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f7db33101f
currently sectors 0-3. Sector 3 does not need to be protected, though (U-boot occupies sectors 0-1 and the environment sector 2). This commit fixes this, i.e., only sectors 0-2 are protected.
357 lines
7.3 KiB
C
357 lines
7.3 KiB
C
/*
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* (C) Copyright 2000-2006
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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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#define PHYS_FLASH_1 CFG_FLASH_BASE
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#define FLASH_BANK_SIZE 0x800000
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#define EN29LV640 0x227e227e
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flash_info_t flash_info[CFG_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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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 (EN29LV640 & FLASH_TYPEMASK):
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printf ("EN29LV640 (16Mbit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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goto Done;
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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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}
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printf (" %08lX%s", info->start[i],
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info->protect[i] ? " (RO)" : " ");
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}
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printf ("\n");
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Done:
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return;
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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 < CFG_MAX_FLASH_BANKS; i++) {
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ulong flashbase = 0;
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flash_info[i].flash_id =
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(AMD_MANUFACT & FLASH_VENDMASK) |
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(EN29LV640 & FLASH_TYPEMASK);
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flash_info[i].size = FLASH_BANK_SIZE;
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flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
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memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
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if (i == 0)
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flashbase = PHYS_FLASH_1;
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else
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panic ("configured to many flash banks!\n");
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] = flashbase + 0x10000 * j;
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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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CFG_FLASH_BASE,
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CFG_FLASH_BASE + 0x2ffff, &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 *)(CFG_FLASH_BASE + (0x00000555<<1)))
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#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA<<1)))
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#define BIT_ERASE_DONE 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 READY 1
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#define ERR 2
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#define TMO 4
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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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ulong result;
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int iflag, prot, sect;
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int rc = ERR_OK;
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int chip1;
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/* first look for protection bits */
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if (info->flash_id == FLASH_UNKNOWN)
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return ERR_UNKNOWN_FLASH_TYPE;
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if ((s_first < 0) || (s_first > s_last)) {
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return ERR_INVAL;
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}
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if ((info->flash_id & FLASH_VENDMASK) !=
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(AMD_MANUFACT & FLASH_VENDMASK)) {
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return ERR_UNKNOWN_FLASH_VENDOR;
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}
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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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return ERR_PROTECTED;
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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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iflag = disable_interrupts ();
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printf ("\n");
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
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printf ("Erasing sector %2d ... ", sect);
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/* arm simple, non interrupt dependent timer */
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set_timer (0);
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if (info->protect[sect] == 0) { /* not protected */
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volatile u16 *addr =
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(volatile u16 *) (info->start[sect]);
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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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chip1 = 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) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) {
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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chip1 = TMO;
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break;
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}
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if (!chip1
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&& (result & 0xFFFF) & BIT_ERASE_DONE)
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chip1 = READY;
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} while (!chip1);
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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if (chip1 == ERR) {
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rc = ERR_PROG_ERROR;
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goto outahere;
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}
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if (chip1 == TMO) {
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rc = ERR_TIMOUT;
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goto outahere;
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}
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printf ("ok.\n");
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} else { /* it was protected */
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printf ("protected!\n");
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}
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}
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if (ctrlc ())
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printf ("User Interrupt!\n");
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outahere:
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/* allow flash to settle - wait 10 ms */
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printf("Waiting 10 ms...");
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udelay (10000);
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/* for (i = 0; i < 10 * 1000 * 1000; ++i)
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asm(" nop");
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*/
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printf("done\n");
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if (iflag)
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enable_interrupts ();
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return rc;
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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 u16 *addr = (volatile u16 *) dest;
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ulong result;
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int rc = ERR_OK;
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int iflag;
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int chip1;
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/*
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* Check if Flash is (sufficiently) erased
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*/
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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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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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chip1 = 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) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) {
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chip1 = ERR | TMO;
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break;
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}
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if (!chip1 && ((result & 0x80) == (data & 0x80)))
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chip1 = READY;
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} while (!chip1);
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*addr = CMD_READ_ARRAY;
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if (chip1 == ERR || *addr != data)
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rc = ERR_PROG_ERROR;
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if (iflag)
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enable_interrupts ();
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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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ulong wp, data;
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int rc;
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if (addr & 1) {
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printf ("unaligned destination not supported\n");
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return ERR_ALIGN;
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}
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#if 0
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if (cnt & 1) {
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printf ("odd transfer sizes not supported\n");
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return ERR_ALIGN;
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}
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#endif
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wp = addr;
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if (addr & 1) {
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data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
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src);
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if ((rc = write_word (info, wp - 1, data)) != 0) {
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return (rc);
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}
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src += 1;
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wp += 1;
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cnt -= 1;
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}
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while (cnt >= 2) {
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data = *((volatile u16 *) src);
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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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src += 2;
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wp += 2;
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cnt -= 2;
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}
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if (cnt == 1) {
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data = (*((volatile u8 *) src) << 8) |
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*((volatile u8 *) (wp + 1));
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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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src += 1;
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wp += 1;
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cnt -= 1;
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}
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return ERR_OK;
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}
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