/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.de> * * (C) Copyright 2005 * 2N Telekomunikace, a.s. <www.2n.cz> * Ladislav Michl <michl@2n.cz> * * 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> /*#if 0 */ #if (PHYS_SDRAM_1_SIZE != SZ_32M) #include "crcek.h" #if (CFG_MAX_FLASH_BANKS > 1) #error There is always only _one_ flash chip #endif flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; #define CMD_READ_ARRAY 0x000000f0 #define CMD_UNLOCK1 0x000000aa #define CMD_UNLOCK2 0x00000055 #define CMD_ERASE_SETUP 0x00000080 #define CMD_ERASE_CONFIRM 0x00000030 #define CMD_PROGRAM 0x000000a0 #define CMD_UNLOCK_BYPASS 0x00000020 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1))) #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1))) #define BIT_ERASE_DONE 0x00000080 #define BIT_RDY_MASK 0x00000080 #define BIT_PROGRAM_ERROR 0x00000020 #define BIT_TIMEOUT 0x80000000 /* our flag */ /*----------------------------------------------------------------------- */ ulong flash_init(void) { int i; flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) | (AMD_ID_LV800B & FLASH_TYPEMASK); flash_info[0].size = PHYS_FLASH_1_SIZE; flash_info[0].sector_count = CFG_MAX_FLASH_SECT; memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT); for (i = 0; i < flash_info[0].sector_count; i++) { switch (i) { case 0: /* 16kB */ flash_info[0].start[0] = CFG_FLASH_BASE; break; case 1: /* 8kB */ flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000; break; case 2: /* 8kB */ flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 + 0x2000; break; case 3: /* 32 KB */ flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 + 2 * 0x2000; break; case 4: flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 + 2 * 0x2000 + 0x8000; break; default: /* 64kB */ flash_info[0].start[i] = flash_info[0].start[i-1] + 0x10000; break; } } /* U-Boot */ flash_protect(FLAG_PROTECT_SET, LOADER1_OFFSET, LOADER1_OFFSET + LOADER_SIZE - 1, flash_info); /* Protect crcek, env and r_env as well */ flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info); return flash_info[0].size; } /*----------------------------------------------------------------------- */ void flash_print_info(flash_info_t *info) { int i; switch (info->flash_id & FLASH_VENDMASK) { case (AMD_MANUFACT & FLASH_VENDMASK): puts("AMD: "); break; default: puts("Unknown vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (AMD_ID_LV800B & FLASH_TYPEMASK): puts("AM29LV800BB (8Mb)\n"); break; default: puts("Unknown chip type\n"); return; } printf(" Size: %ld MB in %d sectors\n", info->size >> 20, info->sector_count); puts(" Sector start addresses:"); for (i = 0; i < info->sector_count; i++) { if ((i % 5) == 0) puts("\n "); printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " "); } puts("\n"); } /*----------------------------------------------------------------------- */ int flash_erase(flash_info_t *info, int s_first, int s_last) { ushort result; int prot, sect; int rc = ERR_OK; /* 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; if ((info->flash_id & FLASH_VENDMASK) != (AMD_MANUFACT & FLASH_VENDMASK)) 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 putc('\n'); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { if (info->protect[sect] == 0) { /* not protected */ vu_short *addr = (vu_short *) (info->start[sect]); /* arm simple, non interrupt dependent timer */ reset_timer_masked(); 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 */ while (1) { result = *addr; /* check timeout */ if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { MEM_FLASH_ADDR1 = CMD_READ_ARRAY; rc = ERR_TIMOUT; break; } if ((result & 0xfff) & BIT_ERASE_DONE) break; if ((result & 0xffff) & BIT_PROGRAM_ERROR) { rc = ERR_PROG_ERROR; break; } } MEM_FLASH_ADDR1 = CMD_READ_ARRAY; if (rc != ERR_OK) goto out; putc('.'); } } out: /* allow flash to settle - wait 10 ms */ udelay_masked(10000); return rc; } /*----------------------------------------------------------------------- * Copy memory to flash */ static int write_hword(flash_info_t *info, ulong dest, ushort data) { vu_short *addr = (vu_short *) dest; ushort result; int rc = ERR_OK; /* check if flash is (sufficiently) erased */ result = *addr; if ((result & data) != data) return ERR_NOT_ERASED; MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; MEM_FLASH_ADDR1 = CMD_PROGRAM; *addr = data; /* arm simple, non interrupt dependent timer */ reset_timer_masked(); /* wait until flash is ready */ while (1) { result = *addr; /* check timeout */ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { rc = ERR_TIMOUT; break; } if ((result & 0x80) == (data & 0x80)) break; if ((result & 0xffff) & BIT_PROGRAM_ERROR) { result = *addr; if ((result & 0x80) != (data & 0x80)) rc = ERR_PROG_ERROR; } } *addr = CMD_READ_ARRAY; if (*addr != data) rc = ERR_PROG_ERROR; return rc; } /*----------------------------------------------------------------------- * Copy memory to flash. */ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) { ulong cp, wp; int l; int i, rc; ushort data; wp = (addr & ~1); /* 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 << 8); for (; i < 2 && cnt > 0; ++i) { data = (data >> 8) | (*src++ << 8); --cnt; ++cp; } for (; cnt == 0 && i < 2; ++i, ++cp) data = (data >> 8) | (*(uchar *) cp << 8); if ((rc = write_hword(info, wp, data)) != 0) return (rc); wp += 2; } /* * handle word aligned part */ while (cnt >= 2) { data = *((vu_short *) src); if ((rc = write_hword(info, wp, data)) != 0) return (rc); src += 2; wp += 2; cnt -= 2; } if (cnt == 0) return ERR_OK; /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) { data = (data >> 8) | (*src++ << 8); --cnt; } for (; i < 2; ++i, ++cp) data = (data >> 8) | (*(uchar *) cp << 8); return write_hword(info, wp, data); } #endif