release/src-rt-6.x.4708/linux/linux-2.6.36/arch/m68knommu/platform/5206/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5206/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  *      Copyright (C) 2000-2001, Lineo Inc. (www.lineo.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/param.h>
  14 #include <linux/init.h>
  15 #include <linux/io.h>
  16 #include <asm/machdep.h>
  17 #include <asm/coldfire.h>
  18 #include <asm/mcfsim.h>
  19 #include <asm/mcfuart.h>
  20
  21 /***************************************************************************/
  22
  23 static struct mcf_platform_uart m5206_uart_platform[] = {
  24         {
  25                 .mapbase        = MCF_MBAR + MCFUART_BASE1,
  26                 .irq            = 73,
  27         },
  28         {
  29                 .mapbase        = MCF_MBAR + MCFUART_BASE2,
  30                 .irq            = 74,
  31         },
  32         { },
  33 };
  34
  35 static struct platform_device m5206_uart = {
  36         .name                   = "mcfuart",
  37         .id                     = 0,
  38         .dev.platform_data      = m5206_uart_platform,
  39 };
  40
  41 static struct platform_device *m5206_devices[] __initdata = {
  42         &m5206_uart,
  43 };
  44
  45 /***************************************************************************/
  46
  47 static void __init m5206_uart_init_line(int line, int irq)
  48 {
  49         if (line == 0) {
  50                 writel(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI1, MCF_MBAR + MCFSIM_UART1ICR);
  51                 writeb(irq, MCFUART_BASE1 + MCFUART_UIVR);
  52                 mcf_mapirq2imr(irq, MCFINTC_UART0);
  53         } else if (line == 1) {
  54                 writel(MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI2, MCF_MBAR + MCFSIM_UART2ICR);
  55                 writeb(irq, MCFUART_BASE2 + MCFUART_UIVR);
  56                 mcf_mapirq2imr(irq, MCFINTC_UART1);
  57         }
  58 }
  59
  60 static void __init m5206_uarts_init(void)
  61 {
  62         const int nrlines = ARRAY_SIZE(m5206_uart_platform);
  63         int line;
  64
  65         for (line = 0; (line < nrlines); line++)
  66                 m5206_uart_init_line(line, m5206_uart_platform[line].irq);
  67 }
  68
  69 /***************************************************************************/
  70
  71 static void __init m5206_timers_init(void)
  72 {
  73         /* Timer1 is always used as system timer */
  74         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL6 | MCFSIM_ICR_PRI3,
  75                 MCF_MBAR + MCFSIM_TIMER1ICR);
  76         mcf_mapirq2imr(MCF_IRQ_TIMER, MCFINTC_TIMER1);
  77
  78 #ifdef CONFIG_HIGHPROFILE
  79         /* Timer2 is to be used as a high speed profile timer  */
  80         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL7 | MCFSIM_ICR_PRI3,
  81                 MCF_MBAR + MCFSIM_TIMER2ICR);
  82         mcf_mapirq2imr(MCF_IRQ_PROFILER, MCFINTC_TIMER2);
  83 #endif
  84 }
  85
  86 /***************************************************************************/
  87
  88 void m5206_cpu_reset(void)
  89 {
  90         local_irq_disable();
  91         /* Set watchdog to soft reset, and enabled */
  92         __raw_writeb(0xc0, MCF_MBAR + MCFSIM_SYPCR);
  93         for (;;)
  94                 /* wait for watchdog to timeout */;
  95 }
  96
  97 /***************************************************************************/
  98
  99 void __init config_BSP(char *commandp, int size)
 100 {
 101         mach_reset = m5206_cpu_reset;
 102         m5206_timers_init();
 103         m5206_uarts_init();
 104
 105         /* Only support the external interrupts on their primary level */
 106         mcf_mapirq2imr(25, MCFINTC_EINT1);
 107         mcf_mapirq2imr(28, MCFINTC_EINT4);
 108         mcf_mapirq2imr(31, MCFINTC_EINT7);
 109 }
 110
 111 /***************************************************************************/
 112
 113 static int __init init_BSP(void)
 114 {
 115         platform_add_devices(m5206_devices, ARRAY_SIZE(m5206_devices));
 116         return 0;
 117 }
 118
 119 arch_initcall(init_BSP);
 120
 121 /***************************************************************************/