mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-27 13:33:40 +00:00
5f535fe170
- fix spelling errors
- set GD_FLG_DEVINIT flag only after device function pointers
are valid
- Allow CFG_ALT_MEMTEST on systems where address zero isn't
writeable
- enable 3.rd UART (ST-UART) on PXA(XScale) CPUs
- trigger watchdog while waiting in serial driver
637 lines
14 KiB
C
637 lines
14 KiB
C
/*
|
|
* (C) Copyright 2002, 2003
|
|
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.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 <asm/io.h>
|
|
#include <pci.h>
|
|
#include <asm/ic/sc520.h>
|
|
|
|
#define PROBE_BUFFER_SIZE 1024
|
|
static unsigned char buffer[PROBE_BUFFER_SIZE];
|
|
|
|
#define SC520_MAX_FLASH_BANKS 3
|
|
#define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
|
|
#define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
|
|
#define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
|
|
#define SC520_FLASH_BANKSIZE 0x8000000
|
|
|
|
#define AMD29LV016B_SIZE 0x200000
|
|
#define AMD29LV016B_SECTORS 32
|
|
|
|
flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
|
|
|
|
#define READY 1
|
|
#define ERR 2
|
|
#define TMO 4
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
|
|
|
|
static u32 _probe_flash(u32 addr, u32 bw, int il)
|
|
{
|
|
u32 result=0;
|
|
|
|
/* First do an unlock cycle for the benefit of
|
|
* devices that need it */
|
|
|
|
switch (bw) {
|
|
|
|
case 1:
|
|
*(volatile u8*)(addr+0x5555) = 0xaa;
|
|
*(volatile u8*)(addr+0x2aaa) = 0x55;
|
|
*(volatile u8*)(addr+0x5555) = 0x90;
|
|
|
|
/* Read vendor */
|
|
result = *(volatile u8*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u8*)(addr+2);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u8*)addr = 0xff;
|
|
*(volatile u8*)(addr+0x5555), 0xf0;
|
|
break;
|
|
|
|
case 2:
|
|
*(volatile u16*)(addr+0xaaaa) = 0xaaaa;
|
|
*(volatile u16*)(addr+0x5554) = 0x5555;
|
|
|
|
/* Issue identification command */
|
|
if (il == 2) {
|
|
*(volatile u16*)(addr+0xaaaa) = 0x9090;
|
|
|
|
/* Read vendor */
|
|
result = *(volatile u8*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u8*)(addr+2);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u16*)addr = 0xffff;
|
|
*(volatile u16*)(addr+0xaaaa), 0xf0f0;
|
|
|
|
} else {
|
|
*(volatile u8*)(addr+0xaaaa) = 0x90;
|
|
/* Read vendor */
|
|
result = *(volatile u16*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u16*)(addr+2);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u8*)addr = 0xff;
|
|
*(volatile u8*)(addr+0xaaaa), 0xf0;
|
|
}
|
|
|
|
break;
|
|
|
|
case 4:
|
|
*(volatile u32*)(addr+0x5554) = 0xaaaaaaaa;
|
|
*(volatile u32*)(addr+0xaaa8) = 0x55555555;
|
|
|
|
switch (il) {
|
|
case 1:
|
|
/* Issue identification command */
|
|
*(volatile u8*)(addr+0x5554) = 0x90;
|
|
|
|
/* Read vendor */
|
|
result = *(volatile u16*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u16*)(addr+4);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u8*)addr = 0xff;
|
|
*(volatile u8*)(addr+0x5554), 0xf0;
|
|
break;
|
|
|
|
case 2:
|
|
/* Issue identification command */
|
|
*(volatile u32*)(addr + 0x5554) = 0x00900090;
|
|
|
|
/* Read vendor */
|
|
result = *(volatile u16*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u16*)(addr+4);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u32*)addr = 0x00ff00ff;
|
|
