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 /* SMSC47M192 registers */ 40 #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \ 41 (0x50 + (nr) - 6)) 42 #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \ 43 (0x54 + (((nr) - 6) * 2))) 44 #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \ 45 (0x55 + (((nr) - 6) * 2))) 46 static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; 47 static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; 48 static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; 49 #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f) 50 #define SMSC47M192_REG_ALARM1 0x41 51 #define SMSC47M192_REG_ALARM2 0x42 52 #define SMSC47M192_REG_VID 0x47 53 #define SMSC47M192_REG_VID4 0x49 54 #define SMSC47M192_REG_CONFIG 0x40 55 #define SMSC47M192_REG_SFR 0x4f 56 #define SMSC47M192_REG_COMPANY_ID 0x3e 57 #define SMSC47M192_REG_VERSION 0x3f 58 59 /* generalised scaling with integer rounding */ 60 static inline int SCALE(long val, int mul, int div) 61 { 62 if (val < 0) 63 return (val * mul - div / 2) / div; 64 else 65 return (val * mul + div / 2) / div; 66 } 67 68 /* Conversions */ 69 70 /* smsc47m192 internally scales voltage measurements */ 71 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; 72 73 static inline unsigned int IN_FROM_REG(u8 reg, int n) 74 { 75 return SCALE(reg, nom_mv[n], 192); 76 } 77 78 static inline u8 IN_TO_REG(unsigned long val, int n) 79 { 80 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); 81 } 82 83 /* TEMP: 0.001 degC units (-128C to +127C) 84 REG: 1C/bit, two's complement */ 85 static inline s8 TEMP_TO_REG(int val) 86 { 87 return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000); 88 } 89 90 static inline int TEMP_FROM_REG(s8 val) 91 { 92 return val * 1000; 93 } 94 95 struct smsc47m192_data { 96 struct device *hwmon_dev; 97 struct mutex update_lock; 98 char valid; /* !=0 if following fields are valid */ 99 unsigned long last_updated; /* In jiffies */ 100 101 u8 in[8]; /* Register value */ 102 u8 in_max[8]; /* Register value */ 103 u8 in_min[8]; /* Register value */ 104 s8 temp[3]; /* Register value */ 105 s8 temp_max[3]; /* Register value */ 106 s8 temp_min[3]; /* Register value */ 107 s8 temp_offset[3]; /* Register value */ 108 u16 alarms; /* Register encoding, combined */ 109 u8 vid; /* Register encoding, combined */ 110 u8 vrm; 111 }; 112 113 static int smsc47m192_probe(struct i2c_client *client, 114 const struct i2c_device_id *id); 115 static int smsc47m192_detect(struct i2c_client *client, 116 struct i2c_board_info *info); 117 static int smsc47m192_remove(struct i2c_client *client); 118 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); 119 120 static const struct i2c_device_id smsc47m192_id[] = { 121 { "smsc47m192", 0 }, 122 { } 123 }; 124 MODULE_DEVICE_TABLE(i2c, smsc47m192_id); 125 126 static struct i2c_driver smsc47m192_driver = { 127 .class = I2C_CLASS_HWMON, 128 .driver = { 129 .name = "smsc47m192", 130 }, 131 .probe = smsc47m192_probe, 132 .remove = smsc47m192_remove, 133 .id_table = smsc47m192_id, 134 .detect = smsc47m192_detect, 135 .address_list = normal_i2c, 136 }; 137 138 /* Voltages */ 139 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 140 char *buf) 141 { 142 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 143 int nr = sensor_attr->index; 144 struct smsc47m192_data *data = smsc47m192_update_device(dev); 145 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 146 } 147 148 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 149 char *buf) 150 { 151 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 152 int nr = sensor_attr->index; 153 struct smsc47m192_data *data = smsc47m192_update_device(dev); 154 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 155 } 156 157 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 158 char *buf) 159 { 160 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 161 int nr = sensor_attr->index; 162 struct smsc47m192_data *data = smsc47m192_update_device(dev); 163 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 164 } 165 166 