u-boot/board/adderII/flash.c
wdenk 0cb61d7ddd Patch by Raghu Krishnaprasad, 7 Aug 2003:
add support for Adder II MPC852T module
2003-08-30 00:05:50 +00:00

501 lines
13 KiB
C

/*
* (C) Copyright 2000-2003
* 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
*/
/******************************************************************************
** Notes: AM29LV320DB - 90EI ( 32 Mbit device )
** Sectors - Eight 8 Kb sector
** - Sixty three 64 Kb sector
** Bottom boot sector
******************************************************************************/
#include <common.h>
#include <mpc8xx.h>
/******************************************************************************
** Defines
******************************************************************************/
#ifdef CONFIG_ADDERII
#define ADDR0 0x0555
#define ADDR1 0x02AA
#define FLASH_WORD_SIZE unsigned short
#endif
#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
/******************************************************************************
** Global Parameters
******************************************************************************/
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/******************************************************************************
** Function Prototypes
******************************************************************************/
static ulong flash_get_size( vu_long *addr, flash_info_t *info );
static int write_word( flash_info_t *info, ulong dest, ulong data );
static void flash_get_offsets( ulong base, flash_info_t *info );
int wait_for_DQ7( flash_info_t *info, int sect );
/******************************************************************************
** Function : flash_init
** Param : void
** Notes : Initializes the Flash Chip
******************************************************************************/
ulong flash_init (void)
{
ulong size_b0 = -1;
int i;
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
/* Set Flash to unknown */
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Get the Flash Bank Size */
size_b0 = flash_get_size ((vu_long *) (CFG_FLASH_BASE),
&flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## UNKNOWN Flash on Bank 0 - Size = 0x%08lx = %ldMB\n",
size_b0, size_b0 >> 20);
}
/* Remap Flash according to size detected */
memctl->memc_or0 = 0xFF800774;
memctl->memc_br0 = CFG_BR0_PRELIM;
/* Setup Flash Sector Offsets */
flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
/* Monitor Protection ON - default */
#if ( CFG_MONITOR_BASE >= CFG_FLASH_BASE )
flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,
(CFG_MONITOR_BASE + monitor_flash_len - 1),
&flash_info[0]);
#endif
/* Protect Environment Variables */
#ifdef CFG_ENV_IS_IN_FLASH
flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR,
(CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]);
#endif
return size_b0;
}
/******************************************************************************
** Function : flash_get_offsets
** Param : ulong base, flash_into_t *info
** Notes :
******************************************************************************/
static void flash_get_offsets (ulong base, flash_info_t * info)
{
return;
}
/******************************************************************************
** Function : flash_print_info
** Param : flash_info_t
** Notes :
******************************************************************************/
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_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;
}
/******************************************************************************
** Function : flash_get_size
** Param : vu_long *addr, flash_info_t *info
** Notes :
******************************************************************************/
static ulong flash_get_size (vu_long * addr, flash_info_t * info)
{
short i;
FLASH_WORD_SIZE manu_id, dev_id;
ulong base = (ulong) addr;
volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
/* Write Auto Select Command and read Manufacturer's ID and Dev ID */
addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;
addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;
addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;
manu_id = addr2[0];
switch (manu_id) {
case (FLASH_WORD_SIZE) AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}
/* Read Device Id */
dev_id = addr2[1];
switch (dev_id) {
case (FLASH_WORD_SIZE) AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 71; /* 8 - boot sec + 63 normal */
info->size = 0x400000; /* 4MByte */
break;
default:
info->flash_id = FLASH_UNKNOWN;
break;
}
/* Set up sector start Addresses */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block
** Eight 8 Kb Boot sectors
** Sixty Three 64Kb sectors
*/
for (i = 0; i < 8; i++) {
info->start[i] = base + (i * 0x00002000);
}
for (i = 8; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00010000) - 0x00070000;
}
}
/* Reset To read mode */
if (info->flash_id != FLASH_UNKNOWN) {
addr = (ulong *) info->start[0];
*addr = 0xF0F0F0F0;
}
return (info->size);
}
/*******************************************************************************
** Function : flash_erase
** Param : flash_info_t *info, int s_first, int s_last
** Notes :
******************************************************************************/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
volatile FLASH_WORD_SIZE *addr2;
int flag, prot, sect, l_sect;
int i;
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) {
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;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
if ((info->flash_id & FLASH_VENDMASK) ==
FLASH_MAN_SST) {
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
for (i = 0; i < 50; i++)
udelay (1000); /* wait 1 ms */
} else {
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
}
l_sect = sect;
/*
* Wait for each sector to complete, it's more
* reliable. According to AMD Spec, you must
* issue all erase commands within a specified
* timeout. This has been seen to fail, especially
* if printf()s are included (for debug)!!
*/
wait_for_DQ7 (info, sect);
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/* reset to read mode */
addr = (FLASH_WORD_SIZE *) info->start[0];
addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
printf (" done\n");
return 0;
}
int wait_for_DQ7 (flash_info_t * info, int sect)
{
ulong start, now, last;
volatile FLASH_WORD_SIZE *addr =
(FLASH_WORD_SIZE *) (info->start[sect]);
start = get_timer (0);
last = start;
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) {
putc ('.');
last = now;
}
}
return 0;
}
/******************************************************************************
** Function : write_buff
** Param : flash_info_t *info, uchar *src, ulong addr, ulong cnt
** Notes :
******************************************************************************/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
/* get lower word aligned address */
wp = (addr & ~3);
/*
* 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));
}
/******************************************************************************
** Function : write_word
** Param : flash_info_t *info, ulong dest, ulong data
** Notes :
******************************************************************************/
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 = (FLASH_WORD_SIZE *) dest;
volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
ulong start;
int i;
/* Check if Flash is (sufficiently) erased */
if ((*((volatile FLASH_WORD_SIZE *) dest) &
(FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
return (2);
}
for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
int flag;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
dest2[i] = data2[i];
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* data polling for D7 */
start = get_timer (0);
while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
}
return (0);
}