of measurement cycles */ |
| #define GP2AP020A00F_PRST_ONCE 0x00 |
| #define GP2AP020A00F_PRST_4_CYCLES 0x40 |
| #define GP2AP020A00F_PRST_8_CYCLES 0x80 |
| #define GP2AP020A00F_PRST_16_CYCLES 0xc0 |
| #define GP2AP020A00F_RES_A_MASK 0x38 /* ALS: Resolution */ |
| #define GP2AP020A00F_RES_A_800ms 0x00 |
| #define GP2AP020A00F_RES_A_400ms 0x08 |
| #define GP2AP020A00F_RES_A_200ms 0x10 |
| #define GP2AP020A00F_RES_A_100ms 0x18 |
| #define GP2AP020A00F_RES_A_25ms 0x20 |
| #define GP2AP020A00F_RES_A_6_25ms 0x28 |
| #define GP2AP020A00F_RES_A_1_56ms 0x30 |
| #define GP2AP020A00F_RES_A_0_39ms 0x38 |
| #define GP2AP020A00F_RANGE_A_MASK 0x07 /* ALS: Max measurable range */ |
| #define GP2AP020A00F_RANGE_A_x1 0x00 |
| #define GP2AP020A00F_RANGE_A_x2 0x01 |
| #define GP2AP020A00F_RANGE_A_x4 0x02 |
| #define GP2AP020A00F_RANGE_A_x8 0x03 |
| #define GP2AP020A00F_RANGE_A_x16 0x04 |
| #define GP2AP020A00F_RANGE_A_x32 0x05 |
| #define GP2AP020A00F_RANGE_A_x64 0x06 |
| #define GP2AP020A00F_RANGE_A_x128 0x07 |
| |
| /* PS_REG bits */ |
| #define GP2AP020A00F_ALC_MASK 0x80 /* Auto light cancel */ |
| #define GP2AP020A00F_ALC_ON 0x80 |
| #define GP2AP020A00F_ALC_OFF 0x00 |
| #define GP2AP020A00F_INTTYPE_MASK 0x40 /* Interrupt type setting */ |
| #define GP2AP020A00F_INTTYPE_LEVEL 0x00 |
| #define GP2AP020A00F_INTTYPE_PULSE 0x40 |
| #define GP2AP020A00F_RES_P_MASK 0x38 /* PS: Resolution */ |
| #define GP2AP020A00F_RES_P_800ms_x2 0x00 |
| #define GP2AP020A00F_RES_P_400ms_x2 0x08 |
| #define GP2AP020A00F_RES_P_200ms_x2 0x10 |
| #define GP2AP020A00F_RES_P_100ms_x2 0x18 |
| #define GP2AP020A00F_RES_P_25ms_x2 0x20 |
| #define GP2AP020A00F_RES_P_6_25ms_x2 0x28 |
| #define GP2AP020A00F_RES_P_1_56ms_x2 0x30 |
| #define GP2AP020A00F_RES_P_0_39ms_x2 0x38 |
| #define GP2AP020A00F_RANGE_P_MASK 0x07 /* PS: Max measurable range */ |
| #define GP2AP020A00F_RANGE_P_x1 0x00 |
| #define GP2AP020A00F_RANGE_P_x2 0x01 |
| #define GP2AP020A00F_RANGE_P_x4 0x02 |
| #define GP2AP020A00F_RANGE_P_x8 0x03 |
| #define GP2AP020A00F_RANGE_P_x16 0x04 |
| #define GP2AP020A00F_RANGE_P_x32 0x05 |
| #define GP2AP020A00F_RANGE_P_x64 0x06 |
| #define GP2AP020A00F_RANGE_P_x128 0x07 |
| |
| /* LED reg bits */ |
| #define GP2AP020A00F_INTVAL_MASK 0xc0 /* Intermittent operating */ |
| #define GP2AP020A00F_INTVAL_0 0x00 |
| #define GP2AP020A00F_INTVAL_4 0x40 |
| #define GP2AP020A00F_INTVAL_8 0x80 |
| #define GP2AP020A00F_INTVAL_16 0xc0 |
| #define GP2AP020A00F_IS_MASK 0x30 /* ILED drive peak current */ |
| #define GP2AP020A00F_IS_13_8mA 0x00 |
| #define GP2AP020A00F_IS_27_5mA 0x10 |
| #define GP2AP020A00F_IS_55mA 0x20 |
| #define GP2AP020A00F_IS_110mA 0x30 |
| #define GP2AP020A00F_PIN_MASK 0x0c /* INT terminal setting */ |
| #define GP2AP020A00F_PIN_ALS_OR_PS 0x00 |
| #define GP2AP020A00F_PIN_ALS 0x04 |
| #define GP2AP020A00F_PIN_PS 0x08 |
| #define GP2AP020A00F_PIN_PS_DETECT 0x0c |
| #define GP2AP020A00F_FREQ_MASK 0x02 /* LED modulation frequency */ |
| #define GP2AP020A00F_FREQ_327_5kHz 0x00 |
| #define GP2AP020A00F_FREQ_81_8kHz 0x02 |
| #define GP2AP020A00F_RST 0x01 /* Software reset */ |
| |
| #define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR 0 |
| #define GP2AP020A00F_SCAN_MODE_LIGHT_IR 1 |
| #define GP2AP020A00F_SCAN_MODE_PROXIMITY 2 |
| #define GP2AP020A00F_CHAN_TIMESTAMP 3 |
| |
| #define GP2AP020A00F_DATA_READY_TIMEOUT msecs_to_jiffies(1000) |
| #define GP2AP020A00F_DATA_REG(chan) (GP2AP020A00F_D0_L_REG + \ |
| (chan) * 2) |
| #define GP2AP020A00F_THRESH_REG(th_val_id) (GP2AP020A00F_TL_L_REG + \ |
| (th_val_id) * 2) |
| #define GP2AP020A00F_THRESH_VAL_ID(reg_addr) ((reg_addr - 4) / 2) |
| |
| #define GP2AP020A00F_SUBTRACT_MODE 0 |
| #define GP2AP020A00F_ADD_MODE 1 |
| |
| #define GP2AP020A00F_MAX_CHANNELS 3 |
| |
| enum gp2ap020a00f_opmode { |
| GP2AP020A00F_OPMODE_READ_RAW_CLEAR, |
| GP2AP020A00F_OPMODE_READ_RAW_IR, |
| GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_OPMODE_PS, |
| GP2AP020A00F_OPMODE_ALS_AND_PS, |
| GP2AP020A00F_OPMODE_PROX_DETECT, |
| GP2AP020A00F_OPMODE_SHUTDOWN, |
| GP2AP020A00F_NUM_OPMODES, |
| }; |
| |
| enum gp2ap020a00f_cmd { |
| GP2AP020A00F_CMD_READ_RAW_CLEAR, |
| GP2AP020A00F_CMD_READ_RAW_IR, |
| GP2AP020A00F_CMD_READ_RAW_PROXIMITY, |
| GP2AP020A00F_CMD_TRIGGER_CLEAR_EN, |
| GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS, |
| GP2AP020A00F_CMD_TRIGGER_IR_EN, |
| GP2AP020A00F_CMD_TRIGGER_IR_DIS, |
| GP2AP020A00F_CMD_TRIGGER_PROX_EN, |
| GP2AP020A00F_CMD_TRIGGER_PROX_DIS, |
| GP2AP020A00F_CMD_ALS_HIGH_EV_EN, |
| GP2AP020A00F_CMD_ALS_HIGH_EV_DIS, |
| GP2AP020A00F_CMD_ALS_LOW_EV_EN, |
| GP2AP020A00F_CMD_ALS_LOW_EV_DIS, |
| GP2AP020A00F_CMD_PROX_HIGH_EV_EN, |
| GP2AP020A00F_CMD_PROX_HIGH_EV_DIS, |
| GP2AP020A00F_CMD_PROX_LOW_EV_EN, |
| GP2AP020A00F_CMD_PROX_LOW_EV_DIS, |
| }; |
| |
| enum gp2ap020a00f_flags { |
| GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, |
| GP2AP020A00F_FLAG_ALS_IR_TRIGGER, |
| GP2AP020A00F_FLAG_PROX_TRIGGER, |
| GP2AP020A00F_FLAG_PROX_RISING_EV, |
| GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| GP2AP020A00F_FLAG_ALS_RISING_EV, |
| GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| GP2AP020A00F_FLAG_LUX_MODE_HI, |
| GP2AP020A00F_FLAG_DATA_READY, |
| }; |
| |
| enum gp2ap020a00f_thresh_val_id { |
| GP2AP020A00F_THRESH_TL, |
| GP2AP020A00F_THRESH_TH, |
