| 1 | |
| 2 | |
| 3 | * Author: Huacai Chen <[email protected]>
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| 4 | *
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| 5 | * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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| 6 |
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| 7 | #include <linux/acpi.h>
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| 8 | #include <linux/clk.h>
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| 9 | #include <linux/efi.h>
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| 10 | #include <linux/export.h>
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| 11 | #include <linux/memblock.h>
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| 12 | #include <linux/of_clk.h>
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| 13 | #include <asm/early_ioremap.h>
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| 14 | #include <asm/bootinfo.h>
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| 15 | #include <asm/loongson.h>
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| 16 | #include <asm/setup.h>
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| 17 | #include <asm/time.h>
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| 18 |
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| 19 | u64 efi_system_table;
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| 20 | struct loongson_system_configuration loongson_sysconf;
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| 21 | EXPORT_SYMBOL(loongson_sysconf);
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| 22 |
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| 23 | void __init init_environ(void)
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| 24 | {
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| 25 | int efi_boot = fw_arg0;
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| 26 | char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);
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| 27 |
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| 28 | if (efi_boot)
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| 29 | set_bit(EFI_BOOT, &efi.flags);
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| 30 | else
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| 31 | clear_bit(EFI_BOOT, &efi.flags);
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| 32 |
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| 33 | strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
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| 34 | strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE);
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| 35 | early_memunmap(cmdline, COMMAND_LINE_SIZE);
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| 36 |
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| 37 | efi_system_table = fw_arg2;
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| 38 | }
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| 39 |
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| 40 | static int __init init_cpu_fullname(void)
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| 41 | {
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| 42 | int cpu, ret;
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| 43 | char *cpuname;
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| 44 | const char *model;
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| 45 |
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| 46 |
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| 47 | ret = of_property_read_string(of_root, "model", &model);
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| 48 | if (ret == 0) {
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| 49 | cpuname = kstrdup(model, GFP_KERNEL);
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| 50 | if (!cpuname)
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| 51 | return -ENOMEM;
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| 52 | loongson_sysconf.cpuname = strsep(&cpuname, " ");
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| 53 | }
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| 54 |
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| 55 | if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
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| 56 | for (cpu = 0; cpu < NR_CPUS; cpu++)
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| 57 | __cpu_full_name[cpu] = loongson_sysconf.cpuname;
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| 58 | }
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| 59 | return 0;
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| 60 | }
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| 61 | arch_initcall(init_cpu_fullname);
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| 62 |
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| 63 | static int __init fdt_cpu_clk_init(void)
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| 64 | {
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| 65 | struct clk *clk;
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| 66 | struct device_node *np;
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| 67 |
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| 68 | np = of_get_cpu_node(0, NULL);
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| 69 | if (!np)
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| 70 | return -ENODEV;
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| 71 |
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| 72 | clk = of_clk_get(np, 0);
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| 73 | of_node_put(np);
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| 74 | cpu_clock_freq = 200 * 1000 * 1000;
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| 75 |
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| 76 | if (IS_ERR(clk)) {
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| 77 | pr_warn("No valid CPU clock freq, assume 200MHz.\n");
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| 78 | return -ENODEV;
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| 79 | }
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| 80 |
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| 81 | cpu_clock_freq = clk_get_rate(clk);
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| 82 | clk_put(clk);
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| 83 |
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| 84 | return 0;
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| 85 | }
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| 86 | late_initcall(fdt_cpu_clk_init);
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| 87 |
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| 88 | static ssize_t boardinfo_show(struct kobject *kobj,
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| 89 | struct kobj_attribute *attr, char *buf)
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| 90 | {
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| 91 | return sysfs_emit(buf,
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| 92 | "BIOS Information\n"
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| 93 | "Vendor\t\t\t: %s\n"
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| 94 | "Version\t\t\t: %s\n"
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| 95 | "ROM Size\t\t: %d KB\n"
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| 96 | "Release Date\t\t: %s\n\n"
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| 97 | "Board Information\n"
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| 98 | "Manufacturer\t\t: %s\n"
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| 99 | "Board Name\t\t: %s\n"
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| 100 | "Family\t\t\t: LOONGSON64\n\n",
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| 101 | b_info.bios_vendor, b_info.bios_version,
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| 102 | b_info.bios_size, b_info.bios_release_date,
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| 103 | b_info.board_vendor, b_info.board_name);
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| 104 | }
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| 105 |
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| 106 | static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
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| 107 | boardinfo_show, NULL);
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| 108 |
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| 109 | static int __init boardinfo_init(void)
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| 110 | {
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| 111 | struct kobject *loongson_kobj;
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| 112 |
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| 113 | loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
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| 114 | if (!loongson_kobj)
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| 115 | return -ENOMEM;
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| 116 |
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| 117 | return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
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| 118 | }
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| 119 | late_initcall(boardinfo_init);
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