/* * (C) Copyright 2001, 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2002 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG * * Flash Routines for AMD device AM29DL323DB on the EP8260 board. * * This file is based on board/tqm8260/flash.c. *-------------------------------------------------------------------- * 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> #define V_ULONG(a) (*(volatile unsigned long *)( a )) #define V_BYTE(a) (*(volatile unsigned char *)( a )) flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /*----------------------------------------------------------------------- */ void flash_reset(void) { if( flash_info[0].flash_id != FLASH_UNKNOWN ) { V_ULONG( flash_info[0].start[0] ) = 0x00F000F0; V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0; } } /*----------------------------------------------------------------------- */ ulong flash_get_size( ulong baseaddr, flash_info_t *info ) { short i; unsigned long flashtest_h, flashtest_l; /* Write auto select command sequence and test FLASH answer */ V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA; V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055; V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090; V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA; V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055; V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090; flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */ flashtest_l = V_ULONG(baseaddr + 4); if ((int)flashtest_h == AMD_MANUFACT) { info->flash_id = FLASH_MAN_AMD; } else { info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* no or unknown flash */ } flashtest_h = V_ULONG(baseaddr + 8); /* device ID */ flashtest_l = V_ULONG(baseaddr + 12); if (flashtest_h != flashtest_l) { info->flash_id = FLASH_UNKNOWN; return(0); } switch((int)flashtest_h) { case AMD_ID_DL323B: info->flash_id += FLASH_AMDL323B; info->sector_count = 71; info->size = 0x01000000; /* 4 * 4 MB = 16 MB */ break; case AMD_ID_LV640U: /* AMDLV640 and AMDLV641 have same ID */ info->flash_id += FLASH_AMLV640U; info->sector_count = 128; info->size = 0x02000000; /* 4 * 8 MB = 32 MB */ break; default: info->flash_id = FLASH_UNKNOWN; return(0); /* no or unknown flash */ } if(flashtest_h == AMD_ID_LV640U) { /* set up sector start adress table (uniform sector type) */ for (i = 0; i < info->sector_count; i++) info->start[i] = baseaddr + (i * 0x00040000); } else { /* set up sector start adress table (bottom sector type) */ for (i = 0; i < 8; i++) { info->start[i] = baseaddr + (i * 0x00008000); } for (i = 8; i < info->sector_count; i++) { info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000; } } /* check for protected sectors */ for (i = 0; i < info->sector_count; i++) { /* read sector protection at sector address, (A7 .. A0) = 0x02 */ if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) || (V_ULONG( info->start[i] + 20 ) & 0x00010001)) { info->protect[i] = 1; /* D0 = 1 if protected */ } else { info->protect[i] = 0; } } flash_reset(); return(info->size); } /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long size_b0 = 0; int i; /* Init: no FLASHes known */ for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* Static FLASH Bank configuration here (only one bank) */ size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]); if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) { printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size_b0, size_b0>>20); } /* * protect monitor and environment sectors */ #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, &flash_info[0]); #endif #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) # ifndef CONFIG_ENV_SIZE # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE # endif flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); #endif return (size_b0); } /*----------------------------------------------------------------------- */ 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 FLASH_MAN_AMD: printf ("AMD "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n"); break; case FLASH_AMLV640U: printf ("29LV640U (64 M, uniform sector)\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; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { 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(); V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080; V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080; V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; udelay (1000); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ V_ULONG( info->start[sect] ) = 0x00300030; V_ULONG( info->start[sect] + 4 ) = 0x00300030; 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; while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 || (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 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 */ flash_reset (); printf (" done\n"); return 0; } static int write_dword (flash_info_t *, ulong, unsigned char *); /*----------------------------------------------------------------------- * 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 dp; static unsigned char bb[8]; int i, l, rc, cc = cnt; dp = (addr & ~7); /* get lower dword aligned address */ /* * handle unaligned start bytes */ if ((l = addr - dp) != 0) { for (i = 0; i < 8; i++) bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++; if ((rc = write_dword(info, dp, bb)) != 0) { return (rc); } dp += 8; cc -= 8 - l; } /* * handle word aligned part */ while (cc >= 8) { if ((rc = write_dword(info, dp, src)) != 0) { return (rc); } dp += 8; src += 8; cc -= 8; } if (cc <= 0) { return (0); } /* * handle unaligned tail bytes */ for (i = 0; i < 8; i++) { bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i); } return (write_dword(info, dp, bb)); } /*----------------------------------------------------------------------- * Write a dword to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata) { ulong start; ulong cl = 0, ch =0; int flag, i; for (ch=0, i=0; i < 4; i++) ch = (ch << 8) + *pdata++; /* high word */ for (cl=0, i=0; i < 4; i++) cl = (cl << 8) + *pdata++; /* low word */ /* Check if Flash is (sufficiently) erased */ if ((*((vu_long *)dest) & ch) != ch ||(*((vu_long *)(dest + 4)) & cl) != cl) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0; V_ULONG( dest ) = ch; V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0; V_ULONG( dest + 4 ) = cl; /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) || ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) { if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { return (1); } } return (0); }