655 lines
24 KiB
C
655 lines
24 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016, 2017 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "external_flash.h"
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#include <stdint.h>
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#include <string.h>
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#include "external_flash/spi_flash_api.h"
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#include "external_flash/common_commands.h"
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#include "extmod/vfs.h"
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#include "extmod/vfs_fat.h"
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#include "py/misc.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "lib/oofatfs/ff.h"
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#include "peripherals.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "supervisor/shared/rgb_led_status.h"
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//#include "shared_dma.h"
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#include "hal_gpio.h"
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#include "hal_spi_m_sync.h"
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#define SPI_FLASH_PART1_START_BLOCK (0x1)
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#define NO_SECTOR_LOADED 0xFFFFFFFF
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struct spi_m_sync_descriptor spi_flash_desc;
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// The currently cached sector in the cache, ram or flash based.
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static uint32_t current_sector;
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const external_flash_device possible_devices[EXTERNAL_FLASH_DEVICE_COUNT] = {EXTERNAL_FLASH_DEVICES};
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static const external_flash_device* flash_device = NULL;
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// Track which blocks (up to 32) in the current sector currently live in the
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// cache.
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static uint32_t dirty_mask;
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// Wait until both the write enable and write in progress bits have cleared.
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static bool wait_for_flash_ready(void) {
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uint8_t read_status_response[1] = {0x00};
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bool ok = true;
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// Both the write enable and write in progress bits should be low.
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do {
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ok = spi_flash_read_command(CMD_READ_STATUS, read_status_response, 1);
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} while (ok && (read_status_response[0] & 0x3) != 0);
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return ok;
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}
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// Turn on the write enable bit so we can program and erase the flash.
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static bool write_enable(void) {
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return spi_flash_command(CMD_ENABLE_WRITE);
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}
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// Read data_length's worth of bytes starting at address into data.
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static bool read_flash(uint32_t address, uint8_t* data, uint32_t data_length) {
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if (flash_device == NULL) {
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return false;
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}
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if (!wait_for_flash_ready()) {
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return false;
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}
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return spi_flash_read_data(address, data, data_length);
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}
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// Writes data_length's worth of bytes starting at address from data. Assumes
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// that the sector that address resides in has already been erased. So make sure
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// to run erase_sector.
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static bool write_flash(uint32_t address, const uint8_t* data, uint32_t data_length) {
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if (flash_device == NULL) {
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return false;
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}
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// Don't bother writing if the data is all 1s. Thats equivalent to the flash
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// state after an erase.
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bool all_ones = true;
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for (uint16_t i = 0; i < data_length; i++) {
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if (data[i] != 0xff) {
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all_ones = false;
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break;
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}
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}
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if (all_ones) {
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return true;
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}
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for (uint32_t bytes_written = 0;
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bytes_written < data_length;
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bytes_written += SPI_FLASH_PAGE_SIZE) {
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if (!wait_for_flash_ready() || !write_enable()) {
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return false;
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}
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if (!spi_flash_write_data(address + bytes_written, (uint8_t*) data + bytes_written,
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SPI_FLASH_PAGE_SIZE)) {
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return false;
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}
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}
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return true;
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}
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static bool page_erased(uint32_t sector_address) {
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// Check the first few bytes to catch the common case where there is data
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// without using a bunch of memory.
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uint8_t short_buffer[4];
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if (read_flash(sector_address, short_buffer, 4)) {
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for (uint16_t i = 0; i < 4; i++) {
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if (short_buffer[i] != 0xff) {
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return false;
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}
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}
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} else {
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return false;
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}
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// Now check the full length.
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uint8_t full_buffer[FILESYSTEM_BLOCK_SIZE];
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if (read_flash(sector_address, full_buffer, FILESYSTEM_BLOCK_SIZE)) {
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for (uint16_t i = 0; i < FILESYSTEM_BLOCK_SIZE; i++) {
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if (short_buffer[i] != 0xff) {
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return false;
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}
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}
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} else {
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return false;
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}
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return true;
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}
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// Erases the given sector. Make sure you copied all of the data out of it you
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// need! Also note, sector_address is really 24 bits.
