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@ -1,432 +0,0 @@ |
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/*
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* (C) Copyright 2003-2004 |
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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* |
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* (C) Copyright 2004 |
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* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
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/*
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* CPU to flash interface is 8-bit, so make declaration accordingly |
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*/ |
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typedef unsigned char FLASH_PORT_WIDTH; |
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typedef volatile unsigned char FLASH_PORT_WIDTHV; |
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#define FPW FLASH_PORT_WIDTH |
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#define FPWV FLASH_PORT_WIDTHV |
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#define FLASH_CYCLE1 0x0555 |
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#define FLASH_CYCLE2 0x02aa |
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/*-----------------------------------------------------------------------
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* Functions |
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*/ |
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static ulong flash_get_size(FPWV *addr, flash_info_t *info); |
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static void flash_reset(flash_info_t *info); |
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static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data); |
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static flash_info_t *flash_get_info(ulong base); |
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/*-----------------------------------------------------------------------
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* flash_init() |
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* |
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* sets up flash_info and returns size of FLASH (bytes) |
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*/ |
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unsigned long flash_init (void) |
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{ |
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unsigned long size = 0; |
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extern void flash_preinit(void); |
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ulong flashbase = CFG_FLASH_BASE; |
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flash_preinit(); |
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/* Init: no FLASHes known */ |
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memset(&flash_info[0], 0, sizeof(flash_info_t)); |
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flash_info[0].size = |
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flash_get_size((FPW *)flashbase, &flash_info[0]); |
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size = flash_info[0].size; |
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#if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
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/* monitor protection ON by default */ |
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flash_protect(FLAG_PROTECT_SET, |
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CFG_MONITOR_BASE, |
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CFG_MONITOR_BASE+monitor_flash_len-1, |
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flash_get_info(CFG_MONITOR_BASE)); |
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#endif |
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#ifdef CFG_ENV_IS_IN_FLASH |
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/* ENV protection ON by default */ |
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flash_protect(FLAG_PROTECT_SET, |
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CFG_ENV_ADDR, |
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CFG_ENV_ADDR+CFG_ENV_SIZE-1, |
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flash_get_info(CFG_ENV_ADDR)); |
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#endif |
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return size ? size : 1; |
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} |
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/*-----------------------------------------------------------------------
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*/ |
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static void flash_reset(flash_info_t *info) |
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{ |
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FPWV *base = (FPWV *)(info->start[0]); |
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/* Put FLASH back in read mode */ |
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) |
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*base = (FPW)0x00FF00FF; /* Intel Read Mode */ |
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else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) |
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*base = (FPW)0x00F000F0; /* AMD Read Mode */ |
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} |
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/*-----------------------------------------------------------------------
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*/ |
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static flash_info_t *flash_get_info(ulong base) |
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{ |
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int i; |
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flash_info_t * info; |
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) { |
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info = & flash_info[i]; |
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if (info->size && info->start[0] <= base && |
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base <= info->start[0] + info->size - 1) |
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break; |
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} |
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return i == CFG_MAX_FLASH_BANKS ? 0 : info; |
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} |
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/*-----------------------------------------------------------------------
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*/ |
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void flash_print_info (flash_info_t *info) |
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{ |
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int i; |
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if (info->flash_id == FLASH_UNKNOWN) { |
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printf ("missing or unknown FLASH type\n"); |
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return; |
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} |
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switch (info->flash_id & FLASH_VENDMASK) { |
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case FLASH_MAN_AMD: printf ("AMD "); break; |
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case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; |
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case FLASH_MAN_FUJ: printf ("FUJITSU "); break; |
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case FLASH_MAN_SST: printf ("SST "); break; |
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case FLASH_MAN_STM: printf ("STM "); break; |
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case FLASH_MAN_INTEL: printf ("INTEL "); break; |
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default: printf ("Unknown Vendor "); break; |
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} |
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switch (info->flash_id & FLASH_TYPEMASK) { |
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case FLASH_AM116DB: |
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printf ("AM29LV116DB (16Mbit, bottom boot sect)\n"); |
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break; |
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case FLASH_AMLV128U: |
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printf ("AM29LV128ML (128Mbit, uniform sector size)\n"); |
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break; |
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case FLASH_AM160B: |
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printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); |
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break; |
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default: |
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printf ("Unknown Chip Type\n"); |
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break; |
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} |
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printf (" Size: %ld MB in %d Sectors\n", |
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info->size >> 20, |
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info->sector_count); |
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printf (" Sector Start Addresses:"); |
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for (i=0; i<info->sector_count; ++i) { |
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if ((i % 5) == 0) { |
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printf ("\n "); |
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} |
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printf (" %08lX%s", |
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info->start[i], |
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info->protect[i] ? " (RO)" : " "); |
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} |
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printf ("\n"); |
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return; |
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} |
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/*-----------------------------------------------------------------------
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*/ |
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/*
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* The following code cannot be run from FLASH! |
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*/ |
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ulong flash_get_size (FPWV *addr, flash_info_t *info) |
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{ |
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int i; |
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ulong base = (ulong)addr; |
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/* Write auto select command: read Manufacturer ID */ |
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/* Write auto select command sequence and test FLASH answer */ |
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addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */ |
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addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */ |
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addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */ |
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/* The manufacturer codes are only 1 byte, so just use 1 byte.
