502 lines
13 KiB
C
502 lines
13 KiB
C
/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.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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/******************************************************************************
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** Notes: AM29LV320DB - 90EI ( 32 Mbit device )
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** Sectors - Eight 8 Kb sector
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** - Sixty three 64 Kb sector
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** Bottom boot sector
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******************************************************************************/
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#include <common.h>
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#include <mpc8xx.h>
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/******************************************************************************
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** Defines
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******************************************************************************/
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#ifdef CONFIG_ADDERII
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#define ADDR0 0x0555
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#define ADDR1 0x02AA
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#define FLASH_WORD_SIZE unsigned short
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#endif
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#if defined( CFG_ENV_IS_IN_FLASH )
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# ifndef CFG_ENV_ADDR
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# define CFG_ENV_ADDR ( CFG_FLASH_BASE + CFG_ENV_OFFSET )
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# endif
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# ifndef CFG_ENV_SIZE
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# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
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# endif
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# ifndef CFG_ENV_SECT_SIZE
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# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
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# endif
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#endif
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/******************************************************************************
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** Global Parameters
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******************************************************************************/
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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/******************************************************************************
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** Function Prototypes
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******************************************************************************/
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static ulong flash_get_size( vu_long *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 void flash_get_offsets( ulong base, flash_info_t *info );
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int wait_for_DQ7( flash_info_t *info, int sect );
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/******************************************************************************
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** Function : flash_init
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** Param : void
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** Notes : Initializes the Flash Chip
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******************************************************************************/
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ulong flash_init (void)
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{
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ulong size_b0 = -1;
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int i;
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volatile immap_t *immap = (immap_t *) CFG_IMMR;
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volatile memctl8xx_t *memctl = &immap->im_memctl;
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/* Set Flash to unknown */
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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/* Get the Flash Bank Size */
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size_b0 = flash_get_size ((vu_long *) (CFG_FLASH_BASE),
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&flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## UNKNOWN Flash on Bank 0 - Size = 0x%08lx = %ldMB\n",
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size_b0, size_b0 >> 20);
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}
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/* Remap Flash according to size detected */
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memctl->memc_or0 = 0xFF800774;
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memctl->memc_br0 = CFG_BR0_PRELIM;
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/* Setup Flash Sector Offsets */
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flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
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/* Monitor Protection ON - default */
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#if ( CFG_MONITOR_BASE >= CFG_FLASH_BASE )
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flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,
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(CFG_MONITOR_BASE + monitor_flash_len - 1),
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&flash_info[0]);
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#endif
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/* Protect Environment Variables */
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#ifdef CFG_ENV_IS_IN_FLASH
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flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR,
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(CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]);
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#endif
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return size_b0;
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}
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/******************************************************************************
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** Function : flash_get_offsets
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** Param : ulong base, flash_into_t *info
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** Notes :
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******************************************************************************/
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static void flash_get_offsets (ulong base, flash_info_t * info)
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{
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return;
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}
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/******************************************************************************
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** Function : flash_print_info
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** Param : flash_info_t
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** Notes :
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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:
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printf ("AMD ");
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break;
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case FLASH_MAN_FUJ:
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printf ("FUJITSU ");
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break;
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case FLASH_MAN_BM:
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printf ("BRIGHT MICRO ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM320B:
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printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM320T:
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printf ("AM29LV320T (32 Mbit, top boot sector)\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", 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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** Function : flash_get_size
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** Param : vu_long *addr, flash_info_t *info
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** Notes :
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******************************************************************************/
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static ulong flash_get_size (vu_long * addr, flash_info_t * info)
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{
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short i;
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FLASH_WORD_SIZE manu_id, dev_id;
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ulong base = (ulong) addr;
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volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
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/* Write Auto Select Command and read Manufacturer's ID and Dev ID */
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;
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addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;
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manu_id = addr2[0];
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switch (manu_id) {
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case (FLASH_WORD_SIZE) AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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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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/* Read Device Id */
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dev_id = addr2[1];
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switch (dev_id) {
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case (FLASH_WORD_SIZE) AMD_ID_LV320B:
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info->flash_id += FLASH_AM320B;
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info->sector_count = 71; /* 8 - boot sec + 63 normal */
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info->size = 0x400000; /* 4MByte */
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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break;
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}
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/* Set up sector start Addresses */
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if (info->flash_id & FLASH_BTYPE) {
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/* set sector offsets for bottom boot block
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** Eight 8 Kb Boot sectors
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** Sixty Three 64Kb sectors
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*/
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for (i = 0; i < 8; i++) {
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info->start[i] = base + (i * 0x00002000);
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}
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for (i = 8; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x00010000) - 0x00070000;
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}
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}
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/* Reset To read mode */
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if (info->flash_id != FLASH_UNKNOWN) {
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addr = (ulong *) info->start[0];
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*addr = 0xF0F0F0F0;
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}
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return (info->size);
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}
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/*******************************************************************************
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** Function : flash_erase
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** Param : flash_info_t *info, int s_first, int s_last
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** Notes :
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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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volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
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volatile FLASH_WORD_SIZE *addr2;
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int flag, prot, sect, l_sect;
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int i;
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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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printf ("Can't erase unknown flash type - aborted\n");
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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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/* 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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addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
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if ((info->flash_id & FLASH_VENDMASK) ==
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FLASH_MAN_SST) {
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
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addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
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for (i = 0; i < 50; i++)
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udelay (1000); /* wait 1 ms */
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} else {
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
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addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
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addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
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}
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l_sect = sect;
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/*
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* Wait for each sector to complete, it's more
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* reliable. According to AMD Spec, you must
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* issue all erase commands within a specified
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* timeout. This has been seen to fail, especially
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* if printf()s are included (for debug)!!
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*/
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wait_for_DQ7 (info, 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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/* reset to read mode */
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addr = (FLASH_WORD_SIZE *) info->start[0];
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addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
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printf (" done\n");
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return 0;
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}
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int wait_for_DQ7 (flash_info_t * info, int sect)
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{
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ulong start, now, last;
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volatile FLASH_WORD_SIZE *addr =
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(FLASH_WORD_SIZE *) (info->start[sect]);
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start = get_timer (0);
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last = start;
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while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
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(FLASH_WORD_SIZE) 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) {
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putc ('.');
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last = now;
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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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** Function : write_buff
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** Param : flash_info_t *info, uchar *src, ulong addr, ulong cnt
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** Notes :
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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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ulong cp, wp, data;
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int i, l, rc;
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/* get lower word aligned address */
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wp = (addr & ~3);
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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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data = 0;
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for (i = 0, cp = wp; i < l; ++i, ++cp) {
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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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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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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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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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data = 0;
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for (i = 0; i < 4; ++i) {
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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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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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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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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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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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** Function : write_word
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** Param : flash_info_t *info, ulong dest, ulong data
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** Notes :
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******************************************************************************/
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static int write_word (flash_info_t * info, ulong dest, ulong data)
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{
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volatile FLASH_WORD_SIZE *addr2 =
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(FLASH_WORD_SIZE *) (info->start[0]);
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volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
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volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
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ulong start;
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int i;
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/* Check if Flash is (sufficiently) erased */
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if ((*((volatile FLASH_WORD_SIZE *) dest) &
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(FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
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return (2);
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}
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for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
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int flag;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts ();
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
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addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
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dest2[i] = data2[i];
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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 ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
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(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
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if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
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return (1);
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}
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}
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}
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return (0);
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}
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