1 /* 2 * This program is free software; you can redistribute it and/or modify it 3 * under the terms of the GNU General Public License version 2 as published 4 * by the Free Software Foundation. 5 * 6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org> 7 */ 8 9 #include <linux/export.h> 10 #include <linux/clk.h> 11 #include <linux/bootmem.h> 12 #include <linux/of_platform.h> 13 #include <linux/of_fdt.h> 14 15 #include <asm/bootinfo.h> 16 #include <asm/time.h> 17 18 #include <lantiq.h> 19 20 #include "prom.h" 21 #include "clk.h" 22 23 /* access to the ebu needs to be locked between different drivers */ 24 DEFINE_SPINLOCK(ebu_lock); 25 EXPORT_SYMBOL_GPL(ebu_lock); 26 27 /* 28 * this struct is filled by the soc specific detection code and holds 29 * information about the specific soc type, revision and name 30 */ 31 static struct ltq_soc_info soc_info; 32 33 const char *get_system_type(void) 34 { 35 return soc_info.sys_type; 36 } 37 38 void prom_free_prom_memory(void) 39 { 40 } 41 42 static void __init prom_init_cmdline(void) 43 { 44 int argc = fw_arg0; 45 char **argv = (char **) KSEG1ADDR(fw_arg1); 46 int i; 47 48 arcs_cmdline[0] = '\0'; 49 50 for (i = 0; i < argc; i++) { 51 char *p = (char *) KSEG1ADDR(argv[i]); 52 53 if (CPHYSADDR(p) && *p) { 54 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); 55 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 56 } 57 } 58 } 59 60 void __init plat_mem_setup(void) 61 { 62 ioport_resource.start = IOPORT_RESOURCE_START; 63 ioport_resource.end = IOPORT_RESOURCE_END; 64 iomem_resource.start = IOMEM_RESOURCE_START; 65 iomem_resource.end = IOMEM_RESOURCE_END; 66 67 set_io_port_base((unsigned long) KSEG1); 68 69 /* 70 * Load the builtin devicetree. This causes the chosen node to be 71 * parsed resulting in our memory appearing 72 */ 73 __dt_setup_arch(&__dtb_start); 74 } 75 76 void __init device_tree_init(void) 77 { 78 unsigned long base, size; 79 80 if (!initial_boot_params) 81 return; 82 83 base = virt_to_phys((void *)initial_boot_params); 84 size = be32_to_cpu(initial_boot_params->totalsize); 85 86 /* Before we do anything, lets reserve the dt blob */ 87 reserve_bootmem(base, size, BOOTMEM_DEFAULT); 88 89 unflatten_device_tree(); 90 91 /* free the space reserved for the dt blob */ 92 free_bootmem(base, size); 93 } 94 95 void __init prom_init(void) 96 { 97 /* call the soc specific detetcion code and get it to fill soc_info */ 98 ltq_soc_detect(&soc_info); 99 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", 100 soc_info.name, soc_info.rev_type); 101 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; 102 pr_info("SoC: %s\n", soc_info.sys_type); 103 prom_init_cmdline(); 104 105 #if defined(CONFIG_MIPS_MT_SMP) 106 if (register_vsmp_smp_ops()) 107 panic("failed to register_vsmp_smp_ops()"); 108 #endif 109 } 110 111 int __init plat_of_setup(void) 112 { 113 static struct of_device_id of_ids[3]; 114 115 if (!of_have_populated_dt()) 116 panic("device tree not present"); 117 118 strncpy(of_ids[0].compatible, soc_info.compatible, 119 sizeof(of_ids[0].compatible)); 120 strncpy(of_ids[1].compatible, "simple-bus", 121 sizeof(of_ids[1].compatible)); 122 return of_platform_bus_probe(NULL, of_ids, NULL); 123 } 124 125 arch_initcall(plat_of_setup); 126