/* via686a.c - Part of lm_sensors, Linux kernel modules for hardware monitoring Copyright (c) 1998 - 2002 Frodo Looijaard , Kyösti Mälkki , Mark Studebaker , and Bob Dougherty (Some conversion-factor data were contributed by Jonathan Teh Soon Yew and Alex van Kaam .) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Supports the Via VT82C686A, VT82C686B south bridges. Reports all as a 686A. See doc/chips/via686a for details. Warning - only supports a single device. */ #include #include #include #include #include #include #include #include #include "version.h" /* If force_addr is set to anything different from 0, we forcibly enable the device at the given address. */ static int force_addr = 0; MODULE_PARM(force_addr, "i"); MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); /* Addresses to scan. Note that we can't determine the ISA address until we have initialized our module */ static unsigned short normal_i2c[] = { SENSORS_I2C_END }; static unsigned short normal_i2c_range[] = { SENSORS_I2C_END }; static unsigned int normal_isa[] = { 0x0000, SENSORS_ISA_END }; static unsigned int normal_isa_range[] = { SENSORS_ISA_END }; /* Insmod parameters */ SENSORS_INSMOD_1(via686a); /* The Via 686a southbridge has a LM78-like chip integrated on the same IC. This driver is a customized copy of lm78.c */ /* Many VIA686A constants specified below */ /* Length of ISA address segment */ #define VIA686A_EXTENT 0x80 #define VIA686A_BASE_REG 0x70 #define VIA686A_ENABLE_REG 0x74 /* The VIA686A registers */ /* ins numbered 0-4 */ #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) #define VIA686A_REG_IN(nr) (0x22 + (nr)) /* fans numbered 1-2 */ #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) #define VIA686A_REG_FAN(nr) (0x28 + (nr)) // the following values are as speced by VIA: static const u8 regtemp[] = { 0x20, 0x21, 0x1f }; static const u8 regover[] = { 0x39, 0x3d, 0x1d }; static const u8 reghyst[] = { 0x3a, 0x3e, 0x1e }; /* temps numbered 1-3 */ #define VIA686A_REG_TEMP(nr) (regtemp[(nr) - 1]) #define VIA686A_REG_TEMP_OVER(nr) (regover[(nr) - 1]) #define VIA686A_REG_TEMP_HYST(nr) (reghyst[(nr) - 1]) #define VIA686A_REG_TEMP_LOW1 0x4b // bits 7-6 #define VIA686A_REG_TEMP_LOW23 0x49 // 2 = bits 5-4, 3 = bits 7-6 #define VIA686A_REG_ALARM1 0x41 #define VIA686A_REG_ALARM2 0x42 #define VIA686A_REG_FANDIV 0x47 #define VIA686A_REG_CONFIG 0x40 // The following register sets temp interrupt mode (bits 1-0 for temp1, // 3-2 for temp2, 5-4 for temp3). Modes are: // 00 interrupt stays as long as value is out-of-range // 01 interrupt is cleared once register is read (default) // 10 comparator mode- like 00, but ignores hysteresis // 11 same as 00 #define VIA686A_REG_TEMP_MODE 0x4b // We'll just assume that you want to set all 3 simultaneously: #define VIA686A_TEMP_MODE_MASK 0x3F #define VIA686A_TEMP_MODE_CONTINUOUS (0x00) /* Conversions. Rounding and limit checking is only done on the TO_REG variants. */ /********* VOLTAGE CONVERSIONS (Bob Dougherty) ********/ // From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): // voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp // voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V // voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V // voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V // voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V // in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; // That is: // volts = (25*regVal+133)*factor // regVal = (volts/factor-133)/25 // (These conversions were contributed by Jonathan Teh Soon Yew // ) // // These get us close, but they don't completely agree with what my BIOS // says- they are all a bit low. But, it all we have to go on... static inline u8 IN_TO_REG(long val, int inNum) { // to avoid floating point, we multiply everything by 100. // val is guaranteed to be positive, so we can achieve the effect of // rounding by (...