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 device *hwmon_dev; 100 struct mutex update_lock; 101 char valid; /* !=0 if following fields are valid */ 102 unsigned long last_updated; /* In jiffies */ 103 104 u8 in[8]; /* Register value */ 105 u8 in_max[8]; /* Register value */ 106 u8 in_min[8]; /* Register value */ 107 s8 temp[3]; /* Register value */ 108 s8 temp_max[3]; /* Register value */ 109 s8 temp_min[3]; /* Register value */ 110 s8 temp_offset[3]; /* Register value */ 111 u16 alarms; /* Register encoding, combined */ 112 u8 vid; /* Register encoding, combined */ 113 u8 vrm; 114 }; 115 116 static int smsc47m192_probe(struct i2c_client *client, 117 const struct i2c_device_id *id); 118 static int smsc47m192_detect(struct i2c_client *client, int kind, 119 struct i2c_board_info *info); 120 static int smsc47m192_remove(struct i2c_client *client); 121 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); 122 123 static const struct i2c_device_id smsc47m192_id[] = { 124 { "smsc47m192", smsc47m192 }, 125 { } 126 }; 127 MODULE_DEVICE_TABLE(i2c, smsc47m192_id); 128 129 static struct i2c_driver smsc47m192_driver = { 130 .class = I2C_CLASS_HWMON, 131 .driver = { 132 .name = "smsc47m192", 133 }, 134 .probe = smsc47m192_probe, 135 .remove = smsc47m192_remove, 136 .id_table = smsc47m192_id, 137 .detect = smsc47m192_detect, 138 .address_data = &addr_data, 139 }; 140 141 /* Voltages */ 142 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 143 char *buf) 144 { 145 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 146 int nr = sensor_attr->index; 147 struct smsc47m192_data *data = smsc47m192_update_device(dev); 148 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 149 } 150 151 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 152 char *buf) 153 { 154 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 155 int nr = sensor_attr->index; 156 struct smsc47m192_data *data = smsc47m192_update_device(dev); 157 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 158 } 159 160 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 161 char *buf) 162 { 163 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 164 int nr = sensor_attr->index; 165 struct smsc47m192_data *data = smsc47m192_update_device(dev); 166 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 167 } 168 169 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 170 const char *buf, size_t count) 171 { 172 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 173 int nr = sensor_attr->index; 174 struct i2c_client *client = to_i2c_client(dev); 175 struct smsc47m192_data *data = i2c_get_clientdata(client); 176 unsigned long val = simple_strtoul(buf, NULL, 10); 177 178 mutex_lock(&data->update_lock); 179 data->in_min[nr] = IN_TO_REG(val, nr); 180 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), 181 data->in_min[nr]); 182 mutex_unlock(&data->update_lock); 183 return count; 184 } 185 186 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 187 const char *buf, size_t count) 188 { 189 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 190 int nr = sensor_attr->index; 191 struct i2c_client *client = to_i2c_client(dev); 192 struct smsc47m192_data *data = i2c_get_clientdata(client); 193 unsigned long val = simple_strtoul(buf, NULL, 10); 194 195 mutex_lock(&data->update_lock); 196 data->in_max[nr] = IN_TO_REG(val, nr); 197 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), 198 data->in_max[nr]); 199 mutex_unlock(&data->update_lock); 200 return count; 201 } 202 203 #define show_in_offset(offset) \ 204 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 205 show_in, NULL, offset); \ 206 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 207 show_in_min, set_in_min, offset); \ 208 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 209 show_in_max, set_in_max, offset); 210 211 show_in_offset(0) 212 show_in_offset(1) 213 show_in_offset(2) 214 show_in_offset(3) 215 show_in_offset(4) 216 show_in_offset(5) 217 show_in_offset(6) 218 show_in_offset(7) 219 220 /* Temperatures */ 221 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 222 char *buf) 223 { 224 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 225 int nr = sensor_attr->index; 226 struct smsc47m192_data *data = smsc47m192_update_device(dev); 227 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 228 } 229 230 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 231 char *buf) 232 { 233 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 234 int nr = sensor_attr->index; 235 struct smsc47m192_data *data = smsc47m192_update_device(dev); 236 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 237 } 238 239 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 