/*
* (C) Copyright 2001
* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
*
* 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
*/
/*
* flash.c - flash support for the 512k, 8bit boot flash on the GEVB
* most of this file was based on the existing U-Boot
* flash drivers.
*/
#include <common.h>
#include <mpc8xx.h>
#include <galileo/gt64260R.h>
#include <galileo/memory.h>
#include "intel_flash.h"
#define FLASH_ROM 0xFFFD /* unknown flash type */
#define FLASH_RAM 0xFFFE /* unknown flash type */
#define FLASH_MAN_UNKNOWN 0xFFFF0000
/* #define DEBUG */
/* #define FLASH_ID_OVERRIDE */ /* Hack to set type to 040B if ROM emulator is installed.
* Can be used to program a ROM in circuit if a programmer
* is not available by swapping the rom out. */
/* Intel flash commands */
int flash_erase_intel(flash_info_t *info, int s_first, int s_last);
int write_word_intel(bank_addr_t addr, bank_word_t value);
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (int portwidth, vu_long *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 int i;
unsigned long size_b0 = 0, size_b1 = 0;
unsigned long base, flash_size;
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* the boot flash */
base = CFG_FLASH_BASE;
size_b0 = flash_get_size(1, (vu_long *)base, &flash_info[0]);
printf("[%ldkB@%lx] ", size_b0/1024, base);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
base, size_b0, size_b0<<20);
}
base = memoryGetDeviceBaseAddress(CFG_EXTRA_FLASH_DEVICE);
for(i=1;i<CFG_MAX_FLASH_BANKS;i++) {
unsigned long size = flash_get_size(CFG_EXTRA_FLASH_WIDTH, (vu_long *)base, &flash_info[i]);
printf("[%ldMB@%lx] ", size>>20, base);
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
if(i==1) {
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
base, size_b1, size_b1<<20);
}
break;
}
size_b1+=size;
base+=size;
}
flash_size = size_b0 + size_b1;
return flash_size;
}
/*-----------------------------------------------------------------------
*/
static void
flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
int sector_size;
if(!info->sector_count) return;
/* set up sector start address table */
switch(info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM040:
case FLASH_28F128J3A:
case FLASH_28F640J3A:
case FLASH_RAM:
/* this chip has uniformly spaced sectors */
sector_size=info->size/info->sector_count;
for (i = 0; i < info->sector_count; i++)
info->start[i] = base + (i * sector_size);
break;
default:
if (info->flash_id & FLASH_BTYPE) {
/* 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;
}
} else {
/* 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;
}
}
}
}
/*-----------------------------------------------------------------------
*/
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;
case FLASH_MAN_INTEL: printf ("INTEL "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM040:
printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
break;
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_AM160B:
printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
break;
case FLASH_AM160T:
printf ("AM29LV160T (16 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;
case FLASH_28F640J3A:
printf ("28F640J3A (64 Mbit)\n");
break;
case FLASH_28F128J3A:
printf ("28F128J3A (128 Mbit)\n");
break;
case FLASH_ROM:
printf ("ROM\n");
break;
case FLASH_RAM:
printf ("RAM\n");
break;
default:
printf ("Unknown Chip Type\n");
break;
}
puts (" Size: ");
print_size (info->size, "");
printf (" in %d Sectors\n", 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 inline void flash_cmd(int width, volatile unsigned char *addr, int offset, unsigned char cmd)
{
/* supports 1x8, 1x16, and 2x16 */
/* 2x8 and 4x8 are not supported */
if(width==4) {
/* assuming chips are in 16 bit mode */
/* 2x16 */
unsigned long cmd32=(cmd<<16)|cmd;
*(volatile unsigned long *)(addr+offset*2)=cmd32;
} else {
/* 1x16 or 1x8 */
*(volatile unsigned char *)(addr+offset)=cmd;
}
}
static ulong
