[POWERPC] 83xx: Add base support for the MPC8313E RDB

Add support for the MPC8313E Reference Development Board (RDB).  The board
is a mini-ITX reference board with 128M DDR2, 8M flash, 32M NAND, USB, PCI,
gigabit ethernet, and serial.

Signed-off-by: Wilson Lo <Wilson.Lo@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

3 files changed, 112 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/83xx/Kconfig b/arch/powerpc/platforms/83xx/Kconfig
index edcd5b875b66..46883c5136ac 100644
--- a/arch/powerpc/platforms/83xx/Kconfig
+++ b/arch/powerpc/platforms/83xx/Kconfig
@@ -5,6 +5,12 @@ choice
         prompt "Machine Type"
         default MPC834x_SYS
 
+config MPC8313_RDB
+        bool "Freescale MPC8313 RDB"
+        select DEFAULT_UIMAGE
+        help
+          This option enables support for the MPC8313 RDB board.
+
 config MPC832x_MDS
         bool "Freescale MPC832x MDS"
         select DEFAULT_UIMAGE
@@ -41,6 +47,12 @@ config MPC8360E_PB
 
 endchoice
 
+config PPC_MPC831x
+        bool
+        select PPC_UDBG_16550
+        select PPC_INDIRECT_PCI
+        default y if MPC8313_RDB
+
 config PPC_MPC832x
         bool
         select PPC_UDBG_16550
diff --git a/arch/powerpc/platforms/83xx/Makefile b/arch/powerpc/platforms/83xx/Makefile
index f1aa7e24a938..0b732a79c0a8 100644
--- a/arch/powerpc/platforms/83xx/Makefile
+++ b/arch/powerpc/platforms/83xx/Makefile
@@ -3,6 +3,7 @@
 #
 obj-y                           := misc.o
 obj-$(CONFIG_PCI)               += pci.o
+obj-$(CONFIG_MPC8313_RDB)       += mpc8313_rdb.o
 obj-$(CONFIG_MPC834x_SYS)       += mpc834x_sys.o
 obj-$(CONFIG_MPC834x_ITX)       += mpc834x_itx.o
 obj-$(CONFIG_MPC8360E_PB)       += mpc8360e_pb.o
diff --git a/arch/powerpc/platforms/83xx/mpc8313_rdb.c b/arch/powerpc/platforms/83xx/mpc8313_rdb.c
new file mode 100644
index 000000000000..c3b98c34eb6b
--- /dev/null
+++ b/arch/powerpc/platforms/83xx/mpc8313_rdb.c
@@ -0,0 +1,99 @@
+/*
+ * arch/powerpc/platforms/83xx/mpc8313_rdb.c
+ *
+ * Description: MPC8313x RDB board specific routines.
+ * This file is based on mpc834x_sys.c
+ * Author: Lo Wlison <r43300@freescale.com>
+ *
+ * Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved.
+ *
+ * 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/pci.h>
+
+#include <asm/time.h>
+#include <asm/ipic.h>
+#include <asm/udbg.h>
+
+#include "mpc83xx.h"
+
+#undef DEBUG
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+#ifndef CONFIG_PCI
+unsigned long isa_io_base = 0;
+unsigned long isa_mem_base = 0;
+#endif
+
+/* ************************************************************************
+ *
+ * Setup the architecture
+ *
+ */
+static void __init mpc8313_rdb_setup_arch(void)
+{
+        struct device_node *np;
+
+        if (ppc_md.progress)
+                ppc_md.progress("mpc8313_rdb_setup_arch()", 0);
+
+#ifdef CONFIG_PCI
+        for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
+                add_bridge(np);
+
+        ppc_md.pci_exclude_device = mpc83xx_exclude_device;
+#endif
+}
+
+void __init mpc8313_rdb_init_IRQ(void)
+{
+        struct device_node *np;
+
+        np = of_find_node_by_type(NULL, "ipic");
+        if (!np)
+                return;
+
+        ipic_init(np, 0);
+
+        /* Initialize the default interrupt mapping priorities,
+         * in case the boot rom changed something on us.
+         */
+        ipic_set_default_priority();
+}
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init mpc8313_rdb_probe(void)
+{
+        char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
+                                          "model", NULL);
+        if (model == NULL)
+                return 0;
+        if (strcmp(model, "MPC8313ERDB"))
+                return 0;
+
+        DBG("MPC8313 RDB found\n");
+
+        return 1;
+}
+
+define_machine(mpc8313_rdb) {
+        .name                   = "MPC8313 RDB",
+        .probe                  = mpc8313_rdb_probe,
+        .setup_arch             = mpc8313_rdb_setup_arch,
+        .init_IRQ               = mpc8313_rdb_init_IRQ,
+        .get_irq                = ipic_get_irq,
+        .restart                = mpc83xx_restart,
+        .time_init              = mpc83xx_time_init,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = udbg_progress,
+};