Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | via686a.c - Part of lm_sensors, Linux kernel modules |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 3 | for hardware monitoring |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 4 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 6 | Kyösti Mälkki <kmalkki@cc.hut.fi>, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | Mark Studebaker <mdsxyz123@yahoo.com>, |
| 8 | and Bob Dougherty <bobd@stanford.edu> |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 9 | (Some conversion-factor data were contributed by Jonathan Teh Soon Yew |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.) |
| 11 | |
| 12 | This program is free software; you can redistribute it and/or modify |
| 13 | it under the terms of the GNU General Public License as published by |
| 14 | the Free Software Foundation; either version 2 of the License, or |
| 15 | (at your option) any later version. |
| 16 | |
| 17 | This program is distributed in the hope that it will be useful, |
| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | GNU General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with this program; if not, write to the Free Software |
| 24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | /* |
| 28 | Supports the Via VT82C686A, VT82C686B south bridges. |
| 29 | Reports all as a 686A. |
| 30 | Warning - only supports a single device. |
| 31 | */ |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/module.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/jiffies.h> |
| 37 | #include <linux/i2c.h> |
| 38 | #include <linux/i2c-sensor.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 39 | #include <linux/hwmon.h> |
| 40 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/init.h> |
| 42 | #include <asm/io.h> |
| 43 | |
| 44 | |
| 45 | /* If force_addr is set to anything different from 0, we forcibly enable |
| 46 | the device at the given address. */ |
| 47 | static unsigned short force_addr = 0; |
| 48 | module_param(force_addr, ushort, 0); |
| 49 | MODULE_PARM_DESC(force_addr, |
| 50 | "Initialize the base address of the sensors"); |
| 51 | |
| 52 | /* Addresses to scan. |
| 53 | Note that we can't determine the ISA address until we have initialized |
| 54 | our module */ |
| 55 | static unsigned short normal_i2c[] = { I2C_CLIENT_END }; |
| 56 | static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END }; |
| 57 | |
| 58 | /* Insmod parameters */ |
| 59 | SENSORS_INSMOD_1(via686a); |
| 60 | |
| 61 | /* |
| 62 | The Via 686a southbridge has a LM78-like chip integrated on the same IC. |
| 63 | This driver is a customized copy of lm78.c |
| 64 | */ |
| 65 | |
| 66 | /* Many VIA686A constants specified below */ |
| 67 | |
| 68 | /* Length of ISA address segment */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 69 | #define VIA686A_EXTENT 0x80 |
| 70 | #define VIA686A_BASE_REG 0x70 |
| 71 | #define VIA686A_ENABLE_REG 0x74 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* The VIA686A registers */ |
| 74 | /* ins numbered 0-4 */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 75 | #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) |
| 76 | #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) |
| 77 | #define VIA686A_REG_IN(nr) (0x22 + (nr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* fans numbered 1-2 */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 80 | #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) |
| 81 | #define VIA686A_REG_FAN(nr) (0x28 + (nr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | /* temps numbered 1-3 */ |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 84 | static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; |
| 85 | static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; |
| 86 | static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 87 | /* bits 7-6 */ |
| 88 | #define VIA686A_REG_TEMP_LOW1 0x4b |
| 89 | /* 2 = bits 5-4, 3 = bits 7-6 */ |
| 90 | #define VIA686A_REG_TEMP_LOW23 0x49 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 92 | #define VIA686A_REG_ALARM1 0x41 |
| 93 | #define VIA686A_REG_ALARM2 0x42 |
| 94 | #define VIA686A_REG_FANDIV 0x47 |
| 95 | #define VIA686A_REG_CONFIG 0x40 |
| 96 | /* The following register sets temp interrupt mode (bits 1-0 for temp1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | 3-2 for temp2, 5-4 for temp3). Modes are: |
| 98 | 00 interrupt stays as long as value is out-of-range |
| 99 | 01 interrupt is cleared once register is read (default) |
| 100 | 10 comparator mode- like 00, but ignores hysteresis |
| 101 | 11 same as 00 */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 102 | #define VIA686A_REG_TEMP_MODE 0x4b |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* We'll just assume that you want to set all 3 simultaneously: */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 104 | #define VIA686A_TEMP_MODE_MASK 0x3F |
| 105 | #define VIA686A_TEMP_MODE_CONTINUOUS 0x00 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | /* Conversions. Limit checking is only done on the TO_REG |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 108 | variants. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
| 110 | ********* VOLTAGE CONVERSIONS (Bob Dougherty) ******** |
| 111 | From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): |
| 112 | voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp |
| 113 | voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V |
| 114 | voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V |
| 115 | voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V |
| 116 | voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V |
| 117 | in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; |
| 118 | That is: |
| 119 | volts = (25*regVal+133)*factor |
| 120 | regVal = (volts/factor-133)/25 |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 121 | (These conversions were contributed by Jonathan Teh Soon Yew |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | <j.teh@iname.com>) */ |
| 123 | static inline u8 IN_TO_REG(long val, int inNum) |
| 124 | { |
| 125 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). |
| 126 | Rounding is done (120500 is actually 133000 - 12500). |
| 127 | Remember that val is expressed in 0.001V/bit, which is why we divide |
| 128 | by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) |
| 129 | for the constants. */ |
| 130 | if (inNum <= 1) |
| 131 | return (u8) |
| 132 | SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255); |
| 133 | else if (inNum == 2) |
| 134 | return (u8) |
| 135 | SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255); |
| 136 | else if (inNum == 3) |
| 137 | return (u8) |
| 138 | SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255); |
| 139 | else |
| 140 | return (u8) |
| 141 | SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255); |
| 142 | } |
| 143 | |
| 144 | static inline long IN_FROM_REG(u8 val, int inNum) |
| 145 | { |
| 146 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). |
| 147 | We also multiply them by 1000 because we want 0.001V/bit for the |
| 148 | output value. Rounding is done. */ |
| 149 | if (inNum <= 1) |
| 150 | return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); |
| 151 | else if (inNum == 2) |
| 152 | return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); |
| 153 | else if (inNum == 3) |
| 154 | return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); |
| 155 | else |
| 156 | return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); |
| 157 | } |
| 158 | |
| 159 | /********* FAN RPM CONVERSIONS ********/ |
| 160 | /* Higher register values = slower fans (the fan's strobe gates a counter). |
| 161 | But this chip saturates back at 0, not at 255 like all the other chips. |
| 162 | So, 0 means 0 RPM */ |
| 163 | static inline u8 FAN_TO_REG(long rpm, int div) |
| 164 | { |
| 165 | if (rpm == 0) |
| 166 | return 0; |
| 167 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); |
| 168 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); |
| 169 | } |
| 170 | |
| 171 | #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) |
| 172 | |
| 173 | /******** TEMP CONVERSIONS (Bob Dougherty) *********/ |
| 174 | /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) |
| 175 | if(temp<169) |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 176 | return double(temp)*0.427-32.08; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | else if(temp>=169 && temp<=202) |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 178 | return double(temp)*0.582-58.16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | else |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 180 | return double(temp)*0.924-127.33; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 182 | A fifth-order polynomial fits the unofficial data (provided by Alex van |
| 183 | Kaam <darkside@chello.nl>) a bit better. It also give more reasonable |
| 184 | numbers on my machine (ie. they agree with what my BIOS tells me). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | Here's the fifth-order fit to the 8-bit data: |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 186 | temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - |
Denis Vlasenko | 6328c0e | 2005-06-22 10:25:13 +0300 | [diff] [blame] | 187 | 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 189 | (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | finding my typos in this formula!) |
| 191 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 192 | Alas, none of the elegant function-fit solutions will work because we |
| 193 | aren't allowed to use floating point in the kernel and doing it with |
| 194 | integers doesn't provide enough precision. So we'll do boring old |
| 195 | look-up table stuff. The unofficial data (see below) have effectively |
| 196 | 7-bit resolution (they are rounded to the nearest degree). I'm assuming |
| 197 | that the transfer function of the device is monotonic and smooth, so a |
| 198 | smooth function fit to the data will allow us to get better precision. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | I used the 5th-order poly fit described above and solved for |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 200 | VIA register values 0-255. I *10 before rounding, so we get tenth-degree |
| 201 | precision. (I could have done all 1024 values for our 10-bit readings, |
| 202 | but the function is very linear in the useful range (0-80 deg C), so |
| 203 | we'll just use linear interpolation for 10-bit readings.) So, tempLUT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | is the temp at via register values 0-255: */ |
| 205 | static const long tempLUT[] = |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 206 | { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, |
