circuitpython/ports/atmel-samd/supervisor/filesystem.c

109 lines
3.7 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "extmod/vfs_fat.h"
#include "lib/oofatfs/ff.h"
#include "lib/oofatfs/diskio.h"
#include "py/mpstate.h"
#include "flash_api.h"
#ifdef EXPRESS_BOARD
// #include "common-hal/touchio/TouchIn.h"
#define INTERNAL_CIRCUITPY_CONFIG_START_ADDR (0x00040000 - 0x100 - CIRCUITPY_INTERNAL_NVM_SIZE)
#else
#define INTERNAL_CIRCUITPY_CONFIG_START_ADDR (0x00040000 - 0x010000 - 0x100 - CIRCUITPY_INTERNAL_NVM_SIZE)
#endif
fs_user_mount_t fs_user_mount_flash;
mp_vfs_mount_t mp_vfs_mount_flash;
static void make_empty_file(FATFS *fatfs, const char *path) {
FIL fp;
f_open(fatfs, &fp, path, FA_WRITE | FA_CREATE_ALWAYS);
f_close(&fp);
}
// we don't make this function static because it needs a lot of stack and we
// want it to be executed without using stack within main() function
void filesystem_init(bool create_allowed, bool force_create) {
// init the vfs object
fs_user_mount_t *vfs_fat = &fs_user_mount_flash;
vfs_fat->flags = 0;
flash_init_vfs(vfs_fat);
// try to mount the flash
FRESULT res = f_mount(&vfs_fat->fatfs);
if ((res == FR_NO_FILESYSTEM && create_allowed) || force_create) {
// No filesystem so create a fresh one, or reformat has been requested.
uint8_t working_buf[_MAX_SS];
res = f_mkfs(&vfs_fat->fatfs, FM_FAT, 0, working_buf, sizeof(working_buf));
// Flush the new file system to make sure it's repaired immediately.
flash_flush();
if (res != FR_OK) {
return;
}
// set label
f_setlabel(&vfs_fat->fatfs, "CIRCUITPY");
// inhibit file indexing on MacOS
f_mkdir(&vfs_fat->fatfs, "/.fseventsd");
make_empty_file(&vfs_fat->fatfs, "/.metadata_never_index");
make_empty_file(&vfs_fat->fatfs, "/.Trashes");
make_empty_file(&vfs_fat->fatfs, "/.fseventsd/no_log");
// and ensure everything is flushed
flash_flush();
} else if (res != FR_OK) {
return;
}
mp_vfs_mount_t *vfs = &mp_vfs_mount_flash;
vfs->str = "/";
vfs->len = 1;
vfs->obj = MP_OBJ_FROM_PTR(vfs_fat);
vfs->next = NULL;
MP_STATE_VM(vfs_mount_table) = vfs;
// The current directory is used as the boot up directory.
// It is set to the internal flash filesystem by default.
MP_STATE_PORT(vfs_cur) = vfs;
}
void filesystem_flush(void) {
flash_flush();
}
void filesystem_writable_by_python(bool writable) {
flash_set_usb_writable(!writable);
}
bool filesystem_present(void) {
return true;
}