diff options
Diffstat (limited to 'drivers/hwmon/hwmon-vid.c')
| -rw-r--r-- | drivers/hwmon/hwmon-vid.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c new file mode 100644 index 00000000000..ce475c93f83 --- /dev/null +++ b/drivers/hwmon/hwmon-vid.c @@ -0,0 +1,103 @@ +/* + 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"); |