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u-boot/board/esd/apc405/strataflash.c
wdenk efe2a4d5cf Code cleanup.
2004-12-16 21:44:03 +00:00

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/*
* (C) Copyright 2002
* Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.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 <asm/processor.h>
#undef DEBUG_FLASH
/*
* This file implements a Common Flash Interface (CFI) driver for ppcboot.
* The width of the port and the width of the chips are determined at initialization.
* These widths are used to calculate the address for access CFI data structures.
* It has been tested on an Intel Strataflash implementation.
*
* References
* JEDEC Standard JESD68 - Common Flash Interface (CFI)
* JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
* Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
* Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
*
* TODO
* Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
* Add support for other command sets Use the PRI and ALT to determine command set
* Verify erase and program timeouts.
*/
#define FLASH_CMD_CFI 0x98
#define FLASH_CMD_READ_ID 0x90
#define FLASH_CMD_RESET 0xff
#define FLASH_CMD_BLOCK_ERASE 0x20
#define FLASH_CMD_ERASE_CONFIRM 0xD0
#define FLASH_CMD_WRITE 0x40
#define FLASH_CMD_PROTECT 0x60
#define FLASH_CMD_PROTECT_SET 0x01
#define FLASH_CMD_PROTECT_CLEAR 0xD0
#define FLASH_CMD_CLEAR_STATUS 0x50
#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
#define FLASH_STATUS_DONE 0x80
#define FLASH_STATUS_ESS 0x40
#define FLASH_STATUS_ECLBS 0x20
#define FLASH_STATUS_PSLBS 0x10
#define FLASH_STATUS_VPENS 0x08
#define FLASH_STATUS_PSS 0x04
#define FLASH_STATUS_DPS 0x02
#define FLASH_STATUS_R 0x01
#define FLASH_STATUS_PROTECT 0x01
#define FLASH_OFFSET_CFI 0x55
#define FLASH_OFFSET_CFI_RESP 0x10
#define FLASH_OFFSET_WTOUT 0x1F
#define FLASH_OFFSET_WBTOUT 0x20
#define FLASH_OFFSET_ETOUT 0x21
#define FLASH_OFFSET_CETOUT 0x22
#define FLASH_OFFSET_WMAX_TOUT 0x23
#define FLASH_OFFSET_WBMAX_TOUT 0x24
#define FLASH_OFFSET_EMAX_TOUT 0x25
#define FLASH_OFFSET_CEMAX_TOUT 0x26
#define FLASH_OFFSET_SIZE 0x27
#define FLASH_OFFSET_INTERFACE 0x28
#define FLASH_OFFSET_BUFFER_SIZE 0x2A
#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
#define FLASH_OFFSET_ERASE_REGIONS 0x2D
#define FLASH_OFFSET_PROTECT 0x02
#define FLASH_OFFSET_USER_PROTECTION 0x85
#define FLASH_OFFSET_INTEL_PROTECTION 0x81
#define FLASH_MAN_CFI 0x01000000
typedef union {
unsigned char c;
unsigned short w;
unsigned long l;
} cfiword_t;
typedef union {
unsigned char * cp;
unsigned short *wp;
unsigned long *lp;
} cfiptr_t;
#define NUM_ERASE_REGIONS 4
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c);
static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf);
static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd);
static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd);
static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd);
static int flash_detect_cfi(flash_info_t * info);
static ulong flash_get_size (ulong base, int banknum);
static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword);
static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt);
#ifdef CFG_FLASH_USE_BUFFER_WRITE
static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len);
#endif
/*-----------------------------------------------------------------------
* create an address based on the offset and the port width
*/
inline uchar * flash_make_addr(flash_info_t * info, int sect, int offset)
{
return ((uchar *)(info->start[sect] + (offset * info->portwidth)));
}
/*-----------------------------------------------------------------------
* read a character at a port width address
*/
inline uchar flash_read_uchar(flash_info_t * info, uchar offset)
{
uchar *cp;
cp = flash_make_addr(info, 0, offset);
return (cp[info->portwidth - 1]);
}
/*-----------------------------------------------------------------------
* read a short word by swapping for ppc format.
*/
ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset)
{
uchar * addr;
addr = flash_make_addr(info, sect, offset);
return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]);
}
/*-----------------------------------------------------------------------
* read a long word by picking the least significant byte of each maiximum
* port size word. Swap for ppc format.
*/
ulong flash_read_long(flash_info_t * info, int sect, uchar offset)
{
uchar * addr;
addr = flash_make_addr(info, sect, offset);
return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) |
(addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]);
}
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned long size;
int i;
unsigned long address;
/* The flash is positioned back to back, with the demultiplexing of the chip
* based on the A24 address line.
