razzor/uboot-1.1.4-kirkwood
1
0
Fork 0
Code
qnap_qts
uboot-1.1.4-kirkwood/board/gen860t/flash.c

645 lines
16 KiB
C
Raw Permalink Normal View History

u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Keith Outwater, keith_outwater@mvsi.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 <mpc8xx.h>
#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
/*
* Use buffered writes to flash by default - they are about 32x faster than
* single byte writes.
*/
#ifndef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
#define CFG_GEN860T_FLASH_USE_WRITE_BUFFER
#endif
/*
* Max time to wait (in mS) for flash device to allocate a write buffer.
*/
#ifndef CFG_FLASH_ALLOC_BUFFER_TOUT
#define CFG_FLASH_ALLOC_BUFFER_TOUT 100
#endif
/*
* These functions support a single Intel StrataFlash device (28F128J3A)
* in byte mode only!. The flash routines are very basic and simple
* since there isn't really any remapping necessary.
*/
/*
* Intel SCS (Scalable Command Set) command definitions
* (taken from 28F128J3A datasheet)
*/
#define SCS_READ_CMD 0xff
#define SCS_READ_ID_CMD 0x90
#define SCS_QUERY_CMD 0x98
#define SCS_READ_STATUS_CMD 0x70
#define SCS_CLEAR_STATUS_CMD 0x50
#define SCS_WRITE_BUF_CMD 0xe8
#define SCS_PROGRAM_CMD 0x40
#define SCS_BLOCK_ERASE_CMD 0x20
#define SCS_BLOCK_ERASE_RESUME_CMD 0xd0
#define SCS_PROGRAM_RESUME_CMD 0xd0
#define SCS_BLOCK_ERASE_SUSPEND_CMD 0xb0
#define SCS_SET_BLOCK_LOCK_CMD 0x60
#define SCS_CLR_BLOCK_LOCK_CMD 0x60
/*
* SCS status/extended status register bit definitions
*/
#define SCS_SR7 0x80
#define SCS_XSR7 0x80
/*---------------------------------------------------------------------*/
#if 0
#define DEBUG_FLASH
#endif
#ifdef DEBUG_FLASH
#define PRINTF(fmt,args...) printf(fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_char *addr, flash_info_t *info);
static int write_data8 (flash_info_t *info, ulong dest, uchar data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*-----------------------------------------------------------------------
* Initialize the flash memory.
*/
unsigned long
flash_init (void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
unsigned long size_b0;
int i;
for (i= 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/*
* The gen860t board only has one FLASH memory device, so the
* FLASH Bank configuration is done statically.
*/
PRINTF("\n## Get flash bank 1 size @ 0x%08x\n", FLASH_BASE0_PRELIM);
size_b0 = flash_get_size((vu_char *)FLASH_BASE0_PRELIM, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0: "
"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
flash_info[0].flash_id,size_b0, size_b0 << 20);
}
PRINTF("## Before remap:\n"
" BR0: 0x%08x OR0: 0x%08x\n BR1: 0x%08x OR1: 0x%08x\n",
memctl->memc_br0, memctl->memc_or0,
memctl->memc_br1, memctl->memc_or1);
/*
* Remap FLASH according to real size
*/
memctl->memc_or0 |= (-size_b0 & 0xFFFF8000);
memctl->memc_br0 |= (CFG_FLASH_BASE & BR_BA_MSK);
PRINTF("## After remap:\n"
" BR0: 0x%08x OR0: 0x%08x\n", memctl->memc_br0, memctl->memc_or0);
/*
* Re-do sizing to get full correct info
*/
size_b0 = flash_get_size ((vu_char *)CFG_FLASH_BASE, &flash_info[0]);
flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
flash_info[0].size = size_b0;
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/*
* Monitor protection is ON by default
*/
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
/*
* Environment protection ON by default
*/
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
&flash_info[0]);
#endif
PRINTF("## Final Flash bank size: 0x%08lx\n",size_b0);
return (size_b0);
}
/*-----------------------------------------------------------------------
* Fill in the FLASH offset table
*/
static void
flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
return;
}
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_INTEL:
for (i = 0; i < info->sector_count; i++) {
info->start[i] = base;
base += 1024 * 128;
}
return;
default:
printf ("Don't know sector offsets for FLASH"
" type 0x%lx\n", info->flash_id);
return;
}
}
/*-----------------------------------------------------------------------
* Display FLASH device info
*/
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_28F128J3A:
printf ("28F128J3A (128Mbit = 128K x 128)\n");
break;
default:
printf ("Unknown Chip Type\n");
break;
}
if (info->size >= (1024 * 1024)) {
i = 20;
} else {
i = 10;
}
printf (" Size: %ld %cB in %d Sectors\n",
info->size >> i,
(i == 20) ? 'M' : 'k',
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;
}
/*-----------------------------------------------------------------------
* Get size and other information for a FLASH device.
