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