1/*
2 *  linux/arch/arm/mm/mm-lusl7200.c
3 *
4 *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
5 *
6 *  Extra MM routines for L7200 architecture
7 */
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/irq.h>
11#include <linux/device.h>
12
13#include <asm/types.h>
14#include <asm/irq.h>
15#include <asm/mach-types.h>
16#include <asm/hardware.h>
17#include <asm/page.h>
18
19#include <asm/mach/arch.h>
20#include <asm/mach/map.h>
21#include <asm/mach/irq.h>
22
23/*
24 * IRQ base register
25 */
26#define	IRQ_BASE	(IO_BASE_2 + 0x1000)
27
28/*
29 * Normal IRQ registers
30 */
31#define IRQ_STATUS	(*(volatile unsigned long *) (IRQ_BASE + 0x000))
32#define IRQ_RAWSTATUS	(*(volatile unsigned long *) (IRQ_BASE + 0x004))
33#define IRQ_ENABLE	(*(volatile unsigned long *) (IRQ_BASE + 0x008))
34#define IRQ_ENABLECLEAR	(*(volatile unsigned long *) (IRQ_BASE + 0x00c))
35#define IRQ_SOFT	(*(volatile unsigned long *) (IRQ_BASE + 0x010))
36#define IRQ_SOURCESEL	(*(volatile unsigned long *) (IRQ_BASE + 0x018))
37
38/*
39 * Fast IRQ registers
40 */
41#define FIQ_STATUS	(*(volatile unsigned long *) (IRQ_BASE + 0x100))
42#define FIQ_RAWSTATUS	(*(volatile unsigned long *) (IRQ_BASE + 0x104))
43#define FIQ_ENABLE	(*(volatile unsigned long *) (IRQ_BASE + 0x108))
44#define FIQ_ENABLECLEAR	(*(volatile unsigned long *) (IRQ_BASE + 0x10c))
45#define FIQ_SOFT	(*(volatile unsigned long *) (IRQ_BASE + 0x110))
46#define FIQ_SOURCESEL	(*(volatile unsigned long *) (IRQ_BASE + 0x118))
47
48static void l7200_mask_irq(unsigned int irq)
49{
50	IRQ_ENABLECLEAR = 1 << irq;
51}
52
53static void l7200_unmask_irq(unsigned int irq)
54{
55	IRQ_ENABLE = 1 << irq;
56}
57
58static struct irq_chip l7200_irq_chip = {
59	.ack		= l7200_mask_irq,
60	.mask		= l7200_mask_irq,
61	.unmask		= l7200_unmask_irq
62};
63
64static void __init l7200_init_irq(void)
65{
66	int irq;
67
68	IRQ_ENABLECLEAR = 0xffffffff;	/* clear all interrupt enables */
69	FIQ_ENABLECLEAR = 0xffffffff;	/* clear all fast interrupt enables */
70
71	for (irq = 0; irq < NR_IRQS; irq++) {
72		set_irq_chip(irq, &l7200_irq_chip);
73		set_irq_flags(irq, IRQF_VALID);
74		set_irq_handler(irq, handle_level_irq);
75	}
76
77	init_FIQ();
78}
79
80static struct map_desc l7200_io_desc[] __initdata = {
81	{ IO_BASE,	IO_START,	IO_SIZE,	MT_DEVICE },
82	{ IO_BASE_2,	IO_START_2,	IO_SIZE_2,	MT_DEVICE },
83	{ AUX_BASE,     AUX_START,      AUX_SIZE,       MT_DEVICE },
84	{ FLASH1_BASE,  FLASH1_START,   FLASH1_SIZE,    MT_DEVICE },
85	{ FLASH2_BASE,  FLASH2_START,   FLASH2_SIZE,    MT_DEVICE }
86};
87
88static void __init l7200_map_io(void)
89{
90	iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
91}
92
93MACHINE_START(L7200, "LinkUp Systems L7200")
94	/* Maintainer: Steve Hill / Scott McConnell */
95	.phys_io	= 0x80040000,
96	.io_pg_offst	= ((0xd0000000) >> 18) & 0xfffc,
97	.map_io		= l7200_map_io,
98	.init_irq	= l7200_init_irq,
99MACHINE_END
100