circuitpython/ports/mimxrt/mimxrt_flash.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2021 Damien P. George
* Copyright (c) 2021-2023 Philipp Ebensberger
*
* 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 <string.h>
#include "py/runtime.h"
#include "extmod/vfs.h"
#include "modmimxrt.h"
#include "flash.h"
#include BOARD_FLASH_OPS_HEADER_H
extern flexspi_nor_config_t qspiflash_config;
typedef struct _mimxrt_flash_obj_t {
mp_obj_base_t base;
uint32_t flash_base;
uint32_t flash_size;
} mimxrt_flash_obj_t;
STATIC mimxrt_flash_obj_t mimxrt_flash_obj = {
.base = { &mimxrt_flash_type }
};
STATIC mp_obj_t mimxrt_flash_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
// Check args.
mp_arg_check_num(n_args, n_kw, 0, 0, false);
flash_init();
// Update information based on linker symbols.
mimxrt_flash_obj.flash_base = MICROPY_HW_FLASH_STORAGE_BASE;
mimxrt_flash_obj.flash_size = MICROPY_HW_FLASH_STORAGE_BYTES;
// Return singleton object.
return MP_OBJ_FROM_PTR(&mimxrt_flash_obj);
}
// readblocks(block_num, buf, [offset])
// read size of buffer number of bytes from block (with offset) into buffer
STATIC mp_obj_t mimxrt_flash_readblocks(size_t n_args, const mp_obj_t *args) {
mimxrt_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_WRITE);
// Calculate read offset from block number.
uint32_t offset = mp_obj_get_int(args[1]) * SECTOR_SIZE_BYTES;
// Add optional offset
if (n_args == 4) {
offset += mp_obj_get_int(args[3]);
}
flash_read_block((self->flash_base + offset), (uint8_t *)bufinfo.buf, (uint32_t)bufinfo.len);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mimxrt_flash_readblocks_obj, 3, 4, mimxrt_flash_readblocks);
// writeblocks(block_num, buf, [offset])
// Erase block based on block_num and write buffer size number of bytes from buffer into block. If additional offset
// parameter is provided only write operation at block start + offset will be performed.
// This requires a prior erase operation of the block!
STATIC mp_obj_t mimxrt_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
status_t status;
mimxrt_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
// Calculate read offset from block number.
uint32_t offset = mp_obj_get_int(args[1]) * SECTOR_SIZE_BYTES;
if (n_args == 3) {
status = flash_erase_sector(self->flash_base + offset);
if (status != kStatus_Success) {
mp_raise_msg_varg(&mp_type_OSError, MP_ERROR_TEXT("flash erase command failed with %d"), status);
}
} else {
// Add optional offset
offset += mp_obj_get_int(args[3]);
}
status = flash_write_block(self->flash_base + offset, bufinfo.buf, bufinfo.len);
if (status != kStatus_Success) {
mp_raise_msg_varg(&mp_type_OSError, MP_ERROR_TEXT("flash block write command failed with %d"), status);
}
return MP_OBJ_NEW_SMALL_INT(status != kStatus_Success);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mimxrt_flash_writeblocks_obj, 3, 4, mimxrt_flash_writeblocks);
// ioctl(op, arg)
STATIC mp_obj_t mimxrt_flash_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_in) {
mimxrt_flash_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t cmd = mp_obj_get_int(cmd_in);
status_t status;
switch (cmd) {
case MP_BLOCKDEV_IOCTL_INIT:
return MP_OBJ_NEW_SMALL_INT(0);
case MP_BLOCKDEV_IOCTL_DEINIT:
return MP_OBJ_NEW_SMALL_INT(0);
case MP_BLOCKDEV_IOCTL_SYNC:
return MP_OBJ_NEW_SMALL_INT(0);
case MP_BLOCKDEV_IOCTL_BLOCK_COUNT:
return MP_OBJ_NEW_SMALL_INT(self->flash_size / SECTOR_SIZE_BYTES);
case MP_BLOCKDEV_IOCTL_BLOCK_SIZE:
return MP_OBJ_NEW_SMALL_INT(SECTOR_SIZE_BYTES);
case MP_BLOCKDEV_IOCTL_BLOCK_ERASE: {
uint32_t offset = mp_obj_get_int(arg_in) * SECTOR_SIZE_BYTES;
status = flash_erase_sector(self->flash_base + offset);
return MP_OBJ_NEW_SMALL_INT(status != kStatus_Success);
}
default:
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mimxrt_flash_ioctl_obj, mimxrt_flash_ioctl);
STATIC const mp_rom_map_elem_t mimxrt_flash_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&mimxrt_flash_readblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&mimxrt_flash_writeblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&mimxrt_flash_ioctl_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mimxrt_flash_locals_dict, mimxrt_flash_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
mimxrt_flash_type,
MP_QSTR_Flash,
MP_TYPE_FLAG_NONE,
make_new, mimxrt_flash_make_new,
locals_dict, &mimxrt_flash_locals_dict
);