diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/hwmon-vid.c | 69 |
1 files changed, 42 insertions, 27 deletions
diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c index 312769ad4dab..e497274916ce 100644 --- a/drivers/hwmon/hwmon-vid.c +++ b/drivers/hwmon/hwmon-vid.c @@ -49,20 +49,22 @@ . . . . 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 + */ /* vrm is the VRM/VRD document version multiplied by 10. val is the 4-, 5- or 6-bit VID code. Returned value is in mV to avoid floating point in the kernel. */ -int vid_from_reg(int val, int vrm) +int vid_from_reg(int val, u8 vrm) { int vid; switch(vrm) { - case 0: - return 0; - case 100: /* VRD 10.0 */ if((val & 0x1f) == 0x1f) return 0; @@ -91,10 +93,16 @@ int vid_from_reg(int val, int vrm) case 84: /* VRM 8.4 */ val &= 0x0f; /* fall through */ - default: /* VRM 8.2 */ + case 82: /* VRM 8.2 */ return(val == 0x1f ? 0 : val & 0x10 ? 5100 - (val) * 100 : 2050 - (val) * 50); + case 17: /* Intel IMVP-II */ + return(val & 0x10 ? 975 - (val & 0xF) * 25 : + 1750 - val * 50); + default: /* report 0 for unknown */ + printk(KERN_INFO "hwmon-vid: requested unknown VRM version\n"); + return 0; } } @@ -108,30 +116,36 @@ struct vrm_model { u8 vendor; u8 eff_family; u8 eff_model; - int vrm_type; + 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, 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}, /* Tualatin */ - {X86_VENDOR_INTEL, 0x6, ANY, 82}, /* any P6 */ - {X86_VENDOR_INTEL, 0x7, ANY, 0}, /* Itanium */ - {X86_VENDOR_INTEL, 0xF, 0x0, 90}, /* P4 */ - {X86_VENDOR_INTEL, 0xF, 0x1, 90}, /* P4 Willamette */ - {X86_VENDOR_INTEL, 0xF, 0x2, 90}, /* P4 Northwood */ - {X86_VENDOR_INTEL, 0xF, 0x3, 100}, /* P4 Prescott */ - {X86_VENDOR_INTEL, 0xF, 0x4, 100}, /* P4 Prescott */ - {X86_VENDOR_INTEL, 0x10,ANY, 0}, /* Itanium 2 */ - {X86_VENDOR_UNKNOWN, ANY, ANY, 0} /* stop here */ + {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, 85}, /* 0.13um too */ + {X86_VENDOR_INTEL, 0x6, 0xB, ANY, 85}, /* Tualatin */ + {X86_VENDOR_INTEL, 0x6, ANY, ANY, 82}, /* any P6 */ + {X86_VENDOR_INTEL, 0x7, ANY, ANY, 0}, /* Itanium */ + {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_INTEL, 0x10, ANY, ANY, 0}, /* Itanium 2 */ + {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 */ + {X86_VENDOR_UNKNOWN, ANY, ANY, ANY, 0} /* stop here */ }; -static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor) +static u8 find_vrm(u8 eff_family, u8 eff_model, u8 eff_stepping, u8 vendor) { int i = 0; @@ -139,7 +153,8 @@ static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor) 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))) + (vrm_models[i].eff_model==ANY)) && + (eff_stepping <= vrm_models[i].eff_stepping)) return vrm_models[i].vrm_type; i++; } @@ -147,12 +162,11 @@ static int find_vrm(u8 eff_family, u8 eff_model, u8 vendor) return 0; } -int vid_which_vrm(void) +u8 vid_which_vrm(void) { struct cpuinfo_x86 *c = cpu_data; u32 eax; - u8 eff_family, eff_model; - int vrm_ret; + 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 */ @@ -160,20 +174,21 @@ int vid_which_vrm(void) 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,c->x86_vendor); + 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 something completely different for the non-x86 world */ +/* and now for something completely different for the non-x86 world */ #else -int vid_which_vrm(void) +u8 vid_which_vrm(void) { printk(KERN_INFO "hwmon-vid: Unknown VRM version of your CPU\n"); return 0; |