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,mt7620a-sysc" }, 44 { .compatible = "ralink,rt2880-sysc" }, 45 { .compatible = "ralink,rt3050-sysc" }, 46 { .compatible = "ralink,rt3883-sysc" }, 47 {} 48 }; 49 50 static __iomem void * 51 mtmips_of_remap_node(const struct of_device_id *match, const char *type) 52 { 53 struct resource res; 54 struct device_node *np; 55 56 np = of_find_matching_node(NULL, match); 57 if (!np) 58 panic("Failed to find %s controller node", type); 59 60 if (of_address_to_resource(np, 0, &res)) 61 panic("Failed to get resource for %s node", np->name); 62 63 if (!request_mem_region(res.start, 64 resource_size(&res), 65 res.name)) 66 panic("Failed to request resources for %s node", np->name); 67 68 of_node_put(np); 69 70 return ioremap(res.start, resource_size(&res)); 71 } 72 73 void __init ralink_of_remap(void) 74 { 75 rt_sysc_membase = mtmips_of_remap_node(mtmips_sysc_match, "system"); 76 rt_memc_membase = mtmips_of_remap_node(mtmips_memc_match, "memory"); 77 78 if (!rt_sysc_membase || !rt_memc_membase) 79 panic("Failed to remap core resources"); 80 } 81 82 void __init plat_mem_setup(void) 83 { 84 void *dtb; 85 86 set_io_port_base(KSEG1); 87 88 /* 89 * Load the builtin devicetree. This causes the chosen node to be 90 * parsed resulting in our memory appearing. 91 */ 92 dtb = get_fdt(); 93 __dt_setup_arch(dtb); 94 95 if (early_init_dt_scan_memory()) 96 return; 97 98 if (soc_info.mem_detect) 99 soc_info.mem_detect(); 100 else if (soc_info.mem_size) 101 memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M); 102 else 103 detect_memory_region(soc_info.mem_base, 104 soc_info.mem_size_min * SZ_1M, 105 soc_info.mem_size_max * SZ_1M); 106 } 107 108 static int __init plat_of_setup(void) 109 { 110 __dt_register_buses(soc_info.compatible, "palmbus"); 111 112 return 0; 113 } 114 115 arch_initcall(plat_of_setup); 116