Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 4099 insertions, 0 deletions

diff --git a/arch/m68k/mac/Makefile b/arch/m68k/mac/Makefile
new file mode 100644
index 000000000..aa0eae562
--- /dev/null
+++ b/arch/m68k/mac/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Linux arch/m68k/mac source directory
+#
+
+obj-y		:= config.o macints.o iop.o via.o oss.o psc.o \
+			baboon.o macboing.o misc.o
diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c
new file mode 100644
index 000000000..a7d280220
--- /dev/null
+++ b/arch/m68k/mac/baboon.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Baboon Custom IC Management
+ *
+ * The Baboon custom IC controls the IDE, PCMCIA and media bay on the
+ * PowerBook 190. It multiplexes multiple interrupt sources onto the
+ * Nubus slot $C interrupt.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/irq.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_baboon.h>
+
+int baboon_present;
+static volatile struct baboon *baboon;
+
+/*
+ * Baboon initialization.
+ */
+
+void __init baboon_init(void)
+{
+	if (macintosh_config->ident != MAC_MODEL_PB190) {
+		baboon = NULL;
+		baboon_present = 0;
+		return;
+	}
+
+	baboon = (struct baboon *) BABOON_BASE;
+	baboon_present = 1;
+
+	pr_debug("Baboon detected at %p\n", baboon);
+}
+
+/*
+ * Baboon interrupt handler.
+ * XXX how do you clear a pending IRQ? is it even necessary?
+ */
+
+static void baboon_irq(struct irq_desc *desc)
+{
+	short events, irq_bit;
+	int irq_num;
+
+	events = baboon->mb_ifr & 0x07;
+	irq_num = IRQ_BABOON_0;
+	irq_bit = 1;
+	do {
+		if (events & irq_bit) {
+			events &= ~irq_bit;
+			generic_handle_irq(irq_num);
+		}
+		++irq_num;
+		irq_bit <<= 1;
+	} while (events);
+}
+
+/*
+ * Register the Baboon interrupt dispatcher on nubus slot $C.
+ */
+
+void __init baboon_register_interrupts(void)
+{
+	irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
+}
+
+/*
+ * The means for masking individual Baboon interrupts remains a mystery.
+ * However, since we only use the IDE IRQ, we can just enable/disable all
+ * Baboon interrupts. If/when we handle more than one Baboon IRQ, we must
+ * either figure out how to mask them individually or else implement the
+ * same workaround that's used for NuBus slots (see nubus_disabled and
+ * via_nubus_irq_shutdown).
+ */
+
+void baboon_irq_enable(int irq)
+{
+	mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
+}
+
+void baboon_irq_disable(int irq)
+{
+	mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
+}
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
new file mode 100644
index 000000000..382f656c2
--- /dev/null
+++ b/arch/m68k/mac/config.c
@@ -0,0 +1,1109 @@
+/*
+ *  linux/arch/m68k/mac/config.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Miscellaneous linux stuff
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/interrupt.h>
+/* keyb */
+#include <linux/random.h>
+#include <linux/delay.h>
+/* keyb */
+#include <linux/init.h>
+#include <linux/vt_kern.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <linux/pmu.h>
+#include <linux/rtc.h>
+
+#include <asm/setup.h>
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-mac.h>
+#include <asm/byteorder.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/machw.h>
+
+#include <asm/mac_iop.h>
+#include <asm/mac_via.h>
+#include <asm/mac_oss.h>
+#include <asm/mac_psc.h>
+#include <asm/config.h>
+
+/* Mac bootinfo struct */
+struct mac_booter_data mac_bi_data;
+
+/* The phys. video addr. - might be bogus on some machines */
+static unsigned long mac_orig_videoaddr;
+
+extern int mac_hwclk(int, struct rtc_time *);
+extern void iop_init(void);
+extern void via_init(void);
+extern void via_init_clock(void);
+extern void oss_init(void);
+extern void psc_init(void);
+extern void baboon_init(void);
+
+extern void mac_mksound(unsigned int, unsigned int);
+
+static void mac_get_model(char *str);
+static void mac_identify(void);
+static void mac_report_hardware(void);
+
+static void __init mac_sched_init(void)
+{
+	via_init_clock();
+}
+
+/*
+ * Parse a Macintosh-specific record in the bootinfo
+ */
+
+int __init mac_parse_bootinfo(const struct bi_record *record)
+{
+	int unknown = 0;
+	const void *data = record->data;
+
+	switch (be16_to_cpu(record->tag)) {
+	case BI_MAC_MODEL:
+		mac_bi_data.id = be32_to_cpup(data);
+		break;
+	case BI_MAC_VADDR:
+		mac_bi_data.videoaddr = be32_to_cpup(data);
+		break;
+	case BI_MAC_VDEPTH:
+		mac_bi_data.videodepth = be32_to_cpup(data);
+		break;
+	case BI_MAC_VROW:
+		mac_bi_data.videorow = be32_to_cpup(data);
+		break;
+	case BI_MAC_VDIM:
+		mac_bi_data.dimensions = be32_to_cpup(data);
+		break;
+	case BI_MAC_VLOGICAL:
+		mac_orig_videoaddr = be32_to_cpup(data);
+		mac_bi_data.videological =
+			VIDEOMEMBASE + (mac_orig_videoaddr & ~VIDEOMEMMASK);
+		break;
+	case BI_MAC_SCCBASE:
+		mac_bi_data.sccbase = be32_to_cpup(data);
+		break;
+	case BI_MAC_BTIME:
+		mac_bi_data.boottime = be32_to_cpup(data);
+		break;
+	case BI_MAC_GMTBIAS:
+		mac_bi_data.gmtbias = be32_to_cpup(data);
+		break;
+	case BI_MAC_MEMSIZE:
+		mac_bi_data.memsize = be32_to_cpup(data);
+		break;
+	case BI_MAC_CPUID:
+		mac_bi_data.cpuid = be32_to_cpup(data);
+		break;
+	case BI_MAC_ROMBASE:
+		mac_bi_data.rombase = be32_to_cpup(data);
+		break;
+	default:
+		unknown = 1;
+		break;
+	}
+	return unknown;
+}
+
+void __init config_mac(void)
+{
+	if (!MACH_IS_MAC)
+		pr_err("ERROR: no Mac, but config_mac() called!!\n");
+
+	mach_sched_init = mac_sched_init;
+	mach_init_IRQ = mac_init_IRQ;
+	mach_get_model = mac_get_model;
+	mach_hwclk = mac_hwclk;
+	mach_reset = mac_reset;
+	mach_halt = mac_poweroff;
+#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
+	mach_beep = mac_mksound;
+#endif
+
+	/*
+	 * Determine hardware present
+	 */
+
+	mac_identify();
+	mac_report_hardware();
+
+	/*
+	 * AFAIK only the IIci takes a cache card.  The IIfx has onboard
+	 * cache ... someone needs to figure out how to tell if it's on or
+	 * not.
+	 */
+
+	if (macintosh_config->ident == MAC_MODEL_IICI)
+		mach_l2_flush = via_l2_flush;
+
+	register_platform_power_off(mac_poweroff);
+}
+
+
+/*
+ * Macintosh Table: hardcoded model configuration data.
+ *
+ * Much of this was defined by Alan, based on who knows what docs.
+ * I've added a lot more, and some of that was pure guesswork based
+ * on hardware pages present on the Mac web site. Possibly wildly
+ * inaccurate, so look here if a new Mac model won't run. Example: if
+ * a Mac crashes immediately after the VIA1 registers have been dumped
+ * to the screen, it probably died attempting to read DirB on a RBV.
+ * Meaning it should have MAC_VIA_IICI here :-)
+ */
+
+struct mac_model *macintosh_config;
+EXPORT_SYMBOL(macintosh_config);
+
+static struct mac_model mac_data_table[] = {
+	/*
+	 * We'll pretend to be a Macintosh II, that's pretty safe.
+	 */
+
+	{
+		.ident		= MAC_MODEL_II,
+		.name		= "Unknown",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_II,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_UNSUPPORTED, /* IWM */
+	},
+
+	/*
+	 * Original Mac II hardware
+	 */
+
+	{
+		.ident		= MAC_MODEL_II,
+		.name		= "II",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_II,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_UNSUPPORTED, /* IWM */
+	}, {
+		.ident		= MAC_MODEL_IIX,
+		.name		= "IIx",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_II,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_IICX,
+		.name		= "IIcx",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_II,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_SE30,
+		.name		= "SE/30",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_II,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	},
+
+	/*
+	 * Weirdified Mac II hardware - all subtly different. Gee thanks
+	 * Apple. All these boxes seem to have VIA2 in a different place to
+	 * the Mac II (+1A000 rather than +4000)
+	 * CSA: see http://developer.apple.com/technotes/hw/hw_09.html
+	 */
+
+	{
+		.ident		= MAC_MODEL_IICI,
+		.name		= "IIci",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_IIFX,
+		.name		= "IIfx",
+		.adb_type	= MAC_ADB_IOP,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_IIFX,
+		.scc_type	= MAC_SCC_IOP,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_SWIM_IOP, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_IISI,
+		.name		= "IIsi",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_IIVI,
+		.name		= "IIvi",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_IIVX,
+		.name		= "IIvx",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	},
+
+	/*
+	 * Classic models (guessing: similar to SE/30? Nope, similar to LC...)
+	 */
+
+	{
+		.ident		= MAC_MODEL_CLII,
+		.name		= "Classic II",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_CCL,
+		.name		= "Color Classic",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_CCLII,
+		.name		= "Color Classic II",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	},
+
+	/*
+	 * Some Mac LC machines. Basically the same as the IIci, ADB like IIsi
+	 */
+
+	{
+		.ident		= MAC_MODEL_LC,
+		.name		= "LC",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_LCII,
+		.name		= "LC II",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_LCIII,
+		.name		= "LC III",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	},
+
+	/*
+	 * Quadra. Video is at 0xF9000000, via is like a MacII. We label it
+	 * differently as some of the stuff connected to VIA2 seems different.
+	 * Better SCSI chip and onboard ethernet using a NatSemi SONIC except
+	 * the 660AV and 840AV which use an AMD 79C940 (MACE).
+	 * The 700, 900 and 950 have some I/O chips in the wrong place to
+	 * confuse us. The 840AV has a SCSI location of its own (same as
+	 * the 660AV).
+	 */
+
+	{
+		.ident		= MAC_MODEL_Q605,
+		.name		= "Quadra 605",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_Q605_ACC,
+		.name		= "Quadra 605",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_Q610,
+		.name		= "Quadra 610",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_Q630,
+		.name		= "Quadra 630",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.ide_type	= MAC_IDE_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_PDS_COMM,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_Q650,
+		.name		= "Quadra 650",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	},
+	/* The Q700 does have a NS Sonic */
+	{
+		.ident		= MAC_MODEL_Q700,
+		.name		= "Quadra 700",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA2,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_Q800,
+		.name		= "Quadra 800",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_Q840,
+		.name		= "Quadra 840AV",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA3,
+		.scc_type	= MAC_SCC_PSC,
+		.ether_type	= MAC_ETHER_MACE,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_UNSUPPORTED, /* New Age */
+	}, {
+		.ident		= MAC_MODEL_Q900,
+		.name		= "Quadra 900",
+		.adb_type	= MAC_ADB_IOP,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA2,
+		.scc_type	= MAC_SCC_IOP,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_SWIM_IOP, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_Q950,
+		.name		= "Quadra 950",
+		.adb_type	= MAC_ADB_IOP,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA2,
+		.scc_type	= MAC_SCC_IOP,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_SWIM_IOP, /* SWIM */
+	},
+
+	/*
+	 * Performa - more LC type machines
+	 */
+
+	{
+		.ident		= MAC_MODEL_P460,
+		.name		= "Performa 460",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P475,
+		.name		= "Performa 475",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P475F,
+		.name		= "Performa 475",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P520,
+		.name		= "Performa 520",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P550,
+		.name		= "Performa 550",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	},
+	/* These have the comm slot, and therefore possibly SONIC ethernet */
+	{
+		.ident		= MAC_MODEL_P575,
+		.name		= "Performa 575",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS_COMM,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P588,
+		.name		= "Performa 588",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.ide_type	= MAC_IDE_QUADRA,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_PDS_COMM,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_TV,
+		.name		= "TV",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_P600,
+		.name		= "Performa 600",
+		.adb_type	= MAC_ADB_EGRET,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_LC,
+		.scc_type	= MAC_SCC_II,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_LC, /* SWIM */
+	},
+
+	/*
+	 * Centris - just guessing again; maybe like Quadra.
+	 * The C610 may or may not have SONIC. We probe to make sure.
+	 */
+
+	{
+		.ident		= MAC_MODEL_C610,
+		.name		= "Centris 610",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_C650,
+		.name		= "Centris 650",
+		.adb_type	= MAC_ADB_II,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_QUADRA, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_C660,
+		.name		= "Centris 660AV",
+		.adb_type	= MAC_ADB_CUDA,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_QUADRA3,
+		.scc_type	= MAC_SCC_PSC,
+		.ether_type	= MAC_ETHER_MACE,
+		.expansion_type	= MAC_EXP_PDS_NUBUS,
+		.floppy_type	= MAC_FLOPPY_UNSUPPORTED, /* New Age */
+	},
+
+	/*
+	 * The PowerBooks all the same "Combo" custom IC for SCSI and SCC
+	 * and a PMU (in two variations?) for ADB. Most of them use the
+	 * Quadra-style VIAs. A few models also have IDE from hell.
+	 */
+
+	{
+		.ident		= MAC_MODEL_PB140,
+		.name		= "PowerBook 140",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB145,
+		.name		= "PowerBook 145",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB150,
+		.name		= "PowerBook 150",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_OLD,
+		.ide_type	= MAC_IDE_PB,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB160,
+		.name		= "PowerBook 160",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB165,
+		.name		= "PowerBook 165",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB165C,
+		.name		= "PowerBook 165c",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB170,
+		.name		= "PowerBook 170",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB180,
+		.name		= "PowerBook 180",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB180C,
+		.name		= "PowerBook 180c",
+		.adb_type	= MAC_ADB_PB1,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB190,
+		.name		= "PowerBook 190",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.ide_type	= MAC_IDE_BABOON,
+		.scc_type	= MAC_SCC_QUADRA,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM 2 */
+	}, {
+		.ident		= MAC_MODEL_PB520,
+		.name		= "PowerBook 520",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_QUADRA,
+		.scsi_type	= MAC_SCSI_OLD,
+		.scc_type	= MAC_SCC_QUADRA,
+		.ether_type	= MAC_ETHER_SONIC,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM 2 */
+	},
+
+	/*
+	 * PowerBook Duos are pretty much like normal PowerBooks
+	 * All of these probably have onboard SONIC in the Dock which
+	 * means we'll have to probe for it eventually.
+	 */
+
+	{
+		.ident		= MAC_MODEL_PB210,
+		.name		= "PowerBook Duo 210",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB230,
+		.name		= "PowerBook Duo 230",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB250,
+		.name		= "PowerBook Duo 250",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB270C,
+		.name		= "PowerBook Duo 270c",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB280,
+		.name		= "PowerBook Duo 280",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	}, {
+		.ident		= MAC_MODEL_PB280C,
+		.name		= "PowerBook Duo 280c",
+		.adb_type	= MAC_ADB_PB2,
+		.via_type	= MAC_VIA_IICI,
+		.scsi_type	= MAC_SCSI_DUO,
+		.scc_type	= MAC_SCC_QUADRA,
+		.expansion_type	= MAC_EXP_NUBUS,
+		.floppy_type	= MAC_FLOPPY_OLD, /* SWIM */
+	},
+
+	/*
+	 * Other stuff?