240 char *buf) 241 { 242 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 243 int nr = sensor_attr->index; 244 struct smsc47m192_data *data = smsc47m192_update_device(dev); 245 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 246 } 247 248 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 249 const char *buf, size_t count) 250 { 251 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 252 int nr = sensor_attr->index; 253 struct i2c_client *client = to_i2c_client(dev); 254 struct smsc47m192_data *data = i2c_get_clientdata(client); 255 long val = simple_strtol(buf, NULL, 10); 256 257 mutex_lock(&data->update_lock); 258 data->temp_min[nr] = TEMP_TO_REG(val); 259 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], 260 data->temp_min[nr]); 261 mutex_unlock(&data->update_lock); 262 return count; 263 } 264 265 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 266 const char *buf, size_t count) 267 { 268 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 269 int nr = sensor_attr->index; 270 struct i2c_client *client = to_i2c_client(dev); 271 struct smsc47m192_data *data = i2c_get_clientdata(client); 272 long val = simple_strtol(buf, NULL, 10); 273 274 mutex_lock(&data->update_lock); 275 data->temp_max[nr] = TEMP_TO_REG(val); 276 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], 277 data->temp_max[nr]); 278 mutex_unlock(&data->update_lock); 279 return count; 280 } 281 282 static ssize_t show_temp_offset(struct device *dev, struct device_attribute 283 *attr, char *buf) 284 { 285 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 286 int nr = sensor_attr->index; 287 struct smsc47m192_data *data = smsc47m192_update_device(dev); 288 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); 289 } 290 291 static ssize_t set_temp_offset(struct device *dev, struct device_attribute 292 *attr, const char *buf, size_t count) 293 { 294 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 295 int nr = sensor_attr->index; 296 struct i2c_client *client = to_i2c_client(dev); 297 struct smsc47m192_data *data = i2c_get_clientdata(client); 298 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 299 long val = simple_strtol(buf, NULL, 10); 300 301 mutex_lock(&data->update_lock); 302 data->temp_offset[nr] = TEMP_TO_REG(val); 303 if (nr>1) 304 i2c_smbus_write_byte_data(client, 305 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 306 else if (data->temp_offset[nr] != 0) { 307 /* offset[0] and offset[1] share the same register, 308 SFR bit 4 activates offset[0] */ 309 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 310 (sfr & 0xef) | (nr==0 ? 0x10 : 0)); 311 data->temp_offset[1-nr] = 0; 312 i2c_smbus_write_byte_data(client, 313 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 314 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0)) 315 i2c_smbus_write_byte_data(client, 316 SMSC47M192_REG_TEMP_OFFSET(nr), 0); 317 mutex_unlock(&data->update_lock); 318 return count; 319 } 320 321 #define show_temp_index(index) \ 322 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ 323 show_temp, NULL, index-1); \ 324 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ 325 show_temp_min, set_temp_min, index-1); \ 326 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ 327 show_temp_max, set_temp_max, index-1); \ 328 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ 329 show_temp_offset, set_temp_offset, index-1); 330 331 show_temp_index(1) 332 show_temp_index(2) 333 show_temp_index(3) 334 335 /* VID */ 336 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 337 char *buf) 338 { 339 struct smsc47m192_data *data = smsc47m192_update_device(dev); 340 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 341 } 342 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 343 344 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 345 char *buf) 346 { 347 struct smsc47m192_data *data = dev_get_drvdata(dev); 348 return sprintf(buf, "%d\n", data->vrm); 349 } 350 351 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 352 const char *buf, size_t count) 353 { 354 struct smsc47m192_data *data = dev_get_drvdata(dev); 355 data->vrm = simple_strtoul(buf, NULL, 10); 356 return count; 357 } 358 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 359 360 /* Alarms */ 361 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 362 char *buf) 363 { 364 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 365 int nr = sensor_attr->index; 366 struct smsc47m192_data *data = smsc47m192_update_device(dev); 367 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); 368 } 369 370 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); 371 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); 