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-rw-r--r--board/mpc8540eval/flash.c894
1 files changed, 0 insertions, 894 deletions
diff --git a/board/mpc8540eval/flash.c b/board/mpc8540eval/flash.c
deleted file mode 100644
index 9df5bd9a4c0..00000000000
--- a/board/mpc8540eval/flash.c
+++ /dev/null
@@ -1,894 +0,0 @@
-/*
- * (C) Copyright 2003 Motorola Inc.
- * Xianghua Xiao,(X.Xiao@motorola.com)
- *
- * (C) Copyright 2000, 2001
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
- * Add support the Sharp chips on the mpc8260ads.
- * I started with board/ip860/flash.c and made changes I found in
- * the MTD project by David Schleef.
- *
- * 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>
-
-#if !defined(CONFIG_SYS_NO_FLASH)
-
-flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
-
-#if defined(CONFIG_ENV_IS_IN_FLASH)
-# ifndef CONFIG_ENV_ADDR
-# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
-# endif
-# ifndef CONFIG_ENV_SIZE
-# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
-# endif
-# ifndef CONFIG_ENV_SECT_SIZE
-# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
-# endif
-#endif
-
-/*
- * The variable should be in the flash info structure. Since it
- * is only used in this board specific file it is declared here.
- * In the future I think an endian flag should be part of the
- * flash_info_t structure. (Ron Alder)
- */
-static ulong big_endian = 0;
-
-/*-----------------------------------------------------------------------
- * Functions
- */
-static ulong flash_get_size (vu_long *addr, flash_info_t *info);
-static int write_block (flash_info_t *info, uchar * src, ulong dest, ulong cnt);
-static int write_short (flash_info_t *info, ulong dest, ushort data);
-static int write_word (flash_info_t *info, ulong dest, ulong data);
-static int clear_block_lock_bit(flash_info_t *info, vu_long * addr);
-/*-----------------------------------------------------------------------
- */
-
-unsigned long flash_init (void)
-{
- unsigned long size;
- int i;
-
- /* Init: enable write,
- * or we cannot even write flash commands
- */
- for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
- flash_info[i].flash_id = FLASH_UNKNOWN;
-
- /* set the default sector offset */
- }
-
- /* Static FLASH Bank configuration here - FIXME XXX */
-
- size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
-
- if (flash_info[0].flash_id == FLASH_UNKNOWN) {
- printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
- size, size<<20);
- }
-
- /* Re-do sizing to get full correct info */
- size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
-
- flash_info[0].size = size;
-
-#if !defined(CONFIG_RAM_AS_FLASH)
-#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_info[0]);
-#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_SECT_SIZE-1,
- &flash_info[0]);
-#endif
-#endif
- return (size);
-}
-
-/*-----------------------------------------------------------------------
- */
-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;
- case FLASH_MAN_SHARP: printf ("Sharp "); break;
- default: printf ("Unknown Vendor "); break;
- }
-
- switch (info->flash_id & FLASH_TYPEMASK) {
- case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
- break;
- case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
- break;
- case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
- break;
- case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
- break;
- case FLASH_28F640J3A: printf ("28F640J3A (64 Mbit, 64 x 128K)\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");
-}
-
- /* only deal with 16 bit and 32 bit port width, 16bit chip */
-static ulong flash_get_size (vu_long *addr, flash_info_t *info)
-{
- short i;
- ulong value,va,vb,vc,vd;
- ulong base = (ulong)addr;
- ulong sector_offset;
-
-#ifdef DEBUG
- printf("Check flash at 0x%08x\n",(uint)addr);
-#endif
- /* Write "Intelligent Identifier" command: read Manufacturer ID */
