This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / mach-s3c2410 / s3c244x-irq.c

diff --git a/arch/arm/mach-s3c2410/s3c244x-irq.c b/arch/arm/mach-s3c2410/s3c244x-irq.c
new file mode 100644 (file)
index 0000000..44c5aff
--- /dev/null
+++ b/arch/arm/mach-s3c2410/s3c244x-irq.c
@@ -0,0 +1,142 @@
+/* linux/arch/arm/mach-s3c2410/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 "cpu.h"
+#include "pm.h"
+#include "irq.h"
+
+/* camera irq */
+
+static void s3c_irq_demux_cam(unsigned int irq,
+                             struct irqdesc *desc,
+                             struct pt_regs *regs)
+{
+       unsigned int subsrc, submsk;
+       struct irqdesc *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 >>= 11;
+       subsrc &= 3;
+
+       if (subsrc != 0) {
+               if (subsrc & 1) {
+                       mydesc = irq_desc + IRQ_S3C2440_CAM_C;
+                       desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc, regs);
+               }
+               if (subsrc & 2) {
+                       mydesc = irq_desc + IRQ_S3C2440_CAM_P;
+                       desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc, regs);
+               }
+       }
+}
+
+#define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
+
+static void
+s3c_irq_cam_mask(unsigned int irqno)
+{
+       s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
+}
+
+static void
+s3c_irq_cam_unmask(unsigned int irqno)
+{
+       s3c_irqsub_unmask(irqno, INTMSK_CAM);
+}
+
+static void
+s3c_irq_cam_ack(unsigned int irqno)
+{
+       s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
+}
+
+static struct irqchip s3c_irq_cam = {
+       .mask       = s3c_irq_cam_mask,
+       .unmask     = s3c_irq_cam_unmask,
+       .ack        = s3c_irq_cam_ack,
+};
+
+static int s3c244x_irq_add(struct sys_device *sysdev)
+{
+       unsigned int irqno;
+
+       set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
+       set_irq_handler(IRQ_NFCON, do_level_IRQ);
+       set_irq_flags(IRQ_NFCON, IRQF_VALID);
+
+       /* add chained handler for camera */
+
+       set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
+       set_irq_handler(IRQ_CAM, do_level_IRQ);
+       set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
+
+       for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
+               set_irq_chip(irqno, &s3c_irq_cam);
+               set_irq_handler(irqno, do_level_IRQ);
+               set_irq_flags(irqno, IRQF_VALID);
+       }
+
+       return 0;
+}
+
+static struct sysdev_driver s3c2440_irq_driver = {
+       .add    = s3c244x_irq_add,
+};
+
+static int s3c2440_irq_init(void)
+{
+       return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
+}
+
+arch_initcall(s3c2440_irq_init);
+
+static struct sysdev_driver s3c2442_irq_driver = {
+       .add    = s3c244x_irq_add,
+};
+
+static int s3c2442_irq_init(void)
+{
+       return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
+}
+
+arch_initcall(s3c2442_irq_init);