1 /* arch/arm/mach-lh7a40x/arch-kev7a400.c
3 * Copyright (C) 2004 Logic Product Development
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.
11 #include <linux/tty.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/interrupt.h>
16 #include <asm/hardware.h>
17 #include <asm/setup.h>
18 #include <asm/mach-types.h>
19 #include <asm/mach/arch.h>
21 #include <asm/mach/irq.h>
22 #include <asm/mach/map.h>
26 /* This function calls the board specific IRQ initialization function. */
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 },
33 void __init kev7a400_map_io(void)
35 iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
38 static u16 CPLD_IRQ_mask; /* Mask for CPLD IRQs, 1 == unmasked */
40 static void kev7a400_ack_cpld_irq (u32 irq)
42 CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
45 static void kev7a400_mask_cpld_irq (u32 irq)
47 CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
48 CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
51 static void kev7a400_unmask_cpld_irq (u32 irq)
53 CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
54 CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
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,
64 static void kev7a400_cpld_handler (unsigned int irq, struct irqdesc *desc,
67 u32 mask = CPLD_LATCHED_INTS;
68 irq = IRQ_KEV7A400_CPLD;
69 for (; mask; mask >>= 1, ++irq) {
71 desc[irq].handle (irq, desc, regs);
75 void __init lh7a40x_init_board_irq (void)
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);
85 set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
87 /* Clear all CPLD interrupts */
88 CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
90 GPIO_GPIOINTEN = 0; /* Disable all GPIO interrupts */
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 */
104 MACHINE_START (KEV7A400, "Sharp KEV7a400")
105 /* Maintainer: Marc Singer */
106 .phys_ram = 0xc0000000,
107 .phys_io = 0x80000000,
108 .io_pg_offst = ((io_p2v (0x80000000))>>18) & 0xfffc,
109 .boot_params = 0xc0000100,
110 .map_io = kev7a400_map_io,
111 .init_irq = lh7a400_init_irq,
112 .timer = &lh7a40x_timer,