mirror of
https://github.com/AsahiLinux/u-boot
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386 lines
9 KiB
C
386 lines
9 KiB
C
/*
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* (C) Copyright 2001-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Flash Routines for Intel devices
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*
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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 <mpc8xx.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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/*-----------------------------------------------------------------------
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*/
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ulong flash_get_size (volatile unsigned long *baseaddr,
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flash_info_t * info)
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{
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short i;
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unsigned long flashtest_h, flashtest_l;
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info->sector_count = info->size = 0;
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info->flash_id = FLASH_UNKNOWN;
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/* Write query command sequence and test FLASH answer
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*/
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baseaddr[0] = 0x00980098;
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baseaddr[1] = 0x00980098;
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flashtest_h = baseaddr[0]; /* manufacturer ID */
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flashtest_l = baseaddr[1];
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if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
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return (0); /* no or unknown flash */
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flashtest_h = baseaddr[2]; /* device ID */
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flashtest_l = baseaddr[3];
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if (flashtest_h != flashtest_l)
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return (0);
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switch (flashtest_h) {
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case INTEL_ID_28F160C3B:
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info->flash_id = FLASH_28F160C3B;
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info->sector_count = 39;
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info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
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break;
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case INTEL_ID_28F160F3B:
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info->flash_id = FLASH_28F160F3B;
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info->sector_count = 39;
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info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
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break;
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case INTEL_ID_28F640C3B:
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info->flash_id = FLASH_28F640C3B;
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info->sector_count = 135;
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info->size = 0x02000000; /* 16 * 2 MB = 32 MB */
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break;
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default:
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return (0); /* no or unknown flash */
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}
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info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
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if (info->flash_id & FLASH_BTYPE) {
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volatile unsigned long *tmp = baseaddr;
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/* set up sector start adress table (bottom sector type)
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* AND unlock the sectors (if our chip is 160C3 or 640c3)
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*/
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for (i = 0; i < info->sector_count; i++) {
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if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) ||
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((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) {
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tmp[0] = 0x00600060;
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tmp[1] = 0x00600060;
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tmp[0] = 0x00D000D0;
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tmp[1] = 0x00D000D0;
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}
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info->start[i] = (uint) tmp;
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tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
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}
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}
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memset (info->protect, 0, info->sector_count);
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baseaddr[0] = 0x00FF00FF;
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baseaddr[1] = 0x00FF00FF;
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return (info->size);
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}
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/*-----------------------------------------------------------------------
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*/
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unsigned long flash_init (void)
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{
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unsigned long size_b0 = 0;
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int i;
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/* Init: no FLASHes known
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*/
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Static FLASH Bank configuration here (only one bank) */
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size_b0 = flash_get_size ((ulong *) CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b0, size_b0 >> 20);
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}
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/* protect monitor and environment sectors
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*/
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#ifndef CONFIG_BOOT_ROM
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/* If U-Boot is booted from ROM the CONFIG_SYS_MONITOR_BASE > CONFIG_SYS_FLASH0_BASE
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* but we shouldn't protect it.
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*/
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# if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
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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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);
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# endif
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#endif /* CONFIG_BOOT_ROM */
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#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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flash_protect (FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
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#endif
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return (size_b0);
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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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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("missing or unknown FLASH type\n");
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return;
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}
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switch ((info->flash_id >> 16) & 0xff) {
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case 0x89:
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printf ("INTEL ");
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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_28F160C3B:
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printf ("28F160C3B (16 M, bottom sector)\n");
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break;
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case FLASH_28F160F3B:
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printf ("28F160F3B (16 M, bottom sector)\n");
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break;
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case FLASH_28F640C3B:
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printf ("28F640C3B (64 M, bottom sector)\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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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, 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],
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info->protect[i] ? " (RO)" : " "
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);
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}
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printf ("\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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int flag, prot, sect;
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ulong start, now, last;
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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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}
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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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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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}
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/* Start erase on unprotected sectors
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*/
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for (sect = s_first; sect <= s_last; sect++) {
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volatile ulong *addr =
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(volatile unsigned long *) info->start[sect];
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start = get_timer (0);
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last = start;
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if (info->protect[sect] == 0) {
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/* Disable interrupts which might cause a timeout here
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*/
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flag = disable_interrupts ();
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/* Erase the block
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*/
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addr[0] = 0x00200020;
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addr[1] = 0x00200020;
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addr[0] = 0x00D000D0;
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addr[1] = 0x00D000D0;
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/* re-enable interrupts if necessary
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*/
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if (flag)
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enable_interrupts ();
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/* wait at least 80us - let's wait 1 ms
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*/
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udelay (1000);
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last = start;
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while ((addr[0] & 0x00800080) != 0x00800080 ||
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(addr[1] & 0x00800080) != 0x00800080) {
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if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout (erase suspended!)\n");
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/* Suspend erase
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*/
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addr[0] = 0x00B000B0;
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addr[1] = 0x00B000B0;
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goto DONE;
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}
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/* show that we're waiting
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*/
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if ((now - last) > 1000) { /* every second */
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serial_putc ('.');
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last = now;
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}
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}
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if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
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printf ("*** ERROR: erase failed!\n");
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goto DONE;
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}
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}
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/* Clear status register and reset to read mode
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*/
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addr[0] = 0x00500050;
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addr[1] = 0x00500050;
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addr[0] = 0x00FF00FF;
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addr[1] = 0x00FF00FF;
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}
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printf (" done\n");
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DONE:
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return 0;
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}
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static int write_word (flash_info_t *, volatile unsigned long *, ulong);
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/*-----------------------------------------------------------------------
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* Copy memory to flash, 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_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong v;
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int i, l, cc = cnt, res = 0;
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for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
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l = (addr & 3);
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addr &= ~3;
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for (i = 0; i < 4; i++) {
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v = (v << 8) + (i < l || i - l >= cc ?
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*((unsigned char *) addr + i) : *src++);
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}
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if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
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break;
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}
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return (res);
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}
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/*-----------------------------------------------------------------------
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* Write a word to Flash, 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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static int write_word (flash_info_t * info, volatile unsigned long *addr,
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ulong data)
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{
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int flag, res = 0;
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ulong start;
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/* Check if Flash is (sufficiently) erased
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*/
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if ((*addr & data) != data)
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return (2);
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/* Disable interrupts which might cause a timeout here
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*/
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flag = disable_interrupts ();
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*addr = 0x00400040;
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*addr = data;
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/* re-enable interrupts if necessary
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*/
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if (flag)
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enable_interrupts ();
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start = get_timer (0);
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while ((*addr & 0x00800080) != 0x00800080) {
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if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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/* Suspend program
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*/
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*addr = 0x00B000B0;
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res = 1;
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goto OUT;
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}
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}
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if (*addr & 0x00220022) {
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printf ("*** ERROR: program failed!\n");
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res = 1;
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}
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OUT:
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/* Clear status register and reset to read mode
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*/
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*addr = 0x00500050;
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*addr = 0x00FF00FF;
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return (res);
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}
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