| GP2AP020A00F_THRESH_PL, |
| GP2AP020A00F_THRESH_PH, |
| }; |
| |
| struct gp2ap020a00f_data { |
| const struct gp2ap020a00f_platform_data *pdata; |
| struct i2c_client *client; |
| struct mutex lock; |
| char *buffer; |
| struct regulator *vled_reg; |
| unsigned long flags; |
| enum gp2ap020a00f_opmode cur_opmode; |
| struct iio_trigger *trig; |
| struct regmap *regmap; |
| unsigned int thresh_val[4]; |
| u8 debug_reg_addr; |
| struct irq_work work; |
| wait_queue_head_t data_ready_queue; |
| }; |
| |
| static const u8 gp2ap020a00f_reg_init_tab[] = { |
| [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN, |
| [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms | |
| GP2AP020A00F_RANGE_A_x8, |
| [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON | |
| GP2AP020A00F_RES_P_1_56ms_x2 | |
| GP2AP020A00F_RANGE_P_x4, |
| [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 | |
| GP2AP020A00F_IS_110mA | |
| GP2AP020A00F_FREQ_327_5kHz, |
| [GP2AP020A00F_TL_L_REG] = 0, |
| [GP2AP020A00F_TL_H_REG] = 0, |
| [GP2AP020A00F_TH_L_REG] = 0, |
| [GP2AP020A00F_TH_H_REG] = 0, |
| [GP2AP020A00F_PL_L_REG] = 0, |
| [GP2AP020A00F_PL_H_REG] = 0, |
| [GP2AP020A00F_PH_L_REG] = 0, |
| [GP2AP020A00F_PH_H_REG] = 0, |
| }; |
| |
| static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case GP2AP020A00F_OP_REG: |
| case GP2AP020A00F_D0_L_REG: |
| case GP2AP020A00F_D0_H_REG: |
| case GP2AP020A00F_D1_L_REG: |
| case GP2AP020A00F_D1_H_REG: |
| case GP2AP020A00F_D2_L_REG: |
| case GP2AP020A00F_D2_H_REG: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static const struct regmap_config gp2ap020a00f_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| |
| .max_register = GP2AP020A00F_D2_H_REG, |
| .cache_type = REGCACHE_RBTREE, |
| |
| .volatile_reg = gp2ap020a00f_is_volatile_reg, |
| }; |
| |
| static const struct gp2ap020a00f_mutable_config_regs { |
| u8 op_reg; |
| u8 als_reg; |
| u8 ps_reg; |
| u8 led_reg; |
| } opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = { |
| [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = { |
| GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_AUTO_CALC, |
| GP2AP020A00F_PRST_ONCE, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_ALS |
| }, |
| [GP2AP020A00F_OPMODE_READ_RAW_IR] = { |
| GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_MANUAL_CALC, |
| GP2AP020A00F_PRST_ONCE, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_ALS |
| }, |
| [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = { |
| GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_MANUAL_CALC, |
| GP2AP020A00F_PRST_ONCE, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_PS |
| }, |
| [GP2AP020A00F_OPMODE_PROX_DETECT] = { |
| GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_MANUAL_CALC, |
| GP2AP020A00F_PRST_4_CYCLES, |
| GP2AP020A00F_INTTYPE_PULSE, |
| GP2AP020A00F_PIN_PS_DETECT |
| }, |
| [GP2AP020A00F_OPMODE_ALS] = { |
| GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_AUTO_CALC, |
| GP2AP020A00F_PRST_ONCE, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_ALS |
| }, |
| [GP2AP020A00F_OPMODE_PS] = { |
| GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_MANUAL_CALC, |
| GP2AP020A00F_PRST_4_CYCLES, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_PS |
| }, |
| [GP2AP020A00F_OPMODE_ALS_AND_PS] = { |
| GP2AP020A00F_OP_ALS_AND_PS |
| | GP2AP020A00F_OP2_CONT_OPERATION |
| | GP2AP020A00F_OP3_OPERATION |
| | GP2AP020A00F_TYPE_AUTO_CALC, |
| GP2AP020A00F_PRST_4_CYCLES, |
| GP2AP020A00F_INTTYPE_LEVEL, |
| GP2AP020A00F_PIN_ALS_OR_PS |
| }, |
| [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, }, |
| }; |
| |
| static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data, |
| enum gp2ap020a00f_opmode op) |
| { |
| unsigned int op_reg_val; |
| int err; |
| |
| if (op != GP2AP020A00F_OPMODE_SHUTDOWN) { |
| err = regmap_read(data->regmap, GP2AP020A00F_OP_REG, |
| &op_reg_val); |
| if (err < 0) |
| return err; |
| /* |
| * Shutdown the device if the operation being executed entails |
| * mode transition. |
| */ |
| if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) != |
| (op_reg_val & GP2AP020A00F_OP_MASK)) { |
| /* set shutdown mode */ |
| err = regmap_update_bits(data->regmap, |
| GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK, |
| GP2AP020A00F_OP3_SHUTDOWN); |
| if (err < 0) |
| return err; |
| } |
| |
| err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG, |
| GP2AP020A00F_PRST_MASK, opmode_regs_settings[op] |
| .als_reg); |
| if (err < 0) |
| return err; |
| |
| err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG, |
| GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op] |
| .ps_reg); |
| if (err < 0) |
| return err; |
| |
| err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG, |
| GP2AP020A00F_PIN_MASK, opmode_regs_settings[op] |
| .led_reg); |
| if (err < 0) |
| return err; |
| } |
| |
| /* Set OP_REG and apply operation mode (power on / off) */ |
| err = regmap_update_bits(data->regmap, |
| GP2AP020A00F_OP_REG, |
| GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK | |
| GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK, |
| opmode_regs_settings[op].op_reg); |
| if (err < 0) |
| return err; |
| |
| data->cur_opmode = op; |
| |
| return 0; |
| } |
| |
| static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data) |
