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 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 class_device *class_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 = smsc47m192_update_device(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 i2c_client *client = to_i2c_client(dev); 345 struct smsc47m192_data *data = i2c_get_clientdata(client); 346 data->vrm = simple_strtoul(buf, NULL, 10); 347 return count; 348 } 349 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 350 351 /* Alarms */ 352 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 353 char *buf) 354 { 355 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 356 int nr = sensor_attr->index; 357 struct smsc47m192_data *data = smsc47m192_update_device(dev); 358 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); 359 } 360 361 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); 362 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); 363 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); 364 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000); 365 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000); 366 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); 367 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); 368 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); 369 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); 370 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); 371 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); 372 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); 373 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); 374 375 static struct attribute *smsc47m192_attributes[] = { 376 &sensor_dev_attr_in0_input.dev_attr.attr, 377 &sensor_dev_attr_in0_min.dev_attr.attr, 378 &sensor_dev_attr_in0_max.dev_attr.attr, 379 &sensor_dev_attr_in0_alarm.dev_attr.attr, 380 &sensor_dev_attr_in1_input.dev_attr.attr, 381 &sensor_dev_attr_in1_min.dev_attr.attr, 382 &sensor_dev_attr_in1_max.dev_attr.attr, 383 &sensor_dev_attr_in1_alarm.dev_attr.attr, 384 &sensor_dev_attr_in2_input.dev_attr.attr, 385 &sensor_dev_attr_in2_min.dev_attr.attr, 386 &sensor_dev_attr_in2_max.dev_attr.attr, 387 &sensor_dev_attr_in2_alarm.dev_attr.attr, 388 &sensor_dev_attr_in3_input.dev_attr.attr, 389 &sensor_dev_attr_in3_min.dev_attr.attr, 390 &sensor_dev_attr_in3_max.dev_attr.attr, 391 &sensor_dev_attr_in3_alarm.dev_attr.attr, 392 &sensor_dev_attr_in5_input.dev_attr.attr, 393 &sensor_dev_attr_in5_min.dev_attr.attr, 394 &sensor_dev_attr_in5_max.dev_attr.attr, 395 &sensor_dev_attr_in5_alarm.dev_attr.attr, 396 &sensor_dev_attr_in6_input.dev_attr.attr, 397 &sensor_dev_attr_in6_min.dev_attr.attr, 398 &sensor_dev_attr_in6_max.dev_attr.attr, 399 &sensor_dev_attr_in6_alarm.dev_attr.attr, 400 &sensor_dev_attr_in7_input.dev_attr.attr, 401 &sensor_dev_attr_in7_min.dev_attr.attr, 402 &sensor_dev_attr_in7_max.dev_attr.attr, 403 &sensor_dev_attr_in7_alarm.dev_attr.attr, 404 405 &sensor_dev_attr_temp1_input.dev_attr.attr, 406 &sensor_dev_attr_temp1_max.dev_attr.attr, 407 &sensor_dev_attr_temp1_min.dev_attr.attr, 408 &sensor_dev_attr_temp1_offset.dev_attr.attr, 409 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 410 &sensor_dev_attr_temp2_input.dev_attr.attr, 411 &sensor_dev_attr_temp2_max.dev_attr.attr, 412 &sensor_dev_attr_temp2_min.dev_attr.attr, 413 &sensor_dev_attr_temp2_offset.dev_attr.attr, 414 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 415 &sensor_dev_attr_temp2_fault.dev_attr.attr, 416 &sensor_dev_attr_temp3_input.dev_attr.attr, 417 &sensor_dev_attr_temp3_max.dev_attr.attr, 418 &sensor_dev_attr_temp3_min.dev_attr.attr, 419 &sensor_dev_attr_temp3_offset.dev_attr.attr, 420 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 421 &sensor_dev_attr_temp3_fault.dev_attr.attr, 422 423 &dev_attr_cpu0_vid.attr, 424 &dev_attr_vrm.attr, 425 NULL 426 }; 427 428 static const struct attribute_group smsc47m192_group = { 429 .attrs = smsc47m192_attributes, 430 }; 431 432 static struct attribute *smsc47m192_attributes_in4[] = { 433 &sensor_dev_attr_in4_input.dev_attr.attr, 434 &sensor_dev_attr_in4_min.dev_attr.attr, 435 &sensor_dev_attr_in4_max.dev_attr.attr, 436 &sensor_dev_attr_in4_alarm.dev_attr.attr, 437 NULL 438 }; 439 440 static const struct attribute_group smsc47m192_group_in4 = { 441 .attrs = smsc47m192_attributes_in4, 442 }; 443 444 /* This function is called when: 445 * smsc47m192_driver is inserted (when this module is loaded), for each 446 available adapter 447 * when a new adapter is inserted (and smsc47m192_driver is still present) */ 448 static int smsc47m192_attach_adapter(struct i2c_adapter *adapter) 449 { 450 if (!(adapter->class & I2C_CLASS_HWMON)) 451 return 0; 452 return i2c_probe(adapter, &addr_data, smsc47m192_detect); 453 } 454 455 static void smsc47m192_init_client(struct i2c_client *client) 456 { 457 int i; 458 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 459 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 460 461 /* select cycle mode (pause 1 sec between updates) */ 462 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 463 (sfr & 0xfd) | 0x02); 464 if (!(config & 0x01)) { 465 /* initialize alarm limits */ 466 for (i=0; i<8; i++) { 467 i2c_smbus_write_byte_data(client, 468 SMSC47M192_REG_IN_MIN(i), 0); 469 i2c_smbus_write_byte_data(client, 470 SMSC47M192_REG_IN_MAX(i), 0xff); 471 } 472 for (i=0; i<3; i++) { 473 i2c_smbus_write_byte_data(client, 474 SMSC47M192_REG_TEMP_MIN[i], 0x80); 475 i2c_smbus_write_byte_data(client, 476 SMSC47M192_REG_TEMP_MAX[i], 0x7f); 477 } 478 479 /* start monitoring */ 480 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, 481 (config & 0xf7) | 0x01); 482 } 483 } 484 485 /* This function is called by i2c_probe */ 486 static int smsc47m192_detect(struct i2c_adapter *adapter, int address, 487 int kind) 488 { 489 struct i2c_client *client; 490 struct smsc47m192_data *data; 491 int err = 0; 492 int version, config; 493 494 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 495 goto exit; 496 497 if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) { 498 err = -ENOMEM; 499 goto exit; 500 } 501 502 client = &data->client; 503 i2c_set_clientdata(client, data); 504 client->addr = address; 505 client->adapter = adapter; 506 client->driver = &smsc47m192_driver; 507 508 if (kind == 0) 509 kind = smsc47m192; 510 511 /* Detection criteria from sensors_detect script */ 512 if (kind < 0) { 513 if (i2c_smbus_read_byte_data(client, 514 SMSC47M192_REG_COMPANY_ID) == 0x55 515 && ((version = i2c_smbus_read_byte_data(client, 516 SMSC47M192_REG_VERSION)) & 0xf0) == 0x20 517 && (i2c_smbus_read_byte_data(client, 518 SMSC47M192_REG_VID) & 0x70) == 0x00 519 && (i2c_smbus_read_byte_data(client, 520 SMSC47M192_REG_VID4) & 0xfe) == 0x80) { 521 dev_info(&adapter->dev, 522 "found SMSC47M192 or compatible, " 523 "version 2, stepping A%d\n", version & 0x0f); 524 } else { 525 dev_dbg(&adapter->dev, 526 "SMSC47M192 detection failed at 0x%02x\n", 527 address); 528 goto exit_free; 529 } 530 } 531 532 /* Fill in the remaining client fields and put into the global list */ 533 strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE); 534 data->vrm = vid_which_vrm(); 535 mutex_init(&data->update_lock); 536 537 /* Tell the I2C layer a new client has arrived */ 538 if ((err = i2c_attach_client(client))) 539 goto exit_free; 540 541 /* Initialize the SMSC47M192 chip */ 542 smsc47m192_init_client(client); 543 544 /* Register sysfs hooks */ 545 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group))) 546 goto exit_detach; 547 548 /* Pin 110 is either in4 (+12V) or VID4 */ 549 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 550 if (!