diff options
Diffstat (limited to 'drivers/iio/light/gp2ap020a00f.c')
| -rw-r--r-- | drivers/iio/light/gp2ap020a00f.c | 1654 |
1 files changed, 1654 insertions, 0 deletions
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c new file mode 100644 index 000000000..32b644983 --- /dev/null +++ b/drivers/iio/light/gp2ap020a00f.c @@ -0,0 +1,1654 @@ +/* + * 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 <asm/unaligned.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); +} + +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; + 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); + + put_unaligned_le32(out_val, &priv->buffer[d_size]); + 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"); |