forked from Minki/linux
e46751bfd6
Update the VID type for certain VIA processors and remove the Itanium entries. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Jean Delvare <khali@linux-fr.org>
239 lines
7.4 KiB
C
239 lines
7.4 KiB
C
/*
|
|
hwmon-vid.c - VID/VRM/VRD voltage conversions
|
|
|
|
Copyright (c) 2004 Rudolf Marek <r.marek@assembler.cz>
|
|
|
|
Partly imported from i2c-vid.h of the lm_sensors project
|
|
Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
|
|
With assistance from Trent Piepho <xyzzy@speakeasy.org>
|
|
|
|
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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/hwmon-vid.h>
|
|
|
|
/*
|
|
Common code for decoding VID pins.
|
|
|
|
References:
|
|
|
|
For VRM 8.4 to 9.1, "VRM x.y DC-DC Converter Design Guidelines",
|
|
available at http://developer.intel.com/.
|
|
|
|
For VRD 10.0 and up, "VRD x.y Design Guide",
|
|
available at http://developer.intel.com/.
|
|
|
|
AMD Opteron processors don't follow the Intel specifications.
|
|
I'm going to "make up" 2.4 as the spec number for the Opterons.
|
|
No good reason just a mnemonic for the 24x Opteron processor
|
|
series.
|
|
|
|
Opteron VID encoding is:
|
|
00000 = 1.550 V
|
|
00001 = 1.525 V
|
|
. . . .
|
|
11110 = 0.800 V
|
|
11111 = 0.000 V (off)
|
|
|
|
The 17 specification is in fact Intel Mobile Voltage Positioning -
|
|
(IMVP-II). You can find more information in the datasheet of Max1718
|
|
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2452
|
|
|
|
The 13 specification corresponds to the Intel Pentium M series. There
|
|
doesn't seem to be any named specification for these. The conversion
|
|
tables are detailed directly in the various Pentium M datasheets:
|
|
http://www.intel.com/design/intarch/pentiumm/docs_pentiumm.htm
|
|
|
|
The 14 specification corresponds to Intel Core series. There
|
|
doesn't seem to be any named specification for these. The conversion
|
|
tables are detailed directly in the various Pentium Core datasheets:
|
|
http://www.intel.com/design/mobile/datashts/309221.htm
|
|
|
|
The 110 (VRM 11) specification corresponds to Intel Conroe based series.
|
|
http://www.intel.com/design/processor/applnots/313214.htm
|
|
*/
|
|
|
|
/* vrm is the VRM/VRD document version multiplied by 10.
|
|
val is the 4-bit or more VID code.
|
|
Returned value is in mV to avoid floating point in the kernel.
|
|
Some VID have some bits in uV scale, this is rounded to mV */
|
|
int vid_from_reg(int val, u8 vrm)
|
|
{
|
|
int vid;
|
|
|
|
switch(vrm) {
|
|
|
|
case 100: /* VRD 10.0 */
|
|
/* compute in uV, round to mV */
|
|
val &= 0x3f;
|
|
if((val & 0x1f) == 0x1f)
|
|
return 0;
|
|
if((val & 0x1f) <= 0x09 || val == 0x0a)
|
|
vid = 1087500 - (val & 0x1f) * 25000;
|
|
else
|
|
vid = 1862500 - (val & 0x1f) * 25000;
|
|
if(val & 0x20)
|
|
vid -= 12500;
|
|
return((vid + 500) / 1000);
|
|
|
|
case 110: /* Intel Conroe */
|
|
/* compute in uV, round to mV */
|
|
val &= 0xff;
|
|
if (val < 0x02 || val > 0xb2)
|
|
return 0;
|
|
return((1600000 - (val - 2) * 6250 + 500) / 1000);
|
|
case 24: /* Opteron processor */
|
|
val &= 0x1f;
|
|
return(val == 0x1f ? 0 : 1550 - val * 25);
|
|
|
|
case 91: /* VRM 9.1 */
|
|
case 90: /* VRM 9.0 */
|
|
val &= 0x1f;
|
|
return(val == 0x1f ? 0 :
|
|
1850 - val * 25);
|
|
|
|
case 85: /* VRM 8.5 */
|
|
val &= 0x1f;
|
|
return((val & 0x10 ? 25 : 0) +
|
|
((val & 0x0f) > 0x04 ? 2050 : 1250) -
|
|
((val & 0x0f) * 50));
|
|
|
|
case 84: /* VRM 8.4 */
|
|
val &= 0x0f;
|
|
/* fall through */
|
|
case 82: /* VRM 8.2 */
|
|
val &= 0x1f;
|
|
return(val == 0x1f ? 0 :
|
|
val & 0x10 ? 5100 - (val) * 100 :
|
|
2050 - (val) * 50);
|
|
case 17: /* Intel IMVP-II */
|
|
val &= 0x1f;
|
|
return(val & 0x10 ? 975 - (val & 0xF) * 25 :
|
|
1750 - val * 50);
|
|
case 13:
|
|
val &= 0x3f;
|
|
return(1708 - val * 16);
|
|
case 14: /* Intel Core */
|
|
/* compute in uV, round to mV */
|
|
val &= 0x7f;
|
|
return(val > 0x77 ? 0 : (1500000 - (val * 12500) + 500) / 1000);
|
|
default: /* report 0 for unknown */
|
|
printk(KERN_INFO "hwmon-vid: requested unknown VRM version\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
After this point is the code to automatically determine which
|
|
VRM/VRD specification should be used depending on the CPU.
