Merge branch 'next/cleanup3' of git://git.linaro.org/people/arnd/arm-soc

[pandora-kernel.git] / arch / arm / plat-samsung / include / plat / irq.h

diff --git a/arch/arm/plat-samsung/include/plat/irq.h b/arch/arm/plat-samsung/include/plat/irq.h
new file mode 100644 (file)
index 0000000..e21a89b
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/irq.h
@@ -0,0 +1,116 @@
+/* linux/arch/arm/plat-samsung/include/plat/irq.h
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *     Ben Dooks <ben@simtec.co.uk>
+ *
+ * Header file for S3C24XX CPU IRQ support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+
+#define irqdbf(x...)
+#define irqdbf2(x...)
+
+#define EXTINT_OFF (IRQ_EINT4 - 4)
+
+/* these are exported for arch/arm/mach-* usage */
+extern struct irq_chip s3c_irq_level_chip;
+extern struct irq_chip s3c_irq_chip;
+
+static inline void s3c_irqsub_mask(unsigned int irqno,
+                                  unsigned int parentbit,
+                                  int subcheck)
+{
+       unsigned long mask;
+       unsigned long submask;
+
+       submask = __raw_readl(S3C2410_INTSUBMSK);
+       mask = __raw_readl(S3C2410_INTMSK);
+
+       submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
+
+       /* check to see if we need to mask the parent IRQ */
+
+       if ((submask  & subcheck) == subcheck)
+               __raw_writel(mask | parentbit, S3C2410_INTMSK);
+
+       /* write back masks */
+       __raw_writel(submask, S3C2410_INTSUBMSK);
+
+}
+
+static inline void s3c_irqsub_unmask(unsigned int irqno,
+                                    unsigned int parentbit)
+{
+       unsigned long mask;
+       unsigned long submask;
+
+       submask = __raw_readl(S3C2410_INTSUBMSK);
+       mask = __raw_readl(S3C2410_INTMSK);
+
+       submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
+       mask &= ~parentbit;
+
+       /* write back masks */
+       __raw_writel(submask, S3C2410_INTSUBMSK);
+       __raw_writel(mask, S3C2410_INTMSK);
+}
+
+
+static inline void s3c_irqsub_maskack(unsigned int irqno,
+                                     unsigned int parentmask,
+                                     unsigned int group)
+{
+       unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
+
+       s3c_irqsub_mask(irqno, parentmask, group);
+
+       __raw_writel(bit, S3C2410_SUBSRCPND);
+
+       /* only ack parent if we've got all the irqs (seems we must
+        * ack, all and hope that the irq system retriggers ok when
+        * the interrupt goes off again)
+        */
+
+       if (1) {
+               __raw_writel(parentmask, S3C2410_SRCPND);
+               __raw_writel(parentmask, S3C2410_INTPND);
+       }
+}
+
+static inline void s3c_irqsub_ack(unsigned int irqno,
+                                 unsigned int parentmask,
+                                 unsigned int group)
+{
+       unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
+
+       __raw_writel(bit, S3C2410_SUBSRCPND);
+
+       /* only ack parent if we've got all the irqs (seems we must
+        * ack, all and hope that the irq system retriggers ok when
+        * the interrupt goes off again)
+        */
+
+       if (1) {
+               __raw_writel(parentmask, S3C2410_SRCPND);
+               __raw_writel(parentmask, S3C2410_INTPND);
+       }
+}
+
+/* exported for use in arch/arm/mach-s3c2410 */
+
+#ifdef CONFIG_PM
+extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
+#else
+#define s3c_irq_wake NULL
+#endif
+
+extern int s3c_irqext_type(struct irq_data *d, unsigned int type);