arch/m68knommu/platform/523x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/523x/config.c
   5  *
   6  *      Sub-architcture dependant initialization code for the Freescale
   7  *      523x CPUs.
   8  *
   9  *      Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com)
  10  *      Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  11  */
  12
  13 /***************************************************************************/
  14
  15 #include <linux/kernel.h>
  16 #include <linux/param.h>
  17 #include <linux/init.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/io.h>
  20 #include <asm/machdep.h>
  21 #include <asm/coldfire.h>
  22 #include <asm/mcfsim.h>
  23 #include <asm/mcfuart.h>
  24
  25 /***************************************************************************/
  26
  27 void coldfire_reset(void);
  28
  29 /***************************************************************************/
  30
  31 static struct mcf_platform_uart m523x_uart_platform[] = {
  32         {
  33                 .mapbase        = MCF_MBAR + MCFUART_BASE1,
  34                 .irq            = MCFINT_VECBASE + MCFINT_UART0,
  35         },
  36         {
  37                 .mapbase        = MCF_MBAR + MCFUART_BASE2,
  38                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 1,
  39         },
  40         {
  41                 .mapbase        = MCF_MBAR + MCFUART_BASE3,
  42                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 2,
  43         },
  44         { },
  45 };
  46
  47 static struct platform_device m523x_uart = {
  48         .name                   = "mcfuart",
  49         .id                     = 0,
  50         .dev.platform_data      = m523x_uart_platform,
  51 };
  52
  53 static struct platform_device *m523x_devices[] __initdata = {
  54         &m523x_uart,
  55 };
  56
  57 /***************************************************************************/
  58
  59 #define INTC0   (MCF_MBAR + MCFICM_INTC0)
  60
  61 static void __init m523x_uart_init_line(int line, int irq)
  62 {
  63         u32 imr;
  64
  65         if ((line < 0) || (line > 2))
  66                 return;
  67
  68         writeb(0x30+line, (INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line));
  69
  70         imr = readl(INTC0 + MCFINTC_IMRL);
  71         imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
  72         writel(imr, INTC0 + MCFINTC_IMRL);
  73 }
  74
  75 static void __init m523x_uarts_init(void)
  76 {
  77         const int nrlines = ARRAY_SIZE(m523x_uart_platform);
  78         int line;
  79
  80         for (line = 0; (line < nrlines); line++)
  81                 m523x_uart_init_line(line, m523x_uart_platform[line].irq);
  82 }
  83
  84 /***************************************************************************/
  85
  86 void mcf_disableall(void)
  87 {
  88         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
  89         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
  90 }
  91
  92 /***************************************************************************/
  93
  94 void mcf_autovector(unsigned int vec)
  95 {
  96         /* Everything is auto-vectored on the 523x */
  97 }
  98
  99 /***************************************************************************/
 100
 101 void __init config_BSP(char *commandp, int size)
 102 {
 103         mcf_disableall();
 104         mach_reset = coldfire_reset;
 105         m523x_uarts_init();
 106 }
 107
 108 /***************************************************************************/
 109
 110 static int __init init_BSP(void)
 111 {
 112         platform_add_devices(m523x_devices, ARRAY_SIZE(m523x_devices));
 113         return 0;
 114 }
 115
 116 arch_initcall(init_BSP);
 117
 118 /***************************************************************************/