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-rw-r--r--board/ep8260/flash.c396
1 files changed, 396 insertions, 0 deletions
diff --git a/board/ep8260/flash.c b/board/ep8260/flash.c
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--- /dev/null
+++ b/board/ep8260/flash.c
@@ -0,0 +1,396 @@
+/*
+ * (C) Copyright 2001, 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002
+ * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
+ *
+ * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
+ *
+ * This file is based on board/tqm8260/flash.c.
+ *--------------------------------------------------------------------
+ * 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>
+
+#define V_ULONG(a) (*(volatile unsigned long *)( a ))
+#define V_BYTE(a) (*(volatile unsigned char *)( a ))
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+
+/*-----------------------------------------------------------------------
+ */
+void flash_reset(void)
+{
+ if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
+ V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
+ V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+ulong flash_get_size( ulong baseaddr, flash_info_t *info )
+{
+ short i;
+ unsigned long flashtest_h, flashtest_l;
+
+ /* Write auto select command sequence and test FLASH answer */
+ V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
+ V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
+ V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
+ V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
+ V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
+ V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
+
+ flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */
+ flashtest_l = V_ULONG(baseaddr + 4);
+
+ if ((int)flashtest_h == AMD_MANUFACT) {
+ info->flash_id = FLASH_MAN_AMD;
+ } else {
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ flashtest_h = V_ULONG(baseaddr + 8); /* device ID */
+ flashtest_l = V_ULONG(baseaddr + 12);
+ if (flashtest_h != flashtest_l) {
+ info->flash_id = FLASH_UNKNOWN;
+ return(0);
+ }
+ if (flashtest_h == AMD_ID_DL323B) {
+ info->flash_id += FLASH_AMDL323B;
+ info->sector_count = 71;
+ info->size = 0x01000000; /* 4 * 4 MB = 16 MB */
+ } else {
+ info->flash_id = FLASH_UNKNOWN;
+ return(0); /* no or unknown flash */
+ }
+
+ /* set up sector start adress table (bottom sector type) */
+ for (i = 0; i < 8; i++) {
+ info->start[i] = baseaddr + (i * 0x00008000);
+ }
+ for (i = 8; i < info->sector_count; i++) {
+ info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
+ }
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
+ (V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
+ info->protect[i] = 1; /* D0 = 1 if protected */
+ } else {
+ info->protect[i] = 0;
+ }
+ }
+
+ flash_reset();
+ return(info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init (void)
+{
+ unsigned long size_b0 = 0;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Static FLASH Bank configuration here (only one bank) */
+
+ size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0]);
+ if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0>>20);
+ }
+
+ /*
+ * protect monitor and environment sectors
+ */
+
+#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[0]);
+#endif
+
+ return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 >> 16) & 0xff) {
+ case FLASH_MAN_AMD: printf ("AMD "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\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");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, sect, l_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;
+ }
+
+ 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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
+ V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
+ V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
+ V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
+ V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
+ V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
+ udelay (1000);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ V_ULONG( info->start[sect] ) = 0x00300030;
+ V_ULONG( info->start[sect] + 4 ) = 0x00300030;
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ start = get_timer (0);
+ last = start;
+ while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
+ (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
+ {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ serial_putc ('.');
+ last = now;
+ }
+ }
+
+ DONE:
+ /* reset to read mode */
+ flash_reset ();
+
+ printf (" done\n");
+ return 0;
+}
+
+static int write_dword (flash_info_t *, ulong, unsigned char *);
+
+/*-----------------------------------------------------------------------
+ * 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 dp;
+ static unsigned char bb[8];
+ int i, l, rc, cc = cnt;
+
+ dp = (addr & ~7); /* get lower dword aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - dp) != 0) {
+ for (i = 0; i < 8; i++)
+ bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
+ if ((rc = write_dword(info, dp, bb)) != 0)
+ {
+ return (rc);
+ }
+ dp += 8;
+ cc -= 8 - l;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cc >= 8) {
+ if ((rc = write_dword(info, dp, src)) != 0) {
+ return (rc);
+ }
+ dp += 8;
+ src += 8;
+ cc -= 8;
+ }
+
+ if (cc <= 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ for (i = 0; i < 8; i++) {
+ bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
+ }
+ return (write_dword(info, dp, bb));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a dword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
+{
+ ulong start;
+ ulong cl = 0, ch =0;
+ int flag, i;
+
+ for (ch=0, i=0; i < 4; i++)
+ ch = (ch << 8) + *pdata++; /* high word */
+ for (cl=0, i=0; i < 4; i++)
+ cl = (cl << 8) + *pdata++; /* low word */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest) & ch) != ch
+ ||(*((vu_long *)(dest + 4)) & cl) != cl)
+ {
+ return (2);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
+ V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
+ V_ULONG( dest ) = ch;
+ V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
+ V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
+ V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
+ V_ULONG( dest + 4 ) = cl;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
+ ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
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