u-boot/board/mpc8260ads/flash.c
Wolfgang Denk 700a0c648d Add common (with Linux) MTD partition scheme and "mtdparts" command
Old, obsolete and duplicated code was cleaned up and replace by the
new partitioning method. There are two possible approaches now:
* define a single, static partition
* use mtdparts command line option and dynamic partitioning
Default is static partitioning.
2005-08-08 01:03:24 +02:00

492 lines
12 KiB
C

/*
* (C) Copyright 2000, 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
* Add support the Sharp chips on the mpc8260ads.
* I started with board/ip860/flash.c and made changes I found in
* the MTD project by David Schleef.
*
* (C) Copyright 2003 Arabella Software Ltd.
* Yuli Barcohen <yuli@arabellasw.com>
* Re-written to support multi-bank flash SIMMs.
* Added support for real protection and JFFS2.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
/* Intel-compatible flash ID */
#define INTEL_COMPAT 0x89898989
#define INTEL_ALT 0xB0B0B0B0
/* Intel-compatible flash commands */
#define INTEL_PROGRAM 0x10101010
#define INTEL_ERASE 0x20202020
#define INTEL_CLEAR 0x50505050
#define INTEL_LOCKBIT 0x60606060
#define INTEL_PROTECT 0x01010101
#define INTEL_STATUS 0x70707070
#define INTEL_READID 0x90909090
#define INTEL_CONFIRM 0xD0D0D0D0
#define INTEL_RESET 0xFFFFFFFF
/* Intel-compatible flash status bits */
#define INTEL_FINISHED 0x80808080
#define INTEL_OK 0x80808080
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* This board supports 32-bit wide flash SIMMs (4x8-bit configuration.)
* Up to 32MB of flash supported (up to 4 banks.)
* BCSR is used for flash presence detect (page 4-65 of the User's Manual)
*
* The following code can not run from flash!
*/
unsigned long flash_init (void)
{
ulong size = 0, sect_start, sect_size = 0, bank_size;
ushort sect_count = 0;
int i, j, nbanks;
vu_long *addr = (vu_long *)CFG_FLASH_BASE;
vu_long *bcsr = (vu_long *)CFG_BCSR;
switch (bcsr[2] & 0xF) {
case 0:
nbanks = 4;
break;
case 1:
nbanks = 2;
break;
case 2:
nbanks = 1;
break;
default: /* Unsupported configurations */
nbanks = CFG_MAX_FLASH_BANKS;
}
if (nbanks > CFG_MAX_FLASH_BANKS)
nbanks = CFG_MAX_FLASH_BANKS;
for (i = 0; i < nbanks; i++) {
*addr = INTEL_READID; /* Read Intelligent Identifier */
if ((addr[0] == INTEL_COMPAT) || (addr[0] == INTEL_ALT)) {
switch (addr[1]) {
case SHARP_ID_28F016SCL:
case SHARP_ID_28F016SCZ:
flash_info[i].flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
sect_count = 32;
sect_size = 0x40000;
break;
default:
flash_info[i].flash_id = FLASH_UNKNOWN;
sect_count = CFG_MAX_FLASH_SECT;
sect_size =
CFG_FLASH_SIZE / CFG_MAX_FLASH_BANKS / CFG_MAX_FLASH_SECT;
}
}
else
flash_info[i].flash_id = FLASH_UNKNOWN;
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
printf("### Unknown flash ID %08lX %08lX at address %08lX ###\n",
addr[0], addr[1], (ulong)addr);
size = 0;
*addr = INTEL_RESET; /* Reset bank to Read Array mode */
break;
}
flash_info[i].sector_count = sect_count;
flash_info[i].size = bank_size = sect_size * sect_count;
size += bank_size;
sect_start = (ulong)addr;
for (j = 0; j < sect_count; j++) {
addr = (vu_long *)sect_start;
flash_info[i].start[j] = sect_start;
flash_info[i].protect[j] = (addr[2] == 0x01010101);
sect_start += sect_size;
}
*addr = INTEL_RESET; /* Reset bank to Read Array mode */
addr = (vu_long *)sect_start;
}
if (size == 0) { /* Unknown flash, fill with hard-coded values */
sect_start = CFG_FLASH_BASE;
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
flash_info[i].flash_id = FLASH_UNKNOWN;
flash_info[i].size = CFG_FLASH_SIZE / CFG_MAX_FLASH_BANKS;
flash_info[i].sector_count = sect_count;
for (j = 0; j < sect_count; j++) {
flash_info[i].start[j] = sect_start;
flash_info[i].protect[j] = 0;
sect_start += sect_size;
}
}
size = CFG_FLASH_SIZE;
}
else
for (i = nbanks; i < CFG_MAX_FLASH_BANKS; i++) {
flash_info[i].flash_id = FLASH_UNKNOWN;
flash_info[i].size = 0;
flash_info[i].sector_count = 0;
}
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
#ifdef CFG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
&flash_info[0]);
#endif
return (size);
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
printf ("missing or unknown FLASH type\n");
return;
}
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_INTEL: printf ("Intel "); break;