(config & 0x20)) { 551 if ((err = sysfs_create_group(&client->dev.kobj, 552 &smsc47m192_group_in4))) 553 goto exit_remove_files; 554 } 555 556 data->class_dev = hwmon_device_register(&client->dev); 557 if (IS_ERR(data->class_dev)) { 558 err = PTR_ERR(data->class_dev); 559 goto exit_remove_files; 560 } 561 562 return 0; 563 564 exit_remove_files: 565 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 566 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 567 exit_detach: 568 i2c_detach_client(client); 569 exit_free: 570 kfree(data); 571 exit: 572 return err; 573 } 574 575 static int smsc47m192_detach_client(struct i2c_client *client) 576 { 577 struct smsc47m192_data *data = i2c_get_clientdata(client); 578 int err; 579 580 hwmon_device_unregister(data->class_dev); 581 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 582 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 583 584 if ((err = i2c_detach_client(client))) 585 return err; 586 587 kfree(data); 588 589 return 0; 590 } 591 592 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) 593 { 594 struct i2c_client *client = to_i2c_client(dev); 595 struct smsc47m192_data *data = i2c_get_clientdata(client); 596 int i, config; 597 598 mutex_lock(&data->update_lock); 599 600 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 601 || !data->valid) { 602 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 603 604 dev_dbg(&client->dev, "Starting smsc47m192 update\n"); 605 606 for (i = 0; i <= 7; i++) { 607 data->in[i] = i2c_smbus_read_byte_data(client, 608 SMSC47M192_REG_IN(i)); 609 data->in_min[i] = i2c_smbus_read_byte_data(client, 610 SMSC47M192_REG_IN_MIN(i)); 611 data->in_max[i] = i2c_smbus_read_byte_data(client, 612 SMSC47M192_REG_IN_MAX(i)); 613 } 614 for (i = 0; i < 3; i++) { 615 data->temp[i] = i2c_smbus_read_byte_data(client, 616 SMSC47M192_REG_TEMP[i]); 617 data->temp_max[i] = i2c_smbus_read_byte_data(client, 618 SMSC47M192_REG_TEMP_MAX[i]); 619 data->temp_min[i] = i2c_smbus_read_byte_data(client, 620 SMSC47M192_REG_TEMP_MIN[i]); 621 } 622 for (i = 1; i < 3; i++) 623 data->temp_offset[i] = i2c_smbus_read_byte_data(client, 624 SMSC47M192_REG_TEMP_OFFSET(i)); 625 /* first offset is temp_offset[0] if SFR bit 4 is set, 626 temp_offset[1] otherwise */ 627 if (sfr & 0x10) { 628 data->temp_offset[0] = data->temp_offset[1]; 629 data->temp_offset[1] = 0; 630 } else 631 data->temp_offset[0] = 0; 632 633 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) 634 & 0x0f; 635 config = i2c_smbus_read_byte_data(client, 636 SMSC47M192_REG_CONFIG); 637 if (config & 0x20) 638 data->vid |= (i2c_smbus_read_byte_data(client, 639 SMSC47M192_REG_VID4) & 0x01) << 4; 640 data->alarms = i2c_smbus_read_byte_data(client, 641 SMSC47M192_REG_ALARM1) | 642 (i2c_smbus_read_byte_data(client, 643 SMSC47M192_REG_ALARM2) << 8); 644 645 data->last_updated = jiffies; 646 data->valid = 1; 647 } 648 649 mutex_unlock(&data->update_lock); 650 651 return data; 652 } 653 654 static int __init smsc47m192_init(void) 655 { 656 return i2c_add_driver(&smsc47m192_driver); 657 } 658 659 static void __exit smsc47m192_exit(void) 660 { 661 i2c_del_driver(&smsc47m192_driver); 662 } 663 664 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); 665 MODULE_DESCRIPTION("SMSC47M192 driver"); 666 MODULE_LICENSE("GPL"); 667 668 module_init(smsc47m192_init); 669 module_exit(smsc47m192_exit); 670