1 /* 2 * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and 5 * Kyosti Malkki <kmalkki@cc.hut.fi> 6 * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and 7 * Jean Delvare <jdelvare@suse.de> 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 * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare 24 * and advice of Greg Kroah-Hartman. 25 * 26 * Notes about the port: 27 * Release 0x00 of the GL518SM chipset doesn't support reading of in0, 28 * in1 nor in2. The original driver had an ugly workaround to get them 29 * anyway (changing limits and watching alarms trigger and wear off). 30 * We did not keep that part of the original driver in the Linux 2.6 31 * version, since it was making the driver significantly more complex 32 * with no real benefit. 33 */ 34 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/slab.h> 38 #include <linux/jiffies.h> 39 #include <linux/i2c.h> 40 #include <linux/hwmon.h> 41 #include <linux/hwmon-sysfs.h> 42 #include <linux/err.h> 43 #include <linux/mutex.h> 44 #include <linux/sysfs.h> 45 46 /* Addresses to scan */ 47 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 48 49 enum chips { gl518sm_r00, gl518sm_r80 }; 50 51 /* Many GL518 constants specified below */ 52 53 /* The GL518 registers */ 54 #define GL518_REG_CHIP_ID 0x00 55 #define GL518_REG_REVISION 0x01 56 #define GL518_REG_VENDOR_ID 0x02 57 #define GL518_REG_CONF 0x03 58 #define GL518_REG_TEMP_IN 0x04 59 #define GL518_REG_TEMP_MAX 0x05 60 #define GL518_REG_TEMP_HYST 0x06 61 #define GL518_REG_FAN_COUNT 0x07 62 #define GL518_REG_FAN_LIMIT 0x08 63 #define GL518_REG_VIN1_LIMIT 0x09 64 #define GL518_REG_VIN2_LIMIT 0x0a 65 #define GL518_REG_VIN3_LIMIT 0x0b 66 #define GL518_REG_VDD_LIMIT 0x0c 67 #define GL518_REG_VIN3 0x0d 68 #define GL518_REG_MISC 0x0f 69 #define GL518_REG_ALARM 0x10 70 #define GL518_REG_MASK 0x11 71 #define GL518_REG_INT 0x12 72 #define GL518_REG_VIN2 0x13 73 #define GL518_REG_VIN1 0x14 74 #define GL518_REG_VDD 0x15 75 76 77 /* 78 * Conversions. Rounding and limit checking is only done on the TO_REG 79 * variants. Note that you should be a bit careful with which arguments 80 * these macros are called: arguments may be evaluated more than once. 81 * Fixing this is just not worth it. 82 */ 83 84 #define RAW_FROM_REG(val) val 85 86 #define BOOL_FROM_REG(val) ((val) ? 0 : 1) 87 #define BOOL_TO_REG(val) ((val) ? 0 : 1) 88 89 #define TEMP_CLAMP(val) clamp_val(val, -119000, 136000) 90 #define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119) 91 #define TEMP_FROM_REG(val) (((val) - 119) * 1000) 92 93 static inline u8 FAN_TO_REG(long rpm, int div) 94 { 95 long rpmdiv; 96 if (rpm == 0) 97 return 0; 98 rpmdiv = clamp_val(rpm, 1, 960000) * div; 99 return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255); 100 } 101 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div)))) 102 103 #define IN_CLAMP(val) clamp_val(val, 0, 255 * 19) 104 #define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19) 105 #define IN_FROM_REG(val) ((val) * 19) 106 107 #define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4) 108 #define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95) 109 #define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4) 110 111 #define DIV_FROM_REG(val) (1 << (val)) 112 113 #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) 114 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) 115 116 /* Each client has this additional data */ 117 struct gl518_data { 118 struct i2c_client *client; 119 const struct attribute_group *groups[3]; 120 enum chips type; 121 122 struct mutex update_lock; 123 char valid; /* !