case FLASH_MAN_SHARP: printf ("Sharp "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
break;
case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
break;
case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
break;
case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
break;
default: printf ("Unknown Chip Type\n");
break;
}
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf (" Sector Start Addresses:");
for (i=0; i<info->sector_count; ++i) {
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s",
info->start[i],
info->protect[i] ? " (RO)" : " "
);
}
printf ("\n");
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
ulong start, now, last;
if ((s_first < 0) || (s_first > s_last)) {
if (info->flash_id == FLASH_UNKNOWN) {
printf ("- missing\n");
} else {
printf ("- no sectors to erase\n");
}
return 1;
}
if ( ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
&& ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
}
prot = 0;
for (sect=s_first; sect<=s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n",
prot);
} else {
printf ("\n");
}
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
vu_long *addr = (vu_long *)(info->start[sect]);
last = start = get_timer (0);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Clear Status Register */
*addr = INTEL_CLEAR;
/* Single Block Erase Command */
*addr = INTEL_ERASE;
/* Confirm */
*addr = INTEL_CONFIRM;
if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
/* Resume Command, as per errata update */
*addr = INTEL_CONFIRM;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = INTEL_RESET; /* reset bank */
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
if (*addr != INTEL_OK) {
printf("Block erase failed at %08X, CSR=%08X\n",
(uint)addr, (uint)*addr);
*addr = INTEL_RESET; /* reset bank */
return 1;
}
/* reset to read mode */
*addr = INTEL_RESET;
}
}
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
ulong start;
int rc = 0;
int flag;
vu_long *addr = (vu_long *)dest;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
return (2);
}
*addr = INTEL_CLEAR; /* Clear status register */
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Write Command */
*addr = INTEL_PROGRAM;
/* Write Data */
*addr = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
printf("Write timed out\n");
rc = 1;
break;
}
}
if (*addr != INTEL_OK) {
printf ("Write failed at %08X, CSR=%08X\n", (uint)addr, (uint)*addr);
rc = 1;
}
*addr = INTEL_RESET; /* Reset to read array mode */
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
wp = (addr & ~3); /* get lower word aligned address */
*(vu_long *)wp = INTEL_RESET; /* Reset to read array mode */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
data = 0;
for (i=0, cp=wp; i<l; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
for (; i<4 && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = 0;
for (i=0; i<4; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
rc = write_word(info, wp, data);
return rc;
}
/*-----------------------------------------------------------------------
* Set/Clear sector's lock bit, returns:
* 0 - OK
* 1 - Error (timeout, voltage problems, etc.)
*/
int flash_real_protect(flash_info_t *info, long sector, int prot)
{
ulong start;
int i;
int rc = 0;
vu_long *addr = (vu_long *)(info->start[sector]);
int flag = disable_interrupts();
*addr = INTEL_CLEAR; /* Clear status register */
if (prot) { /* Set sector lock bit */
*addr = INTEL_LOCKBIT; /* Sector lock bit */
*addr = INTEL_PROTECT; /* set */
}
else { /* Clear sector lock bit */
*addr = INTEL_LOCKBIT; /* All sectors lock bits */
*addr = INTEL_CONFIRM; /* clear */
}
start = get_timer(0);
while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT) {
printf("Flash lock bit operation timed out\n");
rc = 1;
break;
}
}
if (*addr != INTEL_OK) {
printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
(uint)addr, (uint)*addr);
rc = 1;
}
if (!rc)
info->protect[sector] = prot;
/*
* Clear lock bit command clears all sectors lock bits, so
* we have to restore lock bits of protected sectors.
*/
if (!prot)
for (i = 0; i < info->sector_count; i++)
if (info->protect[i]) {
addr = (vu_long *)(info->start[i]);
*addr = INTEL_LOCKBIT; /* Sector lock bit */
*addr = INTEL_PROTECT; /* set */
udelay(CFG_FLASH_LOCK_TOUT * 1000);
}
if (flag)
enable_interrupts();
*addr = INTEL_RESET; /* Reset to read array mode */
return rc;
}