LXR linux/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
  28static 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
  42void __init kev7a400_map_io(void)
  43{
  44        iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
  45}
  46
  47static u16 CPLD_IRQ_mask;       /* Mask for CPLD IRQs, 1 == unmasked */
  48
  49static void kev7a400_ack_cpld_irq (u32 irq)
  50{
  51        CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
  52}
  53
  54static void kev7a400_mask_cpld_irq (u32 irq)
  55{
  56        CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
  57        CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  58}
  59
  60static void kev7a400_unmask_cpld_irq (u32 irq)
  61{
  62        CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
  63        CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  64}
  65
  66static struct irq_chip kev7a400_cpld_chip = {
  67        .name   = "CPLD",
  68        .ack    = kev7a400_ack_cpld_irq,
  69        .mask   = kev7a400_mask_cpld_irq,
  70        .unmask = kev7a400_unmask_cpld_irq,
  71};
  72
  73
  74static 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
  83void __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
 112MACHINE_START (KEV7A400, "Sharp KEV7a400")
 113        /* Maintainer: Marc Singer */
 114        .phys_io        = 0x80000000,
 115        .io_pg_offst    = ((io_p2v (0x80000000))>>18) & 0xfffc,
 116        .boot_params    = 0xc0000100,
 117        .map_io         = kev7a400_map_io,
 118        .init_irq       = lh7a400_init_irq,
 119        .timer          = &lh7a40x_timer,
 120MACHINE_END
 121