+	 */
+
+	{
+		.ident		= -1
+	}
+};
+
+static struct resource scc_a_rsrcs[] = {
+	{ .flags = IORESOURCE_MEM },
+	{ .flags = IORESOURCE_IRQ },
+};
+
+static struct resource scc_b_rsrcs[] = {
+	{ .flags = IORESOURCE_MEM },
+	{ .flags = IORESOURCE_IRQ },
+};
+
+struct platform_device scc_a_pdev = {
+	.name           = "scc",
+	.id             = 0,
+};
+EXPORT_SYMBOL(scc_a_pdev);
+
+struct platform_device scc_b_pdev = {
+	.name           = "scc",
+	.id             = 1,
+};
+EXPORT_SYMBOL(scc_b_pdev);
+
+static void __init mac_identify(void)
+{
+	struct mac_model *m;
+
+	/* Penguin data useful? */
+	int model = mac_bi_data.id;
+	if (!model) {
+		/* no bootinfo model id -> NetBSD booter was used! */
+		/* XXX FIXME: breaks for model > 31 */
+		model = (mac_bi_data.cpuid >> 2) & 63;
+		pr_warn("No bootinfo model ID, using cpuid instead (obsolete bootloader?)\n");
+	}
+
+	macintosh_config = mac_data_table;
+	for (m = macintosh_config; m->ident != -1; m++) {
+		if (m->ident == model) {
+			macintosh_config = m;
+			break;
+		}
+	}
+
+	/* Set up serial port resources for the console initcall. */
+
+	scc_a_rsrcs[0].start     = (resource_size_t)mac_bi_data.sccbase + 2;
+	scc_a_rsrcs[0].end       = scc_a_rsrcs[0].start;
+	scc_a_pdev.num_resources = ARRAY_SIZE(scc_a_rsrcs);
+	scc_a_pdev.resource      = scc_a_rsrcs;
+
+	scc_b_rsrcs[0].start     = (resource_size_t)mac_bi_data.sccbase;
+	scc_b_rsrcs[0].end       = scc_b_rsrcs[0].start;
+	scc_b_pdev.num_resources = ARRAY_SIZE(scc_b_rsrcs);
+	scc_b_pdev.resource      = scc_b_rsrcs;
+
+	switch (macintosh_config->scc_type) {
+	case MAC_SCC_PSC:
+		scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC_A;
+		scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC_B;
+		break;
+	default:
+		/* On non-PSC machines, the serial ports share an IRQ. */
+		if (macintosh_config->ident == MAC_MODEL_IIFX) {
+			scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC;
+			scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC;
+		} else {
+			scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_AUTO_4;
+			scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_AUTO_4;
+		}
+		break;
+	}
+
+	pr_info("Detected Macintosh model: %d\n", model);
+
+	/*
+	 * Report booter data:
+	 */
+	printk(KERN_DEBUG " Penguin bootinfo data:\n");
+	printk(KERN_DEBUG " Video: addr 0x%lx row 0x%lx depth %lx dimensions %ld x %ld\n",
+		mac_bi_data.videoaddr, mac_bi_data.videorow,
+		mac_bi_data.videodepth, mac_bi_data.dimensions & 0xFFFF,
+		mac_bi_data.dimensions >> 16);
+	printk(KERN_DEBUG " Videological 0x%lx phys. 0x%lx, SCC at 0x%lx\n",
+		mac_bi_data.videological, mac_orig_videoaddr,
+		mac_bi_data.sccbase);
+	printk(KERN_DEBUG " Boottime: 0x%lx GMTBias: 0x%lx\n",
+		mac_bi_data.boottime, mac_bi_data.gmtbias);
+	printk(KERN_DEBUG " Machine ID: %ld CPUid: 0x%lx memory size: 0x%lx\n",
+		mac_bi_data.id, mac_bi_data.cpuid, mac_bi_data.memsize);
+
+	iop_init();
+	oss_init();
+	via_init();
+	psc_init();
+	baboon_init();
+
+#ifdef CONFIG_ADB_CUDA
+	find_via_cuda();
+#endif
+#ifdef CONFIG_ADB_PMU
+	find_via_pmu();
+#endif
+}
+
+static void __init mac_report_hardware(void)
+{
+	pr_info("Apple Macintosh %s\n", macintosh_config->name);
+}
+
+static void mac_get_model(char *str)
+{
+	strcpy(str, "Macintosh ");
+	strcat(str, macintosh_config->name);
+}
+
+static const struct resource mac_scsi_iifx_rsrc[] __initconst = {
+	{
+		.flags = IORESOURCE_IRQ,
+		.start = IRQ_MAC_SCSI,
+		.end   = IRQ_MAC_SCSI,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50008000,
+		.end   = 0x50009FFF,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50008000,
+		.end   = 0x50009FFF,
+	},
+};
+
+static const struct resource mac_scsi_duo_rsrc[] __initconst = {
+	{
+		.flags = IORESOURCE_MEM,
+		.start = 0xFEE02000,
+		.end   = 0xFEE03FFF,
+	},
+};
+
+static const struct resource mac_scsi_old_rsrc[] __initconst = {
+	{
+		.flags = IORESOURCE_IRQ,
+		.start = IRQ_MAC_SCSI,
+		.end   = IRQ_MAC_SCSI,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50010000,
+		.end   = 0x50011FFF,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50006000,
+		.end   = 0x50007FFF,
+	},
+};
+
+static const struct resource mac_scsi_ccl_rsrc[] __initconst = {
+	{
+		.flags = IORESOURCE_IRQ,
+		.start = IRQ_MAC_SCSI,
+		.end   = IRQ_MAC_SCSI,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50F10000,
+		.end   = 0x50F11FFF,
+	}, {
+		.flags = IORESOURCE_MEM,
+		.start = 0x50F06000,
+		.end   = 0x50F07FFF,
+	},
+};
+
+static const struct resource mac_pata_quadra_rsrc[] __initconst = {
+	DEFINE_RES_MEM(0x50F1A000, 0x38),
+	DEFINE_RES_MEM(0x50F1A038, 0x04),
+	DEFINE_RES_IRQ(IRQ_NUBUS_F),
+};
+
+static const struct resource mac_pata_pb_rsrc[] __initconst = {
+	DEFINE_RES_MEM(0x50F1A000, 0x38),
+	DEFINE_RES_MEM(0x50F1A038, 0x04),
+	DEFINE_RES_IRQ(IRQ_NUBUS_C),
+};
+
+static const struct resource mac_pata_baboon_rsrc[] __initconst = {
+	DEFINE_RES_MEM(0x50F1A000, 0x38),
+	DEFINE_RES_MEM(0x50F1A038, 0x04),
+	DEFINE_RES_IRQ(IRQ_BABOON_1),
+};
+
+static const struct pata_platform_info mac_pata_data __initconst = {
+	.ioport_shift = 2,
+};
+
+int __init mac_platform_init(void)
+{
+	phys_addr_t swim_base = 0;
+
+	if (!MACH_IS_MAC)
+		return -ENODEV;
+
+	/*
+	 * Serial devices
+	 */
+
+	platform_device_register(&scc_a_pdev);
+	platform_device_register(&scc_b_pdev);
+
+	/*
+	 * Floppy device
+	 */
+
+	switch (macintosh_config->floppy_type) {
+	case MAC_FLOPPY_QUADRA:
+		swim_base = 0x5001E000;
+		break;
+	case MAC_FLOPPY_OLD:
+		swim_base = 0x50016000;
+		break;
+	case MAC_FLOPPY_LC:
+		swim_base = 0x50F16000;
+		break;
+	}
+
+	if (swim_base) {
+		struct resource swim_rsrc = {
+			.flags = IORESOURCE_MEM,
+			.start = swim_base,
+			.end   = swim_base + 0x1FFF,
+		};
+
+		platform_device_register_simple("swim", -1, &swim_rsrc, 1);
+	}
+
+	/*
+	 * SCSI device(s)
+	 */
+
+	switch (macintosh_config->scsi_type) {
+	case MAC_SCSI_QUADRA:
+	case MAC_SCSI_QUADRA3:
+		platform_device_register_simple("mac_esp", 0, NULL, 0);
+		break;
+	case MAC_SCSI_QUADRA2:
+		platform_device_register_simple("mac_esp", 0, NULL, 0);
+		if ((macintosh_config->ident == MAC_MODEL_Q900) ||
+		    (macintosh_config->ident == MAC_MODEL_Q950))
+			platform_device_register_simple("mac_esp", 1, NULL, 0);
+		break;
+	case MAC_SCSI_IIFX:
+		/* Addresses from The Guide to Mac Family Hardware.
+		 * $5000 8000 - $5000 9FFF: SCSI DMA
+		 * $5000 A000 - $5000 BFFF: Alternate SCSI
+		 * $5000 C000 - $5000 DFFF: Alternate SCSI (DMA)
+		 * $5000 E000 - $5000 FFFF: Alternate SCSI (Hsk)
+		 * The A/UX header file sys/uconfig.h says $50F0 8000.
+		 * The "SCSI DMA" custom IC embeds the 53C80 core and
+		 * supports Programmed IO, DMA and PDMA (hardware handshake).
+		 */
+		platform_device_register_simple("mac_scsi", 0,
+			mac_scsi_iifx_rsrc, ARRAY_SIZE(mac_scsi_iifx_rsrc));
+		break;
+	case MAC_SCSI_DUO:
+		/* Addresses from the Duo Dock II Developer Note.
+		 * $FEE0 2000 - $FEE0 3FFF: normal mode
+		 * $FEE0 4000 - $FEE0 5FFF: pseudo DMA without /DRQ
+		 * $FEE0 6000 - $FEE0 7FFF: pseudo DMA with /DRQ
+		 * The NetBSD code indicates that both 5380 chips share
+		 * an IRQ (?) which would need careful handling (see mac_esp).
+		 */
+		platform_device_register_simple("mac_scsi", 1,
+			mac_scsi_duo_rsrc, ARRAY_SIZE(mac_scsi_duo_rsrc));
+		fallthrough;
+	case MAC_SCSI_OLD:
+		/* Addresses from Developer Notes for Duo System,
+		 * PowerBook 180 & 160, 140 & 170, Macintosh IIsi
+		 * and also from The Guide to Mac Family Hardware for
+		 * SE/30, II, IIx, IIcx, IIci.
+		 * $5000 6000 - $5000 7FFF: pseudo-DMA with /DRQ
+		 * $5001 0000 - $5001 1FFF: normal mode
+		 * $5001 2000 - $5001 3FFF: pseudo-DMA without /DRQ
+		 * GMFH says that $5000 0000 - $50FF FFFF "wraps
+		 * $5000 0000 - $5001 FFFF eight times" (!)
+		 * mess.org says IIci and Color Classic do not alias
+		 * I/O address space.
+		 */
+		platform_device_register_simple("mac_scsi", 0,
+			mac_scsi_old_rsrc, ARRAY_SIZE(mac_scsi_old_rsrc));
+		break;
+	case MAC_SCSI_LC:
+		/* Addresses from Mac LC data in Designing Cards & Drivers 3ed.
+		 * Also from the Developer Notes for Classic II, LC III,
+		 * Color Classic and IIvx.
+		 * $50F0 6000 - $50F0 7FFF: SCSI handshake
+		 * $50F1 0000 - $50F1 1FFF: SCSI
+		 * $50F1 2000 - $50F1 3FFF: SCSI DMA
+		 */
+		platform_device_register_simple("mac_scsi", 0,
+			mac_scsi_ccl_rsrc, ARRAY_SIZE(mac_scsi_ccl_rsrc));
+		break;
+	}
+
+	/*
+	 * IDE device
+	 */
+
+	switch (macintosh_config->ide_type) {
+	case MAC_IDE_QUADRA:
+		platform_device_register_resndata(NULL, "pata_platform", -1,
+			mac_pata_quadra_rsrc, ARRAY_SIZE(mac_pata_quadra_rsrc),
+			&mac_pata_data, sizeof(mac_pata_data));
+		break;
+	case MAC_IDE_PB:
+		platform_device_register_resndata(NULL, "pata_platform", -1,
+			mac_pata_pb_rsrc, ARRAY_SIZE(mac_pata_pb_rsrc),
+			&mac_pata_data, sizeof(mac_pata_data));
+		break;
+	case MAC_IDE_BABOON:
+		platform_device_register_resndata(NULL, "pata_platform", -1,
+			mac_pata_baboon_rsrc, ARRAY_SIZE(mac_pata_baboon_rsrc),
+			&mac_pata_data, sizeof(mac_pata_data));
+		break;
+	}
+
+	/*
+	 * Ethernet device
+	 */
+
+	if (macintosh_config->ether_type == MAC_ETHER_SONIC ||
+	    macintosh_config->expansion_type == MAC_EXP_PDS_COMM)
+		platform_device_register_simple("macsonic", -1, NULL, 0);
+
+	if (macintosh_config->expansion_type == MAC_EXP_PDS ||
+	    macintosh_config->expansion_type == MAC_EXP_PDS_COMM)
+		platform_device_register_simple("mac89x0", -1, NULL, 0);
+
+	if (macintosh_config->ether_type == MAC_ETHER_MACE)
+		platform_device_register_simple("macmace", -1, NULL, 0);
+
+	return 0;
+}
+
+arch_initcall(mac_platform_init);
diff --git a/arch/m68k/mac/iop.c b/arch/m68k/mac/iop.c
new file mode 100644
index 000000000..010b3b5ae
--- /dev/null
+++ b/arch/m68k/mac/iop.c
@@ -0,0 +1,588 @@
+/*
+ * I/O Processor (IOP) management
+ * Written and (C) 1999 by Joshua M. Thompson (funaho@jurai.org)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice and this list of conditions.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice and this list of conditions in the documentation and/or other
+ *    materials provided with the distribution.
+ */
+
+/*
+ * The IOP chips are used in the IIfx and some Quadras (900, 950) to manage
+ * serial and ADB. They are actually a 6502 processor and some glue logic.
+ *
+ * 990429 (jmt) - Initial implementation, just enough to knock the SCC IOP
+ *		  into compatible mode so nobody has to fiddle with the
+ *		  Serial Switch control panel anymore.
+ * 990603 (jmt) - Added code to grab the correct ISM IOP interrupt for OSS
+ *		  and non-OSS machines (at least I hope it's correct on a
+ *		  non-OSS machine -- someone with a Q900 or Q950 needs to
+ *		  check this.)
+ * 990605 (jmt) - Rearranged things a bit wrt IOP detection; iop_present is
+ *		  gone, IOP base addresses are now in an array and the
+ *		  globally-visible functions take an IOP number instead of
+ *		  an actual base address.
+ * 990610 (jmt) - Finished the message passing framework and it seems to work.
+ *		  Sending _definitely_ works; my adb-bus.c mods can send
+ *		  messages and receive the MSG_COMPLETED status back from the
+ *		  IOP. The trick now is figuring out the message formats.
+ * 990611 (jmt) - More cleanups. Fixed problem where unclaimed messages on a
+ *		  receive channel were never properly acknowledged. Bracketed
+ *		  the remaining debug printk's with #ifdef's and disabled
+ *		  debugging. I can now type on the console.
+ * 990612 (jmt) - Copyright notice added. Reworked the way replies are handled.
+ *		  It turns out that replies are placed back in the send buffer
+ *		  for that channel; messages on the receive channels are always
+ *		  unsolicited messages from the IOP (and our replies to them
+ *		  should go back in the receive channel.) Also added tracking
+ *		  of device names to the listener functions ala the interrupt
+ *		  handlers.
