Adding upstream version 6.6.15.upstream/6.6.15

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

2 files changed, 196 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..4e6218115
--- /dev/null
+++ b/arch/m68k/mvme147/config.c
@@ -0,0 +1,190 @@
+/*
+ *  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
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file README.legal in the main directory of this archive
+ * for more details.
+ */
+
+#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/rtc.h>
+#include <linux/interrupt.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>
+
+
+static void mvme147_get_model(char *model);
+extern void mvme147_sched_init(void);
+extern int mvme147_hwclk (int, struct rtc_time *);
+extern void mvme147_reset (void);
+
+
+static int bcd2int (unsigned char b);
+
+
+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.
+ */
+
+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_hwclk		= mvme147_hwclk;
+	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 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;
+}
+
+
+void 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 int bcd2int (unsigned char b)
+{
+	return ((b>>4)*10 + (b&15));
+}
+
+int mvme147_hwclk(int op, struct rtc_time *t)
+{
+	if (!op) {
+		m147_rtc->ctrl = RTC_READ;
+		t->tm_year = bcd2int (m147_rtc->bcd_year);
+		t->tm_mon  = bcd2int(m147_rtc->bcd_mth) - 1;
+		t->tm_mday = bcd2int (m147_rtc->bcd_dom);
+		t->tm_hour = bcd2int (m147_rtc->bcd_hr);
+		t->tm_min  = bcd2int (m147_rtc->bcd_min);
+		t->tm_sec  = bcd2int (m147_rtc->bcd_sec);
+		m147_rtc->ctrl = 0;
+		if (t->tm_year < 70)
+			t->tm_year += 100;
+	} else {
+		/* FIXME Setting the time is not yet supported */
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}