iio: add adjd_s311 I2C digital color sensor driver
sensor has 4 channels (10-bit each, R/G/B and clear), sensitivity and gain is controlled in the driver by ext_info integration_time and CHAN_INFO_HARDWAREGAIN driver supports triggered buffer and IIO_CHAN_INFO_RAW to get the sensor data v5: address comments by Jonathan Cameron * use macro for channel declaration * get timestamp right before measurement * cleanups v4: address comments by Lars-Peter Clausen * make sure trigger handler is exited with iio_trigger_notify_done() and IRQ_HANDLED * kfree()/kalloc() -> krealloc() v3: * fix warnings v2: address comments by Lars-Peter Clausen * buffer allocation now in update_scan_mode instead of in trigger handler * simplify trigger code (assume active_scan_mask is not empty, use for_each_set_bit, use iio_push_to_buffer) * reorder entry in Makefile and Kconfig * fix remove Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald
Jonathan Cameron
parent
d05b2fe037
commit
bbdb822c4c
3 changed files with 377 additions and 0 deletions
|
|
@ -3,6 +3,18 @@
|
|||
#
|
||||
menu "Light sensors"
|
||||
|
||||
config ADJD_S311
|
||||
tristate "ADJD-S311-CR999 digital color sensor"
|
||||
select IIO_BUFFER
|
||||
select IIO_TRIGGERED_BUFFER
|
||||
depends on I2C
|
||||
help
|
||||
If you say yes here you get support for the Avago ADJD-S311-CR999
|
||||
digital color light sensor.
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called adjd_s311.
|
||||
|
||||
config SENSORS_LM3533
|
||||
tristate "LM3533 ambient light sensor"
|
||||
depends on MFD_LM3533
|
||||
|
|
|
|||
|
|
@ -2,5 +2,6 @@
|
|||
# Makefile for IIO Light sensors
|
||||
#
|
||||
|
||||
obj-$(CONFIG_ADJD_S311) += adjd_s311.o
|
||||
obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
|
||||
obj-$(CONFIG_VCNL4000) += vcnl4000.o
|
||||
|
|
|
|||
364
drivers/iio/light/adjd_s311.c
Normal file
364
drivers/iio/light/adjd_s311.c
Normal file
|
|
@ -0,0 +1,364 @@
|
|||
/*
|
||||
* adjd_s311.c - Support for ADJD-S311-CR999 digital color sensor
|
||||
*
|
||||
* Copyright (C) 2012 Peter Meerwald <pmeerw@pmeerw.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* driver for ADJD-S311-CR999 digital color sensor (10-bit channels for
|
||||
* red, green, blue, clear); 7-bit I2C slave address 0x74
|
||||
*
|
||||
* limitations: no calibration, no offset mode, no sleep mode
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/bitmap.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/irq.h>
|
||||
|
||||
#include <linux/iio/iio.h>
|
||||
#include <linux/iio/sysfs.h>
|
||||
#include <linux/iio/trigger_consumer.h>
|
||||
#include <linux/iio/buffer.h>
|
||||
#include <linux/iio/triggered_buffer.h>
|
||||
|
||||
#define ADJD_S311_DRV_NAME "adjd_s311"
|
||||
|
||||
#define ADJD_S311_CTRL 0x00
|
||||
#define ADJD_S311_CONFIG 0x01
|
||||
#define ADJD_S311_CAP_RED 0x06
|
||||
#define ADJD_S311_CAP_GREEN 0x07
|
||||
#define ADJD_S311_CAP_BLUE 0x08
|
||||
#define ADJD_S311_CAP_CLEAR 0x09
|
||||
#define ADJD_S311_INT_RED_LO 0x0a
|
||||
#define ADJD_S311_INT_RED_HI 0x0b
|
||||
#define ADJD_S311_INT_GREEN_LO 0x0c
|
||||
#define ADJD_S311_INT_GREEN_HI 0x0d
|
||||
#define ADJD_S311_INT_BLUE_LO 0x0e
|
||||
#define ADJD_S311_INT_BLUE_HI 0x0f
|
||||
#define ADJD_S311_INT_CLEAR_LO 0x10
|
||||
#define ADJD_S311_INT_CLEAR_HI 0x11
|
||||
#define ADJD_S311_DATA_RED_LO 0x40
|
||||
#define ADJD_S311_DATA_RED_HI 0x41
|
||||
#define ADJD_S311_DATA_GREEN_LO 0x42
|
||||
#define ADJD_S311_DATA_GREEN_HI 0x43
|
||||
#define ADJD_S311_DATA_BLUE_LO 0x44
|
||||
#define ADJD_S311_DATA_BLUE_HI 0x45
|
||||
#define ADJD_S311_DATA_CLEAR_LO 0x46
|
||||
#define ADJD_S311_DATA_CLEAR_HI 0x47
|
||||
#define ADJD_S311_OFFSET_RED 0x48
|
||||
#define ADJD_S311_OFFSET_GREEN 0x49
|
||||
#define ADJD_S311_OFFSET_BLUE 0x4a
|
||||
#define ADJD_S311_OFFSET_CLEAR 0x4b
|
||||
|
||||
#define ADJD_S311_CTRL_GOFS 0x02
|
||||
#define ADJD_S311_CTRL_GSSR 0x01
|
||||
#define ADJD_S311_CAP_MASK 0x0f
|
||||
#define ADJD_S311_INT_MASK 0x0fff
|
||||
#define ADJD_S311_DATA_MASK 0x03ff
|
||||
|
||||
struct adjd_s311_data {
|
||||
struct i2c_client *client;
|
||||
u16 *buffer;
|
||||
};
