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/*
* Copyright (c) 2022 ~ 2025, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbh_core.h"
#include "usbh_serial.h"
#include "usbh_cdc_acm.h"
#undef USB_DBG_TAG
#define USB_DBG_TAG "usbh_cdc_acm"
#include "usb_log.h"
struct usbh_cdc_acm {
struct usb_endpoint_descriptor *intin;
struct usbh_urb intin_urb;
struct usb_osal_timer *modem_timer;
uint16_t modem_status;
};
static int usbh_cdc_acm_attach(struct usbh_serial *serial)
{
struct usb_endpoint_descriptor *ep_desc;
int ret;
struct usbh_cdc_acm *cdc_acm_class = usb_osal_malloc(sizeof(struct usbh_cdc_acm));
if (!cdc_acm_class) {
USB_LOG_ERR("No memory for cdc_acm_class\r\n");
return -USB_ERR_NOMEM;
}
memset(cdc_acm_class, 0, sizeof(struct usbh_cdc_acm));
serial->priv = cdc_acm_class;
for (uint8_t i = 0; i < serial->hport->config.intf[serial->intf].altsetting[0].intf_desc.bNumEndpoints; i++) {
ep_desc = &serial->hport->config.intf[serial->intf].altsetting[0].ep[i].ep_desc;
if (USB_GET_ENDPOINT_TYPE(ep_desc->bmAttributes) == USB_ENDPOINT_TYPE_INTERRUPT) {
if (ep_desc->bEndpointAddress & 0x80) {
USBH_EP_INIT(cdc_acm_class->intin, ep_desc);
break;
} else {
}
}
}
if (!cdc_acm_class->intin) {
USB_LOG_ERR("Failed to find interrupt endpoint\r\n");
ret = -USB_ERR_NODEV;
goto errout;
}
return 0;
errout:
serial->priv = NULL;
usb_osal_free(cdc_acm_class);
return ret;
}
static void usbh_cdc_acm_detach(struct usbh_serial *serial)
{
struct usbh_cdc_acm *cdc_acm_class;
if (!serial || !serial->priv) {
return;
}
cdc_acm_class = (struct usbh_cdc_acm *)serial->priv;
if (cdc_acm_class->intin) {
usbh_kill_urb(&cdc_acm_class->intin_urb);
}
serial->priv = NULL;
usb_osal_free(cdc_acm_class);
}
static int usbh_cdc_acm_set_line_coding(struct usbh_serial *serial, struct cdc_line_coding *line_coding)
{
struct usb_setup_packet *setup;
if (!serial || !serial->hport) {
return -USB_ERR_INVAL;
}
setup = serial->hport->setup;
setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = CDC_REQUEST_SET_LINE_CODING;
setup->wValue = 0;
setup->wIndex = serial->intf;
setup->wLength = 7;
memcpy(serial->iobuffer, line_coding, sizeof(struct cdc_line_coding));
return usbh_control_transfer(serial->hport, setup, serial->iobuffer);
}
static int usbh_cdc_acm_get_line_coding(struct usbh_serial *serial, struct cdc_line_coding *line_coding)
{
struct usb_setup_packet *setup;
int ret;
if (!serial || !serial->hport) {
return -USB_ERR_INVAL;
}
setup = serial->hport->setup;
setup->bmRequestType = USB_REQUEST_DIR_IN | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = CDC_REQUEST_GET_LINE_CODING;
setup->wValue = 0;
setup->wIndex = serial->intf;
setup->wLength = 7;
ret = usbh_control_transfer(serial->hport, setup, serial->iobuffer);
if (ret < 0) {
return ret;
}
memcpy(line_coding, serial->iobuffer, sizeof(struct cdc_line_coding));
return ret;
}
static int usbh_cdc_acm_set_line_state(struct usbh_serial *serial, bool dtr, bool rts)
{
struct usb_setup_packet *setup;
if (!serial || !serial->hport) {
return -USB_ERR_INVAL;
}
setup = serial->hport->setup;
setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = CDC_REQUEST_SET_CONTROL_LINE_STATE;
setup->wValue = (dtr << 0) | (rts << 1);
setup->wIndex = serial->intf;
setup->wLength = 0;
return usbh_control_transfer(serial->hport, setup, NULL);
}
static int usbh_cdc_acm_get_modem_status(struct usbh_serial *serial)
{
struct usbh_cdc_acm *cdc_acm_class;
uintptr_t flags;
uint16_t status;
if (!serial || !serial->hport || !serial->priv) {
return -USB_ERR_INVAL;
}
flags = usb_osal_enter_critical_section();
cdc_acm_class = (struct usbh_cdc_acm *)serial->priv;
