400 lines
12 KiB
C
400 lines
12 KiB
C
/*
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* Copyright (c) 2024, sakumisu
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "usbh_core.h"
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#include "usbh_ftdi.h"
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#define DEV_FORMAT "/dev/ttyUSB%d"
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USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_ftdi_buf[64];
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#define CONFIG_USBHOST_MAX_FTDI_CLASS 1
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static struct usbh_ftdi g_ftdi_class[CONFIG_USBHOST_MAX_FTDI_CLASS];
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static uint32_t g_devinuse = 0;
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static struct usbh_ftdi *usbh_ftdi_class_alloc(void)
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{
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uint8_t devno;
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for (devno = 0; devno < CONFIG_USBHOST_MAX_FTDI_CLASS; devno++) {
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if ((g_devinuse & (1U << devno)) == 0) {
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g_devinuse |= (1U << devno);
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memset(&g_ftdi_class[devno], 0, sizeof(struct usbh_ftdi));
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g_ftdi_class[devno].minor = devno;
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return &g_ftdi_class[devno];
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}
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}
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return NULL;
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}
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static void usbh_ftdi_class_free(struct usbh_ftdi *ftdi_class)
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{
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uint8_t devno = ftdi_class->minor;
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if (devno < 32) {
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g_devinuse &= ~(1U << devno);
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}
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memset(ftdi_class, 0, sizeof(struct usbh_ftdi));
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}
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static void usbh_ftdi_caculate_baudrate(uint32_t *itdf_divisor, uint32_t actual_baudrate)
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{
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#define FTDI_USB_CLK 48000000
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int baudrate;
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uint8_t frac[] = { 0, 8, 4, 2, 6, 10, 12, 14 };
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if (actual_baudrate == 2000000) {
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*itdf_divisor = 0x01;
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} else if (actual_baudrate == 3000000) {
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*itdf_divisor = 0x00;
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} else {
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baudrate = actual_baudrate;
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if (baudrate > 100000 && baudrate < 12000000) {
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baudrate = (baudrate / 100000) + 100000;
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}
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int divisor = FTDI_USB_CLK / baudrate;
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int frac_bits = 0;
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for (uint8_t i = 0; i < sizeof(frac) / sizeof(frac[0]); i++) {
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if ((divisor & 0xF) == frac[i]) {
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frac_bits = i;
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break;
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}
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}
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divisor >>= 4;
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divisor &= 0x3FFF;
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*itdf_divisor = (divisor << 14) | (frac_bits << 8);
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}
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}
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int usbh_ftdi_reset(struct usbh_ftdi *ftdi_class)
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{
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struct usb_setup_packet *setup;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_RESET_REQUEST;
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setup->wValue = 0;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_set_modem(struct usbh_ftdi *ftdi_class, uint16_t value)
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{
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struct usb_setup_packet *setup;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_SET_MODEM_CTRL_REQUEST;
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setup->wValue = value;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_set_baudrate(struct usbh_ftdi *ftdi_class, uint32_t baudrate)
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{
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struct usb_setup_packet *setup;
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uint32_t itdf_divisor;
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uint16_t value;
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uint8_t baudrate_high;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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usbh_ftdi_caculate_baudrate(&itdf_divisor, baudrate);
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value = itdf_divisor & 0xFFFF;
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baudrate_high = (itdf_divisor >> 16) & 0xff;
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_SET_BAUDRATE_REQUEST;
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setup->wValue = value;
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setup->wIndex = (baudrate_high << 8) | ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_set_data_format(struct usbh_ftdi *ftdi_class, uint8_t databits, uint8_t parity, uint8_t stopbits, uint8_t isbreak)
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{
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/**
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* D0-D7 databits BITS_7=7, BITS_8=8
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* D8-D10 parity NONE=0, ODD=1, EVEN=2, MARK=3, SPACE=4
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* D11-D12 STOP_BIT_1=0, STOP_BIT_15=1, STOP_BIT_2=2
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* D14 BREAK_OFF=0, BREAK_ON=1
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**/
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struct usb_setup_packet *setup;
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uint16_t value;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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value = ((isbreak & 0x01) << 14) | ((stopbits & 0x03) << 11) | ((parity & 0x0f) << 8) | (databits & 0x0f);
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_SET_DATA_REQUEST;
