| /* |
| hwmon-vid.c - VID/VRM/VRD voltage conversions |
| |
| Copyright (c) 2004 Rudolf Marek <r.marek@sh.cvut.cz> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/hwmon-vid.h> |
| |
| struct vrm_model { |
| u8 vendor; |
| u8 eff_family; |
| u8 eff_model; |
| int vrm_type; |
| }; |
| |
| #define ANY 0xFF |
| |
| #ifdef CONFIG_X86 |
| |
| static struct vrm_model vrm_models[] = { |
| {X86_VENDOR_AMD, 0x6, ANY, 90}, /* Athlon Duron etc */ |
| {X86_VENDOR_AMD, 0xF, ANY, 24}, /* Athlon 64, Opteron */ |
| {X86_VENDOR_INTEL, 0x6, 0x9, 85}, /* 0.13um too */ |
| {X86_VENDOR_INTEL, 0x6, 0xB, 85}, /* 0xB Tualatin */ |
| {X86_VENDOR_INTEL, 0x6, ANY, 82}, /* any P6 */ |
| {X86_VENDOR_INTEL, 0x7, ANY, 0}, /* Itanium */ |
| {X86_VENDOR_INTEL, 0xF, 0x3, 100}, /* P4 Prescott */ |
| {X86_VENDOR_INTEL, 0xF, ANY, 90}, /* P4 before Prescott */ |
| {X86_VENDOR_INTEL, 0x10,ANY, 0}, /* Itanium 2 */ |
| {X86_VENDOR_UNKNOWN, ANY, ANY, 0} /* stop here */ |
| }; |
| |
| static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor) |
| { |
| int i = 0; |
| |
| while (vrm_models[i].vendor!=X86_VENDOR_UNKNOWN) { |
| if (vrm_models[i].vendor==vendor) |
| if ((vrm_models[i].eff_family==eff_family)&& \ |
| ((vrm_models[i].eff_model==eff_model)|| \ |
| (vrm_models[i].eff_model==ANY))) |
| return vrm_models[i].vrm_type; |
| i++; |
| } |
| |
| return 0; |
| } |
| |
| int vid_which_vrm(void) |
| { |
| struct cpuinfo_x86 *c = cpu_data; |
| u32 eax; |
| u8 eff_family, eff_model; |
| int vrm_ret; |
| |
| if (c->x86 < 6) return 0; /* any CPU with familly lower than 6 |
| dont have VID and/or CPUID */ |
| eax = cpuid_eax(1); |
| eff_family = ((eax & 0x00000F00)>>8); |
| eff_model = ((eax & 0x000000F0)>>4); |
| if (eff_family == 0xF) { /* use extended model & family */ |
| eff_family += ((eax & 0x00F00000)>>20); |
| eff_model += ((eax & 0x000F0000)>>16)<<4; |
| } |
| vrm_ret = find_vrm(eff_family,eff_model,c->x86_vendor); |
| if (vrm_ret == 0) |
| printk(KERN_INFO "hwmon-vid: Unknown VRM version of your" |
| " x86 CPU\n"); |
| return vrm_ret; |
| } |
| |
| /* and now for something completely different for Non-x86 world*/ |
| #else |
| int vid_which_vrm(void) |
| { |
| printk(KERN_INFO "hwmon-vid: Unknown VRM version of your CPU\n"); |
| return 0; |
| } |
| #endif |
| |
| EXPORT_SYMBOL(vid_which_vrm); |
| |
| MODULE_AUTHOR("Rudolf Marek <r.marek@sh.cvut.cz>"); |
| |
| MODULE_DESCRIPTION("hwmon-vid driver"); |
| MODULE_LICENSE("GPL"); |