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config.c

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

/*
 *    linux/arch/m68knommu/platform/5272/config.c
 *
 *    Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
 *    Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
 */

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

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

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

/*
 *    Some platforms need software versions of the GPIO data registers.
 */
unsigned short ppdata;
unsigned char ledbank = 0xff;

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

static struct mcf_platform_uart m5272_uart_platform[] = {
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE1,
            .irq        = MCF_IRQ_UART1,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE2,
            .irq        = MCF_IRQ_UART2,
      },
      { },
};

static struct platform_device m5272_uart = {
      .name             = "mcfuart",
      .id               = 0,
      .dev.platform_data      = m5272_uart_platform,
};

static struct resource m5272_fec_resources[] = {
      {
            .start            = MCF_MBAR + 0x840,
            .end        = MCF_MBAR + 0x840 + 0x1cf,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = MCF_IRQ_ERX,
            .end        = MCF_IRQ_ERX,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = MCF_IRQ_ETX,
            .end        = MCF_IRQ_ETX,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = MCF_IRQ_ENTC,
            .end        = MCF_IRQ_ENTC,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device m5272_fec = {
      .name             = "fec",
      .id               = 0,
      .num_resources          = ARRAY_SIZE(m5272_fec_resources),
      .resource         = m5272_fec_resources,
};

static struct platform_device *m5272_devices[] __initdata = {
      &m5272_uart,
      &m5272_fec,
};

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

static void __init m5272_uart_init_line(int line, int irq)
{
      u32 v;

      if ((line >= 0) && (line < 2)) {
            /* Enable the output lines for the serial ports */
            v = readl(MCF_MBAR + MCFSIM_PBCNT);
            v = (v & ~0x000000ff) | 0x00000055;
            writel(v, MCF_MBAR + MCFSIM_PBCNT);

            v = readl(MCF_MBAR + MCFSIM_PDCNT);
            v = (v & ~0x000003fc) | 0x000002a8;
            writel(v, MCF_MBAR + MCFSIM_PDCNT);
      }
}

static void __init m5272_uarts_init(void)
{
      const int nrlines = ARRAY_SIZE(m5272_uart_platform);
      int line;

      for (line = 0; (line < nrlines); line++)
            m5272_uart_init_line(line, m5272_uart_platform[line].irq);
}

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

static void m5272_cpu_reset(void)
{
      local_irq_disable();
      /* Set watchdog to reset, and enabled */
      __raw_writew(0, MCF_MBAR + MCFSIM_WIRR);
      __raw_writew(1, MCF_MBAR + MCFSIM_WRRR);
      __raw_writew(0, MCF_MBAR + MCFSIM_WCR);
      for (;;)
            /* wait for watchdog to timeout */;
}

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

void __init config_BSP(char *commandp, int size)
{
#if defined (CONFIG_MOD5272)
      volatile unsigned char  *pivrp;

      /* Set base of device vectors to be 64 */
      pivrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_PIVR);
      *pivrp = 0x40;
#endif

#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
      /* Copy command line from FLASH to local buffer... */
      memcpy(commandp, (char *) 0xf0004000, size);
      commandp[size-1] = 0;
#elif defined(CONFIG_CANCam)
      /* Copy command line from FLASH to local buffer... */
      memcpy(commandp, (char *) 0xf0010000, size);
      commandp[size-1] = 0;
#endif

      mach_reset = m5272_cpu_reset;
}

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

static int __init init_BSP(void)
{
      m5272_uarts_init();
      platform_add_devices(m5272_devices, ARRAY_SIZE(m5272_devices));
      return 0;
}

arch_initcall(init_BSP);

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

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