258 lines
9.5 KiB
C
258 lines
9.5 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) 2013, 2014 Damien P. George
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* Copyright (c) 2019 Artur Pacholec
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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 "supervisor/flash.h"
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include "extmod/vfs.h"
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#include "extmod/vfs_fat.h"
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#include "py/mphal.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 "fsl_cache.h"
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#include "fsl_flexspi.h"
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#include "fsl_iomuxc.h"
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// defined in linker
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extern uint32_t __fatfs_flash_start_addr[];
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extern uint32_t __fatfs_flash_length[];
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#define NO_CACHE 0xffffffff
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#define SECTOR_SIZE 0x1000 /* 4K */
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uint8_t _flash_cache[SECTOR_SIZE] __attribute__((aligned(4)));
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uint32_t _flash_page_addr = NO_CACHE;
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static bool init_done = false;
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flexspi_device_config_t deviceconfig = {
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.flexspiRootClk = 133000000,
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.flashSize = (BOARD_FLASH_SIZE / 1024),
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.CSIntervalUnit = kFLEXSPI_CsIntervalUnit1SckCycle,
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.CSInterval = 2,
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.CSHoldTime = 3,
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.CSSetupTime = 3,
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.dataValidTime = 0,
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.columnspace = 0,
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.enableWordAddress = 0,
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.AWRSeqIndex = 0,
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.AWRSeqNumber = 0,
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.ARDSeqIndex = NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD,
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.ARDSeqNumber = 1,
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.AHBWriteWaitUnit = kFLEXSPI_AhbWriteWaitUnit2AhbCycle,
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.AHBWriteWaitInterval = 0,
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};
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const uint32_t customLUT[CUSTOM_LUT_LENGTH] = {
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/* Normal read mode -SDR */
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/* Normal read mode -SDR */
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x03, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL + 1] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
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/* Fast read mode - SDR */
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x0B, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST + 1] = FLEXSPI_LUT_SEQ(
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kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_1PAD, 0x08, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
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/* Fast read quad mode - SDR */
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xEB, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_4PAD, 0x18),
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[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD + 1] = FLEXSPI_LUT_SEQ(
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kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_4PAD, 0x06, kFLEXSPI_Command_READ_SDR, kFLEXSPI_4PAD, 0x04),
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/* Read extend parameters */
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[4 * NOR_CMD_LUT_SEQ_IDX_READSTATUS] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x81, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
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/* Write Enable */
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[4 * NOR_CMD_LUT_SEQ_IDX_WRITEENABLE] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x06, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
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/* Erase Sector */
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[4 * NOR_CMD_LUT_SEQ_IDX_ERASESECTOR] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x20, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
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/* Page Program - single mode */
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[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x02, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
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[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE + 1] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
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/* Page Program - quad mode */
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[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x32, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
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[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD + 1] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_4PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
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/* Read ID */
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[4 * NOR_CMD_LUT_SEQ_IDX_READID] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x9F, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
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/* Enable Quad mode */
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[4 * NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x31, kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04),
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/* Read status register */
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[4 * NOR_CMD_LUT_SEQ_IDX_READSTATUSREG] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x05, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
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/* Erase whole chip */
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[4 * NOR_CMD_LUT_SEQ_IDX_ERASECHIP] =
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FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xC7, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
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};
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extern status_t flexspi_nor_flash_erase_sector(FLEXSPI_Type *base, uint32_t address);
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extern status_t flexspi_nor_flash_page_program(FLEXSPI_Type *base, uint32_t dstAddr, const uint32_t *src);
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extern status_t flexspi_nor_get_vendor_id(FLEXSPI_Type *base, uint8_t *vendorId);
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extern status_t flexspi_nor_enable_quad_mode(FLEXSPI_Type *base);
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extern status_t flexspi_nor_erase_chip(FLEXSPI_Type *base);
