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 35 /* Addresses to scan */ 36 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 37 38 /* Insmod parameters */ 39 I2C_CLIENT_INSMOD_1(smsc47m192); 40 41 /* SMSC47M192 registers */ 42 #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \ 43 (0x50 + (nr) - 6)) 44 #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \ 45 (0x54 + (((nr) - 6) * 2))) 46 #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \ 47 (0x55 + (((nr) - 6) * 2))) 48 static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; 49 static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; 50 static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; 51 #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f) 52 #define SMSC47M192_REG_ALARM1 0x41 53 #define SMSC47M192_REG_ALARM2 0x42 54 #define SMSC47M192_REG_VID 0x47 55 #define SMSC47M192_REG_VID4 0x49 56 #define SMSC47M192_REG_CONFIG 0x40 57 #define SMSC47M192_REG_SFR 0x4f 58 #define SMSC47M192_REG_COMPANY_ID 0x3e 59 #define SMSC47M192_REG_VERSION 0x3f 60 61 /* generalised scaling with integer rounding */ 62 static inline int SCALE(long val, int mul, int div) 63 { 64 if (val < 0) 65 return (val * mul - div / 2) / div; 66 else 67 return (val * mul + div / 2) / div; 68 } 69 70 /* Conversions */ 71 72 /* smsc47m192 internally scales voltage measurements */ 73 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; 74 75 static inline unsigned int IN_FROM_REG(u8 reg, int n) 76 { 77 return SCALE(reg, nom_mv[n], 192); 78 } 79 80 static inline u8 IN_TO_REG(unsigned long val, int n) 81 { 82 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); 83 } 84 85 /* TEMP: 0.001 degC units (-128C to +127C) 86 REG: 1C/bit, two's complement */ 87 static inline s8 TEMP_TO_REG(int val) 88 { 89 return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000); 90 } 91 92 static inline int TEMP_FROM_REG(s8 val) 93 { 94 return val * 1000; 95 } 96 97 struct smsc47m192_data { 98 struct i2c_client client; 99 struct class_device *class_dev; 100 struct semaphore 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_attach_adapter(struct i2c_adapter *adapter); 117 static int smsc47m192_detect(struct i2c_adapter *adapter, int address, 118 int kind); 119 static int smsc47m192_detach_client(struct i2c_client *client); 120 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); 121 122 static struct i2c_driver smsc47m192_driver = { 123 .driver = { 124 .name = "smsc47m192", 125 }, 126 .attach_adapter = smsc47m192_attach_adapter, 127 .detach_client = smsc47m192_detach_client, 128 }; 129 130 /* Voltages */ 131 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 132 char *buf) 133 { 134 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 135 int nr = sensor_attr->index; 136 struct smsc47m192_data *data = smsc47m192_update_device(dev); 137 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 138 } 139 140 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 141 char *buf) 142 { 143 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 144 int nr = sensor_attr->index; 145 struct smsc47m192_data *data = smsc47m192_update_device(dev); 146 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 147 } 148 149 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 150 char *buf) 151 { 152 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 153 int nr = sensor_attr->index; 154 struct smsc47m192_data *data = smsc47m192_update_device(dev); 155 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 156 } 157 158 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 159 const char *buf, size_t count) 160 { 161 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 162 int nr = sensor_attr->index; 163 struct i2c_client *client = to_i2c_client(dev); 164 struct smsc47m192_data *data = i2c_get_clientdata(client); 165 unsigned long val = simple_strtoul(buf, NULL, 10); 166 167 down(&data->update_lock); 168 data->in_min[nr] = IN_TO_REG(val, nr); 169 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), 170 data->in_min[nr]); 171 up(&data->update_lock); 172 return count; 173 } 174 175 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 176 const char *buf, size_t count) 177 { 178 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 179 int nr = sensor_attr->index; 180 struct i2c_client *client = to_i2c_client(dev); 181 struct smsc47m192_data *data = i2c_get_clientdata(client); 182 unsigned long val = simple_strtoul(buf, NULL, 10); 183 184 down(&data->update_lock); 185 data->in_max[nr] = IN_TO_REG(val, nr); 186 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), 187 data->in_max[nr]); 188 up(&data->update_lock); 189 return count; 190 } 191 192 #define show_in_offset(offset) \ 193 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 194 show_in, NULL, offset); \ 195 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 196 show_in_min, set_in_min, offset); \ 197 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 198 show_in_max, set_in_max, offset); 199 200 show_in_offset(0) 201 show_in_offset(1) 202 show_in_offset(2) 203 show_in_offset(3) 204 show_in_offset(4) 205 show_in_offset(5) 206 show_in_offset(6) 207 show_in_offset(7) 208 209 /* Temperatures */ 210 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 211 char *buf) 212 { 213 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 