+ * 990729 (jmt) - Added passing of pt_regs structure to IOP handlers. This is
+ *		  used by the new unified ADB driver.
+ *
+ * TODO:
+ *
+ * o The SCC IOP has to be placed in bypass mode before the serial console
+ *   gets initialized. iop_init() would be one place to do that. Or the
+ *   bootloader could do that. For now, the Serial Switch control panel
+ *   is needed for that -- contrary to the changelog above.
+ * o Something should be periodically checking iop_alive() to make sure the
+ *   IOP hasn't died.
+ * o Some of the IOP manager routines need better error checking and
+ *   return codes. Nothing major, just prettying up.
+ */
+
+/*
+ * -----------------------
+ * IOP Message Passing 101
+ * -----------------------
+ *
+ * The host talks to the IOPs using a rather simple message-passing scheme via
+ * a shared memory area in the IOP RAM. Each IOP has seven "channels"; each
+ * channel is connected to a specific software driver on the IOP. For example
+ * on the SCC IOP there is one channel for each serial port. Each channel has
+ * an incoming and an outgoing message queue with a depth of one.
+ *
+ * A message is 32 bytes plus a state byte for the channel (MSG_IDLE, MSG_NEW,
+ * MSG_RCVD, MSG_COMPLETE). To send a message you copy the message into the
+ * buffer, set the state to MSG_NEW and signal the IOP by setting the IRQ flag
+ * in the IOP control to 1. The IOP will move the state to MSG_RCVD when it
+ * receives the message and then to MSG_COMPLETE when the message processing
+ * has completed. It is the host's responsibility at that point to read the
+ * reply back out of the send channel buffer and reset the channel state back
+ * to MSG_IDLE.
+ *
+ * To receive message from the IOP the same procedure is used except the roles
+ * are reversed. That is, the IOP puts message in the channel with a state of
+ * MSG_NEW, and the host receives the message and move its state to MSG_RCVD
+ * and then to MSG_COMPLETE when processing is completed and the reply (if any)
+ * has been placed back in the receive channel. The IOP will then reset the
+ * channel state to MSG_IDLE.
+ *
+ * Two sets of host interrupts are provided, INT0 and INT1. Both appear on one
+ * interrupt level; they are distinguished by a pair of bits in the IOP status
+ * register. The IOP will raise INT0 when one or more messages in the send
+ * channels have gone to the MSG_COMPLETE state and it will raise INT1 when one
+ * or more messages on the receive channels have gone to the MSG_NEW state.
+ *
+ * Since each channel handles only one message we have to implement a small
+ * interrupt-driven queue on our end. Messages to be sent are placed on the
+ * queue for sending and contain a pointer to an optional callback function.
+ * The handler for a message is called when the message state goes to
+ * MSG_COMPLETE.
+ *
+ * For receiving message we maintain a list of handler functions to call when
+ * a message is received on that IOP/channel combination. The handlers are
+ * called much like an interrupt handler and are passed a copy of the message
+ * from the IOP. The message state will be in MSG_RCVD while the handler runs;
+ * it is the handler's responsibility to call iop_complete_message() when
+ * finished; this function moves the message state to MSG_COMPLETE and signals
+ * the IOP. This two-step process is provided to allow the handler to defer
+ * message processing to a bottom-half handler if the processing will take
+ * a significant amount of time (handlers are called at interrupt time so they
+ * should execute quickly.)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_iop.h>
+
+#ifdef DEBUG
+#define iop_pr_debug(fmt, ...) \
+	printk(KERN_DEBUG "%s: " fmt, __func__, ##__VA_ARGS__)
+#define iop_pr_cont(fmt, ...) \
+	printk(KERN_CONT fmt, ##__VA_ARGS__)
+#else
+#define iop_pr_debug(fmt, ...) \
+	no_printk(KERN_DEBUG "%s: " fmt, __func__, ##__VA_ARGS__)
+#define iop_pr_cont(fmt, ...) \
+	no_printk(KERN_CONT fmt, ##__VA_ARGS__)
+#endif
+
+/* Non-zero if the IOPs are present */
+
+int iop_scc_present, iop_ism_present;
+
+/* structure for tracking channel listeners */
+
+struct listener {
+	const char *devname;
+	void (*handler)(struct iop_msg *);
+};
+
+/*
+ * IOP structures for the two IOPs
+ *
+ * The SCC IOP controls both serial ports (A and B) as its two functions.
+ * The ISM IOP controls the SWIM (floppy drive) and ADB.
+ */
+
+static volatile struct mac_iop *iop_base[NUM_IOPS];
+
+/*
+ * IOP message queues
+ */
+
+static struct iop_msg iop_msg_pool[NUM_IOP_MSGS];
+static struct iop_msg *iop_send_queue[NUM_IOPS][NUM_IOP_CHAN];
+static struct listener iop_listeners[NUM_IOPS][NUM_IOP_CHAN];
+
+irqreturn_t iop_ism_irq(int, void *);
+
+/*
+ * Private access functions
+ */
+
+static __inline__ void iop_loadaddr(volatile struct mac_iop *iop, __u16 addr)
+{
+	iop->ram_addr_lo = addr;
+	iop->ram_addr_hi = addr >> 8;
+}
+
+static __inline__ __u8 iop_readb(volatile struct mac_iop *iop, __u16 addr)
+{
+	iop->ram_addr_lo = addr;
+	iop->ram_addr_hi = addr >> 8;
+	return iop->ram_data;
+}
+
+static __inline__ void iop_writeb(volatile struct mac_iop *iop, __u16 addr, __u8 data)
+{
+	iop->ram_addr_lo = addr;
+	iop->ram_addr_hi = addr >> 8;
+	iop->ram_data = data;
+}
+
+static __inline__ void iop_stop(volatile struct mac_iop *iop)
+{
+	iop->status_ctrl = IOP_AUTOINC;
+}
+
+static __inline__ void iop_start(volatile struct mac_iop *iop)
+{
+	iop->status_ctrl = IOP_RUN | IOP_AUTOINC;
+}
+
+static __inline__ void iop_interrupt(volatile struct mac_iop *iop)
+{
+	iop->status_ctrl = IOP_IRQ | IOP_RUN | IOP_AUTOINC;
+}
+
+static int iop_alive(volatile struct mac_iop *iop)
+{
+	int retval;
+
+	retval = (iop_readb(iop, IOP_ADDR_ALIVE) == 0xFF);
+	iop_writeb(iop, IOP_ADDR_ALIVE, 0);
+	return retval;
+}
+
+static struct iop_msg *iop_get_unused_msg(void)
+{
+	int i;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	for (i = 0 ; i < NUM_IOP_MSGS ; i++) {
+		if (iop_msg_pool[i].status == IOP_MSGSTATUS_UNUSED) {
+			iop_msg_pool[i].status = IOP_MSGSTATUS_WAITING;
+			local_irq_restore(flags);
+			return &iop_msg_pool[i];
+		}
+	}
+
+	local_irq_restore(flags);
+	return NULL;
+}
+
+/*
+ * Initialize the IOPs, if present.
+ */
+
+void __init iop_init(void)
+{
+	int i;
+
+	if (macintosh_config->scc_type == MAC_SCC_IOP) {
+		if (macintosh_config->ident == MAC_MODEL_IIFX)
+			iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_IIFX;
+		else
+			iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_QUADRA;
+		iop_scc_present = 1;
+		pr_debug("SCC IOP detected at %p\n", iop_base[IOP_NUM_SCC]);
+	}
+	if (macintosh_config->adb_type == MAC_ADB_IOP) {
+		if (macintosh_config->ident == MAC_MODEL_IIFX)
+			iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_IIFX;
+		else
+			iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_QUADRA;
+		iop_ism_present = 1;
+		pr_debug("ISM IOP detected at %p\n", iop_base[IOP_NUM_ISM]);
+
+		iop_stop(iop_base[IOP_NUM_ISM]);
+		iop_start(iop_base[IOP_NUM_ISM]);
+		iop_alive(iop_base[IOP_NUM_ISM]); /* clears the alive flag */
+	}
+
+	/* Make the whole pool available and empty the queues */
+
+	for (i = 0 ; i < NUM_IOP_MSGS ; i++) {
+		iop_msg_pool[i].status = IOP_MSGSTATUS_UNUSED;
+	}
+
+	for (i = 0 ; i < NUM_IOP_CHAN ; i++) {
+		iop_send_queue[IOP_NUM_SCC][i] = NULL;
+		iop_send_queue[IOP_NUM_ISM][i] = NULL;
+		iop_listeners[IOP_NUM_SCC][i].devname = NULL;
+		iop_listeners[IOP_NUM_SCC][i].handler = NULL;
+		iop_listeners[IOP_NUM_ISM][i].devname = NULL;
+		iop_listeners[IOP_NUM_ISM][i].handler = NULL;
+	}
+}
+
+/*
+ * Register the interrupt handler for the IOPs.
+ */
+
+void __init iop_register_interrupts(void)
+{
+	if (iop_ism_present) {
+		if (macintosh_config->ident == MAC_MODEL_IIFX) {
+			if (request_irq(IRQ_MAC_ADB, iop_ism_irq, 0,
+					"ISM IOP", (void *)IOP_NUM_ISM))
+				pr_err("Couldn't register ISM IOP interrupt\n");
+		} else {
+			if (request_irq(IRQ_VIA2_0, iop_ism_irq, 0, "ISM IOP",
+					(void *)IOP_NUM_ISM))
+				pr_err("Couldn't register ISM IOP interrupt\n");
+		}
+		if (!iop_alive(iop_base[IOP_NUM_ISM])) {
+			pr_warn("IOP: oh my god, they killed the ISM IOP!\n");
+		} else {
+			pr_warn("IOP: the ISM IOP seems to be alive.\n");
+		}
+	}
+}
+
+/*
+ * Register or unregister a listener for a specific IOP and channel
+ *
+ * If the handler pointer is NULL the current listener (if any) is
+ * unregistered. Otherwise the new listener is registered provided
+ * there is no existing listener registered.
+ */
+
+int iop_listen(uint iop_num, uint chan,
+		void (*handler)(struct iop_msg *),
+		const char *devname)
+{
+	if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return -EINVAL;
+	if (chan >= NUM_IOP_CHAN) return -EINVAL;
+	if (iop_listeners[iop_num][chan].handler && handler) return -EINVAL;
+	iop_listeners[iop_num][chan].devname = devname;
+	iop_listeners[iop_num][chan].handler = handler;
+	return 0;
+}
+
+/*
+ * Complete reception of a message, which just means copying the reply
+ * into the buffer, setting the channel state to MSG_COMPLETE and
+ * notifying the IOP.
+ */
+
+void iop_complete_message(struct iop_msg *msg)
+{
+	int iop_num = msg->iop_num;
+	int chan = msg->channel;
+	int i,offset;
+
+	iop_pr_debug("iop_num %d chan %d reply %*ph\n",
+		     msg->iop_num, msg->channel, IOP_MSG_LEN, msg->reply);
+
+	offset = IOP_ADDR_RECV_MSG + (msg->channel * IOP_MSG_LEN);
+
+	for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) {
+		iop_writeb(iop_base[iop_num], offset, msg->reply[i]);
+	}
+
+	iop_writeb(iop_base[iop_num],
+		   IOP_ADDR_RECV_STATE + chan, IOP_MSG_COMPLETE);
+	iop_interrupt(iop_base[msg->iop_num]);
+
+	msg->status = IOP_MSGSTATUS_UNUSED;
+}
+
+/*
+ * Actually put a message into a send channel buffer
+ */
+
+static void iop_do_send(struct iop_msg *msg)
+{
+	volatile struct mac_iop *iop = iop_base[msg->iop_num];
+	int i,offset;
+
+	iop_pr_debug("iop_num %d chan %d message %*ph\n",
+		     msg->iop_num, msg->channel, IOP_MSG_LEN, msg->message);
+
+	offset = IOP_ADDR_SEND_MSG + (msg->channel * IOP_MSG_LEN);
+
+	for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) {
+		iop_writeb(iop, offset, msg->message[i]);
+	}
+
+	iop_writeb(iop, IOP_ADDR_SEND_STATE + msg->channel, IOP_MSG_NEW);
+
+	iop_interrupt(iop);
+}
+
+/*
+ * Handle sending a message on a channel that
+ * has gone into the IOP_MSG_COMPLETE state.
+ */
+
+static void iop_handle_send(uint iop_num, uint chan)
+{
+	volatile struct mac_iop *iop = iop_base[iop_num];
+	struct iop_msg *msg;
+	int i,offset;
+
+	iop_writeb(iop, IOP_ADDR_SEND_STATE + chan, IOP_MSG_IDLE);
+
+	if (!(msg = iop_send_queue[iop_num][chan])) return;
+
+	msg->status = IOP_MSGSTATUS_COMPLETE;
+	offset = IOP_ADDR_SEND_MSG + (chan * IOP_MSG_LEN);
+	for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) {
+		msg->reply[i] = iop_readb(iop, offset);
+	}
+	iop_pr_debug("iop_num %d chan %d reply %*ph\n",
+		     iop_num, chan, IOP_MSG_LEN, msg->reply);
+
+	if (msg->handler) (*msg->handler)(msg);
+	msg->status = IOP_MSGSTATUS_UNUSED;
+	msg = msg->next;
+	iop_send_queue[iop_num][chan] = msg;
+	if (msg && iop_readb(iop, IOP_ADDR_SEND_STATE + chan) == IOP_MSG_IDLE)
+		iop_do_send(msg);
+}
+
+/*
+ * Handle reception of a message on a channel that has
+ * gone into the IOP_MSG_NEW state.
+ */
+
+static void iop_handle_recv(uint iop_num, uint chan)
+{
+	volatile struct mac_iop *iop = iop_base[iop_num];
+	int i,offset;
+	struct iop_msg *msg;
+
+	msg = iop_get_unused_msg();
+	msg->iop_num = iop_num;
+	msg->channel = chan;
+	msg->status = IOP_MSGSTATUS_UNSOL;
+	msg->handler = iop_listeners[iop_num][chan].handler;
+
+	offset = IOP_ADDR_RECV_MSG + (chan * IOP_MSG_LEN);
+
+	for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) {
+		msg->message[i] = iop_readb(iop, offset);
+	}
+	iop_pr_debug("iop_num %d chan %d message %*ph\n",
+		     iop_num, chan, IOP_MSG_LEN, msg->message);
+
+	iop_writeb(iop, IOP_ADDR_RECV_STATE + chan, IOP_MSG_RCVD);
+
+	/* If there is a listener, call it now. Otherwise complete */
+	/* the message ourselves to avoid possible stalls.         */
+
+	if (msg->handler) {
+		(*msg->handler)(msg);
+	} else {
+		memset(msg->reply, 0, IOP_MSG_LEN);
+		iop_complete_message(msg);
+	}
+}
+
+/*
+ * Send a message
+ *
+ * The message is placed at the end of the send queue. Afterwards if the
+ * channel is idle we force an immediate send of the next message in the
+ * queue.
+ */
+
+int iop_send_message(uint iop_num, uint chan, void *privdata,
+		      uint msg_len, __u8 *msg_data,
+		      void (*handler)(struct iop_msg *))
+{
+	struct iop_msg *msg, *q;
+
+	if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return -EINVAL;
+	if (chan >= NUM_IOP_CHAN) return -EINVAL;
+	if (msg_len > IOP_MSG_LEN) return -EINVAL;
+
+	msg = iop_get_unused_msg();
+	if (!msg) return -ENOMEM;
+
+	msg->next = NULL;
+	msg->status = IOP_MSGSTATUS_WAITING;
+	msg->iop_num = iop_num;
+	msg->channel = chan;
+	msg->caller_priv = privdata;
+	memcpy(msg->message, msg_data, msg_len);
+	msg->handler = handler;
+
+	if (!(q = iop_send_queue[iop_num][chan])) {
+		iop_send_queue[iop_num][chan] = msg;
+		iop_do_send(msg);
+	} else {
+		while (q->next) q = q->next;
+		q->next = msg;
+	}
+
+	return 0;
+}
+
+/*
+ * Upload code to the shared RAM of an IOP.
