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u-boot/board/snmc/qs850/flash.c

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/*
* (C) Copyright 2003
* MuLogic B.V.
*
* (C) Copyright 2001
* 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 <asm/ppc4xx.h>
#include <asm/u-boot.h>
#include <asm/processor.h>
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
#define FLASH_WORD_SIZE unsigned long
#define FLASH_ID_MASK 0xFFFFFFFF
/*-----------------------------------------------------------------------
* Functions
*/
/* stolen from esteem192e/flash.c */
ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned long size_b0, size_b1;
int i;
uint pbcr;
unsigned long base_b0, base_b1;
volatile FLASH_WORD_SIZE* flash_base;
/* Init: no FLASHes known */
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Static FLASH Bank configuration here */
/* Test for 8M Flash first */
debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM);
flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM);
size_b0 = flash_get_size(flash_base, &flash_info[0]);
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);
return 0;
}
if (size_b0 < 8*1024*1024) {
/* Not quite 8M, try 4M Flash base address */
debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM);
flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM);
size_b0 = flash_get_size(flash_base, &flash_info[0]);
}
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);
return 0;
}
/* Only one bank */
if (CONFIG_SYS_MAX_FLASH_BANKS == 1) {
/* Setup offsets */
flash_get_offsets ((ulong)flash_base, &flash_info[0]);
/* Monitor protection ON by default */
(void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]);
size_b1 = 0 ;
flash_info[0].size = size_b0;
return(size_b0);
}
/* We have 2 banks */
size_b1 = flash_get_size(flash_base, &flash_info[1]);
/* Re-do sizing to get full correct info */
if (size_b1) {
mtdcr(EBC0_CFGADDR, PB0CR);
pbcr = mfdcr(EBC0_CFGDATA);
mtdcr(EBC0_CFGADDR, PB0CR);
base_b1 = -size_b1;
pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
mtdcr(EBC0_CFGDATA, pbcr);
}
if (size_b0) {
mtdcr(EBC0_CFGADDR, PB1CR);
pbcr = mfdcr(EBC0_CFGDATA);
mtdcr(EBC0_CFGADDR, PB1CR);
base_b0 = base_b1 - size_b0;
pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
mtdcr(EBC0_CFGDATA, pbcr);
}
size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
flash_get_offsets (base_b0, &flash_info[0]);
/* monitor protection ON by default */
(void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]);
if (size_b1) {
/* Re-do sizing to get full correct info */
size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
flash_get_offsets (base_b1, &flash_info[1]);
/* monitor protection ON by default */
(void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CONFIG_SYS_MONITOR_LEN,
base_b1+size_b1-1, &flash_info[1]);
/* monitor protection OFF by default (one is enough) */
(void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CONFIG_SYS_MONITOR_LEN,
base_b0+size_b0-1, &flash_info[0]);
} else {
flash_info[1].flash_id = FLASH_UNKNOWN;
flash_info[1].sector_count = -1;
}
flash_info[0].size = size_b0;
flash_info[1].size = size_b1;
return (size_b0 + size_b1);
}
/*-----------------------------------------------------------------------
This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
long large_sect_size;
long small_sect_size;
/* set up sector start adress table */
large_sect_size = info->size / (info->sector_count - 8 + 1);
small_sect_size = large_sect_size / 8;
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
for (i = 0; i < 7; i++) {
info->start[i] = base;
base += small_sect_size;
}
for (; i < info->sector_count; i++) {
info->start[i] = base;
base += large_sect_size;
}
}
else
{
/* set sector offsets for top boot block type */
for (i = 0; i < (info->sector_count - 8); i++) {
info->start[i] = base;
base += large_sect_size;
}
for (; i < info->sector_count; i++) {
info->start[i] = base;
base += small_sect_size;
}
}
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t *info)
{
int i;
uchar *boottype;
uchar botboot[]=", bottom boot sect)\n";
uchar topboot[]=", top boot sector)\n";
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;
case FLASH_MAN_SST:
printf ("SST ");
break;
case FLASH_MAN_STM:
printf ("STM ");
break;
case FLASH_MAN_INTEL:
printf ("INTEL ");
break;
default:
printf ("Unknown Vendor ");
break;
}
if (info->flash_id & 0x0001 ) {
boottype = botboot;
} else {
boottype = topboot;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM160B:
printf ("AM29LV160B (16 Mbit%s",boottype);
break;
case FLASH_AM160T:
printf ("AM29LV160T (16 Mbit%s",boottype);
break;
case FLASH_AMDL163T:
printf ("AM29DL163T (16 Mbit%s",boottype);
break;
case FLASH_AMDL163B:
printf ("AM29DL163B (16 Mbit%s",boottype);
break;
case FLASH_AM320B:
printf ("AM29LV320B (32 Mbit%s",boottype);
break;
case FLASH_AM320T:
printf ("AM29LV320T (32 Mbit%s",boottype);
break;
case FLASH_AMDL323T:
printf ("AM29DL323T (32 Mbit%s",boottype);
break;
case FLASH_AMDL323B:
printf ("AM29DL323B (32 Mbit%s",boottype);
break;
case FLASH_AMDL322T:
printf ("AM29DL322T (32 Mbit%s",boottype);
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!
