diff options
Diffstat (limited to 'kernel/drivers/staging/iio/light')
| -rw-r--r-- | kernel/drivers/staging/iio/light/Kconfig | 43 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/Makefile | 8 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/isl29018.c | 815 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/isl29028.c | 562 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/tsl2583.c | 949 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/tsl2x7x.h | 100 | ||||
| -rw-r--r-- | kernel/drivers/staging/iio/light/tsl2x7x_core.c | 2030 |
7 files changed, 4507 insertions, 0 deletions
diff --git a/kernel/drivers/staging/iio/light/Kconfig b/kernel/drivers/staging/iio/light/Kconfig new file mode 100644 index 000000000..ca8d6e66c --- /dev/null +++ b/kernel/drivers/staging/iio/light/Kconfig @@ -0,0 +1,43 @@ +# +# Light sensors +# +menu "Light sensors" + +config SENSORS_ISL29018 + tristate "ISL 29018 light and proximity sensor" + depends on I2C + select REGMAP_I2C + default n + help + If you say yes here you get support for ambient light sensing and + proximity infrared sensing from Intersil ISL29018. + This driver will provide the measurements of ambient light intensity + in lux, proximity infrared sensing and normal infrared sensing. + Data from sensor is accessible via sysfs. + +config SENSORS_ISL29028 + tristate "Intersil ISL29028 Concurrent Light and Proximity Sensor" + depends on I2C + select REGMAP_I2C + help + Provides driver for the Intersil's ISL29028 device. + This driver supports the sysfs interface to get the ALS, IR intensity, + Proximity value via iio. The ISL29028 provides the concurrent sensing + of ambient light and proximity. + +config TSL2583 + tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters" + depends on I2C + help + 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/kernel/drivers/staging/iio/light/Makefile b/kernel/drivers/staging/iio/light/Makefile new file mode 100644 index 000000000..9960fdf7c --- /dev/null +++ b/kernel/drivers/staging/iio/light/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for industrial I/O Light sensors +# + +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/kernel/drivers/staging/iio/light/isl29018.c b/kernel/drivers/staging/iio/light/isl29018.c new file mode 100644 index 000000000..a3489187a --- /dev/null +++ b/kernel/drivers/staging/iio/light/isl29018.c @@ -0,0 +1,815 @@ +/* + * A iio driver for the light sensor ISL 29018/29023/29035. + * + * IIO driver for monitoring ambient light intensity in luxi, proximity + * sensing and infrared sensing. + * + * Copyright (c) 2010, NVIDIA 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 <linux/module.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/acpi.h> + +#define CONVERSION_TIME_MS 100 + +#define ISL29018_REG_ADD_COMMAND1 0x00 +#define COMMMAND1_OPMODE_SHIFT 5 +#define COMMMAND1_OPMODE_MASK (7 << COMMMAND1_OPMODE_SHIFT) +#define COMMMAND1_OPMODE_POWER_DOWN 0 +#define COMMMAND1_OPMODE_ALS_ONCE 1 +#define COMMMAND1_OPMODE_IR_ONCE 2 +#define COMMMAND1_OPMODE_PROX_ONCE 3 + +#define ISL29018_REG_ADD_COMMANDII 0x01 +#define COMMANDII_RESOLUTION_SHIFT 2 +#define COMMANDII_RESOLUTION_MASK (0x3 << COMMANDII_RESOLUTION_SHIFT) + +#define COMMANDII_RANGE_SHIFT 0 +#define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT) + +#define COMMANDII_SCHEME_SHIFT 7 +#define COMMANDII_SCHEME_MASK (0x1 << COMMANDII_SCHEME_SHIFT) + +#define ISL29018_REG_ADD_DATA_LSB 0x02 +#define ISL29018_REG_ADD_DATA_MSB 0x03 + +#define ISL29018_REG_TEST 0x08 +#define ISL29018_TEST_SHIFT 0 +#define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT) + +#define ISL29035_REG_DEVICE_ID 0x0F +#define ISL29035_DEVICE_ID_SHIFT 0x03 +#define ISL29035_DEVICE_ID_MASK (0x7 << ISL29035_DEVICE_ID_SHIFT) +#define ISL29035_DEVICE_ID 0x5 +#define ISL29035_BOUT_SHIFT 0x07 +#define ISL29035_BOUT_MASK (0x01 << ISL29035_BOUT_SHIFT) + +struct isl29018_chip { + struct device *dev; + struct regmap *regmap; + struct mutex lock; + int type; + unsigned int lux_scale; + unsigned int lux_uscale; + unsigned int range; + unsigned int adc_bit; + int prox_scheme; + bool suspended; +}; + +static int isl29018_set_range(struct isl29018_chip *chip, unsigned long range, + unsigned int *new_range) +{ + static const unsigned long supp_ranges[] = {1000, 4000, 16000, 64000}; + int i; + + for (i = 0; i < ARRAY_SIZE(supp_ranges); ++i) { + if (range <= supp_ranges[i]) { + *new_range = (unsigned int)supp_ranges[i]; + break; + } + } + + if (i >= ARRAY_SIZE(supp_ranges)) + return -EINVAL; + + return regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMANDII, + COMMANDII_RANGE_MASK, i << COMMANDII_RANGE_SHIFT); +} + +static int isl29018_set_resolution(struct isl29018_chip *chip, + unsigned long adcbit, unsigned int *conf_adc_bit) +{ + static const unsigned long supp_adcbit[] = {16, 12, 8, 4}; + int i; + + for (i = 0; i < ARRAY_SIZE(supp_adcbit); ++i) { + if (adcbit >= supp_adcbit[i]) { + *conf_adc_bit = (unsigned int)supp_adcbit[i]; + break; + } + } + + if (i >= ARRAY_SIZE(supp_adcbit)) + return -EINVAL; + + return regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMANDII, + COMMANDII_RESOLUTION_MASK, + i << COMMANDII_RESOLUTION_SHIFT); +} + +static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode) +{ + int status; + unsigned int lsb; + unsigned int msb; + + /* Set mode */ + status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, + mode << COMMMAND1_OPMODE_SHIFT); + if (status) { + dev_err(chip->dev, + "Error in setting operating mode err %d\n", status); + return status; + } + msleep(CONVERSION_TIME_MS); + status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb); + if (status < 0) { + dev_err(chip->dev, + "Error in reading LSB DATA with err %d\n", status); + return status; + } + + status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb); + if (status < 0) { + dev_err(chip->dev, + "Error in reading MSB DATA with error %d\n", status); + return status; + } + dev_vdbg(chip->dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb); + + return (msb << 8) | lsb; +} + +static int isl29018_read_lux(struct isl29018_chip *chip, int *lux) +{ + int lux_data; + unsigned int data_x_range, lux_unshifted; + + lux_data = isl29018_read_sensor_input(chip, COMMMAND1_OPMODE_ALS_ONCE); + + if (lux_data < 0) + return lux_data; + + /* To support fractional scaling, separate the unshifted lux + * into two calculations: int scaling and micro-scaling. + * lux_uscale ranges from 0-999999, so about 20 bits. Split + * the /1,000,000 in two to reduce the risk of over/underflow. + */ + data_x_range = lux_data * chip->range; + lux_unshifted = data_x_range * chip->lux_scale; + lux_unshifted += data_x_range / 1000 * chip->lux_uscale / 1000; + *lux = lux_unshifted >> chip->adc_bit; + + return 0; +} + +static int isl29018_read_ir(struct isl29018_chip *chip, int *ir) +{ + int ir_data; + + ir_data = isl29018_read_sensor_input(chip, COMMMAND1_OPMODE_IR_ONCE); + + if (ir_data < 0) + return ir_data; + + *ir = ir_data; + + return 0; +} + +static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme, + int *near_ir) +{ + int status; + int prox_data = -1; + int ir_data = -1; + + /* Do proximity sensing with required scheme */ + status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMANDII, + COMMANDII_SCHEME_MASK, + scheme << COMMANDII_SCHEME_SHIFT); + if (status) { + dev_err(chip->dev, "Error in setting operating mode\n"); + return status; + } + + prox_data = isl29018_read_sensor_input(chip, + COMMMAND1_OPMODE_PROX_ONCE); + if (prox_data < 0) + return prox_data; + + if (scheme == 1) { + *near_ir = prox_data; + return 0; + } + + ir_data = isl29018_read_sensor_input(chip, COMMMAND1_OPMODE_IR_ONCE); + + if (ir_data < 0) + return ir_data; + + if (prox_data >= ir_data) + *near_ir = prox_data - ir_data; + else + *near_ir = 0; + + return 0; +} + +/* Sysfs interface */ +/* range */ +static ssize_t show_range(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%u\n", chip->range); +} + +static ssize_t store_range(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + int status; + unsigned long lval; + unsigned int new_range; + + if (kstrtoul(buf, 10, &lval)) + return -EINVAL; + + if (!