Merge ../linus
[linux-drm-fsl-dcu.git] / arch / arm / mach-s3c2410 / irq.c
1 /* linux/arch/arm/mach-s3c2410/irq.c
2  *
3  * Copyright (c) 2003,2004 Simtec Electronics
4  *      Ben Dooks <ben@simtec.co.uk>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  *
20  * Changelog:
21  *
22  *   22-Jul-2004  Ben Dooks <ben@simtec.co.uk>
23  *                Fixed compile warnings
24  *
25  *   22-Jul-2004  Roc Wu <cooloney@yahoo.com.cn>
26  *                Fixed s3c_extirq_type
27  *
28  *   21-Jul-2004  Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
29  *                Addition of ADC/TC demux
30  *
31  *   04-Oct-2004  Klaus Fetscher <k.fetscher@fetron.de>
32  *                Fix for set_irq_type() on low EINT numbers
33  *
34  *   05-Oct-2004  Ben Dooks <ben@simtec.co.uk>
35  *                Tidy up KF's patch and sort out new release
36  *
37  *   05-Oct-2004  Ben Dooks <ben@simtec.co.uk>
38  *                Add support for power management controls
39  *
40  *   04-Nov-2004  Ben Dooks
41  *                Fix standard IRQ wake for EINT0..4 and RTC
42  *
43  *   22-Feb-2005  Ben Dooks
44  *                Fixed edge-triggering on ADC IRQ
45  *
46  *   28-Jun-2005  Ben Dooks
47  *                Mark IRQ_LCD valid
48  *
49  *   25-Jul-2005  Ben Dooks
50  *                Split the S3C2440 IRQ code to seperate file
51 */
52
53 #include <linux/init.h>
54 #include <linux/module.h>
55 #include <linux/interrupt.h>
56 #include <linux/ioport.h>
57 #include <linux/ptrace.h>
58 #include <linux/sysdev.h>
59
60 #include <asm/hardware.h>
61 #include <asm/irq.h>
62 #include <asm/io.h>
63
64 #include <asm/mach/irq.h>
65
66 #include <asm/arch/regs-irq.h>
67 #include <asm/arch/regs-gpio.h>
68
69 #include "cpu.h"
70 #include "pm.h"
71 #include "irq.h"
72
73 /* wakeup irq control */
74
75 #ifdef CONFIG_PM
76
77 /* state for IRQs over sleep */
78
79 /* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
80  *
81  * set bit to 1 in allow bitfield to enable the wakeup settings on it
82 */
83
84 unsigned long s3c_irqwake_intallow      = 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
85 unsigned long s3c_irqwake_intmask       = 0xffffffffL;
86 unsigned long s3c_irqwake_eintallow     = 0x0000fff0L;
87 unsigned long s3c_irqwake_eintmask      = 0xffffffffL;
88
89 int
90 s3c_irq_wake(unsigned int irqno, unsigned int state)
91 {
92         unsigned long irqbit = 1 << (irqno - IRQ_EINT0);
93
94         if (!(s3c_irqwake_intallow & irqbit))
95                 return -ENOENT;
96
97         printk(KERN_INFO "wake %s for irq %d\n",
98                state ? "enabled" : "disabled", irqno);
99
100         if (!state)
101                 s3c_irqwake_intmask |= irqbit;
102         else
103                 s3c_irqwake_intmask &= ~irqbit;
104
105         return 0;
106 }
107
108 static int
109 s3c_irqext_wake(unsigned int irqno, unsigned int state)
110 {
111         unsigned long bit = 1L << (irqno - EXTINT_OFF);
112
113         if (!(s3c_irqwake_eintallow & bit))
114                 return -ENOENT;
115
116         printk(KERN_INFO "wake %s for irq %d\n",
117                state ? "enabled" : "disabled", irqno);
118
119         if (!state)
120                 s3c_irqwake_eintmask |= bit;
121         else
122                 s3c_irqwake_eintmask &= ~bit;
123
124         return 0;
125 }
126
127 #else
128 #define s3c_irqext_wake NULL
129 #define s3c_irq_wake NULL
130 #endif
131
132
133 static void
134 s3c_irq_mask(unsigned int irqno)
135 {
136         unsigned long mask;
137
138         irqno -= IRQ_EINT0;
