diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 new file mode 100755 index 0000000000000000000000000000000000000000..470f7ad9c0730b26d44f3bcca559408c0bc8c38c --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 @@ -0,0 +1,6 @@ +What: /sys/bus/iio/devices/device[n]/in_illuminance0_calibrate +KernelVersion: 2.6.37 +Contact: linux-iio@vger.kernel.org +Description: + This property causes an internal calibration of the als gain trim + value which is later used in calculating illuminance in lux. diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x new file mode 100755 index 0000000000000000000000000000000000000000..b2798b258bf7bbc42753c65b74160fa5ea89d973 --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x @@ -0,0 +1,13 @@ +What: /sys/bus/iio/devices/device[n]/in_illuminance0_calibrate +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Causes an internal calibration of the als gain trim + value which is later used in calculating illuminance in lux. + +What: /sys/bus/iio/devices/device[n]/in_proximity0_calibrate +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Causes a recalculation and adjustment to the + proximity_thresh_rising_value. diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio index ca12784aa172857059ca6929051f575cb41f8930..eec9acbd964801404d412b7b1c12198e3ab6d426 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio @@ -243,6 +243,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias +What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias +What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -258,6 +260,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale +what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale +what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -457,6 +461,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_rising_value What: /sys/.../events/in_voltageY_raw_thresh_falling_value What: /sys/.../events/in_tempY_raw_thresh_rising_value What: /sys/.../events/in_tempY_raw_thresh_falling_value +What: /sys/.../events/in_illuminance0_thresh_falling_value +what: /sys/.../events/in_illuminance0_thresh_rising_value +what: /sys/.../events/in_proximity0_thresh_falling_value +what: /sys/.../events/in_proximity0_thresh_rising_value KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -556,6 +564,8 @@ What: /sys/.../events/in_tempY_thresh_falling_period What: /sys/.../events/in_tempY_roc_rising_period What: /sys/.../events/in_tempY_roc_falling_period What: /sys/.../events/in_accel_x&y&z_mag_falling_period +What: /sys/.../events/in_intensity0_thresh_period +What: /sys/.../events/in_proximity0_thresh_period KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light index edbf470e4e30571555974598bae98e03b3515357..715c74dcb53a0a9d9db86ce95decea9d09747282 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light @@ -26,7 +26,7 @@ Description: Hardware dependent list of possible values supported for the adc_resolution of the given sensor. -What: /sys/bus/iio/devices/device[n]/illuminance0[_input|_raw] +What: /sys/bus/iio/devices/device[n]/in_illuminance0[_input|_raw] KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -45,7 +45,7 @@ Description: do this calculation manually by reading the infrared sensor value and doing the negation in sw. -What: /sys/bus/iio/devices/device[n]/proximity[_input|_raw] +What: /sys/bus/iio/devices/device[n]/in_proximity[_input|_raw] KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -63,23 +63,22 @@ Description: and if expressed in SI units, should include _input. If this value is not in SI units, then it should include _raw. -What: /sys/bus/iio/devices/device[n]/illuminance0_target +What: /sys/bus/iio/devices/device[n]/in_illuminance0_target KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: This property gets/sets the last known external lux measurement used in/for calibration. -What: /sys/bus/iio/devices/device[n]/illuminance0_integration_time +What: /sys/bus/iio/devices/device[n]/in_illuminance0_integration_time KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: This property gets/sets the sensors ADC analog integration time. -What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale +What: /sys/bus/iio/devices/device[n]/in_illuminance0_lux_table KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: - Hardware or software applied calibration scale factor assumed - to account for attenuation due to industrial design (glass - filters or aperture holes). + This property gets/sets the table of coefficients + used in calculating illuminance in lux. diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig index fd39f72a3289cb887caf5a0001365d74cdb6fc3c..4bed30eac3ed1e822c64679e44fda340b2878620 100644 --- a/drivers/staging/iio/light/Kconfig +++ b/drivers/staging/iio/light/Kconfig @@ -42,4 +42,12 @@ config TSL2583 Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices. Access ALS data via iio, sysfs. +config TSL2x7x + tristate "TAOS TSL/TMD2x71 and TSL/TMD2x72 Family of light and proximity sensors" + depends on I2C + help + Support for: tsl2571, tsl2671, tmd2671, tsl2771, tmd2771, tsl2572, tsl2672, + tmd2672, tsl2772, tmd2772 devices. + Provides iio_events and direct access via sysfs. + endmenu diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile index 535d3139ccbed85f85f5f94d80825202fa29a94e..141af1eb164c7b9249d928df57464b1f010ce7ca 100644 --- a/drivers/staging/iio/light/Makefile +++ b/drivers/staging/iio/light/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o obj-$(CONFIG_TSL2583) += tsl2583.o +obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o diff --git a/drivers/staging/iio/light/tsl2x7x.h b/drivers/staging/iio/light/tsl2x7x.h new file mode 100755 index 0000000000000000000000000000000000000000..c4acf5ff17944e618a73d7b40449676dca7cb26e --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x.h @@ -0,0 +1,100 @@ +/* + * Device driver for monitoring ambient light intensity (lux) + * and proximity (prox) within the TAOS TSL2X7X family of devices. + * + * Copyright (c) 2012, TAOS Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __TSL2X7X_H +#define __TSL2X7X_H +#include + +/* Max number of segments allowable in LUX table */ +#define TSL2X7X_MAX_LUX_TABLE_SIZE 9 +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE) + +struct iio_dev; + +struct tsl2x7x_lux { + unsigned int ratio; + unsigned int ch0; + unsigned int ch1; +}; + +/** + * struct tsl2x7x_default_settings - power on defaults unless + * overridden by platform data. + * @als_time: ALS Integration time - multiple of 50mS + * @als_gain: Index into the ALS gain table. + * @als_gain_trim: default gain trim to account for + * aperture effects. + * @wait_time: Time between PRX and ALS cycles + * in 2.7 periods + * @prx_time: 5.2ms prox integration time - + * decrease in 2.7ms periods + * @prx_gain: Proximity gain index + * @prox_config: Prox configuration filters. + * @als_cal_target: Known external ALS reading for + * calibration. + * @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als, + * 0x20 = prx, 0x30 = bth + * @persistence: H/W Filters, Number of 'out of limits' + * ADC readings PRX/ALS. + * @als_thresh_low: CH0 'low' count to trigger interrupt. + * @als_thresh_high: CH0 'high' count to trigger interrupt. + * @prox_thres_low: Low threshold proximity detection. + * @prox_thres_high: High threshold proximity detection + * @prox_pulse_count: Number if proximity emitter pulses + * @prox_max_samples_cal: Used for prox cal. + */ +struct tsl2x7x_settings { + int als_time; + int als_gain; + int als_gain_trim; + int wait_time; + int prx_time; + int prox_gain; + int prox_config; + int als_cal_target; + u8 interrupts_en; + u8 persistence; + int als_thresh_low; + int als_thresh_high; + int prox_thres_low; + int prox_thres_high; + int prox_pulse_count; + int prox_max_samples_cal; +}; + +/** + * struct tsl2X7X_platform_data - Platform callback, glass and defaults + * @platform_power: Suspend/resume platform callback + * @power_on: Power on callback + * @power_off: Power off callback + * @platform_lux_table: Device specific glass coefficents + * @platform_default_settings: Device specific power on defaults + * + */ +struct tsl2X7X_platform_data { + int (*platform_power)(struct device *dev, pm_message_t); + int (*power_on) (struct iio_dev *indio_dev); + int (*power_off) (struct i2c_client *dev); + struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE]; + struct tsl2x7x_settings *platform_default_settings; +}; + +#endif /* __TSL2X7X_H */ diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c new file mode 100755 index 0000000000000000000000000000000000000000..ff449894a94ad7b112fce49054a75cce7e4ae9db --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.c @@ -0,0 +1,2072 @@ +/* + * Device driver for monitoring ambient light intensity in (lux) + * and proximity detection (prox) within the TAOS TSL2X7X family of devices. + * + * Copyright (c) 2012, TAOS Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "tsl2x7x.h" +#include "../events.h" +#include "../iio.h" +#include "../sysfs.h" + +/* Cal defs*/ +#define PROX_STAT_CAL 0 +#define PROX_STAT_SAMP 1 +#define MAX_SAMPLES_CAL 200 + +/* TSL2X7X Device ID */ +#define TRITON_ID 0x00 +#define SWORDFISH_ID 0x30 +#define HALIBUT_ID 0x20 + +/* Lux calculation constants */ +#define TSL2X7X_LUX_CALC_OVER_FLOW 65535 + +/* TAOS Register definitions - note: + * depending on device, some of these register are not used and the + * register address is benign. + */ +/* 2X7X register offsets */ +#define TSL2X7X_MAX_CONFIG_REG 16 + +/* Device Registers and Masks */ +#define TSL2X7X_CNTRL 0x00 +#define TSL2X7X_ALS_TIME 0X01 +#define TSL2X7X_PRX_TIME 0x02 +#define TSL2X7X_WAIT_TIME 0x03 +#define TSL2X7X_ALS_MINTHRESHLO 0X04 +#define TSL2X7X_ALS_MINTHRESHHI 0X05 +#define TSL2X7X_ALS_MAXTHRESHLO 0X06 +#define TSL2X7X_ALS_MAXTHRESHHI 0X07 +#define TSL2X7X_PRX_MINTHRESHLO 0X08 +#define TSL2X7X_PRX_MINTHRESHHI 0X09 +#define TSL2X7X_PRX_MAXTHRESHLO 0X0A +#define TSL2X7X_PRX_MAXTHRESHHI 0X0B +#define TSL2X7X_PERSISTENCE 0x0C +#define TSL2X7X_PRX_CONFIG 0x0D +#define TSL2X7X_PRX_COUNT 0x0E +#define TSL2X7X_GAIN 0x0F +#define TSL2X7X_NOTUSED 0x10 +#define TSL2X7X_REVID 0x11 +#define TSL2X7X_CHIPID 0x12 +#define TSL2X7X_STATUS 0x13 +#define TSL2X7X_ALS_CHAN0LO 0x14 +#define TSL2X7X_ALS_CHAN0HI 0x15 +#define TSL2X7X_ALS_CHAN1LO 0x16 +#define TSL2X7X_ALS_CHAN1HI 0x17 +#define TSL2X7X_PRX_LO 0x18 +#define TSL2X7X_PRX_HI 0x19 + +/* tsl2X7X cmd reg masks */ +#define TSL2X7X_CMD_REG 0x80 +#define TSL2X7X_CMD_SPL_FN 0x60 + +#define TSL2X7X_CMD_PROX_INT_CLR 0X05 +#define TSL2X7X_CMD_ALS_INT_CLR 0x06 +#define TSL2X7X_CMD_PROXALS_INT_CLR 0X07 + +/* tsl2X7X cntrl reg masks */ +#define TSL2X7X_CNTL_ADC_ENBL 0x02 +#define TSL2X7X_CNTL_PWR_ON 0x01 + +/* tsl2X7X status reg masks */ +#define TSL2X7X_STA_ADC_VALID 0x01 +#define TSL2X7X_STA_PRX_VALID 0x02 +#define TSL2X7X_STA_ADC_PRX_VALID (TSL2X7X_STA_ADC_VALID |\ + TSL2X7X_STA_PRX_VALID) +#define TSL2X7X_STA_ALS_INTR 0x10 +#define TSL2X7X_STA_PRX_INTR 0x20 + +/* tsl2X7X cntrl reg masks */ +#define TSL2X7X_CNTL_REG_CLEAR 0x00 +#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20 +#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10 +#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08 +#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04 +#define TSL2X7X_CNTL_PWRON 0x01 +#define TSL2X7X_CNTL_ALSPON_ENBL 0x03 +#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13 +#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F +#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F + +/*Prox diode to use */ +#define TSL2X7X_DIODE0 0x10 +#define TSL2X7X_DIODE1 0x20 +#define TSL2X7X_DIODE_BOTH 0x30 + +/* LED Power */ +#define TSL2X7X_mA100 0x00 +#define TSL2X7X_mA50 0x40 +#define TSL2X7X_mA25 0x80 +#define TSL2X7X_mA13 0xD0 +#define TSL2X7X_MAX_TIMER_CNT (0xFF) + +/*Common device IIO EventMask */ +#define TSL2X7X_EVENT_MASK \ + (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \ + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)), + +/* TAOS txx2x7x Device family members */ +enum { + tsl2571, + tsl2671, + tmd2671, + tsl2771, + tmd2771, + tsl2572, + tsl2672, + tmd2672, + tsl2772, + tmd2772 +}; + +enum { + TSL2X7X_CHIP_UNKNOWN = 0, + TSL2X7X_CHIP_WORKING = 1, + TSL2X7X_CHIP_SUSPENDED = 2 +}; + +struct tsl2x7x_parse_result { + int integer; + int fract; +}; + +/* Per-device data */ +struct tsl2x7x_als_info { + u16 als_ch0; + u16 als_ch1; + u16 lux; +}; + +struct tsl2x7x_prox_stat { + int min; + int max; + int mean; + unsigned long stddev; +}; + +struct tsl2x7x_chip_info { + int chan_table_elements; + struct iio_chan_spec channel[4]; + const struct iio_info *info; +}; + +struct tsl2X7X_chip { + kernel_ulong_t id; + struct mutex prox_mutex; + struct mutex als_mutex; + struct i2c_client *client; + u16 prox_data; + struct tsl2x7x_als_info als_cur_info; + struct tsl2x7x_settings tsl2x7x_settings; + struct tsl2X7X_platform_data *pdata; + int als_time_scale; + int als_saturation; + int tsl2x7x_chip_status; + u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG]; + const struct tsl2x7x_chip_info *chip_info; + const struct iio_info *info; + s64 event_timestamp; + /* This structure is intentionally large to accommodate + * updates via sysfs. */ + /* Sized to 9 = max 8 segments + 1 termination segment */ + struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE]; +}; + +/* Different devices require different coefficents */ +static const struct tsl2x7x_lux tsl2x71_lux_table[] = { + { 14461, 611, 1211 }, + { 18540, 352, 623 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x71_lux_table[] = { + { 11635, 115, 256 }, + { 15536, 87, 179 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tsl2x72_lux_table[] = { + { 14013, 466, 917 }, + { 18222, 310, 552 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x72_lux_table[] = { + { 13218, 130, 262 }, + { 17592, 92, 169 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = { + [tsl2571] = tsl2x71_lux_table, + [tsl2671] = tsl2x71_lux_table, + [tmd2671] = tmd2x71_lux_table, + [tsl2771] = tsl2x71_lux_table, + [tmd2771] = tmd2x71_lux_table, + [tsl2572] = tsl2x72_lux_table, + [tsl2672] = tsl2x72_lux_table, + [tmd2672] = tmd2x72_lux_table, + [tsl2772] = tsl2x72_lux_table, + [tmd2772] = tmd2x72_lux_table, +}; + +static const struct tsl2x7x_settings tsl2x7x_default_settings = { + .als_time = 219, /* 101 ms */ + .als_gain = 0, + .prx_time = 254, /* 5.4 ms */ + .prox_gain = 1, + .wait_time = 245, + .prox_config = 0, + .als_gain_trim = 1000, + .als_cal_target = 150, + .als_thresh_low = 200, + .als_thresh_high = 256, + .persistence = 255, + .interrupts_en = 0, + .prox_thres_low = 0, + .prox_thres_high = 512, + .prox_max_samples_cal = 30, + .prox_pulse_count = 8 +}; + +static const s16 tsl2X7X_als_gainadj[] = { + 1, + 8, + 16, + 120 +}; + +static const s16 tsl2X7X_prx_gainadj[] = { + 1, + 2, + 4, + 8 +}; + +/* Channel variations */ +enum { + ALS, + PRX, + ALSPRX, + PRX2, + ALSPRX2, +}; + +const u8 device_channel_config[] = { + ALS, + PRX, + PRX, + ALSPRX, + ALSPRX, + ALS, + PRX2, + PRX2, + ALSPRX2, + ALSPRX2 +}; + +/** + * tsl2x7x_parse_buffer() - parse a decimal result from a buffer. + * @*buf: pointer to char buffer to parse + * @*result: pointer to buffer to contain + * resulting interger / decimal as ints. + * + */ +static int +tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result) +{ + int integer = 0, fract = 0, fract_mult = 100000; + bool integer_part = true, negative = false; + + if (buf[0] == '-') { + negative = true; + buf++; + } + + while (*buf) { + if ('0' <= *buf && *buf <= '9') { + if (integer_part) + integer = integer*10 + *buf - '0'; + else { + fract += fract_mult*(*buf - '0'); + if (fract_mult == 1) + break; + fract_mult /= 10; + } + } else if (*buf == '\n') { + if (*(buf + 1) == '\0') + break; + else + return -EINVAL; + } else if (*buf == '.') { + integer_part = false; + } else { + return -EINVAL; + } + buf++; + } + if (negative) { + if (integer) + integer = -integer; + else + fract = -fract; + } + + result->integer = integer; + result->fract = fract; + + return 0; +} + +/** + * tsl2x7x_i2c_read() - Read a byte from a register. + * @client: i2c client + * @reg: device register to read from + * @*val: pointer to location to store register contents. + * + */ +static int +tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val) +{ + int ret = 0; + + /* select register to write */ + ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg)); + if (ret < 0) { + dev_err(&client->dev, "%s: failed to write register %x\n" + , __func__, reg); + return ret; + } + + /* read the data */ + ret = i2c_smbus_read_byte(client); + if (ret >= 0) + *val = (u8)ret; + else + dev_err(&client->dev, "%s: failed to read register %x\n" + , __func__, reg); + + return ret; +} + +/** + * tsl2x7x_get_lux() - Reads and calculates current lux value. + * @indio_dev: pointer to IIO device + * + * The raw ch0 and ch1 values of the ambient light sensed in the last + * integration cycle are read from the device. + * Time scale factor array values are adjusted based on the integration time. + * The raw values are multiplied by a scale factor, and device gain is obtained + * using gain index. Limit checks are done next, then the ratio of a multiple + * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[] + * is then scanned to find the first ratio value that is just above the ratio + * we just calculated. The ch0 and ch1 multiplier constants in the array are + * then used along with the time scale factor array values, to calculate the + * lux. + */ +static int tsl2x7x_get_lux(struct iio_dev *indio_dev) +{ + u16 ch0, ch1; /* separated ch0/ch1 data from device */ + u32 lux; /* raw lux calculated from device data */ + u64 lux64; + u32 ratio; + u8 buf[4]; + struct tsl2x7x_lux *p; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int i, ret; + u32 ch0lux = 0; + u32 ch1lux = 0; + + if (mutex_trylock(&chip->als_mutex) == 0) + return chip->als_cur_info.lux; /* busy, so return LAST VALUE */ + + if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) { + /* device is not enabled */ + dev_err(&chip->client->dev, "%s: device is not enabled\n", + __func__); + ret = -EBUSY ; + goto out_unlock; + } + + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: Failed to read STATUS Reg\n", __func__); + goto out_unlock; + } + /* is data new & valid */ + if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) { + dev_err(&chip->client->dev, + "%s: data not valid yet\n", __func__); + ret = chip->als_cur_info.lux; /* return LAST VALUE */ + goto out_unlock; + } + + for (i = 0; i < 4; i++) { + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)), + &buf[i]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to read. err=%x\n", __func__, ret); + goto out_unlock; + } + } + + /* clear any existing interrupt status */ + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | + TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_ALS_INT_CLR)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: i2c_write_command failed - err = %d\n", + __func__, ret); + goto out_unlock; /* have no data, so return failure */ + } + + /* extract ALS/lux data */ + ch0 = le16_to_cpup((const __le16 *)&buf[0]); + ch1 = le16_to_cpup((const __le16 *)&buf[2]); + + chip->als_cur_info.als_ch0 = ch0; + chip->als_cur_info.als_ch1 = ch1; + + if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) { + lux = TSL2X7X_LUX_CALC_OVER_FLOW; + goto return_max; + } + + if (ch0 == 0) { + /* have no data, so return LAST VALUE */ + ret = chip->als_cur_info.lux; + goto out_unlock; + } + /* calculate ratio */ + ratio = (ch1 << 15) / ch0; + /* convert to unscaled lux using the pointer to the table */ + p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux; + while (p->ratio != 0 && p->ratio < ratio) + p++; + + if (p->ratio == 0) { + lux = 0; + } else { + ch0lux = DIV_ROUND_UP((ch0 * p->ch0), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + ch1lux = DIV_ROUND_UP((ch1 * p->ch1), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + lux = ch0lux - ch1lux; + } + + /* note: lux is 31 bit max at this point */ + if (ch1lux > ch0lux) { + dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n"); + ret = chip->als_cur_info.lux; + goto out_unlock; + } + + /* adjust for active time scale */ + if (chip->als_time_scale == 0) + lux = 0; + else + lux = (lux + (chip->als_time_scale >> 1)) / + chip->als_time_scale; + + /* adjust for active gain scale + * The tsl2x7x_device_lux tables have a factor of 256 built-in. + * User-specified gain provides a multiplier. + * Apply user-specified gain before shifting right to retain precision. + * Use 64 bits to avoid overflow on multiplication. + * Then go back to 32 bits before division to avoid using div_u64(). + */ + + lux64 = lux; + lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim; + lux64 >>= 8; + lux = lux64; + lux = (lux + 500) / 1000; + + if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */ + lux = TSL2X7X_LUX_CALC_OVER_FLOW; + + /* Update the structure with the latest lux. */ +return_max: + chip->als_cur_info.lux = lux; + ret = lux; + +out_unlock: + mutex_unlock(&chip->als_mutex); + + return ret; +} + +/** + * tsl2x7x_get_prox() - Reads proximity data registers and updates + * chip->prox_data. + * + * @indio_dev: pointer to IIO device + */ +static int tsl2x7x_get_prox(struct iio_dev *indio_dev) +{ + int i; + int ret; + u8 status; + u8 chdata[2]; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (mutex_trylock(&chip->prox_mutex) == 0) { + dev_err(&chip->client->dev, + "%s: Can't get prox mutex\n", __func__); + return -EBUSY; + } + + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: i2c err=%d\n", __func__, ret); + goto prox_poll_err; + } + + switch (chip->id) { + case tsl2571: + case tsl2671: + case tmd2671: + case tsl2771: + case tmd2771: + if (!(status & TSL2X7X_STA_ADC_VALID)) + goto prox_poll_err; + break; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + if (!(status & TSL2X7X_STA_PRX_VALID)) + goto prox_poll_err; + break; + } + + for (i = 0; i < 2; i++) { + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | + (TSL2X7X_PRX_LO + i)), &chdata[i]); + if (ret < 0) + goto prox_poll_err; + } + + chip->prox_data = + le16_to_cpup((const __le16 *)&chdata[0]); + +prox_poll_err: + + mutex_unlock(&chip->prox_mutex); + + return chip->prox_data; +} + +/** + * tsl2x7x_defaults() - Populates the device nominal operating parameters + * with those provided by a 'platform' data struct or + * with prefined defaults. + * + * @chip: pointer to device structure. + */ +static void tsl2x7x_defaults(struct tsl2X7X_chip *chip) +{ + /* If Operational settings defined elsewhere.. */ + if (chip->pdata && chip->pdata->platform_default_settings != 0) + memcpy(&(chip->tsl2x7x_settings), + chip->pdata->platform_default_settings, + sizeof(tsl2x7x_default_settings)); + else + memcpy(&(chip->tsl2x7x_settings), + &tsl2x7x_default_settings, + sizeof(tsl2x7x_default_settings)); + + /* Load up the proper lux table. */ + if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0) + memcpy(chip->tsl2x7x_device_lux, + chip->pdata->platform_lux_table, + sizeof(chip->pdata->platform_lux_table)); + else + memcpy(chip->tsl2x7x_device_lux, + (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id], + MAX_DEFAULT_TABLE_BYTES); +} + +/** + * tsl2x7x_als_calibrate() - Obtain single reading and calculate + * the als_gain_trim. + * + * @indio_dev: pointer to IIO device + */ +static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 reg_val; + int gain_trim_val; + int ret; + int lux_val; + + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to write CNTRL register, ret=%d\n", + __func__, ret); + return ret; + } + + reg_val = i2c_smbus_read_byte(chip->client); + if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) + != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) { + dev_err(&chip->client->dev, + "%s: failed: ADC not enabled\n", __func__); + return -1; + } + + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to write ctrl reg: ret=%d\n", + __func__, ret); + return ret; + } + + reg_val = i2c_smbus_read_byte(chip->client); + if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) { + dev_err(&chip->client->dev, + "%s: failed: STATUS - ADC not valid.\n", __func__); + return -ENODATA; + } + + lux_val = tsl2x7x_get_lux(indio_dev); + if (lux_val < 0) { + dev_err(&chip->client->dev, + "%s: failed to get lux\n", __func__); + return lux_val; + } + + gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target) + * chip->tsl2x7x_settings.als_gain_trim) / lux_val); + if ((gain_trim_val < 250) || (gain_trim_val > 4000)) + return -ERANGE; + + chip->tsl2x7x_settings.als_gain_trim = gain_trim_val; + dev_info(&chip->client->dev, + "%s als_calibrate completed\n", chip->client->name); + + return (int) gain_trim_val; +} + +static int tsl2x7x_chip_on(struct iio_dev *indio_dev) +{ + int i; + int ret = 0; + u8 *dev_reg; + u8 utmp; + int als_count; + int als_time; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 reg_val = 0; + + if (chip->pdata && chip->pdata->power_on) + chip->pdata->power_on(indio_dev); + + /* Non calculated parameters */ + chip->tsl2x7x_config[TSL2X7X_PRX_TIME] = + chip->tsl2x7x_settings.prx_time; + chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] = + chip->tsl2x7x_settings.wait_time; + chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] = + chip->tsl2x7x_settings.prox_config; + + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] = + (chip->tsl2x7x_settings.als_thresh_low) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] = + (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] = + (chip->tsl2x7x_settings.als_thresh_high) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] = + (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] = + chip->tsl2x7x_settings.persistence; + + chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] = + chip->tsl2x7x_settings.prox_pulse_count; + chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] = + chip->tsl2x7x_settings.prox_thres_low; + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] = + chip->tsl2x7x_settings.prox_thres_high; + + /* and make sure we're not already on */ + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) { + /* if forcing a register update - turn off, then on */ + dev_info(&chip->client->dev, "device is already enabled\n"); + return -EINVAL; + } + + /* determine als integration regster */ + als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270; + if (als_count == 0) + als_count = 1; /* ensure at least one cycle */ + + /* convert back to time (encompasses overrides) */ + als_time = (als_count * 27 + 5) / 10; + chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count; + + /* Set the gain based on tsl2x7x_settings struct */ + chip->tsl2x7x_config[TSL2X7X_GAIN] = + (chip->tsl2x7x_settings.als_gain | + (TSL2X7X_mA100 | TSL2X7X_DIODE1) + | ((chip->tsl2x7x_settings.prox_gain) << 2)); + + /* set chip struct re scaling and saturation */ + chip->als_saturation = als_count * 922; /* 90% of full scale */ + chip->als_time_scale = (als_time + 25) / 50; + + /* TSL2X7X Specific power-on / adc enable sequence + * Power on the device 1st. */ + utmp = TSL2X7X_CNTL_PWR_ON; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on CNTRL reg.