1 files changed, 147 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..488c0bee7
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/init.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson, joshua.henderson@microchip.com
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#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_passed_dtb && !fw_arg2 && !fw_arg3)
+                return (ulong)fw_passed_dtb;
+
+        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();
+#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_default_populate(NULL, pic32_auxdata_lookup, NULL))
+                panic("Failed to populate DT");
+
+        return 0;
+}
+arch_initcall(plat_of_setup);