[PATCH v3 1/4] iio:frequency:admv1014: add support for ADMV1014

Antoniu Miclaus
2022-01-19T08:19:52Z

The ADMV1014 is a silicon germanium (SiGe), wideband,
microwave downconverter optimized for point to point microwave
radio designs operating in the 24 GHz to 44 GHz frequency range.

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADMV1014.pdf
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
changes in v3:
- add line breaks where needed
- expose IIO channels/attributes based on the input mode
- remove comma after null terminator
- make VCC_X regulators optional and remove value checks
- use only unlocked versions of spi read/write inside init function
- move powerdown action to init function
drivers/iio/frequency/Kconfig | 10 +
drivers/iio/frequency/Makefile | 1 +
drivers/iio/frequency/admv1014.c | 950 +++++++++++++++++++++++++++++++
3 files changed, 961 insertions(+)
create mode 100644 drivers/iio/frequency/admv1014.c

diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
index 2c9e0559e8a4..493221f42077 100644
--- a/drivers/iio/frequency/Kconfig
+++ b/drivers/iio/frequency/Kconfig
@@ -50,6 +50,16 @@ config ADF4371
To compile this driver as a module, choose M here: the
module will be called adf4371.

+config ADMV1014
+ tristate "Analog Devices ADMV1014 Microwave Downconverter"
+ depends on SPI && COMMON_CLK && 64BIT
+ help
+ Say yes here to build support for Analog Devices ADMV1014
+ 24 GHz to 44 GHz, Wideband, Microwave Downconverter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called admv1014.
+
config ADRF6780
tristate "Analog Devices ADRF6780 Microwave Upconverter"
depends on SPI
diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile
index ae3136c79202..5f0348e5eb53 100644
--- a/drivers/iio/frequency/Makefile
+++ b/drivers/iio/frequency/Makefile
@@ -7,4 +7,5 @@
obj-$(CONFIG_AD9523) += ad9523.o
obj-$(CONFIG_ADF4350) += adf4350.o
obj-$(CONFIG_ADF4371) += adf4371.o
+obj-$(CONFIG_ADMV1014) += admv1014.o
obj-$(CONFIG_ADRF6780) += adrf6780.o
diff --git a/drivers/iio/frequency/admv1014.c b/drivers/iio/frequency/admv1014.c
new file mode 100644
index 000000000000..667e5fade425
--- /dev/null
+++ b/drivers/iio/frequency/admv1014.c
@@ -0,0 +1,950 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADMV1014 driver
+ *
+ * Copyright 2022 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/notifier.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/units.h>
+
+#include <asm/unaligned.h>
+
+/* ADMV1014 Register Map */
+#define ADMV1014_REG_SPI_CONTROL 0x00
+#define ADMV1014_REG_ALARM 0x01
+#define ADMV1014_REG_ALARM_MASKS 0x02
+#define ADMV1014_REG_ENABLE 0x03
+#define ADMV1014_REG_QUAD 0x04
+#define ADMV1014_REG_LO_AMP_PHASE_ADJUST1 0x05
+#define ADMV1014_REG_MIXER 0x07
+#define ADMV1014_REG_IF_AMP 0x08
+#define ADMV1014_REG_IF_AMP_BB_AMP 0x09
+#define ADMV1014_REG_BB_AMP_AGC 0x0A
+#define ADMV1014_REG_VVA_TEMP_COMP 0x0B
+
+/* ADMV1014_REG_SPI_CONTROL Map */
+#define ADMV1014_PARITY_EN_MSK BIT(15)
+#define ADMV1014_SPI_SOFT_RESET_MSK BIT(14)
+#define ADMV1014_CHIP_ID_MSK GENMASK(11, 4)
+#define ADMV1014_CHIP_ID 0x9
+#define ADMV1014_REVISION_ID_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_ALARM Map */
+#define ADMV1014_PARITY_ERROR_MSK BIT(15)
+#define ADMV1014_TOO_FEW_ERRORS_MSK BIT(14)
