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Merge branches 'perf-fixes-for-linus' and 'x86-fixes-for-linus' of git://git.kernel...
[net-next-2.6.git] / arch / arm / mach-s3c2416 / irq.c
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f1290a49
YK		 1/* linux/arch/arm/mach-s3c2416/irq.c
2 *
3 * Copyright (c) 2009 Yauhen Kharuzhy <jekhor@gmail.com>,
4 * as part of OpenInkpot project
5 * Copyright (c) 2009 Promwad Innovation Company
6 * Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22*/
23
24#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/interrupt.h>
27#include <linux/ioport.h>
28#include <linux/sysdev.h>
29#include <linux/io.h>
30
31#include <mach/hardware.h>
32#include <asm/irq.h>
33
34#include <asm/mach/irq.h>
35
36#include <mach/regs-irq.h>
37#include <mach/regs-gpio.h>
38
39#include <plat/cpu.h>
40#include <plat/pm.h>
41#include <plat/irq.h>
42
43#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
44
45static inline void s3c2416_irq_demux(unsigned int irq, unsigned int len)
46{
47 unsigned int subsrc, submsk;
48 unsigned int end;
49
50 /* read the current pending interrupts, and the mask
51 * for what it is available */
52
53 subsrc = __raw_readl(S3C2410_SUBSRCPND);
54 submsk = __raw_readl(S3C2410_INTSUBMSK);
55
56 subsrc &= ~submsk;
57 subsrc >>= (irq - S3C2410_IRQSUB(0));
58 subsrc &= (1 << len)-1;
59
60 end = len + irq;
61
62 for (; irq < end && subsrc; irq++) {
63 if (subsrc & 1)
64 generic_handle_irq(irq);
65
66 subsrc >>= 1;
67 }
68}
69
70/* WDT/AC97 sub interrupts */
71
72static void s3c2416_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)
73{
74 s3c2416_irq_demux(IRQ_S3C2443_WDT, 4);
75}
76
77#define INTMSK_WDTAC97 (1UL << (IRQ_WDT - IRQ_EINT0))
78#define SUBMSK_WDTAC97 INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)
79
80static void s3c2416_irq_wdtac97_mask(unsigned int irqno)
81{
82 s3c_irqsub_mask(irqno, INTMSK_WDTAC97, SUBMSK_WDTAC97);
83}
84
85static void s3c2416_irq_wdtac97_unmask(unsigned int irqno)
86{
87 s3c_irqsub_unmask(irqno, INTMSK_WDTAC97);
88}
89
90static void s3c2416_irq_wdtac97_ack(unsigned int irqno)
91{
92 s3c_irqsub_maskack(irqno, INTMSK_WDTAC97, SUBMSK_WDTAC97);
93}
94
95static struct irq_chip s3c2416_irq_wdtac97 = {
96 .mask = s3c2416_irq_wdtac97_mask,
97 .unmask = s3c2416_irq_wdtac97_unmask,
98 .ack = s3c2416_irq_wdtac97_ack,
99};
100
101
102/* LCD sub interrupts */
103
104static void s3c2416_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)
105{
106 s3c2416_irq_demux(IRQ_S3C2443_LCD1, 4);
107}
108
109#define INTMSK_LCD (1UL << (IRQ_LCD - IRQ_EINT0))
110#define SUBMSK_LCD INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)
111
112static void s3c2416_irq_lcd_mask(unsigned int irqno)
113{
114 s3c_irqsub_mask(irqno, INTMSK_LCD, SUBMSK_LCD);
115}
116
117static void s3c2416_irq_lcd_unmask(unsigned int irqno)
118{
119 s3c_irqsub_unmask(irqno, INTMSK_LCD);
120}
121
122static void s3c2416_irq_lcd_ack(unsigned int irqno)
123{
124 s3c_irqsub_maskack(irqno, INTMSK_LCD, SUBMSK_LCD);
125}
126
127static struct irq_chip s3c2416_irq_lcd = {
128 .mask = s3c2416_irq_lcd_mask,
129 .unmask = s3c2416_irq_lcd_unmask,
130 .ack = s3c2416_irq_lcd_ack,
131};
132
133
134/* DMA sub interrupts */
135
136static void s3c2416_irq_demux_dma(unsigned int irq, struct irq_desc *desc)
137{
