mirror of
https://github.com/AsahiLinux/u-boot
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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
602 lines
13 KiB
C
602 lines
13 KiB
C
/*
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**=====================================================================
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**
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** Copyright (C) 2000, 2001, 2002, 2003
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** The LEOX team <team@leox.org>, http://www.leox.org
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**
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** LEOX.org is about the development of free hardware and software resources
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** for system on chip.
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**
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** Description: U-Boot port on the LEOX's ELPT860 CPU board
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** ~~~~~~~~~~~
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**
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**=====================================================================
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**
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* SPDX-License-Identifier: GPL-2.0+
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**
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**=====================================================================
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*/
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/*
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** Note 1: In this file, you have to provide the following variable:
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** ------
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** flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]
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** 'flash_info_t' structure is defined into 'include/flash.h'
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** and defined as extern into 'common/cmd_flash.c'
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**
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** Note 2: In this file, you have to provide the following functions:
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** ------
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** unsigned long flash_init(void)
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** called from 'board_init_r()' into 'common/board.c'
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**
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** void flash_print_info(flash_info_t *info)
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** called from 'do_flinfo()' into 'common/cmd_flash.c'
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**
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** int flash_erase(flash_info_t *info,
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** int s_first,
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** int s_last)
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** called from 'do_flerase()' & 'flash_sect_erase()' into 'common/cmd_flash.c'
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**
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** int write_buff (flash_info_t *info,
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** uchar *src,
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** ulong addr,
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** ulong cnt)
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** called from 'flash_write()' into 'common/cmd_flash.c'
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*/
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#include <common.h>
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#include <mpc8xx.h>
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#ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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#endif
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Internal Functions
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*/
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static void flash_get_offsets (ulong base, flash_info_t *info);
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static ulong flash_get_size (volatile unsigned char *addr, flash_info_t *info);
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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static int write_byte (flash_info_t *info, ulong dest, uchar data);
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/*-----------------------------------------------------------------------
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*/
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unsigned long
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flash_init (void)
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{
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volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
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volatile memctl8xx_t *memctl = &immap->im_memctl;
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unsigned long size_b0;
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
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{
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Static FLASH Bank configuration here - FIXME XXX */
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size_b0 = flash_get_size ((volatile unsigned char *)FLASH_BASE0_PRELIM,
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&flash_info[0]);
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if ( flash_info[0].flash_id == FLASH_UNKNOWN )
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{
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b0, size_b0<<20);
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}
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/* Remap FLASH according to real size */
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memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
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memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_PS_8 | BR_V;
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/* Re-do sizing to get full correct info */
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size_b0 = flash_get_size ((volatile unsigned char *)CONFIG_SYS_FLASH_BASE,
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&flash_info[0]);
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flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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/* monitor protection ON by default */
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flash_protect (FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE + monitor_flash_len-1,
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&flash_info[0]);
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#endif
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#ifdef CONFIG_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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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR + CONFIG_ENV_SIZE-1,
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&flash_info[0]);
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#endif
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flash_info[0].size = size_b0;
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return (size_b0);
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}
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/*-----------------------------------------------------------------------
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*/
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static void
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flash_get_offsets (ulong base,
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flash_info_t *info)
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{
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int i;
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#define SECTOR_64KB 0x00010000
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/* set up sector start adress table */
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for (i = 0; i < info->sector_count; i++)
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{
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info->start[i] = base + (i * SECTOR_64KB);
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}
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}
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/*-----------------------------------------------------------------------
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*/
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void
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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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{
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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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{
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case FLASH_MAN_AMD: printf ("AMD "); break;
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case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
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case FLASH_MAN_STM: printf ("STM (Thomson) "); 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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{
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case FLASH_AM040: printf ("AM29F040 (4 Mbits)\n");
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break;
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default: printf ("Unknown Chip Type\n");
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break;
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}
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printf (" Size: %ld KB in %d Sectors\n",
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info->size >> 10, 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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{
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if ((i % 5) == 0)
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printf ("\n ");
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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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}
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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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*/
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/*
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* The following code cannot be run from FLASH!
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*/
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static ulong
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flash_get_size (volatile unsigned char *addr,
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flash_info_t *info)
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{
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short i;
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uchar value;
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ulong base = (ulong)addr;
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/* Write auto select command: read Manufacturer ID */
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addr[0x0555] = 0xAA;
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addr[0x02AA] = 0x55;
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addr[0x0555] = 0x90;
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value = addr[0];
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switch ( value )
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{
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/* case AMD_MANUFACT: */
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case 0x01:
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info->flash_id = FLASH_MAN_AMD;
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break;
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/* case FUJ_MANUFACT: */
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case 0x04:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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/* case STM_MANUFACT: */
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case 0x20:
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info->flash_id = FLASH_MAN_STM;
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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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return (0); /* no or unknown flash */
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}
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value = addr[1]; /* device ID */
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switch ( value )
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{
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case STM_ID_F040B:
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case AMD_ID_F040B:
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info->flash_id += FLASH_AM040; /* 4 Mbits = 512k * 8 */
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info->sector_count = 8;
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info->size = 0x00080000;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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return (0); /* => no or unknown flash */
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}
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/* set up sector start adress table */
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for (i = 0; i < info->sector_count; i++)
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{
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info->start[i] = base + (i * 0x00010000);
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}
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++)
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{
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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addr = (volatile unsigned char *)(info->start[i]);
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info->protect[i] = addr[2] & 1;
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}
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/*
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* Prevent writes to uninitialized FLASH.
