u-boot/board/esd/pf5200/flash.c

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/*
* (C) Copyright 2003
* 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>
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
typedef unsigned short FLASH_PORT_WIDTH;
typedef volatile unsigned short FLASH_PORT_WIDTHV;
#define FLASH_ID_MASK 0x00FF
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
#define FLASH_CYCLE1 0x0555
#define FLASH_CYCLE2 0x0aaa
#define FLASH_ID1 0x00
#define FLASH_ID2 0x01
#define FLASH_ID3 0x0E
#define FLASH_ID4 0x0F
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size(FPWV * addr, flash_info_t * info);
static void flash_reset(flash_info_t * info);
static int write_word_amd(flash_info_t * info, FPWV * dest, FPW data);
static flash_info_t *flash_get_info(ulong base);
/*-----------------------------------------------------------------------
* flash_init()
*
* sets up flash_info and returns size of FLASH (bytes)
*/
unsigned long flash_init(void)
{
unsigned long size = 0;
int i = 0;
extern void flash_preinit(void);
extern void flash_afterinit(uint, ulong, ulong);
ulong flashbase = CONFIG_SYS_FLASH_BASE;
flash_preinit();
/* There is only ONE FLASH device */
memset(&flash_info[i], 0, sizeof(flash_info_t));
flash_info[i].size = flash_get_size((FPW *) flashbase, &flash_info[i]);
size += flash_info[i].size;
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
flash_get_info(CONFIG_SYS_MONITOR_BASE));
#endif
#ifdef CONFIG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
flash_get_info(CONFIG_ENV_ADDR));
#endif
flash_afterinit(i, flash_info[i].start[0], flash_info[i].size);
return size ? size : 1;
}
/*-----------------------------------------------------------------------
*/
static void flash_reset(flash_info_t * info) {
FPWV *base = (FPWV *) (info->start[0]);
/* Put FLASH back in read mode */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
*base = (FPW) 0x00FF00FF; /* Intel Read Mode */
} else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
*base = (FPW) 0x00F000F0; /* AMD Read Mode */
}
}
/*-----------------------------------------------------------------------
*/
static flash_info_t *flash_get_info(ulong base) {
int i;
flash_info_t *info;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
info = &flash_info[i];
if ((info->size) && (info->start[0] <= base)
&& (base <= info->start[0] + info->size - 1)) {
break;
}
}
return (i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info);
}
/*-----------------------------------------------------------------------
*/
void flash_print_info(flash_info_t * info) {
int i;
2005-10-13 14:45:02 +00:00
char *fmt;
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;
default:
printf("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AMLV256U:
fmt = "29LV256M (256 Mbit)\n";
break;
default:
fmt = "Unknown Chip Type\n";
break;
}
printf(fmt);
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) {
ulong size;
int erased;
ulong *flash = (unsigned long *)info->start[i];
if ((i % 5) == 0) {
printf("\n ");
}
/*
* Check if whole sector is erased
*/
size =
(i !=
(info->sector_count - 1)) ? (info->start[i + 1] -
info->start[i]) >> 2 : (info->
start
[0] +
info->
size -
info->
start
[i])
>> 2;
for (flash = (unsigned long *)info->start[i], erased = 1;
(flash != (unsigned long *)info->start[i] + size)
&& erased; flash++) {
erased = *flash == ~0x0UL;
}
printf(" %08lX %s %s", info->start[i], erased ? "E" : " ",
info->protect[i] ? "(RO)" : " ");
}
printf("\n");
}
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
ulong flash_get_size(FPWV * addr, flash_info_t * info) {
int i;
/* Write auto select command: read Manufacturer ID */
/* Write auto select command sequence and test FLASH answer */
addr[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */
addr[FLASH_CYCLE2] = (FPW) 0x00550055; /* for AMD, Intel ignores this */
addr[FLASH_CYCLE1] = (FPW) 0x00900090; /* selects Intel or AMD */
/* The manufacturer codes are only 1 byte, so just use 1 byte. */
/* This works for any bus width and any FLASH device width. */
udelay(100);
switch (addr[FLASH_ID1] & 0x00ff) {
case (uchar) AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
default:
printf("unknown vendor=%x ", addr[FLASH_ID1] & 0xff);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}
/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
if (info->flash_id != FLASH_UNKNOWN) {
switch ((FPW) addr[FLASH_ID2]) {
case (FPW) AMD_ID_MIRROR:
