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/config.h>
  11 #include <linux/errno.h>
  12 #include <linux/sched.h>
  13 #include <linux/kernel.h>
  14 #include <linux/param.h>
  15 #include <linux/string.h>
  16 #include <linux/mm.h>
  17 #include <linux/interrupt.h>
  18
  19 #include <asm/segment.h>
  20 #include <asm/io.h>
  21 #include <asm/irq.h>
  22
  23 #include <linux/timex.h>
  24
  25 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
  26 #include <asm/regs306x.h>
  27 #define CMFA 6
  28
  29 #define CMIEA 0x40
  30 #define CCLR_CMA 0x08
  31 #define CLK_DIV8192 0x03
  32
  33 #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8192 /* Timer input freq. */
  34
  35 void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *))
  36 {
  37         /* setup 8bit timer ch2 */
  38         ctrl_outb(H8300_TIMER_FREQ / HZ, TCORA2);      /* set interval */
  39         ctrl_outb(0x00, _8TCSR2);                      /* no output */
  40         request_irq(40, timer_int, 0, "timer", 0);
  41         ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR2); /* start count */
  42 }
  43
  44 void platform_timer_eoi(void)
  45 {
  46         *(volatile unsigned char *)_8TCSR2 &= ~(1 << CMFA);
  47 }
  48 #endif
  49
  50 #if defined(CONFIG_H83002) || defined(CONFIG_H83048)
  51 /* FIXME! */
  52 #define TSTR 0x00ffff60
  53 #define TSNC 0x00ffff61
  54 #define TMDR 0x00ffff62
  55 #define TFCR 0x00ffff63
  56 #define TOER 0x00ffff90
  57 #define TOCR 0x00ffff91
  58 /* ITU0 */
  59 #define TCR  0x00ffff64
  60 #define TIOR 0x00ffff65
  61 #define TIER 0x00ffff66
  62 #define TSR  0x00ffff67
  63 #define TCNT 0x00ffff68
  64 #define GRA  0x00ffff6a
  65 #define GRB  0x00ffff6c
  66
  67 #define CCLR_CMGRA 0x20
  68 #define CLK_DIV8 0x03
  69
  70 #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8 /* Timer input freq. */
  71
  72 void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *))
  73 {
  74         *(unsigned short *)GRA= H8300_TIMER_FREQ / HZ;  /* set interval */
  75         *(unsigned short *)TCNT=0;                      /* clear counter */
  76         ctrl_outb(0x80|CCLR_CMGRA|CLK_DIV8, TCR);       /* set ITU0 clock */
  77         ctrl_outb(0x88, TIOR);                          /* no output */
  78         request_irq(26, timer_int, 0, "timer", 0);
  79         ctrl_outb(0xf9, TIER);                          /* compare match GRA interrupt */
  80         ctrl_outb(ctrl_inb(TSNC) & ~0x01, TSNC);        /* ITU0 async */
  81         ctrl_outb(ctrl_inb(TMDR) & ~0x01, TMDR);        /* ITU0 normal mode */
  82         ctrl_outb(ctrl_inb(TSTR) | 0x01, TSTR);         /* ITU0 Start */
  83         return 0;
  84 }
  85
  86 void platform_timer_eoi(void)
  87 {
  88         ctrl_outb(ctrl_inb(TSR) & ~0x01,TSR);
  89 }
  90 #endif
  91
  92 void platform_gettod(int *year, int *mon, int *day, int *hour,
  93                  int *min, int *sec)
  94 {
  95         *year = *mon = *day = *hour = *min = *sec = 0;
  96 }