Add ch32v20x usbfs hcd initial support.

1 files changed, 618 insertions, 0 deletions

diff --git a/src/portable/wch/hcd_ch32_usbfs.c b/src/portable/wch/hcd_ch32_usbfs.c
new file mode 100644
index 000000000..534edb22b
--- /dev/null
+++ b/src/portable/wch/hcd_ch32_usbfs.c
@@ -0,0 +1,618 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2024 Mitsumine Suzu (verylowfreq)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "tusb_option.h"
+
+#if CFG_TUH_ENABLED && defined(TUP_USBIP_WCH_USBFS) && CFG_TUH_WCH_USBIP_USBFS
+
+#include "host/hcd.h"
+#include "host/usbh.h"
+#include "host/usbh_pvt.h"
+
+#include "bsp/board_api.h"
+
+#include "ch32v20x.h"
+#include "ch32v20x_usb.h"
+
+
+#define USBFS_RX_BUF_LEN 64
+#define USBFS_TX_BUF_LEN 64
+__attribute__((aligned(4))) static uint8_t USBFS_RX_Buf[USBFS_RX_BUF_LEN];
+__attribute__((aligned(4))) static uint8_t USBFS_TX_Buf[USBFS_TX_BUF_LEN];
+
+#define USB_XFER_TIMEOUT_MILLIS 500
+
+#define PANIC(...) do { printf("\r\nPANIC: " __VA_ARGS__); while (true) { } } while (false)
+
+#define LOG_CH32_USBFSH(...) TU_LOG3(__VA_ARGS__)
+
+// Busywait for delay microseconds/nanoseconds
+// static void loopdelay(uint32_t count)
+// {
+//     volatile uint32_t c = count / 3;
+//     // while (c-- != 0);
+//     asm volatile(
+//       "1:                     \n" // loop label
+//       "    addi  %0, %0, -1   \n" // c--
+//       "    bne   %0, zero, 1b \n" // if (c != 0) goto loop
+//       : "+r"(c)            // c is input/output operand
+//   );
+// }
+
+
+// Endpoint status
+typedef struct usb_edpt
+{
+    // Is this a valid struct
+    bool configured;
+
+    uint8_t dev_addr;
+    uint8_t ep_addr;
+    uint16_t max_packet_size;
+
+    // Data toggle (0 or not 0) for DATA0/1
+    uint8_t data_toggle;
+
+    // Xfer started time in millis for timeout
+    uint32_t current_xfer_packet_start_millis;
+    uint8_t* current_xfer_buffer;
+    uint16_t current_xfer_bufferlen;
+    uint16_t current_xfer_xferred_len;
+
+} usb_edpt_t;
+
+
+static usb_edpt_t usb_edpt_list[8] = { };
+
+
+static usb_edpt_t* get_edpt_record(uint8_t dev_addr, uint8_t ep_addr)
+{
+    for (size_t i = 0; i < TU_ARRAY_SIZE(usb_edpt_list); i++)
+    {
+        usb_edpt_t* cur = &usb_edpt_list[i];
+        if (cur->configured && cur->dev_addr == dev_addr && cur->ep_addr == ep_addr)
+        {
+            return cur;
+        }
+    }
+    return NULL;
+}
+
+static usb_edpt_t* get_empty_record_slot(void)
+{
+    for (size_t i = 0; i < TU_ARRAY_SIZE(usb_edpt_list); i++)
+    {
+        if (!usb_edpt_list[i].configured)
+        {
+            return &usb_edpt_list[i];
+        }
+    }
+    return NULL;
+}
+
+static usb_edpt_t* add_edpt_record(uint8_t dev_addr, uint8_t ep_addr, uint16_t max_packet_size)
+{
+    usb_edpt_t* slot = get_empty_record_slot();
