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u-boot/board/etx094/flash.c
wdenk affae2bff8 Initial revision
2002-08-17 09:36:01 +00:00

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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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>
#include <mpc8xx.h>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
unsigned long size_b0, size_b1;
int i;
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Static FLASH Bank configuration here - FIXME XXX */
size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size_b0, size_b0<<20);
}
size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
if (size_b1 > size_b0) {
printf ("## ERROR: "
"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
size_b1, size_b1<<20,
size_b0, size_b0<<20
);
flash_info[0].flash_id = FLASH_UNKNOWN;
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[0].sector_count = -1;
flash_info[1].sector_count = -1;
flash_info[0].size = 0;
flash_info[1].size = 0;
return (0);
}
/* Remap FLASH according to real size */
memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
#ifdef CONFIG_FLASH_16BIT
memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16; /* 16 Bit data port */
#else
memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
#endif
/* Re-do sizing to get full correct info */
size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
&flash_info[0]);
#endif
if (size_b1) {
memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
#ifdef CONFIG_FLASH_16BIT
memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
BR_MS_GPCM | BR_V | BR_PS_16;
#else
memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
BR_MS_GPCM | BR_V;
#endif
/* Re-do sizing to get full correct info */
size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
&flash_info[1]);
flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
&flash_info[1]);
#endif
} else {
memctl->memc_br1 = 0; /* invalidate bank */
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[1].sector_count = -1;
}
flash_info[0].size = size_b0;
flash_info[1].size = size_b1;
return (size_b0 + size_b1);
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
return;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00002000);
}
return;
}
/* set up sector start address table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
#ifdef CONFIG_FLASH_16BIT
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00004000;
info->start[2] = base + 0x00006000;
info->start[3] = base + 0x00008000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00010000) - 0x00030000;
#else
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
#endif
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
}
}
/*-----------------------------------------------------------------------
*/
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_AMD: printf ("AMD "); break;
case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
case FLASH_MAN_SST: printf ("SST "); break;
case FLASH_MAN_STM: printf ("STM "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
break;
case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
break;
case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
break;
case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
break;
case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
break;
case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
break;
case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
break;
case FLASH_SST200A: printf ("39xF200A (2M = 128K x 16)\n");
break;
case FLASH_SST400A: printf ("39xF400A (4M = 256K x 16)\n");
break;
case FLASH_SST800A: printf ("39xF800A (8M = 512K x 16)\n");
break;
case FLASH_STM800AB: printf ("M29W800AB (8M = 512K x 16)\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");
return;
}
/*-----------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
ulong value;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
#ifdef CONFIG_FLASH_16BIT
vu_short *s_addr = (vu_short*)addr;
s_addr[0x5555] = 0x00AA;
s_addr[0x2AAA] = 0x0055;
s_addr[0x5555] = 0x0090;
value = s_addr[0];
value = value|(value<<16);
#else
addr[0x5555] = 0x00AA00AA;
addr[0x2AAA] = 0x00550055;
addr[0x5555] = 0x00900090;
value = addr[0];
#endif
switch (value) {
case AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
info->flash_id = FLASH_MAN_FUJ;
break;
case SST_MANUFACT:
info->flash_id = FLASH_MAN_SST;
break;
case STM_MANUFACT:
info->flash_id = FLASH_MAN_STM;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
#ifdef CONFIG_FLASH_16BIT
value = s_addr[1];
value = value|(value<<16);
#else
value = addr[1]; /* device ID */
#endif
switch (value) {
case AMD_ID_LV400T:
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV400B:
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV800T:
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case AMD_ID_LV800B:
info->flash_id += FLASH_AM800B;
#ifdef CONFIG_FLASH_16BIT
info->sector_count = 19;
info->size = 0x00100000; /* => 1 MB */
#else
info->sector_count = 19;
info->size = 0x00200000; /* => 2 MB */
#endif
break;
case AMD_ID_LV160T:
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case AMD_ID_LV160B:
info->flash_id += FLASH_AM160B;
#ifdef CONFIG_FLASH_16BIT
info->sector_count = 35;
info->size = 0x00200000; /* => 2 MB */
#else
info->sector_count = 35;