=0 if following fields are valid */ 124 unsigned long last_updated; /* In jiffies */ 125 126 u8 voltage_in[4]; /* Register values; [0] = VDD */ 127 u8 voltage_min[4]; /* Register values; [0] = VDD */ 128 u8 voltage_max[4]; /* Register values; [0] = VDD */ 129 u8 fan_in[2]; 130 u8 fan_min[2]; 131 u8 fan_div[2]; /* Register encoding, shifted right */ 132 u8 fan_auto1; /* Boolean */ 133 u8 temp_in; /* Register values */ 134 u8 temp_max; /* Register values */ 135 u8 temp_hyst; /* Register values */ 136 u8 alarms; /* Register value */ 137 u8 alarm_mask; 138 u8 beep_mask; /* Register value */ 139 u8 beep_enable; /* Boolean */ 140 }; 141 142 /* 143 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 144 * GL518 uses a high-byte first convention, which is exactly opposite to 145 * the SMBus standard. 146 */ 147 static int gl518_read_value(struct i2c_client *client, u8 reg) 148 { 149 if ((reg >= 0x07) && (reg <= 0x0c)) 150 return i2c_smbus_read_word_swapped(client, reg); 151 else 152 return i2c_smbus_read_byte_data(client, reg); 153 } 154 155 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 156 { 157 if ((reg >= 0x07) && (reg <= 0x0c)) 158 return i2c_smbus_write_word_swapped(client, reg, value); 159 else 160 return i2c_smbus_write_byte_data(client, reg, value); 161 } 162 163 static struct gl518_data *gl518_update_device(struct device *dev) 164 { 165 struct gl518_data *data = dev_get_drvdata(dev); 166 struct i2c_client *client = data->client; 167 int val; 168 169 mutex_lock(&data->update_lock); 170 171 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 172 || !data->valid) { 173 dev_dbg(&client->dev, "Starting gl518 update\n"); 174 175 data->alarms = gl518_read_value(client, GL518_REG_INT); 176 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 177 178 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 179 data->voltage_min[0] = val & 0xff; 180 data->voltage_max[0] = (val >> 8) & 0xff; 181 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 182 data->voltage_min[1] = val & 0xff; 183 data->voltage_max[1] = (val >> 8) & 0xff; 184 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 185 data->voltage_min[2] = val & 0xff; 186 data->voltage_max[2] = (val >> 8) & 0xff; 187 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 188 data->voltage_min[3] = val & 0xff; 189 data->voltage_max[3] = (val >> 8) & 0xff; 190 191 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 192 data->fan_in[0] = (val >> 8) & 0xff; 193 data->fan_in[1] = val & 0xff; 194 195 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 196 data->fan_min[0] = (val >> 8) & 0xff; 197 data->fan_min[1] = val & 0xff; 198 199 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 200 data->temp_max = 201 gl518_read_value(client, GL518_REG_TEMP_MAX); 202 data->temp_hyst = 203 gl518_read_value(client, GL518_REG_TEMP_HYST); 204 205 val = gl518_read_value(client, GL518_REG_MISC); 206 data->fan_div[0] = (val >> 6) & 0x03; 207 data->fan_div[1] = (val >> 4) & 0x03; 208 data->fan_auto1 = (val >> 3) & 0x01; 209 210 data->alarms &= data->alarm_mask; 211 212 val = gl518_read_value(client, GL518_REG_CONF); 213 data->beep_enable = (val >> 2) & 1; 214 215 if (data->type != gl518sm_r00) { 216 data->voltage_in[0] = 217 gl518_read_value(client, GL518_REG_VDD); 218 data->voltage_in[1] = 219 gl518_read_value(client, GL518_REG_VIN1); 220 data->voltage_in[2] = 221 gl518_read_value(client, GL518_REG_VIN2); 222 } 223 data->voltage_in[3] = 224 gl518_read_value(client, GL518_REG_VIN3); 225 226 data->last_updated = jiffies; 227 data->valid = 1; 228 } 229 230 mutex_unlock(&data->update_lock); 231 232 return data; 233 } 234 235 /* 236 * Sysfs stuff 237 */ 238 239 #define show(type, suffix, value) \ 240 static ssize_t show_##suffix(struct device *dev, \ 241 struct