feat(class/aoa): add usb aoa host

Kconfig

@@ -295,6 +295,11 @@ if CHERRYUSB
             prompt "Enable usb pl2303 driver"
             default n
 
+        config CHERRYUSB_HOST_AOA
+            bool
+            prompt "Enable usb aoa driver"
+            default n
+
         config USBHOST_PLATFORM_CDC_ECM
             bool
 

README.md

@@ -103,6 +103,7 @@ CherryUSB Host Stack has the following functions：
 - Support USB Bluetooth class (support nimble and zephyr bluetooth stack, support **CLASS:0xE0** or vendor class like cdc acm)
 - Support Vendor class (serial, net, wifi)
 - Support USB modeswitch
+- Support Android Open Accessory
 - Support multi host with the same USB IP
 
 The CherryUSB Host stack also provides the lsusb function, which allows you to view information about all mounted devices, including those on external hubs, with the help of a shell plugin.

README_zh.md

@@ -103,6 +103,7 @@ CherryUSB Host 协议栈当前实现以下功能：
 - 支持 USB Bluetooth (支持 nimble and zephyr bluetooth 协议栈，支持 **CLASS: 0xE0** 或者厂家自定义类，类似于 cdc acm 功能)
 - 支持 Vendor 类 class (serial, net, wifi)
 - 支持 USB modeswitch
+- 支持 Android Open Accessory
 - 支持相同 USB IP 的多主机
 
 同时，CherryUSB Host 协议栈还提供了 lsusb 的功能，借助 shell 插件可以查看所有挂载设备的信息，包括外部 hub 上的设备的信息。

cherryusb.cmake

@@ -40,6 +40,7 @@ ${CMAKE_CURRENT_LIST_DIR}/class/adb
 ${CMAKE_CURRENT_LIST_DIR}/class/vendor/net
 ${CMAKE_CURRENT_LIST_DIR}/class/vendor/serial
 ${CMAKE_CURRENT_LIST_DIR}/class/vendor/wifi
+${CMAKE_CURRENT_LIST_DIR}/class/aoa
 )
 
 if(CONFIG_CHERRYUSB_DEVICE)
@@ -218,6 +219,9 @@ if(CONFIG_CHERRYUSB_HOST)
     if(CONFIG_CHERRYUSB_HOST_BL616)
     list(APPEND cherryusb_srcs ${CMAKE_CURRENT_LIST_DIR}/class/vendor/wifi/usbh_bl616.c)
     endif()
+    if(CONFIG_CHERRYUSB_HOST_AOA)
+    list(APPEND cherryusb_srcs ${CMAKE_CURRENT_LIST_DIR}/class/aoa/usbh_aoa.c)
+    endif()
 
     if(DEFINED CONFIG_CHERRYUSB_HOST_HCD)
         if("${CONFIG_CHERRYUSB_HOST_HCD}" STREQUAL "ehci_bouffalo")

class/aoa/usb_aoa.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2024, sakumisu
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef USB_AOA_H
+#define USB_AOA_H
+
+//AOA 1.0
+#define AOA_ACCESSORY_VENDOR_ID      0x18D1
+#define AOA_ACCESSORY_PRODUCT_ID     0x2D00
+#define AOA_ACCESSORY_ADB_PRODUCT_ID 0x2D01
+
+//AOA 2.0
+#define AOA_AUDIO_PRODUCT_ID               0x2D02
+#define AOA_AUDIO_ADB_PRODUCT_ID           0x2D03
+#define AOA_ACCESSORY_AUDIO_PRODUCT_ID     0x2D04
+#define AOA_ACCESSORY_AUDIO_ADB_PRODUCT_ID 0x2D05
+
+//AOA 1.0
+#define AOA_ACCESSORY_GET_PROTOCOL 51
+#define AOA_ACCESSORY_SEND_STRING  52
+#define AOA_ACCESSORY_START        53
+
+//AOA 2.0
+#define AOA_ACCESSORY_REGISTER_HID        54
+#define AOA_ACCESSORY_UNREGISTER_HID      55
+#define AOA_ACCESSORY_SET_HID_REPORT_DESC 56
+#define AOA_ACCESSORY_SEND_HID_EVENT      57
+#define AOA_ACCESSORY_SET_AUDIO_MODE      58
+
+#define AOA_ACCESSORY_STRING_MANUFACTURER 0
+#define AOA_ACCESSORY_STRING_MODEL        1
+#define AOA_ACCESSORY_STRING_DESCRIPTION  2
+#define AOA_ACCESSORY_STRING_VERSION      3
+#define AOA_ACCESSORY_STRING_URI          4
+#define AOA_ACCESSORY_STRING_SERIAL       5
+
+struct aoa_string_info {
+    char acc_manufacturer[64];
+    char acc_model[64];
+    char acc_description[64];
+    char acc_version[64];
+    char acc_uri[64];
+    char acc_serial[64];
+};
+
+#endif /* USB_AOA_H */

