MN10300: ASB2364: Handle the IRQ multiplexer in the FPGA

Handle the IRQ multiplexer in the FPGA by implementing a cascade interrupt
driver for it.

Signed-off-by: David Howells <dhowells@redhat.com>

2 files changed, 48 insertions, 11 deletions

diff --git a/arch/mn10300/unit-asb2364/include/unit/fpga-regs.h b/arch/mn10300/unit-asb2364/include/unit/fpga-regs.h
index a039a50c91db..7cf12054db65 100644
--- a/arch/mn10300/unit-asb2364/include/unit/fpga-regs.h
+++ b/arch/mn10300/unit-asb2364/include/unit/fpga-regs.h
@@ -14,17 +14,19 @@
 #define ASB2364_FPGA_REG_RESET_USB      __SYSREG(0xa900130c, u16)
 #define ASB2364_FPGA_REG_RESET_AV       __SYSREG(0xa9001310, u16)
 
-#define ASB2364_FPGA_REG_IRQ_LAN        __SYSREG(0xa9001510, u16)
-#define ASB2364_FPGA_REG_IRQ_UART       __SYSREG(0xa9001514, u16)
-#define ASB2364_FPGA_REG_IRQ_I2C        __SYSREG(0xa9001518, u16)
-#define ASB2364_FPGA_REG_IRQ_USB        __SYSREG(0xa900151c, u16)
-#define ASB2364_FPGA_REG_IRQ_FPGA       __SYSREG(0xa9001524, u16)
-
-#define ASB2364_FPGA_REG_MASK_LAN       __SYSREG(0xa9001590, u16)
-#define ASB2364_FPGA_REG_MASK_UART      __SYSREG(0xa9001594, u16)
-#define ASB2364_FPGA_REG_MASK_I2C       __SYSREG(0xa9001598, u16)
-#define ASB2364_FPGA_REG_MASK_USB       __SYSREG(0xa900159c, u16)
-#define ASB2364_FPGA_REG_MASK_FPGA      __SYSREG(0xa90015a4, u16)
+#define ASB2364_FPGA_REG_IRQ(X)         __SYSREG(0xa9001590+((X)*4), u16)
+#define ASB2364_FPGA_REG_IRQ_LAN        ASB2364_FPGA_REG_IRQ(0)
+#define ASB2364_FPGA_REG_IRQ_UART       ASB2364_FPGA_REG_IRQ(1)
+#define ASB2364_FPGA_REG_IRQ_I2C        ASB2364_FPGA_REG_IRQ(2)
+#define ASB2364_FPGA_REG_IRQ_USB        ASB2364_FPGA_REG_IRQ(3)
+#define ASB2364_FPGA_REG_IRQ_FPGA       ASB2364_FPGA_REG_IRQ(5)
+
+#define ASB2364_FPGA_REG_MASK(X)        __SYSREG(0xa9001590+((X)*4), u16)
+#define ASB2364_FPGA_REG_MASK_LAN       ASB2364_FPGA_REG_MASK(0)
+#define ASB2364_FPGA_REG_MASK_UART      ASB2364_FPGA_REG_MASK(1)
+#define ASB2364_FPGA_REG_MASK_I2C       ASB2364_FPGA_REG_MASK(2)
+#define ASB2364_FPGA_REG_MASK_USB       ASB2364_FPGA_REG_MASK(3)
+#define ASB2364_FPGA_REG_MASK_FPGA      ASB2364_FPGA_REG_MASK(5)
 
 #define ASB2364_FPGA_REG_CPLD5_SET1     __SYSREG(0xa9002500, u16)
 #define ASB2364_FPGA_REG_CPLD5_SET2     __SYSREG(0xa9002504, u16)
diff --git a/arch/mn10300/unit-asb2364/include/unit/irq.h b/arch/mn10300/unit-asb2364/include/unit/irq.h
new file mode 100644
index 000000000000..786148e46565
--- /dev/null
+++ b/arch/mn10300/unit-asb2364/include/unit/irq.h
@@ -0,0 +1,35 @@
+/* ASB2364 FPGA irq numbers
+ *
+ * Copyright (C) 2010 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _UNIT_IRQ_H
+#define _UNIT_IRQ_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_SMP
+#define NR_CPU_IRQS     GxICR_NUM_EXT_IRQS
+#else
+#define NR_CPU_IRQS     GxICR_NUM_IRQS
+#endif
+
+enum {
+        FPGA_LAN_IRQ    = NR_CPU_IRQS,
+        FPGA_UART_IRQ,
+        FPGA_I2C_IRQ,
+        FPGA_USB_IRQ,
+        FPGA_RESERVED_IRQ,
+        FPGA_FPGA_IRQ,
+        NR_IRQS
+};
+
+extern void __init irq_fpga_init(void);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _UNIT_IRQ_H */