*(volatile u32*)(addr+0x5554), 0x00f000f0;
|
|
break;
|
|
|
|
case 4:
|
|
/* Issue identification command */
|
|
*(volatile u32*)(addr+0x5554) = 0x90909090;
|
|
|
|
/* Read vendor */
|
|
result = *(volatile u8*)addr;
|
|
result <<= 16;
|
|
|
|
/* Read device */
|
|
result |= *(volatile u8*)(addr+4);
|
|
|
|
/* Return device to data mode */
|
|
*(volatile u32*)addr = 0xffffffff;
|
|
*(volatile u32*)(addr+0x5554), 0xf0f0f0f0;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
return result;
|
|
}
|
|
|
|
extern int _probe_flash_end;
|
|
asm ("_probe_flash_end:\n"
|
|
".long 0\n");
|
|
|
|
static int identify_flash(unsigned address, int width)
|
|
{
|
|
int is;
|
|
int device;
|
|
int vendor;
|
|
int size;
|
|
unsigned res;
|
|
|
|
u32 (*_probe_flash_ptr)(u32 a, u32 bw, int il);
|
|
|
|
size = (unsigned)&_probe_flash_end - (unsigned)_probe_flash;
|
|
|
|
if (size > PROBE_BUFFER_SIZE) {
|
|
printf("_probe_flash() routine too large (%d) %p - %p\n",
|
|
size, &_probe_flash_end, _probe_flash);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(buffer, _probe_flash, size);
|
|
_probe_flash_ptr = (void*)buffer;
|
|
|
|
is = disable_interrupts();
|
|
res = _probe_flash_ptr(address, width, 1);
|
|
if (is) {
|
|
enable_interrupts();
|
|
}
|
|
|
|
|
|
vendor = res >> 16;
|
|
device = res & 0xffff;
|
|
|
|
|
|
return res;
|
|
}
|
|
|
|
ulong flash_init(void)
|
|
{
|
|
int i, j;
|
|
ulong size = 0;
|
|
|
|
for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
|
|
unsigned id;
|
|
ulong flashbase = 0;
|
|
int sectsize = 0;
|
|
|
|
memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
|
|
switch (i) {
|
|
case 0:
|
|
flashbase = SC520_FLASH_BANK0_BASE;
|
|
break;
|
|
case 1:
|
|
flashbase = SC520_FLASH_BANK1_BASE;
|
|
break;
|
|
case 2:
|
|
flashbase = SC520_FLASH_BANK2_BASE;
|
|
break;
|
|
default:
|
|
panic("configured too many flash banks!\n");
|
|
}
|
|
|
|
id = identify_flash(flashbase, 4);
|
|
switch (id & 0x00ff00ff) {
|
|
case 0x000100c8:
|
|
/* 29LV016B/29LV017B */
|
|
flash_info[i].flash_id =
|
|
(AMD_MANUFACT & FLASH_VENDMASK) |
|
|
(AMD_ID_LV016B & FLASH_TYPEMASK);
|
|
|
|
flash_info[i].size = AMD29LV016B_SIZE*4;
|
|
flash_info[i].sector_count = AMD29LV016B_SECTORS;
|
|
sectsize = (AMD29LV016B_SIZE*4)/AMD29LV016B_SECTORS;
|
|
printf("Bank %d: 4 x AMD 29LV017B\n", i);
|
|
break;
|
|
|
|
|
|
default:
|
|
printf("Bank %d have unknown flash %08x\n", i, id);
|
|
flash_info[i].flash_id = FLASH_UNKNOWN;
|
|
continue;
|
|
}
|
|
|
|
for (j = 0; j < flash_info[i].sector_count; j++) {
|
|
flash_info[i].start[j] = flashbase + j * sectsize;
|
|
}
|
|
size += flash_info[i].size;
|
|
|
|
flash_protect(FLAG_PROTECT_CLEAR,
|
|
flash_info[i].start[0],
|
|
flash_info[i].start[0] + flash_info[i].size - 1,
|
|
&flash_info[i]);
|
|
}
|
|
|
|
/*
|
|
* Protect monitor and environment sectors
|
|
*/
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
i386boot_start,
|
|
i386boot_end,
|
|
&flash_info[0]);
|
|
#ifdef CFG_ENV_ADDR
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
CFG_ENV_ADDR,
|
|
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
|
|
&flash_info[0]);
|
|
#endif
|
|
return size;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
void flash_print_info(flash_info_t *info)
|
|
{
|
|
int i;
|
|
|
|
switch (info->flash_id & FLASH_VENDMASK) {
|
|
|
|