+ */
+
+void iop_upload_code(uint iop_num, __u8 *code_start,
+		     uint code_len, __u16 shared_ram_start)
+{
+	if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return;
+
+	iop_loadaddr(iop_base[iop_num], shared_ram_start);
+
+	while (code_len--) {
+		iop_base[iop_num]->ram_data = *code_start++;
+	}
+}
+
+/*
+ * Download code from the shared RAM of an IOP.
+ */
+
+void iop_download_code(uint iop_num, __u8 *code_start,
+		       uint code_len, __u16 shared_ram_start)
+{
+	if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return;
+
+	iop_loadaddr(iop_base[iop_num], shared_ram_start);
+
+	while (code_len--) {
+		*code_start++ = iop_base[iop_num]->ram_data;
+	}
+}
+
+/*
+ * Compare the code in the shared RAM of an IOP with a copy in system memory
+ * and return 0 on match or the first nonmatching system memory address on
+ * failure.
+ */
+
+__u8 *iop_compare_code(uint iop_num, __u8 *code_start,
+		       uint code_len, __u16 shared_ram_start)
+{
+	if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return code_start;
+
+	iop_loadaddr(iop_base[iop_num], shared_ram_start);
+
+	while (code_len--) {
+		if (*code_start != iop_base[iop_num]->ram_data) {
+			return code_start;
+		}
+		code_start++;
+	}
+	return (__u8 *) 0;
+}
+
+/*
+ * Handle an ISM IOP interrupt
+ */
+
+irqreturn_t iop_ism_irq(int irq, void *dev_id)
+{
+	uint iop_num = (uint) dev_id;
+	volatile struct mac_iop *iop = iop_base[iop_num];
+	int i,state;
+	u8 events = iop->status_ctrl & (IOP_INT0 | IOP_INT1);
+
+	do {
+		iop_pr_debug("iop_num %d status %02X\n", iop_num,
+			     iop->status_ctrl);
+
+		/* INT0 indicates state change on an outgoing message channel */
+		if (events & IOP_INT0) {
+			iop->status_ctrl = IOP_INT0 | IOP_RUN | IOP_AUTOINC;
+			for (i = 0; i < NUM_IOP_CHAN; i++) {
+				state = iop_readb(iop, IOP_ADDR_SEND_STATE + i);
+				if (state == IOP_MSG_COMPLETE)
+					iop_handle_send(iop_num, i);
+				else if (state != IOP_MSG_IDLE)
+					iop_pr_debug("chan %d send state %02X\n",
+						     i, state);
+			}
+		}
+
+		/* INT1 for incoming messages */
+		if (events & IOP_INT1) {
+			iop->status_ctrl = IOP_INT1 | IOP_RUN | IOP_AUTOINC;
+			for (i = 0; i < NUM_IOP_CHAN; i++) {
+				state = iop_readb(iop, IOP_ADDR_RECV_STATE + i);
+				if (state == IOP_MSG_NEW)
+					iop_handle_recv(iop_num, i);
+				else if (state != IOP_MSG_IDLE)
+					iop_pr_debug("chan %d recv state %02X\n",
+						     i, state);
+			}
+		}
+
+		events = iop->status_ctrl & (IOP_INT0 | IOP_INT1);
+	} while (events);
+
+	return IRQ_HANDLED;
+}
+
+void iop_ism_irq_poll(uint iop_num)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	iop_ism_irq(0, (void *)iop_num);
+	local_irq_restore(flags);
+}
diff --git a/arch/m68k/mac/mac_penguin.S b/arch/m68k/mac/mac_penguin.S
new file mode 100644
index 000000000..359e63bb6
--- /dev/null
+++ b/arch/m68k/mac/mac_penguin.S
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+.byte \
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+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x0F,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xF0,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x0F,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x0F,0xFF,0xFF,0xFF,0x00,0x00,0xF0,0x00,0x00,\
+0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x0F,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0xFF,0xFF,0xF0,0x00,0x00,0xF0,0x00,0x00,\
+0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xF0,0x00,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xF0,\
+0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,\
+0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
+0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
+0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x0F,0xF0,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xF0,0xFF,0xF0,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,\
+0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0x00,0x00,\
+0x0F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0xFF,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0x00,0x00,0x00,\
+0x0F,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x0F,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xF0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0xFF,0xF0,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0x00,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xF0,0x00,0x00,0x0F,0xFF,0x00,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0x00,0x0F,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,\
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00
diff --git a/arch/m68k/mac/macboing.c b/arch/m68k/mac/macboing.c
new file mode 100644
index 000000000..4de6229c7
--- /dev/null
+++ b/arch/m68k/mac/macboing.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	Mac bong noise generator. Note - we ought to put a boingy noise
+ *	here 8)
+ *
+ *	----------------------------------------------------------------------
+ *	16.11.98:
+ *	rewrote some functions, added support for Enhanced ASC (Quadras)
+ *	after the NetBSD asc.c console bell patch by Colin Wood/Frederick Bruck
+ *	Juergen Mellinger (juergen.mellinger@t-online.de)
+ */
+
+#include <linux/sched.h>
+#include <linux/timer.h>
+
+#include <asm/macintosh.h>
+#include <asm/mac_asc.h>
+
+static int mac_asc_inited;
+/*
+ * dumb triangular wave table
+ */
+static __u8 mac_asc_wave_tab[ 0x800 ];
+
+/*
+ * Alan's original sine table; needs interpolating to 0x800
+ * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
+ */
+static const signed char sine_data[] = {
+	0,  39,  75,  103,  121,  127,  121,  103,  75,  39,
+	0, -39, -75, -103, -121, -127, -121, -103, -75, -39
+};
+
+/*
+ * where the ASC hides ...
+ */
+static volatile __u8* mac_asc_regs = ( void* )0x50F14000;
+
+/*
+ * sample rate; is this a good default value?
+ */
+static unsigned long mac_asc_samplespersec = 11050;
+static int mac_bell_duration;
+static unsigned long mac_bell_phase; /* 0..2*Pi -> 0..0x800 (wavetable size) */
+static unsigned long mac_bell_phasepersample;
+
+/*
+ * some function protos
+ */
+static void mac_init_asc( void );
+static void mac_nosound(struct timer_list *);
+static void mac_quadra_start_bell( unsigned int, unsigned int, unsigned int );
+static void mac_quadra_ring_bell(struct timer_list *);
+static void mac_av_start_bell( unsigned int, unsigned int, unsigned int );
+static void ( *mac_special_bell )( unsigned int, unsigned int, unsigned int );
+
+/*
+ * our timer to start/continue/stop the bell
+ */
+static DEFINE_TIMER(mac_sound_timer, mac_nosound);
+
+/*
+ * Sort of initialize the sound chip (called from mac_mksound on the first
+ * beep).
+ */
+static void mac_init_asc( void )
+{
+	int i;
+
+	/*
+	 * do some machine specific initialization
+	 * BTW:
+	 * the NetBSD Quadra patch identifies the Enhanced Apple Sound Chip via
+	 *	mac_asc_regs[ 0x800 ] & 0xF0 != 0
+	 * this makes no sense here, because we have to set the default sample
+	 * rate anyway if we want correct frequencies
+	 */
+	switch ( macintosh_config->ident )
+	{
+		case MAC_MODEL_IIFX:
+			/*
+			 * The IIfx is always special ...
+			 */
+			mac_asc_regs = ( void* )0x50010000;
+			break;
+			/*
+			 * not sure about how correct this list is
+			 * machines with the EASC enhanced apple sound chip
+			 */
+		case MAC_MODEL_Q630:
+		case MAC_MODEL_P475:
+			mac_special_bell = mac_quadra_start_bell;
+			mac_asc_samplespersec = 22150;
+			break;
+		case MAC_MODEL_C660:
+		case MAC_MODEL_Q840:
+			/*
+			 * The Quadra 660AV and 840AV use the "Singer" custom ASIC for sound I/O.
+			 * It appears to be similar to the "AWACS" custom ASIC in the Power Mac
+			 * [678]100.  Because Singer and AWACS may have a similar hardware
+			 * interface, this would imply that the code in drivers/sound/dmasound.c
+			 * for AWACS could be used as a basis for Singer support.  All we have to
+			 * do is figure out how to do DMA on the 660AV/840AV through the PSC and
+			 * figure out where the Singer hardware sits in memory. (I'd look in the
+			 * vicinity of the AWACS location in a Power Mac [678]100 first, or the
+			 * current location of the Apple Sound Chip--ASC--in other Macs.)  The
+			 * Power Mac [678]100 info can be found in MkLinux Mach kernel sources.
+			 *
+			 * Quoted from Apple's Tech Info Library, article number 16405:
+			 *   "Among desktop Macintosh computers, only the 660AV, 840AV, and Power
+			 *   Macintosh models have 16-bit audio input and output capability
+			 *   because of the AT&T DSP3210 hardware circuitry and the 16-bit Singer
+			 *   codec circuitry in the AVs.  The Audio Waveform Amplifier and
+			 *   Converter (AWAC) chip in the Power Macintosh performs the same
+			 *   16-bit I/O functionality.  The PowerBook 500 series computers
+			 *   support 16-bit stereo output, but only mono input."
+			 *
+			 *   Technical Information Library (TIL) article number 16405. 
+			 *   https://support.apple.com/kb/TA32601
+			 *
+			 * --David Kilzer
+			 */
+			mac_special_bell = mac_av_start_bell;
+			break;
+		case MAC_MODEL_Q650:
+		case MAC_MODEL_Q700:
+		case MAC_MODEL_Q800:
+		case MAC_MODEL_Q900:
+		case MAC_MODEL_Q950:
+			/*
+			 * Currently not implemented!
+			 */
+			mac_special_bell = NULL;
+			break;
+		default:
+			/*
+			 * Every switch needs a default
+			 */
+			mac_special_bell = NULL;
+			break;
+	}
+
+	/*
+	 * init the wave table with a simple triangular wave
+	 * A sine wave would sure be nicer here ...
+	 */
+	for ( i = 0; i < 0x400; i++ )
+	{
+		mac_asc_wave_tab[ i ] = i / 4;
+		mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4;
+	}
+	mac_asc_inited = 1;
+}
+
+/*
+ * Called to make noise; current single entry to the boing driver.
+ * Does the job for simple ASC, calls other routines else.
+ * XXX Fixme:
+ * Should be split into asc_mksound, easc_mksound, av_mksound and
+ * function pointer set in mac_init_asc which would be called at
+ * init time.
+ * _This_ is rather ugly ...
+ */
+void mac_mksound( unsigned int freq, unsigned int length )
+{
+	__u32 cfreq = ( freq << 5 ) / 468;
+	unsigned long flags;
+	int i;
+
+	if ( mac_special_bell == NULL )
+	{
+		/* Do nothing */
+		return;
+	}
+
+	if ( !mac_asc_inited )
+		mac_init_asc();
+
+	if ( mac_special_bell )
+	{
+		mac_special_bell( freq, length, 128 );
+		return;
+	}
+
+	if ( freq < 20 || freq > 20000 || length == 0 )
+	{
+		mac_nosound( 0 );
+		return;
+	}
+
+	local_irq_save(flags);
+
+	del_timer( &mac_sound_timer );
+
+	for ( i = 0; i < 0x800; i++ )
+		mac_asc_regs[ i ] = 0;
+	for ( i = 0; i < 0x800; i++ )
+		mac_asc_regs[ i ] = mac_asc_wave_tab[ i ];
+
+	for ( i = 0; i < 8; i++ )
+		*( __u32* )( ( __u32 )mac_asc_regs + ASC_CONTROL + 0x814 + 8 * i ) = cfreq;
+
+	mac_asc_regs[ 0x807 ] = 0;
+	mac_asc_regs[ ASC_VOLUME ] = 128;
+	mac_asc_regs[ 0x805 ] = 0;
+	mac_asc_regs[ 0x80F ] = 0;
+	mac_asc_regs[ ASC_MODE ] = ASC_MODE_SAMPLE;
+	mac_asc_regs[ ASC_ENABLE ] = ASC_ENABLE_SAMPLE;
+
+	mac_sound_timer.expires = jiffies + length;
+	add_timer( &mac_sound_timer );
+
+	local_irq_restore(flags);
+}
+
+/*
+ * regular ASC: stop whining ..
+ */
+static void mac_nosound(struct timer_list *unused)
+{
+	mac_asc_regs[ ASC_ENABLE ] = 0;
+}
+
+/*
+ * EASC entry; init EASC, don't load wavetable, schedule 'start whining'.
+ */
+static void mac_quadra_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
+{
+	unsigned long flags;
+
+	/* if the bell is already ringing, ring longer */
+	if ( mac_bell_duration > 0 )
+	{
+		mac_bell_duration += length;
+		return;
+	}
+
+	mac_bell_duration = length;
+	mac_bell_phase = 0;
+	mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec;
+	/* this is reasonably big for small frequencies */
+
+	local_irq_save(flags);
+
+	/* set the volume */
+	mac_asc_regs[ 0x806 ] = volume;
+
+	/* set up the ASC registers */
+	if ( mac_asc_regs[ 0x801 ] != 1 )
+	{
+		/* select mono mode */
+		mac_asc_regs[ 0x807 ] = 0;
+		/* select sampled sound mode */
+		mac_asc_regs[ 0x802 ] = 0;
+		/* ??? */
+		mac_asc_regs[ 0x801 ] = 1;
+		mac_asc_regs[ 0x803 ] |= 0x80;
+		mac_asc_regs[ 0x803 ] &= 0x7F;
+	}
+
+	mac_sound_timer.function = mac_quadra_ring_bell;
+	mac_sound_timer.expires = jiffies + 1;
+	add_timer( &mac_sound_timer );
+
+	local_irq_restore(flags);
+}
+
+/*
+ * EASC 'start/continue whining'; I'm not sure why the above function didn't
+ * already load the wave table, or at least call this one...
+ * This piece keeps reloading the wave table until done.
+ */
+static void mac_quadra_ring_bell(struct timer_list *unused)
+{
+	int	i, count = mac_asc_samplespersec / HZ;
+	unsigned long flags;
+
+	/*
+	 * we neither want a sound buffer overflow nor underflow, so we need to match
+	 * the number of samples per timer interrupt as exactly as possible.
+	 * using the asc interrupt will give better results in the future
+	 * ...and the possibility to use a real sample (a boingy noise, maybe...)
+	 */
+
+	local_irq_save(flags);
+
+	del_timer( &mac_sound_timer );
+
+	if ( mac_bell_duration-- > 0 )
+	{
+		for ( i = 0; i < count; i++ )
+		{
+			mac_bell_phase += mac_bell_phasepersample;
+			mac_asc_regs[ 0 ] = mac_asc_wave_tab[ mac_bell_phase & ( sizeof( mac_asc_wave_tab ) - 1 ) ];
+		}
+		mac_sound_timer.expires = jiffies + 1;
+		add_timer( &mac_sound_timer );
+	}
+	else
+		mac_asc_regs[ 0x801 ] = 0;
+
+	local_irq_restore(flags);
+}
+
+/*
+ * AV code - please fill in.