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 167 const char *buf, size_t count) 168 { 169 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 170 int nr = sensor_attr->index; 171 struct i2c_client *client = to_i2c_client(dev); 172 struct smsc47m192_data *data = i2c_get_clientdata(client); 173 unsigned long val = simple_strtoul(buf, NULL, 10); 174 175 mutex_lock(&data->update_lock); 176 data->in_min[nr] = IN_TO_REG(val, nr); 177 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), 178 data->in_min[nr]); 179 mutex_unlock(&data->update_lock); 180 return count; 181 } 182 183 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 184 const char *buf, size_t count) 185 { 186 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 187 int nr = sensor_attr->index; 188 struct i2c_client *client = to_i2c_client(dev); 189 struct smsc47m192_data *data = i2c_get_clientdata(client); 190 unsigned long val = simple_strtoul(buf, NULL, 10); 191 192 mutex_lock(&data->update_lock); 193 data->in_max[nr] = IN_TO_REG(val, nr); 194 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), 195 data->in_max[nr]); 196 mutex_unlock(&data->update_lock); 197 return count; 198 } 199 200 #define show_in_offset(offset) \ 201 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 202 show_in, NULL, offset); \ 203 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 204 show_in_min, set_in_min, offset); \ 205 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 206 show_in_max, set_in_max, offset); 207 208 show_in_offset(0) 209 show_in_offset(1) 210 show_in_offset(2) 211 show_in_offset(3) 212 show_in_offset(4) 213 show_in_offset(5) 214 show_in_offset(6) 215 show_in_offset(7) 216 217 /* Temperatures */ 218 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 219 char *buf) 220 { 221 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 222 int nr = sensor_attr->index; 223 struct smsc47m192_data *data = smsc47m192_update_device(dev); 224 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 225 } 226 227 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 228 char *buf) 229 { 230 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 231 int nr = sensor_attr->index; 232 struct smsc47m192_data *data = smsc47m192_update_device(dev); 233 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 234 } 235 236 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 237 char *buf) 238 { 239 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 240 int nr = sensor_attr->index; 241 struct smsc47m192_data *data = smsc47m192_update_device(dev); 242 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 243 } 244 245 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 246 const char *buf, size_t count) 247 { 248 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 249 int nr = sensor_attr->index; 250 struct i2c_client *client = to_i2c_client(dev); 251 struct smsc47m192_data *data = i2c_get_clientdata(client); 252 long val = simple_strtol(buf, NULL, 10); 253 254 mutex_lock(&data->update_lock); 255 data->temp_min[nr] = TEMP_TO_REG(val); 256 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], 257 data->temp_min[nr]); 258 mutex_unlock(&data->update_lock); 259 return count; 260 } 261 262 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 263 const char *buf, size_t count) 264 { 265 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 266 int nr = sensor_attr->index; 267 struct i2c_client *client = to_i2c_client(dev); 268 struct smsc47m192_data *data = i2c_get_clientdata(client); 269 long val = simple_strtol(buf, NULL, 10); 270 271 mutex_lock(&data->update_lock); 272 data->temp_max[nr] = TEMP_TO_REG(val); 273 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], 274 data->temp_max[nr]); 275 mutex_unlock(&data->update_lock); 276 return count; 277 } 278 279 static ssize_t show_temp_offset(struct device *dev, struct device_attribute 280 *attr, char *buf) 281 { 282 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 283 int nr = sensor_attr->index; 284 struct smsc47m192_data *data = smsc47m192_update_device(dev); 285 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); 