/* * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2004, Li-Pro.Net <www.li-pro.net> * Stephan Linz <linz@li-pro.net> * * 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 <watchdog.h> #include <nios.h> flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /*--------------------------------------------------------------------*/ void flash_print_info (flash_info_t * info) { int i, k; unsigned long size; int erased; volatile unsigned char *flash; 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 char *) info->start[i]; for (k = 0; k < size; k++) { if (*flash++ != 0xff) { erased = 0; break; } } /* Print the info */ if ((i % 5) == 0) printf ("\n "); printf (" %08lX%s%s", info->start[i], erased ? " E" : " ", info->protect[i] ? "RO " : " "); } printf ("\n"); } /*-------------------------------------------------------------------*/ int flash_erase (flash_info_t * info, int s_first, int s_last) { volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]); volatile CFG_FLASH_WORD_SIZE *addr2; int prot, sect, wait; unsigned oldpri; ulong start; /* Some sanity checking */ if ((s_first < 0) || (s_first > s_last)) { 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"); } #ifdef DEBUG for (sect = s_first; sect <= s_last; sect++) { printf("- Erase: Sect: %i @ 0x%08x\n", sect, info->start[sect]); } #endif /* NOTE: disabling interrupts on Nios can be very bad since it * also disables the LO_LIMIT exception. It's better here to * set the interrupt priority to 3 & restore it when we're done. */ oldpri = ipri (3); /* It's ok to erase multiple sectors provided we don't delay more * than 50 usec between cmds ... at which point the erase time-out * occurs. So don't go and put printf() calls in the loop ... it * won't be very helpful ;-) */ for (sect = s_first; sect <= s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]); *addr = 0xf0; *(addr+0xAAA/2) = 0xaa; *(addr+0x554/2) = 0x55; *(addr+0xAAA/2) = 0x80; *(addr+0xAAA/2) = 0xaa; *(addr+0x554/2) = 0x55; *addr2 = 0x30; /* Now just wait for 0xffff & provide some user * feedback while we wait. Here we have to grant * timer interrupts. Otherwise get_timer() can't * work right. */ ipri(oldpri); start = get_timer (0); while (*addr2 != 0xffff) { for (wait = 8; wait; wait--) { udelay (125 * 1000); } putc ('.'); if (get_timer (start) > CFG_FLASH_ERASE_TOUT) { printf ("timeout\n"); return 1; } } oldpri = ipri (3); /* disallow non important irqs again */ } } printf ("\n"); *addr = 0xf0; /* Restore interrupt priority */ ipri (oldpri); return 0; } /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ int write_buff (flash_info_t * info, uchar * srcbuffer, ulong addr, ulong cnt) { volatile CFG_FLASH_WORD_SIZE *cmd = (vu_short *) info->start[0]; volatile CFG_FLASH_WORD_SIZE *dst = (vu_short *) addr; CFG_FLASH_WORD_SIZE *src = (void *) srcbuffer; CFG_FLASH_WORD_SIZE b; unsigned oldpri; ulong start; cnt /= sizeof(CFG_FLASH_WORD_SIZE); while (cnt) { /* Check for sufficient erase */ b = *src; if ((*dst & b) != b) { printf ("%02x : %02x\n", *dst, b); return (2); } /* Disable interrupts other than window underflow * (interrupt priority 2) */ oldpri = ipri (3); *(cmd+0xAAA/2) = 0xaa; *(cmd+0x554/2) = 0x55; *(cmd+0xAAA/2) = 0xa0; ipri (oldpri); *dst = b; /* Verify write */ start = get_timer (0); while (*dst != b) { if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { *cmd = 0xf0; return 1; } } dst++; src++; cnt--; } *cmd = 0xf0; return (0); }