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|
/*
* Copyright (c) 2022, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usb_ch32_usbhs_reg.h"
#ifndef USB_NUM_BIDIR_ENDPOINTS
#define USB_NUM_BIDIR_ENDPOINTS 16
#endif
#define USB_SET_RX_DMA(ep_idx, addr) (*(volatile uint32_t *)((uint32_t)(&USBHS_DEVICE->UEP1_RX_DMA) + 4 * (ep_idx - 1)) = addr)
#define USB_SET_TX_DMA(ep_idx, addr) (*(volatile uint32_t *)((uint32_t)(&USBHS_DEVICE->UEP1_TX_DMA) + 4 * (ep_idx - 1)) = addr)
#define USB_SET_MAX_LEN(ep_idx, len) (*(volatile uint16_t *)((uint32_t)(&USBHS_DEVICE->UEP0_MAX_LEN) + 4 * ep_idx) = len)
#define USB_SET_TX_LEN(ep_idx, len) (*(volatile uint16_t *)((uint32_t)(&USBHS_DEVICE->UEP0_TX_LEN) + 4 * ep_idx) = len)
#define USB_GET_TX_LEN(ep_idx) (*(volatile uint16_t *)((uint32_t)(&USBHS_DEVICE->UEP0_TX_LEN) + 4 * ep_idx))
#define USB_SET_TX_CTRL(ep_idx, val) (*(volatile uint8_t *)((uint32_t)(&USBHS_DEVICE->UEP0_TX_CTRL) + 4 * ep_idx) = val)
#define USB_GET_TX_CTRL(ep_idx) (*(volatile uint8_t *)((uint32_t)(&USBHS_DEVICE->UEP0_TX_CTRL) + 4 * ep_idx))
#define USB_SET_RX_CTRL(ep_idx, val) (*(volatile uint8_t *)((uint32_t)(&USBHS_DEVICE->UEP0_RX_CTRL) + 4 * ep_idx) = val)
#define USB_GET_RX_CTRL(ep_idx) (*(volatile uint8_t *)((uint32_t)(&USBHS_DEVICE->UEP0_RX_CTRL) + 4 * ep_idx))
/* Endpoint state */
struct ch32_usbhs_ep_state {
uint16_t ep_mps; /* Endpoint max packet size */
uint8_t ep_type; /* Endpoint type */
uint8_t ep_stalled; /* Endpoint stall flag */
uint8_t ep_enable; /* Endpoint enable */
uint8_t *xfer_buf;
uint32_t xfer_len;
uint32_t actual_xfer_len;
};
/* Driver state */
struct ch32_usbhs_udc {
__attribute__((aligned(4))) struct usb_setup_packet setup;
volatile uint8_t dev_addr;
struct ch32_usbhs_ep_state in_ep[USB_NUM_BIDIR_ENDPOINTS]; /*!< IN endpoint parameters*/
struct ch32_usbhs_ep_state out_ep[USB_NUM_BIDIR_ENDPOINTS]; /*!< OUT endpoint parameters */
} g_ch32_usbhs_udc;
volatile uint8_t mps_over_flag = 0;
volatile bool ep0_rx_data_toggle;
volatile bool ep0_tx_data_toggle;
volatile bool epx_tx_data_toggle[USB_NUM_BIDIR_ENDPOINTS - 1];
__WEAK void usb_dc_low_level_init(void)
{
}
__WEAK void usb_dc_low_level_deinit(void)
{
}
int usb_dc_init(uint8_t busid)
{
usb_dc_low_level_init();
USBHS_DEVICE->HOST_CTRL = 0x00;
USBHS_DEVICE->HOST_CTRL = USBHS_PHY_SUSPENDM;
USBHS_DEVICE->CONTROL = 0;
#ifdef CONFIG_USB_HS
USBHS_DEVICE->CONTROL = USBHS_DMA_EN | USBHS_INT_BUSY_EN | USBHS_HIGH_SPEED;
#else
USBHS_DEVICE->CONTROL = USBHS_DMA_EN | USBHS_INT_BUSY_EN | USBHS_FULL_SPEED;
#endif
USBHS_DEVICE->INT_FG = 0xff;
USBHS_DEVICE->INT_EN = 0;
USBHS_DEVICE->INT_EN = USBHS_SETUP_ACT_EN | USBHS_TRANSFER_EN | USBHS_DETECT_EN;
USBHS_DEVICE->ENDP_TYPE = 0x00;
USBHS_DEVICE->BUF_MODE = 0x00;
USBHS_DEVICE->CONTROL |= USBHS_DEV_PU_EN;
return 0;
}
int usb_dc_deinit(uint8_t busid)
{
return 0;
}
int usbd_set_address(uint8_t busid, const uint8_t addr)
{
if (addr == 0) {
USBHS_DEVICE->DEV_AD = addr & 0xff;
}
g_ch32_usbhs_udc.dev_addr = addr;
return 0;
}
int usbd_set_remote_wakeup(uint8_t busid)
{
return -1;
}
uint8_t usbd_get_port_speed(uint8_t busid)
{
return USB_SPEED_HIGH;
}
int usbd_ep_open(uint8_t busid, const struct usb_endpoint_descriptor *ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep->bEndpointAddress);
if (USB_EP_DIR_IS_OUT(ep->bEndpointAddress)) {
g_ch32_usbhs_udc.out_ep[ep_idx].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
g_ch32_usbhs_udc.out_ep[ep_idx].ep_type = USB_GET_ENDPOINT_TYPE(ep->bmAttributes);
g_ch32_usbhs_udc.out_ep[ep_idx].ep_enable = true;
if (g_ch32_usbhs_udc.out_ep[ep_idx].ep_type == USB_ENDPOINT_TYPE_ISOCHRONOUS) {
USBHS_DEVICE->ENDP_TYPE |= (1 << (ep_idx + 16));
} else {
USBHS_DEVICE->ENDP_TYPE &= ~(1 << (ep_idx + 16));
}
USBHS_DEVICE->ENDP_CONFIG |= (1 << (ep_idx + 16));
USB_SET_RX_CTRL(ep_idx, USBHS_EP_R_RES_NAK | USBHS_EP_R_TOG_0 | USBHS_EP_R_AUTOTOG);
} else {
g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
g_ch32_usbhs_udc.in_ep[ep_idx].ep_type = USB_GET_ENDPOINT_TYPE(ep->bmAttributes);
g_ch32_usbhs_udc.in_ep[ep_idx].ep_enable = true;
if (g_ch32_usbhs_udc.in_ep[ep_idx].ep_type == USB_ENDPOINT_TYPE_ISOCHRONOUS) {
USBHS_DEVICE->ENDP_TYPE |= (1 << (ep_idx));
USB_SET_TX_CTRL(ep_idx, USBHS_EP_T_RES_NAK | USBHS_EP_T_TOG_0);
} else {
USBHS_DEVICE->ENDP_TYPE &= ~(1 << (ep_idx));
USB_SET_TX_CTRL(ep_idx, USBHS_EP_T_RES_NAK | USBHS_EP_T_TOG_0 | USBHS_EP_T_AUTOTOG);
}
USBHS_DEVICE->ENDP_CONFIG |= (1 << (ep_idx));
}
USB_SET_MAX_LEN(ep_idx, USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize));
return 0;
}
int usbd_ep_close(uint8_t busid, const uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
if (USB_EP_DIR_IS_OUT(ep)) {
USBHS_DEVICE->ENDP_CONFIG &= ~(1 << (ep_idx + 16));
} else {
USBHS_DEVICE->ENDP_CONFIG &= ~(1 << (ep_idx));
}
return 0;
}
int usbd_ep_set_stall(uint8_t busid, const uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
if (USB_EP_DIR_IS_OUT(ep)) {
if (ep_idx == 0) {
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_STALL;
} else {
USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBHS_EP_R_RES_MASK) | USBHS_EP_R_RES_STALL);
}
} else {
if (ep_idx == 0) {
USBHS_DEVICE->UEP0_TX_CTRL = USBHS_EP_T_RES_STALL;
} else {
USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~USBHS_EP_T_RES_MASK) | USBHS_EP_T_RES_STALL);
}
}
return 0;
}
int usbd_ep_clear_stall(uint8_t busid, const uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
if (USB_EP_DIR_IS_OUT(ep)) {
USB_SET_RX_CTRL(ep_idx, USBHS_EP_R_RES_ACK | USBHS_EP_R_TOG_0);
} else {
USB_SET_TX_CTRL(ep_idx, USBHS_EP_T_RES_NAK | USBHS_EP_T_TOG_0);
}
return 0;
}