138 s3c2416_irq_demux(IRQ_S3C2443_DMA0, 6);
139}
140
141#define INTMSK_DMA (1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))
142#define SUBMSK_DMA INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)
143
144
145static void s3c2416_irq_dma_mask(unsigned int irqno)
146{
147 s3c_irqsub_mask(irqno, INTMSK_DMA, SUBMSK_DMA);
148}
149
150static void s3c2416_irq_dma_unmask(unsigned int irqno)
151{
152 s3c_irqsub_unmask(irqno, INTMSK_DMA);
153}
154
155static void s3c2416_irq_dma_ack(unsigned int irqno)
156{
157 s3c_irqsub_maskack(irqno, INTMSK_DMA, SUBMSK_DMA);
158}
159
160static struct irq_chip s3c2416_irq_dma = {
161 .mask = s3c2416_irq_dma_mask,
162 .unmask = s3c2416_irq_dma_unmask,
163 .ack = s3c2416_irq_dma_ack,
164};
165
166
167/* UART3 sub interrupts */
168
169static void s3c2416_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)
170{
171 s3c2416_irq_demux(IRQ_S3C2443_UART3, 3);
172}
173
174#define INTMSK_UART3 (1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))
175#define SUBMSK_UART3 (0xf << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))
176
177
178static void s3c2416_irq_uart3_mask(unsigned int irqno)
179{
180 s3c_irqsub_mask(irqno, INTMSK_UART3, SUBMSK_UART3);
181}
182
183static void s3c2416_irq_uart3_unmask(unsigned int irqno)
184{
185 s3c_irqsub_unmask(irqno, INTMSK_UART3);
186}
187
188static void s3c2416_irq_uart3_ack(unsigned int irqno)
189{
190 s3c_irqsub_maskack(irqno, INTMSK_UART3, SUBMSK_UART3);
191}
192
193static struct irq_chip s3c2416_irq_uart3 = {
194 .mask = s3c2416_irq_uart3_mask,
195 .unmask = s3c2416_irq_uart3_unmask,
196 .ack = s3c2416_irq_uart3_ack,
197};
198
199
200/* IRQ initialisation code */
201
202static int __init s3c2416_add_sub(unsigned int base,
203 void (*demux)(unsigned int,
204 struct irq_desc *),
205 struct irq_chip *chip,
206 unsigned int start, unsigned int end)
207{
208 unsigned int irqno;
209
210 set_irq_chip(base, &s3c_irq_level_chip);
211 set_irq_handler(base, handle_level_irq);
212 set_irq_chained_handler(base, demux);
213
214 for (irqno = start; irqno <= end; irqno++) {
215 set_irq_chip(irqno, chip);
216 set_irq_handler(irqno, handle_level_irq);
217 set_irq_flags(irqno, IRQF_VALID);
218 }
219
220 return 0;
221}
222
223static int __init s3c2416_irq_add(struct sys_device *sysdev)
224{
225 printk(KERN_INFO "S3C2416: IRQ Support\n");
226
227 s3c2416_add_sub(IRQ_LCD, s3c2416_irq_demux_lcd, &s3c2416_irq_lcd,
228 IRQ_S3C2443_LCD2, IRQ_S3C2443_LCD4);
229
230 s3c2416_add_sub(IRQ_S3C2443_DMA, s3c2416_irq_demux_dma,
231 &s3c2416_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);
232
233 s3c2416_add_sub(IRQ_S3C2443_UART3, s3c2416_irq_demux_uart3,
234 &s3c2416_irq_uart3,
235 IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);
236
237 s3c2416_add_sub(IRQ_WDT, s3c2416_irq_demux_wdtac97,
238 &s3c2416_irq_wdtac97,
239 IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
240
241 return 0;
242}
243
244static struct sysdev_driver s3c2416_irq_driver = {
245 .add = s3c2416_irq_add,
6436b6a7
AK		 246 .suspend = s3c24xx_irq_suspend,
247 .resume = s3c24xx_irq_resume,
f1290a49
YK		 248};
249
250static int __init s3c2416_irq_init(void)
251{
252 return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_irq_driver);
253}
254
255arch_initcall(s3c2416_irq_init);
256
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