139
140         mask = __raw_readl(S3C2410_INTMSK);
141         mask |= 1UL << irqno;
142         __raw_writel(mask, S3C2410_INTMSK);
143 }
144
145 static inline void
146 s3c_irq_ack(unsigned int irqno)
147 {
148         unsigned long bitval = 1UL << (irqno - IRQ_EINT0);
149
150         __raw_writel(bitval, S3C2410_SRCPND);
151         __raw_writel(bitval, S3C2410_INTPND);
152 }
153
154 static inline void
155 s3c_irq_maskack(unsigned int irqno)
156 {
157         unsigned long bitval = 1UL << (irqno - IRQ_EINT0);
158         unsigned long mask;
159
160         mask = __raw_readl(S3C2410_INTMSK);
161         __raw_writel(mask|bitval, S3C2410_INTMSK);
162
163         __raw_writel(bitval, S3C2410_SRCPND);
164         __raw_writel(bitval, S3C2410_INTPND);
165 }
166
167
168 static void
169 s3c_irq_unmask(unsigned int irqno)
170 {
171         unsigned long mask;
172
173         if (irqno != IRQ_TIMER4 && irqno != IRQ_EINT8t23)
174                 irqdbf2("s3c_irq_unmask %d\n", irqno);
175
176         irqno -= IRQ_EINT0;
177
178         mask = __raw_readl(S3C2410_INTMSK);
179         mask &= ~(1UL << irqno);
180         __raw_writel(mask, S3C2410_INTMSK);
181 }
182
183 struct irq_chip s3c_irq_level_chip = {
184         .name           = "s3c-level",
185         .ack            = s3c_irq_maskack,
186         .mask           = s3c_irq_mask,
187         .unmask         = s3c_irq_unmask,
188         .set_wake       = s3c_irq_wake
189 };
190
191 static struct irq_chip s3c_irq_chip = {
192         .name           = "s3c",
193         .ack            = s3c_irq_ack,
194         .mask           = s3c_irq_mask,
195         .unmask         = s3c_irq_unmask,
196         .set_wake       = s3c_irq_wake
197 };
198
199 static void
200 s3c_irqext_mask(unsigned int irqno)
201 {
202         unsigned long mask;
203
204         irqno -= EXTINT_OFF;
205
206         mask = __raw_readl(S3C24XX_EINTMASK);
207         mask |= ( 1UL << irqno);
208         __raw_writel(mask, S3C24XX_EINTMASK);
209 }
210
211 static void
212 s3c_irqext_ack(unsigned int irqno)
213 {
214         unsigned long req;
215         unsigned long bit;
216         unsigned long mask;
217
218         bit = 1UL << (irqno - EXTINT_OFF);
219
220         mask = __raw_readl(S3C24XX_EINTMASK);
221
222         __raw_writel(bit, S3C24XX_EINTPEND);
223
224         req = __raw_readl(S3C24XX_EINTPEND);
225         req &= ~mask;
226
227         /* not sure if we should be acking the parent irq... */
228
229         if (irqno <= IRQ_EINT7 ) {
230                 if ((req & 0xf0) == 0)
231                         s3c_irq_ack(IRQ_EINT4t7);
232         } else {
233                 if ((req >> 8) == 0)
234                         s3c_irq_ack(IRQ_EINT8t23);
235         }
236 }
237
238 static void
239 s3c_irqext_unmask(unsigned int irqno)
240 {
241         unsigned long mask;
242
243         irqno -= EXTINT_OFF;
244
245         mask = __raw_readl(S3C24XX_EINTMASK);
246         mask &= ~( 1UL << irqno);
247         __raw_writel(mask, S3C24XX_EINTMASK);
248 }
249
250 int
251 s3c_irqext_type(unsigned int irq, unsigned int type)
252 {
253         void __iomem *extint_reg;
254         void __iomem *gpcon_reg;
255         unsigned long gpcon_offset, extint_offset;
256         unsigned long newvalue = 0, value;
257
258         if ((irq >= IRQ_EINT0) && (irq <= IRQ_EINT3))
259         {
260                 gpcon_reg = S3C2410_GPFCON;
261                 extint_reg = S3C24XX_EXTINT0;
262                 gpcon_offset = (irq - IRQ_EINT0) * 2;
