| 1 | --- /dev/null |
| 2 | +++ b/arch/arm/plat-fa/include/plat/time.h |
| 3 | @@ -0,0 +1,20 @@ |
| 4 | +/* |
| 5 | + * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org> |
| 6 | + * |
| 7 | + * This program is free software; you can redistribute it and/or modify |
| 8 | + * it under the terms of the GNU General Public License as published by |
| 9 | + * the Free Software Foundation; either version 2 of the License, or |
| 10 | + * (at your option) any later version. |
| 11 | + */ |
| 12 | + |
| 13 | +#ifndef _FA_TIME_H |
| 14 | +#define _FA_TIME_H |
| 15 | + |
| 16 | +#define FA_TIMER1 0 |
| 17 | +#define FA_TIMER2 1 |
| 18 | +#define FA_TIMER3 2 |
| 19 | + |
| 20 | +int __init fa_timer_init(unsigned int mapbase, unsigned int irq, |
| 21 | + unsigned int timer, unsigned int freq); |
| 22 | + |
| 23 | +#endif /* _FA_TIME_H */ |
| 24 | --- /dev/null |
| 25 | +++ b/arch/arm/plat-fa/time.c |
| 26 | @@ -0,0 +1,97 @@ |
| 27 | +/* |
| 28 | + * Copyright (C) 2001-2006 Storlink, Corp. |
| 29 | + * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> |
| 30 | + * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org> |
| 31 | + * |
| 32 | + * This program is free software; you can redistribute it and/or modify |
| 33 | + * it under the terms of the GNU General Public License as published by |
| 34 | + * the Free Software Foundation; either version 2 of the License, or |
| 35 | + * (at your option) any later version. |
| 36 | + */ |
| 37 | + |
| 38 | +#include <linux/init.h> |
| 39 | +#include <linux/interrupt.h> |
| 40 | +#include <linux/irq.h> |
| 41 | +#include <linux/io.h> |
| 42 | + |
| 43 | +#include <asm/mach/time.h> |
| 44 | +#include <plat/time.h> |
| 45 | + |
| 46 | +/* |
| 47 | + * Register definitions for the timers |
| 48 | + */ |
| 49 | +#define TIMER_COUNT(_base, _tmr) ((_base) + 0x00 + (_tmr) * 0x10) |
| 50 | +#define TIMER_LOAD(_base, _tmr) ((_base) + 0x04 + (_tmr) * 0x10) |
| 51 | +#define TIMER_MATCH1(_base, _tmr) ((_base) + 0x08 + (_tmr) * 0x10) |
| 52 | +#define TIMER_MATCH2(_base, _tmr) ((_base) + 0x0c + (_tmr) * 0x10) |
| 53 | + |
| 54 | +#define TIMER_CR(_base) ((_base) + 0x30) |
| 55 | +#define TIMER_STATUS(_base) ((_base) + 0x34) |
| 56 | +#define TIMER_MASK(_base) ((_base) + 0x38) |
| 57 | + |
| 58 | +#define TIMER_SIZE 0x3c |
| 59 | + |
| 60 | +#define TIMER_CR_ENABLE(x) (1 << ((x) * 3)) |
| 61 | +#define TIMER_CR_CLOCK(x) (1 << ((x) * 3 + 1)) |
| 62 | +#define TIMER_CR_INT(x) (1 << ((x) * 3 + 2)) |
| 63 | +#define TIMER_CR_DOWN(x) (1 << ((x) * 3 + 9)) |
| 64 | + |
| 65 | +#define TIMER_MASK_MATCH1(x) (1 << ((x) * 3)) |
| 66 | +#define TIMER_MASK_MATCH2(x) (1 << ((x) * 3 + 1)) |
| 67 | +#define TIMER_MASK_OF(x) (1 << ((x) * 3 + 2)) |
| 68 | + |
| 69 | +#define TIMER_MASK_ALL 0x7ff |
| 70 | + |
| 71 | +/* |
| 72 | + * IRQ handler for the timer |
| 73 | + */ |
| 74 | +static irqreturn_t fa_timer_interrupt(int irq, void *dev_id) |
| 75 | +{ |
| 76 | + timer_tick(); |
| 77 | + return IRQ_HANDLED; |
| 78 | +} |
| 79 | + |
| 80 | +static struct irqaction fa_timer_irq = { |
| 81 | + .name = "Timer Tick", |
| 82 | + .flags = IRQF_DISABLED | IRQF_TIMER, |
| 83 | + .handler = fa_timer_interrupt, |
| 84 | +}; |
| 85 | + |
| 86 | +int __init fa_timer_init(unsigned int mapbase, unsigned int irq, |
| 87 | + unsigned int timer, unsigned int freq) |
| 88 | +{ |
| 89 | + void __iomem *base; |
| 90 | + |
| 91 | + base = ioremap(mapbase, TIMER_SIZE); |
| 92 | + if (!base) |
| 93 | + return -ENOMEM; |
| 94 | + |
| 95 | + /* disable timers, clear status and mask all interrupts */ |
| 96 | + __raw_writel(0, TIMER_CR(base)); |
| 97 | + __raw_writel(0, TIMER_STATUS(base)); |
| 98 | + __raw_writel(TIMER_MASK_ALL, TIMER_MASK(base)); |
| 99 | + |
| 100 | + /* |
| 101 | + * Make irqs happen for the system timer |
| 102 | + */ |
| 103 | + setup_irq(irq, &fa_timer_irq); |
| 104 | + |
| 105 | + /* Setup the timer */ |
| 106 | + __raw_writel(freq / HZ, TIMER_COUNT(base, timer)); |
| 107 | + __raw_writel(freq / HZ, TIMER_LOAD(base, timer)); |
| 108 | + __raw_writel(0, TIMER_MATCH1(base, timer)); |
| 109 | + __raw_writel(0, TIMER_MATCH2(base, timer)); |
| 110 | + |
| 111 | + /* Enable interrupt and start the timer */ |
| 112 | + __raw_writel(TIMER_MASK_ALL & ~TIMER_MASK_OF(timer), |
| 113 | + TIMER_MASK(base)); |
| 114 | + |
| 115 | + __raw_writel(TIMER_CR_ENABLE(timer) | |
| 116 | + TIMER_CR_INT(timer) | |
| 117 | + TIMER_CR_DOWN(timer), |
| 118 | + TIMER_CR(base)); |
| 119 | + |
| 120 | + iounmap(base); |
| 121 | + |
| 122 | + return 0; |
| 123 | +} |
| 124 | --- a/arch/arm/plat-fa/Kconfig |
| 125 | +++ b/arch/arm/plat-fa/Kconfig |
| 126 | @@ -1,3 +1,6 @@ |
| 127 | if PLAT_FA |
| 128 | |
| 129 | +config PLAT_FA_TIME |
| 130 | + def_bool n |
| 131 | + |
| 132 | endif |
| 133 | --- a/arch/arm/plat-fa/Makefile |
| 134 | +++ b/arch/arm/plat-fa/Makefile |
| 135 | @@ -4,6 +4,8 @@ |
| 136 | |
| 137 | obj-y := |
| 138 | |
| 139 | +obj-$(CONFIG_PLAT_FA_TIME) += time.o |
| 140 | + |
| 141 | obj-m := |
| 142 | obj-n := |
| 143 | obj- := |
| 144 | |