*10+5)/10. Note that the *10 is hidden in the // /250 (which should really be /2500). // At the end, we need to /100 because we *100 everything and we need // to /10 because of the rounding thing, so we /1000. if (inNum <= 1) return (u8) SENSORS_LIMIT(((val * 210240 - 13300) / 250 + 5) / 1000, 0, 255); else if (inNum == 2) return (u8) SENSORS_LIMIT(((val * 157370 - 13300) / 250 + 5) / 1000, 0, 255); else if (inNum == 3) return (u8) SENSORS_LIMIT(((val * 101080 - 13300) / 250 + 5) / 1000, 0, 255); else return (u8) SENSORS_LIMIT(((val * 41714 - 13300) / 250 + 5) / 1000, 0, 255); } static inline long IN_FROM_REG(u8 val, int inNum) { // to avoid floating point, we multiply everything by 100. // val is guaranteed to be positive, so we can achieve the effect of // rounding by adding 0.5. Or, to avoid fp math, we do (...*10+5)/10. // We need to scale with *100 anyway, so no need to /100 at the end. if (inNum <= 1) return (long) (((250000 * val + 13300) / 210240 * 10 + 5) /10); else if (inNum == 2) return (long) (((250000 * val + 13300) / 157370 * 10 + 5) /10); else if (inNum == 3) return (long) (((250000 * val + 13300) / 101080 * 10 + 5) /10); else return (long) (((250000 * val + 13300) / 41714 * 10 + 5) /10); } /********* FAN RPM CONVERSIONS ********/ // Higher register values = slower fans (the fan's strobe gates a counter). // But this chip saturates back at 0, not at 255 like all the other chips. // So, 0 means 0 RPM static inline u8 FAN_TO_REG(long rpm, int div) { if (rpm == 0) return 0; rpm = SENSORS_LIMIT(rpm, 1, 1000000); return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); } #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) /******** TEMP CONVERSIONS (Bob Dougherty) *********/ // linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) // if(temp<169) // return double(temp)*0.427-32.08; // else if(temp>=169 && temp<=202) // return double(temp)*0.582-58.16; // else // return double(temp)*0.924-127.33; // // A fifth-order polynomial fits the unofficial data (provided by Alex van // Kaam ) a bit better. It also give more reasonable // numbers on my machine (ie. they agree with what my BIOS tells me). // Here's the fifth-order fit to the 8-bit data: // temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - // 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. // // (2000-10-25- RFD: thanks to Uwe Andersen for // finding my typos in this formula!) // // Alas, none of the elegant function-fit solutions will work because we // aren't allowed to use floating point in the kernel and doing it with // integers doesn't rpovide enough precision. So we'll do boring old // look-up table stuff. The unofficial data (see below) have effectively // 7-bit resolution (they are rounded to the nearest degree). I'm assuming // that the transfer function of the device is monotonic and smooth, so a // smooth function fit to the data will allow us to get better precision. // I used the 5th-order poly fit described above and solved for // VIA register values 0-255. I *10 before rounding, so we get tenth-degree // precision. (I could have done all 1024 values for our 10-bit readings, // but the function is very linear in the useful range (0-80 deg C), so // we'll just use linear interpolation for 10-bit readings.) So, tempLUT // is the temp at via register values 0-255: static const long tempLUT[] = { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 }; /* the original LUT values from Alex van Kaam (for via register values 12-240): {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, -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, 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, 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, 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, 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, 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, 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; */ // Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed // an extra term for a good fit to these inverse data!) and then // solving for each temp value from -50 to 110 (the useable range for // this chip). Here's the fit: // viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 // - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) // Note that n=161: static const u8 viaLUT[] = { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 239, 240 }; /* Converting temps to (8-bit) hyst and over registers */ // No interpolation here. Just check the limits and go. // The +5 effectively rounds off properly and the +50 is because // the temps start at -50 static inline u8 TEMP_TO_REG(long val) { return (u8) SENSORS_LIMIT(viaLUT[((val <= -500) ? 