diff options
Diffstat (limited to 'drivers/iio/dac')
| -rw-r--r-- | drivers/iio/dac/Kconfig | 33 | ||||
| -rw-r--r-- | drivers/iio/dac/Makefile | 3 | ||||
| -rw-r--r-- | drivers/iio/dac/ad5686-spi.c | 93 | ||||
| -rw-r--r-- | drivers/iio/dac/ad5686.c | 311 | ||||
| -rw-r--r-- | drivers/iio/dac/ad5686.h | 121 | ||||
| -rw-r--r-- | drivers/iio/dac/ad5696-i2c.c | 97 | ||||
| -rw-r--r-- | drivers/iio/dac/ti-dac5571.c | 439 |
7 files changed, 912 insertions, 185 deletions
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 76db0768e454..06e90debb9f5 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -131,16 +131,31 @@ config LTC2632 module will be called ltc2632. config AD5686 - tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver" + tristate + +config AD5686_SPI + tristate "Analog Devices AD5686 and similar multi-channel DACs (SPI)" depends on SPI + select AD5686 help - Say yes here to build support for Analog Devices AD5686R, AD5685R, - AD5684R, AD5791 Voltage Output Digital to - Analog Converter. + Say yes here to build support for Analog Devices AD5672R, AD5676, + AD5676R, AD5684, AD5684R, AD5684R, AD5685R, AD5686, AD5686R. + Voltage Output Digital to Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5686. +config AD5696_I2C + tristate "Analog Devices AD5696 and similar multi-channel DACs (I2C)" + depends on I2C + select AD5686 + help + Say yes here to build support for Analog Devices AD5671R, AD5675R, + AD5694, AD5694R, AD5695R, AD5696, AD5696R Voltage Output Digital to + Analog Converter. + To compile this driver as a module, choose M here: the module will be + called ad5696. + config AD5755 tristate "Analog Devices AD5755/AD5755-1/AD5757/AD5735/AD5737 DAC driver" depends on SPI_MASTER @@ -321,6 +336,16 @@ config TI_DAC082S085 If compiled as a module, it will be called ti-dac082s085. +config TI_DAC5571 + tristate "Texas Instruments 8/10/12/16-bit 1/2/4-channel DAC driver" + depends on I2C + help + Driver for the Texas Instruments + DAC5571, DAC6571, DAC7571, DAC5574, DAC6574, DAC7574, DAC5573, + DAC6573, DAC7573, DAC8571, DAC8574. + + If compiled as a module, it will be called ti-dac5571. + config VF610_DAC tristate "Vybrid vf610 DAC driver" depends on OF diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 81e710ed7491..57aa230d34ab 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -20,6 +20,8 @@ obj-$(CONFIG_AD5761) += ad5761.o obj-$(CONFIG_AD5764) += ad5764.o obj-$(CONFIG_AD5791) += ad5791.o obj-$(CONFIG_AD5686) += ad5686.o +obj-$(CONFIG_AD5686_SPI) += ad5686-spi.o +obj-$(CONFIG_AD5696_I2C) += ad5696-i2c.o obj-$(CONFIG_AD7303) += ad7303.o obj-$(CONFIG_AD8801) += ad8801.o obj-$(CONFIG_CIO_DAC) += cio-dac.o @@ -35,4 +37,5 @@ obj-$(CONFIG_MCP4922) += mcp4922.o obj-$(CONFIG_STM32_DAC_CORE) += stm32-dac-core.o obj-$(CONFIG_STM32_DAC) += stm32-dac.o obj-$(CONFIG_TI_DAC082S085) += ti-dac082s085.o +obj-$(CONFIG_TI_DAC5571) += ti-dac5571.o obj-$(CONFIG_VF610_DAC) += vf610_dac.o diff --git a/drivers/iio/dac/ad5686-spi.c b/drivers/iio/dac/ad5686-spi.c new file mode 100644 index 000000000000..6bb09e9259e6 --- /dev/null +++ b/drivers/iio/dac/ad5686-spi.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AD5672R, AD5676, AD5676R, AD5684, AD5684R, AD5684R, AD5685R, AD5686, AD5686R + * Digital to analog converters driver + * + * Copyright 2018 Analog Devices Inc. + */ + +#include "ad5686.h" + +#include <linux/module.h> +#include <linux/spi/spi.h> + +static int ad5686_spi_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val) +{ + struct spi_device *spi = to_spi_device(st->dev); + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | + AD5686_ADDR(addr) | + val); + + return spi_write(spi, &st->data[0].d8[1], 3); +} + +static int ad5686_spi_read(struct ad5686_state *st, u8 addr) +{ + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .tx_buf = &st->data[1].d8[1], + .rx_buf = &st->data[2].d8[1], + .len = 3, + }, + }; + struct spi_device *spi = to_spi_device(st->dev); + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | + AD5686_ADDR(addr)); + st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); + + ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t)); + if (ret < 0) + return ret; + + return be32_to_cpu(st->data[2].d32); +} + +static int ad5686_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + + return ad5686_probe(&spi->dev, id->driver_data, id->name, + ad5686_spi_write, ad5686_spi_read); +} + +static int ad5686_spi_remove(struct spi_device *spi) +{ + return ad5686_remove(&spi->dev); +} + +static const struct spi_device_id ad5686_spi_id[] = { + {"ad5672r", ID_AD5672R}, + {"ad5676", ID_AD5676}, + {"ad5676r", ID_AD5676R}, + {"ad5684", ID_AD5684}, + {"ad5684r", ID_AD5684R}, + {"ad5685", ID_AD5685R}, /* Does not exist */ + {"ad5685r", ID_AD5685R}, + {"ad5686", ID_AD5686}, + {"ad5686r", ID_AD5686R}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5686_spi_id); + +static struct spi_driver ad5686_spi_driver = { + .driver = { + .name = "ad5686", + }, + .probe = ad5686_spi_probe, + .remove = ad5686_spi_remove, + .id_table = ad5686_spi_id, +}; + +module_spi_driver(ad5686_spi_driver); + +MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); +MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index 20254df7f9c7..89c5f089ae7f 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -1,9 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * AD5686R, AD5685R, AD5684R Digital to analog converters driver * * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. */ #include <linux/interrupt.h> @@ -11,7 +10,6 @@ #include <linux/device.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> @@ -19,116 +17,7 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> -#define AD5686_DAC_CHANNELS 4 - -#define AD5686_ADDR(x) ((x) << 16) -#define AD5686_CMD(x) ((x) << 20) - -#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) -#define AD5686_ADDR_ALL_DAC 0xF - -#define AD5686_CMD_NOOP 0x0 -#define AD5686_CMD_WRITE_INPUT_N 0x1 -#define AD5686_CMD_UPDATE_DAC_N 0x2 -#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 -#define AD5686_CMD_POWERDOWN_DAC 0x4 -#define AD5686_CMD_LDAC_MASK 0x5 -#define AD5686_CMD_RESET 0x6 -#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 -#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 -#define AD5686_CMD_READBACK_ENABLE 0x9 - -#define AD5686_LDAC_PWRDN_NONE 0x0 -#define AD5686_LDAC_PWRDN_1K 0x1 -#define AD5686_LDAC_PWRDN_100K 0x2 -#define AD5686_LDAC_PWRDN_3STATE 0x3 - -/** - * struct ad5686_chip_info - chip specific information - * @int_vref_mv: AD5620/40/60: the internal reference voltage - * @channel: channel specification -*/ - -struct ad5686_chip_info { - u16 int_vref_mv; - struct iio_chan_spec channel[AD5686_DAC_CHANNELS]; -}; - -/** - * struct ad5446_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - * @pwr_down_mask: power down mask - * @pwr_down_mode: current power down mode - * @data: spi transfer buffers - */ - -struct ad5686_state { - struct spi_device *spi; - const struct ad5686_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned pwr_down_mask; - unsigned pwr_down_mode; - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - - union { - __be32 d32; - u8 d8[4]; - } data[3] ____cacheline_aligned; -}; - -/** - * ad5686_supported_device_ids: - */ - -enum ad5686_supported_device_ids { - ID_AD5684, - ID_AD5685, - ID_AD5686, -}; -static int ad5686_spi_write(struct ad5686_state *st, - u8 cmd, u8 addr, u16 val, u8 shift) -{ - val <<= shift; - - st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | - AD5686_ADDR(addr) | - val); - - return spi_write(st->spi, &st->data[0].d8[1], 3); -} - -static int ad5686_spi_read(struct ad5686_state *st, u8 addr) -{ - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .tx_buf = &st->data[1].d8[1], - .rx_buf = &st->data[2].d8[1], - .len = 3, - }, - }; - int