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https://github.com/AsahiLinux/u-boot
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467 lines
10 KiB
C
467 lines
10 KiB
C
/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/immap.h>
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#ifndef CONFIG_SYS_FLASH_CFI
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typedef unsigned short FLASH_PORT_WIDTH;
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typedef volatile unsigned short FLASH_PORT_WIDTHV;
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#define FPW FLASH_PORT_WIDTH
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#define FPWV FLASH_PORT_WIDTHV
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#define FLASH_CYCLE1 0x5555
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#define FLASH_CYCLE2 0x2aaa
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#define SYNC __asm__("nop")
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/*-----------------------------------------------------------------------
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* Functions
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*/
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ulong flash_get_size(FPWV * addr, flash_info_t * info);
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int flash_get_offsets(ulong base, flash_info_t * info);
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int write_word(flash_info_t * info, FPWV * dest, u16 data);
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void inline spin_wheel(void);
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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ulong flash_init(void)
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{
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ulong size = 0;
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ulong fbase = 0;
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fbase = (ulong) CONFIG_SYS_FLASH_BASE;
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flash_get_size((FPWV *) fbase, &flash_info[0]);
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flash_get_offsets((ulong) fbase, &flash_info[0]);
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fbase += flash_info[0].size;
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size += flash_info[0].size;
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/* Protect monitor and environment sectors */
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
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return size;
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}
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int flash_get_offsets(ulong base, flash_info_t * info)
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{
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int j, k;
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
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info->start[0] = base;
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for (k = 0, j = 0; j < CONFIG_SYS_SST_SECT; j++, k++) {
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info->start[k + 1] = info->start[k] + CONFIG_SYS_SST_SECTSZ;
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info->protect[k] = 0;
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}
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}
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return ERR_OK;
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}
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void flash_print_info(flash_info_t * info)
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{
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int i;
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_SST:
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printf("SST ");
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break;
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default:
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printf("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_SST6401B:
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printf("SST39VF6401B\n");
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break;
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default:
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printf("Unknown Chip Type\n");
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return;
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}
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if (info->size > 0x100000) {
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int remainder;
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printf(" Size: %ld", info->size >> 20);
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remainder = (info->size % 0x100000);
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if (remainder) {
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remainder >>= 10;
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remainder = (int)((float)
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(((float)remainder / (float)1024) *
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10000));
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printf(".%d ", remainder);
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}
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printf("MB in %d Sectors\n", info->sector_count);
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} else
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printf(" Size: %ld KB in %d Sectors\n",
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info->size >> 10, info->sector_count);
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printf(" Sector Start Addresses:");
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for (i = 0; i < info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf("\n ");
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printf(" %08lX%s",
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info->start[i], info->protect[i] ? " (RO)" : " ");
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}
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printf("\n");
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}
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/*
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* The following code cannot be run from FLASH!
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*/
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ulong flash_get_size(FPWV * addr, flash_info_t * info)
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{
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u16 value;
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addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
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addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
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addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
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switch (addr[0] & 0xffff) {
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case (u8) SST_MANUFACT:
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info->flash_id = FLASH_MAN_SST;
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value = addr[1];
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break;
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default:
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printf("Unknown Flash\n");
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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*addr = (FPW) 0x00F000F0;
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return (0); /* no or unknown flash */
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}
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switch (value) {
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case (u16) SST_ID_xF6401B:
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info->flash_id += FLASH_SST6401B;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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break;
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}
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info->sector_count = 0;
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info->size = 0;
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info->sector_count = CONFIG_SYS_SST_SECT;
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info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
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/* reset ID mode */
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*addr = (FPWV) 0x00F000F0;
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if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
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printf("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
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info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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}
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return (info->size);
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}
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int flash_erase(flash_info_t * info, int s_first, int s_last)
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{
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FPWV *addr;
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int flag, prot, sect, count;
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ulong type, start, last;
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int rcode = 0, flashtype = 0;
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN)
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printf("- missing\n");
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else
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printf("- no sectors to erase\n");
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return 1;
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}
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type = (info->flash_id & FLASH_VENDMASK);
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switch (type) {
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case FLASH_MAN_SST:
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flashtype = 1;
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break;
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default:
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type = (info->flash_id & FLASH_VENDMASK);
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printf("Can't erase unknown flash type %08lx - aborted\n",
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info->flash_id);
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return 1;
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}
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prot = 0;
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot)
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printf("- Warning: %d protected sectors will not be erased!\n",
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prot);
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else
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printf("\n");
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flag = disable_interrupts();
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start = get_timer(0);
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last = start;
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if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
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if (prot == 0) {
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addr = (FPWV *) info->start[0];
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addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