(lval == 1000UL || lval == 4000UL || + lval == 16000UL || lval == 64000UL)) { + dev_err(dev, "The range is not supported\n"); + return -EINVAL; + } + + mutex_lock(&chip->lock); + status = isl29018_set_range(chip, lval, &new_range); + if (status < 0) { + mutex_unlock(&chip->lock); + dev_err(dev, + "Error in setting max range with err %d\n", status); + return status; + } + chip->range = new_range; + mutex_unlock(&chip->lock); + + return count; +} + +/* resolution */ +static ssize_t show_resolution(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%u\n", chip->adc_bit); +} + +static ssize_t store_resolution(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + int status; + unsigned int val; + unsigned int new_adc_bit; + + if (kstrtouint(buf, 10, &val)) + return -EINVAL; + if (!(val == 4 || val == 8 || val == 12 || val == 16)) { + dev_err(dev, "The resolution is not supported\n"); + return -EINVAL; + } + + mutex_lock(&chip->lock); + status = isl29018_set_resolution(chip, val, &new_adc_bit); + if (status < 0) { + mutex_unlock(&chip->lock); + dev_err(dev, "Error in setting resolution\n"); + return status; + } + chip->adc_bit = new_adc_bit; + mutex_unlock(&chip->lock); + + return count; +} + +/* proximity scheme */ +static ssize_t show_prox_infrared_suppression(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + + /* return the "proximity scheme" i.e. if the chip does on chip + infrared suppression (1 means perform on chip suppression) */ + return sprintf(buf, "%d\n", chip->prox_scheme); +} + +static ssize_t store_prox_infrared_suppression(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct isl29018_chip *chip = iio_priv(indio_dev); + int val; + + if (kstrtoint(buf, 10, &val)) + return -EINVAL; + if (!(val == 0 || val == 1)) { + dev_err(dev, "The mode is not supported\n"); + return -EINVAL; + } + + /* get the "proximity scheme" i.e. if the chip does on chip + infrared suppression (1 means perform on chip suppression) */ + mutex_lock(&chip->lock); + chip->prox_scheme = val; + mutex_unlock(&chip->lock); + + return count; +} + +/* Channel IO */ +static int isl29018_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct isl29018_chip *chip = iio_priv(indio_dev); + int ret = -EINVAL; + + mutex_lock(&chip->lock); + if (mask == IIO_CHAN_INFO_CALIBSCALE && chan->type == IIO_LIGHT) { + chip->lux_scale = val; + /* With no write_raw_get_fmt(), val2 is a MICRO fraction. */ + chip->lux_uscale = val2; + ret = 0; + } + mutex_unlock(&chip->lock); + + return ret; +} + +static int isl29018_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + int ret = -EINVAL; + struct isl29018_chip *chip = iio_priv(indio_dev); + + mutex_lock(&chip->lock); + if (chip->suspended) { + mutex_unlock(&chip->lock); + return -EBUSY; + } + switch (mask) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_LIGHT: + ret = isl29018_read_lux(chip, val); + break; + case IIO_INTENSITY: + ret = isl29018_read_ir(chip, val); + break; + case IIO_PROXIMITY: + ret = isl29018_read_proximity_ir(chip, + chip->prox_scheme, val); + break; + default: + break; + } + if (!ret) + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type == IIO_LIGHT) { + *val = chip->lux_scale; + *val2 = chip->lux_uscale; + ret = IIO_VAL_INT_PLUS_MICRO; + } + break; + default: + break; + } + mutex_unlock(&chip->lock); + return ret; +} + +#define ISL29018_LIGHT_CHANNEL { \ + .type = IIO_LIGHT, \ + .indexed = 1, \ + .channel = 0, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | \ + BIT(IIO_CHAN_INFO_CALIBSCALE), \ +} + +#define ISL29018_IR_CHANNEL { \ + .type = IIO_INTENSITY, \ + .modified = 1, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .channel2 = IIO_MOD_LIGHT_IR, \ +} + +#define ISL29018_PROXIMITY_CHANNEL { \ + .type = IIO_PROXIMITY, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ +} + +static const struct iio_chan_spec isl29018_channels[] = { + ISL29018_LIGHT_CHANNEL, + ISL29018_IR_CHANNEL, + ISL29018_PROXIMITY_CHANNEL, +}; + +static const struct iio_chan_spec isl29023_channels[] = { + ISL29018_LIGHT_CHANNEL, + ISL29018_IR_CHANNEL, +}; + +static IIO_DEVICE_ATTR(range, S_IRUGO | S_IWUSR, show_range, store_range, 0); +static IIO_CONST_ATTR(range_available, "1000 4000 16000 64000"); +static IIO_CONST_ATTR(adc_resolution_available, "4 8 12 16"); +static IIO_DEVICE_ATTR(adc_resolution, S_IRUGO | S_IWUSR, + show_resolution, store_resolution, 0); +static IIO_DEVICE_ATTR(proximity_on_chip_ambient_infrared_suppression, + S_IRUGO | S_IWUSR, + show_prox_infrared_suppression, + store_prox_infrared_suppression, 0); + +#define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr) +#define ISL29018_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr) +static struct attribute *isl29018_attributes[] = { + ISL29018_DEV_ATTR(range), + ISL29018_CONST_ATTR(range_available), + ISL29018_DEV_ATTR(adc_resolution), + ISL29018_CONST_ATTR(adc_resolution_available), + ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_suppression), + NULL +}; + +static struct attribute *isl29023_attributes[] = { + ISL29018_DEV_ATTR(range), + ISL29018_CONST_ATTR(range_available), + ISL29018_DEV_ATTR(adc_resolution), + ISL29018_CONST_ATTR(adc_resolution_available), + NULL +}; + +static const struct attribute_group isl29018_group = { + .attrs = isl29018_attributes, +}; + +static const struct attribute_group isl29023_group = { + .attrs = isl29023_attributes, +}; + +static int isl29035_detect(struct isl29018_chip *chip) +{ + int status; + unsigned int id; + + status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id); + if (status < 0) { + dev_err(chip->dev, + "Error reading ID register with error %d\n", + status); + return status; + } + + id = (id & ISL29035_DEVICE_ID_MASK) >> ISL29035_DEVICE_ID_SHIFT; + + if (id != ISL29035_DEVICE_ID) + return -ENODEV; + + /* clear out brownout bit */ + return regmap_update_bits(chip->regmap, ISL29035_REG_DEVICE_ID, + ISL29035_BOUT_MASK, 0); +} + +enum { + isl29018, + isl29023, + isl29035, +}; + +static int isl29018_chip_init(struct isl29018_chip *chip) +{ + int status; + unsigned int new_adc_bit; + unsigned int new_range; + + if (chip->type == isl29035) { + status = isl29035_detect(chip); + if (status < 0) + return status; + } + + /* Code added per Intersil Application Note 1534: + * When VDD sinks to approximately 1.8V or below, some of + * the part's registers may change their state. When VDD + * recovers to 2.25V (or greater), the part may thus be in an + * unknown mode of operation. The user can return the part to + * a known mode of operation either by (a) setting VDD = 0V for + * 1 second or more and then powering back up with a slew rate + * of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX + * conversions, clear the test registers, and then rewrite all + * registers to the desired values. + * ... + * FOR ISL29011, ISL29018, ISL29021, ISL29023 + * 1. Write 0x00 to register 0x08 (TEST) + * 2. Write 0x00 to register 0x00 (CMD1) + * 3. Rewrite all registers to the desired values + * + * ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says + * the same thing EXCEPT the data sheet asks for a 1ms delay after + * writing the CMD1 register. + */ + status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0); + if (status < 0) { + dev_err(chip->dev, "Failed to clear isl29018 TEST reg.(%d)\n", + status); + return status; + } + + /* See Intersil AN1534 comments above. + * "Operating Mode" (COMMAND1) register is reprogrammed when + * data is read from the device. + */ + status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0); + if (status < 0) { + dev_err(chip->dev, "Failed to clear isl29018 CMD1 reg.