Initial revision

1 files changed, 486 insertions, 0 deletions

diff --git a/board/cu824/flash.c b/board/cu824/flash.c
new file mode 100644
index 000000000..0cec41ebd
--- /dev/null
+++ b/board/cu824/flash.c
@@ -0,0 +1,486 @@
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <mpc824x.h>
+#include <asm/processor.h>
+
+#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
+
+#define FLASH_BANK_SIZE 0x800000
+#define MAIN_SECT_SIZE  0x40000
+#define PARAM_SECT_SIZE 0x8000
+
+#define BOARD_CTRL_REG 0xFE800013
+
+flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
+
+static int write_data (flash_info_t *info, ulong dest, ulong *data);
+static void write_via_fpu(vu_long *addr, ulong *data);
+static __inline__ unsigned long get_msr(void);
+static __inline__ void set_msr(unsigned long msr);
+
+/*---------------------------------------------------------------------*/
+#undef	DEBUG_FLASH
+
+/*---------------------------------------------------------------------*/
+#ifdef DEBUG_FLASH
+#define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+#define DEBUGF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init(void)
+{
+    int i, j;
+    ulong size = 0;
+    volatile unsigned char *bcr = (volatile unsigned char *)(BOARD_CTRL_REG);
+
+    DEBUGF("Write protect was: 0x%02X\n", *bcr);
+    *bcr &= 0x1;	/* FWPT must be 0  */
+    *bcr |= 0x6;	/* FWP0 = FWP1 = 1 */
+    DEBUGF("Write protect is:  0x%02X\n", *bcr);
+
+    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+    	vu_long *addr = (vu_long *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
+
+	addr[0] = 0x00900090;
+
+	DEBUGF ("Flash bank # %d:\n"
+		"\tManuf. ID @ 0x%08lX: 0x%08lX\n"
+		"\tDevice ID @ 0x%08lX: 0x%08lX\n",
+		i,
+		(ulong)(&addr[0]), addr[0],
+		(ulong)(&addr[2]), addr[2]);
+
+	if ((addr[0] == addr[1]) && (addr[0] == INTEL_MANUFACT) &&
+	    (addr[2] == addr[3]) && (addr[2] == INTEL_ID_28F160F3B))
+	{
+	    flash_info[i].flash_id = (FLASH_MAN_INTEL & FLASH_VENDMASK) |
+	    			     (INTEL_ID_28F160F3B & FLASH_TYPEMASK);
+	} else {
+	    flash_info[i].flash_id = FLASH_UNKNOWN;
+	    addr[0] = 0xFFFFFFFF;
+	    goto Done;
+	}
+
+	DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
+
+	addr[0] = 0xFFFFFFFF;
+
+	flash_info[i].size = FLASH_BANK_SIZE;
+	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+	for (j = 0; j < flash_info[i].sector_count; j++) {
+		if (j <= 7) {
+			flash_info[i].start[j] = CFG_FLASH_BASE +
+			                         i * FLASH_BANK_SIZE +
+			                         j * PARAM_SECT_SIZE;
+		} else {
+			flash_info[i].start[j] = CFG_FLASH_BASE +
+			                         i * FLASH_BANK_SIZE +
+			                         (j - 7)*MAIN_SECT_SIZE;
+		}
+	}
+	size += flash_info[i].size;
+    }
+
+    /* Protect monitor and environment sectors
+     */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + FLASH_BANK_SIZE
+    flash_protect(FLAG_PROTECT_SET,
+              CFG_MONITOR_BASE,
+              CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+              &flash_info[1]);
+#else
+    flash_protect(FLAG_PROTECT_SET,
+              CFG_MONITOR_BASE,
+              CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+              &flash_info[0]);
+#endif
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+#if CFG_ENV_ADDR >= CFG_FLASH_BASE + FLASH_BANK_SIZE
+    flash_protect(FLAG_PROTECT_SET,
+              CFG_ENV_ADDR,
+              CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+              &flash_info[1]);
+#else
+    flash_protect(FLAG_PROTECT_SET,
+              CFG_ENV_ADDR,
+              CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+              &flash_info[0]);
+#endif
+#endif
+
+Done:
+    return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch ((i = info->flash_id & FLASH_VENDMASK)) {
+	case (FLASH_MAN_INTEL & FLASH_VENDMASK):
+		printf ("Intel: ");
+		break;
+	default:
+		printf ("Unknown Vendor 0x%04x ", i);
+		break;
+	}
+
+	switch ((i = info->flash_id & FLASH_TYPEMASK)) {
+	case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
+		printf ("28F160F3B (16Mbit)\n");
+		break;
+	default:
+		printf ("Unknown Chip Type 0x%04x\n", i);
+		goto Done;
+		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");
+
+Done:
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	ulong start, now, last;
+
+	DEBUGF ("Erase flash bank %d sect %d ... %d\n",
+		info - &flash_info[0], s_first, s_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;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) !=
+	    (FLASH_MAN_INTEL & FLASH_VENDMASK)) {
+		printf ("Can erase only Intel flash types - aborted\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");
+	}
+
+	start = get_timer (0);
+	last  = start;
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			vu_long *addr = (vu_long *)(info->start[sect]);
+
+			DEBUGF ("Erase sect %d @ 0x%08lX\n",
+				sect, (ulong)addr);
+
+			/* Disable interrupts which might cause a timeout
+			 * here.
