Initial revision

3 files changed, 706 insertions, 0 deletions

diff --git a/board/bmw/Makefile b/board/bmw/Makefile
new file mode 100644
index 0000000000..46fe7910e7
--- /dev/null
+++ b/board/bmw/Makefile
@@ -0,0 +1,43 @@
+#
+# (C) Copyright 2002
+# James F. Dougherty, Broadcom Corporation, jfd@broadcom.com
+# 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 $(TOPDIR)/config.mk
+
+LIB	= lib$(BOARD).a
+
+OBJS	= $(BOARD).o flash.o ns16550.o serial.o m48t59y.o
+
+SOBJS	= early_init.o
+
+$(LIB):	.depend $(OBJS) $(SOBJS)
+	$(AR) crv $@ $^
+
+#########################################################################
+
+.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/board/bmw/README b/board/bmw/README
new file mode 100644
index 0000000000..55ef56ebe1
--- /dev/null
+++ b/board/bmw/README
@@ -0,0 +1,340 @@
+Broadcom 95xx BMW CPCI Platform
+
+Overview
+=========
+BMW is an MPC8245 system controller featuring:
+* 3U CPCI Form Factor
+* BCM5703 Gigabit Ethernet
+* M48T59Y NVRAM
+* 16MB DOC
+* DIP Socket for Socketed DOC up to 1GB
+* 64MB SDRAM
+* LCD Display
+* Configurable Jumper options for 66,85, and 100Mhz memory bus
+
+
+BMW System Address Map
+======================
+BMW uses the MPC8245 CHRP Address MAP B found in the MPC8245 Users Manual
+(P.121, Section 3.1 Address Maps, Address Map B). Other I/O devices found
+onboard the processor module are listed briefly below:
+
+0x00000000 - 0x40000000 - 64MB SDRAM SIMM
+                          (Unregistered PC-100 SDRAM DIMM Module)
+
+0xFF000000 - 0xFF001FFF - M-Systems DiskOnChip (TM) 2000
+                          TSOP 16MB (MD2211-D16-V3)
+
+0x70000000 - 0x70001FFF - M-Systems DiskOnChip (TM) 2000
+                          DIP32 (Socketed 16MB - 1GB ) *
+                          NOTE: this is not populated on all systems.
+
+0x7c000000 - 0x7c000000 - Reset Register
+                          (Write 0 to reset)
+
+0x7c000001 - 0x7c000001 - System LED
+                          (Clear Bit 7 to turn on, set to shut off)
+
+0x7c000002 - 0x7c000002 - M48T59 Watchdog IRQ3
+                          (Clear bit 7 to reset, set to assert IRQ3)
+
+0x7c000003 - 0x7c000003 - M48T59 Write-Protect Register
+                          (Clear bit 7 to make R/W, set to make R/O)
+
+0x7c002000 - 0x7c002003 - Infineon OSRAM DLR2416 4 Character
+                          5x7 Dot Matrix Alphanumeric Display
+                          (Each byte sets the appropriate character)
+
+0x7c004000 - 0x7c005FF0 - SGS-THOMSON M48T59Y 8K NVRAM/RTC
+                          NVRAM Memory Region
+
+0x7c005FF0 - 0x7c005FFF - SGS-THOMSON M48T59Y 8K NVRAM/RTC
+                          Realtime Clock Registers
+
+0xFFF00000 - 0xFFF80000 - 512K PLCC32 BootRom
+                          (AMD AM29F040, ST 29W040B)
+
+0xFFF00100 -              System Reset Vector
+
+
+IO/MMU (BAT) Configuration
+======================
+The following Block-Address-Translation (BAT) configuration
+is recommended to access all I/O devices.
