441 lines
9.7 KiB
C
441 lines
9.7 KiB
C
/*
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* (C) Copyright 2001
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* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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*
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* (C) Copyright 2001
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* 2003 (c) MontaVista Software, Inc.
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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 <linux/byteorder/swab.h>
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/* Board support for 1 or 2 flash devices */
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#define FLASH_PORT_WIDTH32
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#undef FLASH_PORT_WIDTH16
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#ifdef FLASH_PORT_WIDTH16
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#define FLASH_PORT_WIDTH ushort
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#define FLASH_PORT_WIDTHV vu_short
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#define SWAP(x) __swab16(x)
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#else
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#define FLASH_PORT_WIDTH ulong
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#define FLASH_PORT_WIDTHV vu_long
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#define SWAP(x) __swab32(x)
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#endif
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#define FPW FLASH_PORT_WIDTH
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#define FPWV FLASH_PORT_WIDTHV
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#define mb() __asm__ __volatile__ ("" : : : "memory")
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size(FPW * addr, flash_info_t * info);
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static int write_data(flash_info_t * info, ulong dest, FPW data);
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static void flash_get_offsets(ulong base, flash_info_t * info);
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void inline spin_wheel(void);
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/*-----------------------------------------------------------------------
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*/
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unsigned long
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flash_init(void)
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{
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int i;
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ulong size = 0;
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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switch (i) {
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case 0:
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flash_get_size((FPW *) PHYS_FLASH_1, &flash_info[i]);
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flash_get_offsets(PHYS_FLASH_1, &flash_info[i]);
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break;
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default:
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panic("configured too many flash banks!\n");
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break;
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}
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size += flash_info[i].size;
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}
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/* Protect monitor and environment sectors
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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 + monitor_flash_len - 1, &flash_info[0]);
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flash_protect(FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
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return size;
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}
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/*-----------------------------------------------------------------------
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*/
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static void
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flash_get_offsets(ulong base, 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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return;
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}
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
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info->protect[i] = 0;
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}
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}
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}
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/*-----------------------------------------------------------------------
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*/
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void
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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 & FLASH_VENDMASK) {
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case FLASH_MAN_INTEL:
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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_28F128J3A:
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printf("28F128J3A\n");
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break;
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case FLASH_28F640J5:
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printf("28F640J5\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], info->protect[i] ? " (RO)" : " ");
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}
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printf("\n");
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return;
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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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static ulong
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flash_get_size(FPW * addr, flash_info_t * info)
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{
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volatile FPW value;
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/* Write auto select command: read Manufacturer ID */
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addr[0x5555] = (FPW) 0x00AA00AA;
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addr[0x2AAA] = (FPW) 0x00550055;
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addr[0x5555] = (FPW) 0x00900090;
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mb();
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value = addr[0];
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switch (value) {
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case (FPW) INTEL_MANUFACT:
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info->flash_id = FLASH_MAN_INTEL;
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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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addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
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return (0); /* no or unknown flash */
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}
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mb();
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value = addr[1]; /* device ID */
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switch (value) {
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case (FPW) INTEL_ID_28F128J3A:
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 0x02000000;
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break; /* => 16 MB */
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case (FPW) INTEL_ID_28F640J5:
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info->flash_id += FLASH_28F640J5;
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info->sector_count = 64;
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info->size = 0x01000000;
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break; /* => 16 MB */
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default:
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info->flash_id = FLASH_UNKNOWN;
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break;
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}
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if (info->sector_count > CFG_MAX_FLASH_SECT) {
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printf("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CFG_MAX_FLASH_SECT);
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info->sector_count = CFG_MAX_FLASH_SECT;
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}
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addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
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return (info->size);
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}
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/*-----------------------------------------------------------------------
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*/
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int
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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 type, start, last;
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int rcode = 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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type = (info->flash_id & FLASH_VENDMASK);
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if ((type != FLASH_MAN_INTEL)) {
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printf("Can't erase unknown flash type %08lx - aborted\n",
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info->flash_id);
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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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start = get_timer(0);
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last = start;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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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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FPWV *addr = (FPWV *) (info->start[sect]);
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FPW status;
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printf("Erasing sector %2d ... ", sect);
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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*addr = (FPW) 0x00500050; /* clear status register */
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*addr = (FPW) 0x00200020; /* erase setup */
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*addr = (FPW) 0x00D000D0; /* erase confirm */
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while (((status =
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*addr) & (FPW) 0x00800080) !=
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(FPW) 0x00800080) {
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if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
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printf("Timeout\n");
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*addr = (FPW) 0x00B000B0; /* suspend erase */
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*addr = (FPW) 0x00FF00FF; /* reset to read mode */
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rcode = 1;
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break;
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}
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}
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*addr = (FPW) 0x00500050; /* clear status register cmd. */
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*addr = (FPW) 0x00FF00FF; /* resest to read mode */
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printf(" done\n");
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}
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}
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return rcode;
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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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* 4 - Flash not identified
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*/
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int
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write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong cp, wp;
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FPW data;
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int count, i, l, rc, port_width;
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if (info->flash_id == FLASH_UNKNOWN) {
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return 4;
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}
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/* get lower word aligned address */
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#ifdef FLASH_PORT_WIDTH16
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wp = (addr & ~1);
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port_width = 2;
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#else
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wp = (addr & ~3);
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port_width = 4;
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#endif
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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 < port_width && 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 < port_width; ++i, ++cp) {
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data = (data << 8) | (*(uchar *) cp);
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}
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if ((rc = write_data(info, wp, SWAP(data))) != 0) {
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return (rc);
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}
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wp += port_width;
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}
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/*
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* handle word aligned part
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*/
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count = 0;
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while (cnt >= port_width) {
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data = 0;
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for (i = 0; i < port_width; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_data(info, wp, SWAP(data))) != 0) {
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return (rc);
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}
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wp += port_width;
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cnt -= port_width;
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if (count++ > 0x800) {
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spin_wheel();
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count = 0;
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}
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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 < port_width && 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 < port_width; ++i, ++cp) {
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data = (data << 8) | (*(uchar *) cp);
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}
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return (write_data(info, wp, SWAP(data)));
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}
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/*-----------------------------------------------------------------------
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* Write a word or halfword 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
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write_data(flash_info_t * info, ulong dest, FPW data)
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{
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FPWV *addr = (FPWV *) dest;
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ulong status;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if ((*addr & data) != data) {
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printf("not erased at %08lX (%lX)\n", (ulong) addr, *addr);
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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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*addr = (FPW) 0x00400040; /* write setup */
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*addr = data;
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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/* wait while polling the status register */
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while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
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if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
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*addr = (FPW) 0x00FF00FF; /* restore read mode */
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return (1);
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}
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}
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*addr = (FPW) 0x00FF00FF; /* restore read mode */
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return (0);
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}
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void inline
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spin_wheel(void)
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{
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static int p = 0;
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static char w[] = "\\/-";
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printf("\010%c", w[p]);
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(++p == 3) ? (p = 0) : 0;
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}
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