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u-boot/board/alaska/flash.c
Wolfgang Denk 010162eb72 Implement h/w sector protection status synchronization at boot. 
The code is provided for, and was tested on, the Yukon/Alaska
and PM520 boards only.

A bug in flash_real_protect() for the Yukon board was fixed by adding
a function that tells if two banks are on one flash chip.
2005-07-30 16:39:27 +02:00

936 lines
23 KiB
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/*
* (C) Copyright 2001
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* (C) Copyright 2001-2004
* 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 <linux/byteorder/swab.h>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/* Board support for 1 or 2 flash devices */
#define FLASH_PORT_WIDTH8
typedef unsigned char FLASH_PORT_WIDTH;
typedef volatile unsigned char FLASH_PORT_WIDTHV;
#define SWAP(x) (x)
/* Intel-compatible flash ID */
#define INTEL_COMPAT 0x89
#define INTEL_ALT 0xB0
/* Intel-compatible flash commands */
#define INTEL_PROGRAM 0x10
#define INTEL_ERASE 0x20
#define INTEL_CLEAR 0x50
#define INTEL_LOCKBIT 0x60
#define INTEL_PROTECT 0x01
#define INTEL_STATUS 0x70
#define INTEL_READID 0x90
#define INTEL_CONFIRM 0xD0
#define INTEL_RESET 0xFF
/* Intel-compatible flash status bits */
#define INTEL_FINISHED 0x80
#define INTEL_OK 0x80
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
#define FLASH_CYCLE1 0x0555
#define FLASH_CYCLE2 0x02aa
#define WR_BLOCK 0x20
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (FPW * addr, flash_info_t * info);
static int write_data (flash_info_t * info, ulong dest, FPW data);
static int write_data_block (flash_info_t * info, ulong src, ulong dest);
static int write_word_amd (flash_info_t * info, FPWV * dest, FPW data);
static void flash_get_offsets (ulong base, flash_info_t * info);
void inline spin_wheel (void);
static void flash_sync_real_protect (flash_info_t * info);
static unsigned char intel_sector_protected (flash_info_t *info, ushort sector);
static unsigned char same_chip_banks (int bank1, int bank2);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
int i;
ulong size = 0;
ulong fsize = 0;
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
memset (&flash_info[i], 0, sizeof (flash_info_t));
switch (i) {
case 0:
flash_get_size ((FPW *) CFG_FLASH1_BASE,
&flash_info[i]);
flash_get_offsets (CFG_FLASH1_BASE, &flash_info[i]);
break;
case 1:
flash_get_size ((FPW *) CFG_FLASH1_BASE,
&flash_info[i]);
fsize = CFG_FLASH1_BASE + flash_info[i - 1].size;
flash_get_offsets (fsize, &flash_info[i]);
break;
case 2:
flash_get_size ((FPW *) CFG_FLASH0_BASE,
&flash_info[i]);
flash_get_offsets (CFG_FLASH0_BASE, &flash_info[i]);
break;
case 3:
flash_get_size ((FPW *) CFG_FLASH0_BASE,
&flash_info[i]);
fsize = CFG_FLASH0_BASE + flash_info[i - 1].size;
flash_get_offsets (fsize, &flash_info[i]);
break;
default:
panic ("configured to many flash banks!\n");
break;
}
size += flash_info[i].size;
/* get the h/w and s/w protection status in sync */
flash_sync_real_protect(&flash_info[i]);
}
/* Protect monitor and environment sectors
*/
#if defined (CFG_AMD_BOOT)
flash_protect (FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1,
&flash_info[2]);
flash_protect (FLAG_PROTECT_SET,
CFG_INTEL_BASE,
CFG_INTEL_BASE + monitor_flash_len - 1,
&flash_info[1]);
#else
flash_protect (FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1,
&flash_info[3]);
flash_protect (FLAG_PROTECT_SET,
CFG_AMD_BASE,
CFG_AMD_BASE + monitor_flash_len - 1, &flash_info[0]);
#endif
flash_protect (FLAG_PROTECT_SET,
CFG_ENV1_ADDR,
CFG_ENV1_ADDR + CFG_ENV1_SIZE - 1, &flash_info[1]);
flash_protect (FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[3]);
return size;
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t * info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN)
return;
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * PHYS_AMD_SECT_SIZE);
info->protect[i] = 0;
}
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * PHYS_INTEL_SECT_SIZE);
}
}
}
/*-----------------------------------------------------------------------
*/
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_INTEL:
printf ("INTEL ");
break;
case FLASH_MAN_AMD:
printf ("AMD ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F128J3A:
printf ("28F128J3A\n");
break;
case FLASH_AM040:
printf ("AMD29F040B\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 (FPW * addr, flash_info_t * info)
{
FPWV value;
static int amd = 0;
/* Write auto select command: read Manufacturer ID */
/* Write auto select command sequence and test FLASH answer */
addr[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */
__asm__ ("sync");
addr[FLASH_CYCLE2] = (FPW) 0x00550055; /* for AMD, Intel ignores this */
__asm__ ("sync");
addr[FLASH_CYCLE1] = (FPW) 0x00900090; /* selects Intel or AMD */
__asm__ ("sync");
udelay (100);
switch (addr[0] & 0xff) {
case (uchar) AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
value = addr[1];
break;
case (uchar) INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
value = addr[2];
break;
default:
printf ("unknown\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
return (0); /* no or unknown flash */
}
switch (value) {
case (FPW) INTEL_ID_28F128J3A:
info->flash_id += FLASH_28F128J3A;
info->sector_count = 64;
info->size = 0x00800000; /* => 16 MB */
break;
case (FPW) AMD_ID_LV040B:
info->flash_id += FLASH_AM040;
if (amd == 0) {
info->sector_count = 7;
info->size = 0x00070000; /* => 448 KB */
amd = 1;
} else {
/* for Environment settings */
info->sector_count = 1;
info->size = PHYS_AMD_SECT_SIZE; /* => 64 KB */
amd = 0;
}
break;
default:
info->flash_id = FLASH_UNKNOWN;
break;
}
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;
}
if (value == (FPW) INTEL_ID_28F128J3A)
addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
else
addr[0] = (FPW) 0x00F000F0; /* restore read mode */
return (info->size);
}
/*
* This function gets the u-boot flash sector protection status
* (flash_info_t.protect[]) in sync with the sector protection
* status stored in hardware.
*/
static void flash_sync_real_protect (flash_info_t * info)
{
int i;
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F128J3A:
for (i = 0; i < info->sector_count; ++i) {
info->protect[i] = intel_sector_protected(info, i);
}
break;
case FLASH_AM040:
default:
/* no h/w protect support */
break;
}
}
/*
* checks if "sector" in bank "info" is protected. Should work on intel
* strata flash chips 28FxxxJ3x in 8-bit mode.
* Returns 1 if sector is protected (or timed-out while trying to read
* protection status), 0 if it is not.
*/
static unsigned char intel_sector_protected (flash_info_t *info, ushort sector)
{
FPWV *addr;
FPWV *lock_conf_addr;
ulong start;
unsigned char ret;
/*
* first, wait for the WSM to be finished. The rationale for
* waiting for the WSM to become idle for at most
* CFG_FLASH_ERASE_TOUT is as follows. The WSM can be busy
* because of: (1) erase, (2) program or (3) lock bit
* configuration. So we just wait for the longest timeout of
* the (1)-(3), i.e. the erase timeout.