device_attribute *attr, char *buf) \ 242 { \ 243 struct gl518_data *data = gl518_update_device(dev); \ 244 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 245 } 246 247 show(TEMP, temp_input1, temp_in); 248 show(TEMP, temp_max1, temp_max); 249 show(TEMP, temp_hyst1, temp_hyst); 250 show(BOOL, fan_auto1, fan_auto1); 251 show(VDD, in_input0, voltage_in[0]); 252 show(IN, in_input1, voltage_in[1]); 253 show(IN, in_input2, voltage_in[2]); 254 show(IN, in_input3, voltage_in[3]); 255 show(VDD, in_min0, voltage_min[0]); 256 show(IN, in_min1, voltage_min[1]); 257 show(IN, in_min2, voltage_min[2]); 258 show(IN, in_min3, voltage_min[3]); 259 show(VDD, in_max0, voltage_max[0]); 260 show(IN, in_max1, voltage_max[1]); 261 show(IN, in_max2, voltage_max[2]); 262 show(IN, in_max3, voltage_max[3]); 263 show(RAW, alarms, alarms); 264 show(BOOL, beep_enable, beep_enable); 265 show(BEEP_MASK, beep_mask, beep_mask); 266 267 static ssize_t fan_input_show(struct device *dev, 268 struct device_attribute *attr, char *buf) 269 { 270 int nr = to_sensor_dev_attr(attr)->index; 271 struct gl518_data *data = gl518_update_device(dev); 272 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 273 DIV_FROM_REG(data->fan_div[nr]))); 274 } 275 276 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 277 char *buf) 278 { 279 int nr = to_sensor_dev_attr(attr)->index; 280 struct gl518_data *data = gl518_update_device(dev); 281 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 282 DIV_FROM_REG(data->fan_div[nr]))); 283 } 284 285 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, 286 char *buf) 287 { 288 int nr = to_sensor_dev_attr(attr)->index; 289 struct gl518_data *data = gl518_update_device(dev); 290 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 291 } 292 293 #define set(type, suffix, value, reg) \ 294 static ssize_t set_##suffix(struct device *dev, \ 295 struct device_attribute *attr, \ 296 const char *buf, size_t count) \ 297 { \ 298 struct gl518_data *data = dev_get_drvdata(dev); \ 299 struct i2c_client *client = data->client; \ 300 long val; \ 301 int err = kstrtol(buf, 10, &val); \ 302 if (err) \ 303 return err; \ 304 \ 305 mutex_lock(&data->update_lock); \ 306 data->value = type##_TO_REG(val); \ 307 gl518_write_value(client, reg, data->value); \ 308 mutex_unlock(&data->update_lock); \ 309 return count; \ 310 } 311 312 #define set_bits(type, suffix, value, reg, mask, shift) \ 313 static ssize_t set_##suffix(struct device *dev, \ 314 struct device_attribute *attr, \ 315 const char *buf, size_t count) \ 316 { \ 317 struct gl518_data *data = dev_get_drvdata(dev); \ 318 struct i2c_client *client = data->client; \ 319 int regvalue; \ 320 unsigned long val; \ 321 int err = kstrtoul(buf, 10, &val); \ 322 if (err) \ 323 return err; \ 324 \ 325 mutex_lock(&data->update_lock); \ 326 regvalue = gl518_read_value(client, reg); \ 327 data->value = type##_TO_REG(val); \ 328 regvalue = (regvalue & ~mask) | (data->value << shift); \ 329 gl518_write_value(client, reg, regvalue); \ 330 mutex_unlock(&data->update_lock); \ 331 return count; \ 332 } 333 334 #define set_low(type, suffix, value, reg) \ 335 set_bits(type, suffix, value, reg, 0x00ff, 0) 336 #define set_high(type, suffix, value, reg) \ 337 set_bits(type, suffix, value, reg, 0xff00, 8) 338 339 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 340 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 341 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 342 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 343 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 344 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 345 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 346 