| { |
| return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) || |
| test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) || |
| test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) || |
| test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| } |
| |
| static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data) |
| { |
| return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) || |
| test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| } |
| |
| static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data, |
| enum gp2ap020a00f_thresh_val_id th_val_id, |
| bool enable) |
| { |
| __le16 thresh_buf = 0; |
| unsigned int thresh_reg_val; |
| |
| if (!enable) |
| thresh_reg_val = 0; |
| else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) && |
| th_val_id != GP2AP020A00F_THRESH_PL && |
| th_val_id != GP2AP020A00F_THRESH_PH) |
| /* |
| * For the high lux mode ALS threshold has to be scaled down |
| * to allow for proper comparison with the output value. |
| */ |
| thresh_reg_val = data->thresh_val[th_val_id] / 16; |
| else |
| thresh_reg_val = data->thresh_val[th_val_id] > 16000 ? |
| 16000 : |
| data->thresh_val[th_val_id]; |
| |
| thresh_buf = cpu_to_le16(thresh_reg_val); |
| |
| return regmap_bulk_write(data->regmap, |
| GP2AP020A00F_THRESH_REG(th_val_id), |
| (u8 *)&thresh_buf, 2); |
| } |
| |
| static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data, |
| enum gp2ap020a00f_opmode diff_mode, int add_sub) |
| { |
| enum gp2ap020a00f_opmode new_mode; |
| |
| if (diff_mode != GP2AP020A00F_OPMODE_ALS && |
| diff_mode != GP2AP020A00F_OPMODE_PS) |
| return -EINVAL; |
| |
| if (add_sub == GP2AP020A00F_ADD_MODE) { |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN) |
| new_mode = diff_mode; |
| else |
| new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS; |
| } else { |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS) |
| new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ? |
| GP2AP020A00F_OPMODE_PS : |
| GP2AP020A00F_OPMODE_ALS; |
| else |
| new_mode = GP2AP020A00F_OPMODE_SHUTDOWN; |
| } |
| |
| return gp2ap020a00f_set_operation_mode(data, new_mode); |
| } |
| |
| static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data, |
| enum gp2ap020a00f_cmd cmd) |
| { |
| int err = 0; |
| |
| switch (cmd) { |
| case GP2AP020A00F_CMD_READ_RAW_CLEAR: |
| if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| return -EBUSY; |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_READ_RAW_CLEAR); |
| break; |
| case GP2AP020A00F_CMD_READ_RAW_IR: |
| if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| return -EBUSY; |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_READ_RAW_IR); |
| break; |
| case GP2AP020A00F_CMD_READ_RAW_PROXIMITY: |
| if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| return -EBUSY; |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN: |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| return -EBUSY; |
| if (!gp2ap020a00f_als_enabled(data)) |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_ADD_MODE); |
| set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS: |
| clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); |
| if (gp2ap020a00f_als_enabled(data)) |
| break; |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_SUBTRACT_MODE); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_IR_EN: |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| return -EBUSY; |
| if (!gp2ap020a00f_als_enabled(data)) |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_ADD_MODE); |
| set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_IR_DIS: |
| clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); |
| if (gp2ap020a00f_als_enabled(data)) |
| break; |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_SUBTRACT_MODE); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_PROX_EN: |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| return -EBUSY; |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_PS, |
| GP2AP020A00F_ADD_MODE); |
| set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); |
| break; |
| case GP2AP020A00F_CMD_TRIGGER_PROX_DIS: |
| clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_PS, |
| GP2AP020A00F_SUBTRACT_MODE); |
| break; |
| case GP2AP020A00F_CMD_ALS_HIGH_EV_EN: |
| if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) |
| return 0; |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| return -EBUSY; |
| if (!gp2ap020a00f_als_enabled(data)) { |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_ADD_MODE); |
| if (err < 0) |
| return err; |
| } |
| set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TH, true); |
| break; |
| case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS: |
| if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) |
| return 0; |
| clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); |
| if (!gp2ap020a00f_als_enabled(data)) { |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_SUBTRACT_MODE); |
| if (err < 0) |
| return err; |
| } |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TH, false); |
| break; |
| case GP2AP020A00F_CMD_ALS_LOW_EV_EN: |
| if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) |
| return 0; |
| if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| return -EBUSY; |
