mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
36edc93958
Based on 1 normalized pattern(s): this file is subject to the terms and conditions of version 2 of the gnu general public license see the file copying in the main directory of this archive for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 55 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.108941081@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
433 lines
11 KiB
C
433 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
|
|
* light and proximity sensor
|
|
*
|
|
* Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
|
|
* Copyright 2019 Pursim SPC
|
|
*
|
|
* IIO driver for:
|
|
* VCNL4000/10/20 (7-bit I2C slave address 0x13)
|
|
* VCNL4040 (7-bit I2C slave address 0x60)
|
|
* VCNL4200 (7-bit I2C slave address 0x51)
|
|
*
|
|
* TODO:
|
|
* allow to adjust IR current
|
|
* proximity threshold and event handling
|
|
* periodic ALS/proximity measurement (VCNL4010/20)
|
|
* interrupts (VCNL4010/20/40, VCNL4200)
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/err.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/sysfs.h>
|
|
|
|
#define VCNL4000_DRV_NAME "vcnl4000"
|
|
#define VCNL4000_PROD_ID 0x01
|
|
#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
|
|
#define VCNL4040_PROD_ID 0x86
|
|
#define VCNL4200_PROD_ID 0x58
|
|
|
|
#define VCNL4000_COMMAND 0x80 /* Command register */
|
|
#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
|
|
#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
|
|
#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
|
|
#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
|
|
#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
|
|
#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
|
|
#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
|
|
#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
|
|
#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
|
|
|
|
#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
|
|
#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
|
|
#define VCNL4200_PS_DATA 0x08 /* Proximity data */
|
|
#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
|
|
#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
|
|
|
|
#define VCNL4040_DEV_ID 0x0c /* Device ID and version */
|
|
|
|
/* Bit masks for COMMAND register */
|
|
#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
|
|
#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
|
|
#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
|
|
#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
|
|
|
|
enum vcnl4000_device_ids {
|
|
VCNL4000,
|
|
VCNL4010,
|
|
VCNL4040,
|
|
VCNL4200,
|
|
};
|
|
|
|
struct vcnl4200_channel {
|
|
u8 reg;
|
|
ktime_t last_measurement;
|
|
ktime_t sampling_rate;
|
|
struct mutex lock;
|
|
};
|
|
|
|
struct vcnl4000_data {
|
|
struct i2c_client *client;
|
|
enum vcnl4000_device_ids id;
|
|
int rev;
|
|
int al_scale;
|
|
const struct vcnl4000_chip_spec *chip_spec;
|
|
struct mutex vcnl4000_lock;
|
|
struct vcnl4200_channel vcnl4200_al;
|
|
struct vcnl4200_channel vcnl4200_ps;
|
|
};
|
|
|
|
struct vcnl4000_chip_spec {
|
|
const char *prod;
|
|
int (*init)(struct vcnl4000_data *data);
|
|
int (*measure_light)(struct vcnl4000_data *data, int *val);
|
|
int (*measure_proximity)(struct vcnl4000_data *data, int *val);
|
|
};
|
|
|
|
static const struct i2c_device_id vcnl4000_id[] = {
|
|
{ "vcnl4000", VCNL4000 },
|
|
{ "vcnl4010", VCNL4010 },
|
|
{ "vcnl4020", VCNL4010 },
|
|
{ "vcnl4040", VCNL4040 },
|
|
{ "vcnl4200", VCNL4200 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
|
|
|
|
static int vcnl4000_init(struct vcnl4000_data *data)
|
|
{
|
|
int ret, prod_id;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
prod_id = ret >> 4;
|
|
switch (prod_id) {
|
|
case VCNL4000_PROD_ID:
|
|
if (data->id != VCNL4000)
|
|
dev_warn(&data->client->dev,
|
|
"wrong device id, use vcnl4000");
|
|
break;
|
|
case VCNL4010_PROD_ID:
|
|
if (data->id != VCNL4010)
|
|
dev_warn(&data->client->dev,
|
|
"wrong device id, use vcnl4010/4020");
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
data->rev = ret & 0xf;
|
|
data->al_scale = 250000;
|
|
mutex_init(&data->vcnl4000_lock);
|
|
|
|
return 0;
|
|
};
|
|
|
|
static int vcnl4200_init(struct vcnl4000_data *data)
|
|
{
|
|
int ret, id;
|
|
|
|
ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
id = ret & 0xff;
|
|
|
|
if (id != VCNL4200_PROD_ID) {
|
|
ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
id = ret & 0xff;
|
|
|
|
if (id != VCNL4040_PROD_ID)
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_dbg(&data->client->dev, "device id 0x%x", id);
|
|
|
|
data->rev = (ret >> 8) & 0xf;
|
|
|
|
/* Set defaults and enable both channels */
|
|
ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->al_scale = 24000;
|
|
data->vcnl4200_al.reg = VCNL4200_AL_DATA;
|
|
data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
|
|
switch (id) {
|
|
case VCNL4200_PROD_ID:
|
|
/* Integration time is 50ms, but the experiments */
|
|
/* show 54ms in total. */
|
|
data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
|
|
data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
|
|
break;
|
|
case VCNL4040_PROD_ID:
|
|
/* Integration time is 80ms, add 10ms. */
|
|
data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000);
|
|
data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000);
|
|
break;
|
|
}
|
|
data->vcnl4200_al.last_measurement = ktime_set(0, 0);
|
|
data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
|
|
mutex_init(&data->vcnl4200_al.lock);
|
|
mutex_init(&data->vcnl4200_ps.lock);
|
|
|
|
return 0;
|
|
};
|
|
|
|
static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
|
|
u8 rdy_mask, u8 data_reg, int *val)
|
|
{
|
|
int tries = 20;
|
|
__be16 buf;
|
|
int ret;
|
|
|
|
mutex_lock(&data->vcnl4000_lock);
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
|
|
req_mask);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/* wait for data to become ready */
|
|
while (tries--) {
|
|
ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
|
|
if (ret < 0)
|
|
goto fail;
|
|
if (ret & rdy_mask)
|
|
break;
|
|
msleep(20); /* measurement takes up to 100 ms */
|
|
}
|
|
|
|
if (tries < 0) {
|
|
dev_err(&data->client->dev,
|
|
"vcnl4000_measure() failed, data not ready\n");
|
|
ret = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
ret = i2c_smbus_read_i2c_block_data(data->client,
|
|
data_reg, sizeof(buf), (u8 *) &buf);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
mutex_unlock(&data->vcnl4000_lock);
|
|
*val = be16_to_cpu(buf);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
mutex_unlock(&data->vcnl4000_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vcnl4200_measure(struct vcnl4000_data *data,
|
|
struct vcnl4200_channel *chan, int *val)
|
|
{
|
|
int ret;
|
|
s64 delta;
|
|
ktime_t next_measurement;
|
|
|
|
mutex_lock(&chan->lock);
|
|
|
|
next_measurement = ktime_add(chan->last_measurement,
|
|
chan->sampling_rate);
|
|
delta = ktime_us_delta(next_measurement, ktime_get());
|
|
if (delta > 0)
|
|
usleep_range(delta, delta + 500);
|
|
chan->last_measurement = ktime_get();
|
|
|
|
mutex_unlock(&chan->lock);
|
|
|
|
ret = i2c_smbus_read_word_data(data->client, chan->reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val)
|
|
{
|
|
return vcnl4000_measure(data,
|
|
VCNL4000_AL_OD, VCNL4000_AL_RDY,
|
|
VCNL4000_AL_RESULT_HI, val);
|
|
}
|
|
|
|
static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val)
|
|
{
|
|
return vcnl4200_measure(data, &data->vcnl4200_al, val);
|
|
}
|
|
|
|
static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val)
|
|
{
|
|
return vcnl4000_measure(data,
|
|
VCNL4000_PS_OD, VCNL4000_PS_RDY,
|
|
VCNL4000_PS_RESULT_HI, val);
|
|
}
|
|
|
|
static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val)
|
|
{
|
|
return vcnl4200_measure(data, &data->vcnl4200_ps, val);
|
|
}
|
|
|
|
static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
|
|
[VCNL4000] = {
|
|
.prod = "VCNL4000",
|
|
.init = vcnl4000_init,
|
|
.measure_light = vcnl4000_measure_light,
|
|
.measure_proximity = vcnl4000_measure_proximity,
|
|
},
|
|
[VCNL4010] = {
|
|
.prod = "VCNL4010/4020",
|
|
.init = vcnl4000_init,
|
|
.measure_light = vcnl4000_measure_light,
|
|
.measure_proximity = vcnl4000_measure_proximity,
|
|
},
|
|
[VCNL4040] = {
|
|
.prod = "VCNL4040",
|
|
.init = vcnl4200_init,
|
|
.measure_light = vcnl4200_measure_light,
|
|
.measure_proximity = vcnl4200_measure_proximity,
|
|
},
|
|
[VCNL4200] = {
|
|
.prod = "VCNL4200",
|
|
.init = vcnl4200_init,
|
|
.measure_light = vcnl4200_measure_light,
|
|
.measure_proximity = vcnl4200_measure_proximity,
|
|
},
|
|
};
|
|
|
|
static const struct iio_chan_spec vcnl4000_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 int vcnl4000_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
int ret;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
switch (chan->type) {
|
|
case IIO_LIGHT:
|
|
ret = data->chip_spec->measure_light(data, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
case IIO_PROXIMITY:
|
|
ret = data->chip_spec->measure_proximity(data, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
case IIO_CHAN_INFO_SCALE:
|
|
if (chan->type != IIO_LIGHT)
|
|
return -EINVAL;
|
|
|
|
*val = 0;
|
|
*val2 = data->al_scale;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const struct iio_info vcnl4000_info = {
|
|
.read_raw = vcnl4000_read_raw,
|
|
};
|
|
|
|
static int vcnl4000_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct vcnl4000_data *data;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
data = iio_priv(indio_dev);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
data->client = client;
|
|
data->id = id->driver_data;
|
|
data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];
|
|
|
|
ret = data->chip_spec->init(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
|
|
data->chip_spec->prod, data->rev);
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
indio_dev->info = &vcnl4000_info;
|
|
indio_dev->channels = vcnl4000_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
|
|
indio_dev->name = VCNL4000_DRV_NAME;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
return devm_iio_device_register(&client->dev, indio_dev);
|
|
}
|
|
|
|
static const struct of_device_id vcnl_4000_of_match[] = {
|
|
{
|
|
.compatible = "vishay,vcnl4000",
|
|
.data = "VCNL4000",
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4010",
|
|
.data = "VCNL4010",
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4010",
|
|
.data = "VCNL4020",
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4200",
|
|
.data = "VCNL4200",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);
|
|
|
|
static struct i2c_driver vcnl4000_driver = {
|
|
.driver = {
|
|
.name = VCNL4000_DRV_NAME,
|
|
.of_match_table = vcnl_4000_of_match,
|
|
},
|
|
.probe = vcnl4000_probe,
|
|
.id_table = vcnl4000_id,
|
|
};
|
|
|
|
module_i2c_driver(vcnl4000_driver);
|
|
|
|
MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
|
|
MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
|
|
MODULE_LICENSE("GPL");
|