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

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/*
* (C) Copyright 2001
* 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>
#if defined(CFG_ENV_IS_IN_FLASH)
# ifndef CFG_ENV_ADDR
# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef CFG_ENV_SIZE
# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
# endif
# ifndef CFG_ENV_SECT_SIZE
# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
# endif
#endif
/*---------------------------------------------------------------------*/
#undef DEBUG_FLASH
#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/
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_data (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*-----------------------------------------------------------------------
*
* The PCU E uses an address map where flash banks are aligned top
* down, so that the "first" flash bank ends at top of memory, and
* the monitor entry point is at address (0xFFF00100). The second
* flash bank is mapped immediately below bank 0.
*
* This is NOT in conformance to the "official" memory map!
*
*/
#define PCU_MONITOR_BASE ( (flash_info[0].start[0] + flash_info[0].size - 1) \
- (0xFFFFFFFF - CFG_MONITOR_BASE) )
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
unsigned long base, 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 */
/*
* Warning:
*
* Since the PCU E memory map assigns flash banks top down,
* we swap the numbering later if both banks are equipped,
* so they look like a contiguous area of memory.
*/
DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
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);
}
DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM);
size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]);
DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1);
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);
}
DEBUGF ("## Before remap: "
"BR0: 0x%08x OR0: 0x%08x "
"BR6: 0x%08x OR6: 0x%08x\n",
memctl->memc_br0, memctl->memc_or0,
memctl->memc_br6, memctl->memc_or6);
/* Remap FLASH according to real size */
base = 0 - size_b0;
memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
memctl->memc_br0 = (base & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
DEBUGF("## BR0: 0x%08x OR0: 0x%08x\n",
memctl->memc_br0, memctl->memc_or0);
/* Re-do sizing to get full correct info */
size_b0 = flash_get_size((vu_long *)base, &flash_info[0]);
base = 0 - size_b0;
flash_info[0].size = size_b0;
flash_get_offsets (base, &flash_info[0]);
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
PCU_MONITOR_BASE,
PCU_MONITOR_BASE+CFG_MONITOR_LEN-1,
&flash_info[0]);
#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
if (size_b1) {
flash_info_t tmp_info;
memctl->memc_or6 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) |
BR_PS_16 | BR_MS_GPCM | BR_V;
DEBUGF("## New BR6: 0x%08x OR6: 0x%08x\n",
memctl->memc_br6, memctl->memc_or6);
/* Re-do sizing to get full correct info */
size_b1 = flash_get_size((vu_long *)(base - size_b1),
&flash_info[1]);
base -= size_b1;
flash_get_offsets (base, &flash_info[1]);
flash_info[1].size = size_b1;
#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[1]);
#endif
/*
* Swap bank numbers so that addresses are in ascending order
*/
tmp_info = flash_info[0];
flash_info[0] = flash_info[1];
flash_info[1] = tmp_info;
} else {
memctl->memc_br1 = 0; /* invalidate bank */
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[1].sector_count = -1;
}
DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
return (size_b0 + size_b1);
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
short n;
if (info->flash_id == FLASH_UNKNOWN) {
return;
}
if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) {
return;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AMDL322T:
case FLASH_AMDL323T:
case FLASH_AMDL324T:
/* set sector offsets for top boot block type */
base += info->size;
i = info->sector_count;
for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
base -= 8 << 10;
--i;
info->start[i] = base;
}
while (i > 0) { /* 64k regular sectors */
base -= 64 << 10;
--i;
info->start[i] = base;
}
return;
case FLASH_AMDL322B:
case FLASH_AMDL323B:
case FLASH_AMDL324B:
/* set sector offsets for bottom boot block type */
for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
info->start[i] = base;
base += 8 << 10;
}
while (base < info->size) { /* 64k regular sectors */
info->start[i] = base;
base += 64 << 10;
++i;
}
return;
case FLASH_AMDL640:
/* set sector offsets for dual boot block type */
for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
info->start[i] = base;
base += 8 << 10;
}
n = info->sector_count - 8;
while (i < n) { /* 64k regular sectors */
info->start[i] = base;
base += 64 << 10;
++i;
}
while (i < info->sector_count) { /* 8 x 8k boot sectors */
info->start[i] = base;
base += 8 << 10;
++i;
}
return;
default:
return;
}
/* NOTREACHED */
}
/*-----------------------------------------------------------------------
*/
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;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AMDL322B: printf ("AM29DL322B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AMDL322T: printf ("AM29DL322T (32 Mbit, top boot sector)\n");
break;