| if (!gp2ap020a00f_als_enabled(data)) { |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_ADD_MODE); |
| if (err < 0) |
| return err; |
| } |
| set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TL, true); |
| break; |
| case GP2AP020A00F_CMD_ALS_LOW_EV_DIS: |
| if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) |
| return 0; |
| clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| if (!gp2ap020a00f_als_enabled(data)) { |
| err = gp2ap020a00f_alter_opmode(data, |
| GP2AP020A00F_OPMODE_ALS, |
| GP2AP020A00F_SUBTRACT_MODE); |
| if (err < 0) |
| return err; |
| } |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TL, false); |
| break; |
| case GP2AP020A00F_CMD_PROX_HIGH_EV_EN: |
| if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) |
| return 0; |
| if (gp2ap020a00f_als_enabled(data) || |
| data->cur_opmode == GP2AP020A00F_OPMODE_PS) |
| return -EBUSY; |
| if (!gp2ap020a00f_prox_detect_enabled(data)) { |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_PROX_DETECT); |
| if (err < 0) |
| return err; |
| } |
| set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_PH, true); |
| break; |
| case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS: |
| if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) |
| return 0; |
| clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_SHUTDOWN); |
| if (err < 0) |
| return err; |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_PH, false); |
| break; |
| case GP2AP020A00F_CMD_PROX_LOW_EV_EN: |
| if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) |
| return 0; |
| if (gp2ap020a00f_als_enabled(data) || |
| data->cur_opmode == GP2AP020A00F_OPMODE_PS) |
| return -EBUSY; |
| if (!gp2ap020a00f_prox_detect_enabled(data)) { |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_PROX_DETECT); |
| if (err < 0) |
| return err; |
| } |
| set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_PL, true); |
| break; |
| case GP2AP020A00F_CMD_PROX_LOW_EV_DIS: |
| if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) |
| return 0; |
| clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_SHUTDOWN); |
| if (err < 0) |
| return err; |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_PL, false); |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data) |
| { |
| int ret; |
| |
| ret = wait_event_timeout(data->data_ready_queue, |
| test_bit(GP2AP020A00F_FLAG_DATA_READY, |
| &data->flags), |
| GP2AP020A00F_DATA_READY_TIMEOUT); |
| clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags); |
| |
| return ret > 0 ? 0 : -ETIME; |
| } |
| |
| static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data, |
| unsigned int output_reg, int *val) |
| { |
| u8 reg_buf[2]; |
| int err; |
| |
| err = wait_conversion_complete_irq(data); |
| if (err < 0) |
| dev_dbg(&data->client->dev, "data ready timeout\n"); |
| |
| err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2); |
| if (err < 0) |
| return err; |
| |
| *val = le16_to_cpup((__le16 *)reg_buf); |
| |
| return err; |
| } |
| |
| static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data, |
| int output_val) |
| { |
| u8 new_range = 0xff; |
| int err; |
| |
| if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) { |
| if (output_val > 16000) { |
| set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); |
| new_range = GP2AP020A00F_RANGE_A_x128; |
| } |
| } else { |
| if (output_val < 1000) { |
| clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); |
| new_range = GP2AP020A00F_RANGE_A_x8; |
| } |
| } |
| |
| if (new_range != 0xff) { |
| /* Clear als threshold registers to avoid spurious |
| * events caused by lux mode transition. |
| */ |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TH, false); |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Clearing als threshold register failed.\n"); |
| return false; |
| } |
| |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TL, false); |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Clearing als threshold register failed.\n"); |
| return false; |
| } |
| |
| /* Change lux mode */ |
| err = regmap_update_bits(data->regmap, |
| GP2AP020A00F_OP_REG, |
| GP2AP020A00F_OP3_MASK, |
| GP2AP020A00F_OP3_SHUTDOWN); |
| |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Shutting down the device failed.\n"); |
| return false; |
| } |
| |
| err = regmap_update_bits(data->regmap, |
| GP2AP020A00F_ALS_REG, |
| GP2AP020A00F_RANGE_A_MASK, |
| new_range); |
| |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Adjusting device lux mode failed.\n"); |
| return false; |
| } |
| |
| err = regmap_update_bits(data->regmap, |
| GP2AP020A00F_OP_REG, |
| GP2AP020A00F_OP3_MASK, |
| GP2AP020A00F_OP3_OPERATION); |
| |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Powering up the device failed.\n"); |
| return false; |
| } |
| |
| /* Adjust als threshold register values to the new lux mode */ |
| if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) { |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TH, true); |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Adjusting als threshold value failed.\n"); |
| return false; |
| } |
| } |
| |
| if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) { |
| err = gp2ap020a00f_write_event_threshold(data, |