+
+#define CFG_IBAT0L  (0x00000000 | BATL_PP_10 | BATL_MEMCOHERENCE)
+#define CFG_IBAT0U  (0x00000000 | BATU_BL_256M | BATU_VS | BATU_VP)
+
+#define CFG_IBAT1L  (0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT)
+#define CFG_IBAT1U  (0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP)
+
+#define CFG_IBAT2L  (0x80000000 | BATL_PP_10 | BATL_CACHEINHIBIT)
+#define CFG_IBAT2U  (0x80000000 | BATU_BL_256M | BATU_VS | BATU_VP)
+
+#define CFG_IBAT3L  (0xF0000000 | BATL_PP_10 | BATL_CACHEINHIBIT)
+#define CFG_IBAT3U  (0xF0000000 | BATU_BL_256M | BATU_VS | BATU_VP)
+
+#define CFG_DBAT0L  CFG_IBAT0L
+#define CFG_DBAT0U  CFG_IBAT0U
+#define CFG_DBAT1L  CFG_IBAT1L
+#define CFG_DBAT1U  CFG_IBAT1U
+#define CFG_DBAT2L  CFG_IBAT2L
+#define CFG_DBAT2U  CFG_IBAT2U
+#define CFG_DBAT3L  CFG_IBAT3L
+#define CFG_DBAT3U  CFG_IBAT3U
+
+
+Interrupt Mappings
+======================
+BMW uses MPC8245 discrete mode interrupts. With the following
+hardwired mappings:
+
+BCM5701 10/100/1000 Ethernet 		IRQ1
+CompactPCI Interrupt A			IRQ2
+RTC/Watchdog Interrupt			IRQ3
+Internal NS16552 UART			IRQ4
+
+
+Jumper Settings
+======================
+
+BMW has a jumper (JP600) for selecting 66, 85, or 100Mhz memory bus.
+A jumper (X) is a 0 bit.
+
+Hence 66= 10110
+      85= 11000
+     100= 10000
+
+Jumper Settings for various Speeds
+=======================
+J1 J2 J3 J4 J5
+    X        X    66Mhz
+=======================
+J1 J2 J3 J4 J5
+       X  X  X    85Mhz
+=======================
+J1 J2 J3 J4 J5
+    X  X  X  X   100Mhz
+=======================
+
+Obviously, 100Mhz memory bus is recommended for optimum performance.
+
+
+U-Boot
+===============
+Broadcom BMW board is supported under config_BWM option.
+Supported features:
+
+- NVRAM setenv/getenv (used by Linux Kernel for configuration variables)
+- BCM570x TFTP file transfer support
+- LCD Display Support
+- DOC Support - (underway)
+
+
+
+U-Boot 1.2.0 (Aug  6 2002 - 17:44:48)
+
+CPU:   MPC8245 Revision 16.20 at 264 MHz: 16 kB I-Cache 16 kB D-Cache
+Board: BMW MPC8245/KAHLUA2 - CHRP (MAP B)
+Built: Aug  6 2002 at 17:44:37
+Local Bus at 66 MHz
+DRAM:  64 MB
+FLASH: 4095 MB
+In:    serial
+Out:   serial
+Err:   serial
+DOC:   No DiskOnChip found
+Hit any key to stop autoboot:  0
+=>printenv
+bootdelay=5
+baudrate=9600
+clocks_in_mhz=1
+hostname=switch-2
+bootcmd=tftp 100000 vmlinux.img;bootm
+gateway=10.16.64.1
+ethaddr=00:00:10:18:10:10
+nfsroot=172.16.40.111:/boot/root-fs
+filesize=5ec8c
+netmask=255.255.240.0
+ipaddr=172.16.40.114
+serverip=172.16.40.111
+root=/dev/nfs
+stdin=serial
+stdout=serial
+stderr=serial
+
+Environment size: 315/8172 bytes
+=>boot
+
+
+
+
+
+
+
+DevTools
+========
+ELDK
+        DENX Embedded Linux Development Kit
+
+ROM Emulator
+	Grammar Engine PROMICE P1160-90-AI21E (2MBx8bit, 90ns access time)
+	Grammar Engine PL32E 32Pin PLCC Emulation cables
+	Grammar Engine 3VA8CON (3Volt adapter with Short cables)
+	Grammar Engine FPNET PromICE Ethernet Adapters
+
+ICE
+	WRS/EST VisionICE-II (PPC8240)
+
+
+
+=>reset
+
+
+U-Boot 1.2.0 (Aug  6 2002 - 17:44:48)
+
+CPU:   MPC8245 Revision 16.20 at 264 MHz: 16 kB I-Cache 16 kB D-Cache
+Board: BMW MPC8245/KAHLUA2 - CHRP (MAP B)
+Built: Aug  6 2002 at 17:44:37
+Local Bus at 66 MHz
+DRAM:  64 MB
+FLASH: 4095 MB
+In:    serial
+Out:   serial
+Err:   serial
+DOC:   No DiskOnChip found
+Hit any key to stop autoboot:  0
+
+Broadcom BCM5701 1000Base-T: bus 0, device 13, function 0: MBAR=0x80100000
+BCM570x PCI Memory base address @0x80100000
+eth0:Broadcom BCM5701 1000Base-T: 100 Mbps half duplex link up, flow control OFF
+eth0: Broadcom BCM5701 1000Base-T @0x80100000,node addr 000010181010
+eth0: BCM5700 with Broadcom BCM5701 Integrated Copper transceiver found
+eth0: 32-bit PCI 33MHz, MTU: 1500,Rx Checksum ON
+ARP broadcast 1
+TFTP from server 172.16.40.111; our IP address is 172.16.40.114
+Filename 'vmlinux.img'.
