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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 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 "flash.h"
void flash_init(void) {
// Upload the custom flash configuration
// And fix the entry for PAGEPROGRAM_QUAD
// Update the flash CLK
flexspi_nor_update_lut_clk(MICROPY_HW_FLASH_CLK);
// Configure FLEXSPI IP FIFO access.
BOARD_FLEX_SPI->MCR0 &= ~(FLEXSPI_MCR0_ARDFEN_MASK);
BOARD_FLEX_SPI->MCR0 &= ~(FLEXSPI_MCR0_ATDFEN_MASK);
BOARD_FLEX_SPI->MCR0 |= FLEXSPI_MCR0_ARDFEN(0);
BOARD_FLEX_SPI->MCR0 |= FLEXSPI_MCR0_ATDFEN(0);
}
// flash_erase_block(erase_addr)
// erases the block starting at addr. Block size according to the flash properties.
__attribute__((section(".ram_functions"))) status_t flash_erase_block(uint32_t erase_addr) {
status_t status = kStatus_Fail;
__disable_irq();
SCB_DisableDCache();
status = flexspi_nor_flash_erase_block(BOARD_FLEX_SPI, erase_addr);
SCB_EnableDCache();
__enable_irq();
return status;
}
// flash_erase_sector(erase_addr_bytes)
// erases the sector starting at addr. Sector size according to the flash properties.
__attribute__((section(".ram_functions"))) status_t flash_erase_sector(uint32_t erase_addr) {
status_t status = kStatus_Fail;
__disable_irq();
SCB_DisableDCache();
status = flexspi_nor_flash_erase_sector(BOARD_FLEX_SPI, erase_addr);
SCB_EnableDCache();
__enable_irq();
return status;
}
// flash_write_block(flash_dest_addr_bytes, data_source, length_bytes)
// writes length_byte data to the destination address
// the vfs driver takes care for erasing the sector if required
__attribute__((section(".ram_functions"))) status_t flash_write_block(uint32_t dest_addr, const uint8_t *src, uint32_t length) {
status_t status = kStatus_Fail;
uint32_t write_length;
uint32_t next_addr;
if (length == 0) {
status = kStatus_Success; // Nothing to do
} else {
// write data in chunks not crossing a page boundary
do {
next_addr = dest_addr - (dest_addr % PAGE_SIZE_BYTES) + PAGE_SIZE_BYTES; // next page boundary
write_length = next_addr - dest_addr; // calculate write length based on destination address and subsequent page boundary.
if (write_length > length) { // compare possible write_length against remaining data length
write_length = length;
}
__disable_irq();
SCB_DisableDCache();
status = flexspi_nor_flash_page_program(BOARD_FLEX_SPI, dest_addr, (uint32_t *)src, write_length);
SCB_EnableDCache();
__enable_irq();
// Update remaining data length
length -= write_length;
// Move source and destination pointer
src += write_length;
dest_addr += write_length;
} while ((length > 0) && (status == kStatus_Success));
}
return status;
}
// flash_read_block(flash_src_addr_bytes, data_dest, length_bytes)
// read length_byte data to the source address
// It is just a shim to provide the same structure for read_block and write_block.
__attribute__((section(".ram_functions"))) void flash_read_block(uint32_t src_addr, uint8_t *dest, uint32_t length) {
memcpy(dest, (const uint8_t *)(BOARD_FLEX_SPI_ADDR_BASE + src_addr), length);
}
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