| GP2AP020A00F_THRESH_TL, true); |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "Adjusting als threshold value failed.\n"); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data, |
| int *output_val) |
| { |
| if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) |
| *output_val *= 16; |
| } |
| |
| static void gp2ap020a00f_iio_trigger_work(struct irq_work *work) |
| { |
| struct gp2ap020a00f_data *data = |
| container_of(work, struct gp2ap020a00f_data, work); |
| |
| iio_trigger_poll(data->trig, 0); |
| } |
| |
| static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data) |
| { |
| struct iio_dev *indio_dev = data; |
| struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| unsigned int op_reg_val; |
| int ret; |
| |
| /* Read interrupt flags */ |
| ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val); |
| if (ret < 0) |
| return IRQ_HANDLED; |
| |
| if (gp2ap020a00f_prox_detect_enabled(priv)) { |
| if (op_reg_val & GP2AP020A00F_PROX_DETECT) { |
| iio_push_event(indio_dev, |
| IIO_UNMOD_EVENT_CODE( |
| IIO_PROXIMITY, |
| GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| IIO_EV_TYPE_ROC, |
| IIO_EV_DIR_RISING), |
| iio_get_time_ns()); |
| } else { |
| iio_push_event(indio_dev, |
| IIO_UNMOD_EVENT_CODE( |
| IIO_PROXIMITY, |
| GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| IIO_EV_TYPE_ROC, |
| IIO_EV_DIR_FALLING), |
| iio_get_time_ns()); |
| } |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data) |
| { |
| struct iio_dev *indio_dev = data; |
| struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| u8 op_reg_flags, d0_reg_buf[2]; |
| unsigned int output_val, op_reg_val; |
| int thresh_val_id, ret; |
| |
| /* Read interrupt flags */ |
| ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, |
| &op_reg_val); |
| if (ret < 0) |
| goto done; |
| |
| op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P |
| | GP2AP020A00F_PROX_DETECT); |
| |
| op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P |
| & ~GP2AP020A00F_PROX_DETECT); |
| |
| /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */ |
| if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) { |
| ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG, |
| op_reg_val); |
| if (ret < 0) |
| goto done; |
| } |
| |
| if (op_reg_flags & GP2AP020A00F_FLAG_A) { |
| /* Check D0 register to assess if the lux mode |
| * transition is required. |
| */ |
| ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG, |
| d0_reg_buf, 2); |
| if (ret < 0) |
| goto done; |
| |
| output_val = le16_to_cpup((__le16 *)d0_reg_buf); |
| |
| if (gp2ap020a00f_adjust_lux_mode(priv, output_val)) |
| goto done; |
| |
| gp2ap020a00f_output_to_lux(priv, &output_val); |
| |
| /* |
| * We need to check output value to distinguish |
| * between high and low ambient light threshold event. |
| */ |
| if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) { |
| thresh_val_id = |
| GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG); |
| if (output_val > priv->thresh_val[thresh_val_id]) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE( |
| IIO_LIGHT, |
| GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| IIO_MOD_LIGHT_CLEAR, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_RISING), |
| iio_get_time_ns()); |
| } |
| |
| if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) { |
| thresh_val_id = |
| GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG); |
| if (output_val < priv->thresh_val[thresh_val_id]) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE( |
| IIO_LIGHT, |
| GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| IIO_MOD_LIGHT_CLEAR, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_FALLING), |
| iio_get_time_ns()); |
| } |
| } |
| |
| if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR || |
| priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR || |
| priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) { |
| set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags); |
| wake_up(&priv->data_ready_queue); |
| goto done; |
| } |
| |
| if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) || |
| test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) || |
| test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags)) |
| /* This fires off the trigger. */ |
| irq_work_queue(&priv->work); |
| |
| done: |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data) |
| { |
| struct iio_poll_func *pf = data; |
| struct iio_dev *indio_dev = pf->indio_dev; |
| struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| size_t d_size = 0; |
| __le32 light_lux; |
| int i, out_val, ret; |
| |
| for_each_set_bit(i, indio_dev->active_scan_mask, |
| indio_dev->masklength) { |
| ret = regmap_bulk_read(priv->regmap, |
| GP2AP020A00F_DATA_REG(i), |
| &priv->buffer[d_size], 2); |
| if (ret < 0) |
| goto done; |
| |
| if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR || |
| i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) { |
| out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]); |
| gp2ap020a00f_output_to_lux(priv, &out_val); |
| light_lux = cpu_to_le32(out_val); |
| memcpy(&priv->buffer[d_size], (u8 *)&light_lux, 4); |
| d_size += 4; |
| } else { |
| d_size += 2; |
| } |
| } |
| |
| iio_push_to_buffers_with_timestamp(indio_dev, priv->buffer, |
| pf->timestamp); |
| done: |
