arch/h8300/platform/h8300h/generic/timer.c

   1 /*
   2  *  linux/arch/h8300/platform/h8300h/generic/timer.c
   3  *
   4  *  Yoshinori Sato <ysato@users.sourceforge.jp>
   5  *
   6  *  Platform depend Timer Handler
   7  *
   8  */
   9
  10 #include <linux/errno.h>
  11 #include <linux/sched.h>
  12 #include <linux/kernel.h>
  13 #include <linux/param.h>
  14 #include <linux/string.h>
  15 #include <linux/mm.h>
  16 #include <linux/interrupt.h>
  17
  18 #include <asm/segment.h>
  19 #include <asm/io.h>
  20 #include <asm/irq.h>
  21
  22 #include <linux/timex.h>
  23
  24 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
  25 #include <asm/regs306x.h>
  26 #define CMFA 6
  27
  28 #define CMIEA 0x40
  29 #define CCLR_CMA 0x08
  30 #define CLK_DIV8192 0x03
  31
  32 #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8192 /* Timer input freq. */
  33
  34 void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *))
  35 {
  36         /* setup 8bit timer ch2 */
  37         ctrl_outb(H8300_TIMER_FREQ / HZ, TCORA2);      /* set interval */
  38         ctrl_outb(0x00, _8TCSR2);                      /* no output */
  39         request_irq(40, timer_int, 0, "timer", 0);
  40         ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR2); /* start count */
  41 }
  42
  43 void platform_timer_eoi(void)
  44 {
  45         *(volatile unsigned char *)_8TCSR2 &= ~(1 << CMFA);
  46 }
  47 #endif
  48
  49 #if defined(CONFIG_H83002) || defined(CONFIG_H83048)
  50 /* FIXME! */
  51 #define TSTR 0x00ffff60
  52 #define TSNC 0x00ffff61
  53 #define TMDR 0x00ffff62
  54 #define TFCR 0x00ffff63
  55 #define TOER 0x00ffff90
  56 #define TOCR 0x00ffff91
  57 /* ITU0 */
  58 #define TCR  0x00ffff64
  59 #define TIOR 0x00ffff65
  60 #define TIER 0x00ffff66
  61 #define TSR  0x00ffff67
  62 #define TCNT 0x00ffff68
  63 #define GRA  0x00ffff6a
  64 #define GRB  0x00ffff6c
  65
  66 #define CCLR_CMGRA 0x20
  67 #define CLK_DIV8 0x03
  68
  69 #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8 /* Timer input freq. */
  70
  71 void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *))
  72 {
  73         *(unsigned short *)GRA= H8300_TIMER_FREQ / HZ;  /* set interval */
  74         *(unsigned short *)TCNT=0;                      /* clear counter */
  75         ctrl_outb(0x80|CCLR_CMGRA|CLK_DIV8, TCR);       /* set ITU0 clock */
  76         ctrl_outb(0x88, TIOR);                          /* no output */
  77         request_irq(26, timer_int, 0, "timer", 0);
  78         ctrl_outb(0xf9, TIER);                          /* compare match GRA interrupt */
  79         ctrl_outb(ctrl_inb(TSNC) & ~0x01, TSNC);        /* ITU0 async */
  80         ctrl_outb(ctrl_inb(TMDR) & ~0x01, TMDR);        /* ITU0 normal mode */
  81         ctrl_outb(ctrl_inb(TSTR) | 0x01, TSTR);         /* ITU0 Start */
  82         return 0;
  83 }
  84
  85 void platform_timer_eoi(void)
  86 {
  87         ctrl_outb(ctrl_inb(TSR) & ~0x01,TSR);
  88 }
  89 #endif
  90
  91 void platform_gettod(int *year, int *mon, int *day, int *hour,
  92                  int *min, int *sec)
  93 {
  94         *year = *mon = *day = *hour = *min = *sec = 0;
  95 }