1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
|
/* linux/arch/arm/mach-s3c2443/irq.c
*
* Copyright (c) 2007 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/regs-irq.h>
#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/irq.h>
#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
static inline void s3c2443_irq_demux(unsigned int irq, unsigned int len)
{
unsigned int subsrc, submsk;
unsigned int end;
/* read the current pending interrupts, and the mask
* for what it is available */
subsrc = __raw_readl(S3C2410_SUBSRCPND);
submsk = __raw_readl(S3C2410_INTSUBMSK);
subsrc &= ~submsk;
subsrc >>= (irq - S3C2410_IRQSUB(0));
subsrc &= (1 << len)-1;
end = len + irq;
for (; irq < end && subsrc; irq++) {
if (subsrc & 1)
generic_handle_irq(irq);
subsrc >>= 1;
}
}
/* WDT/AC97 sub interrupts */
static void s3c2443_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)
{
s3c2443_irq_demux(IRQ_S3C2443_WDT, 4);
}
#define INTMSK_WDTAC97 (1UL << (IRQ_WDT - IRQ_EINT0))
#define SUBMSK_WDTAC97 INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)
static void s3c2443_irq_wdtac97_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
}
static void s3c2443_irq_wdtac97_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);
}
static void s3c2443_irq_wdtac97_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);
}
static struct irq_chip s3c2443_irq_wdtac97 = {
.irq_mask = s3c2443_irq_wdtac97_mask,
.irq_unmask = s3c2443_irq_wdtac97_unmask,
.irq_ack = s3c2443_irq_wdtac97_ack,
};
/* LCD sub interrupts */
static void s3c2443_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)
{
s3c2443_irq_demux(IRQ_S3C2443_LCD1, 4);
}
#define INTMSK_LCD (1UL << (IRQ_LCD - IRQ_EINT0))
#define SUBMSK_LCD INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)
static void s3c2443_irq_lcd_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);
}
static void s3c2443_irq_lcd_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_LCD);
}
static void s3c2443_irq_lcd_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);
}
static struct irq_chip s3c2443_irq_lcd = {
.irq_mask = s3c2443_irq_lcd_mask,
.irq_unmask = s3c2443_irq_lcd_unmask,
.irq_ack = s3c2443_irq_lcd_ack,
};
/* DMA sub interrupts */
static void s3c2443_irq_demux_dma(unsigned int irq, struct irq_desc *desc)
{
s3c2443_irq_demux(IRQ_S3C2443_DMA0, 6);
}
#define INTMSK_DMA (1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))
#define SUBMSK_DMA INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)
static void s3c2443_irq_dma_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);
}
static void s3c2443_irq_dma_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_DMA);
}
static void s3c2443_irq_dma_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);
}
static struct irq_chip s3c2443_irq_dma = {
.irq_mask = s3c2443_irq_dma_mask,
.irq_unmask = s3c2443_irq_dma_unmask,
.irq_ack = s3c2443_irq_dma_ack,
};
/* UART3 sub interrupts */
static void s3c2443_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)
{
s3c2443_irq_demux(IRQ_S3C2443_RX3, 3);
}
#define INTMSK_UART3 (1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))
#define SUBMSK_UART3 (0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))
static void s3c2443_irq_uart3_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);
}
static void s3c2443_irq_uart3_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_UART3);
}
static void s3c2443_irq_uart3_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);
}
static struct irq_chip s3c2443_irq_uart3 = {
.irq_mask = s3c2443_irq_uart3_mask,
.irq_unmask = s3c2443_irq_uart3_unmask,
.irq_ack = s3c2443_irq_uart3_ack,
};
/* CAM sub interrupts */
static void s3c2443_irq_demux_cam(unsigned int irq, struct irq_desc *desc)
{
s3c2443_irq_demux(IRQ_S3C2440_CAM_C, 4);
}
#define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
#define SUBMSK_CAM INTMSK(IRQ_S3C2440_CAM_C, IRQ_S3C2440_CAM_P)
static void s3c2443_irq_cam_mask(struct irq_data *data)
{
s3c_irqsub_mask(data->irq, INTMSK_CAM, SUBMSK_CAM);
}
static void s3c2443_irq_cam_unmask(struct irq_data *data)
{
s3c_irqsub_unmask(data->irq, INTMSK_CAM);
}
static void s3c2443_irq_cam_ack(struct irq_data *data)
{
s3c_irqsub_maskack(data->irq, INTMSK_CAM, SUBMSK_CAM);
}
static struct irq_chip s3c2443_irq_cam = {
.irq_mask = s3c2443_irq_cam_mask,
.irq_unmask = s3c2443_irq_cam_unmask,
.irq_ack = s3c2443_irq_cam_ack,
};
/* IRQ initialisation code */
static int __init s3c2443_add_sub(unsigned int base,
void (*demux)(unsigned int,
struct irq_desc *),
struct irq_chip *chip,
unsigned int start, unsigned int end)
{
unsigned int irqno;
irq_set_chip(base, &s3c_irq_level_chip);
irq_set_handler(base, handle_level_irq);
irq_set_chained_handler(base, demux);
for (irqno = start; irqno <= end; irqno++) {
irq_set_chip(irqno, chip);
irq_set_handler(irqno, handle_level_irq);
set_irq_flags(irqno, IRQF_VALID);
}
return 0;
}
static int __init s3c2443_irq_add(struct sys_device *sysdev)
{
printk("S3C2443: IRQ Support\n");
s3c2443_add_sub(IRQ_CAM, s3c2443_irq_demux_cam, &s3c2443_irq_cam,
IRQ_S3C2440_CAM_C, IRQ_S3C2440_CAM_P);
s3c2443_add_sub(IRQ_LCD, s3c2443_irq_demux_lcd, &s3c2443_irq_lcd,
IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4);
s3c2443_add_sub(IRQ_S3C2443_DMA, s3c2443_irq_demux_dma,
&s3c2443_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);
s3c2443_add_sub(IRQ_S3C2443_UART3, s3c2443_irq_demux_uart3,
&s3c2443_irq_uart3,
IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);
s3c2443_add_sub(IRQ_WDT, s3c2443_irq_demux_wdtac97,
&s3c2443_irq_wdtac97,
IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
return 0;
}
static struct sysdev_driver s3c2443_irq_driver = {
.add = s3c2443_irq_add,
};
static int __init s3c2443_irq_init(void)
{
return sysdev_driver_register(&s3c2443_sysclass, &s3c2443_irq_driver);
}
arch_initcall(s3c2443_irq_init);
|
