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-rw-r--r--arch/m68k/mvme147/config.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c
new file mode 100644
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+++ b/arch/m68k/mvme147/config.c
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+/*
+ * 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;
+}