(%d)\n", + status); + return status; + } + + usleep_range(1000, 2000); /* per data sheet, page 10 */ + + /* set defaults */ + status = isl29018_set_range(chip, chip->range, &new_range); + if (status < 0) { + dev_err(chip->dev, "Init of isl29018 fails\n"); + return status; + } + + status = isl29018_set_resolution(chip, chip->adc_bit, + &new_adc_bit); + + return 0; +} + +static const struct iio_info isl29018_info = { + .attrs = &isl29018_group, + .driver_module = THIS_MODULE, + .read_raw = &isl29018_read_raw, + .write_raw = &isl29018_write_raw, +}; + +static const struct iio_info isl29023_info = { + .attrs = &isl29023_group, + .driver_module = THIS_MODULE, + .read_raw = &isl29018_read_raw, + .write_raw = &isl29018_write_raw, +}; + +static bool is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ISL29018_REG_ADD_DATA_LSB: + case ISL29018_REG_ADD_DATA_MSB: + case ISL29018_REG_ADD_COMMAND1: + case ISL29018_REG_TEST: + case ISL29035_REG_DEVICE_ID: + return true; + default: + return false; + } +} + +/* + * isl29018_regmap_config: regmap configuration. + * Use RBTREE mechanism for caching. + */ +static const struct regmap_config isl29018_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = is_volatile_reg, + .max_register = ISL29018_REG_TEST, + .num_reg_defaults_raw = ISL29018_REG_TEST + 1, + .cache_type = REGCACHE_RBTREE, +}; + +/* isl29035_regmap_config: regmap configuration for ISL29035 */ +static const struct regmap_config isl29035_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = is_volatile_reg, + .max_register = ISL29035_REG_DEVICE_ID, + .num_reg_defaults_raw = ISL29035_REG_DEVICE_ID + 1, + .cache_type = REGCACHE_RBTREE, +}; + +struct chip_info { + const struct iio_chan_spec *channels; + int num_channels; + const struct iio_info *indio_info; + const struct regmap_config *regmap_cfg; +}; + +static const struct chip_info chip_info_tbl[] = { + [isl29018] = { + .channels = isl29018_channels, + .num_channels = ARRAY_SIZE(isl29018_channels), + .indio_info = &isl29018_info, + .regmap_cfg = &isl29018_regmap_config, + }, + [isl29023] = { + .channels = isl29023_channels, + .num_channels = ARRAY_SIZE(isl29023_channels), + .indio_info = &isl29023_info, + .regmap_cfg = &isl29018_regmap_config, + }, + [isl29035] = { + .channels = isl29023_channels, + .num_channels = ARRAY_SIZE(isl29023_channels), + .indio_info = &isl29023_info, + .regmap_cfg = &isl29035_regmap_config, + }, +}; + +static const char *isl29018_match_acpi_device(struct device *dev, int *data) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + + if (!id) + return NULL; + + *data = (int) id->driver_data; + + return dev_name(dev); +} + +static int isl29018_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct isl29018_chip *chip; + struct iio_dev *indio_dev; + int err; + const char *name = NULL; + int dev_id = 0; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + if (indio_dev == NULL) { + dev_err(&client->dev, "iio allocation fails\n"); + return -ENOMEM; + } + chip = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + chip->dev = &client->dev; + + if (id) { + name = id->name; + dev_id = id->driver_data; + } + + if (ACPI_HANDLE(&client->dev)) + name = isl29018_match_acpi_device(&client->dev, &dev_id); + + mutex_init(&chip->lock); + + chip->type = dev_id; + chip->lux_scale = 1; + chip->lux_uscale = 0; + chip->range = 1000; + chip->adc_bit = 16; + chip->suspended = false; + + chip->regmap = devm_regmap_init_i2c(client, + chip_info_tbl[dev_id].regmap_cfg); + if (IS_ERR(chip->regmap)) { + err = PTR_ERR(chip->regmap); + dev_err(chip->dev, "regmap initialization failed: %d\n", err); + return err; + } + + err = isl29018_chip_init(chip); + if (err) + return err; + + indio_dev->info = chip_info_tbl[dev_id].indio_info; + indio_dev->channels = chip_info_tbl[dev_id].channels; + indio_dev->num_channels = chip_info_tbl[dev_id].num_channels; + indio_dev->name = name; + indio_dev->dev.parent = &client->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + err = devm_iio_device_register(&client->dev, indio_dev); + if (err) { + dev_err(&client->dev, "iio registration fails\n"); + return err; + } + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int isl29018_suspend(struct device *dev) +{ + struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev)); + + mutex_lock(&chip->lock); + + /* Since this driver uses only polling commands, we are by default in + * auto shutdown (ie, power-down) mode. + * So we do not have much to do here. + */ + chip->suspended = true; + + mutex_unlock(&chip->lock); + return 0; +} + +static int isl29018_resume(struct device *dev) +{ + struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev)); + int err; + + mutex_lock(&chip->lock); + + err = isl29018_chip_init(chip); + if (!err) + chip->suspended = false; + + mutex_unlock(&chip->lock); + return err; +} + +static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume); +#define ISL29018_PM_OPS (&isl29018_pm_ops) +#else +#define ISL29018_PM_OPS NULL +#endif + +static const struct acpi_device_id isl29018_acpi_match[] = { + {"ISL29018", isl29018}, + {"ISL29023", isl29023}, + {"ISL29035", isl29035}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match); + +static const struct i2c_device_id isl29018_id[] = { + {"isl29018", isl29018}, + {"isl29023", isl29023}, + {"isl29035", isl29035}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, isl29018_id); + +static const struct of_device_id isl29018_of_match[] = { + { .compatible = "isil,isl29018", }, + { .compatible = "isil,isl29023", }, + { .compatible = "isil,isl29035", }, + { }, +}; +MODULE_DEVICE_TABLE(of, isl29018_of_match); + +static struct i2c_driver isl29018_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "isl29018", + .acpi_match_table = ACPI_PTR(isl29018_acpi_match), + .pm = ISL29018_PM_OPS, + .owner = THIS_MODULE, + .of_match_table = isl29018_of_match, + }, + .probe = isl29018_probe, + .id_table = isl29018_id, +}; +module_i2c_driver(isl29018_driver); + +MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/kernel/drivers/staging/iio/light/isl29028.c b/kernel/drivers/staging/iio/light/isl29028.c new file mode 100644 index 000000000..e5b2fdc23 --- /dev/null +++ b/kernel/drivers/staging/iio/light/isl29028.c @@ -0,0 +1,562 @@ +/* + * IIO driver for the light sensor ISL29028. + * ISL29028 is Concurrent Ambient Light and Proximity Sensor + * + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define CONVERSION_TIME_MS 100 + +#define ISL29028_REG_CONFIGURE 0x01 + +#define CONFIGURE_ALS_IR_MODE_ALS 0 +#define CONFIGURE_ALS_IR_MODE_IR BIT(0) +#define CONFIGURE_ALS_IR_MODE_MASK BIT(0) + +#define CONFIGURE_ALS_RANGE_LOW_LUX 0 +#define CONFIGURE_ALS_RANGE_HIGH_LUX BIT(1) +#define CONFIGURE_ALS_RANGE_MASK BIT(1) + +#define CONFIGURE_ALS_DIS 0 +#define CONFIGURE_ALS_EN BIT(2) +#define CONFIGURE_ALS_EN_MASK BIT(2) + +#define CONFIGURE_PROX_DRIVE BIT(3) + +#define CONFIGURE_PROX_SLP_SH 4 +#define CONFIGURE_PROX_SLP_MASK (7 << CONFIGURE_PROX_SLP_SH) + +#define CONFIGURE_PROX_EN BIT(7) +#define CONFIGURE_PROX_EN_MASK BIT(7) + +#define ISL29028_REG_INTERRUPT 0x02 + +#define ISL29028_REG_PROX_DATA 0x08 +#define ISL29028_REG_ALSIR_L 0x09 +#define ISL29028_REG_ALSIR_U 0x0A + +#define ISL29028_REG_TEST1_MODE 0x0E +#define ISL29028_REG_TEST2_MODE 0x0F + +#define ISL29028_NUM_REGS (ISL29028_REG_TEST2_MODE + 1) + +enum als_ir_mode { + MODE_NONE = 0, + MODE_ALS, + MODE_IR +}; + +struct isl29028_chip { + struct device *dev; + struct mutex lock; + struct regmap *regmap; + + unsigned int prox_sampling; + bool enable_prox; + + int lux_scale; + int als_ir_mode; +}; + +static int isl29028_set_proxim_sampling(struct isl29028_chip *chip, + unsigned int sampling) +{ + static unsigned int prox_period[] = {800, 400, 200, 100, 75, 50, 12, 0}; + int sel; + unsigned int period = DIV_ROUND_UP(1000, sampling); + + for (sel = 0; sel < ARRAY_SIZE(prox_period); ++sel) { + if (period >= prox_period[sel]) + break; + } + return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_PROX_SLP_MASK, sel << CONFIGURE_PROX_SLP_SH); +} + +static int isl29028_enable_proximity(struct isl29028_chip *chip, bool enable) +{ + int ret; + int val = 0; + + if (enable) + val = CONFIGURE_PROX_EN; + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_PROX_EN_MASK, val); + if (ret < 0) + return ret; + + /* Wait for conversion to be complete for first sample */ + mdelay(DIV_ROUND_UP(1000, chip->prox_sampling)); + return 0; +} + +static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale) +{ + int val = (lux_scale == 2000) ? CONFIGURE_ALS_RANGE_HIGH_LUX : + CONFIGURE_ALS_RANGE_LOW_LUX; + + return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_RANGE_MASK, val); +} + +static int isl29028_set_als_ir_mode(struct isl29028_chip *chip, + enum als_ir_mode mode) +{ + int ret = 0; + + switch (mode) { + case MODE_ALS: + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_IR_MODE_MASK, CONFIGURE_ALS_IR_MODE_ALS); + if (ret < 0) + return ret; + + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_RANGE_MASK, CONFIGURE_ALS_RANGE_HIGH_LUX); + break; + + case MODE_IR: + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_IR_MODE_MASK, CONFIGURE_ALS_IR_MODE_IR); + break; + + case MODE_NONE: + return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_EN_MASK, CONFIGURE_ALS_DIS); + } + + if (ret < 0) + return ret; + + /* Enable the ALS/IR */ + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + CONFIGURE_ALS_EN_MASK, CONFIGURE_ALS_EN); + if (ret < 0) + return ret; + + /* Need to wait for conversion time if ALS/IR mode enabled */ + mdelay(CONVERSION_TIME_MS); + return 0; +} + +static int isl29028_read_als_ir(struct isl29028_chip *chip, int *als_ir) +{ + unsigned int lsb; + unsigned int msb; + int ret; + + ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_L, &lsb); + if (ret < 0) { + dev_err(chip->dev, + "Error in reading register ALSIR_L err %d\n", ret); + return ret; + } + + ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_U, &msb); + if (ret < 0) { + dev_err(chip->dev, + "Error in reading register ALSIR_U err %d\n", ret); + return ret; + } + + *als_ir = ((msb & 0xF) << 8) | (lsb & 0xFF); + return 0; +} + +static int isl29028_read_proxim(struct isl29028_chip *chip, int *prox) +{ + unsigned int data; + int ret; + + ret = regmap_read(chip->regmap, ISL29028_REG_PROX_DATA, &data); + if (ret < 0) { + dev_err(chip->dev, "Error in reading register %d, error %d\n", + ISL29028_REG_PROX_DATA, ret); + return ret; + } + *prox = data; + return 0; +} + +static int isl29028_proxim_get(struct isl29028_chip *chip, int *prox_data) +{ + int ret; + + if (!chip->enable_prox) { + ret = isl29028_enable_proximity(chip, true); + if (ret < 0) + return ret; + chip->enable_prox = true; + } + return isl29028_read_proxim(chip, prox_data); +} + +static int isl29028_als_get(struct isl29028_chip *chip, int *als_data) +{ + int ret; + int als_ir_data; + + if (chip->als_ir_mode != MODE_ALS) { + ret = isl29028_set_als_ir_mode(chip, MODE_ALS); + if (ret < 0) { + dev_err(chip->dev, + "Error in enabling ALS mode err %d\n", ret); + return ret; + } + chip->als_ir_mode = MODE_ALS; + } + + ret = isl29028_read_als_ir(chip, &als_ir_data); + if (ret < 0) + return ret; + + /* + * convert als data count to lux. + * if lux_scale = 125, lux = count * 0.031 + * if lux_scale = 2000, lux = count * 0.49 + */ + if (chip->lux_scale == 125) + als_ir_data = (als_ir_data * 31) / 1000; + else + als_ir_data = (als_ir_data * 49) / 100; + + *als_data = als_ir_data; + return 0; +} + +static int isl29028_ir_get(struct isl29028_chip *chip, int *ir_data) +{ + int ret; + + if (chip->als_ir_mode != MODE_IR) { + ret = isl29028_set_als_ir_mode(chip, MODE_IR); + if (ret < 0) { + dev_err(chip->dev, + "Error in enabling IR mode err %d\n", ret); + return ret; + } + chip->als_ir_mode = MODE_IR; + } + return isl29028_read_als_ir(chip, ir_data); +} + +/* Channel IO */ +static int isl29028_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + struct isl29028_chip *chip = iio_priv(indio_dev); + int ret = -EINVAL; + + mutex_lock(&chip->lock); + switch (chan->type) { + case IIO_PROXIMITY: + if (mask != IIO_CHAN_INFO_SAMP_FREQ) { + dev_err(chip->dev, + "proximity: mask value 0x%08lx not supported\n", + mask); + break; + } + if (val < 1 || val > 100) { + dev_err(chip->dev, + "Samp_freq %d is not in range[1:100]\n", val); + break; + } + ret = isl29028_set_proxim_sampling(chip, val); + if (ret < 0) { + dev_err(chip->dev, + "Setting proximity samp_freq fail, err %d\n", + ret); + break; + } + chip->prox_sampling = val; + break; + + case IIO_LIGHT: + if (mask != IIO_CHAN_INFO_SCALE) { + dev_err(chip->dev, + "light: mask value 0x%08lx not supported\n", + mask); + break; + } + if ((val != 125) && (val != 2000)) { + dev_err(chip->dev, + "lux scale %d is invalid [125, 2000]\n", val); + break; + } + ret = isl29028_set_als_scale(chip, val); + if (ret < 0) { + dev_err(chip->dev, + "Setting lux scale fail with error %d\n", ret); + break; + } + chip->lux_scale = val; + break; + + default: + dev_err(chip->dev, "Unsupported channel type\n"); + break; + } + mutex_unlock(&chip->lock); + return ret; +} + +static int isl29028_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long mask) +{ + struct isl29028_chip *chip = iio_priv(indio_dev); + int ret = -EINVAL; + + mutex_lock(&chip->lock); + switch (mask) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_LIGHT: + ret = isl29028_als_get(chip, val); + break; + case IIO_INTENSITY: + ret = isl29028_ir_get(chip, val); + break; + case IIO_PROXIMITY: + ret = isl29028_proxim_get(chip, val); + break; + default: + break; + } + if (ret < 0) + break; + ret = IIO_VAL_INT; + break; + + case IIO_CHAN_INFO_SAMP_FREQ: + if (chan->type != IIO_PROXIMITY) + break; + *val = chip->prox_sampling; + ret = IIO_VAL_INT; + break; + + case IIO_CHAN_INFO_SCALE: + if (chan->type != IIO_LIGHT) + break; + *val = chip->lux_scale; + ret = IIO_VAL_INT; + break; + + default: + dev_err(chip->dev, "mask value 0x%08lx not supported\n", mask); + break; + } + mutex_unlock(&chip->lock); + return ret; +} + +static IIO_CONST_ATTR(in_proximity_sampling_frequency_available, + "1, 3, 5, 10, 13, 20, 83, 100"); +static IIO_CONST_ATTR(in_illuminance_scale_available, "125, 2000"); + +#define ISL29028_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr) +#define ISL29028_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr) +static struct attribute *isl29028_attributes[] = { + ISL29028_CONST_ATTR(in_proximity_sampling_frequency_available), + ISL29028_CONST_ATTR(in_illuminance_scale_available), + NULL, +}; + +static const struct attribute_group isl29108_group = { + .attrs = isl29028_attributes, +}; + +static const struct iio_chan_spec isl29028_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_SCALE), + }, { + .type = IIO_INTENSITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + }, { + .type = IIO_PROXIMITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + } +}; + +static const struct iio_info isl29028_info = { + .attrs = &isl29108_group, + .driver_module = THIS_MODULE, + .read_raw = &isl29028_read_raw, + .write_raw = &isl29028_write_raw, +}; + +static int isl29028_chip_init(struct isl29028_chip *chip) +{ + int ret; + + chip->enable_prox = false; + chip->prox_sampling = 20; + chip->lux_scale = 2000; + chip->als_ir_mode = MODE_NONE; + + ret = regmap_write(chip->regmap, ISL29028_REG_TEST1_MODE, 0x0); + if (ret < 0) { + dev_err(chip->dev, "%s(): write to reg %d failed, err = %d\n", + __func__, ISL29028_REG_TEST1_MODE, ret); + return ret; + } + ret = regmap_write(chip->regmap, ISL29028_REG_TEST2_MODE, 0x0); + if (ret < 0) { + dev_err(chip->dev, "%s(): write to reg %d failed, err = %d\n", + __func__, ISL29028_REG_TEST2_MODE, ret); + return ret; + } + + ret = regmap_write(chip->regmap, ISL29028_REG_CONFIGURE, 0x0); + if (ret < 0) { + dev_err(chip->dev, "%s(): write to reg %d failed, err = %d\n", + __func__, ISL29028_REG_CONFIGURE, ret); + return ret; + } + + ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling); + if (ret < 0) { + dev_err(chip->dev, "setting the proximity, err = %d\n", + ret); + return ret; + } + + ret = isl29028_set_als_scale(chip, chip->lux_scale); + if (ret < 0) + dev_err(chip->dev, + "setting als scale failed, err = %d\n", ret); + return ret; +} + +static bool is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ISL29028_REG_INTERRUPT: + case ISL29028_REG_PROX_DATA: + case ISL29028_REG_ALSIR_L: + case ISL29028_REG_ALSIR_U: + return true; + default: + return false; + } +} + +static const struct regmap_config isl29028_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = is_volatile_reg, + .max_register = ISL29028_NUM_REGS - 1, + .num_reg_defaults_raw = ISL29028_NUM_REGS, + .cache_type = REGCACHE_RBTREE, +}; + +static int isl29028_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct isl29028_chip *chip; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + if (!indio_dev) { + dev_err(&client->dev, "iio allocation fails\n"); + return -ENOMEM; + } + + chip = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + chip->dev = &client->dev; + mutex_init(&chip->lock); + + chip->regmap = devm_regmap_init_i2c(client, &isl29028_regmap_config); + if (IS_ERR(chip->regmap)) { + ret = PTR_ERR(chip->regmap); + dev_err(chip->dev, "regmap initialization failed: %d\n", ret); + return ret; + } + + ret = isl29028_chip_init(chip); + if (ret < 0) { + dev_err(chip->dev, "chip initialization failed: %d\n", ret); + return ret; + } + + indio_dev->info = &isl29028_info; + indio_dev->channels = isl29028_channels; + indio_dev->num_channels = ARRAY_SIZE(isl29028_channels); + indio_dev->name = id->name; + indio_dev->dev.parent = &client->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(chip->dev, "iio registration fails with error %d\n", + ret); + return ret; + } + return 0; +} + +static int isl29028_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + iio_device_unregister(indio_dev); + return 0; +} + +static const struct i2c_device_id isl29028_id[] = { + {"isl29028", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, isl29028_id); + +static const struct of_device_id isl29028_of_match[] = { + { .compatible = "isl,isl29028", }, /* for backward compat., don't use */ + { .compatible = "isil,isl29028", }, + { }, +}; +MODULE_DEVICE_TABLE(of, isl29028_of_match); + +static struct i2c_driver isl29028_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "isl29028", + .owner = THIS_MODULE, + .of_match_table = isl29028_of_match, + }, + .probe = isl29028_probe, + .remove = isl29028_remove, + .id_table = isl29028_id, +}; + +module_i2c_driver(isl29028_driver); + +MODULE_DESCRIPTION("ISL29028 Ambient Light and Proximity Sensor driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); diff --git a/kernel/drivers/staging/iio/light/tsl2583.c b/kernel/drivers/staging/iio/light/tsl2583.c new file mode 100644 index 000000000..b5e1b8b0a --- /dev/null +++ b/kernel/drivers/staging/iio/light/tsl2583.c @@ -0,0 +1,949 @@ +/* + * Device driver for monitoring ambient light intensity (lux) + * within the TAOS tsl258x family of devices (tsl2580, tsl2581). + * + * Copyright (c) 2011, 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 <linux/kernel.h> +#include <linux/i2c.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/mutex.h> +#include <linux/unistd.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/iio/iio.h> + +#define TSL258X_MAX_DEVICE_REGS 32 + +/* Triton register offsets */ +#define TSL258X_REG_MAX 8 + +/* Device Registers and Masks */ +#define TSL258X_CNTRL 0x00 +#define TSL258X_ALS_TIME 0X01 +#define TSL258X_INTERRUPT 0x02 +#define TSL258X_GAIN 0x07 +#define TSL258X_REVID 0x11 +#define TSL258X_CHIPID 0x12 +#define TSL258X_ALS_CHAN0LO 0x14 +#define TSL258X_ALS_CHAN0HI 0x15 +#define TSL258X_ALS_CHAN1LO 0x16 +#define TSL258X_ALS_CHAN1HI 0x17 +#define TSL258X_TMR_LO 0x18 +#define TSL258X_TMR_HI 0x19 + +/* tsl2583 cmd reg masks */ +#define TSL258X_CMD_REG 0x80 +#define TSL258X_CMD_SPL_FN 0x60 +#define TSL258X_CMD_ALS_INT_CLR 0X01 + +/* tsl2583 cntrl reg masks */ +#define TSL258X_CNTL_ADC_ENBL 0x02 +#define TSL258X_CNTL_PWR_ON 0x01 + +/* tsl2583 status reg masks */ +#define TSL258X_STA_ADC_VALID 0x01 +#define TSL258X_STA_ADC_INTR 0x10 + +/* Lux calculation constants */ +#define TSL258X_LUX_CALC_OVER_FLOW 65535 + +enum { + TSL258X_CHIP_UNKNOWN = 0, + TSL258X_CHIP_WORKING = 1, + TSL258X_CHIP_SUSPENDED = 2 +}; + +/* Per-device data */ +struct taos_als_info { + u16 als_ch0; + u16 als_ch1; + u16 lux; +}; + +struct taos_settings { + int als_time; + int als_gain; + int als_gain_trim; + int als_cal_target; +}; + +struct tsl2583_chip { + struct mutex als_mutex; + struct i2c_client *client; + struct taos_als_info als_cur_info; + struct taos_settings taos_settings; + int als_time_scale; + int als_saturation; + int taos_chip_status; + u8 taos_config[8]; +}; + +/* + * Initial values for device - this values can/will be changed by driver. + * and applications as needed. + * These values are dynamic. + */ +static const u8 taos_config[8] = { + 0x00, 0xee, 0x00, 0x03, 0x00, 0xFF, 0xFF, 0x00 +}; /* cntrl atime intC Athl0 Athl1 Athh0 Athh1 gain */ + +struct taos_lux { + unsigned int ratio; + unsigned int ch0; + unsigned int ch1; +}; + +/* This structure is intentionally large to accommodate updates via sysfs. */ +/* Sized to 11 = max 10 segments + 1 termination segment */ +/* Assumption is one and only one type of glass used */ +static struct taos_lux taos_device_lux[11] = { + { 9830, 8520, 15729 }, + { 12452, 10807, 23344 }, + { 14746, 6383, 11705 }, + { 17695, 4063, 6554 }, +}; + +struct gainadj { + s16 ch0; + s16 ch1; +}; + +/* Index = (0 - 3) Used to validate the gain selection index */ +static const struct gainadj gainadj[] = { + { 1, 1 }, + { 8, 8 }, + { 16, 16 }, + { 107, 115 } +}; + +/* + * Provides initial operational parameter defaults. + * These defaults may be changed through the device's sysfs files. + */ +static void taos_defaults(struct tsl2583_chip *chip) +{ + /* Operational parameters */ + chip->taos_settings.als_time = 100; + /* must be a multiple of 50mS */ + chip->taos_settings.als_gain = 0; + /* this is actually an index into the gain table */ + /* assume clear glass as default */ + chip->taos_settings.als_gain_trim = 1000; + /* default gain trim to account for aperture effects */ + chip->taos_settings.als_cal_target = 130; + /* Known external ALS reading used for calibration */ +} + +/* + * Read a number of bytes starting at register (reg) location. + * Return 0, or i2c_smbus_write_byte ERROR code. + */ +static int +taos_i2c_read(struct i2c_client *client, u8 reg, u8 *val, unsigned int len) +{ + int i, ret; + + for (i = 0; i < len; i++) { + /* select register to write */ + ret = i2c_smbus_write_byte(client, (TSL258X_CMD_REG | reg)); + if (ret < 0) { + dev_err(&client->dev, + "taos_i2c_read failed to write register %x\n", + reg); + return ret; + } + /* read the data */ + *val = i2c_smbus_read_byte(client); + val++; + reg++; + } + return 0; +} + +/* + * Reads and calculates current lux value. + * 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. The array taos_device_lux[] + * declared above 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 taos_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[5]; + struct taos_lux *p; + struct tsl2583_chip *chip = iio_priv(indio_dev); + int i, ret; + u32 ch0lux = 0; + u32 ch1lux = 0; + + if (mutex_trylock(&chip->als_mutex) == 0) { + dev_info(&chip->client->dev, "taos_get_lux device is busy\n"); + return chip->als_cur_info.lux; /* busy, so return LAST VALUE */ + } + + if (chip->taos_chip_status != TSL258X_CHIP_WORKING) { + /* device is not enabled */ + dev_err(&chip->client->dev, "taos_get_lux device is not enabled\n"); + ret = -EBUSY; + goto out_unlock; + } + + ret = taos_i2c_read(chip->client, (TSL258X_CMD_REG), &buf[0], 1); + if (ret < 0) { + dev_err(&chip->client->dev, "taos_get_lux failed to read CMD_REG\n"); + goto out_unlock; + } + /* is data new & valid */ + if (!