263                 extint_offset = (irq - IRQ_EINT0) * 4;
264         }
265         else if ((irq >= IRQ_EINT4) && (irq <= IRQ_EINT7))
266         {
267                 gpcon_reg = S3C2410_GPFCON;
268                 extint_reg = S3C24XX_EXTINT0;
269                 gpcon_offset = (irq - (EXTINT_OFF)) * 2;
270                 extint_offset = (irq - (EXTINT_OFF)) * 4;
271         }
272         else if ((irq >= IRQ_EINT8) && (irq <= IRQ_EINT15))
273         {
274                 gpcon_reg = S3C2410_GPGCON;
275                 extint_reg = S3C24XX_EXTINT1;
276                 gpcon_offset = (irq - IRQ_EINT8) * 2;
277                 extint_offset = (irq - IRQ_EINT8) * 4;
278         }
279         else if ((irq >= IRQ_EINT16) && (irq <= IRQ_EINT23))
280         {
281                 gpcon_reg = S3C2410_GPGCON;
282                 extint_reg = S3C24XX_EXTINT2;
283                 gpcon_offset = (irq - IRQ_EINT8) * 2;
284                 extint_offset = (irq - IRQ_EINT16) * 4;
285         } else
286                 return -1;
287
288         /* Set the GPIO to external interrupt mode */
289         value = __raw_readl(gpcon_reg);
290         value = (value & ~(3 << gpcon_offset)) | (0x02 << gpcon_offset);
291         __raw_writel(value, gpcon_reg);
292
293         /* Set the external interrupt to pointed trigger type */
294         switch (type)
295         {
296                 case IRQT_NOEDGE:
297                         printk(KERN_WARNING "No edge setting!\n");
298                         break;
299
300                 case IRQT_RISING:
301                         newvalue = S3C2410_EXTINT_RISEEDGE;
302                         break;
303
304                 case IRQT_FALLING:
305                         newvalue = S3C2410_EXTINT_FALLEDGE;
306                         break;
307
308                 case IRQT_BOTHEDGE:
309                         newvalue = S3C2410_EXTINT_BOTHEDGE;
310                         break;
311
312                 case IRQT_LOW:
313                         newvalue = S3C2410_EXTINT_LOWLEV;
314                         break;
315
316                 case IRQT_HIGH:
317                         newvalue = S3C2410_EXTINT_HILEV;
318                         break;
319
320                 default:
321                         printk(KERN_ERR "No such irq type %d", type);
322                         return -1;
323         }
324
325         value = __raw_readl(extint_reg);
326         value = (value & ~(7 << extint_offset)) | (newvalue << extint_offset);
327         __raw_writel(value, extint_reg);
328
329         return 0;
330 }
331
332 static struct irq_chip s3c_irqext_chip = {
333         .name           = "s3c-ext",
334         .mask           = s3c_irqext_mask,
335         .unmask         = s3c_irqext_unmask,
336         .ack            = s3c_irqext_ack,
337         .set_type       = s3c_irqext_type,
338         .set_wake       = s3c_irqext_wake
339 };
340
341 static struct irq_chip s3c_irq_eint0t4 = {
342         .name           = "s3c-ext0",
343         .ack            = s3c_irq_ack,
344         .mask           = s3c_irq_mask,
345         .unmask         = s3c_irq_unmask,
346         .set_wake       = s3c_irq_wake,
347         .set_type       = s3c_irqext_type,
348 };
349
350 /* mask values for the parent registers for each of the interrupt types */
351
352 #define INTMSK_UART0     (1UL << (IRQ_UART0 - IRQ_EINT0))
353 #define INTMSK_UART1     (1UL << (IRQ_UART1 - IRQ_EINT0))
354 #define INTMSK_UART2     (1UL << (IRQ_UART2 - IRQ_EINT0))
