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 int ltq_soc_type(void) 40 { 41 return soc_info.type; 42 } 43 44 void prom_free_prom_memory(void) 45 { 46 } 47 48 static void __init prom_init_cmdline(void) 49 { 50 int argc = fw_arg0; 51 char **argv = (char **) KSEG1ADDR(fw_arg1); 52 int i; 53 54 arcs_cmdline[0] = '\0'; 55 56 for (i = 0; i < argc; i++) { 57 char *p = (char *) KSEG1ADDR(argv[i]); 58 59 if (CPHYSADDR(p) && *p) { 60 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); 61 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 62 } 63 } 64 } 65 66 void __init plat_mem_setup(void) 67 { 68 ioport_resource.start = IOPORT_RESOURCE_START; 69 ioport_resource.end = IOPORT_RESOURCE_END; 70 iomem_resource.start = IOMEM_RESOURCE_START; 71 iomem_resource.end = IOMEM_RESOURCE_END; 72 73 set_io_port_base((unsigned long) KSEG1); 74 75 /* 76 * Load the builtin devicetree. This causes the chosen node to be 77 * parsed resulting in our memory appearing 78 */ 79 __dt_setup_arch(__dtb_start); 80 81 strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); 82 } 83 84 void __init device_tree_init(void) 85 { 86 unflatten_and_copy_device_tree(); 87 } 88 89 void __init prom_init(void) 90 { 91 /* call the soc specific detetcion code and get it to fill soc_info */ 92 ltq_soc_detect(&soc_info); 93 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", 94 soc_info.name, soc_info.rev_type); 95 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; 96 pr_info("SoC: %s\n", soc_info.sys_type); 97 prom_init_cmdline(); 98 99 #if defined(CONFIG_MIPS_MT_SMP) 100 if (register_vsmp_smp_ops()) 101 panic("failed to register_vsmp_smp_ops()"); 102 #endif 103 } 104 105 int __init plat_of_setup(void) 106 { 107 return __dt_register_buses(soc_info.compatible, "simple-bus"); 108 } 109 110 arch_initcall(plat_of_setup); 111