| 207 | -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, |
| 208 | -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, |
| 209 | -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, |
| 210 | -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, |
| 211 | -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, |
| 212 | -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, |
| 213 | 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, |
| 214 | 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, |
| 215 | 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, |
| 216 | 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, |
| 217 | 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, |
| 218 | 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, |
| 219 | 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, |
| 220 | 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, |
| 221 | 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, |
| 222 | 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, |
| 223 | 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, |
| 224 | 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, |
| 225 | 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, |
| 226 | 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, |
| 227 | 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | }; |
| 229 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 230 | /* the original LUT values from Alex van Kaam <darkside@chello.nl> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | (for via register values 12-240): |
| 232 | {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, |
| 233 | -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, |
| 234 | -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, |
| 235 | -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, |
| 236 | 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, |
| 237 | 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, |
| 238 | 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, |
| 239 | 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, |
| 240 | 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, |
| 241 | 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; |
| 242 | |
| 243 | |
| 244 | Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 245 | an extra term for a good fit to these inverse data!) and then |
| 246 | solving for each temp value from -50 to 110 (the useable range for |
| 247 | this chip). Here's the fit: |
| 248 | viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) |
| 250 | Note that n=161: */ |
| 251 | static const u8 viaLUT[] = |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 252 | { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, |
| 253 | 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, |
| 254 | 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, |
| 255 | 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, |
| 256 | 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, |
| 257 | 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, |
| 258 | 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, |
| 259 | 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, |
| 260 | 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, |
| 261 | 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, |
| 262 | 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, |
| 263 | 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, |
| 264 | 239, 240 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | }; |
| 266 | |
| 267 | /* Converting temps to (8-bit) hyst and over registers |
| 268 | No interpolation here. |
| 269 | The +50 is because the temps start at -50 */ |
| 270 | static inline u8 TEMP_TO_REG(long val) |
| 271 | { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 272 | return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 : |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | (val < 0 ? val - 500 : val + 500) / 1000 + 50]; |
| 274 | } |
| 275 | |
| 276 | /* for 8-bit temperature hyst and over registers */ |
| 277 | #define TEMP_FROM_REG(val) (tempLUT[(val)] * 100) |
| 278 | |
| 279 | /* for 10-bit temperature readings */ |
| 280 | static inline long TEMP_FROM_REG10(u16 val) |
| 281 | { |
| 282 | u16 eightBits = val >> 2; |
| 283 | u16 twoBits = val & 3; |
| 284 | |
| 285 | /* no interpolation for these */ |
| 286 | if (twoBits == 0 || eightBits == 255) |
| 287 | return TEMP_FROM_REG(eightBits); |
| 288 | |
| 289 | /* do some linear interpolation */ |
| 290 | return (tempLUT[eightBits] * (4 - twoBits) + |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 291 | tempLUT[eightBits + 1] * twoBits) * 25; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | #define DIV_FROM_REG(val) (1 << (val)) |
| 295 | #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) |
| 296 | |
| 297 | /* For the VIA686A, we need to keep some data in memory. |
| 298 | The structure is dynamically allocated, at the same time when a new |
| 299 | via686a client is allocated. */ |
| 300 | struct via686a_data { |
| 301 | struct i2c_client client; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 302 | struct class_device *class_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | struct semaphore update_lock; |
| 304 | char valid; /* !=0 if following fields are valid */ |