286 } 287 288 static ssize_t set_temp_offset(struct device *dev, struct device_attribute 289 *attr, const char *buf, size_t count) 290 { 291 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 292 int nr = sensor_attr->index; 293 struct i2c_client *client = to_i2c_client(dev); 294 struct smsc47m192_data *data = i2c_get_clientdata(client); 295 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 296 long val = simple_strtol(buf, NULL, 10); 297 298 mutex_lock(&data->update_lock); 299 data->temp_offset[nr] = TEMP_TO_REG(val); 300 if (nr>1) 301 i2c_smbus_write_byte_data(client, 302 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 303 else if (data->temp_offset[nr] != 0) { 304 /* offset[0] and offset[1] share the same register, 305 SFR bit 4 activates offset[0] */ 306 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 307 (sfr & 0xef) | (nr==0 ? 0x10 : 0)); 308 data->temp_offset[1-nr] = 0; 309 i2c_smbus_write_byte_data(client, 310 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 311 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0)) 312 i2c_smbus_write_byte_data(client, 313 SMSC47M192_REG_TEMP_OFFSET(nr), 0); 314 mutex_unlock(&data->update_lock); 315 return count; 316 } 317 318 #define show_temp_index(index) \ 319 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ 320 show_temp, NULL, index-1); \ 321 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ 322 show_temp_min, set_temp_min, index-1); \ 323 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ 324 show_temp_max, set_temp_max, index-1); \ 325 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ 326 show_temp_offset, set_temp_offset, index-1); 327 328 show_temp_index(1) 329 show_temp_index(2) 330 show_temp_index(3) 331 332 /* VID */ 333 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 334 char *buf) 335 { 336 struct smsc47m192_data *data = smsc47m192_update_device(dev); 337 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 338 } 339 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 340 341 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 342 char *buf) 343 { 344 struct smsc47m192_data *data = dev_get_drvdata(dev); 345 return sprintf(buf, "%d\n", data->vrm); 346 } 347 348 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 349 const char *buf, size_t count) 350 { 351 struct smsc47m192_data *data = dev_get_drvdata(dev); 352 data->vrm = simple_strtoul(buf, NULL, 10); 353 return count; 354 } 355 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 356 357 /* Alarms */ 358 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 359 char *buf) 360 { 361 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 362 int nr = sensor_attr->index; 363 struct smsc47m192_data *data = smsc47m192_update_device(dev); 364 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); 365 } 366 367 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); 368 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); 369 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); 370 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000); 371 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000); 372 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); 373 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); 374 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); 375 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); 376 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); 377 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); 378 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); 379 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); 380 381 static struct attribute *smsc47m192_attributes[] = { 382 &sensor_dev_attr_in0_input.dev_attr.attr, 383 &sensor_dev_attr_in0_min.dev_attr.attr, 384 &sensor_dev_attr_in0_max.dev_attr.attr, 385 &sensor_dev_attr_in0_alarm.dev_attr.attr, 386 &sensor_dev_attr_in1_input.dev_attr.attr, 387 &sensor_dev_attr_in1_min.dev_attr.attr, 388 &sensor_dev_attr_in1_max.dev_attr.attr, 389 &sensor_dev_attr_in1_alarm.dev_attr.attr, 390 &sensor_dev_attr_in2_input.dev_attr.attr, 391 &sensor_dev_attr_in2_min.dev_attr.attr, 392 &sensor_dev_attr_in2_max.dev_attr.attr, 393 &sensor_dev_attr_in2_alarm.dev_attr.attr, 394 &sensor_dev_attr_in3_input.dev_attr.attr, 395 &sensor_dev_attr_in3_min.dev_attr.attr, 396 &sensor_dev_attr_in3_max.dev_attr.attr, 397 &sensor_dev_attr_in3_alarm.dev_attr.attr, 398 &sensor_dev_attr_in5_input.dev_attr.attr, 399 &sensor_dev_attr_in5_min.dev_attr.attr, 400 &sensor_dev_attr_in5_max.dev_attr.attr, 401 &sensor_dev_attr_in5_alarm.dev_attr.attr, 402 &sensor_dev_attr_in6_input.dev_attr.attr, 403 &sensor_dev_attr_in6_min.dev_attr.attr, 404 &sensor_dev_attr_in6_max.dev_attr.attr, 405 &sensor_dev_attr_in6_alarm.dev_attr.attr, 406 &sensor_dev_attr_in7_input.dev_attr.attr, 407 &sensor_dev_attr_in7_min.dev_attr.attr, 408 &sensor_dev_attr_in7_max.dev_attr.attr, 409 &sensor_dev_attr_in7_alarm.dev_attr.attr, 410 411 &sensor_dev_attr_temp1_input.dev_attr.attr, 412 &sensor_dev_attr_temp1_max.dev_attr.attr, 413 &sensor_dev_attr_temp1_min.dev_attr.attr, 414 &sensor_dev_attr_temp1_offset.dev_attr.attr, 415 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 416 &sensor_dev_attr_temp2_input.dev_attr.attr, 417 &sensor_dev_attr_temp2_max.dev_attr.attr, 418 &sensor_dev_attr_temp2_min.dev_attr.attr, 419 &sensor_dev_attr_temp2_offset.dev_attr.attr, 420 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 421 &sensor_dev_attr_temp2_fault.dev_attr.attr, 422 &sensor_dev_attr_temp3_input.dev_attr.attr, 423 &sensor_dev_attr_temp3_max.dev_attr.attr, 424 &sensor_dev_attr_temp3_min.dev_attr.attr, 425 &sensor_dev_attr_temp3_offset.dev_attr.attr, 426 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 427 &sensor_dev_attr_temp3_fault.dev_attr.attr, 428 429 &dev_attr_cpu0_vid.attr, 430 &dev_attr_vrm.attr, 431 NULL 432 }; 433 434 static const struct attribute_group smsc47m192_group = { 435 .attrs = smsc47m192_attributes, 436 }; 437 438 static struct attribute *smsc47m192_attributes_in4[] = { 439 &sensor_dev_attr_in4_input.dev_attr.attr, 440 &sensor_dev_attr_in4_min.dev_attr.attr, 441 &sensor_dev_attr_in4_max.dev_attr.attr, 442 &sensor_dev_attr_in4_alarm.dev_attr.attr, 443 NULL 444 }; 445 446 static const struct attribute_group smsc47m192_group_in4 = { 447 .attrs = smsc47m192_attributes_in4, 448 }; 449 450 static void smsc47m192_init_client(struct i2c_client *client) 451 { 452 int i; 453 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 454 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 455 456 /* select cycle mode (pause 1 sec between updates) */ 457 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 458 (sfr & 0xfd) | 0x02); 459 if (!(config & 0x01)) { 460 /* initialize alarm limits */ 461 for (i=0; i<8; i++) { 462 i2c_smbus_write_byte_data(client, 463 SMSC47M192_REG_IN_MIN(i), 0); 464 i2c_smbus_write_byte_data(client, 465 SMSC47M192_REG_IN_MAX(i), 0xff); 466 } 467 for (i=0; i<3; i++) { 468 i2c_smbus_write_byte_data(client, 469 SMSC47M192_REG_TEMP_MIN[i], 0x80); 470 i2c_smbus_write_byte_data(client, 471 SMSC47M192_REG_TEMP_MAX[i], 0x7f); 472 } 473 474 /* start monitoring */ 475 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, 476 (config & 0xf7) | 0x01); 477 } 478 } 479 480 /* Return 0 if detection is successful, -ENODEV otherwise */ 481 static int smsc47m192_detect(struct i2c_client *client, 482 struct i2c_board_info *info) 483 { 484 struct i2c_adapter *adapter = client->adapter; 485 int version; 486 487 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 488 return -ENODEV; 489 490 /* Detection criteria from sensors_detect script */ 491 version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION); 492 if (i2c_smbus_read_byte_data(client, 493 SMSC47M192_REG_COMPANY_ID) == 0x55 494 && (version & 0xf0) == 0x20 495 && (i2c_smbus_read_byte_data(client, 496 SMSC47M192_REG_VID) & 0x70) == 0x00 497 && (i2c_smbus_read_byte_data(client, 498 SMSC47M192_REG_VID4) & 0xfe) == 0x80) { 499 dev_info(&adapter->dev, 500 "found SMSC47M192 or compatible, " 501 "version 2, stepping A%d\n", version & 0x0f); 502 } else { 503 dev_dbg(&adapter->dev, 504 "SMSC47M192 detection failed at 0x%02x\n", 505 