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 <asm/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         { IO_VIRT,    IO_PHYS,    IO_SIZE,    MT_DEVICE },
  30         { CPLD_VIRT,  CPLD_PHYS,  CPLD_SIZE,  MT_DEVICE },
  31 };
  32
  33 void __init kev7a400_map_io(void)
  34 {
  35         iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
  36 }
  37
  38 static u16 CPLD_IRQ_mask;       /* Mask for CPLD IRQs, 1 == unmasked */
  39
  40 static void kev7a400_ack_cpld_irq (u32 irq)
  41 {
  42         CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
  43 }
  44
  45 static void kev7a400_mask_cpld_irq (u32 irq)
  46 {
  47         CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
  48         CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  49 }
  50
  51 static void kev7a400_unmask_cpld_irq (u32 irq)
  52 {
  53         CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
  54         CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
  55 }
  56
  57 static struct irqchip kev7a400_cpld_chip = {
  58         .ack    = kev7a400_ack_cpld_irq,
  59         .mask   = kev7a400_mask_cpld_irq,
  60         .unmask = kev7a400_unmask_cpld_irq,
  61 };
  62
  63
  64 static void kev7a400_cpld_handler (unsigned int irq, struct irqdesc *desc,
  65                                   struct pt_regs *regs)
  66 {
  67         u32 mask = CPLD_LATCHED_INTS;
  68         irq = IRQ_KEV7A400_CPLD;
  69         for (; mask; mask >>= 1, ++irq) {
  70                 if (mask & 1)
  71                         desc[irq].handle (irq, desc, regs);
  72         }
  73 }
  74
  75 void __init lh7a40x_init_board_irq (void)
  76 {
  77         int irq;
  78
  79         for (irq = IRQ_KEV7A400_CPLD;
  80              irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
  81                 set_irq_chip (irq, &kev7a400_cpld_chip);
  82                 set_irq_handler (irq, do_edge_IRQ);
  83                 set_irq_flags (irq, IRQF_VALID);
  84         }
  85         set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
  86
  87                 /* Clear all CPLD interrupts */
  88         CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
  89
  90         GPIO_GPIOINTEN = 0;             /* Disable all GPIO interrupts */
  91         barrier();
  92
  93 #if 0
  94         GPIO_INTTYPE1
  95                 = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
  96         GPIO_INTTYPE2 = 0;              /* Falling edge & low-level */
  97         GPIO_GPIOFEOI = 0xff;           /* Clear all GPIO interrupts */
  98         GPIO_GPIOINTEN = 0xff;          /* Enable all GPIO interrupts */
  99
 100         init_FIQ();
 101 #endif
 102 }
 103
 104 MACHINE_START (KEV7A400, "Sharp KEV7a400")
 105         MAINTAINER ("Marc Singer")
 106         BOOT_MEM (0xc0000000, 0x80000000, io_p2v (0x80000000))
 107         BOOT_PARAMS (0xc0000100)
 108         MAPIO (kev7a400_map_io)
 109         INITIRQ (lh7a400_init_irq)
 110         .timer          = &lh7a40x_timer,
 111 MACHINE_END