arch/arm/mach-lh7a40x/arch-kev7a400.c

   1 /* arch/arm/mach-lh7a40x/arch-kev7a400.c
   2  *
   3  *  Copyright (C) 2004 Logic Product Development
   4  *
   5  *  This program is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU General Public License
   7  *  version 2 as published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/tty.h>
  12 #include <linux/init.h>
  13 #include <linux/device.h>
  14 #include <linux/interrupt.h>
  15
  16 #include <mach/hardware.h>
  17 #include <asm/setup.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/irq.h>
  21 #include <asm/mach/irq.h>
  22 #include <asm/mach/map.h>
  23
  24 #include "common.h"
  25
  26       /* This function calls the board specific IRQ initialization function. */
  27
  28 static struct map_desc kev7a400_io_desc[] __initdata = {
  29         {
  30                 .virtual        = IO_VIRT,
  31                 .pfn            = __phys_to_pfn(IO_PHYS),
  32                 .length         = IO_SIZE,
  33                 .type           = MT_DEVICE
  34         }, {
  35                 .virtual        = CPLD_VIRT,
  36                 .pfn            = __phys_to_pfn(CPLD_PHYS),
  37                 .length         = CPLD_SIZE,
  38                 .type           = MT_DEVICE
  39         }
  40 };
  41
  42 void __init kev7a400_map_io(void)
  43 {
  44         iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
  45 }
  46
  47 static u16 CPLD_IRQ_mask;       /* Mask for CPLD IRQs, 1 == unmasked */
  48
  49 static void kev7a400_ack_cpld_irq(struct irq_data *d)
  50 {
  51         CPLD_CL_INT = 1 << (d->irq - IRQ_KEV7A400_CPLD);
  52 }
  53
  54 static void kev7a400_mask_cpld_irq(struct irq_data *d)
  55 {
  56         CPLD_IRQ_mask &= ~(1 << (d->irq - IRQ_KEV7A400_CPLD));
  57         CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  58 }
  59
  60 static void kev7a400_unmask_cpld_irq(struct irq_data *d)
  61 {
  62         CPLD_IRQ_mask |= 1 << (d->irq - IRQ_KEV7A400_CPLD);
  63         CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  64 }
  65
  66 static struct irq_chip kev7a400_cpld_chip = {
  67         .name           = "CPLD",
  68         .irq_ack        = kev7a400_ack_cpld_irq,
  69         .irq_mask       = kev7a400_mask_cpld_irq,
  70         .irq_unmask     = kev7a400_unmask_cpld_irq,
  71 };
  72
  73
  74 static void kev7a400_cpld_handler (unsigned int irq, struct irq_desc *desc)
  75 {
  76         u32 mask = CPLD_LATCHED_INTS;
  77         irq = IRQ_KEV7A400_CPLD;
  78         for (; mask; mask >>= 1, ++irq)
  79                 if (mask & 1)
  80                         generic_handle_irq(irq);
  81 }
  82
  83 void __init lh7a40x_init_board_irq (void)
  84 {
  85         int irq;
  86
  87         for (irq = IRQ_KEV7A400_CPLD;
  88              irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
  89                 set_irq_chip (irq, &kev7a400_cpld_chip);
  90                 set_irq_handler (irq, handle_edge_irq);
  91                 set_irq_flags (irq, IRQF_VALID);
  92         }
  93         set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
  94
  95                 /* Clear all CPLD interrupts */
  96         CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
  97
  98         GPIO_GPIOINTEN = 0;             /* Disable all GPIO interrupts */
  99         barrier();
 100
 101 #if 0
 102         GPIO_INTTYPE1
 103                 = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
 104         GPIO_INTTYPE2 = 0;              /* Falling edge & low-level */
 105         GPIO_GPIOFEOI = 0xff;           /* Clear all GPIO interrupts */
 106         GPIO_GPIOINTEN = 0xff;          /* Enable all GPIO interrupts */
 107
 108         init_FIQ();
 109 #endif
 110 }
 111
 112 MACHINE_START (KEV7A400, "Sharp KEV7a400")
 113         /* Maintainer: Marc Singer */
 114         .boot_params    = 0xc0000100,
 115         .map_io         = kev7a400_map_io,
 116         .init_irq       = lh7a400_init_irq,
 117         .timer          = &lh7a40x_timer,
 118 MACHINE_END