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static bool erase_sector(uint32_t sector_address) {
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// Before we erase the sector we need to wait for any writes to finish and
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// and then enable the write again.
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if (!wait_for_flash_ready() || !write_enable()) {
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return false;
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}
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spi_flash_sector_command(CMD_SECTOR_ERASE, sector_address);
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return true;
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}
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// Sector is really 24 bits.
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static bool copy_block(uint32_t src_address, uint32_t dest_address) {
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// Copy page by page to minimize RAM buffer.
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uint16_t page_size = SPI_FLASH_PAGE_SIZE;
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uint8_t buffer[page_size];
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for (uint32_t i = 0; i < FILESYSTEM_BLOCK_SIZE / page_size; i++) {
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if (!read_flash(src_address + i * page_size, buffer, page_size)) {
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return false;
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}
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if (!write_flash(dest_address + i * page_size, buffer, page_size)) {
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return false;
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}
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}
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return true;
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}
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void external_flash_init(void) {
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if (flash_device != NULL) {
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return;
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}
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uint8_t num_possible_devices = sizeof(*possible_devices) / sizeof(external_flash_device);
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// Delay to give the SPI Flash time to get going.
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// TODO(tannewt): Only do this when we know power was applied vs a reset.
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uint16_t max_start_up_delay_us = 0;
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for (uint8_t i = 0; i < num_possible_devices; i++) {
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if (possible_devices[i].start_up_time_us > max_start_up_delay_us) {
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max_start_up_delay_us = possible_devices[i].start_up_time_us;
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}
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}
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common_hal_mcu_delay_us(max_start_up_delay_us);
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spi_flash_init();
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for (uint8_t i = 0; i < num_possible_devices; i++) {
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const external_flash_device* possible_device = &possible_devices[i];
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uint8_t jedec_id_response[3] = {0x00, 0x00, 0x00};
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spi_flash_read_command(CMD_READ_JEDEC_ID, jedec_id_response, 3);
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if (jedec_id_response[0] == possible_device->manufacturer_id &&
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jedec_id_response[1] == possible_device->memory_type &&
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jedec_id_response[2] == possible_device->capacity) {
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flash_device = possible_device;
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break;
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}
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}
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if (flash_device == NULL) {
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return;
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}
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// Activity LED for flash writes.
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#ifdef MICROPY_HW_LED_MSC
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gpio_set_pin_function(SPI_FLASH_CS_PIN, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_direction(MICROPY_HW_LED_MSC, GPIO_DIRECTION_OUT);
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// There's already a pull-up on the board.
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gpio_set_pin_level(MICROPY_HW_LED_MSC, false);
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#endif
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if (flash_device->has_sector_protection) {
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write_enable();
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// Turn off sector protection
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uint8_t data[1] = {0x00};
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spi_flash_write_command(CMD_WRITE_STATUS_BYTE1, data, 1);
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}
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// Turn off writes in case this is a microcontroller only reset.
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spi_flash_command(CMD_DISABLE_WRITE);
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wait_for_flash_ready();
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current_sector = NO_SECTOR_LOADED;
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dirty_mask = 0;
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MP_STATE_VM(flash_ram_cache) = NULL;
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}
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// The size of each individual block.
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uint32_t external_flash_get_block_size(void) {
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return FILESYSTEM_BLOCK_SIZE;
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}
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// The total number of available blocks.
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uint32_t external_flash_get_block_count(void) {
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// We subtract one erase sector size because we may use it as a staging area
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// for writes.
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return SPI_FLASH_PART1_START_BLOCK + (flash_device->total_size - SPI_FLASH_ERASE_SIZE) / FILESYSTEM_BLOCK_SIZE;
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}
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// Flush the cache that was written to the scratch portion of flash. Only used
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// when ram is tight.
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static bool flush_scratch_flash(void) {
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// First, copy out any blocks that we haven't touched from the sector we've
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// cached.
