1 2 3#include <linux/module.h> 4#include <linux/init.h> 5#include <linux/slab.h> 6#include <linux/jiffies.h> 7#include <linux/i2c.h> 8#include <linux/hwmon.h> 9#include <linux/hwmon-sysfs.h> 10#include <linux/err.h> 11#include <linux/mutex.h> 12#include <linux/sysfs.h> 13 14/* Addresses to scan */ 15static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 16 17enum chips { gl518sm_r00, gl518sm_r80 }; 18 19/* Many GL518 constants specified below */ 20 21/* The GL518 registers */ 22#define GL518_REG_CHIP_ID 0x00 23#define GL518_REG_REVISION 0x01 24#define GL518_REG_VENDOR_ID 0x02 25#define GL518_REG_CONF 0x03 26#define GL518_REG_TEMP_IN 0x04 27#define GL518_REG_TEMP_MAX 0x05 28#define GL518_REG_TEMP_HYST 0x06 29#define GL518_REG_FAN_COUNT 0x07 30#define GL518_REG_FAN_LIMIT 0x08 31#define GL518_REG_VIN1_LIMIT 0x09 32#define GL518_REG_VIN2_LIMIT 0x0a 33#define GL518_REG_VIN3_LIMIT 0x0b 34#define GL518_REG_VDD_LIMIT 0x0c 35#define GL518_REG_VIN3 0x0d 36#define GL518_REG_MISC 0x0f 37#define GL518_REG_ALARM 0x10 38#define GL518_REG_MASK 0x11 39#define GL518_REG_INT 0x12 40#define GL518_REG_VIN2 0x13 41#define GL518_REG_VIN1 0x14 42#define GL518_REG_VDD 0x15 43 44 45/* 46 * Conversions. Rounding and limit checking is only done on the TO_REG 47 * variants. Note that you should be a bit careful with which arguments 48 * these macros are called: arguments may be evaluated more than once. 49 * Fixing this is just not worth it. 50 */ 51 52#define RAW_FROM_REG(val) val 53 54#define BOOL_FROM_REG(val) ((val)?0:1) 55#define BOOL_TO_REG(val) ((val)?0:1) 56 57#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0? \ 58 (val)-500:(val)+500)/1000)+119),0,255)) 59#define TEMP_FROM_REG(val) (((val) - 119) * 1000) 60 61static inline u8 FAN_TO_REG(long rpm, int div) 62{ 63 long rpmdiv; 64 if (rpm == 0) 65 return 0; 66 rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div; 67 return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255); 68} 69#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val)*(div)))) 70 71#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) 72#define IN_FROM_REG(val) ((val)*19) 73 74#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) 75#define VDD_FROM_REG(val) (((val)*95+2)/4) 76 77#define DIV_FROM_REG(val) (1 << (val)) 78 79#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) 80#define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) 81 82/* Each client has this additional data */ 83struct gl518_data { 84 struct device *hwmon_dev; 85 enum chips type; 86 87 struct mutex update_lock; 88 char valid; /* !=0 if following fields are valid */ 89 unsigned long last_updated; /* In jiffies */ 90 91 u8 voltage_in[4]; /* Register values; [0] = VDD */ 92 u8 voltage_min[4]; /* Register values; [0] = VDD */ 93 u8 voltage_max[4]; /* Register values; [0] = VDD */ 94 u8 fan_in[2]; 95 u8 fan_min[2]; 96 u8 fan_div[2]; /* Register encoding, shifted right */ 97 u8 fan_auto1; /* Boolean */ 98 u8 temp_in; /* Register values */ 99 u8 temp_max; /* Register values */ 100 u8 temp_hyst; /* Register values */ 101 u8 alarms; /* Register value */ 102 u8 alarm_mask; 103 u8 beep_mask; /* Register value */ 104 u8 beep_enable; /* Boolean */ 105}; 106 107static int gl518_probe(struct i2c_client *client, 108 const struct i2c_device_id *id); 109static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info); 110static void gl518_init_client(struct i2c_client *client); 111static int gl518_remove(struct i2c_client *client); 112static int gl518_read_value(struct i2c_client *client, u8 reg); 113static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value); 114static struct gl518_data *gl518_update_device(struct device *dev); 115 116static const struct i2c_device_id gl518_id[] = { 117 { "gl518sm", 0 }, 118 { } 119}; 120MODULE_DEVICE_TABLE(i2c, gl518_id); 121 122/* This is the driver that will be inserted */ 123static struct i2c_driver gl518_driver = { 124 .class = I2C_CLASS_HWMON, 125 .driver = { 126 .name = "gl518sm", 127 }, 128 .probe = gl518_probe, 129 .remove = gl518_remove, 130 .id_table = gl518_id, 131 .detect = gl518_detect, 132 .address_list = normal_i2c, 133}; 134 135/* 136 * Sysfs stuff 137 */ 138 139#define show(type, suffix, value) \ 140static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ 141{ \ 142 struct gl518_data *data = gl518_update_device(dev); \ 143 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 144} 145 146show(TEMP, temp_input1, temp_in); 147show(TEMP, temp_max1, temp_max); 