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config.c

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

/*
 *  linux/arch/m68knommu/platform/520x/config.c
 *
 *  Copyright (C) 2005,      Freescale (www.freescale.com)
 *  Copyright (C) 2005,      Intec Automation (mike@steroidmicros.com)
 *  Copyright (C) 1999-2007, 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/interrupt.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>

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

void coldfire_reset(void);

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

static struct mcf_platform_uart m520x_uart_platform[] = {
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE1,
            .irq        = MCFINT_VECBASE + MCFINT_UART0,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE2,
            .irq        = MCFINT_VECBASE + MCFINT_UART1,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE3,
            .irq        = MCFINT_VECBASE + MCFINT_UART2,
      },
      { },
};

static struct platform_device m520x_uart = {
      .name             = "mcfuart",
      .id               = 0,
      .dev.platform_data      = m520x_uart_platform,
};

static struct platform_device *m520x_devices[] __initdata = {
      &m520x_uart,
};

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

#define     INTC0 (MCF_MBAR + MCFICM_INTC0)

static void __init m520x_uart_init_line(int line, int irq)
{
      u32 imr;
      u16 par;
      u8 par2;

      writeb(0x03, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);

      imr = readl(INTC0 + MCFINTC_IMRL);
      imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
      writel(imr, INTC0 + MCFINTC_IMRL);

      switch (line) {
      case 0:
            par = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
            par |= MCF_GPIO_PAR_UART_PAR_UTXD0 |
                   MCF_GPIO_PAR_UART_PAR_URXD0;
            writew(par, MCF_IPSBAR + MCF_GPIO_PAR_UART);
            break;
      case 1:
            par = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
            par |= MCF_GPIO_PAR_UART_PAR_UTXD1 |
                   MCF_GPIO_PAR_UART_PAR_URXD1;
            writew(par, MCF_IPSBAR + MCF_GPIO_PAR_UART);
            break;
      case 2:
            par2 = readb(MCF_IPSBAR + MCF_GPIO_PAR_FECI2C);
            par2 &= ~0x0F;
            par2 |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 |
                  MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
            writeb(par2, MCF_IPSBAR + MCF_GPIO_PAR_FECI2C);
            break;
      }
}

static void __init m520x_uarts_init(void)
{
      const int nrlines = ARRAY_SIZE(m520x_uart_platform);
      int line;

      for (line = 0; (line < nrlines); line++)
            m520x_uart_init_line(line, m520x_uart_platform[line].irq);
}

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

/*
 *  Program the vector to be an auto-vectored.
 */

void mcf_autovector(unsigned int vec)
{
    /* Everything is auto-vectored on the 520x devices */
}

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

void __init config_BSP(char *commandp, int size)
{
      mach_reset = coldfire_reset;
      m520x_uarts_init();
}

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

static int __init init_BSP(void)
{
      platform_add_devices(m520x_devices, ARRAY_SIZE(m520x_devices));
      return 0;
}

arch_initcall(init_BSP);

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

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