/* MIRROR BIT FLASH, read more ID bytes */
if ((FPW) addr[FLASH_ID3] == (FPW) AMD_ID_LV256U_2
&& (FPW) addr[FLASH_ID4] == (FPW) AMD_ID_LV256U_3) {
/* attention: only the first 16 MB will be used in u-boot */
info->flash_id += FLASH_AMLV256U;
info->sector_count = 512;
info->size = 0x02000000;
for (i = 0; i < info->sector_count; i++) {
info->start[i] =
(ulong) addr + 0x10000 * i;
}
break;
}
/* fall thru to here ! */
default:
printf("unknown AMD device=%x %x %x",
(FPW) addr[FLASH_ID2], (FPW) addr[FLASH_ID3],
(FPW) addr[FLASH_ID4]);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0x800000;
break;
}
/* Put FLASH back in read mode */
flash_reset(info);
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase(flash_info_t * info, int s_first, int s_last) {
FPWV *addr;
int flag, prot, sect;
int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
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;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AMLV256U:
break;
case FLASH_UNKNOWN:
default:
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");
}
last = get_timer(0);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last && rcode == 0; sect++) {
if (info->protect[sect] != 0) { /* protected, skip it */
continue;
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr = (FPWV *) (info->start[sect]);
if (intel) {
*addr = (FPW) 0x00500050; /* clear status register */
*addr = (FPW) 0x00200020; /* erase setup */
*addr = (FPW) 0x00D000D0; /* erase confirm */
} else {
/* must be AMD style if not Intel */
FPWV *base; /* first address in bank */
base = (FPWV *) (info->start[0]);
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
base[FLASH_CYCLE1] = (FPW) 0x00800080; /* erase mode */
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
*addr = (FPW) 0x00300030; /* erase sector */
}
/* re-enable interrupts if necessary */
if (flag) {
enable_interrupts();
}
start = get_timer(0);
/* wait at least 50us for AMD, 80us for Intel. */
/* Let's wait 1 ms. */
udelay(1000);
while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf("Timeout\n");
if (intel) {
/* suspend erase */
*addr = (FPW) 0x00B000B0;
}
flash_reset(info); /* reset to read mode */
rcode = 1; /* failed */
break;
}
/* show that we're waiting */
if ((get_timer(last)) > CONFIG_SYS_HZ) {
/* every second */
putc('.');
last = get_timer(0);
}
}
/* show that we're waiting */
if ((get_timer(last)) > CONFIG_SYS_HZ) {
/* every second */
putc('.');
last = get_timer(0);
}
flash_reset(info); /* reset to read mode */
}
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)
{
FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
int bytes; /* number of bytes to program in current word */
int left; /* number of bytes left to program */
int i, res;
for (left = cnt, res = 0;
left > 0 && res == 0;
addr += sizeof(data), left -= sizeof(data) - bytes) {
bytes = addr & (sizeof(data) - 1);
addr &= ~(sizeof(data) - 1);
/* combine source and destination data so can program
* an entire word of 16 or 32 bits
*/
for (i = 0; i < sizeof(data); i++) {
data <<= 8;
if (i < bytes || i - bytes >= left)
data += *((uchar *) addr + i);
else
data += *src++;
}
/* write one word to the flash */
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_AMD:
res = write_word_amd(info, (FPWV *) addr, data);
break;
default:
/* unknown flash type, error! */
printf("missing or unknown FLASH type\n");
res = 1; /* not really a timeout, but gives error */
break;
}
}
return (res);
}
/*-----------------------------------------------------------------------
* Write a word to Flash for AMD FLASH
* A word is 16 or 32 bits, whichever the bus width of the flash bank
* (not an individual chip) is.
*
* returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word_amd(flash_info_t * info, FPWV * dest, FPW data) {
ulong start;
int flag;
int res = 0; /* result, assume success */
FPWV *base; /* first address in flash bank */
/* Check if Flash is (sufficiently) erased */
if ((*dest & data) != data) {
return (2);
}
base = (FPWV *) (info->start[0]);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
base[FLASH_CYCLE1] = (FPW) 0x00A000A0; /* selects program mode */
*dest = data; /* start programming the data */
/* re-enable interrupts if necessary */
if (flag) {
enable_interrupts();
}
start = get_timer(0);
/* data polling for D7 */
while (res == 0
&& (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
*dest = (FPW) 0x00F000F0; /* reset bank */
res = 1;
}
}
return (res);
}