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uboot-1.1.4-kirkwood/board/rsdproto/flash.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

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/*
* (C) Copyright 2000
* Marius Groeger <mgroeger@sysgo.de>
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Flash Routines for AM290[48]0B devices
*
*--------------------------------------------------------------------
* 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 <mpc8xx.h>
/* flash hardware ids */
#define VENDOR_AMD 0x0001
#define AMD_29DL323C_B 0x2253
/* Define this to include autoselect sequence in flash_init(). Does NOT
* work when executing from flash itself, so this should be turned
* on only when debugging the RAM version.
*/
#undef WITH_AUTOSELECT
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
#if 1
#define D(x)
#else
#define D(x) printf x
#endif
/*-----------------------------------------------------------------------
* Functions
*/
static unsigned char write_ull(flash_info_t *info,
unsigned long address,
volatile unsigned long long data);
/* from flash_asm.S */
extern void ull_write(unsigned long long volatile *address,
unsigned long long volatile *data);
extern void ull_read(unsigned long long volatile *address,
unsigned long long volatile *data);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
int i;
ulong addr;
#ifdef WITH_AUTOSELECT
{
unsigned long long *f_addr = (unsigned long long *)PHYS_FLASH;
unsigned long long f_command, vendor, device;
/* Perform Autoselect */
f_command = 0x00AA00AA00AA00AAULL;
ull_write(&f_addr[0x555], &f_command);
f_command = 0x0055005500550055ULL;
ull_write(&f_addr[0x2AA], &f_command);
f_command = 0x0090009000900090ULL;
ull_write(&f_addr[0x555], &f_command);
ull_read(&f_addr[0], &vendor);
vendor &= 0xffff;
ull_read(&f_addr[1], &device);
device &= 0xffff;
f_command = 0x00F000F000F000F0ULL;
ull_write(&f_addr[0x555], &f_command);
if (vendor != VENDOR_AMD || device != AMD_29DL323C_B)
return 0;
}
#endif
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* 1st bank: 8 x 32 KB sectors */
flash_info[0].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
flash_info[0].sector_count = 8;
flash_info[0].size = flash_info[0].sector_count * 32 * 1024;
addr = PHYS_FLASH;
for(i = 0; i < flash_info[0].sector_count; i++) {
flash_info[0].start[i] = addr;
addr += flash_info[0].size / flash_info[0].sector_count;
}
/* 1st bank: 63 x 256 KB sectors */
flash_info[1].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
flash_info[1].sector_count = 63;
flash_info[1].size = flash_info[1].sector_count * 256 * 1024;
for(i = 0; i < flash_info[1].sector_count; i++) {
flash_info[1].start[i] = addr;
addr += flash_info[1].size / flash_info[1].sector_count;
}
/*
* protect monitor and environment sectors
*/
#if CFG_MONITOR_BASE >= PHYS_FLASH
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[1]);
#endif
#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
# ifndef CFG_ENV_SIZE
# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
# endif
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[1]);
#endif
return flash_info[0].size + flash_info[1].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 >> 16) {
case VENDOR_AMD:
printf ("AMD ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case AMD_29DL323C_B:
printf ("AM29DL323CB (32 Mbit)\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;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect, l_sect;
ulong start;
unsigned long long volatile *f_addr;
unsigned long long volatile f_command;
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;
}
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");
}
f_addr = (unsigned long long *)info->start[0];
f_command = 0x00AA00AA00AA00AAULL;
ull_write(&f_addr[0x555], &f_command);
f_command = 0x0055005500550055ULL;
ull_write(&f_addr[0x2AA], &f_command);
f_command = 0x0080008000800080ULL;
ull_write(&f_addr[0x555], &f_command);
f_command = 0x00AA00AA00AA00AAULL;
ull_write(&f_addr[0x555], &f_command);
f_command = 0x0055005500550055ULL;
ull_write(&f_addr[0x2AA], &f_command);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Start erase on unprotected sectors */
for (l_sect = -1, sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
f_addr =
(unsigned long long *)(info->start[sect]);
f_command = 0x0030003000300030ULL;
ull_write(f_addr, &f_command);
l_sect = sect;
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
start = get_timer (0);
do
{
if (get_timer(start) > CFG_FLASH_ERASE_TOUT)
{ /* write reset command, command address is unimportant */
/* this command turns the flash back to read mode */
f_addr =
(unsigned long long *)(info->start[l_sect]);
f_command = 0x00F000F000F000F0ULL;
ull_write(f_addr, &f_command);
printf (" timeout\n");
return 1;
}
} while(*f_addr != 0xFFFFFFFFFFFFFFFFULL);
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)
{
unsigned long cp, wp;
unsigned long long data;
int i, l, rc;
wp = (addr & ~7); /* get lower long long 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<8 && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<8; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_ull(info, wp, data)) != 0) {
return rc;
}
wp += 4;
}
/*
* handle long long aligned part
*/
while (cnt >= 8) {
data = 0;
for (i=0; i<8; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_ull(info, wp, data)) != 0) {
return rc;
}
wp += 8;
cnt -= 8;
}
if (cnt == 0) {
return ERR_OK;
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<8; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return write_ull(info, wp, data);
}
/*---------------------------------------------------------------------------
*
* FUNCTION NAME: write_ull
*
* DESCRIPTION: writes 8 bytes to flash
*
* EXTERNAL EFFECT: nothing
*
* PARAMETERS: 32 bit long pointer to address, 64 bit long pointer to data
*
* RETURNS: 0 if OK, 1 if timeout, 4 if parameter error
*--------------------------------------------------------------------------*/
static unsigned char write_ull(flash_info_t *info,
unsigned long address,
volatile unsigned long long data)
{
static unsigned long long f_command;
static unsigned long long *f_addr;
ulong start;
/* address muss be 8-aligned! */
if (address & 0x7)
return ERR_ALIGN;
f_addr = (unsigned long long *)info->start[0];
f_command = 0x00AA00AA00AA00AAULL;
ull_write(&f_addr[0x555], &f_command);
f_command = 0x0055005500550055ULL;
ull_write(&f_addr[0x2AA], &f_command);
f_command = 0x00A000A000A000A0ULL;
ull_write(&f_addr[0x555], &f_command);
f_addr = (unsigned long long *)address;
f_command = data;
ull_write(f_addr, &f_command);
start = get_timer (0);
do
{
if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
{
/* write reset command, command address is unimportant */
/* this command turns the flash back to read mode */
f_addr = (unsigned long long *)info->start[0];
f_command = 0x00F000F000F000F0ULL;
ull_write(f_addr, &f_command);
return ERR_TIMOUT;
}
} while(*((unsigned long long *)address) != data);
return 0;
}
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