| /* |
| * (C) Copyright 2001 |
| * Stäubli Faverges - <www.staubli.com> |
| * Pierre AUBERT p.aubert@staubli.com |
| * U-Boot port on RPXClassic LF (CLLF_BW31) board |
| * |
| * RPXClassic uses Am29DL323B flash memory with 2 banks |
| * |
| * |
| * (C) Copyright 2000 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| |
| #include <common.h> |
| #include <mpc8xx.h> |
| |
| flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
| |
| /*----------------------------------------------------------------------- |
| * Functions |
| */ |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info); |
| static int write_word (flash_info_t *info, ulong dest, ulong data); |
| static void flash_get_offsets (ulong base, flash_info_t *info); |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| unsigned long flash_init (void) |
| { |
| unsigned long size_b0 ; |
| int i; |
| |
| /* Init: no FLASHes known */ |
| for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
| flash_info[i].flash_id = FLASH_UNKNOWN; |
| } |
| |
| size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
| |
| |
| flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
| |
| #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE |
| /* monitor protection ON by default */ |
| flash_protect(FLAG_PROTECT_SET, |
| CONFIG_SYS_MONITOR_BASE, |
| CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, |
| &flash_info[0]); |
| #endif |
| |
| flash_info[0].size = size_b0; |
| |
| return (size_b0); |
| } |
| |
| /*----------------------------------------------------------------------- |
| */ |
| static void flash_get_offsets (ulong base, flash_info_t *info) |
| { |
| int i; |
| |
| if (info->flash_id & FLASH_BTYPE) { |
| /* set sector offsets for bottom boot block type */ |
| info->start[0] = base + 0x00000000; |
| info->start[1] = base + 0x00008000; |
| info->start[2] = base + 0x00010000; |
| info->start[3] = base + 0x00018000; |
| info->start[4] = base + 0x00020000; |
| info->start[5] = base + 0x00028000; |
| info->start[6] = base + 0x00030000; |
| info->start[7] = base + 0x00038000; |
| for (i = 8; i < info->sector_count; i++) { |
| info->start[i] = base + ((i-7) * 0x00040000) ; |
| } |
| } |
| } |
| |
| /*----------------------------------------------------------------------- |
| */ |
| void flash_print_info (flash_info_t *info) |
| { |
| int i; |
| |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("missing or unknown FLASH type\n"); |
| return; |
| } |
| |
| switch (info->flash_id & FLASH_VENDMASK) { |
| case FLASH_MAN_AMD: printf ("AMD "); break; |
| default: printf ("Unknown Vendor "); break; |
| } |
| |
| switch (info->flash_id & FLASH_TYPEMASK) { |
| case FLASH_AMDL323B: |
| printf ("AMDL323DB (16 Mbytes, bottom boot sect)\n"); |
| break; |
| default: |
| printf ("Unknown Chip Type\n"); |
| break; |
| } |
| |
| printf (" Size: %ld MB in %d Sectors\n", |
| info->size >> 20, info->sector_count); |
| |
| printf (" Sector Start Addresses:"); |
| for (i=0; i<info->sector_count; ++i) { |
| if ((i % 5) == 0) |
| printf ("\n "); |
| printf (" %08lX%s", |
| info->start[i], |
| info->protect[i] ? " (RO)" : " " |
| ); |
| } |
| printf ("\n"); |
| } |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| /* |
| * The following code cannot be run from FLASH! |
| */ |
| |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
| { |
| short i; |
| ulong value; |
| ulong base = (ulong)addr; |
| |
| /* Reset flash componeny */ |
| addr [0] = 0xf0f0f0f0; |
| |
| /* Write auto select command: read Manufacturer ID */ |
| addr[0xAAA] = 0xAAAAAAAA ; |
| addr[0x555] = 0x55555555 ; |
| addr[0xAAA] = 0x90909090 ; |
| |
| value = addr[0] ; |
| |
| switch (value & 0x00FF00FF) { |
| case AMD_MANUFACT: |
| info->flash_id = FLASH_MAN_AMD; |
| break; |
| default: |
| info->flash_id = FLASH_UNKNOWN; |
| info->sector_count = 0; |
| info->size = 0; |
| return (0); /* no or unknown flash */ |
| } |
| |
| value = addr[2] ; /* device ID */ |
| |
| switch (value & 0x00FF00FF) { |
| case (AMD_ID_DL323B & 0x00FF00FF): |
| info->flash_id += FLASH_AMDL323B; |
| info->sector_count = 71; |
| info->size = 0x01000000; /* 16 Mb */ |
| |
| break; |
| default: |
| info->flash_id = FLASH_UNKNOWN; |
| return (0); /* => no or unknown flash */ |
| |
| } |
| /* set up sector start address table */ |
| /* set sector offsets for bottom boot block type */ |
| info->start[0] = base + 0x00000000; |
| info->start[1] = base + 0x00008000; |
| info->start[2] = base + 0x00010000; |
| info->start[3] = base + 0x00018000; |
| info->start[4] = base + 0x00020000; |
| info->start[5] = base + 0x00028000; |
| info->start[6] = base + 0x00030000; |
| info->start[7] = base + 0x00038000; |
| for (i = 8; i < info->sector_count; i++) { |
| info->start[i] = base + ((i-7) * 0x00040000) ; |
| } |
| |
| /* check for protected sectors */ |
| for (i = 0; i < 23; i++) { |
| /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr = (volatile unsigned long *)(info->start[i]); |
| info->protect[i] = addr[4] & 1 ; |
| } |
| /* Check for protected sectors in the 2nd bank */ |
