projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 638b2666 | 1 | /* |
| 1da177e4 LT |
2 | * arch/arm/mach-lh7a40x/time.c |
| 3 | * | |
| 4 | * Copyright (C) 2004 Logic Product Development | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * version 2 as published by the Free Software Foundation. | |
| 9 | * | |
| 10 | */ | |
| 1da177e4 LT |
11 | #include <linux/module.h> |
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/interrupt.h> | |
| c75c625d | 14 | #include <linux/irq.h> |
| 1da177e4 | 15 | #include <linux/time.h> |
| fced80c7 | 16 | #include <linux/io.h> |
| 1da177e4 | 17 | |
| a09e64fb | 18 | #include <mach/hardware.h> |
| 1da177e4 LT |
19 | #include <asm/irq.h> |
| 20 | #include <asm/leds.h> | |
| 21 | ||
| 22 | #include <asm/mach/time.h> | |
| 23 | #include "common.h" | |
| 24 | ||
| 25 | #if HZ < 100 | |
| 26 | # define TIMER_CONTROL TIMER_CONTROL2 | |
| 27 | # define TIMER_LOAD TIMER_LOAD2 | |
| 28 | # define TIMER_CONSTANT (508469/HZ) | |
| 29 | # define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC | TIMER_C_508KHZ) | |
| 30 | # define TIMER_EOI TIMER_EOI2 | |
| 31 | # define TIMER_IRQ IRQ_T2UI | |
| 32 | #else | |
| 33 | # define TIMER_CONTROL TIMER_CONTROL3 | |
| 34 | # define TIMER_LOAD TIMER_LOAD3 | |
| 35 | # define TIMER_CONSTANT (3686400/HZ) | |
| 36 | # define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC) | |
| 37 | # define TIMER_EOI TIMER_EOI3 | |
| 38 | # define TIMER_IRQ IRQ_T3UI | |
| 39 | #endif | |
| 40 | ||
| 41 | static irqreturn_t | |
| 0cd61b68 | 42 | lh7a40x_timer_interrupt(int irq, void *dev_id) |
| 1da177e4 | 43 | { |
| 1da177e4 | 44 | TIMER_EOI = 0; |
| 0cd61b68 | 45 | timer_tick(); |
| 1da177e4 | 46 | |
| 1da177e4 LT |
47 | return IRQ_HANDLED; |
| 48 | } | |
| 49 | ||
| 50 | static struct irqaction lh7a40x_timer_irq = { | |
| 51 | .name = "LHA740x Timer Tick", | |
| b30fabad | 52 | .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, |
| 09b8b5f8 | 53 | .handler = lh7a40x_timer_interrupt, |
| 1da177e4 LT |
54 | }; |
| 55 | ||
| 638b2666 | 56 | static void __init lh7a40x_timer_init (void) |
| 1da177e4 LT |
57 | { |
| 58 | /* Stop/disable all timers */ | |
| 59 | TIMER_CONTROL1 = 0; | |
| 60 | TIMER_CONTROL2 = 0; | |
| 61 | TIMER_CONTROL3 = 0; | |
| 62 | ||
| 63 | setup_irq (TIMER_IRQ, &lh7a40x_timer_irq); | |
| 64 | ||
| 65 | TIMER_LOAD = TIMER_CONSTANT; | |
| 66 | TIMER_CONTROL = TIMER_MODE; | |
| 67 | } | |
| 68 | ||
| 69 | struct sys_timer lh7a40x_timer = { | |
| 70 | .init = &lh7a40x_timer_init, | |
| 71 | }; |