/*
* (C) Copyright 2003-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2004
* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
*
* Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
* garyj@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>
#ifndef CFG_ENV_ADDR
#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
#endif
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
#define FLASH_CYCLE1 0x0555
#define FLASH_CYCLE2 0x02AA
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size(vu_short *addr, flash_info_t *info);
static void flash_reset(flash_info_t *info);
static int write_word_amd(flash_info_t *info, vu_short *dest, ushort data);
static flash_info_t *flash_get_info(ulong base);
/*-----------------------------------------------------------------------
* flash_init()
*
* sets up flash_info and returns size of FLASH (bytes)
*/
unsigned long flash_init (void)
{
unsigned long size = 0;
ulong flashbase = CFG_FLASH_BASE;
/* Init: no FLASHes known */
memset(&flash_info[0], 0, sizeof(flash_info_t));
flash_info[0].size = flash_get_size((vu_short *)flashbase, &flash_info[0]);
size = flash_info[0].size;
#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_get_info(CFG_MONITOR_BASE));
#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_SIZE-1,
flash_get_info(CFG_ENV_ADDR));
#endif
return size ? size : 1;
}
/*-----------------------------------------------------------------------
*/
static void flash_reset(flash_info_t *info)
{
vu_short *base = (vu_short *)(info->start[0]);
/* Put FLASH back in read mode */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
*base = 0x00FF; /* Intel Read Mode */
else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
*base = 0x00F0; /* AMD Read Mode */
}
/*-----------------------------------------------------------------------
*/
static flash_info_t *flash_get_info(ulong base)
{
int i;
flash_info_t * info;
info = NULL;
for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
info = & flash_info;
if (info->size && info->start[0] <= base &&
base <= info->start[0] + info->size - 1)
break;
}
return i == CFG_MAX_FLASH_BANKS ? 0 : info;
}
/*-----------------------------------------------------------------------
*/
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_BM: printf ("BRIGHT MICRO "); 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;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_S29GL064M:
printf ("S29GL064M-R6 (64Mbit, uniform sector size)\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,
info->protect ? " (RO)" : " ");
}
printf ("\n");
return;
}
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
ulong flash_get_size (vu_short *addr, flash_info_t *info)
{
int i;
ushort value;
ulong base = (ulong)addr;
/* Write auto select command sequence */
addr[FLASH_CYCLE1] = 0x00AA; /* for AMD, Intel ignores this */
addr[FLASH_CYCLE2] = 0x0055; /* for AMD, Intel ignores this */
addr[FLASH_CYCLE1] = 0x0090; /* selects Intel or AMD */
/* read Manufacturer ID */
udelay(100);
value = addr[0];
debug ("Manufacturer ID: %04X\n", value);
switch (value) {
case (AMD_MANUFACT & 0xFFFF):
debug ("Manufacturer: AMD (Spansion)\n");
info->flash_id = FLASH_MAN_AMD;
break;
case (INTEL_MANUFACT & 0xFFFF):
debug ("Manufacturer: Intel (not supported yet)\n");
info->flash_id = FLASH_MAN_INTEL;
break;
default:
printf ("Unknown Manufacturer ID: %04X\n", value);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
goto out;
}
value = addr[1];
debug ("Device ID: %04X\n", value);
switch (addr[1]) {
case (AMD_ID_MIRROR & 0xFFFF):
debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
addr[14], addr[15]);
switch(addr[14]) {
case (AMD_ID_GL064M_2 & 0xFFFF):
if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
printf ("Chip: S29GLxxxM -> unknown\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
} else {
debug ("Chip: S29GL064M-R6\n");
info->flash_id += FLASH_S29GL064M;
info->sector_count = 128;
info->size = 0x00800000;
for (i = 0; i < info->sector_count; i++) {
info->start = base;
base += 0x10000;
}
}
break; /* => 16 MB */
default:
printf ("Chip: *** unknown ***\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}
break;
default:
printf ("Unknown Device ID: %04X\n", value);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}
out:
/* Put FLASH back in read mode */
flash_reset(info);
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, ssect, l_sect;
ulong now, last;
debug ("flash_erase: first: %d last: %d\n", s_first, s_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");
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/*
* Start erase on unprotected sectors.
* Since the flash can erase multiple sectors with one command
* we take advantage of that by doing the erase in chunks of
* 3 sectors.
*/
for (sect = s_first; sect <= s_last; ) {
l_sect = -1;
addr[FLASH_CYCLE1] = 0x00AA;
addr[FLASH_CYCLE2] = 0x0055;
addr[FLASH_CYCLE1] = 0x0080;
addr[FLASH_CYCLE1] = 0x00AA;
addr[FLASH_CYCLE2] = 0x0055;
/* do the erase in chunks of at most 3 sectors */
for (ssect = 0; ssect < 3; ssect++) {
if ((sect + ssect) > s_last)
break;
if (info->protect[sect + ssect] == 0) { /* not protected */
addr = (vu_short *)(info->start[sect + ssect]);
addr[0] = 0x0030;
l_sect = sect + ssect;
}
}
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/*
* We wait for the last triggered sector
*/
if (l_sect < 0)
goto DONE;
reset_timer_masked ();
last = 0;
addr = (vu_short *)(info->start[l_sect]);
while ((addr[0] & 0x0080) != 0x0080) {
if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
addr = (vu_short *)info->start[0];
addr[0] = 0x00F0; /* reset bank */
sect += ssect;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
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
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong wp, data;
int rc;
if (addr & 1) {
printf ("unaligned destination not supported\n");
return ERR_ALIGN;
};
if ((int) src & 1) {
printf ("unaligned source not supported\n");
return ERR_ALIGN;
};
wp = addr;
while (cnt >= 2) {
data = *((vu_short *)src);
if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
return (rc);
}
src += 2;
wp += 2;
cnt -= 2;
}
if (cnt == 0) {
return (ERR_OK);
}
if (cnt == 1) {
data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) << 8);
if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
return (rc);
}
src += 1;
wp += 1;
cnt -= 1;
}
return ERR_OK;
}
/*-----------------------------------------------------------------------
* Write a word to Flash for AMD FLASH
* A word is 16 or 32 bits, whichever the bus width of the flash bank
* (not an individual chip) is.
*
* returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word_amd (flash_info_t *info, vu_short *dest, ushort data)
{
int flag;
vu_short *base; /* first address in flash bank */
/* Check if Flash is (sufficiently) erased */
if ((*dest & data) != data) {
return (2);
}
base = (vu_short *)(info->start[0]);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
base[FLASH_CYCLE1] = 0x00AA; /* unlock */
base[FLASH_CYCLE2] = 0x0055; /* unlock */
base[FLASH_CYCLE1] = 0x00A0; /* selects program mode */
*dest = data; /* start programming the data */
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
reset_timer_masked ();
/* data polling for D7 */
while ((*dest & 0x0080) != (data & 0x0080)) {
if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
*dest = 0x00F0; /* reset bank */
return (1);
}
}
return (0);
} |
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