12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2eed0eabdSPaul Burton /* 3eed0eabdSPaul Burton * Copyright (C) 2016 Imagination Technologies 448c834beSPaul Burton * Author: Paul Burton <paul.burton@mips.com> 5eed0eabdSPaul Burton */ 6eed0eabdSPaul Burton 7eed0eabdSPaul Burton #include <linux/clk.h> 8eed0eabdSPaul Burton #include <linux/clocksource.h> 9eed0eabdSPaul Burton #include <linux/init.h> 10eed0eabdSPaul Burton #include <linux/irqchip.h> 11089a792cSGeert Uytterhoeven #include <linux/of_clk.h> 12eed0eabdSPaul Burton #include <linux/of_fdt.h> 13eed0eabdSPaul Burton 14b47e9c62SPaul Burton #include <asm/bootinfo.h> 15eed0eabdSPaul Burton #include <asm/fw/fw.h> 16eed0eabdSPaul Burton #include <asm/irq_cpu.h> 17eed0eabdSPaul Burton #include <asm/machine.h> 187f005f11SMatt Redfearn #include <asm/mips-cps.h> 19eed0eabdSPaul Burton #include <asm/prom.h> 20eed0eabdSPaul Burton #include <asm/smp-ops.h> 21eed0eabdSPaul Burton #include <asm/time.h> 22eed0eabdSPaul Burton 23a14bf1dcSTiezhu Yang static __initconst const void *fdt; 24a14bf1dcSTiezhu Yang static __initconst const struct mips_machine *mach; 25a14bf1dcSTiezhu Yang static __initconst const void *mach_match_data; 26eed0eabdSPaul Burton 27eed0eabdSPaul Burton void __init prom_init(void) 28eed0eabdSPaul Burton { 299a59061cSMatt Redfearn plat_get_fdt(); 309a59061cSMatt Redfearn BUG_ON(!fdt); 319a59061cSMatt Redfearn } 329a59061cSMatt Redfearn 339a59061cSMatt Redfearn void __init *plat_get_fdt(void) 349a59061cSMatt Redfearn { 35eed0eabdSPaul Burton const struct mips_machine *check_mach; 36eed0eabdSPaul Burton const struct of_device_id *match; 37eed0eabdSPaul Burton 389a59061cSMatt Redfearn if (fdt) 399a59061cSMatt Redfearn /* Already set up */ 409a59061cSMatt Redfearn return (void *)fdt; 419a59061cSMatt Redfearn 42*b83ba0b9SThomas Bogendoerfer fdt = (void *)get_fdt(); 43*b83ba0b9SThomas Bogendoerfer if (fdt && !fdt_check_header(fdt)) { 44eed0eabdSPaul Burton /* 45323690d2SPaul Cercueil * We have been provided with the appropriate device tree for 46323690d2SPaul Cercueil * the board. Make use of it & search for any machine struct 47323690d2SPaul Cercueil * based upon the root compatible string. 48eed0eabdSPaul Burton */ 49eed0eabdSPaul Burton for_each_mips_machine(check_mach) { 50eed0eabdSPaul Burton match = mips_machine_is_compatible(check_mach, fdt); 51eed0eabdSPaul Burton if (match) { 52eed0eabdSPaul Burton mach = check_mach; 53eed0eabdSPaul Burton mach_match_data = match->data; 54eed0eabdSPaul Burton break; 55eed0eabdSPaul Burton } 56eed0eabdSPaul Burton } 57eed0eabdSPaul Burton } else if (IS_ENABLED(CONFIG_LEGACY_BOARDS)) { 58eed0eabdSPaul Burton /* 59eed0eabdSPaul Burton * We weren't booted using the UHI boot protocol, but do 60eed0eabdSPaul Burton * support some number of boards with legacy boot protocols. 