*/
ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
{
short i;
ulong base = (ulong)addr;
FLASH_WORD_SIZE value;
/* Write auto select command: read Manufacturer ID */
/*
* Note: if it is an AMD flash and the word at addr[0000]
* is 0x00890089 this routine will think it is an Intel
* flash device and may(most likely) cause trouble.
*/
addr[0x0000] = 0x00900090;
if(addr[0x0000] != 0x00890089){
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
addr[0x0555] = 0x00900090;
}
value = addr[0];
switch (value) {
case (AMD_MANUFACT & FLASH_ID_MASK):
info->flash_id = FLASH_MAN_AMD;
break;
case (FUJ_MANUFACT & FLASH_ID_MASK):
info->flash_id = FLASH_MAN_FUJ;
break;
case (STM_MANUFACT & FLASH_ID_MASK):
info->flash_id = FLASH_MAN_STM;
break;
case (SST_MANUFACT & FLASH_ID_MASK):
info->flash_id = FLASH_MAN_SST;
break;
case (INTEL_MANUFACT & FLASH_ID_MASK):
info->flash_id = FLASH_MAN_INTEL;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = addr[1]; /* device ID */
switch (value) {
case (AMD_ID_LV160T & FLASH_ID_MASK):
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_LV160B & FLASH_ID_MASK):
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_DL163T & FLASH_ID_MASK):
info->flash_id += FLASH_AMDL163T;
info->sector_count = 39;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_DL163B & FLASH_ID_MASK):
info->flash_id += FLASH_AMDL163B;
info->sector_count = 39;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_DL323T & FLASH_ID_MASK):
info->flash_id += FLASH_AMDL323T;
info->sector_count = 71;
info->size = 0x00800000;
break; /* => 8 MB */
case (AMD_ID_DL323B & FLASH_ID_MASK):
info->flash_id += FLASH_AMDL323B;
info->sector_count = 71;
info->size = 0x00800000;
break; /* => 8 MB */
case (AMD_ID_DL322T & FLASH_ID_MASK):
info->flash_id += FLASH_AMDL322T;
info->sector_count = 71;
info->size = 0x00800000;
break; /* => 8 MB */
default:
/* FIXME*/
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
flash_get_offsets(base, info);
/* 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 FLASH_WORD_SIZE *)(info->start[i]);
info->protect[i] = addr[2] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (volatile FLASH_WORD_SIZE *)info->start[0];
*addr = (0x00FF00FF & FLASH_ID_MASK); /* reset bank */
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, last;
int rcode = 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;
}
if ((info->flash_id == FLASH_UNKNOWN) ||
(info->flash_id > FLASH_AMD_COMP) ) {
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");
}
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 = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
addr[0] = (0x00300030 & FLASH_ID_MASK);
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 = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
(0x00800080&FLASH_ID_MASK) )
{
if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
serial_putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (volatile FLASH_WORD_SIZE *)info->start[0];
addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
printf (" done\n");
return rcode;
}
/*-----------------------------------------------------------------------
* 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 l;
int i, 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();
/* AMD stuff */
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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
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