MIPS: TXx9: Add RBTX4939 board support

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/txx9/rbtx4939/Makefile
 create mode 100644 arch/mips/txx9/rbtx4939/irq.c
 create mode 100644 arch/mips/txx9/rbtx4939/prom.c
 create mode 100644 arch/mips/txx9/rbtx4939/setup.c
 create mode 100644 include/asm-mips/txx9/rbtx4939.h

arch/mips/Makefile

@@ -567,15 +567,11 @@ cflags-$(CONFIG_MIKROTIK_RB532) += -Iinclude/asm-mips/mach-rc32434
 load-$(CONFIG_MIKROTIK_RB532)	+= 0xffffffff80101000
 
 #
-# Toshiba RBTX4927 board or
-# Toshiba RBTX4937 board
+# Toshiba RBTX49XX boards
 #
 core-$(CONFIG_TOSHIBA_RBTX4927)	+= arch/mips/txx9/rbtx4927/
-
-#
-# Toshiba RBTX4938 board
-#
 core-$(CONFIG_TOSHIBA_RBTX4938) += arch/mips/txx9/rbtx4938/
+core-$(CONFIG_TOSHIBA_RBTX4939) += arch/mips/txx9/rbtx4939/
 
 cflags-y			+= -Iinclude/asm-mips/mach-generic
 drivers-$(CONFIG_PCI)		+= arch/mips/pci/

arch/mips/txx9/Kconfig

@@ -45,6 +45,14 @@ config TOSHIBA_RBTX4938
 	  This Toshiba board is based on the TX4938 processor. Say Y here to
 	  support this machine type
 
+config TOSHIBA_RBTX4939
+	bool "Toshiba RBTX4939 bobard"
+	depends on MACH_TX49XX
+	select SOC_TX4939
+	help
+	  This Toshiba board is based on the TX4939 processor. Say Y here to
+	  support this machine type
+
 config SOC_TX3927
 	bool
 	select CEVT_TXX9

arch/mips/txx9/generic/setup.c

@@ -371,6 +371,11 @@ static void __init select_board(void)
 	case 0x4938:
 		txx9_board_vec = &rbtx4938_vec;
 		break;
+#endif
+#ifdef CONFIG_TOSHIBA_RBTX4939
+	case 0x4939:
+		txx9_board_vec = &rbtx4939_vec;
+		break;
 #endif
 	}
 #endif

arch/mips/txx9/rbtx4939/Makefile

@@ -0,0 +1,3 @@
+obj-y	 += irq.o setup.o prom.o
+
+EXTRA_CFLAGS += -Werror

arch/mips/txx9/rbtx4939/irq.c

@@ -0,0 +1,96 @@
+/*
+ * Toshiba RBTX4939 interrupt routines
+ * Based on linux/arch/mips/txx9/rbtx4938/irq.c,
+ *	    and RBTX49xx patch from CELF patch archive.
+ *
+ * Copyright (C) 2000-2001,2005-2006 Toshiba Corporation
+ * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/mipsregs.h>
+#include <asm/txx9/rbtx4939.h>
+
+/*
+ * RBTX4939 IOC controller definition
+ */
+
+static void rbtx4939_ioc_irq_unmask(unsigned int irq)
+{
+	int ioc_nr = irq - RBTX4939_IRQ_IOC;
+
+	writeb(readb(rbtx4939_ien_addr) | (1 << ioc_nr), rbtx4939_ien_addr);
+}
+
+static void rbtx4939_ioc_irq_mask(unsigned int irq)
+{
+	int ioc_nr = irq - RBTX4939_IRQ_IOC;
+
+	writeb(readb(rbtx4939_ien_addr) & ~(1 << ioc_nr), rbtx4939_ien_addr);
+	mmiowb();
+}
+
+static struct irq_chip rbtx4939_ioc_irq_chip = {
+	.name		= "IOC",
+	.ack		= rbtx4939_ioc_irq_mask,
+	.mask		= rbtx4939_ioc_irq_mask,
+	.mask_ack	= rbtx4939_ioc_irq_mask,
+	.unmask		= rbtx4939_ioc_irq_unmask,
+};
+
+
+static inline int rbtx4939_ioc_irqroute(void)
+{
+	unsigned char istat = readb(rbtx4939_ifac2_addr);
+
+	if (unlikely(istat == 0))
+		return -1;
+	return RBTX4939_IRQ_IOC + __fls8(istat);
+}
+
+static int rbtx4939_irq_dispatch(int pending)
+{
+	int irq;
+
+	if (pending & CAUSEF_IP7)
+		return MIPS_CPU_IRQ_BASE + 7;
+	irq = tx4939_irq();
+	if (likely(irq >= 0)) {
+		/* redirect IOC interrupts */
+		switch (irq) {
+		case RBTX4939_IRQ_IOCINT:
+			irq = rbtx4939_ioc_irqroute();
+			break;
+		}
+	} else if (pending & CAUSEF_IP0)
+		irq = MIPS_CPU_IRQ_BASE + 0;
+	else if (pending & CAUSEF_IP1)
+		irq = MIPS_CPU_IRQ_BASE + 1;
+	else
+		irq = -1;
+	return irq;
+}
+
+void __init rbtx4939_irq_setup(void)
+{
+	int i;
+
+	/* mask all IOC interrupts */
+	writeb(0, rbtx4939_ien_addr);
+
+	/* clear SoftInt interrupts */
+	writeb(0, rbtx4939_softint_addr);
+
+	txx9_irq_dispatch = rbtx4939_irq_dispatch;
+
+	tx4939_irq_init();
+	for (i = RBTX4939_IRQ_IOC;
+	     i < RBTX4939_IRQ_IOC + RBTX4939_NR_IRQ_IOC; i++)
+		set_irq_chip_and_handler(i, &rbtx4939_ioc_irq_chip,
+					 handle_level_irq);
+
+	set_irq_chained_handler(RBTX4939_IRQ_IOCINT, handle_simple_irq);
+}

arch/mips/txx9/rbtx4939/prom.c

@@ -0,0 +1,17 @@
+/*
+ * rbtx4939 specific prom routines
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/rbtx4939.h>
+
+void __init rbtx4939_prom_init(void)
+{
+	tx4939_add_memory_regions();
+	txx9_sio_putchar_init(TX4939_SIO_REG(0) & 0xfffffffffULL);
+}