info->size = 0x00400000; /* => 4 MB */
#endif
break;
#if 0 /* enable when device IDs are available */
case AMD_ID_LV320T:
info->flash_id += FLASH_AM320T;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
case AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
#endif
case SST_ID_xF200A:
info->flash_id += FLASH_SST200A;
info->sector_count = 64; /* 39xF200A ID ( 2M = 128K x 16 ) */
info->size = 0x00080000;
break;
case SST_ID_xF400A:
info->flash_id += FLASH_SST400A;
info->sector_count = 128; /* 39xF400A ID ( 4M = 256K x 16 ) */
info->size = 0x00100000;
break;
case SST_ID_xF800A:
info->flash_id += FLASH_SST800A;
info->sector_count = 256; /* 39xF800A ID ( 8M = 512K x 16 ) */
info->size = 0x00200000;
break; /* => 2 MB */
case STM_ID_x800AB:
info->flash_id += FLASH_STM800AB;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
if (info->sector_count > CFG_MAX_FLASH_SECT) {
printf ("** ERROR: sector count %d > max (%d) **\n",
info->sector_count, CFG_MAX_FLASH_SECT);
info->sector_count = CFG_MAX_FLASH_SECT;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00002000);
}
} else { /* AMD and Fujitsu types */
/* set up sector start address table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
#ifdef CONFIG_FLASH_16BIT
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00004000;
info->start[2] = base + 0x00006000;
info->start[3] = base + 0x00008000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00010000) - 0x00030000;
#else
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
#endif
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address:
* (A7 .. A0) = 0x02
* D0 = 1 if protected
*/
#ifdef CONFIG_FLASH_16BIT
s_addr = (volatile unsigned short *)(info->start[i]);
info->protect[i] = s_addr[2] & 1;
#else
addr = (volatile unsigned long *)(info->start[i]);
info->protect[i] = addr[2] & 1;
#endif
}
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
#ifdef CONFIG_FLASH_16BIT
s_addr = (volatile unsigned short *)(info->start[0]);
*s_addr = 0x00F0; /* reset bank */
#else
addr = (volatile unsigned long *)info->start[0];
*addr = 0x00F000F0; /* reset bank */
#endif
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_long *addr = (vu_long*)(info->start[0]);
int flag, prot, sect;
ulong start, now, last;
#ifdef CONFIG_FLASH_16BIT
vu_short *s_addr = (vu_short*)addr;
#endif
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;
}
/*#ifndef CONFIG_FLASH_16BIT
ulong type;
type = (info->flash_id & FLASH_VENDMASK);
if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return;
}
#endif*/
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 = get_timer (0);
last = start;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
#ifdef CONFIG_FLASH_16BIT
vu_short *s_sect_addr = (vu_short*)(info->start[sect]);
#else
vu_long *sect_addr = (vu_long*)(info->start[sect]);
#endif
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
#ifdef CONFIG_FLASH_16BIT
/*printf("\ns_sect_addr=%x",s_sect_addr);*/
s_addr[0x5555] = 0x00AA;
s_addr[0x2AAA] = 0x0055;
s_addr[0x5555] = 0x0080;
s_addr[0x5555] = 0x00AA;
s_addr[0x2AAA] = 0x0055;
s_sect_addr[0] = 0x0030;
#else
addr[0x5555] = 0x00AA00AA;
addr[0x2AAA] = 0x00550055;
addr[0x5555] = 0x00800080;
addr[0x5555] = 0x00AA00AA;
addr[0x2AAA] = 0x00550055;
sect_addr[0] = 0x00300030;
#endif
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
#ifdef CONFIG_FLASH_16BIT
while ((s_sect_addr[0] & 0x0080) != 0x0080) {
#else
while ((sect_addr[0] & 0x00800080) != 0x00800080) {
#endif
if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
}
}
/* reset to read mode */
addr = (volatile unsigned long *)info->start[0];
#ifdef CONFIG_FLASH_16BIT
s_addr[0] = 0x00F0; /* reset bank */
#else
addr[0] = 0x00F000F0; /* reset bank */
#endif
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
wp = (addr & ~3); /* get lower word aligned address */
/*
* 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);
}
return (write_word(info, wp, data));
}
/*-----------------------------------------------------------------------
* 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)
{
vu_long *addr = (vu_long*)(info->start[0]);
#ifdef CONFIG_FLASH_16BIT
vu_short high_data;
vu_short low_data;
vu_short *s_addr = (vu_short*)addr;
#endif
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *)dest) & data) != data) {
return (2);
}
#ifdef CONFIG_FLASH_16BIT
/* Write the 16 higher-bits */
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
high_data = ((data>>16) & 0x0000ffff);
s_addr[0x5555] = 0x00AA;
s_addr[0x2AAA] = 0x0055;
s_addr[0x5555] = 0x00A0;
*((vu_short *)dest) = high_data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
/* Write the 16 lower-bits */
#endif
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
#ifdef CONFIG_FLASH_16BIT
dest += 0x2;
low_data = (data & 0x0000ffff);
s_addr[0x5555] = 0x00AA;
s_addr[0x2AAA] = 0x0055;
s_addr[0x5555] = 0x00A0;
*((vu_short *)dest) = low_data;
#else
addr[0x5555] = 0x00AA00AA;
addr[0x2AAA] = 0x00550055;
addr[0x5555] = 0x00A000A0;
*((vu_long *)dest) = data;
#endif
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
#ifdef CONFIG_FLASH_16BIT
while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {
#else
while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
#endif
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
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