ret; - - st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | - AD5686_ADDR(addr)); - st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); - - ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); - if (ret < 0) - return ret; - - return be32_to_cpu(st->data[2].d32); -} +#include "ad5686.h" static const char * const ad5686_powerdown_modes[] = { "1kohm_to_gnd", @@ -137,7 +26,7 @@ static const char * const ad5686_powerdown_modes[] = { }; static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) + const struct iio_chan_spec *chan) { struct ad5686_state *st = iio_priv(indio_dev); @@ -145,7 +34,8 @@ static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, } static int ad5686_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) + const struct iio_chan_spec *chan, + unsigned int mode) { struct ad5686_state *st = iio_priv(indio_dev); @@ -163,17 +53,19 @@ static const struct iio_enum ad5686_powerdown_mode_enum = { }; static ssize_t ad5686_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) + uintptr_t private, const struct iio_chan_spec *chan, char *buf) { struct ad5686_state *st = iio_priv(indio_dev); return sprintf(buf, "%d\n", !!(st->pwr_down_mask & - (0x3 << (chan->channel * 2)))); + (0x3 << (chan->channel * 2)))); } static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, + size_t len) { bool readin; int ret; @@ -188,8 +80,9 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, else st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); - ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0, - st->pwr_down_mask & st->pwr_down_mode, 0); + ret = st->write(st, AD5686_CMD_POWERDOWN_DAC, 0, + st->pwr_down_mask & st->pwr_down_mode); + return ret ? ret : len; } @@ -206,7 +99,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, switch (m) { case IIO_CHAN_INFO_RAW: mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_read(st, chan->address); + ret = st->read(st, chan->address); mutex_unlock(&indio_dev->mlock); if (ret < 0) return ret; @@ -221,10 +114,10 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, } static int ad5686_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) { struct ad5686_state *st = iio_priv(indio_dev); int ret; @@ -235,11 +128,10 @@ static int ad5686_write_raw(struct iio_dev *indio_dev, return -EINVAL; mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_write(st, - AD5686_CMD_WRITE_INPUT_N_UPDATE_N, - chan->address, - val, - chan->scan_type.shift); + ret = st->write(st, + AD5686_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, + val << chan->scan_type.shift); mutex_unlock(&indio_dev->mlock); break; default: @@ -266,14 +158,14 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { { }, }; -#define AD5868_CHANNEL(chan, bits, _shift) { \ +#define AD5868_CHANNEL(chan, addr, bits, _shift) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .output = 1, \ .channel = chan, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ - .address = AD5686_ADDR_DAC(chan), \ + .address = addr, \ .scan_type = { \ .sign = 'u', \ .realbits = (bits), \ @@ -283,45 +175,121 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { .ext_info = ad5686_ext_info, \ } +#define DECLARE_AD5686_CHANNELS(name, bits, _shift) \ +static struct iio_chan_spec name[] = { \ + AD5868_CHANNEL(0, 1, bits, _shift), \ + AD5868_CHANNEL(1, 2, bits, _shift), \ + AD5868_CHANNEL(2, 4, bits, _shift), \ + AD5868_CHANNEL(3, 8, bits, _shift), \ +} + +#define DECLARE_AD5676_CHANNELS(name, bits, _shift) \ +static struct iio_chan_spec name[] = { \ + AD5868_CHANNEL(0, 0, bits, _shift), \ + AD5868_CHANNEL(1, 1, bits, _shift), \ + AD5868_CHANNEL(2, 2, bits, _shift), \ + AD5868_CHANNEL(3, 3, bits, _shift), \ + AD5868_CHANNEL(4, 4, bits, _shift), \ + AD5868_CHANNEL(5, 5, bits, _shift), \ + AD5868_CHANNEL(6, 6, bits, _shift), \ + AD5868_CHANNEL(7, 7, bits, _shift), \ +} + +DECLARE_AD5676_CHANNELS(ad5672_channels, 12, 4); +DECLARE_AD5676_CHANNELS(ad5676_channels, 