status = (cdc_acm_class->modem_status & CDC_SERIAL_STATE_DSR ? USBH_SERIAL_TIOCM_DSR : 0) |
(cdc_acm_class->modem_status & CDC_SERIAL_STATE_RING ? USBH_SERIAL_TIOCM_RI : 0) |
(cdc_acm_class->modem_status & CDC_SERIAL_STATE_DCD ? USBH_SERIAL_TIOCM_CD : 0) |
(serial->line_state & USBH_SERIAL_TIOCM_DTR ? USBH_SERIAL_TIOCM_DTR : 0) |
(serial->line_state & USBH_SERIAL_TIOCM_RTS ? USBH_SERIAL_TIOCM_RTS : 0);
usb_osal_leave_critical_section(flags);
return status;
}
#ifdef CONFIG_USBH_SERIAL_GET_MODEM_STATUS
static int __usbh_cdc_acm_get_modem_status(struct usbh_serial *serial)
{
struct usbh_cdc_acm *cdc_acm_class;
struct cdc_acm_notification *notification;
uint16_t difference;
uintptr_t flags;
int ret;
if (!serial || !serial->hport || !serial->priv) {
return -USB_ERR_INVAL;
}
cdc_acm_class = (struct usbh_cdc_acm *)serial->priv;
usbh_int_urb_fill(&cdc_acm_class->intin_urb, serial->hport, cdc_acm_class->intin, &serial->iobuffer[USBH_SERIAL_INT_NOCACHE_OFFSET], cdc_acm_class->intin->wMaxPacketSize, 0xffffffff, NULL, NULL);
ret = usbh_submit_urb(&cdc_acm_class->intin_urb);
if (ret < 0) {
return ret;
}
if (cdc_acm_class->intin_urb.actual_length < sizeof(struct cdc_acm_notification)) {
return -USB_ERR_INVAL;
}
notification = (struct cdc_acm_notification *)&serial->iobuffer[USBH_SERIAL_INT_NOCACHE_OFFSET];
if (notification->bNotificationType != CDC_NOTIFICATION_SERIAL_STATE) {
return -USB_ERR_INVAL;
}
flags = usb_osal_enter_critical_section();
difference = cdc_acm_class->modem_status ^ notification->data;
cdc_acm_class->modem_status = notification->data;
if (difference & CDC_SERIAL_STATE_DSR)
serial->iocount.dsr++;
if (difference & CDC_SERIAL_STATE_DCD)
serial->iocount.dcd++;
if (notification->data & CDC_SERIAL_STATE_BREAK)
serial->iocount.brk++;
if (notification->data & CDC_SERIAL_STATE_FRAMING)
serial->iocount.frame++;
if (notification->data & CDC_SERIAL_STATE_PARITY)
serial->iocount.parity++;
if (notification->data & CDC_SERIAL_STATE_OVERRUN)
serial->iocount.overrun++;
usb_osal_leave_critical_section(flags);
return ret;
}
#endif
static const struct usbh_serial_driver cdc_acm_driver = {
.driver_name = "cdc_acm",
.ignore_rx_header = 0,
.ignore_tx_header = 0,
.attach = usbh_cdc_acm_attach,
.detach = usbh_cdc_acm_detach,
.set_flow_control = NULL,
.set_line_coding = usbh_cdc_acm_set_line_coding,
.get_line_coding = usbh_cdc_acm_get_line_coding,
.set_line_state = usbh_cdc_acm_set_line_state,
.get_modem_status = usbh_cdc_acm_get_modem_status,
};
static int usbh_cdc_acm_connect(struct usbh_hubport *hport, uint8_t intf)
{
return usbh_serial_probe(hport, intf, &cdc_acm_driver) ? 0 : -USB_ERR_NOMEM;
}
static int usbh_cdc_acm_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
struct usbh_serial *serial = (struct usbh_serial *)hport->config.intf[intf].priv;
if (serial) {
usbh_serial_remove(serial);
}
return 0;
}
const struct usbh_class_driver cdc_acm_class_driver = {
.driver_name = "cdc_acm",
.connect = usbh_cdc_acm_connect,
.disconnect = usbh_cdc_acm_disconnect
};
CLASS_INFO_DEFINE const struct usbh_class_info cdc_acm_none_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.bInterfaceClass = USB_DEVICE_CLASS_CDC,
.bInterfaceSubClass = CDC_ABSTRACT_CONTROL_MODEL,
.bInterfaceProtocol = CDC_COMMON_PROTOCOL_NONE,
.id_table = NULL,
.class_driver = &cdc_acm_class_driver
};
CLASS_INFO_DEFINE const struct usbh_class_info cdc_acm_at_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.bInterfaceClass = USB_DEVICE_CLASS_CDC,
.bInterfaceSubClass = CDC_ABSTRACT_CONTROL_MODEL,
.bInterfaceProtocol = CDC_COMMON_PROTOCOL_AT_COMMANDS,
.id_table = NULL,
.class_driver = &cdc_acm_class_driver
};
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