case (AMD_MANUFACT & FLASH_VENDMASK):
|
|
printf("AMD: ");
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
|
case (AMD_ID_LV016B & FLASH_TYPEMASK):
|
|
printf("4x AMD29LV017B (4x16Mbit)\n");
|
|
break;
|
|
default:
|
|
printf("Unknown Chip Type\n");
|
|
goto done;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
printf("Unknown Vendor ");
|
|
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");
|
|
|
|
done: ;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
|
|
/* this needs to be inlined, the SWTMRMMILLI register is reset by each read */
|
|
#define __udelay(delay) \
|
|
{ \
|
|
unsigned micro; \
|
|
unsigned milli=0; \
|
|
\
|
|
micro = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); \
|
|
\
|
|
for (;;) { \
|
|
\
|
|
milli += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); \
|
|
micro = *(volatile u16*)(0xfffef000+SC520_SWTMRMICRO); \
|
|
\
|
|
if ((delay) <= (micro + (milli * 1000))) { \
|
|
break; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
static u32 _amd_erase_flash(u32 addr, u32 sector)
|
|
{
|
|
unsigned elapsed;
|
|
|
|
/* Issue erase */
|
|
*(volatile u32*)(addr + 0x5554) = 0xAAAAAAAA;
|
|
*(volatile u32*)(addr + 0xaaa8) = 0x55555555;
|
|
*(volatile u32*)(addr + 0x5554) = 0x80808080;
|
|
/* And one unlock */
|
|
*(volatile u32*)(addr + 0x5554) = 0xAAAAAAAA;
|
|
*(volatile u32*)(addr + 0xaaa8) = 0x55555555;
|
|
/* Sector erase command comes last */
|
|
*(volatile u32*)(addr + sector) = 0x30303030;
|
|
|
|
elapsed = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); /* dummy read */
|
|
elapsed = 0;
|
|
__udelay(50);
|
|
while (((*(volatile u32*)(addr + sector)) & 0x80808080) != 0x80808080) {
|
|
|
|
elapsed += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI);
|
|
if (elapsed > ((CFG_FLASH_ERASE_TOUT/CFG_HZ) * 1000)) {
|
|
*(volatile u32*)(addr) = 0xf0f0f0f0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
*(volatile u32*)(addr) = 0xf0f0f0f0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern int _amd_erase_flash_end;
|
|
asm ("_amd_erase_flash_end:\n"
|
|
".long 0\n");
|
|
|
|
int flash_erase(flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
u32 (*_erase_flash_ptr)(u32 a, u32 so);
|
|
int prot;
|
|
int sect;
|
|
unsigned size;
|
|
|
|
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_VENDMASK) == (AMD_MANUFACT & FLASH_VENDMASK)) {
|
|
size = (unsigned)&_amd_erase_flash_end - (unsigned)_amd_erase_flash;
|
|
|
|
if (size > PROBE_BUFFER_SIZE) {
|
|
printf("_amd_erase_flash() routine too large (%d) %p - %p\n",
|
|
size, &_amd_erase_flash_end, _amd_erase_flash);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(buffer, _amd_erase_flash, size);
|
|
_erase_flash_ptr = (void*)buffer;
|
|
|
|
} else {
|
|
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");
|
|
}
|
|
|
|
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect<=s_last; sect++) {
|
|
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
int res;
|
|
int flag;
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
res = _erase_flash_ptr(info->start[0], info->start[sect]-info->start[0]);
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag) {
|
|
enable_interrupts();
|
|
}
|
|
|
|
|
|
if (res) {
|
|
printf("Erase timed out, sector %d\n", sect);
|
|
return res;
|
|
}
|
|
|
|
putc('.');
|
|
}