| addr[0x100AAA] = 0xAAAAAAAA ; |
| addr[0x100555] = 0x55555555 ; |
| addr[0x100AAA] = 0x90909090 ; |
| |
| for (i = 23; i < info->sector_count; i++) { |
| /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr = (volatile unsigned long *)(info->start[i]); |
| info->protect[i] = addr[4] & 1 ; |
| } |
| |
| /* |
| * Prevent writes to uninitialized FLASH. |
| */ |
| if (info->flash_id != FLASH_UNKNOWN) { |
| addr = (volatile unsigned long *)info->start[0]; |
| |
| *addr = 0xF0F0F0F0; /* reset bank 1 */ |
| addr = (volatile unsigned long *)info->start[23]; |
| |
| *addr = 0xF0F0F0F0; /* reset bank 2 */ |
| |
| } |
| |
| return (info->size); |
| } |
| |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| int flash_erase (flash_info_t *info, int s_first, int s_last) |
| { |
| vu_long *addr = (vu_long*)(info->start[0]); |
| int flag, prot, sect, l_sect; |
| ulong start, now, last; |
| |
| if ((s_first < 0) || (s_first > s_last)) { |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("- missing\n"); |
| } else { |
| printf ("- no sectors to erase\n"); |
| } |
| return 1; |
| } |
| |
| if ((info->flash_id == FLASH_UNKNOWN) || |
| (info->flash_id > FLASH_AMD_COMP)) { |
| printf ("Can't erase unknown flash type %08lx - aborted\n", |
| info->flash_id); |
| return 1; |
| } |
| |
| prot = 0; |
| for (sect=s_first; sect<=s_last; ++sect) { |
| if (info->protect[sect]) { |
| prot++; |
| } |
| } |
| |
| if (prot) { |
| printf ("- Warning: %d protected sectors will not be erased!\n", |
| prot); |
| } else { |
| printf ("\n"); |
| } |
| |
| l_sect = -1; |
| |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| addr[0xAAA] = 0xAAAAAAAA; |
| addr[0x555] = 0x55555555; |
| addr[0xAAA] = 0x80808080; |
| addr[0xAAA] = 0xAAAAAAAA; |
| addr[0x555] = 0x55555555; |
| |
| /* Start erase on unprotected sectors */ |
| for (sect = s_first; sect<=s_last; sect++) { |
| if (info->protect[sect] == 0) { /* not protected */ |
| addr = (vu_long *)(info->start[sect]) ; |
| addr[0] = 0x30303030 ; |
| l_sect = sect; |
| } |
| } |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* wait at least 80us - let's wait 1 ms */ |
| udelay (1000); |
| |
| /* |
| * We wait for the last triggered sector |
| */ |
| if (l_sect < 0) |
| goto DONE; |
| |
| start = get_timer (0); |
| last = start; |
| addr = (vu_long *)(info->start[l_sect]); |
| while ((addr[0] & 0x80808080) != 0x80808080) { |
| if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
| printf ("Timeout\n"); |
| return 1; |
| } |
| /* show that we're waiting */ |
| if ((now - last) > 1000) { /* every second */ |
| putc ('.'); |
| last = now; |
| } |
| } |
| |
| DONE: |
| /* reset to read mode */ |
| addr = (vu_long *)info->start[0]; |
| addr[0] = 0xF0F0F0F0; /* reset bank */ |
| |
| printf (" done\n"); |
| return 0; |
| } |
| |
| /*----------------------------------------------------------------------- |
| * Copy memory to flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| |
| int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| { |
| ulong cp, wp, data; |
| int i, l, rc; |
| |
| wp = (addr & ~3); /* get lower word aligned address */ |
| |
| /* |
| * handle unaligned start bytes |
| */ |
| if ((l = addr - wp) != 0) { |
| data = 0; |
| for (i=0, cp=wp; i<l; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| for (; i<4 && cnt>0; ++i) { |
| data = (data << 8) | *src++; |
| --cnt; |
| ++cp; |
| } |
| for (; cnt==0 && i<4; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| } |
| |
| /* |
| * handle word aligned part |
| */ |
| while (cnt >= 4) { |
| data = 0; |
| for (i=0; i<4; ++i) { |
| data = (data << 8) | *src++; |
| } |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| cnt -= 4; |
| } |
| |
| if (cnt == 0) { |
| return (0); |
| } |
| |
| /* |
| * handle unaligned tail bytes |
| */ |
| data = 0; |
| for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { |
| data = (data << 8) | *src++; |
| --cnt; |
| } |
| for (; i<4; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| return (write_word(info, wp, data)); |
| } |
| |
| /*----------------------------------------------------------------------- |
| * Write a word to Flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| static int write_word (flash_info_t *info, ulong dest, ulong data) |
| { |
| vu_long *addr = (vu_long *)(info->start[0]); |
| ulong start; |
| int flag; |
| |
| /* Check if Flash is (sufficiently) erased */ |
| if ((*((vu_long *)dest) & data) != data) { |
| return (2); |
| } |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| addr[0xAAA] = 0xAAAAAAAA; |
| addr[0x555] = 0x55555555; |
| addr[0xAAA] = 0xA0A0A0A0; |
| |
| *((vu_long *)dest) = data; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* data polling for D7 */ |
| start = get_timer (0); |
| while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) { |
| if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
| return (1); |
| } |
| } |
| return (0); |
| } |
| |
| /*----------------------------------------------------------------------- |
| */ |