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Diffstat (limited to 'arch/frv/kernel/irq-mb93493.c')
-rw-r--r--arch/frv/kernel/irq-mb93493.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/frv/kernel/irq-mb93493.c b/arch/frv/kernel/irq-mb93493.c
new file mode 100644
index 00000000000..c003ae5e2b3
--- /dev/null
+++ b/arch/frv/kernel/irq-mb93493.c
@@ -0,0 +1,108 @@
+/* irq-mb93493.c: MB93493 companion chip interrupt handler
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/irc-regs.h>
+#include <asm/irq-routing.h>
+#include <asm/mb93493-irqs.h>
+
+static void frv_mb93493_doirq(struct irq_source *source);
+
+/*****************************************************************************/
+/*
+ * MB93493 companion chip IRQ multiplexor
+ */
+static struct irq_source frv_mb93493[2] = {
+ [0] = {
+ .muxname = "mb93493.0",
+ .muxdata = __region_CS3 + 0x3d0,
+ .doirq = frv_mb93493_doirq,
+ .irqmask = 0x0000,
+ },
+ [1] = {
+ .muxname = "mb93493.1",
+ .muxdata = __region_CS3 + 0x3d4,
+ .doirq = frv_mb93493_doirq,
+ .irqmask = 0x0000,
+ },
+};
+
+static void frv_mb93493_control(struct irq_group *group, int index, int on)
+{
+ struct irq_source *source;
+ uint32_t iqsr;
+
+ if ((frv_mb93493[0].irqmask & (1 << index)))
+ source = &frv_mb93493[0];
+ else
+ source = &frv_mb93493[1];
+
+ iqsr = readl(source->muxdata);
+ if (on)
+ iqsr |= 1 << (index + 16);
+ else
+ iqsr &= ~(1 << (index + 16));
+
+ writel(iqsr, source->muxdata);
+}
+
+static struct irq_group frv_mb93493_irqs = {
+ .first_irq = IRQ_BASE_MB93493,
+ .control = frv_mb93493_control,
+};
+
+static void frv_mb93493_doirq(struct irq_source *source)
+{
+ uint32_t mask = readl(source->muxdata);
+ mask = mask & (mask >> 16) & 0xffff;
+
+ if (mask)
+ distribute_irqs(&frv_mb93493_irqs, mask);
+}
+
+static void __init mb93493_irq_route(int irq, int source)
+{
+ frv_mb93493[source].irqmask |= 1 << (irq - IRQ_BASE_MB93493);
+ frv_mb93493_irqs.sources[irq - IRQ_BASE_MB93493] = &frv_mb93493[source];
+}
+
+void __init route_mb93493_irqs(void)
+{
+ frv_irq_route_external(&frv_mb93493[0], IRQ_CPU_MB93493_0);
+ frv_irq_route_external(&frv_mb93493[1], IRQ_CPU_MB93493_1);
+
+ frv_irq_set_group(&frv_mb93493_irqs);
+
+ mb93493_irq_route(IRQ_MB93493_VDC, IRQ_MB93493_VDC_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_VCC, IRQ_MB93493_VCC_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_AUDIO_IN, IRQ_MB93493_AUDIO_IN_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_I2C_0, IRQ_MB93493_I2C_0_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_I2C_1, IRQ_MB93493_I2C_1_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_USB, IRQ_MB93493_USB_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_LOCAL_BUS, IRQ_MB93493_LOCAL_BUS_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_PCMCIA, IRQ_MB93493_PCMCIA_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_GPIO, IRQ_MB93493_GPIO_ROUTE);
+ mb93493_irq_route(IRQ_MB93493_AUDIO_OUT, IRQ_MB93493_AUDIO_OUT_ROUTE);
+}