214 int nr = sensor_attr->index; 215 struct smsc47m192_data *data = smsc47m192_update_device(dev); 216 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 217 } 218 219 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 220 char *buf) 221 { 222 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 223 int nr = sensor_attr->index; 224 struct smsc47m192_data *data = smsc47m192_update_device(dev); 225 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 226 } 227 228 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 229 char *buf) 230 { 231 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 232 int nr = sensor_attr->index; 233 struct smsc47m192_data *data = smsc47m192_update_device(dev); 234 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 235 } 236 237 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 238 const char *buf, size_t count) 239 { 240 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 241 int nr = sensor_attr->index; 242 struct i2c_client *client = to_i2c_client(dev); 243 struct smsc47m192_data *data = i2c_get_clientdata(client); 244 long val = simple_strtol(buf, NULL, 10); 245 246 down(&data->update_lock); 247 data->temp_min[nr] = TEMP_TO_REG(val); 248 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], 249 data->temp_min[nr]); 250 up(&data->update_lock); 251 return count; 252 } 253 254 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 255 const char *buf, size_t count) 256 { 257 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 258 int nr = sensor_attr->index; 259 struct i2c_client *client = to_i2c_client(dev); 260 struct smsc47m192_data *data = i2c_get_clientdata(client); 261 long val = simple_strtol(buf, NULL, 10); 262 263 down(&data->update_lock); 264 data->temp_max[nr] = TEMP_TO_REG(val); 265 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], 266 data->temp_max[nr]); 267 up(&data->update_lock); 268 return count; 269 } 270 271 static ssize_t show_temp_offset(struct device *dev, struct device_attribute 272 *attr, char *buf) 273 { 274 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 275 int nr = sensor_attr->index; 276 struct smsc47m192_data *data = smsc47m192_update_device(dev); 277 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); 278 } 279 280 static ssize_t set_temp_offset(struct device *dev, struct device_attribute 281 *attr, const char *buf, size_t count) 282 { 283 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 284 int nr = sensor_attr->index; 285 struct i2c_client *client = to_i2c_client(dev); 286 struct smsc47m192_data *data = i2c_get_clientdata(client); 287 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 288 long val = simple_strtol(buf, NULL, 10); 289 290 down(&data->update_lock); 291 data->temp_offset[nr] = TEMP_TO_REG(val); 292 if (nr>1) 293 i2c_smbus_write_byte_data(client, 294 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 295 else if (data->temp_offset[nr] != 0) { 296 /* offset[0] and offset[1] share the same register, 297 SFR bit 4 activates offset[0] */ 298 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 299 (sfr & 0xef) | (nr==0 ? 0x10 : 0)); 300 data->temp_offset[1-nr] = 0; 301 i2c_smbus_write_byte_data(client, 302 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 303 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0)) 304 i2c_smbus_write_byte_data(client, 305 SMSC47M192_REG_TEMP_OFFSET(nr), 0); 306 up(&data->update_lock); 307 return count; 308 } 309 310 #define show_temp_index(index) \ 311 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ 312 show_temp, NULL, index-1); \ 313 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ 314 show_temp_min, set_temp_min, index-1); \ 315 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ 316 show_temp_max, set_temp_max, index-1); \ 317 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ 318 show_temp_offset, set_temp_offset, index-1); 319 320 show_temp_index(1) 321 show_temp_index(2) 322 show_temp_index(3) 323 324 /* VID */ 325 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 326 char *buf) 327 { 328 struct smsc47m192_data *data = smsc47m192_update_device(dev); 329 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 330 } 331 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 332 333 static ssize_t show_vrm(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", data->vrm); 338 } 339 340 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 341 const char *buf, size_t count) 342 { 343 struct i2c_client *client = to_i2c_client(dev); 344 struct smsc47m192_data *data = i2c_get_clientdata(client); 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_input_fault, S_IRUGO, show_alarm, NULL, 0x4000); 364 static SENSOR_DEVICE_ATTR(temp3_input_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_input_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_input_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 init_MUTEX(&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->class_dev = hwmon_device_register(&client->dev); 556 if (IS_ERR(data->class_dev)) { 557 err = PTR_ERR(data->class_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->class_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 down(&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 up(&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