| 305 | unsigned long last_updated; /* In jiffies */ |
| 306 | |
| 307 | u8 in[5]; /* Register value */ |
| 308 | u8 in_max[5]; /* Register value */ |
| 309 | u8 in_min[5]; /* Register value */ |
| 310 | u8 fan[2]; /* Register value */ |
| 311 | u8 fan_min[2]; /* Register value */ |
| 312 | u16 temp[3]; /* Register value 10 bit */ |
| 313 | u8 temp_over[3]; /* Register value */ |
| 314 | u8 temp_hyst[3]; /* Register value */ |
| 315 | u8 fan_div[2]; /* Register encoding, shifted right */ |
| 316 | u16 alarms; /* Register encoding, combined */ |
| 317 | }; |
| 318 | |
| 319 | static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ |
| 320 | |
| 321 | static int via686a_attach_adapter(struct i2c_adapter *adapter); |
| 322 | static int via686a_detect(struct i2c_adapter *adapter, int address, int kind); |
| 323 | static int via686a_detach_client(struct i2c_client *client); |
| 324 | |
| 325 | static inline int via686a_read_value(struct i2c_client *client, u8 reg) |
| 326 | { |
| 327 | return (inb_p(client->addr + reg)); |
| 328 | } |
| 329 | |
| 330 | static inline void via686a_write_value(struct i2c_client *client, u8 reg, |
| 331 | u8 value) |
| 332 | { |
| 333 | outb_p(value, client->addr + reg); |
| 334 | } |
| 335 | |
| 336 | static struct via686a_data *via686a_update_device(struct device *dev); |
| 337 | static void via686a_init_client(struct i2c_client *client); |
| 338 | |
| 339 | /* following are the sysfs callback functions */ |
| 340 | |
| 341 | /* 7 voltage sensors */ |
| 342 | static ssize_t show_in(struct device *dev, char *buf, int nr) { |
| 343 | struct via686a_data *data = via686a_update_device(dev); |
| 344 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); |
| 345 | } |
| 346 | |
| 347 | static ssize_t show_in_min(struct device *dev, char *buf, int nr) { |
| 348 | struct via686a_data *data = via686a_update_device(dev); |
| 349 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); |
| 350 | } |
| 351 | |
| 352 | static ssize_t show_in_max(struct device *dev, char *buf, int nr) { |
| 353 | struct via686a_data *data = via686a_update_device(dev); |
| 354 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); |
| 355 | } |
| 356 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 357 | static ssize_t set_in_min(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | size_t count, int nr) { |
| 359 | struct i2c_client *client = to_i2c_client(dev); |
| 360 | struct via686a_data *data = i2c_get_clientdata(client); |
| 361 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 362 | |
| 363 | down(&data->update_lock); |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 364 | data->in_min[nr] = IN_TO_REG(val, nr); |
| 365 | via686a_write_value(client, VIA686A_REG_IN_MIN(nr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | data->in_min[nr]); |
| 367 | up(&data->update_lock); |
| 368 | return count; |
| 369 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 370 | static ssize_t set_in_max(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | size_t count, int nr) { |
| 372 | struct i2c_client *client = to_i2c_client(dev); |
| 373 | struct via686a_data *data = i2c_get_clientdata(client); |
| 374 | unsigned long val = simple_strtoul(buf, NULL, 10); |
| 375 | |
| 376 | down(&data->update_lock); |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 377 | data->in_max[nr] = IN_TO_REG(val, nr); |
| 378 | via686a_write_value(client, VIA686A_REG_IN_MAX(nr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | data->in_max[nr]); |
| 380 | up(&data->update_lock); |
| 381 | return count; |
| 382 | } |
| 383 | #define show_in_offset(offset) \ |
| 384 | static ssize_t \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 385 | show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { \ |
| 387 | return show_in(dev, buf, offset); \ |
| 388 | } \ |
| 389 | static ssize_t \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 390 | show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { \ |
| 392 | return show_in_min(dev, buf, offset); \ |
| 393 | } \ |
| 394 | static ssize_t \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 395 | show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { \ |
| 397 | return show_in_max(dev, buf, offset); \ |
| 398 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 399 | static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | const char *buf, size_t count) \ |
| 401 | { \ |
| 402 | return set_in_min(dev, buf, count, offset); \ |
| 403 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 404 | static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | const char *buf, size_t count) \ |
| 406 | { \ |
| 407 | return set_in_max(dev, buf, count, offset); \ |
| 408 | } \ |
| 409 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\ |
| 410 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
| 411 | show_in##offset##_min, set_in##offset##_min); \ |
| 412 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
| 413 | show_in##offset##_max, set_in##offset##_max); |
| 414 | |
| 415 | show_in_offset(0); |
| 416 | show_in_offset(1); |
| 417 | show_in_offset(2); |
| 418 | show_in_offset(3); |
| 419 | show_in_offset(4); |
| 420 | |
| 421 | /* 3 temperatures */ |
| 422 | static ssize_t show_temp(struct device *dev, char *buf, int nr) { |
| 423 | struct via686a_data *data = via686a_update_device(dev); |
