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u-boot/board/utx8245/flash.c
wdenk fe8c2806cd Initial revision
2002-11-03 00:38:21 +00:00

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/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002
* Gregory E. Allen, gallen@arlut.utexas.edu
* Matthew E. Karger, karger@arlut.utexas.edu
* Applied Research Laboratories, The University of Texas at Austin
*
* 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>
#include <asm/processor.h>
#define ROM_CS0_START 0xFF800000
#define ROM_CS1_START 0xFF000000
#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 FLASH_BANK_SIZE 0x200000
#define MAIN_SECT_SIZE 0x10000
#define SECT_SIZE_32KB 0x8000
#define SECT_SIZE_8KB 0x2000
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
static int write_word (flash_info_t *info, ulong dest, ulong data);
static __inline__ unsigned long get_msr(void)
{ unsigned long msr;
__asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
return msr;
}
static __inline__ void set_msr(unsigned long msr)
{
__asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
}
/*flash command address offsets*/
#define ADDR0 (0x555)
#define ADDR1 (0xAAA)
#define ADDR3 (0x001)
#define FLASH_WORD_SIZE unsigned char
/*---------------------------------------------------------------------*/
/*#define DEBUG_FLASH 1 */
/*---------------------------------------------------------------------*/
unsigned long flash_init(void)
{
int i, j;
ulong size = 0;
unsigned char manuf_id, device_id;
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
{
vu_char *addr = (vu_char *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
addr[0x555] = 0xAA; /* 3 cycles to read device info. See */
addr[0x2AA] = 0x55; /* AM29LV116D datasheet for list of */
addr[0x555] = 0x90; /* available commands. */
manuf_id = addr[0];
device_id = addr[1];
#if defined DEBUG_FLASH
printf("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
#endif
if ( (manuf_id == (uchar)(AMD_MANUFACT)) &&
( device_id == AMD_ID_LV116DT))
{
flash_info[i].flash_id = ((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
(AMD_ID_LV116DT & FLASH_TYPEMASK);
} else {
flash_info[i].flash_id = FLASH_UNKNOWN;
addr[0] = (long)0xFFFFFFFF;
goto Done;
}
#if defined DEBUG_FLASH
printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
#endif
addr[0] = (long)0xFFFFFFFF;
flash_info[i].size = FLASH_BANK_SIZE;
flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
for (j = 0; j < flash_info[i].sector_count; j++)
{
if (j < (CFG_MAX_FLASH_SECT - 3) )
flash_info[i].start[j] = CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
j * MAIN_SECT_SIZE;
else if (j == (CFG_MAX_FLASH_SECT - 3) )
flash_info[i].start[j] = flash_info[i].start[j-1] + SECT_SIZE_32KB;
else
flash_info[i].start[j] = flash_info[i].start[j-1] + SECT_SIZE_8KB;
}
size += flash_info[i].size;
}
/* Protect monitor and environment sectors
*/
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]);
#endif
#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
#endif
Done:
return size;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info(flash_info_t *info)
{
static const char unk[] = "Unknown";
const char *mfct = unk, *type = unk;
unsigned int i;
if(info->flash_id != FLASH_UNKNOWN)
{
switch(info->flash_id & FLASH_VENDMASK)
{
case FLASH_MAN_AMD: mfct = "AMD"; break;
case FLASH_MAN_FUJ: mfct = "FUJITSU"; break;
case FLASH_MAN_STM: mfct = "STM"; break;
case FLASH_MAN_SST: mfct = "SST"; break;
case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break;
case FLASH_MAN_INTEL: mfct = "Intel"; break;
}
switch(info->flash_id & FLASH_TYPEMASK)
{
case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break;
case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break;
case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break;
case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break;
case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break;
case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break;
case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break;
case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break;
case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break;
case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break;
case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break;
}
}
printf(
"\n Brand: %s Type: %s\n"
" Size: %lu KB in %d Sectors\n",
mfct,
type,
info->size >> 10,
info->sector_count
);
printf (" Sector Start Addresses:");
for (i = 0; i < info->sector_count; i++)
{
unsigned long size;
unsigned int erased;
unsigned long * flash = (unsigned long *) info->start[i];
/*
* Check if whole sector is erased
*/
size =
(i != (info->sector_count - 1)) ?
(info->start[i + 1] - info->start[i]) >> 2 :
(info->start[0] + info->size - info->start[i]) >> 2;
for(
flash = (unsigned long *) info->start[i], erased = 1;
(flash != (unsigned long *) info->start[i] + size) && erased;
flash++
)
erased = *flash == ~0x0UL;
printf(
"%s %08lX %s %s",
(i % 5) ? "" : "\n ",
info->start[i],
erased ? "E" : " ",
info->protect[i] ? "RO" : " "
);
}
puts("\n");
return;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, last;
unsigned char sh8b;
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_MAN_STM | FLASH_AMD_COMP))) {
printf ("Can't erase unknown flash type - 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");
}
l_sect = -1;
/* Check the ROM CS */
if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
sh8b = 3;
else
sh8b = 0;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++)
{
if (info->protect[sect] == 0)
{ /* not protected */
addr = (FLASH_WORD_SIZE *)(info->start[0] + (
(info->start[sect] - info->start[0]) << sh8b));
if (info->flash_id & FLASH_MAN_SST)
{
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
udelay(30000); /* wait 30 ms */
}
else
addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
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 = (FLASH_WORD_SIZE *)(info->start[0] + (
(info->start[l_sect] - info->start[0]) << sh8b));
while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
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 */
serial_putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (FLASH_WORD_SIZE *)info->start[0];
addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* 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)
{
volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0];
volatile FLASH_WORD_SIZE *dest2;
volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
ulong start;
int flag;
int i;
unsigned char sh8b;
/* Check the ROM CS */
if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
sh8b = 3;
else
sh8b = 0;
dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) +
info->start[0]);
/* Check if Flash is (sufficiently) erased */
if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
{
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0;
dest2[i << sh8b] = data2[i];
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) !=
(data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
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