415 lines
9.0 KiB
C
415 lines
9.0 KiB
C
/*
|
|
* Copyright (c) 2020 M2I Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <zephyr.h>
|
|
#include <drivers/spi.h>
|
|
#include <drivers/dac.h>
|
|
#include <logging/log.h>
|
|
#include <dt-bindings/dac/dacx0508.h>
|
|
|
|
LOG_MODULE_REGISTER(dac_dacx0508, CONFIG_DAC_LOG_LEVEL);
|
|
|
|
#define DACX0508_REG_DEVICE_ID 0x01U
|
|
#define DACX0508_REG_CONFIG 0x03U
|
|
#define DACX0508_REG_GAIN 0x04U
|
|
#define DACX0508_REG_TRIGGER 0x05U
|
|
#define DACX0508_REG_STATUS 0x07U
|
|
#define DACX0508_REG_DAC0 0x08U
|
|
|
|
#define DACX0508_MASK_DEVICE_ID_8CH BIT(11)
|
|
#define DACX0508_MASK_CONFIG_REF_PWDWN BIT(8)
|
|
#define DACX0508_MASK_GAIN_BUFF_GAIN(x) BIT(x)
|
|
#define DACX0508_MASK_GAIN_REFDIV_EN BIT(8)
|
|
#define DACX0508_MASK_TRIGGER_SOFT_RESET (BIT(1) | BIT(3))
|
|
#define DACX0508_MASK_STATUS_REF_ALM BIT(0)
|
|
|
|
#define DACX0508_READ_CMD 0x80
|
|
#define DACX0508_POR_DELAY 250
|
|
#define DACX0508_MAX_CHANNEL 8
|
|
|
|
struct dacx0508_config {
|
|
struct spi_dt_spec bus;
|
|
uint8_t resolution;
|
|
uint8_t reference;
|
|
uint8_t gain[8];
|
|
};
|
|
|
|
struct dacx0508_data {
|
|
uint8_t configured;
|
|
};
|
|
|
|
static int dacx0508_reg_read(const struct device *dev, uint8_t addr,
|
|
uint8_t *data)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
const struct spi_buf buf[2] = {
|
|
{
|
|
.buf = &addr,
|
|
.len = sizeof(addr)
|
|
},
|
|
{
|
|
.buf = data,
|
|
.len = 2
|
|
}
|
|
};
|
|
struct spi_buf_set tx = {
|
|
.buffers = buf,
|
|
.count = ARRAY_SIZE(buf),
|
|
};
|
|
struct spi_buf_set rx = {
|
|
.buffers = buf,
|
|
.count = ARRAY_SIZE(buf)
|
|
};
|
|
uint8_t tmp;
|
|
int ret;
|
|
|
|
if (k_is_in_isr()) {
|
|
/* Prevent SPI transactions from an ISR */
|
|
return -EWOULDBLOCK;
|
|
}
|
|
|
|
tmp = addr |= DACX0508_READ_CMD;
|
|
|
|
ret = spi_write_dt(&config->bus, &tx);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
ret = spi_read_dt(&config->bus, &rx);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
if (addr != tmp) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_reg_write(const struct device *dev, uint8_t addr,
|
|
uint8_t *data)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
const struct spi_buf buf[2] = {
|
|
{
|
|
.buf = &addr,
|
|
.len = sizeof(addr)
|
|
},
|
|
{
|
|
.buf = data,
|
|
.len = 2
|
|
}
|
|
};
|
|
struct spi_buf_set tx = {
|
|
.buffers = buf,
|
|
.count = ARRAY_SIZE(buf),
|
|
};
|
|
|
|
if (k_is_in_isr()) {
|
|
/* Prevent SPI transactions from an ISR */
|
|
return -EWOULDBLOCK;
|
|
}
|
|
|
|
return spi_write_dt(&config->bus, &tx);
|
|
}
|
|
|
|
int dacx0508_reg_update(const struct device *dev, uint8_t addr,
|
|
uint16_t mask, bool setting)
|
|
{
|
|
uint8_t regval[2] = {0, };
|
|
uint16_t tmp;
|
|
int ret;
|
|
|
|
ret = dacx0508_reg_read(dev, addr, regval);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
tmp = (regval[0] << 8) | regval[1];
|
|
|
|
if (setting) {
|
|
tmp |= mask;
|
|
} else {
|
|
tmp &= ~mask;
|
|
}
|
|
|
|
regval[0] = tmp >> 8;
|
|
regval[1] = tmp & 0xFF;
|
|
|
|
ret = dacx0508_reg_write(dev, addr, regval);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_channel_setup(const struct device *dev,
|
|
const struct dac_channel_cfg *channel_cfg)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
struct dacx0508_data *data = dev->data;
|
|
|
|
if (channel_cfg->channel_id > DACX0508_MAX_CHANNEL - 1) {
|
|
