linux/arch/m68knommu/platform/548x/config.c
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   1/***************************************************************************/
   2
   3/*
   4 *      linux/arch/m68knommu/platform/548x/config.c
   5 *
   6 *      Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be>
   7 */
   8
   9/***************************************************************************/
  10
  11#include <linux/kernel.h>
  12#include <linux/param.h>
  13#include <linux/init.h>
  14#include <linux/interrupt.h>
  15#include <linux/io.h>
  16#include <asm/machdep.h>
  17#include <asm/coldfire.h>
  18#include <asm/m548xsim.h>
  19#include <asm/mcfuart.h>
  20#include <asm/m548xgpt.h>
  21
  22/***************************************************************************/
  23
  24static struct mcf_platform_uart m548x_uart_platform[] = {
  25        {
  26                .mapbase        = MCF_MBAR + MCFUART_BASE1,
  27                .irq            = 64 + 35,
  28        },
  29        {
  30                .mapbase        = MCF_MBAR + MCFUART_BASE2,
  31                .irq            = 64 + 34,
  32        },
  33        {
  34                .mapbase        = MCF_MBAR + MCFUART_BASE3,
  35                .irq            = 64 + 33,
  36        },
  37        {
  38                .mapbase        = MCF_MBAR + MCFUART_BASE4,
  39                .irq            = 64 + 32,
  40        },
  41};
  42
  43static struct platform_device m548x_uart = {
  44        .name                   = "mcfuart",
  45        .id                     = 0,
  46        .dev.platform_data      = m548x_uart_platform,
  47};
  48
  49static struct platform_device *m548x_devices[] __initdata = {
  50        &m548x_uart,
  51};
  52
  53
  54/***************************************************************************/
  55
  56static void __init m548x_uart_init_line(int line, int irq)
  57{
  58        int rts_cts;
  59
  60        /* enable io pins */
  61        switch (line) {
  62        case 0:
  63                rts_cts = 0; break;
  64        case 1:
  65                rts_cts = MCF_PAR_PSC_RTS_RTS; break;
  66        case 2:
  67                rts_cts = MCF_PAR_PSC_RTS_RTS | MCF_PAR_PSC_CTS_CTS; break;
  68        case 3:
  69                rts_cts = 0; break;
  70        }
  71        __raw_writeb(MCF_PAR_PSC_TXD | rts_cts | MCF_PAR_PSC_RXD,
  72                                                MCF_MBAR + MCF_PAR_PSC(line));
  73}
  74
  75static void __init m548x_uarts_init(void)
  76{
  77        const int nrlines = ARRAY_SIZE(m548x_uart_platform);
  78        int line;
  79
  80        for (line = 0; (line < nrlines); line++)
  81                m548x_uart_init_line(line, m548x_uart_platform[line].irq);
  82}
  83
  84/***************************************************************************/
  85
  86static void mcf548x_reset(void)
  87{
  88        /* disable interrupts and enable the watchdog */
  89        asm("movew #0x2700, %sr\n");
  90        __raw_writel(0, MCF_MBAR + MCF_GPT_GMS0);
  91        __raw_writel(MCF_GPT_GCIR_CNT(1), MCF_MBAR + MCF_GPT_GCIR0);
  92        __raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),
  93                                                MCF_MBAR + MCF_GPT_GMS0);
  94}
  95
  96/***************************************************************************/
  97
  98void __init config_BSP(char *commandp, int size)
  99{
 100        mach_reset = mcf548x_reset;
 101        m548x_uarts_init();
 102}
 103
 104/***************************************************************************/
 105
 106static int __init init_BSP(void)
 107{
 108
 109        platform_add_devices(m548x_devices, ARRAY_SIZE(m548x_devices));
 110        return 0;
 111}
 112
 113arch_initcall(init_BSP);
 114
 115/***************************************************************************/
 116