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 347 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 348 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 349 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 350 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 351 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 352 353 static ssize_t fan_min_store(struct device *dev, 354 struct device_attribute *attr, const char *buf, 355 size_t count) 356 { 357 struct gl518_data *data = dev_get_drvdata(dev); 358 struct i2c_client *client = data->client; 359 int nr = to_sensor_dev_attr(attr)->index; 360 int regvalue; 361 unsigned long val; 362 int err; 363 364 err = kstrtoul(buf, 10, &val); 365 if (err) 366 return err; 367 368 mutex_lock(&data->update_lock); 369 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 370 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 371 regvalue = (regvalue & (0xff << (8 * nr))) 372 | (data->fan_min[nr] << (8 * (1 - nr))); 373 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 374 375 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 376 if (data->fan_min[nr] == 0) 377 data->alarm_mask &= ~(0x20 << nr); 378 else 379 data->alarm_mask |= (0x20 << nr); 380 data->beep_mask &= data->alarm_mask; 381 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 382 383 mutex_unlock(&data->update_lock); 384 return count; 385 } 386 387 static ssize_t fan_div_store(struct device *dev, 388 struct device_attribute *attr, const char *buf, 389 size_t count) 390 { 391 struct gl518_data *data = dev_get_drvdata(dev); 392 struct i2c_client *client = data->client; 393 int nr = to_sensor_dev_attr(attr)->index; 394 int regvalue; 395 unsigned long val; 396 int err; 397 398 err = kstrtoul(buf, 10, &val); 399 if (err) 400 return err; 401 402 switch (val) { 403 case 1: 404 val = 0; 405 break; 406 case 2: 407 val = 1; 408 break; 409 case 4: 410 val = 2; 411 break; 412 case 8: 413 val = 3; 414 break; 415 default: 416 dev_err(dev, 417 "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n", 418 val); 419 return -EINVAL; 420 } 421 422 mutex_lock(&data->update_lock); 423 regvalue = gl518_read_value(client, GL518_REG_MISC); 424 data->fan_div[nr] = val; 425 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 426 | (data->fan_div[nr] << (6 - 2 * nr)); 427 gl518_write_value(client, GL518_REG_MISC, regvalue); 428 mutex_unlock(&data->update_lock); 429 return count; 430 } 431 432 static DEVICE_ATTR(temp1_input, 0444, show_temp_input1, NULL); 433 static DEVICE_ATTR(temp1_max, 0644, show_temp_max1, set_temp_max1); 434 static DEVICE_ATTR(temp1_max_hyst, 0644, 435 show_temp_hyst1, set_temp_hyst1); 436 static DEVICE_ATTR(fan1_auto, 0644, show_fan_auto1, set_fan_auto1); 437 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); 438 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); 439 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 440 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 441 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); 442 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); 443 static DEVICE_ATTR(in0_input, 0444, show_in_input0, NULL); 444 static DEVICE_ATTR(in1_input, 0444, show_in_input1, NULL); 445 static DEVICE_ATTR(in2_input, 0444, show_in_input2, NULL); 446 static DEVICE_ATTR(in3_input, 0444, show_in_input3, NULL); 447 static DEVICE_ATTR(in0_min, 0644, show_in_min0, set_in_min0); 448 static DEVICE_ATTR(in1_min, 0644, show_in_min1, set_in_min1); 449 static DEVICE_ATTR(in2_min, 0644, show_in_min2, set_in_min2); 450 static DEVICE_ATTR(in3_min, 0644, show_in_min3, set_in_min3); 451 static DEVICE_ATTR(in0_max, 0644, show_in_max0, set_in_max0); 452 static DEVICE_ATTR(in1_max, 