| 1 | /* |
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| 2 | via686a.c - Part of lm_sensors, Linux kernel modules |
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| 3 | for hardware monitoring |
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| 4 | |
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| 5 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
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| 6 | Kyösti Mälkki <kmalkki@cc.hut.fi>, |
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| 7 | Mark Studebaker <mdsxyz123@yahoo.com>, |
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| 8 | and Bob Dougherty <bobd@stanford.edu> |
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| 9 | (Some conversion-factor data were contributed by Jonathan Teh Soon Yew |
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| 10 | <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.) |
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| 11 | |
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| 12 | This program is free software; you can redistribute it and/or modify |
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| 13 | it under the terms of the GNU General Public License as published by |
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| 14 | the Free Software Foundation; either version 2 of the License, or |
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| 15 | (at your option) any later version. |
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| 16 | |
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| 17 | This program is distributed in the hope that it will be useful, |
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| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 20 | GNU General Public License for more details. |
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| 21 | |
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| 22 | You should have received a copy of the GNU General Public License |
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| 23 | along with this program; if not, write to the Free Software |
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| 24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 25 | */ |
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| 26 | |
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| 27 | /* |
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| 28 | Supports the Via VT82C686A, VT82C686B, and VT8231 south bridges. |
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| 29 | Reports all as a 686A. |
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| 30 | 8231-specific features not yet supported. |
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| 31 | See doc/chips/via686a for details. |
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| 32 | Warning - only supports a single device. |
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| 33 | */ |
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| 34 | #include <linux/version.h> |
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| 35 | #include <linux/module.h> |
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| 36 | #include <linux/slab.h> |
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| 37 | #include <linux/proc_fs.h> |
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| 38 | #include <linux/ioport.h> |
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| 39 | #include <linux/sysctl.h> |
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| 40 | #include <linux/pci.h> |
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| 41 | #include <asm/errno.h> |
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| 42 | #include <asm/io.h> |
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| 43 | #include <linux/types.h> |
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| 44 | #include <linux/delay.h> |
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| 45 | #include <linux/i2c.h> |
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| 46 | #include "version.h" |
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| 47 | #include "sensors.h" |
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| 48 | #include <linux/init.h> |
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| 49 | |
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| 50 | #ifdef MODULE_LICENSE |
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| 51 | MODULE_LICENSE("GPL"); |
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| 52 | #endif |
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| 53 | |
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| 54 | #ifndef PCI_DEVICE_ID_VIA_82C686_4 |
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| 55 | #define PCI_DEVICE_ID_VIA_82C686_4 0x3057 |
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| 56 | #endif |
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| 57 | |
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| 58 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,2,18)) || \ |
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| 59 | (LINUX_VERSION_CODE == KERNEL_VERSION(2,3,0)) |
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| 60 | #define init_MUTEX(s) do { *(s) = MUTEX; } while(0) |
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| 61 | #endif |
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| 62 | |
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| 63 | #ifndef THIS_MODULE |
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| 64 | #define THIS_MODULE NULL |
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| 65 | #endif |
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| 66 | |
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| 67 | /* If force_addr is set to anything different from 0, we forcibly enable |
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| 68 | the device at the given address. */ |
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| 69 | static int force_addr = 0; |
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| 70 | MODULE_PARM(force_addr, "i"); |
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| 71 | MODULE_PARM_DESC(force_addr, |
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| 72 | "Initialize the base address of the sensors"); |
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| 73 | |
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| 74 | /* Addresses to scan. |
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| 75 | Note that we can't determine the ISA address until we have initialized |
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| 76 | our module */ |
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| 77 | static unsigned short normal_i2c[] = { SENSORS_I2C_END }; |
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| 78 | static unsigned short normal_i2c_range[] = { SENSORS_I2C_END }; |
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| 79 | static unsigned int normal_isa[] = { 0x0000, SENSORS_ISA_END }; |
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| 80 | static unsigned int normal_isa_range[] = { SENSORS_ISA_END }; |
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| 81 | |
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| 82 | /* Insmod parameters */ |
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| 83 | SENSORS_INSMOD_1(via686a); |
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| 84 | |
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| 85 | /* |
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| 86 | The Via 686a southbridge has a LM78-like chip integrated on the same IC. |
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| 87 | This driver is a customized copy of lm78.c |
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| 88 | */ |
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| 89 | |
