import RT-Thread@9217865c without bsp, libcpu and components/net

components/drivers/usb/usbhost/core/driver.c

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-03-12     Yi Qiu      first version
+ * 2021-02-23     Leslie Lee  provide possibility for multi usb host
+ */
+
+#include <rtthread.h>
+#include <rtservice.h>
+#include <drivers/usb_host.h>
+
+static rt_list_t _driver_list;
+static rt_bool_t _driver_list_created = RT_FALSE;
+
+/**
+ * This function will initilize the usb class driver related data structure,
+ * and it should be invoked in the usb system initialization.
+ *
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usbh_class_driver_init(void)
+{
+    if (_driver_list_created == RT_FALSE)
+    {
+        rt_list_init(&_driver_list);
+        _driver_list_created = RT_TRUE;
+    }
+    return RT_EOK;
+}
+
+/**
+ * This function will register an usb class driver to the class driver manager.
+ *
+ * @param drv the pointer of the usb class driver.
+ *
+ * @return the error code, RT_EOK on successfully.
+ */
+
+rt_err_t rt_usbh_class_driver_register(ucd_t drv)
+{
+    if (drv == RT_NULL) return -RT_ERROR;
+
+    if (rt_usbh_class_driver_find(drv->class_code, drv->subclass_code) == RT_NULL)
+    {
+        /* insert class driver into driver list */
+        rt_list_insert_after(&_driver_list, &(drv->list));
+    }
+
+    return RT_EOK;
+}
+
+/**
+ * This function will removes a previously registed usb class driver.
+ *
+ * @param drv the pointer of the usb class driver structure.
+ *
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usbh_class_driver_unregister(ucd_t drv)
+{
+    RT_ASSERT(drv != RT_NULL);
+
+    /* remove class driver from driver list */
+    rt_list_remove(&(drv->list));
+
+    return RT_EOK;
+}
+
+/**
+ * This function will run an usb class driver.
+ *
+ * @param drv the pointer of usb class driver.
+ * @param args the parameter of run function.
+ *
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usbh_class_driver_enable(ucd_t drv, void* args)
+{
+    RT_ASSERT(drv != RT_NULL);
+
+    if(drv->enable != RT_NULL)
+        drv->enable(args);
+
+    return RT_EOK;
+}
+
+/**
+ * This function will stop a usb class driver.
+ *
+ * @param drv the pointer of usb class driver structure.
+ * @param args the argument of the stop function.
+ *
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usbh_class_driver_disable(ucd_t drv, void* args)
+{
+    RT_ASSERT(drv != RT_NULL);
+
+    if(drv->disable != RT_NULL)
+        drv->disable(args);
+
+    return RT_EOK;
+}
+
+
+/**
+ * This function finds a usb class driver by specified class code and subclass code.
+ *
+ * @param class_code the usb class driver's class code.
+ * @param subclass_code the usb class driver's sub class code.
+ *
+ * @return the registered usb class driver on successful, or RT_NULL on failure.
+ */
+ucd_t rt_usbh_class_driver_find(int class_code, int subclass_code)
+{
+    struct rt_list_node *node;
+
+    /* enter critical */
+    if (rt_thread_self() != RT_NULL)
+        rt_enter_critical();
+
+    /* try to find driver object */
+    for (node = _driver_list.next; node != &_driver_list; node = node->next)
+    {
+        ucd_t drv =
+            (ucd_t)rt_list_entry(node, struct uclass_driver, list);
+        if (drv->class_code == class_code)
+        {
+            /* leave critical */
+            if (rt_thread_self() != RT_NULL)
+                rt_exit_critical();
+
+            return drv;
+        }
+    }
+
+    /* leave critical */
+    if (rt_thread_self() != RT_NULL)
+        rt_exit_critical();
+
+    /* not found */
+    return RT_NULL;
+}