0644, show_in_max1, set_in_max1); 453 static DEVICE_ATTR(in2_max, 0644, show_in_max2, set_in_max2); 454 static DEVICE_ATTR(in3_max, 0644, show_in_max3, set_in_max3); 455 static DEVICE_ATTR(alarms, 0444, show_alarms, NULL); 456 static DEVICE_ATTR(beep_enable, 0644, 457 show_beep_enable, set_beep_enable); 458 static DEVICE_ATTR(beep_mask, 0644, 459 show_beep_mask, set_beep_mask); 460 461 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 462 char *buf) 463 { 464 int bitnr = to_sensor_dev_attr(attr)->index; 465 struct gl518_data *data = gl518_update_device(dev); 466 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 467 } 468 469 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 470 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 471 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 472 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 473 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 474 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5); 475 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6); 476 477 static ssize_t beep_show(struct device *dev, struct device_attribute *attr, 478 char *buf) 479 { 480 int bitnr = to_sensor_dev_attr(attr)->index; 481 struct gl518_data *data = gl518_update_device(dev); 482 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 483 } 484 485 static ssize_t beep_store(struct device *dev, struct device_attribute *attr, 486 const char *buf, size_t count) 487 { 488 struct gl518_data *data = dev_get_drvdata(dev); 489 struct i2c_client *client = data->client; 490 int bitnr = to_sensor_dev_attr(attr)->index; 491 unsigned long bit; 492 int err; 493 494 err = kstrtoul(buf, 10, &bit); 495 if (err) 496 return err; 497 498 if (bit & ~1) 499 return -EINVAL; 500 501 mutex_lock(&data->update_lock); 502 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 503 if (bit) 504 data->beep_mask |= (1 << bitnr); 505 else 506 data->beep_mask &= ~(1 << bitnr); 507 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 508 mutex_unlock(&data->update_lock); 509 return count; 510 } 511 512 static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0); 513 static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1); 514 static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2); 515 static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3); 516 static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4); 517 static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5); 518 static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6); 519 520 static struct attribute *gl518_attributes[] = { 521 &dev_attr_in3_input.attr, 522 &dev_attr_in0_min.attr, 523 &dev_attr_in1_min.attr, 524 &dev_attr_in2_min.attr, 525 &dev_attr_in3_min.attr, 526 &dev_attr_in0_max.attr, 527 &dev_attr_in1_max.attr, 528 &dev_attr_in2_max.attr, 529 &dev_attr_in3_max.attr, 530 &sensor_dev_attr_in0_alarm.dev_attr.attr, 531 &sensor_dev_attr_in1_alarm.dev_attr.attr, 532 &sensor_dev_attr_in2_alarm.dev_attr.attr, 533 &sensor_dev_attr_in3_alarm.dev_attr.attr, 534 &sensor_dev_attr_in0_beep.dev_attr.attr, 535 &sensor_dev_attr_in1_beep.dev_attr.attr, 536 &sensor_dev_attr_in2_beep.dev_attr.attr, 537 &sensor_dev_attr_in3_beep.dev_attr.attr, 538 539 &dev_attr_fan1_auto.attr, 540 &sensor_dev_attr_fan1_input.dev_attr.attr, 541 &sensor_dev_attr_fan2_input.dev_attr.attr, 542 &sensor_dev_attr_fan1_min.dev_attr.attr, 543 &sensor_dev_attr_fan2_min.dev_attr.attr, 544 &sensor_dev_attr_fan1_div.dev_attr.attr, 545 &sensor_dev_attr_fan2_div.dev_attr.attr, 546 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 547 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 548 &sensor_dev_attr_fan1_beep.dev_attr.attr, 549 &sensor_dev_attr_fan2_beep.dev_attr.attr, 550 551 &dev_attr_temp1_input.attr, 552 &dev_attr_temp1_max.attr, 553 &dev_attr_temp1_max_hyst.attr, 554 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 555 &sensor_dev_attr_temp1_beep.dev_attr.attr, 556 557 &dev_attr_alarms.attr, 558 &dev_attr_beep_enable.attr, 559 &dev_attr_beep_mask.attr, 560 NULL 561 }; 562 563 static const struct attribute_group gl518_group = { 564 .attrs = gl518_attributes, 565 }; 566 567 static struct attribute *gl518_attributes_r80[] = { 568 &dev_attr_in0_input.attr, 569 &dev_attr_in1_input.attr, 570 &dev_attr_in2_input.attr, 571 NULL 572 }; 573 574 static const struct attribute_group gl518_group_r80 = { 575 .attrs = gl518_attributes_r80, 576 }; 577 578 /* 579 * Real code 580 */ 581 582 /* Return 0 if detection is successful, -ENODEV otherwise */ 583 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 584 { 585 struct i2c_adapter *adapter = client->adapter; 586 int rev; 587 588 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 589 I2C_FUNC_SMBUS_WORD_DATA)) 590 return -ENODEV; 591 592 /* Now, we do the remaining detection. */ 593 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 594 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 595 return -ENODEV; 596 597 /* Determine the chip type. */ 598 rev = gl518_read_value(client, GL518_REG_REVISION); 599 if (rev != 0x00 && rev != 0x80) 600 return -ENODEV; 601 602 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 603 604 return 0; 605 } 606 607 /* 608 * Called when we have found a new GL518SM. 609 * Note that we preserve D4:NoFan2 and D2:beep_enable. 610 */ 611 static void gl518_init_client(struct i2c_client *client) 612 { 613 /* Make sure we leave D7:Reset untouched */ 614 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 615 616 /* Comparator mode (D3=0), standby mode (D6=0) */ 617 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 618 619 /* Never interrupts */ 620 gl518_write_value(client, GL518_REG_MASK, 0x00); 621 622 /* Clear status register (D5=1), start (D6=1) */ 623 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 624 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 625 } 626 627 static int gl518_probe(struct i2c_client *client, 628 const struct i2c_device_id *id) 629 { 630 struct device *dev = &client->dev; 631 struct device *hwmon_dev; 632 struct gl518_data *data; 633 int revision; 634 635 data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL); 636 if (!data) 637 return -ENOMEM; 638 639 data->client = client; 640 revision = gl518_read_value(client, GL518_REG_REVISION); 641 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 642 mutex_init(&data->update_lock); 643 644 /* Initialize the GL518SM chip */ 645 data->alarm_mask = 0xff; 646 gl518_init_client(client); 647 648 /* sysfs hooks */ 649 data->groups[0] = &gl518_group; 650 if (data->type == gl518sm_r80) 651 data->groups[1] = &gl518_group_r80; 652 653 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 654 data, data->groups); 655 return PTR_ERR_OR_ZERO(hwmon_dev); 656 } 657 658 static const struct i2c_device_id gl518_id[] = { 659 { "gl518sm", 0 }, 660 { } 661 }; 662 MODULE_DEVICE_TABLE(i2c, gl518_id); 663 664 static struct i2c_driver gl518_driver = { 665 .class = I2C_CLASS_HWMON, 666 .driver = { 667 .name = "gl518sm", 668 }, 669 .probe = gl518_probe, 670 .id_table = gl518_id, 671 .detect = gl518_detect, 672 .address_list = normal_i2c, 673 }; 674 675 module_i2c_driver(gl518_driver); 676 677 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 678 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 679 "Hong-Gunn Chew <hglinux@gunnet.org>"); 680 MODULE_DESCRIPTION("GL518SM driver"); 681 MODULE_LICENSE("GPL"); 682