*/
/* wait at least 35ns (W12) before issuing Read Status Register */
udelay(1);
addr = (FPWV *) info->start[sector];
*addr = (FPW) INTEL_STATUS;
start = get_timer (0);
while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
*addr = (FPW) INTEL_RESET; /* restore read mode */
printf("WSM busy too long, can't get prot status\n");
return 1;
}
}
/* issue the Read Identifier Codes command */
*addr = (FPW) INTEL_READID;
/* wait at least 35ns (W12) before reading */
udelay(1);
/* Intel example code uses offset of 4 for 8-bit flash */
lock_conf_addr = (FPWV *) info->start[sector] + 4;
ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0;
/* put flash back in read mode */
*addr = (FPW) INTEL_RESET;
return ret;
}
/*
* Checks if "bank1" and "bank2" are on the same chip. Returns 1 if they
* are and 0 otherwise.
*/
static unsigned char same_chip_banks (int bank1, int bank2)
{
unsigned char same_chip[CFG_MAX_FLASH_BANKS][CFG_MAX_FLASH_BANKS] = {
{1, 1, 0, 0},
{1, 1, 0, 0},
{0, 0, 1, 1},
{0, 0, 1, 1}
};
return same_chip[bank1][bank2];
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
int flag, prot, sect;
ulong type, start, last;
int rcode = 0, intel = 0;
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;
}
type = (info->flash_id & FLASH_VENDMASK);
if ((type != FLASH_MAN_INTEL)) {
type = (info->flash_id & FLASH_VENDMASK);
if ((type != FLASH_MAN_AMD)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
}
}
if (type == FLASH_MAN_INTEL)
intel = 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;
/* 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 */
FPWV *addr = (FPWV *) (info->start[sect]);
FPW status;
printf ("Erasing sector %2d ... ", sect);
/* arm simple, non interrupt dependent timer */
start = get_timer (0);
if (intel) {
*addr = (FPW) 0x00500050; /* clear status register */
*addr = (FPW) 0x00200020; /* erase setup */
*addr = (FPW) 0x00D000D0; /* erase confirm */
} else {
FPWV *base; /* first address in bank */
base = (FPWV *) (CFG_AMD_BASE);
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
base[FLASH_CYCLE1] = (FPW) 0x00800080; /* erase mode */
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
*addr = (FPW) 0x00300030; /* erase sector */
}
while (((status =
*addr) & (FPW) 0x00800080) !=
(FPW) 0x00800080) {
if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
if (intel) {
*addr = (FPW) 0x00B000B0; /* suspend erase */
*addr = (FPW) 0x00FF00FF; /* reset to read mode */
} else
*addr = (FPW) 0x00F000F0; /* reset to read mode */
rcode = 1;
break;
}
}
if (intel) {
*addr = (FPW) 0x00500050; /* clear status register cmd. */
*addr = (FPW) 0x00FF00FF; /* resest to read mode */
} else
*addr = (FPW) 0x00F000F0; /* reset to read mode */
printf (" done\n");
}
}
return rcode;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_AMD:
{
FPW data = 0; /* 16 or 32 bit word, matches flash bus width */
int bytes; /* number of bytes to program in current word */
int left; /* number of bytes left to program */
int i, res;
for (left = cnt, res = 0;
left > 0 && res == 0;
addr += sizeof (data), left -=
sizeof (data) - bytes) {
bytes = addr & (sizeof (data) - 1);
addr &= ~(sizeof (data) - 1);
/* combine source and destination data so can program
* an entire word of 16 or 32 bits
*/
for (i = 0; i < sizeof (data); i++) {
data <<= 8;
if (i < bytes || i - bytes >= left)
data += *((uchar *) addr + i);
else
data += *src++;
}
res = write_word_amd (info, (FPWV *) addr,
data);
}
return res;
} /* case FLASH_MAN_AMD */
case FLASH_MAN_INTEL:
{
ulong cp, wp;
FPW data;
int count, i, l, rc, port_width;
/* get lower word aligned address */
wp = addr;
port_width = 1;
/*
* 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 < port_width && cnt > 0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt == 0 && i < port_width; ++i, ++cp)
data = (data << 8) | (*(uchar *) cp);
if ((rc =
write_data (info, wp, SWAP (data))) != 0)
return (rc);
wp += port_width;
}
if (cnt > WR_BLOCK) {
/*
* handle word aligned part
*/
count = 0;
while (cnt >= WR_BLOCK) {
if ((rc =
