/*
* (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 <mpc824x.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_char *addr, flash_info_t *info);
static int write_data (flash_info_t *info, uchar *dest, uchar data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*
* don't ask. its stupid, but more than one soul has had to live with this mistake
* "swaptab[i]" is the value of "i" with the bits reversed.
*/
#define MUSENKI_BROKEN_FLASH 1
#ifdef MUSENKI_BROKEN_FLASH
unsigned char swaptab[256] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
#define BS(b) (swaptab[b])
#else
#define BS(b) (b)
#endif
#define BYTEME(x) ((x) & 0xFF)
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
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 */
DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",CFG_FLASH_BASE0_PRELIM);
size_b0 = flash_get_size((vu_char *)CFG_FLASH_BASE0_PRELIM, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0: "
"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
flash_info[0].flash_id,
size_b0, size_b0<<20);
}
DEBUGF("## Get flash bank 2 size @ 0x%08x\n",CFG_FLASH_BASE1_PRELIM);
size_b1 = flash_get_size((vu_char *)CFG_FLASH_BASE1_PRELIM, &flash_info[1]);
DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
flash_info[0].size = size_b0;
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
DEBUGF("protect monitor %x @ %x\n", CFG_MONITOR_BASE, monitor_flash_len);
/* 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 */
DEBUGF("protect environtment %x @ %x\n", CFG_ENV_ADDR, CFG_ENV_SECT_SIZE);
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[1].size = size_b1;
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+monitor_flash_len-1,
&flash_info[1]);
#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[1]);
#endif
} else {
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[1].sector_count = -1;
flash_info[1].size = 0;
}
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;
if (info->flash_id == FLASH_UNKNOWN) {
return;
}
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_INTEL:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
base += 0x00020000; /* 128k per bank */
}
return;
default:
printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
return;
}
}
/*-----------------------------------------------------------------------
*/
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;
case FLASH_MAN_INTEL: printf ("Intel "); break;
case FLASH_MAN_MT: printf ("MT "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n");
break;
case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n");
break;
case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n");
break;
default: printf ("Unknown Chip Type\n");
break;
}
if (info->size >= (1 << 20)) {
i = 20;
} else {
i = 10;
}
printf (" Size: %ld %cB in %d Sectors\n",
info->size >> i,
(i == 20) ? 'M' : 'k',
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_char *addr, flash_info_t *info)
{
vu_char manuf, device;
addr[0] = BS(0x90);
manuf = BS(addr[0]);
DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (vu_char *)addr, manuf);
switch (manuf) {
case BYTEME(AMD_MANUFACT):
info->flash_id = FLASH_MAN_AMD;
break;
case BYTEME(FUJ_MANUFACT):
info->flash_id = FLASH_MAN_FUJ;
break;
case BYTEME(SST_MANUFACT):
info->flash_id = FLASH_MAN_SST;
break;
case BYTEME(STM_MANUFACT):
info->flash_id = FLASH_MAN_STM;
break;
case BYTEME(INTEL_MANUFACT):
info->flash_id = FLASH_MAN_INTEL;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
return 0; /* no or unknown flash */
}
device = BS(addr[2]); /* device ID */
DEBUGF("Device ID @ 0x%08x: 0x%08x\n", (&addr[1]), device);
switch (device) {
case BYTEME(INTEL_ID_28F320J3A):
info->flash_id += FLASH_28F320J3A;
info->sector_count = 32;
info->size = 0x00400000;
break; /* => 4 MB */
case BYTEME(INTEL_ID_28F640J3A):
info->flash_id += FLASH_28F640J3A;
info->sector_count = 64;
info->size = 0x00800000;
break; /* => 8 MB */
case BYTEME(INTEL_ID_28F128J3A):
info->flash_id += FLASH_28F128J3A;
info->sector_count = 128;
info->size = 0x01000000;
break; /* => 16 MB */
default:
info->flash_id = FLASH_UNKNOWN;
addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
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;
}
addr[0] = BS(0xFF); /* restore read mode */
return (info->size);
}
/*-----------------------------------------------------------------------
*/
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) {
printf ("Can erase only Intel flash types - aborted\n");
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 = 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 */
vu_char *addr = (vu_char *)(info->start[sect]);
unsigned long status;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
*addr = BS(0x50); /* clear status register */
*addr = BS(0x20); /* erase setup */
*addr = BS(0xD0); /* erase confirm */
/* re-enable interrupts if necessary */
if (flag) {
enable_interrupts();
}
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = BS(0xB0); /* suspend erase */
*addr = BS(0xFF); /* reset to read mode */
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
*addr = BS(0xFF); /* reset to read mode */
}
}
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
*/
#define FLASH_WIDTH 1 /* flash bus width in bytes */
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
uchar *wp = (uchar *)addr;
int rc;
if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
while (cnt > 0) {
if ((rc = write_data(info, wp, *src)) != 0) {
return rc;
}
wp++;
src++;
cnt--;
}
return cnt;
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t *info, uchar *dest, uchar data)
{
vu_char *addr = (vu_char *)dest;
ulong status;
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((BS(*addr) & data) != data) {
return 2;
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
*addr = BS(0x40); /* write setup */
*addr = data;
/* re-enable interrupts if necessary */
if (flag) {
enable_interrupts();
}
start = get_timer (0);
while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
*addr = BS(0xFF); /* restore read mode */
return 1;
}
}
*addr = BS(0xFF); /* restore read mode */
return 0;
}
/*-----------------------------------------------------------------------
*/
