+++ /dev/null
-/*
- * 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 */
projects / u-boot.git / commitdiff