Dual microwave down converter module with input RF and LO frequency ranges from 0.5 to 32 GHz and an output IF frequency range from 0.1 to 8 GHz. It consists of a LNA, mixer, IF filter, DSA, and IF amplifier for each down conversion path. Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> --- V4 -> V5: Added missing return -ENODEV in setup function. Reordered variable declarations in probe function. V1 -> V4: No changes. MAINTAINERS | 1 + drivers/iio/frequency/Kconfig | 10 + drivers/iio/frequency/Makefile | 1 + drivers/iio/frequency/admfm2000.c | 310 ++++++++++++++++++++++++++++++ 4 files changed, 322 insertions(+) create mode 100644 drivers/iio/frequency/admfm2000.c diff --git a/MAINTAINERS b/MAINTAINERS index f1692ec68..d8630e490 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1253,6 +1253,7 @@ L: linux-iio@xxxxxxxxxxxxxxx S: Supported W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml +F: drivers/iio/frequency/admfm2000.c ANALOG DEVICES INC ADMV1013 DRIVER M: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig index 9e85dfa58..c455be7d4 100644 --- a/drivers/iio/frequency/Kconfig +++ b/drivers/iio/frequency/Kconfig @@ -60,6 +60,16 @@ config ADF4377 To compile this driver as a module, choose M here: the module will be called adf4377. +config ADMFM2000 + tristate "Analog Devices ADMFM2000 Dual Microwave Down Converter" + depends on GPIOLIB + help + Say yes here to build support for Analog Devices ADMFM2000 Dual + Microwave Down Converter. + + To compile this driver as a module, choose M here: the + module will be called admfm2000. + config ADMV1013 tristate "Analog Devices ADMV1013 Microwave Upconverter" depends on SPI && COMMON_CLK diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile index b616c29b4..70d0e0b70 100644 --- a/drivers/iio/frequency/Makefile +++ b/drivers/iio/frequency/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_AD9523) += ad9523.o obj-$(CONFIG_ADF4350) += adf4350.o obj-$(CONFIG_ADF4371) += adf4371.o obj-$(CONFIG_ADF4377) += adf4377.o +obj-$(CONFIG_ADMFM2000) += admfm2000.o obj-$(CONFIG_ADMV1013) += admv1013.o obj-$(CONFIG_ADMV1014) += admv1014.o obj-$(CONFIG_ADMV4420) += admv4420.o diff --git a/drivers/iio/frequency/admfm2000.c b/drivers/iio/frequency/admfm2000.c new file mode 100644 index 000000000..351fb9044 --- /dev/null +++ b/drivers/iio/frequency/admfm2000.c @@ -0,0 +1,310 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADMFM2000 Dual Microwave Down Converter + * + * Copyright 2023 Analog Devices Inc. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> + +#define ADMFM2000_MIXER_MODE 0 +#define ADMFM2000_DIRECT_IF_MODE 1 +#define ADMF20000_DSA_GPIOS 5 +#define ADMF20000_MODE_GPIOS 2 +#define ADMF20000_MAX_GAIN 0 +#define ADMF20000_MIN_GAIN -31000 +#define ADMF20000_DEFAULT_GAIN -0x20 + +struct admfm2000_state { + struct mutex lock; /* protect sensor state */ + struct gpio_descs *sw_ch[2]; + struct gpio_descs *dsa_gpios[2]; + u32 gain[2]; +}; + +static int admfm2000_mode(struct iio_dev *indio_dev, u32 reg, u32 mode) +{ + struct admfm2000_state *st = iio_priv(indio_dev); + DECLARE_BITMAP(values, 2); + + switch (mode) { + case ADMFM2000_MIXER_MODE: + values[0] = (reg == 0) ? 1 : 2; + gpiod_set_array_value_cansleep(st->sw_ch[reg]->ndescs, + st->sw_ch[reg]->desc, + NULL, values); + break; + case ADMFM2000_DIRECT_IF_MODE: + values[0] = (reg == 0) ? 2 : 1; + gpiod_set_array_value_cansleep(st->sw_ch[reg]->ndescs, + st->sw_ch[reg]->desc, + NULL, values); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int admfm2000_attenuation(struct iio_dev *indio_dev, u32 chan, + u32 value) +{ + struct admfm2000_state *st = iio_priv(indio_dev); + DECLARE_BITMAP(values, BITS_PER_TYPE(value)); + + values[0] = value; + + gpiod_set_array_value_cansleep(st->dsa_gpios[chan]->ndescs, + st->dsa_gpios[chan]->desc, + NULL, values); + return 0; +} + +static int admfm2000_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct admfm2000_state *st = iio_priv(indio_dev); + int gain; + + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + mutex_lock(&st->lock); + gain = ~(st->gain[chan->channel]) * -1000; + *val = gain / 1000; + *val2 = (gain % 1000) * 1000; + mutex_unlock(&st->lock); + + return IIO_VAL_INT_PLUS_MICRO_DB; + default: + return -EINVAL; + } +} + +static int admfm2000_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct admfm2000_state *st = iio_priv(indio_dev); + int gain, ret; + + if (val < 0) + gain = (val * 1000) - (val2 / 1000); + else + gain = (val * 1000) + (val2 / 1000); + + if (gain > ADMF20000_MAX_GAIN || gain < ADMF20000_MIN_GAIN) + return -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + mutex_lock(&st->lock); + st->gain[chan->channel] = ~((abs(gain) / 