mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
513 lines
12 KiB
C
513 lines
12 KiB
C
/*
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* (C) Copyright 2000
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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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/*
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* 07-10-2002 Frank Gottschling: added 29F032 flash (ELPPC).
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* fixed monitor protection part
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*
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* 09-18-2001 Andreas Heppel: Reduced the code in here to the usage
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* of AMD's 29F040 and 29F016 flashes, since the BAB7xx does use
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* any other.
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <asm/pci_io.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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ulong flash_get_size (vu_long *addr, flash_info_t *info);
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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/*flash command address offsets*/
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#define ADDR0 (0x555)
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#define ADDR1 (0x2AA)
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#define ADDR3 (0x001)
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#define FLASH_WORD_SIZE unsigned char
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/*----------------------------------------------------------------------------*/
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unsigned long flash_init (void)
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{
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unsigned long size1, size2;
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
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{
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* initialise 1st flash */
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size1 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN)
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{
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size1, size1<<20);
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}
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/* initialise 2nd flash */
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size2 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
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if (flash_info[1].flash_id == FLASH_UNKNOWN)
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{
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printf ("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
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size2, size2<<20);
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}
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/* monitor protection ON by default */
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if (size1 == 512*1024)
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{
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(void)flash_protect(FLAG_PROTECT_SET,
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FLASH_BASE0_PRELIM,
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FLASH_BASE0_PRELIM+monitor_flash_len-1,
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&flash_info[0]);
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}
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if (size2 == 512*1024)
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{
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(void)flash_protect(FLAG_PROTECT_SET,
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FLASH_BASE1_PRELIM,
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FLASH_BASE1_PRELIM+monitor_flash_len-1,
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&flash_info[1]);
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}
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if (size2 == 4*1024*1024)
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{
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(void)flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_FLASH_BASE,
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CONFIG_SYS_FLASH_BASE+monitor_flash_len-1,
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&flash_info[1]);
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}
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return (size1 + size2);
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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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int k;
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int size;
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int erased;
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volatile unsigned long *flash;
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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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flash_init();
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}
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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 & FLASH_VENDMASK) {
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case FLASH_MAN_AMD:
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printf ("AMD ");
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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 AMD_ID_F040B:
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printf ("AM29F040B (4 Mbit)\n");
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break;
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case AMD_ID_F016D:
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printf ("AM29F016D (16 Mbit)\n");
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break;
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case AMD_ID_F032B:
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printf ("AM29F032B (32 Mbit)\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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if (info->size >= (1 << 20)) {
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printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
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} else {
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printf (" Size: %ld kB in %d Sectors\n", info->size >> 10, info->sector_count);
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}
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printf (" Sector Start Addresses:");
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for (i=0; i<info->sector_count; ++i) {
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/*
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* Check if whole sector is erased
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*/
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if (i != (info->sector_count-1))
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size = info->start[i+1] - info->start[i];
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else
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size = info->start[0] + info->size - info->start[i];
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erased = 1;
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flash = (volatile unsigned long *)info->start[i];
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size = size >> 2; /* divide by 4 for longword access */
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for (k=0; k<size; k++) {
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if (*flash++ != 0xffffffff) {
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erased = 0;
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break;
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}
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}
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s%s",
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info->start[i],
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erased ? " E" : " ",
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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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/*
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* The following code cannot be run from FLASH!
