561 lines
13 KiB
C
561 lines
13 KiB
C
/*
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* (C) Copyright 2000
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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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#include <common.h>
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#include <mpc8xx.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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#if defined(CONFIG_ENV_IS_IN_FLASH)
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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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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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#endif
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#define QUAD_ID(id) ((((ulong)(id) & 0xFF) << 24) | \
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(((ulong)(id) & 0xFF) << 16) | \
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(((ulong)(id) & 0xFF) << 8) | \
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(((ulong)(id) & 0xFF) << 0) \
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)
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/*-----------------------------------------------------------------------
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* Functions
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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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/*-----------------------------------------------------------------------
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*/
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unsigned long 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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vu_long *bcsr = (vu_long *)BCSR_ADDR;
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unsigned long pd_size, total_size, bsize, or_am;
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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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flash_info[i].flash_id = FLASH_UNKNOWN;
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flash_info[i].size = 0;
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flash_info[i].sector_count = 0;
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flash_info[i].start[0] = 0xFFFFFFFF; /* For TFTP */
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}
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switch ((bcsr[2] & BCSR2_FLASH_PD_MASK) >> BCSR2_FLASH_PD_SHIFT) {
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case 2:
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case 4:
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case 6:
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pd_size = 0x800000;
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or_am = 0xFF800000;
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break;
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case 5:
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case 7:
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pd_size = 0x400000;
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or_am = 0xFFC00000;
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break;
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case 8:
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pd_size = 0x200000;
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or_am = 0xFFE00000;
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break;
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default:
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pd_size = 0;
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or_am = 0xFFE00000;
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printf("## Unsupported flash detected by BCSR: 0x%08lX\n", bcsr[2]);
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}
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total_size = 0;
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS && total_size < pd_size; ++i) {
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bsize = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + total_size),
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&flash_info[i]);
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if (flash_info[i].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
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i, bsize, bsize >> 20);
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}
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total_size += bsize;
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}
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if (total_size != pd_size) {
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printf("## Detected flash size %lu conflicts with PD data %lu\n",
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total_size, pd_size);
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}
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/* Remap FLASH according to real size */
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memctl->memc_or0 = or_am | CONFIG_SYS_OR_TIMING_FLASH;
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) {
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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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if (CONFIG_SYS_MONITOR_BASE >= flash_info[i].start[0])
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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[i]);
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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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if (CONFIG_ENV_ADDR >= flash_info[i].start[0])
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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[i]);
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#endif
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}
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return total_size;
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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:
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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_AM040:
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printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
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break;
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case FLASH_AM080:
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printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n");
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break;
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case FLASH_AM400B:
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printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM400T:
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printf ("AM29LV400T (4 Mbit, top boot sector)\n");
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break;
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case FLASH_AM800B:
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printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
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break;
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case FLASH_AM800T:
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printf ("AM29LV800T (8 Mbit, top boot sector)\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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case FLASH_AM160T:
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printf ("AM29LV160T (16 Mbit, top boot sector)\n");
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break;
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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], info->protect[i] ? " (RO)" : " ");
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}
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printf ("\n");
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}
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/*-----------------------------------------------------------------------
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* The following code can not run from flash!
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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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/* Write auto select command: read Manufacturer ID */
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addr[0x0555] = 0xAAAAAAAA;
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addr[0x02AA] = 0x55555555;
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addr[0x0555] = 0x90909090;
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switch (addr[0]) {
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case QUAD_ID(AMD_MANUFACT):
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info->flash_id = FLASH_MAN_AMD;
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break;
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case QUAD_ID(FUJ_MANUFACT):
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info->flash_id = FLASH_MAN_FUJ;
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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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switch (addr[1]) { /* device ID */
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case QUAD_ID(AMD_ID_F040B):
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case QUAD_ID(AMD_ID_LV040B):
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case QUAD_ID(AMD_ID_F080B):
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info->flash_id += FLASH_AM080;
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info->sector_count = 16;
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info->size = 0x00400000;
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break; /* => 4 MB */
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#if 0
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case AMD_ID_LV400T:
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info->flash_id += FLASH_AM400T;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV400B:
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info->flash_id += FLASH_AM400B;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV800T:
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info->flash_id += FLASH_AM800T;
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info->sector_count = 19;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case AMD_ID_LV800B:
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info->flash_id += FLASH_AM800B;
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info->sector_count = 19;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case AMD_ID_LV160T:
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info->flash_id += FLASH_AM160T;
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info->sector_count = 35;
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info->size = 0x00400000;
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break; /* => 4 MB */
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case AMD_ID_LV160B:
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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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break; /* => 4 MB */
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case AMD_ID_LV320T:
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info->flash_id += FLASH_AM320T;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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case AMD_ID_LV320B:
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info->flash_id += FLASH_AM320B;
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info->sector_count = 67;
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info->size = 0x00800000;
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break; /* => 8 MB */
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#endif /* 0 */
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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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#if 0
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/* set up sector start address table */
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if (info->flash_id & FLASH_BTYPE) {
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/* set sector offsets for bottom boot block type */
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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] = base + (i * 0x00020000) - 0x00060000;
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}
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} else {
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/* set sector offsets for top boot block type */
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i = info->sector_count - 1;
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info->start[i--] = base + info->size - 0x00008000;
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info->start[i--] = base + info->size - 0x0000C000;
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info->start[i--] = base + info->size - 0x00010000;
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for (; i >= 0; i--) {
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info->start[i] = base + i * 0x00020000;
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}
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}
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#else
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/* set sector offsets for uniform sector type */
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = (ulong)addr + (i * 0x00040000);
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#endif
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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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 long *) (info->start[i]);
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info->protect[i] = addr[2] & 1;
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}
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if (info->flash_id != FLASH_UNKNOWN) {
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addr = (volatile unsigned long *) info->start[0];
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*addr = 0xF0F0F0F0; /* 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 flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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vu_long *addr = (vu_long *) (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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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 ERR_INVAL;
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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 - aborted\n");
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return ERR_UNKNOWN_FLASH_TYPE;
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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", 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] = 0xAAAAAAAA;
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addr[0x02AA] = 0x55555555;
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addr[0x0555] = 0x80808080;
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addr[0x0555] = 0xAAAAAAAA;
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addr[0x02AA] = 0x55555555;
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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 = (vu_long *) (info->start[sect]);
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addr[0] = 0x30303030;
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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 = (vu_long *) (info->start[l_sect]);
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while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
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{
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if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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return ERR_TIMOUT;
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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 = (volatile unsigned long *) info->start[0];
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addr[0] = 0xF0F0F0F0; /* 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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ulong cp, wp, data;
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int i, l, rc;
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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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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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* 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 write_word (flash_info_t * info, ulong dest, 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;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((vu_long *) dest) & data) != data) {
|
|
return ERR_NOT_ERASED;
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
addr[0x0555] = 0xAAAAAAAA;
|
|
addr[0x02AA] = 0x55555555;
|
|
addr[0x0555] = 0xA0A0A0A0;
|
|
|
|
*((vu_long *) dest) = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((*((vu_long *) dest) & 0x80808080) != (data & 0x80808080))
|
|
{
|
|
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
return ERR_TIMOUT;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|