diff options
Diffstat (limited to 'drivers/staging/iio/dac/ad5380.c')
| -rw-r--r-- | drivers/staging/iio/dac/ad5380.c | 677 |
1 files changed, 0 insertions, 677 deletions
diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c deleted file mode 100644 index 370d2842190e..000000000000 --- a/drivers/staging/iio/dac/ad5380.c +++ /dev/null @@ -1,677 +0,0 @@ -/* - * Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392 - * multi-channel Digital to Analog Converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include <linux/device.h> -#include <linux/err.h> -#include <linux/i2c.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> -#include <linux/sysfs.h> -#include <linux/regmap.h> -#include <linux/regulator/consumer.h> - -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> -#include "dac.h" - - -#define AD5380_REG_DATA(x) (((x) << 2) | 3) -#define AD5380_REG_OFFSET(x) (((x) << 2) | 2) -#define AD5380_REG_GAIN(x) (((x) << 2) | 1) -#define AD5380_REG_SF_PWR_DOWN (8 << 2) -#define AD5380_REG_SF_PWR_UP (9 << 2) -#define AD5380_REG_SF_CTRL (12 << 2) - -#define AD5380_CTRL_PWR_DOWN_MODE_OFFSET 13 -#define AD5380_CTRL_INT_VREF_2V5 BIT(12) -#define AD5380_CTRL_INT_VREF_EN BIT(10) - -/** - * struct ad5380_chip_info - chip specific information - * @channel_template: channel specification template - * @num_channels: number of channels - * @int_vref: internal vref in uV -*/ - -struct ad5380_chip_info { - struct iio_chan_spec channel_template; - unsigned int num_channels; - unsigned int int_vref; -}; - -/** - * struct ad5380_state - driver instance specific data - * @regmap: regmap instance used by the device - * @chip_info: chip model specific constants, available modes etc - * @vref_reg: vref supply regulator - * @vref: actual reference voltage used in uA - * @pwr_down: whether the chip is currently in power down mode - */ - -struct ad5380_state { - struct regmap *regmap; - const struct ad5380_chip_info *chip_info; - struct regulator *vref_reg; - int vref; - bool pwr_down; -}; - -enum ad5380_type { - ID_AD5380_3, - ID_AD5380_5, - ID_AD5381_3, - ID_AD5381_5, - ID_AD5382_3, - ID_AD5382_5, - ID_AD5383_3, - ID_AD5383_5, - ID_AD5390_3, - ID_AD5390_5, - ID_AD5391_3, - ID_AD5391_5, - ID_AD5392_3, - ID_AD5392_5, -}; - -#define AD5380_CHANNEL(_bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT | \ - IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ - .scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)) \ -} - -static const struct ad5380_chip_info ad5380_chip_info_tbl[] = { - [ID_AD5380_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 40, - .int_vref = 1250000, - }, - [ID_AD5380_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 40, - .int_vref = 2500000, - }, - [ID_AD5381_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5381_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5382_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 32, - .int_vref = 1250000, - }, - [ID_AD5382_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 32, - .int_vref = 2500000, - }, - [ID_AD5383_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 32, - .int_vref = 1250000, - }, - [ID_AD5383_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 32, - .int_vref = 2500000, - }, - [ID_AD5390_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5390_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5391_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5391_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5392_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 8, - .int_vref = 1250000, - }, - [ID_AD5392_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 8, - .int_vref = 2500000, - }, -}; - -static ssize_t ad5380_read_dac_powerdown(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad5380_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", st->pwr_down); -} - -static