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| 90 | /* Many VIA686A constants specified below */ |
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| 91 | |
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| 92 | /* Length of ISA address segment */ |
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| 93 | #define VIA686A_EXTENT 0x80 |
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| 94 | #define VIA686A_BASE_REG 0x70 |
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| 95 | #define VIA686A_ENABLE_REG 0x74 |
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| 96 | |
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| 97 | /* The VIA686A registers */ |
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| 98 | /* ins numbered 0-4 */ |
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| 99 | #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) |
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| 100 | #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) |
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| 101 | #define VIA686A_REG_IN(nr) (0x22 + (nr)) |
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| 102 | |
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| 103 | /* fans numbered 1-2 */ |
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| 104 | #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) |
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| 105 | #define VIA686A_REG_FAN(nr) (0x28 + (nr)) |
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| 106 | |
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| 107 | // the following values are as speced by VIA: |
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| 108 | static const u8 regtemp[] = { 0x20, 0x21, 0x1f }; |
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| 109 | static const u8 regover[] = { 0x39, 0x3d, 0x1d }; |
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| 110 | static const u8 reghyst[] = { 0x3a, 0x3e, 0x1e }; |
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| 111 | |
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| 112 | /* temps numbered 1-3 */ |
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| 113 | #define VIA686A_REG_TEMP(nr) (regtemp[(nr) - 1]) |
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| 114 | #define VIA686A_REG_TEMP_OVER(nr) (regover[(nr) - 1]) |
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| 115 | #define VIA686A_REG_TEMP_HYST(nr) (reghyst[(nr) - 1]) |
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| 116 | #define VIA686A_REG_TEMP_LOW1 0x4b // bits 7-6 |
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| 117 | #define VIA686A_REG_TEMP_LOW23 0x49 // 2 = bits 5-4, 3 = bits 7-6 |
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| 118 | |
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| 119 | #define VIA686A_REG_ALARM1 0x41 |
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| 120 | #define VIA686A_REG_ALARM2 0x42 |
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| 121 | #define VIA686A_REG_FANDIV 0x47 |
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| 122 | #define VIA686A_REG_CONFIG 0x40 |
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| 123 | // The following register sets temp interrupt mode (bits 1-0 for temp1, |
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| 124 | // 3-2 for temp2, 5-4 for temp3). Modes are: |
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| 125 | // 00 interrupt stays as long as value is out-of-range |
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| 126 | // 01 interrupt is cleared once register is read (default) |
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| 127 | // 10 comparator mode- like 00, but ignores hysteresis |
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| 128 | // 11 same as 00 |
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| 129 | #define VIA686A_REG_TEMP_MODE 0x4b |
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| 130 | // We'll just assume that you want to set all 3 simulataneously: |
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| 131 | #define VIA686A_TEMP_MODE_MASK 0x3F |
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| 132 | #define VIA686A_TEMP_MODE_CONTINUOUS (0x00) |
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| 133 | |
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| 134 | /* Conversions. Rounding and limit checking is only done on the TO_REG |
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| 135 | variants. */ |
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| 136 | |
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| 137 | /********* VOLTAGE CONVERSIONS (Bob Dougherty) ********/ |
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| 138 | // From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): |
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| 139 | // voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp |
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| 140 | // voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V |
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| 141 | // voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V |
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| 142 | // voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V |
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| 143 | // voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V |
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| 144 | // in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; |
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| 145 | // That is: |
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| 146 | // volts = (25*regVal+133)*factor |
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| 147 | // regVal = (volts/factor-133)/25 |
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| 148 | // (These conversions were contributed by Jonathan Teh Soon Yew |
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| 149 | // <j.teh@iname.com>) |
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| 150 | // |
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| 151 | // These get us close, but they don't completely agree with what my BIOS |
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| 152 | // says- they are all a bit low. But, it all we have to go on... |
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| 153 | extern inline u8 IN_TO_REG(long val, int inNum) |
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| 154 | { |
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| 155 | // to avoid floating point, we multiply everything by 100. |
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| 156 | // val is guaranteed to be positive, so we can achieve the effect of |
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| 157 | // rounding by (...*10+5)/10. Note that the *10 is hidden in the |
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| 158 | // /250 (which should really be /2500). |
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| 159 | // At the end, we need to /100 because we *100 everything and we need |
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| 160 | // to /10 because of the rounding thing, so we /1000. |
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| 161 | if (inNum <= 1) |
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| 162 | return (u8) |
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| 163 | SENSORS_LIMIT(((val * 210240 - 13300) / 250 + 5) / 1000, |
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| 164 | 0, 255); |
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| 165 | else if (inNum == 2) |
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| 166 | return (u8) |
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| 167 | SENSORS_LIMIT(((val * 157370 - 13300) / 250 + 5) / 1000, |
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| 168 | 0, 255); |
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| 169 | else if (inNum == 3) |
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| 170 | return (u8) |
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| 171 | SENSORS_LIMIT(((val * 101080 - 13300) / 250 + 5) / 1000, |
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| 172 | 0, 255); |
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| 173 | else |
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| 174 | return (u8) SENSORS_LIMIT(((val * 41714 - 13300) / 250 + 5) |
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| 175 | / 1000, 0, 255); |
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| 176 | } |
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| 177 | |
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| 178 | extern inline long IN_FROM_REG(u8 val, int inNum) |
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| 179 | { |
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| 180 | // to avoid floating point, we multiply everything by 100. |
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| 181 | // val is guaranteed to be positive, so we can achieve the effect of |
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| 182 | // rounding by adding 0.5. Or, to avoid fp math, we do (...*10+5)/10. |
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| 183 | // We need to scale with *100 anyway, so no need to /100 at the end. |
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| 184 | if (inNum <= 1) |
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| 185 | return (long) (((250000 * val + 13300) / 210240 * 10 + 5) /10); |
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| 186 | else if (inNum == 2) |
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| 187 | return (long) (((250000 * val + 13300) / 157370 * 10 + 5) /10); |
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| 188 | else if (inNum == 3) |
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| 189 | return (long) (((250000 * val + 13300) / 101080 * 10 + 5) /10); |
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| 190 | else |
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| 191 | return (long) (((250000 * val + 13300) / 41714 * 10 + 5) /10); |
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| 192 | } |
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| 193 | |
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| 194 | /********* FAN RPM CONVERSIONS ********/ |
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| 195 | // Higher register values = slower fans (the fan's strobe gates a counter). |
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| 196 | // But this chip saturates back at 0, not at 255 like all the other chips. |
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| 197 | // So, 0 means 0 RPM |
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| 198 | extern inline u8 FAN_TO_REG(long rpm, int div) |
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| 199 | { |
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| 200 | if (rpm == 0) |
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| 201 | return 0; |
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| 202 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); |
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| 203 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); |
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| 204 | } |
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| 205 | |
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| 206 | #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) |
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| 207 | |
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| 208 | /******** TEMP CONVERSIONS (Bob Dougherty) *********/ |
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| 209 | // linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) |
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| 210 | // if(temp<169) |
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| 211 | // return double(temp)*0.427-32.08; |
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| 212 | // else if(temp>=169 && temp<=202) |
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| 213 | // return double(temp)*0.582-58.16; |
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| 214 | // else |
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| 215 | // return double(temp)*0.924-127.33; |
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| 216 | // |
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| 217 | // A fifth-order polynomial fits the unofficial data (provided by Alex van |
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| 218 | // Kaam <darkside@chello.nl>) a bit better. It also give more reasonable |
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| 219 | // numbers on my machine (ie. they agree with what my BIOS tells me). |
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| 220 | // Here's the fifth-order fit to the 8-bit data: |
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| 221 | // temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - |
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| 222 | // 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. |
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| 223 | // |
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| 224 | // (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for |
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| 225 | // finding my typos in this formula!) |
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| 226 | // |
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| 227 | // Alas, none of the elegant function-fit solutions will work because we |
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| 228 | // aren't allowed to use floating point in the kernel and doing it with |
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| 229 | // integers doesn't rpovide enough precision. So we'll do boring old |
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| 230 | // look-up table stuff. The unofficial data (see below) have effectively |
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| 231 | // 7-bit resolution (they are rounded to the nearest degree). I'm assuming |
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| 232 | // that the transfer function of the device is monotonic and smooth, so a |
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| 233 | // smooth function fit to the data will allow us to get better precision. |
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| 234 | // I used the 5th-order poly fit described above and solved for |
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| 235 | // VIA register values 0-255. I *10 before rounding, so we get tenth-degree |
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| 236 | // precision. (I could have done all 1024 values for our 10-bit readings, |
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| 237 | // but the function is very linear in the useful range (0-80 deg C), so |
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| 238 | // we'll just use linear interpolation for 10-bit readings.) So, tempLUT |
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| 239 | // is the temp at via register values 0-255: |
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| 240 | static const long tempLUT[] = |
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| 241 | { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, |
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| 242 | -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, |
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| 243 | -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, |
