mirror of https://github.com/hak5/openwrt-owl.git
128 lines
3.4 KiB
Diff
128 lines
3.4 KiB
Diff
From 3a5bfe7bdbfd37c9206d7c6dfd7eb9664ccc5038 Mon Sep 17 00:00:00 2001
|
|
From: John Crispin <blogic@openwrt.org>
|
|
Date: Sun, 20 Jan 2013 22:02:01 +0100
|
|
Subject: [PATCH 06/14] MIPS: ralink: adds OF code
|
|
|
|
Until there is a generic MIPS way of handing the DTB over from bootloader to
|
|
kernel we rely on a built in devicetrees. The OF code also remaps those register
|
|
ranges that we use global in our drivers.
|
|
|
|
Signed-off-by: John Crispin <blogic@openwrt.org>
|
|
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
|
|
Patchwork: http://patchwork.linux-mips.org/patch/4895/
|
|
---
|
|
arch/mips/ralink/of.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 107 insertions(+)
|
|
create mode 100644 arch/mips/ralink/of.c
|
|
|
|
--- /dev/null
|
|
+++ b/arch/mips/ralink/of.c
|
|
@@ -0,0 +1,107 @@
|
|
+/*
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License version 2 as published
|
|
+ * by the Free Software Foundation.
|
|
+ *
|
|
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
|
+ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
|
|
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
|
|
+ */
|
|
+
|
|
+#include <linux/io.h>
|
|
+#include <linux/clk.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/of_fdt.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/bootmem.h>
|
|
+#include <linux/of_platform.h>
|
|
+#include <linux/of_address.h>
|
|
+
|
|
+#include <asm/reboot.h>
|
|
+#include <asm/bootinfo.h>
|
|
+#include <asm/addrspace.h>
|
|
+
|
|
+#include "common.h"
|
|
+
|
|
+__iomem void *rt_sysc_membase;
|
|
+__iomem void *rt_memc_membase;
|
|
+
|
|
+extern struct boot_param_header __dtb_start;
|
|
+
|
|
+__iomem void *plat_of_remap_node(const char *node)
|
|
+{
|
|
+ struct resource res;
|
|
+ struct device_node *np;
|
|
+
|
|
+ np = of_find_compatible_node(NULL, NULL, node);
|
|
+ if (!np)
|
|
+ panic("Failed to find %s node", node);
|
|
+
|
|
+ if (of_address_to_resource(np, 0, &res))
|
|
+ panic("Failed to get resource for %s", node);
|
|
+
|
|
+ if ((request_mem_region(res.start,
|
|
+ resource_size(&res),
|
|
+ res.name) < 0))
|
|
+ panic("Failed to request resources for %s", node);
|
|
+
|
|
+ return ioremap_nocache(res.start, resource_size(&res));
|
|
+}
|
|
+
|
|
+void __init device_tree_init(void)
|
|
+{
|
|
+ unsigned long base, size;
|
|
+ void *fdt_copy;
|
|
+
|
|
+ if (!initial_boot_params)
|
|
+ return;
|
|
+
|
|
+ base = virt_to_phys((void *)initial_boot_params);
|
|
+ size = be32_to_cpu(initial_boot_params->totalsize);
|
|
+
|
|
+ /* Before we do anything, lets reserve the dt blob */
|
|
+ reserve_bootmem(base, size, BOOTMEM_DEFAULT);
|
|
+
|
|
+ /* The strings in the flattened tree are referenced directly by the
|
|
+ * device tree, so copy the flattened device tree from init memory
|
|
+ * to regular memory.
|
|
+ */
|
|
+ fdt_copy = alloc_bootmem(size);
|
|
+ memcpy(fdt_copy, initial_boot_params, size);
|
|
+ initial_boot_params = fdt_copy;
|
|
+
|
|
+ unflatten_device_tree();
|
|
+
|
|
+ /* free the space reserved for the dt blob */
|
|
+ free_bootmem(base, size);
|
|
+}
|
|
+
|
|
+void __init plat_mem_setup(void)
|
|
+{
|
|
+ set_io_port_base(KSEG1);
|
|
+
|
|
+ /*
|
|
+ * Load the builtin devicetree. This causes the chosen node to be
|
|
+ * parsed resulting in our memory appearing
|
|
+ */
|
|
+ __dt_setup_arch(&__dtb_start);
|
|
+}
|
|
+
|
|
+static int __init plat_of_setup(void)
|
|
+{
|
|
+ static struct of_device_id of_ids[3];
|
|
+ int len = sizeof(of_ids[0].compatible);
|
|
+
|
|
+ if (!of_have_populated_dt())
|
|
+ panic("device tree not present");
|
|
+
|
|
+ strncpy(of_ids[0].compatible, soc_info.compatible, len);
|
|
+ strncpy(of_ids[1].compatible, "palmbus", len);
|
|
+
|
|
+ if (of_platform_populate(NULL, of_ids, NULL, NULL))
|
|
+ panic("failed to populate DT\n");
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+arch_initcall(plat_of_setup);
|