+    TU_ASSERT(slot != NULL, NULL);
+
+    slot->dev_addr = dev_addr;
+    slot->ep_addr = ep_addr;
+    slot->max_packet_size = max_packet_size;
+    slot->data_toggle = 0;
+    slot->current_xfer_packet_start_millis = 0;
+    slot->current_xfer_buffer = NULL;
+    slot->current_xfer_bufferlen = 0;
+    slot->current_xfer_xferred_len = 0;
+
+    slot->configured = true;
+
+    return slot;
+}
+
+static usb_edpt_t* get_or_add_edpt_record(uint8_t dev_addr, uint8_t ep_addr, uint16_t max_packet_size)
+{
+    usb_edpt_t* ret = get_edpt_record(dev_addr, ep_addr);
+    if (ret != NULL)
+    {
+        return ret;
+    }
+    else
+    {
+        return add_edpt_record(dev_addr, ep_addr, max_packet_size);
+    }
+}
+
+
+static void remove_edpt_record_for_device(uint8_t dev_addr)
+{
+    for (size_t i = 0; i < TU_ARRAY_SIZE(usb_edpt_list); i++)
+    {
+        if (usb_edpt_list[i].configured && usb_edpt_list[i].dev_addr == dev_addr)
+        {
+            usb_edpt_list[i].configured = false;
+        }
+    }
+}
+
+
+/** Enable or disable USBFS Host function */
+static void hardware_init_host(bool enabled)
+{
+    // Reset USBOTG module
+    USBOTG_H_FS->BASE_CTRL = USBFS_UC_RESET_SIE | USBFS_UC_CLR_ALL;
+
+    osal_task_delay(1);
+    USBOTG_H_FS->BASE_CTRL = 0;
+
+    if (!enabled)
+    {
+        // Disable all feature
+        USBOTG_H_FS->BASE_CTRL = 0;
+    }
+    else
+    {
+        // Enable USB Host features
+        NVIC_DisableIRQ(USBFS_IRQn);
+        USBOTG_H_FS->BASE_CTRL = USBFS_UC_HOST_MODE | USBFS_UC_INT_BUSY | USBFS_UC_DMA_EN;
+        USBOTG_H_FS->HOST_EP_MOD = USBFS_UH_EP_TX_EN | USBFS_UH_EP_RX_EN;
+        USBOTG_H_FS->HOST_RX_DMA = (uint32_t)USBFS_RX_Buf;
+        USBOTG_H_FS->HOST_TX_DMA = (uint32_t)USBFS_TX_Buf;
+        USBOTG_H_FS->INT_EN = USBFS_UIE_TRANSFER | USBFS_UIE_DETECT;
+    }
+}
+
+static bool hardware_start_xfer(uint8_t pid, uint8_t ep_addr, uint8_t data_toggle)
+{
+    LOG_CH32_USBFSH("hardware_start_xfer(pid=%s(0x%02x), ep_addr=0x%02x, toggle=%d)\r\n", 
+        pid == USB_PID_IN ? "IN" : pid == USB_PID_OUT ? "OUT" : pid == USB_PID_SETUP ? "SETUP" : "(other)",
+        pid, ep_addr, data_toggle);
+
+    if (pid == USB_PID_IN)
+    { // FIXME: long delay needed (at release build) about 30msec
+        // loopdelay(SystemCoreClock / 1000 * 30);
+    }
+
+    uint8_t pid_edpt = (pid << 4) | (tu_edpt_number(ep_addr) & 0x0f);
+    USBOTG_H_FS->HOST_TX_CTRL = (data_toggle != 0) ? USBFS_UH_T_TOG : 0;
+    USBOTG_H_FS->HOST_RX_CTRL = (data_toggle != 0) ? USBFS_UH_R_TOG : 0;
+    USBOTG_H_FS->HOST_EP_PID = pid_edpt;
+    USBOTG_H_FS->INT_FG = USBFS_UIF_TRANSFER;
+    return true;
+}
+
+
+/** Set device address to communicate */
+static void update_device_address(uint8_t dev_addr)
+{
+    // Keep the bit of GP_BIT. Other 7bits are actual device address.
