arch/arm/mach-integrator/core.c

   1 /*
   2  *  linux/arch/arm/mach-integrator/core.c
   3  *
   4  *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2, as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/types.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/device.h>
  14 #include <linux/spinlock.h>
  15
  16 #include <asm/hardware.h>
  17 #include <asm/irq.h>
  18 #include <asm/io.h>
  19 #include <asm/hardware/amba.h>
  20 #include <asm/arch/cm.h>
  21
  22 static struct amba_device rtc_device = {
  23         .dev            = {
  24                 .bus_id = "mb:15",
  25         },
  26         .res            = {
  27                 .start  = INTEGRATOR_RTC_BASE,
  28                 .end    = INTEGRATOR_RTC_BASE + SZ_4K - 1,
  29                 .flags  = IORESOURCE_MEM,
  30         },
  31         .irq            = { IRQ_RTCINT, NO_IRQ },
  32         .periphid       = 0x00041030,
  33 };
  34
  35 static struct amba_device uart0_device = {
  36         .dev            = {
  37                 .bus_id = "mb:16",
  38         },
  39         .res            = {
  40                 .start  = INTEGRATOR_UART0_BASE,
  41                 .end    = INTEGRATOR_UART0_BASE + SZ_4K - 1,
  42                 .flags  = IORESOURCE_MEM,
  43         },
  44         .irq            = { IRQ_UARTINT0, NO_IRQ },
  45         .periphid       = 0x0041010,
  46 };
  47
  48 static struct amba_device uart1_device = {
  49         .dev            = {
  50                 .bus_id = "mb:17",
  51         },
  52         .res            = {
  53                 .start  = INTEGRATOR_UART1_BASE,
  54                 .end    = INTEGRATOR_UART1_BASE + SZ_4K - 1,
  55                 .flags  = IORESOURCE_MEM,
  56         },
  57         .irq            = { IRQ_UARTINT1, NO_IRQ },
  58         .periphid       = 0x0041010,
  59 };
  60
  61 static struct amba_device kmi0_device = {
  62         .dev            = {
  63                 .bus_id = "mb:18",
  64         },
  65         .res            = {
  66                 .start  = KMI0_BASE,
  67                 .end    = KMI0_BASE + SZ_4K - 1,
  68                 .flags  = IORESOURCE_MEM,
  69         },
  70         .irq            = { IRQ_KMIINT0, NO_IRQ },
  71         .periphid       = 0x00041050,
  72 };
  73
  74 static struct amba_device kmi1_device = {
  75         .dev            = {
  76                 .bus_id = "mb:19",
  77         },
  78         .res            = {
  79                 .start  = KMI1_BASE,
  80                 .end    = KMI1_BASE + SZ_4K - 1,
  81                 .flags  = IORESOURCE_MEM,
  82         },
  83         .irq            = { IRQ_KMIINT1, NO_IRQ },
  84         .periphid       = 0x00041050,
  85 };
  86
  87 static struct amba_device *amba_devs[] __initdata = {
  88         &rtc_device,
  89         &uart0_device,
  90         &uart1_device,
  91         &kmi0_device,
  92         &kmi1_device,
  93 };
  94
  95 static int __init integrator_init(void)
  96 {
  97         int i;
  98
  99         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 100                 struct amba_device *d = amba_devs[i];
 101                 amba_device_register(d, &iomem_resource);
 102         }
 103
 104         return 0;
 105 }
 106
 107 arch_initcall(integrator_init);
 108
 109 #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_BASE) + INTEGRATOR_HDR_CTRL_OFFSET
 110
 111 static spinlock_t cm_lock = SPIN_LOCK_UNLOCKED;
 112
 113 /**
 114  * cm_control - update the CM_CTRL register.
 115  * @mask: bits to change
 116  * @set: bits to set
 117  */
 118 void cm_control(u32 mask, u32 set)
 119 {
 120         unsigned long flags;
 121         u32 val;
 122
 123         spin_lock_irqsave(&cm_lock, flags);
 124         val = readl(CM_CTRL) & ~mask;
 125         writel(val | set, CM_CTRL);
 126         spin_unlock_irqrestore(&cm_lock, flags);
 127 }
 128
 129 EXPORT_SYMBOL(cm_control);