LOG_ERR("Unsupported channel %d", channel_cfg->channel_id);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (channel_cfg->resolution != config->resolution) {
|
|
LOG_ERR("Unsupported resolution %d", channel_cfg->resolution);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
data->configured |= BIT(channel_cfg->channel_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_write_value(const struct device *dev, uint8_t channel,
|
|
uint32_t value)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
struct dacx0508_data *data = dev->data;
|
|
uint8_t regval[2];
|
|
int ret;
|
|
|
|
if (channel > DACX0508_MAX_CHANNEL - 1) {
|
|
LOG_ERR("unsupported channel %d", channel);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (!(data->configured & BIT(channel))) {
|
|
LOG_ERR("Channel not initialized");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (value >= (1 << config->resolution)) {
|
|
LOG_ERR("Value %d out of range", value);
|
|
return -EINVAL;
|
|
}
|
|
|
|
value <<= (16 - config->resolution);
|
|
regval[0] = value >> 8;
|
|
regval[1] = value & 0xFF;
|
|
|
|
ret = dacx0508_reg_write(dev, DACX0508_REG_DAC0 + channel, regval);
|
|
if (ret) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_soft_reset(const struct device *dev)
|
|
{
|
|
uint8_t regval[2] = {0, DACX0508_MASK_TRIGGER_SOFT_RESET};
|
|
int ret;
|
|
|
|
ret = dacx0508_reg_write(dev, DACX0508_REG_TRIGGER, regval);
|
|
if (ret) {
|
|
return -EIO;
|
|
}
|
|
k_usleep(DACX0508_POR_DELAY);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_device_id_check(const struct device *dev)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
uint8_t regval[2] = {0, };
|
|
uint8_t resolution;
|
|
uint16_t dev_id;
|
|
int ret;
|
|
|
|
ret = dacx0508_reg_read(dev, DACX0508_REG_DEVICE_ID, regval);
|
|
if (ret) {
|
|
LOG_ERR("Unable to read Device ID");
|
|
return -EIO;
|
|
}
|
|
dev_id = (regval[0] << 8) | regval[1];
|
|
|
|
resolution = dev_id >> 12;
|
|
if (resolution != (16 - config->resolution) >> 1) {
|
|
LOG_ERR("Not match chip resolution");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((dev_id & DACX0508_MASK_DEVICE_ID_8CH) !=
|
|
DACX0508_MASK_DEVICE_ID_8CH) {
|
|
LOG_ERR("Support channels mismatch");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_setup(const struct device *dev)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
uint8_t regval[2] = {0, }, tmp = 0;
|
|
bool ref_pwdwn, refdiv_en;
|
|
int ret;
|
|
|
|
switch (config->reference) {
|
|
case DACX0508_REF_INTERNAL_1:
|
|
ref_pwdwn = false;
|
|
refdiv_en = false;
|
|
break;
|
|
case DACX0508_REF_INTERNAL_1_2:
|
|
ref_pwdwn = false;
|
|
refdiv_en = true;
|
|
break;
|
|
case DACX0508_REF_EXTERNAL_1:
|
|
ref_pwdwn = true;
|
|
refdiv_en = false;
|
|
break;
|
|
case DACX0508_REF_EXTERNAL_1_2:
|
|
ref_pwdwn = true;
|
|
refdiv_en = true;
|
|
break;
|
|
default:
|
|
LOG_ERR("unsupported channel reference type '%d'",
|
|
config->reference);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
ret = dacx0508_reg_update(dev, DACX0508_REG_CONFIG,
|
|
DACX0508_MASK_CONFIG_REF_PWDWN, ref_pwdwn);
|
|
if (ret) {
|
|
LOG_ERR("GAIN Register update failed");
|
|
return -EIO;
|
|
}
|
|
|
|
ret = dacx0508_reg_update(dev, DACX0508_REG_GAIN,
|
|
DACX0508_MASK_GAIN_REFDIV_EN, refdiv_en);
|
|
if (ret) {
|
|
LOG_ERR("GAIN Register update failed");
|
|
return -EIO;
|
|
}
|
|
|
|
|
|
for (int i = 0; i < 8; i++) {
|
|
tmp |= config->gain[i] << i;
|
|