148show(TEMP, temp_hyst1, temp_hyst); 149show(BOOL, fan_auto1, fan_auto1); 150show(VDD, in_input0, voltage_in[0]); 151show(IN, in_input1, voltage_in[1]); 152show(IN, in_input2, voltage_in[2]); 153show(IN, in_input3, voltage_in[3]); 154show(VDD, in_min0, voltage_min[0]); 155show(IN, in_min1, voltage_min[1]); 156show(IN, in_min2, voltage_min[2]); 157show(IN, in_min3, voltage_min[3]); 158show(VDD, in_max0, voltage_max[0]); 159show(IN, in_max1, voltage_max[1]); 160show(IN, in_max2, voltage_max[2]); 161show(IN, in_max3, voltage_max[3]); 162show(RAW, alarms, alarms); 163show(BOOL, beep_enable, beep_enable); 164show(BEEP_MASK, beep_mask, beep_mask); 165 166static ssize_t show_fan_input(struct device *dev, 167 struct device_attribute *attr, char *buf) 168{ 169 int nr = to_sensor_dev_attr(attr)->index; 170 struct gl518_data *data = gl518_update_device(dev); 171 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 172 DIV_FROM_REG(data->fan_div[nr]))); 173} 174 175static ssize_t show_fan_min(struct device *dev, 176 struct device_attribute *attr, char *buf) 177{ 178 int nr = to_sensor_dev_attr(attr)->index; 179 struct gl518_data *data = gl518_update_device(dev); 180 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 181 DIV_FROM_REG(data->fan_div[nr]))); 182} 183 184static ssize_t show_fan_div(struct device *dev, 185 struct device_attribute *attr, char *buf) 186{ 187 int nr = to_sensor_dev_attr(attr)->index; 188 struct gl518_data *data = gl518_update_device(dev); 189 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 190} 191 192#define set(type, suffix, value, reg) \ 193static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 194 size_t count) \ 195{ \ 196 struct i2c_client *client = to_i2c_client(dev); \ 197 struct gl518_data *data = i2c_get_clientdata(client); \ 198 long val = simple_strtol(buf, NULL, 10); \ 199 \ 200 mutex_lock(&data->update_lock); \ 201 data->value = type##_TO_REG(val); \ 202 gl518_write_value(client, reg, data->value); \ 203 mutex_unlock(&data->update_lock); \ 204 return count; \ 205} 206 207#define set_bits(type, suffix, value, reg, mask, shift) \ 208static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 209 size_t count) \ 210{ \ 211 struct i2c_client *client = to_i2c_client(dev); \ 212 struct gl518_data *data = i2c_get_clientdata(client); \ 213 int regvalue; \ 214 unsigned long val = simple_strtoul(buf, NULL, 10); \ 215 \ 216 mutex_lock(&data->update_lock); \ 217 regvalue = gl518_read_value(client, reg); \ 218 data->value = type##_TO_REG(val); \ 219 regvalue = (regvalue & ~mask) | (data->value << shift); \ 220 gl518_write_value(client, reg, regvalue); \ 221 mutex_unlock(&data->update_lock); \ 222 return count; \ 223} 224 225#define set_low(type, suffix, value, reg) \ 226 set_bits(type, suffix, value, reg, 0x00ff, 0) 227#define set_high(type, suffix, value, reg) \ 228 set_bits(type, suffix, value, reg, 0xff00, 8) 229 230set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 231set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 232set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 233set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 234set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 235set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 236set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 237set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 238set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 239set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 240set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 241set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 242set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 243 244static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 245 const char *buf, size_t count) 246{ 247 struct i2c_client *client = to_i2c_client(dev); 248 struct gl518_data *data = i2c_get_clientdata(client); 249 int nr = to_sensor_dev_attr(attr)->index; 250 int regvalue; 251 unsigned long val = simple_strtoul(buf, NULL, 10); 252 253 mutex_lock(&data->update_lock); 254 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 255 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 256 regvalue = (regvalue & (0xff << (8 * nr))) 257 | (data->fan_min[nr] << (8 * (1 - nr))); 258 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 259 260 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 261 if (data->fan_min[nr] == 0) 262 data->alarm_mask &= ~(0x20 << nr); 263 else 264 data->alarm_mask |= (0x20 << nr); 