write_data_block (info,
(ulong) src,
wp)) != 0)
return (rc);
wp += WR_BLOCK;
src += WR_BLOCK;
cnt -= WR_BLOCK;
if (count++ > 0x800) {
spin_wheel ();
count = 0;
}
}
}
if (cnt < WR_BLOCK) {
/*
* handle word aligned part
*/
count = 0;
while (cnt >= port_width) {
data = 0;
for (i = 0; i < port_width; ++i)
data = (data << 8) | *src++;
if ((rc =
write_data (info, wp,
SWAP (data))) != 0)
return (rc);
wp += port_width;
cnt -= port_width;
if (count++ > 0x800) {
spin_wheel ();
count = 0;
}
}
}
if (cnt == 0)
return (0);
/*
* handle unaligned tail bytes
*/
data = 0;
for (i = 0, cp = wp; i < port_width && cnt > 0;
++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i < port_width; ++i, ++cp)
data = (data << 8) | (*(uchar *) cp);
return (write_data (info, wp, SWAP (data)));
} /* case FLASH_MAN_INTEL */
} /* switch */
return (0);
}
/*-----------------------------------------------------------------------
* Write a word or halfword to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t * info, ulong dest, FPW data)
{
FPWV *addr = (FPWV *) dest;
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
*addr = (FPW) 0x00400040; /* write setup */
*addr = data;
/* arm simple, non interrupt dependent timer */
start = get_timer (0);
/* wait while polling the status register */
while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
*addr = (FPW) 0x00FF00FF; /* restore read mode */
return (1);
}
}
*addr = (FPW) 0x00FF00FF; /* restore read mode */
return (0);
}
/*-----------------------------------------------------------------------
* Write a word or halfword to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data_block (flash_info_t * info, ulong src, ulong dest)
{
FPWV *srcaddr = (FPWV *) src;
FPWV *dstaddr = (FPWV *) dest;
ulong start;
int flag, i;
/* Check if Flash is (sufficiently) erased */
for (i = 0; i < WR_BLOCK; i++)
if ((*dstaddr++ & 0xff) != 0xff) {
printf ("not erased at %08lx (%lx)\n",
(ulong) dstaddr, *dstaddr);
return (2);
}
dstaddr = (FPWV *) dest;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
*dstaddr = (FPW) 0x00e800e8; /* write block setup */
/* arm simple, non interrupt dependent timer */
start = get_timer (0);
/* wait while polling the status register */
while ((*dstaddr & (FPW) 0x00800080) != (FPW) 0x00800080) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
*dstaddr = (FPW) 0x00FF00FF; /* restore read mode */
return (1);
}
}
*dstaddr = (FPW) 0x001f001f; /* write 32 to buffer */
for (i = 0; i < WR_BLOCK; i++)
*dstaddr++ = *srcaddr++;
dstaddr -= 1;
*dstaddr = (FPW) 0x00d000d0; /* write 32 to buffer */
/* arm simple, non interrupt dependent timer */
start = get_timer (0);
/* wait while polling the status register */
while ((*dstaddr & (FPW) 0x00800080) != (FPW) 0x00800080) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
*dstaddr = (FPW) 0x00FF00FF; /* restore read mode */
return (1);
}
}
*dstaddr = (FPW) 0x00FF00FF; /* restore read mode */
return (0);
}
/*-----------------------------------------------------------------------
* 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, FPWV * dest, FPW data)
{
ulong start;
int flag;
int res = 0; /* result, assume success */
FPWV *base; /* first address in flash bank */
/* Check if Flash is (sufficiently) erased */
if ((*dest & data) != data) {
return (2);
}
base = (FPWV *) (CFG_AMD_BASE);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
base[FLASH_CYCLE1] = (FPW) 0x00A000A0; /* selects program mode */
*dest = data; /* start programming the data */
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
start = get_timer (0);
/* data polling for D7 */
while (res == 0
&& (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
*dest = (FPW) 0x00F000F0; /* reset bank */
res = 1;
}
}
return (res);
}
void inline spin_wheel (void)
{
static int p = 0;
static char w[] = "\\/-";
printf ("\010%c", w[p]);
(++p == 3) ? (p = 0) : 0;
}
/*-----------------------------------------------------------------------
* Set/Clear sector's lock bit, returns:
* 0 - OK
* 1 - Error (timeout, voltage problems, etc.)