ssize_t ad5380_write_dac_powerdown(struct device *dev, - struct device_attribute *attr, const char *buf, size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad5380_state *st = iio_priv(indio_dev); - bool pwr_down; - int ret; - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - mutex_lock(&indio_dev->mlock); - - if (pwr_down) - ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0); - else - ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0); - - st->pwr_down = pwr_down; - - mutex_unlock(&indio_dev->mlock); - - return ret ? ret : len; -} - -static IIO_DEVICE_ATTR(out_voltage_powerdown, - S_IRUGO | S_IWUSR, - ad5380_read_dac_powerdown, - ad5380_write_dac_powerdown, 0); - -static const char ad5380_powerdown_modes[][15] = { - [0] = "100kohm_to_gnd", - [1] = "three_state", -}; - -static ssize_t ad5380_read_powerdown_mode(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad5380_state *st = iio_priv(indio_dev); - unsigned int mode; - int ret; - - ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode); - if (ret) - return ret; - - mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1; - - return sprintf(buf, "%s\n", ad5380_powerdown_modes[mode]); -} - -static ssize_t ad5380_write_powerdown_mode(struct device *dev, - struct device_attribute *attr, const char *buf, size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad5380_state *st = iio_priv(indio_dev); - unsigned int i; - int ret; - - for (i = 0; i < ARRAY_SIZE(ad5380_powerdown_modes); ++i) { - if (sysfs_streq(buf, ad5380_powerdown_modes[i])) - break; - } - - if (i == ARRAY_SIZE(ad5380_powerdown_modes)) - return -EINVAL; - - ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL, - 1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET, - i << AD5380_CTRL_PWR_DOWN_MODE_OFFSET); - - return ret ? ret : len; -} - -static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, - S_IRUGO | S_IWUSR, - ad5380_read_powerdown_mode, - ad5380_write_powerdown_mode, 0); - -static IIO_CONST_ATTR(out_voltage_powerdown_mode_available, - "100kohm_to_gnd three_state"); - -static struct attribute *ad5380_attributes[] = { - &iio_dev_attr_out_voltage_powerdown.dev_attr.attr, - &iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr, - &iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad5380_attribute_group = { - .attrs = ad5380_attributes, -}; - -static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan, - long info) -{ - switch (info) { - case 0: - return AD5380_REG_DATA(chan->address); - case IIO_CHAN_INFO_CALIBBIAS: - return AD5380_REG_OFFSET(chan->address); - case IIO_CHAN_INFO_CALIBSCALE: - return AD5380_REG_GAIN(chan->address); - default: - break; - } - - return 0; -} - -static int ad5380_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long info) -{ - const unsigned int max_val = (1 << chan->scan_type.realbits); - struct ad5380_state *st = iio_priv(indio_dev); - - switch (info) { - case IIO_CHAN_INFO_RAW: - case IIO_CHAN_INFO_CALIBSCALE: - if (val >= max_val || val < 0) - return -EINVAL; - - return regmap_write(st->regmap, - ad5380_info_to_reg(chan, info), - val << chan->scan_type.shift); - case IIO_CHAN_INFO_CALIBBIAS: - val += (1 << chan->scan_type.realbits) / 2; - if (val >= max_val || val < 0) - return -EINVAL; - - return regmap_write(st->regmap, - AD5380_REG_OFFSET(chan->address), - val << chan->scan_type.shift); - default: - break; - } - return -EINVAL; -} - -static int ad5380_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int *val, int *val2, long info) -{ - struct ad5380_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - int ret; - - switch (info) { - case IIO_CHAN_INFO_RAW: - case IIO_CHAN_INFO_CALIBSCALE: - ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info), - val); - if (ret) - return ret; - *val >>= chan->scan_type.shift; - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBBIAS: - ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address), - val); - if (ret) - return ret; - *val >>= chan->scan_type.shift; - val -= (1 << chan->scan_type.realbits) / 2; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - scale_uv = ((2 * st->vref) >> chan->scan_type.realbits) * 100; - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - default: - break; - } - - return -EINVAL; -} - -static const struct iio_info ad5380_info = { - .read_raw = ad5380_read_raw, - .write_raw = ad5380_write_raw, - .attrs = &ad5380_attribute_group, - .driver_module = THIS_MODULE, -}; - -static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev) -{ - struct ad5380_state *st = iio_priv(indio_dev); - struct iio_chan_spec *channels; - unsigned int i; - - channels = kcalloc(st->chip_info->num_channels, - sizeof(struct iio_chan_spec), GFP_KERNEL); - - if (!channels) - return -ENOMEM; - - for (i = 0; i < st->chip_info->num_channels; ++i) { - channels[i] = st->chip_info->channel_template; - channels[i].channel = i; - channels[i].address = i; - } - - indio_dev->channels = channels; - - return 0; -} - -static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap, - enum ad5380_type type, const char *name) -{ - struct iio_dev *indio_dev; - struct ad5380_state *st; - unsigned int ctrl = 0; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - dev_err(dev, "Failed to allocate iio device\n"); - ret = -ENOMEM; - goto error_regmap_exit; - } - - st = iio_priv(indio_dev); - dev_set_drvdata(dev, indio_dev); - - st->chip_info = &ad5380_chip_info_tbl[type]; - st->regmap = regmap; - - indio_dev->dev.parent = dev; - indio_dev->name = name; - indio_dev->info = &ad5380_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->num_channels = st->chip_info->num_channels; - - ret = ad5380_alloc_channels(indio_dev); - if (ret) { - dev_err(dev, "Failed to allocate channel spec: %d\n", ret); - goto error_free; - } - - if (st->chip_info->int_vref == 2500000) - ctrl |= AD5380_CTRL_INT_VREF_2V5; - - st->vref_reg = regulator_get(dev, "vref"); - if (!IS_ERR(st->vref_reg)) { - ret = regulator_enable(st->vref_reg); - if (ret) { - dev_err(dev, "Failed to enable vref regulators: %d\n", - ret); - goto error_free_reg; - } - - st->vref = regulator_get_voltage(st->vref_reg); - } else { - st->vref = st->chip_info->int_vref; - ctrl |= AD5380_CTRL_INT_VREF_EN; - } - - ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl); - if (ret) { - dev_err(dev, "Failed to write to device: %d\n", ret); - goto error_disable_reg; - } - - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(dev, "Failed to register iio device: %d\n", ret); - goto error_disable_reg; - } - - return 0; - -error_disable_reg: - if (!IS_ERR(st->vref_reg)) - regulator_disable(st->vref_reg); -error_free_reg: - if (!IS_ERR(st->vref_reg)) - regulator_put(st->vref_reg); - - kfree(indio_dev->channels); -error_free: - iio_device_free(indio_dev); -error_regmap_exit: - regmap_exit(regmap); - - return ret; -} - -static int __devexit ad5380_remove(struct device *dev) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5380_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - kfree(indio_dev->channels); - - if (!IS_ERR(st->vref_reg)) { - regulator_disable(st->vref_reg); - regulator_put(st->vref_reg); - } - - regmap_exit(st->regmap); - iio_device_free(indio_dev); - - return 0; -} - -static bool ad5380_reg_false(struct device *dev, unsigned int reg) -{ - return false; -} - -static const struct regmap_config ad5380_regmap_config = { - .reg_bits = 10, - .val_bits = 14, - - .max_register = AD5380_REG_DATA(40), - .cache_type = REGCACHE_RBTREE, - - .volatile_reg = ad5380_reg_false, - .readable_reg = ad5380_reg_false, -}; - -#if IS_ENABLED(CONFIG_SPI_MASTER) - -static int __devinit