mirror of
https://github.com/AsahiLinux/u-boot
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409 lines
9.1 KiB
C
409 lines
9.1 KiB
C
/*
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* (C) Copyright 2005
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* Greg Ungerer, OpenGear Inc, greg.ungerer@opengear.com
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*
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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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* 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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#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 (unsigned char * addr, flash_info_t * info);
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static int write_data (flash_info_t * info, ulong dest, unsigned char 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 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 ((unsigned char *) 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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case 1:
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/* ignore for now */
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flash_info[i].flash_id = FLASH_UNKNOWN;
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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 + _bss_start - _armboot_start,
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&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 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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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 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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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 flash_get_size (unsigned char * addr, flash_info_t * info)
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{
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volatile unsigned char value;
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/* Write auto select command: read Manufacturer ID */
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addr[0x5555] = 0xAA;
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addr[0x2AAA] = 0x55;
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addr[0x5555] = 0x90;
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mb ();
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value = addr[0];
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switch (value) {
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case (unsigned char)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] = 0xFF; /* 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[2]; /* device ID */
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switch (value) {
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case (unsigned char)INTEL_ID_28F640J3A:
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info->flash_id += FLASH_28F640J3A;
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info->sector_count = 64;
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info->size = 0x00800000;
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break; /* => 8 MB */
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case (unsigned char)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 = 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] = 0xFF; /* 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 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;
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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", prot);
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else
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printf ("\n");
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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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volatile unsigned char *addr;
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unsigned char 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 = (volatile unsigned char *) (info->start[sect]);
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*addr = 0x50; /* clear status register */
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*addr = 0x20; /* erase setup */
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*addr = 0xD0; /* erase confirm */
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while (((status = *addr) & 0x80) != 0x80) {
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if (get_timer_masked () >
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CFG_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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*addr = 0xB0; /* suspend erase */
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*addr = 0xFF; /* 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 = 0x50; /* clear status register cmd */
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*addr = 0xFF; /* 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 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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unsigned char 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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wp = addr;
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port_width = 1;
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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, 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, 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, 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 write_data (flash_info_t * info, ulong dest, unsigned char data)
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{
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volatile unsigned char *addr = (volatile unsigned char *) 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,
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(ulong) * 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 = 0x40; /* 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) & 0x80) != 0x80) {
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if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
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*addr = 0xFF; /* restore read mode */
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return (1);
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}
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}
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*addr = 0xFF; /* restore read mode */
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return (0);
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}
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void inline 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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