v1.1.1

bsp/artinchip/drv/i2c/drv_soft_i2c.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2024, ArtInChip Technology Co., Ltd
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Authors: hjh <jiehua.huang@artinchip.com>
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <aic_core.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <drivers/i2c-bit-ops.h>
+#include "aic_hal_clk.h"
+#include "aic_common.h"
+#include "aic_log.h"
+
+#define AIC_SOFT_I2C_TIMEOUT            1000
+
+struct aic_soft_i2c_pin {
+    u32 sda_pin;
+    u32 scl_pin;
+};
+
+struct aic_soft_i2c_bus {
+    struct rt_i2c_bus_device bus;
+    struct aic_soft_i2c_pin aic_i2c_pin;
+};
+
+static struct aic_soft_i2c_bus g_aic_soft_i2c;
+
+static void aic_soft_i2c_set_sda(void *data, rt_int32_t state)
+{
+    rt_pin_mode(g_aic_soft_i2c.aic_i2c_pin.sda_pin, PIN_MODE_OUTPUT);
+    rt_pin_write(g_aic_soft_i2c.aic_i2c_pin.sda_pin, state);
+}
+
+static void aic_soft_i2c_set_scl(void *data, rt_int32_t state)
+{
+    rt_pin_mode(g_aic_soft_i2c.aic_i2c_pin.scl_pin, PIN_MODE_OUTPUT);
+    rt_pin_write(g_aic_soft_i2c.aic_i2c_pin.scl_pin, state);
+}
+
+static rt_int32_t aic_soft_i2c_get_sda(void *data)
+{
+    rt_int32_t ret;
+
+    rt_pin_mode(g_aic_soft_i2c.aic_i2c_pin.sda_pin, PIN_MODE_INPUT_PULLUP);
+    ret = rt_pin_read(g_aic_soft_i2c.aic_i2c_pin.sda_pin);
+
+    return ret;
+}
+
+static rt_int32_t aic_soft_i2c_get_scl(void *data)
+{
+    rt_int32_t ret;
+
+    rt_pin_mode(g_aic_soft_i2c.aic_i2c_pin.scl_pin, PIN_MODE_INPUT_PULLUP);
+    ret = rt_pin_read(g_aic_soft_i2c.aic_i2c_pin.scl_pin);
+
+    return ret;
+}
+
+static void aic_soft_i2c_udelay(rt_uint32_t us)
+{
+    aic_udelay(us);
+}
+
+struct rt_i2c_bit_ops aic_soft_i2c_ops = {
+    .data = NULL,
+    .set_sda = aic_soft_i2c_set_sda,
+    .set_scl = aic_soft_i2c_set_scl,
+    .get_sda = aic_soft_i2c_get_sda,
+    .get_scl = aic_soft_i2c_get_scl,
+    .udelay = aic_soft_i2c_udelay,
+#ifdef AIC_USING_SOFT_I2C
+    .delay_us = AIC_DEV_SOFT_I2C_DELAY_TIME,
+#endif
+    .timeout = AIC_SOFT_I2C_TIMEOUT,
+};
+
+static int aic_soft_i2c_register()
+{
+    int ret = RT_EOK;
+
+#ifdef AIC_USING_SOFT_I2C
+    g_aic_soft_i2c.aic_i2c_pin.sda_pin = rt_pin_get(AIC_SOFT_I2C_SDA_PIN);
+    g_aic_soft_i2c.aic_i2c_pin.scl_pin = rt_pin_get(AIC_SOFT_I2C_SCL_PIN);
+
+    g_aic_soft_i2c.bus.priv = &aic_soft_i2c_ops;
+
+    ret = rt_i2c_bit_add_bus(&g_aic_soft_i2c.bus, "soft_i2c");
+    if (ret) {
+        hal_log_err("register soft i2c fail\r\n");
+        return ret;
+    }
+#endif
+
+    return ret;
+}
+
+INIT_DEVICE_EXPORT(aic_soft_i2c_register);