\n", __func__); + return ret; + } + + /* Use the following shadow copy for our delay before enabling ADC. + * Write all the registers. */ + for (i = 0, dev_reg = chip->tsl2x7x_config; + i < TSL2X7X_MAX_CONFIG_REG; i++) { + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG + i, *dev_reg++); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on write to reg %d.\n", __func__, i); + return ret; + } + } + + udelay(3000); /* Power-on settling time */ + + /* NOW enable the ADC + * initialize the desired mode of operation */ + utmp = TSL2X7X_CNTL_PWR_ON | + TSL2X7X_CNTL_ADC_ENBL | + TSL2X7X_CNTL_PROX_DET_ENBL; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on 2nd CTRL reg.\n", __func__); + return ret; + } + + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING; + + if (chip->tsl2x7x_settings.interrupts_en != 0) { + dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n"); + + reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL; + if ((chip->tsl2x7x_settings.interrupts_en == 0x20) || + (chip->tsl2x7x_settings.interrupts_en == 0x30)) + reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL; + + reg_val |= chip->tsl2x7x_settings.interrupts_en; + ret = i2c_smbus_write_byte_data(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val); + if (ret < 0) + dev_err(&chip->client->dev, + "%s: failed in tsl2x7x_IOCTL_INT_SET.\n", + __func__); + + /* Clear out any initial interrupts */ + ret = i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INT_CLR); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: Failed to clear Int status\n", + __func__); + return ret; + } + } + + return ret; +} + +static int tsl2x7x_chip_off(struct iio_dev *indio_dev) +{ + int ret; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + /* turn device off */ + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED; + + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00); + + if (chip->pdata && chip->pdata->power_off) + chip->pdata->power_off(chip->client); + + return ret; +} + +/** + * tsl2x7x_invoke_change + * @indio_dev: pointer to IIO device + * + * Obtain and lock both ALS and PROX resources, + * determine and save device state (On/Off), + * cycle device to implement updated parameter, + * put device back into proper state, and unlock + * resource. + */ +int tsl2x7x_invoke_change(struct iio_dev *indio_dev) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int device_status = chip->tsl2x7x_chip_status; + + mutex_lock(&chip->als_mutex); + mutex_lock(&chip->prox_mutex); + + if (device_status == TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_off(indio_dev); + + tsl2x7x_chip_on(indio_dev); + + if (device_status != TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_off(indio_dev); + + mutex_unlock(&chip->prox_mutex); + mutex_unlock(&chip->als_mutex); + + return 0; +} + +static +void tsl2x7x_prox_calculate(int *data, int length, + struct tsl2x7x_prox_stat *statP) +{ + int i; + int sample_sum; + int tmp; + + if (length == 0) + length = 1; + + sample_sum = 0; + statP->min = INT_MAX; + statP->max = INT_MIN; + for (i = 0; i < length; i++) { + sample_sum += data[i]; + statP->min = min(statP->min, data[i]); + statP->max = max(statP->max, data[i]); + } + + statP->mean = sample_sum / length; + sample_sum = 0; + for (i = 0; i < length; i++) { + tmp = data[i] - statP->mean; + sample_sum += tmp * tmp; + } + statP->stddev = int_sqrt((long)sample_sum)/length; +} + +/** + * tsl2x7x_prox_cal() - Calculates std. and sets thresholds. + * @indio_dev: pointer to IIO device + * + * Calculates a standard deviation based on the samples, + * and sets the threshold accordingly. + */ +static void tsl2x7x_prox_cal(struct iio_dev *indio_dev) +{ + int prox_history[MAX_SAMPLES_CAL + 1]; + int i; + struct tsl2x7x_prox_stat prox_stat_data[2]; + struct tsl2x7x_prox_stat *calP; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 tmp_irq_settings; + u8 current_state = chip->tsl2x7x_chip_status; + + if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) { + dev_err(&chip->client->dev, + "%s: max prox samples cal is too big: %d\n", + __func__, chip->tsl2x7x_settings.prox_max_samples_cal); + chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL; + } + + /* have to stop to change settings */ + tsl2x7x_chip_off(indio_dev); + + /* Enable proximity detection save just in case prox not wanted yet*/ + tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en; + chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL; + + /*turn on device if not already on*/ + tsl2x7x_chip_on(indio_dev); + + /*gather the samples*/ + for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) { + mdelay(15); + tsl2x7x_get_prox(indio_dev); + prox_history[i] = chip->prox_data; + dev_info(&chip->client->dev, "2 i=%d prox data= %d\n", + i, chip->prox_data); + } + + tsl2x7x_chip_off(indio_dev); + calP = &prox_stat_data[PROX_STAT_CAL]; + tsl2x7x_prox_calculate(prox_history, + chip->tsl2x7x_settings.prox_max_samples_cal, calP); + chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean; + + dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n", + calP->min, calP->mean, calP->max); + dev_info(&chip->client->dev, + "%s proximity threshold set to %d\n", + chip->client->name, chip->tsl2x7x_settings.prox_thres_high); + + /* back to the way they were */ + chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings; + if (current_state == TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_on(indio_dev); +} + +static ssize_t tsl2x7x_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + + return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status); +} + +static ssize_t tsl2x7x_power_state_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_chip_on(indio_dev); + else + tsl2x7x_chip_off(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + + switch (chip->id) { + case tsl2571: + case tsl2671: + case tmd2671: + case tsl2771: + case tmd2771: + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128"); + break; + } + + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120"); +} + +static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8"); +} + +static