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/*
* Copyright (C) 2005-2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#ifdef CONFIG_ATSTK1000_EXT_FLASH
#include <asm/arch/cacheflush.h>
#include <asm/io.h>
#include <asm/sections.h>
DECLARE_GLOBAL_DATA_PTR;
flash_info_t flash_info[1];
static void flash_identify(uint16_t *flash, flash_info_t *info)
{
unsigned long flags;
flags = disable_interrupts();
dcache_flush_unlocked();
writew(0xaa, flash + 0x555);
writew(0x55, flash + 0xaaa);
writew(0x90, flash + 0x555);
info->flash_id = readl(flash);
writew(0xff, flash);
readw(flash);
if (flags)
enable_interrupts();
}
unsigned long flash_init(void)
{
unsigned long addr;
unsigned int i;
flash_info[0].size = CONFIG_SYS_FLASH_SIZE;
flash_info[0].sector_count = 135;
flash_identify(uncached((void *)CONFIG_SYS_FLASH_BASE), &flash_info[0]);
for (i = 0, addr = 0; i < 8; i++, addr += 0x2000)
flash_info[0].start[i] = addr;
for (; i < flash_info[0].sector_count; i++, addr += 0x10000)
flash_info[0].start[i] = addr;
return CONFIG_SYS_FLASH_SIZE;
}
void flash_print_info(flash_info_t *info)
{
printf("Flash: Vendor ID: 0x%02lx, Product ID: 0x%02lx\n",
info->flash_id >> 16, info->flash_id & 0xffff);
printf("Size: %ld MB in %d sectors\n",
info->size >> 10, info->sector_count);
}
int flash_erase(flash_info_t *info, int s_first, int s_last)
{
unsigned long flags;
unsigned long start_time;
uint16_t *fb, *sb;
unsigned int i;
int ret;
uint16_t status;
if ((s_first < 0) || (s_first > s_last)
|| (s_last >= info->sector_count)) {
puts("Error: first and/or last sector out of range\n");
return ERR_INVAL;
}
for (i = s_first; i < s_last; i++)
if (info->protect[i]) {
printf("Error: sector %d is protected\n", i);
return ERR_PROTECTED;
}
fb = (uint16_t *)uncached(info->start[0]);
dcache_flush_unlocked();
for (i = s_first; (i <= s_last) && !ctrlc(); i++) {
printf("Erasing sector %3d...", i);
sb = (uint16_t *)uncached(info->start[i]);
flags = disable_interrupts();
start_time = get_timer(0);
/* Unlock sector */
writew(0xaa, fb + 0x555);
writew(0x70, sb);
/* Erase sector */
writew(0xaa, fb + 0x555);
writew(0x55, fb + 0xaaa);
writew(0x80, fb + 0x555);
writew(0xaa, fb + 0x555);
writew(0x55, fb + 0xaaa);
writew(0x30, sb);
/* Wait for completion */
ret = ERR_OK;
do {
/* TODO: Timeout */
status = readw(sb);
} while ((status != 0xffff) && !(status & 0x28));
writew(0xf0, fb);
/*
* Make sure the command actually makes it to the bus
* before we re-enable interrupts.
*/
readw(fb);
if (flags)
enable_interrupts();
if (status != 0xffff) {
printf("Flash erase error at address 0x%p: 0x%02x\n",
sb, status);
ret = ERR_PROG_ERROR;
break;
}
}
if (ctrlc())
printf("User interrupt!\n");
return ERR_OK;
}
int write_buff(flash_info_t *info, uchar *src,
ulong addr, ulong count)
{
unsigned long flags;
uint16_t *base, *p, *s, *end;
uint16_t word, status, status1;
int ret = ERR_OK;
if (addr < info->start[0]
|| (addr + count) > (info->start[0] + info->size)
|| (addr + count) < addr) {
puts("Error: invalid address range\n");
return ERR_INVAL;
}
if (addr & 1 || count & 1 || (unsigned int)src & 1) {
puts("Error: misaligned source, destination or count\n");
return ERR_ALIGN;
}
base = (uint16_t *)uncached(info->start[0]);
end = (uint16_t *)uncached(addr + count);
flags = disable_interrupts();
dcache_flush_unlocked();
sync_write_buffer();
for (p = (uint16_t *)uncached(addr), s = (uint16_t *)src;
p < end && !ctrlc(); p++, s++) {
word = *s;
writew(0xaa, base + 0x555);
writew(0x55, base + 0xaaa);
writew(0xa0, base + 0x555);
writew(word, p);
sync_write_buffer();
/* Wait for completion */
status1 = readw(p);
do {
/* TODO: Timeout */
status = status1;
status1 = readw(p);
} while (((status ^ status1) & 0x40) /* toggled */
&& !(status1 & 0x28)); /* error bits */
/*
* We'll need to check once again for toggle bit
* because the toggle bit may stop toggling as I/O5
* changes to "1" (ref at49bv642.pdf p9)
*/
status1 = readw(p);
status = readw(p);
if ((status ^ status1) & 0x40) {
printf("Flash write error at address 0x%p: "
"0x%02x != 0x%02x\n",
p, status,word);
ret = ERR_PROG_ERROR;
writew(0xf0, base);
readw(base);
break;
}
writew(0xf0, base);
readw(base);
}
if (flags)
enable_interrupts();
return ret;
}
#endif /* CONFIG_ATSTK1000_EXT_FLASH */
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