| iio_trigger_notify_done(indio_dev->trig); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan, |
| enum iio_event_direction event_dir) |
| { |
| switch (chan->type) { |
| case IIO_PROXIMITY: |
| if (event_dir == IIO_EV_DIR_RISING) |
| return GP2AP020A00F_PH_L_REG; |
| else |
| return GP2AP020A00F_PL_L_REG; |
| case IIO_LIGHT: |
| if (event_dir == IIO_EV_DIR_RISING) |
| return GP2AP020A00F_TH_L_REG; |
| else |
| return GP2AP020A00F_TL_L_REG; |
| default: |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| enum iio_event_info info, |
| int val, int val2) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| bool event_en = false; |
| u8 thresh_val_id; |
| u8 thresh_reg_l; |
| int err = 0; |
| |
| mutex_lock(&data->lock); |
| |
| thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir); |
| thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l); |
| |
| if (thresh_val_id > GP2AP020A00F_THRESH_PH) { |
| err = -EINVAL; |
| goto error_unlock; |
| } |
| |
| switch (thresh_reg_l) { |
| case GP2AP020A00F_TH_L_REG: |
| event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, |
| &data->flags); |
| break; |
| case GP2AP020A00F_TL_L_REG: |
| event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| &data->flags); |
| break; |
| case GP2AP020A00F_PH_L_REG: |
| if (val == 0) { |
| err = -EINVAL; |
| goto error_unlock; |
| } |
| event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, |
| &data->flags); |
| break; |
| case GP2AP020A00F_PL_L_REG: |
| if (val == 0) { |
| err = -EINVAL; |
| goto error_unlock; |
| } |
| event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| &data->flags); |
| break; |
| } |
| |
| data->thresh_val[thresh_val_id] = val; |
| err = gp2ap020a00f_write_event_threshold(data, thresh_val_id, |
| event_en); |
| error_unlock: |
| mutex_unlock(&data->lock); |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| enum iio_event_info info, |
| int *val, int *val2) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| u8 thresh_reg_l; |
| int err = IIO_VAL_INT; |
| |
| mutex_lock(&data->lock); |
| |
| thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir); |
| |
| if (thresh_reg_l > GP2AP020A00F_PH_L_REG) { |
| err = -EINVAL; |
| goto error_unlock; |
| } |
| |
| *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)]; |
| |
| error_unlock: |
| mutex_unlock(&data->lock); |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev, |
| int state) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev; |
| int err; |
| |
| cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN : |
| GP2AP020A00F_CMD_PROX_HIGH_EV_DIS; |
| cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN : |
| GP2AP020A00F_CMD_PROX_LOW_EV_DIS; |
| |
| /* |
| * In order to enable proximity detection feature in the device |
| * both high and low threshold registers have to be written |
| * with different values, greater than zero. |
| */ |
| if (state) { |
| if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0) |
| return -EINVAL; |
| |
| if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0) |
| return -EINVAL; |
| } |
| |
| err = gp2ap020a00f_exec_cmd(data, cmd_high_ev); |
| if (err < 0) |
| return err; |
| |
| err = gp2ap020a00f_exec_cmd(data, cmd_low_ev); |
| if (err < 0) |
| return err; |
| |
| free_irq(data->client->irq, indio_dev); |
| |
| if (state) |
| err = request_threaded_irq(data->client->irq, NULL, |
| &gp2ap020a00f_prox_sensing_handler, |
| IRQF_TRIGGER_RISING | |
| IRQF_TRIGGER_FALLING | |
| IRQF_ONESHOT, |
| "gp2ap020a00f_prox_sensing", |
| indio_dev); |
| else { |
| err = request_threaded_irq(data->client->irq, NULL, |
| &gp2ap020a00f_thresh_event_handler, |
| IRQF_TRIGGER_FALLING | |
| IRQF_ONESHOT, |
| "gp2ap020a00f_thresh_event", |
| indio_dev); |
| } |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| int state) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| enum gp2ap020a00f_cmd cmd; |
| int err; |
| |
| mutex_lock(&data->lock); |
| |
| switch (chan->type) { |
| case IIO_PROXIMITY: |
| err = gp2ap020a00f_write_prox_event_config(indio_dev, state); |
| break; |
| case IIO_LIGHT: |
| if (dir == IIO_EV_DIR_RISING) { |
| cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN : |
| GP2AP020A00F_CMD_ALS_HIGH_EV_DIS; |
| err = gp2ap020a00f_exec_cmd(data, cmd); |
| } else { |
| cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN : |
| GP2AP020A00F_CMD_ALS_LOW_EV_DIS; |
| err = gp2ap020a00f_exec_cmd(data, cmd); |
| } |
| break; |
| default: |
| err = -EINVAL; |
| } |
| |
| mutex_unlock(&data->lock); |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| int event_en = 0; |
| |
| mutex_lock(&data->lock); |
| |
| switch (chan->type) { |
| case IIO_PROXIMITY: |
| if (dir == IIO_EV_DIR_RISING) |
| event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, |
| &data->flags); |
| else |
| event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| &data->flags); |
| break; |
| case IIO_LIGHT: |
| if (dir == IIO_EV_DIR_RISING) |
| event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, |
| &data->flags); |
| else |
| event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| &data->flags); |
| break; |
| default: |
| event_en = -EINVAL; |
| break; |
| } |
| |
| mutex_unlock(&data->lock); |
| |
| return event_en; |
| } |
| |
| static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data, |