(buf[0] & TSL258X_STA_ADC_INTR)) { + dev_err(&chip->client->dev, "taos_get_lux data not valid\n"); + ret = chip->als_cur_info.lux; /* return LAST VALUE */ + goto out_unlock; + } + + for (i = 0; i < 4; i++) { + int reg = TSL258X_CMD_REG | (TSL258X_ALS_CHAN0LO + i); + + ret = taos_i2c_read(chip->client, reg, &buf[i], 1); + if (ret < 0) { + dev_err(&chip->client->dev, + "taos_get_lux failed to read register %x\n", + reg); + goto out_unlock; + } + } + + /* clear status, really interrupt status (interrupts are off), but + * we use the bit anyway - don't forget 0x80 - this is a command*/ + ret = i2c_smbus_write_byte(chip->client, + (TSL258X_CMD_REG | TSL258X_CMD_SPL_FN | + TSL258X_CMD_ALS_INT_CLR)); + + if (ret < 0) { + dev_err(&chip->client->dev, + "taos_i2c_write_command failed in taos_get_lux, err = %d\n", + 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)) + goto return_max; + + if (ch0 == 0) { + /* have no data, so return LAST VALUE */ + ret = chip->als_cur_info.lux = 0; + goto out_unlock; + } + /* calculate ratio */ + ratio = (ch1 << 15) / ch0; + /* convert to unscaled lux using the pointer to the table */ + for (p = (struct taos_lux *) taos_device_lux; + p->ratio != 0 && p->ratio < ratio; p++) + ; + + if (p->ratio == 0) { + lux = 0; + } else { + ch0lux = ((ch0 * p->ch0) + + (gainadj[chip->taos_settings.als_gain].ch0 >> 1)) + / gainadj[chip->taos_settings.als_gain].ch0; + ch1lux = ((ch1 * p->ch1) + + (gainadj[chip->taos_settings.als_gain].ch1 >> 1)) + / gainadj[chip->taos_settings.als_gain].ch1; + lux = ch0lux - ch1lux; + } + + /* note: lux is 31 bit max at this point */ + if (ch1lux > ch0lux) { + dev_dbg(&chip->client->dev, "No Data - Return last value\n"); + ret = chip->als_cur_info.lux = 0; + 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 taos_device_lux tables above have a factor of 8192 built in, + * so we need to shift right. + * 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->taos_settings.als_gain_trim; + lux64 >>= 13; + lux = lux64; + lux = (lux + 500) / 1000; + if (lux > TSL258X_LUX_CALC_OVER_FLOW) { /* check for overflow */ +return_max: + lux = TSL258X_LUX_CALC_OVER_FLOW; + } + + /* Update the structure with the latest VALID lux. */ + chip->als_cur_info.lux = lux; + ret = lux; + +out_unlock: + mutex_unlock(&chip->als_mutex); + return ret; +} + +/* + * Obtain single reading and calculate the als_gain_trim (later used + * to derive actual lux). + * Return updated gain_trim value. + */ +static int taos_als_calibrate(struct iio_dev *indio_dev) +{ + struct tsl2583_chip *chip = iio_priv(indio_dev); + u8 reg_val; + unsigned int gain_trim_val; + int ret; + int lux_val; + + ret = i2c_smbus_write_byte(chip->client, + (TSL258X_CMD_REG | TSL258X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "taos_als_calibrate failed to reach the CNTRL register, ret=%d\n", + ret); + return ret; + } + + reg_val = i2c_smbus_read_byte(chip->client); + if ((reg_val & (TSL258X_CNTL_ADC_ENBL | TSL258X_CNTL_PWR_ON)) + != (TSL258X_CNTL_ADC_ENBL | TSL258X_CNTL_PWR_ON)) { + dev_err(&chip->client->dev, + "taos_als_calibrate failed: device not powered on with ADC enabled\n"); + return -1; + } + + ret = i2c_smbus_write_byte(chip->client, + (TSL258X_CMD_REG | TSL258X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "taos_als_calibrate failed to reach the STATUS register, ret=%d\n", + ret); + return ret; + } + reg_val = i2c_smbus_read_byte(chip->client); + + if ((reg_val & TSL258X_STA_ADC_VALID) != TSL258X_STA_ADC_VALID) { + dev_err(&chip->client->dev, + "taos_als_calibrate failed: STATUS - ADC not valid.\n"); + return -ENODATA; + } + lux_val = taos_get_lux(indio_dev); + if (lux_val < 0) { + dev_err(&chip->client->dev, "taos_als_calibrate failed to get lux\n"); + return lux_val; + } + gain_trim_val = (unsigned int) (((chip->taos_settings.als_cal_target) + * chip->taos_settings.als_gain_trim) / lux_val); + + if ((gain_trim_val < 250) || (gain_trim_val > 4000)) { + dev_err(&chip->client->dev, + "taos_als_calibrate failed: trim_val of %d is out of range\n", + gain_trim_val); + return -ENODATA; + } + chip->taos_settings.als_gain_trim = (int) gain_trim_val; + + return (int) gain_trim_val; +} + +/* + * Turn the device on. + * Configuration must be set before calling this function. + */ +static int taos_chip_on(struct iio_dev *indio_dev) +{ + int i; + int ret; + u8 *uP; + u8 utmp; + int als_count; + int als_time; + struct tsl2583_chip *chip = iio_priv(indio_dev); + + /* and make sure we're not already on */ + if (chip->taos_chip_status == TSL258X_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 register */ + als_count = (chip->taos_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->taos_config[TSL258X_ALS_TIME] = 256 - als_count; + + /* Set the gain based on taos_settings struct */ + chip->taos_config[TSL258X_GAIN] = chip->taos_settings.als_gain; + + /* 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; + + /* TSL258x Specific power-on / adc enable sequence + * Power on the device 1st. */ + utmp = TSL258X_CNTL_PWR_ON; + ret = i2c_smbus_write_byte_data(chip->client, + TSL258X_CMD_REG | TSL258X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, "taos_chip_on failed on CNTRL reg.\n"); + return ret; + } + + /* Use the following shadow copy for our delay before enabling ADC. + * Write all the registers. */ + for (i = 0, uP = chip->taos_config; i < TSL258X_REG_MAX; i++) { + ret = i2c_smbus_write_byte_data(chip->client, + TSL258X_CMD_REG + i, + *uP++); + if (ret < 0) { + dev_err(&chip->client->dev, + "taos_chip_on failed on reg %d.\n", i); + return ret; + } + } + + usleep_range(3000, 3500); + /* NOW enable the ADC + * initialize the desired mode of operation */ + utmp = TSL258X_CNTL_PWR_ON | TSL258X_CNTL_ADC_ENBL; + ret = i2c_smbus_write_byte_data(chip->client, + TSL258X_CMD_REG | TSL258X_CNTRL, + utmp); + if (ret < 0) { + dev_err(&chip->client->dev, "taos_chip_on failed on 2nd CTRL reg.\n"); + return ret; + } + chip->taos_chip_status = TSL258X_CHIP_WORKING; + + return ret; +} + +static int taos_chip_off(struct iio_dev *indio_dev) +{ + struct tsl2583_chip *chip = iio_priv(indio_dev); + + /* turn device off */ + chip->taos_chip_status = TSL258X_CHIP_SUSPENDED; + return i2c_smbus_write_byte_data(chip->client, + TSL258X_CMD_REG | TSL258X_CNTRL, + 0x00); +} + +/* Sysfs Interface Functions */ + +static ssize_t taos_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", chip->taos_chip_status); +} + +static ssize_t taos_power_state_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + if (value == 0) + taos_chip_off(indio_dev); + else + taos_chip_on(indio_dev); + + return len; +} + +static ssize_t taos_gain_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + char gain[4] = {0}; + + switch (chip->taos_settings.als_gain) { + case 0: + strcpy(gain, "001"); + break; + case 1: + strcpy(gain, "008"); + break; + case 2: + strcpy(gain, "016"); + break; + case 3: + strcpy(gain, "111"); + break; + } + + return sprintf(buf, "%s\n", gain); +} + +static ssize_t taos_gain_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + switch (value) { + case 1: + chip->taos_settings.als_gain = 0; + break; + case 8: + chip->taos_settings.als_gain = 1; + break; + case 16: + chip->taos_settings.als_gain = 2; + break; + case 111: + chip->taos_settings.als_gain = 3; + break; + default: + dev_err(dev, "Invalid Gain Index (must be 1,8,16,111)\n"); + return -1; + } + + return len; +} + +static ssize_t taos_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%s\n", "1 8 16 111"); +} + +static ssize_t taos_als_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", chip->taos_settings.als_time); +} + +static ssize_t taos_als_time_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + if ((value < 50) || (value > 650)) + return -EINVAL; + + if (value % 50) + return -EINVAL; + + chip->taos_settings.als_time = value; + + return len; +} + +static ssize_t taos_als_time_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%s\n", + "50 100 150 200 250 300 350 400 450 500 550 600 650"); +} + +static ssize_t taos_als_trim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", chip->taos_settings.als_gain_trim); +} + +static ssize_t taos_als_trim_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->taos_settings.als_gain_trim = value; + + return len; +} + +static ssize_t taos_als_cal_target_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", chip->taos_settings.als_cal_target); +} + +static ssize_t taos_als_cal_target_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->taos_settings.als_cal_target = value; + + return len; +} + +static ssize_t taos_lux_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int ret; + + ret = taos_get_lux(dev_to_iio_dev(dev)); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", ret); +} + +static ssize_t taos_do_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + int value; + + if (kstrtoint(buf, 0, &value)) + return -EINVAL; + + if (value == 1) + taos_als_calibrate(indio_dev); + + return len; +} + +static ssize_t