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config.c

/***************************************************************************/

/*
 *    linux/arch/m68knommu/platform/528x/config.c
 *
 *    Sub-architcture dependant initialization code for the Freescale
 *    5280, 5281 and 5282 CPUs.
 *
 *    Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
 *    Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>

/***************************************************************************/

static struct mcf_platform_uart m528x_uart_platform[] = {
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE1,
            .irq        = MCFINT_VECBASE + MCFINT_UART0,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE2,
            .irq        = MCFINT_VECBASE + MCFINT_UART0 + 1,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE3,
            .irq        = MCFINT_VECBASE + MCFINT_UART0 + 2,
      },
      { },
};

static struct platform_device m528x_uart = {
      .name             = "mcfuart",
      .id               = 0,
      .dev.platform_data      = m528x_uart_platform,
};

static struct resource m528x_fec_resources[] = {
      {
            .start            = MCF_MBAR + 0x1000,
            .end        = MCF_MBAR + 0x1000 + 0x7ff,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = 64 + 23,
            .end        = 64 + 23,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = 64 + 27,
            .end        = 64 + 27,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = 64 + 29,
            .end        = 64 + 29,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device m528x_fec = {
      .name             = "fec",
      .id               = 0,
      .num_resources          = ARRAY_SIZE(m528x_fec_resources),
      .resource         = m528x_fec_resources,
};


static struct platform_device *m528x_devices[] __initdata = {
      &m528x_uart,
      &m528x_fec,
};

/***************************************************************************/

static void __init m528x_uart_init_line(int line, int irq)
{
      u8 port;

      if ((line < 0) || (line > 2))
            return;

      /* make sure PUAPAR is set for UART0 and UART1 */
      if (line < 2) {
            port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
            port |= (0x03 << (line * 2));
            writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
      }
}

static void __init m528x_uarts_init(void)
{
      const int nrlines = ARRAY_SIZE(m528x_uart_platform);
      int line;

      for (line = 0; (line < nrlines); line++)
            m528x_uart_init_line(line, m528x_uart_platform[line].irq);
}

/***************************************************************************/

static void __init m528x_fec_init(void)
{
      u16 v16;

      /* Set multi-function pins to ethernet mode for fec0 */
      v16 = readw(MCF_IPSBAR + 0x100056);
      writew(v16 | 0xf00, MCF_IPSBAR + 0x100056);
      writeb(0xc0, MCF_IPSBAR + 0x100058);
}

/***************************************************************************/

static void m528x_cpu_reset(void)
{
      local_irq_disable();
      __raw_writeb(MCF_RCR_SWRESET, MCF_IPSBAR + MCF_RCR);
}

/***************************************************************************/

#ifdef CONFIG_WILDFIRE
void wildfire_halt(void)
{
      writeb(0, 0x30000007);
      writeb(0x2, 0x30000007);
}
#endif

#ifdef CONFIG_WILDFIREMOD
void wildfiremod_halt(void)
{
      printk(KERN_INFO "WildFireMod hibernating...\n");

      /* Set portE.5 to Digital IO */
      MCF5282_GPIO_PEPAR &= ~(1 << (5 * 2));

      /* Make portE.5 an output */
      MCF5282_GPIO_DDRE |= (1 << 5);

      /* Now toggle portE.5 from low to high */
      MCF5282_GPIO_PORTE &= ~(1 << 5);
      MCF5282_GPIO_PORTE |= (1 << 5);

      printk(KERN_EMERG "Failed to hibernate. Halting!\n");
}
#endif

void __init config_BSP(char *commandp, int size)
{
#ifdef CONFIG_WILDFIRE
      mach_halt = wildfire_halt;
#endif
#ifdef CONFIG_WILDFIREMOD
      mach_halt = wildfiremod_halt;
#endif
}

/***************************************************************************/

static int __init init_BSP(void)
{
      mach_reset = m528x_cpu_reset;
      m528x_uarts_init();
      m528x_fec_init();
      platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
      return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/

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