diff options
Diffstat (limited to 'drivers/staging/iio/dac')
-rw-r--r-- | drivers/staging/iio/dac/Kconfig | 39 | ||||
-rw-r--r-- | drivers/staging/iio/dac/Makefile | 3 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5064.c | 6 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5360.c | 24 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5380.c | 676 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5421.c | 555 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5421.h | 32 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5446.c | 184 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5446.h | 10 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5504.c | 132 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5504.h | 5 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5624r.h | 4 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5624r_spi.c | 127 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5686.c | 5 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5764.c | 393 | ||||
-rw-r--r-- | drivers/staging/iio/dac/ad5791.c | 15 |
16 files changed, 1959 insertions, 251 deletions
diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig index fac8549..13e2797 100644 --- a/drivers/staging/iio/dac/Kconfig +++ b/drivers/staging/iio/dac/Kconfig @@ -24,6 +24,29 @@ config AD5360 To compile this driver as module choose M here: the module will be called ad5360. +config AD5380 + tristate "Analog Devices AD5380/81/82/83/84/90/91/92 DAC driver" + depends on (SPI_MASTER || I2C) + select REGMAP_I2C if I2C + select REGMAP_SPI if SPI_MASTER + help + Say yes here to build support for Analog Devices AD5380, AD5381, + AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel + Digital to Analog Converters (DAC). + + To compile this driver as module choose M here: the module will be called + ad5380. + +config AD5421 + tristate "Analog Devices AD5421 DAC driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5421 loop-powered + digital-to-analog convertors (DAC). + + To compile this driver as module choose M here: the module will be called + ad5421. + config AD5624R_SPI tristate "Analog Devices AD5624/44/64R DAC spi driver" depends on SPI @@ -37,7 +60,7 @@ config AD5446 help Say yes here to build support for Analog Devices AD5444, AD5446, AD5512A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, AD5621, - AD5640, AD5660 DACs. + AD5640, AD5660, AD5662 DACs. To compile this driver as a module, choose M here: the module will be called ad5446. @@ -52,12 +75,22 @@ config AD5504 To compile this driver as a module, choose M here: the module will be called ad5504. +config AD5764 + tristate "Analog Devices AD5764/64R/44/44R DAC driver" + depends on SPI_MASTER + help + Say yes here to build support for Analog Devices AD5764, AD5764R, AD5744, + AD5744R Digital to Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5764. + config AD5791 - tristate "Analog Devices AD5760/AD5780/AD5781/AD5791 DAC SPI driver" + tristate "Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC SPI driver" depends on SPI help Say yes here to build support for Analog Devices AD5760, AD5780, - AD5781, AD5791 High Resolution Voltage Output Digital to + AD5781, AD5790, AD5791 High Resolution Voltage Output Digital to Analog Converter. To compile this driver as a module, choose M here: the diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile index 07b6f5e..8ab1d26 100644 --- a/drivers/staging/iio/dac/Makefile +++ b/drivers/staging/iio/dac/Makefile @@ -3,10 +3,13 @@ # obj-$(CONFIG_AD5360) += ad5360.o +obj-$(CONFIG_AD5380) += ad5380.o +obj-$(CONFIG_AD5421) += ad5421.o obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o obj-$(CONFIG_AD5064) += ad5064.o obj-$(CONFIG_AD5504) += ad5504.o obj-$(CONFIG_AD5446) += ad5446.o +obj-$(CONFIG_AD5764) += ad5764.o obj-$(CONFIG_AD5791) += ad5791.o obj-$(CONFIG_AD5686) += ad5686.o obj-$(CONFIG_MAX517) += max517.o diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c index 39cfe6c..049a855 100644 --- a/drivers/staging/iio/dac/ad5064.c +++ b/drivers/staging/iio/dac/ad5064.c @@ -91,7 +91,7 @@ enum ad5064_type { .indexed = 1, \ .output = 1, \ .channel = (chan), \ - .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \ + .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ .address = AD5064_ADDR_DAC(chan), \ .scan_type = IIO_ST('u', (bits), 16, 20 - (bits)) \ } @@ -280,14 +280,14 @@ static int ad5064_read_raw(struct iio_dev *indio_dev, long m) { struct ad5064_state *st = iio_priv(indio_dev); - unsigned long scale_uv; unsigned int vref; + int scale_uv; switch (m) { case 0: *val = st->dac_cache[chan->channel]; return IIO_VAL_INT; - case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): + case IIO_CHAN_INFO_SCALE: vref = st->chip_info->shared_vref ? 0 : chan->channel; scale_uv = regulator_get_voltage(st->vref_reg[vref].consumer); if (scale_uv < 0) diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c index bc0459e..710b256af 100644 --- a/drivers/staging/iio/dac/ad5360.c +++ b/drivers/staging/iio/dac/ad5360.c @@ -103,10 +103,10 @@ enum ad5360_type { .type = IIO_VOLTAGE, \ .indexed = 1, \ .output = 1, \ - .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | \ - (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | \ - (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) | \ - (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), \ + .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ .scan_type = IIO_ST('u', (bits), 16, 16 - (bits)) \ } @@ -326,21 +326,21 @@ static int ad5360_write_raw(struct iio_dev *indio_dev, return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA, chan->address, val, chan->scan_type.shift); - case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): + case IIO_CHAN_INFO_CALIBBIAS: if (val >= max_val || val < 0) return -EINVAL; return ad5360_write(indio_dev, AD5360_CMD_WRITE_OFFSET, chan->address, val, chan->scan_type.shift); - case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE): + case IIO_CHAN_INFO_CALIBSCALE: if (val >= max_val || val < 0) return -EINVAL; return ad5360_write(indio_dev, AD5360_CMD_WRITE_GAIN, chan->address, val, chan->scan_type.shift); - case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): + case IIO_CHAN_INFO_OFFSET: if (val <= -max_val || val > 0) return -EINVAL; @@ -371,8 +371,8 @@ static int ad5360_read_raw(struct iio_dev *indio_dev, long m) { struct ad5360_state *st = iio_priv(indio_dev); - unsigned long scale_uv; unsigned int ofs_index; + int scale_uv; int ret; switch (m) { @@ -383,7 +383,7 @@ static int ad5360_read_raw(struct iio_dev *indio_dev, return ret; *val = ret >> chan->scan_type.shift; return IIO_VAL_INT; - case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): + case IIO_CHAN_INFO_SCALE: /* vout = 4 * vref * dac_code */ scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100; if (scale_uv < 0) @@ -393,21 +393,21 @@ static int ad5360_read_raw(struct iio_dev *indio_dev, *val = scale_uv / 100000; *val2 = (scale_uv % 100000) * 10; return IIO_VAL_INT_PLUS_MICRO; - case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): + case IIO_CHAN_INFO_CALIBBIAS: ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET, chan->address); if (ret < 0) return ret; *val = ret; return IIO_VAL_INT; - case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE): + case IIO_CHAN_INFO_CALIBSCALE: ret = ad5360_read(indio_dev, AD5360_READBACK_GAIN, chan->address); if (ret < 0) return ret; *val = ret; return IIO_VAL_INT; - case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): + case IIO_CHAN_INFO_OFFSET: ofs_index = ad5360_get_channel_vref_index(st, chan->channel); ret = ad5360_read(indio_dev, AD5360_READBACK_SF, AD5360_REG_SF_OFS(ofs_index)); diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c new file mode 100644 index 0000000..eff97ae0 --- /dev/null +++ b/drivers/staging/iio/dac/ad5380.c @@ -0,0 +1,676 @@ +/* + * 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 "../iio.h" +#include "../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_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_get_drvdata(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_get_drvdata(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_get_drvdata(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_get_drvdata(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 0: + 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 0: + 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(sizeof(struct iio_chan_spec), + st->chip_info->num_channels, 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_allocate_device(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_free_device(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_free_device(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"); diff --git a/drivers/staging/iio/dac/ad5421.c b/drivers/staging/iio/dac/ad5421.c new file mode 100644 index 0000000..71ee868 --- /dev/null +++ b/drivers/staging/iio/dac/ad5421.c @@ -0,0 +1,555 @@ +/* + * AD5421 Digital to analog converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> + +#include "../iio.h" +#include "../sysfs.h" +#include "../events.h" +#include "dac.h" +#include "ad5421.h" + + +#define AD5421_REG_DAC_DATA 0x1 +#define AD5421_REG_CTRL 0x2 +#define AD5421_REG_OFFSET 0x3 +#define AD5421_REG_GAIN 0x4 +/* load dac and fault shared the same register number. Writing to it will cause + * a dac load command, reading from it will return the fault status register */ +#define AD5421_REG_LOAD_DAC 0x5 +#define AD5421_REG_FAULT 0x5 +#define AD5421_REG_FORCE_ALARM_CURRENT 0x6 +#define AD5421_REG_RESET 0x7 +#define AD5421_REG_START_CONVERSION 0x8 +#define AD5421_REG_NOOP 0x9 + +#define AD5421_CTRL_WATCHDOG_DISABLE BIT(12) +#define AD5421_CTRL_AUTO_FAULT_READBACK BIT(11) +#define AD5421_CTRL_MIN_CURRENT BIT(9) +#define AD5421_CTRL_ADC_SOURCE_TEMP BIT(8) +#define AD5421_CTRL_ADC_ENABLE BIT(7) +#define AD5421_CTRL_PWR_DOWN_INT_VREF BIT(6) + +#define AD5421_FAULT_SPI BIT(15) +#define AD5421_FAULT_PEC BIT(14) +#define AD5421_FAULT_OVER_CURRENT BIT(13) +#define AD5421_FAULT_UNDER_CURRENT BIT(12) +#define AD5421_FAULT_TEMP_OVER_140 BIT(11) +#define AD5421_FAULT_TEMP_OVER_100 BIT(10) +#define AD5421_FAULT_UNDER_VOLTAGE_6V BIT(9) +#define AD5421_FAULT_UNDER_VOLTAGE_12V BIT(8) + +/* These bits will cause the fault pin to go high */ +#define AD5421_FAULT_TRIGGER_IRQ \ + (AD5421_FAULT_SPI | AD5421_FAULT_PEC | AD5421_FAULT_OVER_CURRENT | \ + AD5421_FAULT_UNDER_CURRENT | AD5421_FAULT_TEMP_OVER_140) + +/** + * struct ad5421_state - driver instance specific data + * @spi: spi_device + * @ctrl: control register cache + * @current_range: current range which the device is configured for + * @data: spi transfer buffers + * @fault_mask: software masking of events + */ +struct ad5421_state { + struct spi_device *spi; + unsigned int ctrl; + enum ad5421_current_range current_range; + unsigned int fault_mask; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + u32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +static const struct iio_chan_spec ad5421_channels[] = { + { + .type = IIO_CURRENT, + .indexed = 1, + .output = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .scan_type = IIO_ST('u', 16, 16, 0), + .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + }, + { + .type = IIO_TEMP, + .channel = -1, + .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), + }, +}; + +static int ad5421_write_unlocked(struct iio_dev *indio_dev, + unsigned int reg, unsigned int val) +{ + struct ad5421_state *st = iio_priv(indio_dev); + + st->data[0].d32 = cpu_to_be32((reg << 16) | val); + + return spi_write(st->spi, &st->data[0].d8[1], 3); +} + +static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg, + unsigned int val) +{ + int ret; + + mutex_lock(&indio_dev->mlock); + ret = ad5421_write_unlocked(indio_dev, reg, val); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg) +{ + struct ad5421_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + ret = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set, + unsigned int clr) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int ret; + + mutex_lock(&indio_dev->mlock); + + st->ctrl &= ~clr; + st->ctrl |= set; + + ret = ad5421_write_unlocked(indio_dev, AD5421_REG_CTRL, st->ctrl); + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static irqreturn_t ad5421_fault_handler(int irq, void *data) +{ + struct iio_dev *indio_dev = data; + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int fault; + unsigned int old_fault = 0; + unsigned int events; + + fault = ad5421_read(indio_dev, AD5421_REG_FAULT); + if (!fault) + return IRQ_NONE; + + /* If we had a fault, this might mean that the DAC has lost its state + * and has been reset. Make sure that the control register actually + * contains what we expect it to contain. Otherwise the watchdog might + * be enabled and we get watchdog timeout faults, which will render the + * DAC unusable. */ + ad5421_update_ctrl(indio_dev, 0, 0); + + + /* The fault pin stays high as long as a fault condition is present and + * it is not possible to mask fault conditions. For certain fault + * conditions for example like over-temperature it takes some time + * until the fault condition disappears. If we would exit the interrupt + * handler immediately after handling the event it would be entered + * again instantly. Thus we fall back to polling in case we detect that + * a interrupt condition is still present. + */ + do { + /* 0xffff is a invalid value for the register and will only be + * read if there has been a communication error */ + if (fault == 0xffff) + fault = 0; + + /* we are only interested in new events */ + events = (old_fault ^ fault) & fault; + events &= st->fault_mask; + + if (events & AD5421_FAULT_OVER_CURRENT) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_CURRENT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns()); + } + + if (events & AD5421_FAULT_UNDER_CURRENT) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_CURRENT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns()); + } + + if (events & AD5421_FAULT_TEMP_OVER_140) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, + 0, + IIO_EV_TYPE_MAG, + IIO_EV_DIR_RISING), + iio_get_time_ns()); + } + + old_fault = fault; + fault = ad5421_read(indio_dev, AD5421_REG_FAULT); + + /* still active? go to sleep for some time */ + if (fault & AD5421_FAULT_TRIGGER_IRQ) + msleep(1000); + + } while (fault & AD5421_FAULT_TRIGGER_IRQ); + + + return IRQ_HANDLED; +} + +static void ad5421_get_current_min_max(struct ad5421_state *st, + unsigned int *min, unsigned int *max) +{ + /* The current range is configured using external pins, which are + * usually hard-wired and not run-time switchable. */ + switch (st->current_range) { + case AD5421_CURRENT_RANGE_4mA_20mA: + *min = 4000; + *max = 20000; + break; + case AD5421_CURRENT_RANGE_3mA8_21mA: + *min = 3800; + *max = 21000; + break; + case AD5421_CURRENT_RANGE_3mA2_24mA: + *min = 3200; + *max = 24000; + break; + default: + *min = 0; + *max = 1; + break; + } +} + +static inline unsigned int ad5421_get_offset(struct ad5421_state *st) +{ + unsigned int min, max; + + ad5421_get_current_min_max(st, &min, &max); + return (min * (1 << 16)) / (max - min); +} + +static inline unsigned int ad5421_get_scale(struct ad5421_state *st) +{ + unsigned int min, max; + + ad5421_get_current_min_max(st, &min, &max); + return ((max - min) * 1000) / (1 << 16); +} + +static int ad5421_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long m) +{ + struct ad5421_state *st = iio_priv(indio_dev); + int ret; + + if (chan->type != IIO_CURRENT) + return -EINVAL; + + switch (m) { + case 0: + ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = ad5421_get_scale(st); + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = ad5421_get_offset(st); + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + ret = ad5421_read(indio_dev, AD5421_REG_OFFSET); + if (ret < 0) + return ret; + *val = ret - 32768; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + ret = ad5421_read(indio_dev, AD5421_REG_GAIN); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static int ad5421_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + const unsigned int max_val = 1 << 16; + + switch (mask) { + case 0: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_DAC_DATA, val); + case IIO_CHAN_INFO_CALIBBIAS: + val += 32768; + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_OFFSET, val); + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_GAIN, val); + default: + break; + } + + return -EINVAL; +} + +static int ad5421_write_event_config(struct iio_dev *indio_dev, + u64 event_code, int state) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int mask; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == + IIO_EV_DIR_RISING) + mask = AD5421_FAULT_OVER_CURRENT; + else + mask = AD5421_FAULT_UNDER_CURRENT; + break; + case IIO_TEMP: + mask = AD5421_FAULT_TEMP_OVER_140; + break; + default: + return -EINVAL; + } + + mutex_lock(&indio_dev->mlock); + if (state) + st->fault_mask |= mask; + else + st->fault_mask &= ~mask; + mutex_unlock(&indio_dev->mlock); + + return 0; +} + +static int ad5421_read_event_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int mask; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == + IIO_EV_DIR_RISING) + mask = AD5421_FAULT_OVER_CURRENT; + else + mask = AD5421_FAULT_UNDER_CURRENT; + break; + case IIO_TEMP: + mask = AD5421_FAULT_TEMP_OVER_140; + break; + default: + return -EINVAL; + } + + return (bool)(st->fault_mask & mask); +} + +static int ad5421_read_event_value(struct iio_dev *indio_dev, u64 event_code, + int *val) +{ + int ret; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); + if (ret < 0) + return ret; + *val = ret; + break; + case IIO_TEMP: + *val = 140000; + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct iio_info ad5421_info = { + .read_raw = ad5421_read_raw, + .write_raw = ad5421_write_raw, + .read_event_config = ad5421_read_event_config, + .write_event_config = ad5421_write_event_config, + .read_event_value = ad5421_read_event_value, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5421_probe(struct spi_device *spi) +{ + struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev); + struct iio_dev *indio_dev; + struct ad5421_state *st; + int ret; + + indio_dev = iio_allocate_device(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = "ad5421"; + indio_dev->info = &ad5421_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = ad5421_channels; + indio_dev->num_channels = ARRAY_SIZE(ad5421_channels); + + st->ctrl = AD5421_CTRL_WATCHDOG_DISABLE | + AD5421_CTRL_AUTO_FAULT_READBACK; + + if (pdata) { + st->current_range = pdata->current_range; + if (pdata->external_vref) + st->ctrl |= AD5421_CTRL_PWR_DOWN_INT_VREF; + } else { + st->current_range = AD5421_CURRENT_RANGE_4mA_20mA; + } + + /* write initial ctrl register value */ + ad5421_update_ctrl(indio_dev, 0, 0); + + if (spi->irq) { + ret = request_threaded_irq(spi->irq, + NULL, + ad5421_fault_handler, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "ad5421 fault", + indio_dev); + if (ret) + goto error_free; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_free_irq; + } + + return 0; + +error_free_irq: + if (spi->irq) + free_irq(spi->irq, indio_dev); +error_free: + iio_free_device(indio_dev); + + return ret; +} + +static int __devexit ad5421_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + + iio_device_unregister(indio_dev); + if (spi->irq) + free_irq(spi->irq, indio_dev); + iio_free_device(indio_dev); + + return 0; +} + +static