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addr[FLASH_CYCLE2] = 0x0055; /* unlock */
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addr[FLASH_CYCLE1] = 0x0080; /* erase mode */
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addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
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addr[FLASH_CYCLE2] = 0x0055; /* unlock */
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*addr = 0x0030; /* erase chip */
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count = 0;
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start = get_timer(0);
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while ((*addr & 0x0080) != 0x0080) {
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if (count++ > 0x10000) {
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spin_wheel();
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count = 0;
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}
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if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf("Timeout\n");
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*addr = 0x00F0; /* reset to read mode */
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return 1;
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}
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}
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*addr = 0x00F0; /* reset to read mode */
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printf("\b. done\n");
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if (flag)
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enable_interrupts();
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return 0;
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} else if (prot == CONFIG_SYS_SST_SECT) {
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return 1;
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}
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}
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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addr = (FPWV *) (info->start[sect]);
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printf(".");
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/* arm simple, non interrupt dependent timer */
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start = get_timer(0);
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switch (flashtype) {
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case 1:
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{
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FPWV *base; /* first address in bank */
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flag = disable_interrupts();
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base = (FPWV *) (CONFIG_SYS_FLASH_BASE); /* First sector */
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base[FLASH_CYCLE1] = 0x00AA; /* unlock */
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base[FLASH_CYCLE2] = 0x0055; /* unlock */
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base[FLASH_CYCLE1] = 0x0080; /* erase mode */
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base[FLASH_CYCLE1] = 0x00AA; /* unlock */
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base[FLASH_CYCLE2] = 0x0055; /* unlock */
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*addr = 0x0050; /* erase sector */
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if (flag)
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enable_interrupts();
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while ((*addr & 0x0080) != 0x0080) {
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if (get_timer(start) >
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CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf("Timeout\n");
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*addr = 0x00F0; /* reset to read mode */
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rcode = 1;
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break;
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}
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}
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*addr = 0x00F0; /* reset to read mode */
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break;
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}
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} /* switch (flashtype) */
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}
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}
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printf(" done\n");
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if (flag)
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enable_interrupts();
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return rcode;
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}
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int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong wp, count;
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u16 data;
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int rc, port_width;
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if (info->flash_id == FLASH_UNKNOWN)
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return 4;
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/* get lower word aligned address */
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wp = addr;
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port_width = sizeof(FPW);
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/* handle unaligned start bytes */
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if (wp & 1) {
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data = *((FPWV *) wp);
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data = (data << 8) | *src;
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if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
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return (rc);
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wp++;
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cnt -= 1;
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src++;
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}
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while (cnt >= 2) {
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/*
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* handle word aligned part
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*/
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count = 0;
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data = *((FPWV *) src);
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if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
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return (rc);
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wp += 2;
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src += 2;
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cnt -= 2;
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if (count++ > 0x800) {
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spin_wheel();
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count = 0;
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}
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}
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/* handle word aligned part */
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if (cnt) {
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/* handle word aligned part */
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count = 0;
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data = *((FPWV *) wp);
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data = (data & 0x00FF) | (*src << 8);
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if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
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return (rc);
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wp++;
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src++;
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cnt -= 1;
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if (count++ > 0x800) {
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spin_wheel();
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count = 0;
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}
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}
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if (cnt == 0)
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return ERR_OK;
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------
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* Write a word to Flash
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* A word is 16 bits, whichever the bus width of the flash bank
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* (not an individual chip) is.
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*
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* returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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int write_word(flash_info_t * info, FPWV * dest, u16 data)
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{
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ulong start;
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int flag;
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int res = 0; /* result, assume success */
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FPWV *base; /* first address in flash bank */
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/* Check if Flash is (sufficiently) erased */
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if ((*dest & (u8) data) != (u8) data) {
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return (2);
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}
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base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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base[FLASH_CYCLE1] = (u8) 0x00AA00AA; /* unlock */
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base[FLASH_CYCLE2] = (u8) 0x00550055; /* unlock */
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base[FLASH_CYCLE1] = (u8) 0x00A000A0; /* selects program mode */
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*dest = data; /* start programming the data */
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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start = get_timer(0);
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/* data polling for D7 */
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while (res == 0
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&& (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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*dest = (u8) 0x00F000F0; /* reset bank */
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res = 1;
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}
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}
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*dest++ = (u8) 0x00F000F0; /* reset bank */
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return (res);
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}
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void inline spin_wheel(void)
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{
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static int p = 0;
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static char w[] = "\\/-";
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printf("\010%c", w[p]);
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(++p == 3) ? (p = 0) : 0;
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}
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#endif
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