int usbd_ep_is_stalled(uint8_t busid, const uint8_t ep, uint8_t *stalled)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
if (USB_EP_DIR_IS_OUT(ep)) {
*stalled = USB_GET_RX_CTRL(ep_idx) & USBHS_EP_R_RES_STALL ? 1 : 0;
} else {
*stalled = USB_GET_TX_CTRL(ep_idx) & USBHS_EP_T_RES_STALL ? 1 : 0;
}
return 0;
}
int usbd_ep_start_write(uint8_t busid, const uint8_t ep, const uint8_t *data, uint32_t data_len)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
uint32_t tmp;
if (!data && data_len) {
return -1;
}
if (!g_ch32_usbhs_udc.in_ep[ep_idx].ep_enable) {
return -2;
}
if ((uint32_t)data & 0x03) {
return -3;
}
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_buf = (uint8_t *)data;
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len = data_len;
g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len = 0;
if (ep_idx == 0) {
if (data_len == 0) {
USB_SET_TX_LEN(ep_idx, 0);
} else {
data_len = MIN(data_len, g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps);
USB_SET_TX_LEN(ep_idx, data_len);
USBHS_DEVICE->UEP0_DMA = (uint32_t)data;
}
tmp = ep0_tx_data_toggle ? USBHS_EP_T_TOG_1 : USBHS_EP_T_TOG_0;
USBHS_DEVICE->UEP0_TX_CTRL = USBHS_EP_T_RES_ACK | tmp;
} else {
if (data_len == 0) {
USB_SET_TX_LEN(ep_idx, 0);
} else {
data_len = MIN(data_len, g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps);
USB_SET_TX_LEN(ep_idx, data_len);
USB_SET_TX_DMA(ep_idx, (uint32_t)data);
}
tmp = USB_GET_TX_CTRL(ep_idx);
tmp &= ~(USBHS_EP_T_RES_MASK | USBHS_EP_T_TOG_MASK);
tmp |= USBHS_EP_T_RES_ACK;
if (g_ch32_usbhs_udc.in_ep[ep_idx].ep_type == USB_ENDPOINT_TYPE_ISOCHRONOUS) {
tmp |= USBHS_EP_T_TOG_0;
} else {
tmp |= (epx_tx_data_toggle[ep_idx - 1] ? USBHS_EP_T_TOG_1 : USBHS_EP_T_TOG_0);
}
USB_SET_TX_CTRL(ep_idx, tmp);
}
return 0;
}
int usbd_ep_start_read(uint8_t busid, const uint8_t ep, uint8_t *data, uint32_t data_len)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
if (!data && data_len) {
return -1;
}
if (!g_ch32_usbhs_udc.out_ep[ep_idx].ep_enable) {
return -2;
}
if ((uint32_t)data & 0x03) {
return -3;
}
g_ch32_usbhs_udc.out_ep[ep_idx].xfer_buf = (uint8_t *)data;
g_ch32_usbhs_udc.out_ep[ep_idx].xfer_len = data_len;
g_ch32_usbhs_udc.out_ep[ep_idx].actual_xfer_len = 0;
if (ep_idx == 0) {
if (data_len == 0) {
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK | USBHS_EP_R_TOG_1;
} else {
USBHS_DEVICE->UEP0_DMA = (uint32_t)data;
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK | (ep0_rx_data_toggle ? USBHS_EP_R_TOG_1 : USBHS_EP_R_TOG_0);
}
return 0;
} else {
USB_SET_RX_DMA(ep_idx, (uint32_t)data);
if (g_ch32_usbhs_udc.out_ep[ep_idx].ep_type == USB_ENDPOINT_TYPE_ISOCHRONOUS) {
USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~(USBHS_EP_R_RES_MASK | USBHS_EP_R_TOG_MASK)) | USBHS_EP_R_RES_ACK | USBHS_EP_R_TOG_0);
} else {
USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBHS_EP_R_RES_MASK) | USBHS_EP_R_RES_ACK);
