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Commit | Line | Data |
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1da177e4 | 1 | /* |
303760b4 | 2 | hwmon-vid.c - VID/VRM/VRD voltage conversions |
1da177e4 LT |
3 | |
4 | Copyright (c) 2004 Rudolf Marek <r.marek@sh.cvut.cz> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
303760b4 | 24 | #include <linux/hwmon-vid.h> |
1da177e4 LT |
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 */ | |
da97a5a3 | 41 | {X86_VENDOR_INTEL, 0x6, 0xB, 85}, /* Tualatin */ |
1da177e4 LT |
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 */ | |
da97a5a3 | 48 | }; |
1da177e4 LT |
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) | |
da97a5a3 JD |
56 | if ((vrm_models[i].eff_family==eff_family) |
57 | && ((vrm_models[i].eff_model==eff_model) || | |
58 | (vrm_models[i].eff_model==ANY))) | |
1da177e4 LT |
59 | return vrm_models[i].vrm_type; |
60 | i++; | |
61 | } | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
303760b4 | 66 | int vid_which_vrm(void) |
1da177e4 LT |
67 | { |
68 | struct cpuinfo_x86 *c = cpu_data; | |
69 | u32 eax; | |
70 | u8 eff_family, eff_model; | |
71 | int vrm_ret; | |
72 | ||
da97a5a3 JD |
73 | if (c->x86 < 6) /* Any CPU with family lower than 6 */ |
74 | return 0; /* doesn't have VID and/or CPUID */ | |
75 | ||
1da177e4 LT |
76 | eax = cpuid_eax(1); |
77 | eff_family = ((eax & 0x00000F00)>>8); | |
78 | eff_model = ((eax & 0x000000F0)>>4); | |
79 | if (eff_family == 0xF) { /* use extended model & family */ | |
80 | eff_family += ((eax & 0x00F00000)>>20); | |
81 | eff_model += ((eax & 0x000F0000)>>16)<<4; | |
82 | } | |
83 | vrm_ret = find_vrm(eff_family,eff_model,c->x86_vendor); | |
84 | if (vrm_ret == 0) | |
da97a5a3 JD |
85 | printk(KERN_INFO "hwmon-vid: Unknown VRM version of your " |
86 | "x86 CPU\n"); | |
1da177e4 LT |
87 | return vrm_ret; |
88 | } | |
89 | ||
da97a5a3 | 90 | /* and now something completely different for the non-x86 world */ |
1da177e4 | 91 | #else |
303760b4 | 92 | int vid_which_vrm(void) |
1da177e4 | 93 | { |
303760b4 | 94 | printk(KERN_INFO "hwmon-vid: Unknown VRM version of your CPU\n"); |
1da177e4 LT |
95 | return 0; |
96 | } | |
97 | #endif | |
98 | ||
303760b4 | 99 | EXPORT_SYMBOL(vid_which_vrm); |
96478ef3 JD |
100 | |
101 | MODULE_AUTHOR("Rudolf Marek <r.marek@sh.cvut.cz>"); | |
102 | ||
303760b4 | 103 | MODULE_DESCRIPTION("hwmon-vid driver"); |
96478ef3 | 104 | MODULE_LICENSE("GPL"); |