ssize_t tsl2x7x_als_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + int y, z; + + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * 2.72; + y /= 1000; + z %= 1000; + + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z); +} + +static ssize_t tsl2x7x_als_time_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + struct tsl2x7x_parse_result result; + + result.integer = 0; + result.fract = 0; + + tsl2x7x_parse_buffer(buf, &result); + + result.fract /= 1000; + result.fract /= 3; + chip->tsl2x7x_settings.als_time = + (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract); + + dev_info(&chip->client->dev, "%s: als time = %d", + __func__, chip->tsl2x7x_settings.als_time); + + tsl2x7x_invoke_change(indio_dev); + + return IIO_VAL_INT_PLUS_MICRO; +} + +static IIO_CONST_ATTR(in_illuminance0_integration_time_available, + ".00272 - .696"); + +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_cal_target); +} + +static ssize_t tsl2x7x_als_cal_target_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->tsl2x7x_settings.als_cal_target = value; + + tsl2x7x_invoke_change(indio_dev); + + return len; +} + +/* persistence settings */ +static ssize_t tsl2x7x_als_persistence_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + int y, z, filter_delay; + + /* Determine integration time */ + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * 2.72; + filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F); + y = (filter_delay / 1000); + z = (filter_delay % 1000); + + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z); +} + +static ssize_t tsl2x7x_als_persistence_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + struct tsl2x7x_parse_result result; + int y, z, filter_delay; + + result.integer = 0; + result.fract = 0; + tsl2x7x_parse_buffer(buf, &result); + + result.fract /= 1000; + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * 2.72; + + filter_delay = + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z); + + chip->tsl2x7x_settings.persistence &= 0xF0; + chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F); + + dev_info(&chip->client->dev, "%s: als persistence = %d", + __func__, filter_delay); + + tsl2x7x_invoke_change(indio_dev); + + return IIO_VAL_INT_PLUS_MICRO; +} + +static ssize_t tsl2x7x_prox_persistence_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + int y, z, filter_delay; + + /* Determine integration time */ + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1; + z = y * 2.72; + filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4); + y = (filter_delay / 1000); + z = (filter_delay % 1000); + + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z); +} + +static ssize_t tsl2x7x_prox_persistence_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + struct tsl2x7x_parse_result result; + int y, z, filter_delay; + + result.integer = 0; + result.fract = 0; + tsl2x7x_parse_buffer(buf, &result); + + result.fract /= 1000; + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1; + z = y * 2.72; + + filter_delay = + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z); + + chip->tsl2x7x_settings.persistence &= 0x0F; + chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0); + + dev_info(&chip->client->dev, "%s: prox persistence = %d", + __func__, filter_delay); + + tsl2x7x_invoke_change(indio_dev); + + return IIO_VAL_INT_PLUS_MICRO; +} + +static ssize_t tsl2x7x_do_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_als_calibrate(indio_dev); + + tsl2x7x_invoke_change(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_luxtable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + int i = 0; + int offset = 0; + + while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) { + offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,", + chip->tsl2x7x_device_lux[i].ratio, + chip->tsl2x7x_device_lux[i].ch0, + chip->tsl2x7x_device_lux[i].ch1); + if (chip->tsl2x7x_device_lux[i].ratio == 0) { + /* We just printed the first "0" entry. + * Now get rid of the extra "," and break. */ + offset--; + break; + } + i++; + } + + offset += snprintf(buf + offset, PAGE_SIZE, "\n"); + return offset; +} + +static ssize_t tsl2x7x_luxtable_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev)); + int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1]; + int n; + + get_options(buf, ARRAY_SIZE(value), value); + + /* We now have an array of ints starting at value[1], and + * enumerated by value[0]. + * We expect each group of three ints is one table entry, + * and the last table entry is all 0. + */ + n = value[0]; + if ((n % 3) || n < 6 || + n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) { + dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n); + return -EINVAL; + } + + if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) { + dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n); + return -EINVAL; + } + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_off(indio_dev); + + /* Zero out the table */ + memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux)); + memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4)); + + tsl2x7x_invoke_change(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_prox_cal(indio_dev); + + tsl2x7x_invoke_change(indio_dev); + + return len; +} + +static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret; + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10); + else + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20); + + return ret; +} + +static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) { + if (val) + chip->tsl2x7x_settings.interrupts_en |= 0x10; + else + chip->tsl2x7x_settings.interrupts_en &= 0x20; + } else { + if (val) + chip->tsl2x7x_settings.interrupts_en |= 0x20; + else + chip->tsl2x7x_settings.interrupts_en &= 0x10; + } + + tsl2x7x_invoke_change(indio_dev); + + return 0; +} + +static int tsl2x7x_write_thresh(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.als_thresh_high = val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.als_thresh_low = val; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.prox_thres_high = val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.prox_thres_low = val; + break; + default: + return -EINVAL; + } + } + + tsl2x7x_invoke_change(indio_dev); + + return 0; +} + +static int tsl2x7x_read_thresh(struct iio_dev *indio_dev, + u64 event_code, + int *val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val = chip->tsl2x7x_settings.als_thresh_high; + break; + case IIO_EV_DIR_FALLING: + *val = chip->tsl2x7x_settings.als_thresh_low; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val = chip->tsl2x7x_settings.prox_thres_high; + break; + case IIO_EV_DIR_FALLING: + *val = chip->tsl2x7x_settings.prox_thres_low; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int tsl2x7x_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + int ret = -EINVAL; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_LIGHT: + tsl2x7x_get_lux(indio_dev); + *val = chip->als_cur_info.lux; + ret = IIO_VAL_INT; + break; + case IIO_INTENSITY: + tsl2x7x_get_lux(indio_dev); + if (chan->channel == 0) + *val = chip->als_cur_info.als_ch0; + else + *val = chip->als_cur_info.als_ch1; + ret = IIO_VAL_INT; + break; + case IIO_PROXIMITY: + tsl2x7x_get_prox(indio_dev); + *val = chip->prox_data; + ret = IIO_VAL_INT; + break; + default: + return -EINVAL; + break; + } + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type == IIO_LIGHT) + *val = + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]; + else + *val = + tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain]; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBBIAS: + *val = chip->tsl2x7x_settings.als_gain_trim; + ret = IIO_VAL_INT; + break; + + default: + ret = -EINVAL; + } + + return ret; +} + +static int tsl2x7x_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type == IIO_INTENSITY) { + switch (val) { + case 1: + chip->tsl2x7x_settings.als_gain = 0; + break; + case 8: + chip->tsl2x7x_settings.als_gain = 1; + break; + case 16: + chip->tsl2x7x_settings.als_gain = 2; + break; + case 120: + switch (chip->id) { + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return -EINVAL; + break; + } + chip->tsl2x7x_settings.als_gain = 3; + break; + case 128: + switch (chip->id) { + case tsl2571: + case tsl2671: + case tmd2671: + case tsl2771: + case tmd2771: + return -EINVAL; + break; + } + chip->tsl2x7x_settings.als_gain = 3; + break; + default: + return -EINVAL; + } + } else { + switch (val) { + case 1: + chip->tsl2x7x_settings.prox_gain = 0; + break; + case 2: + chip->tsl2x7x_settings.prox_gain = 1; + break; + case 4: + chip->tsl2x7x_settings.prox_gain = 2; + break; + case 8: + chip->tsl2x7x_settings.prox_gain = 3; + break; + default: + return -EINVAL; + } + } + break; + case IIO_CHAN_INFO_CALIBBIAS: + chip->tsl2x7x_settings.als_gain_trim = val; + break; + + default: + return -EINVAL; + } + + tsl2x7x_invoke_change(indio_dev); + + return 0; +} + +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, + tsl2x7x_power_state_show, tsl2x7x_power_state_store); + +static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO, + tsl2x7x_prox_gain_available_show, NULL); + +static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO, + tsl2x7x_gain_available_show, NULL); + +static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR, + tsl2x7x_als_time_show, tsl2x7x_als_time_store); + +static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR, + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store); + +static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL, + tsl2x7x_do_calibrate); + +static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL, + tsl2x7x_do_prox_calibrate); + +static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR, + tsl2x7x_luxtable_show, tsl2x7x_luxtable_store); + +static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR, + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store); + +static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR, + tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store); + +/* Use the default register values to identify the Taos device */ +static int tsl2x7x_device_id(unsigned char *id, int target) +{ + switch (target) { + case tsl2571: + case tsl2671: + case tsl2771: + return ((*id & 0xf0) == TRITON_ID); + break; + case tmd2671: + case tmd2771: + return ((*id & 0xf0) == HALIBUT_ID); + break; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return ((*id & 0xf0) == SWORDFISH_ID); + break; + } + + return -EINVAL; +} + +static irqreturn_t tsl2x7x_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + s64 timestamp = iio_get_time_ns(); + int ret; + u8 value; + + value = i2c_smbus_read_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_STATUS); + + /* What type of interrupt do we need to process */ + if (value & TSL2X7X_STA_PRX_INTR) { + tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */ + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + } + + if (value & TSL2X7X_STA_ALS_INTR) { + tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */ + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_LIGHT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + } + /* Clear interrupt now that we have handled it. */ + ret = i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INT_CLR); + if (ret < 0) + dev_err(&chip->client->dev, + "%s: Failed to clear irq from event handler. err = %d\n", + __func__, ret); + + return IRQ_HANDLED; +} + +static struct attribute *tsl2x7x_ALS_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_in_illuminance0_calibscale_available.attr, + &dev_attr_in_illuminance0_integration_time.attr, + &iio_const_attr_in_illuminance0_integration_time_available\ + .dev_attr.attr, + &dev_attr_in_illuminance0_target_input.attr, + &dev_attr_in_illuminance0_calibrate.attr, + &dev_attr_in_illuminance0_lux_table.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_in_proximity0_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_in_illuminance0_calibscale_available.attr, + &dev_attr_in_illuminance0_integration_time.attr, + &iio_const_attr_in_illuminance0_integration_time_available\ + .dev_attr.attr, + &dev_attr_in_illuminance0_target_input.attr, + &dev_attr_in_illuminance0_calibrate.attr, + &dev_attr_in_illuminance0_lux_table.attr, + &dev_attr_in_proximity0_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX2_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_in_proximity0_calibrate.attr, + &dev_attr_in_proximity0_calibscale_available.