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author | Paul Mundt <lethal@linux-sh.org> | 2008-10-20 11:17:52 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-10-20 11:17:52 +0900 |
commit | 4cb40f795af36b3deb743f6ccf6c3fd542c61c8d (patch) | |
tree | db3d7519932549bf528f5b8e4cb8350356cd544d /arch/h8300/kernel/timer/timer16.c | |
parent | 79ed2a9216dd3cc35c4f2c5dbaddadb195af83ac (diff) | |
parent | 0cfd81031a26717fe14380d18275f8e217571615 (diff) | |
download | kernel-crypto-4cb40f795af36b3deb743f6ccf6c3fd542c61c8d.tar.gz kernel-crypto-4cb40f795af36b3deb743f6ccf6c3fd542c61c8d.tar.xz kernel-crypto-4cb40f795af36b3deb743f6ccf6c3fd542c61c8d.zip |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
Documentation/kernel-parameters.txt
arch/sh/include/asm/elf.h
Diffstat (limited to 'arch/h8300/kernel/timer/timer16.c')
-rw-r--r-- | arch/h8300/kernel/timer/timer16.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/h8300/kernel/timer/timer16.c b/arch/h8300/kernel/timer/timer16.c new file mode 100644 index 00000000000..e14271b7211 --- /dev/null +++ b/arch/h8300/kernel/timer/timer16.c @@ -0,0 +1,78 @@ +/* + * linux/arch/h8300/kernel/timer/timer16.c + * + * Yoshinori Sato <ysato@users.sourcefoge.jp> + * + * 16bit Timer Handler + * + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/timex.h> + +#include <asm/segment.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/regs306x.h> + +/* 16bit timer */ +#if CONFIG_H8300_TIMER16_CH == 0 +#define _16BASE 0xffff78 +#define _16IRQ 24 +#elif CONFIG_H8300_TIMER16_CH == 1 +#define _16BASE 0xffff80 +#define _16IRQ 28 +#elif CONFIG_H8300_TIMER16_CH == 2 +#define _16BASE 0xffff88 +#define _16IRQ 32 +#else +#error Unknown timer channel. +#endif + +#define TCR 0 +#define TIOR 1 +#define TCNT 2 +#define GRA 4 +#define GRB 6 + +#define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*10000 /* Timer input freq. */ + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + h8300_timer_tick(); + ctrl_bclr(CONFIG_H8300_TIMER16_CH, TISRA); + return IRQ_HANDLED; +} + +static struct irqaction timer16_irq = { + .name = "timer-16", + .handler = timer_interrupt, + .flags = IRQF_DISABLED | IRQF_TIMER, + .mask = CPU_MASK_NONE, +}; + +static const int __initdata divide_rate[] = {1, 2, 4, 8}; + +void __init h8300_timer_setup(void) +{ + unsigned int div; + unsigned int cnt; + + calc_param(cnt, div, divide_rate, 0x10000); + + setup_irq(_16IRQ, &timer16_irq); + + /* initalize timer */ + ctrl_outb(0, TSTR); + ctrl_outb(CCLR0 | div, _16BASE + TCR); + ctrl_outw(cnt, _16BASE + GRA); + ctrl_bset(4 + CONFIG_H8300_TIMER16_CH, TISRA); + ctrl_bset(CONFIG_H8300_TIMER16_CH, TSTR); +} |