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extern void flexspi_nor_flash_init(FLEXSPI_Type *base);
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void supervisor_flash_init(void) {
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if (init_done)
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return;
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SCB_DisableDCache();
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status_t status;
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uint8_t vendorID = 0;
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flexspi_nor_flash_init(FLEXSPI);
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/* Get vendor ID. */
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status = flexspi_nor_get_vendor_id(FLEXSPI, &vendorID);
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if (status != kStatus_Success) {
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printf("flexspi_nor_get_vendor_id fail %ld\r\n", status);
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return;
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}
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/* Enter quad mode. */
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__disable_irq();
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status = flexspi_nor_enable_quad_mode(FLEXSPI);
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if (status != kStatus_Success)
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{
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printf("flexspi_nor_enable_quad_mode fail %ld\r\n", status);
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return;
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}
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__enable_irq();
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SCB_EnableDCache();
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init_done = true;
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}
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static inline uint32_t lba2addr(uint32_t block) {
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return CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_START_ADDR + block * FILESYSTEM_BLOCK_SIZE;
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}
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uint32_t supervisor_flash_get_block_size(void) {
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return FILESYSTEM_BLOCK_SIZE;
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}
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uint32_t supervisor_flash_get_block_count(void) {
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return CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE / FILESYSTEM_BLOCK_SIZE;
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}
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void port_internal_flash_flush(void) {
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if (_flash_page_addr == NO_CACHE) return;
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status_t status;
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// Skip if data is the same
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if (memcmp(_flash_cache, (void *)_flash_page_addr, SECTOR_SIZE) != 0) {
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volatile uint32_t sector_addr = (_flash_page_addr - FlexSPI_AMBA_BASE);
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__disable_irq();
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status = flexspi_nor_flash_erase_sector(FLEXSPI, sector_addr);
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__enable_irq();
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if (status != kStatus_Success) {
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printf("Page erase failure %ld!\r\n", status);
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return;
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}
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for (int i = 0; i < SECTOR_SIZE / FLASH_PAGE_SIZE; ++i) {
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__disable_irq();
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status = flexspi_nor_flash_page_program(FLEXSPI, sector_addr + i * FLASH_PAGE_SIZE, (void *)_flash_cache + i * FLASH_PAGE_SIZE);
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__enable_irq();
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if (status != kStatus_Success) {
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printf("Page program failure %ld!\r\n", status);
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return;
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}
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}
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DCACHE_CleanInvalidateByRange(_flash_page_addr, SECTOR_SIZE);
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}
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}
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mp_uint_t supervisor_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t num_blocks) {
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// Must write out anything in cache before trying to read.
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supervisor_flash_flush();
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uint32_t src = lba2addr(block);
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memcpy(dest, (uint8_t*)src, FILESYSTEM_BLOCK_SIZE * num_blocks);
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return 0; // success
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}
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mp_uint_t supervisor_flash_write_blocks(const uint8_t *src, uint32_t lba, uint32_t num_blocks) {
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while (num_blocks) {
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uint32_t const addr = lba2addr(lba);
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uint32_t const page_addr = addr & ~(SECTOR_SIZE - 1);
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uint32_t count = 8 - (lba % 8); // up to page boundary
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count = MIN(num_blocks, count);
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if (page_addr != _flash_page_addr) {
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// Write out anything in cache before overwriting it.
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supervisor_flash_flush();
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_flash_page_addr = page_addr;
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// Copy the current contents of the entire page into the cache.
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memcpy(_flash_cache, (void *)page_addr, SECTOR_SIZE);
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}
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// Overwrite part or all of the page cache with the src data.
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memcpy(_flash_cache + (addr & (SECTOR_SIZE - 1)), src, count * FILESYSTEM_BLOCK_SIZE);
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// adjust for next run
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lba += count;
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src += count * FILESYSTEM_BLOCK_SIZE;
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num_blocks -= count;
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}
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return 0; // success
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}
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void supervisor_flash_release_cache(void) {
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}
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