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bool copy_to_scratch_ok = true;
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uint32_t scratch_sector = flash_device->total_size - SPI_FLASH_ERASE_SIZE;
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for (uint8_t i = 0; i < SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE; i++) {
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if ((dirty_mask & (1 << i)) == 0) {
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copy_to_scratch_ok = copy_to_scratch_ok &&
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copy_block(current_sector + i * FILESYSTEM_BLOCK_SIZE,
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scratch_sector + i * FILESYSTEM_BLOCK_SIZE);
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}
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}
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if (!copy_to_scratch_ok) {
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// TODO(tannewt): Do more here. We opted to not erase and copy bad data
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// in. We still risk losing the data written to the scratch sector.
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return false;
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}
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// Second, erase the current sector.
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erase_sector(current_sector);
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// Finally, copy the new version into it.
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for (uint8_t i = 0; i < SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE; i++) {
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copy_block(scratch_sector + i * FILESYSTEM_BLOCK_SIZE,
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current_sector + i * FILESYSTEM_BLOCK_SIZE);
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}
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return true;
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}
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// Attempts to allocate a new set of page buffers for caching a full sector in
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// ram. Each page is allocated separately so that the GC doesn't need to provide
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// one huge block. We can free it as we write if we want to also.
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static bool allocate_ram_cache(void) {
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uint8_t blocks_per_sector = SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE;
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uint8_t pages_per_block = FILESYSTEM_BLOCK_SIZE / SPI_FLASH_PAGE_SIZE;
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MP_STATE_VM(flash_ram_cache) = m_malloc_maybe(blocks_per_sector * pages_per_block * sizeof(uint32_t), false);
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if (MP_STATE_VM(flash_ram_cache) == NULL) {
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return false;
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}
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// Declare i and j outside the loops in case we fail to allocate everything
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// we need. In that case we'll give it back.
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uint8_t i = 0;
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uint8_t j = 0;
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bool success = true;
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for (i = 0; i < blocks_per_sector; i++) {
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for (j = 0; j < pages_per_block; j++) {
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uint8_t *page_cache = m_malloc_maybe(SPI_FLASH_PAGE_SIZE, false);
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if (page_cache == NULL) {
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success = false;
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break;
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}
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MP_STATE_VM(flash_ram_cache)[i * pages_per_block + j] = page_cache;
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}
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if (!success) {
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break;
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}
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}
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// We couldn't allocate enough so give back what we got.
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if (!success) {
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// We add 1 so that we delete 0 when i is 1. Going to zero (i >= 0)
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// would never stop because i is unsigned.
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i++;
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for (; i > 0; i--) {
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for (; j > 0; j--) {
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m_free(MP_STATE_VM(flash_ram_cache)[(i - 1) * pages_per_block + (j - 1)]);
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}
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j = pages_per_block;
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}
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m_free(MP_STATE_VM(flash_ram_cache));
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MP_STATE_VM(flash_ram_cache) = NULL;
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}
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return success;
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}
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// Flush the cached sector from ram onto the flash. We'll free the cache unless
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// keep_cache is true.
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static bool flush_ram_cache(bool keep_cache) {
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// First, copy out any blocks that we haven't touched from the sector
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// we've cached. If we don't do this we'll erase the data during the sector
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// erase below.
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bool copy_to_ram_ok = true;
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uint8_t pages_per_block = FILESYSTEM_BLOCK_SIZE / SPI_FLASH_PAGE_SIZE;
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for (uint8_t i = 0; i < SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE; i++) {
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if ((dirty_mask & (1 << i)) == 0) {
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for (uint8_t j = 0; j < pages_per_block; j++) {
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copy_to_ram_ok = read_flash(
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current_sector + (i * pages_per_block + j) * SPI_FLASH_PAGE_SIZE,
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MP_STATE_VM(flash_ram_cache)[i * pages_per_block + j],
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SPI_FLASH_PAGE_SIZE);
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if (!copy_to_ram_ok) {
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break;
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}
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}
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}
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if (!copy_to_ram_ok) {
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break;
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}
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}
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if (!copy_to_ram_ok) {
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return false;
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}
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// Second, erase the current sector.
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erase_sector(current_sector);
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// Lastly, write all the data in ram that we've cached.
