summaryrefslogtreecommitdiffstats
path: root/arch/m68k/mvme147
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mvme147')
-rw-r--r--arch/m68k/mvme147/147ints.c145
-rw-r--r--arch/m68k/mvme147/Makefile5
-rw-r--r--arch/m68k/mvme147/config.c229
3 files changed, 379 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/147ints.c b/arch/m68k/mvme147/147ints.c
new file mode 100644
index 00000000000..69a744ee35a
--- /dev/null
+++ b/arch/m68k/mvme147/147ints.c
@@ -0,0 +1,145 @@
+/*
+ * arch/m68k/mvme147/147ints.c
+ *
+ * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * based on amiints.c -- Amiga Linux interrupt handling code
+ *
+ * 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/errno.h>
+#include <linux/seq_file.h>
+
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+
+static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp);
+
+/*
+ * This should ideally be 4 elements only, for speed.
+ */
+
+static struct {
+ irqreturn_t (*handler)(int, void *, struct pt_regs *);
+ unsigned long flags;
+ void *dev_id;
+ const char *devname;
+ unsigned count;
+} irq_tab[256];
+
+/*
+ * void mvme147_init_IRQ (void)
+ *
+ * Parameters: None
+ *
+ * Returns: Nothing
+ *
+ * This function is called during kernel startup to initialize
+ * the mvme147 IRQ handling routines.
+ */
+
+void mvme147_init_IRQ (void)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ irq_tab[i].handler = mvme147_defhand;
+ irq_tab[i].flags = IRQ_FLG_STD;
+ irq_tab[i].dev_id = NULL;
+ irq_tab[i].devname = NULL;
+ irq_tab[i].count = 0;
+ }
+}
+
+int mvme147_request_irq(unsigned int irq,
+ irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname, void *dev_id)
+{
+ if (irq > 255) {
+ printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
+ return -ENXIO;
+ }
+ if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
+ if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
+ printk("%s: IRQ %d from %s is not replaceable\n",
+ __FUNCTION__, irq, irq_tab[irq].devname);
+ return -EBUSY;
+ }
+ if (flags & IRQ_FLG_REPLACE) {
+ printk("%s: %s can't replace IRQ %d from %s\n",
+ __FUNCTION__, devname, irq, irq_tab[irq].devname);
+ return -EBUSY;
+ }
+ }
+ irq_tab[irq].handler = handler;
+ irq_tab[irq].flags = flags;
+ irq_tab[irq].dev_id = dev_id;
+ irq_tab[irq].devname = devname;
+ return 0;
+}
+
+void mvme147_free_irq(unsigned int irq, void *dev_id)
+{
+ if (irq > 255) {
+ printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+ if (irq_tab[irq].dev_id != dev_id)
+ printk("%s: Removing probably wrong IRQ %d from %s\n",
+ __FUNCTION__, irq, irq_tab[irq].devname);
+
+ irq_tab[irq].handler = mvme147_defhand;
+ irq_tab[irq].flags = IRQ_FLG_STD;
+ irq_tab[irq].dev_id = NULL;
+ irq_tab[irq].devname = NULL;
+}
+
+irqreturn_t mvme147_process_int (unsigned long vec, struct pt_regs *fp)
+{
+ if (vec > 255) {
+ printk ("mvme147_process_int: Illegal vector %ld\n", vec);
+ return IRQ_NONE;
+ } else {
+ irq_tab[vec].count++;
+ irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
+ return IRQ_HANDLED;
+ }
+}
+
+int show_mvme147_interrupts (struct seq_file *p, void *v)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ if (irq_tab[i].count)
+ seq_printf(p, "Vec 0x%02x: %8d %s\n",
+ i, irq_tab[i].count,
+ irq_tab[i].devname ? irq_tab[i].devname : "free");
+ }
+ return 0;
+}
+
+
+static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp)
+{
+ printk ("Unknown interrupt 0x%02x\n", irq);
+ return IRQ_NONE;
+}
+
+void mvme147_enable_irq (unsigned int irq)
+{
+}
+
+
+void mvme147_disable_irq (unsigned int irq)
+{
+}
+
diff --git a/arch/m68k/mvme147/Makefile b/arch/m68k/mvme147/Makefile
new file mode 100644
index 00000000000..f0153ed3efa
--- /dev/null
+++ b/arch/m68k/mvme147/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Linux arch/m68k/mvme147 source directory
+#
+
+obj-y := config.o 147ints.o
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c
new file mode 100644
index 00000000000..0fcf9720c2f
--- /dev/null
+++ b/arch/m68k/mvme147/config.c
@@ -0,0 +1,229 @@
+/*
+ * 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/console.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/major.h>
+#include <linux/genhd.h>
+#include <linux/rtc.h>
+#include <linux/interrupt.h>
+
+#include <asm/bootinfo.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/rtc.h>
+#include <asm/machdep.h>
+#include <asm/mvme147hw.h>
+
+
+extern irqreturn_t mvme147_process_int (int level, struct pt_regs *regs);
