/* * (C) Copyright 2003 * 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> #ifndef CONFIG_FLASH_CFI_DRIVER flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ /* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it * has nothing to do with the flash chip being 8-bit or 16-bit. */ #ifdef CONFIG_FLASH_16BIT typedef unsigned short FLASH_PORT_WIDTH; typedef volatile unsigned short FLASH_PORT_WIDTHV; #define FLASH_ID_MASK 0xFFFF #else typedef unsigned char FLASH_PORT_WIDTH; typedef volatile unsigned char FLASH_PORT_WIDTHV; #define FLASH_ID_MASK 0xFF #endif #define FPW FLASH_PORT_WIDTH #define FPWV FLASH_PORT_WIDTHV #define ORMASK(size) ((-size) & OR_AM_MSK) #define FLASH_CYCLE1 0x0555 #define FLASH_CYCLE2 0x02aa /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size(FPWV *addr, flash_info_t *info); static void flash_reset(flash_info_t *info); static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data); static flash_info_t *flash_get_info(ulong base); /*----------------------------------------------------------------------- * flash_init() * * sets up flash_info and returns size of FLASH (bytes) */ unsigned long flash_init (void) { unsigned long size = 0; int i; extern void flash_preinit(void); extern void flash_afterinit(ulong); ulong flashbase = CONFIG_SYS_FLASH_BASE; flash_preinit(); /* Init: no FLASHes known */ for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { memset(&flash_info[i], 0, sizeof(flash_info_t)); flash_info[i].size = flash_get_size((FPW *)flashbase, &flash_info[i]); size += flash_info[i].size; flashbase += 0x800000; } #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE /* monitor protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, flash_get_info(CONFIG_SYS_MONITOR_BASE)); #endif #ifdef CONFIG_ENV_IS_IN_FLASH /* ENV protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1, flash_get_info(CONFIG_ENV_ADDR)); #endif flash_afterinit(size); return size ? size : 1; } /*----------------------------------------------------------------------- */ static void flash_reset(flash_info_t *info) { FPWV *base = (FPWV *)(info->start[0]); /* Put FLASH back in read mode */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) *base = (FPW)0x00FF00FF; /* Intel Read Mode */ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) *base = (FPW)0x00F000F0; /* AMD Read Mode */ } /*----------------------------------------------------------------------- */ static flash_info_t *flash_get_info(ulong base) { int i; flash_info_t * info; for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) { info = & flash_info[i]; if (info->size && info->start[0] <= base && base <= info->start[0] + info->size - 1) break; } return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t *info) { int i; uchar *boottype; uchar *bootletter; char *fmt; uchar botbootletter[] = "B"; uchar topbootletter[] = "T"; uchar botboottype[] = "bottom boot sector"; uchar topboottype[] = "top boot sector"; if (info->flash_id == FLASH_UNKNOWN) { printf ("missing or unknown FLASH type\n"); return; } switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_AMD: printf ("AMD "); break; case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; case FLASH_MAN_FUJ: printf ("FUJITSU "); break; case FLASH_MAN_SST: printf ("SST "); break; case FLASH_MAN_STM: printf ("STM "); break; case FLASH_MAN_INTEL: printf ("INTEL "); break; default: printf ("Unknown Vendor "); break; } /* check for top or bottom boot, if it applies */ if (info->flash_id & FLASH_BTYPE) { boottype = botboottype; bootletter = botbootletter; } else { boottype = topboottype; bootletter = topbootletter; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AMDLV065D: fmt = "29LV065 (64 Mbit, uniform sectors)\n"; break; default: fmt = "Unknown Chip Type\n"; break; } printf (fmt, bootletter, boottype); 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"); } /*----------------------------------------------------------------------- */ /* * The following code cannot be run from FLASH! */ ulong flash_get_size (FPWV *addr, flash_info_t *info) { int i; FPWV* addr2; /* Write auto select command: read Manufacturer ID */ /* Write auto select command sequence and test FLASH answer */ addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */ addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */ addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */ /* The manufacturer codes are only 1 byte, so just use 1 byte. * This works for any bus width and any FLASH device width. */ udelay(100); switch (addr[0] & 0xff) { case (uchar)AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case (uchar)INTEL_MANUFACT: info->flash_id = FLASH_MAN_INTEL; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; break; } /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */ if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[1]) { case (FPW)AMD_ID_LV065D: info->flash_id += FLASH_AMDLV065D; info->sector_count = 128; info->size = 0x00800000; for( i = 0; i < info->sector_count; i++ ) info->start[i] = (ulong)addr + (i * 0x10000); break; /* => 8 or 16 MB */ default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* => no or unknown flash */ } /* test for real flash at bank 1 */ addr2 = (FPW *)((ulong)addr | 0x800000); if (addr2 != addr && ((addr2[0] & 0xff) == (addr[0] & 0xff)) && ((FPW)addr2[1] == (FPW)addr[1])) { /* Seems 2 banks are the same space (8Mb chip is installed, * J24 in default position (CS0)). Disable this (first) bank. */ info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; } /* Put FLASH back in read mode */ flash_reset(info); return (info->size); } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { FPWV *addr; int flag, prot, sect; int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL; ulong start, now, last; int rcode = 0; 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; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AMDLV065D: break; case FLASH_UNKNOWN: default: printf ("Can't erase unknown flash type %08lx - aborted\n", info->flash_id); 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"); } last = get_timer(0); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last && rcode == 0; sect++) { if (info->protect[sect] != 0) /* protected, skip it */ continue; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr = (FPWV *)(info->start[sect]); if (intel) { *addr = (FPW)0x00500050; /* clear status register */ *addr = (FPW)0x00200020; /* erase setup */ *addr = (FPW)0x00D000D0; /* erase confirm */ } else { /* must be AMD style if not Intel */ FPWV *base; /* first address in bank */ base = (FPWV *)(info->start[0]); base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */ base[FLASH_CYCLE1] = (FPW)0x00800080; /* erase mode */ base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */ *addr = (FPW)0x00300030; /* erase sector */ } /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); start = get_timer(0); /* wait at least 50us for AMD, 80us for Intel. * Let's wait 1 ms. */ udelay (1000); while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) { if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { printf ("Timeout\n"); if (intel) { /* suspend erase */ *addr = (FPW)0x00B000B0; } flash_reset(info); /* reset to read mode */ rcode = 1; /* failed */ break; } /* show that we're waiting */ if ((get_timer(last)) > CONFIG_SYS_HZ) {/* every second */ putc ('.'); last = get_timer(0); } } /* show that we're waiting */ if ((get_timer(last)) > CONFIG_SYS_HZ) { /* every second */ putc ('.'); last = get_timer(0); } flash_reset(info); /* reset to read mode */ } printf (" done\n"); return rcode; } /*----------------------------------------------------------------------- * 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) { FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */ int bytes; /* number of bytes to program in current word */ int left; /* number of bytes left to program */ int i, res; for (left = cnt, res = 0; left > 0 && res == 0; addr += sizeof(data), left -= sizeof(data) - bytes) { bytes = addr & (sizeof(data) - 1); addr &= ~(sizeof(data) - 1); /* combine source and destination data so can program * an entire word of 16 or 32 bits */ for (i = 0; i < sizeof(data); i++) { data <<= 8; if (i < bytes || i - bytes >= left ) data += *((uchar *)addr + i); else data += *src++; } /* write one word to the flash */ switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_AMD: res = write_word_amd(info, (FPWV *)addr, data); break; default: /* unknown flash type, error! */ printf ("missing or unknown FLASH type\n"); res = 1; /* not really a timeout, but gives error */ break; } } return (res); } /*----------------------------------------------------------------------- * Write a word to Flash for AMD FLASH * A word is 16 or 32 bits, whichever the bus width of the flash bank * (not an individual chip) is. * * returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data) { ulong start; int flag; int res = 0; /* result, assume success */ FPWV *base; /* first address in flash bank */ /* Check if Flash is (sufficiently) erased */ if ((*dest & data) != data) { return (2); } base = (FPWV *)(info->start[0]); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */ base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */ *dest = data; /* start programming the data */ /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); start = get_timer (0); /* data polling for D7 */ while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) { if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { *dest = (FPW)0x00F000F0; /* reset bank */ res = 1; } } return (res); } #endif /*CONFIG_FLASH_CFI_DRIVER*/