v4.19.13 snapshot.
diff --git a/arch/sh/boards/mach-microdev/irq.c b/arch/sh/boards/mach-microdev/irq.c
new file mode 100644
index 0000000..9a8aff3
--- /dev/null
+++ b/arch/sh/boards/mach-microdev/irq.c
@@ -0,0 +1,152 @@
+/*
+ * arch/sh/boards/superh/microdev/irq.c
+ *
+ * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
+ *
+ * SuperH SH4-202 MicroDev board support.
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License. See linux/COPYING for more information.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <mach/microdev.h>
+
+#define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */
+
+static const struct {
+ unsigned char fpgaIrq;
+ unsigned char mapped;
+ const char *name;
+} fpgaIrqTable[NUM_EXTERNAL_IRQS] = {
+ { 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */
+ { MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */
+ { MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */
+ { MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */
+ { MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */
+ { 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */
+ { 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */
+ { MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */
+ { MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */
+ { MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */
+ { MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */
+ { MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */
+ { MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */
+ { MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */
+ { MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */
+ { 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */
+};
+
+#if (MICRODEV_LINUX_IRQ_KEYBOARD != 1)
+# error Inconsistancy in defining the IRQ# for Keyboard!
+#endif
+
+#if (MICRODEV_LINUX_IRQ_ETHERNET != 3)
+# error Inconsistancy in defining the IRQ# for Ethernet!
+#endif
+
+#if (MICRODEV_LINUX_IRQ_USB_HC != 7)
+# error Inconsistancy in defining the IRQ# for USB!
+#endif
+
+#if (MICRODEV_LINUX_IRQ_MOUSE != 12)
+# error Inconsistancy in defining the IRQ# for PS/2 Mouse!
+#endif
+
+#if (MICRODEV_LINUX_IRQ_IDE2 != 13)
+# error Inconsistancy in defining the IRQ# for secondary IDE!
+#endif
+
+#if (MICRODEV_LINUX_IRQ_IDE1 != 14)
+# error Inconsistancy in defining the IRQ# for primary IDE!
+#endif
+
+static void disable_microdev_irq(struct irq_data *data)
+{
+ unsigned int irq = data->irq;
+ unsigned int fpgaIrq;
+
+ if (irq >= NUM_EXTERNAL_IRQS)
+ return;
+ if (!fpgaIrqTable[irq].mapped)
+ return;
+
+ fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
+
+ /* disable interrupts on the FPGA INTC register */
+ __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG);
+}
+
+static void enable_microdev_irq(struct irq_data *data)
+{
+ unsigned int irq = data->irq;
+ unsigned long priorityReg, priorities, pri;
+ unsigned int fpgaIrq;
+
+ if (unlikely(irq >= NUM_EXTERNAL_IRQS))
+ return;
+ if (unlikely(!fpgaIrqTable[irq].mapped))
+ return;
+
+ pri = 15 - irq;
+
+ fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
+ priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq);
+
+ /* set priority for the interrupt */
+ priorities = __raw_readl(priorityReg);
+ priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq);
+ priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri);
+ __raw_writel(priorities, priorityReg);
+
+ /* enable interrupts on the FPGA INTC register */
+ __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG);
+}
+
+static struct irq_chip microdev_irq_type = {
+ .name = "MicroDev-IRQ",
+ .irq_unmask = enable_microdev_irq,
+ .irq_mask = disable_microdev_irq,
+};
+
+/* This function sets the desired irq handler to be a MicroDev type */
+static void __init make_microdev_irq(unsigned int irq)
+{
+ disable_irq_nosync(irq);
+ irq_set_chip_and_handler(irq, µdev_irq_type, handle_level_irq);
+ disable_microdev_irq(irq_get_irq_data(irq));
+}
+
+extern void __init init_microdev_irq(void)
+{
+ int i;
+
+ /* disable interrupts on the FPGA INTC register */
+ __raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG);
+
+ for (i = 0; i < NUM_EXTERNAL_IRQS; i++)
+ make_microdev_irq(i);
+}
+
+extern void microdev_print_fpga_intc_status(void)
+{
+ volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG;
+ volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG;
+ volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0);
+ volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8);
+ volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16);
+ volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24);
+ volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG;
+ volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG;
+
+ printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n");
+ printk("FPGA_INTENB = 0x%08x\n", *intenb);
+ printk("FPGA_INTDSB = 0x%08x\n", *intdsb);
+ printk("FPGA_INTSRC = 0x%08x\n", *intsrc);
+ printk("FPGA_INTREQ = 0x%08x\n", *intreq);
+ printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria);
+ printk("-------------------------------------------------------------------------------\n");
+}