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spi_eeprom.c
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spi_eeprom.c
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/*
* Copyright (C) 2022 McMCC <mcmcc@mail.ru>
* spi_eeprom.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "timer.h"
#include "spi_eeprom.h"
#include "spi_controller.h"
extern unsigned int bsize;
extern char eepromname[12];
struct spi_eeprom seeprom_info;
int seepromsize = 0;
int spage_size = 0;
static void wait_ready(void)
{
uint8_t data[1];
while (1) {
SPI_CONTROLLER_Chip_Select_Low();
SPI_CONTROLLER_Write_One_Byte(SEEP_RDSR_CMD);
SPI_CONTROLLER_Read_NByte(data, 1, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Chip_Select_High();
if ((data[0] & 0x01) == 0) break;
usleep(1);
}
}
static void write_enable(void)
{
uint8_t data[1];
while (1) {
SPI_CONTROLLER_Chip_Select_Low();
SPI_CONTROLLER_Write_One_Byte(SEEP_WREN_CMD);
SPI_CONTROLLER_Chip_Select_High();
usleep(1);
SPI_CONTROLLER_Chip_Select_Low();
SPI_CONTROLLER_Write_One_Byte(SEEP_RDSR_CMD);
SPI_CONTROLLER_Read_NByte(data, 1, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Chip_Select_High();
if (data[0] == 0x02) break;
usleep(1);
}
}
static void eeprom_write_byte(struct spi_eeprom *dev, uint32_t address, uint8_t data)
{
uint8_t buf[5];
write_enable();
buf[0] = SEEP_WRITE_CMD;
if (dev->addr_bits == 9 && address > 0xFF)
buf[0] = buf[0] | 0x08;
SPI_CONTROLLER_Chip_Select_Low();
if (dev->addr_bits > 16) {
buf[1] = (address & 0xFF0000) >> 16;
buf[2] = (address & 0xFF00) >> 8;
buf[3] = (address & 0xFF);
buf[4] = data;
SPI_CONTROLLER_Write_NByte(buf, 5, SPI_CONTROLLER_SPEED_SINGLE);
} else if (dev->addr_bits < 10) {
buf[1] = (address & 0xFF);
buf[2] = data;
SPI_CONTROLLER_Write_NByte(buf, 3, SPI_CONTROLLER_SPEED_SINGLE);
} else {
buf[1] = (address & 0xFF00) >> 8;
buf[2] = (address & 0xFF);
buf[3] = data;
SPI_CONTROLLER_Write_NByte(buf, 4, SPI_CONTROLLER_SPEED_SINGLE);
}
SPI_CONTROLLER_Chip_Select_High();
wait_ready();
}
static void eeprom_write_page(struct spi_eeprom *dev, uint32_t address, int page_size, uint8_t *data)
{
uint8_t buf[MAX_SEEP_PSIZE];
uint8_t offs = 0;
memset(buf, 0, sizeof(buf));
buf[0] = SEEP_WRITE_CMD;
if (dev->addr_bits == 9 && address > 0xFF)
buf[0] = buf[0] | 0x08;
if (dev->addr_bits > 16) {
buf[1] = (address & 0xFF0000) >> 16;
buf[2] = (address & 0xFF00) >> 8;
buf[3] = (address & 0xFF);
offs = 4;
} else if (dev->addr_bits < 10) {
buf[1] = (address & 0xFF);
offs = 2;
} else {
buf[1] = (address & 0xFF00) >> 8;
buf[2] = (address & 0xFF);
offs = 3;
}
memcpy(&buf[offs], data, page_size);
write_enable();
SPI_CONTROLLER_Chip_Select_Low();
SPI_CONTROLLER_Write_NByte(buf, offs + page_size, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Chip_Select_High();
wait_ready();
}
static uint8_t eeprom_read_byte(struct spi_eeprom *dev, uint32_t address)
{
uint8_t buf[4];
uint8_t data;
buf[0] = SEEP_READ_CMD;
if (dev->addr_bits == 9 && address > 0xFF)
buf[0] = buf[0] | 0x08;
SPI_CONTROLLER_Chip_Select_Low();
if (dev->addr_bits > 16) {
buf[1] = (address & 0xFF0000) >> 16;
buf[2] = (address & 0xFF00) >> 8;
buf[3] = (address & 0xFF);
SPI_CONTROLLER_Write_NByte(buf, 4, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Read_NByte(buf, 1, SPI_CONTROLLER_SPEED_SINGLE);
data = buf[0];
} else if (dev->addr_bits < 10) {
buf[1] = (address & 0xFF);
SPI_CONTROLLER_Write_NByte(buf, 2, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Read_NByte(buf, 1, SPI_CONTROLLER_SPEED_SINGLE);