265 data->beep_mask &= data->alarm_mask; 266 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 267 268 mutex_unlock(&data->update_lock); 269 return count; 270} 271 272static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 273 const char *buf, size_t count) 274{ 275 struct i2c_client *client = to_i2c_client(dev); 276 struct gl518_data *data = i2c_get_clientdata(client); 277 int nr = to_sensor_dev_attr(attr)->index; 278 int regvalue; 279 unsigned long val = simple_strtoul(buf, NULL, 10); 280 281 switch (val) { 282 case 1: val = 0; break; 283 case 2: val = 1; break; 284 case 4: val = 2; break; 285 case 8: val = 3; break; 286 default: 287 dev_err(dev, "Invalid fan clock divider %lu, choose one " 288 "of 1, 2, 4 or 8\n", val); 289 return -EINVAL; 290 } 291 292 mutex_lock(&data->update_lock); 293 regvalue = gl518_read_value(client, GL518_REG_MISC); 294 data->fan_div[nr] = val; 295 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 296 | (data->fan_div[nr] << (6 - 2 * nr)); 297 gl518_write_value(client, GL518_REG_MISC, regvalue); 298 mutex_unlock(&data->update_lock); 299 return count; 300} 301 302static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 303static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 304static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 305 show_temp_hyst1, set_temp_hyst1); 306static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 307static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 308static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 309static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 310 show_fan_min, set_fan_min, 0); 311static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 312 show_fan_min, set_fan_min, 1); 313static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 314 show_fan_div, set_fan_div, 0); 315static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 316 show_fan_div, set_fan_div, 1); 317static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 318static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 319static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 320static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 321static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 322static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 323static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 324static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 325static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 326static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 327static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 328static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 329static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 330static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 331 show_beep_enable, set_beep_enable); 332static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 333 show_beep_mask, set_beep_mask); 334 335static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 336 char *buf) 337{ 338 int bitnr = to_sensor_dev_attr(attr)->index; 339 struct gl518_data *data = gl518_update_device(dev); 340 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 341} 342 343static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 344static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 345static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 346static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 347static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 348static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 349static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 350 351static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 352 char *buf) 353{ 354 int bitnr = to_sensor_dev_attr(attr)->index; 355 struct gl518_data *data = gl518_update_device(dev); 356 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 357} 358 359static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 360 const char *buf, size_t count) 361{ 362 struct i2c_client *client = to_i2c_client(dev); 363 struct gl518_data *data = i2c_get_clientdata(client); 364 int bitnr = to_sensor_dev_attr(attr)->index; 365 unsigned long bit; 366 367 bit = simple_strtoul(buf, NULL, 10); 368 if (bit & ~1) 369 return -EINVAL; 370 371 mutex_lock(&data->update_lock); 372 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 373 if (bit) 374 data->beep_mask |= (1 << bitnr); 375 else 376 data->beep_mask &= ~(1 << bitnr); 377 