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_TO_REG(val) clamp_val(((((val) < 0 ? \ 90 (val) - 500 : \ 91 (val) + 500) / 1000) + 119), 0, 255) 92 #define TEMP_FROM_REG(val) (((val) - 119) * 1000) 93 94 static inline u8 FAN_TO_REG(long rpm, int div) 95 { 96 long rpmdiv; 97 if (rpm == 0) 98 return 0; 99 rpmdiv = clamp_val(rpm, 1, 960000) * div; 100 return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255); 101 } 102 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div)))) 103 104 #define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255) 105 #define IN_FROM_REG(val) ((val) * 19) 106 107 #define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255) 108 #define VDD_FROM_REG(val) (((val) * 95 + 2) / 4) 109 110 #define DIV_FROM_REG(val) (1 << (val)) 111 112 #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) 113 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) 114 115 /* Each client has this additional data */ 116 struct gl518_data { 117 struct i2c_client *client; 118 const struct attribute_group *groups[3]; 119 enum chips type; 120 121 struct mutex update_lock; 122 char valid; /* !=0 if following fields are valid */ 123 unsigned long last_updated; /* In jiffies */ 124 125 u8 voltage_in[4]; /* Register values; [0] = VDD */ 126 u8 voltage_min[4]; /* Register values; [0] = VDD */ 127 u8 voltage_max[4]; /* Register values; [0] = VDD */ 128 u8 fan_in[2]; 129 u8 fan_min[2]; 130 u8 fan_div[2]; /* Register encoding, shifted right */ 131 u8 fan_auto1; /* Boolean */ 132 u8 temp_in; /* Register values */ 133 u8 temp_max; /* Register values */ 134 u8 temp_hyst; /* Register values */ 135 u8 alarms; /* Register value */ 136 u8 alarm_mask; 137 u8 beep_mask; /* Register value */ 138 u8 beep_enable; /* Boolean */ 139 }; 140 141 /* 142 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 143 * GL518 uses a high-byte first convention, which is exactly opposite to 144 * the SMBus standard. 145 */ 146 static int gl518_read_value(struct i2c_client *client, u8 reg) 147 { 148 if ((reg >= 0x07) && (reg <= 0x0c)) 149 return i2c_smbus_read_word_swapped(client, reg); 150 else 151 return i2c_smbus_read_byte_data(client, reg); 152 } 153 154 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 155 { 156 if ((reg >= 0x07) && (reg <= 0x0c)) 157 return i2c_smbus_write_word_swapped(client, reg, value); 158 else 159 return i2c_smbus_write_byte_data(client, reg, value); 160 } 161 162 static struct gl518_data *gl518_update_device(struct device *dev) 163 { 164 struct gl518_data *data = dev_get_drvdata(dev); 165 struct i2c_client *client = data->client; 166 int val; 167 168 mutex_lock(&data->update_lock); 169 170 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 171 || !data->valid) { 172 dev_dbg(&client->dev, "Starting gl518 update\n"); 173 174 data->alarms = gl518_read_value(client, GL518_REG_INT); 175 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 176 177 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 178 data->voltage_min[0] = val & 0xff; 179 data->voltage_max[0] = (val >> 8) & 0xff; 180 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 181 data->voltage_min[1] = val & 0xff; 182 data->voltage_max[1] = (val >> 8) & 0xff; 183 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 184 data->voltage_min[2] = val & 0xff; 185 data->voltage_max[2] = (val >> 8) & 0xff; 186 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 187 data->voltage_min[3] = val & 0xff; 188 data->voltage_max[3] = (val >> 8) & 0xff; 189 190 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 191 data->fan_in[0] = (val >> 8) & 0xff; 192 data->fan_in[1] = val & 0xff; 193 194 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 195 data->fan_min[0] = (val >> 8) & 0xff; 196 data->fan_min[1] = val & 0xff; 197 198 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 199 data->temp_max = 200 gl518_read_value(client, GL518_REG_TEMP_MAX); 201 data->temp_hyst = 202 gl518_read_value(client, GL518_REG_TEMP_HYST); 203 204 val = gl518_read_value(client, GL518_REG_MISC); 205 data->fan_div[0] = (val >> 6) & 0x03; 206 data->fan_div[1] = (val >> 4) & 0x03; 207 data->fan_auto1 = (val >> 3) & 0x01; 208 209 data->alarms &= data->alarm_mask; 210 211 val = gl518_read_value(client, GL518_REG_CONF); 212 data->beep_enable = (val >> 2) & 1; 213 214 if (data->type != gl518sm_r00) { 215 data->voltage_in[0] = 216 gl518_read_value(client, GL518_REG_VDD); 217 data->voltage_in[1] = 218 gl518_read_value(client, GL518_REG_VIN1); 219 data->voltage_in[2] = 220 gl518_read_value(client, GL518_REG_VIN2); 221 } 222 data->voltage_in[3] = 223 gl518_read_value(client, GL518_REG_VIN3); 224 225 data->last_updated = jiffies; 226 data->valid = 1; 227 } 228 229 mutex_unlock(&data->update_lock); 230 231 return data; 232 } 233 234 /* 235 * Sysfs stuff 236 */ 237 238 #define show(type, suffix, value) \ 239 static ssize_t show_##suffix(struct device *dev, \ 240 struct