}
|
|
|
|
ret = dacx0508_reg_read(dev, DACX0508_REG_GAIN, regval);
|
|
if (ret) {
|
|
LOG_ERR("Unable to read GAIN Register");
|
|
return -EIO;
|
|
}
|
|
|
|
regval[1] = tmp;
|
|
ret = dacx0508_reg_write(dev, DACX0508_REG_GAIN, regval);
|
|
if (ret) {
|
|
LOG_ERR("Unable to write GAIN Register");
|
|
return -EIO;
|
|
}
|
|
|
|
ret = dacx0508_reg_read(dev, DACX0508_REG_STATUS, regval);
|
|
if (ret) {
|
|
LOG_ERR("Unable to read STATUS Register");
|
|
return -EIO;
|
|
}
|
|
if ((regval[1] & DACX0508_MASK_STATUS_REF_ALM) ==
|
|
DACX0508_MASK_STATUS_REF_ALM) {
|
|
LOG_ERR("Difference between VREF/DIV and VDD is "
|
|
"below the required minimum analog threshold");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dacx0508_init(const struct device *dev)
|
|
{
|
|
const struct dacx0508_config *config = dev->config;
|
|
struct dacx0508_data *data = dev->data;
|
|
int ret;
|
|
|
|
if (!spi_is_ready(&config->bus)) {
|
|
LOG_ERR("SPI bus %s not ready", config->bus.bus->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = dacx0508_soft_reset(dev);
|
|
if (ret) {
|
|
LOG_ERR("Soft-reset failed");
|
|
return ret;
|
|
}
|
|
|
|
ret = dacx0508_device_id_check(dev);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
ret = dacx0508_setup(dev);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
data->configured = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dac_driver_api dacx0508_driver_api = {
|
|
.channel_setup = dacx0508_channel_setup,
|
|
.write_value = dacx0508_write_value,
|
|
};
|
|
|
|
#define INST_DT_DACX0508(inst, t) DT_INST(inst, ti_dac##t)
|
|
|
|
#define DACX0508_DEVICE(t, n, res) \
|
|
static struct dacx0508_data dac##t##_data_##n; \
|
|
static const struct dacx0508_config dac##t##_config_##n = { \
|
|
.bus = SPI_DT_SPEC_GET(INST_DT_DACX0508(n, t), \
|
|
SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | \
|
|
SPI_WORD_SET(8) | SPI_MODE_CPHA, 0), \
|
|
.resolution = res, \
|
|
.reference = DT_PROP(INST_DT_DACX0508(n, t), \
|
|
voltage_reference), \
|
|
.gain[0] = DT_PROP(INST_DT_DACX0508(n, t), channel0_gain), \
|
|
.gain[1] = DT_PROP(INST_DT_DACX0508(n, t), channel1_gain), \
|
|
.gain[2] = DT_PROP(INST_DT_DACX0508(n, t), channel2_gain), \
|
|
.gain[3] = DT_PROP(INST_DT_DACX0508(n, t), channel3_gain), \
|
|
.gain[4] = DT_PROP(INST_DT_DACX0508(n, t), channel4_gain), \
|
|
.gain[5] = DT_PROP(INST_DT_DACX0508(n, t), channel5_gain), \
|
|
.gain[6] = DT_PROP(INST_DT_DACX0508(n, t), channel6_gain), \
|
|
.gain[7] = DT_PROP(INST_DT_DACX0508(n, t), channel7_gain), \
|
|
}; \
|
|
DEVICE_DT_DEFINE(INST_DT_DACX0508(n, t), \
|
|
&dacx0508_init, NULL, \
|
|
&dac##t##_data_##n, \
|
|
&dac##t##_config_##n, POST_KERNEL, \
|
|
CONFIG_DAC_DACX0508_INIT_PRIORITY, \
|
|
&dacx0508_driver_api)
|
|
|
|
/*
|
|
* DAC60508: 12-bit
|
|
*/
|
|
#define DAC60508_DEVICE(n) DACX0508_DEVICE(60508, n, 12)
|
|
|
|
/*
|
|
* DAC70508: 14-bit
|
|
*/
|
|
#define DAC70508_DEVICE(n) DACX0508_DEVICE(70508, n, 14)
|
|
|
|
/*
|
|
* DAC80508: 16-bit
|
|
*/
|
|
#define DAC80508_DEVICE(n) DACX0508_DEVICE(80508, n, 16)
|
|
|
|
#define CALL_WITH_ARG(arg, expr) expr(arg)
|
|
|
|
#define INST_DT_DACX0508_FOREACH(t, inst_expr) \
|
|
UTIL_LISTIFY(DT_NUM_INST_STATUS_OKAY(ti_dac##t), \
|
|
CALL_WITH_ARG, inst_expr)
|
|
|
|
INST_DT_DACX0508_FOREACH(60508, DAC60508_DEVICE);
|
|
INST_DT_DACX0508_FOREACH(70508, DAC70508_DEVICE);
|
|
INST_DT_DACX0508_FOREACH(80508, DAC80508_DEVICE);
|