+Load address: 0x100000
+Loading: #################################################################
+         ####################################T #############################
+         ######################
+done
+Bytes transferred = 777199 (bdbef hex)
+
+eth0:Broadcom BCM5701 1000Base-T,HALT,POWER DOWN,done - offline.
+## Booting image at 00100000 ...
+   Image Name:   vmlinux.bin.gz
+   Created:      2002-08-06   6:30:13 UTC
+   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
+   Data Size:    777135 Bytes = 758 kB = 0 MB
+   Load Address: 00000000
+   Entry Point:  00000000
+   Verifying Checksum ... OK
+   Uncompressing Kernel Image ... OK
+Memory BAT mapping: BAT2=64Mb, BAT3=0Mb, residual: 0Mb
+Linux version 2.4.19-rc3 (jfd@que) (gcc version 2.95.3 20010111 (prerelease/franzo/20010111)) #168 Mon Aug 5 23:29:20 PDT 2002
+CPU:82xx: 32 I-Cache Block Size, 32 D-Cache Block Size PVR: 0x810000
+U-Boot Environment: 0xc01b08f0
+IP PNP: 802.3 Ethernet Address=<0:0:10:18:10:10>
+cpu0: MPC8245/KAHLUA-II : BMW Platform : 64MB RAM: BPLD Rev. 6e
+NOTICE: mounting root file system via NFS
+IP PNP: switch-2: eth0 IP 172.16.40.114/255.255.240.0 gateway 10.16.64.1 server 172.16.40.111
+On node 0 totalpages: 16384
+zone(0): 16384 pages.
+zone(1): 0 pages.
+zone(2): 0 pages.
+Kernel command line: console=ttyS0,9600 ip=172.16.40.114:172.16.40.111:10.16.64.1:255.255.240.0:switch-2:eth0 root=/dev/nfs rw nfsroot=172.16.40.111:/boot/root-fs,timeo=200,retrans=500 nfsaddrs=172.16.40.114:172.16.40.111
+root_dev_setup:/dev/nfs or 00:ff
+time_init: decrementer frequency = 16.501145 MHz
+Calibrating delay loop... 175.71 BogoMIPS
+Memory: 62572k available (1396k kernel code, 436k data, 100k init, 0k highmem)
+Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
+Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
+Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
+Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes)
+Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
+POSIX conformance testing by UNIFIX
+PCI: Probing PCI hardware
+Linux NET4.0 for Linux 2.4
+Based upon Swansea University Computer Society NET3.039
+Initializing RT netlink socket
+Starting kswapd
+devfs: v1.12a (20020514) Richard Gooch (rgooch@atnf.csiro.au)
+devfs: devfs_debug: 0x0
+devfs: boot_options: 0x1
+Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
+pty: 256 Unix98 ptys configured
+Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI enabled
+Testing ttyS0 (0xf7f51500, 0xf7f51500)...
+Testing ttyS1 (0xfc004600, 0xfc004600)...
+ttyS00 at 0xf7f51500 (irq = 24) is a ST16650
+ttyS01 at 0xfc004600 (irq = 25) is a 16550A
+Real Time Clock Driver v1.10e
+RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
+loop: loaded (max 8 devices)
+TFFS 5.1.1 Flash disk driver for DiskOnChip
+Copyright (C) 1998,2001 M-Systems Flash Disk Pioneers Ltd.
+DOC device(s) found: 1
+fl_init: registered device at major: 100
+fl_geninit: registered device at major: 100
+Partition check:
+ fla: p1
+partition: /dev/fl/0: start_sect: 0,nr_sects: 32000 Fl_blk_size[]: 16000KB
+partition: /dev/fl/1: start_sect: 2,nr_sects: 31998 Fl_blk_size[]: 15999KB
+partition: /dev/fl/2: start_sect: 0,nr_sects: 0 Fl_blk_size[]: 0KB
+partition: /dev/fl/3: start_sect: 0,nr_sects: 0 Fl_blk_size[]: 0KB
+Broadcom Gigabit Ethernet Driver bcm5700 ver. 3.0.7 (07/17/02)
+eth0: Broadcom BCM5701 found at mem bfff0000, IRQ 1, node addr 000010181010
+eth0: Broadcom BCM5701 Integrated Copper transceiver found
+eth0: Scatter-gather ON, 64-bit DMA ON, Tx Checksum ON, Rx Checksum ON, 802.1Q VLAN ON
+bond0 registered without MII link monitoring, in bonding mode.
+rtc: unable to get misc minor
+NET4: Linux TCP/IP 1.0 for NET4.0
+IP Protocols: ICMP, UDP, TCP, IGMP
+IP: routing cache hash table of 512 buckets, 4Kbytes
+TCP: Hash tables configured (established 4096 bind 4096)
+bcm5700: eth0 NIC Link is UP, 100 Mbps half duplex
+IP-Config: Gateway not on directly connected network.
+NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
+802.1Q VLAN Support v1.7 Ben Greear <greearb@candelatech.com>
+All bugs added by David S. Miller <davem@redhat.com>
+Looking up port of RPC 100003/2 on 172.16.40.111
+Looking up port of RPC 100005/1 on 172.16.40.111
+VFS: Mounted root (nfs filesystem).
+Mounted devfs on /dev
+Freeing unused kernel memory: 100k init
+INIT: version 2.78 booting
+Mounting local filesystems...
+not mounted anything
+Setting up symlinks in /dev...done.
+Setting up extra devices in /dev...done.
+Starting devfsd...Started device management daemon for /dev
+INIT: Entering runlevel: 2
+Starting internet superserver: inetd.
+
+
+Welcome to Linux/PPC
+MPC8245/BMW
+
+
+
+switch-2 login: root
+Password:
+PAM_unix[49]: (login) session opened for user root by LOGIN(uid=0)
+Last login: Thu Nov 25 11:51:14 1920 on console
+
+
+Welcome to Linux/PPC
+MPC8245/BMW
+
+
+
+login[49]: ROOT LOGIN on `console'
+
+root@switch-2:~# cat /proc/cpuinfo
+cpu             : 82xx
+revision        : 16.20 (pvr 8081 1014)
+bogomips        : 175.71
+vendor          : Broadcom
+machine         : BMW/MPC8245
+root@switch-2:~#
diff --git a/board/bmw/m48t59y.c b/board/bmw/m48t59y.c
new file mode 100644
index 0000000000..469f1adaf5
--- /dev/null
+++ b/board/bmw/m48t59y.c
@@ -0,0 +1,323 @@
+/*
+ * SGS M48-T59Y TOD/NVRAM Driver
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 1999, by Curt McDowell, 08-06-99, Broadcom Corp.
+ *
+ * (C) Copyright 2001, James Dougherty, 07/18/01, Broadcom Corp.
+ *
+ * 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
+ */
+
+/*
+ * SGS M48-T59Y TOD/NVRAM Driver
+ *
+ * The SGS M48 an 8K NVRAM starting at offset M48_BASE_ADDR and
+ * continuing for 8176 bytes. After that starts the Time-Of-Day (TOD)
+ * registers which are used to set/get the internal date/time functions.
+ *
+ * This module implements Y2K compliance by taking full year numbers
+ * and translating back and forth from the TOD 2-digit year.
+ *
+ * NOTE: for proper interaction with an operating system, the TOD should
+ * be used to store Universal Coordinated Time (GMT) and timezone
+ * conversions should be used.
+ *
+ * Here is a diagram of the memory layout:
+ *
+ * +---------------------------------------------+ 0xffe0a000
+ * | Non-volatile memory                         | .
+ * |                                             | .
+ * | (8176 bytes of Non-volatile memory)         | .
+ * |                                             | .