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| 244 | -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, |
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| 245 | -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, |
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| 246 | -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, |
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| 247 | -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, |
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| 248 | 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, |
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| 249 | 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, |
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| 250 | 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, |
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| 251 | 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, |
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| 252 | 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, |
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| 253 | 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, |
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| 254 | 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, |
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| 255 | 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, |
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| 256 | 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, |
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| 257 | 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, |
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| 258 | 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, |
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| 259 | 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, |
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| 260 | 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, |
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| 261 | 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, |
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| 262 | 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 |
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| 263 | }; |
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| 264 | |
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| 265 | /* the original LUT values from Alex van Kaam <darkside@chello.nl> |
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| 266 | (for via register values 12-240): |
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| 267 | {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, |
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| 268 | -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, |
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| 269 | -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, |
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| 270 | -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12, |
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| 271 | 12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22, |
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| 272 | 22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33, |
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| 273 | 33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45, |
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| 274 | 45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60, |
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| 275 | 61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84, |
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| 276 | 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; |
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| 277 | */ |
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| 278 | |
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| 279 | // Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed |
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| 280 | // an extra term for a good fit to these inverse data!) and then |
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| 281 | // solving for each temp value from -50 to 110 (the useable range for |
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| 282 | // this chip). Here's the fit: |
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| 283 | // viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 |
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| 284 | // - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) |
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| 285 | // Note that n=161: |
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| 286 | static const u8 viaLUT[] = |
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| 287 | { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, |
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| 288 | 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, |
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| 289 | 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, |
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| 290 | 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, |
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| 291 | 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, |
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| 292 | 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, |
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| 293 | 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, |
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| 294 | 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, |
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| 295 | 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, |
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| 296 | 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, |
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| 297 | 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, |
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| 298 | 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, |
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| 299 | 239, 240 |
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| 300 | }; |
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| 301 | |
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| 302 | /* Converting temps to (8-bit) hyst and over registers */ |
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| 303 | // No interpolation here. Just check the limits and go. |
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| 304 | // The +5 effectively rounds off properly and the +50 is because |
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| 305 | // the temps start at -50 |
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| 306 | extern inline u8 TEMP_TO_REG(long val) |
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| 307 | { |
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| 308 | return (u8) |
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| 309 | SENSORS_LIMIT(viaLUT[((val <= -500) ? 0 : (val >= 1100) ? 160 : |
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| 310 | ((val + 5) / 10 + 50))], 0, 255); |
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| 311 | } |
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| 312 | |
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| 313 | /* for 8-bit temperature hyst and over registers */ |
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| 314 | // The temp values are already *10, so we don't need to do that. |
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| 315 | // But we _will_ round these off to the nearest degree with (...*10+5)/10 |
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| 316 | #define TEMP_FROM_REG(val) ((tempLUT[(val)]*10+5)/10) |
