diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7152.c')
| -rw-r--r-- | drivers/staging/iio/adc/ad7152.c | 586 |
1 files changed, 0 insertions, 586 deletions
diff --git a/drivers/staging/iio/adc/ad7152.c b/drivers/staging/iio/adc/ad7152.c deleted file mode 100644 index 21f5f380fb5e..000000000000 --- a/drivers/staging/iio/adc/ad7152.c +++ /dev/null @@ -1,586 +0,0 @@ -/* - * AD7152 capacitive sensor driver supporting AD7152/3 - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/interrupt.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/sysfs.h> -#include <linux/i2c.h> - -#include "../iio.h" -#include "../sysfs.h" - -/* - * AD7152 registers definition - */ - -#define AD7152_STATUS 0 -#define AD7152_STATUS_RDY1 (1 << 0) -#define AD7152_STATUS_RDY2 (1 << 1) -#define AD7152_CH1_DATA_HIGH 1 -#define AD7152_CH1_DATA_LOW 2 -#define AD7152_CH2_DATA_HIGH 3 -#define AD7152_CH2_DATA_LOW 4 -#define AD7152_CH1_OFFS_HIGH 5 -#define AD7152_CH1_OFFS_LOW 6 -#define AD7152_CH2_OFFS_HIGH 7 -#define AD7152_CH2_OFFS_LOW 8 -#define AD7152_CH1_GAIN_HIGH 9 -#define AD7152_CH1_GAIN_LOW 10 -#define AD7152_CH1_SETUP 11 -#define AD7152_CH2_GAIN_HIGH 12 -#define AD7152_CH2_GAIN_LOW 13 -#define AD7152_CH2_SETUP 14 -#define AD7152_CFG 15 -#define AD7152_RESEVERD 16 -#define AD7152_CAPDAC_POS 17 -#define AD7152_CAPDAC_NEG 18 -#define AD7152_CFG2 26 - -#define AD7152_MAX_CONV_MODE 6 - -/* - * struct ad7152_chip_info - chip specifc information - */ - -struct ad7152_chip_info { - struct i2c_client *client; - u16 ch1_offset; /* Channel 1 offset calibration coefficient */ - u16 ch1_gain; /* Channel 1 gain coefficient */ - u8 ch1_setup; - u16 ch2_offset; /* Channel 2 offset calibration coefficient */ - u16 ch2_gain; /* Channel 1 gain coefficient */ - u8 ch2_setup; - u8 filter_rate_setup; /* Capacitive channel digital filter setup; conversion time/update rate setup per channel */ - char *conversion_mode; -}; - -struct ad7152_conversion_mode { - char *name; - u8 reg_cfg; -}; - -static struct ad7152_conversion_mode -ad7152_conv_mode_table[AD7152_MAX_CONV_MODE] = { - { "idle", 0 }, - { "continuous-conversion", 1 }, - { "single-conversion", 2 }, - { "power-down", 3 }, - { "offset-calibration", 5 }, - { "gain-calibration", 6 }, -}; - -/* - * ad7152 register access by I2C - */ - -static int ad7152_i2c_read(struct ad7152_chip_info *chip, u8 reg, u8 *data, int len) -{ - struct i2c_client *client = chip->client; - int ret; - - ret = i2c_master_send(client, ®, 1); - if (ret < 0) { - dev_err(&client->dev, "I2C write error\n"); - return ret; - } - - ret = i2c_master_recv(client, data, len); - if (ret < 0) { - dev_err(&client->dev, "I2C read error\n"); - } - - return ret; -} - -static int ad7152_i2c_write(struct ad7152_chip_info *chip, u8 reg, u8 data) -{ - struct i2c_client *client = chip->client; - int ret; - - u8 tx[2] = { - reg, - data, - }; - - ret = i2c_master_send(client, tx, 2); - if (ret < 0) - dev_err(&client->dev, "I2C write error\n"); - - return ret; -} - -/* - * sysfs nodes - */ - -#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show) \ - IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store) \ - IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_OFFSET(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_offset, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_OFFSET(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_offset, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_GAIN(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_gain, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_GAIN(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_gain, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_VALUE(_show) \ - IIO_DEVICE_ATTR(ch1_value, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CH2_VALUE(_show) \ - IIO_DEVICE_ATTR(ch2_value, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CH1_SETUP(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_setup, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_SETUP(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_setup, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_FILTER_RATE_SETUP(_mode, _show, _store) \ - IIO_DEVICE_ATTR(filter_rate_setup, _mode, _show, _store, 0) - -static ssize_t ad7152_show_conversion_modes(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int i; - int len = 0; - - for (i = 0; i < AD7152_MAX_CONV_MODE; i++) - len += sprintf(buf + len, "%s ", ad7152_conv_mode_table[i].name); - - len += sprintf(buf + len, "\n"); - - return len; -} - -static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad7152_show_conversion_modes); - -static ssize_t ad7152_show_ch1_value(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - u8 data[2]; - - ad7152_i2c_read(chip, AD7152_CH1_DATA_HIGH, data, 2); - return sprintf(buf, "%d\n", ((int)data[0] << 8) | data[1]); -} - -static IIO_DEV_ATTR_CH1_VALUE(ad7152_show_ch1_value); - -static ssize_t ad7152_show_ch2_value(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - u8 data[2]; - - ad7152_i2c_read(chip, AD7152_CH2_DATA_HIGH, data, 2); - return sprintf(buf, "%d\n", ((int)data[0] << 8) | data[1]); -} - -static IIO_DEV_ATTR_CH2_VALUE(ad7152_show_ch2_value); - -static ssize_t ad7152_show_conversion_mode(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%s\n", chip->conversion_mode); -} - -static ssize_t ad7152_store_conversion_mode(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - u8 cfg; - int i; - - ad7152_i2c_read(chip, AD7152_CFG, &cfg, 1); - - for (i = 0; i < AD7152_MAX_CONV_MODE; i++) - if (strncmp(buf, ad7152_conv_mode_table[i].name, - strlen(ad7152_conv_mode_table[i].name) - 1) == 0) { - chip->conversion_mode = ad7152_conv_mode_table[i].name; - cfg |= 0x18 | ad7152_conv_mode_table[i].reg_cfg; - ad7152_i2c_write(chip, AD7152_CFG, cfg); - return len; - } - - dev_err(dev, "not supported conversion mode\n"); - - return -EINVAL; -} - -static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR, - ad7152_show_conversion_mode, - ad7152_store_conversion_mode); - -static ssize_t ad7152_show_ch1_offset(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch1_offset); -} - -static ssize_t ad7152_store_ch1_offset(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7152_i2c_write(chip, AD7152_CH1_OFFS_HIGH, data >> 8); - ad7152_i2c_write(chip, AD7152_CH1_OFFS_LOW, data); - chip->ch1_offset = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_OFFSET(S_IRUGO | S_IWUSR, - ad7152_show_ch1_offset, - ad7152_store_ch1_offset); - -static ssize_t ad7152_show_ch2_offset(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch2_offset); -} - -static ssize_t ad7152_store_ch2_offset(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7152_i2c_write(chip, AD7152_CH2_OFFS_HIGH, data >> 8); - ad7152_i2c_write(chip, AD7152_CH2_OFFS_LOW, data); - chip->ch2_offset = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_OFFSET(S_IRUGO | S_IWUSR, - ad7152_show_ch2_offset, - ad7152_store_ch2_offset); - -static ssize_t ad7152_show_ch1_gain(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch1_gain); -} - -static ssize_t ad7152_store_ch1_gain(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7152_i2c_write(chip, AD7152_CH1_GAIN_HIGH, data >> 8); - ad7152_i2c_write(chip, AD7152_CH1_GAIN_LOW, data); - chip->ch1_gain = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_GAIN(S_IRUGO | S_IWUSR, - ad7152_show_ch1_gain, - ad7152_store_ch1_gain); - -static ssize_t ad7152_show_ch2_gain(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch2_gain); -} - -static ssize_t ad7152_store_ch2_gain(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7152_i2c_write(chip, AD7152_CH2_GAIN_HIGH, data >> 8); - ad7152_i2c_write(chip, AD7152_CH2_GAIN_LOW, data); - chip->ch2_gain = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_GAIN(S_IRUGO | S_IWUSR, - ad7152_show_ch2_gain, - ad7152_store_ch2_gain); - -static ssize_t ad7152_show_ch1_setup(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->ch1_setup); -} - -static ssize_t ad7152_store_ch1_setup(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7152_i2c_write(chip, AD7152_CH1_SETUP, data); - chip->ch1_setup = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_SETUP(S_IRUGO | S_IWUSR, - ad7152_show_ch1_setup, - ad7152_store_ch1_setup); - -static ssize_t ad7152_show_ch2_setup(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->ch2_setup); -} - -static ssize_t ad7152_store_ch2_setup(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7152_i2c_write(chip, AD7152_CH2_SETUP, data); - chip->ch2_setup = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_SETUP(S_IRUGO | S_IWUSR, - ad7152_show_ch2_setup, - ad7152_store_ch2_setup); - -static ssize_t ad7152_show_filter_rate_setup(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->filter_rate_setup); -} - -static ssize_t ad7152_store_filter_rate_setup(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7152_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7152_i2c_write(chip, AD7152_CFG2, data); - chip->filter_rate_setup = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_FILTER_RATE_SETUP(S_IRUGO | S_IWUSR, - ad7152_show_filter_rate_setup, - ad7152_store_filter_rate_setup); - -static struct attribute *ad7152_attributes[] = { - &iio_dev_attr_available_conversion_modes.dev_attr.attr, - &iio_dev_attr_conversion_mode.dev_attr.attr, - &iio_dev_attr_ch1_gain.dev_attr.attr, - &iio_dev_attr_ch2_gain.dev_attr.attr, - &iio_dev_attr_ch1_offset.dev_attr.attr, - &iio_dev_attr_ch2_offset.dev_attr.attr, - &iio_dev_attr_ch1_value.dev_attr.attr, - &iio_dev_attr_ch2_value.dev_attr.attr, - &iio_dev_attr_ch1_setup.dev_attr.attr, - &iio_dev_attr_ch2_setup.dev_attr.attr, - &iio_dev_attr_filter_rate_setup.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad7152_attribute_group = { - .attrs = ad7152_attributes, -}; - -static const struct iio_info ad7152_info = { - .attrs = &ad7152_attribute_group, - .driver_module = THIS_MODULE, -}; -/* - * device probe and remove - */ - -static int __devinit ad7152_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret = 0; - struct ad7152_chip_info *chip; - struct iio_dev *indio_dev; - - indio_dev = iio_allocate_device(sizeof(*chip)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - chip = iio_priv(indio_dev); - /* this is only used for device removal purposes */ - i2c_set_clientdata(client, indio_dev); - - chip->client = client; - - /* Echipabilish that the iio_dev is a child of the i2c device */ - indio_dev->name = id->name; - indio_dev->dev.parent = &client->dev; - indio_dev->info = &ad7152_info; - indio_dev->modes = INDIO_DIRECT_MODE; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_free_dev; - - dev_err(&client->dev, "%s capacitive sensor registered\n", id->name); - - return 0; - -error_free_dev: - iio_free_device(indio_dev); -error_ret: - return ret; -} - -static int __devexit ad7152_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 ad7152_id[] = { - { "ad7152", 0 }, - { "ad7153", 0 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ad7152_id); - -static struct i2c_driver ad7152_driver = { - .driver = { - .name = "ad7152", - }, - .probe = ad7152_probe, - .remove = __devexit_p(ad7152_remove), - .id_table = ad7152_id, -}; - -static __init int ad7152_init(void) -{ - return i2c_add_driver(&ad7152_driver); -} - -static __exit void ad7152_exit(void) -{ - i2c_del_driver(&ad7152_driver); -} - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ad7152/3 capacitive sensor driver"); -MODULE_LICENSE("GPL v2"); - -module_init(ad7152_init); -module_exit(ad7152_exit); |