flash_get_size (int portwidth, vu_long *addr, flash_info_t *info)
{
short i;
volatile unsigned char *caddr = (unsigned char *)addr;
volatile unsigned short *saddr = (unsigned short *)addr;
volatile unsigned long *laddr = (unsigned long *)addr;
char old[2], save;
ulong id, manu, base = (ulong)addr;
info->portwidth=portwidth;
save = *caddr;
flash_cmd(portwidth,caddr,0,0xf0);
flash_cmd(portwidth,caddr,0,0xf0);
udelay(10);
old[0] = caddr[0];
old[1] = caddr[1];
if(old[0]!=0xf0) {
flash_cmd(portwidth,caddr,0,0xf0);
flash_cmd(portwidth,caddr,0,0xf0);
udelay(10);
if(*caddr==0xf0) {
/* this area is ROM */
*caddr=save;
#ifndef FLASH_ID_OVERRIDE
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
#else
info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
info->sector_count = 8;
info->size = 0x80000;
info->chipwidth=1;
#endif
flash_get_offsets(base, info);
return info->size;
}
} else {
*caddr=0;
udelay(10);
if(*caddr==0) {
/* this area is RAM */
*caddr=save;
info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
flash_get_offsets(base, info);
return info->size;
}
flash_cmd(portwidth,caddr,0,0xf0);
udelay(10);
}
/* Write auto select command: read Manufacturer ID */
flash_cmd(portwidth,caddr,0x555,0xAA);
flash_cmd(portwidth,caddr,0x2AA,0x55);
flash_cmd(portwidth,caddr,0x555,0x90);
udelay(10);
if ((caddr[0] == old[0]) &&
(caddr[1] == old[1])) {
/* this area is ROM */
#ifndef FLASH_ID_OVERRIDE
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
#else
info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
info->sector_count = 8;
info->size = 0x80000;
info->chipwidth=1;
#endif
flash_get_offsets(base, info);
return info->size;
#ifdef DEBUG
} else {
printf("%px%d: %02x:%02x -> %02x:%02x\n",
caddr, portwidth, old[0], old[1],
caddr[0], caddr[1]);
#endif
}
switch(portwidth) {
case 1:
manu = caddr[0];
manu |= manu<<16;
id = caddr[1];
break;
case 2:
manu = saddr[0];
manu |= manu<<16;
id = saddr[1];
id |= id<<16;
break;
case 4:
manu = laddr[0];
id = laddr[1];
break;
default:
id = manu = -1;
break;
}
#ifdef DEBUG
printf("\n%08lx:%08lx:%08lx\n", base, manu, id);
printf("%08lx %08lx %08lx %08lx\n",
laddr[0],laddr[1],laddr[2],laddr[3]);
#endif
switch (manu) {
case AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
info->flash_id = FLASH_MAN_FUJ;
break;
case INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
break;
default:
printf("Unknown Mfr [%08lx]:%08lx\n", manu, id);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
switch (id) {
case AMD_ID_LV400T:
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
info->chipwidth=1;
break; /* => 1 MB */
case AMD_ID_LV400B:
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
info->chipwidth=1;
break; /* => 1 MB */
case AMD_ID_LV800T:
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
info->chipwidth=1;
break; /* => 2 MB */
case AMD_ID_LV800B:
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00200000;
info->chipwidth=1;
break; /* => 2 MB */
case AMD_ID_LV160T:
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
info->chipwidth=1;
break; /* => 4 MB */
case AMD_ID_LV160B:
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
info->chipwidth=1;
break; /* => 4 MB */
#if 0 /* enable when device IDs are available */
case AMD_ID_LV320T:
info->flash_id += FLASH_AM320T;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
case AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
#endif
case AMD_ID_LV040B:
info->flash_id += FLASH_AM040;
info->sector_count = 8;
info->size = 0x80000;
info->chipwidth=1;
break;
case INTEL_ID_28F640J3A:
info->flash_id += FLASH_28F640J3A;
info->sector_count = 64;
info->size = 128*1024 * 64; /* 128kbytes x 64 blocks */
info->chipwidth=2;
if(portwidth==4) info->size*=2; /* 2x16 */
break;
case INTEL_ID_28F128J3A:
info->flash_id += FLASH_28F128J3A;
info->sector_count = 128;
info->size = 128*1024 * 128; /* 128kbytes x 128 blocks */
info->chipwidth=2;
if(portwidth==4) info->size*=2; /* 2x16 */
break;
default:
printf("Unknown id %lx:[%lx]\n", manu, id);
