Linux-libre 4.5-gnu

1 files changed, 156 insertions, 0 deletions

diff --git a/arch/mips/pic32/pic32mzda/init.c b/arch/mips/pic32/pic32mzda/init.c
new file mode 100644
index 000000000..775ff90a9
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/init.c
@@ -0,0 +1,156 @@
+/*
+ * Joshua Henderson, joshua.henderson@microchip.com
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+#include <linux/platform_data/sdhci-pic32.h>
+
+#include <asm/fw/fw.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/prom.h>
+
+#include "pic32mzda.h"
+
+const char *get_system_type(void)
+{
+	return "PIC32MZDA";
+}
+
+static ulong get_fdtaddr(void)
+{
+	ulong ftaddr = 0;
+
+	if ((fw_arg0 == -2) && fw_arg1 && !fw_arg2 && !fw_arg3)
+		return (ulong)fw_arg1;
+
+	if (__dtb_start < __dtb_end)
+		ftaddr = (ulong)__dtb_start;
+
+	return ftaddr;
+}
+
+void __init plat_mem_setup(void)
+{
+	void *dtb;
+
+	dtb = (void *)get_fdtaddr();
+	if (!dtb) {
+		pr_err("pic32: no DTB found.\n");
+		return;
+	}
+
+	/*
+	 * Load the builtin device tree. This causes the chosen node to be
+	 * parsed resulting in our memory appearing.
+	 */
+	__dt_setup_arch(dtb);
+
+	pr_info("Found following command lines\n");
+	pr_info(" boot_command_line: %s\n", boot_command_line);
+	pr_info(" arcs_cmdline     : %s\n", arcs_cmdline);
+#ifdef CONFIG_CMDLINE_BOOL
+	pr_info(" builtin_cmdline  : %s\n", CONFIG_CMDLINE);
+#endif
+	if (dtb != __dtb_start)
+		strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+
+#ifdef CONFIG_EARLY_PRINTK
+	fw_init_early_console(-1);
+#endif
+	pic32_config_init();
+}
+
+static __init void pic32_init_cmdline(int argc, char *argv[])
+{
+	unsigned int count = COMMAND_LINE_SIZE - 1;
+	int i;
+	char *dst = &(arcs_cmdline[0]);
+	char *src;
+
+	for (i = 1; i < argc && count; ++i) {
+		src = argv[i];
+		while (*src && count) {
+			*dst++ = *src++;
+			--count;
+		}
+		*dst++ = ' ';
+	}
+	if (i > 1)
+		--dst;
+
+	*dst = 0;
+}
+
+void __init prom_init(void)
+{
+	pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init device_tree_init(void)
+{
+	if (!initial_boot_params)
+		return;
+
+	unflatten_and_copy_device_tree();
+}
+
+static struct pic32_sdhci_platform_data sdhci_data = {
+	.setup_dma = pic32_set_sdhci_adma_fifo_threshold,
+};
+
+static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
+	{ /* sentinel */}
+};
+
+static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
+{
+	struct device_node *root, *np;
+	struct resource res;
+
+	root = of_find_node_by_path("/");
+
+	for (; lookup->compatible; lookup++) {
+		np = of_find_compatible_node(NULL, NULL, lookup->compatible);
+		if (np) {
+			lookup->name = (char *)np->name;
+			if (lookup->phys_addr)
+				continue;
+			if (!of_address_to_resource(np, 0, &res))
+				lookup->phys_addr = res.start;
+		}
+	}
+
+	return 0;
+}
+
+static int __init plat_of_setup(void)
+{
+	if (!of_have_populated_dt())
+		panic("Device tree not present");
+
+	pic32_of_prepare_platform_data(pic32_auxdata_lookup);
+	if (of_platform_populate(NULL, of_default_bus_match_table,
+				 pic32_auxdata_lookup, NULL))
+		panic("Failed to populate DT");
+
+	return 0;
+}
+arch_initcall(plat_of_setup);