This patch adds a new driver for solteam opto JSA1212 proximity and ambient light sensor. Basic details of the chip can be found here. http://www.solteamopto.com.tw/detail.php?ms=3&po_unit=2&pt_unit=29&p_unit=120 Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx> --- drivers/iio/light/Kconfig | 10 + drivers/iio/light/Makefile | 1 + drivers/iio/light/jsa1212.c | 490 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 501 insertions(+) create mode 100644 drivers/iio/light/jsa1212.c diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index c89740d..07d0a76 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -87,6 +87,16 @@ config HID_SENSOR_PROX To compile this driver as a module, choose M here: the module will be called hid-sensor-prox. +config JSA1212 + tristate "JSA1212 ALS and proximity sensor driver" + depends on I2C + help + Say Y here if you want to build a IIO driver for JSA1212 + proximity & ALS sensor device. + + To compile this driver as a module, choose M here: + the module will be called jsa1212. + config SENSORS_LM3533 tristate "LM3533 ambient light sensor" depends on MFD_LM3533 diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 3eb36e5..ce85c86 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_CM36651) += cm36651.o obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o +obj-$(CONFIG_JSA1212) += jsa1212.o obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o obj-$(CONFIG_LTR501) += ltr501.o obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o diff --git a/drivers/iio/light/jsa1212.c b/drivers/iio/light/jsa1212.c new file mode 100644 index 0000000..1597183 --- /dev/null +++ b/drivers/iio/light/jsa1212.c @@ -0,0 +1,490 @@ +/* + * JSA1212 Ambient Light & Proximity Sensor Driver + * + * Copyright (c) 2014, Intel Corporation. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> + +/* JSA1212 reg address */ +#define JSA1212_CONF_REG 0x01 +#define JSA1212_INT_REG 0x02 +#define JSA1212_PXS_LT_REG 0x03 +#define JSA1212_PXS_HT_REG 0x04 +#define JSA1212_ALS_TH1_REG 0x05 +#define JSA1212_ALS_TH2_REG 0x06 +#define JSA1212_ALS_TH3_REG 0x07 +#define JSA1212_PXS_DATA_REG 0x08 +#define JSA1212_ALS_DT1_REG 0x09 +#define JSA1212_ALS_DT2_REG 0x0A +#define JSA1212_ALS_RNG_REG 0x0B +#define JSA1212_MAX_REG 0x0C + +/* JSA1212 reg defaults */ +#define JSA1212_CONF_REG_DEF 0x58 +#define JSA1212_INT_REG_DEF 0x02 +#define JSA1212_PXS_LT_REG_DEF 0x00 +#define JSA1212_PXS_HT_REG_DEF 0xFF +#define JSA1212_ALS_TH1_REG_DEF 0x00 +#define JSA1212_ALS_TH2_REG_DEF 0xF0 +#define JSA1212_ALS_TH3_REG_DEF 0xFF +#define JSA1212_ALS_RNG_REG_DEF 0x00 + +/* JSA1212 reg masks */ +#define JSA1212_CONF_MASK 0xFF +#define JSA1212_INT_MASK 0xFF +#define JSA1212_PXS_LT_MASK 0xFF +#define JSA1212_PXS_HT_MASK 0xFF +#define JSA1212_ALS_TH1_MASK 0xFF +#define JSA1212_ALS_TH2_LT_MASK 0x0F +#define JSA1212_ALS_TH2_HT_MASK 0xF0 +#define JSA1212_ALS_TH3_MASK 0xFF +#define JSA1212_PXS_DATA_MASK 0xFF +#define JSA1212_ALS_DATA_MASK 0xFFF +#define JSA1212_ALS_DT1_MASK 0xFF +#define JSA1212_ALS_DT2_MASK 0x0F +#define JSA1212_ALS_RNG_MASK 0x07 +#define JSA1212_REG_MASK 0xFF + +/* JSA1212 CONF REG bits */ +#define JSA1212_CONF_PXS_MASK 0x80 +#define JSA1212_CONF_PXS_ENABLE 0x80 +#define JSA1212_CONF_PXS_DISABLE 0x00 +#define JSA1212_CONF_ALS_MASK 0x04 +#define JSA1212_CONF_ALS_ENABLE 0x04 +#define JSA1212_CONF_ALS_DISABLE 0x00 + +/* JSA1212 INT REG bits */ +#define JSA1212_INT_CTRL_MASK 0x01 +#define JSA1212_INT_CTRL_EITHER 0x00 +#define JSA1212_INT_CTRL_BOTH 0x01 +#define JSA1212_INT_ALS_PRST_MASK 0x06 +#define JSA1212_INT_ALS_PRST_1CONV 0x00 +#define JSA1212_INT_ALS_PRST_4CONV 0x02 +#define JSA1212_INT_ALS_PRST_8CONV 0x04 +#define JSA1212_INT_ALS_PRST_16CONV 0x06 +#define JSA1212_INT_ALS_FLAG_MASK 0x08 +#define JSA1212_INT_ALS_FLAG_CLR 0x00 +#define JSA1212_INT_PXS_PRST_MASK 0x60 +#define JSA1212_INT_PXS_PRST_1CONV 0x00 +#define JSA1212_INT_PXS_PRST_4CONV 0x20 +#define JSA1212_INT_PXS_PRST_8CONV 0x40 +#define JSA1212_INT_PXS_PRST_16CONV 0x60 +#define JSA1212_INT_PXS_FLAG_MASK 0x80 +#define JSA1212_INT_PXS_FLAG_CLR 0x00 + +/* JSA1212 ALS RNG REG bits */ +#define JSA1212_ALS_RNG_0_2048 0x00 +#define JSA1212_ALS_RNG_0_1024 0x01 +#define JSA1212_ALS_RNG_0_512 0x02 +#define JSA1212_ALS_RNG_0_256 0x03 +#define JSA1212_ALS_RNG_0_128 0x04 + +/* JSA1212 INT threshold range */ +#define JSA1212_ALS_TH_MIN 0x0000 +#define JSA1212_ALS_TH_MAX 0x0FFF +#define JSA1212_PXS_TH_MIN 0x00 +#define JSA1212_PXS_TH_MAX 0xFF + +#define JSA1212_ALS_DELAY_MS 0xC8 +#define JSA1212_PXS_DELAY_MS 0x64 + +enum jsa1212_op_mode { + JSA1212_OPMODE_ALS_EN, + JSA1212_OPMODE_PXS_EN, +}; + +struct jsa1212_data { + struct i2c_client *client; + struct mutex lock; + u8 als_rng_idx; + unsigned long flags; +}; + +/* ALS range idx to val mapping */ +static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128, + 128, 128, 128}; + +static int jsa1212_reg_update(struct jsa1212_data *data, u8 reg, u8 bit_mask, + u8 new_val) +{ + u8 old_cmd, new_cmd; + int ret; + + ret = i2c_smbus_read_byte_data(data->client, reg); + if (ret < 0) { + dev_err(&data->client->dev, + "%s: read reg (0X%02X) cmd failed\n", + __func__, reg); + return ret; + } + + old_cmd = ret & JSA1212_REG_MASK; + new_cmd = old_cmd & ~bit_mask; + new_cmd |= new_val & bit_mask; + + if (new_cmd != old_cmd) { + ret = i2c_smbus_write_byte_data(data->client, reg, new_cmd); + if (ret < 0) { + dev_err(&data->client->dev, + "%s: write reg (0X%02X) cmd (0X%02X) failed\n", + __func__, reg, new_cmd); + return ret; + } + } + + return 0; +} + +/* Enables or disables ALS function based on status */ +static int jsa1212_als_enable(struct jsa1212_data *data, u8 status) +{ + int ret; + + ret = jsa1212_reg_update(data, JSA1212_CONF_REG, + JSA1212_CONF_ALS_MASK, + status); + if (ret < 0) + return ret; + + if (status) + set_bit(JSA1212_OPMODE_ALS_EN, &data->flags); + else + clear_bit(JSA1212_OPMODE_ALS_EN, &data->flags); + + return ret; +} + +/* Enables or disables PXS function based on status */ +static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status) +{ + int ret; + + ret = jsa1212_reg_update(data, JSA1212_CONF_REG, + JSA1212_CONF_PXS_MASK, + status); + if (ret < 0) + return ret; + + if (status) + set_bit(JSA1212_OPMODE_PXS_EN, &data->flags); + else + clear_bit(JSA1212_OPMODE_PXS_EN, &data->flags); + + return ret; +} + +static int jsa1212_read_als_data(struct jsa1212_data *data, + unsigned int *val) +{ + int ret; + + ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE); + if (ret < 0) + return ret; + + /* Delay for data output */ + msleep(JSA1212_ALS_DELAY_MS); + + /* Read 12 bit data */ + ret = i2c_smbus_read_word_data(data->client, JSA1212_ALS_DT1_REG); + if (ret < 0) { + dev_err(&data->client->dev, "als data read err\n"); + return ret; + } + + *val = ret & JSA1212_ALS_DATA_MASK; + + ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE); + if (ret < 0) + return ret; + + return 0; +} + +static int jsa1212_read_pxs_data(struct jsa1212_data *data, + unsigned int *val) +{ + int ret; + + ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE); + if (ret < 0) + return ret; + + /* Delay for data output */ + msleep(JSA1212_PXS_DELAY_MS); + + /* Read out all data */ + ret = i2c_smbus_read_byte_data(data->client, JSA1212_PXS_DATA_REG); + if (ret < 0) { + dev_err(&data->client->dev, "pxs data read err\n"); + return ret; + } + + *val = ret & JSA1212_PXS_DATA_MASK; + + ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE); + if (ret < 0) + return ret; + + return 0; +} + +static int jsa1212_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + int ret; + struct jsa1212_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&data->lock); + switch (chan->type) { + case IIO_LIGHT: + ret = jsa1212_read_als_data(data, val); + break; + case IIO_PROXIMITY: + ret = jsa1212_read_pxs_data(data, val); + break; + default: + ret = -EINVAL; + break; + } + ret = ret < 0 ? ret : IIO_VAL_INT; + mutex_unlock(&data->lock); + break; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_LIGHT: + *val = jsa1212_als_range_val[data->als_rng_idx]; + *val2 = BIT(12); /* Max 12 bit value */ + ret = IIO_VAL_FRACTIONAL; + break; + default: + ret = -EINVAL; + break; + } + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct iio_chan_spec jsa1212_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + }, + { + .type = IIO_PROXIMITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + } +}; + +static const struct iio_info jsa1212_info = { + .driver_module = THIS_MODULE, + .read_raw = &jsa1212_read_raw, +}; + +static int jsa1212_chip_init(struct jsa1212_data *data) +{ + int ret; + + ret = i2c_smbus_write_byte_data(data->client, JSA1212_CONF_REG, + JSA1212_CONF_REG_DEF); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(data->client, JSA1212_INT_REG, + JSA1212_INT_REG_DEF); + if (ret < 0) + return ret; + + data->als_rng_idx = JSA1212_ALS_RNG_0_2048; + data->flags = 0x00; + + return 0; +} + +static int jsa1212_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct jsa1212_data *jsa1212_data; + struct iio_dev *indio_dev; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*jsa1212_data)); + if (!indio_dev) + return -ENOMEM; + + jsa1212_data = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + jsa1212_data->client = client; + + mutex_init(&jsa1212_data->lock); + + ret = jsa1212_chip_init(jsa1212_data); + if (ret < 0) + return ret; + + indio_dev->dev.parent = &client->dev; + indio_dev->channels = jsa1212_channels; + indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels); + indio_dev->name = id->name; + indio_dev->modes = INDIO_DIRECT_MODE; + + indio_dev->info = &jsa1212_info; + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(&client->dev, "%s: register device failed\n", __func__); + return ret; + } + + return 0; +} + +static int jsa1212_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct jsa1212_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->lock); + + ret = jsa1212_reg_update(data, JSA1212_CONF_REG, + JSA1212_CONF_ALS_MASK | + JSA1212_CONF_PXS_MASK, + JSA1212_CONF_ALS_DISABLE | + JSA1212_CONF_PXS_DISABLE); + + if (ret < 0) + dev_err(&client->dev, "power off cmd failed\n"); + + mutex_unlock(&data->lock); + + iio_device_unregister(indio_dev); + + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static int jsa1212_suspend(struct device *dev) +{ + int ret; + struct jsa1212_data *data; + + data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); + + mutex_lock(&data->lock); + + ret = jsa1212_reg_update(data, JSA1212_CONF_REG, + JSA1212_CONF_ALS_MASK | + JSA1212_CONF_PXS_MASK, + JSA1212_CONF_ALS_DISABLE | + JSA1212_CONF_PXS_DISABLE); + + if (ret < 0) + dev_err(dev, "suspend cmd failed\n"); + + mutex_unlock(&data->lock); + + return ret; +} + +static int jsa1212_resume(struct device *dev) +{ + int ret = 0; + struct jsa1212_data *data; + + data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); + + mutex_lock(&data->lock); + + if (test_bit(JSA1212_OPMODE_ALS_EN, &data->flags)) { + ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE); + if (ret < 0) { + dev_err(dev, "als resume failed\n"); + mutex_unlock(&data->lock); + return ret; + } + } + + if (test_bit(JSA1212_OPMODE_PXS_EN, &data->flags)) { + ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE); + if (ret < 0) + dev_err(dev, "pxs resume failed\n"); + } + + mutex_unlock(&data->lock); + + return ret; +} + +static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume); + +#define JSA1212_PM_OPS (&jsa1212_pm_ops) +#else +#define JSA1212_PM_OPS NULL +#endif + +static const struct acpi_device_id jsa1212_acpi_match[] = { + {"JSA1212", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match); + +static const struct i2c_device_id jsa1212_id[] = { + { "jsa1212", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, jsa1212_id); + +static struct i2c_driver jsa1212_driver = { + .driver = { + .name = "jsa1212", + .pm = JSA1212_PM_OPS, + .owner = THIS_MODULE, + .acpi_match_table = ACPI_PTR(jsa1212_acpi_match), + }, + .probe = jsa1212_probe, + .remove = jsa1212_remove, + .id_table = jsa1212_id, +}; +module_i2c_driver(jsa1212_driver); + +MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver"); +MODULE_LICENSE("GPL v2"); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
