2 files changed, 63 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2412/irq.c b/arch/arm/mach-s3c2412/irq.c
index f0d66828f965..e9d0c769f5da 100644
--- a/arch/arm/mach-s3c2412/irq.c
+++ b/arch/arm/mach-s3c2412/irq.c
@@ -38,6 +38,9 @@
 #include <asm/plat-s3c24xx/irq.h>
 #include <asm/plat-s3c24xx/pm.h>
 
+#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)
+#define INTMSK_SUB(start, end) (INTMSK(start, end) << ((start - S3C2410_IRQSUB(0))))
+
 /* the s3c2412 changes the behaviour of IRQ_EINT0 through IRQ_EINT3 by
  * having them turn up in both the INT* and the EINT* registers. Whilst
  * both show the status, they both now need to be acked when the IRQs
@@ -105,6 +108,51 @@ static struct irq_chip s3c2412_irq_eint0t4 = {
         .set_type  = s3c_irqext_type,
 };
 
+#define INTBIT(x)       (1 << ((x) - S3C2410_IRQSUB(0)))
+
+/* CF and SDI sub interrupts */
+
+static void s3c2412_irq_demux_cfsdi(unsigned int irq, struct irq_desc *desc)
+{
+        unsigned int subsrc, submsk;
+
+        subsrc = __raw_readl(S3C2410_SUBSRCPND);
+        submsk = __raw_readl(S3C2410_INTSUBMSK);
+
+        subsrc  &= ~submsk;
+
+        if (subsrc & INTBIT(IRQ_S3C2412_SDI))
+                desc_handle_irq(IRQ_S3C2412_SDI, irq_desc + IRQ_S3C2412_SDI);
+
+        if (subsrc & INTBIT(IRQ_S3C2412_CF))
+                desc_handle_irq(IRQ_S3C2412_CF, irq_desc + IRQ_S3C2412_CF);
+}
+
+#define INTMSK_CFSDI    (1UL << (IRQ_S3C2412_CFSDI - IRQ_EINT0))
+#define SUBMSK_CFSDI    INTMSK_SUB(IRQ_S3C2412_SDI, IRQ_S3C2412_CF)
+
+static void s3c2412_irq_cfsdi_mask(unsigned int irqno)
+{
+        s3c_irqsub_mask(irqno, INTMSK_CFSDI, SUBMSK_CFSDI);
+}
+
+static void s3c2412_irq_cfsdi_unmask(unsigned int irqno)
+{
+        s3c_irqsub_unmask(irqno, INTMSK_CFSDI);
+}
+
+static void s3c2412_irq_cfsdi_ack(unsigned int irqno)
+{
+        s3c_irqsub_maskack(irqno, INTMSK_CFSDI, SUBMSK_CFSDI);
+}
+
+static struct irq_chip s3c2412_irq_cfsdi = {
+        .name           = "s3c2412-cfsdi",
+        .ack            = s3c2412_irq_cfsdi_ack,
+        .mask           = s3c2412_irq_cfsdi_mask,
+        .unmask         = s3c2412_irq_cfsdi_unmask,
+};
+
 static int s3c2412_irq_add(struct sys_device *sysdev)
 {
         unsigned int irqno;
@@ -115,6 +163,16 @@ static int s3c2412_irq_add(struct sys_device *sysdev)
                 set_irq_flags(irqno, IRQF_VALID);
         }
 
+        /* add demux support for CF/SDI */
+
+        set_irq_chained_handler(IRQ_S3C2412_CFSDI, s3c2412_irq_demux_cfsdi);
+
+        for (irqno = IRQ_S3C2412_SDI; irqno <= IRQ_S3C2412_CF; irqno++) {
+                set_irq_chip(irqno, &s3c2412_irq_cfsdi);
+                set_irq_handler(irqno, handle_level_irq);
+                set_irq_flags(irqno, IRQF_VALID);
+        }
+
         return 0;
 }
 
diff --git a/arch/arm/mach-s3c2412/s3c2412.c b/arch/arm/mach-s3c2412/s3c2412.c
index e0ccb404623f..4f92a1562d77 100644
--- a/arch/arm/mach-s3c2412/s3c2412.c
+++ b/arch/arm/mach-s3c2412/s3c2412.c
@@ -78,6 +78,11 @@ void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
         s3c_device_lcd.name  = "s3c2412-lcd";
         s3c_device_nand.name = "s3c2412-nand";
 
+        /* alter IRQ of SDI controller */
+
+        s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
+        s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
+
         /* spi channel related changes, s3c2412/13 specific */
         s3c_device_spi0.name = "s3c2412-spi";
         s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;