mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-22 09:58:52 +09:00
344 lines
7.6 KiB
C
344 lines
7.6 KiB
C
![]() |
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* (C) Copyright 2005
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* 2N Telekomunikace, a.s. <www.2n.cz>
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* Ladislav Michl <michl@2n.cz>
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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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/*#if 0 */
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#if (PHYS_SDRAM_1_SIZE != SZ_32M)
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#include "crcek.h"
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#if (CFG_MAX_FLASH_BANKS > 1)
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#error There is always only _one_ flash chip
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#endif
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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#define CMD_READ_ARRAY 0x000000f0
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#define CMD_UNLOCK1 0x000000aa
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#define CMD_UNLOCK2 0x00000055
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#define CMD_ERASE_SETUP 0x00000080
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#define CMD_ERASE_CONFIRM 0x00000030
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#define CMD_PROGRAM 0x000000a0
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#define CMD_UNLOCK_BYPASS 0x00000020
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#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1)))
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#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1)))
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#define BIT_ERASE_DONE 0x00000080
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#define BIT_RDY_MASK 0x00000080
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#define BIT_PROGRAM_ERROR 0x00000020
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#define BIT_TIMEOUT 0x80000000 /* our flag */
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/*-----------------------------------------------------------------------
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*/
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ulong flash_init(void)
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{
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int i;
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flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |
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(AMD_ID_LV800B & FLASH_TYPEMASK);
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flash_info[0].size = PHYS_FLASH_1_SIZE;
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flash_info[0].sector_count = CFG_MAX_FLASH_SECT;
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memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);
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for (i = 0; i < flash_info[0].sector_count; i++) {
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switch (i) {
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case 0: /* 16kB */
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flash_info[0].start[0] = CFG_FLASH_BASE;
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break;
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case 1: /* 8kB */
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flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000;
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break;
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case 2: /* 8kB */
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flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 +
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0x2000;
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break;
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case 3: /* 32 KB */
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flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 +
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2 * 0x2000;
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break;
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case 4:
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flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 +
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2 * 0x2000 + 0x8000;
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break;
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default: /* 64kB */
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flash_info[0].start[i] = flash_info[0].start[i-1] +
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0x10000;
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break;
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}
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}
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/* U-Boot */
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flash_protect(FLAG_PROTECT_SET,
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LOADER1_OFFSET,
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LOADER1_OFFSET + LOADER_SIZE - 1, flash_info);
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/* Protect crcek, env and r_env as well */
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flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info);
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return flash_info[0].size;
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}
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/*-----------------------------------------------------------------------
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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 (AMD_MANUFACT & FLASH_VENDMASK):
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puts("AMD: ");
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break;
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default:
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puts("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 (AMD_ID_LV800B & FLASH_TYPEMASK):
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puts("AM29LV800BB (8Mb)\n");
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break;
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default:
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puts("Unknown chip type\n");
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return;
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}
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printf(" Size: %ld MB in %d sectors\n",
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info->size >> 20, info->sector_count);
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puts(" 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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puts("\n ");
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printf(" %08lX%s", info->start[i],
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info->protect[i] ? " (RO)" : " ");
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}
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puts("\n");
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}
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/*-----------------------------------------------------------------------
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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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ushort result;
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int prot, sect;
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int rc = ERR_OK;
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/* first look for protection bits */
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if (info->flash_id == FLASH_UNKNOWN)
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return ERR_UNKNOWN_FLASH_TYPE;
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if ((s_first < 0) || (s_first > s_last))
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return ERR_INVAL;
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if ((info->flash_id & FLASH_VENDMASK) !=
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(AMD_MANUFACT & FLASH_VENDMASK))
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return ERR_UNKNOWN_FLASH_VENDOR;
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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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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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putc('\n');
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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vu_short *addr = (vu_short *) (info->start[sect]);
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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*addr = CMD_ERASE_CONFIRM;
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/* wait until flash is ready */
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while (1) {
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result = *addr;
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/* check timeout */
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if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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rc = ERR_TIMOUT;
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break;
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}
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if ((result & 0xfff) & BIT_ERASE_DONE)
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break;
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if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
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rc = ERR_PROG_ERROR;
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break;
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}
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}
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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if (rc != ERR_OK)
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goto out;
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putc('.');
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}
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}
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out:
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/* allow flash to settle - wait 10 ms */
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udelay_masked(10000);
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return rc;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash
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*/
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volatile static int write_hword(flash_info_t *info, ulong dest, ushort data)
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{
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vu_short *addr = (vu_short *) dest;
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ushort result;
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int rc = ERR_OK;
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/* check if flash is (sufficiently) erased */
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result = *addr;
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if ((result & data) != data)
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return ERR_NOT_ERASED;
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = CMD_PROGRAM;
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*addr = data;
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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/* wait until flash is ready */
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while (1) {
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result = *addr;
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/* check timeout */
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if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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rc = ERR_TIMOUT;
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break;
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}
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if ((result & 0x80) == (data & 0x80))
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break;
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if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
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result = *addr;
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if ((result & 0x80) != (data & 0x80))
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rc = ERR_PROG_ERROR;
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}
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}
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*addr = CMD_READ_ARRAY;
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if (*addr != data)
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rc = ERR_PROG_ERROR;
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return rc;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash.
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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 cp, wp;
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int l;
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int i, rc;
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ushort data;
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wp = (addr & ~1); /* get lower word aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ((l = addr - wp) != 0) {
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data = 0;
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for (i = 0, cp = wp; i < l; ++i, ++cp)
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data = (data >> 8) | (*(uchar *) cp << 8);
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for (; i < 2 && cnt > 0; ++i) {
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data = (data >> 8) | (*src++ << 8);
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--cnt;
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++cp;
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}
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for (; cnt == 0 && i < 2; ++i, ++cp)
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data = (data >> 8) | (*(uchar *) cp << 8);
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if ((rc = write_hword(info, wp, data)) != 0)
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return (rc);
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wp += 2;
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}
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/*
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* handle word aligned part
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*/
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while (cnt >= 2) {
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data = *((vu_short *) src);
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if ((rc = write_hword(info, wp, data)) != 0)
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return (rc);
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src += 2;
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wp += 2;
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cnt -= 2;
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}
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if (cnt == 0)
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return ERR_OK;
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/*
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* handle unaligned tail bytes
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*/
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data = 0;
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for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
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data = (data >> 8) | (*src++ << 8);
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--cnt;
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}
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for (; i < 2; ++i, ++cp)
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data = (data >> 8) | (*(uchar *) cp << 8);
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return write_hword(info, wp, data);
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}
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#endif
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