/* * (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 AM290[48]0B 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 hardware ids */ #define VENDOR_AMD 0x0001 #define AMD_29DL323C_B 0x2253 /* Define this to include autoselect sequence in flash_init(). Does NOT * work when executing from flash itself, so this should be turned * on only when debugging the RAM version. */ #undef WITH_AUTOSELECT flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ #if 1 #define D(x) #else #define D(x) printf x #endif /*----------------------------------------------------------------------- * Functions */ static unsigned char write_ull(flash_info_t *info, unsigned long address, volatile unsigned long long data); /* from flash_asm.S */ extern void ull_write(unsigned long long volatile *address, unsigned long long volatile *data); extern void ull_read(unsigned long long volatile *address, unsigned long long volatile *data); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { int i; ulong addr; #ifdef WITH_AUTOSELECT { unsigned long long *f_addr = (unsigned long long *)PHYS_FLASH; unsigned long long f_command, vendor, device; /* Perform Autoselect */ f_command = 0x00AA00AA00AA00AAULL; ull_write(&f_addr[0x555], &f_command); f_command = 0x0055005500550055ULL; ull_write(&f_addr[0x2AA], &f_command); f_command = 0x0090009000900090ULL; ull_write(&f_addr[0x555], &f_command); ull_read(&f_addr[0], &vendor); vendor &= 0xffff; ull_read(&f_addr[1], &device); device &= 0xffff; f_command = 0x00F000F000F000F0ULL; ull_write(&f_addr[0x555], &f_command); if (vendor != VENDOR_AMD || device != AMD_29DL323C_B) return 0; } #endif /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* 1st bank: 8 x 32 KB sectors */ flash_info[0].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B; flash_info[0].sector_count = 8; flash_info[0].size = flash_info[0].sector_count * 32 * 1024; addr = PHYS_FLASH; for(i = 0; i < flash_info[0].sector_count; i++) { flash_info[0].start[i] = addr; addr += flash_info[0].size / flash_info[0].sector_count; } /* 1st bank: 63 x 256 KB sectors */ flash_info[1].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B; flash_info[1].sector_count = 63; flash_info[1].size = flash_info[1].sector_count * 256 * 1024; for(i = 0; i < flash_info[1].sector_count; i++) { flash_info[1].start[i] = addr; addr += flash_info[1].size / flash_info[1].sector_count; } /* * protect monitor and environment sectors */ #if CFG_MONITOR_BASE >= PHYS_FLASH flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE+monitor_flash_len-1, &flash_info[0]); flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE+monitor_flash_len-1, &flash_info[1]); #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]); flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[1]); #endif return flash_info[0].size + flash_info[1].size; } /*----------------------------------------------------------------------- */ 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) { case VENDOR_AMD: printf ("AMD "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case AMD_29DL323C_B: printf ("AM29DL323CB (32 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; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { int flag, prot, sect, l_sect; ulong start; unsigned long long volatile *f_addr; unsigned long long volatile f_command; 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"); } f_addr = (unsigned long long *)info->start[0]; f_command = 0x00AA00AA00AA00AAULL; ull_write(&f_addr[0x555], &f_command); f_command = 0x0055005500550055ULL; ull_write(&f_addr[0x2AA], &f_command); f_command = 0x0080008000800080ULL; ull_write(&f_addr[0x555], &f_command); f_command = 0x00AA00AA00AA00AAULL; ull_write(&f_addr[0x555], &f_command); f_command = 0x0055005500550055ULL; ull_write(&f_addr[0x2AA], &f_command); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); /* Start erase on unprotected sectors */ for (l_sect = -1, sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ f_addr = (unsigned long long *)(info->start[sect]); f_command = 0x0030003000300030ULL; ull_write(f_addr, &f_command); l_sect = sect; } } /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); start = get_timer (0); do { if (get_timer(start) > CFG_FLASH_ERASE_TOUT) { /* write reset command, command address is unimportant */ /* this command turns the flash back to read mode */ f_addr = (unsigned long long *)(info->start[l_sect]); f_command = 0x00F000F000F000F0ULL; ull_write(f_addr, &f_command); printf (" timeout\n"); return 1; } } while(*f_addr != 0xFFFFFFFFFFFFFFFFULL); 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) { unsigned long cp, wp; unsigned long long data; int i, l, rc; wp = (addr & ~7); /* get lower long long 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<8 && cnt>0; ++i) { data = (data << 8) | *src++; --cnt; ++cp; } for (; cnt==0 && i<8; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } if ((rc = write_ull(info, wp, data)) != 0) { return rc; } wp += 4; } /* * handle long long aligned part */ while (cnt >= 8) { data = 0; for (i=0; i<8; ++i) { data = (data << 8) | *src++; } if ((rc = write_ull(info, wp, data)) != 0) { return rc; } wp += 8; cnt -= 8; } if (cnt == 0) { return ERR_OK; } /* * handle unaligned tail bytes */ data = 0; for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) { data = (data << 8) | *src++; --cnt; } for (; i<8; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } return write_ull(info, wp, data); } /*--------------------------------------------------------------------------- * * FUNCTION NAME: write_ull * * DESCRIPTION: writes 8 bytes to flash * * EXTERNAL EFFECT: nothing * * PARAMETERS: 32 bit long pointer to address, 64 bit long pointer to data * * RETURNS: 0 if OK, 1 if timeout, 4 if parameter error *--------------------------------------------------------------------------*/ static unsigned char write_ull(flash_info_t *info, unsigned long address, volatile unsigned long long data) { static unsigned long long f_command; static unsigned long long *f_addr; ulong start; /* address muss be 8-aligned! */ if (address & 0x7) return ERR_ALIGN; f_addr = (unsigned long long *)info->start[0]; f_command = 0x00AA00AA00AA00AAULL; ull_write(&f_addr[0x555], &f_command); f_command = 0x0055005500550055ULL; ull_write(&f_addr[0x2AA], &f_command); f_command = 0x00A000A000A000A0ULL; ull_write(&f_addr[0x555], &f_command); f_addr = (unsigned long long *)address; f_command = data; ull_write(f_addr, &f_command); start = get_timer (0); do { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { /* write reset command, command address is unimportant */ /* this command turns the flash back to read mode */ f_addr = (unsigned long long *)info->start[0]; f_command = 0x00F000F000F000F0ULL; ull_write(f_addr, &f_command); return ERR_TIMOUT; } } while(*((unsigned long long *)address) != data); return 0; }