/* * (C) Copyright 2001 * 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 */ #include <common.h> #include <mpc824x.h> #include <asm/processor.h> #if defined(CFG_ENV_IS_IN_FLASH) # ifndef CFG_ENV_ADDR # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) # endif # ifndef CFG_ENV_SIZE # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE # endif # ifndef CFG_ENV_SECT_SIZE # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE # endif #endif #define FLASH_BANK_SIZE 0x800000 #define MAIN_SECT_SIZE 0x40000 #define PARAM_SECT_SIZE 0x8000 #define BOARD_CTRL_REG 0xFE800013 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; static int write_data (flash_info_t *info, ulong dest, ulong *data); static void write_via_fpu(vu_long *addr, ulong *data); static __inline__ unsigned long get_msr(void); static __inline__ void set_msr(unsigned long msr); /*---------------------------------------------------------------------*/ #undef DEBUG_FLASH /*---------------------------------------------------------------------*/ #ifdef DEBUG_FLASH #define DEBUGF(fmt,args...) printf(fmt ,##args) #else #define DEBUGF(fmt,args...) #endif /*---------------------------------------------------------------------*/ /*----------------------------------------------------------------------- */ unsigned long flash_init(void) { int i, j; ulong size = 0; volatile unsigned char *bcr = (volatile unsigned char *)(BOARD_CTRL_REG); DEBUGF("Write protect was: 0x%02X\n", *bcr); *bcr &= 0x1; /* FWPT must be 0 */ *bcr |= 0x6; /* FWP0 = FWP1 = 1 */ DEBUGF("Write protect is: 0x%02X\n", *bcr); for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { vu_long *addr = (vu_long *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE); addr[0] = 0x00900090; DEBUGF ("Flash bank # %d:\n" "\tManuf. ID @ 0x%08lX: 0x%08lX\n" "\tDevice ID @ 0x%08lX: 0x%08lX\n", i, (ulong)(&addr[0]), addr[0], (ulong)(&addr[2]), addr[2]); if ((addr[0] == addr[1]) && (addr[0] == INTEL_MANUFACT) && (addr[2] == addr[3]) && (addr[2] == INTEL_ID_28F160F3B)) { flash_info[i].flash_id = (FLASH_MAN_INTEL & FLASH_VENDMASK) | (INTEL_ID_28F160F3B & FLASH_TYPEMASK); } else { flash_info[i].flash_id = FLASH_UNKNOWN; addr[0] = 0xFFFFFFFF; goto Done; } DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id); addr[0] = 0xFFFFFFFF; flash_info[i].size = FLASH_BANK_SIZE; flash_info[i].sector_count = CFG_MAX_FLASH_SECT; memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT); for (j = 0; j < flash_info[i].sector_count; j++) { if (j <= 7) { flash_info[i].start[j] = CFG_FLASH_BASE + i * FLASH_BANK_SIZE + j * PARAM_SECT_SIZE; } else { flash_info[i].start[j] = CFG_FLASH_BASE + i * FLASH_BANK_SIZE + (j - 7)*MAIN_SECT_SIZE; } } size += flash_info[i].size; } /* Protect monitor and environment sectors */ #if CFG_MONITOR_BASE >= CFG_FLASH_BASE #if CFG_MONITOR_BASE >= CFG_FLASH_BASE + FLASH_BANK_SIZE flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[1]); #else flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]); #endif #endif #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) #if CFG_ENV_ADDR >= CFG_FLASH_BASE + FLASH_BANK_SIZE flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[1]); #else flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); #endif #endif Done: return size; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { int i; switch ((i = info->flash_id & FLASH_VENDMASK)) { case (FLASH_MAN_INTEL & FLASH_VENDMASK): printf ("Intel: "); break; default: printf ("Unknown Vendor 0x%04x ", i); break; } switch ((i = info->flash_id & FLASH_TYPEMASK)) { case (INTEL_ID_28F160F3B & FLASH_TYPEMASK): printf ("28F160F3B (16Mbit)\n"); break; default: printf ("Unknown Chip Type 0x%04x\n", i); goto Done; 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"); Done: return; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { int flag, prot, sect; ulong start, now, last; DEBUGF ("Erase flash bank %d sect %d ... %d\n", info - &flash_info[0], s_first, s_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; } if ((info->flash_id & FLASH_VENDMASK) != (FLASH_MAN_INTEL & FLASH_VENDMASK)) { printf ("Can erase only Intel flash types - 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"); } start = get_timer (0); last = start; /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ vu_long *addr = (vu_long *)(info->start[sect]); DEBUGF ("Erase sect %d @ 0x%08lX\n", sect, (ulong)addr); /* Disable interrupts which might cause a timeout * here. */ flag = disable_interrupts(); addr[0] = 0x00500050; /* clear status register */ addr[0] = 0x00200020; /* erase setup */ addr[0] = 0x00D000D0; /* erase confirm */ addr[1] = 0x00500050; /* clear status register */ addr[1] = 0x00200020; /* erase setup */ addr[1] = 0x00D000D0; /* erase confirm */ /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* wait at least 80us - let's wait 1 ms */ udelay (1000); while (((addr[0] & 0x00800080) != 0x00800080) || ((addr[1] & 0x00800080) != 0x00800080) ) { if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); addr[0] = 0x00B000B0; /* suspend erase */ addr[0] = 0x00FF00FF; /* to read mode */ return 1; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } } addr[0] = 0x00FF00FF; } } printf (" done\n"); return 0; } /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased * 4 - Flash not identified */ #define FLASH_WIDTH 8 /* flash bus width in bytes */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) { ulong wp, cp, msr; int l, rc, i; ulong data[2]; ulong *datah = &data[0]; ulong *datal = &data[1]; DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n", addr, (ulong)src, cnt); if (info->flash_id == FLASH_UNKNOWN) { return 4; } msr = get_msr(); set_msr(msr | MSR_FP); wp = (addr & ~(FLASH_WIDTH-1)); /* get lower aligned address */ /* * handle unaligned start bytes */ if ((l = addr - wp) != 0) { *datah = *datal = 0; for (i = 0, cp = wp; i < l; i++, cp++) { if (i >= 4) { *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); } *datal = (*datal << 8) | (*(uchar *)cp); } for (; i < FLASH_WIDTH && cnt > 0; ++i) { char tmp; tmp = *src; src++; if (i >= 4) { *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); } *datal = (*datal << 8) | tmp; --cnt; ++cp; } for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) { if (i >= 4) { *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); } *datal = (*datah << 8) | (*(uchar *)cp); } if ((rc = write_data(info, wp, data)) != 0) { set_msr(msr); return (rc); } wp += FLASH_WIDTH; } /* * handle FLASH_WIDTH aligned part */ while (cnt >= FLASH_WIDTH) { *datah = *(ulong *)src; *datal = *(ulong *)(src + 4); if ((rc = write_data(info, wp, data)) != 0) { set_msr(msr); return (rc); } wp += FLASH_WIDTH; cnt -= FLASH_WIDTH; src += FLASH_WIDTH; } if (cnt == 0) { set_msr(msr); return (0); } /* * handle unaligned tail bytes */ *datah = *datal = 0; for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) { char tmp; tmp = *src; src++; if (i >= 4) { *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); } *datal = (*datal << 8) | tmp; --cnt; } for (; i < FLASH_WIDTH; ++i, ++cp) { if (i >= 4) { *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); } *datal = (*datal << 8) | (*(uchar *)cp); } rc = write_data(info, wp, data); set_msr(msr); return (rc); } /*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_data (flash_info_t *info, ulong dest, ulong *data) { vu_long *addr = (vu_long *)dest; ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if (((addr[0] & data[0]) != data[0]) || ((addr[1] & data[1]) != data[1]) ) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr[0] = 0x00400040; /* write setup */ write_via_fpu(addr, data); /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); start = get_timer (0); while (((addr[0] & 0x00800080) != 0x00800080) || ((addr[1] & 0x00800080) != 0x00800080) ) { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { addr[0] = 0x00FF00FF; /* restore read mode */ return (1); } } addr[0] = 0x00FF00FF; /* restore read mode */ return (0); } /*----------------------------------------------------------------------- */ static void write_via_fpu(vu_long *addr, ulong *data) { __asm__ __volatile__ ("lfd 1, 0(%0)" : : "r" (data)); __asm__ __volatile__ ("stfd 1, 0(%0)" : : "r" (addr)); } /*----------------------------------------------------------------------- */ static __inline__ unsigned long get_msr(void) { unsigned long msr; __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :); return msr; } static __inline__ void set_msr(unsigned long msr) { __asm__ __volatile__ ("mtmsr %0" : : "r" (msr)); }