1000) & 0x1F); + + ret = admfm2000_attenuation(indio_dev, chan->channel, + st->gain[chan->channel]); + + mutex_unlock(&st->lock); + if (ret) + return ret; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int admfm2000_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + return IIO_VAL_INT_PLUS_MICRO_DB; + default: + return -EINVAL; + } +} + +static const struct iio_info admfm2000_info = { + .read_raw = &admfm2000_read_raw, + .write_raw = &admfm2000_write_raw, + .write_raw_get_fmt = &admfm2000_write_raw_get_fmt, +}; + +#define ADMFM2000_CHAN(_channel) { \ + .type = IIO_VOLTAGE, \ + .output = 1, \ + .indexed = 1, \ + .channel = _channel, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_HARDWAREGAIN), \ +} + +static const struct iio_chan_spec admfm2000_channels[] = { + ADMFM2000_CHAN(0), + ADMFM2000_CHAN(1), +}; + +static int admfm2000_channel_config(struct admfm2000_state *st, + struct iio_dev *indio_dev) +{ + struct platform_device *pdev = to_platform_device(indio_dev->dev.parent); + struct device *dev = &pdev->dev; + struct fwnode_handle *child; + u32 reg, mode; + int ret; + + device_for_each_child_node(dev, child) { + ret = fwnode_property_read_u32(child, "reg", ®); + if (ret) { + fwnode_handle_put(child); + return dev_err_probe(dev, ret, + "Failed to get reg property\n"); + } + + if (reg >= indio_dev->num_channels) { + fwnode_handle_put(child); + return dev_err_probe(dev, -EINVAL, "reg bigger than: %d\n", + indio_dev->num_channels); + } + + ret = fwnode_property_read_u32(child, "adi,mode", &mode); + if (ret) { + fwnode_handle_put(child); + return dev_err_probe(dev, ret, + "Failed to get mode property\n"); + } + + if (mode >= 2) { + fwnode_handle_put(child); + return dev_err_probe(dev, -EINVAL, "mode bigger than: 1\n"); + } + + ret = admfm2000_mode(indio_dev, reg, mode); + if (ret) { + fwnode_handle_put(child); + return ret; + } + } + + return 0; +} + +static int admfm2000_setup(struct admfm2000_state *st, + struct iio_dev *indio_dev) +{ + struct platform_device *pdev = to_platform_device(indio_dev->dev.parent); + struct device *dev = &pdev->dev; + + st->sw_ch[0] = devm_gpiod_get_array(dev, "switch1", GPIOD_OUT_LOW); + if (IS_ERR(st->sw_ch[0])) + return dev_err_probe(dev, PTR_ERR(st->sw_ch[0]), + "Failed to get gpios\n"); + + if (st->sw_ch[0]->ndescs != ADMF20000_MODE_GPIOS) { + dev_err_probe(dev, -ENODEV, "%d GPIOs needed to operate\n", + ADMF20000_MODE_GPIOS); + return -ENODEV; + } + + st->sw_ch[1] = devm_gpiod_get_array(dev, "switch2", GPIOD_OUT_LOW); + if (IS_ERR(st->sw_ch[1])) + return dev_err_probe(dev, PTR_ERR(st->sw_ch[1]), + "Failed to get gpios\n"); + + if (st->sw_ch[1]->ndescs != ADMF20000_MODE_GPIOS) { + dev_err_probe(dev, -ENODEV, "%d GPIOs needed to operate\n", + ADMF20000_MODE_GPIOS); + return -ENODEV; + } + + st->dsa_gpios[0] = devm_gpiod_get_array(dev, "attenuation1", + GPIOD_OUT_LOW); + if (IS_ERR(st->dsa_gpios[0])) + return dev_err_probe(dev, PTR_ERR(st->dsa_gpios[0]), + "Failed to get gpios\n"); + + if (st->dsa_gpios[0]->ndescs != ADMF20000_DSA_GPIOS) { + dev_err_probe(dev, -ENODEV, "%d GPIOs needed to operate\n", + ADMF20000_DSA_GPIOS); + return -ENODEV; + } + + st->dsa_gpios[1] = devm_gpiod_get_array(dev, "attenuation2", + GPIOD_OUT_LOW); + if (IS_ERR(st->dsa_gpios[1])) + return dev_err_probe(dev, PTR_ERR(st->dsa_gpios[1]), + "Failed to get gpios\n"); + + if (st->dsa_gpios[1]->ndescs != ADMF20000_DSA_GPIOS) { + dev_err_probe(dev, -ENODEV, "%d GPIOs needed to operate\n", + ADMF20000_DSA_GPIOS); + return -ENODEV; + } + + return 0; +} + +static int admfm2000_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct admfm2000_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + indio_dev->name = "admfm2000"; + indio_dev->num_channels = ARRAY_SIZE(admfm2000_channels); + indio_dev->channels = admfm2000_channels; + indio_dev->info = &admfm2000_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + st->gain[0] = ADMF20000_DEFAULT_GAIN; + st->gain[1] = ADMF20000_DEFAULT_GAIN; + + mutex_init(&st->lock); + + ret = admfm2000_setup(st, indio_dev); + if (ret) + return ret; + + ret = admfm2000_channel_config(st, indio_dev); + if (ret) + return ret; + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct of_device_id admfm2000_of_match[] = { + { .compatible = "adi,admfm2000" }, + { } +}; +MODULE_DEVICE_TABLE(of, admfm2000_of_match); + +static struct platform_driver admfm2000_driver = { + .driver = { + .name = "admfm2000", + .of_match_table = admfm2000_of_match, + }, + .probe = admfm2000_probe, +}; +module_platform_driver(admfm2000_driver); + +MODULE_AUTHOR("Kim Seer Paller <kimseer.paller@xxxxxxxxxx>"); +MODULE_DESCRIPTION("ADMFM2000 Dual Microwave Down Converter"); +MODULE_LICENSE("GPL"); -- 2.34.1
