usbStorage.c

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/*
 * Copyright (C) 2014-2015 Gautier Hattenberger, Alexandre Bustico
 *
 * This file is part of paparazzi.
 *
 * paparazzi is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * paparazzi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with paparazzi; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
/*
 * @file modules/loggers/sdlog_chibios/usbStorage.c
 *
 */
 
#include <ch.h>
#include <hal.h>
#include "usb_msd.h"
#include "usbStorage.h"
#include "modules/loggers/sdlog_chibios.h"
#include <stdio.h>
#include <string.h>
#include "main_chibios.h"
#include "mcu.h"
#include "mcu_periph/sdio.h"
#include "led.h"
 
/* Default disable USB on boot enable */
#ifndef SDLOG_USB_VBUS_BOOT
#define SDLOG_USB_VBUS_BOOT  false
#endif
 
static void thdUsbStorage(void *arg);
static thread_t *usbStorageThreadPtr = NULL;
/* USB mass storage driver */
static bool isRunning = false;
float usb_storage_status = 0;
static BSEMAPHORE_DECL(bs_start_msd, true);
 
/* Turns on a LED when there is I/O activity on the USB port */
static void usbActivity(bool active __attribute__((unused)))
{
#ifdef SDLOG_USB_LED
  if (active) {
    LED_ON(SDLOG_USB_LED);
  } else {
    LED_OFF(SDLOG_USB_LED);
  }
#endif
}
 
/* USB mass storage configuration */
static USBMassStorageConfig msdConfig = {
  &USBD1,
  (BaseBlockDevice *) &SDCD1,
  USB_MS_DATA_EP,
  &usbActivity,
  "Pprz_sd",
  "AutoPilot",
  "0.2"
};
 
 
static THD_WORKING_AREA(waThdUsbStorage, 4096);
void usbStorageStartPolling(void)
{
  usbStorageThreadPtr = chThdCreateStatic(waThdUsbStorage, sizeof(waThdUsbStorage),
                                          NORMALPRIO + 2, thdUsbStorage, NULL);
 
}
 
 
void usbStorageWaitForDeconnexion(void)
{
  if (usbStorageThreadPtr != NULL) {
    chThdWait(usbStorageThreadPtr);
  }
  usbStorageThreadPtr = NULL;
}
 
void usbStorageStop(void)
{
  if (usbStorageThreadPtr != NULL) {
    chThdTerminate(usbStorageThreadPtr);
  }
}
 
 
static void thdUsbStorage(void *arg)
{
  (void) arg;
 
  chRegSetThreadName("UsbStorage:polling");
  event_listener_t connected;
 
#if SDLOG_USB_VBUS_BOOT
  // Enable usb power with boot
  if(palReadPad(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN) == PAL_LOW)
#endif
 
  {
#if HAL_USE_SERIAL_USB
    // serial usb is used, so the usb vbus detection can't be used
    chBSemWait(&bs_start_msd);
#else
    palEnablePadEvent(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN, PAL_EVENT_MODE_BOTH_EDGES);
    // wait transition to HIGH with rebound management
    do {
      palWaitPadTimeout(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN, TIME_INFINITE);
      chThdSleepMilliseconds(10);
    } while (palReadPad(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN) == PAL_LOW);
  
#endif
  }
 
  isRunning = true;
  usb_storage_status = 1;
  chRegSetThreadName("UsbStorage:connected");
 
  /* Stop the logs*/
  // it's not a powerloss, wa have time to flush the ram buffer
  sdlog_chibios_finish(true);
 
 
  /* connect sdcard sdc interface sdio */
  if (sdio_connect() == false) {
    chThdExit(MSG_TIMEOUT);
  }
 
  /* initialize the USB mass storage driver */
  init_msd_driver(NULL, &msdConfig);
 
  /* wait for a real usb storage connexion before shutting down autopilot */
  msd_register_evt_connected(&connected, EVENT_MASK(1));
  chEvtWaitOne(EVENT_MASK(1));
 
  /* stop autopilot */
  pprz_terminate_autopilot_threads();
 
  /* wait until usb-storage is unmount and usb cable is unplugged*/
  while (!chThdShouldTerminateX() && palReadPad(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN)) {
    chThdSleepMilliseconds(10);
  }
 
  deinit_msd_driver();
 
  chThdSleepMilliseconds(500);
 
  mcu_reboot(MCU_REBOOT_FAST);
}
 
bool usbStorageIsItRunning(void)
{
  return isRunning;
}
 
/*
 *  Enable USB storage only if USB is plugged.
 */
void usbStorage_enable_usb_storage(float e) {
  if(e > 0.5 && palReadPad(SDLOG_USB_VBUS_PORT, SDLOG_USB_VBUS_PIN) == PAL_HIGH) {
    chBSemSignal(&bs_start_msd);
  } else {
    usb_storage_status = 0;
  }
}