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core.c

/*
 *  linux/arch/arm/mach-shark/arch.c
 *
 *  Architecture specific stuff.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/serial_8250.h>
#include <linux/io.h>

#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/leds.h>
#include <asm/param.h>

#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>

#define IO_BASE                 0xe0000000
#define IO_SIZE                 0x08000000
#define IO_START                0x40000000
#define ROMCARD_SIZE            0x08000000
#define ROMCARD_START           0x10000000

void arch_reset(char mode, const char *cmd)
{
        short temp;
        local_irq_disable();
        /* Reset the Machine via pc[3] of the sequoia chipset */
        outw(0x09,0x24);
        temp=inw(0x26);
        temp = temp | (1<<3) | (1<<10);
        outw(0x09,0x24);
        outw(temp,0x26);
}

static struct plat_serial8250_port serial_platform_data[] = {
      {
            .iobase           = 0x3f8,
            .irq        = 4,
            .uartclk    = 1843200,
            .regshift   = 0,
            .iotype           = UPIO_PORT,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
      },
      {
            .iobase           = 0x2f8,
            .irq        = 3,
            .uartclk    = 1843200,
            .regshift   = 0,
            .iotype           = UPIO_PORT,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
      },
      { },
};

static struct platform_device serial_device = {
      .name             = "serial8250",
      .id               = PLAT8250_DEV_PLATFORM,
      .dev              = {
            .platform_data    = serial_platform_data,
      },
};

static struct resource rtc_resources[] = {
      [0] = {
            .start      = 0x70,
            .end  = 0x73,
            .flags      = IORESOURCE_IO,
      },
      [1] = {
            .start      = IRQ_ISA_RTC_ALARM,
            .end  = IRQ_ISA_RTC_ALARM,
            .flags      = IORESOURCE_IRQ,
      }
};

static struct platform_device rtc_device = {
      .name       = "rtc_cmos",
      .id         = -1,
      .resource   = rtc_resources,
      .num_resources    = ARRAY_SIZE(rtc_resources),
};

static int __init shark_init(void)
{
      int ret;

      if (machine_is_shark())
      {
              ret = platform_device_register(&rtc_device);
            if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret);
            ret = platform_device_register(&serial_device);
            if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret);
      }
      return 0;
}

arch_initcall(shark_init);

extern void shark_init_irq(void);

static struct map_desc shark_io_desc[] __initdata = {
      {
            .virtual    = IO_BASE,
            .pfn        = __phys_to_pfn(IO_START),
            .length           = IO_SIZE,
            .type       = MT_DEVICE
      }
};

static void __init shark_map_io(void)
{
      iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
}

#define IRQ_TIMER 0
#define HZ_TIME ((1193180 + HZ/2) / HZ)

static irqreturn_t
shark_timer_interrupt(int irq, void *dev_id)
{
      timer_tick();
      return IRQ_HANDLED;
}

static struct irqaction shark_timer_irq = {
      .name       = "Shark Timer Tick",
      .flags            = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
      .handler    = shark_timer_interrupt,
};

/*
 * Set up timer interrupt, and return the current time in seconds.
 */
static void __init shark_timer_init(void)
{
      outb(0x34, 0x43);               /* binary, mode 0, LSB/MSB, Ch 0 */
      outb(HZ_TIME & 0xff, 0x40);     /* LSB of count */
      outb(HZ_TIME >> 8, 0x40);

      setup_irq(IRQ_TIMER, &shark_timer_irq);
}

static struct sys_timer shark_timer = {
      .init       = shark_timer_init,
};

MACHINE_START(SHARK, "Shark")
      /* Maintainer: Alexander Schulz */
      .phys_io    = 0x40000000,
      .io_pg_offst      = ((0xe0000000) >> 18) & 0xfffc,
      .boot_params      = 0x08003000,
      .map_io           = shark_map_io,
      .init_irq   = shark_init_irq,
      .timer            = &shark_timer,
MACHINE_END

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