0 : (val >= 1100) ? 160 : ((val + 5) / 10 + 50))], 0, 255); } /* for 8-bit temperature hyst and over registers */ // The temp values are already *10, so we don't need to do that. // But we _will_ round these off to the nearest degree with (...*10+5)/10 #define TEMP_FROM_REG(val) ((tempLUT[(val)]*10+5)/10) /* for 10-bit temperature readings */ // You might _think_ this is too long to inline, but's it's really only // called once... static inline long TEMP_FROM_REG10(u16 val) { // the temp values are already *10, so we don't need to do that. long temp; u16 eightBits = val >> 2; u16 twoBits = val & 3; // handle the extremes first (they won't interpolate well! ;-) if (val == 0) return (long) tempLUT[0]; if (val == 1023) return (long) tempLUT[255]; if (twoBits == 0) return (long) tempLUT[eightBits]; else { // do some interpolation by multipying the lower and upper // bounds by 25, 50 or 75, then /100. temp = ((25 * (4 - twoBits)) * tempLUT[eightBits] + (25 * twoBits) * tempLUT[eightBits + 1]); // increase the magnitude by 50 to achieve rounding. if (temp > 0) temp += 50; else temp -= 50; return (temp / 100); } } #define ALARMS_FROM_REG(val) (val) #define DIV_FROM_REG(val) (1 << (val)) #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) /* For the VIA686A, we need to keep some data in memory. That data is pointed to by via686a_list[NR]->data. The structure itself is dynamically allocated, at the same time when a new via686a client is allocated. */ struct via686a_data { struct semaphore lock; int sysctl_id; struct semaphore update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ u8 in[5]; /* Register value */ u8 in_max[5]; /* Register value */ u8 in_min[5]; /* Register value */ u8 fan[2]; /* Register value */ u8 fan_min[2]; /* Register value */ u16 temp[3]; /* Register value 10 bit */ u8 temp_over[3]; /* Register value */ u8 temp_hyst[3]; /* Register value */ u8 fan_div[2]; /* Register encoding, shifted right */ u16 alarms; /* Register encoding, combined */ }; static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ static int via686a_attach_adapter(struct i2c_adapter *adapter); static int via686a_detect(struct i2c_adapter *adapter, int address, unsigned short flags, int kind); static int via686a_detach_client(struct i2c_client *client); static int via686a_read_value(struct i2c_client *client, u8 register); static void via686a_write_value(struct i2c_client *client, u8 register, u8 value); static void via686a_update_client(struct i2c_client *client); static void via686a_init_client(struct i2c_client *client); static void via686a_in(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results); static void via686a_fan(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results); static void via686a_temp(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results); static void via686a_alarms(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results); static void via686a_fan_div(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results); static int via686a_id = 0; /* The driver. I choose to use type i2c_driver, as at is identical to both smbus_driver and isa_driver, and clients could be of either kind */ static struct i2c_driver via686a_driver = { .owner = THIS_MODULE, .name = "VIA 686A", .id = I2C_DRIVERID_VIA686A, .flags = I2C_DF_NOTIFY, .attach_adapter = via686a_attach_adapter, .detach_client = via686a_detach_client, }; /* The /proc/sys entries */ /* -- SENSORS SYSCTL START -- */ #define VIA686A_SYSCTL_IN0 1000 #define VIA686A_SYSCTL_IN1 1001 #define VIA686A_SYSCTL_IN2 1002 #define VIA686A_SYSCTL_IN3 1003 #define VIA686A_SYSCTL_IN4 1004 #define VIA686A_SYSCTL_FAN1 