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_in_illuminance0_calibscale_available.attr, + &dev_attr_in_illuminance0_integration_time.attr, + &iio_const_attr_in_illuminance0_integration_time_available\ + .dev_attr.attr, + &dev_attr_in_illuminance0_target_input.attr, + &dev_attr_in_illuminance0_calibrate.attr, + &dev_attr_in_illuminance0_lux_table.attr, + &dev_attr_in_proximity0_calibrate.attr, + &dev_attr_in_proximity0_calibscale_available.attr, + NULL +}; + +static struct attribute *tsl2X7X_ALS_event_attrs[] = { + &dev_attr_in_intensity0_thresh_period.attr, + NULL, +}; +static struct attribute *tsl2X7X_PRX_event_attrs[] = { + &dev_attr_in_proximity0_thresh_period.attr, + NULL, +}; + +static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = { + &dev_attr_in_intensity0_thresh_period.attr, + &dev_attr_in_proximity0_thresh_period.attr, + NULL, +}; + +static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = { + [ALS] = { + .attrs = tsl2x7x_ALS_device_attrs, + }, + [PRX] = { + .attrs = tsl2x7x_PRX_device_attrs, + }, + [ALSPRX] = { + .attrs = tsl2x7x_ALSPRX_device_attrs, + }, + [PRX2] = { + .attrs = tsl2x7x_PRX2_device_attrs, + }, + [ALSPRX2] = { + .attrs = tsl2x7x_ALSPRX2_device_attrs, + }, +}; + +static struct attribute_group tsl2X7X_event_attr_group_tbl[] = { + [ALS] = { + .attrs = tsl2X7X_ALS_event_attrs, + .name = "events", + }, + [PRX] = { + .attrs = tsl2X7X_PRX_event_attrs, + .name = "events", + }, + [ALSPRX] = { + .attrs = tsl2X7X_ALSPRX_event_attrs, + .name = "events", + }, +}; + +static const struct iio_info tsl2X7X_device_info[] = { + [ALS] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALS], + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [PRX] = { + .attrs = &tsl2X7X_device_attr_group_tbl[PRX], + .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [ALSPRX] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX], + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [PRX2] = { + .attrs = &tsl2X7X_device_attr_group_tbl[PRX2], + .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [ALSPRX2] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2], + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, +}; + +static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = { + [ALS] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT, + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 1, + }, + }, + .chan_table_elements = 3, + .info = &tsl2X7X_device_info[ALS], + }, + [PRX] = { + .channel = { + { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .chan_table_elements = 1, + .info = &tsl2X7X_device_info[PRX], + }, + [ALSPRX] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 1, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + }, { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .chan_table_elements = 4, + .info = &tsl2X7X_device_info[ALSPRX], + }, + [PRX2] = { + .channel = { + { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .chan_table_elements = 1, + .info = &tsl2X7X_device_info[PRX2], + }, + [ALSPRX2] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT, + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 1, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + }, { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .chan_table_elements = 4, + .info = &tsl2X7X_device_info[ALSPRX2], + }, +}; + +static int __devinit tsl2x7x_probe(struct i2c_client *clientp, + const struct i2c_device_id *id) +{ + int ret; + unsigned char device_id; + struct iio_dev *indio_dev; + struct tsl2X7X_chip *chip; + + indio_dev = iio_allocate_device(sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip = iio_priv(indio_dev); + chip->client = clientp; + i2c_set_clientdata(clientp, indio_dev); + + ret = tsl2x7x_i2c_read(chip->client, + TSL2X7X_CHIPID, &device_id); + if (ret < 0) + goto fail1; + + if ((!tsl2x7x_device_id(&device_id, id->driver_data)) || + (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) { + dev_info(&chip->client->dev, + "%s: i2c device found does not match expected id\n", + __func__); + goto fail1; + } + + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n", + __func__, ret); + goto fail1; + } + + /* ALS and PROX functions can be invoked via user space poll + * or H/W interrupt. If busy return last sample. */ + mutex_init(&chip->als_mutex); + mutex_init(&chip->prox_mutex); + + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN; + chip->pdata = clientp->dev.platform_data; + chip->id = id->driver_data; + chip->chip_info = + &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]]; + + indio_dev->info = chip->chip_info->info; + indio_dev->dev.parent = &clientp->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->name = chip->client->name; + indio_dev->channels = chip->chip_info->channel; + indio_dev->num_channels = chip->chip_info->chan_table_elements; + + if (clientp->irq) { + ret = request_threaded_irq(clientp->irq, + NULL, + &tsl2x7x_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "TSL2X7X_event", + indio_dev); + if (ret) { + dev_err(&clientp->dev, + "%s: irq request failed", __func__); + goto fail2; + } + } + + /* Load up the defaults */ + tsl2x7x_defaults(chip); + /* Make sure the chip is on */ + tsl2x7x_chip_on(indio_dev); + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&clientp->dev, + "%s: iio registration failed\n", __func__); + goto fail1; + } + + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name); + + return 0; + +fail1: + if (clientp->irq) + free_irq(clientp->irq, indio_dev); +fail2: + iio_free_device(indio_dev); + + return ret; +} + +static int tsl2x7x_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret = 0; + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) { + ret = tsl2x7x_chip_off(indio_dev); + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED; + } + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm = {PM_EVENT_SUSPEND}; + chip->pdata->platform_power(dev, pmm); + } + + return ret; +} + +static int tsl2x7x_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret = 0; + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm = {PM_EVENT_RESUME}; + chip->pdata->platform_power(dev, pmm); + } + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED) + ret = tsl2x7x_chip_on(indio_dev); + + return ret; +} + +static int __devexit tsl2x7x_remove(struct i2c_client *client) +{ + struct tsl2X7X_chip *chip = i2c_get_clientdata(client); + struct iio_dev *indio_dev = iio_priv_to_dev(chip); + + tsl2x7x_chip_off(indio_dev); + + iio_device_unregister(indio_dev); + if (client->irq) + free_irq(client->irq, chip->client->name); + + iio_free_device(indio_dev); + + return 0; +} + +static struct i2c_device_id tsl2x7x_idtable[] = { + { "tsl2571", tsl2571 }, + { "tsl2671", tsl2671 }, + { "tmd2671", tmd2671 }, + { "tsl2771", tsl2771 }, + { "tmd2771", tmd2771 }, + { "tsl2572", tsl2572 }, + { "tsl2672", tsl2672 }, + { "tmd2672", tmd2672 }, + { "tsl2772", tsl2772 }, + { "tmd2772", tmd2772 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable); + +static const struct dev_pm_ops tsl2x7x_pm_ops = { + .suspend = tsl2x7x_suspend, + .resume = tsl2x7x_resume, +}; + +/* Driver definition */ +static struct i2c_driver tsl2x7x_driver = { + .driver = { + .name = "tsl2x7x", + .pm = &tsl2x7x_pm_ops, + }, + .id_table = tsl2x7x_idtable, + .probe = tsl2x7x_probe, + .remove = __devexit_p(tsl2x7x_remove), +}; + +module_i2c_driver(tsl2x7x_driver); + +MODULE_AUTHOR("J. August Brenner"); +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver"); +MODULE_LICENSE("GPL");