| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kuppuswamy Sathyanarayanan | 1696 | 99.94% | 1 | 50.00% |
| Krzysztof Kozlowski | 1 | 0.06% | 1 | 50.00% |
| Total | 1697 | 2 |
/* * 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. * * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD) * * TODO: Interrupt support, thresholds, range support. */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/acpi.h> #include <linux/regmap.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.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 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 0x0FFF #define JSA1212_ALS_DT1_MASK 0xFF #define JSA1212_ALS_DT2_MASK 0x0F #define JSA1212_ALS_RNG_MASK 0x07 /* 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 #define JSA1212_CONF_IRDR_MASK 0x08 /* Proxmity sensing IRDR current sink settings */ #define JSA1212_CONF_IRDR_200MA 0x08 #define JSA1212_CONF_IRDR_100MA 0x00 #define JSA1212_CONF_PXS_SLP_MASK 0x70 #define JSA1212_CONF_PXS_SLP_0MS 0x70 #define JSA1212_CONF_PXS_SLP_12MS 0x60 #define JSA1212_CONF_PXS_SLP_50MS 0x50 #define JSA1212_CONF_PXS_SLP_75MS 0x40 #define JSA1212_CONF_PXS_SLP_100MS 0x30 #define JSA1212_CONF_PXS_SLP_200MS 0x20 #define JSA1212_CONF_PXS_SLP_400MS 0x10 #define JSA1212_CONF_PXS_SLP_800MS 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 200 #define JSA1212_PXS_DELAY_MS 100 #define JSA1212_DRIVER_NAME "jsa1212" #define JSA1212_REGMAP_NAME "jsa1212_regmap" 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; bool als_en; /* ALS enable status */ bool pxs_en; /* proximity enable status */ struct regmap *regmap; }; /* ALS range idx to val mapping */ static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128, 128, 128, 128}; /* Enables or disables ALS function based on status */ static int jsa1212_als_enable(struct jsa1212_data *data, u8 status) { int ret; ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, JSA1212_CONF_ALS_MASK, status); if (ret < 0) return ret; data->als_en = !!status; return 0; } /* Enables or disables PXS function based on status */ static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status) { int ret; ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, JSA1212_CONF_PXS_MASK, status); if (ret < 0) return ret; data->pxs_en = !!status; return 0; } static int jsa1212_read_als_data(struct jsa1212_data *data, unsigned int *val) { int ret; __le16 als_data; 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 = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2); if (ret < 0) { dev_err(&data->client->dev, "als data read err\n"); goto als_data_read_err; } *val = le16_to_cpu(als_data); als_data_read_err: return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE); } static int jsa1212_read_pxs_data(struct jsa1212_data *data, unsigned int *val) { int ret; unsigned int pxs_data; 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 = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data); if (ret < 0) { dev_err(&data->client->dev, "pxs data read err\n"); goto pxs_data_read_err; } *val = pxs_data & JSA1212_PXS_DATA_MASK; pxs_data_read_err: return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE); } 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; } mutex_unlock(&data->lock); return ret < 0 ? ret : IIO_VAL_INT; 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 */ return IIO_VAL_FRACTIONAL; default: break; } break; default: break; } return -EINVAL; } 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 = { .read_raw = &jsa1212_read_raw, }; static int jsa1212_chip_init(struct jsa1212_data *data) { int ret; ret = regmap_write(data->regmap, JSA1212_CONF_REG, (JSA1212_CONF_PXS_SLP_50MS | JSA1212_CONF_IRDR_200MA)); if (ret < 0) return ret; ret = regmap_write(data->regmap, JSA1212_INT_REG, JSA1212_INT_ALS_PRST_4CONV); if (ret < 0) return ret; data->als_rng_idx = JSA1212_ALS_RNG_0_2048; return 0; } static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case JSA1212_PXS_DATA_REG: case JSA1212_ALS_DT1_REG: case JSA1212_ALS_DT2_REG: case JSA1212_INT_REG: return true; default: return false; } } static const struct regmap_config jsa1212_regmap_config = { .name = JSA1212_REGMAP_NAME, .reg_bits = 8, .val_bits = 8, .max_register = JSA1212_MAX_REG, .cache_type = REGCACHE_RBTREE, .volatile_reg = jsa1212_is_volatile_reg, }; static int jsa1212_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct jsa1212_data *data; struct iio_dev *indio_dev; struct regmap *regmap; int ret; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config); if (IS_ERR(regmap)) { dev_err(&client->dev, "Regmap initialization failed.\n"); return PTR_ERR(regmap); } data = iio_priv(indio_dev); i2c_set_clientdata(client, indio_dev); data->client = client; data->regmap = regmap; mutex_init(&data->lock); ret = jsa1212_chip_init(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 = JSA1212_DRIVER_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; } /* power off the device */ static int jsa1212_power_off(struct jsa1212_data *data) { int ret; mutex_lock(&data->lock); ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG, JSA1212_CONF_ALS_MASK | JSA1212_CONF_PXS_MASK, JSA1212_CONF_ALS_DISABLE | JSA1212_CONF_PXS_DISABLE); if (ret < 0) dev_err(&data->client->dev, "power off cmd failed\n"); mutex_unlock(&data->lock); return ret; } 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); iio_device_unregister(indio_dev); return jsa1212_power_off(data); } #ifdef CONFIG_PM_SLEEP static int jsa1212_suspend(struct device *dev) { struct jsa1212_data *data; data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); return jsa1212_power_off(data); } 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 (data->als_en) { ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE); if (ret < 0) { dev_err(dev, "als resume failed\n"); goto unlock_and_ret; } } if (data->pxs_en) { ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE); if (ret < 0) dev_err(dev, "pxs resume failed\n"); } unlock_and_ret: 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_DRIVER_NAME, 0 }, { } }; MODULE_DEVICE_TABLE(i2c, jsa1212_id); static struct i2c_driver jsa1212_driver = { .driver = { .name = JSA1212_DRIVER_NAME, .pm = JSA1212_PM_OPS, .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@linux.intel.com>"); MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver"); MODULE_LICENSE("GPL v2");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1