Initial revision

1 files changed, 700 insertions, 0 deletions

diff --git a/board/siemens/pcu_e/flash.c b/board/siemens/pcu_e/flash.c
new file mode 100644
index 0000000..b8c0df7
--- /dev/null
+++ b/board/siemens/pcu_e/flash.c
@@ -0,0 +1,700 @@
+/*
+ * (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 <mpc8xx.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
+
+/*---------------------------------------------------------------------*/
+#undef 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_long *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ *
+ * The PCU E uses an address map where flash banks are aligned top
+ * down, so that the "first" flash bank ends at top of memory, and
+ * the monitor entry point is at address (0xFFF00100). The second
+ * flash bank is mapped immediately below bank 0.
+ *
+ * This is NOT in conformance to the "official" memory map!
+ *
+ */
+
+#define PCU_MONITOR_BASE   ( (flash_info[0].start[0] + flash_info[0].size - 1) \
+			   - (0xFFFFFFFF - CFG_MONITOR_BASE) )
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	unsigned long base, 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 */
+
+	/*
+	 * Warning:
+	 *
+	 * Since the PCU E memory map assigns flash banks top down,
+	 * we swap the numbering later if both banks are equipped,
+	 * so they look like a contiguous area of memory.
+	 */
+	DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
+
+	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);
+	}
+
+	DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM);
+	size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]);
+
+	DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1);
+
+	if (size_b1 > size_b0) {
+		printf ("## ERROR: "
+			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
+			size_b1, size_b1<<20,
+			size_b0, size_b0<<20
+		);
+		flash_info[0].flash_id	= FLASH_UNKNOWN;
+		flash_info[1].flash_id	= FLASH_UNKNOWN;
+		flash_info[0].sector_count	= -1;
+		flash_info[1].sector_count	= -1;
+		flash_info[0].size		= 0;
+		flash_info[1].size		= 0;
+		return (0);
+	}
+
+	DEBUGF ("## Before remap: "
+		"BR0: 0x%08x    OR0: 0x%08x    "
+		"BR6: 0x%08x    OR6: 0x%08x\n",
+		memctl->memc_br0, memctl->memc_or0,
+		memctl->memc_br6, memctl->memc_or6);
+
+	/* Remap FLASH according to real size */
+	base = 0 - size_b0;
+	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+	memctl->memc_br0 = (base & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
+
+	DEBUGF("## BR0: 0x%08x    OR0: 0x%08x\n",
+		memctl->memc_br0, memctl->memc_or0);
+
+	/* Re-do sizing to get full correct info */
+	size_b0 = flash_get_size((vu_long *)base, &flash_info[0]);
+	base = 0 - size_b0;
+
+	flash_info[0].size = size_b0;
+
+	flash_get_offsets (base, &flash_info[0]);
+
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      PCU_MONITOR_BASE,
+		      PCU_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+
+#ifdef	CFG_ENV_IS_IN_FLASH
+	/* ENV protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_ENV_ADDR,
+		      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+		      &flash_info[0]);
+#endif
+
+	if (size_b1) {
+		flash_info_t tmp_info;
+
+		memctl->memc_or6 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
+		memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) |
+				    BR_PS_16 | BR_MS_GPCM | BR_V;
+
+		DEBUGF("## New BR6: 0x%08x    OR6: 0x%08x\n",
+			memctl->memc_br6, memctl->memc_or6);
+
+		/* Re-do sizing to get full correct info */
+		size_b1 = flash_get_size((vu_long *)(base - size_b1),
+					  &flash_info[1]);
+		base -= size_b1;
+
+		flash_get_offsets (base, &flash_info[1]);
+
+		flash_info[1].size = size_b1;
+
+#ifdef	CFG_ENV_IS_IN_FLASH
+		/* ENV protection ON by default */
+		flash_protect(FLAG_PROTECT_SET,
+			      CFG_ENV_ADDR,
+			      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+			      &flash_info[1]);
+#endif
+		/*
+		 * Swap bank numbers so that addresses are in ascending order
+		 */
+		tmp_info = flash_info[0];
+		flash_info[0] = flash_info[1];
+		flash_info[1] = tmp_info;
+	} else {
+		memctl->memc_br1 = 0;		/* invalidate bank */
+
+		flash_info[1].flash_id = FLASH_UNKNOWN;
+		flash_info[1].sector_count = -1;
+	}
+
+
+	DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+	return (size_b0 + size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+	short n;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) {
+		return;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AMDL322T:
+	case FLASH_AMDL323T:
+	case FLASH_AMDL324T:
+		/* set sector offsets for top boot block type		*/
+
+		base += info->size;
+		i = info->sector_count;
+		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/
+			base -= 8 << 10;
+			--i;
+			info->start[i] = base;
+		}
+		while (i > 0) {			/* 64k regular sectors	*/
+			base -= 64 << 10;
+			--i;
+			info->start[i] = base;
+		}
+		return;
+	case FLASH_AMDL322B:
+	case FLASH_AMDL323B:
+	case FLASH_AMDL324B:
+		/* set sector offsets for bottom boot block type	*/
+		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
+			info->start[i] = base;
+			base += 8 << 10;
+		}
+		while (base < info->size) {	/* 64k regular sectors	*/
+			info->start[i] = base;
+			base += 64 << 10;
+			++i;
+		}
+		return;
+	case FLASH_AMDL640:
+		/* set sector offsets for dual boot block type		*/
+		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
+			info->start[i] = base;
+			base += 8 << 10;
+		}
+		n = info->sector_count - 8;
+		while (i < n) {			/* 64k regular sectors	*/
+			info->start[i] = base;
+			base += 64 << 10;
+			++i;
+		}
+		while (i < info->sector_count) { /* 8 x 8k boot sectors	*/
+			info->start[i] = base;
+			base += 8 << 10;
+			++i;
+		}
+		return;
+	default:
+		return;
+	}
+	/* NOTREACHED */
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+	default:		printf ("Unknown Vendor ");	break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AMDL322B:	printf ("AM29DL322B (32 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AMDL322T:	printf ("AM29DL322T (32 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AMDL323B:	printf ("AM29DL323B (32 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AMDL323T:	printf ("AM29DL323T (32 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AMDL324B:	printf ("AM29DL324B (32 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AMDL324T:	printf ("AM29DL324T (32 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AMDL640:	printf ("AM29DL640D (64 Mbit, dual boot sector)\n");
+				break;
+	default:		printf ("Unknown Chip Type 0x%lX\n",
+					info->flash_id);
+				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 (vu_long *addr, flash_info_t *info)
+{
+	short i;
+	ushort value;
+	vu_short *saddr = (vu_short *)addr;
+
+	/* Write auto select command: read Manufacturer ID */
+	saddr[0x0555] = 0x00AA;
+	saddr[0x02AA] = 0x0055;
+	saddr[0x0555] = 0x0090;
+
+	value = saddr[0];
+
+	DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value);
+
+	switch (value) {
+	case (AMD_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case (FUJ_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	default:
+		DEBUGF("Unknown Manufacturer ID\n");
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* no or unknown flash	*/
+	}
+
+	value = saddr[1];			/* device ID		*/
+
+	DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value);
+
+	switch (value) {
+
+	case (AMD_ID_DL322T & 0xFFFF):
+		info->flash_id += FLASH_AMDL322T;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_DL322B & 0xFFFF):
+		info->flash_id += FLASH_AMDL322B;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_DL323T & 0xFFFF):
+		info->flash_id += FLASH_AMDL323T;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_DL323B & 0xFFFF):
+		info->flash_id += FLASH_AMDL323B;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_DL324T & 0xFFFF):
+		info->flash_id += FLASH_AMDL324T;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_DL324B & 0xFFFF):
+		info->flash_id += FLASH_AMDL324B;
