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-rw-r--r--board/mpc8540eval/flash.c892
1 files changed, 892 insertions, 0 deletions
diff --git a/board/mpc8540eval/flash.c b/board/mpc8540eval/flash.c
new file mode 100644
index 000000000..7300a041a
--- /dev/null
+++ b/board/mpc8540eval/flash.c
@@ -0,0 +1,892 @@
+/*
+ * (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(CFG_NO_FLASH)
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+#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
+
+/*
+ * 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<CFG_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 *)CFG_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 *)CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_info[0].size = size;
+
+#if !defined(CONFIG_RAM_AS_FLASH)
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection 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
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_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 CFG_FLASH_CFI
+ printf("Not define CFG_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 CFG_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)) > CFG_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)) > CFG_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%d 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)) > CFG_FLASH_WRITE_TOUT) {
+ flag = 1;
+ break;
+ }
+ }
+ if (csr & 0x4040) {
+ printf ("CSR indicates write error (%04x) 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)) > CFG_FLASH_WRITE_TOUT) {
+ flag = 1;
+ break;
+ }
+ }
+ if (csr & 0x4040) {
+ printf ("CSR indicates write error (%04x) 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) > CFG_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)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout on clearing Block Lock Bit\n");
+ *addr = 0xFFFFFFFF; /* reset bank */
+ asm("sync");
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#endif /* !CFG_NO_FLASH */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 02:05:47 +0000