+#define ADMV1014_TOO_MANY_ERRORS_MSK BIT(13)
+#define ADMV1014_ADDRESS_RANGE_ERROR_MSK BIT(12)
+
+/* ADMV1014_REG_ENABLE Map */
+#define ADMV1014_IBIAS_PD_MSK BIT(14)
+#define ADMV1014_P1DB_COMPENSATION_MSK GENMASK(13, 12)
+#define ADMV1014_IF_AMP_PD_MSK BIT(11)
+#define ADMV1014_QUAD_BG_PD_MSK BIT(9)
+#define ADMV1014_BB_AMP_PD_MSK BIT(8)
+#define ADMV1014_QUAD_IBIAS_PD_MSK BIT(7)
+#define ADMV1014_DET_EN_MSK BIT(6)
+#define ADMV1014_BG_PD_MSK BIT(5)
+
+/* ADMV1014_REG_QUAD Map */
+#define ADMV1014_QUAD_SE_MODE_MSK GENMASK(9, 6)
+#define ADMV1014_QUAD_FILTERS_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_LO_AMP_PHASE_ADJUST1 Map */
+#define ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK GENMASK(15, 9)
+#define ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK GENMASK(8, 2)
+
+/* ADMV1014_REG_MIXER Map */
+#define ADMV1014_MIXER_VGATE_MSK GENMASK(15, 9)
+#define ADMV1014_DET_PROG_MSK GENMASK(6, 0)
+
+/* ADMV1014_REG_IF_AMP Map */
+#define ADMV1014_IF_AMP_COARSE_GAIN_I_MSK GENMASK(11, 8)
+#define ADMV1014_IF_AMP_FINE_GAIN_Q_MSK GENMASK(7, 4)
+#define ADMV1014_IF_AMP_FINE_GAIN_I_MSK GENMASK(3, 0)
+
+/* ADMV1014_REG_IF_AMP_BB_AMP Map */
+#define ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK GENMASK(15, 12)
+#define ADMV1014_BB_AMP_OFFSET_Q_MSK GENMASK(9, 5)
+#define ADMV1014_BB_AMP_OFFSET_I_MSK GENMASK(4, 0)
+
+/* ADMV1014_REG_BB_AMP_AGC Map */
+#define ADMV1014_BB_AMP_REF_GEN_MSK GENMASK(6, 3)
+#define ADMV1014_BB_AMP_GAIN_CTRL_MSK GENMASK(2, 1)
+#define ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK BIT(0)
+
+/* ADMV1014_REG_VVA_TEMP_COMP Map */
+#define ADMV1014_VVA_TEMP_COMP_MSK GENMASK(15, 0)
+
+/* ADMV1014 Miscellaneous Defines */
+#define ADMV1014_READ BIT(7)
+#define ADMV1014_REG_ADDR_READ_MSK GENMASK(6, 1)
+#define ADMV1014_REG_ADDR_WRITE_MSK GENMASK(22, 17)
+#define ADMV1014_REG_DATA_MSK GENMASK(16, 1)
+
+enum {
+ ADMV1014_IQ_MODE,
+ ADMV1014_IF_MODE
+};
+
+enum {
+ ADMV1014_SE_MODE_POS = 6,
+ ADMV1014_SE_MODE_NEG = 9,
+ ADMV1014_SE_MODE_DIFF = 12
+};
+
+enum {
+ ADMV1014_CALIBSCALE_COARSE,
+ ADMV1014_CALIBSCALE_FINE,
+};
+
+static const int detector_table[] = {0, 1, 2, 4, 8, 16, 32, 64};
+
+struct admv1014_state {
+ struct spi_device *spi;
+ struct clk *clkin;
+ struct notifier_block nb;
+ /* Protect against concurrent accesses to the device and to data*/
+ struct mutex lock;
+ struct regulator *vcm_reg;
+ struct regulator *vcc_if_bb_reg;
+ struct regulator *vcc_vga_reg;
+ struct regulator *vcc_vva_reg;
+ struct regulator *vcc_lna_3p3_reg;
+ struct regulator *vcc_lna_1p5_reg;
+ struct regulator *vcc_bg_reg;
+ struct regulator *vcc_quad_reg;
+ struct regulator *vcc_mixer_reg;
+ unsigned int input_mode;
+ unsigned int quad_se_mode;
+ unsigned int p1db_comp;
+ bool det_en;
+ u8 data[3] ____cacheline_aligned;
+};
+
+static const int mixer_vgate_table[] = {106, 107, 108, 110, 111, 112, 113, 114,
+ 117, 118, 119, 120, 122, 123, 44, 45};
+
+static int __admv1014_spi_read(struct admv1014_state *st, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+ struct spi_transfer t = {0};
+
+ st->data[0] = ADMV1014_READ | FIELD_PREP(ADMV1014_REG_ADDR_READ_MSK, reg);
+ st->data[1] = 0x0;
+ st->data[2] = 0x0;
+
+ t.rx_buf = &st->data[0];
+ t.tx_buf = &st->data[0];