355 #define INTMSK_ADCPARENT (1UL << (IRQ_ADCPARENT - IRQ_EINT0))
356
357
358 /* UART0 */
359
360 static void
361 s3c_irq_uart0_mask(unsigned int irqno)
362 {
363         s3c_irqsub_mask(irqno, INTMSK_UART0, 7);
364 }
365
366 static void
367 s3c_irq_uart0_unmask(unsigned int irqno)
368 {
369         s3c_irqsub_unmask(irqno, INTMSK_UART0);
370 }
371
372 static void
373 s3c_irq_uart0_ack(unsigned int irqno)
374 {
375         s3c_irqsub_maskack(irqno, INTMSK_UART0, 7);
376 }
377
378 static struct irq_chip s3c_irq_uart0 = {
379         .name           = "s3c-uart0",
380         .mask           = s3c_irq_uart0_mask,
381         .unmask         = s3c_irq_uart0_unmask,
382         .ack            = s3c_irq_uart0_ack,
383 };
384
385 /* UART1 */
386
387 static void
388 s3c_irq_uart1_mask(unsigned int irqno)
389 {
390         s3c_irqsub_mask(irqno, INTMSK_UART1, 7 << 3);
391 }
392
393 static void
394 s3c_irq_uart1_unmask(unsigned int irqno)
395 {
396         s3c_irqsub_unmask(irqno, INTMSK_UART1);
397 }
398
399 static void
400 s3c_irq_uart1_ack(unsigned int irqno)
401 {
402         s3c_irqsub_maskack(irqno, INTMSK_UART1, 7 << 3);
403 }
404
405 static struct irq_chip s3c_irq_uart1 = {
406         .name           = "s3c-uart1",
407         .mask           = s3c_irq_uart1_mask,
408         .unmask         = s3c_irq_uart1_unmask,
409         .ack            = s3c_irq_uart1_ack,
410 };
411
412 /* UART2 */
413
414 static void
415 s3c_irq_uart2_mask(unsigned int irqno)
416 {
417         s3c_irqsub_mask(irqno, INTMSK_UART2, 7 << 6);
418 }
419
420 static void
421 s3c_irq_uart2_unmask(unsigned int irqno)
422 {
423         s3c_irqsub_unmask(irqno, INTMSK_UART2);
424 }
425
426 static void
427 s3c_irq_uart2_ack(unsigned int irqno)
428 {
429         s3c_irqsub_maskack(irqno, INTMSK_UART2, 7 << 6);
430 }
431
432 static struct irq_chip s3c_irq_uart2 = {
433         .name           = "s3c-uart2",
434         .mask           = s3c_irq_uart2_mask,
435         .unmask         = s3c_irq_uart2_unmask,
436         .ack            = s3c_irq_uart2_ack,
437 };
438
439 /* ADC and Touchscreen */
440
441 static void
442 s3c_irq_adc_mask(unsigned int irqno)
443 {
444         s3c_irqsub_mask(irqno, INTMSK_ADCPARENT, 3 << 9);
445 }
446
447 static void
448 s3c_irq_adc_unmask(unsigned int irqno)
449 {
450         s3c_irqsub_unmask(irqno, INTMSK_ADCPARENT);
451 }
452
453 static void
454 s3c_irq_adc_ack(unsigned int irqno)
455 {
456         s3c_irqsub_ack(irqno, INTMSK_ADCPARENT, 3 << 9);
457 }
458
459 static struct irq_chip s3c_irq_adc = {
460         .name           = "s3c-adc",
461         .mask           = s3c_irq_adc_mask,
462         .unmask         = s3c_irq_adc_unmask,
463         .ack            = s3c_irq_adc_ack,
464 };
465
466 /* irq demux for adc */
467 static void s3c_irq_demux_adc(unsigned int irq,
468                               struct irq_desc *desc)
469 {
470         unsigned int subsrc, submsk;
471         unsigned int offset = 9;
472         struct irq_desc *mydesc;
473
474         /* read the current pending interrupts, and the mask
475          * for what it is available */
476
477         subsrc = __raw_readl(S3C2410_SUBSRCPND);
478         submsk = __raw_readl(S3C2410_INTSUBMSK);
479
480         subsrc &= ~submsk;
481         subsrc >>= offset;
482         subsrc &= 3;
483
484         if (subsrc != 0) {
485                 if (subsrc & 1) {
486                         mydesc = irq_desc + IRQ_TC;
487                         desc_handle_irq(IRQ_TC, mydesc);
488                 }
489                 if (subsrc & 2) {
