/*
* (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_byte (flash_info_t *info, ulong dest, uchar 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;
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 = 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, size<<20);
}
/* Remap FLASH according to real size */
memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) |
(memctl->memc_br0 & ~(BR_BA_MSK));
/* Re-do sizing to get full correct info */
size = 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
flash_info[0].size = size;
return (size);
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
/* 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 + 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 {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00004000;
info->start[i--] = base + info->size - 0x00006000;
info->start[i--] = base + info->size - 0x00008000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00010000;
}
}
}
/*-----------------------------------------------------------------------
*/
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_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");
return;
}
/*-----------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
uchar value;
vu_char *caddr = (vu_char *)addr;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
caddr[0x0AAA] = 0xAA;
caddr[0x0555] = 0x55;
caddr[0x0AAA] = 0x90;
value = caddr[0];
switch (value) {
case (AMD_MANUFACT & 0xFF):
info->flash_id = FLASH_MAN_AMD;
break;
case (FUJ_MANUFACT & 0xFF):
info->flash_id = FLASH_MAN_FUJ;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = caddr[2]; /* device ID */
switch (value) {
case (AMD_ID_LV400T & 0xFF):
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00080000;
break; /* => 512 kB */
case (AMD_ID_LV400B & 0xFF):
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00080000;
break; /* => 512 kB */
case (AMD_ID_LV800T & 0xFF):
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00100000;
break; /* => 1 MB */
case (AMD_ID_LV800B & 0xFF):
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00100000;
break; /* => 1 MB */
case (AMD_ID_LV160T & 0xFF):
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00200000;
break; /* => 2 MB */
case (AMD_ID_LV160B & 0xFF):
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00200000;
break; /* => 2 MB */
#if 0 /* enable when device IDs are available */
case (AMD_ID_LV320T & 0xFF):
info->flash_id += FLASH_AM320T;
info->sector_count = 67;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_LV320B & 0xFF):
info->flash_id += FLASH_AM320B;
info->sector_count = 67;
info->size = 0x00400000;
break; /* => 4 MB */
#endif
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
/* 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 + 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 {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00004000;
info->start[i--] = base + info->size - 0x00006000;
info->start[i--] = base + info->size - 0x00008000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00010000;
}
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection: D0 = 1 if protected */
caddr = (volatile unsigned char *)(info->start[i]);
info->protect[i] = caddr[4] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
caddr = (vu_char *)info->start[0];
*caddr = 0xF0; /* reset bank */
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_char *addr = (vu_char*)(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[0x0AAA] = 0xAA;
addr[0x0555] = 0x55;
addr[0x0AAA] = 0x80;
addr[0x0AAA] = 0xAA;
addr[0x0555] = 0x55;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_char*)(info->start[sect]);
addr[0] = 0x30;
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_char*)(info->start[l_sect]);
while ((addr[0] & 0x80) != 0x80) {
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_char *)info->start[0];
addr[0] = 0xF0; /* 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)
{
int rc;
while (cnt > 0) {
if ((rc = write_byte(info, addr++, *src++)) != 0) {
return (rc);
}
--cnt;
}
return (0);
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_byte (flash_info_t *info, ulong dest, uchar data)
{
vu_char *addr = (vu_char*)(info->start[0]);
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_char *)dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0x0AAA] = 0xAA;
addr[0x0555] = 0x55;
addr[0x0AAA] = 0xA0;
*((vu_char *)dest) = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