+			 */
+			flag = disable_interrupts();
+
+			addr[0] = 0x00500050;	/* clear status register */
+			addr[0] = 0x00200020;	/* erase setup */
+			addr[0] = 0x00D000D0;	/* erase confirm */
+
+			addr[1] = 0x00500050;	/* clear status register */
+			addr[1] = 0x00200020;	/* erase setup */
+			addr[1] = 0x00D000D0;	/* erase confirm */
+
+			/* re-enable interrupts if necessary */
+			if (flag)
+				enable_interrupts();
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+			while (((addr[0] & 0x00800080) != 0x00800080) ||
+			       ((addr[1] & 0x00800080) != 0x00800080) ) {
+				if ((now=get_timer(start)) >
+				           CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					addr[0] = 0x00B000B0; /* suspend erase */
+					addr[0] = 0x00FF00FF; /* to read mode  */
+					return 1;
+				}
+
+				/* show that we're waiting */
+				if ((now - last) > 1000) {  /* every second  */
+					putc ('.');
+					last = now;
+				}
+			}
+
+			addr[0] = 0x00FF00FF;
+		}
+	}
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+#define	FLASH_WIDTH	8	/* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong wp, cp, msr;
+	int l, rc, i;
+	ulong data[2];
+	ulong *datah = &data[0];
+	ulong *datal = &data[1];
+
+	DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
+		addr, (ulong)src, cnt);
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+
+	msr = get_msr();
+	set_msr(msr | MSR_FP);
+
+	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower aligned address */
+
+	/*
+	 * handle unaligned start bytes
+	 */
+	if ((l = addr - wp) != 0) {
+		*datah = *datal = 0;
+
+		for (i = 0, cp = wp; i < l; i++, cp++) {
+			if (i >= 4) {
+				*datah = (*datah << 8) |
+				                ((*datal & 0xFF000000) >> 24);
+			}
+
+			*datal = (*datal << 8) | (*(uchar *)cp);
+		}
+		for (; i < FLASH_WIDTH && cnt > 0; ++i) {
+			char tmp;
+
+			tmp = *src;
+
+			src++;
+
+			if (i >= 4) {
+				*datah = (*datah << 8) |
+			                        ((*datal & 0xFF000000) >> 24);
+			}
+
+			*datal = (*datal << 8) | tmp;
+
+			--cnt; ++cp;
+		}
+
+		for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
+			if (i >= 4) {
+				*datah = (*datah << 8) |
+				                ((*datal & 0xFF000000) >> 24);
+			}
+
+			*datal = (*datah << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_data(info, wp, data)) != 0) {
+			set_msr(msr);
+			return (rc);
+		}
+
+		wp += FLASH_WIDTH;
+	}
+
+	/*
+	 * handle FLASH_WIDTH aligned part
+	 */
+	while (cnt >= FLASH_WIDTH) {
+		*datah = *(ulong *)src;
+		*datal = *(ulong *)(src + 4);
+		if ((rc = write_data(info, wp, data)) != 0) {
+			set_msr(msr);
+			return (rc);
+		}
+		wp  += FLASH_WIDTH;
+		cnt -= FLASH_WIDTH;
+		src += FLASH_WIDTH;
+	}
+
+	if (cnt == 0) {
+		set_msr(msr);
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	*datah = *datal = 0;
+	for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
+		char tmp;
+
+      		tmp = *src;
+
+		src++;
+
+		if (i >= 4) {
+			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
+		}
+
+		*datal = (*datal << 8) | tmp;
+
+		--cnt;
+	}
+
+	for (; i < FLASH_WIDTH; ++i, ++cp) {
+		if (i >= 4) {
+			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
+		}
+
+		*datal = (*datal << 8) | (*(uchar *)cp);
+	}
+
+	rc = write_data(info, wp, data);
+	set_msr(msr);
+
+	return (rc);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong *data)
+{
+	vu_long *addr = (vu_long *)dest;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if (((addr[0] & data[0]) != data[0]) ||
+	    ((addr[1] & data[1]) != data[1]) ) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	addr[0] = 0x00400040;		/* write setup */
+	write_via_fpu(addr, data);
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	start = get_timer (0);
+
+	while (((addr[0] & 0x00800080) != 0x00800080) ||
+	       ((addr[1] & 0x00800080) != 0x00800080) ) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			addr[0] = 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	addr[0] = 0x00FF00FF;	/* restore read mode */
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void write_via_fpu(vu_long *addr, ulong *data)
+{
+	__asm__ __volatile__ ("lfd  1, 0(%0)" : : "r" (data));
+	__asm__ __volatile__ ("stfd 1, 0(%0)" : : "r" (addr));
+}
+/*-----------------------------------------------------------------------
+ */
+static __inline__ unsigned long get_msr(void)
+{
+    unsigned long msr;
+
+    __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
+    return msr;
+}
+
+static __inline__ void set_msr(unsigned long msr)
+{
+    __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
+}