| struct iio_chan_spec const *chan, int *val) |
| { |
| enum gp2ap020a00f_cmd cmd; |
| int err; |
| |
| switch (chan->scan_index) { |
| case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR; |
| break; |
| case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| cmd = GP2AP020A00F_CMD_READ_RAW_IR; |
| break; |
| case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| err = gp2ap020a00f_exec_cmd(data, cmd); |
| if (err < 0) { |
| dev_err(&data->client->dev, |
| "gp2ap020a00f_exec_cmd failed\n"); |
| goto error_ret; |
| } |
| |
| err = gp2ap020a00f_read_output(data, chan->address, val); |
| if (err < 0) |
| dev_err(&data->client->dev, |
| "gp2ap020a00f_read_output failed\n"); |
| |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_SHUTDOWN); |
| if (err < 0) |
| dev_err(&data->client->dev, |
| "Failed to shut down the device.\n"); |
| |
| if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR || |
| cmd == GP2AP020A00F_CMD_READ_RAW_IR) |
| gp2ap020a00f_output_to_lux(data, val); |
| |
| error_ret: |
| return err; |
| } |
| |
| static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int *val, int *val2, |
| long mask) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| int err = -EINVAL; |
| |
| mutex_lock(&data->lock); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_RAW: |
| if (iio_buffer_enabled(indio_dev)) { |
| err = -EBUSY; |
| goto error_unlock; |
| } |
| |
| err = gp2ap020a00f_read_channel(data, chan, val); |
| break; |
| } |
| |
| error_unlock: |
| mutex_unlock(&data->lock); |
| |
| return err < 0 ? err : IIO_VAL_INT; |
| } |
| |
| static const struct iio_event_spec gp2ap020a00f_event_spec_light[] = { |
| { |
| .type = IIO_EV_TYPE_THRESH, |
| .dir = IIO_EV_DIR_RISING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, { |
| .type = IIO_EV_TYPE_THRESH, |
| .dir = IIO_EV_DIR_FALLING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, |
| }; |
| |
| static const struct iio_event_spec gp2ap020a00f_event_spec_prox[] = { |
| { |
| .type = IIO_EV_TYPE_ROC, |
| .dir = IIO_EV_DIR_RISING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, { |
| .type = IIO_EV_TYPE_ROC, |
| .dir = IIO_EV_DIR_FALLING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, |
| }; |
| |
| static const struct iio_chan_spec gp2ap020a00f_channels[] = { |
| { |
| .type = IIO_LIGHT, |
| .channel2 = IIO_MOD_LIGHT_CLEAR, |
| .modified = 1, |
| .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 24, |
| .shift = 0, |
| .storagebits = 32, |
| .endianness = IIO_LE, |
| }, |
| .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| .address = GP2AP020A00F_D0_L_REG, |
| .event_spec = gp2ap020a00f_event_spec_light, |
| .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_light), |
| }, |
| { |
| .type = IIO_LIGHT, |
| .channel2 = IIO_MOD_LIGHT_IR, |
| .modified = 1, |
| .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 24, |
| .shift = 0, |
| .storagebits = 32, |
| .endianness = IIO_LE, |
| }, |
| .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR, |
| .address = GP2AP020A00F_D1_L_REG, |
| }, |
| { |
| .type = IIO_PROXIMITY, |
| .modified = 0, |
| .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 16, |
| .shift = 0, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| .address = GP2AP020A00F_D2_L_REG, |
| .event_spec = gp2ap020a00f_event_spec_prox, |
| .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_prox), |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP), |
| }; |
| |
| static const struct iio_info gp2ap020a00f_info = { |
| .read_raw = &gp2ap020a00f_read_raw, |
| .read_event_value = &gp2ap020a00f_read_event_val, |
| .read_event_config = &gp2ap020a00f_read_event_config, |
| .write_event_value = &gp2ap020a00f_write_event_val, |
| .write_event_config = &gp2ap020a00f_write_event_config, |
| .driver_module = THIS_MODULE, |
| }; |
| |
| static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| int i, err = 0; |
| |
| mutex_lock(&data->lock); |
| |
| /* |
| * Enable triggers according to the scan_mask. Enabling either |
| * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS |
| * module in the device, which generates samples in both D0 (clear) |
| * and D1 (ir) registers. As the two registers are bound to the |
| * two separate IIO channels they are treated in the driver logic |
| * as if they were controlled independently. |
| */ |
| for_each_set_bit(i, indio_dev->active_scan_mask, |
| indio_dev->masklength) { |
| switch (i) { |
| case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_CLEAR_EN); |
| break; |
| case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_IR_EN); |
| break; |
| case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_PROX_EN); |
| break; |
| } |
| } |
| |
| if (err < 0) |
| goto error_unlock; |
| |
| data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); |
| if (!data->buffer) { |
| err = -ENOMEM; |
| goto error_unlock; |
| } |
| |
| err = iio_triggered_buffer_postenable(indio_dev); |
| |
| error_unlock: |
| mutex_unlock(&data->lock); |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev) |
| { |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| int i, err; |
| |
| mutex_lock(&data->lock); |
| |
| err = iio_triggered_buffer_predisable(indio_dev); |
| if (err < 0) |
| goto error_unlock; |
| |
| for_each_set_bit(i, indio_dev->active_scan_mask, |
