/* * (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); } /*----------------------------------------------------------------------------*/