1 files changed, 445 insertions, 0 deletions
diff --git a/roms/u-boot/board/rbc823/flash.c b/roms/u-boot/board/rbc823/flash.c
new file mode 100644
index 00000000..8a226526
--- /dev/null
+++ b/roms/u-boot/board/rbc823/flash.c
@@ -0,0 +1,445 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+/*
+ * Functions
+ */
+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);
+
+unsigned long flash_init(void)
+{
+	unsigned long size_b0;
+	int i;
+
+	/* Init: no FLASHes known */
+	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+
+	/* Detect size */
+	size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
+			&flash_info[0]);
+
+	/* Setup offsets */
+	flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
+
+#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
+	/* Monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CONFIG_SYS_MONITOR_BASE,
+		      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
+		      &flash_info[0]);
+#endif
+
+	flash_info[0].size = size_b0;
+
+	return size_b0;
+}
+
+/*-----------------------------------------------------------------------
+ * Fix this to support variable sector sizes
+*/
+static void flash_get_offsets(ulong base, flash_info_t *info)
+{
+	int i;
+
+	/* set up sector start address table */
+	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+		/* set sector offsets for bottom boot block type	*/
+		for (i = 0; i < info->sector_count; i++)
+			info->start[i] = base + (i * 0x00010000);
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		puts("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_AM040:
+		printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
+		break;
+	case FLASH_AM400B:
+		printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
+		break;
+	case FLASH_AM400T:
+		printf("AM29LV400T (4 Mbit, top boot sector)\n");
+		break;
+	case FLASH_AM800B:
+		printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
+		break;
+	case FLASH_AM800T:
+		printf("AM29LV800T (8 Mbit, top boot sector)\n");
+		break;
+	case FLASH_AM160B:
+		printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
+		break;
+	case FLASH_AM160T:
+		printf("AM29LV160T (16 Mbit, top boot sector)\n");
+		break;
+	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;
+	}
+
+	if (info->size >> 20) {
+		printf("  Size: %ld MB in %d Sectors\n",
+			info->size >> 20,
+			info->sector_count);
+	} else {
+		printf("  Size: %ld KB in %d Sectors\n",
+			info->size >> 10,
+			info->sector_count);
+	}
+
+	puts("  Sector Start Addresses:");
+
+	for (i = 0; i < info->sector_count; ++i) {
+		if ((i % 5) == 0)
+			puts("\n   ");
+
+		printf(" %08lX%s",
+			info->start[i],
+			info->protect[i] ? " (RO)" : "     ");
+	}
+
+	putc('\n');
+	return;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size(vu_long *addr, flash_info_t *info)
+{
+	short i;
+	volatile unsigned char *caddr;
+	char value;
+
+	caddr = (volatile unsigned char *)addr ;
+
+	/* Write auto select command: read Manufacturer ID */
+
+	debug("Base address is: %8p\n", caddr);
+
+	caddr[0x0555] = 0xAA;
+	caddr[0x02AA] = 0x55;
+	caddr[0x0555] = 0x90;
+
+	value = caddr[0];
+
+	debug("Manufact ID: %02x\n", value);
+
+	switch (value) {
+	case 0x01:	/*AMD_MANUFACT*/
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+
+	case 0x04:	/*FUJ_MANUFACT*/
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		break;
+	}
+
+	value = caddr[1];			/* device ID		*/
+
+	debug("Device ID: %02x\n", value);
+
+	switch (value) {
+	case AMD_ID_LV040B:
+		info->flash_id += FLASH_AM040;
+		info->sector_count = 8;
+		info->size = 0x00080000;
+		break;				/* => 512Kb		*/
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		return 0;			/* => no or unknown flash */
+	}
+
+	flash_get_offsets((ulong)addr, &flash_info[0]);
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+		/*
+		 * read sector protection at sector address,
+		 * (A7 .. A0) = 0x02
+		 * D0 = 1 if protected
+		 */
+		caddr = (volatile unsigned char *)(info->start[i]);
+		info->protect[i] = caddr[2] & 1;
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		caddr = (volatile unsigned char *)info->start[0];
+		*caddr = 0xF0;	/* reset bank */
+	}
+
+	return info->size;
+}
+
+
+int	flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+	volatile unsigned char *addr =
+		(volatile unsigned char *)(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 - 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();
+
+	addr[0x0555] = 0xAA;
+	addr[0x02AA] = 0x55;
+	addr[0x0555] = 0x80;
+	addr[0x0555] = 0xAA;
+	addr[0x02AA] = 0x55;
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr = (volatile unsigned char *)(info->start[sect]);
+			addr[0] = 0x30;
+			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 = (volatile unsigned char *)(info->start[l_sect]);
+
+	while ((addr[0] & 0xFF) != 0xFF) {
+		now = get_timer(start);
+		if (now > CONFIG_SYS_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 = (volatile unsigned char *)info->start[0];
+
+	addr[0] = 0xF0;	/* reset bank */
+
+	printf(" done\n");
+	return 0;
+}
+
+/*
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+
+	wp = (addr & ~3);	/* get lower word aligned address */
+
+	/*
+	 * handle unaligned start bytes
+	 */
+	l = addr - wp;
+
+	if (l != 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);
+
+		rc = write_word(info, wp, data);
+
+		if (rc != 0)
+			return rc;
+
+		wp += 4;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 4) {
+		data = 0;
+		for (i = 0; i < 4; ++i)
+			data = (data << 8) | *src++;
+
+		rc = write_word(info, wp, data);
+
+		if (rc != 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);
+}
+
+/*
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word(flash_info_t *info, ulong dest, ulong data)
+{
+	volatile unsigned char *cdest, *cdata;
+	volatile unsigned char *addr =
+		(volatile unsigned char *)(info->start[0]);
+	ulong start;
+	int flag, count = 4 ;
+
+	cdest = (volatile unsigned char *)dest ;
+	cdata = (volatile unsigned char *)&data ;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_long *)dest)&data) != data)
+		return 2;
+
+	while (count--) {
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr[0x0555] = 0xAA;
+		addr[0x02AA] = 0x55;
+		addr[0x0555] = 0xA0;
+
+		*cdest = *cdata;
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* data polling for D7 */
+		start = get_timer(0);
+		while ((*cdest ^ *cdata) & 0x80) {
+			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
+				return 1;
+		}
+
+		cdata++ ;
+		cdest++ ;
+	}
+	return 0;
+}