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for (uint8_t i = 0; i < SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE; i++) {
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for (uint8_t j = 0; j < pages_per_block; j++) {
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write_flash(current_sector + (i * pages_per_block + j) * SPI_FLASH_PAGE_SIZE,
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MP_STATE_VM(flash_ram_cache)[i * pages_per_block + j],
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SPI_FLASH_PAGE_SIZE);
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if (!keep_cache) {
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m_free(MP_STATE_VM(flash_ram_cache)[i * pages_per_block + j]);
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}
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}
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}
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// We're done with the cache for now so give it back.
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if (!keep_cache) {
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m_free(MP_STATE_VM(flash_ram_cache));
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MP_STATE_VM(flash_ram_cache) = NULL;
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}
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return true;
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}
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// Delegates to the correct flash flush method depending on the existing cache.
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static void spi_flash_flush_keep_cache(bool keep_cache) {
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if (current_sector == NO_SECTOR_LOADED) {
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return;
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}
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#ifdef MICROPY_HW_LED_MSC
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port_pin_set_output_level(MICROPY_HW_LED_MSC, true);
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#endif
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temp_status_color(ACTIVE_WRITE);
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// If we've cached to the flash itself flush from there.
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if (MP_STATE_VM(flash_ram_cache) == NULL) {
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flush_scratch_flash();
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} else {
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flush_ram_cache(keep_cache);
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}
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current_sector = NO_SECTOR_LOADED;
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clear_temp_status();
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#ifdef MICROPY_HW_LED_MSC
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port_pin_set_output_level(MICROPY_HW_LED_MSC, false);
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#endif
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}
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// External flash function used. If called externally we assume we won't need
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// the cache after.
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void external_flash_flush(void) {
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spi_flash_flush_keep_cache(false);
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}
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void flash_flush(void) {
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external_flash_flush();
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}
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// Builds a partition entry for the MBR.
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static void build_partition(uint8_t *buf, int boot, int type,
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uint32_t start_block, uint32_t num_blocks) {
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buf[0] = boot;
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if (num_blocks == 0) {
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buf[1] = 0;
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buf[2] = 0;
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buf[3] = 0;
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} else {
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buf[1] = 0xff;
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buf[2] = 0xff;
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buf[3] = 0xff;
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}
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buf[4] = type;
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if (num_blocks == 0) {
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buf[5] = 0;
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buf[6] = 0;
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buf[7] = 0;
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} else {
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buf[5] = 0xff;
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buf[6] = 0xff;
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buf[7] = 0xff;
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}
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buf[8] = start_block;
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buf[9] = start_block >> 8;
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buf[10] = start_block >> 16;
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buf[11] = start_block >> 24;
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buf[12] = num_blocks;
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buf[13] = num_blocks >> 8;
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buf[14] = num_blocks >> 16;
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buf[15] = num_blocks >> 24;
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}
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static int32_t convert_block_to_flash_addr(uint32_t block) {
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if (SPI_FLASH_PART1_START_BLOCK <= block && block < external_flash_get_block_count()) {
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// a block in partition 1
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block -= SPI_FLASH_PART1_START_BLOCK;
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return block * FILESYSTEM_BLOCK_SIZE;
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}
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// bad block
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return -1;
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}
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bool external_flash_read_block(uint8_t *dest, uint32_t block) {
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if (block == 0) {
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// Fake the MBR so we can decide on our own partition table
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for (int i = 0; i < 446; i++) {
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dest[i] = 0;
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}
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build_partition(dest + 446, 0, 0x01 /* FAT12 */,
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SPI_FLASH_PART1_START_BLOCK,
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external_flash_get_block_count() - SPI_FLASH_PART1_START_BLOCK);
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build_partition(dest + 462, 0, 0, 0, 0);
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build_partition(dest + 478, 0, 0, 0, 0);
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build_partition(dest + 494, 0, 0, 0, 0);
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dest[510] = 0x55;
|
|
dest[511] = 0xaa;
|
|
|
|
return true;
|
|
} else if (block < SPI_FLASH_PART1_START_BLOCK) {
|
|
memset(dest, 0, FILESYSTEM_BLOCK_SIZE);
|
|
return true;
|
|
} else {
|
|
// Non-MBR block, get data from flash memory.
|
|
int32_t address = convert_block_to_flash_addr(block);
|
|
if (address == -1) {
|
|
// bad block number
|
|
return false;
|
|
}
|
|
|
|
// Mask out the lower bits that designate the address within the sector.
