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-rw-r--r--arch/arm/mach-s3c2410/irq.c260
1 files changed, 5 insertions, 255 deletions
diff --git a/arch/arm/mach-s3c2410/irq.c b/arch/arm/mach-s3c2410/irq.c
index cf9f46d88061..973a5fe6769c 100644
--- a/arch/arm/mach-s3c2410/irq.c
+++ b/arch/arm/mach-s3c2410/irq.c
@@ -45,6 +45,9 @@
45 * 45 *
46 * 28-Jun-2005 Ben Dooks 46 * 28-Jun-2005 Ben Dooks
47 * Mark IRQ_LCD valid 47 * Mark IRQ_LCD valid
48 *
49 * 25-Jul-2005 Ben Dooks
50 * Split the S3C2440 IRQ code to seperate file
48*/ 51*/
49 52
50#include <linux/init.h> 53#include <linux/init.h>
@@ -65,11 +68,7 @@
65 68
66#include "cpu.h" 69#include "cpu.h"
67#include "pm.h" 70#include "pm.h"
68 71#include "irq.h"
69#define irqdbf(x...)
70#define irqdbf2(x...)
71
72#define EXTINT_OFF (IRQ_EINT4 - 4)
73 72
74/* wakeup irq control */ 73/* wakeup irq control */
75 74
@@ -181,7 +180,7 @@ s3c_irq_unmask(unsigned int irqno)
181 __raw_writel(mask, S3C2410_INTMSK); 180 __raw_writel(mask, S3C2410_INTMSK);
182} 181}
183 182
184static struct irqchip s3c_irq_level_chip = { 183struct irqchip s3c_irq_level_chip = {
185 .ack = s3c_irq_maskack, 184 .ack = s3c_irq_maskack,
186 .mask = s3c_irq_mask, 185 .mask = s3c_irq_mask,
187 .unmask = s3c_irq_unmask, 186 .unmask = s3c_irq_unmask,
@@ -370,84 +369,6 @@ static struct irqchip s3c_irq_eint0t4 = {
370#define INTMSK_UART2 (1UL << (IRQ_UART2 - IRQ_EINT0)) 369#define INTMSK_UART2 (1UL << (IRQ_UART2 - IRQ_EINT0))
371#define INTMSK_ADCPARENT (1UL << (IRQ_ADCPARENT - IRQ_EINT0)) 370#define INTMSK_ADCPARENT (1UL << (IRQ_ADCPARENT - IRQ_EINT0))
372 371
373static inline void
374s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
375 int subcheck)
376{
377 unsigned long mask;
378 unsigned long submask;
379
380 submask = __raw_readl(S3C2410_INTSUBMSK);
381 mask = __raw_readl(S3C2410_INTMSK);
382
383 submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
384
385 /* check to see if we need to mask the parent IRQ */
386
387 if ((submask & subcheck) == subcheck) {
388 __raw_writel(mask | parentbit, S3C2410_INTMSK);
389 }
390
391 /* write back masks */
392 __raw_writel(submask, S3C2410_INTSUBMSK);
393
394}
395
396static inline void
397s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
398{
399 unsigned long mask;
400 unsigned long submask;
401
402 submask = __raw_readl(S3C2410_INTSUBMSK);
403 mask = __raw_readl(S3C2410_INTMSK);
404
405 submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
406 mask &= ~parentbit;
407
408 /* write back masks */
409 __raw_writel(submask, S3C2410_INTSUBMSK);
410 __raw_writel(mask, S3C2410_INTMSK);
411}
412
413
414static inline void
415s3c_irqsub_maskack(unsigned int irqno, unsigned int parentmask, unsigned int group)
416{
417 unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
418
419 s3c_irqsub_mask(irqno, parentmask, group);
420
421 __raw_writel(bit, S3C2410_SUBSRCPND);
422
423 /* only ack parent if we've got all the irqs (seems we must
424 * ack, all and hope that the irq system retriggers ok when
425 * the interrupt goes off again)
426 */
427
428 if (1) {
429 __raw_writel(parentmask, S3C2410_SRCPND);
430 __raw_writel(parentmask, S3C2410_INTPND);
431 }
432}
433
434static inline void
435s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
436{
437 unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
438
439 __raw_writel(bit, S3C2410_SUBSRCPND);
440
441 /* only ack parent if we've got all the irqs (seems we must
442 * ack, all and hope that the irq system retriggers ok when
443 * the interrupt goes off again)
444 */
445
446 if (1) {
447 __raw_writel(parentmask, S3C2410_SRCPND);
448 __raw_writel(parentmask, S3C2410_INTPND);
449 }
450}
451 372
452/* UART0 */ 373/* UART0 */
453 374
@@ -794,174 +715,3 @@ void __init s3c24xx_init_irq(void)
794 715
795 irqdbf("s3c2410: registered interrupt handlers\n"); 716 irqdbf("s3c2410: registered interrupt handlers\n");
796} 717}
797
798/* s3c2440 irq code
799*/
800
801#ifdef CONFIG_CPU_S3C2440
802
803/* WDT/AC97 */
804
805static void s3c_irq_demux_wdtac97(unsigned int irq,
806 struct irqdesc *desc,
807 struct pt_regs *regs)
808{
809 unsigned int subsrc, submsk;
810 struct irqdesc *mydesc;
811
812 /* read the current pending interrupts, and the mask
813 * for what it is available */
814
815 subsrc = __raw_readl(S3C2410_SUBSRCPND);
816 submsk = __raw_readl(S3C2410_INTSUBMSK);
817
818 subsrc &= ~submsk;
819 subsrc >>= 13;
820 subsrc &= 3;
821
822 if (subsrc != 0) {
823 if (subsrc & 1) {
824 mydesc = irq_desc + IRQ_S3C2440_WDT;
825 mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
826 }
827 if (subsrc & 2) {
828 mydesc = irq_desc + IRQ_S3C2440_AC97;
829 mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
830 }
831 }
832}
833
834
835#define INTMSK_WDT (1UL << (IRQ_WDT - IRQ_EINT0))
836
837static void
838s3c_irq_wdtac97_mask(unsigned int irqno)
839{
840 s3c_irqsub_mask(irqno, INTMSK_WDT, 3<<13);
841}
842
843static void
844s3c_irq_wdtac97_unmask(unsigned int irqno)
845{
846 s3c_irqsub_unmask(irqno, INTMSK_WDT);
847}
848
849static void
850s3c_irq_wdtac97_ack(unsigned int irqno)
851{
852 s3c_irqsub_maskack(irqno, INTMSK_WDT, 3<<13);
853}
854
855static struct irqchip s3c_irq_wdtac97 = {
856 .mask = s3c_irq_wdtac97_mask,
857 .unmask = s3c_irq_wdtac97_unmask,
858 .ack = s3c_irq_wdtac97_ack,
859};
860
861/* camera irq */
862
863static void s3c_irq_demux_cam(unsigned int irq,
864 struct irqdesc *desc,
865 struct pt_regs *regs)
866{
867 unsigned int subsrc, submsk;
868 struct irqdesc *mydesc;
869
870 /* read the current pending interrupts, and the mask
871 * for what it is available */
872
873 subsrc = __raw_readl(S3C2410_SUBSRCPND);
874 submsk = __raw_readl(S3C2410_INTSUBMSK);
875
876 subsrc &= ~submsk;
877 subsrc >>= 11;
878 subsrc &= 3;
879
880 if (subsrc != 0) {
881 if (subsrc & 1) {
882 mydesc = irq_desc + IRQ_S3C2440_CAM_C;
883 mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
884 }
885 if (subsrc & 2) {
886 mydesc = irq_desc + IRQ_S3C2440_CAM_P;
887 mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
888 }
889 }
890}
891
892#define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
893
894static void
895s3c_irq_cam_mask(unsigned int irqno)
896{
897 s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
898}
899
900static void
901s3c_irq_cam_unmask(unsigned int irqno)
902{
903 s3c_irqsub_unmask(irqno, INTMSK_CAM);
904}
905
906static void
907s3c_irq_cam_ack(unsigned int irqno)
908{
909 s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
910}
911
912static struct irqchip s3c_irq_cam = {
913 .mask = s3c_irq_cam_mask,
914 .unmask = s3c_irq_cam_unmask,
915 .ack = s3c_irq_cam_ack,
916};
917
918static int s3c2440_irq_add(struct sys_device *sysdev)
919{
920 unsigned int irqno;
921
922 printk("S3C2440: IRQ Support\n");
923
924 set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
925 set_irq_handler(IRQ_NFCON, do_level_IRQ);
926 set_irq_flags(IRQ_NFCON, IRQF_VALID);
927
928 /* add new chained handler for wdt, ac7 */
929
930 set_irq_chip(IRQ_WDT, &s3c_irq_level_chip);
931 set_irq_handler(IRQ_WDT, do_level_IRQ);
932 set_irq_chained_handler(IRQ_WDT, s3c_irq_demux_wdtac97);
933
934 for (irqno = IRQ_S3C2440_WDT; irqno <= IRQ_S3C2440_AC97; irqno++) {
935 set_irq_chip(irqno, &s3c_irq_wdtac97);
936 set_irq_handler(irqno, do_level_IRQ);
937 set_irq_flags(irqno, IRQF_VALID);
938 }
939
940 /* add chained handler for camera */
941
942 set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
943 set_irq_handler(IRQ_CAM, do_level_IRQ);
944 set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
945
946 for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
947 set_irq_chip(irqno, &s3c_irq_cam);
948 set_irq_handler(irqno, do_level_IRQ);
949 set_irq_flags(irqno, IRQF_VALID);
950 }
951
952 return 0;
953}
954
955static struct sysdev_driver s3c2440_irq_driver = {
956 .add = s3c2440_irq_add,
957};
958
959static int s3c24xx_irq_driver(void)
960{
961 return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
962}
963
964arch_initcall(s3c24xx_irq_driver);
965
966#endif /* CONFIG_CPU_S3C2440 */
967
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