}
}
return 0;
}
void USBD_IRQHandler(uint8_t busid)
{
uint32_t ep_idx, token, write_count, read_count;
uint8_t intflag = 0;
intflag = USBHS_DEVICE->INT_FG;
if (intflag & USBHS_TRANSFER_FLAG) {
ep_idx = (USBHS_DEVICE->INT_ST) & MASK_UIS_ENDP;
token = (((USBHS_DEVICE->INT_ST) & MASK_UIS_TOKEN) >> 4) & 0x03;
USBHS_DEVICE->INT_FG = USBHS_TRANSFER_FLAG;
if (token == PID_IN) {
USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~(USBHS_EP_T_RES_MASK | USBHS_EP_T_TOG_MASK)) | USBHS_EP_T_RES_NAK | USBHS_EP_T_TOG_0);
if (ep_idx == 0x00) {
if (g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len >= g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps) {
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len -= g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps;
g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps;
ep0_tx_data_toggle ^= 1;
} else {
g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len;
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len = 0;
ep0_tx_data_toggle = true;
}
usbd_event_ep_in_complete_handler(0, ep_idx | 0x80, g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len);
if (g_ch32_usbhs_udc.dev_addr > 0) {
USBHS_DEVICE->DEV_AD = g_ch32_usbhs_udc.dev_addr & 0xff;
g_ch32_usbhs_udc.dev_addr = 0;
}
if (g_ch32_usbhs_udc.setup.wLength && ((g_ch32_usbhs_udc.setup.bmRequestType & USB_REQUEST_DIR_MASK) == USB_REQUEST_DIR_OUT)) {
/* In status, start reading setup */
USBHS_DEVICE->UEP0_DMA = (uint32_t)&g_ch32_usbhs_udc.setup;
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK;
ep0_tx_data_toggle = true;
} else if (g_ch32_usbhs_udc.setup.wLength == 0) {
/* In status, start reading setup */
USBHS_DEVICE->UEP0_DMA = (uint32_t)&g_ch32_usbhs_udc.setup;
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK;
ep0_tx_data_toggle = true;
}
} else {
if (g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len > g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps) {
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_buf += g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps;
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len -= g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps;
g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps;
epx_tx_data_toggle[ep_idx - 1] ^= 1;
write_count = MIN(g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len, g_ch32_usbhs_udc.in_ep[ep_idx].ep_mps);
USB_SET_TX_LEN(ep_idx, write_count);
USB_SET_TX_DMA(ep_idx, (uint32_t)g_ch32_usbhs_udc.in_ep[ep_idx].xfer_buf);
uint32_t tmp = USB_GET_TX_CTRL(ep_idx);
tmp &= ~(USBHS_EP_T_RES_MASK | USBHS_EP_T_TOG_MASK);
tmp |= USBHS_EP_T_RES_ACK;
if (g_ch32_usbhs_udc.in_ep[ep_idx].ep_type == USB_ENDPOINT_TYPE_ISOCHRONOUS) {
tmp |= USBHS_EP_T_TOG_0;
} else {