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setup->wValue = value;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_set_latency_timer(struct usbh_ftdi *ftdi_class, uint16_t value)
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{
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struct usb_setup_packet *setup;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_SET_LATENCY_TIMER_REQUEST;
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setup->wValue = value;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_set_flow_ctrl(struct usbh_ftdi *ftdi_class, uint16_t value)
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{
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struct usb_setup_packet *setup;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_SET_FLOW_CTRL_REQUEST;
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setup->wValue = value;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 0;
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return usbh_control_transfer(ftdi_class->hport, setup, NULL);
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}
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static int usbh_ftdi_read_modem_status(struct usbh_ftdi *ftdi_class)
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{
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struct usb_setup_packet *setup;
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int ret;
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if (!ftdi_class || !ftdi_class->hport) {
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return -USB_ERR_INVAL;
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}
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setup = ftdi_class->hport->setup;
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setup->bmRequestType = USB_REQUEST_DIR_IN | USB_REQUEST_VENDOR | USB_REQUEST_RECIPIENT_DEVICE;
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setup->bRequest = SIO_POLL_MODEM_STATUS_REQUEST;
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setup->wValue = 0x0000;
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setup->wIndex = ftdi_class->intf;
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setup->wLength = 2;
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ret = usbh_control_transfer(ftdi_class->hport, setup, g_ftdi_buf);
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if (ret < 0) {
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return ret;
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}
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memcpy(ftdi_class->modem_status, g_ftdi_buf, 2);
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return ret;
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}
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int usbh_ftdi_set_line_coding(struct usbh_ftdi *ftdi_class, struct cdc_line_coding *line_coding)
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{
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memcpy((uint8_t *)&ftdi_class->line_coding, line_coding, sizeof(struct cdc_line_coding));
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usbh_ftdi_set_baudrate(ftdi_class, line_coding->dwDTERate);
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return usbh_ftdi_set_data_format(ftdi_class, line_coding->bDataBits, line_coding->bParityType, line_coding->bCharFormat, 0);
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}
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int usbh_ftdi_get_line_coding(struct usbh_ftdi *ftdi_class, struct cdc_line_coding *line_coding)
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{
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memcpy(line_coding, (uint8_t *)&ftdi_class->line_coding, sizeof(struct cdc_line_coding));
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return 0;
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}
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int usbh_ftdi_set_line_state(struct usbh_ftdi *ftdi_class, bool dtr, bool rts)
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{
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int ret;
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if (dtr) {
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usbh_ftdi_set_modem(ftdi_class, SIO_SET_DTR_HIGH);
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} else {
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usbh_ftdi_set_modem(ftdi_class, SIO_SET_DTR_LOW);
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}
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if (rts) {
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ret = usbh_ftdi_set_modem(ftdi_class, SIO_SET_RTS_HIGH);
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} else {
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ret = usbh_ftdi_set_modem(ftdi_class, SIO_SET_RTS_LOW);
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}
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return ret;
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}
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static int usbh_ftdi_connect(struct usbh_hubport *hport, uint8_t intf)
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{
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struct usb_endpoint_descriptor *ep_desc;
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int ret = 0;
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struct usbh_ftdi *ftdi_class = usbh_ftdi_class_alloc();
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if (ftdi_class == NULL) {
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USB_LOG_ERR("Fail to alloc ftdi_class\r\n");
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return -USB_ERR_NOMEM;
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}
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ftdi_class->hport = hport;
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ftdi_class->intf = intf;
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hport->config.intf[intf].priv = ftdi_class;
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usbh_ftdi_reset(ftdi_class);
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usbh_ftdi_set_flow_ctrl(ftdi_class, SIO_DISABLE_FLOW_CTRL);
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usbh_ftdi_set_latency_timer(ftdi_class, 0x10);
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usbh_ftdi_read_modem_status(ftdi_class);
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USB_LOG_INFO("modem status:%02x:%02x\r\n", ftdi_class->modem_status[0], ftdi_class->modem_status[1]);
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for (uint8_t i = 0; i < hport->config.intf[intf].altsetting[0].intf_desc.bNumEndpoints; i++) {
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ep_desc = &hport->config.intf[intf].altsetting[0].ep[i].ep_desc;
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if (ep_desc->bEndpointAddress & 0x80) {
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USBH_EP_INIT(ftdi_class->bulkin, ep_desc);
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} else {
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USBH_EP_INIT(ftdi_class->bulkout, ep_desc);
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}
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}
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snprintf(hport->config.intf[intf].devname, CONFIG_USBHOST_DEV_NAMELEN, DEV_FORMAT, ftdi_class->minor);
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USB_LOG_INFO("Register FTDI Class:%s\r\n", hport->config.intf[intf].devname);
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#if 0
