465 lines
11 KiB
C
465 lines
11 KiB
C
/*
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* (C) Copyright 2001
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* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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*
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* (C) Copyright 2001
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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[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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extern u_long *my_sernum; /* from nx823.c */
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/*-----------------------------------------------------------------------
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* Protection Flags:
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*/
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#define FLAG_PROTECT_SET 0x01
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#define FLAG_PROTECT_CLEAR 0x02
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/* Board support for 1 or 2 flash devices */
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#undef FLASH_PORT_WIDTH32
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#define FLASH_PORT_WIDTH16
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#ifdef FLASH_PORT_WIDTH16
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#define FLASH_PORT_WIDTH ushort
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#define FLASH_PORT_WIDTHV vu_short
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#else
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#define FLASH_PORT_WIDTH ulong
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#define FLASH_PORT_WIDTHV vu_long
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#endif
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#define FPW FLASH_PORT_WIDTH
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#define FPWV FLASH_PORT_WIDTHV
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size (FPW *addr, flash_info_t *info);
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static int write_data (flash_info_t *info, ulong dest, FPW data);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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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 *)CFG_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<CFG_MAX_FLASH_BANKS; ++i) {
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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((FPW *)FLASH_BASE0_PRELIM, &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 = %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 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
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memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
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/* Re-do sizing to get full correct info */
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size_b0 = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]);
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flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
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/* monitor protection ON by default */
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(void)flash_protect(FLAG_PROTECT_SET,
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CFG_FLASH_BASE,
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CFG_FLASH_BASE+monitor_flash_len-1,
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&flash_info[0]);
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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 flash_get_offsets (ulong base, 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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return;
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}
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
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for (i = 0; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x00020000);
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}
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}
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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_INTEL: printf ("INTEL "); break;
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default: printf ("Unknown Vendor "); break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_28F320J3A:
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printf ("28F320J3A\n"); break;
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case FLASH_28F640J3A:
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printf ("28F640J3A\n"); break;
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case FLASH_28F128J3A:
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printf ("28F128J3A\n"); break;
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default: printf ("Unknown Chip Type\n"); break;
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}
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, 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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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 flash_get_size (FPW *addr, flash_info_t *info)
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{
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FPW value;
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/* Write auto select command: read Manufacturer ID */
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addr[0x5555] = (FPW)0x00AA00AA;
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addr[0x2AAA] = (FPW)0x00550055;
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addr[0x5555] = (FPW)0x00900090;
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value = addr[0];
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switch (value) {
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case (FPW)INTEL_MANUFACT:
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info->flash_id = FLASH_MAN_INTEL;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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addr[0] = (FPW)0x00FF00FF; /* restore read mode */
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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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case (FPW)INTEL_ID_28F320J3A:
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info->flash_id += FLASH_28F320J3A;
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info->sector_count = 32;
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info->size = 0x00400000;
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break; /* => 4 MB */
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case (FPW)INTEL_ID_28F640J3A:
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info->flash_id += FLASH_28F640J3A;
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info->sector_count = 64;
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info->size = 0x00800000;
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break; /* => 8 MB */
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case (FPW)INTEL_ID_28F128J3A:
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 0x01000000;
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break; /* => 16 MB */
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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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if (info->sector_count > CFG_MAX_FLASH_SECT) {
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printf ("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CFG_MAX_FLASH_SECT);
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info->sector_count = CFG_MAX_FLASH_SECT;
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}
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addr[0] = (FPW)0x00FF00FF; /* restore read mode */
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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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int flag, prot, sect;
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ulong type, start, now, last;
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int rcode = 0;
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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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type = (info->flash_id & FLASH_VENDMASK);
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if ((type != FLASH_MAN_INTEL)) {
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printf ("Can't erase unknown flash type %08lx - aborted\n",
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info->flash_id);
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return 1;
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}
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prot = 0;
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for (sect=s_first; sect<=s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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start = get_timer (0);
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last = start;
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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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FPWV *addr = (FPWV *)(info->start[sect]);
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FPW status;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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*addr = (FPW)0x00500050; /* clear status register */
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*addr = (FPW)0x00200020; /* erase setup */
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*addr = (FPW)0x00D000D0; /* erase confirm */
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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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while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
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if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
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printf ("Timeout\n");
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*addr = (FPW)0x00B000B0; /* suspend erase */
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*addr = (FPW)0x00FF00FF; /* reset to read mode */
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rcode = 1;
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break;
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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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*addr = (FPW)0x00FF00FF; /* reset to read mode */
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printf (" done\n");
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}
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}
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return rcode;
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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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* 4 - Flash not identified
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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;
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FPW data;
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int count, i, l, rc, port_width;
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if (info->flash_id == FLASH_UNKNOWN) {
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return 4;
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}
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/* get lower word aligned address */
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#ifdef FLASH_PORT_WIDTH16
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wp = (addr & ~1);
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port_width = 2;
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#else
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wp = (addr & ~3);
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port_width = 4;
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#endif
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/* save sernum if needed */
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if (addr >= CFG_FLASH_SN_SECTOR && addr < CFG_FLASH_SN_BASE)
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{
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u_long dest = CFG_FLASH_SN_BASE;
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u_short *sn = (u_short *)my_sernum;
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printf("(saving sernum)");
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for (i=0; i<4; i++)
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{
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if ((rc = write_data(info, dest, sn[i])) != 0) {
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return (rc);
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}
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dest += port_width;
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}
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}
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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<port_width && 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<port_width; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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if ((rc = write_data(info, wp, data)) != 0) {
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return (rc);
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}
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wp += port_width;
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}
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/*
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* handle word aligned part
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*/
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count = 0;
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while (cnt >= port_width) {
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data = 0;
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for (i=0; i<port_width; ++i) {
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data = (data << 8) | *src++;
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}
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if ((rc = write_data(info, wp, data)) != 0) {
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return (rc);
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}
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wp += port_width;
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cnt -= port_width;
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if (count++ > 0x800)
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{
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putc('.');
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count = 0;
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}
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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<port_width && 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<port_width; ++i, ++cp) {
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data = (data << 8) | (*(uchar *)cp);
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}
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return (write_data(info, wp, data));
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}
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/*-----------------------------------------------------------------------
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* Write a word or halfword 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_data (flash_info_t *info, ulong dest, FPW data)
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{
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FPWV *addr = (FPWV *)dest;
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ulong status;
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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 ((*addr & data) != data) {
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printf("not erased at %08lx (%x)\n",(ulong)addr,*addr);
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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 = (FPW)0x00400040; /* write setup */
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*addr = data;
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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start = get_timer (0);
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while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
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if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
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*addr = (FPW)0x00FF00FF; /* restore read mode */
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return (1);
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}
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}
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*addr = (FPW)0x00FF00FF; /* restore read mode */
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return (0);
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}
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