15f37e1588
Instead of rewriting the arguments to match the UHI spec, store the address of a appended or UHI supplied dtb in fw_supplied_dtb. That way the original bootloader arugments are kept intact while still making the use of an appended dtb invisible for mach code. Mach code can still find out if it is an appended dtb by comparing fw_arg1 with fw_supplied_dtb. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: John Crispin <john@phrozen.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Alban Bedel <albeu@free.fr> Cc: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us> Cc: Antony Pavlov <antonynpavlov@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13699/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
/*
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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_populate(NULL, of_default_bus_match_table,
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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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