/* * (C) Copyright 2000 * Marius Groeger <mgroeger@sysgo.de> * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Flash Routines for AMD 29F080B devices * *-------------------------------------------------------------------- * 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[CFG_MAX_FLASH_BANKS]; /*----------------------------------------------------------------------- * 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); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long size; int i; /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* for now, only support the 4 MB Flash SIMM */ size = flash_get_size((vu_long *)CFG_FLASH0_BASE, &flash_info[0]); /* * protect monitor and environment sectors */ #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE+monitor_flash_len-1, &flash_info[0]); #endif #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) # ifndef CFG_ENV_SIZE # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE # endif flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); #endif return /*size*/ (CFG_FLASH0_SIZE * 1024 * 1024); } /*----------------------------------------------------------------------- */ 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 >> 16) & 0xff) { case 0x1: 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_F080B: printf ("AM29F080B (8 Mbit)\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"); return; } /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (vu_long *addr, flash_info_t *info) { short i; vu_long vendor, devid; ulong base = (ulong)addr; /* printf("addr = %08lx\n", (unsigned long)addr); */ /* Reset and Write auto select command: read Manufacturer ID */ addr[0] = 0xf0f0f0f0; addr[0x0555] = 0xAAAAAAAA; addr[0x02AA] = 0x55555555; addr[0x0555] = 0x90909090; udelay (1000); vendor = addr[0]; /* printf("vendor = %08lx\n", vendor); */ if (vendor != 0x01010101) { info->size = 0; goto out; } devid = addr[1]; /* printf("devid = %08lx\n", devid); */ if ((devid & 0xff) == AMD_ID_F080B) { info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F080B; /* we have 16 sectors with 64KB each x 4 */ info->sector_count = 16; info->size = 4 * info->sector_count * 64*1024; } else { info->size = 0; goto out; } /* 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 */ addr = (volatile unsigned long *)(info->start[i]); info->protect[i] = addr[2] & 1; } /* reset command */ addr = (vu_long *)info->start[0]; out: addr[0] = 0xf0f0f0f0; 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; } 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[0x0555] = 0xAAAAAAAA; addr[0x02AA] = 0x55555555; addr[0x0555] = 0x80808080; addr[0x0555] = 0xAAAAAAAA; addr[0x02AA] = 0x55555555; udelay (100); /* 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)) > CFG_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 = (volatile unsigned 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[0x0555] = 0xAAAAAAAA; addr[0x02AA] = 0x55555555; addr[0x0555] = 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) > CFG_FLASH_WRITE_TOUT) { return (1); } } return (0); } /*----------------------------------------------------------------------- */