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376 lines
12 KiB
376 lines
12 KiB
/*
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Copyright (C) 2021 Westberry Technology (ChangZhou) Corp., Ltd
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "util.h"
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#include "wait.h"
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#include "debug.h"
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#include "timer.h"
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#include "flash_spi.h"
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#include "spi_master.h"
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/*
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The time-out time of spi flash transmission.
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*/
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#ifndef EXTERNAL_FLASH_SPI_TIMEOUT
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# define EXTERNAL_FLASH_SPI_TIMEOUT 1000
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#endif
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/* ID comands */
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#define FLASH_CMD_RDID 0x9F /* RDID (Read Identification) */
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#define FLASH_CMD_RES 0xAB /* RES (Read Electronic ID) */
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#define FLASH_CMD_REMS 0x90 /* REMS (Read Electronic & Device ID) */
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/* register comands */
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#define FLASH_CMD_WRSR 0x01 /* WRSR (Write Status register) */
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#define FLASH_CMD_RDSR 0x05 /* RDSR (Read Status register) */
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/* READ comands */
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#define FLASH_CMD_READ 0x03 /* READ (1 x I/O) */
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#define FLASH_CMD_FASTREAD 0x0B /* FAST READ (Fast read data) */
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#define FLASH_CMD_DREAD 0x3B /* DREAD (1In/2 Out fast read) */
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/* Program comands */
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#define FLASH_CMD_WREN 0x06 /* WREN (Write Enable) */
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#define FLASH_CMD_WRDI 0x04 /* WRDI (Write Disable) */
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#define FLASH_CMD_PP 0x02 /* PP (page program) */
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/* Erase comands */
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#define FLASH_CMD_SE 0x20 /* SE (Sector Erase) */
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#define FLASH_CMD_BE 0xD8 /* BE (Block Erase) */
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#define FLASH_CMD_CE 0x60 /* CE (Chip Erase) hex code: 60 or C7 */
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/* Mode setting comands */
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#define FLASH_CMD_DP 0xB9 /* DP (Deep Power Down) */
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#define FLASH_CMD_RDP 0xAB /* RDP (Release form Deep Power Down) */
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/* Status register */
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#define FLASH_FLAG_WIP 0x01 /* Write in progress bit */
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#define FLASH_FLAG_WEL 0x02 /* Write enable latch bit */
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// #define DEBUG_FLASH_SPI_OUTPUT
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static bool spi_flash_start(void) {
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return spi_start(EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN, EXTERNAL_FLASH_SPI_LSBFIRST, EXTERNAL_FLASH_SPI_MODE, EXTERNAL_FLASH_SPI_CLOCK_DIVISOR);
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}
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static flash_status_t spi_flash_wait_while_busy(void) {
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uint32_t deadline = timer_read32() + EXTERNAL_FLASH_SPI_TIMEOUT;
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flash_status_t response = FLASH_STATUS_SUCCESS;
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uint8_t retval;
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do {
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bool res = spi_flash_start();
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if (!res) {
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dprint("Failed to start SPI! [spi flash wait while busy]\n");
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return FLASH_STATUS_ERROR;
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}
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spi_write(FLASH_CMD_RDSR);
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retval = (uint8_t)spi_read();
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spi_stop();
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if (timer_read32() >= deadline) {
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response = FLASH_STATUS_TIMEOUT;
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break;
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}
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} while (retval & FLASH_FLAG_WIP);
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return response;
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}
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static flash_status_t spi_flash_write_enable(void) {
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bool res = spi_flash_start();
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if (!res) {
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dprint("Failed to start SPI! [spi flash write enable]\n");
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return FLASH_STATUS_ERROR;
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}
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spi_write(FLASH_CMD_WREN);
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spi_stop();
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return FLASH_STATUS_SUCCESS;
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}
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static flash_status_t spi_flash_write_disable(void) {
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bool res = spi_flash_start();
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if (!res) {
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dprint("Failed to start SPI! [spi flash write disable]\n");
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return FLASH_STATUS_ERROR;
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}
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spi_write(FLASH_CMD_WRDI);
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spi_stop();
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return FLASH_STATUS_SUCCESS;
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}
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/* This function is used for read transfer, write transfer and erase transfer. */
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static flash_status_t spi_flash_transaction(uint8_t cmd, uint32_t addr, uint8_t *data, size_t len) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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uint8_t buffer[EXTERNAL_FLASH_ADDRESS_SIZE + 1];
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buffer[0] = cmd;
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for (int i = 0; i < EXTERNAL_FLASH_ADDRESS_SIZE; ++i) {
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buffer[EXTERNAL_FLASH_ADDRESS_SIZE - i] = addr & 0xFF;
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addr >>= 8;
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}
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bool res = spi_flash_start();
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if (!res) {
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dprint("Failed to start SPI! [spi flash transmit]\n");
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return FLASH_STATUS_ERROR;
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}
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response = spi_transmit(buffer, sizeof(buffer));
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if ((!response) && (data != NULL)) {
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switch (cmd) {
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case FLASH_CMD_READ:
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response = spi_receive(data, len);
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break;
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case FLASH_CMD_PP:
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response = spi_transmit(data, len);
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break;
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default:
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response = FLASH_STATUS_ERROR;
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break;
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}
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}
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spi_stop();
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return response;
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}
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void flash_init(void) {
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spi_init();
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}
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flash_status_t flash_erase_chip(void) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase chip]\n");
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return response;
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}
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/* Enable writes. */
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response = spi_flash_write_enable();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write-enable! [spi flash erase chip]\n");
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return response;
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}
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/* Erase Chip. */
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bool res = spi_flash_start();