|
||||
|
||||
enum adjd_s311_channel_idx {
|
||||
IDX_RED, IDX_GREEN, IDX_BLUE, IDX_CLEAR
|
||||
};
|
||||
|
||||
#define ADJD_S311_DATA_REG(chan) (ADJD_S311_DATA_RED_LO + (chan) * 2)
|
||||
#define ADJD_S311_INT_REG(chan) (ADJD_S311_INT_RED_LO + (chan) * 2)
|
||||
#define ADJD_S311_CAP_REG(chan) (ADJD_S311_CAP_RED + (chan))
|
||||
|
||||
static int adjd_s311_req_data(struct iio_dev *indio_dev)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
int tries = 10;
|
||||
|
||||
int ret = i2c_smbus_write_byte_data(data->client, ADJD_S311_CTRL,
|
||||
ADJD_S311_CTRL_GSSR);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
while (tries--) {
|
||||
ret = i2c_smbus_read_byte_data(data->client, ADJD_S311_CTRL);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (!(ret & ADJD_S311_CTRL_GSSR))
|
||||
break;
|
||||
msleep(20);
|
||||
}
|
||||
|
||||
if (tries < 0) {
|
||||
dev_err(&data->client->dev,
|
||||
"adjd_s311_req_data() failed, data not ready\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int adjd_s311_read_data(struct iio_dev *indio_dev, u8 reg, int *val)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
|
||||
int ret = adjd_s311_req_data(indio_dev);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = i2c_smbus_read_word_data(data->client, reg);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*val = ret & ADJD_S311_DATA_MASK;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t adjd_s311_read_int_time(struct iio_dev *indio_dev,
|
||||
uintptr_t private, const struct iio_chan_spec *chan, char *buf)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
s32 ret;
|
||||
|
||||
ret = i2c_smbus_read_word_data(data->client,
|
||||
ADJD_S311_INT_REG(chan->address));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return sprintf(buf, "%d\n", ret & ADJD_S311_INT_MASK);
|
||||
}
|
||||
|
||||
static ssize_t adjd_s311_write_int_time(struct iio_dev *indio_dev,
|
||||
uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
unsigned long int_time;
|
||||
int ret;
|
||||
|
||||
ret = kstrtoul(buf, 10, &int_time);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (int_time > ADJD_S311_INT_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
ret = i2c_smbus_write_word_data(data->client,
|
||||
ADJD_S311_INT_REG(chan->address), int_time);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
|
||||
{
|
||||
struct iio_poll_func *pf = p;
|
||||
struct iio_dev *indio_dev = pf->indio_dev;
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
struct iio_buffer *buffer = indio_dev->buffer;
|
||||
s64 time_ns = iio_get_time_ns();
|
||||
int len = 0;
|
||||
int i, j = 0;
|
||||
|
||||
int ret = adjd_s311_req_data(indio_dev);
|
||||
if (ret < 0)
|
||||
goto done;
|
||||
|
||||
for_each_set_bit(i, indio_dev->active_scan_mask,
|
||||
indio_dev->masklength) {
|
||||
ret = i2c_smbus_read_word_data(data->client,
|
||||
ADJD_S311_DATA_REG(i));
|
||||
if (ret < 0)
|
||||
goto done;
|
||||
|
||||
data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
|
||||
len += 2;
|
||||
}
|
||||
|
||||
if (indio_dev->scan_timestamp)
|
||||
*(s64 *)((phys_addr_t)data->buffer + ALIGN(len, sizeof(s64)))
|
||||
= time_ns;
|
||||
iio_push_to_buffer(buffer, (u8 *)data->buffer, time_ns);
|
||||
|
||||
done:
|
||||
iio_trigger_notify_done(indio_dev->trig);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static const struct iio_chan_spec_ext_info adjd_s311_ext_info[] = {
|
||||
{
|
||||
.name = "integration_time",
|
||||
.read = adjd_s311_read_int_time,
|
||||
.write = adjd_s311_write_int_time,
|
||||
},
|
||||
{ }
|
||||
};
|
||||
|
||||
#define ADJD_S311_CHANNEL(_color, _scan_idx) { \
|
||||
.type = IIO_INTENSITY, \
|
||||
.modified = 1, \
|
||||
.address = (IDX_##_color), \
|
||||
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
|
||||
IIO_CHAN_INFO_HARDWAREGAIN_SEPARATE_BIT, \
|
||||
.channel2 = (IIO_MOD_LIGHT_##_color), \
|
||||
.scan_index = (_scan_idx), \
|
||||
.scan_type = IIO_ST('u', 10, 16, 0), \
|
||||
.ext_info = adjd_s311_ext_info, \
|
||||
}
|
||||
|
||||
static const struct iio_chan_spec adjd_s311_channels[] = {
|
||||
ADJD_S311_CHANNEL(RED, 0),
|
||||