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 378 mutex_unlock(&data->update_lock); 379 return count; 380} 381 382static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 383static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 384static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 385static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 386static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 387static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 388static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 389 390static struct attribute *gl518_attributes[] = { 391 &dev_attr_in3_input.attr, 392 &dev_attr_in0_min.attr, 393 &dev_attr_in1_min.attr, 394 &dev_attr_in2_min.attr, 395 &dev_attr_in3_min.attr, 396 &dev_attr_in0_max.attr, 397 &dev_attr_in1_max.attr, 398 &dev_attr_in2_max.attr, 399 &dev_attr_in3_max.attr, 400 &sensor_dev_attr_in0_alarm.dev_attr.attr, 401 &sensor_dev_attr_in1_alarm.dev_attr.attr, 402 &sensor_dev_attr_in2_alarm.dev_attr.attr, 403 &sensor_dev_attr_in3_alarm.dev_attr.attr, 404 &sensor_dev_attr_in0_beep.dev_attr.attr, 405 &sensor_dev_attr_in1_beep.dev_attr.attr, 406 &sensor_dev_attr_in2_beep.dev_attr.attr, 407 &sensor_dev_attr_in3_beep.dev_attr.attr, 408 409 &dev_attr_fan1_auto.attr, 410 &sensor_dev_attr_fan1_input.dev_attr.attr, 411 &sensor_dev_attr_fan2_input.dev_attr.attr, 412 &sensor_dev_attr_fan1_min.dev_attr.attr, 413 &sensor_dev_attr_fan2_min.dev_attr.attr, 414 &sensor_dev_attr_fan1_div.dev_attr.attr, 415 &sensor_dev_attr_fan2_div.dev_attr.attr, 416 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 417 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 418 &sensor_dev_attr_fan1_beep.dev_attr.attr, 419 &sensor_dev_attr_fan2_beep.dev_attr.attr, 420 421 &dev_attr_temp1_input.attr, 422 &dev_attr_temp1_max.attr, 423 &dev_attr_temp1_max_hyst.attr, 424 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 425 &sensor_dev_attr_temp1_beep.dev_attr.attr, 426 427 &dev_attr_alarms.attr, 428 &dev_attr_beep_enable.attr, 429 &dev_attr_beep_mask.attr, 430 NULL 431}; 432 433static const struct attribute_group gl518_group = { 434 .attrs = gl518_attributes, 435}; 436 437static struct attribute *gl518_attributes_r80[] = { 438 &dev_attr_in0_input.attr, 439 &dev_attr_in1_input.attr, 440 &dev_attr_in2_input.attr, 441 NULL 442}; 443 444static const struct attribute_group gl518_group_r80 = { 445 .attrs = gl518_attributes_r80, 446}; 447 448/* 449 * Real code 450 */ 451 452/* Return 0 if detection is successful, -ENODEV otherwise */ 453static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 454{ 455 struct i2c_adapter *adapter = client->adapter; 456 int rev; 457 458 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 459 I2C_FUNC_SMBUS_WORD_DATA)) 460 return -ENODEV; 461 462 /* Now, we do the remaining detection. */ 463 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 464 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 465 return -ENODEV; 466 467 /* Determine the chip type. */ 468 rev = gl518_read_value(client, GL518_REG_REVISION); 469 if (rev != 0x00 && rev != 0x80) 470 return -ENODEV; 471 472 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 473 474 return 0; 475} 476 477static int gl518_probe(struct i2c_client *client, 478 const struct i2c_device_id *id) 479{ 480 struct gl518_data *data; 481 int err, revision; 482 483 data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL); 484 if (!data) { 485 err = -ENOMEM; 486 goto exit; 487 } 488 489 i2c_set_clientdata(client, data); 490 revision = gl518_read_value(client, GL518_REG_REVISION); 491 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 492 mutex_init(&data->update_lock); 493 494 /* Initialize the GL518SM chip */ 495 data->alarm_mask = 0xff; 496 gl518_init_client(client); 497 498 /* Register sysfs hooks */ 499 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group))) 500 goto exit_free; 501 if (data->type == gl518sm_r80) 502 if ((err = sysfs_create_group(&client->dev.kobj, 503 &gl518_group_r80))) 504 goto exit_remove_files; 505 506 data->hwmon_dev = hwmon_device_register(&client->dev); 507 if (IS_ERR(data->hwmon_dev)) { 508 err = PTR_ERR(data->hwmon_dev); 509 goto exit_remove_files; 510 } 511 512 return 0; 513 514exit_remove_files: 515 sysfs_remove_group(&client->dev.kobj, &gl518_group); 516 if (data->type == gl518sm_r80) 517 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 518exit_free: 519 kfree(data); 520exit: 521 return err; 522} 523 524 525/* Called when we have found a new GL518SM. 