+		info->sector_count = 71;
+		info->size = 0x00400000;
+		break;				/* => 8 MB		*/
+	case (AMD_ID_DL640  & 0xFFFF):
+		info->flash_id += FLASH_AMDL640;
+		info->sector_count = 142;
+		info->size = 0x00800000;
+		break;
+	default:
+		DEBUGF("Unknown Device ID\n");
+		info->flash_id = FLASH_UNKNOWN;
+		return (0);			/* => no or unknown flash */
+
+	}
+
+	flash_get_offsets ((ulong)addr, info);
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+#if 0
+		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+		/* D0 = 1 if protected */
+		saddr = (vu_short *)(info->start[i]);
+		info->protect[i] = saddr[2] & 1;
+#else
+		info->protect[i] =0;
+#endif
+	}
+
+	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;
+	}
+
+	saddr = (vu_short *)info->start[0];
+	*saddr = 0x00F0;	/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	vu_short *addr = (vu_short*)(info->start[0]);
+	int flag, prot, sect, l_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_UNKNOWN) ||
+	    (info->flash_id > FLASH_AMD_COMP)) {
+		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");
+	}
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	addr[0x0555] = 0x00AA;
+	addr[0x02AA] = 0x0055;
+	addr[0x0555] = 0x0080;
+	addr[0x0555] = 0x00AA;
+	addr[0x02AA] = 0x0055;
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr = (vu_short*)(info->start[sect]);
+			addr[0] = 0x0030;
+			l_sect = sect;
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay (1000);
+
+	/*
+	 * We wait for the last triggered sector
+	 */
+	if (l_sect < 0)
+		goto DONE;
+
+	start = get_timer (0);
+	last  = start;
+	addr = (vu_short*)(info->start[l_sect]);
+	while ((addr[0] & 0x0080) != 0x0080) {
+		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;
+		}
+	}
+
+DONE:
+	/* reset to read mode */
+	addr = (vu_short *)info->start[0];
+	addr[0] = 0x00F0;	/* reset bank */
+
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+#define FLASH_WIDTH	2	/* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+
+	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_data(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += FLASH_WIDTH;
+	}
+
+	/*
+	 * handle FLASH_WIDTH aligned part
+	 */
+	while (cnt >= FLASH_WIDTH) {
+		data = 0;
+		for (i=0; i<FLASH_WIDTH; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_data(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp  += FLASH_WIDTH;
+		cnt -= FLASH_WIDTH;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i<FLASH_WIDTH; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+	}
+
+	return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * 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_short *addr  = (vu_short*)(info->start[0]);
+	vu_short *sdest = (vu_short *)dest;
+	ushort sdata = (ushort)data;
+	ushort sval;
+	ulong start, passed;
+	int flag, rc;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*sdest & sdata) != sdata) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	addr[0x0555] = 0x00AA;
+	addr[0x02AA] = 0x0055;
+	addr[0x0555] = 0x00A0;
+
+#ifdef WORKAROUND_FOR_BROKEN_HARDWARE
+	/* work around the timeout bugs */
+	udelay(20);
+#endif
+
+	*sdest = sdata;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	rc = 0;
+	/* data polling for D7 */
+	start = get_timer (0);
+
+	for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) {
+
+		sval = *sdest;
+
+		if ((sval & 0x0080) == (sdata & 0x0080))
+			break;
+
+		if ((sval & 0x0020) == 0)	/* DQ5: Timeout? */
+			continue;
+
+		sval = *sdest;
+
+		if ((sval & 0x0080) != (sdata & 0x0080))
+			rc = 1;
+
+		break;
+	}
+
+	if (rc) {
+	    DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n",
+		 dest, sval, sdata);
+	}
+
+	if (passed >= CFG_FLASH_WRITE_TOUT) {
+		DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n",
+			dest, sval, sdata);
+		rc = 1;
+	}
+
+	/* reset to read mode */
+	addr = (vu_short *)info->start[0];
+	addr[0] = 0x00F0;	/* reset bank */
+
+	return (rc);
+}
+
+/*-----------------------------------------------------------------------
+ */