* NOTE: The following code cannot be run from FLASH!
*/
static
ulong flash_get_size (vu_char *addr, flash_info_t *info)
{
#define NO_FLASH 0
vu_char value[2];
/*
* Try to read the manufacturer ID
*/
addr[0] = SCS_READ_CMD;
addr[0] = SCS_READ_ID_CMD;
value[0] = addr[0];
value[1] = addr[2];
addr[0] = SCS_READ_CMD;
PRINTF("Manuf. ID @ 0x%08lx: 0x%02x\n", (ulong)addr, value[0]);
switch (value[0]) {
case (INTEL_MANUFACT & 0xff):
info->flash_id = FLASH_MAN_INTEL;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (NO_FLASH);
}
/*
* Read the device ID
*/
PRINTF("Device ID @ 0x%08lx: 0x%02x\n", (ulong)(&addr[2]), value[1]);
switch (value[1]) {
case (INTEL_ID_28F128J3A & 0xff):
info->flash_id += FLASH_28F128J3A;
info->sector_count = 128;
info->size = 16 * 1024 * 1024;
break;
default:
info->flash_id = FLASH_UNKNOWN;
return (NO_FLASH);
}
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;
}
return (info->size);
}
/*-----------------------------------------------------------------------
* Erase the specified sectors in the specified FLASH device
*/
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 erase only Intel flash types - 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");
}
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_char *addr = (uchar *)(info->start[sect]);
vu_char status;
/*
* Disable interrupts which might cause a timeout
*/
flag = disable_interrupts();
*addr = SCS_CLEAR_STATUS_CMD;
*addr = SCS_BLOCK_ERASE_CMD;
*addr = SCS_BLOCK_ERASE_RESUME_CMD;
/*
* Re-enable interrupts if necessary
*/
if (flag)
enable_interrupts();
/*
* Wait at least 80us - let's wait 1 ms
*/
udelay (1000);
while (((status = *addr) & SCS_SR7) != SCS_SR7) {
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
*addr = SCS_BLOCK_ERASE_SUSPEND_CMD;
*addr = SCS_READ_CMD;
return 1;
}
/*
* Show that we're waiting
*/
if ((now - last) > 1000) { /* 1 second */
putc ('.');
last = now;
}
}
*addr = SCS_READ_CMD;
}
}
printf (" done\n");
return 0;
}
#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
/*
* Allocate a flash buffer, fill it with data and write it to the flash.
* 0 - OK
* 1 - Timeout on buffer request
*
* NOTE: After the last call to this function, WSM status needs to be checked!
*/
static int
write_flash_buffer8(flash_info_t *info_p, vu_char *src_p, vu_char *dest_p,
uint count)
{
vu_char *block_addr_p = NULL;
vu_char *start_addr_p = NULL;
ulong blocksize = info_p->size / (ulong)info_p->sector_count;
int i;
uint time = get_timer(0);
PRINTF("%s:%d: src: 0x%p dest: 0x%p count: %d\n",
__FUNCTION__, __LINE__, src_p, dest_p, count);
/*
* What block are we in? We already know that the source address is
* in the flash address range, but we also can't cross a block boundary.
* We assume that the block does not cross a boundary (we'll check before
* calling this function).
*/
for (i = 0; i < info_p->sector_count; ++i) {
if ( ((ulong)dest_p >= info_p->start[i]) &&
((ulong)dest_p < (info_p->start[i] + blocksize)) ) {
PRINTF("%s:%d: Dest addr 0x%p is in block %d @ 0x%.8lx\n",
__FUNCTION__, __LINE__, dest_p, i, info_p->start[i]);
block_addr_p = (vu_char *)info_p->start[i];
break;
}
}
/*
* Request a buffer
*/
*block_addr_p = SCS_WRITE_BUF_CMD;
while ((*block_addr_p & SCS_XSR7) != SCS_XSR7) {
if (get_timer(time) > CFG_FLASH_ALLOC_BUFFER_TOUT) {
PRINTF("%s:%d: Buffer allocation timeout @ 0x%p (waited %d mS)\n",
__FUNCTION__, __LINE__, block_addr_p,
CFG_FLASH_ALLOC_BUFFER_TOUT);
return 1;
}
*block_addr_p = SCS_WRITE_BUF_CMD;
}
/*
* Fill the buffer with data
*/
start_addr_p = dest_p;
*block_addr_p = count - 1; /* flash device wants count - 1 */
PRINTF("%s:%d: Fill buffer at block addr 0x%p\n",
__FUNCTION__, __LINE__, block_addr_p);
for (i = 0; i < count; i++) {
*start_addr_p++ = *src_p++;
}
/*
* Flush buffer to flash
*/
*block_addr_p = SCS_PROGRAM_RESUME_CMD;
#if 1
time = get_timer(0);
while ((*block_addr_p & SCS_SR7) != SCS_SR7) {
if (get_timer(time) > CFG_FLASH_WRITE_TOUT) {
PRINTF("%s:%d: Write timeout @ 0x%p (waited %d mS)\n",
__FUNCTION__, __LINE__, block_addr_p, CFG_FLASH_WRITE_TOUT);
return 1;
}
}
#endif
return 0;
}
#endif
/*-----------------------------------------------------------------------
* 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_p, uchar *src_p, ulong addr, ulong count)
{
int rc = 0;
#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
#define FLASH_WRITE_BUF_SIZE 0x00000020 /* 32 bytes */
int i;
uint bufs;
ulong buf_count;
vu_char *sp;
vu_char *dp;
#else
ulong wp;
#endif
PRINTF("\n%s:%d: src: 0x%.8lx dest: 0x%.8lx size: %d (0x%.8lx)\n",
__FUNCTION__, __LINE__, (ulong)src_p, addr, (uint)count, count);
if (info_p->flash_id == FLASH_UNKNOWN) {
return 4;
}
#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
sp = src_p;
dp = (uchar *)addr;
/*
* For maximum performance, we want to align the start address to
* the beginning of a write buffer boundary (i.e. A4-A0 of the
* start address = 0). See how many bytes are required to get to a
* write-buffer-aligned address. If that number is non-zero, do
* non buffered writes of the non-aligned data. By doing non-buffered
* writes, we avoid the problem of crossing a block (sector) boundary
* with buffered writes.
*/
buf_count = FLASH_WRITE_BUF_SIZE - (addr & (FLASH_WRITE_BUF_SIZE - 1));
if (buf_count == FLASH_WRITE_BUF_SIZE) { /* already on a boundary */
buf_count = 0;
}
if (buf_count > count) { /* not a full buffers worth of data to write */
buf_count = count;
}
count -= buf_count;
PRINTF("%s:%d: Write buffer alignment count = %ld\n",
__FUNCTION__, __LINE__, buf_count);
while (buf_count-- >= 1) {
if ((rc = write_data8(info_p, (ulong)dp++, *sp++)) != 0) {
return (rc);
}
}
PRINTF("%s:%d: count = %ld\n", __FUNCTION__, __LINE__, count);
if (count == 0) { /* all done */
PRINTF("%s:%d: Less than 1 buffer (%d) worth of bytes\n",
__FUNCTION__, __LINE__, FLASH_WRITE_BUF_SIZE);
return (rc);
}
/*
* Now that we are write buffer aligned, write full or partial buffers.
* The fact that we are write buffer aligned automatically avoids
* crossing a block address during a write buffer operation.
*/
bufs = count / FLASH_WRITE_BUF_SIZE;
PRINTF("%s:%d: %d (0x%x) buffers to write\n", __FUNCTION__, __LINE__,
bufs, bufs);
while (bufs >= 1) {
rc = write_flash_buffer8(info_p, sp, dp, FLASH_WRITE_BUF_SIZE);
if (rc != 0) {
PRINTF("%s:%d: ** Error writing buf %d\n",
__FUNCTION__, __LINE__, bufs);
return (rc);
}
bufs--;
sp += FLASH_WRITE_BUF_SIZE;
dp += FLASH_WRITE_BUF_SIZE;
}
/*
* Do the leftovers
*/
i = count % FLASH_WRITE_BUF_SIZE;
PRINTF("%s:%d: %d (0x%x) leftover bytes\n", __FUNCTION__, __LINE__, i, i);
if (i > 0) {
rc = write_flash_buffer8(info_p, sp, dp, i);
}
sp = (vu_char*)info_p->start[0];
*sp = SCS_READ_CMD;
return (rc);
#else
wp = addr;
while (count-- >= 1) {
if((rc = write_data8(info_p, wp++, *src_p++)) != 0)
return (rc);
}
return 0;
#endif
}
/*-----------------------------------------------------------------------
* Write a byte to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int
write_data8 (flash_info_t *info, ulong dest, uchar data)
{
vu_char *addr = (vu_char *)dest;
vu_char status;
ulong start;
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();
*addr = SCS_PROGRAM_CMD;
*addr = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
start = get_timer (0);
while (((status = *addr) & SCS_SR7) != SCS_SR7) {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
*addr = SCS_READ_CMD;
return (1);
}
}
*addr = SCS_READ_CMD;
return (0);
}
/* vim: set ts=4 sw=4 tw=78: */
Copy Permalink