1 /* 2 smsc47m192.c - Support for hardware monitoring block of 3 SMSC LPC47M192 and compatible Super I/O chips 4 5 Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de> 6 7 Derived from lm78.c and other chip drivers. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 #include <linux/module.h> 25 #include <linux/init.h> 26 #include <linux/slab.h> 27 #include <linux/jiffies.h> 28 #include <linux/i2c.h> 29 #include <linux/hwmon.h> 30 #include <linux/hwmon-sysfs.h> 31 #include <linux/hwmon-vid.h> 32 #include <linux/err.h> 33 #include <linux/sysfs.h> 34 #include <linux/mutex.h> 35 36 /* Addresses to scan */ 37 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 38 39 /* Insmod parameters */ 40 I2C_CLIENT_INSMOD_1(smsc47m192); 41 42 /* SMSC47M192 registers */ 43 #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \ 44 (0x50 + (nr) - 6)) 45 #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \ 46 (0x54 + (((nr) - 6) * 2))) 47 #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \ 48 (0x55 + (((nr) - 6) * 2))) 49 static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; 50 static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; 51 static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; 52 #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f) 53 #define SMSC47M192_REG_ALARM1 0x41 54 #define SMSC47M192_REG_ALARM2 0x42 55 #define SMSC47M192_REG_VID 0x47 56 #define SMSC47M192_REG_VID4 0x49 57 #define SMSC47M192_REG_CONFIG 0x40 58 #define SMSC47M192_REG_SFR 0x4f 59 #define SMSC47M192_REG_COMPANY_ID 0x3e 60 #define SMSC47M192_REG_VERSION 0x3f 61 62 /* generalised scaling with integer rounding */ 63 static inline int SCALE(long val, int mul, int div) 64 { 65 if (val < 0) 66 return (val * mul - div / 2) / div; 67 else 68 return (val * mul + div / 2) / div; 69 } 70 71 /* Conversions */ 72 73 /* smsc47m192 internally scales voltage measurements */ 74 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; 75 76 static inline unsigned int IN_FROM_REG(u8 reg, int n) 77 { 78 return SCALE(reg, nom_mv[n], 192); 79 } 80 81 static inline u8 IN_TO_REG(unsigned long val, int n) 82 { 83 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); 84 } 85 86 /* TEMP: 0.001 degC units (-128C to +127C) 87 REG: 1C/bit, two's complement */ 88 static inline s8 TEMP_TO_REG(int val) 89 { 90 return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000); 91 } 92 93 static inline int TEMP_FROM_REG(s8 val) 94 { 95 return val * 1000; 96 } 97 98 struct smsc47m192_data { 99 struct i2c_client client; 100 struct device *hwmon_dev; 101 struct mutex update_lock; 102 char valid; /* !=0 if following fields are valid */ 103 unsigned long last_updated; /* In jiffies */ 104 105 u8 in[8]; /* Register value */ 106 u8 in_max[8]; /* Register value */ 107 u8 in_min[8]; /* Register value */ 108 s8 temp[3]; /* Register value */ 109 s8 temp_max[3]; /* Register value */ 110 s8 temp_min[3]; /* Register value */ 111 s8 temp_offset[3]; /* Register value */ 112 u16 alarms; /* Register encoding, combined */ 113 u8 vid; /* Register encoding, combined */ 114 u8 vrm; 115 }; 116 117 static int smsc47m192_attach_adapter(struct i2c_adapter *adapter); 118 static int smsc47m192_detect(struct i2c_adapter *adapter, int address, 119 int kind); 120 static int smsc47m192_detach_client(struct i2c_client *client); 121 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); 122 123 static struct i2c_driver smsc47m192_driver = { 124 .driver = { 125 .name = "smsc47m192", 126 }, 127 .attach_adapter = smsc47m192_attach_adapter, 128 .detach_client = smsc47m192_detach_client, 129 }; 130 131 /* Voltages */ 132 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 133 char *buf) 134 { 135 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 136 int nr = sensor_attr->index; 137 struct smsc47m192_data *data = smsc47m192_update_device(dev); 138 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 139 } 140 141 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 142 char *buf) 143 { 144 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 145 int nr = sensor_attr->index; 146 struct smsc47m192_data *data = smsc47m192_update_device(dev); 147 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 148 } 149 150 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 151 char *buf) 152 { 153 