+ */
+static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
+{
+}
diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c
new file mode 100644
index 000000000..5cbaf6e94
--- /dev/null
+++ b/arch/m68k/mac/macints.c
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	Macintosh interrupts
+ *
+ * General design:
+ * In contrary to the Amiga and Atari platforms, the Mac hardware seems to
+ * exclusively use the autovector interrupts (the 'generic level0-level7'
+ * interrupts with exception vectors 0x19-0x1f). The following interrupt levels
+ * are used:
+ *	1	- VIA1
+ *		  - slot 0: one second interrupt (CA2)
+ *		  - slot 1: VBlank (CA1)
+ *		  - slot 2: ADB data ready (SR full)
+ *		  - slot 3: ADB data  (CB2)
+ *		  - slot 4: ADB clock (CB1)
+ *		  - slot 5: timer 2
+ *		  - slot 6: timer 1
+ *		  - slot 7: status of IRQ; signals 'any enabled int.'
+ *
+ *	2	- VIA2 or RBV
+ *		  - slot 0: SCSI DRQ (CA2)
+ *		  - slot 1: NUBUS IRQ (CA1) need to read port A to find which
+ *		  - slot 2: /EXP IRQ (only on IIci)
+ *		  - slot 3: SCSI IRQ (CB2)
+ *		  - slot 4: ASC IRQ (CB1)
+ *		  - slot 5: timer 2 (not on IIci)
+ *		  - slot 6: timer 1 (not on IIci)
+ *		  - slot 7: status of IRQ; signals 'any enabled int.'
+ *
+ * Levels 3-6 vary by machine type. For VIA or RBV Macintoshes:
+ *
+ *	3	- unused (?)
+ *
+ *	4	- SCC
+ *
+ *	5	- unused (?)
+ *		  [serial errors or special conditions seem to raise level 6
+ *		  interrupts on some models (LC4xx?)]
+ *
+ *	6	- off switch (?)
+ *
+ * Machines with Quadra-like VIA hardware, except PSC and PMU machines, support
+ * an alternate interrupt mapping, as used by A/UX. It spreads ethernet and
+ * sound out to their own autovector IRQs and gives VIA1 a higher priority:
+ *
+ *	1	- unused (?)
+ *
+ *	3	- on-board SONIC
+ *
+ *	5	- Apple Sound Chip (ASC)
+ *
+ *	6	- VIA1
+ *
+ * For OSS Macintoshes (IIfx only), we apply an interrupt mapping similar to
+ * the Quadra (A/UX) mapping:
+ *
+ *	1	- ISM IOP (ADB)
+ *
+ *	2	- SCSI
+ *
+ *	3	- NuBus
+ *
+ *	4	- SCC IOP
+ *
+ *	6	- VIA1
+ *
+ * For PSC Macintoshes (660AV, 840AV):
+ *
+ *	3	- PSC level 3
+ *		  - slot 0: MACE
+ *
+ *	4	- PSC level 4
+ *		  - slot 1: SCC channel A interrupt
+ *		  - slot 2: SCC channel B interrupt
+ *		  - slot 3: MACE DMA
+ *
+ *	5	- PSC level 5
+ *
+ *	6	- PSC level 6
+ *
+ * Finally we have good 'ole level 7, the non-maskable interrupt:
+ *
+ *	7	- NMI (programmer's switch on the back of some Macs)
+ *		  Also RAM parity error on models which support it (IIc, IIfx?)
+ *
+ * The current interrupt logic looks something like this:
+ *
+ * - We install dispatchers for the autovector interrupts (1-7). These
+ *   dispatchers are responsible for querying the hardware (the
+ *   VIA/RBV/OSS/PSC chips) to determine the actual interrupt source. Using
+ *   this information a machspec interrupt number is generated by placing the
+ *   index of the interrupt hardware into the low three bits and the original
+ *   autovector interrupt number in the upper 5 bits. The handlers for the
+ *   resulting machspec interrupt are then called.
+ *
+ * - Nubus is a special case because its interrupts are hidden behind two
+ *   layers of hardware. Nubus interrupts come in as index 1 on VIA #2,
+ *   which translates to IRQ number 17. In this spot we install _another_
+ *   dispatcher. This dispatcher finds the interrupting slot number (9-F) and
+ *   then forms a new machspec interrupt number as above with the slot number
+ *   minus 9 in the low three bits and the pseudo-level 7 in the upper five
+ *   bits.  The handlers for this new machspec interrupt number are then
+ *   called. This puts Nubus interrupts into the range 56-62.
+ *
+ * - The Baboon interrupts (used on some PowerBooks) are an even more special
+ *   case. They're hidden behind the Nubus slot $C interrupt thus adding a
+ *   third layer of indirection. Why oh why did the Apple engineers do that?
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+
+#include <asm/irq.h>
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_via.h>
+#include <asm/mac_psc.h>
+#include <asm/mac_oss.h>
+#include <asm/mac_iop.h>
+#include <asm/mac_baboon.h>
+#include <asm/hwtest.h>
+#include <asm/irq_regs.h>
+#include <asm/processor.h>
+
+static unsigned int mac_irq_startup(struct irq_data *);
+static void mac_irq_shutdown(struct irq_data *);
+
+static struct irq_chip mac_irq_chip = {
+	.name		= "mac",
+	.irq_enable	= mac_irq_enable,
+	.irq_disable	= mac_irq_disable,
+	.irq_startup	= mac_irq_startup,
+	.irq_shutdown	= mac_irq_shutdown,
+};
+
+static irqreturn_t mac_nmi_handler(int irq, void *dev_id)
+{
+	static volatile int in_nmi;
+
+	if (in_nmi)
+		return IRQ_HANDLED;
+	in_nmi = 1;
+
+	pr_info("Non-Maskable Interrupt\n");
+	show_registers(get_irq_regs());
+
+	in_nmi = 0;
+	return IRQ_HANDLED;
+}
+
+void __init mac_init_IRQ(void)
+{
+	m68k_setup_irq_controller(&mac_irq_chip, handle_simple_irq, IRQ_USER,
+				  NUM_MAC_SOURCES - IRQ_USER);
+
+	/*
+	 * Now register the handlers for the master IRQ handlers
+	 * at levels 1-7. Most of the work is done elsewhere.
+	 */
+
+	if (oss_present)
+		oss_register_interrupts();
+	else
+		via_register_interrupts();
+	if (psc)
+		psc_register_interrupts();
+	if (baboon_present)
+		baboon_register_interrupts();
+	iop_register_interrupts();
+	if (request_irq(IRQ_AUTO_7, mac_nmi_handler, 0, "NMI",
+			mac_nmi_handler))
+		pr_err("Couldn't register NMI\n");
+}
+
+/*
+ *  mac_irq_enable - enable an interrupt source
+ * mac_irq_disable - disable an interrupt source
+ *
+ * These routines are just dispatchers to the VIA/OSS/PSC routines.
+ */
+
+void mac_irq_enable(struct irq_data *data)
+{
+	int irq = data->irq;
+	int irq_src = IRQ_SRC(irq);
+
+	switch(irq_src) {
+	case 1:
+	case 2:
+	case 7:
+		if (oss_present)
+			oss_irq_enable(irq);
+		else
+			via_irq_enable(irq);
+		break;
+	case 3:
+	case 4:
+	case 5:
+	case 6:
+		if (psc)
+			psc_irq_enable(irq);
+		else if (oss_present)
+			oss_irq_enable(irq);
+		break;
+	case 8:
+		if (baboon_present)
+			baboon_irq_enable(irq);
+		break;
+	}
+}
+
+void mac_irq_disable(struct irq_data *data)
+{
+	int irq = data->irq;
+	int irq_src = IRQ_SRC(irq);
+
+	switch(irq_src) {
+	case 1:
+	case 2:
+	case 7:
+		if (oss_present)
+			oss_irq_disable(irq);
+		else
+			via_irq_disable(irq);
+		break;
+	case 3:
+	case 4:
+	case 5:
+	case 6:
+		if (psc)
+			psc_irq_disable(irq);
+		else if (oss_present)
+			oss_irq_disable(irq);
+		break;
+	case 8:
+		if (baboon_present)
+			baboon_irq_disable(irq);
+		break;
+	}
+}
+
+static unsigned int mac_irq_startup(struct irq_data *data)
+{
+	int irq = data->irq;
+
+	if (IRQ_SRC(irq) == 7 && !oss_present)
+		via_nubus_irq_startup(irq);
+	else
+		mac_irq_enable(data);
+
+	return 0;
+}
+
+static void mac_irq_shutdown(struct irq_data *data)
+{
+	int irq = data->irq;
+
+	if (IRQ_SRC(irq) == 7 && !oss_present)
+		via_nubus_irq_shutdown(irq);
+	else
+		mac_irq_disable(data);
+}
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
new file mode 100644
index 000000000..4fab34791
--- /dev/null
+++ b/arch/m68k/mac/misc.c
@@ -0,0 +1,665 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Miscellaneous Mac68K-specific stuff
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/rtc.h>
+#include <linux/mm.h>
+
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <linux/pmu.h>
+
+#include <linux/uaccess.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/macintosh.h>
+#include <asm/mac_via.h>
+#include <asm/mac_oss.h>
+
+#include <asm/machdep.h>
+
+/*
+ * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU
+ * times wrap in 2040. If we need to handle later times, the read_time functions
+ * need to be changed to interpret wrapped times as post-2040.
+ */
+
+#define RTC_OFFSET 2082844800
+
+static void (*rom_reset)(void);
+
+#if IS_ENABLED(CONFIG_NVRAM)
+#ifdef CONFIG_ADB_CUDA
+static unsigned char cuda_pram_read_byte(int offset)
+{
+	struct adb_request req;
+
+	if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
+			 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
+		return 0;
+	while (!req.complete)
+		cuda_poll();
+	return req.reply[3];
+}
+
+static void cuda_pram_write_byte(unsigned char data, int offset)
+{
+	struct adb_request req;
+
+	if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
+			 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
+		return;
+	while (!req.complete)
+		cuda_poll();
+}
+#endif /* CONFIG_ADB_CUDA */
+
+#ifdef CONFIG_ADB_PMU
+static unsigned char pmu_pram_read_byte(int offset)
+{
+	struct adb_request req;
+
+	if (pmu_request(&req, NULL, 3, PMU_READ_XPRAM,
+	                offset & 0xFF, 1) < 0)
+		return 0;
+	pmu_wait_complete(&req);
+
+	return req.reply[0];
+}
+
+static void pmu_pram_write_byte(unsigned char data, int offset)
+{
+	struct adb_request req;
+
+	if (pmu_request(&req, NULL, 4, PMU_WRITE_XPRAM,
+	                offset & 0xFF, 1, data) < 0)
+		return;
+	pmu_wait_complete(&req);
+}
+#endif /* CONFIG_ADB_PMU */
+#endif /* CONFIG_NVRAM */
+
+/*
+ * VIA PRAM/RTC access routines
+ *
+ * Must be called with interrupts disabled and
+ * the RTC should be enabled.
+ */
+
+static __u8 via_rtc_recv(void)
+{
+	int i, reg;
+	__u8 data;
+
+	reg = via1[vBufB] & ~VIA1B_vRTCClk;
+
+	/* Set the RTC data line to be an input. */
+
+	via1[vDirB] &= ~VIA1B_vRTCData;
+
+	/* The bits of the byte come out in MSB order */
+
+	data = 0;
+	for (i = 0 ; i < 8 ; i++) {
+		via1[vBufB] = reg;
+		via1[vBufB] = reg | VIA1B_vRTCClk;
+		data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
+	}
+
+	/* Return RTC data line to output state */
+
+	via1[vDirB] |= VIA1B_vRTCData;
+
+	return data;
+}
+
+static void via_rtc_send(__u8 data)
+{
+	int i, reg, bit;
+
+	reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
+
+	/* The bits of the byte go in in MSB order */
+
+	for (i = 0 ; i < 8 ; i++) {
+		bit = data & 0x80? 1 : 0;
+		data <<= 1;
+		via1[vBufB] = reg | bit;
+		via1[vBufB] = reg | bit | VIA1B_vRTCClk;
+	}
+}
+
+/*
+ * These values can be found in Inside Macintosh vol. III ch. 2
+ * which has a description of the RTC chip in the original Mac.
+ */
+
+#define RTC_FLG_READ            BIT(7)
+#define RTC_FLG_WRITE_PROTECT   BIT(7)
+#define RTC_CMD_READ(r)         (RTC_FLG_READ | (r << 2))
+#define RTC_CMD_WRITE(r)        (r << 2)
+#define RTC_REG_SECONDS_0       0
+#define RTC_REG_SECONDS_1       1
+#define RTC_REG_SECONDS_2       2
+#define RTC_REG_SECONDS_3       3
+#define RTC_REG_WRITE_PROTECT   13
+
+/*
+ * Inside Mac has no information about two-byte RTC commands but
+ * the MAME/MESS source code has the essentials.
+ */
+
+#define RTC_REG_XPRAM           14
+#define RTC_CMD_XPRAM_READ      (RTC_CMD_READ(RTC_REG_XPRAM) << 8)
+#define RTC_CMD_XPRAM_WRITE     (RTC_CMD_WRITE(RTC_REG_XPRAM) << 8)
+#define RTC_CMD_XPRAM_ARG(a)    (((a & 0xE0) << 3) | ((a & 0x1F) << 2))
+
+/*
+ * Execute a VIA PRAM/RTC command. For read commands
+ * data should point to a one-byte buffer for the
+ * resulting data. For write commands it should point
+ * to the data byte to for the command.
+ *
+ * This function disables all interrupts while running.
+ */
+
+static void via_rtc_command(int command, __u8 *data)
+{
+	unsigned long flags;
+	int is_read;
+
+	local_irq_save(flags);
+
+	/* The least significant bits must be 0b01 according to Inside Mac */
+
+	command = (command & ~3) | 1;
+
+	/* Enable the RTC and make sure the strobe line is high */
+
+	via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
+
+	if (command & 0xFF00) {		/* extended (two-byte) command */
+		via_rtc_send((command & 0xFF00) >> 8);
+		via_rtc_send(command & 0xFF);
+		is_read = command & (RTC_FLG_READ << 8);
+	} else {			/* one-byte command */
+		via_rtc_send(command);
+		is_read = command & RTC_FLG_READ;
+	}
+	if (is_read) {
+		*data = via_rtc_recv();
+	} else {
+		via_rtc_send(*data);
+	}
+
+	/* All done, disable the RTC */
+
+	via1[vBufB] |= VIA1B_vRTCEnb;
+
+	local_irq_restore(flags);
+}
+
+#if IS_ENABLED(CONFIG_NVRAM)
+static unsigned char via_pram_read_byte(int offset)
+{
+	unsigned char temp;
+
+	via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), &temp);
+
+	return temp;
+}
+
+static void via_pram_write_byte(unsigned char data, int offset)
+{
+	unsigned char temp;
+
+	temp = 0x55;
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
+
+	temp = data;
+	via_rtc_command(RTC_CMD_XPRAM_WRITE | RTC_CMD_XPRAM_ARG(offset), &temp);
+
+	temp = 0x55 | RTC_FLG_WRITE_PROTECT;
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
+}
+#endif /* CONFIG_NVRAM */
+
+/*
+ * Return the current time in seconds since January 1, 1904.
+ *
+ * This only works on machines with the VIA-based PRAM/RTC, which
+ * is basically any machine with Mac II-style ADB.
