1 files changed, 151 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-se/7206/irq.c b/arch/sh/boards/mach-se/7206/irq.c
new file mode 100644
index 000000000..2b1537082
--- /dev/null
+++ b/arch/sh/boards/mach-se/7206/irq.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/sh/boards/se/7206/irq.c
+ *
+ * Copyright (C) 2005,2006 Yoshinori Sato
+ *
+ * Hitachi SolutionEngine Support.
+ *
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <mach-se/mach/se7206.h>
+
+#define INTSTS0 0x31800000
+#define INTSTS1 0x31800002
+#define INTMSK0 0x31800004
+#define INTMSK1 0x31800006
+#define INTSEL  0x31800008
+
+#define IRQ0_IRQ 64
+#define IRQ1_IRQ 65
+#define IRQ3_IRQ 67
+
+#define INTC_IPR01 0xfffe0818
+#define INTC_ICR1  0xfffe0802
+
+static void disable_se7206_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	unsigned short val;
+	unsigned short mask = 0xffff ^ (0x0f << 4 * (3 - (IRQ0_IRQ - irq)));
+	unsigned short msk0,msk1;
+
+	/* Set the priority in IPR to 0 */
+	val = __raw_readw(INTC_IPR01);
+	val &= mask;
+	__raw_writew(val, INTC_IPR01);
+	/* FPGA mask set */
+	msk0 = __raw_readw(INTMSK0);
+	msk1 = __raw_readw(INTMSK1);
+
+	switch (irq) {
+	case IRQ0_IRQ:
+		msk0 |= 0x0010;
+		break;
+	case IRQ1_IRQ:
+		msk0 |= 0x000f;
+		break;
+	case IRQ3_IRQ:
+		msk0 |= 0x0f00;
+		msk1 |= 0x00ff;
+		break;
+	}
+	__raw_writew(msk0, INTMSK0);
+	__raw_writew(msk1, INTMSK1);
+}
+
+static void enable_se7206_irq(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+	unsigned short val;
+	unsigned short value = (0x0001 << 4 * (3 - (IRQ0_IRQ - irq)));
+	unsigned short msk0,msk1;
+
+	/* Set priority in IPR back to original value */
+	val = __raw_readw(INTC_IPR01);
+	val |= value;
+	__raw_writew(val, INTC_IPR01);
+
+	/* FPGA mask reset */
+	msk0 = __raw_readw(INTMSK0);
+	msk1 = __raw_readw(INTMSK1);
+
+	switch (irq) {
+	case IRQ0_IRQ:
+		msk0 &= ~0x0010;
+		break;
+	case IRQ1_IRQ:
+		msk0 &= ~0x000f;
+		break;
+	case IRQ3_IRQ:
+		msk0 &= ~0x0f00;
+		msk1 &= ~0x00ff;
+		break;
+	}
+	__raw_writew(msk0, INTMSK0);
+	__raw_writew(msk1, INTMSK1);
+}
+
+static void eoi_se7206_irq(struct irq_data *data)
+{
+	unsigned short sts0,sts1;
+	unsigned int irq = data->irq;
+
+	if (!irqd_irq_disabled(data) && !irqd_irq_inprogress(data))
+		enable_se7206_irq(data);
+	/* FPGA isr clear */
+	sts0 = __raw_readw(INTSTS0);
+	sts1 = __raw_readw(INTSTS1);
+
+	switch (irq) {
+	case IRQ0_IRQ:
+		sts0 &= ~0x0010;
+		break;
+	case IRQ1_IRQ:
+		sts0 &= ~0x000f;
+		break;
+	case IRQ3_IRQ:
+		sts0 &= ~0x0f00;
+		sts1 &= ~0x00ff;
+		break;
+	}
+	__raw_writew(sts0, INTSTS0);
+	__raw_writew(sts1, INTSTS1);
+}
+
+static struct irq_chip se7206_irq_chip __read_mostly = {
+	.name		= "SE7206-FPGA",
+	.irq_mask	= disable_se7206_irq,
+	.irq_unmask	= enable_se7206_irq,
+	.irq_eoi	= eoi_se7206_irq,
+};
+
+static void make_se7206_irq(unsigned int irq)
+{
+	disable_irq_nosync(irq);
+	irq_set_chip_and_handler_name(irq, &se7206_irq_chip,
+				      handle_level_irq, "level");
+	disable_se7206_irq(irq_get_irq_data(irq));
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_se7206_IRQ(void)
+{
+	make_se7206_irq(IRQ0_IRQ); /* SMC91C111 */
+	make_se7206_irq(IRQ1_IRQ); /* ATA */
+	make_se7206_irq(IRQ3_IRQ); /* SLOT / PCM */
+
+	__raw_writew(__raw_readw(INTC_ICR1) | 0x000b, INTC_ICR1); /* ICR1 */
+
+	/* FPGA System register setup*/
+	__raw_writew(0x0000,INTSTS0); /* Clear INTSTS0 */
+	__raw_writew(0x0000,INTSTS1); /* Clear INTSTS1 */
+
+	/* IRQ0=LAN, IRQ1=ATA, IRQ3=SLT,PCM */
+	__raw_writew(0x0001,INTSEL);
+}