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uboot-1.1.4-kirkwood/board/tqm8xx/flash.c

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u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (C) Copyright 2000-2004
* 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
*/
#if 0
#define DEBUG
#endif
#include <common.h>
#include <mpc8xx.h>
#include <environment.h>
#include <asm/processor.h>
#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M)
# ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
# define CFG_OR_TIMING_FLASH_AT_50MHZ (OR_ACS_DIV1 | OR_TRLX | OR_CSNT_SAM | \
OR_SCY_2_CLK | OR_EHTR | OR_BI)
# endif
#endif /* CONFIG_TQM8xxL/M, !TQM866M */
#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 */
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
unsigned long size_b0, size_b1;
int i;
#ifdef CFG_OR_TIMING_FLASH_AT_50MHZ
int scy, trlx, flash_or_timing, clk_diff;
DECLARE_GLOBAL_DATA_PTR;
scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
trlx = OR_TRLX;
scy *= 2;
} else
trlx = 0;
/* We assume that each 10MHz of bus clock require 1-clk SCY
* adjustment.
*/
clk_diff = (gd->bus_clk / 1000000) - 50;
/* We need proper rounding here. This is what the "+5" and "-5"
* are here for.
*/
if (clk_diff >= 0)
scy += (clk_diff + 5) / 10;
else
scy += (clk_diff - 5) / 10;
/* For bus frequencies above 50MHz, we want to use relaxed timing
* (OR_TRLX).
*/
if (gd->bus_clk >= 50000000)
trlx = OR_TRLX;
else
trlx = 0;
if (trlx)
scy /= 2;
if (scy > 0xf)
scy = 0xf;
if (scy < 1)
scy = 1;
flash_or_timing = (scy << 4) | trlx |
(CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK));
#endif
/* 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 */
debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size_b0, size_b0<<20);
}
size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
if (size_b1 > size_b0) {
printf ("## ERROR: "
"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
size_b1, size_b1<<20,
size_b0, size_b0<<20
);
flash_info[0].flash_id = FLASH_UNKNOWN;
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[0].sector_count = -1;
flash_info[1].sector_count = -1;
flash_info[0].size = 0;
flash_info[1].size = 0;
return (0);
}
debug ("## Before remap: "
"BR0: 0x%08x OR0: 0x%08x "
"BR1: 0x%08x OR1: 0x%08x\n",
memctl->memc_br0, memctl->memc_or0,
memctl->memc_br1, memctl->memc_or1);
/* Remap FLASH according to real size */
#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
#else
memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK);
#endif
memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
debug ("## BR0: 0x%08x OR0: 0x%08x\n",
memctl->memc_br0, memctl->memc_or0);
/* Re-do sizing to get full correct info */
size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
debug ("Protect monitor: %08lx ... %08lx\n",
(ulong)CFG_MONITOR_BASE,
(ulong)CFG_MONITOR_BASE + monitor_flash_len - 1);
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 */
# ifdef CFG_ENV_ADDR_REDUND
debug ("Protect primary environment: %08lx ... %08lx\n",
(ulong)CFG_ENV_ADDR,
(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
# else
debug ("Protect environment: %08lx ... %08lx\n",
(ulong)CFG_ENV_ADDR,
(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
# endif
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
&flash_info[0]);
#endif
#ifdef CFG_ENV_ADDR_REDUND
debug ("Protect redundand environment: %08lx ... %08lx\n",
(ulong)CFG_ENV_ADDR_REDUND,
(ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1);
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR_REDUND,
CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
&flash_info[0]);
#endif
if (size_b1) {
#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
#else
memctl->memc_or1 = flash_or_timing | (-size_b1 & 0xFFFF8000);
#endif
memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
BR_MS_GPCM | BR_V;
debug ("## BR1: 0x%08x OR1: 0x%08x\n",
memctl->memc_br1, memctl->memc_or1);
/* Re-do sizing to get full correct info */
size_b1 = flash_get_size((vu_long *)(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_SIZE-1,
&flash_info[1]);
#endif
} else {
memctl->memc_br1 = 0; /* invalidate bank */
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[1].sector_count = -1;
flash_info[1].size = 0;
debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n",
memctl->memc_br1, memctl->memc_or1);
}
debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
flash_info[0].size = size_b0;
flash_info[1].size = size_b1;
return (size_b0 + size_b1);
}
/*-----------------------------------------------------------------------
*/
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;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
#ifdef CONFIG_TQM8xxM /* mirror bit flash */
case FLASH_AMLV128U: printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
break;
case FLASH_AMLV320U: printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
break;
case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
break;
case FLASH_AMLV320B: printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
break;
# else /* ! TQM8xxM */
case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
break;
case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
break;
case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
break;
case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
break;
case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
break;
#endif /* TQM8xxM */
case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
break;
case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
break;
case FLASH_AMDL163B: printf ("AM29DL163B (16 Mbit, bottom boot sect)\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 (vu_long *addr, flash_info_t *info)
{
short i;