| 424 | return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); |
| 425 | } |
| 426 | static ssize_t show_temp_over(struct device *dev, char *buf, int nr) { |
| 427 | struct via686a_data *data = via686a_update_device(dev); |
| 428 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); |
| 429 | } |
| 430 | static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) { |
| 431 | struct via686a_data *data = via686a_update_device(dev); |
| 432 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); |
| 433 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 434 | static ssize_t set_temp_over(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | size_t count, int nr) { |
| 436 | struct i2c_client *client = to_i2c_client(dev); |
| 437 | struct via686a_data *data = i2c_get_clientdata(client); |
| 438 | int val = simple_strtol(buf, NULL, 10); |
| 439 | |
| 440 | down(&data->update_lock); |
| 441 | data->temp_over[nr] = TEMP_TO_REG(val); |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 442 | via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr], |
| 443 | data->temp_over[nr]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | up(&data->update_lock); |
| 445 | return count; |
| 446 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 447 | static ssize_t set_temp_hyst(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | size_t count, int nr) { |
| 449 | struct i2c_client *client = to_i2c_client(dev); |
| 450 | struct via686a_data *data = i2c_get_clientdata(client); |
| 451 | int val = simple_strtol(buf, NULL, 10); |
| 452 | |
| 453 | down(&data->update_lock); |
| 454 | data->temp_hyst[nr] = TEMP_TO_REG(val); |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 455 | via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr], |
| 456 | data->temp_hyst[nr]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | up(&data->update_lock); |
| 458 | return count; |
| 459 | } |
| 460 | #define show_temp_offset(offset) \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 461 | static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { \ |
| 463 | return show_temp(dev, buf, offset - 1); \ |
| 464 | } \ |
| 465 | static ssize_t \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 466 | show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { \ |
| 468 | return show_temp_over(dev, buf, offset - 1); \ |
| 469 | } \ |
| 470 | static ssize_t \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 471 | show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | { \ |
| 473 | return show_temp_hyst(dev, buf, offset - 1); \ |
| 474 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 475 | static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | const char *buf, size_t count) \ |
| 477 | { \ |
| 478 | return set_temp_over(dev, buf, count, offset - 1); \ |
| 479 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 480 | static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | const char *buf, size_t count) \ |
| 482 | { \ |
| 483 | return set_temp_hyst(dev, buf, count, offset - 1); \ |
| 484 | } \ |
| 485 | static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\ |
| 486 | static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ |
| 487 | show_temp_##offset##_over, set_temp_##offset##_over); \ |
| 488 | static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 489 | show_temp_##offset##_hyst, set_temp_##offset##_hyst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | show_temp_offset(1); |
| 492 | show_temp_offset(2); |
| 493 | show_temp_offset(3); |
| 494 | |
| 495 | /* 2 Fans */ |
| 496 | static ssize_t show_fan(struct device *dev, char *buf, int nr) { |
| 497 | struct via686a_data *data = via686a_update_device(dev); |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 498 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | DIV_FROM_REG(data->fan_div[nr])) ); |
| 500 | } |
| 501 | static ssize_t show_fan_min(struct device *dev, char *buf, int nr) { |
| 502 | struct via686a_data *data = via686a_update_device(dev); |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 503 | return sprintf(buf, "%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); |
| 505 | } |
| 506 | static ssize_t show_fan_div(struct device *dev, char *buf, int nr) { |
| 507 | struct via686a_data *data = via686a_update_device(dev); |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 508 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 510 | static ssize_t set_fan_min(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | size_t count, int nr) { |
| 512 | struct i2c_client *client = to_i2c_client(dev); |
| 513 | struct via686a_data *data = i2c_get_clientdata(client); |
| 514 | int val = simple_strtol(buf, NULL, 10); |
| 515 | |
| 516 | down(&data->update_lock); |
| 517 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
| 518 | via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); |
| 519 | up(&data->update_lock); |
| 520 | return count; |
| 521 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 522 | static ssize_t set_fan_div(struct device *dev, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | size_t count, int nr) { |
| 524 | struct i2c_client *client = to_i2c_client(dev); |
| 525 | struct via686a_data *data = i2c_get_clientdata(client); |
| 526 | int val = simple_strtol(buf, NULL, 10); |
| 527 | int old; |
| 528 | |
| 529 | down(&data->update_lock); |
| 530 | old = via686a_read_value(client, VIA686A_REG_FANDIV); |
