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#include "furi_hal_version.h"
#include "furi_hal_usb_i.h"
#include "furi_hal_usb.h"
#include <furi_hal_power.h>
#include <furi.h>
#include "usb.h"
#define TAG "FuriHalUsb"
#define USB_RECONNECT_DELAY 500
static FuriHalUsbInterface* usb_if_cur;
static FuriHalUsbInterface* usb_if_next;
static const struct usb_string_descriptor dev_lang_desc = USB_ARRAY_DESC(USB_LANGID_ENG_US);
static uint32_t ubuf[0x20];
usbd_device udev;
static FuriHalUsbStateCallback callback;
static void* cb_ctx;
static usbd_respond usb_descriptor_get(usbd_ctlreq* req, void** address, uint16_t* length);
static void reset_evt(usbd_device* dev, uint8_t event, uint8_t ep);
static void susp_evt(usbd_device* dev, uint8_t event, uint8_t ep);
static void wkup_evt(usbd_device* dev, uint8_t event, uint8_t ep);
struct UsbCfg {
osTimerId_t reconnect_tmr;
bool enabled;
bool connected;
bool mode_changing;
} usb_config;
static void furi_hal_usb_tmr_cb(void* context);
/* Low-level init */
void furi_hal_usb_init(void) {
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
LL_PWR_EnableVddUSB();
GPIO_InitStruct.Pin = LL_GPIO_PIN_11 | LL_GPIO_PIN_12;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_10;
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
usbd_init(&udev, &usbd_hw, USB_EP0_SIZE, ubuf, sizeof(ubuf));
usbd_enable(&udev, true);
usbd_reg_descr(&udev, usb_descriptor_get);
usbd_reg_event(&udev, usbd_evt_susp, susp_evt);
usbd_reg_event(&udev, usbd_evt_wkup, wkup_evt);
// Reset callback will be enabled after first mode change to avoid getting false reset events
usb_config.enabled = false;
usb_config.reconnect_tmr = NULL;
HAL_NVIC_SetPriority(USB_LP_IRQn, 5, 0);
NVIC_EnableIRQ(USB_LP_IRQn);
FURI_LOG_I(TAG, "Init OK");
}
void furi_hal_usb_set_config(FuriHalUsbInterface* new_if) {
if((new_if != usb_if_cur) && (usb_config.enabled)) { // Interface mode change - first stage
usb_config.mode_changing = true;
usb_if_next = new_if;
if(usb_config.reconnect_tmr == NULL)
usb_config.reconnect_tmr = osTimerNew(furi_hal_usb_tmr_cb, osTimerOnce, NULL, NULL);
furi_hal_usb_disable();
usb_config.mode_changing = true;
osTimerStart(usb_config.reconnect_tmr, USB_RECONNECT_DELAY);
} else if(
(usb_config.mode_changing) &&
(usb_if_next != new_if)) { // Last interface mode change wasn't completed
osTimerStop(usb_config.reconnect_tmr);
usb_if_next = new_if;
osTimerStart(usb_config.reconnect_tmr, USB_RECONNECT_DELAY);
} else { // Interface mode change - second stage
if(usb_if_cur != NULL) usb_if_cur->deinit(&udev);
if(new_if != NULL) {
new_if->init(&udev, new_if);
usbd_reg_event(&udev, usbd_evt_reset, reset_evt);
FURI_LOG_I(TAG, "USB Mode change done");
usb_config.enabled = true;
usb_if_cur = new_if;
usb_config.mode_changing = false;
}
}
}
void furi_hal_usb_reinit() {
// Temporary disable callback to avoid getting false reset events
usbd_reg_event(&udev, usbd_evt_reset, NULL);
FURI_LOG_I(TAG, "USB Reinit");
furi_hal_usb_disable();
usbd_enable(&udev, false);
usbd_enable(&udev, true);
if(usb_config.reconnect_tmr == NULL)
usb_config.reconnect_tmr = osTimerNew(furi_hal_usb_tmr_cb, osTimerOnce, NULL, NULL);
usb_config.mode_changing = true;
usb_if_next = usb_if_cur;
osTimerStart(usb_config.reconnect_tmr, USB_RECONNECT_DELAY);
}
FuriHalUsbInterface* furi_hal_usb_get_config() {
return usb_if_cur;
}
void furi_hal_usb_disable() {
if(usb_config.enabled) {
susp_evt(&udev, 0, 0);
usbd_connect(&udev, false);
usb_config.enabled = false;
FURI_LOG_I(TAG, "USB Disable");
}
}
void furi_hal_usb_enable() {
if((!usb_config.enabled) && (usb_if_cur != NULL)) {
usbd_connect(&udev, true);
usb_config.enabled = true;
FURI_LOG_I(TAG, "USB Enable");
}
}
static void furi_hal_usb_tmr_cb(void* context) {
furi_hal_usb_set_config(usb_if_next);
}
/* Get device / configuration descriptors */
static usbd_respond usb_descriptor_get(usbd_ctlreq* req, void** address, uint16_t* length) {
const uint8_t dtype = req->wValue >> 8;
const uint8_t dnumber = req->wValue & 0xFF;
const void* desc;
uint16_t len = 0;
if(usb_if_cur == NULL) return usbd_fail;
switch(dtype) {
case USB_DTYPE_DEVICE:
if(callback != NULL) {
callback(FuriHalUsbStateEventDescriptorRequest, cb_ctx);
}
desc = usb_if_cur->dev_descr;
break;
case USB_DTYPE_CONFIGURATION:
desc = usb_if_cur->cfg_descr;
len = ((struct usb_string_descriptor*)(usb_if_cur->cfg_descr))->wString[0];
break;
case USB_DTYPE_STRING:
if(dnumber == UsbDevLang) {
desc = &dev_lang_desc;
} else if((dnumber == UsbDevManuf) && (usb_if_cur->str_manuf_descr != NULL)) {
desc = usb_if_cur->str_manuf_descr;
} else if((dnumber == UsbDevProduct) && (usb_if_cur->str_prod_descr != NULL)) {
desc = usb_if_cur->str_prod_descr;
} else if((dnumber == UsbDevSerial) && (usb_if_cur->str_serial_descr != NULL)) {
desc = usb_if_cur->str_serial_descr;
} else
return usbd_fail;
break;
default:
return usbd_fail;
}
if(desc == NULL) return usbd_fail;
if(len == 0) {
len = ((struct usb_header_descriptor*)desc)->bLength;
}
*address = (void*)desc;
*length = len;
return usbd_ack;
}
void furi_hal_usb_set_state_callback(FuriHalUsbStateCallback cb, void* ctx) {
callback = cb;
cb_ctx = ctx;
}
static void reset_evt(usbd_device* dev, uint8_t event, uint8_t ep) {
if(callback != NULL) {
callback(FuriHalUsbStateEventReset, cb_ctx);
}
}
static void susp_evt(usbd_device* dev, uint8_t event, uint8_t ep) {
if((usb_if_cur != NULL) && (usb_config.connected == true)) {
usb_config.connected = false;
usb_if_cur->suspend(&udev);
furi_hal_power_insomnia_exit();
}
if(callback != NULL) {
callback(FuriHalUsbStateEventSuspend, cb_ctx);
}
}
static void wkup_evt(usbd_device* dev, uint8_t event, uint8_t ep) {
if((usb_if_cur != NULL) && (usb_config.connected == false)) {
usb_config.connected = true;
usb_if_cur->wakeup(&udev);
furi_hal_power_insomnia_enter();
}
if(callback != NULL) {
callback(FuriHalUsbStateEventWakeup, cb_ctx);
}
}
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