arch/arm/mach-shark/core.c

   1 /*
   2  *  linux/arch/arm/mach-shark/arch.c
   3  *
   4  *  Architecture specific stuff.
   5  */
   6 #include <linux/kernel.h>
   7 #include <linux/init.h>
   8 #include <linux/interrupt.h>
   9 #include <linux/irq.h>
  10 #include <linux/sched.h>
  11 #include <linux/serial_8250.h>
  12 #include <linux/io.h>
  13
  14 #include <asm/setup.h>
  15 #include <asm/mach-types.h>
  16 #include <asm/leds.h>
  17 #include <asm/param.h>
  18
  19 #include <asm/mach/map.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/time.h>
  22
  23 #define IO_BASE                 0xe0000000
  24 #define IO_SIZE                 0x08000000
  25 #define IO_START                0x40000000
  26 #define ROMCARD_SIZE            0x08000000
  27 #define ROMCARD_START           0x10000000
  28
  29 void arch_reset(char mode, const char *cmd)
  30 {
  31         short temp;
  32         local_irq_disable();
  33         /* Reset the Machine via pc[3] of the sequoia chipset */
  34         outw(0x09,0x24);
  35         temp=inw(0x26);
  36         temp = temp | (1<<3) | (1<<10);
  37         outw(0x09,0x24);
  38         outw(temp,0x26);
  39 }
  40
  41 static struct plat_serial8250_port serial_platform_data[] = {
  42         {
  43                 .iobase         = 0x3f8,
  44                 .irq            = 4,
  45                 .uartclk        = 1843200,
  46                 .regshift       = 0,
  47                 .iotype         = UPIO_PORT,
  48                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  49         },
  50         {
  51                 .iobase         = 0x2f8,
  52                 .irq            = 3,
  53                 .uartclk        = 1843200,
  54                 .regshift       = 0,
  55                 .iotype         = UPIO_PORT,
  56                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  57         },
  58         { },
  59 };
  60
  61 static struct platform_device serial_device = {
  62         .name                   = "serial8250",
  63         .id                     = PLAT8250_DEV_PLATFORM,
  64         .dev                    = {
  65                 .platform_data  = serial_platform_data,
  66         },
  67 };
  68
  69 static struct resource rtc_resources[] = {
  70         [0] = {
  71                 .start  = 0x70,
  72                 .end    = 0x73,
  73                 .flags  = IORESOURCE_IO,
  74         },
  75         [1] = {
  76                 .start  = IRQ_ISA_RTC_ALARM,
  77                 .end    = IRQ_ISA_RTC_ALARM,
  78                 .flags  = IORESOURCE_IRQ,
  79         }
  80 };
  81
  82 static struct platform_device rtc_device = {
  83         .name           = "rtc_cmos",
  84         .id             = -1,
  85         .resource       = rtc_resources,
  86         .num_resources  = ARRAY_SIZE(rtc_resources),
  87 };
  88
  89 static int __init shark_init(void)
  90 {
  91         int ret;
  92
  93         if (machine_is_shark())
  94         {
  95                 ret = platform_device_register(&rtc_device);
  96                 if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret);
  97                 ret = platform_device_register(&serial_device);
  98                 if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret);
  99         }
 100         return 0;
 101 }
 102
 103 arch_initcall(shark_init);
 104
 105 extern void shark_init_irq(void);
 106
 107 static struct map_desc shark_io_desc[] __initdata = {
 108         {
 109                 .virtual        = IO_BASE,
 110                 .pfn            = __phys_to_pfn(IO_START),
 111                 .length         = IO_SIZE,
 112                 .type           = MT_DEVICE
 113         }
 114 };
 115
 116 static void __init shark_map_io(void)
 117 {
 118         iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
 119 }
 120
 121 #define IRQ_TIMER 0
 122 #define HZ_TIME ((1193180 + HZ/2) / HZ)
 123
 124 static irqreturn_t
 125 shark_timer_interrupt(int irq, void *dev_id)
 126 {
 127         timer_tick();
 128         return IRQ_HANDLED;
 129 }
 130
 131 static struct irqaction shark_timer_irq = {
 132         .name           = "Shark Timer Tick",
 133         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 134         .handler        = shark_timer_interrupt,
 135 };
 136
 137 /*
 138  * Set up timer interrupt, and return the current time in seconds.
 139  */
 140 static void __init shark_timer_init(void)
 141 {
 142         outb(0x34, 0x43);               /* binary, mode 0, LSB/MSB, Ch 0 */
 143         outb(HZ_TIME & 0xff, 0x40);     /* LSB of count */
 144         outb(HZ_TIME >> 8, 0x40);
 145
 146         setup_irq(IRQ_TIMER, &shark_timer_irq);
 147 }
 148
 149 static struct sys_timer shark_timer = {
 150         .init           = shark_timer_init,
 151 };
 152
 153 MACHINE_START(SHARK, "Shark")
 154         /* Maintainer: Alexander Schulz */
 155         .atag_offset    = 0x3000,
 156         .map_io         = shark_map_io,
 157         .init_irq       = shark_init_irq,
 158         .timer          = &shark_timer,
 159         .dma_zone_size  = SZ_4M,
 160 MACHINE_END