+++ /dev/null
-/*
- * (C) Copyright 2000
- * Marius Groeger <mgroeger@sysgo.de>
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- *
- * (C) Copyright 2000
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * Flash Routines for AMD 29F080B devices
- *
- *--------------------------------------------------------------------
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <mpc8xx.h>
-
-flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
-
-/*-----------------------------------------------------------------------
- * Functions
- */
-
-static ulong flash_get_size (vu_long *addr, flash_info_t *info);
-static int write_word (flash_info_t *info, ulong dest, ulong data);
-
-/*-----------------------------------------------------------------------
- */
-
-unsigned long flash_init (void)
-{
- unsigned long size;
- int i;
-
- /* Init: no FLASHes known */
- for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
- flash_info[i].flash_id = FLASH_UNKNOWN;
- }
-
- /* for now, only support the 4 MB Flash SIMM */
- size = flash_get_size((vu_long *)CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
-
- /*
- * protect monitor and environment sectors
- */
-
-#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
- flash_protect(FLAG_PROTECT_SET,
- CONFIG_SYS_MONITOR_BASE,
- CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
- &flash_info[0]);
-#endif
-
-#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
-# ifndef CONFIG_ENV_SIZE
-# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
-# endif
- flash_protect(FLAG_PROTECT_SET,
- CONFIG_ENV_ADDR,
- CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
- &flash_info[0]);
-#endif
-
- return /*size*/ (CONFIG_SYS_FLASH0_SIZE * 1024 * 1024);
-}
-
-/*-----------------------------------------------------------------------
- */
-void flash_print_info (flash_info_t *info)
-{
- int i;
-
- if (info->flash_id == FLASH_UNKNOWN) {
- printf ("missing or unknown FLASH type\n");
- return;
- }
-
- switch ((info->flash_id >> 16) & 0xff) {
- case 0x1:
- printf ("AMD ");
- break;
- default:
- printf ("Unknown Vendor ");
- break;
- }
-
- switch (info->flash_id & FLASH_TYPEMASK) {
- case AMD_ID_F040B:
- printf ("AM29F040B (4 Mbit)\n");
- break;
- case AMD_ID_F080B:
- printf ("AM29F080B (8 Mbit)\n");
- break;
- default:
- printf ("Unknown Chip Type\n");
- break;
- }
-
- printf (" Size: %ld MB in %d Sectors\n",
- info->size >> 20, info->sector_count);
-
- printf (" Sector Start Addresses:");
- for (i=0; i<info->sector_count; ++i) {
- if ((i % 5) == 0)
- printf ("\n ");
- printf (" %08lX%s",
- info->start[i],
- info->protect[i] ? " (RO)" : " "
- );
- }
- printf ("\n");
- return;
-}
-
-/*
- * The following code cannot be run from FLASH!
- */
-
-static ulong flash_get_size (vu_long *addr, flash_info_t *info)
-{
- short i;
- vu_long vendor, devid;
- ulong base = (ulong)addr;
-
-/* printf("addr = %08lx\n", (unsigned long)addr); */
-
- /* Reset and Write auto select command: read Manufacturer ID */
- addr[0] = 0xf0f0f0f0;
- addr[0x0555] = 0xAAAAAAAA;
- addr[0x02AA] = 0x55555555;
- addr[0x0555] = 0x90909090;
- udelay (1000);
-
- vendor = addr[0];
-/* printf("vendor = %08lx\n", vendor); */
- if (vendor != 0x01010101) {
- info->size = 0;
- goto out;
- }
-
- devid = addr[1];
-/* printf("devid = %08lx\n", devid); */
-
- if ((devid & 0xff) == AMD_ID_F080B) {
- info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F080B;
- /* we have 16 sectors with 64KB each x 4 */
- info->sector_count = 16;
- info->size = 4 * info->sector_count * 64*1024;
- }
- else {
- info->size = 0;
- goto out;
- }
-
- /* check for protected sectors */
- for (i = 0; i < info->sector_count; i++) {
- /* sector base address */
- info->start[i] = base + i * (info->size / info->sector_count);
- /* read sector protection at sector address, (A7 .. A0) = 0x02 */
- /* D0 = 1 if protected */
- addr = (volatile unsigned long *)(info->start[i]);
- info->protect[i] = addr[2] & 1;
- }
-
- /* reset command */
- addr = (vu_long *)info->start[0];
-
-out:
- addr[0] = 0xf0f0f0f0;
-
- return info->size;
-}
-
-