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* This works for any bus width and any FLASH device width. |
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*/ |
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udelay(100); |
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switch (addr[0] & 0xff) { |
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case (uchar)AMD_MANUFACT: |
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debug ("Manufacturer: AMD (Spansion)\n"); |
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info->flash_id = FLASH_MAN_AMD; |
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break; |
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case (uchar)INTEL_MANUFACT: |
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debug ("Manufacturer: Intel (not supported yet)\n"); |
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info->flash_id = FLASH_MAN_INTEL; |
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break; |
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default: |
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info->flash_id = FLASH_UNKNOWN; |
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info->sector_count = 0; |
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info->size = 0; |
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break; |
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} |
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/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */ |
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if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[1]) { |
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case (uchar)AMD_ID_LV116DB: |
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debug ("Chip: AM29LV116DB\n"); |
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info->flash_id += FLASH_AM116DB; |
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info->sector_count = 35; |
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info->size = 0x00200000; |
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/*
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* The first 4 sectors are 16 kB, 8 kB, 8 kB and 32 kB, all |
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* the other ones are 64 kB |
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*/ |
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info->start[0] = base + 0x00000000; |
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info->start[1] = base + 0x00004000; |
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info->start[2] = base + 0x00006000; |
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info->start[3] = base + 0x00008000; |
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for( i = 4; i < info->sector_count; i++ ) |
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info->start[i] = |
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base + (i * (64 << 10)) - 0x00030000; |
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break; /* => 2 MB */ |
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case (FPW)AMD_ID_LV160B: |
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debug ("Chip: AM29LV160MB\n"); |
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info->flash_id += FLASH_AM160B; |
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info->sector_count = 35; |
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info->size = 0x00400000; |
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/*
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* The first 4 sectors are 16 kB, 8 kB, 8 kB and 32 kB, all |
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* the other ones are 64 kB |
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*/ |
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info->start[0] = base + 0x00000000; |
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info->start[1] = base + 0x00008000; |
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info->start[2] = base + 0x0000C000; |
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info->start[3] = base + 0x00010000; |
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for( i = 4; i < info->sector_count; i++ ) |
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info->start[i] = |
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base + (i * 2 * (64 << 10)) - 0x00060000; |
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break; /* => 4 MB */ |
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default: |
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info->flash_id = FLASH_UNKNOWN; |
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info->sector_count = 0; |
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info->size = 0; |
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} |
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/* Put FLASH back in read mode */ |
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flash_reset(info); |
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return (info->size); |
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} |
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/*-----------------------------------------------------------------------
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*/ |
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int flash_erase (flash_info_t *info, int s_first, int s_last) |
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{ |
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FPWV *addr = (FPWV*)(info->start[0]); |
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int flag, prot, sect, l_sect; |
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ulong start, now, last; |
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debug ("flash_erase: first: %d last: %d\n", s_first, s_last); |
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if ((s_first < 0) || (s_first > s_last)) { |
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if (info->flash_id == FLASH_UNKNOWN) { |
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printf ("- missing\n"); |
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} else { |
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printf ("- no sectors to erase\n"); |
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} |
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return 1; |
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} |
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if ((info->flash_id == FLASH_UNKNOWN) || |
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(info->flash_id > FLASH_AMD_COMP)) { |
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printf ("Can't erase unknown flash type %08lx - aborted\n", |
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info->flash_id); |
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return 1; |
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} |
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prot = 0; |
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for (sect=s_first; sect<=s_last; ++sect) { |
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if (info->protect[sect]) { |
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prot++; |
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} |
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} |
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if (prot) { |
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printf ("- Warning: %d protected sectors will not be erased!\n", |
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prot); |
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} else { |
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printf ("\n"); |
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} |
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l_sect = -1; |
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/* Disable interrupts which might cause a timeout here */ |
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flag = disable_interrupts(); |
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addr[0x0555] = (FPW)0x00AA00AA; |
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addr[0x02AA] = (FPW)0x00550055; |
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addr[0x0555] = (FPW)0x00800080; |
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addr[0x0555] = (FPW)0x00AA00AA; |
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addr[0x02AA] = (FPW)0x00550055; |
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/* Start erase on unprotected sectors */ |
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for (sect = s_first; sect<=s_last; sect++) { |
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if (info->protect[sect] == 0) { /* not protected */ |
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addr = (FPWV*)(info->start[sect]); |
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addr[0] = (FPW)0x00300030; |
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l_sect = sect; |
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} |
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} |
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/* re-enable interrupts if necessary */ |
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if (flag) |
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enable_interrupts(); |
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/* wait at least 80us - let's wait 1 ms */ |
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udelay (1000); |
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/*
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* We wait for the last triggered sector |
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*/ |
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if (l_sect < 0) |
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goto DONE; |
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start = get_timer (0); |
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last = start; |
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addr = (FPWV*)(info->start[l_sect]); |
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while ((addr[0] & (FPW)0x00800080) != (FPW)0x00800080) { |
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if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
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printf ("Timeout\n"); |
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return 1; |
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} |
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/* show that we're waiting */ |
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if ((now - last) > 1000) { /* every second */ |
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putc ('.'); |
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last = now; |
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} |
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} |
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DONE: |
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/* reset to read mode */ |
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addr = (FPWV*)info->start[0]; |
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addr[0] = (FPW)0x00F000F0; /* reset bank */ |
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printf (" done\n"); |
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return 0; |
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} |
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns: |
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* 0 - OK |
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* 1 - write timeout |
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* 2 - Flash not erased |
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*/ |
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int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
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{ |
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int i, rc = 0; |
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for (i = 0; i < cnt; i++) |
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if ((rc = write_word_amd(info, (FPW *)(addr+i), src[i])) != 0) { |
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return (rc); |
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} |
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return rc; |
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} |
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/*-----------------------------------------------------------------------
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* Write a word to Flash for AMD FLASH |
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* A word is 16 or 32 bits, whichever the bus width of the flash bank |
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* (not an individual chip) is. |
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* |
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* returns: |
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* 0 - OK |
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* 1 - write timeout |
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* 2 - Flash not erased |
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*/ |
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static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data) |
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{ |
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ulong start; |
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int flag; |
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FPWV *base; /* first address in flash bank */ |
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/* Check if Flash is (sufficiently) erased */ |
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if ((*dest & data) != data) { |
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|
return (2); |
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|
} |
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|
base = (FPWV *)(info->start[0]); |
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|
/* Disable interrupts which might cause a timeout here */ |
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flag = disable_interrupts(); |
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base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */ |
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base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */ |
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base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */ |
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*dest = data; /* start programming the data */ |
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|
/* re-enable interrupts if necessary */ |
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|
if (flag) |
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|
enable_interrupts(); |
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|
start = get_timer (0); |
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|
/* data polling for D7 */ |
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|
while ((*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) { |
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|
|
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
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|
|
*dest = (FPW)0x00F000F0; /* reset bank */ |
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|
|
return (1); |
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|
|
} |
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|
} |
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|
return (0); |
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|
} |
Wolfgang Denk
18 years ago