device_attribute *attr, char *buf) \ 241 { \ 242 struct gl518_data *data = gl518_update_device(dev); \ 243 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 244 } 245 246 show(TEMP, temp_input1, temp_in); 247 show(TEMP, temp_max1, temp_max); 248 show(TEMP, temp_hyst1, temp_hyst); 249 show(BOOL, fan_auto1, fan_auto1); 250 show(VDD, in_input0, voltage_in[0]); 251 show(IN, in_input1, voltage_in[1]); 252 show(IN, in_input2, voltage_in[2]); 253 show(IN, in_input3, voltage_in[3]); 254 show(VDD, in_min0, voltage_min[0]); 255 show(IN, in_min1, voltage_min[1]); 256 show(IN, in_min2, voltage_min[2]); 257 show(IN, in_min3, voltage_min[3]); 258 show(VDD, in_max0, voltage_max[0]); 259 show(IN, in_max1, voltage_max[1]); 260 show(IN, in_max2, voltage_max[2]); 261 show(IN, in_max3, voltage_max[3]); 262 show(RAW, alarms, alarms); 263 show(BOOL, beep_enable, beep_enable); 264 show(BEEP_MASK, beep_mask, beep_mask); 265 266 static ssize_t show_fan_input(struct device *dev, 267 struct device_attribute *attr, char *buf) 268 { 269 int nr = to_sensor_dev_attr(attr)->index; 270 struct gl518_data *data = gl518_update_device(dev); 271 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 272 DIV_FROM_REG(data->fan_div[nr]))); 273 } 274 275 static ssize_t show_fan_min(struct device *dev, 276 struct device_attribute *attr, char *buf) 277 { 278 int nr = to_sensor_dev_attr(attr)->index; 279 struct gl518_data *data = gl518_update_device(dev); 280 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 281 DIV_FROM_REG(data->fan_div[nr]))); 282 } 283 284 static ssize_t show_fan_div(struct device *dev, 285 struct device_attribute *attr, char *buf) 286 { 287 int nr = to_sensor_dev_attr(attr)->index; 288 struct gl518_data *data = gl518_update_device(dev); 289 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 290 } 291 292 #define set(type, suffix, value, reg) \ 293 static ssize_t set_##suffix(struct device *dev, \ 294 struct device_attribute *attr, \ 295 const char *buf, size_t count) \ 296 { \ 297 struct gl518_data *data = dev_get_drvdata(dev); \ 298 struct i2c_client *client = data->client; \ 299 long val; \ 300 int err = kstrtol(buf, 10, &val); \ 301 if (err) \ 302 return err; \ 303 \ 304 mutex_lock(&data->update_lock); \ 305 data->value = type##_TO_REG(val); \ 306 gl518_write_value(client, reg, data->value); \ 307 mutex_unlock(&data->update_lock); \ 308 return count; \ 309 } 310 311 #define set_bits(type, suffix, value, reg, mask, shift) \ 312 static ssize_t set_##suffix(struct device *dev, \ 313 struct device_attribute *attr, \ 314 const char *buf, size_t count) \ 315 { \ 316 struct gl518_data *data = dev_get_drvdata(dev); \ 317 struct i2c_client *client = data->client; \ 318 int regvalue; \ 319 unsigned long val; \ 320 int err = kstrtoul(buf, 10, &val); \ 321 if (err) \ 322 return err; \ 323 \ 324 mutex_lock(&data->update_lock); \ 325 regvalue = gl518_read_value(client, reg); \ 326 data->value = type##_TO_REG(val); \ 327 regvalue = (regvalue & ~mask) | (data->value << shift); \ 328 gl518_write_value(client, reg, regvalue); \ 329 mutex_unlock(&data->update_lock); \ 330 return count; \ 331 } 332 333 #define set_low(type, suffix, value, reg) \ 334 set_bits(type, suffix, value, reg, 0x00ff, 0) 335 #define set_high(type, suffix, value, reg) \ 336 set_bits(type, suffix, value, reg, 0xff00, 8) 337 338 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 339 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 340 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 341 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 342 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 343 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 344 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 345 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 346 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 347 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 348 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 349 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 350 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 351 352 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 353 const char *buf, size_t count) 354 { 355 struct gl518_data *data = dev_get_drvdata(dev); 356 struct i2c_client *client = data->client; 357 int nr = to_sensor_dev_attr(attr)->index; 358 int regvalue; 359 unsigned long val; 360 int err; 361 362 err = kstrtoul(buf, 10, &val); 363 if (err) 364 return err; 365 366 mutex_lock(&data->update_lock); 367 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 368 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 369 regvalue = (regvalue & (0xff << (8 * nr))) 370 | (data->fan_min[nr] << (8 * (1 - nr))); 371 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 372 373 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 374 if (data->fan_min[nr] == 0) 375 data->alarm_mask &= ~(0x20 << nr); 376 else 377 