+ t.len = 3;
+
+ ret = spi_sync_transfer(st->spi, &t, 1);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_REG_DATA_MSK, get_unaligned_be24(&st->data[0]));
+
+ return ret;
+}
+
+static int admv1014_spi_read(struct admv1014_state *st, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_read(st, reg, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int __admv1014_spi_write(struct admv1014_state *st,
+ unsigned int reg,
+ unsigned int val)
+{
+ put_unaligned_be24(FIELD_PREP(ADMV1014_REG_DATA_MSK, val) |
+ FIELD_PREP(ADMV1014_REG_ADDR_WRITE_MSK, reg), &st->data[0]);
+
+ return spi_write(st->spi, &st->data[0], 3);
+}
+
+static int admv1014_spi_write(struct admv1014_state *st, unsigned int reg,
+ unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_write(st, reg, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int __admv1014_spi_update_bits(struct admv1014_state *st, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+ unsigned int data, temp;
+
+ ret = __admv1014_spi_read(st, reg, &data);
+ if (ret)
+ return ret;
+
+ temp = (data & ~mask) | (val & mask);
+
+ return __admv1014_spi_write(st, reg, temp);
+}
+
+static int admv1014_spi_update_bits(struct admv1014_state *st, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = __admv1014_spi_update_bits(st, reg, mask, val);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int admv1014_update_quad_filters(struct admv1014_state *st)
+{
+ unsigned int filt_raw;
+ u64 rate = clk_get_rate(st->clkin);
+
+ if (rate >= (5400 * HZ_PER_MHZ) && rate <= (7000 * HZ_PER_MHZ))
+ filt_raw = 15;
+ else if (rate >= (5400 * HZ_PER_MHZ) && rate <= (8000 * HZ_PER_MHZ))
+ filt_raw = 10;
+ else if (rate >= (6600 * HZ_PER_MHZ) && rate <= (9200 * HZ_PER_MHZ))
+ filt_raw = 5;
+ else
+ filt_raw = 0;
+
+ return __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
+ ADMV1014_QUAD_FILTERS_MSK,
+ FIELD_PREP(ADMV1014_QUAD_FILTERS_MSK, filt_raw));
+}
+
+static int admv1014_update_vcm_settings(struct admv1014_state *st)
+{
+ unsigned int i, vcm_mv, vcm_comp, bb_sw_hl_cm;
+ int ret;
+
+ vcm_mv = regulator_get_voltage(st->vcm_reg) / 1000;
+ for (i = 0; i < ARRAY_SIZE(mixer_vgate_table); i++) {
+ vcm_comp = 1050 + (i * 50) + (i / 8 * 50);
+ if (vcm_mv != vcm_comp)
+ continue;
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_MIXER,
+ ADMV1014_MIXER_VGATE_MSK,
+ FIELD_PREP(ADMV1014_MIXER_VGATE_MSK,
+ mixer_vgate_table[i]));
+ if (ret)
+ return ret;
+
+ bb_sw_hl_cm = ~(i / 8);
+ bb_sw_hl_cm = FIELD_PREP(ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK, bb_sw_hl_cm);
+
+ return __admv1014_spi_update_bits(st, ADMV1014_REG_BB_AMP_AGC,
+ ADMV1014_BB_AMP_REF_GEN_MSK |
+ ADMV1014_BB_SWITCH_HIGH_LOW_CM_MSK,
+ FIELD_PREP(ADMV1014_BB_AMP_REF_GEN_MSK, i) |
+ bb_sw_hl_cm);
+ }
+
+ return -EINVAL;
+}
+
+static int admv1014_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long info)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data;
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_OFFSET:
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP_BB_AMP, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ *val = FIELD_GET(ADMV1014_BB_AMP_OFFSET_I_MSK, data);
+ else