*
*/
address = CFG_FLASH_BASE;
size = 0;
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
size += flash_info[i].size = flash_get_size(address, i);
address += CFG_FLASH_INCREMENT;
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i,
flash_info[0].size, flash_info[i].size<<20);
}
}
#if 0 /* test-only */
/* Monitor protection ON by default */
#if (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
for(i=0; flash_info[0].start[i] < CFG_MONITOR_BASE+CFG_MONITOR_LEN-1; i++)
(void)flash_real_protect(&flash_info[0], i, 1);
#endif
#else
/* monitor protection ON by default */
flash_protect (FLAG_PROTECT_SET,
- CFG_MONITOR_LEN,
- 1, &flash_info[1]);
#endif
return (size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int rcode = 0;
int prot;
int sect;
if( info->flash_id != FLASH_MAN_CFI) {
printf ("Can't erase unknown flash type - aborted\n");
return 1;
}
if ((s_first < 0) || (s_first > s_last)) {
printf ("- no sectors to erase\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");
}
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE);
flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) {
rcode = 1;
} else
printf(".");
}
}
printf (" done\n");
return rcode;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t *info)
{
int i;
if (info->flash_id != FLASH_MAN_CFI) {
printf ("missing or unknown FLASH type\n");
return;
}
printf("CFI conformant FLASH (%d x %d)",
(info->portwidth << 3 ), (info->chipwidth << 3 ));
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
printf (" Sector Start Addresses:");
for (i=0; i<info->sector_count; ++i) {
#ifdef CFG_FLASH_EMPTY_INFO
int k;
int size;
int erased;
volatile unsigned long *flash;
/*
* Check if whole sector is erased
*/
if (i != (info->sector_count-1))
size = info->start[i+1] - info->start[i];
else
size = info->start[0] + info->size - info->start[i];
erased = 1;
flash = (volatile unsigned long *)info->start[i];
size = size >> 2; /* divide by 4 for longword access */
for (k=0; k<size; k++)
{
if (*flash++ != 0xffffffff)
{
erased = 0;
break;
}
}
if ((i % 5) == 0)
printf ("\n ");
/* print empty and read-only info */
printf (" %08lX%s%s",
info->start[i],
erased ? " E" : " ",
info->protect[i] ? "RO " : " ");
#else
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s",
info->start[i],
info->protect[i] ? " (RO)" : " ");
#endif
}
printf ("\n");
return;
}
/*-----------------------------------------------------------------------
* 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 wp;
ulong cp;
int aln;
cfiword_t cword;
int i, rc;
/* get lower aligned address */
wp = (addr & ~(info->portwidth - 1));
/* handle unaligned start */
if((aln = addr - wp) != 0) {
cword.l = 0;
cp = wp;
for(i=0;i<aln; ++i, ++cp)
flash_add_byte(info, &cword, (*(uchar *)cp));
for(; (i< info->portwidth) && (cnt > 0) ; i++) {
flash_add_byte(info, &cword, *src++);
cnt--;
cp++;
}
for(; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
flash_add_byte(info, &cword, (*(uchar *)cp));
if((rc = flash_write_cfiword(info, wp, cword)) != 0)
return rc;
wp = cp;
}
#ifdef CFG_FLASH_USE_BUFFER_WRITE
while(cnt >= info->portwidth) {
i = info->buffer_size > cnt? cnt: info->buffer_size;
if((rc = flash_write_cfibuffer(info, wp, src,i)) != ERR_OK)
return rc;
wp += i;
src += i;
cnt -=i;
}
#else
/* handle the aligned part */
while(cnt >= info->portwidth) {
cword.l = 0;
for(i = 0; i < info->portwidth; i++) {
flash_add_byte(info, &cword, *src++);
}
if((rc = flash_write_cfiword(info, wp, cword)) != 0)
return rc;
wp += info->portwidth;
cnt -= info->portwidth;
}
#endif /* CFG_FLASH_USE_BUFFER_WRITE */
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
cword.l = 0;
for (i=0, cp=wp; (i<info->portwidth) && (cnt>0); ++i, ++cp) {
flash_add_byte(info, &cword, *src++);
--cnt;
}
for (; i<info->portwidth; ++i, ++cp) {
flash_add_byte(info, & cword, (*(uchar *)cp));
}
return flash_write_cfiword(info, wp, cword);
}
/*-----------------------------------------------------------------------
*/
int flash_real_protect(flash_info_t *info, long sector, int prot)
{
int retcode = 0;
flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
if(prot)
flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET);
else
flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
if((retcode = flash_full_status_check(info, sector, info->erase_blk_tout,
prot?"protect":"unprotect")) == 0) {
info->protect[sector] = prot;
/* Intel's unprotect unprotects all locking */
if(prot == 0) {
int i;
for(i = 0 ; i<info->sector_count; i++) {
if(info->protect[i])
flash_real_protect(info, i, 1);
}
}
}
return retcode;
}
/*-----------------------------------------------------------------------
* wait for XSR.7 to be set. Time out with an error if it does not.
