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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/h8300/kernel/timer/itu.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/h8300/kernel/timer/itu.c')
-rw-r--r-- | arch/h8300/kernel/timer/itu.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/h8300/kernel/timer/itu.c b/arch/h8300/kernel/timer/itu.c new file mode 100644 index 00000000..a2ae5e95 --- /dev/null +++ b/arch/h8300/kernel/timer/itu.c @@ -0,0 +1,82 @@ +/* + * linux/arch/h8300/kernel/timer/itu.c + * + * Yoshinori Sato <ysato@users.sourcefoge.jp> + * + * ITU 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> + +#if CONFIG_H8300_ITU_CH == 0 +#define ITUBASE 0xffff64 +#define ITUIRQ 24 +#elif CONFIG_H8300_ITU_CH == 1 +#define ITUBASE 0xffff6e +#define ITUIRQ 28 +#elif CONFIG_H8300_ITU_CH == 2 +#define ITUBASE 0xffff78 +#define ITUIRQ 32 +#elif CONFIG_H8300_ITU_CH == 3 +#define ITUBASE 0xffff82 +#define ITUIRQ 36 +#elif CONFIG_H8300_ITU_CH == 4 +#define ITUBASE 0xffff92 +#define ITUIRQ 40 +#else +#error Unknown timer channel. +#endif + +#define TCR 0 +#define TIOR 1 +#define TIER 2 +#define TSR 3 +#define TCNT 4 +#define GRA 6 +#define GRB 8 + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + h8300_timer_tick(); + ctrl_bclr(IMFA, ITUBASE + TSR); + return IRQ_HANDLED; +} + +static struct irqaction itu_irq = { + .name = "itu", + .handler = timer_interrupt, + .flags = IRQF_DISABLED | IRQF_TIMER, +}; + +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(ITUIRQ, &itu_irq); + + /* initialize timer */ + ctrl_outb(0, TSTR); + ctrl_outb(CCLR0 | div, ITUBASE + TCR); + ctrl_outb(0x01, ITUBASE + TIER); + ctrl_outw(cnt, ITUBASE + GRA); + ctrl_bset(CONFIG_H8300_ITU_CH, TSTR); +} |