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 resource m523x_fec_resources[] = {
  54         {
  55                 .start          = MCF_MBAR + 0x1000,
  56                 .end            = MCF_MBAR + 0x1000 + 0x7ff,
  57                 .flags          = IORESOURCE_MEM,
  58         },
  59         {
  60                 .start          = 64 + 23,
  61                 .end            = 64 + 23,
  62                 .flags          = IORESOURCE_IRQ,
  63         },
  64         {
  65                 .start          = 64 + 27,
  66                 .end            = 64 + 27,
  67                 .flags          = IORESOURCE_IRQ,
  68         },
  69         {
  70                 .start          = 64 + 29,
  71                 .end            = 64 + 29,
  72                 .flags          = IORESOURCE_IRQ,
  73         },
  74 };
  75
  76 static struct platform_device m523x_fec = {
  77         .name                   = "fec",
  78         .id                     = 0,
  79         .num_resources          = ARRAY_SIZE(m523x_fec_resources),
  80         .resource               = m523x_fec_resources,
  81 };
  82
  83 static struct platform_device *m523x_devices[] __initdata = {
  84         &m523x_uart,
  85         &m523x_fec,
  86 };
  87
  88 /***************************************************************************/
  89
  90 #define INTC0   (MCF_MBAR + MCFICM_INTC0)
  91
  92 static void __init m523x_uart_init_line(int line, int irq)
  93 {
  94         u32 imr;
  95
  96         if ((line < 0) || (line > 2))
  97                 return;
  98
  99         writeb(0x30+line, (INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line));
 100
 101         imr = readl(INTC0 + MCFINTC_IMRL);
 102         imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
 103         writel(imr, INTC0 + MCFINTC_IMRL);
 104 }
 105
 106 static void __init m523x_uarts_init(void)
 107 {
 108         const int nrlines = ARRAY_SIZE(m523x_uart_platform);
 109         int line;
 110
 111         for (line = 0; (line < nrlines); line++)
 112                 m523x_uart_init_line(line, m523x_uart_platform[line].irq);
 113 }
 114
 115 /***************************************************************************/
 116
 117 static void __init m523x_fec_init(void)
 118 {
 119         u32 imr;
 120
 121         /* Unmask FEC interrupts at ColdFire interrupt controller */
 122         writeb(0x28, MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_ICR0 + 23);
 123         writeb(0x27, MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_ICR0 + 27);
 124         writeb(0x26, MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_ICR0 + 29);
 125
 126         imr = readl(MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH);
 127         imr &= ~0xf;
 128         writel(imr, MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH);
 129         imr = readl(MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL);
 130         imr &= ~0xff800001;
 131         writel(imr, MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL);
 132 }
 133
 134 /***************************************************************************/
 135
 136 void mcf_disableall(void)
 137 {
 138         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
 139         *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
 140 }
 141
 142 /***************************************************************************/
 143
 144 void mcf_autovector(unsigned int vec)
 145 {
 146         /* Everything is auto-vectored on the 523x */
 147 }
 148
 149 /***************************************************************************/
 150
 151 void __init config_BSP(char *commandp, int size)
 152 {
 153         mcf_disableall();
 154         mach_reset = coldfire_reset;
 155         m523x_uarts_init();
 156         m523x_fec_init();
 157 }
 158
 159 /***************************************************************************/
 160
 161 static int __init init_BSP(void)
 162 {
 163         platform_add_devices(m523x_devices, ARRAY_SIZE(m523x_devices));
 164         return 0;
 165 }
 166
 167 arch_initcall(init_BSP);
 168
 169 /***************************************************************************/