|
|
*/
|
|
|
|
struct vrm_model {
|
|
u8 vendor;
|
|
u8 eff_family;
|
|
u8 eff_model;
|
|
u8 eff_stepping;
|
|
u8 vrm_type;
|
|
};
|
|
|
|
#define ANY 0xFF
|
|
|
|
#ifdef CONFIG_X86
|
|
|
|
/* the stepping parameter is highest acceptable stepping for current line */
|
|
|
|
static struct vrm_model vrm_models[] = {
|
|
{X86_VENDOR_AMD, 0x6, ANY, ANY, 90}, /* Athlon Duron etc */
|
|
{X86_VENDOR_AMD, 0xF, ANY, ANY, 24}, /* Athlon 64, Opteron and above VRM 24 */
|
|
{X86_VENDOR_INTEL, 0x6, 0x9, ANY, 13}, /* Pentium M (130 nm) */
|
|
{X86_VENDOR_INTEL, 0x6, 0xB, ANY, 85}, /* Tualatin */
|
|
{X86_VENDOR_INTEL, 0x6, 0xD, ANY, 13}, /* Pentium M (90 nm) */
|
|
{X86_VENDOR_INTEL, 0x6, 0xE, ANY, 14}, /* Intel Core (65 nm) */
|
|
{X86_VENDOR_INTEL, 0x6, 0xF, ANY, 110}, /* Intel Conroe */
|
|
{X86_VENDOR_INTEL, 0x6, ANY, ANY, 82}, /* any P6 */
|
|
{X86_VENDOR_INTEL, 0xF, 0x0, ANY, 90}, /* P4 */
|
|
{X86_VENDOR_INTEL, 0xF, 0x1, ANY, 90}, /* P4 Willamette */
|
|
{X86_VENDOR_INTEL, 0xF, 0x2, ANY, 90}, /* P4 Northwood */
|
|
{X86_VENDOR_INTEL, 0xF, ANY, ANY, 100}, /* Prescott and above assume VRD 10 */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0x7, ANY, 85}, /* Eden ESP/Ezra */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0x8, 0x7, 85}, /* Ezra T */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0x9, 0x7, 85}, /* Nemiah */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0x9, ANY, 17}, /* C3-M, Eden-N */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0xA, 0x7, 0}, /* No information */
|
|
{X86_VENDOR_CENTAUR, 0x6, 0xA, ANY, 13}, /* C7, Esther */
|
|
{X86_VENDOR_UNKNOWN, ANY, ANY, ANY, 0} /* stop here */
|
|
};
|
|
|
|
static u8 find_vrm(u8 eff_family, u8 eff_model, u8 eff_stepping, 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)) &&
|
|
(eff_stepping <= vrm_models[i].eff_stepping))
|
|
return vrm_models[i].vrm_type;
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 vid_which_vrm(void)
|
|
{
|
|
struct cpuinfo_x86 *c = cpu_data;
|
|
u32 eax;
|
|
u8 eff_family, eff_model, eff_stepping, vrm_ret;
|
|
|
|
if (c->x86 < 6) /* Any CPU with family lower than 6 */
|
|
return 0; /* doesn't have VID and/or CPUID */
|
|
|
|
eax = cpuid_eax(1);
|
|
eff_family = ((eax & 0x00000F00)>>8);
|
|
eff_model = ((eax & 0x000000F0)>>4);
|
|
eff_stepping = eax & 0xF;
|
|
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, eff_stepping, 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 the non-x86 world */
|
|
#else
|
|
u8 vid_which_vrm(void)
|
|
{
|
|
printk(KERN_INFO "hwmon-vid: Unknown VRM version of your CPU\n");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
EXPORT_SYMBOL(vid_from_reg);
|
|
EXPORT_SYMBOL(vid_which_vrm);
|
|
|
|
MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>");
|
|
|
|
MODULE_DESCRIPTION("hwmon-vid driver");
|
|
MODULE_LICENSE("GPL");
|