* This routine does not set the flash to read-array mode.
*/
static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
{
ulong start;
/* Wait for command completion */
start = get_timer (0);
while(!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) {
if (get_timer(start) > info->erase_blk_tout) {
printf("Flash %s timeout at address %lx\n", prompt, info->start[sector]);
flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
return ERR_TIMOUT;
}
}
return ERR_OK;
}
/*-----------------------------------------------------------------------
* Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
* This routine sets the flash to read-array mode.
*/
static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
{
int retcode;
retcode = flash_status_check(info, sector, tout, prompt);
if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) {
retcode = ERR_INVAL;
printf("Flash %s error at address %lx\n", prompt,info->start[sector]);
if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){
printf("Command Sequence Error.\n");
} else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){
printf("Block Erase Error.\n");
retcode = ERR_NOT_ERASED;
} else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) {
printf("Locking Error\n");
}
if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){
printf("Block locked.\n");
retcode = ERR_PROTECTED;
}
if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
printf("Vpp Low Error.\n");
}
flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
return retcode;
}
/*-----------------------------------------------------------------------
*/
static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c)
{
switch(info->portwidth) {
case FLASH_CFI_8BIT:
cword->c = c;
break;
case FLASH_CFI_16BIT:
cword->w = (cword->w << 8) | c;
break;
case FLASH_CFI_32BIT:
cword->l = (cword->l << 8) | c;
}
}
/*-----------------------------------------------------------------------
* make a proper sized command based on the port and chip widths
*/
static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf)
{
int i;
uchar *cp = (uchar *)cmdbuf;
for(i=0; i< info->portwidth; i++)
*cp++ = ((i+1) % info->chipwidth) ? '\0':cmd;
}
/*
* Write a proper sized command to the correct address
*/
static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd)
{
volatile cfiptr_t addr;
cfiword_t cword;
addr.cp = flash_make_addr(info, sect, offset);
flash_make_cmd(info, cmd, &cword);
switch(info->portwidth) {
case FLASH_CFI_8BIT:
*addr.cp = cword.c;
break;
case FLASH_CFI_16BIT:
*addr.wp = cword.w;
break;
case FLASH_CFI_32BIT:
*addr.lp = cword.l;
break;
}
}
/*-----------------------------------------------------------------------
*/
static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
int retval;
cptr.cp = flash_make_addr(info, sect, offset);
flash_make_cmd(info, cmd, &cword);
switch(info->portwidth) {
case FLASH_CFI_8BIT:
retval = (cptr.cp[0] == cword.c);
break;
case FLASH_CFI_16BIT:
retval = (cptr.wp[0] == cword.w);
break;
case FLASH_CFI_32BIT:
retval = (cptr.lp[0] == cword.l);
break;
default:
retval = 0;
break;
}
return retval;
}
/*-----------------------------------------------------------------------
*/
static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
int retval;
cptr.cp = flash_make_addr(info, sect, offset);
flash_make_cmd(info, cmd, &cword);
switch(info->portwidth) {
case FLASH_CFI_8BIT:
retval = ((cptr.cp[0] & cword.c) == cword.c);
break;
case FLASH_CFI_16BIT:
retval = ((cptr.wp[0] & cword.w) == cword.w);
break;
case FLASH_CFI_32BIT:
retval = ((cptr.lp[0] & cword.l) == cword.l);
break;
default:
retval = 0;
break;
}
return retval;
}
/*-----------------------------------------------------------------------
* detect if flash is compatible with the Common Flash Interface (CFI)
* http://www.jedec.org/download/search/jesd68.pdf
*
*/
static int flash_detect_cfi(flash_info_t * info)
{
for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_32BIT;
info->portwidth <<= 1) {
for(info->chipwidth =FLASH_CFI_BY8;
info->chipwidth <= info->portwidth;
info->chipwidth <<= 1) {
flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
flash_write_cmd(info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
if(flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP,'Q') &&
flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y'))
return 1;
}
}
return 0;
}
/*
* The following code cannot be run from FLASH!