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a word to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int _amd_write_word(unsigned start, unsigned dest, unsigned data)
|
|
{
|
|
volatile u32 *addr2 = (u32*)start;
|
|
volatile u32 *dest2 = (u32*)dest;
|
|
volatile u32 *data2 = (u32*)&data;
|
|
unsigned elapsed;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*((volatile u32*)dest) & (u32)data) != (u32)data) {
|
|
return 2;
|
|
}
|
|
|
|
addr2[0x5554] = 0xAAAAAAAA;
|
|
addr2[0xaaa8] = 0x55555555;
|
|
addr2[0x5554] = 0xA0A0A0A0;
|
|
|
|
dest2[0] = data;
|
|
|
|
elapsed = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); /* dummy read */
|
|
elapsed = 0;
|
|
|
|
/* data polling for D7 */
|
|
while ((dest2[0] & 0x80808080) != (data2[0] & 0x80808080)) {
|
|
elapsed += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI);
|
|
if (elapsed > ((CFG_FLASH_WRITE_TOUT/CFG_HZ) * 1000)) {
|
|
addr2[0] = 0xf0f0f0f0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
|
|
addr2[0] = 0xf0f0f0f0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern int _amd_write_word_end;
|
|
asm ("_amd_write_word_end:\n"
|
|
".long 0\n");
|
|
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Copy memory to flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
* 3 - Unsupported flash type
|
|
*/
|
|
|
|
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
|
|
{
|
|
ulong cp, wp, data;
|
|
int i, l, rc;
|
|
int flag;
|
|
u32 (*_write_word_ptr)(unsigned start, unsigned dest, unsigned data);
|
|
unsigned size;
|
|
|
|
if ((info->flash_id & FLASH_VENDMASK) == (AMD_MANUFACT & FLASH_VENDMASK)) {
|
|
size = (unsigned)&_amd_write_word_end - (unsigned)_amd_write_word;
|
|
|
|
if (size > PROBE_BUFFER_SIZE) {
|
|
printf("_amd_write_word() routine too large (%d) %p - %p\n",
|
|
size, &_amd_write_word_end, _amd_write_word);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(buffer, _amd_write_word, size);
|
|
_write_word_ptr = (void*)buffer;
|
|
|
|
} else {
|
|
printf ("Can't program unknown flash type - aborted\n");
|
|
return 3;
|
|
}
|
|
|
|
|
|
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 |= (*(uchar *)cp) << (8*i);
|
|
}
|
|
for (; i<4 && cnt>0; ++i) {
|
|
data |= *src++ << (8*i);
|
|
--cnt;
|
|
++cp;
|
|
}
|
|
for (; cnt==0 && i<4; ++i, ++cp) {
|
|
data |= (*(uchar *)cp) << (8*i);
|
|
}
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
rc = _write_word_ptr(info->start[0], wp, data);
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag) {
|
|
enable_interrupts();
|
|
}
|
|
if (rc != 0) {
|
|
return rc;
|
|
}
|
|
wp += 4;
|
|
}
|
|
|
|
/*
|
|
* handle word aligned part
|
|
*/
|
|
while (cnt >= 4) {
|
|
data = 0;
|
|
|
|
for (i=0; i<4; ++i) {
|
|
data |= *src++ << (8*i);
|
|
}
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
rc = _write_word_ptr(info->start[0], wp, data);
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag) {
|
|
enable_interrupts();
|
|
}
|
|
if (rc != 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 |= *src++ << (8*i);
|
|
--cnt;
|
|
}
|
|
|
|
for (; i<4; ++i, ++cp) {
|
|
data |= (*(uchar *)cp) << (8*i);
|
|
}
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
rc = _write_word_ptr(info->start[0], wp, data);
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag) {
|
|
enable_interrupts();
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|