1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 5 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> 6 * Copyright (C) 2013 John Crispin <john@phrozen.org> 7 */ 8 9 #include <linux/io.h> 10 #include <linux/clk.h> 11 #include <linux/export.h> 12 #include <linux/init.h> 13 #include <linux/sizes.h> 14 #include <linux/of_fdt.h> 15 #include <linux/kernel.h> 16 #include <linux/memblock.h> 17 #include <linux/of_platform.h> 18 #include <linux/of_address.h> 19 20 #include <asm/reboot.h> 21 #include <asm/bootinfo.h> 22 #include <asm/addrspace.h> 23 #include <asm/prom.h> 24 #include <asm/mach-ralink/ralink_regs.h> 25 26 #include "common.h" 27 28 __iomem void *rt_sysc_membase; 29 __iomem void *rt_memc_membase; 30 EXPORT_SYMBOL_GPL(rt_sysc_membase); 31 32 static const struct of_device_id mtmips_memc_match[] = { 33 { .compatible = "mediatek,mt7621-memc" }, 34 { .compatible = "ralink,mt7620a-memc" }, 35 { .compatible = "ralink,rt2880-memc" }, 36 { .compatible = "ralink,rt3050-memc" }, 37 { .compatible = "ralink,rt3883-memc" }, 38 {} 39 }; 40 41 static const struct of_device_id mtmips_sysc_match[] = { 42 { .compatible = "mediatek,mt7621-sysc" }, 43 { .compatible = "ralink,mt7620-sysc" }, 44 { .compatible = "ralink,mt7628-sysc" }, 45 { .compatible = "ralink,mt7688-sysc" }, 46 { .compatible = "ralink,rt2880-sysc" }, 47 { .compatible = "ralink,rt3050-sysc" }, 48 { .compatible = "ralink,rt3052-sysc" }, 49 { .compatible = "ralink,rt3352-sysc" }, 50 { .compatible = "ralink,rt3883-sysc" }, 51 { .compatible = "ralink,rt5350-sysc" }, 52 {} 53 }; 54 55 static __iomem void * 56 mtmips_of_remap_node(const struct of_device_id *match, const char *type) 57 { 58 struct resource res; 59 struct device_node *np; 60 61 np = of_find_matching_node(NULL, match); 62 if (!np) 63 panic("Failed to find %s controller node", type); 64 65 if (of_address_to_resource(np, 0, &res)) 66 panic("Failed to get resource for %s node", np->name); 67 68 if (!request_mem_region(res.start, 69 resource_size(&res), 70 res.name)) 71 panic("Failed to request resources for %s node", np->name); 72 73 of_node_put(np); 74 75 return ioremap(res.start, resource_size(&res)); 76 } 77 78 void __init ralink_of_remap(void) 79 { 80 rt_sysc_membase = mtmips_of_remap_node(mtmips_sysc_match, "system"); 81 rt_memc_membase = mtmips_of_remap_node(mtmips_memc_match, "memory"); 82 83 if (!rt_sysc_membase || !rt_memc_membase) 84 panic("Failed to remap core resources"); 85 } 86 87 void __init plat_mem_setup(void) 88 { 89 void *dtb; 90 91 set_io_port_base(KSEG1); 92 93 /* 94 * Load the builtin devicetree. This causes the chosen node to be 95 * parsed resulting in our memory appearing. 96 */ 97 dtb = get_fdt(); 98 __dt_setup_arch(dtb); 99 100 if (early_init_dt_scan_memory()) 101 return; 102 103 if (soc_info.mem_detect) 104 soc_info.mem_detect(); 105 else if (soc_info.mem_size) 106 memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M); 107 else 108 detect_memory_region(soc_info.mem_base, 109 soc_info.mem_size_min * SZ_1M, 110 soc_info.mem_size_max * SZ_1M); 111 } 112 113 static int __init plat_of_setup(void) 114 { 115 __dt_register_buses(soc_info.compatible, "palmbus"); 116 117 return 0; 118 } 119 120 arch_initcall(plat_of_setup); 121