patch-2.2.8 linux/arch/m68k/q40/config.c

• Lines: 426
• Date: Tue May 11 09:57:14 1999
• Orig file: v2.2.7/linux/arch/m68k/q40/config.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.7/linux/arch/m68k/q40/config.c linux/arch/m68k/q40/config.c
@@ -0,0 +1,425 @@
+/*
+ *  arch/m68k/q40/config.c
+ *
+ * originally based on:
+ *
+ *  linux/bvme/config.c
+ *
+ *  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 <stdarg.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/kd.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/major.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/machdep.h>
+#include <asm/q40_master.h>
+#include <asm/keyboard.h>
+
+extern void fd_floppy_eject(void);
+extern void fd_floppy_setup(char *str, int *ints);
+
+extern void q40_process_int (int level, struct pt_regs *regs);
+extern void (*q40_sys_default_handler[]) (int, void *, struct pt_regs *);  /* added just for debugging */
+extern void q40_init_IRQ (void);
+extern void q40_free_irq (unsigned int, void *);
+extern int  q40_get_irq_list (char *);
+extern void q40_enable_irq (unsigned int);
+extern void q40_disable_irq (unsigned int);
+static void q40_get_model(char *model);
+static int  q40_get_hardware_list(char *buffer);
+extern int  q40_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
+extern void q40_sched_init(void (*handler)(int, void *, struct pt_regs *));
+extern int  q40_keyb_init(void);
+extern int  q40_kbdrate (struct kbd_repeat *);
+extern unsigned long q40_gettimeoffset (void);
+extern void q40_gettod (int *year, int *mon, int *day, int *hour,
+                           int *min, int *sec);
+extern int q40_hwclk (int, struct hwclk_time *);
+extern int q40_set_clock_mmss (unsigned long);
+extern void q40_reset (void);
+extern void q40_waitbut(void);
+void q40_set_vectors (void);
+extern void (*kd_mksound)(unsigned int, unsigned int);
+void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/ );
+
+extern char *saved_command_line;
+extern char m68k_debug_device[];
+static void q40_mem_console_write(struct console *co, const char *b,
+				    unsigned int count);
+
+static int ql_ticks=0;
+static int sound_ticks=0;
+
+static unsigned char bcd2bin (unsigned char b);
+static unsigned char bin2bcd (unsigned char b);
+
+static int q40_wait_key(struct console *co){return 0;}
+static struct console q40_console_driver = {
+	"debug",
+	NULL,			/* write */
+	NULL,			/* read */
+	NULL,			/* device */
+	q40_wait_key,		/* wait_key */
+	NULL,			/* unblank */
+	NULL,			/* setup */
+	CON_PRINTBUFFER,
+	-1,
+	0,
+	NULL
+};
+
+
+/* Save tick handler routine pointer, will point to do_timer() in
+ * kernel/sched.c */
+
+/* static void (*tick_handler)(int, void *, struct pt_regs *); */
+
+
+/* early debugging function:*/
+extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
+static int _cpleft;
+
+static void q40_mem_console_write(struct console *co, const char *s,
+				  unsigned int count)
+{
+  char *p=(char *)s;
+
+  if (count<_cpleft)
+    while (count-- >0){
+      *q40_mem_cptr=*p++;
+      q40_mem_cptr+=4;
+      _cpleft--;
+    }
+}
+#if 0
+void printq40(char *str)
+{
+  int l=strlen(str);
+  char *p=q40_mem_cptr;
+
+  while (l-- >0 && _cpleft-- >0)
+    {
+      *p=*str++;
+      p+=4;
+    }
+  q40_mem_cptr=p;
+}
+#endif
+
+#if 0
+int q40_kbdrate (struct kbd_repeat *k)
+{
+	return 0;
+}
+#endif
+
+void q40_reset()
+{
+
+	printk ("\n\n*******************************************\n"
+                     "Called q40_reset : press the RESET button!! \n");
+	printk(     "*******************************************\n");
+
+	while(1)
+		;
+}
+
+static void q40_get_model(char *model)
+{
+    sprintf(model, "Q40");
+}
+
+
+/* No hardware options on Q40? */
+
+static int q40_get_hardware_list(char *buffer)
+{
+    *buffer = '\0';
+    return 0;
+}
+
+
+__initfunc(void config_q40(void))
+{
+    mach_sched_init      = q40_sched_init;           /* ok */
+    /*mach_kbdrate         = q40_kbdrate;*/          /* unneeded ?*/
+    mach_keyb_init       = q40_keyb_init;            /* OK */
+    mach_init_IRQ        = q40_init_IRQ;   
+    mach_gettimeoffset   = q40_gettimeoffset; 
+    mach_gettod  	 = q40_gettod;
+    mach_hwclk           = q40_hwclk; 
+    mach_set_clock_mmss	 = q40_set_clock_mmss;
+/*  mach_mksound         = q40_mksound; */
+    mach_reset		 = q40_reset;           /* use reset button instead !*/
+    mach_free_irq	 = q40_free_irq; 
+    mach_process_int	 = q40_process_int;
+    mach_get_irq_list	 = q40_get_irq_list;
+    mach_request_irq	 = q40_request_irq;
+    enable_irq		 = q40_enable_irq;
+    disable_irq          = q40_disable_irq;
+    mach_default_handler = &q40_sys_default_handler;
+    mach_get_model       = q40_get_model; /* no use..*/
+    mach_get_hardware_list = q40_get_hardware_list; /* no use */
+    kd_mksound             = q40_mksound;
+    /*mach_kbd_leds        = q40kbd_leds;*/
+#ifdef CONFIG_MAGIC_SYSRQ
+    mach_sysrq_key       = 0x54;
+#endif
+    conswitchp = &dummy_con;
+#ifdef CONFIG_BLK_DEV_FD
+    mach_floppy_setup    = fd_floppy_setup;
+    mach_floppy_eject    = fd_floppy_eject;
+    /**/
+#endif
+
+    mach_max_dma_address = 0;   /* no DMA at all */
+
+
+/* userfull for early debuging stages writes kernel messages into SRAM */
+
+    if (!strncmp( m68k_debug_device,"mem",3 ))
+      {
+	/*printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
+	_cpleft=2000-((long)q40_mem_cptr-0xff020000)/4;
+	q40_console_driver.write = q40_mem_console_write;
+	register_console(&q40_console_driver);
+      }
+}
+
+
+int q40_parse_bootinfo(const struct bi_record *rec)
+{
+  return 1;  /* unknown */
+}
+
+#define DAC_LEFT  ((unsigned char *)0xff008000)
+#define DAC_RIGHT ((unsigned char *)0xff008004)
+void q40_mksound(unsigned int hz, unsigned int ticks)
+{
+  /* for now ignore hz, except that hz==0 switches off sound */
+  /* simply alternate the ampl 0-255-0-.. at 200Hz */
+  if (hz==0)
+    {
+      if (sound_ticks)
+	sound_ticks=1; /* atomic - no irq spinlock used */
+
+      *DAC_LEFT=0;
+      *DAC_RIGHT=0;
+
+      return;
+    }
+  /* sound itself is done in q40_timer_int */
+  if (sound_ticks == 0) sound_ticks=1000; /* pretty long beep */
+  sound_ticks=ticks<<1;
+}
+
+static void (*q40_timer_routine)(int, void *, struct pt_regs *);
+
+static void q40_timer_int (int irq, void *dev_id, struct pt_regs *fp)
+{
+#if (HZ==10000)
+    master_outb(-1,SAMPLE_CLEAR_REG);
+#else /* must be 50 or 100 */
+    master_outb(-1,FRAME_CLEAR_REG);
+#endif
+
+#if (HZ==100)
+    ql_ticks = ql_ticks ? 0 : 1;
+    if (sound_ticks)
+      {
+	unsigned char sval=(sound_ticks & 1) ? 0 : 255;
+	sound_ticks--;
+	*DAC_LEFT=sval;
+	*DAC_RIGHT=sval;
+      }
+    if (ql_ticks) return;
+#endif
+    q40_timer_routine(irq, dev_id, fp);
+}
+
+
+void q40_sched_init (void (*timer_routine)(int, void *, struct pt_regs *))
+{
+    int timer_irq;
+
+    q40_timer_routine = timer_routine;