16, 0); +DECLARE_AD5686_CHANNELS(ad5684_channels, 12, 4); +DECLARE_AD5686_CHANNELS(ad5685r_channels, 14, 2); +DECLARE_AD5686_CHANNELS(ad5686_channels, 16, 0); + static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { + [ID_AD5671R] = { + .channels = ad5672_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5672R] = { + .channels = ad5672_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5675R] = { + .channels = ad5676_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5676] = { + .channels = ad5676_channels, + .num_channels = 8, + }, + [ID_AD5676R] = { + .channels = ad5676_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, [ID_AD5684] = { - .channel[0] = AD5868_CHANNEL(0, 12, 4), - .channel[1] = AD5868_CHANNEL(1, 12, 4), - .channel[2] = AD5868_CHANNEL(2, 12, 4), - .channel[3] = AD5868_CHANNEL(3, 12, 4), + .channels = ad5684_channels, + .num_channels = 4, + }, + [ID_AD5684R] = { + .channels = ad5684_channels, .int_vref_mv = 2500, + .num_channels = 4, }, - [ID_AD5685] = { - .channel[0] = AD5868_CHANNEL(0, 14, 2), - .channel[1] = AD5868_CHANNEL(1, 14, 2), - .channel[2] = AD5868_CHANNEL(2, 14, 2), - .channel[3] = AD5868_CHANNEL(3, 14, 2), + [ID_AD5685R] = { + .channels = ad5685r_channels, .int_vref_mv = 2500, + .num_channels = 4, }, [ID_AD5686] = { - .channel[0] = AD5868_CHANNEL(0, 16, 0), - .channel[1] = AD5868_CHANNEL(1, 16, 0), - .channel[2] = AD5868_CHANNEL(2, 16, 0), - .channel[3] = AD5868_CHANNEL(3, 16, 0), + .channels = ad5686_channels, + .num_channels = 4, + }, + [ID_AD5686R] = { + .channels = ad5686_channels, .int_vref_mv = 2500, + .num_channels = 4, + }, + [ID_AD5694] = { + .channels = ad5684_channels, + .num_channels = 4, + }, + [ID_AD5694R] = { + .channels = ad5684_channels, + .int_vref_mv = 2500, + .num_channels = 4, + }, + [ID_AD5696] = { + .channels = ad5686_channels, + .num_channels = 4, + }, + [ID_AD5696R] = { + .channels = ad5686_channels, + .int_vref_mv = 2500, + .num_channels = 4, }, }; - -static int ad5686_probe(struct spi_device *spi) +int ad5686_probe(struct device *dev, + enum ad5686_supported_device_ids chip_type, + const char *name, ad5686_write_func write, + ad5686_read_func read) { struct ad5686_state *st; struct iio_dev *indio_dev; int ret, voltage_uv = 0; - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); if (indio_dev == NULL) return -ENOMEM; st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); + dev_set_drvdata(dev, indio_dev); + + st->dev = dev; + st->write = write; + st->read = read; - st->reg = devm_regulator_get_optional(&spi->dev, "vcc"); + st->reg = devm_regulator_get_optional(dev, "vcc"); if (!IS_ERR(st->reg)) { ret = regulator_enable(st->reg); if (ret) @@ -334,28 +302,25 @@ static int ad5686_probe(struct spi_device *spi) voltage_uv = ret; } - st->chip_info = - &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + st->chip_info = &ad5686_chip_info_tbl[chip_type]; if (voltage_uv) st->vref_mv = voltage_uv / 1000; else st->vref_mv = st->chip_info->int_vref_mv; - st->spi = spi; - /* Set all the power down mode for all channels to 1K pulldown */ st->pwr_down_mode = 0x55; - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->dev.parent = dev; + indio_dev->name = name; indio_dev->info = &ad5686_info; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channel; - indio_dev->num_channels = AD5686_DAC_CHANNELS; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; - ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, - !!voltage_uv, 0); + ret = st->write(st, AD5686_CMD_INTERNAL_REFER_SETUP, + 0, !!voltage_uv); if (ret) goto error_disable_reg; @@ -370,10 +335,11 @@ error_disable_reg: regulator_disable(st->reg); return ret; } +EXPORT_SYMBOL_GPL(ad5686_probe); -static int ad5686_remove(struct spi_device *spi) +int ad5686_remove(struct device *dev) { - struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5686_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); @@ -382,24 +348,7 @@ static int ad5686_remove(struct spi_device *spi) return 0; } - -static const struct spi_device_id ad5686_id[] = { - {"ad5684", ID_AD5684}, - {"ad5685", ID_AD5685}, - {"ad5686", ID_AD5686}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5686_id); - -static struct spi_driver ad5686_driver = { - .driver = { - .name = "ad5686", - }, - .probe = ad5686_probe, - .remove = ad5686_remove, - .id_table = ad5686_id, -}; -module_spi_driver(ad5686_driver); +EXPORT_SYMBOL_GPL(ad5686_remove); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC"); diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h new file mode 100644 index 000000000000..05f0ce9d2de1 --- /dev/null +++ b/drivers/iio/dac/ad5686.h @@ -0,0 +1,121 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * This file is part of AD5686 DAC driver + * + * Copyright 2018 Analog Devices Inc. + */ + +#ifndef __DRIVERS_IIO_DAC_AD5686_H__ +#define __DRIVERS_IIO_DAC_AD5686_H__ + +#include <linux/types.h> +#include <linux/cache.h> +#include <linux/mutex.h> +#include <linux/kernel.h> + +#define AD5686_ADDR(x) ((x) << 16) +#define AD5686_CMD(x) ((x) << 20) + +#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) +#define AD5686_ADDR_ALL_DAC 0xF + +#define AD5686_CMD_NOOP 0x0 +#define AD5686_CMD_WRITE_INPUT_N 0x1 +#define AD5686_CMD_UPDATE_DAC_N 0x2 +#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 +#define AD5686_CMD_POWERDOWN_DAC 0x4 +#define AD5686_CMD_LDAC_MASK 0x5 +#define AD5686_CMD_RESET 0x6 +#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 +#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 +#define AD5686_CMD_READBACK_ENABLE 0x9 + +#define AD5686_LDAC_PWRDN_NONE 0x0 +#define AD5686_LDAC_PWRDN_1K 0x1 +#define AD5686_LDAC_PWRDN_100K 0x2 +#define AD5686_LDAC_PWRDN_3STATE 0x3 + +/** + * ad5686_supported_device_ids: + */ +enum ad5686_supported_device_ids { + ID_AD5671R, + ID_AD5672R, + ID_AD5675R, + ID_AD5676, + ID_AD5676R, + ID_AD5684, + ID_AD5684R, + ID_AD5685R, + ID_AD5686, + ID_AD5686R, + ID_AD5694, + ID_AD5694R, + ID_AD5695R, + ID_AD5696, + ID_AD5696R, +}; + +struct ad5686_state; + +typedef int (*ad5686_write_func)(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val); + +typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr); + +/** + * struct ad5686_chip_info - chip specific information + * @int_vref_mv: AD5620/40/60: the internal reference voltage + * @num_channels: number of channels + * @channel: channel specification + */ + +struct ad5686_chip_info { + u16 int_vref_mv; + unsigned int num_channels; + struct iio_chan_spec *channels; +}; + +/** + * struct ad5446_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + * @pwr_down_mask: power down mask + * @pwr_down_mode: current power down mode + * @data: spi transfer buffers + */ + +struct ad5686_state { + struct device *dev; + const struct ad5686_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned int pwr_down_mask; + unsigned int pwr_down_mode; + ad5686_write_func write; + ad5686_read_func read; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + + union { + __be32 d32; + __be16 d16; + u8 d8[4]; + } data[3] ____cacheline_aligned; +}; + + +int ad5686_probe(struct device *dev, + enum ad5686_supported_device_ids chip_type, + const char *name, ad5686_write_func write, + ad5686_read_func read); + +int ad5686_remove(struct device *dev); + + +#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */ diff --git a/drivers/iio/dac/ad5696-i2c.c b/drivers/iio/dac/ad5696-i2c.c new file mode 100644 index 000000000000..275e0321bcf8 --- /dev/null +++ b/drivers/iio/dac/ad5696-i2c.