+    USBOTG_H_FS->DEV_ADDR = (USBOTG_H_FS->DEV_ADDR & USBFS_UDA_GP_BIT) | (dev_addr & USBFS_USB_ADDR_MASK);
+}
+
+/** Set port speed */
+static void update_port_speed(tusb_speed_t speed)
+{
+    LOG_CH32_USBFSH("update_port_speed(%s)\r\n", speed == TUSB_SPEED_FULL ? "Full" : speed == TUSB_SPEED_LOW ? "Low" : "(invalid)");
+    switch (speed) {
+    case TUSB_SPEED_LOW:
+        USBOTG_H_FS->BASE_CTRL |= USBFS_UC_LOW_SPEED;
+        USBOTG_H_FS->HOST_CTRL |= USBFS_UH_LOW_SPEED;
+        USBOTG_H_FS->HOST_SETUP |= USBFS_UH_PRE_PID_EN;
+        return;
+    case TUSB_SPEED_FULL:
+        USBOTG_H_FS->BASE_CTRL &= ~USBFS_UC_LOW_SPEED;
+        USBOTG_H_FS->HOST_CTRL &= ~USBFS_UH_LOW_SPEED;
+        USBOTG_H_FS->HOST_SETUP &= ~USBFS_UH_PRE_PID_EN;
+        return;
+    default:
+        PANIC("update_port_speed(%d)\r\n", speed);
+    }
+}
+
+static bool hardware_device_attached(void)
+{
+    return USBOTG_H_FS->MIS_ST & USBFS_UMS_DEV_ATTACH;
+}
+
+
+//--------------------------------------------------------------------+
+// HCD API
+//--------------------------------------------------------------------+
+bool hcd_init(uint8_t rhport)
+{
+    (void)rhport;
+    hardware_init_host(true);
+
+    return true;
+}
+
+bool hcd_deinit(uint8_t rhport)
+{
+    (void)rhport;
+    hardware_init_host(false);
+
+    return true;
+}
+
+void hcd_port_reset(uint8_t rhport)
+{
+    (void)rhport;
+    LOG_CH32_USBFSH("hcd_port_reset()\r\n");
+    NVIC_DisableIRQ(USBFS_IRQn);
+    update_device_address( 0x00 );
+
+    USBOTG_H_FS->HOST_CTRL |= USBFS_UH_BUS_RESET;
+    osal_task_delay(15);
+    USBOTG_H_FS->HOST_CTRL &= ~USBFS_UH_BUS_RESET;
+    osal_task_delay(2);
+
+    if ((USBOTG_H_FS->HOST_CTRL & USBFS_UH_PORT_EN) == 0)
+    {
+        if (hcd_port_speed_get(0) == TUSB_SPEED_LOW)
+        {
+            update_port_speed(TUSB_SPEED_LOW);
+        }
+    }
+
+    USBOTG_H_FS->HOST_CTRL |= USBFS_UH_PORT_EN;
+    USBOTG_H_FS->HOST_SETUP |= USBFS_UH_SOF_EN;
+
+    return;
+}
+
+void hcd_port_reset_end(uint8_t rhport)
+{
+    (void)rhport;
+    LOG_CH32_USBFSH("hcd_port_reset_end()\r\n");
+    // Suppress the attached event
+    USBOTG_H_FS->INT_FG |= USBFS_UIF_DETECT;
+    NVIC_EnableIRQ(USBFS_IRQn);
+
+    return;
+}
+
+bool hcd_port_connect_status(uint8_t rhport)
+{
+    (void)rhport;
+
+    return hardware_device_attached();
+}
+
+tusb_speed_t hcd_port_speed_get(uint8_t rhport)
+{
+    (void)rhport;
+    if (USBOTG_H_FS->MIS_ST & USBFS_UMS_DM_LEVEL)
+    {
+        return TUSB_SPEED_LOW;
+    }
+    else
+    {
+        return TUSB_SPEED_FULL;
+    }
+}
+
+// Close all opened endpoint belong to this device
+void hcd_device_close(uint8_t rhport, uint8_t dev_addr)
+{
+    (void)rhport;
+    LOG_CH32_USBFSH("hcd_device_close(%d, 0x%02x)\r\n", rhport, dev_addr);
+    remove_edpt_record_for_device(dev_addr);
+
+    return;
+}
+
+uint32_t hcd_frame_number(uint8_t rhport)
+{
+    (void)rhport;
+
+    return board_millis();
+}
+
+void hcd_int_enable(uint8_t rhport)
+{
+    (void)rhport;
+    NVIC_EnableIRQ(USBFS_IRQn);
+
+    return;
+}
+
+void hcd_int_disable(uint8_t rhport)
+{
+    (void)rhport;
+    NVIC_DisableIRQ(USBFS_IRQn);
+    
+    return;
+}
+
+void hcd_int_handler(uint8_t rhport, bool in_isr)
+{
+    (void)rhport;
+    (void)in_isr;
+
