| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | i2c-sensor-vid.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | monitoring |
| 4 | |
| 5 | Copyright (c) 2004 Rudolf Marek <r.marek@sh.cvut.cz> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/config.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/kernel.h> |
| 25 | |
| 26 | struct vrm_model { |
| 27 | u8 vendor; |
| 28 | u8 eff_family; |
| 29 | u8 eff_model; |
| 30 | int vrm_type; |
| 31 | }; |
| 32 | |
| 33 | #define ANY 0xFF |
| 34 | |
| 35 | #ifdef CONFIG_X86 |
| 36 | |
| 37 | static struct vrm_model vrm_models[] = { |
| 38 | {X86_VENDOR_AMD, 0x6, ANY, 90}, /* Athlon Duron etc */ |
| 39 | {X86_VENDOR_AMD, 0xF, ANY, 24}, /* Athlon 64, Opteron */ |
| 40 | {X86_VENDOR_INTEL, 0x6, 0x9, 85}, /* 0.13um too */ |
| 41 | {X86_VENDOR_INTEL, 0x6, 0xB, 85}, /* 0xB Tualatin */ |
| 42 | {X86_VENDOR_INTEL, 0x6, ANY, 82}, /* any P6 */ |
| 43 | {X86_VENDOR_INTEL, 0x7, ANY, 0}, /* Itanium */ |
| 44 | {X86_VENDOR_INTEL, 0xF, 0x3, 100}, /* P4 Prescott */ |
| 45 | {X86_VENDOR_INTEL, 0xF, ANY, 90}, /* P4 before Prescott */ |
| 46 | {X86_VENDOR_INTEL, 0x10,ANY, 0}, /* Itanium 2 */ |
| 47 | {X86_VENDOR_UNKNOWN, ANY, ANY, 0} /* stop here */ |
| 48 | }; |
| 49 | |
| 50 | static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor) |
| 51 | { |
| 52 | int i = 0; |
| 53 | |
| 54 | while (vrm_models[i].vendor!=X86_VENDOR_UNKNOWN) { |
| 55 | if (vrm_models[i].vendor==vendor) |
| 56 | if ((vrm_models[i].eff_family==eff_family)&& \ |
| 57 | ((vrm_models[i].eff_model==eff_model)|| \ |
| 58 | (vrm_models[i].eff_model==ANY))) |
| 59 | return vrm_models[i].vrm_type; |
| 60 | i++; |
| 61 | } |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | int i2c_which_vrm(void) |
| 67 | { |
| 68 | struct cpuinfo_x86 *c = cpu_data; |
| 69 | u32 eax; |
| 70 | u8 eff_family, eff_model; |
| 71 | int vrm_ret; |
| 72 | |
| 73 | if (c->x86 < 6) return 0; /* any CPU with familly lower than 6 |
| 74 | dont have VID and/or CPUID */ |
| 75 | eax = cpuid_eax(1); |
| 76 | eff_family = ((eax & 0x00000F00)>>8); |
| 77 | eff_model = ((eax & 0x000000F0)>>4); |
| 78 | if (eff_family == 0xF) { /* use extended model & family */ |
| 79 | eff_family += ((eax & 0x00F00000)>>20); |
| 80 | eff_model += ((eax & 0x000F0000)>>16)<<4; |
| 81 | } |
| 82 | vrm_ret = find_vrm(eff_family,eff_model,c->x86_vendor); |
| 83 | if (vrm_ret == 0) |
| 84 | printk(KERN_INFO "i2c-sensor.o: Unknown VRM version of your" |
| 85 | " x86 CPU\n"); |
| 86 | return vrm_ret; |
| 87 | } |
| 88 | |
| 89 | /* and now for something completely different for Non-x86 world*/ |
| 90 | #else |
| 91 | int i2c_which_vrm(void) |
| 92 | { |
| 93 | printk(KERN_INFO "i2c-sensor.o: Unknown VRM version of your CPU\n"); |
| 94 | return 0; |
| 95 | } |
| 96 | #endif |
| 97 | |
| 98 | EXPORT_SYMBOL(i2c_which_vrm); |