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arch-kev7a400.c

/* arch/arm/mach-lh7a40x/arch-kev7a400.c
 *
 *  Copyright (C) 2004 Logic Product Development
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  version 2 as published by the Free Software Foundation.
 *
 */

#include <linux/tty.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>

#include <mach/hardware.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>

#include "common.h"

      /* This function calls the board specific IRQ initialization function. */

static struct map_desc kev7a400_io_desc[] __initdata = {
      {
            .virtual    = IO_VIRT,
            .pfn        = __phys_to_pfn(IO_PHYS),
            .length           = IO_SIZE,
            .type       = MT_DEVICE
      }, {
            .virtual    = CPLD_VIRT,
            .pfn        = __phys_to_pfn(CPLD_PHYS),
            .length           = CPLD_SIZE,
            .type       = MT_DEVICE
      }
};

void __init kev7a400_map_io(void)
{
      iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
}

static u16 CPLD_IRQ_mask;     /* Mask for CPLD IRQs, 1 == unmasked */

static void kev7a400_ack_cpld_irq(struct irq_data *d)
{
      CPLD_CL_INT = 1 << (d->irq - IRQ_KEV7A400_CPLD);
}

static void kev7a400_mask_cpld_irq(struct irq_data *d)
{
      CPLD_IRQ_mask &= ~(1 << (d->irq - IRQ_KEV7A400_CPLD));
      CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
}

static void kev7a400_unmask_cpld_irq(struct irq_data *d)
{
      CPLD_IRQ_mask |= 1 << (d->irq - IRQ_KEV7A400_CPLD);
      CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
}

static struct irq_chip kev7a400_cpld_chip = {
      .name       = "CPLD",
      .irq_ack    = kev7a400_ack_cpld_irq,
      .irq_mask   = kev7a400_mask_cpld_irq,
      .irq_unmask = kev7a400_unmask_cpld_irq,
};


static void kev7a400_cpld_handler (unsigned int irq, struct irq_desc *desc)
{
      u32 mask = CPLD_LATCHED_INTS;
      irq = IRQ_KEV7A400_CPLD;
      for (; mask; mask >>= 1, ++irq)
            if (mask & 1)
                  generic_handle_irq(irq);
}

void __init lh7a40x_init_board_irq (void)
{
      int irq;

      for (irq = IRQ_KEV7A400_CPLD;
           irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
            set_irq_chip (irq, &kev7a400_cpld_chip);
            set_irq_handler (irq, handle_edge_irq);
            set_irq_flags (irq, IRQF_VALID);
      }
      set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);

            /* Clear all CPLD interrupts */
      CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */

      GPIO_GPIOINTEN = 0;           /* Disable all GPIO interrupts */
      barrier();

#if 0
      GPIO_INTTYPE1
            = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
      GPIO_INTTYPE2 = 0;            /* Falling edge & low-level */
      GPIO_GPIOFEOI = 0xff;         /* Clear all GPIO interrupts */
      GPIO_GPIOINTEN = 0xff;        /* Enable all GPIO interrupts */

      init_FIQ();
#endif
}

MACHINE_START (KEV7A400, "Sharp KEV7a400")
      /* Maintainer: Marc Singer */
      .boot_params      = 0xc0000100,
      .map_io           = kev7a400_map_io,
      .init_irq   = lh7a400_init_irq,
      .timer            = &lh7a40x_timer,
MACHINE_END

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