Add support for IDS "NC650" board

1 files changed, 542 insertions, 0 deletions

diff --git a/board/nc650/flash.c b/board/nc650/flash.c
new file mode 100644
index 0000000..ce2f83b
--- /dev/null
+++ b/board/nc650/flash.c
@@ -0,0 +1,542 @@
+/*
+ * (C) Copyright 2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (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
+ */
+
+#undef DEBUG
+
+#include <common.h>
+#include <mpc8xx.h>
+
+#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
+#define CFG_OR_TIMING_FLASH_AT_50MHZ (OR_ACS_DIV1  | OR_TRLX | OR_CSNT_SAM | \
+				      OR_SCY_2_CLK | OR_EHTR | OR_BI)
+#endif
+
+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
+
+/*-----------------------------------------------------------------------
+ * Protection Flags:
+ */
+#define FLAG_PROTECT_SET	0x01
+#define FLAG_PROTECT_CLEAR	0x02
+
+/* Board support for 1 or 2 flash devices */
+#undef FLASH_PORT_WIDTH32
+#undef FLASH_PORT_WIDTH16
+#define FLASH_PORT_WIDTH8
+
+#ifdef FLASH_PORT_WIDTH16
+#define FLASH_PORT_WIDTH	ushort
+#define FLASH_PORT_WIDTHV	vu_short
+#elif FLASH_PORT_WIDTH32
+#define FLASH_PORT_WIDTH	ulong
+#define FLASH_PORT_WIDTHV	vu_long
+#else /* FLASH_PORT_WIDTH8 */
+#define FLASH_PORT_WIDTH	uchar
+#define FLASH_PORT_WIDTHV	vu_char
+#endif
+
+#define FPW			FLASH_PORT_WIDTH
+#define FPWV			FLASH_PORT_WIDTHV
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (FPWV * addr, flash_info_t * info);
+static int write_data (flash_info_t * info, ulong dest, FPW data);
+static void flash_get_offsets (ulong base, flash_info_t * info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	unsigned long size_b0;
+	int i;
+#ifdef CFG_OR_TIMING_FLASH_AT_50MHZ
+	int scy, trlx, flash_or_timing, clk_diff;
+
+	DECLARE_GLOBAL_DATA_PTR;
+
+	scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
+	if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
+		trlx = OR_TRLX;
+		scy *= 2;
+	} else
+		trlx = 0;
+
+		/* We assume that each 10MHz of bus clock require 1-clk SCY
+		 * adjustment.
+		 */
+	clk_diff = (gd->bus_clk / 1000000) - 50;
+
+		/* We need proper rounding here. This is what the "+5" and "-5"
+		 * are here for.
+		 */
+	if (clk_diff >= 0)
+		scy += (clk_diff + 5) / 10;
+	else
+		scy += (clk_diff - 5) / 10;
+
+		/* For bus frequencies above 50MHz, we want to use relaxed
+		 * timing (OR_TRLX).
+		 */
+	if (gd->bus_clk >= 50000000)
+		trlx = OR_TRLX;
+	else
+		trlx = 0;
+
+	if (trlx)
+		scy /= 2;
+
+	if (scy > 0xf)
+		scy = 0xf;
+	if (scy < 1)
+		scy = 1;
+
+	flash_or_timing = (scy << 4) | trlx |
+			  (CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK));
+#endif
+
+	/* 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 ((FPW *) 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);
+	}
+
+	/* Remap FLASH according to real size */
+#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
+	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
+#else
+	memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK);
+#endif
+	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_8 | BR_MS_GPCM | BR_V;
+
+	/* Re-do sizing to get full correct info */
+	size_b0 = flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	/* monitor protection ON by default */
+	(void) 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_SIZE - 1,
+			&flash_info[0]);
+#endif
+
+	flash_info[0].size = size_b0;
+
+	return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t * info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00020000);
+		}
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F320J3A:
+		printf ("28F320J3A\n");
+		break;
+	case FLASH_28F640J3A:
+		printf ("28F640J3A\n");
+		break;
+	case FLASH_28F128J3A:
+		printf ("28F128J3A\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;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (FPWV * addr, flash_info_t * info)
+{
+	FPW value;
+
+	addr[0] = (FPW) 0x00900090;
+
+	value = addr[0];
+
+	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
+
+	switch (value) {
+	case (FPW) INTEL_MANUFACT:
+		info->flash_id = FLASH_MAN_INTEL;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
+		return (0);			/* no or unknown flash  */
+	}
+
+#ifdef FLASH_PORT_WIDTH8
+	value = addr[2];			/* device ID        */
+#else
+	value = addr[1];			/* device ID        */
+#endif
+
+	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
+
+	switch (value) {
+	case (FPW) INTEL_ID_28F320J3A:
+		info->flash_id += FLASH_28F320J3A;
+		info->sector_count = 32;
+		info->size = 0x00400000;
+		break;				/* => 4 MB     */
+
+	case (FPW) INTEL_ID_28F640J3A:
+		info->flash_id += FLASH_28F640J3A;
+		info->sector_count = 64;
+		info->size = 0x00800000;
+		break;				/* => 8 MB     */
+
+	case (FPW) INTEL_ID_28F128J3A:
+		info->flash_id += FLASH_28F128J3A;
+		info->sector_count = 128;
+		info->size = 0x01000000;
+		break;				/* => 16 MB     */
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		break;
+	}
+
+	if (info->sector_count > CFG_MAX_FLASH_SECT) {
+		printf ("** ERROR: sector count %d > max (%d) **\n",
+				info->sector_count, CFG_MAX_FLASH_SECT);
+		info->sector_count = CFG_MAX_FLASH_SECT;
+	}
+
+	addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	ulong type, start, now, last;
+	int rcode = 0;
+
+	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;
+	}
+
+	type = (info->flash_id & FLASH_VENDMASK);
+	if ((type != FLASH_MAN_INTEL)) {
+		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");
+	}
+
+	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 */
+			FPWV *addr = (FPWV *) (info->start[sect]);
+			FPW status;
+
+			/* Disable interrupts which might cause a timeout here */
+			flag = disable_interrupts ();
+
+			*addr = (FPW) 0x00500050;	/* clear status register */
+			*addr = (FPW) 0x00200020;	/* erase setup */
+			*addr = (FPW) 0x00D000D0;	/* erase confirm */
+
+			/* re-enable interrupts if necessary */
+			if (flag)
+				enable_interrupts ();
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+			while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+			    if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
+				printf ("Timeout\n");
+				*addr = (FPW) 0x00B000B0;	/* suspend erase     */
+				*addr = (FPW) 0x00FF00FF;	/* reset to read mode */
+				rcode = 1;
+				break;
+			    }
+
+			    /* show that we're waiting */
+			    if ((now - last) > 1000) {	/* every second */
+				putc ('.');
+				last = now;
+			    }
+			}
+
+			*addr = (FPW) 0x00FF00FF;	/* reset to read mode */
+		}
+	}
+	printf (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	FPW data;
+
+	int i, l, rc, port_width;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+/* get lower word aligned address */
+#ifdef FLASH_PORT_WIDTH16
+	wp = (addr & ~1);
+	port_width = 2;
+#elif defined(FLASH_PORT_WIDTH32)
+	wp = (addr & ~3);
+	port_width = 4;
+#else
+	wp = addr;
+	port_width = 1;
+#endif
+
+	/*
+	 * 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 < port_width && cnt > 0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt == 0 && i < port_width; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *) cp);
+		}
+
+		if ((rc = write_data (info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += port_width;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= port_width) {
+		data = 0;
+		for (i = 0; i < port_width; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_data (info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += port_width;
+		cnt -= port_width;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i < port_width; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *) cp);
+	}
+
+	return (write_data (info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t * info, ulong dest, FPW data)
+{
+	FPWV *addr = (FPWV *) dest;
+	ulong status;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*addr & data) != data) {
+		printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	*addr = (FPW) 0x00400040;	/* write setup */
+	*addr = data;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts ();
+
+	start = get_timer (0);
+
+	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+
+	return (0);
+}