struct spi_driver ad5421_driver = { + .driver = { + .name = "ad5421", + .owner = THIS_MODULE, + }, + .probe = ad5421_probe, + .remove = __devexit_p(ad5421_remove), +}; + +static __init int ad5421_init(void) +{ + return spi_register_driver(&ad5421_driver); +} +module_init(ad5421_init); + +static __exit void ad5421_exit(void) +{ + spi_unregister_driver(&ad5421_driver); +} +module_exit(ad5421_exit); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices AD5421 DAC"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("spi:ad5421"); diff --git a/drivers/staging/iio/dac/ad5421.h b/drivers/staging/iio/dac/ad5421.h new file mode 100644 index 0000000..cd2bb84 --- /dev/null +++ b/drivers/staging/iio/dac/ad5421.h @@ -0,0 +1,32 @@ +#ifndef __IIO_DAC_AD5421_H__ +#define __IIO_DAC_AD5421_H__ + +/* + * TODO: This file needs to go into include/linux/iio + */ + +/** + * enum ad5421_current_range - Current range the AD5421 is configured for. + * @AD5421_CURRENT_RANGE_4mA_20mA: 4 mA to 20 mA (RANGE1,0 pins = 00) + * @AD5421_CURRENT_RANGE_3mA8_21mA: 3.8 mA to 21 mA (RANGE1,0 pins = x1) + * @AD5421_CURRENT_RANGE_3mA2_24mA: 3.2 mA to 24 mA (RANGE1,0 pins = 10) + */ + +enum ad5421_current_range { + AD5421_CURRENT_RANGE_4mA_20mA, + AD5421_CURRENT_RANGE_3mA8_21mA, + AD5421_CURRENT_RANGE_3mA2_24mA, +}; + +/** + * struct ad5421_platform_data - AD5421 DAC driver platform data + * @external_vref: whether an external reference voltage is used or not + * @current_range: Current range the AD5421 is configured for + */ + +struct ad5421_platform_data { + bool external_vref; + enum ad5421_current_range current_range; +}; + +#endif diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c index ec701e9..693e748 100644 --- a/drivers/staging/iio/dac/ad5446.c +++ b/drivers/staging/iio/dac/ad5446.c @@ -26,19 +26,17 @@ static void ad5446_store_sample(struct ad5446_state *st, unsigned val) { - st->data.d16 = cpu_to_be16(AD5446_LOAD | - (val << st->chip_info->left_shift)); + st->data.d16 = cpu_to_be16(AD5446_LOAD | val); } static void ad5542_store_sample(struct ad5446_state *st, unsigned val) { - st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift); + st->data.d16 = cpu_to_be16(val); } static void ad5620_store_sample(struct ad5446_state *st, unsigned val) { - st->data.d16 = cpu_to_be16(AD5620_LOAD | - (val << st->chip_info->left_shift)); + st->data.d16 = cpu_to_be16(AD5620_LOAD | val); } static void ad5660_store_sample(struct ad5446_state *st, unsigned val) @@ -63,50 +61,6 @@ static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode) st->data.d24[2] = val & 0xFF; } -static ssize_t ad5446_write(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5446_state *st = iio_priv(indio_dev); - int ret; - long val; - - ret = strict_strtol(buf, 10, &val); - if (ret) - goto error_ret; - - if (val > RES_MASK(st->chip_info->bits)) { - ret = -EINVAL; - goto error_ret; - } - - mutex_lock(&indio_dev->mlock); - st->cached_val = val; - st->chip_info->store_sample(st, val); - ret = spi_sync(st->spi, &st->msg); - mutex_unlock(&indio_dev->mlock); - -error_ret: - return ret ? ret : len; -} - -static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0); - -static ssize_t ad5446_show_scale(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5446_state *st = iio_priv(indio_dev); - /* Corresponds to Vref / 2^(bits) */ - unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits; - - return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000); -} -static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5446_show_scale, NULL, 0); - static ssize_t ad5446_write_powerdown_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) @@ -189,8 +143,6 @@ static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR, ad5446_write_dac_powerdown, 0); static struct attribute *ad5446_attributes[] = { - &iio_dev_attr_out_voltage0_raw.dev_attr.attr, - &iio_dev_attr_out_voltage_scale.dev_attr.attr, &iio_dev_attr_out_voltage0_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, @@ -223,121 +175,148 @@ static const struct attribute_group ad5446_attribute_group = { .is_visible = ad5446_attr_is_visible, }; +#define AD5446_CHANNEL(bits, storage, shift) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .scan_type = IIO_ST('u', (bits), (storage), (shift)) \ +} + static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { [ID_AD5444] = { - .bits = 12, - .storagebits = 16, - .left_shift = 2, + .channel = AD5446_CHANNEL(12, 16, 2), .store_sample = ad5446_store_sample, }, [ID_AD5446] = { - .bits = 14, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(14, 16, 0), .store_sample = ad5446_store_sample, }, [ID_AD5541A] = { - .bits = 16, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(16, 16, 0), .store_sample = ad5542_store_sample, }, [ID_AD5542A] = { - .bits = 16, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(16, 16, 0), .store_sample = ad5542_store_sample, }, [ID_AD5543] = { - .bits = 16, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(16, 16, 0), .store_sample = ad5542_store_sample, }, [ID_AD5512A] = { - .bits = 12, - .storagebits = 16, - .left_shift = 4, + .channel = AD5446_CHANNEL(12, 16, 4), .store_sample = ad5542_store_sample, }, [ID_AD5553] = { - .bits = 14, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(14, 16, 0), .store_sample = ad5542_store_sample, }, [ID_AD5601] = { - .bits = 8, - .storagebits = 16, - .left_shift = 6, + .channel = AD5446_CHANNEL(8, 16, 6), .store_sample = ad5542_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5611] = { - .bits = 10, - .storagebits = 16, - .left_shift = 4, + .channel = AD5446_CHANNEL(10, 16, 4), .store_sample = ad5542_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5621] = { - .bits = 12, - .storagebits = 16, - .left_shift = 2, + .channel = AD5446_CHANNEL(12, 16, 2), .store_sample = ad5542_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5620_2500] = { - .bits = 12, - .storagebits = 16, - .left_shift = 2, + .channel = AD5446_CHANNEL(12, 16, 2), .int_vref_mv = 2500, .store_sample = ad5620_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5620_1250] = { - .bits = 12, - .storagebits = 16, - .left_shift = 2, + .channel = AD5446_CHANNEL(12, 16, 2), .int_vref_mv = 1250, .store_sample = ad5620_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5640_2500] = { - .bits = 14, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(14, 16, 0), .int_vref_mv = 2500, .store_sample = ad5620_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5640_1250] = { - .bits = 14, - .storagebits = 