ulong value;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
addr[0x0555] = 0x00900090;
value = addr[0];
debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
switch (value) {
case AMD_MANUFACT:
debug ("Manufacturer: AMD\n");
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
debug ("Manufacturer: FUJITSU\n");
info->flash_id = FLASH_MAN_FUJ;
break;
default:
debug ("Manufacturer: *** unknown ***\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = addr[1]; /* device ID */
debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
switch (value) {
#ifdef CONFIG_TQM8xxM /* mirror bit flash */
case AMD_ID_MIRROR:
debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
addr[14], addr[15]);
/* Special case for AMLV320MH/L */
if ((addr[14] & 0x00ff00ff) == 0x001d001d &&
(addr[15] & 0x00ff00ff) == 0x00000000) {
debug ("Chip: AMLV320MH/L\n");
info->flash_id += FLASH_AMLV320U;
info->sector_count = 64;
info->size = 0x00800000; /* => 8 MB */
break;
}
switch(addr[14]) {
case AMD_ID_LV128U_2:
if (addr[15] != AMD_ID_LV128U_3) {
debug ("Chip: AMLV128U -> unknown\n");
info->flash_id = FLASH_UNKNOWN;
} else {
debug ("Chip: AMLV128U\n");
info->flash_id += FLASH_AMLV128U;
info->sector_count = 256;
info->size = 0x02000000;
}
break; /* => 32 MB */
case AMD_ID_LV640U_2:
if (addr[15] != AMD_ID_LV640U_3) {
debug ("Chip: AMLV640U -> unknown\n");
info->flash_id = FLASH_UNKNOWN;
} else {
debug ("Chip: AMLV640U\n");
info->flash_id += FLASH_AMLV640U;
info->sector_count = 128;
info->size = 0x01000000;
}
break; /* => 16 MB */
case AMD_ID_LV320B_2:
if (addr[15] != AMD_ID_LV320B_3) {
debug ("Chip: AMLV320B -> unknown\n");
info->flash_id = FLASH_UNKNOWN;
} else {
debug ("Chip: AMLV320B\n");
info->flash_id += FLASH_AMLV320B;
info->sector_count = 71;
info->size = 0x00800000;
}
break; /* => 8 MB */
default:
debug ("Chip: *** unknown ***\n");
info->flash_id = FLASH_UNKNOWN;
break;
}
break;
# else /* ! TQM8xxM */
case AMD_ID_LV400T:
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV400B:
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV800T:
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case AMD_ID_LV800B:
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case AMD_ID_LV320T:
info->flash_id += FLASH_AM320T;
info->sector_count = 71;
info->size = 0x00800000;
break; /* => 8 MB */
case AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 71;
info->size = 0x00800000;
break; /* => 8 MB */
#endif /* TQM8xxM */
case AMD_ID_LV160T:
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case AMD_ID_LV160B:
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case AMD_ID_DL163B:
info->flash_id += FLASH_AMDL163B;
info->sector_count = 39;
info->size = 0x00400000;
break; /* => 4 MB */
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
/* set up sector start address table */
switch (value) {
#ifdef CONFIG_TQM8xxM /* mirror bit flash */
case AMD_ID_MIRROR:
switch (info->flash_id & FLASH_TYPEMASK) {
/* only known types here - no default */
case FLASH_AMLV128U:
case FLASH_AMLV640U:
case FLASH_AMLV320U:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
base += 0x20000;
}
break;
case FLASH_AMLV320B:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
/*
* The first 8 sectors are 8 kB,
* all the other ones are 64 kB
*/
base += (i < 8)
? 2 * ( 8 << 10)
: 2 * (64 << 10);
}
break;
}
break;
# else /* ! TQM8xxM */
case AMD_ID_LV400B:
case AMD_ID_LV800B:
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
}
break;
case AMD_ID_LV400T:
case AMD_ID_LV800T:
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
break;
case AMD_ID_LV320B:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
/*
* The first 8 sectors are 8 kB,
* all the other ones are 64 kB
*/
base += (i < 8)
? 2 * ( 8 << 10)
: 2 * (64 << 10);
}
break;
case AMD_ID_LV320T:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
/*
* The last 8 sectors are 8 kB,
* all the other ones are 64 kB
*/
base += (i < (info->sector_count - 8))
? 2 * (64 << 10)
: 2 * ( 8 << 10);
}
break;
#endif /* TQM8xxM */
case AMD_ID_LV160B:
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
}
break;
case AMD_ID_LV160T:
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
break;
case AMD_ID_DL163B:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
/*
* The first 8 sectors are 8 kB,
* all the other ones are 64 kB
*/
base += (i < 8)
? 2 * ( 8 << 10)
: 2 * (64 << 10);
}
break;
default:
return (0);
break;
}
#if 0
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
/* D0 = 1 if protected */
addr = (volatile unsigned long *)(info->start[i]);
info->protect[i] = addr[2] & 1;
}
#endif
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (volatile unsigned long *)info->start[0];
*addr = 0x00F000F0; /* reset bank */
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_long *addr = (vu_long*)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, 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");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
addr[0x0555] = 0x00800080;
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_long*)(info->start[sect]);
addr[0] = 0x00300030;
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 = (vu_long*)(info->start[l_sect]);
while ((addr[0] & 0x00800080) != 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 */
putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (volatile unsigned long *)info->start[0];
addr[0] = 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)
{
vu_long *addr = (vu_long*)(info->start[0]);
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *)dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
addr[0x0555] = 0x00A000A0;
*((vu_long *)dest) = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
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