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130 lines
2.7 KiB
130 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Joshua Henderson, [email protected] |
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* Copyright (C) 2015 Microchip Technology Inc. All rights reserved. |
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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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void __init plat_mem_setup(void) |
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{ |
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void *dtb; |
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dtb = get_fdt(); |
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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 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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