/* * (C) Copyright 2002 * Lineo, Inc. * Bernhard Kuhn * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH * Alex Zuepke * * 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 0x200000 /* 2 MB */ #define MAIN_SECT_SIZE 0x10000 /* 64 KB */ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; #define CMD_READ_ARRAY 0x00F0 #define CMD_UNLOCK1 0x00AA #define CMD_UNLOCK2 0x0055 #define CMD_ERASE_SETUP 0x0080 #define CMD_ERASE_CONFIRM 0x0030 #define CMD_PROGRAM 0x00A0 #define CMD_UNLOCK_BYPASS 0x0020 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00005555<<1))) #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00002AAA<<1))) #define BIT_ERASE_DONE 0x0080 #define BIT_RDY_MASK 0x0080 #define BIT_PROGRAM_ERROR 0x0020 #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[i].flash_id = (ATM_MANUFACT & FLASH_VENDMASK) | (ATM_ID_BV1614 & 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 <= 9) { /* 1st to 8th are 8 KB */ if (j <= 7) { flash_info[i].start[j] = flashbase + j*0x2000; } /* 9th and 10th are both 32 KB */ if ((j == 8) || (j == 9)) { flash_info[i].start[j] = flashbase + 0x10000 + (j-8)*0x8000; } } else { flash_info[i].start[j] = flashbase + (j-8)*MAIN_SECT_SIZE; } } size += flash_info[i].size; } flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_ENV_ADDR - 1, &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 (ATM_MANUFACT & FLASH_VENDMASK): printf("Atmel: "); break; default: printf("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (ATM_ID_BV1614 & FLASH_TYPEMASK): printf("AT49BV1614 (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_erase (flash_info_t *info, int s_first, int s_last) { ulong result; int iflag, cflag, prot, sect; int rc = ERR_OK; int chip1; /* 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) != (ATM_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 */ volatile u16 *addr = (volatile u16 *)(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 = 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; } while (!chip1); MEM_FLASH_ADDR1 = CMD_READ_ARRAY; if (chip1 == ERR) { rc = ERR_PROG_ERROR; goto outahere; } if (chip1 == TMO) { rc = ERR_TIMOUT; 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) { volatile u16 *addr = (volatile u16 *)dest; ulong result; int rc = ERR_OK; int cflag, iflag; int chip1; /* * 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. */ cflag = icache_status(); icache_disable(); iflag = disable_interrupts(); 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 */ chip1 = 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; } while (!chip1); *addr = CMD_READ_ARRAY; if (chip1 == ERR || *addr != data) rc = ERR_PROG_ERROR; 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 wp, data; int rc; if(addr & 1) { printf("unaligned destination not supported\n"); return ERR_ALIGN; }; if((int)src & 1) { printf("unaligned source not supported\n"); return ERR_ALIGN; }; wp = addr; while (cnt >= 2) { data = *((volatile u16*)src); if ((rc = write_word(info, wp, data)) != 0) { return (rc); } src += 2; wp += 2; cnt -= 2; } if(cnt == 1) { data = (*((volatile u8*)src)) | (*((volatile u8*)(wp+1)) << 8); if ((rc = write_word(info, wp, data)) != 0) { return (rc); } src += 1; wp += 1; cnt -= 1; }; return ERR_OK; }