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403 lines
10 KiB
C
403 lines
10 KiB
C
/*
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* (C) Copyright 2000
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* Marius Groeger <mgroeger@sysgo.de>
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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*
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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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* Flash Routines for AM290[48]0B devices
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*
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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 <mpc8xx.h>
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/* flash hardware ids */
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#define VENDOR_AMD 0x0001
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#define AMD_29DL323C_B 0x2253
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/* Define this to include autoselect sequence in flash_init(). Does NOT
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* work when executing from flash itself, so this should be turned
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* on only when debugging the RAM version.
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*/
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#undef WITH_AUTOSELECT
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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#if 1
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#define D(x)
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#else
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#define D(x) printf x
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#endif
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static unsigned char write_ull(flash_info_t *info,
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unsigned long address,
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volatile unsigned long long data);
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/* from flash_asm.S */
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extern void ull_write(unsigned long long volatile *address,
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unsigned long long volatile *data);
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extern void ull_read(unsigned long long volatile *address,
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unsigned long long volatile *data);
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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 addr;
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#ifdef WITH_AUTOSELECT
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{
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unsigned long long *f_addr = (unsigned long long *)PHYS_FLASH;
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unsigned long long f_command, vendor, device;
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/* Perform Autoselect */
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f_command = 0x00AA00AA00AA00AAULL;
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ull_write(&f_addr[0x555], &f_command);
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f_command = 0x0055005500550055ULL;
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ull_write(&f_addr[0x2AA], &f_command);
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f_command = 0x0090009000900090ULL;
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ull_write(&f_addr[0x555], &f_command);
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ull_read(&f_addr[0], &vendor);
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vendor &= 0xffff;
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ull_read(&f_addr[1], &device);
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device &= 0xffff;
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f_command = 0x00F000F000F000F0ULL;
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ull_write(&f_addr[0x555], &f_command);
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if (vendor != VENDOR_AMD || device != AMD_29DL323C_B)
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return 0;
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}
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#endif
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* 1st bank: 8 x 32 KB sectors */
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flash_info[0].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
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flash_info[0].sector_count = 8;
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flash_info[0].size = flash_info[0].sector_count * 32 * 1024;
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addr = PHYS_FLASH;
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for(i = 0; i < flash_info[0].sector_count; i++) {
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flash_info[0].start[i] = addr;
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addr += flash_info[0].size / flash_info[0].sector_count;
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}
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/* 1st bank: 63 x 256 KB sectors */
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flash_info[1].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
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flash_info[1].sector_count = 63;
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flash_info[1].size = flash_info[1].sector_count * 256 * 1024;
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for(i = 0; i < flash_info[1].sector_count; i++) {
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flash_info[1].start[i] = addr;
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addr += flash_info[1].size / flash_info[1].sector_count;
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}
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/*
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* protect monitor and environment sectors
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*/
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#if CONFIG_SYS_MONITOR_BASE >= PHYS_FLASH
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[0]);
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[1]);
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#endif
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#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
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&flash_info[0]);
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
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&flash_info[1]);
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#endif
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return flash_info[0].size + flash_info[1].size;
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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 >> 16) {
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case VENDOR_AMD:
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printf ("AMD ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case AMD_29DL323C_B:
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printf ("AM29DL323CB (32 Mbit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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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],
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info->protect[i] ? " (RO)" : " "
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);
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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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*/
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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, l_sect;
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ulong start;
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unsigned long long volatile *f_addr;
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unsigned long long volatile f_command;
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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 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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f_addr = (unsigned long long *)info->start[0];
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f_command = 0x00AA00AA00AA00AAULL;
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ull_write(&f_addr[0x555], &f_command);
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f_command = 0x0055005500550055ULL;
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ull_write(&f_addr[0x2AA], &f_command);
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f_command = 0x0080008000800080ULL;
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ull_write(&f_addr[0x555], &f_command);
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f_command = 0x00AA00AA00AA00AAULL;
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ull_write(&f_addr[0x555], &f_command);
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f_command = 0x0055005500550055ULL;
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ull_write(&f_addr[0x2AA], &f_command);
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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 (l_sect = -1, sect = s_first; sect<=s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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f_addr =
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(unsigned long long *)(info->start[sect]);
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f_command = 0x0030003000300030ULL;
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ull_write(f_addr, &f_command);
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l_sect = sect;
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}
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}
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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start = get_timer (0);
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do
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{
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if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT)
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{ /* write reset command, command address is unimportant */
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/* this command turns the flash back to read mode */
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f_addr =
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(unsigned long long *)(info->start[l_sect]);
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f_command = 0x00F000F000F000F0ULL;
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ull_write(f_addr, &f_command);
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printf (" timeout\n");
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return 1;
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}
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} while(*f_addr != 0xFFFFFFFFFFFFFFFFULL);
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printf (" done\n");
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return 0;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
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{
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unsigned long cp, wp;
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unsigned long long data;
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int i, l, rc;
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wp = (addr & ~7); /* get lower long long aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ((l = addr - wp) != 0) {
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data = 0;
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for (i=0, cp=wp; i<l; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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for (; i<8 && 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<8; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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if ((rc = write_ull(info, wp, data)) != 0) {
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return rc;
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}
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wp += 4;
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}
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/*
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* handle long long aligned part
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*/
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while (cnt >= 8) {
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data = 0;
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for (i=0; i<8; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_ull(info, wp, data)) != 0) {
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return rc;
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}
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wp += 8;
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cnt -= 8;
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}
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if (cnt == 0) {
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return ERR_OK;
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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<8 && 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<8; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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return write_ull(info, wp, data);
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}
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/*---------------------------------------------------------------------------
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*
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* FUNCTION NAME: write_ull
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*
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* DESCRIPTION: writes 8 bytes to flash
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*
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* EXTERNAL EFFECT: nothing
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*
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* PARAMETERS: 32 bit long pointer to address, 64 bit long pointer to data
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*
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* RETURNS: 0 if OK, 1 if timeout, 4 if parameter error
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*--------------------------------------------------------------------------*/
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static unsigned char write_ull(flash_info_t *info,
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unsigned long address,
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volatile unsigned long long data)
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{
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static unsigned long long f_command;
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static unsigned long long *f_addr;
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ulong start;
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/* address muss be 8-aligned! */
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if (address & 0x7)
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return ERR_ALIGN;
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f_addr = (unsigned long long *)info->start[0];
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f_command = 0x00AA00AA00AA00AAULL;
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ull_write(&f_addr[0x555], &f_command);
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f_command = 0x0055005500550055ULL;
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ull_write(&f_addr[0x2AA], &f_command);
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f_command = 0x00A000A000A000A0ULL;
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ull_write(&f_addr[0x555], &f_command);
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f_addr = (unsigned long long *)address;
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f_command = data;
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ull_write(f_addr, &f_command);
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start = get_timer (0);
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do
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{
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if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
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{
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/* write reset command, command address is unimportant */
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/* this command turns the flash back to read mode */
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f_addr = (unsigned long long *)info->start[0];
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f_command = 0x00F000F000F000F0ULL;
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ull_write(f_addr, &f_command);
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return ERR_TIMOUT;
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}
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} while(*((unsigned long long *)address) != data);
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return 0;
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}
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