+
+#if (HZ==10000)
+    timer_irq=Q40_IRQ_TIMER;
+#else
+    timer_irq=Q40_IRQ_FRAME;
+#endif
+
+    /*printk("registering sched/timer IRQ %d\n", timer_irq);*/
+
+    if (request_irq(timer_irq, q40_timer_int, 0,
+				"timer", q40_timer_int))
+	panic ("Couldn't register timer int");
+
+#if (HZ==10000)
+    master_outb(SAMPLE_LOW,SAMPLE_RATE_REG);
+    master_outb(-1,SAMPLE_CLEAR_REG);
+    master_outb(1,SAMPLE_ENABLE_REG);
+#else
+    master_outb(-1,FRAME_CLEAR_REG);   /* not necessary ? */
+#if (HZ==100)
+    master_outb( 1,FRAME_RATE_REG);
+#endif
+#endif
+}
+
+
+unsigned long q40_gettimeoffset (void)
+{
+#if (HZ==100)
+    return 5000*(ql_ticks!=0);
+#else
+    return 0;
+#endif
+}
+
+extern void q40_gettod (int *year, int *mon, int *day, int *hour,
+                           int *min, int *sec)
+{
+	RTC_CTRL |= RTC_READ;
+	*year = bcd2bin (RTC_YEAR);
+	*mon = bcd2bin (RTC_MNTH)-1;
+	*day = bcd2bin (RTC_DATE);
+	*hour = bcd2bin (RTC_HOUR);
+	*min = bcd2bin (RTC_MINS);
+	*sec = bcd2bin (RTC_SECS);
+	RTC_CTRL &= ~(RTC_READ);
+
+}
+
+static unsigned char bcd2bin (unsigned char b)
+{
+	return ((b>>4)*10 + (b&15));
+}
+
+static unsigned char bin2bcd (unsigned char b)
+{
+	return (((b/10)*16) + (b%10));
+}
+
+
+/*
+ * Looks like op is non-zero for setting the clock, and zero for
+ * reading the clock.
+ *
+ *  struct hwclk_time {
+ *         unsigned        sec;       0..59
+ *         unsigned        min;       0..59
+ *         unsigned        hour;      0..23
+ *         unsigned        day;       1..31
+ *         unsigned        mon;       0..11
+ *         unsigned        year;      00...
+ *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
+ * };
+ */
+
+int q40_hwclk(int op, struct hwclk_time *t)
+{
+        if (op)
+	{	/* Write.... */
+	        RTC_CTRL |= RTC_WRITE;
+
+		RTC_SECS = bin2bcd(t->sec);
+		RTC_MINS = bin2bcd(t->min);
+		RTC_HOUR = bin2bcd(t->hour);
+		RTC_DATE = bin2bcd(t->day);
+		RTC_MNTH = bin2bcd(t->mon + 1);
+		RTC_YEAR = bin2bcd(t->year%100);
+		if (t->wday >= 0)
+			RTC_DOW = bin2bcd(t->wday+1);
+
+	        RTC_CTRL &= ~(RTC_WRITE);
+	}
+	else
+	{	/* Read....  */
+	  RTC_CTRL |= RTC_READ;
+
+	  t->year = bcd2bin (RTC_YEAR);
+	  t->mon  = bcd2bin (RTC_MNTH)-1;
+	  t->day  = bcd2bin (RTC_DATE);
+	  t->hour = bcd2bin (RTC_HOUR);
+	  t->min  = bcd2bin (RTC_MINS);
+	  t->sec  = bcd2bin (RTC_SECS);
+
+	  RTC_CTRL &= ~(RTC_READ);
+	  
+	  if (t->year < 70)
+	    t->year += 100;
+	  t->wday = bcd2bin(RTC_DOW)-1;
+
+	}
+
+	return 0;
+}
+
+/*
+ * Set the minutes and seconds from seconds value 'nowtime'.  Fail if
+ * clock is out by > 30 minutes.  Logic lifted from atari code.
+ * Algorithm is to wait for the 10ms register to change, and then to
+ * wait a short while, and then set it.
+ */
+
+int q40_set_clock_mmss (unsigned long nowtime)
+{
+	int retval = 0;
+	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
+
+	int rtc_minutes;
+
+
+	rtc_minutes = bcd2bin (RTC_MINS);
+
+	if ((rtc_minutes < real_minutes
+		? real_minutes - rtc_minutes
+			: rtc_minutes - real_minutes) < 30)
+	{	   
+	        RTC_CTRL |= RTC_WRITE;
+		RTC_MINS = bin2bcd(real_minutes);
+		RTC_SECS = bin2bcd(real_seconds);
+		RTC_CTRL &= ~(RTC_WRITE);
+	}
+	else
+		retval = -1;
+
+
+	return retval;
+}
+
+extern void q40kbd_init_hw(void);
+
+int q40_keyb_init (void)
+{
+        q40kbd_init_hw();
+	return 0;
+}
+
+#if 0
+/* dummy to cause */
+void q40_slow_io()
+{
+  return;
+}
+#endif