/* * (C) Copyright 2002 * Gary Jennejohn, DENX Software Engineering, <gj@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 */ /* #define DEBUG */ #include <common.h> #include <environment.h> static ulong flash_get_size (vu_long *addr, flash_info_t *info); flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; #define CMD_READ_ARRAY 0x00F000F0 #define CMD_UNLOCK1 0x00AA00AA #define CMD_UNLOCK2 0x00550055 #define CMD_ERASE_SETUP 0x00800080 #define CMD_ERASE_CONFIRM 0x00300030 #define CMD_PROGRAM 0x00A000A0 #define CMD_UNLOCK_BYPASS 0x00200020 #define CMD_READ_MANF_ID 0x00900090 #define CMD_UNLOCK_BYPASS_RES1 0x00900090 #define CMD_UNLOCK_BYPASS_RES2 0x00000000 #define MEM_FLASH_ADDR (*(volatile u32 *)CFG_FLASH_BASE) #define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2))) #define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2))) #define BIT_ERASE_DONE 0x00800080 #define BIT_RDY_MASK 0x00800080 #define BIT_PROGRAM_ERROR 0x00200020 #define BIT_TIMEOUT 0x80000000 /* our flag */ #define READY 1 #define ERR 2 #define TMO 4 /*----------------------------------------------------------------------- */ ulong flash_init (void) { int i, j; ulong size = 0; for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { ulong flashbase = 0; flash_info_t *info = &flash_info[i]; /* Init: no FLASHes known */ info->flash_id = FLASH_UNKNOWN; size += flash_get_size (CFG_FLASH_BASE, info); if (i == 0) flashbase = CFG_FLASH_BASE; else panic ("configured too many flash banks!\n"); for (j = 0; j < info->sector_count; j++) { info->protect[j] = 0; info->start[j] = flashbase; switch (info->flash_id & FLASH_TYPEMASK) { case (FLASH_AM320B & FLASH_TYPEMASK): case (FLASH_MXLV320B & FLASH_TYPEMASK): /* Boot sector type: 8 x 8 + N x 128 kB */ flashbase += (j < 8) ? 0x4000 : 0x20000; break; case (FLASH_AM640U & FLASH_TYPEMASK): /* Uniform sector type: 128 kB */ flashbase += 0x20000; break; default: printf ("## Bad flash chip type 0x%04lX\n", info->flash_id & FLASH_TYPEMASK); } } } /* * Protect monitor and environment sectors */ flash_protect ( FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]); flash_protect ( FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); #ifdef CFG_ENV_ADDR_REDUND flash_protect ( FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND, CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1, &flash_info[0]); #endif return size; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { int i; switch (info->flash_id & FLASH_VENDMASK) { case (FLASH_MAN_AMD & FLASH_VENDMASK): printf ("AMD "); break; case (FLASH_MAN_FUJ & FLASH_VENDMASK): printf ("FUJITSU "); break; case (FLASH_MAN_MX & FLASH_VENDMASK): printf ("MACRONIX "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (FLASH_AM320B & FLASH_TYPEMASK): printf ("2x Am29LV320DB (32Mbit)\n"); break; case (FLASH_MXLV320B & FLASH_TYPEMASK): printf ("2x MX29LV320DB (32Mbit)\n"); break; case (FLASH_AM640U & FLASH_TYPEMASK): printf ("2x Am29LV640D (64Mbit)\n"); break; default: printf ("Unknown Chip Type\n"); 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: ; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { ulong result; #if 0 int cflag; #endif int iflag, prot, sect; int rc = ERR_OK; int chip1, chip2; debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last); /* first look for protection bits */ if (info->flash_id == FLASH_UNKNOWN) return ERR_UNKNOWN_FLASH_TYPE; if ((s_first < 0) || (s_first > s_last)) { return ERR_INVAL; } switch (info->flash_id & FLASH_VENDMASK) { case (FLASH_MAN_AMD & FLASH_VENDMASK): break; /* OK */ case (FLASH_MAN_FUJ & FLASH_VENDMASK): break; /* OK */ case (FLASH_MAN_MX & FLASH_VENDMASK): break; /* OK */ default: debug ("## flash_erase: unknown manufacturer\n"); return (ERR_UNKNOWN_FLASH_VENDOR); } 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"); } /* * Disable interrupts which might cause a timeout * here. Remember that our exception vectors are * at address 0 in the flash, and we don't want a * (ticker) exception to happen while the flash * chip is in programming mode. */ #if 0 cflag = icache_status (); icache_disable (); #endif iflag = disable_interrupts (); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { debug ("Erasing sector %2d @ %08lX... ", sect, info->start[sect]); /* arm simple, non interrupt dependent timer */ reset_timer_masked (); if (info->protect[sect] == 0) { /* not protected */ vu_long *addr = (vu_long *) (info->start[sect]); MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; *addr = CMD_ERASE_CONFIRM; /* wait until flash is ready */ chip1 = chip2 = 0; do { result = *addr; /* check timeout */ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { MEM_FLASH_ADDR1 = CMD_READ_ARRAY; chip1 = TMO; break; } if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) chip1 = READY; if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) chip1 = ERR; if (!chip2 && (result >> 16) & BIT_ERASE_DONE) chip2 = READY; if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) chip2 = ERR; } while (!chip1 || !chip2); MEM_FLASH_ADDR1 = CMD_READ_ARRAY; if (chip1 == ERR || chip2 == ERR) { rc = ERR_PROG_ERROR; goto outahere; } if (chip1 == TMO) { rc = ERR_TIMOUT; goto outahere; } } } outahere: /* allow flash to settle - wait 10 ms */ udelay_masked (10000); if (iflag) enable_interrupts (); #if 0 if (cflag) icache_enable (); #endif return rc; } /*----------------------------------------------------------------------- * Copy memory to flash */ volatile static int write_word (flash_info_t * info, ulong dest, ulong data) { vu_long *addr = (vu_long *) dest; ulong result; int rc = ERR_OK; #if 0 int cflag; #endif int iflag; int chip1, chip2; /* * Check if Flash is (sufficiently) erased */ result = *addr; if ((result & data) != data) return ERR_NOT_ERASED; /* * Disable interrupts which might cause a timeout * here. Remember that our exception vectors are * at address 0 in the flash, and we don't want a * (ticker) exception to happen while the flash * chip is in programming mode. */ #if 0 cflag = icache_status (); icache_disable (); #endif iflag = disable_interrupts (); *addr = CMD_PROGRAM; *addr = data; /* arm simple, non interrupt dependent timer */ reset_timer_masked (); /* wait until flash is ready */ chip1 = chip2 = 0; do { result = *addr; /* check timeout */ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { chip1 = ERR | TMO; break; } if (!chip1 && ((result & 0x80) == (data & 0x80))) chip1 = READY; if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) { result = *addr; if ((result & 0x80) == (data & 0x80)) chip1 = READY; else chip1 = ERR; } if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) chip2 = READY; if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) { result = *addr; if ((result & (0x80 << 16)) == (data & (0x80 << 16))) chip2 = READY; else chip2 = ERR; } } while (!chip1 || !chip2); *addr = CMD_READ_ARRAY; if (chip1 == ERR || chip2 == ERR || *addr != data) rc = ERR_PROG_ERROR; if (iflag) enable_interrupts (); #if 0 if (cflag) icache_enable (); #endif return rc; } /*----------------------------------------------------------------------- * Copy memory to flash. */ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) { ulong cp, wp, data; int l; int i, rc; MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS; wp = (addr & ~3); /* get lower word 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 << 24); } for (; i < 4 && cnt > 0; ++i) { data = (data >> 8) | (*src++ << 24); --cnt; ++cp; } for (; cnt == 0 && i < 4; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 24); } if ((rc = write_word (info, wp, data)) != 0) { goto Done; } wp += 4; } /* * handle word aligned part */ while (cnt >= 4) { if (((ulong)src) & 0x3) { for (i = 0; i < 4; i++) { ((char *)&data)[i] = ((vu_char *)src)[i]; } } else { data = *((vu_long *) src); } if ((rc = write_word (info, wp, data)) != 0) { goto Done; } src += 4; wp += 4; cnt -= 4; } if (cnt == 0) { rc = ERR_OK; goto Done; } /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { data = (data >> 8) | (*src++ << 24); --cnt; } for (; i < 4; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 24); } rc = write_word (info, wp, data); Done: MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES1; MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES2; return (rc); } /*----------------------------------------------------------------------- */ static ulong flash_get_size (vu_long *addr, flash_info_t *info) { ulong value; /* Write auto select command sequence and read Manufacturer ID */ addr[0x0555] = CMD_UNLOCK1; addr[0x02AA] = CMD_UNLOCK2; addr[0x0555] = CMD_READ_MANF_ID; value = addr[0]; debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value); switch (value) { case AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case FUJ_MANUFACT: info->flash_id = FLASH_MAN_FUJ; break; case MX_MANUFACT: info->flash_id = FLASH_MAN_MX; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; addr[0] = 0x00FF00FF; /* restore read mode */ debug ("## flash_init: unknown manufacturer\n"); return (0); /* no or unknown flash */ } value = addr[1]; /* device ID */ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value); switch (value) { case AMD_ID_LV320B: info->flash_id += FLASH_AM320B; info->sector_count = 71; info->size = 0x00800000; addr[0] = 0x00FF00FF; /* restore read mode */ break; /* => 8 MB */ case AMD_ID_LV640U: info->flash_id += FLASH_AM640U; info->sector_count = 128; info->size = 0x01000000; addr[0] = 0x00F000F0; /* restore read mode */ break; /* => 16 MB */ case MX_ID_LV320B: info->flash_id += FLASH_MXLV320B; info->sector_count = 71; info->size = 0x00800000; addr[0] = 0x00FF00FF; /* restore read mode */ break; /* => 8 MB */ default: debug ("## flash_init: unknown flash chip\n"); info->flash_id = FLASH_UNKNOWN; addr[0] = 0x00FF00FF; /* restore read mode */ return (0); /* => no or unknown flash */ } if (info->sector_count > CFG_MAX_FLASH_SECT) { printf ("** ERROR: sector count %d > max (%d) **\n", info->sector_count, CFG_MAX_FLASH_SECT); info->sector_count = CFG_MAX_FLASH_SECT; } return (info->size); }