arch/m68knommu/platform/527x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/527x/config.c
   5  *
   6  *      Sub-architcture dependant initialization code for the Freescale
   7  *      5270/5271 CPUs.
   8  *
   9  *      Copyright (C) 1999-2004, Greg Ungerer (gerg@snapgear.com)
  10  *      Copyright (C) 2001-2004, 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 m527x_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_UART1,
  39         },
  40         {
  41                 .mapbase        = MCF_MBAR + MCFUART_BASE3,
  42                 .irq            = MCFINT_VECBASE + MCFINT_UART2,
  43         },
  44         { },
  45 };
  46
  47 static struct platform_device m527x_uart = {
  48         .name                   = "mcfuart",
  49         .id                     = 0,
  50         .dev.platform_data      = m527x_uart_platform,
  51 };
  52
  53 static struct platform_device *m527x_devices[] __initdata = {
  54         &m527x_uart,
  55 };
  56
  57 /***************************************************************************/
  58
  59 #define INTC0   (MCF_MBAR + MCFICM_INTC0)
  60
  61 static void __init m527x_uart_init_line(int line, int irq)
  62 {
  63         u16 sepmask;
  64         u32 imr;
  65
  66         if ((line < 0) || (line > 2))
  67                 return;
  68
  69         /* level 6, line based priority */
  70         writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
  71
  72         imr = readl(INTC0 + MCFINTC_IMRL);
  73         imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
  74         writel(imr, INTC0 + MCFINTC_IMRL);
  75
  76         /*
  77          * External Pin Mask Setting & Enable External Pin for Interface
  78          */
  79         sepmask = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
  80         if (line == 0)
  81                 sepmask |= UART0_ENABLE_MASK;
  82         else if (line == 1)
  83                 sepmask |= UART1_ENABLE_MASK;
  84         else if (line == 2)
  85                 sepmask |= UART2_ENABLE_MASK;
  86         writew(sepmask, MCF_IPSBAR + MCF_GPIO_PAR_UART);
  87 }
  88
  89 static void __init m527x_uarts_init(void)
  90 {
  91         const int nrlines = ARRAY_SIZE(m527x_uart_platform);
  92         int line;
  93
  94         for (line = 0; (line < nrlines); line++)
  95                 m527x_uart_init_line(line, m527x_uart_platform[line].irq);
  96 }
  97
  98 /***************************************************************************/
  99
 100 void mcf_disableall(void)
 101 {
 102         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
 103         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
 104 }
 105
 106 /***************************************************************************/
 107
 108 void mcf_autovector(unsigned int vec)
 109 {
 110         /* Everything is auto-vectored on the 5272 */
 111 }
 112
 113 /***************************************************************************/
 114
 115 void __init config_BSP(char *commandp, int size)
 116 {
 117         mcf_disableall();
 118         mach_reset = coldfire_reset;
 119 }
 120
 121 /***************************************************************************/
 122
 123 static int __init init_BSP(void)
 124 {
 125         m527x_uarts_init();
 126         platform_add_devices(m527x_devices, ARRAY_SIZE(m527x_devices));
 127         return 0;
 128 }
 129
 130 arch_initcall(init_BSP);
 131
 132 /***************************************************************************/