*/
int flash_real_protect (flash_info_t * info, long sector, int prot)
{
ulong start;
int i, j;
int curr_bank;
int bank;
int rc = 0;
FPWV *addr = (FPWV *) (info->start[sector]);
int flag = disable_interrupts ();
/*
* 29F040B AMD flash does not support software protection/unprotection,
* the only way to protect the AMD flash is marked it as prot bit.
* This flash only support hardware protection, by supply or not supply
* 12vpp to the flash
*/
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
info->protect[sector] = prot;
return 0;
}
*addr = INTEL_CLEAR; /* Clear status register */
if (prot) { /* Set sector lock bit */
*addr = INTEL_LOCKBIT; /* Sector lock bit */
*addr = INTEL_PROTECT; /* set */
} else { /* Clear sector lock bit */
*addr = INTEL_LOCKBIT; /* All sectors lock bits */
*addr = INTEL_CONFIRM; /* clear */
}
start = get_timer (0);
while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
if (get_timer (start) > CFG_FLASH_UNLOCK_TOUT) {
printf ("Flash lock bit operation timed out\n");
rc = 1;
break;
}
}
if (*addr != INTEL_OK) {
printf ("Flash lock bit operation failed at %08X, CSR=%08X\n",
(uint) addr, (uint) * addr);
rc = 1;
}
if (!rc)
info->protect[sector] = prot;
/*
* Clear lock bit command clears all sectors lock bits, so
* we have to restore lock bits of protected sectors.
*/
if (!prot) {
/*
* re-locking must be done for all banks that belong on one
* FLASH chip, as all the sectors on the chip were unlocked
* by INTEL_LOCKBIT/INTEL_CONFIRM commands. (let's hope
* that banks never span chips, in particular chips which
* support h/w protection differently).
*/
/* find the current bank number */
curr_bank = CFG_MAX_FLASH_BANKS + 1;
for (j = 0; j < CFG_MAX_FLASH_BANKS; ++j) {
if (&flash_info[j] == info) {
curr_bank = j;
}
}
if (curr_bank == CFG_MAX_FLASH_BANKS + 1) {
printf("Error: can't determine bank number!\n");
}
for (bank = 0; bank < CFG_MAX_FLASH_BANKS; ++bank) {
if (!same_chip_banks(curr_bank, bank)) {
continue;
}
info = &flash_info[bank];
for (i = 0; i < info->sector_count; i++) {
if (info->protect[i]) {
start = get_timer (0);
addr = (FPWV *) (info->start[i]);
*addr = INTEL_LOCKBIT; /* Sector lock bit */
*addr = INTEL_PROTECT; /* set */
while ((*addr & INTEL_FINISHED) !=
INTEL_FINISHED) {
if (get_timer (start) >
CFG_FLASH_UNLOCK_TOUT) {
printf ("Flash lock bit operation timed out\n");
rc = 1;
break;
}
}
}
}
}
/*
* get the s/w sector protection status in sync with the h/w,
* in case something went wrong during the re-locking.
*/
flash_sync_real_protect(info); /* resets flash to read mode */
}
if (flag)
enable_interrupts ();
*addr = INTEL_RESET; /* Reset to read array mode */
return rc;
}
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