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 #include <asm/prom.h> 18 19 #include <lantiq.h> 20 21 #include "prom.h" 22 #include "clk.h" 23 24 /* access to the ebu needs to be locked between different drivers */ 25 DEFINE_SPINLOCK(ebu_lock); 26 EXPORT_SYMBOL_GPL(ebu_lock); 27 28 /* 29 * this struct is filled by the soc specific detection code and holds 30 * information about the specific soc type, revision and name 31 */ 32 static struct ltq_soc_info soc_info; 33 34 const char *get_system_type(void) 35 { 36 return soc_info.sys_type; 37 } 38 39 void prom_free_prom_memory(void) 40 { 41 } 42 43 static void __init prom_init_cmdline(void) 44 { 45 int argc = fw_arg0; 46 char **argv = (char **) KSEG1ADDR(fw_arg1); 47 int i; 48 49 arcs_cmdline[0] = '\0'; 50 51 for (i = 0; i < argc; i++) { 52 char *p = (char *) KSEG1ADDR(argv[i]); 53 54 if (CPHYSADDR(p) && *p) { 55 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); 56 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 57 } 58 } 59 } 60 61 void __init plat_mem_setup(void) 62 { 63 ioport_resource.start = IOPORT_RESOURCE_START; 64 ioport_resource.end = IOPORT_RESOURCE_END; 65 iomem_resource.start = IOMEM_RESOURCE_START; 66 iomem_resource.end = IOMEM_RESOURCE_END; 67 68 set_io_port_base((unsigned long) KSEG1); 69 70 /* 71 * Load the builtin devicetree. This causes the chosen node to be 72 * parsed resulting in our memory appearing 73 */ 74 __dt_setup_arch(__dtb_start); 75 } 76 77 void __init device_tree_init(void) 78 { 79 unflatten_and_copy_device_tree(); 80 } 81 82 void __init prom_init(void) 83 { 84 /* call the soc specific detetcion code and get it to fill soc_info */ 85 ltq_soc_detect(&soc_info); 86 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", 87 soc_info.name, soc_info.rev_type); 88 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; 89 pr_info("SoC: %s\n", soc_info.sys_type); 90 prom_init_cmdline(); 91 92 #if defined(CONFIG_MIPS_MT_SMP) 93 if (register_vsmp_smp_ops()) 94 panic("failed to register_vsmp_smp_ops()"); 95 #endif 96 } 97 98 int __init plat_of_setup(void) 99 { 100 static struct of_device_id of_ids[3]; 101 102 if (!of_have_populated_dt()) 103 panic("device tree not present"); 104 105 strlcpy(of_ids[0].compatible, soc_info.compatible, 106 sizeof(of_ids[0].compatible)); 107 strncpy(of_ids[1].compatible, "simple-bus", 108 sizeof(of_ids[1].compatible)); 109 return of_platform_populate(NULL, of_ids, NULL, NULL); 110 } 111 112 arch_initcall(plat_of_setup); 113