target/linux/cns21xx/patches-3.8/004-arm-add-fa-time.patch

   1 --- /dev/null
   2 +++ b/arch/arm/plat-fa/include/plat/time.h
   3 @@ -0,0 +1,20 @@
   4 +/*
   5 + *  Copyright (c) 2010-2012 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) 2010-2012 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-  :=