490                         mydesc = irq_desc + IRQ_ADC;
491                         desc_handle_irq(IRQ_ADC, mydesc);
492                 }
493         }
494 }
495
496 static void s3c_irq_demux_uart(unsigned int start)
497 {
498         unsigned int subsrc, submsk;
499         unsigned int offset = start - IRQ_S3CUART_RX0;
500         struct irq_desc *desc;
501
502         /* read the current pending interrupts, and the mask
503          * for what it is available */
504
505         subsrc = __raw_readl(S3C2410_SUBSRCPND);
506         submsk = __raw_readl(S3C2410_INTSUBMSK);
507
508         irqdbf2("s3c_irq_demux_uart: start=%d (%d), subsrc=0x%08x,0x%08x\n",
509                 start, offset, subsrc, submsk);
510
511         subsrc &= ~submsk;
512         subsrc >>= offset;
513         subsrc &= 7;
514
515         if (subsrc != 0) {
516                 desc = irq_desc + start;
517
518                 if (subsrc & 1)
519                         desc_handle_irq(start, desc);
520
521                 desc++;
522
523                 if (subsrc & 2)
524                         desc_handle_irq(start+1, desc);
525
526                 desc++;
527
528                 if (subsrc & 4)
529                         desc_handle_irq(start+2, desc);
530         }
531 }
532
533 /* uart demux entry points */
534
535 static void
536 s3c_irq_demux_uart0(unsigned int irq,
537                     struct irq_desc *desc)
538 {
539         irq = irq;
540         s3c_irq_demux_uart(IRQ_S3CUART_RX0);
541 }
542
543 static void
544 s3c_irq_demux_uart1(unsigned int irq,
545                     struct irq_desc *desc)
546 {
547         irq = irq;
548         s3c_irq_demux_uart(IRQ_S3CUART_RX1);
549 }
550
551 static void
552 s3c_irq_demux_uart2(unsigned int irq,
553                     struct irq_desc *desc)
554 {
555         irq = irq;
556         s3c_irq_demux_uart(IRQ_S3CUART_RX2);
557 }
558
559 static void
560 s3c_irq_demux_extint8(unsigned int irq,
561                       struct irq_desc *desc)
562 {
563         unsigned long eintpnd = __raw_readl(S3C24XX_EINTPEND);
564         unsigned long eintmsk = __raw_readl(S3C24XX_EINTMASK);
565
566         eintpnd &= ~eintmsk;
567         eintpnd &= ~0xff;       /* ignore lower irqs */
568
569         /* we may as well handle all the pending IRQs here */
570
571         while (eintpnd) {
572                 irq = __ffs(eintpnd);
573                 eintpnd &= ~(1<<irq);
574
575                 irq += (IRQ_EINT4 - 4);
576                 desc_handle_irq(irq, irq_desc + irq);
577         }
578
579 }
580
581 static void
582 s3c_irq_demux_extint4t7(unsigned int irq,
583                         struct irq_desc *desc)
584 {
585         unsigned long eintpnd = __raw_readl(S3C24XX_EINTPEND);
586         unsigned long eintmsk = __raw_readl(S3C24XX_EINTMASK);
587
588         eintpnd &= ~eintmsk;
589         eintpnd &= 0xff;        /* only lower irqs */
590
591         /* we may as well handle all the pending IRQs here */
592
593         while (eintpnd) {
594                 irq = __ffs(eintpnd);
595                 eintpnd &= ~(1<<irq);
596
597                 irq += (IRQ_EINT4 - 4);
598
599                 desc_handle_irq(irq, irq_desc + irq);
600         }
601 }
602
603 #ifdef CONFIG_PM
604
605 static struct sleep_save irq_save[] = {
606         SAVE_ITEM(S3C2410_INTMSK),
607         SAVE_ITEM(S3C2410_INTSUBMSK),
608 };
609
610 /* the extint values move between the s3c2410/s3c2440 and the s3c2412
611  * so we use an array to hold them, and to calculate the address of
