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
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			desc[irq].handle (irq, desc);
81	}
82}
83
84void __init lh7a40x_init_board_irq (void)
85{
86	int irq;
87
88	for (irq = IRQ_KEV7A400_CPLD;
89	     irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
90		set_irq_chip (irq, &kev7a400_cpld_chip);
91		set_irq_handler (irq, handle_edge_irq);
92		set_irq_flags (irq, IRQF_VALID);
93	}
94	set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
95
96		/* Clear all CPLD interrupts */
97	CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
98
99	GPIO_GPIOINTEN = 0;		/* Disable all GPIO interrupts */
100	barrier();
101
102}
103
104MACHINE_START (KEV7A400, "Sharp KEV7a400")
105	/* Maintainer: Marc Singer */
106	.phys_io	= 0x80000000,
107	.io_pg_offst	= ((io_p2v (0x80000000))>>18) & 0xfffc,
108	.boot_params	= 0xc0000100,
109	.map_io		= kev7a400_map_io,
110	.init_irq	= lh7a400_init_irq,
111	.timer		= &lh7a40x_timer,
112MACHINE_END
113