- *addr = 0x90909090;
- udelay(20);
- asm("sync");
-
-#ifndef CONFIG_SYS_FLASH_CFI
- printf("Not define CONFIG_SYS_FLASH_CFI\n");
- return (0);
-#else
- value = addr[0];
- va=(value & 0xFF000000)>>24;
- vb=(value & 0x00FF0000)>>16;
- vc=(value & 0x0000FF00)>>8;
- vd=(value & 0x000000FF);
- if ((va==0) && (vb==0)) {
- printf("cannot identify Flash\n");
- info->flash_id = FLASH_UNKNOWN;
- info->sector_count = 0;
- info->size = 0;
- return (0); /* no or unknown flash */
- }
- else if ((va==0) && (vb!=0)) {
- big_endian = 1;
- info->chipwidth = FLASH_CFI_BY16;
- if(vb == vd) info->portwidth = FLASH_CFI_32BIT;
- else info->portwidth = FLASH_CFI_16BIT;
- }
- else if ((va!=0) && (vb==0)) {
- big_endian = 0;
- info->chipwidth = FLASH_CFI_BY16;
- if(va == vc) info->portwidth = FLASH_CFI_32BIT;
- else info->portwidth = FLASH_CFI_16BIT;
- }
- else if ((va!=0) && (vb!=0)) {
- big_endian = 1; /* no meaning for 8bit chip */
- info->chipwidth = FLASH_CFI_BY8;
- if(va == vb) info->portwidth = FLASH_CFI_16BIT;
- else info->portwidth = FLASH_CFI_8BIT;
- }
-#ifdef DEBUG
- switch (info->portwidth) {
- case FLASH_CFI_8BIT:
- printf("port width is 8 bit.\n");
- break;
- case FLASH_CFI_16BIT:
- printf("port width is 16 bit, ");
- break;
- case FLASH_CFI_32BIT:
- printf("port width is 32 bit, ");
- break;
- }
- switch (info->chipwidth) {
- case FLASH_CFI_BY16:
- printf("chip width is 16 bit, ");
- switch (big_endian) {
- case 0:
- printf("Little Endian.\n");
- break;
- case 1:
- printf("Big Endian.\n");
- break;
- }
- break;
- }
-#endif
-#endif /*#ifdef CONFIG_SYS_FLASH_CFI*/
-
- if (big_endian==0) value = (addr[0] & 0xFF000000) >>8;
- else value = (addr[0] & 0x00FF0000);
-#ifdef DEBUG
- printf("manufacturer=0x%x\n",(uint)(value>>16));
-#endif
- switch (value) {
- case MT_MANUFACT & 0xFFFF0000: /* SHARP, MT or => Intel */
- case INTEL_ALT_MANU & 0xFFFF0000:
- info->flash_id = FLASH_MAN_INTEL;
- break;
- default:
- printf("unknown manufacturer: %x\n", (unsigned int)value);
- info->flash_id = FLASH_UNKNOWN;
- info->sector_count = 0;
- info->size = 0;
- return (0); /* no or unknown flash */
- }
-
- if (info->portwidth==FLASH_CFI_16BIT) {
- switch (big_endian) {
- case 0:
- value = (addr[0] & 0x0000FF00)>>8;
- break;
- case 1:
- value = (addr[0] & 0x000000FF);
- break;
- }
- }
- else if (info->portwidth == FLASH_CFI_32BIT) {
- switch (big_endian) {
- case 0:
- value = (addr[1] & 0x0000FF00)>>8;
- break;
- case 1:
- value = (addr[1] & 0x000000FF);
- break;
- }
- }
-
-#ifdef DEBUG
- printf("deviceID=0x%x\n",(uint)value);
-#endif
- switch (value) {
- case (INTEL_ID_28F016S & 0x0000FFFF):
- info->flash_id += FLASH_28F016SV;
- info->sector_count = 32;
- sector_offset = 0x10000;
- break; /* => 2 MB */
-
- case (INTEL_ID_28F160S3 & 0x0000FFFF):
- info->flash_id += FLASH_28F160S3;
- info->sector_count = 32;
- sector_offset = 0x10000;
- break; /* => 2 MB */
-
- case (INTEL_ID_28F320S3 & 0x0000FFFF):
- info->flash_id += FLASH_28F320S3;
- info->sector_count = 64;
- sector_offset = 0x10000;
- break; /* => 4 MB */
-
- case (INTEL_ID_28F640J3A & 0x0000FFFF):
- info->flash_id += FLASH_28F640J3A;
- info->sector_count = 64;
- sector_offset = 0x20000;
- break; /* => 8 MB */
-
- case SHARP_ID_28F016SCL & 0x0000FFFF:
- case SHARP_ID_28F016SCZ & 0x0000FFFF:
- info->flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
- info->sector_count = 32;
- sector_offset = 0x10000;
- break; /* => 2 MB */
-
-
- default:
- info->flash_id = FLASH_UNKNOWN;
- return (0); /* => no or unknown flash */
-
- }
-
- sector_offset = sector_offset * (info->portwidth / info->chipwidth);
- info->size = info->sector_count * sector_offset;
-
- /* set up sector start address table */
- for (i = 0; i < info->sector_count; i++) {
- info->start[i] = base;
- base += sector_offset;
- /* don't know how to check sector protection */
- info->protect[i] = 0;
- }
-
- /*
- * Prevent writes to uninitialized FLASH.
- */
- if (info->flash_id != FLASH_UNKNOWN) {
- addr = (vu_long *)info->start[0];
- *addr = 0xFFFFFF; /* reset bank to read array mode */
- asm("sync");
- }
-
- return (info->size);
-}
-
-
-/*-----------------------------------------------------------------------
- */
-
-int flash_erase (flash_info_t *info, int s_first, int s_last)
-{
- int flag, prot, sect;
- ulong start, now, last, ready, erase_err_status;
-
- if (big_endian == 1) {
- ready = 0x0080;
- erase_err_status = 0x00a0;
- }
- else {
- ready = 0x8000;
- erase_err_status = 0xa000;
- }
- if ((info->portwidth / info->chipwidth)==2) {
- ready += (ready <<16);
- erase_err_status += (erase_err_status <<16);
- }
-
-#ifdef DEBUG
- printf ("\nReady flag is 0x%lx\nErase error flag is 0x%lx", ready, erase_err_status);
-#endif
-
- 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)
- && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
- 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");
- }
-
-#ifdef DEBUG
- printf("\nFlash Erase:\n");
-#endif
- /* Make Sure Block Lock Bit is not set. */
- if(clear_block_lock_bit(info, (vu_long *)(info->start[s_first]))){
- return 1;
- }
-
- /* Start erase on unprotected sectors */
-#if defined(DEBUG)
- printf("Begin to erase now,s_first=0x%x s_last=0x%x...\n",s_first,s_last);
-#endif
- for (sect = s_first; sect<=s_last; sect++) {
- if (info->protect[sect] == 0) { /* not protected */
- vu_short *addr16 = (vu_short *)(info->start[sect]);
- vu_long *addr = (vu_long *)(info->start[sect]);
- printf(".");
- switch (info->portwidth) {
- case FLASH_CFI_16BIT:
- asm("sync");
- last = start = get_timer (0);
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
- /* Reset Array */
- *addr16 = 0xffff;
- asm("sync");
- /* Clear Status Register */
- *addr16 = 0x5050;
- asm("sync");
- /* Single Block Erase Command */
- *addr16 = 0x2020;
- asm("sync");
- /* Confirm */
- *addr16 = 0xD0D0;
- asm("sync");
- if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
- /* Resume Command, as per errata update */
- *addr16 = 0xD0D0;
- asm("sync");
- }
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
- /* wait at least 80us - let's wait 1 ms */
- *addr16 = 0x7070;
- udelay (1000);
- while ((*addr16 & ready) != ready) {
- if((*addr16 & erase_err_status)== erase_err_status){
- printf("Error in Block Erase - Lock Bit may be set!\n");
- printf("Status Register = 0x%X\n", (uint)*addr16);
- *addr16 = 0xFFFF; /* reset bank */
- asm("sync");
- return 1;
- }
- if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
- printf ("Timeout\n");
- *addr16 = 0xFFFF; /* reset bank */
- asm("sync");
- return 1;
- }
- /* show that we're waiting */
- if ((now - last) > 1000) { /* every second */
- putc ('.');
- last = now;
- }
- }
- /* reset to read mode */
- *addr16 = 0xFFFF;
- asm("sync");
- break;
- case FLASH_CFI_32BIT:
- asm("sync");
- last = start = get_timer (0);
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
- /* Reset Array */
- *addr = 0xffffffff;
- asm("sync");
- /* Clear Status Register */
- *addr = 0x50505050;
- asm("sync");
- /* Single Block Erase Command */
- *addr = 0x20202020;
- asm("sync");
- /* Confirm */
- *addr = 0xD0D0D0D0;
- asm("sync");
- if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
- /* Resume Command, as per errata update */
- *addr = 0xD0D0D0D0;
- asm("sync");
- }
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
- /* wait at least 80us - let's wait 1 ms */
- *addr = 0x70707070;
- udelay (1000);
- while ((*addr & ready) != ready) {
- if((*addr & erase_err_status)==erase_err_status){
- printf("Error in Block Erase - Lock Bit may be set!\n");
- printf("Status Register = 0x%X\n", (uint)*addr);
- *addr = 0xFFFFFFFF; /* reset bank */
- asm("sync");
- return 1;
- }
- if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
- printf ("Timeout\n");