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USB_LOG_INFO("Test ftdi rx and tx and rx for 5 times, baudrate is 115200\r\n");
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struct cdc_line_coding linecoding;
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uint8_t count = 5;
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linecoding.dwDTERate = 115200;
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linecoding.bDataBits = 8;
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linecoding.bParityType = 0;
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linecoding.bCharFormat = 0;
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usbh_ftdi_set_line_coding(ftdi_class, &linecoding);
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usbh_ftdi_set_line_state(ftdi_class, true, false);
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memset(g_ftdi_buf, 'a', sizeof(g_ftdi_buf));
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ret = usbh_ftdi_bulk_out_transfer(ftdi_class, g_ftdi_buf, sizeof(g_ftdi_buf), 0xfffffff);
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USB_LOG_RAW("out ret:%d\r\n", ret);
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while (count--) {
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ret = usbh_ftdi_bulk_in_transfer(ftdi_class, g_ftdi_buf, sizeof(g_ftdi_buf), 0xfffffff);
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USB_LOG_RAW("in ret:%d\r\n", ret);
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if (ret > 0) {
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for (uint32_t i = 0; i < ret; i++) {
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USB_LOG_RAW("%02x ", g_ftdi_buf[i]);
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}
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}
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USB_LOG_RAW("\r\n");
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}
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#endif
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usbh_ftdi_run(ftdi_class);
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return ret;
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}
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static int usbh_ftdi_disconnect(struct usbh_hubport *hport, uint8_t intf)
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{
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int ret = 0;
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struct usbh_ftdi *ftdi_class = (struct usbh_ftdi *)hport->config.intf[intf].priv;
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if (ftdi_class) {
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if (ftdi_class->bulkin) {
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usbh_kill_urb(&ftdi_class->bulkin_urb);
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}
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if (ftdi_class->bulkout) {
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usbh_kill_urb(&ftdi_class->bulkout_urb);
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}
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if (hport->config.intf[intf].devname[0] != '\0') {
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USB_LOG_INFO("Unregister FTDI Class:%s\r\n", hport->config.intf[intf].devname);
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usbh_ftdi_stop(ftdi_class);
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}
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usbh_ftdi_class_free(ftdi_class);
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}
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return ret;
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}
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int usbh_ftdi_bulk_in_transfer(struct usbh_ftdi *ftdi_class, uint8_t *buffer, uint32_t buflen, uint32_t timeout)
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{
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int ret;
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struct usbh_urb *urb = &ftdi_class->bulkin_urb;
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usbh_bulk_urb_fill(urb, ftdi_class->hport, ftdi_class->bulkin, buffer, buflen, timeout, NULL, NULL);
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ret = usbh_submit_urb(urb);
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if (ret == 0) {
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ret = urb->actual_length;
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}
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return ret;
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}
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int usbh_ftdi_bulk_out_transfer(struct usbh_ftdi *ftdi_class, uint8_t *buffer, uint32_t buflen, uint32_t timeout)
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{
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int ret;
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struct usbh_urb *urb = &ftdi_class->bulkout_urb;
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usbh_bulk_urb_fill(urb, ftdi_class->hport, ftdi_class->bulkout, buffer, buflen, timeout, NULL, NULL);
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ret = usbh_submit_urb(urb);
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if (ret == 0) {
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ret = urb->actual_length;
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}
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return ret;
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}
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__WEAK void usbh_ftdi_run(struct usbh_ftdi *ftdi_class)
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{
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(void)ftdi_class;
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}
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__WEAK void usbh_ftdi_stop(struct usbh_ftdi *ftdi_class)
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{
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(void)ftdi_class;
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}
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static const uint16_t ftdi_id_table[][2] = {
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{ 0x0403, 0x6001 },
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{ 0x0403, 0x6010 },
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{ 0, 0 },
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};
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const struct usbh_class_driver ftdi_class_driver = {
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.driver_name = "ftdi",
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.connect = usbh_ftdi_connect,
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.disconnect = usbh_ftdi_disconnect
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};
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CLASS_INFO_DEFINE const struct usbh_class_info ftdi_class_info = {
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.match_flags = USB_CLASS_MATCH_VID_PID | USB_CLASS_MATCH_INTF_CLASS,
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.bInterfaceClass = 0xff,
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.bInterfaceSubClass = 0x00,
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.bInterfaceProtocol = 0x00,
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.id_table = ftdi_id_table,
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.class_driver = &ftdi_class_driver
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}; |