mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
413 lines
8.5 KiB
C
413 lines
8.5 KiB
C
/*
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* (C) Copyright 2005
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* BuS Elektronik GmbH & Co.KG <esw@bus-elektonik.de>
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*
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* Based On
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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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 "cfm_flash.h"
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#define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
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#define FLASH_BANK_SIZE 0x200000
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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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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printf ("AMD: ");
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switch (info->flash_id & FLASH_TYPEMASK) {
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case (AMD_ID_LV160B & FLASH_TYPEMASK):
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printf ("AM29LV160B (16Bit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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break;
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case FREESCALE_MANUFACT & FLASH_VENDMASK:
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cfm_flash_print_info (info);
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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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puts (" Size: ");
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if ((info->size >> 20) > 0)
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{
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printf ("%ld MiB",info->size >> 20);
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}
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else
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{
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printf ("%ld KiB",info->size >> 10);
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}
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printf (" in %d Sectors\n", 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 % 4) == 0) {
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printf ("\n ");
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}
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printf ("%02d: %08lX%s ", i,info->start[i],
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info->protect[i] ? " P" : " ");
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}
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printf ("\n\n");
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}
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unsigned long flash_init (void)
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{
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int i, j;
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ulong size = 0;
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
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ulong flashbase = 0;
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switch (i)
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{
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case 1:
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flash_info[i].flash_id =
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(AMD_MANUFACT & FLASH_VENDMASK) |
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(AMD_ID_LV160B & FLASH_TYPEMASK);
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flash_info[i].size = FLASH_BANK_SIZE;
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flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
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flashbase = PHYS_FLASH_1;
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for (j = 0; j < flash_info[i].sector_count; j++) {
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if (j == 0) {
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/* 1st is 16 KiB */
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flash_info[i].start[j] = flashbase;
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}
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if ((j >= 1) && (j <= 2)) {
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/* 2nd and 3rd are 8 KiB */
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flash_info[i].start[j] =
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flashbase + 0x4000 + 0x2000 * (j - 1);
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}
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if (j == 3) {
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/* 4th is 32 KiB */
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flash_info[i].start[j] = flashbase + 0x8000;
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}
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if ((j >= 4) && (j <= 34)) {
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/* rest is 256 KiB */
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flash_info[i].start[j] =
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flashbase + 0x10000 + 0x10000 * (j - 4);
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}
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}
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break;
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case 0:
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cfm_flash_init (&flash_info[i]);
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break;
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default:
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panic ("configured to many flash banks!\n");
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}
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size += flash_info[i].size;
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}
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flash_protect (FLAG_PROTECT_SET,
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CONFIG_SYS_FLASH_BASE,
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CONFIG_SYS_FLASH_BASE + 0xffff, &flash_info[0]);
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return size;
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}
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#define CMD_READ_ARRAY 0x00F0
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#define CMD_UNLOCK1 0x00AA
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#define CMD_UNLOCK2 0x0055
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#define CMD_ERASE_SETUP 0x0080
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#define CMD_ERASE_CONFIRM 0x0030
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#define CMD_PROGRAM 0x00A0
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#define CMD_UNLOCK_BYPASS 0x0020
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#define MEM_FLASH_ADDR1 (*(volatile u16 *)(info->start[0] + (0x00000555<<1)))
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#define MEM_FLASH_ADDR2 (*(volatile u16 *)(info->start[0] + (0x000002AA<<1)))
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#define BIT_ERASE_DONE 0x0080
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#define BIT_RDY_MASK 0x0080
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#define BIT_PROGRAM_ERROR 0x0020
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#define BIT_TIMEOUT 0x80000000 /* our flag */
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#define ERR_READY -1
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int amd_flash_erase_sector(flash_info_t * info, int sector)
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{
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int state;
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ulong result;
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volatile u16 *addr =
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(volatile u16 *) (info->start[sector]);
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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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state = 0;
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set_timer (0);
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do {
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result = *addr;
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/* check timeout */
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if (get_timer (0) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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state = ERR_TIMOUT;
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}
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if (!state && (result & 0xFFFF) & BIT_ERASE_DONE)
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state = ERR_READY;
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}
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while (!state);
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if (state == ERR_READY)
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state = ERR_OK;
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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return state;
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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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int iflag, cflag;
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int sector;
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int rc;
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rc = ERR_OK;
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if (info->flash_id == FLASH_UNKNOWN)
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{
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rc = ERR_UNKNOWN_FLASH_TYPE;
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} /* (info->flash_id == FLASH_UNKNOWN) */
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if ((s_first < 0) || (s_first > s_last) || s_last >= info->sector_count)
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{
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rc = ERR_INVAL;
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}
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cflag = icache_status ();
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icache_disable ();
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iflag = disable_interrupts ();
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for (sector = s_first; (sector <= s_last) && (rc == ERR_OK); sector++) {
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if (info->protect[sector])
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{
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putc('P'); /* protected sector will not erase */
