2 * linux/arch/armnommu/mach-s5c7375/irq.c
4 * Copyright (C) 2003 SAMSUNG ELECTRONICS
5 * Hyok S. Choi (hyok.choi@samsung.com)
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/types.h>
22 #include <linux/sched.h>
23 #include <linux/interrupt.h>
24 #include <linux/types.h>
25 #include <linux/kernel.h>
26 #include <linux/init.h>
27 #include <linux/list.h>
28 #include <linux/device.h>
29 #include <linux/slab.h>
30 #include <linux/string.h>
31 #include <linux/sysdev.h>
33 #include <asm/hardware.h>
36 #include <asm/setup.h>
37 #include <asm/mach-types.h>
39 #include <asm/mach/arch.h>
40 #include <asm/mach/irq.h>
41 #include <asm/mach/map.h>
43 void __inline__
s5c7375_mask_irq(unsigned int irq
)
45 rINTMSK
|= ((unsigned long) 1 << irq
);
48 void __inline__
s5c7375_unmask_irq(unsigned int irq
)
50 rINTMSK
&= ~((unsigned long)1 << irq
);
53 void __inline__
s5c7375_mask_ack_irq(unsigned int irq
)
55 s5c7375_mask_irq(irq
);
58 void __inline__
s5c7375_clear_pb(unsigned int irq
)
60 rIRQISPC
= (0x00000001<<irq
); /* Clear pending bit */
61 rIRQISPC
; /* WriteBack */
65 /* YOU CAN CHANGE THIS ROUTINE FOR SPEED UP */
66 __inline__
unsigned int fixup_irq (int irq
)
68 s5c7375_clear_pb(irq
);
72 static struct irqchip s5c7375_chip
= {
73 .ack
= s5c7375_clear_pb
,
74 .mask
= s5c7375_mask_irq
,
75 .unmask
= s5c7375_unmask_irq
,
79 static unsigned long ic_irq_enable
;
81 static int irq_suspend(struct sys_device
*dev
, u32 state
)
86 static int irq_resume(struct sys_device
*dev
)
88 /* disable all irq sources */
92 #define irq_suspend NULL
93 #define irq_resume NULL
96 static struct sysdev_class irq_class
= {
98 .suspend
= irq_suspend
,
102 static struct sys_device irq_device
= {
107 static int __init
irq_init_sysfs(void)
109 int ret
= sysdev_class_register(&irq_class
);
111 ret
= sysdev_register(&irq_device
);
115 device_initcall(irq_init_sysfs
);
117 void __init
s5c7375_init_irq(void)
121 /* Disable all IRQs */
123 rINTMSK
= 0xffffffff; /* all masked */
125 * All IRQs are IRQ, not FIQ
126 * Write only one register,
129 *******************************************/
130 rINTMOD
= 0x00000000;
132 for (irq
= 0; irq
< NR_IRQS
; irq
++) {
133 set_irq_chip(irq
, &s5c7375_chip
);
134 set_irq_handler(irq
, do_level_IRQ
);
135 set_irq_flags(irq
, IRQF_VALID
| IRQF_PROBE
);
137 rINTCON
= 0x0; // all interrupt is disabled
138 // rINTCON = 0xD; // vectored mode
139 DisableFIQ(); // fiq is disabled
140 #ifndef CONFIG_S5C7375VM
141 EnableIRQ(); // irq is enabled
145 DisableGMask(); // global mask is disabled