16, - .left_shift = 0, + .channel = AD5446_CHANNEL(14, 16, 0), .int_vref_mv = 1250, .store_sample = ad5620_store_sample, .store_pwr_down = ad5620_store_pwr_down, }, [ID_AD5660_2500] = { - .bits = 16, - .storagebits = 24, - .left_shift = 0, + .channel = AD5446_CHANNEL(16, 16, 0), .int_vref_mv = 2500, .store_sample = ad5660_store_sample, .store_pwr_down = ad5660_store_pwr_down, }, [ID_AD5660_1250] = { - .bits = 16, - .storagebits = 24, - .left_shift = 0, + .channel = AD5446_CHANNEL(16, 16, 0), .int_vref_mv = 1250, .store_sample = ad5660_store_sample, .store_pwr_down = ad5660_store_pwr_down, }, }; +static int ad5446_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5446_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + + switch (m) { + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; +} + +static int ad5446_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5446_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case 0: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + val <<= chan->scan_type.shift; + mutex_lock(&indio_dev->mlock); + st->cached_val = val; + st->chip_info->store_sample(st, val); + ret = spi_sync(st->spi, &st->msg); + mutex_unlock(&indio_dev->mlock); + break; + default: + ret = -EINVAL; + } + + return ret; +} + static const struct iio_info ad5446_info = { + .read_raw = ad5446_read_raw, + .write_raw = ad5446_write_raw, .attrs = &ad5446_attribute_group, .driver_module = THIS_MODULE, }; @@ -376,11 +355,13 @@ static int __devinit ad5446_probe(struct spi_device *spi) indio_dev->name = spi_get_device_id(spi)->name; indio_dev->info = &ad5446_info; indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = &st->chip_info->channel; + indio_dev->num_channels = 1; /* Setup default message */ st->xfer.tx_buf = &st->data; - st->xfer.len = st->chip_info->storagebits / 8; + st->xfer.len = st->chip_info->channel.scan_type.storagebits / 8; spi_message_init(&st->msg); spi_message_add_tail(&st->xfer, &st->msg); @@ -454,11 +435,11 @@ static const struct spi_device_id ad5446_id[] = { {"ad5660-1250", ID_AD5660_1250}, {} }; +MODULE_DEVICE_TABLE(spi, ad5446_id); static struct spi_driver ad5446_driver = { .driver = { .name = "ad5446", - .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = ad5446_probe, @@ -470,4 +451,3 @@ module_spi_driver(ad5446_driver); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC"); MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:ad5446"); diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h index 7118d65..4ea3476 100644 --- a/drivers/staging/iio/dac/ad5446.h +++ b/drivers/staging/iio/dac/ad5446.h @@ -25,8 +25,6 @@ #define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */ #define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */ -#define RES_MASK(bits) ((1 << (bits)) - 1) - #define MODE_PWRDWN_1k 0x1 #define MODE_PWRDWN_100k 0x2 #define MODE_PWRDWN_TRISTATE 0x3 @@ -62,18 +60,14 @@ struct ad5446_state { /** * struct ad5446_chip_info - chip specific information - * @bits: accuracy of the DAC in bits - * @storagebits: number of bits written to the DAC - * @left_shift: number of bits the datum must be shifted + * @channel: channel spec for the DAC * @int_vref_mv: AD5620/40/60: the internal reference voltage * @store_sample: chip specific helper function to store the datum * @store_sample: chip specific helper function to store the powerpown cmd */ struct ad5446_chip_info { - u8 bits; - u8 storagebits; - u8 left_shift; + struct iio_chan_spec channel; u16 int_vref_mv; void (*store_sample) (struct ad5446_state *st, unsigned val); void (*store_pwr_down) (struct ad5446_state *st, unsigned mode); diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c index 57539ce..bc17205 100644 --- a/drivers/staging/iio/dac/ad5504.c +++ b/drivers/staging/iio/dac/ad5504.c @@ -18,9 +18,27 @@ #include "../iio.h" #include "../sysfs.h" +#include "../events.h" #include "dac.h" #include "ad5504.h" +#define AD5504_CHANNEL(_chan) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = AD5504_ADDR_DAC(_chan), \ + .scan_type = IIO_ST('u', 12, 16, 0), \ +} + +static const struct iio_chan_spec ad5504_channels[] = { + AD5504_CHANNEL(0), + AD5504_CHANNEL(1), + AD5504_CHANNEL(2), + AD5504_CHANNEL(3), +}; + static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val) { u16 tmp = cpu_to_be16(AD5504_CMD_WRITE | @@ -30,13 +48,14 @@ static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val) return spi_write(spi, (u8 *)&tmp, 2); } -static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val) +static int ad5504_spi_read(struct spi_device *spi, u8 addr) { u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr)); + u16 val; int ret; struct spi_transfer t = { .tx_buf = &tmp, - .rx_buf = val, + .rx_buf = &val, .len = 2, }; struct spi_message m; @@ -45,44 +64,61 @@ static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val) spi_message_add_tail(&t, &m); ret = spi_sync(spi, &m); - *val = be16_to_cpu(*val) & AD5504_RES_MASK; + if (ret < 0) + return ret; - return ret; + return be16_to_cpu(val) & AD5504_RES_MASK; } -static ssize_t ad5504_write_dac(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static int ad5504_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) { - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5504_state *st = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - long readin; + unsigned long scale_uv; int ret; - ret = strict_strtol(buf, 10, &readin); - if (ret) - return ret; + switch (m) { + case 0: + ret = ad5504_spi_read(st->spi, chan->address); + if (ret < 0) + return ret; - ret = ad5504_spi_write(st->spi, this_attr->address, readin); - return ret ? ret : len; + *val = ret; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; } -static ssize_t ad5504_read_dac(struct device *dev, - struct device_attribute *attr, - char *buf) +static int ad5504_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) { - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5504_state *st = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int ret; - u16 val; - ret = ad5504_spi_read(st->spi, this_attr->address, &val); - if (ret) - return ret; + switch (mask) { + case 0: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; - return sprintf(buf, "%d\n", val); + return ad5504_spi_write(st->spi, chan->address, val); + default: + ret = -EINVAL; + } + + return -EINVAL; } static ssize_t ad5504_read_powerdown_mode(struct device *dev, @@ -157,32 +193,6 @@ static ssize_t ad5504_write_dac_powerdown(struct device *dev, return ret ? ret : len; } -static ssize_t ad5504_show_scale(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5504_state *st = iio_priv(indio_dev); - /* Corresponds to Vref / 2^(bits) */ - unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS; - - return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000); -} -static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5504_show_scale, NULL, 0); - -#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \ - IIO_DEVICE_ATTR(out_voltage##_num##_raw, \ - S_IRUGO | S_IWUSR, _show, _store, _addr) - -static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac, - ad5504_write_dac, AD5504_ADDR_DAC0); -static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac, - ad5504_write_dac, AD5504_ADDR_DAC1); -static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac, - ad5504_write_dac, AD5504_ADDR_DAC2); -static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac, - ad5504_write_dac, AD5504_ADDR_DAC3); - static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | S_IWUSR, ad5504_read_powerdown_mode, ad5504_write_powerdown_mode, 0); @@ -203,17 +213,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown, ad5504_write_dac_powerdown, 3); static struct attribute *ad5504_attributes[] = { - &iio_dev_attr_out_voltage0_raw.dev_attr.attr, - &iio_dev_attr_out_voltage1_raw.dev_attr.attr, - &iio_dev_attr_out_voltage2_raw.dev_attr.attr, - &iio_dev_attr_out_voltage3_raw.dev_attr.attr, &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage1_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage2_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage3_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, - &iio_dev_attr_out_voltage_scale.dev_attr.attr, NULL, }; @@ -222,11 +227,9 @@ static const struct attribute_group ad5504_attribute_group = { }; static struct attribute *ad5501_attributes[] = { - &iio_dev_attr_out_voltage0_raw.dev_attr.attr, &iio_dev_attr_out_voltage0_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, - &iio_dev_attr_out_voltage_scale.dev_attr.attr, NULL, }; @@ -261,12 +264,16 @@ static irqreturn_t ad5504_event_handler(int irq, void *private) } static const struct iio_info ad5504_info = { + .write_raw = ad5504_write_raw, + .read_raw = ad5504_read_raw, .attrs = &ad5504_attribute_group, .event_attrs = &ad5504_ev_attribute_group, .driver_module = THIS_MODULE, }; static const struct iio_info ad5501_info = { + .write_raw = ad5504_write_raw, + .read_raw = ad5504_read_raw, .attrs = &ad5501_attribute_group, .event_attrs = &ad5504_ev_attribute_group, .driver_module = THIS_MODULE, @@ -307,10 +314,14 @@ static int __devinit ad5504_probe(struct spi_device *spi) st->spi = spi; indio_dev->dev.parent = &spi->dev; indio_dev->name = spi_get_device_id(st->spi)->name; - if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) + if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) { indio_dev->info = &ad5501_info; - else + indio_dev->num_channels = 1; + } else { indio_dev->info = &ad5504_info; + indio_dev->num_channels = 4; + } + indio_dev->channels = ad5504_channels; indio_dev->modes = INDIO_DIRECT_MODE; if (spi->irq) { @@ -367,6 +378,7 @@ static const struct spi_device_id ad5504_id[] = { {"ad5501", ID_AD5501}, {} }; +MODULE_DEVICE_TABLE(spi, ad5504_id); static struct spi_driver ad5504_driver = { .driver = { diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h index 85beb1d..afe0952 100644 --- a/drivers/staging/iio/dac/ad5504.h +++ b/drivers/staging/iio/dac/ad5504.h @@ -18,10 +18,7 @@ /* Registers */ #define AD5504_ADDR_NOOP 0 -#define AD5504_ADDR_DAC0 1 -#define AD5504_ADDR_DAC1 2 -#define AD5504_ADDR_DAC2 3 -#define AD5504_ADDR_DAC3 4 +#define AD5504_ADDR_DAC(x) ((x) + 1) #define AD5504_ADDR_ALL_DAC 5 #define AD5504_ADDR_CTRL 7 diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h index b71c6a0..5dca302 100644 --- a/drivers/staging/iio/dac/ad5624r.h +++ b/drivers/staging/iio/dac/ad5624r.h @@ -32,12 +32,12 @@ /** * struct ad5624r_chip_info - chip specific information - * @bits: accuracy of the DAC in bits + * @channels: channel spec for the DAC * @int_vref_mv: AD5620/40/60: the internal reference voltage */ struct ad5624r_chip_info { - u8 bits; + const struct iio_chan_spec *channels; u16 int_vref_mv; }; diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c index 6e05f0d..10c7484 100644 --- a/drivers/staging/iio/dac/ad5624r_spi.c +++ b/drivers/staging/iio/dac/ad5624r_spi.c @@ -21,29 +21,51 @@ #include "dac.h" #include "ad5624r.h" +#define AD5624R_CHANNEL(_chan, _bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = (_chan), \ + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ +} + +#define DECLARE_AD5624R_CHANNELS(_name, _bits) \ + const struct iio_chan_spec _name##_channels[] = { \ + AD5624R_CHANNEL(0, _bits), \ + AD5624R_CHANNEL(1, _bits), \ + AD5624R_CHANNEL(2, _bits), \ + AD5624R_CHANNEL(3, _bits), \ +} + +static DECLARE_AD5624R_CHANNELS(ad5624r, 12); +static DECLARE_AD5624R_CHANNELS(ad5644r, 14); +static DECLARE_AD5624R_CHANNELS(ad5664r, 16); + static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { [ID_AD5624R3] = { - .bits = 12, - .int_vref_mv = 1250, - }, - [ID_AD5644R3] = { - .bits = 14, - .int_vref_mv = 1250, - }, - [ID_AD5664R3] = { - .bits = 16, + .channels = ad5624r_channels, .int_vref_mv = 1250, }, [ID_AD5624R5] = { - .bits = 12, + .channels = ad5624r_channels, .int_vref_mv = 2500, }, + [ID_AD5644R3] = { + .channels = ad5644r_channels, + .int_vref_mv = 1250, + }, [ID_AD5644R5] = { - .bits = 14, + .channels = ad5644r_channels, .int_vref_mv = 2500, }, + [ID_AD5664R3] = { + .channels = ad5664r_channels, + .int_vref_mv = 1250, + }, [ID_AD5664R5] = { - .bits = 16, + .channels = ad5664r_channels, .int_vref_mv = 2500, }, }; @@ -70,24 +92,49 @@ static int ad5624r_spi_write(struct spi_device *spi, return spi_write(spi, msg, 3); } -static ssize_t ad5624r_write_dac(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static int ad5624r_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) { - long readin; - int ret; - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5624r_state *st = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + unsigned long scale_uv; - ret = strict_strtol(buf, 10, &readin); - if (ret) - return ret; + switch (m) { + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; - ret = ad5624r_spi_write(st->us, AD5624R_CMD_WRITE_INPUT_N_UPDATE_N, - this_attr->address, readin, - st->chip_info->bits); - return ret ? ret : len; + } + return -EINVAL; +} + +static int ad5624r_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case 