u-boot/board/dnp1110/flash.c

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/*
* (C) Copyright 2001
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
* 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>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/* Board support for 1 or 2 flash devices */
#undef FLASH_PORT_WIDTH32
#define FLASH_PORT_WIDTH16
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#ifdef FLASH_PORT_WIDTH16
#define FLASH_PORT_WIDTH ushort
#define FLASH_PORT_WIDTHV vu_short
#define SWAP(x) __swab16(x)
#else
#define FLASH_PORT_WIDTH ulong
#define FLASH_PORT_WIDTHV vu_long
#define SWAP(x) __swab32(x)
#endif
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#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
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#define mb() __asm__ __volatile__ ("" : : : "memory")
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/*-----------------------------------------------------------------------
* 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 void flash_get_offsets (ulong base, flash_info_t *info);
void inline spin_wheel(void);
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/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
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{
int i;
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ulong size = 0;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
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{
switch (i)
{
case 0:
flash_get_size((FPW *)PHYS_FLASH_1, &flash_info[i]);
flash_get_offsets(PHYS_FLASH_1, &flash_info[i]);
break;
default:
panic("configured too many flash banks!\n");
break;
}
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size += flash_info[i].size;
}
/* Protect monitor and environment sectors
*/
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_FLASH_BASE,
CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
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&flash_info[0]);
flash_protect(FLAG_PROTECT_SET,
CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
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&flash_info[0]);
return size;
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
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{
int i;
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if (info->flash_id == FLASH_UNKNOWN) {
return;
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}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
info->protect[i] = 0;
}
}
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}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t *info)
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{
int i;
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if (info->flash_id == FLASH_UNKNOWN) {
printf ("missing or unknown FLASH type\n");
return;
}
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switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_INTEL: printf ("INTEL "); break;
default: printf ("Unknown Vendor "); break;
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}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F128J3A:
printf ("28F128J3A\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;
}
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/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (FPW *addr, flash_info_t *info)
{
volatile FPW value;
/* Write auto select command: read Manufacturer ID */
addr[0x5555] = (FPW)0x00AA00AA;
addr[0x2AAA] = (FPW)0x00550055;
addr[0x5555] = (FPW)0x00900090;
mb();
value = addr[0];
switch (value) {
case (FPW)INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
break;
default:
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 */
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}
mb();
value = addr[1]; /* device ID */
switch (value) {
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case (FPW)INTEL_ID_28F128J3A:
info->flash_id += FLASH_28F128J3A;
info->sector_count = 128;
info->size = 0x02000000;
break; /* => 16 MB */
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default:
info->flash_id = FLASH_UNKNOWN;
break;
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}
if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
printf ("** ERROR: sector count %d > max (%d) **\n",
info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
}
addr[0] = (FPW)0x00FF00FF; /* restore read mode */
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return (info->size);
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}
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/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
ulong type, start, last;
int rcode = 0;
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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;
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}
type = (info->flash_id & FLASH_VENDMASK);
if ((type != FLASH_MAN_INTEL)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
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}
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();
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/* 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;
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printf("Erasing sector %2d ... ", sect);
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
*addr = (FPW)0x00500050; /* clear status register */
*addr = (FPW)0x00200020; /* erase setup */
*addr = (FPW)0x00D000D0; /* erase confirm */
while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
if (get_timer_masked() > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = (FPW)0x00B000B0; /* suspend erase */
*addr = (FPW)0x00FF00FF; /* reset to read mode */
rcode = 1;
break;
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}
}
*addr = (FPW)0x00500050; /* clear status register cmd. */
*addr = (FPW)0x00FF00FF; /* resest to read mode */
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printf (" done\n");
}
}
return rcode;
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}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
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*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp;
FPW data;
int count, i, l, rc, port_width;
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if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
/* get lower word aligned address */
#ifdef FLASH_PORT_WIDTH16
wp = (addr & ~1);
port_width = 2;
#else
wp = (addr & ~3);
port_width = 4;
#endif
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/*
* 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);
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}
for (; i<port_width && cnt>0; ++i) {
data = (data << 8) | *src++;
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--cnt;
++cp;
}
for (; cnt==0 && i<port_width; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
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}
if ((rc = write_data(info, wp, SWAP(data))) != 0) {
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return (rc);
}
wp += port_width;
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}
/*
* 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) {
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return (rc);
}
wp += port_width;
cnt -= port_width;
if (count++ > 0x800)
{
spin_wheel();
count = 0;
}
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}
if (cnt == 0) {
return (0);
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}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
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--cnt;
}
for (; i<port_width; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return (write_data(info, wp, SWAP(data)));
}
/*-----------------------------------------------------------------------
* 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 status;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
printf("not erased at %08lx (%x)\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 */
reset_timer_masked();
/* wait while polling the status register */
while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
if (get_timer_masked() > CONFIG_SYS_FLASH_WRITE_TOUT) {
*addr = (FPW)0x00FF00FF; /* restore read mode */
return (1);
}
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}
*addr = (FPW)0x00FF00FF; /* restore read mode */
return (0);
}
void inline
spin_wheel(void)
{
static int p=0;
static char w[] = "\\/-";
printf("\010%c", w[p]);
(++p == 3) ? (p = 0) : 0;
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}