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| 317 | |
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| 318 | /* for 10-bit temperature readings */ |
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| 319 | // You might _think_ this is too long to inline, but's it's really only |
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| 320 | // called once... |
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| 321 | extern inline long TEMP_FROM_REG10(u16 val) |
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| 322 | { |
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| 323 | // the temp values are already *10, so we don't need to do that. |
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| 324 | long temp; |
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| 325 | u16 eightBits = val >> 2; |
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| 326 | u16 twoBits = val & 3; |
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| 327 | |
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| 328 | // handle the extremes first (they won't interpolate well! ;-) |
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| 329 | if (val == 0) |
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| 330 | return (long) tempLUT[0]; |
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| 331 | if (val == 1023) |
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| 332 | return (long) tempLUT[255]; |
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| 333 | |
|---|
| 334 | if (twoBits == 0) |
|---|
| 335 | return (long) tempLUT[eightBits]; |
|---|
| 336 | else { |
|---|
| 337 | // do some interpolation by multipying the lower and upper |
|---|
| 338 | // bounds by 25, 50 or 75, then /100. |
|---|
| 339 | temp = ((25 * (4 - twoBits)) * tempLUT[eightBits] |
|---|
| 340 | + (25 * twoBits) * tempLUT[eightBits + 1]); |
|---|
| 341 | // increase the magnitude by 50 to achieve rounding. |
|---|
| 342 | if (temp > 0) |
|---|
| 343 | temp += 50; |
|---|
| 344 | else |
|---|
| 345 | temp -= 50; |
|---|
| 346 | return (temp / 100); |
|---|
| 347 | } |
|---|
| 348 | } |
|---|
| 349 | |
|---|
| 350 | #define ALARMS_FROM_REG(val) (val) |
|---|
| 351 | |
|---|
| 352 | #define DIV_FROM_REG(val) (1 << (val)) |
|---|
| 353 | #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) |
|---|
| 354 | |
|---|
| 355 | /* Initial limits */ |
|---|
| 356 | #define VIA686A_INIT_IN_0 200 |
|---|
| 357 | #define VIA686A_INIT_IN_1 250 |
|---|
| 358 | #define VIA686A_INIT_IN_2 330 |
|---|
| 359 | #define VIA686A_INIT_IN_3 500 |
|---|
| 360 | #define VIA686A_INIT_IN_4 1200 |
|---|
| 361 | |
|---|
| 362 | #define VIA686A_INIT_IN_PERCENTAGE 10 |
|---|
| 363 | |
|---|
| 364 | #define VIA686A_INIT_IN_MIN_0 (VIA686A_INIT_IN_0 - VIA686A_INIT_IN_0 \ |
|---|
| 365 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 366 | #define VIA686A_INIT_IN_MAX_0 (VIA686A_INIT_IN_0 + VIA686A_INIT_IN_0 \ |
|---|
| 367 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 368 | #define VIA686A_INIT_IN_MIN_1 (VIA686A_INIT_IN_1 - VIA686A_INIT_IN_1 \ |
|---|
| 369 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 370 | #define VIA686A_INIT_IN_MAX_1 (VIA686A_INIT_IN_1 + VIA686A_INIT_IN_1 \ |
|---|
| 371 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 372 | #define VIA686A_INIT_IN_MIN_2 (VIA686A_INIT_IN_2 - VIA686A_INIT_IN_2 \ |
|---|
| 373 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 374 | #define VIA686A_INIT_IN_MAX_2 (VIA686A_INIT_IN_2 + VIA686A_INIT_IN_2 \ |
|---|
| 375 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 376 | #define VIA686A_INIT_IN_MIN_3 (VIA686A_INIT_IN_3 - VIA686A_INIT_IN_3 \ |
|---|
| 377 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 378 | #define VIA686A_INIT_IN_MAX_3 (VIA686A_INIT_IN_3 + VIA686A_INIT_IN_3 \ |
|---|
| 379 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 380 | #define VIA686A_INIT_IN_MIN_4 (VIA686A_INIT_IN_4 - VIA686A_INIT_IN_4 \ |
|---|
| 381 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 382 | #define VIA686A_INIT_IN_MAX_4 (VIA686A_INIT_IN_4 + VIA686A_INIT_IN_4 \ |
|---|
| 383 | * VIA686A_INIT_IN_PERCENTAGE / 100) |
|---|
| 384 | |
|---|
| 385 | #define VIA686A_INIT_FAN_MIN 3000 |
|---|
| 386 | |
|---|
| 387 | #define VIA686A_INIT_TEMP_OVER 600 |
|---|
| 388 | #define VIA686A_INIT_TEMP_HYST 500 |
|---|
| 389 | |
|---|
| 390 | #ifdef MODULE |
|---|
| 391 | extern int init_module(void); |
|---|
| 392 | extern int cleanup_module(void); |
|---|
| 393 | #endif /* MODULE */ |
|---|
| 394 | |
|---|
| 395 | /* For the VIA686A, we need to keep some data in memory. That |
|---|
| 396 | data is pointed to by via686a_list[NR]->data. The structure itself is |
|---|
| 397 | dynamically allocated, at the same time when a new via686a client is |
|---|
| 398 | allocated. */ |
|---|
| 399 | struct via686a_data { |
|---|
| 400 | struct semaphore lock; |
|---|
| 401 | int sysctl_id; |
|---|
| 402 | |
|---|
| 403 | struct semaphore update_lock; |
|---|
| 404 | char valid; /* !=0 if following fields are valid */ |
|---|
| 405 | unsigned long last_updated; /* In jiffies */ |
|---|
| 406 | |
|---|
| 407 | u8 in[5]; /* Register value */ |
|---|
| 408 | u8 in_max[5]; /* Register value */ |
|---|
| 409 | u8 in_min[5]; /* Register value */ |
|---|
| 410 | u8 fan[2]; /* Register value */ |
|---|
| 411 | u8 fan_min[2]; /* Register value */ |
|---|
| 412 | u16 temp[3]; /* Register value 10 bit */ |
|---|
| 413 | u8 temp_over[3]; /* Register value */ |
|---|
| 414 | u8 temp_hyst[3]; /* Register value */ |
|---|
| 415 | u8 fan_div[2]; /* Register encoding, shifted right */ |
|---|
| 416 | u16 alarms; /* Register encoding, combined */ |
|---|
| 417 | }; |
|---|
| 418 | |
|---|
| 419 | static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ |
|---|
| 420 | |
|---|
| 421 | #ifdef MODULE |
|---|
| 422 | static |
|---|
| 423 | #else |
|---|
| 424 | extern |
|---|
| 425 | #endif |
|---|
| 426 | int __init sensors_via686a_init(void); |
|---|
| 427 | static int __init via686a_cleanup(void); |
|---|
| 428 | |
|---|
| 429 | static int via686a_attach_adapter(struct i2c_adapter *adapter); |
|---|
| 430 | static int via686a_detect(struct i2c_adapter *adapter, int address, |
|---|
| 431 | unsigned short flags, int kind); |
|---|
| 432 | static int via686a_detach_client(struct i2c_client *client); |
|---|
| 433 | static int via686a_command(struct i2c_client *client, unsigned int cmd, |
|---|
| 434 | void *arg); |
|---|
| 435 | static void via686a_inc_use(struct i2c_client *client); |
|---|
| 436 | static void via686a_dec_use(struct i2c_client *client); |
|---|
| 437 | |
|---|
| 438 | static int via686a_read_value(struct i2c_client *client, u8 register); |
|---|
| 439 | static void via686a_write_value(struct i2c_client *client, u8 register, |
|---|
| 440 | u8 value); |
|---|
| 441 | static void via686a_update_client(struct i2c_client *client); |
|---|
| 442 | static void via686a_init_client(struct i2c_client *client); |
|---|
| 443 | static int via686a_find(int *address); |
|---|
| 444 | |
|---|
| 445 | |
|---|
| 446 | static void via686a_in(struct i2c_client *client, int operation, |
|---|
| 447 | int ctl_name, int *nrels_mag, long *results); |
|---|
| 448 | static void via686a_fan(struct i2c_client *client, int operation, |
|---|
| 449 | int ctl_name, int *nrels_mag, long *results); |
|---|
| 450 | static void via686a_temp(struct i2c_client *client, int operation, |
|---|
| 451 | int ctl_name, int *nrels_mag, long *results); |
|---|
| 452 | static void via686a_alarms(struct i2c_client *client, int operation, |
|---|
| 453 | int ctl_name, int *nrels_mag, long *results); |
|---|
| 454 | static void via686a_fan_div(struct i2c_client *client, int operation, |
|---|
| 455 | int ctl_name, int *nrels_mag, long *results); |
|---|
| 456 | |
|---|
| 457 | static int via686a_id = 0; |
|---|
| 458 | |
|---|
| 459 | /* The driver. I choose to use type i2c_driver, as at is identical to both |