1101 #define VIA686A_SYSCTL_FAN2 1102 #define VIA686A_SYSCTL_TEMP 1200 #define VIA686A_SYSCTL_TEMP2 1201 #define VIA686A_SYSCTL_TEMP3 1202 #define VIA686A_SYSCTL_FAN_DIV 2000 #define VIA686A_SYSCTL_ALARMS 2001 #define VIA686A_ALARM_IN0 0x01 #define VIA686A_ALARM_IN1 0x02 #define VIA686A_ALARM_IN2 0x04 #define VIA686A_ALARM_IN3 0x08 #define VIA686A_ALARM_TEMP 0x10 #define VIA686A_ALARM_FAN1 0x40 #define VIA686A_ALARM_FAN2 0x80 #define VIA686A_ALARM_IN4 0x100 #define VIA686A_ALARM_TEMP2 0x800 #define VIA686A_ALARM_CHAS 0x1000 #define VIA686A_ALARM_TEMP3 0x8000 /* -- SENSORS SYSCTL END -- */ /* These files are created for each detected VIA686A. This is just a template; though at first sight, you might think we could use a statically allocated list, we need some way to get back to the parent - which is done through one of the 'extra' fields which are initialized when a new copy is allocated. */ static ctl_table via686a_dir_table_template[] = { {VIA686A_SYSCTL_IN0, "in0", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_fan}, {VIA686A_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_fan}, {VIA686A_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_TEMP2, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_TEMP3, "temp3", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_fan_div}, {VIA686A_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real, &i2c_sysctl_real, NULL, &via686a_alarms}, {0} }; static inline int via686a_read_value(struct i2c_client *client, u8 reg) { return (inb_p(client->addr + reg)); } static inline void via686a_write_value(struct i2c_client *client, u8 reg, u8 value) { outb_p(value, client->addr + reg); } /* This is called when the module is loaded */ static int via686a_attach_adapter(struct i2c_adapter *adapter) { return i2c_detect(adapter, &addr_data, via686a_detect); } int via686a_detect(struct i2c_adapter *adapter, int address, unsigned short flags, int kind) { int i; struct i2c_client *new_client; struct via686a_data *data; int err = 0; const char *type_name = "via686a"; u16 val; /* Make sure we are probing the ISA bus!! */ if (!i2c_is_isa_adapter(adapter)) { printk ("via686a.o: via686a_detect called for an I2C bus adapter?!?\n"); return 0; } /* 8231 requires multiple of 256, we enforce that on 686 as well */ if(force_addr) address = force_addr & 0xFF00; if (check_region(address, VIA686A_EXTENT)) { printk("via686a.o: region 0x%x already in use!\n", address); return -ENODEV; } if(force_addr) { printk("via686a.o: forcing ISA address 0x%04X\n", address); if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, VIA686A_BASE_REG, address)) return -ENODEV; } if (PCIBIOS_SUCCESSFUL != pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) return -ENODEV; if (!(val & 0x0001)) { printk("via686a.o: enabling sensors\n"); if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, VIA686A_ENABLE_REG, val | 0x0001)) return -ENODEV; } if (!(new_client = kmalloc(sizeof(struct i2c_client) + sizeof(struct via686a_data), GFP_KERNEL))) { err = -ENOMEM; goto ERROR0; } data = (struct via686a_data *) (new_client + 1); new_client->addr = address; init_MUTEX(&data->lock); new_client->data = data; new_client->adapter = adapter; new_client->driver = &via686a_driver; new_client->flags = 0; /* Reserve the ISA region */ request_region(address, VIA686A_EXTENT, "via686a-sensors"); /* Fill in the remaining client fields and put into the global list */ strcpy(new_client->name, "Via 686A Integrated Sensors"); new_client->id = via686a_id++; data->valid = 0; init_MUTEX(&data->update_lock); /* Tell the I2C layer a new client has arrived */ if ((err = i2c_attach_client(new_client))) goto ERROR3; /* Register a new directory entry with module sensors */ if ((i = i2c_register_entry((struct i2c_client *) new_client, type_name, via686a_dir_table_template)) < 0) { err = i; goto ERROR4; } data->sysctl_id = i; /* Initialize the VIA686A chip */ via686a_init_client(new_client); return 0; ERROR4: i2c_detach_client(new_client); ERROR3: release_region(address, VIA686A_EXTENT); kfree(new_client); ERROR0: return err; } static int via686a_detach_client(struct i2c_client *client) { int err; i2c_deregister_entry(((struct via686a_data *) (client->data))->sysctl_id); if ((err = i2c_detach_client(client))) { printk ("via686a.o: Client deregistration failed, client not detached.