/* * (C) Copyright 2000-2006 * 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> #define PHYS_FLASH_1 CFG_FLASH_BASE #define FLASH_BANK_SIZE 0x800000 #define EN29LV640 0x227e227e flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; void flash_print_info (flash_info_t * info) { int i; switch (info->flash_id & FLASH_VENDMASK) { case (AMD_MANUFACT & FLASH_VENDMASK): printf ("AMD: "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (EN29LV640 & FLASH_TYPEMASK): printf ("EN29LV640 (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: return; } unsigned long 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 = (AMD_MANUFACT & FLASH_VENDMASK) | (EN29LV640 & 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++) { flash_info[i].start[j] = flashbase + 0x10000 * j; } size += flash_info[i].size; } flash_protect (FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + 0x2ffff, &flash_info[0]); return size; } #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 + (0x00000555<<1))) #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA<<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 int flash_erase (flash_info_t * info, int s_first, int s_last) { ulong result; int iflag, 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) != (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) 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. */ iflag = disable_interrupts (); printf ("\n"); /* 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 */ set_timer (0); 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 (0) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) { 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 */ printf("Waiting 10 ms..."); udelay (10000); /* for (i = 0; i < 10 * 1000 * 1000; ++i) asm(" nop"); */ printf("done\n"); if (iflag) enable_interrupts (); return rc; } 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 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. */ 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 */ set_timer (0); /* wait until flash is ready */ chip1 = 0; do { result = *addr; /* check timeout */ if (get_timer (0) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) { 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 (); return rc; } 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 0 if (cnt & 1) { printf ("odd transfer sizes not supported\n"); return ERR_ALIGN; } #endif wp = addr; if (addr & 1) { data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *) src); if ((rc = write_word (info, wp - 1, data)) != 0) { return (rc); } src += 1; wp += 1; cnt -= 1; } 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) << 8) | *((volatile u8 *) (wp + 1)); if ((rc = write_word (info, wp, data)) != 0) { return (rc); } src += 1; wp += 1; cnt -= 1; } return ERR_OK; }