/*
* (C) Copyright 2000
* 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 <mpc8xx.h>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
#if defined(CFG_ENV_IS_IN_FLASH)
# ifndef CFG_ENV_ADDR
# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef CFG_ENV_SIZE
# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
# endif
# ifndef CFG_ENV_SECT_SIZE
# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
# endif
#endif
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (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)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE;
unsigned long size;
int i;
/* Init: enable write,
* or we cannot even write flash commands
*/
bcsr->bd_ctrl |= BD_CTRL_FLWE;
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Static FLASH Bank configuration here - FIXME XXX */
size = flash_get_size((vu_long *)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, size<<20);
}
/* Remap FLASH according to real size */
memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) |
(memctl->memc_br1 & ~(BR_BA_MSK));
/* Re-do sizing to get full correct info */
size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
flash_info[0].size = size;
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
&flash_info[0]);
#endif
#ifdef CFG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
&flash_info[0]);
#endif
return (size);
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
/* all possible flash types
* (28F016SV, 28F160S3, 28F320S3)
* have the same erase block size: 64 kB per chip,
* of 128 kB per bank
*/
/* set up sector start address table */
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
base += 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_INTEL: printf ("Intel "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
break;
case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
break;
case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\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;
}
/*-----------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
ulong value;
ulong base = (ulong)addr;
/* Write "Intelligent Identifier" command: read Manufacturer ID */
*addr = 0x90909090;
value = addr[0];
switch (value) {
case (MT_MANUFACT & 0x00FF00FF): /* MT or => Intel */
case (INTEL_ALT_MANU & 0x00FF00FF):
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 (INTEL_ID_28F016S):
info->flash_id += FLASH_28F016SV;
info->sector_count = 32;
info->size = 0x00400000;
break; /* => 2x2 MB */
case (INTEL_ID_28F160S3):
info->flash_id += FLASH_28F160S3;
info->sector_count = 32;
info->size = 0x00400000;
break; /* => 2x2 MB */
case (INTEL_ID_28F320S3):
info->flash_id += FLASH_28F320S3;
info->sector_count = 64;
info->size = 0x00800000;
break; /* => 2x4 MB */
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
/* set up sector start address table */
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000);
/* don't know how to check sector protection */
info->protect[i] = 0;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (vu_long *)info->start[0];
*addr = 0xFFFFFF; /* reset bank to read array mode */
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
ulong start, now, last;
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) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
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 = get_timer (0);
last = start;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
vu_long *addr = (vu_long *)(info->start[sect]);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Single Block Erase Command */
*addr = 0x20202020;
/* Confirm */
*addr = 0xD0D0D0D0;
/* Resume Command, as per errata update */
*addr = 0xD0D0D0D0;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
while ((*addr & 0x00800080) != 0x00800080) {
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = 0xFFFFFFFF; /* reset bank */
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
/* reset to read mode */
*addr = 0xFFFFFFFF;
}
}
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)
{
ulong cp, wp, data;
int i, l, 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 *)dest;
ulong start, csr;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Write Command */
*addr = 0x10101010;
/* Write Data */
*addr = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
flag = 0;
while (((csr = *addr) & 0x00800080) != 0x00800080) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
flag = 1;
break;
}
}
if (csr & 0x00400040) {
printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
flag = 1;
}
/* Clear Status Registers Command */
*addr = 0x50505050;
/* Reset to read array mode */
*addr = 0xFFFFFFFF;
return (flag);
}
/*-----------------------------------------------------------------------
*/