|
|
uint32_t this_sector = address & (~(SPI_FLASH_ERASE_SIZE - 1));
|
|
uint8_t block_index = (address / FILESYSTEM_BLOCK_SIZE) % (SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE);
|
|
uint8_t mask = 1 << (block_index);
|
|
// We're reading from the currently cached sector.
|
|
if (current_sector == this_sector && (mask & dirty_mask) > 0) {
|
|
if (MP_STATE_VM(flash_ram_cache) != NULL) {
|
|
uint8_t pages_per_block = FILESYSTEM_BLOCK_SIZE / SPI_FLASH_PAGE_SIZE;
|
|
for (int i = 0; i < pages_per_block; i++) {
|
|
memcpy(dest + i * SPI_FLASH_PAGE_SIZE,
|
|
MP_STATE_VM(flash_ram_cache)[block_index * pages_per_block + i],
|
|
SPI_FLASH_PAGE_SIZE);
|
|
}
|
|
return true;
|
|
} else {
|
|
uint32_t scratch_address = flash_device->total_size - SPI_FLASH_ERASE_SIZE + block_index * FILESYSTEM_BLOCK_SIZE;
|
|
return read_flash(scratch_address, dest, FILESYSTEM_BLOCK_SIZE);
|
|
}
|
|
}
|
|
return read_flash(address, dest, FILESYSTEM_BLOCK_SIZE);
|
|
}
|
|
}
|
|
|
|
bool external_flash_write_block(const uint8_t *data, uint32_t block) {
|
|
if (block < SPI_FLASH_PART1_START_BLOCK) {
|
|
// Fake writing below the flash partition.
|
|
return true;
|
|
} else {
|
|
// Non-MBR block, copy to cache
|
|
int32_t address = convert_block_to_flash_addr(block);
|
|
if (address == -1) {
|
|
// bad block number
|
|
return false;
|
|
}
|
|
// Wait for any previous writes to finish.
|
|
wait_for_flash_ready();
|
|
// Mask out the lower bits that designate the address within the sector.
|
|
uint32_t this_sector = address & (~(SPI_FLASH_ERASE_SIZE - 1));
|
|
uint8_t block_index = (address / FILESYSTEM_BLOCK_SIZE) % (SPI_FLASH_ERASE_SIZE / FILESYSTEM_BLOCK_SIZE);
|
|
uint8_t mask = 1 << (block_index);
|
|
// Flush the cache if we're moving onto a sector or we're writing the
|
|
// same block again.
|
|
if (current_sector != this_sector || (mask & dirty_mask) > 0) {
|
|
// Check to see if we'd write to an erased page. In that case we
|
|
// can write directly.
|
|
if (page_erased(address)) {
|
|
return write_flash(address, data, FILESYSTEM_BLOCK_SIZE);
|
|
}
|
|
if (current_sector != NO_SECTOR_LOADED) {
|
|
spi_flash_flush_keep_cache(true);
|
|
}
|
|
if (MP_STATE_VM(flash_ram_cache) == NULL && !allocate_ram_cache()) {
|
|
erase_sector(flash_device->total_size - SPI_FLASH_ERASE_SIZE);
|
|
wait_for_flash_ready();
|
|
}
|
|
current_sector = this_sector;
|
|
dirty_mask = 0;
|
|
}
|
|
dirty_mask |= mask;
|
|
// Copy the block to the appropriate cache.
|
|
if (MP_STATE_VM(flash_ram_cache) != NULL) {
|
|
uint8_t pages_per_block = FILESYSTEM_BLOCK_SIZE / SPI_FLASH_PAGE_SIZE;
|
|
for (int i = 0; i < pages_per_block; i++) {
|
|
memcpy(MP_STATE_VM(flash_ram_cache)[block_index * pages_per_block + i],
|
|
data + i * SPI_FLASH_PAGE_SIZE,
|
|
SPI_FLASH_PAGE_SIZE);
|
|
}
|
|
return true;
|
|
} else {
|
|
uint32_t scratch_address = flash_device->total_size - SPI_FLASH_ERASE_SIZE + block_index * FILESYSTEM_BLOCK_SIZE;
|
|
return write_flash(scratch_address, data, FILESYSTEM_BLOCK_SIZE);
|
|
}
|
|
}
|
|
}
|
|
|
|
mp_uint_t external_flash_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
if (!external_flash_read_block(dest + i * FILESYSTEM_BLOCK_SIZE, block_num + i)) {
|
|
return 1; // error
|
|
}
|
|
}
|
|
return 0; // success
|
|
}
|
|
|
|
mp_uint_t external_flash_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
if (!external_flash_write_block(src + i * FILESYSTEM_BLOCK_SIZE, block_num + i)) {
|
|
return 1; // error
|
|
}
|
|
}
|
|
return 0; // success
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// MicroPython bindings
|
|
//
|
|
// Expose the flash as an object with the block protocol.