-/*-----------------------------------------------------------------------
- */
-
-int flash_erase (flash_info_t *info, int s_first, int s_last)
-{
- vu_long *addr = (vu_long*)(info->start[0]);
- int flag, prot, sect, l_sect;
- ulong start, now, last;
-
- if ((s_first < 0) || (s_first > s_last)) {
- if (info->flash_id == FLASH_UNKNOWN) {
- printf ("- missing\n");
- } else {
- printf ("- no sectors to erase\n");
- }
- return 1;
- }
-
- prot = 0;
- for (sect = s_first; sect <= s_last; sect++) {
- if (info->protect[sect]) {
- prot++;
- }
- }
-
- if (prot) {
- printf ("- Warning: %d protected sectors will not be erased!\n",
- prot);
- } else {
- printf ("\n");
- }
-
- l_sect = -1;
-
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
-
- addr[0x0555] = 0xAAAAAAAA;
- addr[0x02AA] = 0x55555555;
- addr[0x0555] = 0x80808080;
- addr[0x0555] = 0xAAAAAAAA;
- addr[0x02AA] = 0x55555555;
- udelay (100);
-
- /* Start erase on unprotected sectors */
- for (sect = s_first; sect<=s_last; sect++) {
- if (info->protect[sect] == 0) { /* not protected */
- addr = (vu_long*)(info->start[sect]);
- addr[0] = 0x30303030;
- l_sect = sect;
- }
- }
-
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
-
- /* wait at least 80us - let's wait 1 ms */
- udelay (1000);
-
- /*
- * We wait for the last triggered sector
- */
- if (l_sect < 0)
- goto DONE;
-
- start = get_timer (0);
- last = start;
- addr = (vu_long*)(info->start[l_sect]);
- while ((addr[0] & 0x80808080) != 0x80808080) {
- if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
- printf ("Timeout\n");
- return 1;
- }
- /* show that we're waiting */
- if ((now - last) > 1000) { /* every second */
- serial_putc ('.');
- last = now;
- }
- }
-
- DONE:
- /* reset to read mode */
- addr = (volatile unsigned long *)info->start[0];
- addr[0] = 0xF0F0F0F0; /* reset bank */
-
- printf (" done\n");
- return 0;
-}
-
-/*-----------------------------------------------------------------------
- * Copy memory to flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-
-int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
-{
- ulong cp, wp, data;
- int i, l, rc;
-
- wp = (addr & ~3); /* get lower word aligned address */
-
- /*
- * handle unaligned start bytes
- */
- if ((l = addr - wp) != 0) {
- data = 0;
- for (i=0, cp=wp; i<l; ++i, ++cp) {
- data = (data << 8) | (*(uchar *)cp);
- }
- for (; i<4 && cnt>0; ++i) {
- data = (data << 8) | *src++;
- --cnt;
- ++cp;
- }
- for (; cnt==0 && i<4; ++i, ++cp) {
- data = (data << 8) | (*(uchar *)cp);
- }
-
- if ((rc = write_word(info, wp, data)) != 0) {
- return (rc);
- }
- wp += 4;
- }
-
- /*
- * handle word aligned part
- */
- while (cnt >= 4) {
- data = 0;
- for (i=0; i<4; ++i) {
- data = (data << 8) | *src++;
- }
- if ((rc = write_word(info, wp, data)) != 0) {
- return (rc);
- }
- wp += 4;
- cnt -= 4;
- }
-
- if (cnt == 0) {
- return (0);
- }
-
- /*
- * handle unaligned tail bytes
- */
- data = 0;
- for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
- data = (data << 8) | *src++;
- --cnt;
- }
- for (; i<4; ++i, ++cp) {
- data = (data << 8) | (*(uchar *)cp);
- }
-
- return (write_word(info, wp, data));
-}
-
-/*-----------------------------------------------------------------------
- * Write a word to Flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-static int write_word (flash_info_t *info, ulong dest, ulong data)
-{
- vu_long *addr = (vu_long*)(info->start[0]);
- ulong start;
- int flag;
-
- /* Check if Flash is (sufficiently) erased */
- if ((*((vu_long *)dest) & data) != data) {
- return (2);
- }
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
-
- addr[0x0555] = 0xAAAAAAAA;
- addr[0x02AA] = 0x55555555;
- addr[0x0555] = 0xA0A0A0A0;
-
- *((vu_long *)dest) = data;
-
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
-
- /* data polling for D7 */
- start = get_timer (0);
- while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
- if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- return (1);
- }
- }
- return (0);
-}
-
-/*-----------------------------------------------------------------------
- */
projects / karo-tx-uboot.git / blobdiff