+extern void mvme147_init_IRQ (void);
+extern void mvme147_free_irq (unsigned int, void *);
+extern int show_mvme147_interrupts (struct seq_file *, void *);
+extern void mvme147_enable_irq (unsigned int);
+extern void mvme147_disable_irq (unsigned int);
+static void mvme147_get_model(char *model);
+static int mvme147_get_hardware_list(char *buffer);
+extern int mvme147_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
+extern void mvme147_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
+extern unsigned long mvme147_gettimeoffset (void);
+extern int mvme147_hwclk (int, struct rtc_time *);
+extern int mvme147_set_clock_mmss (unsigned long);
+extern void mvme147_reset (void);
+extern void mvme147_waitbut(void);
+
+
+static int bcd2int (unsigned char b);
+
+/* Save tick handler routine pointer, will point to do_timer() in
+ * kernel/sched.c, called via mvme147_process_int() */
+
+irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
+
+
+int mvme147_parse_bootinfo(const struct bi_record *bi)
+{
+ if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
+ return 0;
+ else
+ return 1;
+}
+
+void mvme147_reset(void)
+{
+ printk ("\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");
+}
+
+
+static int mvme147_get_hardware_list(char *buffer)
+{
+ *buffer = '\0';
+
+ return 0;
+}
+
+
+void __init config_mvme147(void)
+{
+ mach_max_dma_address = 0x01000000;
+ mach_sched_init = mvme147_sched_init;
+ mach_init_IRQ = mvme147_init_IRQ;
+ mach_gettimeoffset = mvme147_gettimeoffset;
+ mach_hwclk = mvme147_hwclk;
+ mach_set_clock_mmss = mvme147_set_clock_mmss;
+ mach_reset = mvme147_reset;
+ mach_free_irq = mvme147_free_irq;
+ mach_process_int = mvme147_process_int;
+ mach_get_irq_list = show_mvme147_interrupts;
+ mach_request_irq = mvme147_request_irq;
+ enable_irq = mvme147_enable_irq;
+ disable_irq = mvme147_disable_irq;
+ mach_get_model = mvme147_get_model;
+ mach_get_hardware_list = mvme147_get_hardware_list;
+
+ /* Board type is only set by newer versions of vmelilo/tftplilo */
+ if (!vme_brdtype)
+ vme_brdtype = VME_TYPE_MVME147;
+}
+
+
+/* Using pcc tick timer 1 */
+
+static irqreturn_t mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp)
+{
+ m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
+ m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
+ return tick_handler(irq, dev_id, fp);
+}
+
+
+void mvme147_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
+{
+ tick_handler = timer_routine;
+ request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
+ IRQ_FLG_REPLACE, "timer 1", NULL);
+
+ /* Init the clock with a value */
+ /* our clock goes off every 6.25us */
+ m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
+ m147_pcc->t1_cntrl = 0x0; /* clear timer */
+ m147_pcc->t1_cntrl = 0x3; /* start timer */
+ m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
+ m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
+}
+
+/* This is always executed with interrupts disabled. */
+/* XXX There are race hazards in this code XXX */
+unsigned long mvme147_gettimeoffset (void)
+{
+ volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
+ unsigned short n;
+
+ n = *cp;
+ while (n != *cp)
+ n = *cp;
+
+ n -= PCC_TIMER_PRELOAD;
+ return (unsigned long)n * 25 / 4;
+}
+
+static int bcd2int (unsigned char b)
+{
+ return ((b>>4)*10 + (b&15));
+}
+
+int mvme147_hwclk(int op, struct rtc_time *t)
+{
+#warning check me!
+ if (!op) {
+ m147_rtc->ctrl = RTC_READ;
+ t->tm_year = bcd2int (m147_rtc->bcd_year);
+ t->tm_mon = bcd2int (m147_rtc->bcd_mth);
+ 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;
+ }
+ return 0;
+}
+
+int mvme147_set_clock_mmss (unsigned long nowtime)
+{
+ return 0;
+}
+
+/*------------------- Serial console stuff ------------------------*/
+
+static void scc_delay (void)
+{
+ int n;
+ volatile int trash;
+
+ for (n = 0; n < 20; n++)
+ trash = n;
+}
+
+static void scc_write (char ch)
+{
+ volatile char *p = (volatile char *)M147_SCC_A_ADDR;
+
+ do {
+ scc_delay();
+ }
+ while (!(*p & 4));
+ scc_delay();
+ *p = 8;
+ scc_delay();
+ *p = ch;
+}
+
+
+void m147_scc_write (struct console *co, const char *str, unsigned count)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ while (count--)
+ {
+ if (*str == '\n')
+ scc_write ('\r');
+ scc_write (*str++);
+ }
+ local_irq_restore(flags);
+}
+
+void mvme147_init_console_port (struct console *co, int cflag)
+{
+ co->write = m147_scc_write;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 17:06:35 +0000