+ */
+
+static time64_t via_read_time(void)
+{
+	union {
+		__u8 cdata[4];
+		__u32 idata;
+	} result, last_result;
+	int count = 1;
+
+	via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), &last_result.cdata[3]);
+	via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), &last_result.cdata[2]);
+	via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), &last_result.cdata[1]);
+	via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), &last_result.cdata[0]);
+
+	/*
+	 * The NetBSD guys say to loop until you get the same reading
+	 * twice in a row.
+	 */
+
+	while (1) {
+		via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0),
+		                &result.cdata[3]);
+		via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1),
+		                &result.cdata[2]);
+		via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2),
+		                &result.cdata[1]);
+		via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3),
+		                &result.cdata[0]);
+
+		if (result.idata == last_result.idata)
+			return (time64_t)result.idata - RTC_OFFSET;
+
+		if (++count > 10)
+			break;
+
+		last_result.idata = result.idata;
+	}
+
+	pr_err("%s: failed to read a stable value; got 0x%08x then 0x%08x\n",
+	       __func__, last_result.idata, result.idata);
+
+	return 0;
+}
+
+/*
+ * Set the current time to a number of seconds since January 1, 1904.
+ *
+ * This only works on machines with the VIA-based PRAM/RTC, which
+ * is basically any machine with Mac II-style ADB.
+ */
+
+static void via_set_rtc_time(struct rtc_time *tm)
+{
+	union {
+		__u8 cdata[4];
+		__u32 idata;
+	} data;
+	__u8 temp;
+	time64_t time;
+
+	time = mktime64(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+	                tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	/* Clear the write protect bit */
+
+	temp = 0x55;
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
+
+	data.idata = lower_32_bits(time + RTC_OFFSET);
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_0), &data.cdata[3]);
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_1), &data.cdata[2]);
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_2), &data.cdata[1]);
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_3), &data.cdata[0]);
+
+	/* Set the write protect bit */
+
+	temp = 0x55 | RTC_FLG_WRITE_PROTECT;
+	via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
+}
+
+static void via_shutdown(void)
+{
+	if (rbv_present) {
+		via2[rBufB] &= ~0x04;
+	} else {
+		/* Direction of vDirB is output */
+		via2[vDirB] |= 0x04;
+		/* Send a value of 0 on that line */
+		via2[vBufB] &= ~0x04;
+		mdelay(1000);
+	}
+}
+
+static void oss_shutdown(void)
+{
+	oss->rom_ctrl = OSS_POWEROFF;
+}
+
+#ifdef CONFIG_ADB_CUDA
+static void cuda_restart(void)
+{
+	struct adb_request req;
+
+	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
+		return;
+	while (!req.complete)
+		cuda_poll();
+}
+
+static void cuda_shutdown(void)
+{
+	struct adb_request req;
+
+	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
+		return;
+
+	/* Avoid infinite polling loop when PSU is not under Cuda control */
+	switch (macintosh_config->ident) {
+	case MAC_MODEL_C660:
+	case MAC_MODEL_Q605:
+	case MAC_MODEL_Q605_ACC:
+	case MAC_MODEL_P475:
+	case MAC_MODEL_P475F:
+		return;
+	}
+
+	while (!req.complete)
+		cuda_poll();
+}
+#endif /* CONFIG_ADB_CUDA */
+
+/*
+ *-------------------------------------------------------------------
+ * Below this point are the generic routines; they'll dispatch to the
+ * correct routine for the hardware on which we're running.
+ *-------------------------------------------------------------------
+ */
+
+#if IS_ENABLED(CONFIG_NVRAM)
+unsigned char mac_pram_read_byte(int addr)
+{
+	switch (macintosh_config->adb_type) {
+	case MAC_ADB_IOP:
+	case MAC_ADB_II:
+	case MAC_ADB_PB1:
+		return via_pram_read_byte(addr);
+#ifdef CONFIG_ADB_CUDA
+	case MAC_ADB_EGRET:
+	case MAC_ADB_CUDA:
+		return cuda_pram_read_byte(addr);
+#endif
+#ifdef CONFIG_ADB_PMU
+	case MAC_ADB_PB2:
+		return pmu_pram_read_byte(addr);
+#endif
+	default:
+		return 0xFF;
+	}
+}
+
+void mac_pram_write_byte(unsigned char val, int addr)
+{
+	switch (macintosh_config->adb_type) {
+	case MAC_ADB_IOP:
+	case MAC_ADB_II:
+	case MAC_ADB_PB1:
+		via_pram_write_byte(val, addr);
+		break;
+#ifdef CONFIG_ADB_CUDA
+	case MAC_ADB_EGRET:
+	case MAC_ADB_CUDA:
+		cuda_pram_write_byte(val, addr);
+		break;
+#endif
+#ifdef CONFIG_ADB_PMU
+	case MAC_ADB_PB2:
+		pmu_pram_write_byte(val, addr);
+		break;
+#endif
+	default:
+		break;
+	}
+}
+
+ssize_t mac_pram_get_size(void)
+{
+	return 256;
+}
+#endif /* CONFIG_NVRAM */
+
+void mac_poweroff(void)
+{
+	if (oss_present) {
+		oss_shutdown();
+	} else if (macintosh_config->adb_type == MAC_ADB_II) {
+		via_shutdown();
+#ifdef CONFIG_ADB_CUDA
+	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
+	           macintosh_config->adb_type == MAC_ADB_CUDA) {
+		cuda_shutdown();
+#endif
+#ifdef CONFIG_ADB_PMU
+	} else if (macintosh_config->adb_type == MAC_ADB_PB2) {
+		pmu_shutdown();
+#endif
+	}
+
+	pr_crit("It is now safe to turn off your Macintosh.\n");
+	local_irq_disable();
+	while(1);
+}
+
+void mac_reset(void)
+{
+	if (macintosh_config->adb_type == MAC_ADB_II &&
+	    macintosh_config->ident != MAC_MODEL_SE30) {
+		/* need ROMBASE in booter */
+		/* indeed, plus need to MAP THE ROM !! */
+
+		if (mac_bi_data.rombase == 0)
+			mac_bi_data.rombase = 0x40800000;
+
+		/* works on some */
+		rom_reset = (void *) (mac_bi_data.rombase + 0xa);
+
+		local_irq_disable();
+		rom_reset();
+#ifdef CONFIG_ADB_CUDA
+	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
+	           macintosh_config->adb_type == MAC_ADB_CUDA) {
+		cuda_restart();
+#endif
+#ifdef CONFIG_ADB_PMU
+	} else if (macintosh_config->adb_type == MAC_ADB_PB2) {
+		pmu_restart();
+#endif
+	} else if (CPU_IS_030) {
+
+		/* 030-specific reset routine.  The idea is general, but the
+		 * specific registers to reset are '030-specific.  Until I
+		 * have a non-030 machine, I can't test anything else.
+		 *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
+		 */
+
+		unsigned long rombase = 0x40000000;
+
+		/* make a 1-to-1 mapping, using the transparent tran. reg. */
+		unsigned long virt = (unsigned long) mac_reset;
+		unsigned long phys = virt_to_phys(mac_reset);
+		unsigned long addr = (phys&0xFF000000)|0x8777;
+		unsigned long offset = phys-virt;
+
+		local_irq_disable(); /* lets not screw this up, ok? */
+		__asm__ __volatile__(".chip 68030\n\t"
+				     "pmove %0,%/tt0\n\t"
+				     ".chip 68k"
+				     : : "m" (addr));
+		/* Now jump to physical address so we can disable MMU */
+		__asm__ __volatile__(
+		    ".chip 68030\n\t"
+		    "lea %/pc@(1f),%/a0\n\t"
+		    "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
+		    "addl %0,%/sp\n\t"
+		    "pflusha\n\t"
+		    "jmp %/a0@\n\t" /* jump into physical memory */
+		    "0:.long 0\n\t" /* a constant zero. */
+		    /* OK.  Now reset everything and jump to reset vector. */
+		    "1:\n\t"
+		    "lea %/pc@(0b),%/a0\n\t"
+		    "pmove %/a0@, %/tc\n\t" /* disable mmu */
+		    "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
+		    "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
+		    "movel #0, %/a0\n\t"
+		    "movec %/a0, %/vbr\n\t" /* clear vector base register */
+		    "movec %/a0, %/cacr\n\t" /* disable caches */
+		    "movel #0x0808,%/a0\n\t"
+		    "movec %/a0, %/cacr\n\t" /* flush i&d caches */
+		    "movew #0x2700,%/sr\n\t" /* set up status register */
+		    "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
+		    "movec %/a0, %/isp\n\t"
+		    "movel %1@(0x4),%/a0\n\t" /* load reset vector */
+		    "reset\n\t" /* reset external devices */
+		    "jmp %/a0@\n\t" /* jump to the reset vector */
+		    ".chip 68k"
+		    : : "r" (offset), "a" (rombase) : "a0");
+	}
+
+	/* should never get here */
+	pr_crit("Restart failed. Please restart manually.\n");
+	local_irq_disable();
+	while(1);
+}
+
+/*
+ * This function translates seconds since 1970 into a proper date.
+ *
+ * Algorithm cribbed from glibc2.1, __offtime().
+ *
+ * This is roughly same as rtc_time64_to_tm(), which we should probably
+ * use here, but it's only available when CONFIG_RTC_LIB is enabled.
+ */
+#define SECS_PER_MINUTE (60)
+#define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
+#define SECS_PER_DAY   (SECS_PER_HOUR * 24)
+
+static void unmktime(time64_t time, long offset,
+		     int *yearp, int *monp, int *dayp,
+		     int *hourp, int *minp, int *secp)
+{
+        /* How many days come before each month (0-12).  */
+	static const unsigned short int __mon_yday[2][13] =
+	{
+		/* Normal years.  */
+		{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+		/* Leap years.  */
+		{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+	};
+	int days, rem, y, wday, yday;
+	const unsigned short int *ip;
+
+	days = div_u64_rem(time, SECS_PER_DAY, &rem);
+	rem += offset;
+	while (rem < 0) {
+		rem += SECS_PER_DAY;
+		--days;
+	}
+	while (rem >= SECS_PER_DAY) {
+		rem -= SECS_PER_DAY;
+		++days;
+	}
+	*hourp = rem / SECS_PER_HOUR;
+	rem %= SECS_PER_HOUR;
+	*minp = rem / SECS_PER_MINUTE;
+	*secp = rem % SECS_PER_MINUTE;
+	/* January 1, 1970 was a Thursday. */
+	wday = (4 + days) % 7; /* Day in the week. Not currently used */
+	if (wday < 0) wday += 7;
+	y = 1970;
+
+#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
+#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
+#define __isleap(year)	\
+  ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+
+	while (days < 0 || days >= (__isleap (y) ? 366 : 365))
+	{
+		/* Guess a corrected year, assuming 365 days per year.  */
+		long int yg = y + days / 365 - (days % 365 < 0);
+
+		/* Adjust DAYS and Y to match the guessed year.  */
+		days -= (yg - y) * 365 +
+			LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1);
+		y = yg;
+	}
+	*yearp = y - 1900;
+	yday = days; /* day in the year.  Not currently used. */
+	ip = __mon_yday[__isleap(y)];
+	for (y = 11; days < (long int) ip[y]; --y)
+		continue;
+	days -= ip[y];
+	*monp = y;
+	*dayp = days + 1; /* day in the month */
+	return;
+}
+
+/*
+ * Read/write the hardware clock.
+ */
+
+int mac_hwclk(int op, struct rtc_time *t)
+{
+	time64_t now;
+
+	if (!op) { /* read */
+		switch (macintosh_config->adb_type) {
+		case MAC_ADB_IOP:
+		case MAC_ADB_II:
+		case MAC_ADB_PB1:
+			now = via_read_time();
+			break;
+#ifdef CONFIG_ADB_CUDA
+		case MAC_ADB_EGRET:
+		case MAC_ADB_CUDA:
+			now = cuda_get_time();
+			break;
+#endif
+#ifdef CONFIG_ADB_PMU
+		case MAC_ADB_PB2:
+			now = pmu_get_time();
+			break;
+#endif
+		default:
+			now = 0;
+		}
+
+		t->tm_wday = 0;
+		unmktime(now, 0,
+			 &t->tm_year, &t->tm_mon, &t->tm_mday,
+			 &t->tm_hour, &t->tm_min, &t->tm_sec);
+		pr_debug("%s: read %ptR\n", __func__, t);
+	} else { /* write */
+		pr_debug("%s: tried to write %ptR\n", __func__, t);
+
+		switch (macintosh_config->adb_type) {
+		case MAC_ADB_IOP:
+		case MAC_ADB_II:
+		case MAC_ADB_PB1:
+			via_set_rtc_time(t);
+			break;
+#ifdef CONFIG_ADB_CUDA
+		case MAC_ADB_EGRET:
+		case MAC_ADB_CUDA:
+			cuda_set_rtc_time(t);
+			break;
+#endif
+#ifdef CONFIG_ADB_PMU
+		case MAC_ADB_PB2:
+			pmu_set_rtc_time(t);
+			break;
+#endif
+		default:
+			return -ENODEV;
+		}
+	}
+	return 0;
+}
diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
new file mode 100644
index 000000000..921e6c092
--- /dev/null
+++ b/arch/m68k/mac/oss.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	Operating System Services (OSS) chip handling
+ *	Written by Joshua M. Thompson (funaho@jurai.org)
+ *
+ *
+ *	This chip is used in the IIfx in place of VIA #2. It acts like a fancy
+ *	VIA chip with prorammable interrupt levels.
+ *
+ * 990502 (jmt) - Major rewrite for new interrupt architecture as well as some
+ *		  recent insights into OSS operational details.
+ * 990610 (jmt) - Now taking full advantage of the OSS. Interrupts are mapped
+ *		  to mostly match the A/UX interrupt scheme supported on the
+ *		  VIA side. Also added support for enabling the ISM irq again
+ *		  since we now have a functional IOP manager.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_via.h>
+#include <asm/mac_oss.h>
+
+int oss_present;
+volatile struct mac_oss *oss;
+
+/*
+ * Initialize the OSS
+ */
+
+void __init oss_init(void)
+{
+	int i;
+
+	if (macintosh_config->ident != MAC_MODEL_IIFX)
+		return;
+
+	oss = (struct mac_oss *) OSS_BASE;
+	pr_debug("OSS detected at %p", oss);
+	oss_present = 1;
+
+	/* Disable all interrupts. Unlike a VIA it looks like we    */
+	/* do this by setting the source's interrupt level to zero. */
+
+	for (i = 0; i < OSS_NUM_SOURCES; i++)
+		oss->irq_level[i] = 0;
+}
+
+/*
+ * Handle OSS interrupts.
+ * XXX how do you clear a pending IRQ? is it even necessary?
+ */
+
+static void oss_iopism_irq(struct irq_desc *desc)
+{
+	generic_handle_irq(IRQ_MAC_ADB);
+}
+
+static void oss_scsi_irq(struct irq_desc *desc)
+{
+	generic_handle_irq(IRQ_MAC_SCSI);
+}
+
+static void oss_nubus_irq(struct irq_desc *desc)
+{
+	u16 events, irq_bit;
+	int irq_num;
+
+	events = oss->irq_pending & OSS_IP_NUBUS;
+	irq_num = NUBUS_SOURCE_BASE + 5;
+	irq_bit = OSS_IP_NUBUS5;
+	do {
+		if (events & irq_bit) {
+			events &= ~irq_bit;
+			generic_handle_irq(irq_num);
+		}
+		--irq_num;
+		irq_bit >>= 1;
+	} while (events);
+}
+
+static void oss_iopscc_irq(struct irq_desc *desc)
+{
+	generic_handle_irq(IRQ_MAC_SCC);
+}
+
+/*
+ * Register the OSS and NuBus interrupt dispatchers.