ADJD_S311_CHANNEL(GREEN, 1),
|
||||
ADJD_S311_CHANNEL(BLUE, 2),
|
||||
ADJD_S311_CHANNEL(CLEAR, 3),
|
||||
IIO_CHAN_SOFT_TIMESTAMP(4),
|
||||
};
|
||||
|
||||
static int adjd_s311_read_raw(struct iio_dev *indio_dev,
|
||||
struct iio_chan_spec const *chan,
|
||||
int *val, int *val2, long mask)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
int ret;
|
||||
|
||||
switch (mask) {
|
||||
case IIO_CHAN_INFO_RAW:
|
||||
ret = adjd_s311_read_data(indio_dev, chan->address, val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
return IIO_VAL_INT;
|
||||
case IIO_CHAN_INFO_HARDWAREGAIN:
|
||||
ret = i2c_smbus_read_byte_data(data->client,
|
||||
ADJD_S311_CAP_REG(chan->address));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
*val = ret & ADJD_S311_CAP_MASK;
|
||||
return IIO_VAL_INT;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int adjd_s311_write_raw(struct iio_dev *indio_dev,
|
||||
struct iio_chan_spec const *chan,
|
||||
int val, int val2, long mask)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
int ret;
|
||||
|
||||
switch (mask) {
|
||||
case IIO_CHAN_INFO_HARDWAREGAIN:
|
||||
if (val < 0 || val > ADJD_S311_CAP_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
ret = i2c_smbus_write_byte_data(data->client,
|
||||
ADJD_S311_CAP_REG(chan->address), val);
|
||||
return ret;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
|
||||
const unsigned long *scan_mask)
|
||||
{
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
data->buffer = krealloc(data->buffer, indio_dev->scan_bytes,
|
||||
GFP_KERNEL);
|
||||
if (!data->buffer)
|
||||
return -ENOMEM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct iio_info adjd_s311_info = {
|
||||
.read_raw = adjd_s311_read_raw,
|
||||
.write_raw = adjd_s311_write_raw,
|
||||
.update_scan_mode = adjd_s311_update_scan_mode,
|
||||
.driver_module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __devinit adjd_s311_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct adjd_s311_data *data;
|
||||
struct iio_dev *indio_dev;
|
||||
int err;
|
||||
|
||||
indio_dev = iio_device_alloc(sizeof(*data));
|
||||
if (indio_dev == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto exit;
|
||||
}
|
||||
data = iio_priv(indio_dev);
|
||||
i2c_set_clientdata(client, indio_dev);
|
||||
data->client = client;
|
||||
|
||||
indio_dev->dev.parent = &client->dev;
|
||||
indio_dev->info = &adjd_s311_info;
|
||||
indio_dev->name = ADJD_S311_DRV_NAME;
|
||||
indio_dev->channels = adjd_s311_channels;
|
||||
indio_dev->num_channels = ARRAY_SIZE(adjd_s311_channels);
|
||||
indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
|
||||
err = iio_triggered_buffer_setup(indio_dev, NULL,
|
||||
adjd_s311_trigger_handler, NULL);
|
||||
if (err < 0)
|
||||
goto exit_free_device;
|
||||
|
||||
err = iio_device_register(indio_dev);
|
||||
if (err)
|
||||
goto exit_unreg_buffer;
|
||||
|
||||
dev_info(&client->dev, "ADJD-S311 color sensor registered\n");
|
||||
|
||||
return 0;
|
||||
|
||||
exit_unreg_buffer:
|
||||
iio_triggered_buffer_cleanup(indio_dev);
|
||||
exit_free_device:
|
||||
iio_device_free(indio_dev);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit adjd_s311_remove(struct i2c_client *client)
|
||||
{
|
||||
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
||||
struct adjd_s311_data *data = iio_priv(indio_dev);
|
||||
|
||||
iio_device_unregister(indio_dev);
|
||||
iio_triggered_buffer_cleanup(indio_dev);
|
||||
kfree(data->buffer);
|
||||
iio_device_free(indio_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id adjd_s311_id[] = {
|
||||
{ "adjd_s311", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, adjd_s311_id);
|
||||
|
||||
static struct i2c_driver adjd_s311_driver = {
|
||||
.driver = {
|
||||
.name = ADJD_S311_DRV_NAME,
|
||||
},
|
||||
.probe = adjd_s311_probe,
|
||||
.remove = __devexit_p(adjd_s311_remove),
|
||||
.id_table = adjd_s311_id,
|
||||
};
|
||||
module_i2c_driver(adjd_s311_driver);
|
||||
|
||||
MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
|
||||
MODULE_DESCRIPTION("ADJD-S311 color sensor");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in a new issue