data = buf[0];
} else {
buf[1] = (address & 0xFF00) >> 8;
buf[2] = (address & 0xFF);
SPI_CONTROLLER_Write_NByte(buf, 3, SPI_CONTROLLER_SPEED_SINGLE);
SPI_CONTROLLER_Read_NByte(buf, 1, SPI_CONTROLLER_SPEED_SINGLE);
data = buf[0];
}
SPI_CONTROLLER_Chip_Select_High();
return data;
}
int32_t parseSEEPsize(char *seepromname, struct spi_eeprom *seeprom)
{
int i;
for (i = 0; seepromlist[i].total_bytes; i++) {
if (strstr(seepromlist[i].name, seepromname)) {
memcpy(seeprom, &(seepromlist[i]), sizeof(struct spi_eeprom));
return (seepromlist[i].total_bytes);
}
}
return -1;
}
int spi_eeprom_read(unsigned char *buf, unsigned long from, unsigned long len)
{
unsigned char *pbuf, ebuf[MAX_SEEP_SIZE];
uint32_t i;
if (len == 0)
return -1;
timer_start();
memset(ebuf, 0, sizeof(ebuf));
pbuf = ebuf;
for (i = 0; i < seepromsize; i++) {
pbuf[i] = eeprom_read_byte(&seeprom_info, i);
if( timer_progress() )
{
printf("\bRead %d%% [%d] of [%d] bytes ", 100 * i / seepromsize, i, seepromsize);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
fflush(stdout);
}
}
memcpy(buf, pbuf + from, len);
printf("Read 100%% [%lu] bytes from [%s] EEPROM address 0x%08lu\n", len, eepromname, from);
timer_end();
return (int)len;
}
int spi_eeprom_erase(unsigned long offs, unsigned long len)
{
unsigned char *pbuf, ebuf[MAX_SEEP_SIZE];
uint32_t i;
if (len == 0)
return -1;
timer_start();
memset(ebuf, 0xff, sizeof(ebuf));
pbuf = ebuf;
if (offs || len < seepromsize) {
for (i = 0; i < seepromsize; i++)
pbuf[i] = eeprom_read_byte(&seeprom_info, i);
memset(pbuf + offs, 0xff, len);
}
for (i = 0; i < seepromsize; i++) {
if (spage_size) {
eeprom_write_page(&seeprom_info, i, spage_size, pbuf + i);
i = (spage_size + i) - 1;
} else
eeprom_write_byte(&seeprom_info, i, pbuf[i]);
if( timer_progress() )
{
printf("\bErase %d%% [%d] of [%d] bytes ", 100 * i / seepromsize, i, seepromsize);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
fflush(stdout);
}
}
printf("Erased 100%% [%lu] bytes of [%s] EEPROM address 0x%08lu\n", len, eepromname, offs);
timer_end();
return 0;
}
int spi_eeprom_write(unsigned char *buf, unsigned long to, unsigned long len)
{
unsigned char *pbuf, ebuf[MAX_SEEP_SIZE];
uint32_t i;
if (len == 0)
return -1;
timer_start();
memset(ebuf, 0xff, sizeof(ebuf));
pbuf = ebuf;
if (to || len < seepromsize) {
for (i = 0; i < seepromsize; i++)
pbuf[i] = eeprom_read_byte(&seeprom_info, i);
}
memcpy(pbuf + to, buf, len);
for (i = 0; i < seepromsize; i++) {
if (spage_size) {
eeprom_write_page(&seeprom_info, i, spage_size, pbuf + i);
i = (spage_size + i) - 1;
} else
eeprom_write_byte(&seeprom_info, i, pbuf[i]);
if( timer_progress() )
{
printf("\bWritten %d%% [%d] of [%d] bytes ", 100 * i / seepromsize, i, seepromsize);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
fflush(stdout);
}
}
printf("Written 100%% [%lu] bytes to [%s] EEPROM address 0x%08lu\n", len, eepromname, to);
timer_end();
return (int)len;
}
long spi_eeprom_init(void)
{
if (seepromsize <= 0) {
printf("SPI EEPROM Not Detected!\n");
return -1;
}
bsize = 1;
printf("SPI EEPROM chip: %s, Size: %d bytes\n", eepromname, seepromsize);
return (long)seepromsize;
}
void support_spi_eeprom_list(void)
{
int i;
printf("SPI EEPROM Support List:\n");
for ( i = 0; i < (sizeof(seepromlist)/sizeof(struct spi_eeprom)); i++)
{
if (!seepromlist[i].total_bytes)
break;
printf("%03d. %s\n", i + 1, seepromlist[i].name);
}
}
/* End of [spi_eeprom.c] package */