526 Note that we preserve D4:NoFan2 and D2:beep_enable. */ 527static void gl518_init_client(struct i2c_client *client) 528{ 529 /* Make sure we leave D7:Reset untouched */ 530 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 531 532 /* Comparator mode (D3=0), standby mode (D6=0) */ 533 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 534 535 /* Never interrupts */ 536 gl518_write_value(client, GL518_REG_MASK, 0x00); 537 538 /* Clear status register (D5=1), start (D6=1) */ 539 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 540 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 541} 542 543static int gl518_remove(struct i2c_client *client) 544{ 545 struct gl518_data *data = i2c_get_clientdata(client); 546 547 hwmon_device_unregister(data->hwmon_dev); 548 sysfs_remove_group(&client->dev.kobj, &gl518_group); 549 if (data->type == gl518sm_r80) 550 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 551 552 kfree(data); 553 return 0; 554} 555 556/* Registers 0x07 to 0x0c are word-sized, others are byte-sized 557 GL518 uses a high-byte first convention, which is exactly opposite to 558 the SMBus standard. */ 559static int gl518_read_value(struct i2c_client *client, u8 reg) 560{ 561 if ((reg >= 0x07) && (reg <= 0x0c)) 562 return swab16(i2c_smbus_read_word_data(client, reg)); 563 else 564 return i2c_smbus_read_byte_data(client, reg); 565} 566 567static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 568{ 569 if ((reg >= 0x07) && (reg <= 0x0c)) 570 return i2c_smbus_write_word_data(client, reg, swab16(value)); 571 else 572 return i2c_smbus_write_byte_data(client, reg, value); 573} 574 575static struct gl518_data *gl518_update_device(struct device *dev) 576{ 577 struct i2c_client *client = to_i2c_client(dev); 578 struct gl518_data *data = i2c_get_clientdata(client); 579 int val; 580 581 mutex_lock(&data->update_lock); 582 583 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 584 || !data->valid) { 585 dev_dbg(&client->dev, "Starting gl518 update\n"); 586 587 data->alarms = gl518_read_value(client, GL518_REG_INT); 588 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 589 590 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 591 data->voltage_min[0] = val & 0xff; 592 data->voltage_max[0] = (val >> 8) & 0xff; 593 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 594 data->voltage_min[1] = val & 0xff; 595 data->voltage_max[1] = (val >> 8) & 0xff; 596 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 597 data->voltage_min[2] = val & 0xff; 598 data->voltage_max[2] = (val >> 8) & 0xff; 599 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 600 data->voltage_min[3] = val & 0xff; 601 data->voltage_max[3] = (val >> 8) & 0xff; 602 603 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 604 data->fan_in[0] = (val >> 8) & 0xff; 605 data->fan_in[1] = val & 0xff; 606 607 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 608 data->fan_min[0] = (val >> 8) & 0xff; 609 data->fan_min[1] = val & 0xff; 610 611 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 612 data->temp_max = 613 gl518_read_value(client, GL518_REG_TEMP_MAX); 614 data->temp_hyst = 615 gl518_read_value(client, GL518_REG_TEMP_HYST); 616 617 val = gl518_read_value(client, GL518_REG_MISC); 618 data->fan_div[0] = (val >> 6) & 0x03; 619 data->fan_div[1] = (val >> 4) & 0x03; 620 data->fan_auto1 = (val >> 3) & 0x01; 621 622 data->alarms &= data->alarm_mask; 623 624 val = gl518_read_value(client, GL518_REG_CONF); 625 data->beep_enable = (val >> 2) & 1; 626 627 if (data->type != gl518sm_r00) { 628 data->voltage_in[0] = 629 gl518_read_value(client, GL518_REG_VDD); 630 data->voltage_in[1] = 631 gl518_read_value(client, GL518_REG_VIN1); 632 data->voltage_in[2] = 633 gl518_read_value(client, GL518_REG_VIN2); 634 } 635 data->voltage_in[3] = 636 gl518_read_value(client, GL518_REG_VIN3); 637 638 data->last_updated = jiffies; 639 data->valid = 1; 640 } 641 642 mutex_unlock(&data->update_lock); 643 644 return data; 645} 646 647static int __init sensors_gl518sm_init(void) 648{ 649 return i2c_add_driver(&gl518_driver); 650} 651 652static void __exit sensors_gl518sm_exit(void) 653{ 654 i2c_del_driver(&gl518_driver); 655} 656 657MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 658 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 659 "Hong-Gunn Chew <hglinux@gunnet.org>"); 660MODULE_DESCRIPTION("GL518SM driver"); 661MODULE_LICENSE("GPL"); 662 663module_init(sensors_gl518sm_init); 664module_exit(sensors_gl518sm_exit); 665