|
|
|
|
// there is a singleton Flash object
|
|
STATIC const mp_obj_base_t external_flash_obj = {&external_flash_type};
|
|
|
|
STATIC mp_obj_t external_flash_obj_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
// check arguments
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
|
|
// return singleton object
|
|
return (mp_obj_t)&external_flash_obj;
|
|
}
|
|
|
|
STATIC mp_obj_t external_flash_obj_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
|
|
mp_uint_t ret = external_flash_read_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FILESYSTEM_BLOCK_SIZE);
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(external_flash_obj_readblocks_obj, external_flash_obj_readblocks);
|
|
|
|
STATIC mp_obj_t external_flash_obj_writeblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
|
|
mp_uint_t ret = external_flash_write_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FILESYSTEM_BLOCK_SIZE);
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(external_flash_obj_writeblocks_obj, external_flash_obj_writeblocks);
|
|
|
|
STATIC mp_obj_t external_flash_obj_ioctl(mp_obj_t self, mp_obj_t cmd_in, mp_obj_t arg_in) {
|
|
mp_int_t cmd = mp_obj_get_int(cmd_in);
|
|
switch (cmd) {
|
|
case BP_IOCTL_INIT: external_flash_init(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
case BP_IOCTL_DEINIT: external_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0); // TODO properly
|
|
case BP_IOCTL_SYNC: external_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
case BP_IOCTL_SEC_COUNT: return MP_OBJ_NEW_SMALL_INT(external_flash_get_block_count());
|
|
case BP_IOCTL_SEC_SIZE: return MP_OBJ_NEW_SMALL_INT(external_flash_get_block_size());
|
|
default: return mp_const_none;
|
|
}
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(external_flash_obj_ioctl_obj, external_flash_obj_ioctl);
|
|
|
|
STATIC const mp_rom_map_elem_t external_flash_obj_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&external_flash_obj_readblocks_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&external_flash_obj_writeblocks_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&external_flash_obj_ioctl_obj) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(external_flash_obj_locals_dict, external_flash_obj_locals_dict_table);
|
|
|
|
const mp_obj_type_t external_flash_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_SPIFlash,
|
|
.make_new = external_flash_obj_make_new,
|
|
.locals_dict = (mp_obj_t)&external_flash_obj_locals_dict,
|
|
};
|
|
|
|
void flash_init_vfs(fs_user_mount_t *vfs) {
|
|
vfs->base.type = &mp_fat_vfs_type;
|
|
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
|
|
vfs->fatfs.drv = vfs;
|
|
vfs->fatfs.part = 1; // flash filesystem lives on first partition
|
|
vfs->readblocks[0] = (mp_obj_t)&external_flash_obj_readblocks_obj;
|
|
vfs->readblocks[1] = (mp_obj_t)&external_flash_obj;
|
|
vfs->readblocks[2] = (mp_obj_t)external_flash_read_blocks; // native version
|
|
vfs->writeblocks[0] = (mp_obj_t)&external_flash_obj_writeblocks_obj;
|
|
vfs->writeblocks[1] = (mp_obj_t)&external_flash_obj;
|
|
vfs->writeblocks[2] = (mp_obj_t)external_flash_write_blocks; // native version
|
|
vfs->u.ioctl[0] = (mp_obj_t)&external_flash_obj_ioctl_obj;
|
|
vfs->u.ioctl[1] = (mp_obj_t)&external_flash_obj;
|
|
}
|