+    if (USBOTG_H_FS->INT_FG & USBFS_UIF_DETECT)
+    {
+        // Clear the flag
+        USBOTG_H_FS->INT_FG = USBFS_UIF_DETECT;
+        // Read the detection state
+        bool attached = hardware_device_attached();
+        LOG_CH32_USBFSH("hcd_int_handler() attached = %d\r\n", attached  ? 1 : 0);
+        if (attached)
+        {
+            hcd_event_device_attach(rhport, true);
+        }
+        else
+        {
+            hcd_event_device_remove(rhport, true);
+        }
+        return;
+    }
+
+    if (USBOTG_H_FS->INT_FG & USBFS_UIF_TRANSFER)
+    {
+        // Copy PID and Endpoint
+        uint8_t pid_edpt = USBOTG_H_FS->HOST_EP_PID;
+        uint8_t status = USBOTG_H_FS->INT_ST;
+        // Clear register to stop transfer
+        USBOTG_H_FS->HOST_EP_PID = 0;
+        // Clear the flag
+        USBOTG_H_FS->INT_FG = USBFS_UIF_TRANSFER;
+
+        LOG_CH32_USBFSH("hcd_int_handler() pid_edpt=0x%02x\r\n", pid_edpt);
+
+        uint8_t request_pid = pid_edpt >> 4;
+        uint8_t response_pid = USBOTG_H_FS->INT_ST & USBFS_UIS_H_RES_MASK;
+        uint8_t dev_addr = USBOTG_H_FS->DEV_ADDR;
+        uint8_t ep_addr = pid_edpt & 0x0f;
+        if (request_pid == USB_PID_IN)
+        {
+            ep_addr |= 0x80;
+        }
+
+        usb_edpt_t* edpt_info = get_edpt_record(dev_addr, ep_addr);
+        if (edpt_info == NULL)
+        {
+            PANIC("\r\nget_edpt_record() returned NULL in USBHD_IRQHandler\r\n");
+        }
+
+        if (status & USBFS_UIS_TOG_OK)
+        {
+            edpt_info->data_toggle ^= 0x01;
+
+            switch (request_pid)
+            {
+                case USB_PID_SETUP:
+                case USB_PID_OUT:
+                    {
+                        uint16_t xferred_len = edpt_info->current_xfer_bufferlen;
+                        hcd_event_xfer_complete(dev_addr, ep_addr, xferred_len, XFER_RESULT_SUCCESS, true);
+                        return;
+                    }
+                case USB_PID_IN:
+                    {
+                        uint16_t received_len = USBOTG_H_FS->RX_LEN;
+                        edpt_info->current_xfer_xferred_len += received_len;
+                        uint16_t xferred_len = edpt_info->current_xfer_xferred_len;
+                        LOG_CH32_USBFSH("Read %d bytes\r\n", received_len);
+                        // if (received_len > 0 && (edpt_info->current_xfer_buffer == NULL || edpt_info->current_xfer_bufferlen == 0)) {
+                        //     PANIC("Data received but buffer not set\r\n");
+                        // }
+                        memcpy(edpt_info->current_xfer_buffer, USBFS_RX_Buf, received_len);
+                        edpt_info->current_xfer_buffer += received_len;
+                        if ((received_len < edpt_info->max_packet_size) || (xferred_len == edpt_info->current_xfer_bufferlen))
+                        {
+                            // USB device sent all data.
+                            LOG_CH32_USBFSH("USB_PID_IN completed\r\n");
+                            hcd_event_xfer_complete(dev_addr, ep_addr, xferred_len, XFER_RESULT_SUCCESS, true);
+                            return;
+                        }
+                        else
+                        {
+                            // USB device may send more data.