\n"); return err; } release_region(client->addr, VIA686A_EXTENT); kfree(client); return 0; } /* Called when we have found a new VIA686A. */ static void via686a_init_client(struct i2c_client *client) { u8 reg; /* Start monitoring */ reg = via686a_read_value(client, VIA686A_REG_CONFIG); via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F); /* Configure temp interrupt mode for continuous-interrupt operation */ via686a_write_value(client, VIA686A_REG_TEMP_MODE, via686a_read_value(client, VIA686A_REG_TEMP_MODE) & !(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS)); } static void via686a_update_client(struct i2c_client *client) { struct via686a_data *data = client->data; int i; down(&data->update_lock); if (time_after(jiffies - data->last_updated, HZ + HZ / 2) || time_before(jiffies, data->last_updated) || !data->valid) { for (i = 0; i <= 4; i++) { data->in[i] = via686a_read_value(client, VIA686A_REG_IN(i)); data->in_min[i] = via686a_read_value(client, VIA686A_REG_IN_MIN (i)); data->in_max[i] = via686a_read_value(client, VIA686A_REG_IN_MAX(i)); } for (i = 1; i <= 2; i++) { data->fan[i - 1] = via686a_read_value(client, VIA686A_REG_FAN(i)); data->fan_min[i - 1] = via686a_read_value(client, VIA686A_REG_FAN_MIN(i)); } for (i = 1; i <= 3; i++) { data->temp[i - 1] = via686a_read_value(client, VIA686A_REG_TEMP(i)) << 2; data->temp_over[i - 1] = via686a_read_value(client, VIA686A_REG_TEMP_OVER(i)); data->temp_hyst[i - 1] = via686a_read_value(client, VIA686A_REG_TEMP_HYST(i)); } /* add in lower 2 bits temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 */ data->temp[0] |= (via686a_read_value(client, VIA686A_REG_TEMP_LOW1) & 0xc0) >> 6; data->temp[1] |= (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 0x30) >> 4; data->temp[2] |= (via686a_read_value(client, VIA686A_REG_TEMP_LOW23) & 0xc0) >> 6; i = via686a_read_value(client, VIA686A_REG_FANDIV); data->fan_div[0] = (i >> 4) & 0x03; data->fan_div[1] = i >> 6; data->alarms = via686a_read_value(client, VIA686A_REG_ALARM1) | (via686a_read_value(client, VIA686A_REG_ALARM2) << 8); data->last_updated = jiffies; data->valid = 1; } up(&data->update_lock); } /* The next few functions are the call-back functions of the /proc/sys and sysctl files. Which function is used is defined in the ctl_table in the extra1 field. Each function must return the magnitude (power of 10 to divide the date with) if it is called with operation==SENSORS_PROC_REAL_INFO. It must put a maximum of *nrels elements in results reflecting the data of this file, and set *nrels to the number it actually put in it, if operation== SENSORS_PROC_REAL_READ. Finally, it must get upto *nrels elements from results and write them to the chip, if operations==SENSORS_PROC_REAL_WRITE. Note that on SENSORS_PROC_REAL_READ, I do not check whether results is large enough (by checking the incoming value of *nrels). This is not very good practice, but as long as you put less than about 5 values in results, you can assume it is large enough. */ static void via686a_in(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results) { struct via686a_data *data = client->data; int nr = ctl_name - VIA686A_SYSCTL_IN0; if (operation == SENSORS_PROC_REAL_INFO) *nrels_mag = 2; else if (operation == SENSORS_PROC_REAL_READ) { via686a_update_client(client); results[0] = IN_FROM_REG(data->in_min[nr], nr); results[1] = IN_FROM_REG(data->in_max[nr], nr); results[2] = IN_FROM_REG(data->in[nr], nr); *nrels_mag = 3; } else if (operation == SENSORS_PROC_REAL_WRITE) { if (*nrels_mag >= 1) { data->in_min[nr] = IN_TO_REG(results[0], nr); via686a_write_value(client, VIA686A_REG_IN_MIN(nr), data->in_min[nr]); } if (*nrels_mag >= 2) { data->in_max[nr] = IN_TO_REG(results[1], nr); via686a_write_value(client, VIA686A_REG_IN_MAX(nr), data->in_max[nr]); } } } void