| 531 | data->fan_div[nr] = DIV_TO_REG(val); |
| 532 | old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); |
| 533 | via686a_write_value(client, VIA686A_REG_FANDIV, old); |
| 534 | up(&data->update_lock); |
| 535 | return count; |
| 536 | } |
| 537 | |
| 538 | #define show_fan_offset(offset) \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 539 | static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | { \ |
| 541 | return show_fan(dev, buf, offset - 1); \ |
| 542 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 543 | static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | { \ |
| 545 | return show_fan_min(dev, buf, offset - 1); \ |
| 546 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 547 | static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | { \ |
| 549 | return show_fan_div(dev, buf, offset - 1); \ |
| 550 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 551 | static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | const char *buf, size_t count) \ |
| 553 | { \ |
| 554 | return set_fan_min(dev, buf, count, offset - 1); \ |
| 555 | } \ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 556 | static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | const char *buf, size_t count) \ |
| 558 | { \ |
| 559 | return set_fan_div(dev, buf, count, offset - 1); \ |
| 560 | } \ |
| 561 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ |
| 562 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
| 563 | show_fan_##offset##_min, set_fan_##offset##_min); \ |
| 564 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
| 565 | show_fan_##offset##_div, set_fan_##offset##_div); |
| 566 | |
| 567 | show_fan_offset(1); |
| 568 | show_fan_offset(2); |
| 569 | |
| 570 | /* Alarms */ |
Yani Ioannou | a5099cf | 2005-05-17 06:42:25 -0400 | [diff] [blame] | 571 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | struct via686a_data *data = via686a_update_device(dev); |
Jean Delvare | 68188ba | 2005-05-16 18:52:38 +0200 | [diff] [blame] | 573 | return sprintf(buf, "%u\n", data->alarms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
Jean Delvare | 1d66c64 | 2005-04-18 21:16:59 -0700 | [diff] [blame] | 575 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | /* The driver. I choose to use type i2c_driver, as at is identical to both |
| 578 | smbus_driver and isa_driver, and clients could be of either kind */ |
| 579 | static struct i2c_driver via686a_driver = { |
| 580 | .owner = THIS_MODULE, |
| 581 | .name = "via686a", |
| 582 | .id = I2C_DRIVERID_VIA686A, |
| 583 | .flags = I2C_DF_NOTIFY, |
| 584 | .attach_adapter = via686a_attach_adapter, |
| 585 | .detach_client = via686a_detach_client, |
| 586 | }; |
| 587 | |
| 588 | |
| 589 | /* This is called when the module is loaded */ |
| 590 | static int via686a_attach_adapter(struct i2c_adapter *adapter) |
| 591 | { |
| 592 | if (!(adapter->class & I2C_CLASS_HWMON)) |
| 593 | return 0; |
| 594 | return i2c_detect(adapter, &addr_data, via686a_detect); |
| 595 | } |
| 596 | |
| 597 | static int via686a_detect(struct i2c_adapter *adapter, int address, int kind) |
| 598 | { |
| 599 | struct i2c_client *new_client; |
| 600 | struct via686a_data *data; |
| 601 | int err = 0; |
| 602 | const char client_name[] = "via686a"; |
| 603 | u16 val; |
| 604 | |
| 605 | /* Make sure we are probing the ISA bus!! */ |
| 606 | if (!i2c_is_isa_adapter(adapter)) { |
| 607 | dev_err(&adapter->dev, |
| 608 | "via686a_detect called for an I2C bus adapter?!?\n"); |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | /* 8231 requires multiple of 256, we enforce that on 686 as well */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 613 | if (force_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | address = force_addr & 0xFF00; |
| 615 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 616 | if (force_addr) { |
| 617 | dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", |
| 618 | address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | if (PCIBIOS_SUCCESSFUL != |
| 620 | pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) |
| 621 | return -ENODEV; |
| 622 | } |
| 623 | if (PCIBIOS_SUCCESSFUL != |
| 624 | pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) |
| 625 | return -ENODEV; |
| 626 | if (!(val & 0x0001)) { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 627 | dev_warn(&adapter->dev, "enabling sensors\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | if (PCIBIOS_SUCCESSFUL != |
| 629 | pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 630 | val | 0x0001)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | return -ENODEV; |
| 632 | } |
| 633 | |
| 634 | /* Reserve the ISA region */ |
| 635 | if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 636 | dev_err(&adapter->dev, "region 0x%x already in use!\n", |
| 637 | address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | return -ENODEV; |
| 639 | } |
| 640 | |
| 641 | if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) { |
| 642 | err = -ENOMEM; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 643 | goto exit_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
| 645 | memset(data, 0, sizeof(struct via686a_data)); |
| 646 | |
| 647 | new_client = &data->client; |
| 648 | i2c_set_clientdata(new_client, data); |
| 649 | new_client->addr = address; |
| 650 | new_client->adapter = adapter; |