+                            LOG_CH32_USBFSH("Read more data\r\n");
+                            hardware_start_xfer(USB_PID_IN, ep_addr, edpt_info->data_toggle);
+                            return;
+                        }
+                    }
+                default:
+                    {
+                        PANIC("Unknown PID: 0x%02x\n", request_pid);
+                    }
+            }
+        }
+        else
+        {
+            if (response_pid == USB_PID_STALL)
+            {
+                LOG_CH32_USBFSH("Data toggle mismatched and STALL\r\n");
+                hcd_edpt_clear_stall(0, dev_addr, ep_addr);
+                edpt_info->data_toggle = 0;
+                hardware_start_xfer(request_pid, ep_addr, 0);
+                return;
+            }
+            else if (response_pid == USB_PID_NAK)
+            {
+                LOG_CH32_USBFSH("Data toggle mismatched and NAK\r\n");
+                uint32_t elapsed_time = board_millis() - edpt_info->current_xfer_packet_start_millis;
+                if (elapsed_time > USB_XFER_TIMEOUT_MILLIS)
+                {
+                    hcd_event_xfer_complete(dev_addr, ep_addr, 0, XFER_RESULT_FAILED, true);
+                }
+                else
+                {
+                    hardware_start_xfer(request_pid, ep_addr, edpt_info->data_toggle);
+                }
+                return;
+            }
+            else if (response_pid == USB_PID_DATA0 || response_pid == USB_PID_DATA1)
+            {
+                LOG_CH32_USBFSH("Data toggle mismatched and DATA0/1 (not STALL). RX_LEN=%d\r\n", USBOTG_H_FS->RX_LEN);
+                hcd_event_xfer_complete(dev_addr, ep_addr, 0, XFER_RESULT_FAILED, true);
+                return;
+            }
+            else
+            {
+                LOG_CH32_USBFSH("\r\nIn USBHD_IRQHandler, unexpected response PID: 0x%02x\r\n", response_pid);
+                hcd_event_xfer_complete(dev_addr, ep_addr, 0, XFER_RESULT_FAILED, true);
+                return;
+            }
+        }
+    }
+}
+
+//--------------------------------------------------------------------+
+// Endpoint API
+//--------------------------------------------------------------------+
+
+bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const * ep_desc)
+{
+    (void)rhport;
+    uint8_t ep_addr = ep_desc->bEndpointAddress;
+    uint8_t ep_num = tu_edpt_number(ep_addr);
+    uint16_t max_packet_size = ep_desc->wMaxPacketSize;
+    LOG_CH32_USBFSH("hcd_edpt_open(rhport=%d, dev_addr=0x%02x, %p) EndpointAdderss=0x%02x,maxPacketSize=%d\r\n", rhport, dev_addr, ep_desc, ep_addr, max_packet_size);
+
+    if (ep_num == 0x00)
+    {
+        TU_ASSERT(get_or_add_edpt_record(dev_addr, 0x00, max_packet_size) != NULL, false);
+        TU_ASSERT(get_or_add_edpt_record(dev_addr, 0x80, max_packet_size) != NULL, false);
+    }
+    else
+    {
+        TU_ASSERT(get_or_add_edpt_record(dev_addr, ep_addr, max_packet_size) != NULL, false);
+    }
+
+    update_device_address(dev_addr);
+
+    if (dev_addr == 0x00 && ep_num == 0x00)
+    {
+        // It assumes first open for the device, so make the port enable
+        tusb_speed_t device_speed = hcd_port_speed_get(rhport);
+        update_port_speed(device_speed);
+        USBOTG_H_FS->HOST_CTRL |= USBFS_UH_PORT_EN;
+        USBOTG_H_FS->HOST_SETUP |= USBFS_UH_SOF_EN;
+    }
+
+    return true;
+}
+
+bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t * buffer, uint16_t buflen)
+{
+    (void)rhport;
+
+    usb_edpt_t* edpt_info = get_edpt_record(dev_addr, ep_addr);
+    if (edpt_info == NULL)
+    {
+        PANIC("get_edpt_record() returned NULL in hcd_edpt_xfer()\r\n");
+    }
+
+    edpt_info->current_xfer_buffer = buffer;
+    edpt_info->current_xfer_bufferlen = buflen;
+
+    edpt_info->current_xfer_packet_start_millis = board_millis();
+    edpt_info->current_xfer_xferred_len = 0;
+
+    if (tu_edpt_dir(ep_addr) == TUSB_DIR_IN)
+    {
+        LOG_CH32_USBFSH("hcd_edpt_xfer(): READ, ep_addr=0x%02x, len=%d\r\n", ep_addr, buflen);
+        return hardware_start_xfer(USB_PID_IN, ep_addr, edpt_info->data_toggle);
+    }
+    else
+    {
+        LOG_CH32_USBFSH("hcd_edpt_xfer(): WRITE, ep_addr=0x%02x, len=%d\r\n", ep_addr, buflen);
+        USBOTG_H_FS->HOST_TX_LEN = buflen;
+        memcpy(USBFS_TX_Buf, buffer, buflen);
+        return hardware_start_xfer(USB_PID_OUT, ep_addr, edpt_info->data_toggle);
+    }
+}
+
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr)
+{
+    (void) rhport;
+    (void) dev_addr;
+    (void) ep_addr;
+    LOG_CH32_USBFSH("hcd_edpt_abort_xfer(%d, 0x%02x, 0x%02x)\r\n", rhport, dev_addr, ep_addr);
+
+    return false;
+}
+
+bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet[8])
+{
+    (void)rhport;
+    LOG_CH32_USBFSH("hcd_setup_send(rhport=%d, dev_addr=0x%02x, %p)\r\n", rhport, dev_addr, setup_packet);
+
+
+    usb_edpt_t* edpt_info_tx = get_edpt_record(dev_addr, 0x00);
+    usb_edpt_t* edpt_info_rx = get_edpt_record(dev_addr, 0x80);
+    TU_ASSERT(edpt_info_tx != NULL, false);
+    TU_ASSERT(edpt_info_rx != NULL, false);
+
+    // Initialize data toggle (SETUP always starts with DATA0)
+    // Data toggle for OUT is toggled in hcd_int_handler()
+    edpt_info_tx->data_toggle = 0;
+    // Data toggle for IN must be set 0x01 manually.
+    edpt_info_rx->data_toggle = 0x01;
+    const uint16_t setup_packet_datalen = 8;
+    memcpy(USBFS_TX_Buf, setup_packet, setup_packet_datalen);
+    USBOTG_H_FS->HOST_TX_LEN = setup_packet_datalen;
+
+    edpt_info_tx->current_xfer_packet_start_millis = board_millis();
+    edpt_info_tx->current_xfer_buffer = USBFS_TX_Buf;
+    edpt_info_tx->current_xfer_bufferlen = setup_packet_datalen;
+    edpt_info_tx->current_xfer_xferred_len = 0;
+
+    hardware_start_xfer(USB_PID_SETUP, 0, 0);
+
+    return true;
+}
+
+bool hcd_edpt_clear_stall(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr)
+{
+    (void) rhport;
+    (void) dev_addr;
+    LOG_CH32_USBFSH("hcd_edpt_clear_stall(rhport=%d, dev_addr=0x%02x, ep_addr=0x%02x)\r\n", rhport, dev_addr, ep_addr);
+    // PANIC("\r\nstall\r\n");
+    uint8_t edpt_num = tu_edpt_number(ep_addr);
+    uint8_t setup_request_clear_stall[8] = {
+        0x02, 0x01, 0x00, 0x00, edpt_num, 0x00, 0x00, 0x00
+    };
+    memcpy(USBFS_TX_Buf, setup_request_clear_stall, 8);
+    USBOTG_H_FS->HOST_TX_LEN = 8;
+
+    hcd_int_disable(0);
+
+    USBOTG_H_FS->HOST_EP_PID = (USB_PID_SETUP << 4) | 0x00;
+    USBOTG_H_FS->INT_FG |= USBFS_UIF_TRANSFER;
+    while ((USBOTG_H_FS->INT_FG & USBFS_UIF_TRANSFER) == 0) { }
+    USBOTG_H_FS->HOST_EP_PID = 0;
+    uint8_t response_pid = USBOTG_H_FS->INT_ST & USBFS_UIS_H_RES_MASK;
+    (void)response_pid;
+    LOG_CH32_USBFSH("hcd_edpt_clear_stall() response pid=0x%02x\r\n", response_pid);
+
+    hcd_int_enable(0);
+
+    return true;
+}
+
+#endif