+ *
+ * This IRQ mapping is laid out with two things in mind: first, we try to keep
+ * things on their own levels to avoid having to do double-dispatches. Second,
+ * the levels match as closely as possible the alternate IRQ mapping mode (aka
+ * "A/UX mode") available on some VIA machines.
+ */
+
+#define OSS_IRQLEV_IOPISM    IRQ_AUTO_1
+#define OSS_IRQLEV_SCSI      IRQ_AUTO_2
+#define OSS_IRQLEV_NUBUS     IRQ_AUTO_3
+#define OSS_IRQLEV_IOPSCC    IRQ_AUTO_4
+#define OSS_IRQLEV_VIA1      IRQ_AUTO_6
+
+void __init oss_register_interrupts(void)
+{
+	irq_set_chained_handler(OSS_IRQLEV_IOPISM, oss_iopism_irq);
+	irq_set_chained_handler(OSS_IRQLEV_SCSI,   oss_scsi_irq);
+	irq_set_chained_handler(OSS_IRQLEV_NUBUS,  oss_nubus_irq);
+	irq_set_chained_handler(OSS_IRQLEV_IOPSCC, oss_iopscc_irq);
+	irq_set_chained_handler(OSS_IRQLEV_VIA1,   via1_irq);
+
+	/* OSS_VIA1 gets enabled here because it has no machspec interrupt. */
+	oss->irq_level[OSS_VIA1] = OSS_IRQLEV_VIA1;
+}
+
+/*
+ * Enable an OSS interrupt
+ *
+ * It looks messy but it's rather straightforward. The switch() statement
+ * just maps the machspec interrupt numbers to the right OSS interrupt
+ * source (if the OSS handles that interrupt) and then sets the interrupt
+ * level for that source to nonzero, thus enabling the interrupt.
+ */
+
+void oss_irq_enable(int irq) {
+	switch(irq) {
+		case IRQ_MAC_SCC:
+			oss->irq_level[OSS_IOPSCC] = OSS_IRQLEV_IOPSCC;
+			return;
+		case IRQ_MAC_ADB:
+			oss->irq_level[OSS_IOPISM] = OSS_IRQLEV_IOPISM;
+			return;
+		case IRQ_MAC_SCSI:
+			oss->irq_level[OSS_SCSI] = OSS_IRQLEV_SCSI;
+			return;
+		case IRQ_NUBUS_9:
+		case IRQ_NUBUS_A:
+		case IRQ_NUBUS_B:
+		case IRQ_NUBUS_C:
+		case IRQ_NUBUS_D:
+		case IRQ_NUBUS_E:
+			irq -= NUBUS_SOURCE_BASE;
+			oss->irq_level[irq] = OSS_IRQLEV_NUBUS;
+			return;
+	}
+
+	if (IRQ_SRC(irq) == 1)
+		via_irq_enable(irq);
+}
+
+/*
+ * Disable an OSS interrupt
+ *
+ * Same as above except we set the source's interrupt level to zero,
+ * to disable the interrupt.
+ */
+
+void oss_irq_disable(int irq) {
+	switch(irq) {
+		case IRQ_MAC_SCC:
+			oss->irq_level[OSS_IOPSCC] = 0;
+			return;
+		case IRQ_MAC_ADB:
+			oss->irq_level[OSS_IOPISM] = 0;
+			return;
+		case IRQ_MAC_SCSI:
+			oss->irq_level[OSS_SCSI] = 0;
+			return;
+		case IRQ_NUBUS_9:
+		case IRQ_NUBUS_A:
+		case IRQ_NUBUS_B:
+		case IRQ_NUBUS_C:
+		case IRQ_NUBUS_D:
+		case IRQ_NUBUS_E:
+			irq -= NUBUS_SOURCE_BASE;
+			oss->irq_level[irq] = 0;
+			return;
+	}
+
+	if (IRQ_SRC(irq) == 1)
+		via_irq_disable(irq);
+}
diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
new file mode 100644
index 000000000..0d0965b19
--- /dev/null
+++ b/arch/m68k/mac/psc.c
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *	Apple Peripheral System Controller (PSC)
+ *
+ *	The PSC is used on the AV Macs to control IO functions not handled
+ *	by the VIAs (Ethernet, DSP, SCC).
+ *
+ * TO DO:
+ *
+ * Try to figure out what's going on in pIFR5 and pIFR6. There seem to be
+ * persisant interrupt conditions in those registers and I have no idea what
+ * they are. Granted it doesn't affect since we're not enabling any interrupts
+ * on those levels at the moment, but it would be nice to know. I have a feeling
+ * they aren't actually interrupt lines but data lines (to the DSP?)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/traps.h>
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_psc.h>
+
+#define DEBUG_PSC
+
+volatile __u8 *psc;
+EXPORT_SYMBOL_GPL(psc);
+
+/*
+ * Debugging dump, used in various places to see what's going on.
+ */
+
+static void psc_debug_dump(void)
+{
+	int	i;
+
+	if (!psc)
+		return;
+
+	for (i = 0x30 ; i < 0x70 ; i += 0x10) {
+		printk(KERN_DEBUG "PSC #%d:  IFR = 0x%02X IER = 0x%02X\n",
+			i >> 4,
+			(int) psc_read_byte(pIFRbase + i),
+			(int) psc_read_byte(pIERbase + i));
+	}
+}
+
+/*
+ * Try to kill all DMA channels on the PSC. Not sure how this his
+ * supposed to work; this is code lifted from macmace.c and then
+ * expanded to cover what I think are the other 7 channels.
+ */
+
+static __init void psc_dma_die_die_die(void)
+{
+	int i;
+
+	for (i = 0 ; i < 9 ; i++) {
+		psc_write_word(PSC_CTL_BASE + (i << 4), 0x8800);
+		psc_write_word(PSC_CTL_BASE + (i << 4), 0x1000);
+		psc_write_word(PSC_CMD_BASE + (i << 5), 0x1100);
+		psc_write_word(PSC_CMD_BASE + (i << 5) + 0x10, 0x1100);
+	}
+}
+
+/*
+ * Initialize the PSC. For now this just involves shutting down all
+ * interrupt sources using the IERs.
+ */
+
+void __init psc_init(void)
+{
+	int i;
+
+	if (macintosh_config->ident != MAC_MODEL_C660
+	 && macintosh_config->ident != MAC_MODEL_Q840)
+	{
+		psc = NULL;
+		return;
+	}
+
+	/*
+	 * The PSC is always at the same spot, but using psc
+	 * keeps things consistent with the psc_xxxx functions.
+	 */
+
+	psc = (void *) PSC_BASE;
+
+	pr_debug("PSC detected at %p\n", psc);
+
+	psc_dma_die_die_die();
+
+#ifdef DEBUG_PSC
+	psc_debug_dump();
+#endif
+	/*
+	 * Mask and clear all possible interrupts
+	 */
+
+	for (i = 0x30 ; i < 0x70 ; i += 0x10) {
+		psc_write_byte(pIERbase + i, 0x0F);
+		psc_write_byte(pIFRbase + i, 0x0F);
+	}
+}
+
+/*
+ * PSC interrupt handler. It's a lot like the VIA interrupt handler.
+ */
+
+static void psc_irq(struct irq_desc *desc)
+{
+	unsigned int offset = (unsigned int)irq_desc_get_handler_data(desc);
+	unsigned int irq = irq_desc_get_irq(desc);
+	int pIFR	= pIFRbase + offset;
+	int pIER	= pIERbase + offset;
+	int irq_num;
+	unsigned char irq_bit, events;
+
+	events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF;
+	if (!events)
+		return;
+
+	irq_num = irq << 3;
+	irq_bit = 1;
+	do {
+		if (events & irq_bit) {
+			psc_write_byte(pIFR, irq_bit);
+			generic_handle_irq(irq_num);
+		}
+		irq_num++;
+		irq_bit <<= 1;
+	} while (events >= irq_bit);
+}
+
+/*
+ * Register the PSC interrupt dispatchers for autovector interrupts 3-6.
+ */
+
+void __init psc_register_interrupts(void)
+{
+	irq_set_chained_handler_and_data(IRQ_AUTO_3, psc_irq, (void *)0x30);
+	irq_set_chained_handler_and_data(IRQ_AUTO_4, psc_irq, (void *)0x40);
+	irq_set_chained_handler_and_data(IRQ_AUTO_5, psc_irq, (void *)0x50);
+	irq_set_chained_handler_and_data(IRQ_AUTO_6, psc_irq, (void *)0x60);
+}
+
+void psc_irq_enable(int irq) {
+	int irq_src	= IRQ_SRC(irq);
+	int irq_idx	= IRQ_IDX(irq);
+	int pIER	= pIERbase + (irq_src << 4);
+
+	psc_write_byte(pIER, (1 << irq_idx) | 0x80);
+}
+
+void psc_irq_disable(int irq) {
+	int irq_src	= IRQ_SRC(irq);
+	int irq_idx	= IRQ_IDX(irq);
+	int pIER	= pIERbase + (irq_src << 4);
+
+	psc_write_byte(pIER, 1 << irq_idx);
+}
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
new file mode 100644
index 000000000..3d11d6219
--- /dev/null
+++ b/arch/m68k/mac/via.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	6522 Versatile Interface Adapter (VIA)
+ *
+ *	There are two of these on the Mac II. Some IRQs are vectored
+ *	via them as are assorted bits and bobs - eg RTC, ADB.
+ *
+ * CSA: Motorola seems to have removed documentation on the 6522 from
+ * their web site; try
+ *     http://nerini.drf.com/vectrex/other/text/chips/6522/
+ *     http://www.zymurgy.net/classic/vic20/vicdet1.htm
+ * and
+ *     http://193.23.168.87/mikro_laborversuche/via_iobaustein/via6522_1.html
+ * for info.  A full-text web search on 6522 AND VIA will probably also
+ * net some usefulness. <cananian@alumni.princeton.edu> 20apr1999
+ *
+ * Additional data is here (the SY6522 was used in the Mac II etc):
+ *     http://www.6502.org/documents/datasheets/synertek/synertek_sy6522.pdf
+ *     http://www.6502.org/documents/datasheets/synertek/synertek_sy6522_programming_reference.pdf
+ *
+ * PRAM/RTC access algorithms are from the NetBSD RTC toolkit version 1.08b
+ * by Erik Vogan and adapted to Linux by Joshua M. Thompson (funaho@jurai.org)
+ *
+ */
+
+#include <linux/clocksource.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/mac_via.h>
+#include <asm/mac_psc.h>
+#include <asm/mac_oss.h>
+
+volatile __u8 *via1, *via2;
+int rbv_present;
+int via_alt_mapping;
+EXPORT_SYMBOL(via_alt_mapping);
+static __u8 rbv_clear;
+
+/*
+ * Globals for accessing the VIA chip registers without having to
+ * check if we're hitting a real VIA or an RBV. Normally you could
+ * just hit the combined register (ie, vIER|rIER) but that seems to
+ * break on AV Macs...probably because they actually decode more than
+ * eight address bits. Why can't Apple engineers at least be
+ * _consistently_ lazy?                          - 1999-05-21 (jmt)
+ */
+
+static int gIER,gIFR,gBufA,gBufB;
+
+/*
+ * On Macs with a genuine VIA chip there is no way to mask an individual slot
+ * interrupt. This limitation also seems to apply to VIA clone logic cores in
+ * Quadra-like ASICs. (RBV and OSS machines don't have this limitation.)
+ *
+ * We used to fake it by configuring the relevant VIA pin as an output
+ * (to mask the interrupt) or input (to unmask). That scheme did not work on
+ * (at least) the Quadra 700. A NuBus card's /NMRQ signal is an open-collector
+ * circuit (see Designing Cards and Drivers for Macintosh II and Macintosh SE,
+ * p. 10-11 etc) but VIA outputs are not (see datasheet).
+ *
+ * Driving these outputs high must cause the VIA to source current and the
+ * card to sink current when it asserts /NMRQ. Current will flow but the pin
+ * voltage is uncertain and so the /NMRQ condition may still cause a transition
+ * at the VIA2 CA1 input (which explains the lost interrupts). A side effect
+ * is that a disabled slot IRQ can never be tested as pending or not.
+ *
+ * Driving these outputs low doesn't work either. All the slot /NMRQ lines are
+ * (active low) OR'd together to generate the CA1 (aka "SLOTS") interrupt (see
+ * The Guide To Macintosh Family Hardware, 2nd edition p. 167). If we drive a
+ * disabled /NMRQ line low, the falling edge immediately triggers a CA1
+ * interrupt and all slot interrupts after that will generate no transition
+ * and therefore no interrupt, even after being re-enabled.
+ *
+ * So we make the VIA port A I/O lines inputs and use nubus_disabled to keep
+ * track of their states. When any slot IRQ becomes disabled we mask the CA1
+ * umbrella interrupt. Only when all slot IRQs become enabled do we unmask
+ * the CA1 interrupt. It must remain enabled even when cards have no interrupt
+ * handler registered. Drivers must therefore disable a slot interrupt at the
+ * device before they call free_irq (like shared and autovector interrupts).
+ *
+ * There is also a related problem when MacOS is used to boot Linux. A network
+ * card brought up by a MacOS driver may raise an interrupt while Linux boots.
+ * This can be fatal since it can't be handled until the right driver loads
+ * (if such a driver exists at all). Apparently related to this hardware
+ * limitation, "Designing Cards and Drivers", p. 9-8, says that a slot
+ * interrupt with no driver would crash MacOS (the book was written before
+ * the appearance of Macs with RBV or OSS).
+ */
+
+static u8 nubus_disabled;
+
+void via_debug_dump(void);
+static void via_nubus_init(void);
+
+/*
+ * Initialize the VIAs
+ *
+ * First we figure out where they actually _are_ as well as what type of
+ * VIA we have for VIA2 (it could be a real VIA or an RBV or even an OSS.)
+ * Then we pretty much clear them out and disable all IRQ sources.
+ */
+
+void __init via_init(void)
+{
+	via1 = (void *)VIA1_BASE;
+	pr_debug("VIA1 detected at %p\n", via1);
+
+	if (oss_present) {
+		via2 = NULL;
+		rbv_present = 0;
+	} else {
+		switch (macintosh_config->via_type) {
+
+		/* IIci, IIsi, IIvx, IIvi (P6xx), LC series */
+
+		case MAC_VIA_IICI:
+			via2 = (void *)RBV_BASE;
+			pr_debug("VIA2 (RBV) detected at %p\n", via2);
+			rbv_present = 1;
+			if (macintosh_config->ident == MAC_MODEL_LCIII) {
+				rbv_clear = 0x00;
+			} else {
+				/* on most RBVs (& unlike the VIAs), you   */
+				/* need to set bit 7 when you write to IFR */
+				/* in order for your clear to occur.       */
+				rbv_clear = 0x80;
+			}
+			gIER = rIER;
+			gIFR = rIFR;
+			gBufA = rSIFR;
+			gBufB = rBufB;
+			break;
+
+		/* Quadra and early MacIIs agree on the VIA locations */
+
+		case MAC_VIA_QUADRA:
+		case MAC_VIA_II:
+			via2 = (void *) VIA2_BASE;
+			pr_debug("VIA2 detected at %p\n", via2);
+			rbv_present = 0;
+			rbv_clear = 0x00;
+			gIER = vIER;
+			gIFR = vIFR;
+			gBufA = vBufA;
+			gBufB = vBufB;
+			break;
+
+		default:
+			panic("UNKNOWN VIA TYPE");
+		}
+	}
+
+#ifdef DEBUG_VIA
+	via_debug_dump();
+#endif
+
+	/*
+	 * Shut down all IRQ sources, reset the timers, and
+	 * kill the timer latch on VIA1.
