arch/m68knommu/platform/520x/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *  linux/arch/m68knommu/platform/520x/config.c
   5  *
   6  *  Copyright (C) 2005,      Freescale (www.freescale.com)
   7  *  Copyright (C) 2005,      Intec Automation (mike@steroidmicros.com)
   8  *  Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
   9  *  Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  10  */
  11
  12 /***************************************************************************/
  13
  14 #include <linux/kernel.h>
  15 #include <linux/param.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/io.h>
  19 #include <asm/machdep.h>
  20 #include <asm/coldfire.h>
  21 #include <asm/mcfsim.h>
  22 #include <asm/mcfuart.h>
  23
  24 /***************************************************************************/
  25
  26 void coldfire_reset(void);
  27
  28 /***************************************************************************/
  29
  30 static struct mcf_platform_uart m520x_uart_platform[] = {
  31         {
  32                 .mapbase        = MCF_MBAR + MCFUART_BASE1,
  33                 .irq            = MCFINT_VECBASE + MCFINT_UART0,
  34         },
  35         {
  36                 .mapbase        = MCF_MBAR + MCFUART_BASE2,
  37                 .irq            = MCFINT_VECBASE + MCFINT_UART1,
  38         },
  39         {
  40                 .mapbase        = MCF_MBAR + MCFUART_BASE3,
  41                 .irq            = MCFINT_VECBASE + MCFINT_UART2,
  42         },
  43         { },
  44 };
  45
  46 static struct platform_device m520x_uart = {
  47         .name                   = "mcfuart",
  48         .id                     = 0,
  49         .dev.platform_data      = m520x_uart_platform,
  50 };
  51
  52 static struct platform_device *m520x_devices[] __initdata = {
  53         &m520x_uart,
  54 };
  55
  56 /***************************************************************************/
  57
  58 #define INTC0   (MCF_MBAR + MCFICM_INTC0)
  59
  60 static void __init m520x_uart_init_line(int line, int irq)
  61 {
  62         u32 imr;
  63         u16 par;
  64         u8 par2;
  65
  66         writeb(0x03, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
  67
  68         imr = readl(INTC0 + MCFINTC_IMRL);
  69         imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
  70         writel(imr, INTC0 + MCFINTC_IMRL);
  71
  72         switch (line) {
  73         case 0:
  74                 par = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
  75                 par |= MCF_GPIO_PAR_UART_PAR_UTXD0 |
  76                        MCF_GPIO_PAR_UART_PAR_URXD0;
  77                 writew(par, MCF_IPSBAR + MCF_GPIO_PAR_UART);
  78                 break;
  79         case 1:
  80                 par = readw(MCF_IPSBAR + MCF_GPIO_PAR_UART);
  81                 par |= MCF_GPIO_PAR_UART_PAR_UTXD1 |
  82                        MCF_GPIO_PAR_UART_PAR_URXD1;
  83                 writew(par, MCF_IPSBAR + MCF_GPIO_PAR_UART);
  84                 break;
  85         case 2:
  86                 par2 = readb(MCF_IPSBAR + MCF_GPIO_PAR_FECI2C);
  87                 par2 &= ~0x0F;
  88                 par2 |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 |
  89                         MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
  90                 writeb(par2, MCF_IPSBAR + MCF_GPIO_PAR_FECI2C);
  91                 break;
  92         }
  93 }
  94
  95 static void __init m520x_uarts_init(void)
  96 {
  97         const int nrlines = ARRAY_SIZE(m520x_uart_platform);
  98         int line;
  99
 100         for (line = 0; (line < nrlines); line++)
 101                 m520x_uart_init_line(line, m520x_uart_platform[line].irq);
 102 }
 103
 104 /***************************************************************************/
 105
 106 /*
 107  *  Program the vector to be an auto-vectored.
 108  */
 109
 110 void mcf_autovector(unsigned int vec)
 111 {
 112     /* Everything is auto-vectored on the 520x devices */
 113 }
 114
 115 /***************************************************************************/
 116
 117 void __init config_BSP(char *commandp, int size)
 118 {
 119         mach_reset = coldfire_reset;
 120         m520x_uarts_init();
 121 }
 122
 123 /***************************************************************************/
 124
 125 static int __init init_BSP(void)
 126 {
 127         platform_add_devices(m520x_devices, ARRAY_SIZE(m520x_devices));
 128         return 0;
 129 }
 130
 131 arch_initcall(init_BSP);
 132
 133 /***************************************************************************/