tmp |= (epx_tx_data_toggle[ep_idx - 1] ? USBHS_EP_T_TOG_1 : USBHS_EP_T_TOG_0);
}
USB_SET_TX_CTRL(ep_idx, tmp);
} else {
g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len;
g_ch32_usbhs_udc.in_ep[ep_idx].xfer_len = 0;
epx_tx_data_toggle[ep_idx - 1] ^= 1;
usbd_event_ep_in_complete_handler(0, ep_idx | 0x80, g_ch32_usbhs_udc.in_ep[ep_idx].actual_xfer_len);
}
}
} else if (token == PID_OUT) {
USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBHS_EP_R_RES_MASK) | USBHS_EP_R_RES_NAK);
if (ep_idx == 0x00) {
read_count = USBHS_DEVICE->RX_LEN;
g_ch32_usbhs_udc.out_ep[ep_idx].actual_xfer_len += read_count;
g_ch32_usbhs_udc.out_ep[ep_idx].xfer_len -= read_count;
usbd_event_ep_out_complete_handler(0, 0x00, g_ch32_usbhs_udc.out_ep[ep_idx].actual_xfer_len);
if (read_count == 0) {
/* Out status, start reading setup */
USBHS_DEVICE->UEP0_DMA = (uint32_t)&g_ch32_usbhs_udc.setup;
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK;
ep0_rx_data_toggle = true;
ep0_tx_data_toggle = true;
} else {
ep0_rx_data_toggle ^= 1;
}
} else {
if (USBHS_DEVICE->INT_ST & USBHS_DEV_UIS_TOG_OK) {
read_count = USBHS_DEVICE->RX_LEN;
g_ch32_usbhs_udc.out_ep[ep_idx].xfer_buf += read_count;
g_ch32_usbhs_udc.out_ep[ep_idx].actual_xfer_len += read_count;
g_ch32_usbhs_udc.out_ep[ep_idx].xfer_len -= read_count;
if ((read_count < g_ch32_usbhs_udc.out_ep[ep_idx].ep_mps) || (g_ch32_usbhs_udc.out_ep[ep_idx].xfer_len == 0)) {
usbd_event_ep_out_complete_handler(0, ep_idx, g_ch32_usbhs_udc.out_ep[ep_idx].actual_xfer_len);
} else {
USB_SET_RX_DMA(ep_idx, (uint32_t)g_ch32_usbhs_udc.out_ep[ep_idx].xfer_buf);
USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBHS_EP_R_RES_MASK) | USBHS_EP_R_RES_ACK);
}
}
}
}
}
if (intflag & USBHS_SETUP_FLAG) {
USBHS_DEVICE->INT_FG = USBHS_SETUP_FLAG;
usbd_event_ep0_setup_complete_handler(0, (uint8_t *)&g_ch32_usbhs_udc.setup);
}
if (intflag & USBHS_DETECT_FLAG) {
USBHS_DEVICE->INT_FG = USBHS_DETECT_FLAG;
USBHS_DEVICE->ENDP_CONFIG = USBHS_EP0_T_EN | USBHS_EP0_R_EN;
USBHS_DEVICE->UEP0_TX_LEN = 0;
USBHS_DEVICE->UEP0_TX_CTRL = USBHS_EP_T_RES_NAK;
ep0_tx_data_toggle = true;
ep0_rx_data_toggle = true;
for (uint8_t ep_idx = 1; ep_idx < USB_NUM_BIDIR_ENDPOINTS; ep_idx++) {
USB_SET_TX_LEN(ep_idx, 0);
USB_SET_TX_CTRL(ep_idx, USBHS_EP_T_AUTOTOG | USBHS_EP_T_RES_NAK); // autotog does not work
USB_SET_RX_CTRL(ep_idx, USBHS_EP_R_AUTOTOG | USBHS_EP_R_RES_NAK);
epx_tx_data_toggle[ep_idx - 1] = false;
}
memset(&g_ch32_usbhs_udc, 0, sizeof(struct ch32_usbhs_udc));
usbd_event_reset_handler(0);
USBHS_DEVICE->UEP0_DMA = (uint32_t)&g_ch32_usbhs_udc.setup;
USBHS_DEVICE->UEP0_RX_CTRL = USBHS_EP_R_RES_ACK;
}
}
void USBHS_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void USBHS_IRQHandler(void)
{
extern void USBD_IRQHandler(uint8_t busid);
USBD_IRQHandler(0);
}
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