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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-h720x/cpu-h7201.c | |
3 | * | |
4 | * Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de> | |
5 | * 2003 Robert Schwebel <r.schwebel@pengutronix.de> | |
6 | * 2004 Sascha Hauer <s.hauer@pengutronix.de> | |
7 | * | |
8 | * processor specific stuff for the Hynix h7201 | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/module.h> | |
19 | #include <asm/types.h> | |
a09e64fb | 20 | #include <mach/hardware.h> |
1da177e4 | 21 | #include <asm/irq.h> |
a09e64fb | 22 | #include <mach/irqs.h> |
1da177e4 LT |
23 | #include <asm/mach/irq.h> |
24 | #include <asm/mach/time.h> | |
25 | #include "common.h" | |
26 | /* | |
27 | * Timer interrupt handler | |
28 | */ | |
29 | static irqreturn_t | |
0cd61b68 | 30 | h7201_timer_interrupt(int irq, void *dev_id) |
1da177e4 | 31 | { |
1da177e4 | 32 | CPU_REG (TIMER_VIRT, TIMER_TOPSTAT); |
0cd61b68 | 33 | timer_tick(); |
1da177e4 | 34 | |
1da177e4 LT |
35 | return IRQ_HANDLED; |
36 | } | |
37 | ||
38 | static struct irqaction h7201_timer_irq = { | |
39 | .name = "h7201 Timer Tick", | |
b30fabad | 40 | .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, |
09b8b5f8 | 41 | .handler = h7201_timer_interrupt, |
1da177e4 LT |
42 | }; |
43 | ||
44 | /* | |
45 | * Setup TIMER0 as system timer | |
46 | */ | |
47 | void __init h7201_init_time(void) | |
48 | { | |
49 | CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH; | |
50 | CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET; | |
51 | CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START; | |
52 | CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT; | |
53 | ||
54 | setup_irq(IRQ_TIMER0, &h7201_timer_irq); | |
55 | } | |
56 | ||
57 | struct sys_timer h7201_timer = { | |
58 | .init = h7201_init_time, | |
59 | .offset = h720x_gettimeoffset, | |
60 | }; |