61eed0eabdSPaul Burton * Attempt to find the right one. 62eed0eabdSPaul Burton */ 63eed0eabdSPaul Burton for_each_mips_machine(check_mach) { 64eed0eabdSPaul Burton if (!check_mach->detect) 65eed0eabdSPaul Burton continue; 66eed0eabdSPaul Burton 67eed0eabdSPaul Burton if (!check_mach->detect()) 68eed0eabdSPaul Burton continue; 69eed0eabdSPaul Burton 70eed0eabdSPaul Burton mach = check_mach; 71eed0eabdSPaul Burton } 72eed0eabdSPaul Burton 73eed0eabdSPaul Burton /* 74eed0eabdSPaul Burton * If we don't recognise the machine then we can't continue, so 75eed0eabdSPaul Burton * die here. 76eed0eabdSPaul Burton */ 77eed0eabdSPaul Burton BUG_ON(!mach); 78eed0eabdSPaul Burton 79eed0eabdSPaul Burton /* Retrieve the machine's FDT */ 80eed0eabdSPaul Burton fdt = mach->fdt; 81eed0eabdSPaul Burton } 82eed0eabdSPaul Burton return (void *)fdt; 83eed0eabdSPaul Burton } 84eed0eabdSPaul Burton 85b47e9c62SPaul Burton #ifdef CONFIG_RELOCATABLE 86b47e9c62SPaul Burton 870063fdedSMarcin Nowakowski void __init plat_fdt_relocated(void *new_location) 880063fdedSMarcin Nowakowski { 890063fdedSMarcin Nowakowski /* 900063fdedSMarcin Nowakowski * reset fdt as the cached value would point to the location 910063fdedSMarcin Nowakowski * before relocations happened and update the location argument 920063fdedSMarcin Nowakowski * if it was passed using UHI 930063fdedSMarcin Nowakowski */ 940063fdedSMarcin Nowakowski fdt = NULL; 950063fdedSMarcin Nowakowski 960063fdedSMarcin Nowakowski if (fw_arg0 == -2) 970063fdedSMarcin Nowakowski fw_arg1 = (unsigned long)new_location; 980063fdedSMarcin Nowakowski } 990063fdedSMarcin Nowakowski 100b47e9c62SPaul Burton #endif /* CONFIG_RELOCATABLE */ 101b47e9c62SPaul Burton 102eed0eabdSPaul Burton void __init plat_mem_setup(void) 103eed0eabdSPaul Burton { 104eed0eabdSPaul Burton if (mach && mach->fixup_fdt) 105eed0eabdSPaul Burton fdt = mach->fixup_fdt(fdt, mach_match_data); 106eed0eabdSPaul Burton 10713a0ea28SPaul Cercueil fw_init_cmdline(); 108eed0eabdSPaul Burton __dt_setup_arch((void *)fdt); 109eed0eabdSPaul Burton } 110eed0eabdSPaul Burton 111eed0eabdSPaul Burton void __init device_tree_init(void) 112eed0eabdSPaul Burton { 113eed0eabdSPaul Burton int err; 114eed0eabdSPaul Burton 115eed0eabdSPaul Burton unflatten_and_copy_device_tree(); 116eed0eabdSPaul Burton mips_cpc_probe(); 117eed0eabdSPaul Burton 118eed0eabdSPaul Burton err = register_cps_smp_ops(); 119eed0eabdSPaul Burton if (err) 120eed0eabdSPaul Burton err = register_up_smp_ops(); 121eed0eabdSPaul Burton } 122eed0eabdSPaul Burton 123e889dfcaSPaul Burton int __init apply_mips_fdt_fixups(void *fdt_out, size_t fdt_out_size, 124e889dfcaSPaul Burton const void *fdt_in, 125e889dfcaSPaul Burton const struct mips_fdt_fixup *fixups) 126e889dfcaSPaul Burton { 127e889dfcaSPaul Burton int err; 128e889dfcaSPaul Burton 129e889dfcaSPaul Burton err = fdt_open_into(fdt_in, fdt_out, fdt_out_size); 130e889dfcaSPaul Burton if (err) { 131e889dfcaSPaul Burton pr_err("Failed to open FDT\n"); 132e889dfcaSPaul Burton return err; 