Patch by Raghu Krishnaprasad, 7 Aug 2003:

add support for Adder II MPC852T module

1 files changed, 501 insertions, 0 deletions

diff --git a/board/adderII/flash.c b/board/adderII/flash.c
new file mode 100644
index 0000000..77ab4f1
--- /dev/null
+++ b/board/adderII/flash.c
@@ -0,0 +1,501 @@
+/*
+ * (C) Copyright 2000-2003
+ * 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
+ */
+/******************************************************************************
+** Notes: AM29LV320DB - 90EI ( 32 Mbit device )
+** Sectors - Eight 8 Kb sector
+** 	   - Sixty three 64 Kb sector
+** Bottom boot sector
+******************************************************************************/
+#include <common.h>
+#include <mpc8xx.h>
+
+
+/******************************************************************************
+**	Defines
+******************************************************************************/
+#ifdef CONFIG_ADDERII
+
+#define ADDR0	0x0555
+#define ADDR1	0x02AA
+#define FLASH_WORD_SIZE unsigned short
+
+#endif
+
+#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
+
+/******************************************************************************
+**	Global Parameters
+******************************************************************************/
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/******************************************************************************
+**	Function Prototypes
+******************************************************************************/
+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 );
+
+int wait_for_DQ7( flash_info_t *info, int sect );
+
+/******************************************************************************
+** Function :	flash_init
+** Param    :   void
+** Notes    :   Initializes the Flash Chip
+******************************************************************************/
+ulong flash_init (void)
+{
+	ulong size_b0 = -1;
+	int i;
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	/* Set Flash to unknown */
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	/* Get the Flash Bank Size */
+
+	size_b0 = 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 = %ldMB\n",
+			size_b0, size_b0 >> 20);
+	}
+
+	/* Remap Flash according to size detected  */
+	memctl->memc_or0 = 0xFF800774;
+	memctl->memc_br0 = CFG_BR0_PRELIM;
+
+	/* Setup Flash Sector Offsets */
+
+	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+	/* Monitor Protection ON - default */
+
+#if ( CFG_MONITOR_BASE >= CFG_FLASH_BASE  )
+	flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+		       (CFG_MONITOR_BASE + monitor_flash_len - 1),
+		       &flash_info[0]);
+#endif
+
+	/* Protect Environment Variables */
+#ifdef CFG_ENV_IS_IN_FLASH
+	flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR,
+		       (CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]);
+#endif
+
+	return size_b0;
+}
+
+/******************************************************************************
+** Function : flash_get_offsets
+** Param    : ulong base, flash_into_t *info
+** Notes    :
+******************************************************************************/
+static void flash_get_offsets (ulong base, flash_info_t * info)
+{
+	return;
+}
+
+
+/******************************************************************************
+** Function : flash_print_info
+** Param    : flash_info_t
+** Notes    :
+******************************************************************************/
+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_AMD:
+		printf ("AMD ");
+		break;
+	case FLASH_MAN_FUJ:
+		printf ("FUJITSU ");
+		break;
+	case FLASH_MAN_BM:
+		printf ("BRIGHT MICRO ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM320B:
+		printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+		break;
+	case FLASH_AM320T:
+		printf ("AM29LV320T (32 Mbit, top boot 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;
+}
+
+/******************************************************************************
+** Function : flash_get_size
+** Param    : vu_long *addr, flash_info_t *info
+** Notes    :
+******************************************************************************/
+static ulong flash_get_size (vu_long * addr, flash_info_t * info)
+{
+	short i;
+	FLASH_WORD_SIZE manu_id, dev_id;
+	ulong base = (ulong) addr;
+	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
+
+	/* Write Auto Select Command and read Manufacturer's ID and Dev ID */
+
+	addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;
+	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;
+	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;
+
+	manu_id = addr2[0];
+
+	switch (manu_id) {
+	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;
+		break;
+	}
+
+	/* Read Device Id */
+	dev_id = addr2[1];
+
+	switch (dev_id) {
+	case (FLASH_WORD_SIZE) AMD_ID_LV320B:
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 71;	/* 8 - boot sec + 63 normal */
+		info->size = 0x400000;	/* 4MByte */
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		break;
+	}
+
+	/* Set up sector start Addresses */
+
+	if (info->flash_id & FLASH_BTYPE) {
+		/* set sector offsets for bottom boot block
+		 ** Eight 8 Kb Boot sectors
+		 ** Sixty Three 64Kb sectors
+		 */
+		for (i = 0; i < 8; i++) {
+			info->start[i] = base + (i * 0x00002000);
+		}
+		for (i = 8; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00010000) - 0x00070000;
+		}
+	}
+
+	/* Reset To read mode */
+
+	if (info->flash_id != FLASH_UNKNOWN) {
+		addr = (ulong *) info->start[0];
+		*addr = 0xF0F0F0F0;
+	}
+	return (info->size);
+}
+
+/*******************************************************************************
+** Function : flash_erase
+** Param    : flash_info_t *info, int s_first, int s_last
+** Notes    :
+******************************************************************************/
+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;
+	int i;
+
+	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]);
+
+			if ((info->flash_id & FLASH_VENDMASK) ==
+			    FLASH_MAN_SST) {
+				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) 0x00500050;	/* block erase */
+				for (i = 0; i < 50; i++)
+					udelay (1000);	/* wait 1 ms */
+			} else {
+				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;
+}
+
+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) {
+			putc ('.');
+			last = now;
+		}
+	}
+	return 0;
+}
+
+
+/******************************************************************************
+** Function : write_buff
+** Param    : flash_info_t *info, uchar *src, ulong addr, ulong cnt
+** Notes    :
+******************************************************************************/
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+
+	/* get lower word aligned address */
+	wp = (addr & ~3);
+
+	/*
+	 * 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));
+}
+
+
+/******************************************************************************
+** Function : write_word
+** Param    : flash_info_t *info, ulong dest, ulong data
+** Notes    :
+******************************************************************************/
+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 i;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((volatile FLASH_WORD_SIZE *) dest) &
+	     (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
+		return (2);
+	}
+
+	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
+		int flag;
+
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts ();
+
+		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);
+}