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-rw-r--r--drivers/gpio/pca9505.c166
-rw-r--r--drivers/gpio/pca9505.h67
2 files changed, 233 insertions, 0 deletions
diff --git a/drivers/gpio/pca9505.c b/drivers/gpio/pca9505.c
new file mode 100644
index 0000000000..5803746c96
--- /dev/null
+++ b/drivers/gpio/pca9505.c
@@ -0,0 +1,166 @@
+// Copyright 2022 nirim000
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "i2c_master.h"
+#include "pca9505.h"
+
+#include "debug.h"
+
+#define SLAVE_TO_ADDR(n) (n << 1)
+#define TIMEOUT 100
+
+enum {
+ CMD_INPUT_0 = 0,
+ CMD_INPUT_1,
+ CMD_INPUT_2,
+ CMD_INPUT_3,
+ CMD_INPUT_4,
+ CMD_OUTPUT_0 = 8,
+ CMD_OUTPUT_1,
+ CMD_OUTPUT_2,
+ CMD_OUTPUT_3,
+ CMD_OUTPUT_4,
+ CMD_INVERSION_0 = 16,
+ CMD_INVERSION_1,
+ CMD_INVERSION_2,
+ CMD_INVERSION_3,
+ CMD_INVERSION_4,
+ CMD_CONFIG_0 = 24,
+ CMD_CONFIG_1,
+ CMD_CONFIG_2,
+ CMD_CONFIG_3,
+ CMD_CONFIG_4,
+};
+
+void pca9505_init(uint8_t slave_addr) {
+ static uint8_t s_init = 0;
+ if (!s_init) {
+ i2c_init();
+
+ s_init = 1;
+ }
+
+ // TODO: could check device connected
+ // i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
+ // i2c_stop();
+}
+
+bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+ uint8_t cmd = 0;
+ switch (port) {
+ case 0:
+ cmd = CMD_CONFIG_0;
+ break;
+ case 1:
+ cmd = CMD_CONFIG_1;
+ break;
+ case 2:
+ cmd = CMD_CONFIG_2;
+ break;
+ case 3:
+ cmd = CMD_CONFIG_3;
+ break;
+ case 4:
+ cmd = CMD_CONFIG_4;
+ break;
+ }
+
+ i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ print("pca9505_set_config::FAILED\n");
+ return false;
+ }
+
+ return true;
+}
+
+bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+ uint8_t cmd = 0;
+ switch (port) {
+ case 0:
+ cmd = CMD_INVERSION_0;
+ break;
+ case 1:
+ cmd = CMD_INVERSION_1;
+ break;
+ case 2:
+ cmd = CMD_INVERSION_2;
+ break;
+ case 3:
+ cmd = CMD_INVERSION_3;
+ break;
+ case 4:
+ cmd = CMD_INVERSION_4;
+ break;
+ }
+
+ i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ print("pca9505_set_polarity::FAILED\n");
+ return false;
+ }
+
+ return true;
+}
+
+bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+ uint8_t cmd = 0;
+ switch (port) {
+ case 0:
+ cmd = CMD_OUTPUT_0;
+ break;
+ case 1:
+ cmd = CMD_OUTPUT_1;
+ break;
+ case 2:
+ cmd = CMD_OUTPUT_2;
+ break;
+ case 3:
+ cmd = CMD_OUTPUT_3;
+ break;
+ case 4:
+ cmd = CMD_OUTPUT_4;
+ break;
+ }
+
+ i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ print("pca9505_set_output::FAILED\n");
+ return false;
+ }
+
+ return true;
+}
+
+bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* out) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+ uint8_t cmd = 0;
+ switch (port) {
+ case 0:
+ cmd = CMD_INPUT_0;
+ break;
+ case 1:
+ cmd = CMD_INPUT_1;
+ break;
+ case 2:
+ cmd = CMD_INPUT_2;
+ break;
+ case 3:
+ cmd = CMD_INPUT_3;
+ break;
+ case 4:
+ cmd = CMD_INPUT_4;
+ break;
+ }
+
+ i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ print("pca9505_readPins::FAILED\n");
+ return false;
+ }
+
+ return true;
+}
diff --git a/drivers/gpio/pca9505.h b/drivers/gpio/pca9505.h
new file mode 100644
index 0000000000..732ddb88ea
--- /dev/null
+++ b/drivers/gpio/pca9505.h
@@ -0,0 +1,67 @@
+// Copyright 2022 nirim000
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/**
+ * Port ID
+ */
+typedef enum {
+ PCA9505_PORT0,
+ PCA9505_PORT1,
+ PCA9505_PORT2,
+ PCA9505_PORT3,
+ PCA9505_PORT4,
+} pca9505_port_t;
+
+/**
+ * Helpers for set_config
+ */
+enum {
+ ALL_NORMAL = 0,
+ ALL_INVERTED = 0xFF,
+};
+
+/**
+ * Helpers for set_config
+ */
+enum {
+ ALL_OUTPUT = 0,
+ ALL_INPUT = 0xFF,
+};
+
+/**
+ * Helpers for set_output
+ */
+enum {
+ ALL_LOW = 0,
+ ALL_HIGH = 0xFF,
+};
+
+/**
+ * Init expander and any other dependent drivers
+ */
+void pca9505_init(uint8_t slave_addr);
+
+/**
+ * Configure input/output to a given port
+ */
+bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
+
+/**
+ * Configure polarity to a given port
+ */
+bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
+
+/**
+ * Write high/low to a given port
+ */
+bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
+
+/**
+ * Read state of a given port
+ */
+bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* ret);