372 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); 373 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000); 374 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000); 375 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); 376 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); 377 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); 378 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); 379 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); 380 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); 381 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); 382 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); 383 384 static struct attribute *smsc47m192_attributes[] = { 385 &sensor_dev_attr_in0_input.dev_attr.attr, 386 &sensor_dev_attr_in0_min.dev_attr.attr, 387 &sensor_dev_attr_in0_max.dev_attr.attr, 388 &sensor_dev_attr_in0_alarm.dev_attr.attr, 389 &sensor_dev_attr_in1_input.dev_attr.attr, 390 &sensor_dev_attr_in1_min.dev_attr.attr, 391 &sensor_dev_attr_in1_max.dev_attr.attr, 392 &sensor_dev_attr_in1_alarm.dev_attr.attr, 393 &sensor_dev_attr_in2_input.dev_attr.attr, 394 &sensor_dev_attr_in2_min.dev_attr.attr, 395 &sensor_dev_attr_in2_max.dev_attr.attr, 396 &sensor_dev_attr_in2_alarm.dev_attr.attr, 397 &sensor_dev_attr_in3_input.dev_attr.attr, 398 &sensor_dev_attr_in3_min.dev_attr.attr, 399 &sensor_dev_attr_in3_max.dev_attr.attr, 400 &sensor_dev_attr_in3_alarm.dev_attr.attr, 401 &sensor_dev_attr_in5_input.dev_attr.attr, 402 &sensor_dev_attr_in5_min.dev_attr.attr, 403 &sensor_dev_attr_in5_max.dev_attr.attr, 404 &sensor_dev_attr_in5_alarm.dev_attr.attr, 405 &sensor_dev_attr_in6_input.dev_attr.attr, 406 &sensor_dev_attr_in6_min.dev_attr.attr, 407 &sensor_dev_attr_in6_max.dev_attr.attr, 408 &sensor_dev_attr_in6_alarm.dev_attr.attr, 409 &sensor_dev_attr_in7_input.dev_attr.attr, 410 &sensor_dev_attr_in7_min.dev_attr.attr, 411 &sensor_dev_attr_in7_max.dev_attr.attr, 412 &sensor_dev_attr_in7_alarm.dev_attr.attr, 413 414 &sensor_dev_attr_temp1_input.dev_attr.attr, 415 &sensor_dev_attr_temp1_max.dev_attr.attr, 416 &sensor_dev_attr_temp1_min.dev_attr.attr, 417 &sensor_dev_attr_temp1_offset.dev_attr.attr, 418 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 419 &sensor_dev_attr_temp2_input.dev_attr.attr, 420 &sensor_dev_attr_temp2_max.dev_attr.attr, 421 &sensor_dev_attr_temp2_min.dev_attr.attr, 422 &sensor_dev_attr_temp2_offset.dev_attr.attr, 423 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 424 &sensor_dev_attr_temp2_fault.dev_attr.attr, 425 &sensor_dev_attr_temp3_input.dev_attr.attr, 426 &sensor_dev_attr_temp3_max.dev_attr.attr, 427 &sensor_dev_attr_temp3_min.dev_attr.attr, 428 &sensor_dev_attr_temp3_offset.dev_attr.attr, 429 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 430 &sensor_dev_attr_temp3_fault.dev_attr.attr, 431 432 &dev_attr_cpu0_vid.attr, 433 &dev_attr_vrm.attr, 434 NULL 435 }; 436 437 static const struct attribute_group smsc47m192_group = { 438 .attrs = smsc47m192_attributes, 439 }; 440 441 static struct attribute *smsc47m192_attributes_in4[] = { 442 &sensor_dev_attr_in4_input.dev_attr.attr, 443 &sensor_dev_attr_in4_min.dev_attr.attr, 444 &sensor_dev_attr_in4_max.dev_attr.attr, 445 &sensor_dev_attr_in4_alarm.dev_attr.attr, 446 NULL 447 }; 448 449 static const struct attribute_group smsc47m192_group_in4 = { 450 .attrs = smsc47m192_attributes_in4, 451 }; 452 453 static void smsc47m192_init_client(struct i2c_client *client) 454 { 455 int i; 456 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 457 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 458 459 /* select cycle mode (pause 1 sec between updates) */ 460 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 461 (sfr & 0xfd) | 0x02); 462 if (!(config & 0x01)) { 463 /* initialize alarm limits */ 464 for (i=0; i<8; i++) { 465 i2c_smbus_write_byte_data(client, 466 SMSC47M192_REG_IN_MIN(i), 0); 467 i2c_smbus_write_byte_data(client, 468 SMSC47M192_REG_IN_MAX(i), 0xff); 469 } 470 for (i=0; i<3; i++) { 471 i2c_smbus_write_byte_data(client, 472 SMSC47M192_REG_TEMP_MIN[i], 0x80); 473 i2c_smbus_write_byte_data(client, 474 SMSC47M192_REG_TEMP_MAX[i], 0x7f); 475 } 476 477 /* start monitoring */ 478 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, 479 (config & 0xf7) | 0x01); 480 } 481 } 482 483 /* Return 0 if detection is successful, -ENODEV otherwise */ 484 static int smsc47m192_detect(struct i2c_client *client, int kind, 485 struct i2c_board_info *info) 486 { 487 struct i2c_adapter *adapter = client->adapter; 488 int version; 489 490 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 491 return -ENODEV; 492 493 /* Detection criteria from sensors_detect