data->alarm_mask |= (0x20 << nr); 378 data->beep_mask &= data->alarm_mask; 379 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 380 381 mutex_unlock(&data->update_lock); 382 return count; 383 } 384 385 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 386 const char *buf, size_t count) 387 { 388 struct gl518_data *data = dev_get_drvdata(dev); 389 struct i2c_client *client = data->client; 390 int nr = to_sensor_dev_attr(attr)->index; 391 int regvalue; 392 unsigned long val; 393 int err; 394 395 err = kstrtoul(buf, 10, &val); 396 if (err) 397 return err; 398 399 switch (val) { 400 case 1: 401 val = 0; 402 break; 403 case 2: 404 val = 1; 405 break; 406 case 4: 407 val = 2; 408 break; 409 case 8: 410 val = 3; 411 break; 412 default: 413 dev_err(dev, 414 "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n", 415 val); 416 return -EINVAL; 417 } 418 419 mutex_lock(&data->update_lock); 420 regvalue = gl518_read_value(client, GL518_REG_MISC); 421 data->fan_div[nr] = val; 422 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 423 | (data->fan_div[nr] << (6 - 2 * nr)); 424 gl518_write_value(client, GL518_REG_MISC, regvalue); 425 mutex_unlock(&data->update_lock); 426 return count; 427 } 428 429 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 430 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 431 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 432 show_temp_hyst1, set_temp_hyst1); 433 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 434 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 435 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 436 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 437 show_fan_min, set_fan_min, 0); 438 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 439 show_fan_min, set_fan_min, 1); 440 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 441 show_fan_div, set_fan_div, 0); 442 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 443 show_fan_div, set_fan_div, 1); 444 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 445 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 446 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 447 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 448 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 449 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 450 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 451 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 452 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 453 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 454 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 455 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 456 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 457 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 458 show_beep_enable, set_beep_enable); 459 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 460 show_beep_mask, set_beep_mask); 461 462 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 463 char *buf) 464 { 465 int bitnr = to_sensor_dev_attr(attr)->index; 466 struct gl518_data *data = gl518_update_device(dev); 467 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 468 } 469 470 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 471 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 472 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 473 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 474 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 475 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 476 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 477 478 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 479 char *buf) 480 { 481 int bitnr = to_sensor_dev_attr(attr)->index; 482 struct gl518_data *data = gl518_update_device(dev); 483 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 484 } 485 486 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 487 const char *buf, size_t count) 488 { 489 struct gl518_data *data = dev_get_drvdata(dev); 490 struct i2c_client *client = data->client; 491 int bitnr = to_sensor_dev_attr(attr)->index; 492 unsigned long bit; 493 int err; 494 495 err = kstrtoul(buf, 10, &bit); 496 if (err) 497 return err; 498 499 if (bit & ~1) 500 return -EINVAL; 501 502 mutex_lock(&data->update_lock); 503 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 504 if (bit) 505 data->beep_mask |= (1 << bitnr); 506 else 507 data->beep_mask &= ~(1 << bitnr); 508 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 509 mutex_unlock(&data->update_lock); 510 return count; 511 } 512 513 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 514 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 515 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 516 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 517 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 518 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 519 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 520 521 static struct attribute *gl518_attributes[] = { 522 &dev_attr_in3_input.attr, 523 &dev_attr_in0_min.attr, 524 &dev_attr_in1_min.attr, 525 &dev_attr_in2_min.attr, 526 &dev_attr_in3_min.attr, 527 &dev_attr_in0_max.attr, 528 &dev_attr_in1_max.attr, 529 &dev_attr_in2_max.attr, 530 &dev_attr_in3_max.attr, 531 &sensor_dev_attr_in0_alarm.dev_attr.attr, 532 &sensor_dev_attr_in1_alarm.dev_attr.attr, 533 &sensor_dev_attr_in2_alarm.dev_attr.attr, 534 &sensor_dev_attr_in3_alarm.dev_attr.attr, 535 &sensor_dev_attr_in0_beep.dev_attr.attr, 536 &sensor_dev_attr_in1_beep.dev_attr.attr, 537 &sensor_dev_attr_in2_beep.dev_attr.attr, 538 &sensor_dev_attr_in3_beep.dev_attr.attr, 539 540 &dev_attr_fan1_auto.attr, 541 &sensor_dev_attr_fan1_input.dev_attr.attr, 542 &sensor_dev_attr_fan2_input.dev_attr.attr, 543 &sensor_dev_attr_fan1_min.dev_attr.attr, 544 &sensor_dev_attr_fan2_min.dev_attr.attr, 545 &sensor_dev_attr_fan1_div.dev_attr.attr, 546 &sensor_dev_attr_fan2_div.dev_attr.attr, 547 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 548 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 549 &sensor_dev_attr_fan1_beep.dev_attr.attr, 550 &sensor_dev_attr_fan2_beep.dev_attr.attr, 551 552 &dev_attr_temp1_input.attr, 553 &dev_attr_temp1_max.attr, 554 &dev_attr_temp1_max_hyst.attr, 555 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 556 &sensor_dev_attr_temp1_beep.dev_attr.attr, 557 558 &dev_attr_alarms.attr, 559 &dev_attr_beep_enable.attr, 560 &dev_attr_beep_mask.attr, 561 NULL 562 }; 563 564 static const struct attribute_group gl518_group = { 565 .attrs = gl518_attributes, 566 }; 567 568 static struct attribute *gl518_attributes_r80[] = { 569 &dev_attr_in0_input.attr, 570 &dev_attr_in1_input.attr, 571 &dev_attr_in2_input.attr, 572 NULL 573 }; 574 575 static const struct attribute_group gl518_group_r80 = { 576 .attrs = gl518_attributes_r80, 577 }; 578 579 /* 580 * Real code 581 */ 582 583 /* Return 0 if detection is successful, -ENODEV otherwise */ 584 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 585 { 586 struct i2c_adapter *adapter = client->adapter; 587 int rev; 588 589 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 590 I2C_FUNC_SMBUS_WORD_DATA)) 591 return -ENODEV; 592 593 /* Now, we do the remaining detection. */ 594 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 595 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 596 return -ENODEV; 597 598 /* Determine the chip type. */ 599 rev = gl518_read_value(client, GL518_REG_REVISION); 600 if (rev != 0x00 && rev != 0x80) 601 return -ENODEV; 602 603 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 604 605 return 0; 606 } 607 608 /* 609 * Called when we have found a new GL518SM. 610 * Note that we preserve D4:NoFan2 and D2:beep_enable. 611 */ 612 static void gl518_init_client(struct i2c_client *client) 613 { 614 /* Make sure we leave D7:Reset untouched */ 615 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 616 617 /* Comparator mode (D3=0), standby mode (D6=0) */ 618 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 619 620 /* Never interrupts */ 621 gl518_write_value(client, GL518_REG_MASK, 0x00); 622 623 /* Clear status register (D5=1), start (D6=1) */ 624 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 625 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 626 } 627 628 static int gl518_probe(struct i2c_client *client, 629 const struct i2c_device_id *id) 630 { 631 struct device *dev = &client->dev; 632 struct device *hwmon_dev; 633 struct gl518_data *data; 634 int revision; 635 636 data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL); 637 if (!data) 638 return -ENOMEM; 639 640 data->client = client; 641 revision = gl518_read_value(client, GL518_REG_REVISION); 642 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 643 mutex_init(&data->update_lock); 644 645 /* Initialize the GL518SM chip */ 646 data->alarm_mask = 0xff; 647 gl518_init_client(client); 648 649 /* sysfs hooks */ 650 data->groups[0] = &gl518_group; 651 if (data->type == gl518sm_r80) 652 data->groups[1] = &gl518_group_r80; 653 654 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 655 data, data->groups); 656 return PTR_ERR_OR_ZERO(hwmon_dev); 657 } 658 659 static const struct i2c_device_id gl518_id[] = { 660 { "gl518sm", 0 }, 661 { } 662 }; 663 MODULE_DEVICE_TABLE(i2c, gl518_id); 664 665 static struct i2c_driver gl518_driver = { 666 .class = I2C_CLASS_HWMON, 667 .driver = { 668 .name = "gl518sm", 669 }, 670 .probe = gl518_probe, 671 .id_table = gl518_id, 672 .detect = gl518_detect, 673 .address_list = normal_i2c, 674 }; 675 676 module_i2c_driver(gl518_driver); 677 678 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 679 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 680 "Hong-Gunn Chew <hglinux@gunnet.org>"); 681 MODULE_DESCRIPTION("GL518SM driver"); 682 MODULE_LICENSE("GPL"); 683