|---|
| 460 | smbus_driver and isa_driver, and clients could be of either kind */ |
|---|
| 461 | static struct i2c_driver via686a_driver = { |
|---|
| 462 | /* name */ "VIA 686A", |
|---|
| 463 | /* id */ I2C_DRIVERID_VIA686A, |
|---|
| 464 | /* flags */ I2C_DF_NOTIFY, |
|---|
| 465 | /* attach_adapter */ &via686a_attach_adapter, |
|---|
| 466 | /* detach_client */ &via686a_detach_client, |
|---|
| 467 | /* command */ &via686a_command, |
|---|
| 468 | /* inc_use */ &via686a_inc_use, |
|---|
| 469 | /* dec_use */ &via686a_dec_use |
|---|
| 470 | }; |
|---|
| 471 | |
|---|
| 472 | /* Used by via686a_init/cleanup */ |
|---|
| 473 | static int __initdata via686a_initialized = 0; |
|---|
| 474 | |
|---|
| 475 | /* The /proc/sys entries */ |
|---|
| 476 | /* These files are created for each detected VIA686A. This is just a template; |
|---|
| 477 | though at first sight, you might think we could use a statically |
|---|
| 478 | allocated list, we need some way to get back to the parent - which |
|---|
| 479 | is done through one of the 'extra' fields which are initialized |
|---|
| 480 | when a new copy is allocated. */ |
|---|
| 481 | static ctl_table via686a_dir_table_template[] = { |
|---|
| 482 | {VIA686A_SYSCTL_IN0, "in0", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 483 | &i2c_sysctl_real, NULL, &via686a_in}, |
|---|
| 484 | {VIA686A_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 485 | &i2c_sysctl_real, NULL, &via686a_in}, |
|---|
| 486 | {VIA686A_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 487 | &i2c_sysctl_real, NULL, &via686a_in}, |
|---|
| 488 | {VIA686A_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 489 | &i2c_sysctl_real, NULL, &via686a_in}, |
|---|
| 490 | {VIA686A_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 491 | &i2c_sysctl_real, NULL, &via686a_in}, |
|---|
| 492 | {VIA686A_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 493 | &i2c_sysctl_real, NULL, &via686a_fan}, |
|---|
| 494 | {VIA686A_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 495 | &i2c_sysctl_real, NULL, &via686a_fan}, |
|---|
| 496 | {VIA686A_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real, |
|---|
| 497 | &i2c_sysctl_real, NULL, &via686a_temp}, |
|---|
| 498 | {VIA686A_SYSCTL_TEMP2, "temp2", NULL, 0, 0644, NULL, |
|---|
| 499 | &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_temp}, |
|---|
| 500 | {VIA686A_SYSCTL_TEMP3, "temp3", NULL, 0, 0644, NULL, |
|---|
| 501 | &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_temp}, |
|---|
| 502 | {VIA686A_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, |
|---|
| 503 | &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_fan_div}, |
|---|
| 504 | {VIA686A_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, |
|---|
| 505 | &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_alarms}, |
|---|
| 506 | {0} |
|---|
| 507 | }; |
|---|
| 508 | |
|---|
| 509 | static inline int via686a_read_value(struct i2c_client *client, u8 reg) |
|---|
| 510 | { |
|---|
| 511 | return (inb_p(client->addr + reg)); |
|---|
| 512 | } |
|---|
| 513 | |
|---|
| 514 | static inline void via686a_write_value(struct i2c_client *client, u8 reg, |
|---|
| 515 | u8 value) |
|---|
| 516 | { |
|---|
| 517 | outb_p(value, client->addr + reg); |
|---|
| 518 | } |
|---|
| 519 | |
|---|
| 520 | /* This is called when the module is loaded */ |
|---|
| 521 | int via686a_attach_adapter(struct i2c_adapter *adapter) |
|---|
| 522 | { |
|---|
| 523 | return i2c_detect(adapter, &addr_data, via686a_detect); |
|---|
| 524 | } |
|---|
| 525 | |
|---|
| 526 | /* Locate chip and get correct base address */ |
|---|
| 527 | int via686a_find(int *address) |
|---|
| 528 | { |
|---|
| 529 | u16 val; |
|---|
| 530 | |
|---|
| 531 | if (!pci_present()) |
|---|
| 532 | return -ENODEV; |
|---|
| 533 | |
|---|
| 534 | if (!(s_bridge = pci_find_device(PCI_VENDOR_ID_VIA, |
|---|
| 535 | PCI_DEVICE_ID_VIA_82C686_4, |
|---|
| 536 | NULL))) |
|---|
| 537 | if (!(s_bridge = pci_find_device(PCI_VENDOR_ID_VIA, |
|---|
| 538 | 0x8235, |
|---|
| 539 | NULL))) return -ENODEV; |
|---|
| 540 | |
|---|
| 541 | if (PCIBIOS_SUCCESSFUL != |
|---|
| 542 | pci_read_config_word(s_bridge, VIA686A_BASE_REG, &val)) |
|---|
| 543 | return -ENODEV; |
|---|
| 544 | *address = val & ~(VIA686A_EXTENT - 1); |
|---|
| 545 | if (*address == 0 && force_addr == 0) { |
|---|
| 546 | printk("via686a.o: base address not set - upgrade BIOS or use force_addr=0xaddr\n"); |
|---|
| 547 | return -ENODEV; |
|---|
| 548 | } |
|---|
| 549 | if (force_addr) |
|---|
| 550 | *address = force_addr; /* so detect will get called */ |
|---|
| 551 | |
|---|
| 552 | return 0; |
|---|
| 553 | } |
|---|
| 554 | |
|---|
| 555 | int via686a_detect(struct i2c_adapter *adapter, int address, |
|---|
| 556 | unsigned short flags, int kind) |
|---|
| 557 | { |
|---|
| 558 | int i; |
|---|
| 559 | struct i2c_client *new_client; |
|---|
| 560 | struct via686a_data *data; |
|---|
| 561 | int err = 0; |
|---|
| 562 | const char *type_name = "via686a"; |
|---|
| 563 | u16 val; |
|---|
| 564 | |
|---|
| 565 | /* Make sure we are probing the ISA bus!! */ |
|---|
| 566 | if (!i2c_is_isa_adapter(adapter)) { |
|---|
| 567 | printk |
|---|
| 568 | ("via686a.o: via686a_detect called for an I2C bus adapter?!?\n"); |
|---|
| 569 | return 0; |
|---|
| 570 | } |
|---|
| 571 | |
|---|
| 572 | /* 8231 requires multiple of 256, we enforce that on 686 as well */ |
|---|
| 573 | if(force_addr) |
|---|
| 574 | address = force_addr & 0xFF00; |
|---|
| 575 | if (check_region(address, VIA686A_EXTENT)) { |
|---|
| 576 | printk("via686a.o: region 0x%x already in use!\n", |
|---|
| 577 | address); |
|---|
| 578 | return -ENODEV; |
|---|
| 579 | } |
|---|
| 580 | |
|---|
| 581 | if(force_addr) { |
|---|
| 582 | printk("via686a.o: forcing ISA address 0x%04X\n", address); |
|---|
| 583 | if (PCIBIOS_SUCCESSFUL != |
|---|
| 584 | pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) |
|---|
| 585 | return -ENODEV; |
|---|
| 586 | } |
|---|
| 587 | if (PCIBIOS_SUCCESSFUL != |
|---|
| 588 | pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) |
|---|
| 589 | return -ENODEV; |
|---|
| 590 | if (!(val & 0x0001)) { |
|---|
| 591 | printk("via686a.o: enabling sensors\n"); |
|---|
| 592 | if (PCIBIOS_SUCCESSFUL != |
|---|
| 593 | pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, |
|---|
| 594 | val | 0x0001)) |
|---|
| 595 | return -ENODEV; |
|---|
| 596 | } |
|---|
| 597 | |
|---|
| 598 | if (!(new_client = kmalloc(sizeof(struct i2c_client) + |
|---|
| 599 | sizeof(struct via686a_data), |
|---|
| 600 | GFP_KERNEL))) { |
|---|
| 601 | err = -ENOMEM; |
|---|
| 602 | goto ERROR0; |
|---|
| 603 | } |
|---|
| 604 | |
|---|
| 605 | data = (struct via686a_data *) (new_client + 1); |
|---|
| 606 | new_client->addr = address; |
|---|
| 607 | init_MUTEX(&data->lock); |
|---|
| 608 | new_client->data = data; |
|---|
| 609 | new_client->adapter = adapter; |
|---|
| 610 | new_client->driver = &via686a_driver; |
|---|
| 611 | new_client->flags = 0; |
|---|
| 612 | |
|---|
| 613 | /* Reserve the ISA region */ |
|---|
| 614 | request_region(address, VIA686A_EXTENT, "via686a-sensors"); |
|---|
| 615 | |
|---|
| 616 | /* Fill in the remaining client fields and put into the global list */ |
|---|
| 617 | strcpy(new_client->name, "Via 686A Integrated Sensors"); |
|---|
| 618 | |
|---|
| 619 | new_client->id = via686a_id++; |
|---|
| 620 | data->valid = 0; |
|---|
| 621 | init_MUTEX(&data->update_lock); |
|---|
| 622 | |
|---|
| 623 | /* Tell the I2C layer a new client has arrived */ |
|---|
| 624 | if ((err = i2c_attach_client(new_client))) |
|---|
| 625 | goto ERROR3; |
|---|
| 626 | |
|---|
| 627 | /* Register a new directory entry with module sensors */ |
|---|
| 628 | if ((i = i2c_register_entry((struct i2c_client *) new_client, |
|---|
| 629 | type_name, |
|---|
| 630 | via686a_dir_table_template, |
|---|
| 631 | THIS_MODULE)) < 0) { |
|---|
| 632 | err = i; |
