Initial revision

1 files changed, 648 insertions, 0 deletions

diff --git a/board/cogent/flash.c b/board/cogent/flash.c
new file mode 100644
index 0000000..86da80e
--- /dev/null
+++ b/board/cogent/flash.c
@@ -0,0 +1,648 @@
+/*
+ * (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
+ */
+
+#include <common.h>
+#include <board/cogent/flash.h>
+
+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
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+
+#if defined(CONFIG_CMA302)
+
+/*
+ * probe for the existence of flash at address "addr"
+ * 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
+ */
+static int
+c302f_probe_word(c302f_addr_t addr)
+{
+	/* reset the flash */
+	*addr = C302F_BNK_CMD_RST;
+
+	/* check the manufacturer id */
+	*addr = C302F_BNK_CMD_RD_ID;
+	if (*C302F_BNK_ADDR_MAN(addr) != C302F_BNK_RD_ID_MAN)
+		return 1;
+
+	/* check the device id */
+	*addr = C302F_BNK_CMD_RD_ID;
+	if (*C302F_BNK_ADDR_DEV(addr) != C302F_BNK_RD_ID_DEV)
+		return 2;
+
+#ifdef FLASH_DEBUG
+	{
+		int i;
+
+		printf("\nMaster Lock Config = 0x%08lx\n",
+			*C302F_BNK_ADDR_CFGM(addr));
+		for (i = 0; i < C302F_BNK_NBLOCKS; i++)
+			printf("Block %2d Lock Config = 0x%08lx\n",
+				i, *C302F_BNK_ADDR_CFG(i, addr));
+	}
+#endif
+
+	/* reset the flash again */
+	*addr = C302F_BNK_CMD_RST;
+
+	return 0;
+}
+
+/*
+ * probe for Cogent CMA302 flash module at address "base" and store
+ * info for any found into flash_info entry "fip". Must find at least
+ * one bank.
+ */
+static void
+c302f_probe(flash_info_t *fip, c302f_addr_t base)
+{
+	c302f_addr_t addr, eaddr;
+	int nbanks;
+
+	fip->size = 0L;
+	fip->sector_count = 0;
+
+	addr = base;
+	eaddr = C302F_BNK_ADDR_BASE(addr, C302F_MAX_BANKS);
+	nbanks = 0;
+
+	while (addr < eaddr) {
+		c302f_addr_t addrw, eaddrw, addrb;
+		int i, osc, nsc;
+
+		addrw = addr;
+		eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
+
+		while (addrw < eaddrw)
+			if (c302f_probe_word(addrw++) != 0)
+				goto out;
+
+		/* bank exists - append info for this bank to *fip */
+		fip->flash_id = FLASH_MAN_INTEL|FLASH_28F008S5;
+		fip->size += C302F_BNK_SIZE;
+		osc = fip->sector_count;
+		fip->sector_count += C302F_BNK_NBLOCKS;
+		if ((nsc = fip->sector_count) >= CFG_MAX_FLASH_SECT)
+			panic("Too many sectors in flash at address 0x%08lx\n",
+				(unsigned long)base);
+
+		addrb = addr;
+		for (i = osc; i < nsc; i++) {
+			fip->start[i] = (ulong)addrb;
+			fip->protect[i] = 0;
+			addrb = C302F_BNK_ADDR_NEXT_BLK(addrb);
+		}
+
+		addr = C302F_BNK_ADDR_NEXT_BNK(addr);
+		nbanks++;
+	}
+
+out:
+	if (nbanks == 0)
+		panic("ERROR: no flash found at address 0x%08lx\n",
+			(unsigned long)base);
+}
+
+static void
+c302f_reset(flash_info_t *info, int sect)
+{
+	c302f_addr_t addrw, eaddrw;
+
+	addrw = (c302f_addr_t)info->start[sect];
+	eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
+
+	while (addrw < eaddrw) {
+#ifdef FLASH_DEBUG
+		printf("  writing reset cmd to addr 0x%08lx\n",
+			(unsigned long)addrw);
+#endif
+		*addrw = C302F_BNK_CMD_RST;
+		addrw++;
+	}
+}
+
+static void
+c302f_erase_init(flash_info_t *info, int sect)
+{
+	c302f_addr_t addrw, saddrw, eaddrw;
+	int flag;
+
+#ifdef FLASH_DEBUG