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*/
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if ( info->flash_id != FLASH_UNKNOWN )
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{
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addr = (volatile unsigned char *)info->start[0];
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*addr = 0xF0; /* reset bank */
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}
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return (info->size);
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}
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/*-----------------------------------------------------------------------
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*/
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int
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flash_erase (flash_info_t *info,
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int s_first,
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int s_last)
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{
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volatile unsigned char *addr = (volatile unsigned char *)(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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if ( (s_first < 0) || (s_first > s_last) )
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{
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if ( info->flash_id == FLASH_UNKNOWN )
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{
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printf ("- missing\n");
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}
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else
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{
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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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{
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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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{
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if ( info->protect[sect] )
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{
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prot++;
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}
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}
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if ( prot )
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{
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printf ("- Warning: %d protected sectors will not be erased!\n", prot);
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}
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else
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{
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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] = 0xAA;
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addr[0x02AA] = 0x55;
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addr[0x0555] = 0x80;
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addr[0x0555] = 0xAA;
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addr[0x02AA] = 0x55;
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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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{
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if (info->protect[sect] == 0) /* not protected */
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{
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addr = (volatile unsigned char *)(info->start[sect]);
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addr[0] = 0x30;
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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 = (volatile unsigned char *)(info->start[l_sect]);
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while ( (addr[0] & 0x80) != 0x80 )
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{
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if ( (now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT )
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{
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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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{
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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 = (volatile unsigned char *)info->start[0];
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addr[0] = 0xF0; /* 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
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write_buff (flash_info_t *info,
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uchar *src,
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ulong addr,
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ulong cnt)
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{
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ulong cp, wp, data;
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uchar bdata;
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int i, l, rc;
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if ( (info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 )
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{
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/* Width of the data bus: 8 bits */
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wp = addr;
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while ( cnt )
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{
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bdata = *src++;
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if ( (rc = write_byte(info, wp, bdata)) != 0 )
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{
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return (rc);
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}
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++wp;
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--cnt;
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}
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return ( 0 );
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}
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else
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{
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/* Width of the data bus: 32 bits */
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wp = (addr & ~3); /* get lower word aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ( (l = addr - wp) != 0 )
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{
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data = 0;
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for (i=0, cp=wp; i<l; ++i, ++cp)
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{
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data = (data << 8) | (*(uchar *)cp);
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}
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for (; i<4 && cnt>0; ++i)
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{
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data = (data << 8) | *src++;
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--cnt;
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++cp;
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}
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for (; cnt==0 && i<4; ++i, ++cp)
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{
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data = (data << 8) | (*(uchar *)cp);
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}
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if ( (rc = write_word(info, wp, data)) != 0 )
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{
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return (rc);
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}
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wp += 4;
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}
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/*
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* handle word aligned part
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*/
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while ( cnt >= 4 )
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{
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data = 0;
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for (i=0; i<4; ++i)
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{
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data = (data << 8) | *src++;
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}
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if ( (rc = write_word(info, wp, data)) != 0 )
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{
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return (rc);
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}
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wp += 4;
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cnt -= 4;
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}
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if ( cnt == 0 )
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{
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return (0);
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}
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/*
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* handle unaligned tail bytes
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*/
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data = 0;
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for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp)
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{
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data = (data << 8) | *src++;
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--cnt;
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}
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for (; i<4; ++i, ++cp)
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{
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data = (data << 8) | (*(uchar *)cp);
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}
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return (write_word(info, wp, data));
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}
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}
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/*-----------------------------------------------------------------------
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* Write a word 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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static int
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write_word (flash_info_t *info,
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ulong dest,
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ulong data)
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{
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vu_long *addr = (vu_long*)(info->start[0]);
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ulong start;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if ( (*((vu_long *)dest) & data) != data )
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{
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return (2);
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}
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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] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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addr[0x0555] = 0x00A000A0;
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*((vu_long *)dest) = 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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/* data polling for D7 */
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start = get_timer (0);
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while ( (*((vu_long *)dest) & 0x00800080) != (data & 0x00800080) )
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{
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if ( get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT )
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{
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return (1);
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}
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}
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return (0);
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}
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/*-----------------------------------------------------------------------
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* Write a byte 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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static int
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write_byte (flash_info_t *info,
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ulong dest,
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uchar data)
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{
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volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
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ulong start;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if ( (*((volatile unsigned char *)dest) & data) != data )
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{
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return (2);
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}
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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] = 0xAA;
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addr[0x02AA] = 0x55;
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addr[0x0555] = 0xA0;
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*((volatile unsigned char *)dest) = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if ( flag )
|
|
enable_interrupts();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ( (*((volatile unsigned char *)dest) & 0x80) != (data & 0x80) )
|
|
{
|
|
if ( get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT )
|
|
{
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|