| 651 | new_client->driver = &via686a_driver; |
| 652 | new_client->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | /* Fill in the remaining client fields and put into the global list */ |
Jean Delvare | 86b5ac8 | 2005-04-18 21:16:58 -0700 | [diff] [blame] | 655 | strlcpy(new_client->name, client_name, I2C_NAME_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | data->valid = 0; |
| 658 | init_MUTEX(&data->update_lock); |
| 659 | /* Tell the I2C layer a new client has arrived */ |
| 660 | if ((err = i2c_attach_client(new_client))) |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 661 | goto exit_free; |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | /* Initialize the VIA686A chip */ |
| 664 | via686a_init_client(new_client); |
| 665 | |
| 666 | /* Register sysfs hooks */ |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 667 | data->class_dev = hwmon_device_register(&new_client->dev); |
| 668 | if (IS_ERR(data->class_dev)) { |
| 669 | err = PTR_ERR(data->class_dev); |
| 670 | goto exit_detach; |
| 671 | } |
| 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | device_create_file(&new_client->dev, &dev_attr_in0_input); |
| 674 | device_create_file(&new_client->dev, &dev_attr_in1_input); |
| 675 | device_create_file(&new_client->dev, &dev_attr_in2_input); |
| 676 | device_create_file(&new_client->dev, &dev_attr_in3_input); |
| 677 | device_create_file(&new_client->dev, &dev_attr_in4_input); |
| 678 | device_create_file(&new_client->dev, &dev_attr_in0_min); |
| 679 | device_create_file(&new_client->dev, &dev_attr_in1_min); |
| 680 | device_create_file(&new_client->dev, &dev_attr_in2_min); |
| 681 | device_create_file(&new_client->dev, &dev_attr_in3_min); |
| 682 | device_create_file(&new_client->dev, &dev_attr_in4_min); |
| 683 | device_create_file(&new_client->dev, &dev_attr_in0_max); |
| 684 | device_create_file(&new_client->dev, &dev_attr_in1_max); |
| 685 | device_create_file(&new_client->dev, &dev_attr_in2_max); |
| 686 | device_create_file(&new_client->dev, &dev_attr_in3_max); |
| 687 | device_create_file(&new_client->dev, &dev_attr_in4_max); |
| 688 | device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| 689 | device_create_file(&new_client->dev, &dev_attr_temp2_input); |
| 690 | device_create_file(&new_client->dev, &dev_attr_temp3_input); |
| 691 | device_create_file(&new_client->dev, &dev_attr_temp1_max); |
| 692 | device_create_file(&new_client->dev, &dev_attr_temp2_max); |
| 693 | device_create_file(&new_client->dev, &dev_attr_temp3_max); |
| 694 | device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); |
| 695 | device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst); |
| 696 | device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst); |
| 697 | device_create_file(&new_client->dev, &dev_attr_fan1_input); |
| 698 | device_create_file(&new_client->dev, &dev_attr_fan2_input); |
| 699 | device_create_file(&new_client->dev, &dev_attr_fan1_min); |
| 700 | device_create_file(&new_client->dev, &dev_attr_fan2_min); |
| 701 | device_create_file(&new_client->dev, &dev_attr_fan1_div); |
| 702 | device_create_file(&new_client->dev, &dev_attr_fan2_div); |
| 703 | device_create_file(&new_client->dev, &dev_attr_alarms); |
| 704 | |
| 705 | return 0; |
| 706 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 707 | exit_detach: |
| 708 | i2c_detach_client(new_client); |
| 709 | exit_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | kfree(data); |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 711 | exit_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | release_region(address, VIA686A_EXTENT); |
| 713 | return err; |
| 714 | } |
| 715 | |
| 716 | static int via686a_detach_client(struct i2c_client *client) |
| 717 | { |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 718 | struct via686a_data *data = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | int err; |
| 720 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 721 | hwmon_device_unregister(data->class_dev); |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | if ((err = i2c_detach_client(client))) { |
| 724 | dev_err(&client->dev, |
| 725 | "Client deregistration failed, client not detached.\n"); |
| 726 | return err; |
| 727 | } |
| 728 | |
| 729 | release_region(client->addr, VIA686A_EXTENT); |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame^] | 730 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | /* Called when we have found a new VIA686A. Set limits, etc. */ |
| 736 | static void via686a_init_client(struct i2c_client *client) |
| 737 | { |
| 738 | u8 reg; |
| 739 | |
| 740 | /* Start monitoring */ |
| 741 | reg = via686a_read_value(client, VIA686A_REG_CONFIG); |
| 742 | via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F); |
| 743 | |
| 744 | /* Configure temp interrupt mode for continuous-interrupt operation */ |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 745 | via686a_write_value(client, VIA686A_REG_TEMP_MODE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | via686a_read_value(client, VIA686A_REG_TEMP_MODE) & |
| 747 | !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); |
| 748 | } |
| 749 | |
| 750 | static struct via686a_data *via686a_update_device(struct device *dev) |
| 751 | { |
| 752 | struct i2c_client *client = to_i2c_client(dev); |
| 753 | struct via686a_data *data = i2c_get_clientdata(client); |
| 754 | int i; |