|---|
| 633 | goto ERROR4; |
|---|
| 634 | } |
|---|
| 635 | data->sysctl_id = i; |
|---|
| 636 | |
|---|
| 637 | /* Initialize the VIA686A chip */ |
|---|
| 638 | via686a_init_client(new_client); |
|---|
| 639 | return 0; |
|---|
| 640 | |
|---|
| 641 | ERROR4: |
|---|
| 642 | i2c_detach_client(new_client); |
|---|
| 643 | ERROR3: |
|---|
| 644 | release_region(address, VIA686A_EXTENT); |
|---|
| 645 | kfree(new_client); |
|---|
| 646 | ERROR0: |
|---|
| 647 | return err; |
|---|
| 648 | } |
|---|
| 649 | |
|---|
| 650 | int via686a_detach_client(struct i2c_client *client) |
|---|
| 651 | { |
|---|
| 652 | int err; |
|---|
| 653 | |
|---|
| 654 | i2c_deregister_entry(((struct via686a_data *) |
|---|
| 655 | (client->data))->sysctl_id); |
|---|
| 656 | |
|---|
| 657 | if ((err = i2c_detach_client(client))) { |
|---|
| 658 | printk |
|---|
| 659 | ("via686a.o: Client deregistration failed, client not detached.\n"); |
|---|
| 660 | return err; |
|---|
| 661 | } |
|---|
| 662 | |
|---|
| 663 | release_region(client->addr, VIA686A_EXTENT); |
|---|
| 664 | kfree(client); |
|---|
| 665 | |
|---|
| 666 | return 0; |
|---|
| 667 | } |
|---|
| 668 | |
|---|
| 669 | /* No commands defined yet */ |
|---|
| 670 | int via686a_command(struct i2c_client *client, unsigned int cmd, void *arg) |
|---|
| 671 | { |
|---|
| 672 | return 0; |
|---|
| 673 | } |
|---|
| 674 | |
|---|
| 675 | void via686a_inc_use(struct i2c_client *client) |
|---|
| 676 | { |
|---|
| 677 | MOD_INC_USE_COUNT; |
|---|
| 678 | } |
|---|
| 679 | |
|---|
| 680 | void via686a_dec_use(struct i2c_client *client) |
|---|
| 681 | { |
|---|
| 682 | MOD_DEC_USE_COUNT; |
|---|
| 683 | } |
|---|
| 684 | |
|---|
| 685 | /* Called when we have found a new VIA686A. Set limits, etc. */ |
|---|
| 686 | void via686a_init_client(struct i2c_client *client) |
|---|
| 687 | { |
|---|
| 688 | int i; |
|---|
| 689 | |
|---|
| 690 | /* Reset the device */ |
|---|
| 691 | via686a_write_value(client, VIA686A_REG_CONFIG, 0x80); |
|---|
| 692 | |
|---|
| 693 | /* Have to wait for reset to complete or else the following |
|---|
| 694 | initializations won't work reliably. The delay was arrived at |
|---|
| 695 | empirically, the datasheet doesn't tell you. |
|---|
| 696 | Waiting for the reset bit to clear doesn't work, it |
|---|
| 697 | clears in about 2-4 udelays and that isn't nearly enough. */ |
|---|
| 698 | udelay(50); |
|---|
| 699 | |
|---|
| 700 | via686a_write_value(client, VIA686A_REG_IN_MIN(0), |
|---|
| 701 | IN_TO_REG(VIA686A_INIT_IN_MIN_0, 0)); |
|---|
| 702 | via686a_write_value(client, VIA686A_REG_IN_MAX(0), |
|---|
| 703 | IN_TO_REG(VIA686A_INIT_IN_MAX_0, 0)); |
|---|
| 704 | via686a_write_value(client, VIA686A_REG_IN_MIN(1), |
|---|
| 705 | IN_TO_REG(VIA686A_INIT_IN_MIN_1, 1)); |
|---|
| 706 | via686a_write_value(client, VIA686A_REG_IN_MAX(1), |
|---|
| 707 | IN_TO_REG(VIA686A_INIT_IN_MAX_1, 1)); |
|---|
| 708 | via686a_write_value(client, VIA686A_REG_IN_MIN(2), |
|---|
| 709 | IN_TO_REG(VIA686A_INIT_IN_MIN_2, 2)); |
|---|
| 710 | via686a_write_value(client, VIA686A_REG_IN_MAX(2), |
|---|
| 711 | IN_TO_REG(VIA686A_INIT_IN_MAX_2, 2)); |
|---|
| 712 | via686a_write_value(client, VIA686A_REG_IN_MIN(3), |
|---|
| 713 | IN_TO_REG(VIA686A_INIT_IN_MIN_3, 3)); |
|---|
| 714 | via686a_write_value(client, VIA686A_REG_IN_MAX(3), |
|---|
| 715 | IN_TO_REG(VIA686A_INIT_IN_MAX_3, 3)); |
|---|
| 716 | via686a_write_value(client, VIA686A_REG_IN_MIN(4), |
|---|
| 717 | IN_TO_REG(VIA686A_INIT_IN_MIN_4, 4)); |
|---|
| 718 | via686a_write_value(client, VIA686A_REG_IN_MAX(4), |
|---|
| 719 | IN_TO_REG(VIA686A_INIT_IN_MAX_4, 4)); |
|---|
| 720 | via686a_write_value(client, VIA686A_REG_FAN_MIN(1), |
|---|
| 721 | FAN_TO_REG(VIA686A_INIT_FAN_MIN, 2)); |
|---|
| 722 | via686a_write_value(client, VIA686A_REG_FAN_MIN(2), |
|---|
| 723 | FAN_TO_REG(VIA686A_INIT_FAN_MIN, 2)); |
|---|
| 724 | for (i = 1; i <= 3; i++) { |
|---|
| 725 | via686a_write_value(client, VIA686A_REG_TEMP_OVER(i), |
|---|
| 726 | TEMP_TO_REG(VIA686A_INIT_TEMP_OVER)); |
|---|
| 727 | via686a_write_value(client, VIA686A_REG_TEMP_HYST(i), |
|---|
| 728 | TEMP_TO_REG(VIA686A_INIT_TEMP_HYST)); |
|---|
| 729 | } |
|---|
| 730 | |
|---|
| 731 | /* Start monitoring */ |
|---|
| 732 | via686a_write_value(client, VIA686A_REG_CONFIG, 0x01); |
|---|
| 733 | |
|---|
| 734 | /* Cofigure temp interrupt mode for continuous-interrupt operation */ |
|---|
| 735 | via686a_write_value(client, VIA686A_REG_TEMP_MODE, |
|---|
| 736 | via686a_read_value(client, VIA686A_REG_TEMP_MODE) & |
|---|
| 737 | !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); |
|---|
| 738 | } |
|---|
| 739 | |
|---|
| 740 | void via686a_update_client(struct i2c_client *client) |
|---|
| 741 | { |
|---|
| 742 | struct via686a_data *data = client->data; |
|---|
| 743 | int i; |
|---|
| 744 | |
|---|
| 745 | down(&data->update_lock); |
|---|
| 746 | |
|---|
| 747 | if ((jiffies - data->last_updated > HZ + HZ / 2) || |
|---|
| 748 | (jiffies < data->last_updated) || !data->valid) { |
|---|
| 749 | |
|---|
| 750 | for (i = 0; i <= 4; i++) { |
|---|
| 751 | data->in[i] = |
|---|
| 752 | via686a_read_value(client, VIA686A_REG_IN(i)); |
|---|
| 753 | data->in_min[i] = via686a_read_value(client, |
|---|
| 754 | VIA686A_REG_IN_MIN |
|---|
| 755 | (i)); |
|---|
| 756 | data->in_max[i] = |
|---|
| 757 | via686a_read_value(client, VIA686A_REG_IN_MAX(i)); |
|---|
| 758 | } |
|---|
| 759 | for (i = 1; i <= 2; i++) { |
|---|
| 760 | data->fan[i - 1] = |
|---|
| 761 | via686a_read_value(client, VIA686A_REG_FAN(i)); |
|---|
| 762 | data->fan_min[i - 1] = via686a_read_value(client, |
|---|
| 763 | VIA686A_REG_FAN_MIN(i)); |
|---|
| 764 | } |
|---|
| 765 | for (i = 1; i <= 3; i++) { |
|---|
| 766 | data->temp[i - 1] = via686a_read_value(client, |
|---|
| 767 | VIA686A_REG_TEMP(i)) << 2; |
|---|
| 768 | data->temp_over[i - 1] = |
|---|
| 769 | via686a_read_value(client, |
|---|
| 770 | VIA686A_REG_TEMP_OVER(i)); |
|---|
| 771 | data->temp_hyst[i - 1] = |
|---|
| 772 | via686a_read_value(client, |
|---|
| 773 | VIA686A_REG_TEMP_HYST(i)); |
|---|
| 774 | } |
|---|
| 775 | /* add in lower 2 bits |
|---|
| 776 | temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 |
|---|
| 777 | temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 |
|---|
| 778 | temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 |
|---|
| 779 | */ |
|---|
| 780 | data->temp[0] |= (via686a_read_value(client, |
|---|
| 781 | VIA686A_REG_TEMP_LOW1) |
|---|
| 782 | & 0xc0) >> 6; |
|---|
| 783 | data->temp[1] |= |
|---|
| 784 | (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & |
|---|
| 785 | 0x30) >> 4; |
|---|
| 786 | data->temp[2] |= |
|---|
| 787 | (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & |
|---|
| 788 | 0xc0) >> 6; |
|---|
| 789 | |
|---|
| 790 | i = via686a_read_value(client, VIA686A_REG_FANDIV); |
|---|
| 791 | data->fan_div[0] = (i >> 4) & 0x03; |
|---|
| 792 | data->fan_div[1] = i >> 6; |
|---|
| 793 | data->alarms = |
|---|
| 794 | via686a_read_value(client, |
|---|
| 795 | VIA686A_REG_ALARM1) | |
|---|
| 796 | (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); |
|---|
| 797 | data->last_updated = jiffies; |
|---|
| 798 | data->valid = 1; |
|---|
| 799 | } |
|---|
| 800 | |
|---|
| 801 | up(&data->update_lock); |
|---|
| 802 | } |
|---|
| 803 | |
|---|
| 804 | |
|---|
| 805 | /* The next few functions are the call-back functions of the /proc/sys and |
|---|
| 806 | sysctl files. Which function is used is defined in the ctl_table in |
|---|
| 807 | the extra1 field. |
|---|
| 808 | Each function must return the magnitude (power of 10 to divide the date |
|---|
| 809 | with) if it is called with operation==SENSORS_PROC_REAL_INFO. It must |
|---|
| 810 | put a maximum of *nrels elements in results reflecting the data of this |
|---|
| 811 | file, and set *nrels to the number it actually put in it, if operation== |
|---|
| 812 | SENSORS_PROC_REAL_READ. Finally, it must get upto *nrels elements from |
