diff options
Diffstat (limited to 'board/eltec/bab7xx/flash.c')
| -rw-r--r-- | board/eltec/bab7xx/flash.c | 512 |
1 files changed, 0 insertions, 512 deletions
diff --git a/board/eltec/bab7xx/flash.c b/board/eltec/bab7xx/flash.c deleted file mode 100644 index 21ae09892..000000000 --- a/board/eltec/bab7xx/flash.c +++ /dev/null @@ -1,512 +0,0 @@ -/* - * (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 - */ - -/* - * 07-10-2002 Frank Gottschling: added 29F032 flash (ELPPC). - * fixed monitor protection part - * - * 09-18-2001 Andreas Heppel: Reduced the code in here to the usage - * of AMD's 29F040 and 29F016 flashes, since the BAB7xx does use - * any other. - */ - -#include <common.h> -#include <asm/processor.h> -#include <asm/pci_io.h> - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ - -ulong flash_get_size (vu_long *addr, flash_info_t *info); -static int write_word (flash_info_t *info, ulong dest, ulong data); - -/*flash command address offsets*/ - -#define ADDR0 (0x555) -#define ADDR1 (0x2AA) -#define ADDR3 (0x001) - -#define FLASH_WORD_SIZE unsigned char - -/*----------------------------------------------------------------------------*/ - -unsigned long flash_init (void) -{ - unsigned long size1, size2; - int i; - - /* Init: no FLASHes known */ - for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) - { - flash_info[i].flash_id = FLASH_UNKNOWN; - } - - /* initialise 1st flash */ - size1 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); - - if (flash_info[0].flash_id == FLASH_UNKNOWN) - { - printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", - size1, size1<<20); - } - - /* initialise 2nd flash */ - size2 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]); - - if (flash_info[1].flash_id == FLASH_UNKNOWN) - { - printf ("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", - size2, size2<<20); - } - - /* monitor protection ON by default */ - if (size1 == 512*1024) - { - (void)flash_protect(FLAG_PROTECT_SET, - FLASH_BASE0_PRELIM, - FLASH_BASE0_PRELIM+monitor_flash_len-1, - &flash_info[0]); - } - if (size2 == 512*1024) - { - (void)flash_protect(FLAG_PROTECT_SET, - FLASH_BASE1_PRELIM, - FLASH_BASE1_PRELIM+monitor_flash_len-1, - &flash_info[1]); - } - if (size2 == 4*1024*1024) - { - (void)flash_protect(FLAG_PROTECT_SET, - CONFIG_SYS_FLASH_BASE, - CONFIG_SYS_FLASH_BASE+monitor_flash_len-1, - &flash_info[1]); - } - - return (size1 + size2); -} - -/*----------------------------------------------------------------------------*/ - -void flash_print_info (flash_info_t *info) -{ - int i; - int k; - int size; - int erased; - volatile unsigned long *flash; - - if (info->flash_id == FLASH_UNKNOWN) { - printf ("missing or unknown FLASH type\n"); - flash_init(); - } - - 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 AMD_ID_F040B: - printf ("AM29F040B (4 Mbit)\n"); - break; - case AMD_ID_F016D: - printf ("AM29F016D (16 Mbit)\n"); - break; - case AMD_ID_F032B: - printf ("AM29F032B (32 Mbit)\n"); - break; - default: - printf ("Unknown Chip Type\n"); - break; - } - - if (info->size >= (1 << 20)) { - printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count); - } else { - printf (" Size: %ld kB in %d Sectors\n", info->size >> 10, info->sector_count); - } - - printf (" Sector Start Addresses:"); - for (i=0; i<info->sector_count; ++i) { - /* - * Check if whole sector is erased - */ - if (i != (info->sector_count-1)) - size = info->start[i+1] - info->start[i]; - else - size = info->start[0] + info->size - info->start[i]; - - erased = 1; - flash = (volatile unsigned long *)info->start[i]; - size = size >> 2; /* divide by 4 for longword access */ - for (k=0; k<size; k++) { - if (*flash++ != 0xffffffff) { - erased = 0; - break; - } - } - - if ((i % 5) == 0) - printf ("\n "); - - printf (" %08lX%s%s", - info->start[i], - erased ? " E" : " ", - info->protect[i] ? "RO " : " "); - } - printf ("\n"); -} - -/*----------------------------------------------------------------------------*/ -/* - * The following code cannot be run from FLASH! - */ -ulong flash_get_size (vu_long *addr, flash_info_t *info) -{ - short i; - ulong vendor, devid; - ulong base = (ulong)addr; - volatile unsigned char *caddr = (unsigned char *)addr; - -#ifdef DEBUG - printf("flash_get_size for address 0x%lx: \n", (unsigned long)caddr); -#endif - - /* Write auto select command: read Manufacturer ID */ - caddr[0] = 0xF0; /* reset bank */ - udelay(10); - - eieio(); - caddr[0x555] = 