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}
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else
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{
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/* erase on unprotected sector */
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puts("E\b");
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switch (info->flash_id & FLASH_VENDMASK)
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{
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case (AMD_MANUFACT & FLASH_VENDMASK):
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rc = amd_flash_erase_sector(info,sector);
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break;
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case (FREESCALE_MANUFACT & FLASH_VENDMASK):
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rc = cfm_flash_erase_sector(info,sector);
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break;
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default:
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return ERR_UNKNOWN_FLASH_VENDOR;
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}
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putc('.');
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}
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}
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if (rc!=ERR_OK)
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{
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printf ("\n ");
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flash_perror (rc);
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}
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else
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{
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printf (" done\n");
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}
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udelay (10000); /* allow flash to settle - wait 10 ms */
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if (iflag)
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enable_interrupts ();
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if (cflag)
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icache_enable ();
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return rc;
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}
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volatile static int amd_write_word (flash_info_t * info, ulong dest, u16 data)
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{
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volatile u16 *addr;
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ulong result;
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int cflag, iflag;
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int state;
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/*
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* Check if Flash is (sufficiently) erased
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*/
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addr = (volatile u16 *) dest;
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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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/*
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* Disable interrupts which might cause a timeout
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* here. Remember that our exception vectors are
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* at address 0 in the flash, and we don't want a
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* (ticker) exception to happen while the flash
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* chip is in programming mode.
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*/
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cflag = icache_status ();
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icache_disable ();
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iflag = disable_interrupts ();
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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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set_timer (0);
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/* wait until flash is ready */
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state = 0;
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do {
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result = *addr;
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/* check timeout */
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if (get_timer (0) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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state = ERR_TIMOUT;
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}
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if (!state && ((result & BIT_RDY_MASK) == (data & BIT_RDY_MASK)))
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state = ERR_READY;
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} while (!state);
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*addr = CMD_READ_ARRAY;
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if (state == ERR_READY)
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state = ERR_OK;
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if ((*addr != data) && (state != ERR_TIMOUT))
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state = ERR_PROG_ERROR;
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if (iflag)
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enable_interrupts ();
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if (cflag)
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icache_enable ();
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return state;
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}
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int amd_flash_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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int rc;
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ulong dest;
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u16 data;
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rc = ERR_OK;
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if (addr & 1)
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{
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debug ("Byte alignment not supported\n");
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rc = ERR_ALIGN;
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}
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if (cnt & 1)
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{
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debug ("Byte transfer not supported\n");
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rc = ERR_ALIGN;
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}
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dest = addr;
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while ((cnt>=2) && (rc == ERR_OK))
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{
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data = *((volatile u16 *) src);
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rc=amd_write_word (info,dest,data);
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src +=2;
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dest +=2;
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cnt -=2;
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}
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return rc;
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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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int rc;
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switch (info->flash_id & FLASH_VENDMASK)
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{
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case (AMD_MANUFACT & FLASH_VENDMASK):
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rc = amd_flash_write_buff(info,src,addr,cnt);
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break;
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case (FREESCALE_MANUFACT & FLASH_VENDMASK):
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rc = cfm_flash_write_buff(info,src,addr,cnt);
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break;
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default:
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rc = ERR_UNKNOWN_FLASH_VENDOR;
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}
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return rc;
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}
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int amd_flash_protect(flash_info_t * info,long sector,int prot)
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{
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int rc;
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rc= ERR_OK;
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if (prot)
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{
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info->protect[sector]=1;
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}
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else
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{
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info->protect[sector]=0;
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}
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return rc;
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}
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#ifdef CONFIG_SYS_FLASH_PROTECTION
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int flash_real_protect(flash_info_t * info,long sector,int prot)
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{
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int rc;
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switch (info->flash_id & FLASH_VENDMASK)
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{
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case (AMD_MANUFACT & FLASH_VENDMASK):
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rc = amd_flash_protect(info,sector,prot);
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break;
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case (FREESCALE_MANUFACT & FLASH_VENDMASK):
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rc = cfm_flash_protect(info,sector,prot);
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break;
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default:
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rc = ERR_UNKNOWN_FLASH_VENDOR;
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}
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return rc;
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}
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#endif
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