/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH * Rolf Offermanns * * 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 ulong myflush(void); #define FLASH_BANK_SIZE 0x800000 #define MAIN_SECT_SIZE 0x20000 #define PARAM_SECT_SIZE 0x4000 /* puzzle magic for lart * data_*_flash are def'd in flashasm.S */ extern u32 data_from_flash(u32); extern u32 data_to_flash(u32); #define PUZZLE_FROM_FLASH(x) (x) #define PUZZLE_TO_FLASH(x) (x) flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; #define CMD_READ_ARRAY 0x00FF00FF #define CMD_IDENTIFY 0x00900090 #define CMD_ERASE_SETUP 0x00200020 #define CMD_ERASE_CONFIRM 0x00D000D0 #define CMD_PROGRAM 0x00400040 #define CMD_RESUME 0x00D000D0 #define CMD_SUSPEND 0x00B000B0 #define CMD_STATUS_READ 0x00700070 #define CMD_STATUS_RESET 0x00500050 #define BIT_BUSY 0x00800080 #define BIT_ERASE_SUSPEND 0x00400040 #define BIT_ERASE_ERROR 0x00200020 #define BIT_PROGRAM_ERROR 0x00100010 #define BIT_VPP_RANGE_ERROR 0x00080008 #define BIT_PROGRAM_SUSPEND 0x00040004 #define BIT_PROTECT_ERROR 0x00020002 #define BIT_UNDEFINED 0x00010001 #define BIT_SEQUENCE_ERROR 0x00300030 #define BIT_TIMEOUT 0x80000000 /*----------------------------------------------------------------------- */ ulong flash_init(void) { int i, j; ulong size = 0; for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { ulong flashbase = 0; flash_info[i].flash_id = (INTEL_MANUFACT & FLASH_VENDMASK) | (INTEL_ID_28F160F3B & FLASH_TYPEMASK); 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); if (i == 0) flashbase = PHYS_FLASH_1; else panic("configured to many flash banks!\n"); for (j = 0; j < flash_info[i].sector_count; j++) { if (j <= 7) { flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE; } else { flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE; } } size += flash_info[i].size; } /* Protect monitor and environment sectors */ flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + _armboot_end_data - _armboot_start, &flash_info[0]); flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); return size; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t *info) { int i; switch (info->flash_id & FLASH_VENDMASK) { case (INTEL_MANUFACT & FLASH_VENDMASK): printf("Intel: "); break; default: printf("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (INTEL_ID_28F160F3B & FLASH_TYPEMASK): printf("2x 28F160F3B (16Mbit)\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_error (ulong code) { /* Check bit patterns */ /* SR.7=0 is busy, SR.7=1 is ready */ /* all other flags indicate error on 1 */ /* SR.0 is undefined */ /* Timeout is our faked flag */ /* sequence is described in Intel 290644-005 document */ /* check Timeout */ if (code & BIT_TIMEOUT) { printf ("Timeout\n"); return ERR_TIMOUT; } /* check Busy, SR.7 */ if (~code & BIT_BUSY) { printf ("Busy\n"); return ERR_PROG_ERROR; } /* check Vpp low, SR.3 */ if (code & BIT_VPP_RANGE_ERROR) { printf ("Vpp range error\n"); return ERR_PROG_ERROR; } /* check Device Protect Error, SR.1 */ if (code & BIT_PROTECT_ERROR) { printf ("Device protect error\n"); return ERR_PROG_ERROR; } /* check Command Seq Error, SR.4 & SR.5 */ if (code & BIT_SEQUENCE_ERROR) { printf ("Command seqence error\n"); return ERR_PROG_ERROR; } /* check Block Erase Error, SR.5 */ if (code & BIT_ERASE_ERROR) { printf ("Block erase error\n"); return ERR_PROG_ERROR; } /* check Program Error, SR.4 */ if (code & BIT_PROGRAM_ERROR) { printf ("Program error\n"); return ERR_PROG_ERROR; } /* check Block Erase Suspended, SR.6 */ if (code & BIT_ERASE_SUSPEND) { printf ("Block erase suspended\n"); return ERR_PROG_ERROR; } /* check Program Suspended, SR.2 */ if (code & BIT_PROGRAM_SUSPEND) { printf ("Program suspended\n"); return ERR_PROG_ERROR; } /* OK, no error */ return ERR_OK; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { ulong result; int iflag, cflag, 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) != (INTEL_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) return ERR_PROTECTED; /* * 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. */ cflag = icache_status(); icache_disable(); iflag = disable_interrupts(); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last && !ctrlc(); sect++) { printf("Erasing sector %2d ... ", 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]); *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET); *addr = PUZZLE_TO_FLASH(CMD_ERASE_SETUP); *addr = PUZZLE_TO_FLASH(CMD_ERASE_CONFIRM); /* wait until flash is ready */ do { /* check timeout */ if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { *addr = PUZZLE_TO_FLASH(CMD_SUSPEND); result = BIT_TIMEOUT; break; } result = PUZZLE_FROM_FLASH(*addr); } while (~result & BIT_BUSY); *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY); if ((rc = flash_error(result)) != ERR_OK) goto outahere; printf("ok.\n"); } else /* it was protected */ { printf("protected!\n"); } } if (ctrlc()) printf("User Interrupt!\n"); outahere: /* allow flash to settle - wait 10 ms */ udelay_masked(10000); if (iflag) enable_interrupts(); if (cflag) icache_enable(); 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; int cflag, iflag; /* Check if Flash is (sufficiently) erased */ result = PUZZLE_FROM_FLASH(*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. */ cflag = icache_status(); icache_disable(); iflag = disable_interrupts(); *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET); *addr = PUZZLE_TO_FLASH(CMD_PROGRAM); *addr = data; /* arm simple, non interrupt dependent timer */ reset_timer_masked(); /* wait until flash is ready */ do { /* check timeout */ if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { *addr = PUZZLE_TO_FLASH(CMD_SUSPEND); result = BIT_TIMEOUT; break; } result = PUZZLE_FROM_FLASH(*addr); } while (~result & BIT_BUSY); *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY); rc = flash_error(result); if (iflag) enable_interrupts(); if (cflag) icache_enable(); 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; 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> 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) { return (rc); } wp += 4; } /* * handle word aligned part */ while (cnt >= 4) { data = *((vu_long*)src); if ((rc = write_word(info, wp, data)) != 0) { return (rc); } src += 4; wp += 4; cnt -= 4; } if (cnt == 0) { return ERR_OK; } /* * 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); } return write_word(info, wp, data); }