ad5380_spi_probe(struct spi_device *spi) -{ - const struct spi_device_id *id = spi_get_device_id(spi); - struct regmap *regmap; - - regmap = regmap_init_spi(spi, &ad5380_regmap_config); - - if (IS_ERR(regmap)) - return PTR_ERR(regmap); - - return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name); -} - -static int __devexit ad5380_spi_remove(struct spi_device *spi) -{ - return ad5380_remove(&spi->dev); -} - -static const struct spi_device_id ad5380_spi_ids[] = { - { "ad5380-3", ID_AD5380_3 }, - { "ad5380-5", ID_AD5380_5 }, - { "ad5381-3", ID_AD5381_3 }, - { "ad5381-5", ID_AD5381_5 }, - { "ad5382-3", ID_AD5382_3 }, - { "ad5382-5", ID_AD5382_5 }, - { "ad5383-3", ID_AD5383_3 }, - { "ad5383-5", ID_AD5383_5 }, - { "ad5384-3", ID_AD5380_3 }, - { "ad5384-5", ID_AD5380_5 }, - { "ad5390-3", ID_AD5390_3 }, - { "ad5390-5", ID_AD5390_5 }, - { "ad5391-3", ID_AD5391_3 }, - { "ad5391-5", ID_AD5391_5 }, - { "ad5392-3", ID_AD5392_3 }, - { "ad5392-5", ID_AD5392_5 }, - { } -}; -MODULE_DEVICE_TABLE(spi, ad5380_spi_ids); - -static struct spi_driver ad5380_spi_driver = { - .driver = { - .name = "ad5380", - .owner = THIS_MODULE, - }, - .probe = ad5380_spi_probe, - .remove = __devexit_p(ad5380_spi_remove), - .id_table = ad5380_spi_ids, -}; - -static inline int ad5380_spi_register_driver(void) -{ - return spi_register_driver(&ad5380_spi_driver); -} - -static inline void ad5380_spi_unregister_driver(void) -{ - spi_unregister_driver(&ad5380_spi_driver); -} - -#else - -static inline int ad5380_spi_register_driver(void) -{ - return 0; -} - -static inline void ad5380_spi_unregister_driver(void) -{ -} - -#endif - -#if IS_ENABLED(CONFIG_I2C) - -static int __devinit ad5380_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) -{ - struct regmap *regmap; - - regmap = regmap_init_i2c(i2c, &ad5380_regmap_config); - - if (IS_ERR(regmap)) - return PTR_ERR(regmap); - - return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name); -} - -static int __devexit ad5380_i2c_remove(struct i2c_client *i2c) -{ - return ad5380_remove(&i2c->dev); -} - -static const struct i2c_device_id ad5380_i2c_ids[] = { - { "ad5380-3", ID_AD5380_3 }, - { "ad5380-5", ID_AD5380_5 }, - { "ad5381-3", ID_AD5381_3 }, - { "ad5381-5", ID_AD5381_5 }, - { "ad5382-3", ID_AD5382_3 }, - { "ad5382-5", ID_AD5382_5 }, - { "ad5383-3", ID_AD5383_3 }, - { "ad5383-5", ID_AD5383_5 }, - { "ad5384-3", ID_AD5380_3 }, - { "ad5384-5", ID_AD5380_5 }, - { "ad5390-3", ID_AD5390_3 }, - { "ad5390-5", ID_AD5390_5 }, - { "ad5391-3", ID_AD5391_3 }, - { "ad5391-5", ID_AD5391_5 }, - { "ad5392-3", ID_AD5392_3 }, - { "ad5392-5", ID_AD5392_5 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids); - -static struct i2c_driver ad5380_i2c_driver = { - .driver = { - .name = "ad5380", - .owner = THIS_MODULE, - }, - .probe = ad5380_i2c_probe, - .remove = __devexit_p(ad5380_i2c_remove), - .id_table = ad5380_i2c_ids, -}; - -static inline int ad5380_i2c_register_driver(void) -{ - return i2c_add_driver(&ad5380_i2c_driver); -} - -static inline void ad5380_i2c_unregister_driver(void) -{ - i2c_del_driver(&ad5380_i2c_driver); -} - -#else - -static inline int ad5380_i2c_register_driver(void) -{ - return 0; -} - -static inline void ad5380_i2c_unregister_driver(void) -{ -} - -#endif - -static int __init ad5380_spi_init(void) -{ - int ret; - - ret = ad5380_spi_register_driver(); - if (ret) - return ret; - - ret = ad5380_i2c_register_driver(); - if (ret) { - ad5380_spi_unregister_driver(); - return ret; - } - - return 0; -} -module_init(ad5380_spi_init); - -static void __exit ad5380_spi_exit(void) -{ - ad5380_i2c_unregister_driver(); - ad5380_spi_unregister_driver(); - -} -module_exit(ad5380_spi_exit); - -MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); -MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC"); -MODULE_LICENSE("GPL v2"); |