mirror of https://gitee.com/openkylin/linux.git
122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/* arch/arm/mach-lh7a40x/arch-kev7a400.c
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*
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* Copyright (C) 2004 Logic Product Development
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*/
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#include <linux/tty.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <asm/hardware.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/map.h>
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#include "common.h"
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/* This function calls the board specific IRQ initialization function. */
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static struct map_desc kev7a400_io_desc[] __initdata = {
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{
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.virtual = IO_VIRT,
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.pfn = __phys_to_pfn(IO_PHYS),
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.length = IO_SIZE,
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.type = MT_DEVICE
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}, {
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.virtual = CPLD_VIRT,
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.pfn = __phys_to_pfn(CPLD_PHYS),
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.length = CPLD_SIZE,
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.type = MT_DEVICE
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}
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};
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void __init kev7a400_map_io(void)
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{
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iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
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}
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static u16 CPLD_IRQ_mask; /* Mask for CPLD IRQs, 1 == unmasked */
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static void kev7a400_ack_cpld_irq (u32 irq)
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{
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CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
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}
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static void kev7a400_mask_cpld_irq (u32 irq)
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{
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CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
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CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
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}
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static void kev7a400_unmask_cpld_irq (u32 irq)
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{
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CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
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CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
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}
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static struct irq_chip kev7a400_cpld_chip = {
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.name = "CPLD",
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.ack = kev7a400_ack_cpld_irq,
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.mask = kev7a400_mask_cpld_irq,
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.unmask = kev7a400_unmask_cpld_irq,
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};
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static void kev7a400_cpld_handler (unsigned int irq, struct irqdesc *desc)
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{
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u32 mask = CPLD_LATCHED_INTS;
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irq = IRQ_KEV7A400_CPLD;
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for (; mask; mask >>= 1, ++irq) {
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if (mask & 1)
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desc[irq].handle (irq, desc);
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}
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}
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void __init lh7a40x_init_board_irq (void)
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{
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int irq;
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for (irq = IRQ_KEV7A400_CPLD;
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irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
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set_irq_chip (irq, &kev7a400_cpld_chip);
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set_irq_handler (irq, do_edge_IRQ);
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set_irq_flags (irq, IRQF_VALID);
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}
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set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
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/* Clear all CPLD interrupts */
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CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
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GPIO_GPIOINTEN = 0; /* Disable all GPIO interrupts */
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barrier();
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#if 0
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GPIO_INTTYPE1
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= (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
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GPIO_INTTYPE2 = 0; /* Falling edge & low-level */
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GPIO_GPIOFEOI = 0xff; /* Clear all GPIO interrupts */
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GPIO_GPIOINTEN = 0xff; /* Enable all GPIO interrupts */
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init_FIQ();
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#endif
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}
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MACHINE_START (KEV7A400, "Sharp KEV7a400")
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/* Maintainer: Marc Singer */
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.phys_io = 0x80000000,
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.io_pg_offst = ((io_p2v (0x80000000))>>18) & 0xfffc,
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.boot_params = 0xc0000100,
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.map_io = kev7a400_map_io,
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.init_irq = lh7a400_init_irq,
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.timer = &lh7a40x_timer,
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MACHINE_END
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