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![Wolfgang Denk](/assets/img/avatar_default.png)
Fix warning: flash.c:531: warning: dereferencing type-punned pointer will break strict-aliasing rules Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Kári Davíðsson <kd@flaga.is>
704 lines
15 KiB
C
704 lines
15 KiB
C
/*
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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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#include <flash.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Functions
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*/
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ulong flash_recognize (vu_long *base);
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int write_word (flash_info_t *info, ulong dest, ulong data);
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void flash_get_geometry (vu_long *base, flash_info_t *info);
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void flash_unprotect(flash_info_t *info);
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int _flash_real_protect(flash_info_t *info, long idx, int on);
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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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int i;
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int rec;
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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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}
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*((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
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flash_get_geometry ((vu_long*)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
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/* Remap FLASH according to real size */
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memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-flash_info[0].size & 0xFFFF8000);
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memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
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(memctl->memc_br0 & ~(BR_BA_MSK));
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rec = flash_recognize((vu_long*)CONFIG_SYS_FLASH_BASE);
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if (rec == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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flash_info[0].size, flash_info[0].size<<20);
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}
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#if CONFIG_SYS_FLASH_PROTECTION
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/*Unprotect all the flash memory*/
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flash_unprotect(&flash_info[0]);
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#endif
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*((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
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return (flash_info[0].size);
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#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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/* monitor protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[0]);
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#endif
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#ifdef CONFIG_ENV_IS_IN_FLASH
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/* ENV protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_OFFSET,
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CONFIG_ENV_OFFSET+CONFIG_ENV_SIZE-1,
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&flash_info[0]);
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#endif
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return (flash_info[0].size);
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}
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int flash_get_protect_status(flash_info_t * info, long idx)
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{
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vu_short * base;
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ushort res;
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#ifdef DEBUG
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printf("\n Attempting to set protection info with %d sectors\n", info->sector_count);
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#endif
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base = (vu_short*)info->start[idx];
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*(base) = 0xffff;
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*(base + 0x55) = 0x0098;
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res = base[0x2];
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*(base) = 0xffff;
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if(res != 0)
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res = 1;
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else
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res = 0;
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return res;
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}
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void flash_get_geometry (vu_long *base, flash_info_t *info)
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{
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int i,j;
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ulong ner = 0;
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vu_short * sb = (vu_short*)base;
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ulong offset = (ulong)base;
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/* Read Device geometry */
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*sb = 0xffff;
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*sb = 0x0090;
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info->flash_id = ((ulong)base[0x0]);
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#ifdef DEBUG
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printf("Id is %x\n", (uint)(ulong)info->flash_id);
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#endif
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*sb = 0xffff;
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*(sb+0x55) = 0x0098;
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info->size = 1 << (sb[0x27]); /* Read flash size */
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#ifdef DEBUG
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printf("Size is %x\n", (uint)(ulong)info->size);
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#endif
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*sb = 0xffff;
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*(sb + 0x55) = 0x0098;
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ner = sb[0x2c] ; /*Number of erase regions*/
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#ifdef DEBUG
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printf("Number of erase regions %x\n", (uint)ner);
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#endif
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info->sector_count = 0;
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for(i = 0; i < ner; i++)
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{
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uint s;
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uint count;
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uint t1,t2,t3,t4;
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*sb = 0xffff;
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*(sb + 0x55) = 0x0098;
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t1 = sb[0x2d + i*4];
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t2 = sb[0x2e + i*4];
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t3 = sb[0x2f + i*4];
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t4 = sb[0x30 + i*4];
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count = ((t1 & 0x00ff) | (((t2 & 0x00ff) << 8) & 0xff00) )+ 1; /*sector count*/
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s = ((t3 & 0x00ff) | (((t4 & 0x00ff) << 8) & 0xff00)) * 256;; /*Sector size*/
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#ifdef DEBUG
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printf("count and size %x, %x\n", count, s);
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printf("sector count for erase region %d is %d\n", i, count);
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#endif
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for(j = 0; j < count; j++)
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{
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#ifdef DEBUG
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printf("%x, ", (uint)offset);
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#endif
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info->start[ info->sector_count + j] = offset;
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offset += s;
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}
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info->sector_count += count;
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}
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if ((offset - (ulong)base) != info->size)
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printf("WARNING reported size %x does not match to calculted size %x.\n"
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, (uint)info->size, (uint)(offset - (ulong)base) );
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/* Next check if there are any sectors protected.*/
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for(i = 0; i < info->sector_count; i++)
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info->protect[i] = flash_get_protect_status(info, i);
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*sb = 0xffff;
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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 INTEL_MANUFACT & FLASH_VENDMASK:
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printf ("Intel ");
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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 INTEL_ID_28F320C3B & FLASH_TYPEMASK:
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printf ("28F320RC3(4 MB)\n");
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break;
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case INTEL_ID_28F320J3A:
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printf("28F320J3A (4 MB)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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break;
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}
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, 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 % 4) == 0)
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printf ("\n ");
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printf (" %02d %08lX%s",
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i, info->start[i],
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info->protect[i]!=0 ? " (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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ulong flash_recognize (vu_long *base)
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{
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ulong id;
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ulong res = FLASH_UNKNOWN;
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vu_short * sb = (vu_short*)base;
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*sb = 0xffff;
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*sb = 0x0090;
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id = base[0];
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switch (id & 0x00FF0000)
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{
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case (MT_MANUFACT & 0x00FF0000): /* MT or => Intel */
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case (INTEL_ALT_MANU & 0x00FF0000):
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res = FLASH_MAN_INTEL;
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break;
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default:
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res = FLASH_UNKNOWN;
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}
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*sb = 0xffff;
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return res;
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}
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/*-----------------------------------------------------------------------*/
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#define INTEL_FLASH_STATUS_BLS 0x02
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#define INTEL_FLASH_STATUS_PSS 0x04
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#define INTEL_FLASH_STATUS_VPPS 0x08
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#define INTEL_FLASH_STATUS_PS 0x10
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#define INTEL_FLASH_STATUS_ES 0x20
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#define INTEL_FLASH_STATUS_ESS 0x40
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#define INTEL_FLASH_STATUS_WSMS 0x80
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int flash_decode_status_bits(char status)
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{
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int err = 0;
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if(!(status & INTEL_FLASH_STATUS_WSMS)) {
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printf("Busy\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_ESS) {
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printf("Erase suspended\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_ES) {
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printf("Error in block erase\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_PS) {
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printf("Error in programming\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_VPPS) {
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printf("Vpp low, operation aborted\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_PSS) {
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printf("Program is suspended\n");
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err = -1;
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}
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if(status & INTEL_FLASH_STATUS_BLS) {
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printf("Attempting to program/erase a locked sector\n");
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err = -1;
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}
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if((status & INTEL_FLASH_STATUS_PS) &&
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(status & INTEL_FLASH_STATUS_ES) &&
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(status & INTEL_FLASH_STATUS_ESS)) {
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printf("A command sequence error\n");
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return -1;
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}
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return err;
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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_short *addr;
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int flag, prot, sect;
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ulong start, now;
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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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if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
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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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/* Start erase on unprotected sectors */
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for (sect = s_first; sect<=s_last; sect++) {
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char tmp;
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if (info->protect[sect] == 0) { /* not protected */
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addr = (vu_short *)(info->start[sect]);
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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/* Single Block Erase Command */
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*addr = 0x0020;
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/* Confirm */
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*addr = 0x00D0;
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/* Resume Command, as per errata update */
