Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/h8300/platform/h8300h/h8max/timer.c |
| 3 | * |
| 4 | * Yoshinori Sato <ysato@users.sourcefoge.jp> |
| 5 | * |
| 6 | * Platform depend Timer Handler |
| 7 | * |
| 8 | */ |
| 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | #include <linux/init.h> |
| 18 | #include <linux/timex.h> |
| 19 | |
| 20 | #include <asm/segment.h> |
| 21 | #include <asm/io.h> |
| 22 | #include <asm/irq.h> |
| 23 | #include <asm/regs306x.h> |
| 24 | |
| 25 | #define CMFA 6 |
| 26 | |
| 27 | #define CMIEA 0x40 |
| 28 | #define CCLR_CMA 0x08 |
| 29 | #define CLK_DIV8192 0x03 |
| 30 | |
| 31 | #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8192 /* Timer input freq. */ |
| 32 | |
| 33 | void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *)) |
| 34 | { |
| 35 | /* setup 8bit timer ch2 */ |
| 36 | ctrl_outb(H8300_TIMER_FREQ / HZ, TCORA2); /* set interval */ |
| 37 | ctrl_outb(0x00, _8TCSR2); /* no output */ |
| 38 | request_irq(40, timer_int, 0, "timer", 0); |
| 39 | ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR2); /* start count */ |
| 40 | } |
| 41 | |
| 42 | void platform_timer_eoi(void) |
| 43 | { |
| 44 | *(volatile unsigned char *)_8TCSR2 &= ~(1 << CMFA); |
| 45 | } |
| 46 | |
| 47 | void platform_gettod(int *year, int *mon, int *day, int *hour, |
| 48 | int *min, int *sec) |
| 49 | { |
| 50 | *year = *mon = *day = *hour = *min = *sec = 0; |
| 51 | } |
| 52 | |