|---|
| 813 | results and write them to the chip, if operations==SENSORS_PROC_REAL_WRITE. |
|---|
| 814 | Note that on SENSORS_PROC_REAL_READ, I do not check whether results is |
|---|
| 815 | large enough (by checking the incoming value of *nrels). This is not very |
|---|
| 816 | good practice, but as long as you put less than about 5 values in results, |
|---|
| 817 | you can assume it is large enough. */ |
|---|
| 818 | void via686a_in(struct i2c_client *client, int operation, int ctl_name, |
|---|
| 819 | int *nrels_mag, long *results) |
|---|
| 820 | { |
|---|
| 821 | struct via686a_data *data = client->data; |
|---|
| 822 | int nr = ctl_name - VIA686A_SYSCTL_IN0; |
|---|
| 823 | |
|---|
| 824 | if (operation == SENSORS_PROC_REAL_INFO) |
|---|
| 825 | *nrels_mag = 2; |
|---|
| 826 | else if (operation == SENSORS_PROC_REAL_READ) { |
|---|
| 827 | via686a_update_client(client); |
|---|
| 828 | results[0] = IN_FROM_REG(data->in_min[nr], nr); |
|---|
| 829 | results[1] = IN_FROM_REG(data->in_max[nr], nr); |
|---|
| 830 | results[2] = IN_FROM_REG(data->in[nr], nr); |
|---|
| 831 | *nrels_mag = 3; |
|---|
| 832 | } else if (operation == SENSORS_PROC_REAL_WRITE) { |
|---|
| 833 | if (*nrels_mag >= 1) { |
|---|
| 834 | data->in_min[nr] = IN_TO_REG(results[0], nr); |
|---|
| 835 | via686a_write_value(client, VIA686A_REG_IN_MIN(nr), |
|---|
| 836 | data->in_min[nr]); |
|---|
| 837 | } |
|---|
| 838 | if (*nrels_mag >= 2) { |
|---|
| 839 | data->in_max[nr] = IN_TO_REG(results[1], nr); |
|---|
| 840 | via686a_write_value(client, VIA686A_REG_IN_MAX(nr), |
|---|
| 841 | data->in_max[nr]); |
|---|
| 842 | } |
|---|
| 843 | } |
|---|
| 844 | } |
|---|
| 845 | |
|---|
| 846 | void via686a_fan(struct i2c_client *client, int operation, int ctl_name, |
|---|
| 847 | int *nrels_mag, long *results) |
|---|
| 848 | { |
|---|
| 849 | struct via686a_data *data = client->data; |
|---|
| 850 | int nr = ctl_name - VIA686A_SYSCTL_FAN1 + 1; |
|---|
| 851 | |
|---|
| 852 | if (operation == SENSORS_PROC_REAL_INFO) |
|---|
| 853 | *nrels_mag = 0; |
|---|
| 854 | else if (operation == SENSORS_PROC_REAL_READ) { |
|---|
| 855 | via686a_update_client(client); |
|---|
| 856 | results[0] = FAN_FROM_REG(data->fan_min[nr - 1], |
|---|
| 857 | DIV_FROM_REG(data->fan_div |
|---|
| 858 | [nr - 1])); |
|---|
| 859 | results[1] = |
|---|
| 860 | FAN_FROM_REG(data->fan[nr - 1], |
|---|
| 861 | DIV_FROM_REG(data->fan_div[nr - 1])); |
|---|
| 862 | *nrels_mag = 2; |
|---|
| 863 | } else if (operation == SENSORS_PROC_REAL_WRITE) { |
|---|
| 864 | if (*nrels_mag >= 1) { |
|---|
| 865 | data->fan_min[nr - 1] = FAN_TO_REG(results[0], |
|---|
| 866 | DIV_FROM_REG(data-> |
|---|
| 867 | fan_div[nr -1])); |
|---|
| 868 | via686a_write_value(client, |
|---|
| 869 | VIA686A_REG_FAN_MIN(nr), |
|---|
| 870 | data->fan_min[nr - 1]); |
|---|
| 871 | } |
|---|
| 872 | } |
|---|
| 873 | } |
|---|
| 874 | |
|---|
| 875 | void via686a_temp(struct i2c_client *client, int operation, int ctl_name, |
|---|
| 876 | int *nrels_mag, long *results) |
|---|
| 877 | { |
|---|
| 878 | struct via686a_data *data = client->data; |
|---|
| 879 | int nr = ctl_name - VIA686A_SYSCTL_TEMP; |
|---|
| 880 | |
|---|
| 881 | if (operation == SENSORS_PROC_REAL_INFO) |
|---|
| 882 | *nrels_mag = 1; |
|---|
| 883 | else if (operation == SENSORS_PROC_REAL_READ) { |
|---|
| 884 | via686a_update_client(client); |
|---|
| 885 | results[0] = TEMP_FROM_REG(data->temp_over[nr]); |
|---|
| 886 | results[1] = TEMP_FROM_REG(data->temp_hyst[nr]); |
|---|
| 887 | results[2] = TEMP_FROM_REG10(data->temp[nr]); |
|---|
| 888 | *nrels_mag = 3; |
|---|
| 889 | } else if (operation == SENSORS_PROC_REAL_WRITE) { |
|---|
| 890 | if (*nrels_mag >= 1) { |
|---|
| 891 | data->temp_over[nr] = TEMP_TO_REG(results[0]); |
|---|
| 892 | via686a_write_value(client, |
|---|
| 893 | VIA686A_REG_TEMP_OVER(nr + 1), |
|---|
| 894 | data->temp_over[nr]); |
|---|
| 895 | } |
|---|
| 896 | if (*nrels_mag >= 2) { |
|---|
| 897 | data->temp_hyst[nr] = TEMP_TO_REG(results[1]); |
|---|
| 898 | via686a_write_value(client, |
|---|
| 899 | VIA686A_REG_TEMP_HYST(nr + 1), |
|---|
| 900 | data->temp_hyst[nr]); |
|---|
| 901 | } |
|---|
| 902 | } |
|---|
| 903 | } |
|---|
| 904 | |
|---|
| 905 | void via686a_alarms(struct i2c_client *client, int operation, int ctl_name, |
|---|
| 906 | int *nrels_mag, long *results) |
|---|
| 907 | { |
|---|
| 908 | struct via686a_data *data = client->data; |
|---|
| 909 | if (operation == SENSORS_PROC_REAL_INFO) |
|---|
| 910 | *nrels_mag = 0; |
|---|
| 911 | else if (operation == SENSORS_PROC_REAL_READ) { |
|---|
| 912 | via686a_update_client(client); |
|---|
| 913 | results[0] = ALARMS_FROM_REG(data->alarms); |
|---|
| 914 | *nrels_mag = 1; |
|---|
| 915 | } |
|---|
| 916 | } |
|---|
| 917 | |
|---|
| 918 | void via686a_fan_div(struct i2c_client *client, int operation, |
|---|
| 919 | int ctl_name, int *nrels_mag, long *results) |
|---|
| 920 | { |
|---|
| 921 | struct via686a_data *data = client->data; |
|---|
| 922 | int old; |
|---|
| 923 | |
|---|
| 924 | if (operation == SENSORS_PROC_REAL_INFO) |
|---|
| 925 | *nrels_mag = 0; |
|---|
| 926 | else if (operation == SENSORS_PROC_REAL_READ) { |
|---|
| 927 | via686a_update_client(client); |
|---|
| 928 | results[0] = DIV_FROM_REG(data->fan_div[0]); |
|---|
| 929 | results[1] = DIV_FROM_REG(data->fan_div[1]); |
|---|
| 930 | *nrels_mag = 2; |
|---|
| 931 | } else if (operation == SENSORS_PROC_REAL_WRITE) { |
|---|
| 932 | old = via686a_read_value(client, VIA686A_REG_FANDIV); |
|---|
| 933 | if (*nrels_mag >= 2) { |
|---|
| 934 | data->fan_div[1] = DIV_TO_REG(results[1]); |
|---|
| 935 | old = (old & 0x3f) | (data->fan_div[1] << 6); |
|---|
| 936 | } |
|---|
| 937 | if (*nrels_mag >= 1) { |
|---|
| 938 | data->fan_div[0] = DIV_TO_REG(results[0]); |
|---|
| 939 | old = (old & 0xcf) | (data->fan_div[0] << 4); |
|---|
| 940 | via686a_write_value(client, VIA686A_REG_FANDIV, |
|---|
| 941 | old); |
|---|
| 942 | } |
|---|
| 943 | } |
|---|
| 944 | } |
|---|
| 945 | |
|---|
| 946 | int __init sensors_via686a_init(void) |
|---|
| 947 | { |
|---|
| 948 | int res, addr; |
|---|
| 949 | |
|---|
| 950 | printk("via686a.o version %s (%s)\n", LM_VERSION, LM_DATE); |
|---|
| 951 | via686a_initialized = 0; |
|---|
| 952 | |
|---|
| 953 | if (via686a_find(&addr)) { |
|---|
| 954 | printk("via686a.o: No Via 686A sensors found.\n"); |
|---|
| 955 | return -ENODEV; |
|---|
| 956 | } |
|---|
| 957 | normal_isa[0] = addr; |
|---|
| 958 | |
|---|
| 959 | if ((res = i2c_add_driver(&via686a_driver))) { |
|---|
| 960 | printk("via686a.o: Driver registration failed.\n"); |
|---|
| 961 | via686a_cleanup(); |
|---|
| 962 | return res; |
|---|
| 963 | } |
|---|
| 964 | via686a_initialized++; |
|---|
| 965 | return 0; |
|---|
| 966 | } |
|---|
| 967 | |
|---|
| 968 | int __init via686a_cleanup(void) |
|---|
| 969 | { |
|---|
| 970 | int res; |
|---|
| 971 | |
|---|
| 972 | if (via686a_initialized >= 1) { |
|---|
| 973 | if ((res = i2c_del_driver(&via686a_driver))) { |
|---|
| 974 | printk |
|---|
| 975 | ("via686a.o: Driver deregistration failed.\n"); |
|---|
| 976 | return res; |
|---|
| 977 | } |
|---|
| 978 | via686a_initialized--; |
|---|
| 979 | } |
|---|
| 980 | return 0; |
|---|
| 981 | } |
|---|
| 982 | |
|---|
| 983 | EXPORT_NO_SYMBOLS; |
|---|
| 984 | |
|---|
| 985 | #ifdef MODULE |
|---|
| 986 | |
|---|
| 987 | MODULE_AUTHOR |
|---|
| 988 | ("Kyösti Mälkki <kmalkki@cc.hut.fi>, Mark Studebaker <mdsxyz123@yahoo.com>, Bob Dougherty <bobd@stanford.edu>"); |
|---|
| 989 | MODULE_DESCRIPTION("VIA 686A Sensor device"); |
|---|
| 990 | |
|---|
| 991 | int init_module(void) |
|---|
| 992 | { |
|---|
| 993 | return sensors_via686a_init(); |
|---|
| 994 | } |
|---|
| 995 | |
|---|
| 996 | int cleanup_module(void) |
|---|
| 997 | { |
|---|
| 998 | return via686a_cleanup(); |
|---|
| 999 | } |
|---|
| 1000 | |
|---|
| 1001 | #endif /* MODULE */ |
|---|