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/*
* Copyright (c) 2022, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbh_core.h"
#include "usbh_cdc_acm.h"
#define DEV_FORMAT "/dev/ttyACM%d"
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX struct cdc_line_coding g_cdc_line_coding;
static struct usbh_cdc_acm g_cdc_acm_class[CONFIG_USBHOST_MAX_CDC_ACM_CLASS];
static uint32_t g_devinuse = 0;
static struct usbh_cdc_acm *usbh_cdc_acm_class_alloc(void)
{
int devno;
for (devno = 0; devno < CONFIG_USBHOST_MAX_CDC_ACM_CLASS; devno++) {
if ((g_devinuse & (1 << devno)) == 0) {
g_devinuse |= (1 << devno);
memset(&g_cdc_acm_class[devno], 0, sizeof(struct usbh_cdc_acm));
g_cdc_acm_class[devno].minor = devno;
return &g_cdc_acm_class[devno];
}
}
return NULL;
}
static void usbh_cdc_acm_class_free(struct usbh_cdc_acm *cdc_acm_class)
{
int devno = cdc_acm_class->minor;
if (devno >= 0 && devno < 32) {
g_devinuse &= ~(1 << devno);
}
memset(cdc_acm_class, 0, sizeof(struct usbh_cdc_acm));
}
int usbh_cdc_acm_set_line_coding(struct usbh_cdc_acm *cdc_acm_class, struct cdc_line_coding *line_coding)
{
struct usb_setup_packet *setup = cdc_acm_class->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 = cdc_acm_class->ctrl_intf;
setup->wLength = 7;
memcpy((uint8_t *)&g_cdc_line_coding, line_coding, sizeof(struct cdc_line_coding));
return usbh_control_transfer(cdc_acm_class->hport->ep0, setup, (uint8_t *)&g_cdc_line_coding);
}
int usbh_cdc_acm_get_line_coding(struct usbh_cdc_acm *cdc_acm_class, struct cdc_line_coding *line_coding)
{
struct usb_setup_packet *setup = cdc_acm_class->hport->setup;
int ret;
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 = cdc_acm_class->ctrl_intf;
setup->wLength = 7;
ret = usbh_control_transfer(cdc_acm_class->hport->ep0, setup, (uint8_t *)&g_cdc_line_coding);
if (ret < 0) {
return ret;
}
memcpy(line_coding, (uint8_t *)&g_cdc_line_coding, sizeof(struct cdc_line_coding));
return ret;
}
int usbh_cdc_acm_set_line_state(struct usbh_cdc_acm *cdc_acm_class, bool dtr, bool rts)
{
struct usb_setup_packet *setup = cdc_acm_class->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 = cdc_acm_class->ctrl_intf;
setup->wLength = 0;
cdc_acm_class->dtr = dtr;
cdc_acm_class->rts = rts;
return usbh_control_transfer(cdc_acm_class->hport->ep0, setup, NULL);
}
static int usbh_cdc_acm_connect(struct usbh_hubport *hport, uint8_t intf)
{
struct usb_endpoint_descriptor *ep_desc;
int ret;
struct usbh_cdc_acm *cdc_acm_class = usbh_cdc_acm_class_alloc();
if (cdc_acm_class == NULL) {
USB_LOG_ERR("Fail to alloc cdc_acm_class\r\n");
return -ENOMEM;
}
cdc_acm_class->hport = hport;
cdc_acm_class->ctrl_intf = intf;
cdc_acm_class->data_intf = intf + 1;
hport->config.intf[intf].priv = cdc_acm_class;
hport->config.intf[intf + 1].priv = NULL;
cdc_acm_class->linecoding.dwDTERate = 115200;
cdc_acm_class->linecoding.bDataBits = 8;
cdc_acm_class->linecoding.bParityType = 0;
cdc_acm_class->linecoding.bCharFormat = 0;
ret = usbh_cdc_acm_set_line_coding(cdc_acm_class, &cdc_acm_class->linecoding);
if (ret < 0) {
USB_LOG_ERR("Fail to set linecoding\r\n");
return ret;
}
ret = usbh_cdc_acm_set_line_state(cdc_acm_class, true, true);
if (ret < 0) {
USB_LOG_ERR("Fail to set line state\r\n");
return ret;
}
#ifdef CONFIG_USBHOST_CDC_ACM_NOTIFY
ep_desc = &hport->config.intf[intf].altsetting[0].ep[0].ep_desc;
usbh_hport_activate_epx(&cdc_acm_class->intin, hport, ep_desc);
#endif
for (uint8_t i = 0; i < hport->config.intf[intf + 1].altsetting[0].intf_desc.bNumEndpoints; i++) {
ep_desc = &hport->config.intf[intf + 1].altsetting[0].ep[i].ep_desc;
if (ep_desc->bEndpointAddress & 0x80) {
usbh_hport_activate_epx(&cdc_acm_class->bulkin, hport, ep_desc);
} else {
usbh_hport_activate_epx(&cdc_acm_class->bulkout, hport, ep_desc);
}
}
snprintf(hport->config.intf[intf].devname, CONFIG_USBHOST_DEV_NAMELEN, DEV_FORMAT, cdc_acm_class->minor);
USB_LOG_INFO("Register CDC ACM Class:%s\r\n", hport->config.intf[intf].devname);
usbh_cdc_acm_run(cdc_acm_class);
return ret;
}
static int usbh_cdc_acm_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
int ret = 0;
struct usbh_cdc_acm *cdc_acm_class = (struct usbh_cdc_acm *)hport->config.intf[intf].priv;
if (cdc_acm_class) {
if (cdc_acm_class->bulkin) {
usbh_pipe_free(cdc_acm_class->bulkin);
}
if (cdc_acm_class->bulkout) {
usbh_pipe_free(cdc_acm_class->bulkout);
}
if (hport->config.intf[intf].devname[0] != '\0') {
USB_LOG_INFO("Unregister CDC ACM Class:%s\r\n", hport->config.intf[intf].devname);
usbh_cdc_acm_stop(cdc_acm_class);
}
usbh_cdc_acm_class_free(cdc_acm_class);
}
return ret;
}
static int usbh_cdc_data_connect(struct usbh_hubport *hport, uint8_t intf)
{
return 0;
}
static int usbh_cdc_data_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
return 0;
}
__WEAK void usbh_cdc_acm_run(struct usbh_cdc_acm *cdc_acm_class)
{
}
__WEAK void usbh_cdc_acm_stop(struct usbh_cdc_acm *cdc_acm_class)
{
}
const struct usbh_class_driver cdc_acm_class_driver = {
.driver_name = "cdc_acm",
.connect = usbh_cdc_acm_connect,
.disconnect = usbh_cdc_acm_disconnect
};
const struct usbh_class_driver cdc_data_class_driver = {
.driver_name = "cdc_data",
.connect = usbh_cdc_data_connect,
.disconnect = usbh_cdc_data_disconnect
};
CLASS_INFO_DEFINE const struct usbh_class_info cdc_acm_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.class = USB_DEVICE_CLASS_CDC,
.subclass = CDC_ABSTRACT_CONTROL_MODEL,
.protocol = CDC_COMMON_PROTOCOL_AT_COMMANDS,
.vid = 0x00,
.pid = 0x00,
.class_driver = &cdc_acm_class_driver
};
CLASS_INFO_DEFINE const struct usbh_class_info cdc_data_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS,
.class = USB_DEVICE_CLASS_CDC_DATA,
.subclass = 0x00,
.protocol = 0x00,
.vid = 0x00,
.pid = 0x00,
.class_driver = &cdc_data_class_driver
};
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