arch/m68knommu/platform/528x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/528x/config.c
   5  *
   6  *      Sub-architcture dependant initialization code for the Motorola
   7  *      5280 and 5282 CPUs.
   8  *
   9  *      Copyright (C) 1999-2003, 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/platform_device.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/spi/flash.h>
  22 #include <linux/io.h>
  23 #include <asm/machdep.h>
  24 #include <asm/coldfire.h>
  25 #include <asm/mcfsim.h>
  26 #include <asm/mcfuart.h>
  27 #include <asm/mcfqspi.h>
  28
  29 /***************************************************************************/
  30
  31 void coldfire_reset(void);
  32
  33 /***************************************************************************/
  34
  35 static struct mcf_platform_uart m528x_uart_platform[] = {
  36         {
  37                 .mapbase        = MCF_MBAR + MCFUART_BASE1,
  38                 .irq            = MCFINT_VECBASE + MCFINT_UART0,
  39         },
  40         {
  41                 .mapbase        = MCF_MBAR + MCFUART_BASE2,
  42                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 1,
  43         },
  44         {
  45                 .mapbase        = MCF_MBAR + MCFUART_BASE3,
  46                 .irq            = MCFINT_VECBASE + MCFINT_UART0 + 2,
  47         },
  48         { },
  49 };
  50
  51 static struct platform_device m528x_uart = {
  52         .name                   = "mcfuart",
  53         .id                     = 0,
  54         .dev.platform_data      = m528x_uart_platform,
  55 };
  56
  57 static struct platform_device *m528x_devices[] __initdata = {
  58         &m528x_uart,
  59 };
  60
  61 /***************************************************************************/
  62
  63 #define INTC0   (MCF_MBAR + MCFICM_INTC0)
  64
  65 static void __init m528x_uart_init_line(int line, int irq)
  66 {
  67         u8 port;
  68         u32 imr;
  69
  70         if ((line < 0) || (line > 2))
  71                 return;
  72
  73         /* level 6, line based priority */
  74         writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
  75
  76         imr = readl(INTC0 + MCFINTC_IMRL);
  77         imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
  78         writel(imr, INTC0 + MCFINTC_IMRL);
  79
  80         /* make sure PUAPAR is set for UART0 and UART1 */
  81         if (line < 2) {
  82                 port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
  83                 port |= (0x03 << (line * 2));
  84                 writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
  85         }
  86 }
  87
  88 static void __init m528x_uarts_init(void)
  89 {
  90         const int nrlines = ARRAY_SIZE(m528x_uart_platform);
  91         int line;
  92
  93         for (line = 0; (line < nrlines); line++)
  94                 m528x_uart_init_line(line, m528x_uart_platform[line].irq);
  95 }
  96
  97 /***************************************************************************/
  98
  99 void mcf_disableall(void)
 100 {
 101         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
 102         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
 103 }
 104
 105 /***************************************************************************/
 106
 107 void mcf_autovector(unsigned int vec)
 108 {
 109         /* Everything is auto-vectored on the 5272 */
 110 }
 111
 112 /***************************************************************************/
 113
 114 void __init config_BSP(char *commandp, int size)
 115 {
 116         mcf_disableall();
 117         mach_reset = coldfire_reset;
 118 }
 119
 120 /***************************************************************************/
 121
 122 static int __init init_BSP(void)
 123 {
 124         m528x_uarts_init();
 125         platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
 126         return 0;
 127 }
 128
 129 arch_initcall(init_BSP);
 130
 131 /***************************************************************************/