client->addr); 506 return -ENODEV; 507 } 508 509 strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); 510 511 return 0; 512 } 513 514 static int smsc47m192_probe(struct i2c_client *client, 515 const struct i2c_device_id *id) 516 { 517 struct smsc47m192_data *data; 518 int config; 519 int err; 520 521 data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL); 522 if (!data) { 523 err = -ENOMEM; 524 goto exit; 525 } 526 527 i2c_set_clientdata(client, data); 528 data->vrm = vid_which_vrm(); 529 mutex_init(&data->update_lock); 530 531 /* Initialize the SMSC47M192 chip */ 532 smsc47m192_init_client(client); 533 534 /* Register sysfs hooks */ 535 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group))) 536 goto exit_free; 537 538 /* Pin 110 is either in4 (+12V) or VID4 */ 539 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 540 if (!(config & 0x20)) { 541 if ((err = sysfs_create_group(&client->dev.kobj, 542 &smsc47m192_group_in4))) 543 goto exit_remove_files; 544 } 545 546 data->hwmon_dev = hwmon_device_register(&client->dev); 547 if (IS_ERR(data->hwmon_dev)) { 548 err = PTR_ERR(data->hwmon_dev); 549 goto exit_remove_files; 550 } 551 552 return 0; 553 554 exit_remove_files: 555 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 556 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 557 exit_free: 558 kfree(data); 559 exit: 560 return err; 561 } 562 563 static int smsc47m192_remove(struct i2c_client *client) 564 { 565 struct smsc47m192_data *data = i2c_get_clientdata(client); 566 567 hwmon_device_unregister(data->hwmon_dev); 568 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 569 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 570 571 kfree(data); 572 573 return 0; 574 } 575 576 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) 577 { 578 struct i2c_client *client = to_i2c_client(dev); 579 struct smsc47m192_data *data = i2c_get_clientdata(client); 580 int i, config; 581 582 mutex_lock(&data->update_lock); 583 584 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 585 || !data->valid) { 586 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 587 588 dev_dbg(&client->dev, "Starting smsc47m192 update\n"); 589 590 for (i = 0; i <= 7; i++) { 591 data->in[i] = i2c_smbus_read_byte_data(client, 592 SMSC47M192_REG_IN(i)); 593 data->in_min[i] = i2c_smbus_read_byte_data(client, 594 SMSC47M192_REG_IN_MIN(i)); 595 data->in_max[i] = i2c_smbus_read_byte_data(client, 596 SMSC47M192_REG_IN_MAX(i)); 597 } 598 for (i = 0; i < 3; i++) { 599 data->temp[i] = i2c_smbus_read_byte_data(client, 600 SMSC47M192_REG_TEMP[i]); 601 data->temp_max[i] = i2c_smbus_read_byte_data(client, 602 SMSC47M192_REG_TEMP_MAX[i]); 603 data->temp_min[i] = i2c_smbus_read_byte_data(client, 604 SMSC47M192_REG_TEMP_MIN[i]); 605 } 606 for (i = 1; i < 3; i++) 607 data->temp_offset[i] = i2c_smbus_read_byte_data(client, 608 SMSC47M192_REG_TEMP_OFFSET(i)); 609 /* first offset is temp_offset[0] if SFR bit 4 is set, 610 temp_offset[1] otherwise */ 611 if (sfr & 0x10) { 612 data->temp_offset[0] = data->temp_offset[1]; 613 data->temp_offset[1] = 0; 614 } else 615 data->temp_offset[0] = 0; 616 617 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) 618 & 0x0f; 619 config = i2c_smbus_read_byte_data(client, 620 SMSC47M192_REG_CONFIG); 621 if (config & 0x20) 622 data->vid |= (i2c_smbus_read_byte_data(client, 623 SMSC47M192_REG_VID4) & 0x01) << 4; 624 data->alarms = i2c_smbus_read_byte_data(client, 625 SMSC47M192_REG_ALARM1) | 626 (i2c_smbus_read_byte_data(client, 627 SMSC47M192_REG_ALARM2) << 8); 628 629 data->last_updated = jiffies; 630 data->valid = 1; 631 } 632 633 mutex_unlock(&data->update_lock); 634 635 return data; 636 } 637 638 static int __init smsc47m192_init(void) 639 { 640 return i2c_add_driver(&smsc47m192_driver); 641 } 642 643 static void __exit smsc47m192_exit(void) 644 { 645 i2c_del_driver(&smsc47m192_driver); 646 } 647 648 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); 649 MODULE_DESCRIPTION("SMSC47M192 driver"); 650 MODULE_LICENSE("GPL"); 651 652 module_init(smsc47m192_init); 653 module_exit(smsc47m192_exit); 654