taos_luxtable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int i; + int offset = 0; + + for (i = 0; i < ARRAY_SIZE(taos_device_lux); i++) { + offset += sprintf(buf + offset, "%u,%u,%u,", + taos_device_lux[i].ratio, + taos_device_lux[i].ch0, + taos_device_lux[i].ch1); + if (taos_device_lux[i].ratio == 0) { + /* We just printed the first "0" entry. + * Now get rid of the extra "," and break. */ + offset--; + break; + } + } + + offset += sprintf(buf + offset, "\n"); + return offset; +} + +static ssize_t taos_luxtable_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int value[ARRAY_SIZE(taos_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(taos_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->taos_chip_status == TSL258X_CHIP_WORKING) + taos_chip_off(indio_dev); + + /* Zero out the table */ + memset(taos_device_lux, 0, sizeof(taos_device_lux)); + memcpy(taos_device_lux, &value[1], (value[0] * 4)); + + taos_chip_on(indio_dev); + + return len; +} + +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, + taos_power_state_show, taos_power_state_store); + +static DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR, + taos_gain_show, taos_gain_store); +static DEVICE_ATTR(illuminance0_calibscale_available, S_IRUGO, + taos_gain_available_show, NULL); + +static DEVICE_ATTR(illuminance0_integration_time, S_IRUGO | S_IWUSR, + taos_als_time_show, taos_als_time_store); +static DEVICE_ATTR(illuminance0_integration_time_available, S_IRUGO, + taos_als_time_available_show, NULL); + +static DEVICE_ATTR(illuminance0_calibbias, S_IRUGO | S_IWUSR, + taos_als_trim_show, taos_als_trim_store); + +static DEVICE_ATTR(illuminance0_input_target, S_IRUGO | S_IWUSR, + taos_als_cal_target_show, taos_als_cal_target_store); + +static DEVICE_ATTR(illuminance0_input, S_IRUGO, taos_lux_show, NULL); +static DEVICE_ATTR(illuminance0_calibrate, S_IWUSR, NULL, taos_do_calibrate); +static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR, + taos_luxtable_show, taos_luxtable_store); + +static struct attribute *sysfs_attrs_ctrl[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale.attr, /* Gain */ + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, /* I time*/ + &dev_attr_illuminance0_integration_time_available.attr, + &dev_attr_illuminance0_calibbias.attr, /* trim */ + &dev_attr_illuminance0_input_target.attr, + &dev_attr_illuminance0_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + NULL +}; + +static struct attribute_group tsl2583_attribute_group = { + .attrs = sysfs_attrs_ctrl, +}; + +/* Use the default register values to identify the Taos device */ +static int taos_tsl258x_device(unsigned char *bufp) +{ + return ((bufp[TSL258X_CHIPID] & 0xf0) == 0x90); +} + +static const struct iio_info tsl2583_info = { + .attrs = &tsl2583_attribute_group, + .driver_module = THIS_MODULE, +}; + +/* + * Client probe function - When a valid device is found, the driver's device + * data structure is updated, and initialization completes successfully. + */ +static int taos_probe(struct i2c_client *clientp, + const struct i2c_device_id *idp) +{ + int i, ret; + unsigned char buf[TSL258X_MAX_DEVICE_REGS]; + struct tsl2583_chip *chip; + struct iio_dev *indio_dev; + + if (!i2c_check_functionality(clientp->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&clientp->dev, "taos_probe() - i2c smbus byte data func unsupported\n"); + return -EOPNOTSUPP; + } + + indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + chip = iio_priv(indio_dev); + chip->client = clientp; + i2c_set_clientdata(clientp, indio_dev); + + mutex_init(&chip->als_mutex); + chip->taos_chip_status = TSL258X_CHIP_UNKNOWN; + memcpy(chip->taos_config, taos_config, sizeof(chip->taos_config)); + + for (i = 0; i < TSL258X_MAX_DEVICE_REGS; i++) { + ret = i2c_smbus_write_byte(clientp, + (TSL258X_CMD_REG | (TSL258X_CNTRL + i))); + if (ret < 0) { + dev_err(&clientp->dev, + "i2c_smbus_write_byte to cmd reg failed in taos_probe(), err = %d\n", + ret); + return ret; + } + ret = i2c_smbus_read_byte(clientp); + if (ret < 0) { + dev_err(&clientp->dev, + "i2c_smbus_read_byte from reg failed in taos_probe(), err = %d\n", + ret); + return ret; + } + buf[i] = ret; + } + + if (!taos_tsl258x_device(buf)) { + dev_info(&clientp->dev, + "i2c device found but does not match expected id in taos_probe()\n"); + return -EINVAL; + } + + ret = i2c_smbus_write_byte(clientp, (TSL258X_CMD_REG | TSL258X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, + "i2c_smbus_write_byte() to cmd reg failed in taos_probe(), err = %d\n", + ret); + return ret; + } + + indio_dev->info = &tsl2583_info; + indio_dev->dev.parent = &clientp->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->name = chip->client->name; + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&clientp->dev, "iio registration failed\n"); + return ret; + } + + /* Load up the V2 defaults (these are hard coded defaults for now) */ + taos_defaults(chip); + + /* Make sure the chip is on */ + taos_chip_on(indio_dev); + + dev_info(&clientp->dev, "Light sensor found.\n"); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int taos_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int ret = 0; + + mutex_lock(&chip->als_mutex); + + if (chip->taos_chip_status == TSL258X_CHIP_WORKING) { + ret = taos_chip_off(indio_dev); + chip->taos_chip_status = TSL258X_CHIP_SUSPENDED; + } + + mutex_unlock(&chip->als_mutex); + return ret; +} + +static int taos_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct tsl2583_chip *chip = iio_priv(indio_dev); + int ret = 0; + + mutex_lock(&chip->als_mutex); + + if (chip->taos_chip_status == TSL258X_CHIP_SUSPENDED) + ret = taos_chip_on(indio_dev); + + mutex_unlock(&chip->als_mutex); + return ret; +} + +static SIMPLE_DEV_PM_OPS(taos_pm_ops, taos_suspend, taos_resume); +#define TAOS_PM_OPS (&taos_pm_ops) +#else +#define TAOS_PM_OPS NULL +#endif + +static int taos_remove(struct i2c_client *client) +{ + iio_device_unregister(i2c_get_clientdata(client)); + + return 0; +} + +static struct i2c_device_id taos_idtable[] = { + { "tsl2580", 0 }, + { "tsl2581", 1 }, + { "tsl2583", 2 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, taos_idtable); + +/* Driver definition */ +static struct i2c_driver taos_driver = { + .driver = { + .name = "tsl2583", + .pm = TAOS_PM_OPS, + }, + .id_table = taos_idtable, + .probe = taos_probe, + .remove = taos_remove, +}; +module_i2c_driver(taos_driver); + +MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>"); +MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/kernel/drivers/staging/iio/light/tsl2x7x.h b/kernel/drivers/staging/iio/light/tsl2x7x.h new file mode 100644 index 000000000..ecae92211 --- /dev/null +++ b/kernel/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 <linux/pm.h> + +/* 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/kernel/drivers/staging/iio/light/tsl2x7x_core.c b/kernel/drivers/staging/iio/light/tsl2x7x_core.c new file mode 100644 index 000000000..010e607dd --- /dev/null +++ b/kernel/drivers/staging/iio/light/tsl2x7x_core.c @@ -0,0 +1,2030 @@ +/* + * 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 <linux/kernel.h> +#include <linux/i2c.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/iio/events.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include "tsl2x7x.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) + +#define TSL2X7X_MIN_ITIME 3 + +/* 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, +}; + +static const u8 device_channel_config[] = { + ALS, + PRX, + PRX, + ALSPRX, + ALSPRX, + ALS, + PRX2, + PRX2, + ALSPRX2, + ALSPRX2 +}; + +/** + * 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, "failed to write register %x\n", reg); + return ret; + } + + /* read the data */ + ret = i2c_smbus_read_byte(client); + if (ret >= 0) + *val = (u8)ret; + else + dev_err(&client->dev, "failed to read register %x\n", 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, + "failed to read. err=%x\n", 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, + "i2c_write_command failed - err = %d\n", 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, "i2c err=%d\n", 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) + 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, + "failed to write CNTRL register, ret=%d\n", 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, + "failed to write ctrl reg: ret=%d\n", 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) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHHI] = + (chip->tsl2x7x_settings.prox_thres_low >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] = + (chip->tsl2x7x_settings.prox_thres_high) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHHI] = + (chip->tsl2x7x_settings.prox_thres_high >> 8) & 0xFF; + + /* 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 register */ + 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, + "failed on write to reg %d.