mirror of
git://projects.qi-hardware.com/f32xbase.git
synced 2024-11-27 19:37:30 +02:00
157 lines
2.6 KiB
C
157 lines
2.6 KiB
C
/*
|
|
* f32x/flash.c - Flash programming and reading
|
|
*
|
|
* Written 2008 by Werner Almesberger
|
|
* Copyright 2008 Werner Almesberger
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
#include "c2.h"
|
|
#include "flash.h"
|
|
|
|
|
|
/* ----- Helper functions for common flash protocol idioms ----------------- */
|
|
|
|
|
|
static uint8_t _c2_addr_read(void)
|
|
{
|
|
uint8_t x;
|
|
|
|
usleep(1000);
|
|
x = c2_addr_read();
|
|
// fprintf(stderr, "got 0x%02x\n", x);
|
|
return x;
|
|
}
|
|
|
|
|
|
static void wait_busy(void)
|
|
{
|
|
while (_c2_addr_read() & InBusy);
|
|
}
|
|
|
|
|
|
static void wait_ready(void)
|
|
{
|
|
while (!(_c2_addr_read() & OutReady));
|
|
}
|
|
|
|
|
|
static void fpdat_write(uint8_t value)
|
|
{
|
|
c2_data_write(value, 1);
|
|
wait_busy();
|
|
}
|
|
|
|
|
|
static uint8_t fpdat_read(void)
|
|
{
|
|
wait_ready();
|
|
return c2_data_read(1);
|
|
}
|
|
|
|
|
|
static void check_status(void)
|
|
{
|
|
uint8_t status;
|
|
|
|
status = fpdat_read();
|
|
if (status != FLASH_STATUS_OK) {
|
|
fprintf(stderr, "status 0x%02x\n", status);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
|
|
/* ----- Block/device-level flash operations ------------------------------- */
|
|
|
|
|
|
void flash_device_erase(void)
|
|
{
|
|
c2_addr_write(FPDAT);
|
|
fpdat_write(FLASH_DEVICE_ERASE);
|
|
check_status();
|
|
fpdat_write(FLASH_ERASE_MAGIC1);
|
|
fpdat_write(FLASH_ERASE_MAGIC2);
|
|
fpdat_write(FLASH_ERASE_MAGIC3);
|
|
check_status();
|
|
}
|
|
|
|
|
|
void flash_block_write(uint16_t addr, const void *data, size_t size)
|
|
{
|
|
int i;
|
|
|
|
if (!size)
|
|
return;
|
|
c2_addr_write(FPDAT);
|
|
fpdat_write(FLASH_BLOCK_WRITE);
|
|
check_status();
|
|
fpdat_write(addr >> 8);
|
|
fpdat_write(addr);
|
|
fpdat_write(size);
|
|
check_status();
|
|
for (i = 0; i != size; i++)
|
|
fpdat_write(((uint8_t *) data)[i]);
|
|
}
|
|
|
|
|
|
void flash_block_read(uint16_t addr, void *data, size_t size)
|
|
{
|
|
int i;
|
|
|
|
if (!size)
|
|
return;
|
|
c2_addr_write(FPDAT);
|
|
fpdat_write(FLASH_BLOCK_READ);
|
|
check_status();
|
|
fpdat_write(addr >> 8);
|
|
fpdat_write(addr);
|
|
fpdat_write(size);
|
|
check_status();
|
|
for (i = 0; i != size; i++)
|
|
((uint8_t *) data)[i] = fpdat_read();
|
|
}
|
|
|
|
|
|
void flash_init(void)
|
|
{
|
|
c2_addr_write(FPCTL);
|
|
c2_data_write(FLASH_INIT_MAGIC1, 1);
|
|
c2_data_write(FLASH_INIT_MAGIC2, 1);
|
|
usleep(20000);
|
|
}
|
|
|
|
|
|
/* @@@ doesn't really seem to work */
|
|
|
|
uint8_t fp_reg_read(uint8_t addr)
|
|
{
|
|
c2_addr_write(FPDAT);
|
|
fpdat_write(REG_READ);
|
|
check_status();
|
|
fpdat_write(addr);
|
|
fpdat_write(1);
|
|
return fpdat_read();
|
|
}
|
|
|
|
|
|
void fp_reg_write(uint8_t addr, uint8_t value)
|
|
{
|
|
c2_addr_write(FPDAT);
|
|
fpdat_write(REG_WRITE);
|
|
check_status();
|
|
fpdat_write(addr);
|
|
fpdat_write(1);
|
|
fpdat_write(value);
|
|
}
|