612  * the register at run-time
613 */
614
615 static unsigned long save_extint[3];
616 static unsigned long save_eintflt[4];
617 static unsigned long save_eintmask;
618
619 int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
620 {
621         unsigned int i;
622
623         for (i = 0; i < ARRAY_SIZE(save_extint); i++)
624                 save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
625
626         for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
627                 save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
628
629         s3c2410_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
630         save_eintmask = __raw_readl(S3C24XX_EINTMASK);
631
632         return 0;
633 }
634
635 int s3c24xx_irq_resume(struct sys_device *dev)
636 {
637         unsigned int i;
638
639         for (i = 0; i < ARRAY_SIZE(save_extint); i++)
640                 __raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
641
642         for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
643                 __raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
644
645         s3c2410_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
646         __raw_writel(save_eintmask, S3C24XX_EINTMASK);
647
648         return 0;
649 }
650
651 #else
652 #define s3c24xx_irq_suspend NULL
653 #define s3c24xx_irq_resume  NULL
654 #endif
655
656 /* s3c24xx_init_irq
657  *
658  * Initialise S3C2410 IRQ system
659 */
660
661 void __init s3c24xx_init_irq(void)
662 {
663         unsigned long pend;
664         unsigned long last;
665         int irqno;
666         int i;
667
668         irqdbf("s3c2410_init_irq: clearing interrupt status flags\n");
669
670         /* first, clear all interrupts pending... */
671
672         last = 0;
673         for (i = 0; i < 4; i++) {
674                 pend = __raw_readl(S3C24XX_EINTPEND);
675
676                 if (pend == 0 || pend == last)
677                         break;
678
679                 __raw_writel(pend, S3C24XX_EINTPEND);
680                 printk("irq: clearing pending ext status %08x\n", (int)pend);
681                 last = pend;
682         }
683
684         last = 0;
685         for (i = 0; i < 4; i++) {
686                 pend = __raw_readl(S3C2410_INTPND);
687
688                 if (pend == 0 || pend == last)
689                         break;
690
691                 __raw_writel(pend, S3C2410_SRCPND);
692                 __raw_writel(pend, S3C2410_INTPND);
693                 printk("irq: clearing pending status %08x\n", (int)pend);
694                 last = pend;
695         }
696
697         last = 0;
698         for (i = 0; i < 4; i++) {
699                 pend = __raw_readl(S3C2410_SUBSRCPND);
700
701                 if (pend == 0 || pend == last)
702                         break;
703
704                 printk("irq: clearing subpending status %08x\n", (int)pend);
705                 __raw_writel(pend, S3C2410_SUBSRCPND);
706                 last = pend;
707         }
708
709         /* register the main interrupts */
710
711         irqdbf("s3c2410_init_irq: registering s3c2410 interrupt handlers\n");
712
713         for (irqno = IRQ_EINT4t7; irqno <= IRQ_ADCPARENT; irqno++) {
714                 /* set all the s3c2410 internal irqs */
715
716                 switch (irqno) {
717                         /* deal with the special IRQs (cascaded) */
718
719                 case IRQ_EINT4t7:
720                 case IRQ_EINT8t23:
721                 case IRQ_UART0:
