mirror of
https://github.com/smaeul/u-boot.git
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278 lines
6.0 KiB
C
278 lines
6.0 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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* Hacked for the Hymod board by Murray.Jensen@cmst.csiro.au, 20-Oct-00
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#include <galileo/gt64260R.h>
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#include <galileo/memory.h>
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#include "intel_flash.h"
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/*-----------------------------------------------------------------------
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* Protection Flags:
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*/
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#define FLAG_PROTECT_SET 0x01
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#define FLAG_PROTECT_CLEAR 0x02
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static void
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bank_reset(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, eaddrw;
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addrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(addrw);
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while (addrw < eaddrw) {
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#ifdef FLASH_DEBUG
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printf(" writing reset cmd to addr 0x%08lx\n",
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(unsigned long)addrw);
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#endif
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*addrw = BANK_CMD_RST;
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addrw++;
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}
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}
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static void
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bank_erase_init(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, saddrw, eaddrw;
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int flag;
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#ifdef FLASH_DEBUG
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printf("0x%08x BANK_CMD_PROG\n", BANK_CMD_PROG);
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printf("0x%08x BANK_CMD_ERASE1\n", BANK_CMD_ERASE1);
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printf("0x%08x BANK_CMD_ERASE2\n", BANK_CMD_ERASE2);
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printf("0x%08x BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT);
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printf("0x%08x BANK_CMD_RST\n", BANK_CMD_RST);
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printf("0x%08x BANK_STAT_RDY\n", BANK_STAT_RDY);
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printf("0x%08x BANK_STAT_ERR\n", BANK_STAT_ERR);
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#endif
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saddrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
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#ifdef FLASH_DEBUG
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printf("erasing sector %d, start addr = 0x%08lx "
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"(bank next word addr = 0x%08lx)\n", sect,
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(unsigned long)saddrw, (unsigned long)eaddrw);
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#endif
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/* Disable intrs which might cause a timeout here */
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flag = disable_interrupts();
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for (addrw = saddrw; addrw < eaddrw; addrw++) {
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#ifdef FLASH_DEBUG
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printf(" writing erase cmd to addr 0x%08lx\n",
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(unsigned long)addrw);
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#endif
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*addrw = BANK_CMD_ERASE1;
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*addrw = BANK_CMD_ERASE2;
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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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}
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static int
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bank_erase_poll(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, saddrw, eaddrw;
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int sectdone, haderr;
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saddrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
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sectdone = 1;
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haderr = 0;
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for (addrw = saddrw; addrw < eaddrw; addrw++) {
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bank_word_t stat = *addrw;
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#ifdef FLASH_DEBUG
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printf(" checking status at addr "
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"0x%08x [0x%08x]\n",
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(unsigned long)addrw, stat);
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#endif
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if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY)
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sectdone = 0;
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else if ((stat & BANK_STAT_ERR) != 0) {
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printf(" failed on sector %d "
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"(stat = 0x%08x) at "
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"address 0x%p\n",
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sect, stat, addrw);
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*addrw = BANK_CMD_CLR_STAT;
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haderr = 1;
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}
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}
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if (haderr)
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return (-1);
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else
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return (sectdone);
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}
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int
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write_word_intel(bank_addr_t addr, bank_word_t value)
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{
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bank_word_t stat;
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ulong start;
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int flag, retval;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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*addr = BANK_CMD_PROG;
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*addr = value;
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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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retval = 0;
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/* data polling for D7 */
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start = get_timer (0);
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do {
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
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retval = 1;
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goto done;
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}
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stat = *addr;
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} while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY);
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if ((stat & BANK_STAT_ERR) != 0) {
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printf("flash program failed (stat = 0x%08lx) "
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"at address 0x%08lx\n", (ulong)stat, (ulong)addr);
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*addr = BANK_CMD_CLR_STAT;
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retval = 3;
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}
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done:
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/* reset to read mode */
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*addr = BANK_CMD_RST;
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return (retval);
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}
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/*-----------------------------------------------------------------------
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*/
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int
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flash_erase_intel(flash_info_t *info, int s_first, int s_last)
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{
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int prot, sect, haderr;
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ulong start, now, last;
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#ifdef FLASH_DEBUG
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printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
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" Bank # %d: ", s_last - s_first + 1, s_first, s_last,
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(info - flash_info) + 1);
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flash_print_info(info);
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#endif
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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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}
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if (prot) {
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printf("- Warning: %d protected sector%s will not be erased!\n",
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prot, (prot > 1 ? "s" : ""));
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}
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start = get_timer (0);
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last = 0;
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haderr = 0;
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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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ulong estart;
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int sectdone;
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bank_erase_init(info, sect);
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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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estart = get_timer(start);
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do {
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now = get_timer(start);
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if (now - estart > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout (sect %d)\n", sect);
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haderr = 1;
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break;
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}
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#ifndef FLASH_DEBUG
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/* show that we're waiting */
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if ((now - last) > 1000) { /* every second */
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putc ('.');
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last = now;
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}
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#endif
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sectdone = bank_erase_poll(info, sect);
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if (sectdone < 0) {
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haderr = 1;
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break;
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}
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} while (!sectdone);
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if (haderr)
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break;
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}
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}
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if (haderr > 0)
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printf (" failed\n");
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else
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printf (" done\n");
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/* reset to read mode */
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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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bank_reset(info, sect);
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}
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}
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return haderr;
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}
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