u-boot/board/integratorcp/flash.c
wdenk 5a95f6fbd2 * Patch by Robin Getz, 13 Oct 2004:
Add standalone application to change SMC91C111 MAC addresses,
  see examples/README.smc91111_eeprom

* Patch by Xiaogeng (Shawn) Jin, 12 Oct 2004:
  Fix Flash support for ARM Integrator CP.
2005-01-12 00:38:03 +00:00

565 lines
13 KiB
C

/*
* (C) Copyright 2004
* Xiaogeng (Shawn) Jin, Agilent Technologies, xiaogeng_jin@agilent.com
*
* (C) Copyright 2001
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* (C) Copyright 2001-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2003
* Texas Instruments, <www.ti.com>
* Kshitij Gupta <Kshitij@ti.com>
*
* 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 <linux/byteorder/swab.h>
#define DEBUG
#define PHYS_FLASH_SECT_SIZE 0x00040000 /* 256 KB sectors (x2) */
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/* Board support for 1 or 2 flash devices */
#define FLASH_PORT_WIDTH32
#undef FLASH_PORT_WIDTH16
#ifdef FLASH_PORT_WIDTH16
#define FLASH_PORT_WIDTH ushort
#define FLASH_PORT_WIDTHV vu_short
#define SWAP(x) __swab16(x)
#else
#define FLASH_PORT_WIDTH ulong
#define FLASH_PORT_WIDTHV vu_long
#define SWAP(x) __swab32(x)
#endif
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
#define mb() __asm__ __volatile__ ("" : : : "memory")
/* Flash Organization Structure */
typedef struct OrgDef {
unsigned int sector_number;
unsigned int sector_size;
} OrgDef;
/* Flash Organizations */
OrgDef OrgIntel_28F256L18T[] = {
{4, 32 * 1024}, /* 4 * 32kBytes sectors */
{255, 128 * 1024}, /* 255 * 128kBytes sectors */
};
/* CP control register base address */
#define CPCR_BASE 0xCB000000
#define CPCR_EXTRABANK 0x8
#define CPCR_FLASHSIZE 0x4
#define CPCR_FLWREN 0x2
#define CPCR_FLVPPEN 0x1
/*-----------------------------------------------------------------------
* Functions
*/
unsigned long flash_init (void);
static ulong flash_get_size (FPW * addr, flash_info_t * info);
static int write_data (flash_info_t * info, ulong dest, FPW data);
static void flash_get_offsets (ulong base, flash_info_t * info);
void inline spin_wheel (void);
void flash_print_info (flash_info_t * info);
void flash_unprotect_sectors (FPWV * addr);
int flash_erase (flash_info_t * info, int s_first, int s_last);
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
int i, nbanks;
ulong size = 0;
vu_long *cpcr = (vu_long *)CPCR_BASE;
/* Check if there is an extra bank of flash */
if (cpcr[1] & CPCR_EXTRABANK)
nbanks = 2;
else
nbanks = 1;
if (nbanks > CFG_MAX_FLASH_BANKS)
nbanks = CFG_MAX_FLASH_BANKS;
/* Enable flash write */
cpcr[1] |= 3;
for (i = 0; i < nbanks; i++) {
flash_get_size ((FPW *)(CFG_FLASH_BASE + size), &flash_info[i]);
flash_get_offsets (CFG_FLASH_BASE + size, &flash_info[i]);
size += flash_info[i].size;
}
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection */
flash_protect (FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
#endif
#ifdef CFG_ENV_IS_IN_FLASH
/* ENV protection ON */
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
&flash_info[0]);
#endif
/* Protect SIB (0x24800000) and bootMonitor (0x24c00000) */
flash_protect (FLAG_PROTECT_SET,
flash_info[0].start[62],
flash_info[0].start[63] + PHYS_FLASH_SECT_SIZE - 1,
&flash_info[0]);
return size;
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t * info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
return;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
info->protect[i] = 0;
}
}
}
/*-----------------------------------------------------------------------
*/
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;
}
/* Integrator CP board uses 28F640J3C or 28F128J3C parts,
* which have the same device id numbers as 28F640J3A or
* 28F128J3A
*/
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F256L18T:
printf ("FLASH 28F256L18T\n");
break;
case FLASH_28F640J3A:
printf ("FLASH 28F640J3C\n");
break;
case FLASH_28F128J3A:
printf ("FLASH 28F128J3C\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 (FPW * addr, flash_info_t * info)
{
volatile FPW value;
vu_long *cpcr = (vu_long *)CPCR_BASE;
int nsects;
/* Check the flash size */
if (cpcr[1] & CPCR_FLASHSIZE)
nsects = 128;
else
nsects = 64;
if (nsects > CFG_MAX_FLASH_SECT)
nsects = CFG_MAX_FLASH_SECT;
/* Write auto select command: read Manufacturer ID */
addr[0x5555] = (FPW) 0x00AA00AA;
addr[0x2AAA] = (FPW) 0x00550055;
addr[0x5555] = (FPW) 0x00900090;
mb ();
value = addr[0];
switch (value) {
case (FPW) INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
return (0); /* no or unknown flash */
}
mb ();
value = addr[1]; /* device ID */
switch (value) {
case (FPW) (INTEL_ID_28F256L18T):
info->flash_id += FLASH_28F256L18T;
info->sector_count = 259;
info->size = 0x02000000;
break; /* => 32 MB */
case (FPW) (INTEL_ID_28F640J3A):
info->flash_id += FLASH_28F640J3A;
info->sector_count = nsects;
info->size = nsects * PHYS_FLASH_SECT_SIZE;
break;
case (FPW) (INTEL_ID_28F128J3A):
info->flash_id += FLASH_28F128J3A;
info->sector_count = nsects;
info->size = nsects * PHYS_FLASH_SECT_SIZE;
break;
default:
info->flash_id = FLASH_UNKNOWN;
break;
}
if (info->sector_count > CFG_MAX_FLASH_SECT) {
printf ("** ERROR: sector count %d > max (%d) **\n",
info->sector_count, CFG_MAX_FLASH_SECT);
info->sector_count = CFG_MAX_FLASH_SECT;
}
addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
return (info->size);
}
/* unprotects a sector for write and erase
* on some intel parts, this unprotects the entire chip, but it
* wont hurt to call this additional times per sector...
*/
void flash_unprotect_sectors (FPWV * addr)
{
FPW status;
*addr = (FPW) 0x00500050; /* clear status register */
/* this sends the clear lock bit command */
*addr = (FPW) 0x00600060;
*addr = (FPW) 0x00D000D0;
reset_timer_masked();
while (((status = *addr) & (FPW)0x00800080) != 0x00800080) {
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
printf("Timeout");
break;
}
}
*addr = (FPW) 0x00FF00FF;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
int flag, prot, sect;
ulong type;
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;
}
type = (info->flash_id & FLASH_VENDMASK);
if ((type != 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 erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
FPWV *addr = (FPWV *) (info->start[sect]);
FPW status;
printf ("Erasing sector %2d ... ", sect);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* flash_unprotect_sectors (addr); */
/* arm simple, non interrupt dependent timer */
reset_timer_masked ();
*addr = (FPW) 0x00500050; /* clear status register */
*addr = (FPW) 0x00200020; /* erase setup */
*addr = (FPW) 0x00D000D0; /* erase confirm */
mb();
udelay(1000); /* Let's wait 1 ms */
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
*addr = (FPW)0x00700070;
status = *addr;
if ((status & (FPW) 0x00400040) == (FPW) 0x00400040) {
/* erase suspended? Resume it */
reset_timer_masked();
*addr = (FPW) 0x00D000D0;
} else {
#ifdef DEBUG
printf ("Timeout,0x%08x\n", status);
#else
printf("Timeout\n");
#endif
*addr = (FPW) 0x00500050;
*addr = (FPW) 0x00FF00FF; /* reset to read mode */
rcode = 1;
break;
}
}
}
*addr = (FPW) 0x00FF00FF; /* resest to read mode */
printf (" done\n");
}
}
return rcode;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 4 - Flash not identified
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp;
FPW data;
int count, i, l, rc, port_width;
if (info->flash_id == FLASH_UNKNOWN) {
return 4;
}
/* get lower word aligned address */
#ifdef FLASH_PORT_WIDTH16
wp = (addr & ~1);
port_width = 2;
#else
wp = (addr & ~3);
port_width = 4;
#endif
/*
* 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 < port_width && cnt > 0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt == 0 && i < port_width; ++i, ++cp) {
data = (data << 8) | (*(uchar *) cp);
}
if ((rc = write_data (info, wp, SWAP (data))) != 0) {
return (rc);
}
wp += port_width;
}
/*
* handle word aligned part
*/
count = 0;
while (cnt >= port_width) {
data = 0;
for (i = 0; i < port_width; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_data (info, wp, SWAP (data))) != 0) {
return (rc);
}
wp += port_width;
cnt -= port_width;
if (count++ > 0x800) {
spin_wheel ();
count = 0;
}
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i < port_width; ++i, ++cp) {
data = (data << 8) | (*(uchar *) cp);
}
return (write_data (info, wp, SWAP (data)));
}
/*-----------------------------------------------------------------------
* Write a word or halfword to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_data (flash_info_t * info, ulong dest, FPW data)
{
FPWV *addr = (FPWV *) dest;
ulong status;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) {
printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* flash_unprotect_sectors (addr); */
*addr = (FPW) 0x00400040; /* write setup */
*addr = data;
mb();
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* arm simple, non interrupt dependent timer */
reset_timer_masked ();
/* wait while polling the status register */
while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
#ifdef DEBUG
*addr = (FPW) 0x00700070;
status = *addr;
printf("## status=0x%08x, addr=0x%08x\n", status, addr);
#endif
*addr = (FPW) 0x00500050; /* clear status register cmd */
*addr = (FPW) 0x00FF00FF; /* restore read mode */
return (1);
}
}
*addr = (FPW) 0x00FF00FF; /* restore read mode */
return (0);
}
void inline spin_wheel (void)
{
static int p = 0;
static char w[] = "\\/-";
printf ("\010%c", w[p]);
(++p == 3) ? (p = 0) : 0;
}