+ *val = FIELD_GET(ADMV1014_BB_AMP_OFFSET_Q_MSK, data);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_PHASE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_LO_AMP_PHASE_ADJUST1, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ *val = FIELD_GET(ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK, data);
+ else
+ *val = FIELD_GET(ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK, data);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_MIXER, &data);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_DET_PROG_MSK, data);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_BB_AMP_AGC, &data);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(ADMV1014_BB_AMP_GAIN_CTRL_MSK, data);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int admv1014_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long info)
+{
+ int data;
+ unsigned int msk;
+ struct admv1014_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_OFFSET:
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_BB_AMP_OFFSET_I_MSK;
+ data = FIELD_PREP(ADMV1014_BB_AMP_OFFSET_I_MSK, val);
+ } else {
+ msk = ADMV1014_BB_AMP_OFFSET_Q_MSK;
+ data = FIELD_PREP(ADMV1014_BB_AMP_OFFSET_Q_MSK, val);
+ }
+
+ return admv1014_spi_update_bits(st, ADMV1014_REG_IF_AMP_BB_AMP, msk, data);
+ case IIO_CHAN_INFO_PHASE:
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK;
+ data = FIELD_PREP(ADMV1014_LOAMP_PH_ADJ_I_FINE_MSK, val);
+ } else {
+ msk = ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK;
+ data = FIELD_PREP(ADMV1014_LOAMP_PH_ADJ_Q_FINE_MSK, val);
+ }
+
+ return admv1014_spi_update_bits(st, ADMV1014_REG_LO_AMP_PHASE_ADJUST1, msk, data);
+ case IIO_CHAN_INFO_SCALE:
+ return admv1014_spi_update_bits(st, ADMV1014_REG_MIXER,
+ ADMV1014_DET_PROG_MSK,
+ FIELD_PREP(ADMV1014_DET_PROG_MSK, val));
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return admv1014_spi_update_bits(st, ADMV1014_REG_BB_AMP_AGC,
+ ADMV1014_BB_AMP_GAIN_CTRL_MSK,
+ FIELD_PREP(ADMV1014_BB_AMP_GAIN_CTRL_MSK, val));
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t admv1014_read(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data;
+ int ret;
+
+ switch ((u32)private) {
+ case ADMV1014_CALIBSCALE_COARSE:
+ if (chan->channel2 == IIO_MOD_I) {
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP, &data);
+ if (ret)
+ return ret;
+
+ data = FIELD_GET(ADMV1014_IF_AMP_COARSE_GAIN_I_MSK, data);
+ } else {
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP_BB_AMP, &data);
+ if (ret)
+ return ret;
+
+ data = FIELD_GET(ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK, data);
+ }
+ break;
+ case ADMV1014_CALIBSCALE_FINE:
+ ret = admv1014_spi_read(st, ADMV1014_REG_IF_AMP, &data);
+ if (ret)
+ return ret;
+
+ if (chan->channel2 == IIO_MOD_I)
+ data = FIELD_GET(ADMV1014_IF_AMP_FINE_GAIN_I_MSK, data);
+ else
+ data = FIELD_GET(ADMV1014_IF_AMP_FINE_GAIN_Q_MSK, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", data);
+}
+
+static ssize_t admv1014_write(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+ unsigned int data, addr, msk;
+ int ret;
+
+ ret = kstrtou32(buf, 10, &data);
+ if (ret)
+ return ret;
+
+ switch ((u32)private) {
+ case ADMV1014_CALIBSCALE_COARSE:
+ if (chan->channel2 == IIO_MOD_I) {
+ addr = ADMV1014_REG_IF_AMP;
+ msk = ADMV1014_IF_AMP_COARSE_GAIN_I_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_COARSE_GAIN_I_MSK, data);