case FLASH_AMDL323B: printf ("AM29DL323B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AMDL323T: printf ("AM29DL323T (32 Mbit, top boot sector)\n");
break;
case FLASH_AMDL324B: printf ("AM29DL324B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AMDL324T: printf ("AM29DL324T (32 Mbit, top boot sector)\n");
break;
case FLASH_AMDL640: printf ("AM29DL640D (64 Mbit, dual boot sector)\n");
break;
default: printf ("Unknown Chip Type 0x%lX\n",
info->flash_id);
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;
ushort value;
vu_short *saddr = (vu_short *)addr;
/* Write auto select command: read Manufacturer ID */
saddr[0x0555] = 0x00AA;
saddr[0x02AA] = 0x0055;
saddr[0x0555] = 0x0090;
value = saddr[0];
DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value);
switch (value) {
case (AMD_MANUFACT & 0xFFFF):
info->flash_id = FLASH_MAN_AMD;
break;
case (FUJ_MANUFACT & 0xFFFF):
info->flash_id = FLASH_MAN_FUJ;
break;
default:
DEBUGF("Unknown Manufacturer ID\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = saddr[1]; /* device ID */
DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value);
switch (value) {
case (AMD_ID_DL322T & 0xFFFF):
info->flash_id += FLASH_AMDL322T;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL322B & 0xFFFF):
info->flash_id += FLASH_AMDL322B;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL323T & 0xFFFF):
info->flash_id += FLASH_AMDL323T;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL323B & 0xFFFF):
info->flash_id += FLASH_AMDL323B;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL324T & 0xFFFF):
info->flash_id += FLASH_AMDL324T;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL324B & 0xFFFF):
info->flash_id += FLASH_AMDL324B;
info->sector_count = 71;
info->size = 0x00400000;
break; /* => 8 MB */
case (AMD_ID_DL640 & 0xFFFF):
info->flash_id += FLASH_AMDL640;
info->sector_count = 142;
info->size = 0x00800000;
break;
default:
DEBUGF("Unknown Device ID\n");
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
flash_get_offsets ((ulong)addr, info);
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
#if 0
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
/* D0 = 1 if protected */
saddr = (vu_short *)(info->start[i]);
info->protect[i] = saddr[2] & 1;
#else
info->protect[i] =0;
#endif
}
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;
}
saddr = (vu_short *)info->start[0];
*saddr = 0x00F0; /* restore read mode */
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_short *addr = (vu_short*)(info->start[0]);
int flag, prot, sect, l_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_UNKNOWN) ||
(info->flash_id > FLASH_AMD_COMP)) {
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");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0x0555] = 0x00AA;
addr[0x02AA] = 0x0055;
addr[0x0555] = 0x0080;
addr[0x0555] = 0x00AA;
addr[0x02AA] = 0x0055;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_short*)(info->start[sect]);
addr[0] = 0x0030;
l_sect = sect;
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/*
* We wait for the last triggered sector
*/
if (l_sect < 0)
goto DONE;
start = get_timer (0);
last = start;
addr = (vu_short*)(info->start[l_sect]);
while ((addr[0] & 0x0080) != 0x0080) {
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;
}
}
DONE:
/* reset to read mode */
addr = (vu_short *)info->start[0];
addr[0] = 0x00F0; /* reset bank */
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
#define FLASH_WIDTH 2 /* flash bus width in bytes */
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_data(info, wp, data)) != 0) {
return (rc);
}
wp += FLASH_WIDTH;
}
/*
* handle FLASH_WIDTH aligned part
*/
while (cnt >= FLASH_WIDTH) {
data = 0;
for (i=0; i<FLASH_WIDTH; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_data(info, wp, data)) != 0) {
return (rc);
}
wp += FLASH_WIDTH;
cnt -= FLASH_WIDTH;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<FLASH_WIDTH; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return (write_data(info, wp, data));
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t *info, ulong dest, ulong data)
{
vu_short *addr = (vu_short*)(info->start[0]);
vu_short *sdest = (vu_short *)dest;
ushort sdata = (ushort)data;
ushort sval;
ulong start, passed;
int flag, rc;
/* Check if Flash is (sufficiently) erased */
if ((*sdest & sdata) != sdata) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0x0555] = 0x00AA;
addr[0x02AA] = 0x0055;
addr[0x0555] = 0x00A0;
#ifdef WORKAROUND_FOR_BROKEN_HARDWARE
/* work around the timeout bugs */
udelay(20);
#endif
*sdest = sdata;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
rc = 0;
/* data polling for D7 */
start = get_timer (0);
for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) {
sval = *sdest;
if ((sval & 0x0080) == (sdata & 0x0080))
break;
if ((sval & 0x0020) == 0) /* DQ5: Timeout? */
continue;
sval = *sdest;
if ((sval & 0x0080) != (sdata & 0x0080))
rc = 1;
break;
}
if (rc) {
DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n",
dest, sval, sdata);
}
if (passed >= CFG_FLASH_WRITE_TOUT) {
DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n",
dest, sval, sdata);
rc = 1;
}
/* reset to read mode */
addr = (vu_short *)info->start[0];
addr[0] = 0x00F0; /* reset bank */
return (rc);
}
/*-----------------------------------------------------------------------
*/
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