0xAA; - udelay(10); - caddr[0x2AA] = 0x55; - udelay(10); - caddr[0x555] = 0x90; - - udelay(10); - - vendor = caddr[0]; - devid = caddr[1]; - -#ifdef DEBUG - printf("Manufacturer: 0x%lx\n", vendor); -#endif - - vendor &= 0xff; - devid &= 0xff; - - /* We accept only two AMD types */ - switch (vendor) { - case (FLASH_WORD_SIZE)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 */ - } - - switch (devid) { - case (FLASH_WORD_SIZE)AMD_ID_F040B: - info->flash_id |= AMD_ID_F040B; - info->sector_count = 8; - info->size = 0x00080000; - break; /* => 0.5 MB */ - - case (FLASH_WORD_SIZE)AMD_ID_F016D: - info->flash_id |= AMD_ID_F016D; - info->sector_count = 32; - info->size = 0x00200000; - break; /* => 2 MB */ - - case (FLASH_WORD_SIZE)AMD_ID_F032B: - info->flash_id |= AMD_ID_F032B; - info->sector_count = 64; - info->size = 0x00400000; - break; /* => 4 MB */ - - default: - info->flash_id = FLASH_UNKNOWN; - return (0); /* => no or unknown flash */ - - } - -#ifdef DEBUG - printf("flash id 0x%lx; sector count 0x%x, size 0x%lx\n", info->flash_id, info->sector_count, info->size); -#endif - - /* check for protected sectors */ - for (i = 0; i < info->sector_count; i++) { - /* sector base address */ - info->start[i] = base + i * (info->size / info->sector_count); - /* read sector protection at sector address, (A7 .. A0) = 0x02 */ - /* D0 = 1 if protected */ - caddr = (volatile unsigned char *)(info->start[i]); - info->protect[i] = caddr[2] & 1; - } - - /* - * Prevent writes to uninitialized FLASH. - */ - if (info->flash_id != FLASH_UNKNOWN) { - caddr = (volatile unsigned char *)info->start[0]; - caddr[0] = 0xF0; /* reset bank */ - } - - return (info->size); -} - -/*----------------------------------------------------------------------------*/ - -int flash_erase (flash_info_t *info, int s_first, int s_last) -{ - volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]); - int flag, prot, sect, l_sect; - ulong start, now, last; - int rc = 0; - - 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 - aborted\n"); - 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[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080; - addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - - /* Start erase on unprotected sectors */ - for (sect = s_first; sect<=s_last; sect++) { - if (info->protect[sect] == 0) { /* not protected */ - addr = (FLASH_WORD_SIZE *)(info->start[sect]); - if (info->flash_id & FLASH_MAN_SST) { - addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080; - addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */ - udelay(30000); /* wait 30 ms */ - } - else - addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */ - 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 = (FLASH_WORD_SIZE *)(info->start[l_sect]); - while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) { - 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 */ - serial_putc ('.'); - last = now; - } - } - -DONE: - /* reset to read mode */ - addr = (FLASH_WORD_SIZE *)info->start[0]; - addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ - - printf (" done\n"); - return rc; -} - -/*----------------------------------------------------------------------------*/ -/* - * 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) -{ - volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]); - volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest; - volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data; - ulong start; - int flag; - int i; - - /* Check if Flash is (sufficiently) erased */ - if ((*((volatile FLASH_WORD_SIZE *)dest) & - (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) { - return (2); - } - /* Disable interrupts which might cause a timeout here */ - flag = disable_interrupts(); - - for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++) - { - addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; - addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055; - addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0; - - dest2[i] = data2[i]; - - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts(); - - /* data polling for D7 */ - start = get_timer (0); - while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != - (data2[i] & (FLASH_WORD_SIZE)0x00800080)) { - if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { - return (1); - } - } - } - - return (0); -} - -/*----------------------------------------------------------------------------*/ |