* Patch by Devin Crumb, 02 Apr 2003:

  Fix clock divider rounding problem in drivers/serial.c

* Patch by Ken Chou, 19 June 2003:
  Added support for A3000 SBC board (Artis Microsystems Inc.)

1 files changed, 454 insertions, 0 deletions

diff --git a/board/a3000/flash.c b/board/a3000/flash.c
new file mode 100644
index 0000000..cbfd1d1
--- /dev/null
+++ b/board/a3000/flash.c
@@ -0,0 +1,454 @@
+/*
+ * (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>
+
+#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 DEBUG_FLASH
+
+#ifdef DEBUG_FLASH
+#define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+#define DEBUGF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_char *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, uchar *dest, uchar data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+#define BS(b)     (b)
+#define BYTEME(x) ((x) & 0xFF)
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	unsigned long flash_banks[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS;
+	unsigned long size, size_b[CFG_MAX_FLASH_BANKS];
+
+	int i;
+
+	/* Init: no FLASHes known */
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) 
+	{
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+
+		DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
+/*
+		size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
+*/
+		size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
+
+		if (flash_info[i].flash_id == FLASH_UNKNOWN) 
+		{
+			printf ("## Unknown FLASH on Bank %d: "
+				"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+				i, flash_info[i].flash_id,
+				size_b[i], size_b[i]<<20);
+		}
+		else
+		{
+			DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
+				i, flash_banks[i], size_b[i]);
+
+			flash_get_offsets (flash_banks[i], &flash_info[i]);
+			flash_info[i].size = size_b[i];
+		}
+	}
+
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	DEBUGF("protect monitor %x @ %x\n", CFG_MONITOR_BASE, CFG_MONITOR_LEN);
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+#endif
+
+#ifdef	CFG_ENV_IS_IN_FLASH
+	/* ENV protection ON by default */
+	DEBUGF("protect environtment %x @ %x\n", CFG_ENV_ADDR, CFG_ENV_SECT_SIZE);
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_ENV_ADDR,
+		      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+		      &flash_info[0]);
+#endif
+
+	size = 0;
+	DEBUGF("## Final Flash bank sizes: ");
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) 
+	{
+		DEBUGF("%08lx ", size_b[i]);
+		size += size_b[i];
+	}
+	DEBUGF("\n");
+	return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+		case FLASH_MAN_INTEL:
+		    for (i = 0; i < info->sector_count; i++) {
+				info->start[i] = base;
+				base += 0x00020000;		/* 128k per bank */
+		    }
+		    return;
+
+		default:
+		    printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
+		    return;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_SST:	printf ("SST ");		break;
+	case FLASH_MAN_STM:	printf ("STM ");		break;
+	case FLASH_MAN_INTEL:	printf ("Intel ");		break;
+	case FLASH_MAN_MT:	printf ("MT ");			break;
+	default:		printf ("Unknown Vendor ");	break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F320J3A:	
+			printf ("28F320J3A (32Mbit = 128K x 32)\n");
+			break;
+	case FLASH_28F640J3A:	
+			printf ("28F640J3A (64Mbit = 128K x 64)\n");
+			break;
+	case FLASH_28F128J3A:	
+			printf ("28F128J3A (128Mbit = 128K x 128)\n");
+			break;
+	default:		
+			printf ("Unknown Chip Type\n");
+			break;
+	}
+
+#if 1
+	if (info->size >= (1 << 20)) {
+		i = 20;
+	} else {
+		i = 10;
+	}
+	printf ("  Size: %ld %cB in %d Sectors\n",
+		info->size >> i,
+		(i == 20) ? 'M' : 'k',
+		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");
+#endif
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (vu_char *addr, flash_info_t *info)
+{
+	vu_char manuf, device;
+
+	addr[0] = BS(0x90);
+	manuf = BS(addr[0]);
+	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
+
+	switch (manuf) {
+	case BYTEME(AMD_MANUFACT):
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case BYTEME(FUJ_MANUFACT):
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	case BYTEME(SST_MANUFACT):
+		info->flash_id = FLASH_MAN_SST;
+		break;
+	case BYTEME(STM_MANUFACT):
+		info->flash_id = FLASH_MAN_STM;
+		break;
+	case BYTEME(INTEL_MANUFACT):
+		info->flash_id = FLASH_MAN_INTEL;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		addr[0] = BS(0xFF);		/* restore read mode, (yes, BS is a NOP) */
+		return 0;			/* no or unknown flash	*/
+	}
+
+	device = BS(addr[2]);			/* device ID		*/
+
+	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
+
+	switch (device) {
+	case BYTEME(INTEL_ID_28F320J3A):
+		info->flash_id += FLASH_28F320J3A;
+		info->sector_count = 32;
+		info->size = 0x00400000;
+		break;				/* =>  4 MB		*/
+
+	case BYTEME(INTEL_ID_28F640J3A):
+		info->flash_id += FLASH_28F640J3A;
+		info->sector_count = 64;
+		info->size = 0x00800000;
+		break;				/* => 8 MB		*/
+
+	case BYTEME(INTEL_ID_28F128J3A):
+		info->flash_id += FLASH_28F128J3A;
+		info->sector_count = 128;
+		info->size = 0x01000000;
+		break;				/* => 16 MB		*/
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		addr[0] = BS(0xFF);		/* restore read mode (yes, a NOP) */
+		return 0;			/* => no or unknown flash */
+
+	}
+
+	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] = BS(0xFF);		/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	int flag, prot, 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;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
+		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_char *addr = (vu_char *)(info->start[sect]);
+			unsigned long status;
+
+			/* Disable interrupts which might cause a timeout here */
+			flag = disable_interrupts();
+
+			*addr = BS(0x50);	/* clear status register */
+			*addr = BS(0x20);	/* erase setup */
+			*addr = BS(0xD0);	/* erase confirm */
+
+			/* re-enable interrupts if necessary */
+			if (flag) {
+				enable_interrupts();
+			}
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+			while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
+				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					*addr = BS(0xB0); /* suspend erase	  */
+					*addr = BS(0xFF); /* reset to read mode */
+					return 1;
+				}
+
+				/* show that we're waiting */
+				if ((now - last) > 1000) {	/* every second */
+					putc ('.');
+					last = now;
+				}
+			}
+
+			*addr = BS(0xFF);	/* reset to read mode */
+		}
+	}
+	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	1	/* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	uchar *wp = (uchar *)addr;
+	int rc;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+
+	while (cnt > 0) {
+		if ((rc = write_data(info, wp, *src)) != 0) {
+			return rc;
+		}
+		wp++;
+		src++;
+		cnt--;
+	}
+
+	return cnt;
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, uchar *dest, uchar data)
+{
+	vu_char *addr = (vu_char *)dest;
+	ulong status;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((BS(*addr) & data) != data) {
+		return 2;
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	*addr = BS(0x40);		/* write setup */
+	*addr = data;
+
+	/* re-enable interrupts if necessary */
+	if (flag) {
+		enable_interrupts();
+	}
+
+	start = get_timer (0);
+
+	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			*addr = BS(0xFF);	/* restore read mode */
+			return 1;
+		}
+	}
+
+	*addr = BS(0xFF);	/* restore read mode */
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ */