/* via686a.c - Part of lm_sensors, Linux kernel modules for hardware monitoring Copyright (c) 1998, 1999,2000 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. */ #include #include #include #include #include #include #include #include #include #include #include #include "version.h" #include "i2c-isa.h" #include "sensors.h" #include #ifndef PCI_DEVICE_ID_VIA_82C686_4 #define PCI_DEVICE_ID_VIA_82C686_4 0x3057 #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,1)) #define init_MUTEX(s) do { *(s) = MUTEX; } while(0) #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,13) #define THIS_MODULE NULL #endif /* 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 /* 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 // // in0: maybe factor should be 1? // // These get us close, but they don't completely agree with what my BIOS says- // they are all a bit low. extern 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 adding 0.5. Or, to avoid fp math, we do (...*10+5)/10. // (note that the *10 is hidden in the /250 rather than /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); } extern 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. // Since we need to scale up by 100 anyway, we don't need to /100 at the end. if (inNum<=1) return (long)(((250000*val+13300)/210240*10+5)/10); // was 210240, 205240 works better else if (inNum==2) return (long)(((250000*val+13300)/157370*10+5)/10); // was 157370, 154370 works better 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 extern 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-09*val^5 - 1.001632e-06*val^4 + 2.457653e-04*val^3 - // 2.967619e-02*val^2 + 2.175144e+00*val - 7.090067e+0. // // Alas, none of the elegant function-fit solutions will work because we aren't allowed // to use floating point in the kernel, 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 (that worked better // than the 5th-order fit for the 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 register values extern inline u8 TEMP_TO_REG(long val) { // No interpolation here. if (val<=-500) return (u8)SENSORS_LIMIT(viaLUT[0],0,255); if (val>=1100) return (u8)SENSORS_LIMIT(viaLUT[160],0,255); // the +5 effectively rounds it off properly, the +50 is because the temps start at -50 return (u8)SENSORS_LIMIT(viaLUT[(val+5)/10+50],0,255); } /* for 8-bit temperature hyst and over registers */ extern inline long TEMP_FROM_REG(u8 val) { // the temp values are already *10, so we don't need to do that. // However, we will round these off to the nearest degree with (...*10+5)/10 return (long)((tempLUT[val]*10+5)/10); } /* for 10-bit temperature readings */ extern 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 uppers bounds by 25, 50 or 75 // (depending on which it's closer to), then /100. temp = ((25*(4-twoBits))*tempLUT[eightBits] + (25*twoBits)*tempLUT[eightBits+1]); // before /100, 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) /* Initial limits */ #define VIA686A_INIT_IN_0 200 #define VIA686A_INIT_IN_1 250 #define VIA686A_INIT_IN_2 330 #define VIA686A_INIT_IN_3 500 #define VIA686A_INIT_IN_4 1200 #define VIA686A_INIT_IN_PERCENTAGE 10 #define VIA686A_INIT_IN_MIN_0 \ (VIA686A_INIT_IN_0 - VIA686A_INIT_IN_0 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MAX_0 \ (VIA686A_INIT_IN_0 + VIA686A_INIT_IN_0 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MIN_1 \ (VIA686A_INIT_IN_1 - VIA686A_INIT_IN_1 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MAX_1 \ (VIA686A_INIT_IN_1 + VIA686A_INIT_IN_1 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MIN_2 \ (VIA686A_INIT_IN_2 - VIA686A_INIT_IN_2 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MAX_2 \ (VIA686A_INIT_IN_2 + VIA686A_INIT_IN_2 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MIN_3 \ (VIA686A_INIT_IN_3 - VIA686A_INIT_IN_3 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MAX_3 \ (VIA686A_INIT_IN_3 + VIA686A_INIT_IN_3 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MIN_4 \ (VIA686A_INIT_IN_4 - VIA686A_INIT_IN_4 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_IN_MAX_4 \ (VIA686A_INIT_IN_4 + VIA686A_INIT_IN_4 * VIA686A_INIT_IN_PERCENTAGE / 100) #define VIA686A_INIT_FAN_MIN 3000 #define VIA686A_INIT_TEMP_OVER 600 #define VIA686A_INIT_TEMP_HYST 500 #ifdef MODULE extern int init_module(void); extern int cleanup_module(void); #endif /* MODULE */ /* This module may seem overly long and complicated. In fact, it is not so bad. Quite a lot of bookkeeping is done. A real driver can often cut some corners. */ /* For each registered 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 */ }; #ifdef MODULE static #else extern #endif int __init sensors_via686a_init(void); static int __init via686a_cleanup(void); 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_command(struct i2c_client *client, unsigned int cmd, void *arg); static void via686a_inc_use(struct i2c_client *client); static void via686a_dec_use(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 int via686a_find(int *address); 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 = { /* name */ "VIA 686A", /* id */ I2C_DRIVERID_VIA686A, /* flags */ I2C_DF_NOTIFY, /* attach_adapter */ &via686a_attach_adapter, /* detach_client */ &via686a_detach_client, /* command */ &via686a_command, /* inc_use */ &via686a_inc_use, /* dec_use */ &via686a_dec_use }; /* Used by via686a_init/cleanup */ static int __initdata via686a_initialized = 0; /* The /proc/sys entries */ /* 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, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_in}, {VIA686A_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_fan}, {VIA686A_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_fan}, {VIA686A_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_TEMP2, "temp2", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_TEMP3, "temp3", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_temp}, {VIA686A_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, &sensors_proc_real, &sensors_sysctl_real, NULL, &via686a_fan_div}, {VIA686A_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &sensors_proc_real, &sensors_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 */ int via686a_attach_adapter(struct i2c_adapter *adapter) { return sensors_detect(adapter, &addr_data, via686a_detect); } /* Locate chip and get correct base address */ int via686a_find(int *address) { struct pci_dev *s_bridge; u16 val; if (!pci_present()) return -ENODEV; if (! (s_bridge = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, NULL))) return -ENODEV; if (PCIBIOS_SUCCESSFUL != pci_read_config_word(s_bridge, VIA686A_BASE_REG, &val)) return -ENODEV; *address = (val & 0xff80); if (PCIBIOS_SUCCESSFUL != pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val)) return -ENODEV; if((*address == 0) || !(val & 0x01)) { printk("via686a.o: sensors not enabled - upgrade BIOS?\n"); return -ENODEV; } return 0; } 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"; /* 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; } if (check_region(address, VIA686A_EXTENT)) { printk("via686a.o: region 0x%x already in use!\n", address); err = -ENODEV; goto ERROR0; } 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, type_name); /* 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 = sensors_register_entry((struct i2c_client *) new_client, type_name, via686a_dir_table_template, THIS_MODULE)) < 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; } int via686a_detach_client(struct i2c_client *client) { int err; sensors_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; } /* No commands defined yet */ int via686a_command(struct i2c_client *client, unsigned int cmd, void *arg) { return 0; } void via686a_inc_use(struct i2c_client *client) { MOD_INC_USE_COUNT; } void via686a_dec_use(struct i2c_client *client) { MOD_DEC_USE_COUNT; } /* Called when we have found a new VIA686A. Set limits, etc. */ void via686a_init_client(struct i2c_client *client) { int i; /* Reset the device */ via686a_write_value(client, VIA686A_REG_CONFIG, 0x80); via686a_write_value(client, VIA686A_REG_IN_MIN(0), IN_TO_REG(VIA686A_INIT_IN_MIN_0, 0)); via686a_write_value(client, VIA686A_REG_IN_MAX(0), IN_TO_REG(VIA686A_INIT_IN_MAX_0, 0)); via686a_write_value(client, VIA686A_REG_IN_MIN(1), IN_TO_REG(VIA686A_INIT_IN_MIN_1, 1)); via686a_write_value(client, VIA686A_REG_IN_MAX(1), IN_TO_REG(VIA686A_INIT_IN_MAX_1, 1)); via686a_write_value(client, VIA686A_REG_IN_MIN(2), IN_TO_REG(VIA686A_INIT_IN_MIN_2, 2)); via686a_write_value(client, VIA686A_REG_IN_MAX(2), IN_TO_REG(VIA686A_INIT_IN_MAX_2, 2)); via686a_write_value(client, VIA686A_REG_IN_MIN(3), IN_TO_REG(VIA686A_INIT_IN_MIN_3, 3)); via686a_write_value(client, VIA686A_REG_IN_MAX(3), IN_TO_REG(VIA686A_INIT_IN_MAX_3, 3)); via686a_write_value(client, VIA686A_REG_IN_MIN(4), IN_TO_REG(VIA686A_INIT_IN_MIN_4, 4)); via686a_write_value(client, VIA686A_REG_IN_MAX(4), IN_TO_REG(VIA686A_INIT_IN_MAX_4, 4)); via686a_write_value(client, VIA686A_REG_FAN_MIN(1), FAN_TO_REG(VIA686A_INIT_FAN_MIN, 2)); via686a_write_value(client, VIA686A_REG_FAN_MIN(2), FAN_TO_REG(VIA686A_INIT_FAN_MIN, 2)); for(i = 1; i <= 3; i++) { via686a_write_value(client, VIA686A_REG_TEMP_OVER(i), TEMP_TO_REG(VIA686A_INIT_TEMP_OVER)); via686a_write_value(client, VIA686A_REG_TEMP_HYST(i), TEMP_TO_REG(VIA686A_INIT_TEMP_HYST)); } /* Start monitoring */ via686a_write_value(client, VIA686A_REG_CONFIG, 0x01); } void via686a_update_client(struct i2c_client *client) { struct via686a_data *data = client->data; int i; down(&data->update_lock); if ((jiffies - data->last_updated > HZ + HZ / 2) || (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. */ 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); } } } int __init sensors_via686a_init(void) { int res, addr; printk("via686a.o version %s (%s)\n", LM_VERSION, LM_DATE); via686a_initialized = 0; if (via686a_find(&addr)) { printk("via686a.o: No Via 686A sensors found.\n"); return -ENODEV; } normal_isa[0] = addr; if ((res = i2c_add_driver(&via686a_driver))) { printk ("via686a.o: Driver registration failed.\n"); via686a_cleanup(); return res; } via686a_initialized++; return 0; } int __init via686a_cleanup(void) { int res; if (via686a_initialized >= 1) { if ((res = i2c_del_driver(&via686a_driver))) { printk("via686a.o: Driver deregistration failed.\n"); return res; } via686a_initialized--; } return 0; } EXPORT_NO_SYMBOLS; #ifdef MODULE MODULE_AUTHOR("Kyösti Mälkki , Mark Studebaker , Bob Dougherty "); MODULE_DESCRIPTION("VIA 686A Sensor device"); int init_module(void) { return sensors_via686a_init(); } int cleanup_module(void) { return via686a_cleanup(); } #endif /* MODULE */