class/aoa/usbh_aoa.c

@@ -0,0 +1,289 @@
+/*
+ * Copyright (c) 2024, sakumisu
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "usbh_core.h"
+#include "usbh_aoa.h"
+
+#undef USB_DBG_TAG
+#define USB_DBG_TAG "usbh_aoa"
+#include "usb_log.h"
+
+#define DEV_FORMAT "/dev/aoa"
+
+USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_aoa_buffer[128];
+
+static struct usbh_aoa g_aoa_class;
+
+int usbh_aoa_switch(struct usbh_hubport *hport, struct aoa_string_info *info)
+{
+    struct usb_setup_packet *setup;
+    int ret;
+
+    setup = hport->setup;
+
+    if (setup == NULL) {
+        return -USB_ERR_INVAL;
+    }
+
+    USB_LOG_INFO("Try switch into aoa mode\r\n");
+
+    setup->bmRequestType = USB_REQUEST_DIR_IN | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_GET_PROTOCOL;
+    setup->wValue = 0;
+    setup->wIndex = 0;
+    setup->wLength = 2;
+
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    USB_LOG_INFO("AOA version: v%d.%d\r\n", g_aoa_buffer[0], g_aoa_buffer[1]);
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_MANUFACTURER;
+    setup->wLength = strlen(info->acc_manufacturer) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_manufacturer, strlen(info->acc_manufacturer));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_MODEL;
+    setup->wLength = strlen(info->acc_model) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_model, strlen(info->acc_model));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_DESCRIPTION;
+    setup->wLength = strlen(info->acc_description) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_description, strlen(info->acc_description));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_VERSION;
+    setup->wLength = strlen(info->acc_version) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_version, strlen(info->acc_version));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_URI;
+    setup->wLength = strlen(info->acc_uri) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_uri, strlen(info->acc_uri));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_STRING;
+    setup->wValue = 0;
+    setup->wIndex = AOA_ACCESSORY_STRING_SERIAL;
+    setup->wLength = strlen(info->acc_serial) + 1;
+
+    memcpy(g_aoa_buffer, info->acc_serial, strlen(info->acc_serial));
+    ret = usbh_control_transfer(hport, setup, g_aoa_buffer);
+    if (ret < 0) {
+        return ret;
+    }
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_START;
+    setup->wValue = 0;
+    setup->wIndex = 0;
+    setup->wLength = 0;
+
+    ret = usbh_control_transfer(hport, setup, NULL);
+    if (ret < 0) {
+        return ret;
+    }
+
+    USB_LOG_INFO("Switch into aoa mode success, wait usb device restart...\r\n");
+    return 0;
+}
+
+int usbh_aoa_register_hid(struct usbh_aoa *aoa_class, uint16_t id, uint8_t *report, uint32_t report_len)
+{
+    struct usb_setup_packet *setup;
+    int ret;
+    uint8_t len;
+    uint32_t offset;
+
+    if (!aoa_class || !aoa_class->hport) {
+        return -USB_ERR_INVAL;
+    }
+    setup = aoa_class->hport->setup;
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_REGISTER_HID;
+    setup->wValue = id;
+    setup->wIndex = report_len;
+    setup->wLength = 0;
+
+    ret = usbh_control_transfer(aoa_class->hport, setup, NULL);
+    if (ret < 0) {
+        return ret;
+    }
+
+    offset = 0;
+    while (report_len > 0) {
+        len = report_len > 64 ? 64 : report_len;
+
+        setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+        setup->bRequest = AOA_ACCESSORY_SET_HID_REPORT_DESC;
+        setup->wValue = id;
+        setup->wIndex = offset;
+        setup->wLength = len;
+