\n", i); + return ret; + } + } + + mdelay(3); /* 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. + */ +static +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, + "max prox samples cal is too big: %d\n", + 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_to_iio_dev(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_to_iio_dev(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_to_iio_dev(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"); + } + + 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_to_iio_dev(dev)); + int y, z; + + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * TSL2X7X_MIN_ITIME; + 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_to_iio_dev(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + struct tsl2x7x_parse_result result; + int ret; + + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; + + 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_to_iio_dev(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_to_iio_dev(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_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_to_iio_dev(dev)); + int y, z, filter_delay; + + /* Determine integration time */ + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * TSL2X7X_MIN_ITIME; + 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_to_iio_dev(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + struct tsl2x7x_parse_result result; + int y, z, filter_delay; + int ret; + + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; + + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1; + z = y * TSL2X7X_MIN_ITIME; + + 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_to_iio_dev(dev)); + int y, z, filter_delay; + + /* Determine integration time */ + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1; + z = y * TSL2X7X_MIN_ITIME; + 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_to_iio_dev(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + struct tsl2x7x_parse_result result; + int y, z, filter_delay; + int ret; + + ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract); + if (ret) + return ret; + + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1; + z = y * TSL2X7X_MIN_ITIME; + + 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_to_iio_dev(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_to_iio_dev(dev)); + int i = 0; + int offset = 0; + + while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) { + offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,%u,", + 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_to_iio_dev(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_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_to_iio_dev(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, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret; + + if (chan->type == 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, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (chan->type == 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, + 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 tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (chan->type == IIO_INTENSITY) { + switch (dir) { + 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 (dir) { + 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, + 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 tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (chan->type == IIO_INTENSITY) { + switch (dir) { + 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 (dir) { + 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 IIO_VAL_INT; +} + +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_PROCESSED: + switch (chan->type) { + case IIO_LIGHT: + tsl2x7x_get_lux(indio_dev); + *val = chip->als_cur_info.lux; + ret = IIO_VAL_INT; + break; + default: + return -EINVAL; + } + break; + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + 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; + 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; + } + chip->tsl2x7x_settings.als_gain = 3; + break; + case 128: + switch (chip->id) { + case tsl2571: + case tsl2671: + case tmd2671: + case tsl2771: + case tmd2771: + return -EINVAL; + } + 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; + case tmd2671: + case tmd2771: + return (*id & 0xf0) == HALIBUT_ID; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return (*id & 0xf0) == SWORDFISH_ID; + } + + 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, + "Failed to clear irq from event handler. err = %d\n", + 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 iio_event_spec tsl2x7x_events[] = { + { + .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 tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = { + [ALS] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBSCALE) | + BIT(IIO_CHAN_INFO_CALIBBIAS), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, { + .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_separate = BIT(IIO_CHAN_INFO_RAW), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, + }, + .chan_table_elements = 1, + .info = &tsl2X7X_device_info[PRX], + }, + [ALSPRX] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBSCALE) | + BIT(IIO_CHAN_INFO_CALIBBIAS), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 1, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + }, { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, + }, + .chan_table_elements = 4, + .info = &tsl2X7X_device_info[ALSPRX], + }, + [PRX2] = { + .channel = { + { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBSCALE), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, + }, + .chan_table_elements = 1, + .info = &tsl2X7X_device_info[PRX2], + }, + [ALSPRX2] = { + .channel = { + { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBSCALE) | + BIT(IIO_CHAN_INFO_CALIBBIAS), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, { + .type = IIO_INTENSITY, + .indexed = 1, + .channel = 1, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + }, { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBSCALE), + .event_spec = tsl2x7x_events, + .num_event_specs = ARRAY_SIZE(tsl2x7x_events), + }, + }, + .chan_table_elements = 4, + .info = &tsl2X7X_device_info[ALSPRX2], + }, +}; + +static int 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 = devm_iio_device_alloc(&clientp->dev, 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) + return ret; + + 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__); + return -EINVAL; + } + + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, "write to cmd reg failed. err = %d\n", + ret); + return ret; + } + + /* 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 = devm_request_threaded_irq(&clientp->dev, 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__); + return ret; + } + } + + /* 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__); + return ret; + } + + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name); + + return 0; +} + +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 tsl2x7x_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + tsl2x7x_chip_off(indio_dev); + + iio_device_unregister(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 = tsl2x7x_remove, +}; + +module_i2c_driver(tsl2x7x_driver); + +MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>"); +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver"); +MODULE_LICENSE("GPL"); |