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if (!res) {
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dprint("Failed to start SPI! [spi flash erase chip]\n");
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return FLASH_STATUS_ERROR;
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}
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spi_write(FLASH_CMD_CE);
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spi_stop();
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/* Wait for the write-in-progress bit to be cleared.*/
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase chip]\n");
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return response;
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}
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return response;
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}
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flash_status_t flash_erase_sector(uint32_t addr) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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/* Check that the address exceeds the limit. */
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if ((addr + (EXTERNAL_FLASH_SECTOR_SIZE)) >= (EXTERNAL_FLASH_SIZE) || ((addr % (EXTERNAL_FLASH_SECTOR_SIZE)) != 0)) {
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dprintf("Flash erase sector address over limit! [addr:0x%x]\n", (uint32_t)addr);
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return FLASH_STATUS_ERROR;
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}
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase sector]\n");
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return response;
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}
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/* Enable writes. */
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response = spi_flash_write_enable();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write-enable! [spi flash erase sector]\n");
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return response;
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}
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/* Erase Sector. */
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response = spi_flash_transaction(FLASH_CMD_SE, addr, NULL, 0);
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to erase sector! [spi flash erase sector]\n");
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return response;
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}
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/* Wait for the write-in-progress bit to be cleared.*/
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase sector]\n");
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return response;
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}
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return response;
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}
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flash_status_t flash_erase_block(uint32_t addr) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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/* Check that the address exceeds the limit. */
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if ((addr + (EXTERNAL_FLASH_BLOCK_SIZE)) >= (EXTERNAL_FLASH_SIZE) || ((addr % (EXTERNAL_FLASH_BLOCK_SIZE)) != 0)) {
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dprintf("Flash erase block address over limit! [addr:0x%x]\n", (uint32_t)addr);
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return FLASH_STATUS_ERROR;
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}
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase block]\n");
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return response;
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}
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/* Enable writes. */
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response = spi_flash_write_enable();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write-enable! [spi flash erase block]\n");
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return response;
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}
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/* Erase Block. */
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response = spi_flash_transaction(FLASH_CMD_BE, addr, NULL, 0);
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to erase block! [spi flash erase block]\n");
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return response;
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}
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/* Wait for the write-in-progress bit to be cleared.*/
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash erase block]\n");
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return response;
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}
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return response;
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}
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flash_status_t flash_read_block(uint32_t addr, void *buf, size_t len) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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uint8_t * read_buf = (uint8_t *)buf;
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash read block]\n");
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memset(read_buf, 0, len);
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return response;
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}
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/* Perform read. */
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response = spi_flash_transaction(FLASH_CMD_READ, addr, read_buf, len);
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to read block! [spi flash read block]\n");
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memset(read_buf, 0, len);
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return response;
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}
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#if defined(CONSOLE_ENABLE) && defined(DEBUG_FLASH_SPI_OUTPUT)
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dprintf("[SPI FLASH R] 0x%08lX: ", addr);
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for (size_t i = 0; i < len; ++i) {
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dprintf(" %02X", (int)(((uint8_t *)read_buf)[i]));
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}
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dprintf("\n");
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#endif // DEBUG_FLASH_SPI_OUTPUT
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return response;
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}
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flash_status_t flash_write_block(uint32_t addr, const void *buf, size_t len) {
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flash_status_t response = FLASH_STATUS_SUCCESS;
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uint8_t * write_buf = (uint8_t *)buf;
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while (len > 0) {
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uint32_t page_offset = addr % EXTERNAL_FLASH_PAGE_SIZE;
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size_t write_length = EXTERNAL_FLASH_PAGE_SIZE - page_offset;
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if (write_length > len) {
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write_length = len;
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}
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash write block]\n");
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return response;
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}
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/* Enable writes. */
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response = spi_flash_write_enable();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write-enable! [spi flash write block]\n");
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return response;
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}
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#if defined(CONSOLE_ENABLE) && defined(DEBUG_FLASH_SPI_OUTPUT)
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dprintf("[SPI FLASH W] 0x%08lX: ", addr);
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for (size_t i = 0; i < write_length; i++) {
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dprintf(" %02X", (int)(uint8_t)(write_buf[i]));
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}
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dprintf("\n");
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#endif // DEBUG_FLASH_SPI_OUTPUT
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/* Perform the write. */
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response = spi_flash_transaction(FLASH_CMD_PP, addr, write_buf, write_length);
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write block! [spi flash write block]\n");
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return response;
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}
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write_buf += write_length;
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addr += write_length;
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len -= write_length;
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}
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/* Wait for the write-in-progress bit to be cleared. */
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response = spi_flash_wait_while_busy();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to check WIP flag! [spi flash write block]\n");
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return response;
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}
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/* Disable writes. */
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response = spi_flash_write_disable();
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if (response != FLASH_STATUS_SUCCESS) {
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dprint("Failed to write-disable! [spi flash write block]\n");
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return response;
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}
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return response;
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}
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