via686a_fan(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results) { struct via686a_data *data = client->data; int nr = ctl_name - VIA686A_SYSCTL_FAN1 + 1; if (operation == SENSORS_PROC_REAL_INFO) *nrels_mag = 0; else if (operation == SENSORS_PROC_REAL_READ) { via686a_update_client(client); results[0] = FAN_FROM_REG(data->fan_min[nr - 1], DIV_FROM_REG(data->fan_div [nr - 1])); results[1] = FAN_FROM_REG(data->fan[nr - 1], DIV_FROM_REG(data->fan_div[nr - 1])); *nrels_mag = 2; } else if (operation == SENSORS_PROC_REAL_WRITE) { if (*nrels_mag >= 1) { data->fan_min[nr - 1] = FAN_TO_REG(results[0], DIV_FROM_REG(data-> fan_div[nr -1])); via686a_write_value(client, VIA686A_REG_FAN_MIN(nr), data->fan_min[nr - 1]); } } } void via686a_temp(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results) { struct via686a_data *data = client->data; int nr = ctl_name - VIA686A_SYSCTL_TEMP; if (operation == SENSORS_PROC_REAL_INFO) *nrels_mag = 1; else if (operation == SENSORS_PROC_REAL_READ) { via686a_update_client(client); results[0] = TEMP_FROM_REG(data->temp_over[nr]); results[1] = TEMP_FROM_REG(data->temp_hyst[nr]); results[2] = TEMP_FROM_REG10(data->temp[nr]); *nrels_mag = 3; } else if (operation == SENSORS_PROC_REAL_WRITE) { if (*nrels_mag >= 1) { data->temp_over[nr] = TEMP_TO_REG(results[0]); via686a_write_value(client, VIA686A_REG_TEMP_OVER(nr + 1), data->temp_over[nr]); } if (*nrels_mag >= 2) { data->temp_hyst[nr] = TEMP_TO_REG(results[1]); via686a_write_value(client, VIA686A_REG_TEMP_HYST(nr + 1), data->temp_hyst[nr]); } } } void via686a_alarms(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results) { struct via686a_data *data = client->data; if (operation == SENSORS_PROC_REAL_INFO) *nrels_mag = 0; else if (operation == SENSORS_PROC_REAL_READ) { via686a_update_client(client); results[0] = ALARMS_FROM_REG(data->alarms); *nrels_mag = 1; } } void via686a_fan_div(struct i2c_client *client, int operation, int ctl_name, int *nrels_mag, long *results) { struct via686a_data *data = client->data; int old; if (operation == SENSORS_PROC_REAL_INFO) *nrels_mag = 0; else if (operation == SENSORS_PROC_REAL_READ) { via686a_update_client(client); results[0] = DIV_FROM_REG(data->fan_div[0]); results[1] = DIV_FROM_REG(data->fan_div[1]); *nrels_mag = 2; } else if (operation == SENSORS_PROC_REAL_WRITE) { old = via686a_read_value(client, VIA686A_REG_FANDIV); if (*nrels_mag >= 2) { data->fan_div[1] = DIV_TO_REG(results[1]); old = (old & 0x3f) | (data->fan_div[1] << 6); } if (*nrels_mag >= 1) { data->fan_div[0] = DIV_TO_REG(results[0]); old = (old & 0xcf) | (data->fan_div[0] << 4); via686a_write_value(client, VIA686A_REG_FANDIV, old); } } } static struct pci_device_id via686a_pci_ids[] __devinitdata = { {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, { 0, } }; static int __devinit via686a_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { u16 val; int addr = 0; if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VIA686A_BASE_REG, &val)) return -ENODEV; addr = val & ~(VIA686A_EXTENT - 1); if (addr == 0 && force_addr == 0) { printk("via686a.o: base address not set - upgrade BIOS or use force_addr=0xaddr\n"); return -ENODEV; } if (force_addr) addr = force_addr; /* so detect will get called */ if (!addr) { printk("via686a.o: No Via 686A sensors found.\n"); return -ENODEV; } normal_isa[0] = addr; s_bridge = dev; return i2c_add_driver(&via686a_driver); } static void __devexit via686a_pci_remove(struct pci_dev *dev) { i2c_del_driver(&via686a_driver); } static struct pci_driver via686a_pci_driver = { .name = "via686a", .id_table = via686a_pci_ids, .probe = via686a_pci_probe, .remove = __devexit_p(via686a_pci_remove), }; static int __init sm_via686a_init(void) { printk("via686a.o version %s (%s)\n", LM_VERSION, LM_DATE); return pci_module_init(&via686a_pci_driver); } static void __exit sm_via686a_exit(void) { pci_unregister_driver(&via686a_pci_driver); } MODULE_AUTHOR("Kyösti Mälkki , " "Mark Studebaker " "and Bob Dougherty "); MODULE_DESCRIPTION("VIA 686A Sensor device"); MODULE_LICENSE("GPL"); module_init(sm_via686a_init); module_exit(sm_via686a_exit);