Initial revision

1 files changed, 471 insertions, 0 deletions

diff --git a/board/cray/L1/flash.c b/board/cray/L1/flash.c
new file mode 100644
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--- /dev/null
+++ b/board/cray/L1/flash.c
@@ -0,0 +1,471 @@
+/*
+ * (C) Copyright 2000
+ * 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
+ */
+
+/*
+ * Modified 4/5/2001
+ * Wait for completion of each sector erase command issued
+ * 4/5/2001
+ * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
+ */
+
+/*
+ * Modified July 20, 2001
+ * Strip down to support ONLY the AMD29F032B.
+ * Dave Updegraff - Cray, Inc. dave@cray.com
+ */
+
+#include <common.h>
+#include <ppc4xx.h>
+#include <asm/processor.h>
+
+/* The flash chip we use... */
+#define AMD_ID_F032B	0x41	/* 29F032B ID  32 Mbit,64 64Kx8 sectors */
+#define FLASH_AM320B    0x0009
+
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+#define ADDR0           0x5555
+#define ADDR1           0x2aaa
+#define FLASH_WORD_SIZE unsigned char
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	unsigned long size_b0, size_b1;
+	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 - FIXME XXX */
+
+	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+			size_b0, size_b0<<20);
+	}
+
+	/* Only one bank */
+	if (CFG_MAX_FLASH_BANKS == 1)
+	  {
+	    /* Setup offsets */
+	    flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
+
+#if 0
+	    /* Monitor protection ON by default */
+	    (void)flash_protect(FLAG_PROTECT_SET,
+				FLASH_BASE0_PRELIM,
+				FLASH_BASE0_PRELIM+CFG_MONITOR_LEN-1,
+				&flash_info[0]);
+#endif
+	    size_b1 = 0 ;
+	    flash_info[0].size = size_b0;
+	  }
+
+	return (size_b0 + size_b1);
+}
+
+
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	/* set up sector start address table */
+	for (i = 0; i < info->sector_count; i++)
+		info->start[i] = base + (i * 0x00010000);
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info  (flash_info_t *info)
+{
+	int i;
+        int k;
+        int size;
+        int erased;
+        volatile unsigned long *flash;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:	printf ("AMD ");		break;
+	default:		printf ("Unknown Vendor ");	break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM320B:printf ("AM29F032B (32 Mbit 64x64KB uniform sectors)\n");
+				break;
+	default:		printf ("Unknown Chip Type\n");
+				break;
+	}
+
+	printf ("  Size: %ld KB in %d Sectors\n",
+		info->size >> 10, info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+	for (i=0; i<info->sector_count; ++i) {
+                /*
+                 * 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   ");
+
+		printf (" %08lX%s%s",
+			info->start[i],
+			erased ? " E" : "  ",
+			info->protect[i] ? "RO " : "   "
+		);
+	}
+	printf ("\n");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+	short i;
+	FLASH_WORD_SIZE value;
+	ulong base = (ulong)addr;
+        volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
+
+	/* Write auto select command: read Manufacturer ID */
+	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
+	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
+	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
+
+	value = addr2[0];
+
+	switch (value) {
+	case (FLASH_WORD_SIZE)AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* no or unknown flash	*/
+	}
+
+	value = addr2[1];			/* device ID		*/
+
+	switch (value) {
+	case (FLASH_WORD_SIZE)AMD_ID_F032B:
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 64;
+		info->size = 0x0400000; /* => 4 MB */
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		return (0);			/* => no or unknown flash */
+
+	}
+
+	/* set up sector start address table */
+	for (i = 0; i < info->sector_count; i++)
+		info->start[i] = base + (i * 0x00010000);
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+		/* D0 = 1 if protected */
+		addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
+        info->protect[i] = addr2[2] & 1;
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		addr2 = (FLASH_WORD_SIZE *)info->start[0];
+		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
+	}
+
+	return (info->size);
+}
+
+int wait_for_DQ7(flash_info_t *info, int sect)
+{
+	ulong start, now, last;
+	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
+
+	start = get_timer (0);
+    last  = start;
+    while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)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 */
+            putc ('.');
+            last = now;
+        }
+    }
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
+	volatile FLASH_WORD_SIZE *addr2;
+	int flag, prot, sect, l_sect;
+
+	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_UNKNOWN) {
+		printf ("Can't erase unknown flash type - 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");
+	}
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+		    addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
+		    printf("Erasing sector %p\n", addr2);
+
+			addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
+			addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
+			addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
+			addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
+			addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
+			addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
+		    l_sect = sect;
+		    /*
+		     * Wait for each sector to complete, it's more
+		     * reliable.  According to AMD Spec, you must
+		     * issue all erase commands within a specified
+		     * timeout.  This has been seen to fail, especially
+		     * if printf()s are included (for debug)!!
+		     */
+		    wait_for_DQ7(info, sect);
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay (1000);
+
+	/* reset to read mode */
+	addr = (FLASH_WORD_SIZE *)info->start[0];
+	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
+
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 cp, wp, data;
+	int i, l, rc;
+
+	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;
+	}
+
+	/*
+	 * 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));
+}
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+        volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
+        volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
+        volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
+	ulong start;
+	int flag;
+        int i;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((volatile FLASH_WORD_SIZE *)dest) &
+             (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+        for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
+          {
+            addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
+            addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
+            addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
+
+            dest2[i] = data2[i];
+
+            /* re-enable interrupts if necessary */
+            if (flag)
+              enable_interrupts();
+
+            /* data polling for D7 */
+            start = get_timer (0);
+            while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
+                   (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
+              if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+                return (1);
+              }
+            }
+          }
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */