diff options
| author | Jean Delvare <khali@linux-fr.org> | 2011-07-25 23:46:10 +0400 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2011-07-25 23:46:10 +0400 |
| commit | 0a88f4b55749239c4ec8b33da74ff924ccb87dad (patch) | |
| tree | f9c32b39b6942385d648ad1f7eb2d25ad6169b44 /drivers/hwmon | |
| parent | 0772a640793986d66fd3f89c3cc677bba5d5f94f (diff) | |
| download | linux-0a88f4b55749239c4ec8b33da74ff924ccb87dad.tar.xz | |
hwmon-vid: Add support for VIA family 6 model D CPU
The VIA family 6 model D CPU (C7-D, Eden 90 nm) can use two different
VID tables, we have to check the value of a MSR to decide which one to
use.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Tested-by: Jeff Rickman <jrickman@myamigos.us>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/hwmon-vid.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c index c8195a077da3..932da8a5aaf4 100644 --- a/drivers/hwmon/hwmon-vid.c +++ b/drivers/hwmon/hwmon-vid.c @@ -140,7 +140,11 @@ int vid_from_reg(int val, u8 vrm) return(val & 0x10 ? 975 - (val & 0xF) * 25 : 1750 - val * 50); case 13: + case 131: val &= 0x3f; + /* Exception for Eden ULV 500 MHz */ + if (vrm == 131 && val == 0x3f) + val++; return(1708 - val * 16); case 14: /* Intel Core */ /* compute in uV, round to mV */ @@ -205,11 +209,45 @@ static struct vrm_model vrm_models[] = { {X86_VENDOR_CENTAUR, 0x6, 0x9, 0x7, 85}, /* Nehemiah */ {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_CENTAUR, 0x6, 0xA, ANY, 13}, /* C7-M, C7, Eden (Esther) */ + {X86_VENDOR_CENTAUR, 0x6, 0xD, ANY, 134}, /* C7-D, C7-M, C7, Eden (Esther) */ {X86_VENDOR_UNKNOWN, ANY, ANY, ANY, 0} /* stop here */ }; +/* + * Special case for VIA model D: there are two different possible + * VID tables, so we have to figure out first, which one must be + * used. This resolves temporary drm value 134 to 14 (Intel Core + * 7-bit VID), 13 (Pentium M 6-bit VID) or 131 (Pentium M 6-bit VID + * + quirk for Eden ULV 500 MHz). + * Note: something similar might be needed for model A, I'm not sure. + */ +static u8 get_via_model_d_vrm(void) +{ + unsigned int vid, brand, dummy; + static const char *brands[4] = { + "C7-M", "C7", "Eden", "C7-D" + }; + + rdmsr(0x198, dummy, vid); + vid &= 0xff; + + rdmsr(0x1154, brand, dummy); + brand = ((brand >> 4) ^ (brand >> 2)) & 0x03; + + if (vid > 0x3f) { + pr_info("Using %d-bit VID table for VIA %s CPU\n", + 7, brands[brand]); + return 14; + } else { + pr_info("Using %d-bit VID table for VIA %s CPU\n", + 6, brands[brand]); + /* Enable quirk for Eden */ + return brand == 2 ? 131 : 13; + } +} + static u8 find_vrm(u8 eff_family, u8 eff_model, u8 eff_stepping, u8 vendor) { int i = 0; @@ -247,6 +285,8 @@ u8 vid_which_vrm(void) eff_model += ((eax & 0x000F0000)>>16)<<4; } vrm_ret = find_vrm(eff_family, eff_model, eff_stepping, c->x86_vendor); + if (vrm_ret == 134) + vrm_ret = get_via_model_d_vrm(); if (vrm_ret == 0) pr_info("Unknown VRM version of your x86 CPU\n"); return vrm_ret; |