projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| abf12d71 RV |
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 <mach/hardware.h> | |
| 18 | #include <mach/setup.h> | |
| 19 | ||
| 20 | struct dbx500_asic_id dbx500_id; | |
| 21 | ||
| 22 | static unsigned int ux500_read_asicid(phys_addr_t addr) | |
| 23 | { | |
| 24 | phys_addr_t base = addr & ~0xfff; | |
| 25 | struct map_desc desc = { | |
| 26 | .virtual = IO_ADDRESS(base), | |
| 27 | .pfn = __phys_to_pfn(base), | |
| 28 | .length = SZ_16K, | |
| 29 | .type = MT_DEVICE, | |
| 30 | }; | |
| 31 | ||
| 32 | iotable_init(&desc, 1); | |
| 33 | ||
| 34 | /* As in devicemaps_init() */ | |
| 35 | local_flush_tlb_all(); | |
| 36 | flush_cache_all(); | |
| 37 | ||
| 38 | return readl(__io_address(addr)); | |
| 39 | } | |
| 40 | ||
| 41 | static void ux500_print_soc_info(unsigned int asicid) | |
| 42 | { | |
| 43 | unsigned int rev = dbx500_revision(); | |
| 44 | ||
| 45 | pr_info("DB%4x ", dbx500_partnumber()); | |
| 46 | ||
| 47 | if (rev == 0x01) | |
| 48 | pr_cont("Early Drop"); | |
| 49 | else if (rev >= 0xA0) | |
| 50 | pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf); | |
| 51 | else | |
| 52 | pr_cont("Unknown"); | |
| 53 | ||
| 54 | pr_cont(" [%#010x]\n", asicid); | |
| 55 | } | |
| 56 | ||
| 57 | static unsigned int partnumber(unsigned int asicid) | |
| 58 | { | |
| 59 | return (asicid >> 8) & 0xffff; | |
| 60 | } | |
| 61 | ||
| 62 | /* | |
| 63 | * SOC MIDR ASICID ADDRESS ASICID VALUE | |
| 64 | * DB8500ed 0x410fc090 0x9001FFF4 0x00850001 | |
| 65 | * DB8500v1 0x411fc091 0x9001FFF4 0x008500A0 | |
| 66 | * DB8500v1.1 0x411fc091 0x9001FFF4 0x008500A1 | |
| 67 | * DB8500v2 0x412fc091 0x9001DBF4 0x008500B0 | |
| 41c34ae4 | 68 | * DB8520v2.2 0x412fc091 0x9001DBF4 0x008500B2 |
| abf12d71 RV |
69 | * DB5500v1 0x412fc091 0x9001FFF4 0x005500A0 |
| 70 | */ | |
| 71 | ||
| 72 | void __init ux500_map_io(void) | |
| 73 | { | |
| 74 | unsigned int cpuid = read_cpuid_id(); | |
| 75 | unsigned int asicid = 0; | |
| 76 | phys_addr_t addr = 0; | |
| 77 | ||
| 78 | switch (cpuid) { | |
| 79 | case 0x410fc090: /* DB8500ed */ | |
| 80 | case 0x411fc091: /* DB8500v1 */ | |
| 81 | addr = 0x9001FFF4; | |
| 82 | break; | |
| 83 | ||
| 41c34ae4 | 84 | case 0x412fc091: /* DB8520 / DB8500v2 / DB5500v1 */ |
| abf12d71 | 85 | asicid = ux500_read_asicid(0x9001DBF4); |
| 41c34ae4 RV |
86 | if (partnumber(asicid) == 0x8500 || |
| 87 | partnumber(asicid) == 0x8520) | |
| abf12d71 RV |
88 | /* DB8500v2 */ |
| 89 | break; | |
| 90 | ||
| 91 | /* DB5500v1 */ | |
| 92 | addr = 0x9001FFF4; | |
| 93 | break; | |
| 94 | } | |
| 95 | ||
| 96 | if (addr) | |
| 97 | asicid = ux500_read_asicid(addr); | |
| 98 | ||
| 99 | if (!asicid) { | |
| 100 | pr_err("Unable to identify SoC\n"); | |
| 101 | ux500_unknown_soc(); | |
| 102 | } | |
| 103 | ||
| 104 | dbx500_id.process = asicid >> 24; | |
| 105 | dbx500_id.partnumber = partnumber(asicid); | |
| 106 | dbx500_id.revision = asicid & 0xff; | |
| 107 | ||
| 108 | ux500_print_soc_info(asicid); | |
| 109 | } |