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-rw-r--r--board/esd/apc405/strataflash.c789
1 files changed, 0 insertions, 789 deletions
diff --git a/board/esd/apc405/strataflash.c b/board/esd/apc405/strataflash.c
deleted file mode 100644
index ad7a71d..0000000
--- a/board/esd/apc405/strataflash.c
+++ /dev/null
@@ -1,789 +0,0 @@
-/*
- * (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 */
generated by cgit v1.1 at 2024-12-17 16:44:57 +0000