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*addr = 0x00D0;
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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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*addr = 0x70; /*Read status register command*/
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tmp = (short)*addr & 0x00FF; /* Read the status */
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while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
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if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
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*addr = 0x0050; /* Reset the status register */
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*addr = 0xffff;
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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 - start) > 1000) { /* every second */
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putc ('.');
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}
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udelay(100000); /* 100 ms */
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*addr = 0x0070; /*Read status register command*/
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tmp = (short)*addr & 0x00FF; /* Read status */
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start = get_timer(0);
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}
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if( tmp & INTEL_FLASH_STATUS_ES )
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flash_decode_status_bits(tmp);
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*addr = 0x0050; /* Reset the status register */
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*addr = 0xffff; /* Reset to read mode */
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}
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}
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printf (" done\n");
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return rcode;
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}
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void flash_unprotect (flash_info_t *info)
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{
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/*We can only unprotect the whole flash at once*/
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/*Therefore we must prevent the _flash_real_protect()*/
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/*from re-protecting sectors, that ware protected before */
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/*we called flash_real_protect();*/
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int i;
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for(i = 0; i < info->sector_count; i++)
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info->protect[i] = 0;
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#ifdef CONFIG_SYS_FLASH_PROTECTION
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_flash_real_protect(info, 0, 0);
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#endif
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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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int write_word (flash_info_t *info, ulong dest, ulong da)
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{
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vu_short *addr = (vu_short *)dest;
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ulong start;
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char csr;
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int flag;
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int i;
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union {
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u32 data32;
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u16 data16[2];
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} data;
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data.data32 = da;
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/* Check if Flash is (sufficiently) erased */
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if (((*addr & data.data16[0]) != data.data16[0]) ||
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((*(addr+1) & data.data16[1]) != data.data16[1])) {
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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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for(i = 0; i < 2; i++)
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{
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/* Write Command */
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*addr = 0x0010;
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/* Write Data */
|
|
*addr = data.data16[i];
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
flag = 0;
|
|
*addr = 0x0070; /*Read statusregister command */
|
|
while (((csr = *addr) & INTEL_FLASH_STATUS_WSMS)!=INTEL_FLASH_STATUS_WSMS) {
|
|
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
flag = 1;
|
|
break;
|
|
}
|
|
*addr = 0x0070; /*Read statusregister command */
|
|
}
|
|
if (csr & INTEL_FLASH_STATUS_PSS) {
|
|
printf ("CSR indicates write error (%0x) at %08lx\n",
|
|
csr, (ulong)addr);
|
|
flag = 1;
|
|
}
|
|
|
|
/* Clear Status Registers Command */
|
|
*addr = 0x0050;
|
|
/* Reset to read array mode */
|
|
*addr = 0xffff;
|
|
addr++;
|
|
}
|
|
|
|
return (flag);
|
|
}
|
|
|
|
int flash_real_protect(flash_info_t *info, long offset, int prot)
|
|
{
|
|
int i, idx;
|
|
|
|
for(idx = 0; idx < info->sector_count; idx++)
|
|
if(info->start[idx] == offset)
|
|
break;
|
|
|
|
if(idx==info->sector_count)
|
|
return -1;
|
|
|
|
if(prot == 0) {
|
|
/* Unprotect one sector, which means unprotect all flash
|
|
* and reprotect the other protected sectors.
|
|
*/
|
|
_flash_real_protect(info, 0, 0); /* Unprotects the whole flash*/
|
|
info->protect[idx] = 0;
|
|
|
|
for(i = 0; i < info->sector_count; i++)
|
|
if(info->protect[i])
|
|
_flash_real_protect(info, i, 1);
|
|
}
|
|
else {
|
|
/* We can protect individual sectors */
|
|
_flash_real_protect(info, idx, 1);
|
|
}
|
|
|
|
for( i = 0; i < info->sector_count; i++)
|
|
info->protect[i] = flash_get_protect_status(info, i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int _flash_real_protect(flash_info_t *info, long idx, int prot)
|
|
{
|
|
vu_short *addr;
|
|
int flag;
|
|
ushort cmd;
|
|
ushort tmp;
|
|
ulong now, start;
|
|
|
|
if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
|
|
printf ("Can't change protection for unknown flash type %08lx - aborted\n",
|
|
info->flash_id);
|
|
return -1;
|
|
}
|
|
|
|
if(prot == 0) {
|
|
/*Unlock the sector*/
|
|
cmd = 0x00D0;
|
|
}
|
|
else {
|
|
/*Lock the sector*/
|
|
cmd = 0x0001;
|
|
}
|
|
|
|
addr = (vu_short *)(info->start[idx]);
|
|
|
|
/* If chip is busy, wait for it */
|
|
start = get_timer(0);
|
|
*addr = 0x0070; /*Read status register command*/
|
|
tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
|
|
while(!(tmp & INTEL_FLASH_STATUS_WSMS)) {
|
|
/*Write State Machine Busy*/
|
|
/*Wait untill done or timeout.*/
|
|
if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
*addr = 0x0050; /* Reset the status register */
|
|
*addr = 0xffff; /* Reset the chip */
|
|
printf ("TTimeout\n");
|
|
return 1;
|
|
}
|
|
*addr = 0x0070;
|
|
tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
|
|
start = get_timer(0);
|
|
}
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
/* Unlock block*/
|
|
*addr = 0x0060;
|
|
|
|
*addr = cmd;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
start = get_timer(0);
|
|
*addr = 0x0070; /*Read status register command*/
|
|
tmp = ((ushort)(*addr)) & 0x00FF; /* Read the status */
|
|
while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
|
|
/* Write State Machine Busy */
|
|
if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
*addr = 0x0050; /* Reset the status register */
|
|
*addr = 0xffff;
|
|
printf ("Timeout\n");
|
|
return 1;
|
|
}
|
|
/* show that we're waiting */
|
|
if ((now - start) > 1000) { /* every second */
|
|
putc ('.');
|
|
}
|
|
udelay(100000); /* 100 ms */
|
|
*addr = 0x70; /*Read status register command*/
|
|
tmp = (short)*addr & 0x00FF; /* Read status */
|
|
start = get_timer(0);
|
|
}
|
|
if( tmp & INTEL_FLASH_STATUS_PS )
|
|
flash_decode_status_bits(tmp);
|
|
|
|
*addr =0x0050; /*Clear status register*/
|
|
|
|
/* reset to read mode */
|
|
*addr = 0xffff;
|
|
|
|
return 0;
|
|
}
|