From 1158fc3d8c1a71ae89cb9dbd7504712114352af2 Mon Sep 17 00:00:00 2001
From: sakumisu <1203593632@qq.com>
Date: Sat, 6 Jan 2024 22:16:58 +0800
Subject: support multi USB IP for host

---
 docs/source/api/api_host.rst | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'docs/source/api')

diff --git a/docs/source/api/api_host.rst b/docs/source/api/api_host.rst
index c87166be..92274922 100644
--- a/docs/source/api/api_host.rst
+++ b/docs/source/api/api_host.rst
@@ -111,6 +111,19 @@ hub 结构体
         uint8_t *int_buffer;
     };
 
+usbh_alloc_bus
+""""""""""""""""""""""""""""""""""""
+
+``usbh_alloc_bus`` 用于创建一个 bus，并且根据 reg_base 分配一个 hcd
+
+.. code-block:: C
+
+    struct usbh_bus *usbh_alloc_bus(uint8_t busid, uint32_t reg_base);
+
+- **busid**  bus id，从 0开始，不能超过 `CONFIG_USBHOST_MAX_BUS`
+- **reg_base**  hcd 寄存器基地址
+- 返回 bus 句柄
+
 usbh_initialize
 """"""""""""""""""""""""""""""""""""
 
@@ -118,7 +131,9 @@ usbh_initialize
 
 .. code-block:: C
 
-    int usbh_initialize(void);
+    int usbh_initialize(struct usbh_bus *bus);
+
+- **bus**  bus 句柄
 
 usbh_find_class_instance
 """"""""""""""""""""""""""""""""""""
-- 
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