3 files changed, 222 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/Makefile b/arch/m68k/mvme147/Makefile
new file mode 100644
index 000000000..d78f6f9fa
--- /dev/null
+++ b/arch/m68k/mvme147/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Linux arch/m68k/mvme147 source directory
+#
+
+obj-y		:= config.o
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c
new file mode 100644
index 000000000..3054d3857
--- /dev/null
+++ b/arch/m68k/mvme147/config.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  arch/m68k/mvme147/config.c
+ *
+ *  Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
+ *  Cloned from        Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * Based on:
+ *
+ *  Copyright (C) 1993 Hamish Macdonald
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/clocksource.h>
+#include <linux/console.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/rtc/m48t59.h>
+
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-vme.h>
+#include <asm/byteorder.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+#include <asm/mvme147hw.h>
+#include <asm/config.h>
+
+#include "mvme147.h"
+
+static void mvme147_get_model(char *model);
+static void __init mvme147_sched_init(void);
+extern void mvme147_reset (void);
+
+
+int __init mvme147_parse_bootinfo(const struct bi_record *bi)
+{
+	uint16_t tag = be16_to_cpu(bi->tag);
+	if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
+		return 0;
+	else
+		return 1;
+}
+
+void mvme147_reset(void)
+{
+	pr_info("\r\n\nCalled mvme147_reset\r\n");
+	m147_pcc->watchdog = 0x0a;	/* Clear timer */
+	m147_pcc->watchdog = 0xa5;	/* Enable watchdog - 100ms to reset */
+	while (1)
+		;
+}
+
+static void mvme147_get_model(char *model)
+{
+	sprintf(model, "Motorola MVME147");
+}
+
+/*
+ * This function is called during kernel startup to initialize
+ * the mvme147 IRQ handling routines.
+ */
+
+static void __init mvme147_init_IRQ(void)
+{
+	m68k_setup_user_interrupt(VEC_USER, 192);
+}
+
+void __init config_mvme147(void)
+{
+	mach_sched_init		= mvme147_sched_init;
+	mach_init_IRQ		= mvme147_init_IRQ;
+	mach_reset		= mvme147_reset;
+	mach_get_model		= mvme147_get_model;
+
+	/* Board type is only set by newer versions of vmelilo/tftplilo */
+	if (!vme_brdtype)
+		vme_brdtype = VME_TYPE_MVME147;
+}
+
+static struct resource m48t59_rsrc[] = {
+	DEFINE_RES_MEM(MVME147_RTC_BASE, 0x800),
+};
+
+static struct m48t59_plat_data m48t59_data = {
+	.type = M48T59RTC_TYPE_M48T02,
+	.yy_offset = 70,
+};
+
+static int __init mvme147_platform_init(void)
+{
+	if (!MACH_IS_MVME147)
+		return 0;
+
+	platform_device_register_resndata(NULL, "rtc-m48t59", -1,
+					  m48t59_rsrc, ARRAY_SIZE(m48t59_rsrc),
+					  &m48t59_data, sizeof(m48t59_data));
+	return 0;
+}
+
+arch_initcall(mvme147_platform_init);
+
+static u64 mvme147_read_clk(struct clocksource *cs);
+
+static struct clocksource mvme147_clk = {
+	.name   = "pcc",
+	.rating = 250,
+	.read   = mvme147_read_clk,
+	.mask   = CLOCKSOURCE_MASK(32),
+	.flags  = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 clk_total;
+
+#define PCC_TIMER_CLOCK_FREQ 160000
+#define PCC_TIMER_CYCLES     (PCC_TIMER_CLOCK_FREQ / HZ)
+#define PCC_TIMER_PRELOAD    (0x10000 - PCC_TIMER_CYCLES)
+
+/* Using pcc tick timer 1 */
+
+static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
+			     PCC_TIMER_TIC_EN;
+	m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
+				 PCC_LEVEL_TIMER1;
+	clk_total += PCC_TIMER_CYCLES;
+	legacy_timer_tick(1);
+	local_irq_restore(flags);
+
+	return IRQ_HANDLED;
+}
+
+
+static void __init mvme147_sched_init(void)
+{
+	if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER,
+			"timer 1", NULL))
+		pr_err("Couldn't register timer interrupt\n");
+
+	/* Init the clock with a value */
+	/* The clock counter increments until 0xFFFF then reloads */
+	m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
+	m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
+			     PCC_TIMER_TIC_EN;
+	m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
+				 PCC_LEVEL_TIMER1;
+
+	clocksource_register_hz(&mvme147_clk, PCC_TIMER_CLOCK_FREQ);
+}
+
+static u64 mvme147_read_clk(struct clocksource *cs)
+{
+	unsigned long flags;
+	u8 overflow, tmp;
+	u16 count;
+	u32 ticks;
+
+	local_irq_save(flags);
+	tmp = m147_pcc->t1_cntrl >> 4;
+	count = m147_pcc->t1_count;
+	overflow = m147_pcc->t1_cntrl >> 4;
+	if (overflow != tmp)
+		count = m147_pcc->t1_count;
+	count -= PCC_TIMER_PRELOAD;
+	ticks = count + overflow * PCC_TIMER_CYCLES;
+	ticks += clk_total;
+	local_irq_restore(flags);
+
+	return ticks;
+}
+
+static void scc_delay(void)
+{
+	__asm__ __volatile__ ("nop; nop;");
+}
+
+static void scc_write(char ch)
+{
+	do {
+		scc_delay();
+	} while (!(in_8(M147_SCC_A_ADDR) & BIT(2)));
+	scc_delay();
+	out_8(M147_SCC_A_ADDR, 8);
+	scc_delay();
+	out_8(M147_SCC_A_ADDR, ch);
+}
+
+void mvme147_scc_write(struct console *co, const char *str, unsigned int count)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	while (count--)	{
+		if (*str == '\n')
+			scc_write('\r');
+		scc_write(*str++);
+	}
+	local_irq_restore(flags);
+}
diff --git a/arch/m68k/mvme147/mvme147.h b/arch/m68k/mvme147/mvme147.h
new file mode 100644
index 000000000..140bc98b0
--- /dev/null
+++ b/arch/m68k/mvme147/mvme147.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+struct console;
+
+/* config.c */
+void mvme147_scc_write(struct console *co, const char *str, unsigned int count);