添加rtthread相关代码

riscv/rtthread/components/drivers/i2c/i2c_dev.c

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author        Notes
+ * 2012-04-25     weety         first version
+ * 2014-08-03     bernard       fix some compiling warning
+ * 2021-04-20     RiceChen      added support for bus clock control
+ */
+
+#include <rtdevice.h>
+
+#define DBG_TAG               "I2C"
+#ifdef RT_I2C_DEBUG
+#define DBG_LVL               DBG_LOG
+#else
+#define DBG_LVL               DBG_INFO
+#endif
+#include <rtdbg.h>
+
+static rt_ssize_t i2c_bus_device_read(rt_device_t dev,
+                                     rt_off_t    pos,
+                                     void       *buffer,
+                                     rt_size_t   count)
+{
+    rt_uint16_t addr;
+    rt_uint16_t flags;
+    struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+    RT_ASSERT(bus != RT_NULL);
+    RT_ASSERT(buffer != RT_NULL);
+
+    LOG_D("I2C bus dev [%s] reading %u bytes.", dev->parent.name, count);
+
+    addr = pos & 0xffff;
+    flags = (pos >> 16) & 0xffff;
+
+    return rt_i2c_master_recv(bus, addr, flags, (rt_uint8_t *)buffer, count);
+}
+
+static rt_ssize_t i2c_bus_device_write(rt_device_t dev,
+                                      rt_off_t    pos,
+                                      const void *buffer,
+                                      rt_size_t   count)
+{
+    rt_uint16_t addr;
+    rt_uint16_t flags;
+    struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+    RT_ASSERT(bus != RT_NULL);
+    RT_ASSERT(buffer != RT_NULL);
+
+    LOG_D("I2C bus dev [%s] writing %u bytes.", dev->parent.name, count);
+
+    addr = pos & 0xffff;
+    flags = (pos >> 16) & 0xffff;
+
+    return rt_i2c_master_send(bus, addr, flags, (const rt_uint8_t *)buffer, count);
+}
+
+static rt_err_t i2c_bus_device_control(rt_device_t dev,
+                                       int         cmd,
+                                       void       *args)
+{
+    rt_err_t ret;
+    struct rt_i2c_priv_data *priv_data;
+    struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+    RT_ASSERT(bus != RT_NULL);
+
+    switch (cmd)
+    {
+    /* set 10-bit addr mode */
+    case RT_I2C_DEV_CTRL_10BIT:
+        bus->flags |= RT_I2C_ADDR_10BIT;
+        break;
+    case RT_I2C_DEV_CTRL_TIMEOUT:
+        bus->timeout = *(rt_uint32_t *)args;
+        break;
+    case RT_I2C_DEV_CTRL_RW:
+        priv_data = (struct rt_i2c_priv_data *)args;
+        ret = rt_i2c_transfer(bus, priv_data->msgs, priv_data->number);
+        if (ret < 0)
+        {
+            return -RT_EIO;
+        }
+        break;
+    default:
+        return rt_i2c_control(bus, cmd, args);
+    }
+
+    return RT_EOK;
+}
+
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops i2c_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    i2c_bus_device_read,
+    i2c_bus_device_write,
+    i2c_bus_device_control
+};
+#endif
+
+rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device *bus,
+                                       const char               *name)
+{
+    struct rt_device *device;
+    RT_ASSERT(bus != RT_NULL);
+
+    device = &bus->parent;
+
+    device->user_data = bus;
+
+    /* set device type */
+    device->type    = RT_Device_Class_I2CBUS;
+    /* initialize device interface */
+#ifdef RT_USING_DEVICE_OPS
+    device->ops     = &i2c_ops;
+#else
+    device->init    = RT_NULL;
+    device->open    = RT_NULL;
+    device->close   = RT_NULL;
+    device->read    = i2c_bus_device_read;
+    device->write   = i2c_bus_device_write;
+    device->control = i2c_bus_device_control;
+#endif
+
+    /* register to device manager */
+    rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
+
+    return RT_EOK;
+}