1 /* 2 * Copyright (C) ST-Ericsson SA 2010 3 * 4 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson 5 * License terms: GNU General Public License (GPL) version 2 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/io.h> 11 12 #include <asm/cputype.h> 13 #include <asm/tlbflush.h> 14 #include <asm/cacheflush.h> 15 #include <asm/mach/map.h> 16 17 #include "setup.h" 18 19 #include "db8500-regs.h" 20 #include "id.h" 21 22 struct dbx500_asic_id dbx500_id; 23 ux500_read_asicid(phys_addr_t addr)24static unsigned int __init ux500_read_asicid(phys_addr_t addr) 25 { 26 phys_addr_t base = addr & ~0xfff; 27 struct map_desc desc = { 28 .virtual = (unsigned long)UX500_VIRT_ROM, 29 .pfn = __phys_to_pfn(base), 30 .length = SZ_16K, 31 .type = MT_DEVICE, 32 }; 33 34 iotable_init(&desc, 1); 35 36 /* As in devicemaps_init() */ 37 local_flush_tlb_all(); 38 flush_cache_all(); 39 40 return readl(UX500_VIRT_ROM + (addr & 0xfff)); 41 } 42 ux500_print_soc_info(unsigned int asicid)43static void ux500_print_soc_info(unsigned int asicid) 44 { 45 unsigned int rev = dbx500_revision(); 46 47 pr_info("DB%4x ", dbx500_partnumber()); 48 49 if (rev == 0x01) 50 pr_cont("Early Drop"); 51 else if (rev >= 0xA0) 52 pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf); 53 else 54 pr_cont("Unknown"); 55 56 pr_cont(" [%#010x]\n", asicid); 57 } 58 partnumber(unsigned int asicid)59static unsigned int partnumber(unsigned int asicid) 60 { 61 return (asicid >> 8) & 0xffff; 62 } 63 64 /* 65 * SOC MIDR ASICID ADDRESS ASICID VALUE 66 * DB8500ed 0x410fc090 0x9001FFF4 0x00850001 67 * DB8500v1 0x411fc091 0x9001FFF4 0x008500A0 68 * DB8500v1.1 0x411fc091 0x9001FFF4 0x008500A1 69 * DB8500v2 0x412fc091 0x9001DBF4 0x008500B0 70 * DB8520v2.2 0x412fc091 0x9001DBF4 0x008500B2 71 * DB5500v1 0x412fc091 0x9001FFF4 0x005500A0 72 * DB9540 0x413fc090 0xFFFFDBF4 0x009540xx 73 */ 74 ux500_map_io(void)75void __init ux500_map_io(void) 76 { 77 unsigned int cpuid = read_cpuid_id(); 78 unsigned int asicid = 0; 79 phys_addr_t addr = 0; 80 81 switch (cpuid) { 82 case 0x410fc090: /* DB8500ed */ 83 case 0x411fc091: /* DB8500v1 */ 84 addr = 0x9001FFF4; 85 break; 86 87 case 0x412fc091: /* DB8520 / DB8500v2 / DB5500v1 */ 88 asicid = ux500_read_asicid(0x9001DBF4); 89 if (partnumber(asicid) == 0x8500 || 90 partnumber(asicid) == 0x8520) 91 /* DB8500v2 */ 92 break; 93 94 /* DB5500v1 */ 95 addr = 0x9001FFF4; 96 break; 97 98 case 0x413fc090: /* DB9540 */ 99 addr = 0xFFFFDBF4; 100 break; 101 } 102 103 if (addr) 104 asicid = ux500_read_asicid(addr); 105 106 if (!asicid) { 107 pr_err("Unable to identify SoC\n"); 108 ux500_unknown_soc(); 109 } 110 111 dbx500_id.process = asicid >> 24; 112 dbx500_id.partnumber = partnumber(asicid); 113 dbx500_id.revision = asicid & 0xff; 114 115 ux500_print_soc_info(asicid); 116 } 117