+ * +---------------------------------------------+ 0xffe0bff0
+ * | Flags                                       |
+ * +---------------------------------------------+ 0xffe0bff1
+ * | Unused                                      |
+ * +---------------------------------------------+ 0xffe0bff2
+ * | Alarm Seconds                               |
+ * +---------------------------------------------+ 0xffe0bff3
+ * | Alarm Minutes                               |
+ * +---------------------------------------------+ 0xffe0bff4
+ * | Alarm Date                                  |
+ * +---------------------------------------------+ 0xffe0bff5
+ * | Interrupts                                  |
+ * +---------------------------------------------+ 0xffe0bff6
+ * | WatchDog                                    |
+ * +---------------------------------------------+ 0xffe0bff7
+ * | Calibration                                 |
+ * +---------------------------------------------+ 0xffe0bff8
+ * | Seconds                                     |
+ * +---------------------------------------------+ 0xffe0bff9
+ * | Minutes                                     |
+ * +---------------------------------------------+ 0xffe0bffa
+ * | Hours                                       |
+ * +---------------------------------------------+ 0xffe0bffb
+ * | Day                                         |
+ * +---------------------------------------------+ 0xffe0bffc
+ * | Date                                        |
+ * +---------------------------------------------+ 0xffe0bffd
+ * | Month                                       |
+ * +---------------------------------------------+ 0xffe0bffe
+ * | Year (2 digits only)                        |
+ * +---------------------------------------------+ 0xffe0bfff
+ */
+#include <common.h>
+#include <rtc.h>
+#include "bmw.h"
+
+/*
+ * Imported from mousse.h:
+ *
+ *   TOD_REG_BASE		Base of m48t59y TOD registers
+ *   SYS_TOD_UNPROTECT()	Disable NVRAM write protect
+ *   SYS_TOD_PROTECT()		Re-enable NVRAM write protect
+ */
+
+#define YEAR		0xf
+#define MONTH		0xe
+#define DAY		0xd
+#define DAY_OF_WEEK	0xc
+#define HOUR		0xb
+#define MINUTE		0xa
+#define SECOND		0x9
+#define CONTROL		0x8
+#define WATCH		0x7
+#define INTCTL		0x6
+#define WD_DATE		0x5
+#define WD_HOUR		0x4
+#define WD_MIN		0x3
+#define WD_SEC		0x2
+#define _UNUSED		0x1
+#define FLAGS		0x0
+
+#define M48_ADDR	((volatile unsigned char *) TOD_REG_BASE)
+
+int m48_tod_init(void)
+{
+    SYS_TOD_UNPROTECT();
+
+    M48_ADDR[CONTROL] = 0;
+    M48_ADDR[WATCH] = 0;
+    M48_ADDR[INTCTL] = 0;
+
+    /*
+     * If the oscillator is currently stopped (as on a new part shipped
+     * from the factory), start it running.
+     *
+     * Here is an example of the TOD bytes on a brand new M48T59Y part:
+     *		00 00 00 00 00 00 00 00 00 88 8c c3 bf c8 f5 01
+     */
+
+    if (M48_ADDR[SECOND] & 0x80)
+	M48_ADDR[SECOND] = 0;
+
+    /* Is battery low */
+    if ( M48_ADDR[FLAGS] & 0x10) {
+	 printf("NOTICE: Battery low on Real-Time Clock (replace SNAPHAT).\n");
+    }
+
+    SYS_TOD_PROTECT();
+
+    return 0;
+}
+
+/*
+ * m48_tod_set
+ */
+
+static int to_bcd(int value)
+{
+    return value / 10 * 16 + value % 10;
+}
+
+static int from_bcd(int value)
+{
+    return value / 16 * 10 + value % 16;
+}
+
+static int day_of_week(int y, int m, int d)	/* 0-6 ==> Sun-Sat */
+{
+    static int t[] = {0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4};
+    y -= m < 3;
+    return (y + y/4 - y/100 + y/400 + t[m-1] + d) % 7;
+}
+
+/*