+	 */
+
+	via1[vIER] = 0x7F;
+	via1[vIFR] = 0x7F;
+	via1[vT1CL] = 0;
+	via1[vT1CH] = 0;
+	via1[vT2CL] = 0;
+	via1[vT2CH] = 0;
+	via1[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
+	via1[vACR] &= ~0x03; /* disable port A & B latches */
+
+	/*
+	 * SE/30: disable video IRQ
+	 */
+
+	if (macintosh_config->ident == MAC_MODEL_SE30) {
+		via1[vDirB] |= 0x40;
+		via1[vBufB] |= 0x40;
+	}
+
+	switch (macintosh_config->adb_type) {
+	case MAC_ADB_IOP:
+	case MAC_ADB_II:
+	case MAC_ADB_PB1:
+		/*
+		 * Set the RTC bits to a known state: all lines to outputs and
+		 * RTC disabled (yes that's 0 to enable and 1 to disable).
+		 */
+		via1[vDirB] |= VIA1B_vRTCEnb | VIA1B_vRTCClk | VIA1B_vRTCData;
+		via1[vBufB] |= VIA1B_vRTCEnb | VIA1B_vRTCClk;
+		break;
+	}
+
+	/* Everything below this point is VIA2/RBV only... */
+
+	if (oss_present)
+		return;
+
+	if ((macintosh_config->via_type == MAC_VIA_QUADRA) &&
+	    (macintosh_config->adb_type != MAC_ADB_PB1) &&
+	    (macintosh_config->adb_type != MAC_ADB_PB2) &&
+	    (macintosh_config->ident    != MAC_MODEL_C660) &&
+	    (macintosh_config->ident    != MAC_MODEL_Q840)) {
+		via_alt_mapping = 1;
+		via1[vDirB] |= 0x40;
+		via1[vBufB] &= ~0x40;
+	} else {
+		via_alt_mapping = 0;
+	}
+
+	/*
+	 * Now initialize VIA2. For RBV we just kill all interrupts;
+	 * for a regular VIA we also reset the timers and stuff.
+	 */
+
+	via2[gIER] = 0x7F;
+	via2[gIFR] = 0x7F | rbv_clear;
+	if (!rbv_present) {
+		via2[vT1CL] = 0;
+		via2[vT1CH] = 0;
+		via2[vT2CL] = 0;
+		via2[vT2CH] = 0;
+		via2[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
+		via2[vACR] &= ~0x03; /* disable port A & B latches */
+	}
+
+	via_nubus_init();
+
+	/* Everything below this point is VIA2 only... */
+
+	if (rbv_present)
+		return;
+
+	/*
+	 * Set vPCR for control line interrupts.
+	 *
+	 * CA1 (SLOTS IRQ), CB1 (ASC IRQ): negative edge trigger.
+	 *
+	 * Macs with ESP SCSI have a negative edge triggered SCSI interrupt.
+	 * Testing reveals that PowerBooks do too. However, the SE/30
+	 * schematic diagram shows an active high NCR5380 IRQ line.
+	 */
+
+	pr_debug("VIA2 vPCR is 0x%02X\n", via2[vPCR]);
+	if (macintosh_config->via_type == MAC_VIA_II) {
+		/* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, pos. edge */
+		via2[vPCR] = 0x66;
+	} else {
+		/* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, neg. edge */
+		via2[vPCR] = 0x22;
+	}
+}
+
+/*
+ * Debugging dump, used in various places to see what's going on.
+ */
+
+void via_debug_dump(void)
+{
+	printk(KERN_DEBUG "VIA1: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
+		(uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]);
+	printk(KERN_DEBUG "         PCR = 0x%02X  IFR = 0x%02X IER = 0x%02X\n",
+		(uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]);
+	if (!via2)
+		return;
+	if (rbv_present) {
+		printk(KERN_DEBUG "VIA2:  IFR = 0x%02X  IER = 0x%02X\n",
+			(uint) via2[rIFR], (uint) via2[rIER]);
+		printk(KERN_DEBUG "      SIFR = 0x%02X SIER = 0x%02X\n",
+			(uint) via2[rSIFR], (uint) via2[rSIER]);
+	} else {
+		printk(KERN_DEBUG "VIA2: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
+			(uint) via2[vDirA], (uint) via2[vDirB],
+			(uint) via2[vACR]);
+		printk(KERN_DEBUG "         PCR = 0x%02X  IFR = 0x%02X IER = 0x%02X\n",
+			(uint) via2[vPCR],
+			(uint) via2[vIFR], (uint) via2[vIER]);
+	}
+}
+
+/*
+ * Flush the L2 cache on Macs that have it by flipping
+ * the system into 24-bit mode for an instant.
+ */
+
+void via_l2_flush(int writeback)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	via2[gBufB] &= ~VIA2B_vMode32;
+	via2[gBufB] |= VIA2B_vMode32;
+	local_irq_restore(flags);
+}
+
+/*
+ * Initialize VIA2 for Nubus access
+ */
+
+static void __init via_nubus_init(void)
+{
+	/* unlock nubus transactions */
+
+	if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
+	    (macintosh_config->adb_type != MAC_ADB_PB2)) {
+		/* set the line to be an output on non-RBV machines */
+		if (!rbv_present)
+			via2[vDirB] |= 0x02;
+
+		/* this seems to be an ADB bit on PMU machines */
+		/* according to MkLinux.  -- jmt               */
+		via2[gBufB] |= 0x02;
+	}
+
+	/*
+	 * Disable the slot interrupts. On some hardware that's not possible.
+	 * On some hardware it's unclear what all of these I/O lines do.
+	 */
+
+	switch (macintosh_config->via_type) {
+	case MAC_VIA_II:
+	case MAC_VIA_QUADRA:
+		pr_debug("VIA2 vDirA is 0x%02X\n", via2[vDirA]);
+		break;
+	case MAC_VIA_IICI:
+		/* RBV. Disable all the slot interrupts. SIER works like IER. */
+		via2[rSIER] = 0x7F;
+		break;
+	}
+}
+
+void via_nubus_irq_startup(int irq)
+{
+	int irq_idx = IRQ_IDX(irq);
+
+	switch (macintosh_config->via_type) {
+	case MAC_VIA_II:
+	case MAC_VIA_QUADRA:
+		/* Make the port A line an input. Probably redundant. */
+		if (macintosh_config->via_type == MAC_VIA_II) {
+			/* The top two bits are RAM size outputs. */
+			via2[vDirA] &= 0xC0 | ~(1 << irq_idx);
+		} else {
+			/* Allow NuBus slots 9 through F. */
+			via2[vDirA] &= 0x80 | ~(1 << irq_idx);
+		}
+		fallthrough;
+	case MAC_VIA_IICI:
+		via_irq_enable(irq);
+		break;
+	}
+}
+
+void via_nubus_irq_shutdown(int irq)
+{
+	switch (macintosh_config->via_type) {
+	case MAC_VIA_II:
+	case MAC_VIA_QUADRA:
+		/* Ensure that the umbrella CA1 interrupt remains enabled. */
+		via_irq_enable(irq);
+		break;
+	case MAC_VIA_IICI:
+		via_irq_disable(irq);
+		break;
+	}
+}
+
+/*
+ * The generic VIA interrupt routines (shamelessly stolen from Alan Cox's
+ * via6522.c :-), disable/pending masks added.
+ */
+
+#define VIA_TIMER_1_INT BIT(6)
+
+void via1_irq(struct irq_desc *desc)
+{
+	int irq_num;
+	unsigned char irq_bit, events;
+
+	events = via1[vIFR] & via1[vIER] & 0x7F;
+	if (!events)
+		return;
+
+	irq_num = IRQ_MAC_TIMER_1;
+	irq_bit = VIA_TIMER_1_INT;
+	if (events & irq_bit) {
+		unsigned long flags;
+
+		local_irq_save(flags);
+		via1[vIFR] = irq_bit;
+		generic_handle_irq(irq_num);
+		local_irq_restore(flags);
+
+		events &= ~irq_bit;
+		if (!events)
+			return;
+	}
+
+	irq_num = VIA1_SOURCE_BASE;
+	irq_bit = 1;
+	do {
+		if (events & irq_bit) {
+			via1[vIFR] = irq_bit;
+			generic_handle_irq(irq_num);
+		}
+		++irq_num;
+		irq_bit <<= 1;
+	} while (events >= irq_bit);
+}
+
+static void via2_irq(struct irq_desc *desc)
+{
+	int irq_num;
+	unsigned char irq_bit, events;
+
+	events = via2[gIFR] & via2[gIER] & 0x7F;
+	if (!events)
+		return;
+
+	irq_num = VIA2_SOURCE_BASE;
+	irq_bit = 1;
+	do {
+		if (events & irq_bit) {
+			via2[gIFR] = irq_bit | rbv_clear;
+			generic_handle_irq(irq_num);
+		}
+		++irq_num;
+		irq_bit <<= 1;
+	} while (events >= irq_bit);
+}
+
+/*
+ * Dispatch Nubus interrupts. We are called as a secondary dispatch by the
+ * VIA2 dispatcher as a fast interrupt handler.
+ */
+
+static void via_nubus_irq(struct irq_desc *desc)
+{
+	int slot_irq;
+	unsigned char slot_bit, events;
+
+	events = ~via2[gBufA] & 0x7F;
+	if (rbv_present)
+		events &= via2[rSIER];
+	else
+		events &= ~via2[vDirA];
+	if (!events)
+		return;
+
+	do {
+		slot_irq = IRQ_NUBUS_F;
+		slot_bit = 0x40;
+		do {
+			if (events & slot_bit) {
+				events &= ~slot_bit;
+				generic_handle_irq(slot_irq);
+			}
+			--slot_irq;
+			slot_bit >>= 1;
+		} while (events);
+
+ 		/* clear the CA1 interrupt and make certain there's no more. */
+		via2[gIFR] = 0x02 | rbv_clear;
+		events = ~via2[gBufA] & 0x7F;
+		if (rbv_present)
+			events &= via2[rSIER];
+		else
+			events &= ~via2[vDirA];
+	} while (events);
+}
+
+/*
+ * Register the interrupt dispatchers for VIA or RBV machines only.
+ */
+
+void __init via_register_interrupts(void)
+{
+	if (via_alt_mapping) {
+		/* software interrupt */
+		irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
+		/* via1 interrupt */
+		irq_set_chained_handler(IRQ_AUTO_6, via1_irq);
+	} else {
+		irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
+	}
+	irq_set_chained_handler(IRQ_AUTO_2, via2_irq);
+	irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq);
+}
+
+void via_irq_enable(int irq) {
+	int irq_src	= IRQ_SRC(irq);
+	int irq_idx	= IRQ_IDX(irq);
+
+	if (irq_src == 1) {
+		via1[vIER] = IER_SET_BIT(irq_idx);
+	} else if (irq_src == 2) {
+		if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0)
+			via2[gIER] = IER_SET_BIT(irq_idx);
+	} else if (irq_src == 7) {
+		switch (macintosh_config->via_type) {
+		case MAC_VIA_II:
+		case MAC_VIA_QUADRA:
+			nubus_disabled &= ~(1 << irq_idx);
+			/* Enable the CA1 interrupt when no slot is disabled. */
+			if (!nubus_disabled)
+				via2[gIER] = IER_SET_BIT(1);
+			break;
+		case MAC_VIA_IICI:
+			/* On RBV, enable the slot interrupt.
+			 * SIER works like IER.
+			 */
+			via2[rSIER] = IER_SET_BIT(irq_idx);
+			break;
+		}
+	}
+}
+
+void via_irq_disable(int irq) {
+	int irq_src	= IRQ_SRC(irq);
+	int irq_idx	= IRQ_IDX(irq);
+
+	if (irq_src == 1) {
+		via1[vIER] = IER_CLR_BIT(irq_idx);
+	} else if (irq_src == 2) {
+		via2[gIER] = IER_CLR_BIT(irq_idx);
+	} else if (irq_src == 7) {
+		switch (macintosh_config->via_type) {
+		case MAC_VIA_II:
+		case MAC_VIA_QUADRA:
+			nubus_disabled |= 1 << irq_idx;
+			if (nubus_disabled)
+				via2[gIER] = IER_CLR_BIT(1);
+			break;
+		case MAC_VIA_IICI:
+			via2[rSIER] = IER_CLR_BIT(irq_idx);
+			break;
+		}
+	}
+}
+
+void via1_set_head(int head)
+{
+	if (head == 0)
+		via1[vBufA] &= ~VIA1A_vHeadSel;
+	else
+		via1[vBufA] |= VIA1A_vHeadSel;
+}
+EXPORT_SYMBOL(via1_set_head);
+
+int via2_scsi_drq_pending(void)
+{
+	return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
+}
+EXPORT_SYMBOL(via2_scsi_drq_pending);
+
+/* timer and clock source */
+
+#define VIA_CLOCK_FREQ     783360                /* VIA "phase 2" clock in Hz */
+#define VIA_TIMER_CYCLES   (VIA_CLOCK_FREQ / HZ) /* clock cycles per jiffy */
+
+#define VIA_TC             (VIA_TIMER_CYCLES - 2) /* including 0 and -1 */
+#define VIA_TC_LOW         (VIA_TC & 0xFF)
+#define VIA_TC_HIGH        (VIA_TC >> 8)
+
+static u64 mac_read_clk(struct clocksource *cs);
+
+static struct clocksource mac_clk = {
+	.name   = "via1",
+	.rating = 250,
+	.read   = mac_read_clk,
+	.mask   = CLOCKSOURCE_MASK(32),
+	.flags  = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 clk_total, clk_offset;
+
+static irqreturn_t via_timer_handler(int irq, void *dev_id)
+{
+	clk_total += VIA_TIMER_CYCLES;
+	clk_offset = 0;
+	legacy_timer_tick(1);
+
+	return IRQ_HANDLED;
+}
+
+void __init via_init_clock(void)
+{
+	if (request_irq(IRQ_MAC_TIMER_1, via_timer_handler, IRQF_TIMER, "timer",
+			NULL)) {
+		pr_err("Couldn't register %s interrupt\n", "timer");
+		return;
+	}
+
+	via1[vT1CL] = VIA_TC_LOW;
+	via1[vT1CH] = VIA_TC_HIGH;
+	via1[vACR] |= 0x40;
+
+	clocksource_register_hz(&mac_clk, VIA_CLOCK_FREQ);
+}
+
+static u64 mac_read_clk(struct clocksource *cs)
+{
+	unsigned long flags;
+	u8 count_high;
+	u16 count;
+	u32 ticks;
+
+	/*
+	 * Timer counter wrap-around is detected with the timer interrupt flag
+	 * but reading the counter low byte (vT1CL) would reset the flag.
+	 * Also, accessing both counter registers is essentially a data race.
+	 * These problems are avoided by ignoring the low byte. Clock accuracy
+	 * is 256 times worse (error can reach 0.327 ms) but CPU overhead is
+	 * reduced by avoiding slow VIA register accesses.
+	 */
+
+	local_irq_save(flags);
+	count_high = via1[vT1CH];
+	if (count_high == 0xFF)
+		count_high = 0;
+	if (count_high > 0 && (via1[vIFR] & VIA_TIMER_1_INT))
+		clk_offset = VIA_TIMER_CYCLES;
+	count = count_high << 8;
+	ticks = VIA_TIMER_CYCLES - count;
+	ticks += clk_offset + clk_total;
+	local_irq_restore(flags);
+
+	return ticks;
+}