Diff: noos_mbed/drivers/adc-dac/ad5592r/ad5592r-base.c

Revision:

0:e8a1ba50c46b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/noos_mbed/drivers/adc-dac/ad5592r/ad5592r-base.c	Thu Jan 14 19:12:57 2021 +0530
@@ -0,0 +1,328 @@
+/***************************************************************************//**
+ *   @file   ad5592r-base.c
+ *   @brief  Implementation of AD5592R Base Driver.
+ *   @author Mircea Caprioru (mircea.caprioru@analog.com)
+********************************************************************************
+ * Copyright 2018, 2020(c) Analog Devices, Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  - Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *  - The use of this software may or may not infringe the patent rights
+ *    of one or more patent holders.  This license does not release you
+ *    from the requirement that you obtain separate licenses from these
+ *    patent holders to use this software.
+ *  - Use of the software either in source or binary form, must be run
+ *    on or directly connected to an Analog Devices Inc. component.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*******************************************************************************/
+#include "error.h"
+#include "ad5592r-base.h"
+
+/**
+ * Write register.
+ *
+ * @param dev - The device structure.
+ * @param reg - The register address.
+ * @param value - register value
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_base_reg_write(struct ad5592r_dev *dev, uint8_t reg,
+			       uint16_t value)
+{
+	return dev->ops->reg_write(dev, reg, value);
+}
+
+/**
+ * Read register.
+ *
+ * @param dev - The device structure.
+ * @param reg - The register address.
+ * @param value - register value
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_base_reg_read(struct ad5592r_dev *dev, uint8_t reg,
+			      uint16_t *value)
+{
+	return dev->ops->reg_read(dev, reg, value);
+}
+
+/**
+ * Get GPIO value
+ *
+ * @param dev - The device structure.
+ * @param offset - The channel number.
+ * @return 0 or 1 depending on the GPIO value.
+ */
+int32_t ad5592r_gpio_get(struct ad5592r_dev *dev, uint8_t offset)
+{
+	int32_t ret = 0;
+	uint8_t val;
+
+	if (!dev)
+		return FAILURE;
+
+	if (dev->gpio_out & BIT(offset))
+		val = dev->gpio_val;
+	else
+		ret = dev->ops->gpio_read(dev, &val);
+
+	if (ret < 0)
+		return ret;
+
+	return !!(val & BIT(offset));
+}
+
+/**
+ * Set GPIO value
+ *
+ * @param dev - The device structure.
+ * @param offset - The channel number.
+ * @param value - the GPIO value (0 or 1)
+ */
+int32_t ad5592r_gpio_set(struct ad5592r_dev *dev, uint8_t offset, int32_t value)
+{
+	if (!dev)
+		return FAILURE;
+
+	if (value)
+		dev->gpio_val |= BIT(offset);
+	else
+		dev->gpio_val &= ~BIT(offset);
+
+	return ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_SET,
+				      dev->gpio_val);
+}
+
+/**
+ * Set GPIO as input
+ *
+ * @param dev - The device structure.
+ * @param offset - The channel number.
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_gpio_direction_input(struct ad5592r_dev *dev, uint8_t offset)
+{
+	int32_t ret;
+
+	if (!dev)
+		return FAILURE;
+
+	dev->gpio_out &= ~BIT(offset);
+	dev->gpio_in |= BIT(offset);
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_OUT_EN,
+				     dev->gpio_out);
+	if (ret < 0)
+		return ret;
+
+	return ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_IN_EN,
+				      dev->gpio_in);
+}
+
+/**
+ * Set GPIO as output
+ *
+ * @param dev - The device structure.
+ * @param offset - The channel number.
+ * @param value - GPIO value to set.
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_gpio_direction_output(struct ad5592r_dev *dev,
+				      uint8_t offset, int32_t value)
+{
+	int32_t ret;
+
+	if (!dev)
+		return FAILURE;
+
+	if (value)
+		dev->gpio_val |= BIT(offset);
+	else
+		dev->gpio_val &= ~BIT(offset);
+
+	dev->gpio_in &= ~BIT(offset);
+	dev->gpio_out |= BIT(offset);
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_SET, dev->gpio_val);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_OUT_EN,
+				     dev->gpio_out);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_IN_EN,
+				     dev->gpio_in);
+
+	return ret;
+}
+
+/**
+ * Software reset device.
+ *
+ * @param dev - The device structure.
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_software_reset(struct ad5592r_dev *dev)
+{
+	int32_t ret;
+
+	if (!dev)
+		return FAILURE;
+
+	/* Writing this magic value resets the device */
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_RESET, 0xdac);
+
+	mdelay(10);
+
+	return ret;
+}
+
+/**
+ * Set channels modes.
+ *
+ * @param dev - The device structure.
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_set_channel_modes(struct ad5592r_dev *dev)
+{
+	int32_t ret;
+	uint8_t i;
+	uint8_t pulldown = 0, tristate = 0, dac = 0, adc = 0;
+	uint16_t read_back;
+
+	if (!dev)
+		return FAILURE;
+
+	dev->gpio_in = 0;
+	dev->gpio_out = 0;
+
+	for (i = 0; i < dev->num_channels; i++) {
+		switch (dev->channel_modes[i]) {
+		case CH_MODE_DAC:
+			dac |= BIT(i);
+			break;
+
+		case CH_MODE_ADC:
+			adc |= BIT(i);
+			break;
+
+		case CH_MODE_DAC_AND_ADC:
+			dac |= BIT(i);
+			adc |= BIT(i);
+			break;
+
+		case CH_MODE_GPI:
+			dev->gpio_in |= BIT(i);
+			break;
+
+		case CH_MODE_GPO:
+			dev->gpio_out |= BIT(i);
+			break;
+
+		case CH_MODE_UNUSED:
+		/* fall-through */
+		default:
+			switch (dev->channel_offstate[i]) {
+			case CH_OFFSTATE_OUT_TRISTATE:
+				tristate |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_OUT_LOW:
+				dev->gpio_out |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_OUT_HIGH:
+				dev->gpio_out |= BIT(i);
+				dev->gpio_val |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_PULLDOWN:
+			/* fall-through */
+			default:
+				pulldown |= BIT(i);
+				break;
+			}
+		}
+	}
+
+	/* Pull down unused pins to GND */
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_PULLDOWN, pulldown);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_TRISTATE, tristate);
+	if (ret < 0)
+		return ret;
+
+	/* Configure pins that we use */
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_DAC_EN, dac);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_ADC_EN, adc);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_SET, dev->gpio_val);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_OUT_EN,
+				     dev->gpio_out);
+	if (ret < 0)
+		return ret;
+
+	ret = ad5592r_base_reg_write(dev, AD5592R_REG_GPIO_IN_EN,
+				     dev->gpio_in);
+	if (ret < 0)
+		return ret;
+
+	/* Verify that we can read back at least one register */
+	ret = ad5592r_base_reg_read(dev, AD5592R_REG_ADC_EN, &read_back);
+	if (!ret && (read_back & 0xff) != adc)
+		return FAILURE;
+
+	return ret;
+}
+
+/**
+ * Reset channels and set GPIO to unused.
+ *
+ * @param dev - The device structure.
+ * @return 0 in case of success, negative error code otherwise
+ */
+int32_t ad5592r_reset_channel_modes(struct ad5592r_dev *dev)
+{
+	uint32_t i;
+
+	if (!dev)
+		return FAILURE;
+
+	for (i = 0; i < sizeof(dev->channel_modes); i++)
+		dev->channel_modes[i] = CH_MODE_UNUSED;
+
+	return ad5592r_set_channel_modes(dev);
+}