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} 102 103MACHINE_START (KEV7A400, "Sharp KEV7a400") 104 /* Maintainer: Marc Singer */ 105 .phys_io = 0x80000000, 106 .io_pg_offst = ((io_p2v (0x80000000))>>18) & 0xfffc, 107 .boot_params = 0xc0000100, 108 .map_io = kev7a400_map_io, 109 .init_irq = lh7a400_init_irq, 110 .timer = &lh7a40x_timer, 111MACHINE_END 112