+ } else {
+ addr = ADMV1014_REG_IF_AMP_BB_AMP;
+ msk = ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_COARSE_GAIN_Q_MSK, data);
+ }
+ break;
+ case ADMV1014_CALIBSCALE_FINE:
+ addr = ADMV1014_REG_IF_AMP;
+
+ if (chan->channel2 == IIO_MOD_I) {
+ msk = ADMV1014_IF_AMP_FINE_GAIN_I_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_FINE_GAIN_I_MSK, data);
+ } else {
+ msk = ADMV1014_IF_AMP_FINE_GAIN_Q_MSK;
+ data = FIELD_PREP(ADMV1014_IF_AMP_FINE_GAIN_Q_MSK, data);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = admv1014_spi_update_bits(st, addr, msk, data);
+
+ return ret ? ret : len;
+}
+
+static int admv1014_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_SCALE:
+ *vals = detector_table;
+ *type = IIO_VAL_INT;
+ *length = ARRAY_SIZE(detector_table);
+
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int admv1014_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int write_val,
+ unsigned int *read_val)
+{
+ struct admv1014_state *st = iio_priv(indio_dev);
+
+ if (read_val)
+ return admv1014_spi_read(st, reg, read_val);
+ else
+ return admv1014_spi_write(st, reg, write_val);
+}
+
+static const struct iio_info admv1014_info = {
+ .read_raw = admv1014_read_raw,
+ .write_raw = admv1014_write_raw,
+ .read_avail = &admv1014_read_avail,
+ .debugfs_reg_access = &admv1014_reg_access,
+};
+
+static int admv1014_freq_change(struct notifier_block *nb, unsigned long action, void *data)
+{
+ struct admv1014_state *st = container_of(nb, struct admv1014_state, nb);
+ int ret;
+
+ if (action == POST_RATE_CHANGE) {
+ mutex_lock(&st->lock);
+ ret = notifier_from_errno(admv1014_update_quad_filters(st));
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+
+ return NOTIFY_OK;
+}
+
+#define _ADMV1014_EXT_INFO(_name, _shared, _ident) { \
+ .name = _name, \
+ .read = admv1014_read, \
+ .write = admv1014_write, \
+ .private = _ident, \
+ .shared = _shared, \
+}
+
+static const struct iio_chan_spec_ext_info admv1014_ext_info[] = {
+ _ADMV1014_EXT_INFO("calibscale_coarse", IIO_SEPARATE, ADMV1014_CALIBSCALE_COARSE),
+ _ADMV1014_EXT_INFO("calibscale_fine", IIO_SEPARATE, ADMV1014_CALIBSCALE_FINE),
+ { }
+};
+
+#define ADMV1014_CHAN_IQ(_channel, rf_comp) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PHASE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBSCALE) \
+ }
+
+#define ADMV1014_CHAN_IF(_channel, rf_comp) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PHASE) | \
+ BIT(IIO_CHAN_INFO_OFFSET) \
+ }
+
+#define ADMV1014_CHAN_POWER(_channel) { \
+ .type = IIO_POWER, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel = _channel, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE) \
+ }
+
+#define ADMV1014_CHAN_CALIBSCALE(_channel, rf_comp, _admv1014_ext_info) { \
+ .type = IIO_ALTVOLTAGE, \
+ .modified = 1, \
+ .output = 0, \
+ .indexed = 1, \
+ .channel2 = IIO_MOD_##rf_comp, \
+ .channel = _channel, \
+ .ext_info = _admv1014_ext_info \
+ }
+
+static const struct iio_chan_spec admv1014_channels_iq[] = {
+ ADMV1014_CHAN_IQ(0, I),
+ ADMV1014_CHAN_IQ(0, Q),
+ ADMV1014_CHAN_POWER(0)
+};
+
+static const struct iio_chan_spec admv1014_channels_if[] = {
+ ADMV1014_CHAN_IF(0, I),
+ ADMV1014_CHAN_IF(0, Q),
+ ADMV1014_CHAN_CALIBSCALE(0, I, admv1014_ext_info),