script */ 494 if (kind < 0) { 495 if (i2c_smbus_read_byte_data(client, 496 SMSC47M192_REG_COMPANY_ID) == 0x55 497 && ((version = i2c_smbus_read_byte_data(client, 498 SMSC47M192_REG_VERSION)) & 0xf0) == 0x20 499 && (i2c_smbus_read_byte_data(client, 500 SMSC47M192_REG_VID) & 0x70) == 0x00 501 && (i2c_smbus_read_byte_data(client, 502 SMSC47M192_REG_VID4) & 0xfe) == 0x80) { 503 dev_info(&adapter->dev, 504 "found SMSC47M192 or compatible, " 505 "version 2, stepping A%d\n", version & 0x0f); 506 } else { 507 dev_dbg(&adapter->dev, 508 "SMSC47M192 detection failed at 0x%02x\n", 509 client->addr); 510 return -ENODEV; 511 } 512 } 513 514 strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); 515 516 return 0; 517 } 518 519 static int smsc47m192_probe(struct i2c_client *client, 520 const struct i2c_device_id *id) 521 { 522 struct smsc47m192_data *data; 523 int config; 524 int err; 525 526 data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL); 527 if (!data) { 528 err = -ENOMEM; 529 goto exit; 530 } 531 532 i2c_set_clientdata(client, data); 533 data->vrm = vid_which_vrm(); 534 mutex_init(&data->update_lock); 535 536 /* Initialize the SMSC47M192 chip */ 537 smsc47m192_init_client(client); 538 539 /* Register sysfs hooks */ 540 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group))) 541 goto exit_free; 542 543 /* Pin 110 is either in4 (+12V) or VID4 */ 544 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 545 if (!(config & 0x20)) { 546 if ((err = sysfs_create_group(&client->dev.kobj, 547 &smsc47m192_group_in4))) 548 goto exit_remove_files; 549 } 550 551 data->hwmon_dev = hwmon_device_register(&client->dev); 552 if (IS_ERR(data->hwmon_dev)) { 553 err = PTR_ERR(data->hwmon_dev); 554 goto exit_remove_files; 555 } 556 557 return 0; 558 559 exit_remove_files: 560 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 561 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 562 exit_free: 563 kfree(data); 564 exit: 565 return err; 566 } 567 568 static int smsc47m192_remove(struct i2c_client *client) 569 { 570 struct smsc47m192_data *data = i2c_get_clientdata(client); 571 572 hwmon_device_unregister(data->hwmon_dev); 573 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 574 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 575 576 kfree(data); 577 578 return 0; 579 } 580 581 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) 582 { 583 struct i2c_client *client = to_i2c_client(dev); 584 struct smsc47m192_data *data = i2c_get_clientdata(client); 585 int i, config; 586 587 mutex_lock(&data->update_lock); 588 589 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 590 || !data->valid) { 591 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 592 593 dev_dbg(&client->dev, "Starting smsc47m192 update\n"); 594 595 for (i = 0; i <= 7; i++) { 596 data->in[i] = i2c_smbus_read_byte_data(client, 597 SMSC47M192_REG_IN(i)); 598 data->in_min[i] = i2c_smbus_read_byte_data(client, 599 SMSC47M192_REG_IN_MIN(i)); 600 data->in_max[i] = i2c_smbus_read_byte_data(client, 601 SMSC47M192_REG_IN_MAX(i)); 602 } 603 for (i = 0; i < 3; i++) { 604 data->temp[i] = i2c_smbus_read_byte_data(client, 605 SMSC47M192_REG_TEMP[i]); 606 data->temp_max[i] = i2c_smbus_read_byte_data(client, 607 SMSC47M192_REG_TEMP_MAX[i]); 608 data->temp_min[i] = i2c_smbus_read_byte_data(client, 609 SMSC47M192_REG_TEMP_MIN[i]); 610 } 611 for (i = 1; i < 3; i++) 612 data->temp_offset[i] = i2c_smbus_read_byte_data(client, 613 SMSC47M192_REG_TEMP_OFFSET(i)); 614 /* first offset is temp_offset[0] if SFR bit 4 is set, 615 temp_offset[1] otherwise */ 616 if (sfr & 0x10) { 617 data->temp_offset[0] = data->temp_offset[1]; 618 data->temp_offset[1] = 0; 619 } else 620 data->temp_offset[0] = 0; 621 622 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) 623 & 0x0f; 624 config = i2c_smbus_read_byte_data(client, 625 SMSC47M192_REG_CONFIG); 626 if (config & 0x20) 627 data->vid |= (i2c_smbus_read_byte_data(client, 628 SMSC47M192_REG_VID4) & 0x01) << 4; 629 data->alarms = i2c_smbus_read_byte_data(client, 630 SMSC47M192_REG_ALARM1) | 631 (i2c_smbus_read_byte_data(client, 632 SMSC47M192_REG_ALARM2) << 8); 633 634 data->last_updated = jiffies; 635 data->valid = 1; 636 } 637 638 mutex_unlock(&data->update_lock); 639 640 return data; 641 } 642 643 static int __init smsc47m192_init(void) 644 { 645 return i2c_add_driver(&smsc47m192_driver); 646 } 647 648 static void __exit smsc47m192_exit(void) 649 { 650 i2c_del_driver(&smsc47m192_driver); 651 } 652 653 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); 654 MODULE_DESCRIPTION("SMSC47M192 driver"); 655 MODULE_LICENSE("GPL"); 656 657 module_init(smsc47m192_init); 658 module_exit(smsc47m192_exit); 659