+	printf("0x%08lx C302F_BNK_CMD_PROG\n", C302F_BNK_CMD_PROG);
+	printf("0x%08lx C302F_BNK_CMD_ERASE1\n", C302F_BNK_CMD_ERASE1);
+	printf("0x%08lx C302F_BNK_CMD_ERASE2\n", C302F_BNK_CMD_ERASE2);
+	printf("0x%08lx C302F_BNK_CMD_CLR_STAT\n", C302F_BNK_CMD_CLR_STAT);
+	printf("0x%08lx C302F_BNK_CMD_RST\n", C302F_BNK_CMD_RST);
+	printf("0x%08lx C302F_BNK_STAT_RDY\n", C302F_BNK_STAT_RDY);
+	printf("0x%08lx C302F_BNK_STAT_ERR\n", C302F_BNK_STAT_ERR);
+#endif
+
+	saddrw = (c302f_addr_t)info->start[sect];
+	eaddrw = C302F_BNK_ADDR_NEXT_WORD(saddrw);
+
+#ifdef FLASH_DEBUG
+	printf("erasing sector %d, start addr = 0x%08lx "
+		"(bank next word addr = 0x%08lx)\n", sect,
+		(unsigned long)saddrw, (unsigned long)eaddrw);
+#endif
+
+	/* Disable intrs which might cause a timeout here */
+	flag = disable_interrupts();
+
+	for (addrw = saddrw; addrw < eaddrw; addrw++) {
+#ifdef FLASH_DEBUG
+		printf("  writing erase cmd to addr 0x%08lx\n",
+			(unsigned long)addrw);
+#endif
+		*addrw = C302F_BNK_CMD_ERASE1;
+		*addrw = C302F_BNK_CMD_ERASE2;
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+}
+
+static int
+c302f_erase_poll(flash_info_t *info, int sect)
+{
+	c302f_addr_t addrw, saddrw, eaddrw;
+	int sectdone, haderr;
+
+	saddrw = (c302f_addr_t)info->start[sect];
+	eaddrw = C302F_BNK_ADDR_NEXT_WORD(saddrw);
+
+	sectdone = 1;
+	haderr = 0;
+
+	for (addrw = saddrw; addrw < eaddrw; addrw++) {
+		c302f_word_t stat = *addrw;
+
+#ifdef FLASH_DEBUG
+		printf("  checking status at addr "
+			"0x%08lx [0x%08lx]\n",
+			(unsigned long)addrw, stat);
+#endif
+		if ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY)
+			sectdone = 0;
+		else if ((stat & C302F_BNK_STAT_ERR) != 0) {
+			printf(" failed on sector %d "
+				"(stat = 0x%08lx) at "
+				"address 0x%08lx\n",
+				sect, stat,
+				(unsigned long)addrw);
+			*addrw = C302F_BNK_CMD_CLR_STAT;
+			haderr = 1;
+		}
+	}
+
+	if (haderr)
+		return (-1);
+	else
+		return (sectdone);
+}
+
+static int
+c302f_write_word(c302f_addr_t addr, c302f_word_t value)
+{
+	c302f_word_t stat;
+	ulong start;
+	int flag, retval;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	*addr = C302F_BNK_CMD_PROG;
+
+	*addr = value;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	retval = 0;
+
+	/* data polling for D7 */
+	start = get_timer (0);
+	do {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			retval = 1;
+			goto done;
+		}
+		stat = *addr;
+	} while ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY);
+
+	if ((stat & C302F_BNK_STAT_ERR) != 0) {
+		printf("flash program failed (stat = 0x%08lx) "
+			"at address 0x%08lx\n", (ulong)stat, (ulong)addr);
+		*addr = C302F_BNK_CMD_CLR_STAT;
+		retval = 3;
+	}
+
+done:
+	/* reset to read mode */
+	*addr = C302F_BNK_CMD_RST;
+
+	return (retval);
+}
+
+#endif	/* CONFIG_CMA302 */
+
+unsigned long
+flash_init(void)
+{
+	unsigned long total;
+	int i;
+	flash_info_t *fip;
+
+	/* Init: no FLASHes known */
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	fip = &flash_info[0];
+	total = 0L;
+
+#if defined(CONFIG_CMA302)
+	c302f_probe(fip, (c302f_addr_t)CFG_FLASH_BASE);
+	total += fip->size;
+	fip++;
+#endif
+
+#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
+	/* not yet ...
+	cmbf_probe(fip, (cmbf_addr_t)CMA_MB_FLASH_BASE);
+	total += fip->size;
+	fip++;
+	*/
+#endif
+
+	/*
+	 * protect monitor and environment sectors
+	 */
+
+#if CFG_MONITOR_BASE == CFG_FLASH_BASE
+	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 */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_ENV_ADDR,
+		      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+		      &flash_info[0]);
+#endif
+	return total;
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_28F008S5:	printf ("28F008S5\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 % 4) == 0)
+			printf ("\n   ");
+		printf (" %2d - %08lX%s", i,
+			info->start[i],
+			info->protect[i] ? " (RO)" : "     "
+		);
+	}
+	printf ("\n");
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+int
+flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+	int prot, sect, haderr;
+	ulong start, now, last;
+	void (*erase_init)(flash_info_t *, int);
+	int (*erase_poll)(flash_info_t *, int);
+	void (*reset)(flash_info_t *, int);
+	int rcode = 0;
+
+#ifdef FLASH_DEBUG
+	printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
+		"  Bank # %d: ", s_last - s_first + 1, s_first, s_last,
+		(info - flash_info) + 1);
+	flash_print_info(info);
+#endif
+
+	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;
+	}
+
+	switch (info->flash_id) {
+
+#if defined(CONFIG_CMA302)
+	case FLASH_MAN_INTEL|FLASH_28F008S5:
+		erase_init = c302f_erase_init;
+		erase_poll = c302f_erase_poll;
+		reset = c302f_reset;
+		break;
+#endif
+
+#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
+	case FLASH_MAN_INTEL|FLASH_28F800_B:
+	case FLASH_MAN_AMD|FLASH_AM29F800B:
+		/* not yet ...
+		erase_init = cmbf_erase_init;
+		erase_poll = cmbf_erase_poll;
+		reset = cmbf_reset;
+		break;
+		*/
+#endif
+
+	default:
+		printf ("Flash type %08lx not supported - 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 sector%s will not be erased!\n",
+			prot, (prot > 1 ? "s" : ""));
+	}
+
+	start = get_timer (0);
+	last = 0;
+	haderr = 0;
+
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			ulong estart;
+			int sectdone;
+
+			(*erase_init)(info, sect);
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+			estart = get_timer(start);
+
+			do {
+				now = get_timer(start);
+
+				if (now - estart > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout (sect %d)\n", sect);
+					haderr = 1;
+					break;
+				}
+
+#ifndef FLASH_DEBUG
+				/* show that we're waiting */
+				if ((now - last) > 1000) { /* every second */
+					putc ('.');
+					last = now;
+				}
+#endif
+
+				sectdone = (*erase_poll)(info, sect);
+
+				if (sectdone < 0) {
+					haderr = 1;
+					break;
+				}
+
+			} while (!sectdone);
+
+			if (haderr)
+				break;
+		}
+	}
+
+	if (haderr > 0) {
+		printf (" failed\n");
+	        rcode = 1;
+	}
+	else
+		printf (" done\n");
+
+	/* reset to read mode */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			(*reset)(info, sect);
+		}
+	}
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 3 - write error
+ */
+
+int
+write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+	ulong start, now, last;
+
+	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
+	 */
+	start = get_timer (0);
+	last = 0;
+	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;
+
+		/* show that we're waiting */
+		now = get_timer(start);
+		if ((now - last) > 1000) {	/* every second */
+			putc ('.');
+			last = now;
+		}
+	}
+
+	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
+ * 3 - write error
+ */
+static int
+write_word(flash_info_t *info, ulong dest, ulong data)
+{
+	int retval;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*(ulong *)dest & data) != data) {
+		return (2);
+	}
+
+	switch (info->flash_id) {
+
+#if defined(CONFIG_CMA302)
+	case FLASH_MAN_INTEL|FLASH_28F008S5:
+		retval = c302f_write_word((c302f_addr_t)dest, (c302f_word_t)data);
+		break;
+#endif
+
+#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
+	case FLASH_MAN_INTEL|FLASH_28F800_B:
+	case FLASH_MAN_AMD|FLASH_AM29F800B:
+		/* not yet ...
+		retval = cmbf_write_word((cmbf_addr_t)dest, (cmbf_word_t)data);
+		*/
+		retval = 3;
+		break;
+#endif
+
+	default:
+		printf ("Flash type %08lx not supported - aborted\n",
+			info->flash_id);
+		retval = 3;
+		break;
+	}
+
+	return (retval);
+}
+
+/*-----------------------------------------------------------------------
+ */