+ ADMV1014_CHAN_CALIBSCALE(0, Q, admv1014_ext_info),
+ ADMV1014_CHAN_POWER(0)
+};
+
+static void admv1014_clk_disable(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static void admv1014_reg_disable(void *data)
+{
+ regulator_disable(data);
+}
+
+static void admv1014_powerdown(void *data)
+{
+ unsigned int enable_reg, enable_reg_msk;
+
+ /* Disable all components in the Enable Register */
+ enable_reg_msk = ADMV1014_IBIAS_PD_MSK |
+ ADMV1014_IF_AMP_PD_MSK |
+ ADMV1014_QUAD_BG_PD_MSK |
+ ADMV1014_BB_AMP_PD_MSK |
+ ADMV1014_QUAD_IBIAS_PD_MSK |
+ ADMV1014_BG_PD_MSK;
+
+ enable_reg = FIELD_PREP(ADMV1014_IBIAS_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_IF_AMP_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_QUAD_BG_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_BB_AMP_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_QUAD_IBIAS_PD_MSK, 1) |
+ FIELD_PREP(ADMV1014_BG_PD_MSK, 1);
+
+ admv1014_spi_update_bits(data, ADMV1014_REG_ENABLE,
+ enable_reg_msk, enable_reg);
+}
+
+static int admv1014_init(struct admv1014_state *st)
+{
+ int ret;
+ unsigned int chip_id, enable_reg, enable_reg_msk;
+ struct spi_device *spi = st->spi;
+
+ ret = regulator_enable(st->vcm_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Common-Mode Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcm_reg);
+ if (ret)
+ return ret;
+
+ if (st->vcc_if_bb_reg) {
+ ret = regulator_enable(st->vcc_if_bb_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable BB and IF Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_if_bb_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_vga_reg) {
+ ret = regulator_enable(st->vcc_vga_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable RF Amplifier Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_vga_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_vva_reg) {
+ ret = regulator_enable(st->vcc_vva_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable VVA Control Circuit Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_vva_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_lna_3p3_reg) {
+ ret = regulator_enable(st->vcc_lna_3p3_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Low Noise Amplifier 3.3V Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_lna_3p3_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_lna_1p5_reg) {
+ ret = regulator_enable(st->vcc_lna_1p5_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Low Noise Amplifier 1.5V Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_lna_1p5_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_bg_reg) {
+ ret = regulator_enable(st->vcc_bg_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Band Gap Circuit Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_bg_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_quad_reg) {
+ ret = regulator_enable(st->vcc_quad_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Quadruple Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_quad_reg);
+ if (ret)
+ return ret;
+ }
+
+ if (st->vcc_mixer_reg) {
+ ret = regulator_enable(st->vcc_mixer_reg);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable Mixer Voltage!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->vcc_mixer_reg);
+ if (ret)
+ return ret;
+ }
+
+ ret = clk_prepare_enable(st->clkin);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_clk_disable, st->clkin);
+ if (ret)
+ return ret;
+
+ st->nb.notifier_call = admv1014_freq_change;
+ ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(&spi->dev, admv1014_powerdown, st);
+ if (ret)
+ return ret;
+
+ /* Perform a software reset */
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
+ ADMV1014_SPI_SOFT_RESET_MSK,
+ FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 1));
+ if (ret) {
+ dev_err(&spi->dev, "ADMV1014 SPI software reset failed.\n");
+ return ret;
+ }
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
+ ADMV1014_SPI_SOFT_RESET_MSK,
+ FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 0));
+ if (ret) {
+ dev_err(&spi->dev, "ADMV1014 SPI software reset disable failed.\n");
+ return ret;
+ }
+
+ ret = __admv1014_spi_write(st, ADMV1014_REG_VVA_TEMP_COMP, 0x727C);
+ if (ret) {
+ dev_err(&spi->dev, "Writing default Temperature Compensation value failed.\n");
+ return ret;
+ }
+
+ ret = __admv1014_spi_read(st, ADMV1014_REG_SPI_CONTROL, &chip_id);
+ if (ret)
+ return ret;
+
+ chip_id = (chip_id & ADMV1014_CHIP_ID_MSK) >> 4;
+ if (chip_id != ADMV1014_CHIP_ID) {
+ dev_err(&spi->dev, "Invalid Chip ID.\n");
+ return -EINVAL;
+ }
+
+ ret = __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
+ ADMV1014_QUAD_SE_MODE_MSK,
+ FIELD_PREP(ADMV1014_QUAD_SE_MODE_MSK,
+ st->quad_se_mode));
+ if (ret) {
+ dev_err(&spi->dev, "Writing Quad SE Mode failed.\n");
+ return ret;
+ }
+
+ ret = admv1014_update_quad_filters(st);
+ if (ret) {
+ dev_err(&spi->dev, "Update Quad Filters failed.\n");
+ return ret;
+ }
+
+ ret = admv1014_update_vcm_settings(st);
+ if (ret) {
+ dev_err(&spi->dev, "Update VCM Settings failed.\n");
+ return ret;
+ }
+
+ enable_reg_msk = ADMV1014_P1DB_COMPENSATION_MSK |
+ ADMV1014_IF_AMP_PD_MSK |
+ ADMV1014_BB_AMP_PD_MSK |
+ ADMV1014_DET_EN_MSK;
+
+ enable_reg = FIELD_PREP(ADMV1014_P1DB_COMPENSATION_MSK, st->p1db_comp ? 3 : 0) |
+ FIELD_PREP(ADMV1014_IF_AMP_PD_MSK, !(st->input_mode)) |
+ FIELD_PREP(ADMV1014_BB_AMP_PD_MSK, st->input_mode) |
+ FIELD_PREP(ADMV1014_DET_EN_MSK, st->det_en);
+
+ return __admv1014_spi_update_bits(st, ADMV1014_REG_ENABLE, enable_reg_msk, enable_reg);
+}
+
+static int admv1014_properties_parse(struct admv1014_state *st)
+{
+ const char *str;
+ struct spi_device *spi = st->spi;
+
+ st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
+
+ st->p1db_comp = device_property_read_bool(&spi->dev, "adi,p1db-compensation-enable");
+
+ str = "iq";
+ device_property_read_string(&spi->dev, "adi,input-mode", &str);
+
+ if (!strcmp(str, "iq"))
+ st->input_mode = ADMV1014_IQ_MODE;
+ else if (!strcmp(str, "if"))
+ st->input_mode = ADMV1014_IF_MODE;
+ else
+ return -EINVAL;
+
+ str = "diff";
+ device_property_read_string(&spi->dev, "adi,quad-se-mode", &str);
+
+ if (!strcmp(str, "diff"))
+ st->quad_se_mode = ADMV1014_SE_MODE_DIFF;
+ else if (!strcmp(str, "se-pos"))
+ st->quad_se_mode = ADMV1014_SE_MODE_POS;
+ else if (!strcmp(str, "se-neg"))
+ st->quad_se_mode = ADMV1014_SE_MODE_NEG;
+ else
+ return -EINVAL;
+
+ st->vcm_reg = devm_regulator_get(&spi->dev, "vcm");
+ if (IS_ERR(st->vcm_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcm_reg),
+ "failed to get the common-mode voltage\n");
+
+ st->vcc_if_bb_reg = devm_regulator_get_optional(&spi->dev, "vcc-if-bb");
+ if (IS_ERR(st->vcc_if_bb_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_if_bb_reg),
+ "failed to get the BB and IF supply\n");
+
+ st->vcc_vga_reg = devm_regulator_get_optional(&spi->dev, "vcc-vga");
+ if (IS_ERR(st->vcc_vga_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_vga_reg),
+ "failed to get the RF Amplifier supply\n");
+
+ st->vcc_vva_reg = devm_regulator_get_optional(&spi->dev, "vcc-vva");
+ if (IS_ERR(st->vcc_vva_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_vva_reg),
+ "failed to get the VVA Control Circuit supply\n");
+
+ st->vcc_lna_3p3_reg = devm_regulator_get_optional(&spi->dev, "vcc-lna-3p3");
+ if (IS_ERR(st->vcc_lna_3p3_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_lna_3p3_reg),
+ "failed to get the Low Noise Amplifier 3.3V supply\n");
+
+ st->vcc_lna_1p5_reg = devm_regulator_get_optional(&spi->dev, "vcc-lna-1p5");
+ if (IS_ERR(st->vcc_lna_1p5_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_lna_1p5_reg),
+ "failed to get the Low Noise Amplifier 1.5V supply\n");
+
+ st->vcc_bg_reg = devm_regulator_get_optional(&spi->dev, "vcc-bg");
+ if (IS_ERR(st->vcc_lna_1p5_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_bg_reg),
+ "failed to get the Band Gap Circuit supply\n");
+
+ st->vcc_quad_reg = devm_regulator_get_optional(&spi->dev, "vcc-quad");
+ if (IS_ERR(st->vcc_quad_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_quad_reg),
+ "failed to get the Quadruple supply\n");
+
+ st->vcc_mixer_reg = devm_regulator_get_optional(&spi->dev, "vcc-mixer");
+ if (IS_ERR(st->vcc_quad_reg))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->vcc_mixer_reg),
+ "failed to get the Mixer supply\n");
+
+ st->clkin = devm_clk_get(&spi->dev, "lo_in");
+ if (IS_ERR(st->clkin))
+ return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
+ "failed to get the LO input clock\n");
+
+ return 0;
+}
+
+static int admv1014_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct admv1014_state *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ ret = admv1014_properties_parse(st);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &admv1014_info;
+ indio_dev->name = "admv1014";
+
+ if (st->input_mode == ADMV1014_IQ_MODE) {
+ indio_dev->channels = admv1014_channels_iq;
+ indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_iq);
+ } else {
+ indio_dev->channels = admv1014_channels_if;
+ indio_dev->num_channels = ARRAY_SIZE(admv1014_channels_if);
+ }
+
+ st->spi = spi;
+
+ mutex_init(&st->lock);
+
+ ret = admv1014_init(st);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id admv1014_id[] = {
+ { "admv1014", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, admv1014_id);
+
+static const struct of_device_id admv1014_of_match[] = {
+ { .compatible = "adi,admv1014" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, admv1014_of_match);
+
+static struct spi_driver admv1014_driver = {
+ .driver = {
+ .name = "admv1014",
+ .of_match_table = admv1014_of_match,
+ },
+ .probe = admv1014_probe,
+ .id_table = admv1014_id,
+};
+module_spi_driver(admv1014_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com");
+MODULE_DESCRIPTION("Analog Devices ADMV1014");
+MODULE_LICENSE("GPL v2");
--
2.34.1