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AD5671R, AD5675R, AD5694, AD5694R, AD5695R, AD5696, AD5696R + * Digital to analog converters driver + * + * Copyright 2018 Analog Devices Inc. + */ + +#include "ad5686.h" + +#include <linux/module.h> +#include <linux/i2c.h> + +static int ad5686_i2c_read(struct ad5686_state *st, u8 addr) +{ + struct i2c_client *i2c = to_i2c_client(st->dev); + struct i2c_msg msg[2] = { + { + .addr = i2c->addr, + .flags = i2c->flags, + .len = 3, + .buf = &st->data[0].d8[1], + }, + { + .addr = i2c->addr, + .flags = i2c->flags | I2C_M_RD, + .len = 2, + .buf = (char *)&st->data[0].d16, + }, + }; + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) | + AD5686_ADDR(addr) | + 0x00); + + ret = i2c_transfer(i2c->adapter, msg, 2); + if (ret < 0) + return ret; + + return be16_to_cpu(st->data[0].d16); +} + +static int ad5686_i2c_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val) +{ + struct i2c_client *i2c = to_i2c_client(st->dev); + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr) + | val); + + ret = i2c_master_send(i2c, &st->data[0].d8[1], 3); + if (ret < 0) + return ret; + + return (ret != 3) ? -EIO : 0; +} + +static int ad5686_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + return ad5686_probe(&i2c->dev, id->driver_data, id->name, + ad5686_i2c_write, ad5686_i2c_read); +} + +static int ad5686_i2c_remove(struct i2c_client *i2c) +{ + return ad5686_remove(&i2c->dev); +} + +static const struct i2c_device_id ad5686_i2c_id[] = { + {"ad5671r", ID_AD5671R}, + {"ad5675r", ID_AD5675R}, + {"ad5694", ID_AD5694}, + {"ad5694r", ID_AD5694R}, + {"ad5695r", ID_AD5695R}, + {"ad5696", ID_AD5696}, + {"ad5696r", ID_AD5696R}, + {} +}; +MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id); + +static struct i2c_driver ad5686_i2c_driver = { + .driver = { + .name = "ad5696", + }, + .probe = ad5686_i2c_probe, + .remove = ad5686_i2c_remove, + .id_table = ad5686_i2c_id, +}; + +module_i2c_driver(ad5686_i2c_driver); + +MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); +MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c new file mode 100644 index 000000000000..dd21eebed6a8 --- /dev/null +++ b/drivers/iio/dac/ti-dac5571.c @@ -0,0 +1,439 @@ +/* + * ti-dac5571.c - Texas Instruments 8/10/12-bit 1/4-channel DAC driver + * + * Copyright (C) 2018 Prevas A/S + * + * http://www.ti.com/lit/ds/symlink/dac5571.pdf + * http://www.ti.com/lit/ds/symlink/dac6571.pdf + * http://www.ti.com/lit/ds/symlink/dac7571.pdf + * http://www.ti.com/lit/ds/symlink/dac5574.pdf + * http://www.ti.com/lit/ds/symlink/dac6574.pdf + * http://www.ti.com/lit/ds/symlink/dac7574.pdf + * http://www.ti.com/lit/ds/symlink/dac5573.pdf + * http://www.ti.com/lit/ds/symlink/dac6573.pdf + * http://www.ti.com/lit/ds/symlink/dac7573.pdf + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2) as + * published by the Free Software Foundation. + */ + +#include <linux/iio/iio.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +enum chip_id { + single_8bit, single_10bit, single_12bit, + quad_8bit, quad_10bit, quad_12bit +}; + +struct dac5571_spec { + u8 num_channels; + u8 resolution; +}; + +static const struct dac5571_spec dac5571_spec[] = { + [single_8bit] = {.num_channels = 1, .resolution = 8}, + [single_10bit] = {.num_channels = 1, .resolution = 10}, + [single_12bit] = {.num_channels = 1, .resolution = 12}, + [quad_8bit] = {.num_channels = 4, .resolution = 8}, + [quad_10bit] = {.num_channels = 4, .resolution = 10}, + [quad_12bit] = {.num_channels = 4, .resolution = 12}, +}; + +struct dac5571_data { + struct i2c_client *client; + int id; + struct mutex lock; + struct regulator *vref; + u16 val[4]; + bool powerdown; + u8 powerdown_mode; + struct dac5571_spec const *spec; + int (*dac5571_cmd)(struct dac5571_data *data, int channel, u16 val); + int (*dac5571_pwrdwn)(struct dac5571_data *data, int channel, u8 pwrdwn); + u8 buf[3] ____cacheline_aligned; +}; + +#define DAC5571_POWERDOWN(mode) ((mode) + 1) +#define DAC5571_POWERDOWN_FLAG BIT(0) +#define DAC5571_CHANNEL_SELECT 1 +#define DAC5571_LOADMODE_DIRECT BIT(4) +#define DAC5571_SINGLE_PWRDWN_BITS 4 +#define DAC5571_QUAD_PWRDWN_BITS 6 + +static int dac5571_cmd_single(struct dac5571_data *data, int channel, u16 val) +{ + unsigned int shift; + + shift = 12 - data->spec->resolution; + data->buf[1] = val << shift; + data->buf[0] = val >> (8 - shift); + + if (i2c_master_send(data->client, data->buf, 2) != 2) + return -EIO; + + return 0; +} + +static int dac5571_cmd_quad(struct dac5571_data *data, int channel, u16 val) +{ + unsigned int shift; + + shift = 16 - data->spec->resolution; + data->buf[2] = val << shift; + data->buf[1] = (val >> (8 - shift)); + data->buf[0] = (channel << DAC5571_CHANNEL_SELECT) | + DAC5571_LOADMODE_DIRECT; + + if (i2c_master_send(data->client, data->buf, 3) != 3) + return -EIO; + + return 0; +} + +static int dac5571_pwrdwn_single(struct dac5571_data *data, int channel, u8 pwrdwn) +{ + unsigned int shift; + + shift = 12 - data->spec->resolution; + data->buf[1] = 0; + data->buf[0] = pwrdwn << DAC5571_SINGLE_PWRDWN_BITS; + + if (i2c_master_send(data->client, data->buf, 2) != 2) + return -EIO; + + return 0; +} + +static int dac5571_pwrdwn_quad(struct dac5571_data *data, int channel, u8 pwrdwn) +{ + unsigned int shift; + + shift = 16 - data->spec->resolution; + data->buf[2] = 0; + data->buf[1] = pwrdwn << DAC5571_QUAD_PWRDWN_BITS; + data->buf[0] = (channel << DAC5571_CHANNEL_SELECT) | + DAC5571_LOADMODE_DIRECT | DAC5571_POWERDOWN_FLAG; + + if (i2c_master_send(data->client, data->buf, 3) != 3) + return -EIO; + + return 0; +} + +static const char *const dac5571_powerdown_modes[] = { + "1kohm_to_gnd", "100kohm_to_gnd", "three_state", +}; + +static int dac5571_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct dac5571_data *data = iio_priv(indio_dev); + + return data->powerdown_mode; +} + +static int dac5571_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + unsigned int mode) +{ + struct dac5571_data *data = iio_priv(indio_dev); + int ret = 0; + + if (data->powerdown_mode == mode) + return 0; + + mutex_lock(&data->lock); + if (data->powerdown) { + ret = data->dac5571_pwrdwn(data, chan->channel, + DAC5571_POWERDOWN(mode)); + if (ret) + goto out; + } + data->powerdown_mode = mode; + + out: + mutex_unlock(&data->lock); + + return ret; +} + +static const struct iio_enum dac5571_powerdown_mode = { + .items = dac5571_powerdown_modes, + .num_items = ARRAY_SIZE(dac5571_powerdown_modes), + .get = dac5571_get_powerdown_mode, + .set = dac5571_set_powerdown_mode, +}; + +static ssize_t dac5571_read_powerdown(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + char *buf) +{ + struct dac5571_data *data = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", data->powerdown); +} + +static ssize_t dac5571_write_powerdown(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct dac5571_data *data = iio_priv(indio_dev); + bool powerdown; + int ret; + + ret = strtobool(buf, &powerdown); + if (ret) + return ret; + + if (data->powerdown == powerdown) + return len; + + mutex_lock(&data->lock); + if (powerdown) + ret = data->dac5571_pwrdwn(data, chan->channel, + DAC5571_POWERDOWN(data->powerdown_mode)); + else + ret = data->dac5571_cmd(data, chan->channel, data->val[0]); + if (ret) + goto out; + + data->powerdown = powerdown; + + out: + mutex_unlock(&data->lock); + + return ret ? ret : len; +} + + +static const struct iio_chan_spec_ext_info dac5571_ext_info[] = { + { + .name = "powerdown", + .read = dac5571_read_powerdown, + .write = dac5571_write_powerdown, + .shared = IIO_SHARED_BY_TYPE, + }, + IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &dac5571_powerdown_mode), + IIO_ENUM_AVAILABLE("powerdown_mode", &dac5571_powerdown_mode), + {}, +}; + +#define dac5571_CHANNEL(chan, name) { \ + .type = IIO_VOLTAGE, \ + .channel = (chan), \ + .address = (chan), \ + .indexed = true, \ + .output = true, \ + .datasheet_name = name, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .ext_info = dac5571_ext_info, \ +} + +static const struct iio_chan_spec dac5571_channels[] = { + dac5571_CHANNEL(0, "A"), + dac5571_CHANNEL(1, "B"), + dac5571_CHANNEL(2, "C"), + dac5571_CHANNEL(3, "D"), +}; + +static int dac5571_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct dac5571_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *val = data->val[chan->channel]; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + ret = regulator_get_voltage(data->vref); + if (ret < 0) + return ret; + + *val = ret / 1000; + *val2 = data->spec->resolution; + return IIO_VAL_FRACTIONAL_LOG2; + + default: + return -EINVAL; + } +} + +static int dac5571_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct dac5571_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (data->val[chan->channel] == val) + return 0; + + if (val >= (1 << data->spec->resolution) || val < 0) + return -EINVAL; + + if (data->powerdown) + return -EBUSY; + + mutex_lock(&data->lock); + ret = data->dac5571_cmd(data, chan->channel, val); + if (ret == 0) + data->val[chan->channel] = val; + mutex_unlock(&data->lock); + return ret; + + default: + return -EINVAL; + } +} + +static int dac5571_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT; +} + +static const struct iio_info dac5571_info = { + .read_raw = dac5571_read_raw, + .write_raw = dac5571_write_raw, + .write_raw_get_fmt = dac5571_write_raw_get_fmt, +}; + +static int dac5571_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + const struct dac5571_spec *spec; + struct dac5571_data *data; + struct iio_dev *indio_dev; + int ret, i; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + indio_dev->dev.parent = dev; + indio_dev->dev.of_node = client->dev.of_node; + indio_dev->info = &dac5571_info; + indio_dev->name = id->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = dac5571_channels; + + spec = &dac5571_spec[id->driver_data]; + indio_dev->num_channels = spec->num_channels; + data->spec = spec; + + data->vref = devm_regulator_get(dev, "vref"); + if (IS_ERR(data->vref)) + return PTR_ERR(data->vref); + + ret = regulator_enable(data->vref); + if (ret < 0) + return ret; + + mutex_init(&data->lock); + + switch (spec->num_channels) { + case 1: + data->dac5571_cmd = dac5571_cmd_single; + data->dac5571_pwrdwn = dac5571_pwrdwn_single; + break; + case 4: + data->dac5571_cmd = dac5571_cmd_quad; + data->dac5571_pwrdwn = dac5571_pwrdwn_quad; + break; + default: + goto err; + } + + for (i = 0; i < spec->num_channels; i++) { + ret = data->dac5571_cmd(data, i, 0); + if (ret) { + dev_err(dev, "failed to initialize channel %d to 0\n", i); + goto err; + } + } + + ret = iio_device_register(indio_dev); + if (ret) + goto err; + + return 0; + + err: + regulator_disable(data->vref); + return ret; +} + +static int dac5571_remove(struct i2c_client *i2c) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(i2c); + struct dac5571_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + regulator_disable(data->vref); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id dac5571_of_id[] = { + {.compatible = "ti,dac5571"}, + {.compatible = "ti,dac6571"}, + {.compatible = "ti,dac7571"}, + {.compatible = "ti,dac5574"}, + {.compatible = "ti,dac6574"}, + {.compatible = "ti,dac7574"}, + {.compatible = "ti,dac5573"}, + {.compatible = "ti,dac6573"}, + {.compatible = "ti,dac7573"}, + {} +}; +MODULE_DEVICE_TABLE(of, dac5571_of_id); +#endif + +static const struct i2c_device_id dac5571_id[] = { + {"dac5571", single_8bit}, + {"dac6571", single_10bit}, + {"dac7571", single_12bit}, + {"dac5574", quad_8bit}, + {"dac6574", quad_10bit}, + {"dac7574", quad_12bit}, + {"dac5573", quad_8bit}, + {"dac6573", quad_10bit}, + {"dac7573", quad_12bit}, + {} +}; +MODULE_DEVICE_TABLE(i2c, dac5571_id); + +static struct i2c_driver dac5571_driver = { + .driver = { + .name = "ti-dac5571", + }, + .probe = dac5571_probe, + .remove = dac5571_remove, + .id_table = dac5571_id, +}; +module_i2c_driver(dac5571_driver); + +MODULE_AUTHOR("Sean Nyekjaer <sean.nyekjaer@prevas.dk>"); +MODULE_DESCRIPTION("Texas Instruments 8/10/12-bit 1/4-channel DAC driver"); +MODULE_LICENSE("GPL v2"); |