| indio_dev->masklength) { |
| switch (i) { |
| case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS); |
| break; |
| case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_IR_DIS); |
| break; |
| case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| err = gp2ap020a00f_exec_cmd(data, |
| GP2AP020A00F_CMD_TRIGGER_PROX_DIS); |
| break; |
| } |
| } |
| |
| if (err == 0) |
| kfree(data->buffer); |
| |
| error_unlock: |
| mutex_unlock(&data->lock); |
| |
| return err; |
| } |
| |
| static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = { |
| .postenable = &gp2ap020a00f_buffer_postenable, |
| .predisable = &gp2ap020a00f_buffer_predisable, |
| }; |
| |
| static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = { |
| .owner = THIS_MODULE, |
| }; |
| |
| static int gp2ap020a00f_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct gp2ap020a00f_data *data; |
| struct iio_dev *indio_dev; |
| struct regmap *regmap; |
| int err; |
| |
| indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| if (!indio_dev) |
| return -ENOMEM; |
| |
| data = iio_priv(indio_dev); |
| |
| data->vled_reg = devm_regulator_get(&client->dev, "vled"); |
| if (IS_ERR(data->vled_reg)) |
| return PTR_ERR(data->vled_reg); |
| |
| err = regulator_enable(data->vled_reg); |
| if (err) |
| return err; |
| |
| regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config); |
| if (IS_ERR(regmap)) { |
| dev_err(&client->dev, "Regmap initialization failed.\n"); |
| err = PTR_ERR(regmap); |
| goto error_regulator_disable; |
| } |
| |
| /* Initialize device registers */ |
| err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG, |
| gp2ap020a00f_reg_init_tab, |
| ARRAY_SIZE(gp2ap020a00f_reg_init_tab)); |
| |
| if (err < 0) { |
| dev_err(&client->dev, "Device initialization failed.\n"); |
| goto error_regulator_disable; |
| } |
| |
| i2c_set_clientdata(client, indio_dev); |
| |
| data->client = client; |
| data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN; |
| data->regmap = regmap; |
| init_waitqueue_head(&data->data_ready_queue); |
| |
| mutex_init(&data->lock); |
| indio_dev->dev.parent = &client->dev; |
| indio_dev->channels = gp2ap020a00f_channels; |
| indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels); |
| indio_dev->info = &gp2ap020a00f_info; |
| indio_dev->name = id->name; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| |
| /* Allocate buffer */ |
| err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, |
| &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops); |
| if (err < 0) |
| goto error_regulator_disable; |
| |
| /* Allocate trigger */ |
| data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger", |
| indio_dev->name); |
| if (data->trig == NULL) { |
| err = -ENOMEM; |
| dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n"); |
| goto error_uninit_buffer; |
| } |
| |
| /* This needs to be requested here for read_raw calls to work. */ |
| err = request_threaded_irq(client->irq, NULL, |
| &gp2ap020a00f_thresh_event_handler, |
| IRQF_TRIGGER_FALLING | |
| IRQF_ONESHOT, |
| "gp2ap020a00f_als_event", |
| indio_dev); |
| if (err < 0) { |
| dev_err(&client->dev, "Irq request failed.\n"); |
| goto error_uninit_buffer; |
| } |
| |
| data->trig->ops = &gp2ap020a00f_trigger_ops; |
| data->trig->dev.parent = &data->client->dev; |
| |
| init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work); |
| |
| err = iio_trigger_register(data->trig); |
| if (err < 0) { |
| dev_err(&client->dev, "Failed to register iio trigger.\n"); |
| goto error_free_irq; |
| } |
| |
| err = iio_device_register(indio_dev); |
| if (err < 0) |
| goto error_trigger_unregister; |
| |
| return 0; |
| |
| error_trigger_unregister: |
| iio_trigger_unregister(data->trig); |
| error_free_irq: |
| free_irq(client->irq, indio_dev); |
| error_uninit_buffer: |
| iio_triggered_buffer_cleanup(indio_dev); |
| error_regulator_disable: |
| regulator_disable(data->vled_reg); |
| |
| return err; |
| } |
| |
| static int gp2ap020a00f_remove(struct i2c_client *client) |
| { |
| struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| int err; |
| |
| err = gp2ap020a00f_set_operation_mode(data, |
| GP2AP020A00F_OPMODE_SHUTDOWN); |
| if (err < 0) |
| dev_err(&indio_dev->dev, "Failed to power off the device.\n"); |
| |
| iio_device_unregister(indio_dev); |
| iio_trigger_unregister(data->trig); |
| free_irq(client->irq, indio_dev); |
| iio_triggered_buffer_cleanup(indio_dev); |
| regulator_disable(data->vled_reg); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id gp2ap020a00f_id[] = { |
| { GP2A_I2C_NAME, 0 }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id); |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id gp2ap020a00f_of_match[] = { |
| { .compatible = "sharp,gp2ap020a00f" }, |
| { } |
| }; |
| #endif |
| |
| static struct i2c_driver gp2ap020a00f_driver = { |
| .driver = { |
| .name = GP2A_I2C_NAME, |
| .of_match_table = of_match_ptr(gp2ap020a00f_of_match), |
| .owner = THIS_MODULE, |
| }, |
| .probe = gp2ap020a00f_probe, |
| .remove = gp2ap020a00f_remove, |
| .id_table = gp2ap020a00f_id, |
| }; |
| |
| module_i2c_driver(gp2ap020a00f_driver); |
| |
| MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>"); |
| MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver"); |
| MODULE_LICENSE("GPL v2"); |