- *addr = 0xFFFFFFFF; /* reset bank */
- asm("sync");
- return 1;
- }
- /* show that we're waiting */
- if ((now - last) > 1000) { /* every second */
- putc ('.');
- last = now;
- }
- }
- /* reset to read mode */
- *addr = 0xFFFFFFFF;
- asm("sync");
- break;
- } /* end switch */
- } /* end if */
- } /* end for */
-
- printf ("flash erase done\n");
- return 0;
-}
-
-/*-----------------------------------------------------------------------
- * Copy memory to flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-
-#define FLASH_BLOCK_SIZE 32
-
-int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
-{
- ulong cp, wp, data, count, temp;
-/* ulong temp[FLASH_BLOCK_SIZE/4];*/
- int i, l, rc;
-
- count = cnt;
- wp = (addr & ~3); /* get lower word aligned address */
-
- /*
- * 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<4 && cnt>0; ++i) {
- data = (data << 8) | *src++;
- --cnt;
- ++cp;
- }
- for (; cnt==0 && i<4; ++i, ++cp) {
- data = (data << 8) | (*(uchar *)cp);
- }
-
- if ((rc = write_word(info, wp, data)) != 0) {
- return (rc);
- }
- wp += 4;
- }
-
- cp = wp;
- /* handle unaligned block bytes , flash block size = 16bytes */
- wp = (cp+FLASH_BLOCK_SIZE-1) & ~(FLASH_BLOCK_SIZE-1);
- if ((wp-cp)>=cnt) {
- if ((rc = write_block(info,src,cp,wp-cp)) !=0)
- return (rc);
- src += wp-cp;
- cnt -= wp-cp;
- }
- /* handle aligned block bytes */
- temp = 0;
- printf("\n");
- while ( cnt >= FLASH_BLOCK_SIZE) {
- if ((rc = write_block(info,src,cp,FLASH_BLOCK_SIZE)) !=0) {
- return (rc);
- }
- src += FLASH_BLOCK_SIZE;
- cp += FLASH_BLOCK_SIZE;
- cnt -= FLASH_BLOCK_SIZE;
- if (((count-cnt)>>10)>temp) {
- temp=(count-cnt)>>10;
- printf("\r%lu KB",temp);
- }
- }
- printf("\n");
- wp = cp;
- /*
- * handle word aligned part
- */
- while (cnt >= 4) {
- data = 0;
- for (i=0; i<4; ++i) {
- data = (data << 8) | *src++;
- }
- if ((rc = write_word(info, wp, data)) != 0) {
- return (rc);
- }
- wp += 4;
- cnt -= 4;
- }
-
- if (cnt == 0) {
- return (0);
- }
-
- /*
- * handle unaligned tail bytes
- */
- data = 0;
- for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
- data = (data << 8) | *src++;
- --cnt;
- }
- for (; i<4; ++i, ++cp) {
- data = (data << 8) | (*(uchar *)cp);
- }
-
- return (write_word(info, wp, data));
-}
-#undef FLASH_BLOCK_SIZE
-
-/*-----------------------------------------------------------------------
- * Write block to Flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- * -1 Error
- */
-static int write_block(flash_info_t *info, uchar * src, ulong dest, ulong cnt)
-{
- vu_short *baddr, *addr = (vu_short *)dest;
- ushort data;
- ulong start, now, xsr,csr, ready;
- int flag;
-
- if (cnt==0) return 0;
- else if(cnt != (cnt& ~1)) return -1;
-
- /* Check if Flash is (sufficiently) erased */
- data = * src;
- data = (data<<8) | *(src+1);
- if ((*addr & data) != data) {
- return (2);
- }
- if (big_endian == 1) {
- ready = 0x0080;
- }
- else {
- ready = 0x8000;
- }
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
-
- do {
- /* Write Command */
- *addr = 0xe8e8;
- asm("sync");
- xsr = *addr;
- asm("sync");
- } while (!(xsr & ready)); /*wait until read */
- /*write count=BLOCK SIZE -1 */
- data=(cnt>>1)-1;
- data=(data<<8)|data;
- *addr = data; /* word mode, cnt/2 */
- asm("sync");
- baddr = addr;
- while(cnt) {
- data = * src++;
- data = (data<<8) | *src++;
- asm("sync");
- *baddr = data;
- asm("sync");
- ++baddr;
- cnt = cnt -2;
- }
- *addr = 0xd0d0; /* confirm write */
- start = get_timer(0);
- asm("sync");
- if (flag)
- enable_interrupts();
- /* data polling for D7 */
- flag = 0;
- while (((csr = *addr) & ready) != ready) {
- if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- flag = 1;
- break;
- }
- }
- if (csr & 0x4040) {
- printf ("CSR indicates write error (%04lx) at %08lx\n",
- csr, (ulong)addr);
- flag = 1;
- }
- /* Clear Status Registers Command */
- *addr = 0x5050;
- asm("sync");
- /* Reset to read array mode */
- *addr = 0xFFFF;
- asm("sync");
- return (flag);
-}
-
-
-/*-----------------------------------------------------------------------
- * Write a short word to Flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-static int write_short (flash_info_t *info, ulong dest, ushort data)
-{
- vu_short *addr = (vu_short *)dest;
- ulong start, now, csr, ready;
- 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();
-
- /* Write Command */
- *addr = 0x1010;
- start = get_timer (0);
- asm("sync");
- /* Write Data */
- *addr = data;
- asm("sync");
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
- if (big_endian == 1) {
- ready = 0x0080;
- }
- else {
- ready = 0x8000;
- }
- /* data polling for D7 */
- flag = 0;
- while (((csr = *addr) & ready) != ready) {
- if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- flag = 1;
- break;
- }
- }
- if (csr & 0x4040) {
- printf ("CSR indicates write error (%04lx) at %08lx\n",
- csr, (ulong)addr);
- flag = 1;
- }
- /* Clear Status Registers Command */
- *addr = 0x5050;
- asm("sync");
- /* Reset to read array mode */
- *addr = 0xFFFF;
- asm("sync");
- return (flag);
-}
-
-/*-----------------------------------------------------------------------
- * Write a word to Flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-static int write_word (flash_info_t *info, ulong dest, ulong data)
-{
- vu_long *addr = (vu_long *)dest;
- ulong start, csr, ready;
- int flag=0;
-
- switch (info->portwidth) {
- case FLASH_CFI_32BIT:
- /* Check if Flash is (sufficiently) erased */
- if ((*addr & data) != data) {
- return (2);
- }
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
-
- if (big_endian == 1) {
- ready = 0x0080;
- }
- else {
- ready = 0x8000;
- }
- if ((info->portwidth / info->chipwidth)==2) {
- ready += (ready <<16);
- }
- else {
- ready = ready << 16;
- }
- /* Write Command */
- *addr = 0x10101010;
- asm("sync");
- /* Write Data */
- *addr = data;
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
- /* data polling for D7 */
- start = get_timer (0);
- flag = 0;
- while (((csr = *addr) & ready) != ready) {
- if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- flag = 1;
- break;
- }
- }
- if (csr & 0x40404040) {
- printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
- flag = 1;
- }
- /* Clear Status Registers Command */
- *addr = 0x50505050;
- asm("sync");
- /* Reset to read array mode */
- *addr = 0xFFFFFFFF;
- asm("sync");
- break;
- case FLASH_CFI_16BIT:
- flag = write_short (info, dest, (unsigned short) (data>>16));
- if (flag == 0)
- flag = write_short (info, dest+2, (unsigned short) (data));
- break;
- }
- return (flag);
-}
-
-/*-----------------------------------------------------------------------
- * Clear Block Lock Bit, returns:
- * 0 - OK
- * 1 - Timeout
- */
-
-static int clear_block_lock_bit(flash_info_t * info, vu_long * addr)
-{
- ulong start, now, ready;
-
- /* Reset Array */
- *addr = 0xffffffff;
- asm("sync");
- /* Clear Status Register */
- *addr = 0x50505050;
- asm("sync");
-
- *addr = 0x60606060;
- asm("sync");
- *addr = 0xd0d0d0d0;
- asm("sync");
-
-
- if (big_endian == 1) {
- ready = 0x0080;
- }
- else {
- ready = 0x8000;
- }
- if ((info->portwidth / info->chipwidth)==2) {
- ready += (ready <<16);
- }
- else {
- ready = ready << 16;
- }
-#ifdef DEBUG
- printf ("%s: Ready flag is 0x%8lx\n", __FUNCTION__, ready);
-#endif
- *addr = 0x70707070; /* read status */
- start = get_timer (0);
- while((*addr & ready) != ready){
- if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
- printf ("Timeout on clearing Block Lock Bit\n");
- *addr = 0xFFFFFFFF; /* reset bank */
- asm("sync");
- return 1;
- }
- }
- return 0;
-}
-
-#endif /* !CONFIG_SYS_NO_FLASH */
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-06 16:27:31 +0000