| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |