1 files changed, 130 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2440/irq.c b/arch/arm/mach-s3c2440/irq.c
new file mode 100644
index 000000000000..1069d13d8c57
--- /dev/null
+++ b/arch/arm/mach-s3c2440/irq.c
@@ -0,0 +1,130 @@
+/* linux/arch/arm/mach-s3c2440/irq.c
+ *
+ * Copyright (c) 2003,2004 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/ptrace.h>
+#include <linux/sysdev.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <asm/mach/irq.h>
+
+#include <asm/arch/regs-irq.h>
+#include <asm/arch/regs-gpio.h>
+
+#include <asm/plat-s3c24xx/cpu.h>
+#include <asm/plat-s3c24xx/pm.h>
+#include <asm/plat-s3c24xx/irq.h>
+
+/* WDT/AC97 */
+
+static void s3c_irq_demux_wdtac97(unsigned int irq,
+                                  struct irq_desc *desc)
+{
+        unsigned int subsrc, submsk;
+        struct irq_desc *mydesc;
+
+        /* 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 >>= 13;
+        subsrc &= 3;
+
+        if (subsrc != 0) {
+                if (subsrc & 1) {
+                        mydesc = irq_desc + IRQ_S3C2440_WDT;
+                        desc_handle_irq(IRQ_S3C2440_WDT, mydesc);
+                }
+                if (subsrc & 2) {
+                        mydesc = irq_desc + IRQ_S3C2440_AC97;
+                        desc_handle_irq(IRQ_S3C2440_AC97, mydesc);
+                }
+        }
+}
+
+
+#define INTMSK_WDT       (1UL << (IRQ_WDT - IRQ_EINT0))
+
+static void
+s3c_irq_wdtac97_mask(unsigned int irqno)
+{
+        s3c_irqsub_mask(irqno, INTMSK_WDT, 3<<13);
+}
+
+static void
+s3c_irq_wdtac97_unmask(unsigned int irqno)
+{
+        s3c_irqsub_unmask(irqno, INTMSK_WDT);
+}
+
+static void
+s3c_irq_wdtac97_ack(unsigned int irqno)
+{
+        s3c_irqsub_maskack(irqno, INTMSK_WDT, 3<<13);
+}
+
+static struct irq_chip s3c_irq_wdtac97 = {
+        .mask       = s3c_irq_wdtac97_mask,
+        .unmask     = s3c_irq_wdtac97_unmask,
+        .ack        = s3c_irq_wdtac97_ack,
+};
+
+static int s3c2440_irq_add(struct sys_device *sysdev)
+{
+        unsigned int irqno;
+
+        printk("S3C2440: IRQ Support\n");
+
+        /* add new chained handler for wdt, ac7 */
+
+        set_irq_chip(IRQ_WDT, &s3c_irq_level_chip);
+        set_irq_handler(IRQ_WDT, handle_level_irq);
+        set_irq_chained_handler(IRQ_WDT, s3c_irq_demux_wdtac97);
+
+        for (irqno = IRQ_S3C2440_WDT; irqno <= IRQ_S3C2440_AC97; irqno++) {
+                set_irq_chip(irqno, &s3c_irq_wdtac97);
+                set_irq_handler(irqno, handle_level_irq);
+                set_irq_flags(irqno, IRQF_VALID);
+        }
+
+        return 0;
+}
+
+static struct sysdev_driver s3c2440_irq_driver = {
+        .add            = s3c2440_irq_add,
+};
+
+static int s3c2440_irq_init(void)
+{
+        return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
+}
+
+arch_initcall(s3c2440_irq_init);
+