133e889dfcaSPaul Burton } 134e889dfcaSPaul Burton 135e889dfcaSPaul Burton for (; fixups->apply; fixups++) { 136e889dfcaSPaul Burton err = fixups->apply(fdt_out); 137e889dfcaSPaul Burton if (err) { 138e889dfcaSPaul Burton pr_err("Failed to apply FDT fixup \"%s\"\n", 139e889dfcaSPaul Burton fixups->description); 140e889dfcaSPaul Burton return err; 141e889dfcaSPaul Burton } 142e889dfcaSPaul Burton } 143e889dfcaSPaul Burton 144e889dfcaSPaul Burton err = fdt_pack(fdt_out); 145e889dfcaSPaul Burton if (err) 146e889dfcaSPaul Burton pr_err("Failed to pack FDT\n"); 147e889dfcaSPaul Burton return err; 148e889dfcaSPaul Burton } 149e889dfcaSPaul Burton 150eed0eabdSPaul Burton void __init plat_time_init(void) 151eed0eabdSPaul Burton { 152eed0eabdSPaul Burton struct device_node *np; 153eed0eabdSPaul Burton struct clk *clk; 154eed0eabdSPaul Burton 155eed0eabdSPaul Burton of_clk_init(NULL); 156eed0eabdSPaul Burton 157eed0eabdSPaul Burton if (!cpu_has_counter) { 158eed0eabdSPaul Burton mips_hpt_frequency = 0; 159eed0eabdSPaul Burton } else if (mach && mach->measure_hpt_freq) { 160eed0eabdSPaul Burton mips_hpt_frequency = mach->measure_hpt_freq(); 161eed0eabdSPaul Burton } else { 162eed0eabdSPaul Burton np = of_get_cpu_node(0, NULL); 163eed0eabdSPaul Burton if (!np) { 164eed0eabdSPaul Burton pr_err("Failed to get CPU node\n"); 165eed0eabdSPaul Burton return; 166eed0eabdSPaul Burton } 167eed0eabdSPaul Burton 168eed0eabdSPaul Burton clk = of_clk_get(np, 0); 169eed0eabdSPaul Burton if (IS_ERR(clk)) { 170eed0eabdSPaul Burton pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk)); 171eed0eabdSPaul Burton return; 172eed0eabdSPaul Burton } 173eed0eabdSPaul Burton 174eed0eabdSPaul Burton mips_hpt_frequency = clk_get_rate(clk); 175eed0eabdSPaul Burton clk_put(clk); 176eed0eabdSPaul Burton 177eed0eabdSPaul Burton switch (boot_cpu_type()) { 178eed0eabdSPaul Burton case CPU_20KC: 179eed0eabdSPaul Burton case CPU_25KF: 180eed0eabdSPaul Burton /* The counter runs at the CPU clock rate */ 181eed0eabdSPaul Burton break; 182eed0eabdSPaul Burton default: 183eed0eabdSPaul Burton /* The counter runs at half the CPU clock rate */ 184eed0eabdSPaul Burton mips_hpt_frequency /= 2; 185eed0eabdSPaul Burton break; 186eed0eabdSPaul Burton } 187eed0eabdSPaul Burton } 188eed0eabdSPaul Burton 189ba5d08c0SDaniel Lezcano timer_probe(); 190eed0eabdSPaul Burton } 191eed0eabdSPaul Burton 192eed0eabdSPaul Burton void __init arch_init_irq(void) 193eed0eabdSPaul Burton { 194eed0eabdSPaul Burton struct device_node *intc_node; 195eed0eabdSPaul Burton 196eed0eabdSPaul Burton intc_node = of_find_compatible_node(NULL, NULL, 197eed0eabdSPaul Burton "mti,cpu-interrupt-controller"); 198eed0eabdSPaul Burton if (!cpu_has_veic && !intc_node) 199eed0eabdSPaul Burton mips_cpu_irq_init(); 20028ec2238SNicholas Mc Guire of_node_put(intc_node); 201eed0eabdSPaul Burton 202eed0eabdSPaul Burton irqchip_init(); 203eed0eabdSPaul Burton } 204