info->flash_id = FLASH_UNKNOWN;
info->chipwidth=1;
return (0); /* => no or unknown flash */
}
flash_get_offsets(base, info);
#if 0
/* set up sector start address table */
if (info->flash_id & FLASH_AM040) {
/* this chip has uniformly spaced sectors */
for (i = 0; i < info->sector_count; i++)
info->start[i] = base + (i * 0x00010000);
} else if (info->flash_id & FLASH_BTYPE) {
/* 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;
}
} else {
/* 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;
}
}
#endif
/* 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 */
caddr = (volatile unsigned char *)(info->start[i]);
saddr = (volatile unsigned short *)(info->start[i]);
laddr = (volatile unsigned long *)(info->start[i]);
if(portwidth==1)
info->protect[i] = caddr[2] & 1;
else if(portwidth==2)
info->protect[i] = saddr[2] & 1;
else
info->protect[i] = laddr[2] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
caddr = (volatile unsigned char *)info->start[0];
flash_cmd(portwidth,caddr,0,0xF0); /* reset bank */
}
return (info->size);
}
/* TODO: 2x16 unsupported */
int
flash_erase (flash_info_t *info, int s_first, int s_last)
{
volatile unsigned char *addr = (char *)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, last;
/* TODO: 2x16 unsupported */
if(info->portwidth==4) return 1;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
for (sect = s_first; sect<=s_last; sect++) {
int sector_size=info->size/info->sector_count;
addr = (char *)(info->start[sect]);
memset((void *)addr, 0, sector_size);
}
return 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_VENDMASK) == FLASH_MAN_INTEL) {
return flash_erase_intel(info,
(unsigned short)s_first,
(unsigned short)s_last);
}
#if 0
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;
}
#endif
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();
flash_cmd(info->portwidth,addr,0x555,0xAA);
flash_cmd(info->portwidth,addr,0x2AA,0x55);
flash_cmd(info->portwidth,addr,0x555,0x80);
flash_cmd(info->portwidth,addr,0x555,0xAA);
flash_cmd(info->portwidth,addr,0x2AA,0x55);
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (char *)(info->start[sect]);
flash_cmd(info->portwidth,addr,0,0x30);
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 unsigned char *)(info->start[l_sect]);
/* broken for 2x16: TODO */
while ((addr[0] & 0x80) != 0x80) {
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 char *)info->start[0];
flash_cmd(info->portwidth,addr,0,0xf0);
flash_cmd(info->portwidth,addr,0,0xf0);
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
/* broken for 2x16: TODO */
int
write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
if(info->portwidth==4) return 1;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 0;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
memcpy((void *)addr, src, cnt);
return 0;
}
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
*/
/* broken for 2x16: TODO */
static int
write_word (flash_info_t *info, ulong dest, ulong data)
{
volatile unsigned char *addr = (char *)(info->start[0]);
ulong start;
int flag, i;
if(info->portwidth==4) return 1;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
*(unsigned long *)dest=data;
return 0;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
unsigned short low = data & 0xffff;
unsigned short hi = (data >> 16) & 0xffff;
int ret = write_word_intel((bank_addr_t)dest, hi);
if (!ret) ret = write_word_intel((bank_addr_t)(dest+2), low);
return ret;
}
/* 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();
/* first, perform an unlock bypass command to speed up flash writes */
addr[0x555] = 0xAA;
addr[0x2AA] = 0x55;
addr[0x555] = 0x20;
/* write each byte out */
for (i = 0; i < 4; i++) {
char *data_ch = (char *)&data;
addr[0] = 0xA0;
*(((char *)dest)+i) = data_ch[i];
udelay(10); /* XXX */
}
/* we're done, now do an unlock bypass reset */
addr[0] = 0x90;
addr[0] = 0x00;
/* 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);
}