722                 case IRQ_UART1:
723                 case IRQ_UART2:
724                 case IRQ_ADCPARENT:
725                         set_irq_chip(irqno, &s3c_irq_level_chip);
726                         set_irq_handler(irqno, handle_level_irq);
727                         break;
728
729                 case IRQ_RESERVED6:
730                 case IRQ_RESERVED24:
731                         /* no IRQ here */
732                         break;
733
734                 default:
735                         //irqdbf("registering irq %d (s3c irq)\n", irqno);
736                         set_irq_chip(irqno, &s3c_irq_chip);
737                         set_irq_handler(irqno, handle_edge_irq);
738                         set_irq_flags(irqno, IRQF_VALID);
739                 }
740         }
741
742         /* setup the cascade irq handlers */
743
744         set_irq_chained_handler(IRQ_EINT4t7, s3c_irq_demux_extint4t7);
745         set_irq_chained_handler(IRQ_EINT8t23, s3c_irq_demux_extint8);
746
747         set_irq_chained_handler(IRQ_UART0, s3c_irq_demux_uart0);
748         set_irq_chained_handler(IRQ_UART1, s3c_irq_demux_uart1);
749         set_irq_chained_handler(IRQ_UART2, s3c_irq_demux_uart2);
750         set_irq_chained_handler(IRQ_ADCPARENT, s3c_irq_demux_adc);
751
752         /* external interrupts */
753
754         for (irqno = IRQ_EINT0; irqno <= IRQ_EINT3; irqno++) {
755                 irqdbf("registering irq %d (ext int)\n", irqno);
756                 set_irq_chip(irqno, &s3c_irq_eint0t4);
757                 set_irq_handler(irqno, handle_edge_irq);
758                 set_irq_flags(irqno, IRQF_VALID);
759         }
760
761         for (irqno = IRQ_EINT4; irqno <= IRQ_EINT23; irqno++) {
762                 irqdbf("registering irq %d (extended s3c irq)\n", irqno);
763                 set_irq_chip(irqno, &s3c_irqext_chip);
764                 set_irq_handler(irqno, handle_edge_irq);
765                 set_irq_flags(irqno, IRQF_VALID);
766         }
767
768         /* register the uart interrupts */
769
770         irqdbf("s3c2410: registering external interrupts\n");
771
772         for (irqno = IRQ_S3CUART_RX0; irqno <= IRQ_S3CUART_ERR0; irqno++) {
773                 irqdbf("registering irq %d (s3c uart0 irq)\n", irqno);
774                 set_irq_chip(irqno, &s3c_irq_uart0);
775                 set_irq_handler(irqno, handle_level_irq);
776                 set_irq_flags(irqno, IRQF_VALID);
777         }
778
779         for (irqno = IRQ_S3CUART_RX1; irqno <= IRQ_S3CUART_ERR1; irqno++) {
780                 irqdbf("registering irq %d (s3c uart1 irq)\n", irqno);
781                 set_irq_chip(irqno, &s3c_irq_uart1);
782                 set_irq_handler(irqno, handle_level_irq);
783                 set_irq_flags(irqno, IRQF_VALID);
784         }
785
786         for (irqno = IRQ_S3CUART_RX2; irqno <= IRQ_S3CUART_ERR2; irqno++) {
787                 irqdbf("registering irq %d (s3c uart2 irq)\n", irqno);
788                 set_irq_chip(irqno, &s3c_irq_uart2);
789                 set_irq_handler(irqno, handle_level_irq);
790                 set_irq_flags(irqno, IRQF_VALID);
791         }
792
793         for (irqno = IRQ_TC; irqno <= IRQ_ADC; irqno++) {
794                 irqdbf("registering irq %d (s3c adc irq)\n", irqno);
795                 set_irq_chip(irqno, &s3c_irq_adc);
796                 set_irq_handler(irqno, handle_edge_irq);
797                 set_irq_flags(irqno, IRQF_VALID);
798         }
799
800         irqdbf("s3c2410: registered interrupt handlers\n");
801 }