+ * Note: the TOD should store the current GMT
+ */
+
+int m48_tod_set(int year,		/* 1980-2079 */
+		int month,		/* 01-12 */
+		int day,		/* 01-31 */
+		int hour,		/* 00-23 */
+		int minute,		/* 00-59 */
+		int second)		/* 00-59 */
+
+{
+    SYS_TOD_UNPROTECT();
+
+    M48_ADDR[CONTROL] |= 0x80;	/* Set WRITE bit */
+
+    M48_ADDR[YEAR] = to_bcd(year % 100);
+    M48_ADDR[MONTH] = to_bcd(month);
+    M48_ADDR[DAY] = to_bcd(day);
+    M48_ADDR[DAY_OF_WEEK] = day_of_week(year, month, day) + 1;
+    M48_ADDR[HOUR] = to_bcd(hour);
+    M48_ADDR[MINUTE] = to_bcd(minute);
+    M48_ADDR[SECOND] = to_bcd(second);
+
+    M48_ADDR[CONTROL] &= ~0x80;	/* Clear WRITE bit */
+
+    SYS_TOD_PROTECT();
+
+    return 0;
+}
+
+/*
+ * Note: the TOD should store the current GMT
+ */
+
+int m48_tod_get(int *year,		/* 1980-2079 */
+		int *month,		/* 01-12 */
+		int *day,		/* 01-31 */
+		int *hour,		/* 00-23 */
+		int *minute,		/* 00-59 */
+		int *second)		/* 00-59 */
+{
+    int y;
+
+    SYS_TOD_UNPROTECT();
+
+    M48_ADDR[CONTROL] |= 0x40;	/* Set READ bit */
+
+    y = from_bcd(M48_ADDR[YEAR]);
+    *year = y < 80 ? 2000 + y : 1900 + y;
+    *month = from_bcd(M48_ADDR[MONTH]);
+    *day = from_bcd(M48_ADDR[DAY]);
+    /* day_of_week = M48_ADDR[DAY_OF_WEEK] & 0xf; */
+    *hour = from_bcd(M48_ADDR[HOUR]);
+    *minute = from_bcd(M48_ADDR[MINUTE]);
+    *second = from_bcd(M48_ADDR[SECOND] & 0x7f);
+
+    M48_ADDR[CONTROL] &= ~0x40;	/* Clear READ bit */
+
+    SYS_TOD_PROTECT();
+
+    return 0;
+}
+
+int m48_tod_get_second(void)
+{
+    return from_bcd(M48_ADDR[SECOND] & 0x7f);
+}
+
+/*
+ * Watchdog function
+ *
+ *  If usec is 0, the watchdog timer is disarmed.
+ *
+ *  If usec is non-zero, the watchdog timer is armed (or re-armed) for
+ *    approximately usec microseconds (if the exact requested usec is
+ *    not supported by the chip, the next higher available value is used).
+ *
+ *  Minimum watchdog timeout = 62500 usec
+ *  Maximum watchdog timeout = 124 sec (124000000 usec)
+ */
+
+void m48_watchdog_arm(int usec)
+{
+    int		mpy, res;
+
+    SYS_TOD_UNPROTECT();
+
+    if (usec == 0) {
+	res = 0;
+	mpy = 0;
+    } else if (usec < 2000000) {	/* Resolution: 1/16s if below 2s */
+	res = 0;
+	mpy = (usec + 62499) / 62500;
+    } else if (usec < 8000000) {	/* Resolution: 1/4s if below 8s */
+	res = 1;
+	mpy = (usec + 249999) / 250000;
+    } else if (usec < 32000000) {	/* Resolution: 1s if below 32s */
+	res = 2;
+	mpy = (usec + 999999) / 1000000;
+    } else {				/* Resolution: 4s up to 124s */
+	res = 3;
+	mpy = (usec + 3999999) / 4000000;
+	if (mpy > 31)
+	    mpy = 31;
+    }
+
+    M48_ADDR[WATCH] = (0x80 |		/* Steer to RST signal (IRQ = N/C) */
+		       mpy << 2 |
+		       res);
+
+    SYS_TOD_PROTECT();
+}
+
+/*
+ * U-Boot RTC support.
+ */
+void
+rtc_get( struct rtc_time *tmp )
+{
+	m48_tod_get(&tmp->tm_year,
+		    &tmp->tm_mon,
+		    &tmp->tm_mday,
+		    &tmp->tm_hour,
+		    &tmp->tm_min,
+		    &tmp->tm_sec);
+	tmp->tm_yday = 0;
+	tmp->tm_isdst= 0;
+
+#ifdef RTC_DEBUG
+	printf( "Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+		tmp->tm_hour, tmp->tm_min, tmp->tm_sec );
+#endif
+}
+
+void
+rtc_set( struct rtc_time *tmp )
+{
+	m48_tod_set(tmp->tm_year,		/* 1980-2079 */
+		    tmp->tm_mon,		/* 01-12 */
+		    tmp->tm_mday,              /* 01-31 */
+		    tmp->tm_hour,		/* 00-23 */
+		    tmp->tm_min,		/* 00-59 */
+		    tmp->tm_sec);		/* 00-59 */
+
+#ifdef RTC_DEBUG
+	printf( "Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+#endif
+
+}
+
+void
+rtc_reset (void)
+{
+  m48_tod_init();
+}
+