*
*/
static ulong flash_get_size (ulong base, int banknum)
{
flash_info_t * info = &flash_info[banknum];
int i, j;
int sect_cnt;
unsigned long sector;
unsigned long tmp;
int size_ratio;
uchar num_erase_regions;
int erase_region_size;
int erase_region_count;
info->start[0] = base;
if(flash_detect_cfi(info)){
#ifdef DEBUG_FLASH
printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */
#endif
size_ratio = info->portwidth / info->chipwidth;
num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS);
#ifdef DEBUG_FLASH
printf("found %d erase regions\n", num_erase_regions);
#endif
sect_cnt = 0;
sector = base;
for(i = 0 ; i < num_erase_regions; i++) {
if(i > NUM_ERASE_REGIONS) {
printf("%d erase regions found, only %d used\n",
num_erase_regions, NUM_ERASE_REGIONS);
break;
}
tmp = flash_read_long(info, 0, FLASH_OFFSET_ERASE_REGIONS);
erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128;
tmp >>= 16;
erase_region_count = (tmp & 0xffff) +1;
for(j = 0; j< erase_region_count; j++) {
info->start[sect_cnt] = sector;
sector += (erase_region_size * size_ratio);
info->protect[sect_cnt] = flash_isset(info, sect_cnt, FLASH_OFFSET_PROTECT, FLASH_STATUS_PROTECT);
sect_cnt++;
}
}
info->sector_count = sect_cnt;
/* multiply the size by the number of chips */
info->size = (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * size_ratio;
info->buffer_size = (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE));
tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT);
info->erase_blk_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT)));
tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT);
info->buffer_write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT)));
tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT);
info->write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT)))/ 1000;
info->flash_id = FLASH_MAN_CFI;
}
flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
return(info->size);
}
/*-----------------------------------------------------------------------
*/
static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
{
cfiptr_t ctladdr;
cfiptr_t cptr;
int flag;
ctladdr.cp = flash_make_addr(info, 0, 0);
cptr.cp = (uchar *)dest;
/* Check if Flash is (sufficiently) erased */
switch(info->portwidth) {
case FLASH_CFI_8BIT:
flag = ((cptr.cp[0] & cword.c) == cword.c);
break;
case FLASH_CFI_16BIT:
flag = ((cptr.wp[0] & cword.w) == cword.w);
break;
case FLASH_CFI_32BIT:
flag = ((cptr.lp[0] & cword.l) == cword.l);
break;
default:
return 2;
}
if(!flag)
return 2;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE);
switch(info->portwidth) {
case FLASH_CFI_8BIT:
cptr.cp[0] = cword.c;
break;
case FLASH_CFI_16BIT:
cptr.wp[0] = cword.w;
break;
case FLASH_CFI_32BIT:
cptr.lp[0] = cword.l;
break;
}
/* re-enable interrupts if necessary */
if(flag)
enable_interrupts();
return flash_full_status_check(info, 0, info->write_tout, "write");
}
#ifdef CFG_FLASH_USE_BUFFER_WRITE
/* loop through the sectors from the highest address
* when the passed address is greater or equal to the sector address
* we have a match
*/
static int find_sector(flash_info_t *info, ulong addr)
{
int sector;
for(sector = info->sector_count - 1; sector >= 0; sector--) {
if(addr >= info->start[sector])
break;
}
return sector;
}
static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len)
{
int sector;
int cnt;
int retcode;
volatile cfiptr_t src;
volatile cfiptr_t dst;
src.cp = cp;
dst.cp = (uchar *)dest;
sector = find_sector(info, dest);
flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
if((retcode = flash_status_check(info, sector, info->buffer_write_tout,
"write to buffer")) == ERR_OK) {
switch(info->portwidth) {
case FLASH_CFI_8BIT:
cnt = len;
break;
case FLASH_CFI_16BIT:
cnt = len >> 1;
break;
case FLASH_CFI_32BIT:
cnt = len >> 2;
break;
default:
return ERR_INVAL;
break;
}
flash_write_cmd(info, sector, 0, (uchar)cnt-1);
while(cnt-- > 0) {
switch(info->portwidth) {
case FLASH_CFI_8BIT:
*dst.cp++ = *src.cp++;
break;
case FLASH_CFI_16BIT:
*dst.wp++ = *src.wp++;
break;
case FLASH_CFI_32BIT:
*dst.lp++ = *src.lp++;
break;
default:
return ERR_INVAL;
break;
}
}
flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM);
retcode = flash_full_status_check(info, sector, info->buffer_write_tout,
"buffer write");
}
flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
return retcode;
}
#endif /* CFG_USE_FLASH_BUFFER_WRITE */
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