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 154 int nr = sensor_attr->index; 155 struct smsc47m192_data *data = smsc47m192_update_device(dev); 156 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 157 } 158 159 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 160 const char *buf, size_t count) 161 { 162 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 163 int nr = sensor_attr->index; 164 struct i2c_client *client = to_i2c_client(dev); 165 struct smsc47m192_data *data = i2c_get_clientdata(client); 166 unsigned long val = simple_strtoul(buf, NULL, 10); 167 168 mutex_lock(&data->update_lock); 169 data->in_min[nr] = IN_TO_REG(val, nr); 170 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), 171 data->in_min[nr]); 172 mutex_unlock(&data->update_lock); 173 return count; 174 } 175 176 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 177 const char *buf, size_t count) 178 { 179 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 180 int nr = sensor_attr->index; 181 struct i2c_client *client = to_i2c_client(dev); 182 struct smsc47m192_data *data = i2c_get_clientdata(client); 183 unsigned long val = simple_strtoul(buf, NULL, 10); 184 185 mutex_lock(&data->update_lock); 186 data->in_max[nr] = IN_TO_REG(val, nr); 187 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), 188 data->in_max[nr]); 189 mutex_unlock(&data->update_lock); 190 return count; 191 } 192 193 #define show_in_offset(offset) \ 194 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 195 show_in, NULL, offset); \ 196 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 197 show_in_min, set_in_min, offset); \ 198 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 199 show_in_max, set_in_max, offset); 200 201 show_in_offset(0) 202 show_in_offset(1) 203 show_in_offset(2) 204 show_in_offset(3) 205 show_in_offset(4) 206 show_in_offset(5) 207 show_in_offset(6) 208 show_in_offset(7) 209 210 /* Temperatures */ 211 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 212 char *buf) 213 { 214 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 215 int nr = sensor_attr->index; 216 struct smsc47m192_data *data = smsc47m192_update_device(dev); 217 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 218 } 219 220 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 221 char *buf) 222 { 223 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 224 int nr = sensor_attr->index; 225 struct smsc47m192_data *data = smsc47m192_update_device(dev); 226 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 227 } 228 229 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 230 char *buf) 231 { 232 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 233 int nr = sensor_attr->index; 234 struct smsc47m192_data *data = smsc47m192_update_device(dev); 235 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 236 } 237 238 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 239 const char *buf, size_t count) 240 { 241 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 242 int nr = sensor_attr->index; 243 struct i2c_client *client = to_i2c_client(dev); 244 struct smsc47m192_data *data = i2c_get_clientdata(client); 245 long val = simple_strtol(buf, NULL, 10); 246 247 mutex_lock(&data->update_lock); 248 data->temp_min[nr] = TEMP_TO_REG(val); 249 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], 250 data->temp_min[nr]); 251 mutex_unlock(&data->update_lock); 252 return count; 253 } 254 255 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 256 const char *buf, size_t count) 257 { 258 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 259 int nr = sensor_attr->index; 260 struct i2c_client *client = to_i2c_client(dev); 261 struct smsc47m192_data *data = i2c_get_clientdata(client); 262 long val = simple_strtol(buf, NULL, 10); 263 264 mutex_lock(&data->update_lock); 265 data->temp_max[nr] = TEMP_TO_REG(val); 266 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], 267 data->temp_max[nr]); 268 mutex_unlock(&data->update_lock); 269 return count; 270 } 271 272 static ssize_t show_temp_offset(struct device *dev, struct device_attribute 273 *attr, char *buf) 274 { 275 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 276 int nr = sensor_attr->index; 277 struct smsc47m192_data *data = smsc47m192_update_device(dev); 278 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); 279 } 280 281 