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uboot-1.1.4-kirkwood/board/fads/flash.c

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u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (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 */
#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
#define QUAD_ID(id) ((((ulong)(id) & 0xFF) << 24) | \
(((ulong)(id) & 0xFF) << 16) | \
(((ulong)(id) & 0xFF) << 8) | \
(((ulong)(id) & 0xFF) << 0) \
)
/*-----------------------------------------------------------------------
* 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);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
vu_long *bcsr = (vu_long *)BCSR_ADDR;
unsigned long pd_size, total_size, bsize, or_am;
int i;
/* Init: no FLASHes known */
for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
flash_info[i].size = 0;
flash_info[i].sector_count = 0;
flash_info[i].start[0] = 0xFFFFFFFF; /* For TFTP */
}
switch ((bcsr[2] & BCSR2_FLASH_PD_MASK) >> BCSR2_FLASH_PD_SHIFT) {
case 2:
case 4:
case 6:
pd_size = 0x800000;
or_am = 0xFF800000;
break;
case 5:
case 7:
pd_size = 0x400000;
or_am = 0xFFC00000;
break;
case 8:
pd_size = 0x200000;
or_am = 0xFFE00000;
break;
default:
pd_size = 0;
or_am = 0xFFE00000;
printf("## Unsupported flash detected by BCSR: 0x%08X\n", bcsr[2]);
}
total_size = 0;
for (i = 0; i < CFG_MAX_FLASH_BANKS && total_size < pd_size; ++i) {
bsize = flash_get_size((vu_long *)(CFG_FLASH_BASE + total_size),
&flash_info[i]);
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
i, bsize, bsize >> 20);
}
total_size += bsize;
}
if (total_size != pd_size) {
printf("## Detected flash size %lu conflicts with PD data %lu\n",
total_size, pd_size);
}
/* Remap FLASH according to real size */
memctl->memc_or0 = or_am | CFG_OR_TIMING_FLASH;
for (i = 0; i < CFG_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) {
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
if (CFG_MONITOR_BASE >= flash_info[i].start[0])
flash_protect (FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1,
&flash_info[i]);
#endif
#ifdef CFG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
if (CFG_ENV_ADDR >= flash_info[i].start[0])
flash_protect (FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[i]);
#endif
}
return total_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_AMD:
printf ("AMD ");
break;
case FLASH_MAN_FUJ:
printf ("FUJITSU ");
break;
case FLASH_MAN_BM:
printf ("BRIGHT MICRO ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM040:
printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
break;
case FLASH_AM080:
printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n");
break;
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;
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");
}
/*-----------------------------------------------------------------------
* The following code can not run from flash!
*/
static ulong flash_get_size (vu_long * addr, flash_info_t * info)
{
short i;
/* Write auto select command: read Manufacturer ID */
addr[0x0555] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 0x90909090;
switch (addr[0]) {
case QUAD_ID(AMD_MANUFACT):
info->flash_id = FLASH_MAN_AMD;
break;
case QUAD_ID(FUJ_MANUFACT):
info->flash_id = FLASH_MAN_FUJ;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}
switch (addr[1]) { /* device ID */
case QUAD_ID(AMD_ID_F040B):
case QUAD_ID(AMD_ID_LV040B):
info->flash_id += FLASH_AM040;
info->sector_count = 8;
info->size = 0x00200000;
break; /* => 2 MB */
case QUAD_ID(AMD_ID_F080B):
info->flash_id += FLASH_AM080;
info->sector_count = 16;
info->size = 0x00400000;
break; /* => 4 MB */
#if 0
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;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
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;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
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 /* 0 */
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
#if 0
/* set up sector start address table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
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;
}
} 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;
}
}
#else
/* set sector offsets for uniform sector type */
for (i = 0; i < info->sector_count; i++)
info->start[i] = (ulong)addr + (i * 0x00040000);
#endif
/* 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 */
addr = (volatile unsigned long *) (info->start[i]);
info->protect[i] = addr[2] & 1;
}
if (info->flash_id != FLASH_UNKNOWN) {
addr = (volatile unsigned long *) info->start[0];
*addr = 0xF0F0F0F0; /* reset bank */
}
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, 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 ERR_INVAL;
}
if ((info->flash_id == FLASH_UNKNOWN) ||
(info->flash_id > FLASH_AMD_COMP)) {
printf ("Can't erase unknown flash type - aborted\n");
return ERR_UNKNOWN_FLASH_TYPE;
}
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] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 0x80808080;
addr[0x0555] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_long *) (info->start[sect]);
addr[0] = 0x30303030;
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_long *) (info->start[l_sect]);
while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
{
if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return ERR_TIMOUT;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (volatile unsigned long *) info->start[0];
addr[0] = 0xF0F0F0F0; /* reset bank */
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* 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 */
/*
* 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]);
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *) dest) & data) != data) {
return ERR_NOT_ERASED;
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
addr[0x0555] = 0xAAAAAAAA;
addr[0x02AA] = 0x55555555;
addr[0x0555] = 0xA0A0A0A0;
*((vu_long *) dest) = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *) dest) & 0x80808080) != (data & 0x80808080))
{
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
return ERR_TIMOUT;
}
}
return (0);
}
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