+        memcpy(g_aoa_buffer, report + offset, len);
+        ret = usbh_control_transfer(aoa_class->hport, setup, g_aoa_buffer);
+        if (ret < 0) {
+            return ret;
+        }
+        offset += len;
+        report_len -= len;
+    }
+    return ret;
+}
+
+int usbh_aoa_send_hid_event(struct usbh_aoa *aoa_class, uint16_t id, uint8_t *event, uint32_t event_len)
+{
+    struct usb_setup_packet *setup;
+    int ret;
+    uint8_t len;
+    uint32_t offset;
+
+    if (!aoa_class || !aoa_class->hport) {
+        return -USB_ERR_INVAL;
+    }
+    setup = aoa_class->hport->setup;
+
+    setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
+    setup->bRequest = AOA_ACCESSORY_SEND_HID_EVENT;
+    setup->wValue = id;
+    setup->wIndex = 0;
+    setup->wLength = event_len;
+
+    memcpy(g_aoa_buffer, event, event_len);
+    return usbh_control_transfer(aoa_class->hport, setup, event);
+}
+
+static int usbh_aoa_connect(struct usbh_hubport *hport, uint8_t intf)
+{
+    struct usb_endpoint_descriptor *ep_desc;
+    int ret = 0;
+
+    struct usbh_aoa *aoa_class = &g_aoa_class;
+
+    memset(aoa_class, 0, sizeof(struct usbh_aoa));
+
+    aoa_class->hport = hport;
+    aoa_class->intf = intf;
+
+    hport->config.intf[intf].priv = aoa_class;
+
+    for (uint8_t i = 0; i < hport->config.intf[intf].altsetting[0].intf_desc.bNumEndpoints; i++) {
+        ep_desc = &hport->config.intf[intf].altsetting[0].ep[i].ep_desc;
+
+        if (ep_desc->bEndpointAddress & 0x80) {
+            USBH_EP_INIT(aoa_class->bulkin, ep_desc);
+        } else {
+            USBH_EP_INIT(aoa_class->bulkout, ep_desc);
+        }
+    }
+
+    strncpy(hport->config.intf[intf].devname, DEV_FORMAT, CONFIG_USBHOST_DEV_NAMELEN);
+
+    USB_LOG_INFO("Register AOA Class:%s\r\n", hport->config.intf[intf].devname);
+
+    usbh_aoa_run(aoa_class);
+    return 0;
+}
+
+static int usbh_aoa_disconnect(struct usbh_hubport *hport, uint8_t intf)
+{
+    int ret = 0;
+
+    struct usbh_aoa *aoa_class = (struct usbh_aoa *)hport->config.intf[intf].priv;
+
+    if (aoa_class) {
+        if (aoa_class->bulkin) {
+            usbh_kill_urb(&aoa_class->bulkin_urb);
+        }
+
+        if (aoa_class->bulkout) {
+            usbh_kill_urb(&aoa_class->bulkout_urb);
+        }
+
+        if (hport->config.intf[intf].devname[0] != '\0') {
+            USB_LOG_INFO("Unregister AOA Class:%s\r\n", hport->config.intf[intf].devname);
+            usbh_aoa_stop(aoa_class);
+        }
+
+        memset(aoa_class, 0, sizeof(struct usbh_aoa));
+    }
+
+    return ret;
+}
+
+__WEAK void usbh_aoa_run(struct usbh_aoa *aoa_class)
+{
+    (void)aoa_class;
+}
+
+__WEAK void usbh_aoa_stop(struct usbh_aoa *aoa_class)
+{
+    (void)aoa_class;
+}
+
+static const uint16_t aoa_id_table[][2] = {
+    { AOA_ACCESSORY_VENDOR_ID, AOA_ACCESSORY_PRODUCT_ID },
+    { AOA_ACCESSORY_VENDOR_ID, AOA_ACCESSORY_ADB_PRODUCT_ID },
+    { AOA_ACCESSORY_VENDOR_ID, AOA_AUDIO_PRODUCT_ID },
+    { AOA_ACCESSORY_VENDOR_ID, AOA_AUDIO_ADB_PRODUCT_ID },
+    { AOA_ACCESSORY_VENDOR_ID, AOA_ACCESSORY_AUDIO_PRODUCT_ID },
+    { AOA_ACCESSORY_VENDOR_ID, AOA_ACCESSORY_AUDIO_ADB_PRODUCT_ID },
+    { 0, 0 },
+};
+
+const struct usbh_class_driver aoa_class_driver = {
+    .driver_name = "aoa",
+    .connect = usbh_aoa_connect,
+    .disconnect = usbh_aoa_disconnect
+};
+
+CLASS_INFO_DEFINE const struct usbh_class_info aoa_intf_class_info = {
+    .match_flags = USB_CLASS_MATCH_VID_PID | USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS,
+    .bInterfaceClass = 0xff,
+    .bInterfaceSubClass = 0xff,
+    .bInterfaceProtocol = 0x00,
+    .id_table = aoa_id_table,
+    .class_driver = &aoa_class_driver
+};