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*/
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ulong flash_get_size (vu_long *addr, flash_info_t *info)
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{
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short i;
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ulong vendor, devid;
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ulong base = (ulong)addr;
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volatile unsigned char *caddr = (unsigned char *)addr;
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#ifdef DEBUG
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printf("flash_get_size for address 0x%lx: \n", (unsigned long)caddr);
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#endif
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/* Write auto select command: read Manufacturer ID */
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caddr[0] = 0xF0; /* reset bank */
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udelay(10);
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eieio();
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caddr[0x555] = 0xAA;
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udelay(10);
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caddr[0x2AA] = 0x55;
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udelay(10);
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caddr[0x555] = 0x90;
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udelay(10);
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vendor = caddr[0];
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devid = caddr[1];
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#ifdef DEBUG
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printf("Manufacturer: 0x%lx\n", vendor);
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#endif
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vendor &= 0xff;
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devid &= 0xff;
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/* We accept only two AMD types */
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switch (vendor) {
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case (FLASH_WORD_SIZE)AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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default:
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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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return (0); /* no or unknown flash */
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}
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switch (devid) {
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case (FLASH_WORD_SIZE)AMD_ID_F040B:
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info->flash_id |= AMD_ID_F040B;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 0.5 MB */
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case (FLASH_WORD_SIZE)AMD_ID_F016D:
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info->flash_id |= AMD_ID_F016D;
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info->sector_count = 32;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case (FLASH_WORD_SIZE)AMD_ID_F032B:
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info->flash_id |= AMD_ID_F032B;
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info->sector_count = 64;
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info->size = 0x00400000;
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break; /* => 4 MB */
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default:
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info->flash_id = FLASH_UNKNOWN;
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return (0); /* => no or unknown flash */
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}
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#ifdef DEBUG
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printf("flash id 0x%lx; sector count 0x%x, size 0x%lx\n", info->flash_id, info->sector_count, info->size);
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#endif
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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/* sector base address */
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info->start[i] = base + i * (info->size / info->sector_count);
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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caddr = (volatile unsigned char *)(info->start[i]);
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info->protect[i] = caddr[2] & 1;
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}
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/*
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* Prevent writes to uninitialized FLASH.
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*/
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if (info->flash_id != FLASH_UNKNOWN) {
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caddr = (volatile unsigned char *)info->start[0];
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caddr[0] = 0xF0; /* reset bank */
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}
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return (info->size);
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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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volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
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int flag, prot, sect, l_sect;
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ulong start, now, last;
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int rc = 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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}
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return 1;
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}
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if ((info->flash_id == FLASH_UNKNOWN) ||
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(info->flash_id > FLASH_AMD_COMP)) {
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printf ("Can't erase unknown flash type - aborted\n");
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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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}
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l_sect = -1;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
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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 = (FLASH_WORD_SIZE *)(info->start[sect]);
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if (info->flash_id & FLASH_MAN_SST) {
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
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addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
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addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
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udelay(30000); /* wait 30 ms */
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}
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else
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addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
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l_sect = sect;
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}
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}
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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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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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/*
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* We wait for the last triggered sector
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*/
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if (l_sect < 0)
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goto DONE;
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start = get_timer (0);
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last = start;
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addr = (FLASH_WORD_SIZE *)(info->start[l_sect]);
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while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
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if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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return 1;
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}
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/* show that we're waiting */
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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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DONE:
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/* reset to read mode */
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addr = (FLASH_WORD_SIZE *)info->start[0];
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addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
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printf (" done\n");
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return rc;
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}
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/*----------------------------------------------------------------------------*/
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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 cp, wp, data;
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int i, l, rc;
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wp = (addr & ~3); /* 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);
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}
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for (; i<4 && cnt>0; ++i) {
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data = (data << 8) | *src++;
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--cnt;
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++cp;
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}
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for (; cnt==0 && i<4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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if ((rc = write_word(info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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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 >= 4) {
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data = 0;
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for (i=0; i<4; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_word(info, wp, data)) != 0) {
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return (rc);
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}
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wp += 4;
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cnt -= 4;
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}
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if (cnt == 0) {
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return (0);
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}
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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<4 && cnt>0; ++i, ++cp) {
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data = (data << 8) | *src++;
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--cnt;
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}
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for (; i<4; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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return (write_word(info, wp, data));
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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, ulong dest, ulong data)
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{
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volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
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volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
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volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
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ulong start;
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int flag;
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int i;
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/* Check if Flash is (sufficiently) erased */
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if ((*((volatile FLASH_WORD_SIZE *)dest) &
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(FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
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return (2);
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}
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
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{
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addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
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addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
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addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
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dest2[i] = data2[i];
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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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/* data polling for D7 */
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start = get_timer (0);
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while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
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(data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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return (1);
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}
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}
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}
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return (0);
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}
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/*----------------------------------------------------------------------------*/
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