static ssize_t set_temp_offset(struct device *dev, struct device_attribute 282 *attr, const char *buf, size_t count) 283 { 284 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 285 int nr = sensor_attr->index; 286 struct i2c_client *client = to_i2c_client(dev); 287 struct smsc47m192_data *data = i2c_get_clientdata(client); 288 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 289 long val = simple_strtol(buf, NULL, 10); 290 291 mutex_lock(&data->update_lock); 292 data->temp_offset[nr] = TEMP_TO_REG(val); 293 if (nr>1) 294 i2c_smbus_write_byte_data(client, 295 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 296 else if (data->temp_offset[nr] != 0) { 297 /* offset[0] and offset[1] share the same register, 298 SFR bit 4 activates offset[0] */ 299 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 300 (sfr & 0xef) | (nr==0 ? 0x10 : 0)); 301 data->temp_offset[1-nr] = 0; 302 i2c_smbus_write_byte_data(client, 303 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 304 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0)) 305 i2c_smbus_write_byte_data(client, 306 SMSC47M192_REG_TEMP_OFFSET(nr), 0); 307 mutex_unlock(&data->update_lock); 308 return count; 309 } 310 311 #define show_temp_index(index) \ 312 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ 313 show_temp, NULL, index-1); \ 314 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ 315 show_temp_min, set_temp_min, index-1); \ 316 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ 317 show_temp_max, set_temp_max, index-1); \ 318 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ 319 show_temp_offset, set_temp_offset, index-1); 320 321 show_temp_index(1) 322 show_temp_index(2) 323 show_temp_index(3) 324 325 /* VID */ 326 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 327 char *buf) 328 { 329 struct smsc47m192_data *data = smsc47m192_update_device(dev); 330 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 331 } 332 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 333 334 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 335 char *buf) 336 { 337 struct smsc47m192_data *data = dev_get_drvdata(dev); 338 return sprintf(buf, "%d\n", data->vrm); 339 } 340 341 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 342 const char *buf, size_t count) 343 { 344 struct smsc47m192_data *data = dev_get_drvdata(dev); 345 data->vrm = simple_strtoul(buf, NULL, 10); 346 return count; 347 } 348 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 349 350 /* Alarms */ 351 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 352 char *buf) 353 { 354 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 355 int nr = sensor_attr->index; 356 struct smsc47m192_data *data = smsc47m192_update_device(dev); 357 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); 358 } 359 360 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); 361 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); 362 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); 363 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000); 364 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000); 365 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); 366 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); 367 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); 368 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); 369 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); 370 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); 371 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); 372 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); 373 374 static struct attribute *smsc47m192_attributes[] = { 375 &sensor_dev_attr_in0_input.dev_attr.attr, 376 &sensor_dev_attr_in0_min.dev_attr.attr, 377 &sensor_dev_attr_in0_max.dev_attr.attr, 378 &sensor_dev_attr_in0_alarm.dev_attr.attr, 379 &sensor_dev_attr_in1_input.dev_attr.attr, 380 &sensor_dev_attr_in1_min.dev_attr.attr, 381 &sensor_dev_attr_in1_max.dev_attr.attr, 382 &sensor_dev_attr_in1_alarm.dev_attr.attr, 383 &sensor_dev_attr_in2_input.dev_attr.attr, 384 &sensor_dev_attr_in2_min.dev_attr.attr, 385 &sensor_dev_attr_in2_max.dev_attr.attr, 386 &sensor_dev_attr_in2_alarm.dev_attr.attr, 387 &sensor_dev_attr_in3_input.dev_attr.attr, 388 &sensor_dev_attr_in3_min.dev_attr.attr, 389 &sensor_dev_attr_in3_max.dev_attr.attr, 390 &sensor_dev_attr_in3_alarm.dev_attr.attr, 391 &sensor_dev_attr_in5_input.dev_attr.attr, 392 &sensor_dev_attr_in5_min.dev_attr.attr, 393 &sensor_dev_attr_in5_max.dev_attr.attr, 394 &sensor_dev_attr_in5_alarm.dev_attr.attr, 395 &sensor_dev_attr_in6_input.dev_attr.attr, 396 &sensor_dev_attr_in6_min.dev_attr.attr, 397 &sensor_dev_attr_in6_max.dev_attr.attr, 398 &sensor_dev_attr_in6_alarm.dev_attr.attr, 399 &sensor_dev_attr_in7_input.dev_attr.attr, 400 &sensor_dev_attr_in7_min.dev_attr.attr, 401 &sensor_dev_attr_in7_max.dev_attr.attr, 402 &sensor_dev_attr_in7_alarm.dev_attr.attr, 403 404 &sensor_dev_attr_temp1_input.dev_attr.attr, 405 &sensor_dev_attr_temp1_max.dev_attr.attr, 406 &sensor_dev_attr_temp1_min.dev_attr.attr, 407 &sensor_dev_attr_temp1_offset.dev_attr.attr, 408 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 409 &sensor_dev_attr_temp2_input.dev_attr.attr, 410 &sensor_dev_attr_temp2_max.dev_attr.attr, 411 &sensor_dev_attr_temp2_min.dev_attr.attr, 412 &sensor_dev_attr_temp2_offset.dev_attr.attr, 413 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 414 &sensor_dev_attr_temp2_fault.dev_attr.attr, 415 &sensor_dev_attr_temp3_input.dev_attr.attr, 416 &sensor_dev_attr_temp3_max.dev_attr.attr, 417 &sensor_dev_attr_temp3_min.dev_attr.attr, 418 &sensor_dev_attr_temp3_offset.dev_attr.attr, 419 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 420 &sensor_dev_attr_temp3_fault.dev_attr.attr, 421 422 &dev_attr_cpu0_vid.attr, 423 &dev_attr_vrm.attr, 424 NULL 425 }; 426 427 static const struct attribute_group smsc47m192_group = { 428 .attrs = smsc47m192_attributes, 429 }; 430 431 static struct attribute *smsc47m192_attributes_in4[] = { 432 &sensor_dev_attr_in4_input.dev_attr.attr, 433 &sensor_dev_attr_in4_min.dev_attr.attr, 434 &sensor_dev_attr_in4_max.dev_attr.attr, 435 &sensor_dev_attr_in4_alarm.dev_attr.attr, 436 NULL 437 }; 438 439 static const struct attribute_group smsc47m192_group_in4 = { 440 .attrs = smsc47m192_attributes_in4, 441 }; 442 443 /* This function is called when: 444 * smsc47m192_driver is inserted (when this module is loaded), for each 445 available adapter 446 * when a new adapter is inserted (and smsc47m192_driver is still present) */ 447 static int smsc47m192_attach_adapter(struct i2c_adapter *adapter) 448 { 449 if (!(adapter->class & I2C_CLASS_HWMON)) 450 return 0; 451 return i2c_probe(adapter, &addr_data, smsc47m192_detect); 452 } 453 454 static void smsc47m192_init_client(struct i2c_client *client) 455 { 456 int i; 457 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 458 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 459 460 /* select cycle mode (pause 1 sec between updates) */ 461 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 462 (sfr & 0xfd) | 0x02); 463 if (!(config & 0x01)) { 464 /* initialize alarm limits */ 465 for (i=0; i<8; i++) { 466 i2c_smbus_write_byte_data(client, 467 SMSC47M192_REG_IN_MIN(i), 0); 468 i2c_smbus_write_byte_data(client, 469 SMSC47M192_REG_IN_MAX(i), 0xff); 470 } 471 for (i=0; i<3; i++) { 472 i2c_smbus_write_byte_data(client, 473 SMSC47M192_REG_TEMP_MIN[i], 0x80); 474 i2c_smbus_write_byte_data(client, 475 SMSC47M192_REG_TEMP_MAX[i], 0x7f); 476 } 477 478 /* start monitoring */ 479 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, 480 (config & 0xf7) | 0x01); 481 } 482 } 483 484 /* This function is called by i2c_probe */ 485 static int smsc47m192_detect(struct i2c_adapter *adapter, int address, 486 int kind) 487 { 488 struct i2c_client *client; 489 struct smsc47m192_data *data; 490 int err = 0; 491 int version, config; 492 493 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 494 goto exit; 495 496 if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) { 497 err = -ENOMEM; 498 goto exit; 499 } 500 501 client = &data->client; 502 i2c_set_clientdata(client, data); 503 client->addr = address; 504 client->adapter = adapter; 505 client->driver = &smsc47m192_driver; 506 507 if (kind == 0) 508 kind = smsc47m192; 509 510 /* Detection criteria from sensors_detect script */ 511 if (kind < 0) { 512 if (i2c_smbus_read_byte_data(client, 513 SMSC47M192_REG_COMPANY_ID) == 0x55 514 && ((version = i2c_smbus_read_byte_data(client, 515 SMSC47M192_REG_VERSION)) & 0xf0) == 0x20 516 && (i2c_smbus_read_byte_data(client, 517 SMSC47M192_REG_VID) & 0x70) == 0x00 518 && (i2c_smbus_read_byte_data(client, 519 SMSC47M192_REG_VID4) & 0xfe) == 0x80) { 520 dev_info(&adapter->dev, 521 "found SMSC47M192 or compatible, " 522 "version 2, stepping A%d\n", version & 0x0f); 523 } else { 524 dev_dbg(&adapter->dev, 525 "SMSC47M192 detection failed at 0x%02x\n", 526 address); 527 goto exit_free; 528 } 529 } 530 531 /* Fill in the remaining client fields and put into the global list */ 532 strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE); 533 data->vrm = vid_which_vrm(); 534 mutex_init(&data->update_lock); 535 536 /* Tell the I2C layer a new client has arrived */ 537 if ((err = i2c_attach_client(client))) 538 goto exit_free; 539 540 /* Initialize the SMSC47M192 chip */ 541 smsc47m192_init_client(client); 542 543 /* Register sysfs hooks */ 544 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group))) 545 goto exit_detach; 546 547 /* Pin 110 is either in4 (+12V) or VID4 */ 548 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 549 if (!(config & 0x20)) { 550 if ((err = sysfs_create_group(&client->dev.kobj, 551 &smsc47m192_group_in4))) 552 goto exit_remove_files; 553 } 554 555 data->hwmon_dev = hwmon_device_register(&client->dev); 556 if (IS_ERR(data->hwmon_dev)) { 557 err = PTR_ERR(data->hwmon_dev); 558 goto exit_remove_files; 559 } 560 561 return 0; 562 563 exit_remove_files: 564 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 565 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 566 exit_detach: 567 i2c_detach_client(client); 568 exit_free: 569 kfree(data); 570 exit: 571 return err; 572 } 573 574 static int smsc47m192_detach_client(struct i2c_client *client) 575 { 576 struct smsc47m192_data *data = i2c_get_clientdata(client); 577 int err; 578 579 hwmon_device_unregister(data->hwmon_dev); 580 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 581 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 582 583 if ((err = i2c_detach_client(client))) 584 return err; 585 586 kfree(data); 587 588 return 0; 589 } 590 591 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) 592 { 593 struct i2c_client *client = to_i2c_client(dev); 594 struct smsc47m192_data *data = i2c_get_clientdata(client); 595 int i, config; 596 597 mutex_lock(&data->update_lock); 598 599 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 600 || !data->valid) { 601 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 602 603 dev_dbg(&client->dev, "Starting smsc47m192 update\n"); 604 605 for (i = 0; i <= 7; i++) { 606 data->in[i] = i2c_smbus_read_byte_data(client, 607 SMSC47M192_REG_IN(i)); 608 data->in_min[i] = i2c_smbus_read_byte_data(client, 609 SMSC47M192_REG_IN_MIN(i)); 610 data->in_max[i] = i2c_smbus_read_byte_data(client, 611 SMSC47M192_REG_IN_MAX(i)); 612 } 613 for (i = 0; i < 3; i++) { 614 data->temp[i] = i2c_smbus_read_byte_data(client, 615 SMSC47M192_REG_TEMP[i]); 616 data->temp_max[i] = i2c_smbus_read_byte_data(client, 617 SMSC47M192_REG_TEMP_MAX[i]); 618 data->temp_min[i] = i2c_smbus_read_byte_data(client, 619 SMSC47M192_REG_TEMP_MIN[i]); 620 } 621 for (i = 1; i < 3; i++) 622 data->temp_offset[i] = i2c_smbus_read_byte_data(client, 623 SMSC47M192_REG_TEMP_OFFSET(i)); 624 /* first offset is temp_offset[0] if SFR bit 4 is set, 625 temp_offset[1] otherwise */ 626 if (sfr & 0x10) { 627 data->temp_offset[0] = data->temp_offset[1]; 628 data->temp_offset[1] = 0; 629 } else 630 data->temp_offset[0] = 0; 631 632 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) 633 & 0x0f; 634 config = i2c_smbus_read_byte_data(client, 635 SMSC47M192_REG_CONFIG); 636 if (config & 0x20) 637 data->vid |= (i2c_smbus_read_byte_data(client, 638 SMSC47M192_REG_VID4) & 0x01) << 4; 639 data->alarms = i2c_smbus_read_byte_data(client, 640 SMSC47M192_REG_ALARM1) | 641 (i2c_smbus_read_byte_data(client, 642 SMSC47M192_REG_ALARM2) << 8); 643 644 data->last_updated = jiffies; 645 data->valid = 1; 646 } 647 648 mutex_unlock(&data->update_lock); 649 650 return data; 651 } 652 653 static int __init smsc47m192_init(void) 654 { 655 return i2c_add_driver(&smsc47m192_driver); 656 } 657 658 static void __exit smsc47m192_exit(void) 659 { 660 i2c_del_driver(&smsc47m192_driver); 661 } 662 663 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); 664 MODULE_DESCRIPTION("SMSC47M192 driver"); 665 MODULE_LICENSE("GPL"); 666 667 module_init(smsc47m192_init); 668 module_exit(smsc47m192_exit); 669