| 755 | |
| 756 | down(&data->update_lock); |
| 757 | |
| 758 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 759 | || !data->valid) { |
| 760 | for (i = 0; i <= 4; i++) { |
| 761 | data->in[i] = |
| 762 | via686a_read_value(client, VIA686A_REG_IN(i)); |
| 763 | data->in_min[i] = via686a_read_value(client, |
| 764 | VIA686A_REG_IN_MIN |
| 765 | (i)); |
| 766 | data->in_max[i] = |
| 767 | via686a_read_value(client, VIA686A_REG_IN_MAX(i)); |
| 768 | } |
| 769 | for (i = 1; i <= 2; i++) { |
| 770 | data->fan[i - 1] = |
| 771 | via686a_read_value(client, VIA686A_REG_FAN(i)); |
| 772 | data->fan_min[i - 1] = via686a_read_value(client, |
| 773 | VIA686A_REG_FAN_MIN(i)); |
| 774 | } |
| 775 | for (i = 0; i <= 2; i++) { |
| 776 | data->temp[i] = via686a_read_value(client, |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 777 | VIA686A_REG_TEMP[i]) << 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | data->temp_over[i] = |
| 779 | via686a_read_value(client, |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 780 | VIA686A_REG_TEMP_OVER[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | data->temp_hyst[i] = |
| 782 | via686a_read_value(client, |
Jean Delvare | 563db2f | 2005-05-17 22:38:57 +0200 | [diff] [blame] | 783 | VIA686A_REG_TEMP_HYST[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 785 | /* add in lower 2 bits |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 |
| 787 | temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 |
| 788 | temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 |
| 789 | */ |
| 790 | data->temp[0] |= (via686a_read_value(client, |
| 791 | VIA686A_REG_TEMP_LOW1) |
| 792 | & 0xc0) >> 6; |
| 793 | data->temp[1] |= |
| 794 | (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & |
| 795 | 0x30) >> 4; |
| 796 | data->temp[2] |= |
| 797 | (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & |
| 798 | 0xc0) >> 6; |
| 799 | |
| 800 | i = via686a_read_value(client, VIA686A_REG_FANDIV); |
| 801 | data->fan_div[0] = (i >> 4) & 0x03; |
| 802 | data->fan_div[1] = i >> 6; |
| 803 | data->alarms = |
| 804 | via686a_read_value(client, |
| 805 | VIA686A_REG_ALARM1) | |
| 806 | (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); |
| 807 | data->last_updated = jiffies; |
| 808 | data->valid = 1; |
| 809 | } |
| 810 | |
| 811 | up(&data->update_lock); |
| 812 | |
| 813 | return data; |
| 814 | } |
| 815 | |
| 816 | static struct pci_device_id via686a_pci_ids[] = { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 817 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, |
| 818 | { 0, } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | }; |
| 820 | |
| 821 | MODULE_DEVICE_TABLE(pci, via686a_pci_ids); |
| 822 | |
| 823 | static int __devinit via686a_pci_probe(struct pci_dev *dev, |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 824 | const struct pci_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 826 | u16 val; |
| 827 | int addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 829 | if (PCIBIOS_SUCCESSFUL != |
| 830 | pci_read_config_word(dev, VIA686A_BASE_REG, &val)) |
| 831 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 833 | addr = val & ~(VIA686A_EXTENT - 1); |
| 834 | if (addr == 0 && force_addr == 0) { |
| 835 | dev_err(&dev->dev, "base address not set - upgrade BIOS " |
| 836 | "or use force_addr=0xaddr\n"); |
| 837 | return -ENODEV; |
| 838 | } |
| 839 | if (force_addr) |
| 840 | addr = force_addr; /* so detect will get called */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 842 | if (!addr) { |
| 843 | dev_err(&dev->dev, "No Via 686A sensors found.\n"); |
| 844 | return -ENODEV; |
| 845 | } |
| 846 | normal_isa[0] = addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
| 848 | s_bridge = pci_dev_get(dev); |
| 849 | if (i2c_add_driver(&via686a_driver)) { |
| 850 | pci_dev_put(s_bridge); |
| 851 | s_bridge = NULL; |
| 852 | } |
| 853 | |
| 854 | /* Always return failure here. This is to allow other drivers to bind |
| 855 | * to this pci device. We don't really want to have control over the |
| 856 | * pci device, we only wanted to read as few register values from it. |
| 857 | */ |
| 858 | return -ENODEV; |
| 859 | } |
| 860 | |
| 861 | static struct pci_driver via686a_pci_driver = { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 862 | .name = "via686a", |
| 863 | .id_table = via686a_pci_ids, |
| 864 | .probe = via686a_pci_probe, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | }; |
| 866 | |
| 867 | static int __init sm_via686a_init(void) |
| 868 | { |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 869 | return pci_register_driver(&via686a_pci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | static void __exit sm_via686a_exit(void) |
| 873 | { |
| 874 | pci_unregister_driver(&via686a_pci_driver); |
| 875 | if (s_bridge != NULL) { |
| 876 | i2c_del_driver(&via686a_driver); |
| 877 | pci_dev_put(s_bridge); |
| 878 | s_bridge = NULL; |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, " |
Jean Delvare | be8992c | 2005-05-16 19:00:52 +0200 | [diff] [blame] | 883 | "Mark Studebaker <mdsxyz123@yahoo.com> " |
| 884 | "and Bob Dougherty <bobd@stanford.edu>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | MODULE_DESCRIPTION("VIA 686A Sensor device"); |
| 886 | MODULE_LICENSE("GPL"); |
| 887 | |
| 888 | module_init(sm_via686a_init); |
| 889 | module_exit(sm_via686a_exit); |