0: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + return ad5624r_spi_write(st->us, + AD5624R_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, val, + chan->scan_type.shift); + default: + ret = -EINVAL; + } + + return -EINVAL; } static ssize_t ad5624r_read_powerdown_mode(struct device *dev, @@ -161,24 +208,6 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev, return ret ? ret : len; } -static ssize_t ad5624r_show_scale(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5624r_state *st = iio_priv(indio_dev); - /* Corresponds to Vref / 2^(bits) */ - unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits; - - return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000); -} -static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5624r_show_scale, NULL, 0); - -static IIO_DEV_ATTR_OUT_RAW(0, ad5624r_write_dac, AD5624R_ADDR_DAC0); -static IIO_DEV_ATTR_OUT_RAW(1, ad5624r_write_dac, AD5624R_ADDR_DAC1); -static IIO_DEV_ATTR_OUT_RAW(2, ad5624r_write_dac, AD5624R_ADDR_DAC2); -static IIO_DEV_ATTR_OUT_RAW(3, ad5624r_write_dac, AD5624R_ADDR_DAC3); - static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | S_IWUSR, ad5624r_read_powerdown_mode, ad5624r_write_powerdown_mode, 0); @@ -200,17 +229,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5624r_read_dac_powerdown, ad5624r_write_dac_powerdown, 3); static struct attribute *ad5624r_attributes[] = { - &iio_dev_attr_out_voltage0_raw.dev_attr.attr, - &iio_dev_attr_out_voltage1_raw.dev_attr.attr, - &iio_dev_attr_out_voltage2_raw.dev_attr.attr, - &iio_dev_attr_out_voltage3_raw.dev_attr.attr, &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage1_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage2_powerdown.dev_attr.attr, &iio_dev_attr_out_voltage3_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, - &iio_dev_attr_out_voltage_scale.dev_attr.attr, NULL, }; @@ -219,6 +243,8 @@ static const struct attribute_group ad5624r_attribute_group = { }; static const struct iio_info ad5624r_info = { + .write_raw = ad5624r_write_raw, + .read_raw = ad5624r_read_raw, .attrs = &ad5624r_attribute_group, .driver_module = THIS_MODULE, }; @@ -259,6 +285,8 @@ static int __devinit ad5624r_probe(struct spi_device *spi) indio_dev->name = spi_get_device_id(spi)->name; indio_dev->info = &ad5624r_info; indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = AD5624R_DAC_CHANNELS; ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0, !!voltage_uv, 16); @@ -307,6 +335,7 @@ static const struct spi_device_id ad5624r_id[] = { {"ad5664r5", ID_AD5664R5}, {} }; +MODULE_DEVICE_TABLE(spi, ad5624r_id); static struct spi_driver ad5624r_driver = { .driver = { diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c index e72db2f..ce2d619 100644 --- a/drivers/staging/iio/dac/ad5686.c +++ b/drivers/staging/iio/dac/ad5686.c @@ -99,7 +99,7 @@ enum ad5686_supported_device_ids { .indexed = 1, \ .output = 1, \ .channel = chan, \ - .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED), \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ .address = AD5686_ADDR_DAC(chan), \ .scan_type = IIO_ST('u', bits, 16, shift) \ } @@ -306,7 +306,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, *val = ret; return IIO_VAL_INT; break; - case (1 << IIO_CHAN_INFO_SCALE_SHARED): + case IIO_CHAN_INFO_SCALE: scale_uv = (st->vref_mv * 100000) >> (chan->scan_type.realbits); *val = scale_uv / 100000; @@ -437,6 +437,7 @@ static const struct spi_device_id ad5686_id[] = { {"ad5686", ID_AD5686}, {} }; +MODULE_DEVICE_TABLE(spi, ad5686_id); static struct spi_driver ad5686_driver = { .driver = { diff --git a/drivers/staging/iio/dac/ad5764.c b/drivers/staging/iio/dac/ad5764.c new file mode 100644 index 0000000..ff91480 --- /dev/null +++ b/drivers/staging/iio/dac/ad5764.c @@ -0,0 +1,393 @@ +/* + * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-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/module.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/regulator/consumer.h> + +#include "../iio.h" +#include "../sysfs.h" +#include "dac.h" + +#define AD5764_REG_SF_NOP 0x0 +#define AD5764_REG_SF_CONFIG 0x1 +#define AD5764_REG_SF_CLEAR 0x4 +#define AD5764_REG_SF_LOAD 0x5 +#define AD5764_REG_DATA(x) ((2 << 3) | (x)) +#define AD5764_REG_COARSE_GAIN(x) ((3 << 3) | (x)) +#define AD5764_REG_FINE_GAIN(x) ((4 << 3) | (x)) +#define AD5764_REG_OFFSET(x) ((5 << 3) | (x)) + +#define AD5764_NUM_CHANNELS 4 + +/** + * struct ad5764_chip_info - chip specific information + * @int_vref: Value of the internal reference voltage in uV - 0 if external + * reference voltage is used + * @channel channel specification +*/ + +struct ad5764_chip_info { + unsigned long int_vref; + const struct iio_chan_spec *channels; +}; + +/** + * struct ad5764_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip info + * @vref_reg: vref supply regulators + * @data: spi transfer buffers + */ + +struct ad5764_state { + struct spi_device *spi; + const struct ad5764_chip_info *chip_info; + struct regulator_bulk_data vref_reg[2]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + __be32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +enum ad5764_type { + ID_AD5744, + ID_AD5744R, + ID_AD5764, + ID_AD5764R, +}; + +#define AD5764_CHANNEL(_chan, _bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .address = (_chan), \ + .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)) \ +} + +#define DECLARE_AD5764_CHANNELS(_name, _bits) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD5764_CHANNEL(0, (_bits)), \ + AD5764_CHANNEL(1, (_bits)), \ + AD5764_CHANNEL(2, (_bits)), \ + AD5764_CHANNEL(3, (_bits)), \ +}; + +static DECLARE_AD5764_CHANNELS(ad5764, 16); +static DECLARE_AD5764_CHANNELS(ad5744, 14); + +static const struct ad5764_chip_info ad5764_chip_infos[] = { + [ID_AD5744] = { + .int_vref = 0, + .channels = ad5744_channels, + }, + [ID_AD5744R] = { + .int_vref = 5000000, + .channels = ad5744_channels, + }, + [ID_AD5764] = { + .int_vref = 0, + .channels = ad5764_channels, + }, + [ID_AD5764R] = { + .int_vref = 5000000, + .channels = ad5764_channels, + }, +}; + +static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg, + unsigned int val) +{ + struct ad5764_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&indio_dev->mlock); + st->data[0].d32 = cpu_to_be32((reg << 16) | val); + + ret = spi_write(st->spi, &st->data[0].d8[1], 3); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg, + unsigned int *val) +{ + struct ad5764_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + *val = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info) +{ + switch (info) { + case 0: + return AD5764_REG_DATA(chan->address); + case IIO_CHAN_INFO_CALIBBIAS: + return AD5764_REG_OFFSET(chan->address); + case IIO_CHAN_INFO_CALIBSCALE: + return AD5764_REG_FINE_GAIN(chan->address); + default: + break; + } + + return 0; +} + +static int ad5764_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long info) +{ + const int max_val = (1 << chan->scan_type.realbits); + unsigned int reg; + + switch (info) { + case 0: + if (val >= max_val || val < 0) + return -EINVAL; + val <<= chan->scan_type.shift; + break; + case IIO_CHAN_INFO_CALIBBIAS: + if (val >= 128 || val < -128) + return -EINVAL; + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= 32 || val < -32) + return -EINVAL; + break; + default: + return -EINVAL; + } + + reg = ad5764_chan_info_to_reg(chan, info); + return ad5764_write(indio_dev, reg, (u16)val); +} + +static int ad5764_get_channel_vref(struct ad5764_state *st, + unsigned int channel) +{ + if (st->chip_info->int_vref) + return st->chip_info->int_vref; + else + return regulator_get_voltage(st->vref_reg[channel / 2].consumer); +} + +static int ad5764_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long info) +{ + struct ad5764_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + unsigned int reg; + int vref; + int ret; + + switch (info) { + case 0: + reg = AD5764_REG_DATA(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val >>= chan->scan_type.shift; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + reg = AD5764_REG_OFFSET(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val = sign_extend32(*val, 7); + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + reg = AD5764_REG_FINE_GAIN(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val = sign_extend32(*val, 5); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + /* vout = 4 * vref + ((dac_code / 65535) - 0.5) */ + vref = ad5764_get_channel_vref(st, chan->channel); + if (vref < 0) + return vref; + + scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits; + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = -(1 << chan->scan_type.realbits) / 2; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static const struct iio_info ad5764_info = { + .read_raw = ad5764_read_raw, + .write_raw = ad5764_write_raw, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5764_probe(struct spi_device *spi) +{ + enum ad5764_type type = spi_get_device_id(spi)->driver_data; + struct iio_dev *indio_dev; + struct ad5764_state *st; + int ret; + + indio_dev = iio_allocate_device(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + st->chip_info = &ad5764_chip_infos[type]; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5764_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->num_channels = AD5764_NUM_CHANNELS; + indio_dev->channels = st->chip_info->channels; + + if (st->chip_info->int_vref == 0) { + st->vref_reg[0].supply = "vrefAB"; + st->vref_reg[1].supply = "vrefCD"; + + ret = regulator_bulk_get(&st->spi->dev, + ARRAY_SIZE(st->vref_reg), st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to request vref regulators: %d\n", + ret); + goto error_free; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg), + st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", + ret); + goto error_free_reg; + } + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_disable_reg; + } + + return 0; + +error_disable_reg: + if (st->chip_info->int_vref == 0) + regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); +error_free_reg: + if (st->chip_info->int_vref == 0) + regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); +error_free: + iio_free_device(indio_dev); + + return ret; +} + +static int __devexit ad5764_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5764_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + if (st->chip_info->int_vref == 0) { + regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); + regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); + } + + iio_free_device(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5764_ids[] = { + { "ad5744", ID_AD5744 }, + { "ad5744r", ID_AD5744R }, + { "ad5764", ID_AD5764 }, + { "ad5764r", ID_AD5764R }, + { } +}; +MODULE_DEVICE_TABLE(spi, ad5764_ids); + +static struct spi_driver ad5764_driver = { + .driver = { + .name = "ad5764", + .owner = THIS_MODULE, + }, + .probe = ad5764_probe, + .remove = __devexit_p(ad5764_remove), + .id_table = ad5764_ids, +}; + +static int __init ad5764_spi_init(void) +{ + return spi_register_driver(&ad5764_driver); +} +module_init(ad5764_spi_init); + +static void __exit ad5764_spi_exit(void) +{ + spi_unregister_driver(&ad5764_driver); +} +module_exit(ad5764_spi_exit); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c index 4a80fd8..ac45636 100644 --- a/drivers/staging/iio/dac/ad5791.c +++ b/drivers/staging/iio/dac/ad5791.c @@ -1,5 +1,6 @@ /* - * AD5760, AD5780, AD5781, AD5791 Voltage Output Digital to Analog Converter + * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output Digital to Analog + * Converter * * Copyright 2011 Analog Devices Inc. * @@ -77,8 +78,8 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) .indexed = 1, \ .address = AD5791_ADDR_DAC0, \ .channel = 0, \ - .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED) | \ - (1 << IIO_CHAN_INFO_OFFSET_SHARED), \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ .scan_type = IIO_ST('u', bits, 24, shift) \ } @@ -237,11 +238,11 @@ static int ad5791_read_raw(struct iio_dev *indio_dev, *val &= AD5791_DAC_MASK; *val >>= chan->scan_type.shift; return IIO_VAL_INT; - case (1 << IIO_CHAN_INFO_SCALE_SHARED): + case IIO_CHAN_INFO_SCALE: *val = 0; *val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits; return IIO_VAL_INT_PLUS_MICRO; - case (1 << IIO_CHAN_INFO_OFFSET_SHARED): + case IIO_CHAN_INFO_OFFSET: val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits); do_div(val64, st->vref_mv); *val = -val64; @@ -397,9 +398,11 @@ static const struct spi_device_id ad5791_id[] = { {"ad5760", ID_AD5760}, {"ad5780", ID_AD5780}, {"ad5781", ID_AD5781}, + {"ad5790", ID_AD5791}, {"ad5791", ID_AD5791}, {} }; +MODULE_DEVICE_TABLE(spi, ad5791_id); static struct spi_driver ad5791_driver = { .driver = { @@ -413,5 +416,5 @@ static struct spi_driver ad5791_driver = { module_spi_driver(ad5791_driver); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); -MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5791 DAC"); +MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC"); MODULE_LICENSE("GPL v2"); |