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 <khali@linux-fr.org> 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) SENSORS_LIMIT(((((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 = SENSORS_LIMIT(rpm, 1, 960000) * div; 100 return SENSORS_LIMIT((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) SENSORS_LIMIT((((val) + 9) / 19), 0, 255) 105 #define IN_FROM_REG(val) ((val) * 19) 106 107 #define VDD_TO_REG(val) SENSORS_LIMIT((((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 device *hwmon_dev; 118 enum chips type; 119 120 struct mutex update_lock; 121 char valid; /* !=0 if following fields are valid */ 122 unsigned long last_updated; /* In jiffies */ 123 124 u8 voltage_in[4]; /* Register values; [0] = VDD */ 125 u8 voltage_min[4]; /* Register values; [0] = VDD */ 126 u8 voltage_max[4]; /* Register values; [0] = VDD */ 127 u8 fan_in[2]; 128 u8 fan_min[2]; 129 u8 fan_div[2]; /* Register encoding, shifted right */ 130 u8 fan_auto1; /* Boolean */ 131 u8 temp_in; /* Register values */ 132 u8 temp_max; /* Register values */ 133 u8 temp_hyst; /* Register values */ 134 u8 alarms; /* Register value */ 135 u8 alarm_mask; 136 u8 beep_mask; /* Register value */ 137 u8 beep_enable; /* Boolean */ 138 }; 139 140 static int gl518_probe(struct i2c_client *client, 141 const struct i2c_device_id *id); 142 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info); 143 static void gl518_init_client(struct i2c_client *client); 144 static int gl518_remove(struct i2c_client *client); 145 static int gl518_read_value(struct i2c_client *client, u8 reg); 146 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value); 147 static struct gl518_data *gl518_update_device(struct device *dev); 148 149 static const struct i2c_device_id gl518_id[] = { 150 { "gl518sm", 0 }, 151 { } 152 }; 153 MODULE_DEVICE_TABLE(i2c, gl518_id); 154 155 /* This is the driver that will be inserted */ 156 static struct i2c_driver gl518_driver = { 157 .class = I2C_CLASS_HWMON, 158 .driver = { 159 .name = "gl518sm", 160 }, 161 .probe = gl518_probe, 162 .remove = gl518_remove, 163 .id_table = gl518_id, 164 .detect = gl518_detect, 165 .address_list = normal_i2c, 166 }; 167 168 /* 169 * Sysfs stuff 170 */ 171 172 #define show(type, suffix, value) \ 173 static ssize_t show_##suffix(struct device *dev, \ 174 struct device_attribute *attr, char *buf) \ 175 { \ 176 struct gl518_data *data = gl518_update_device(dev); \ 177 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 178 } 179 180 show(TEMP, temp_input1, temp_in); 181 show(TEMP, temp_max1, temp_max); 182 show(TEMP, temp_hyst1, temp_hyst); 183 show(BOOL, fan_auto1, fan_auto1); 184 show(VDD, in_input0, voltage_in[0]); 185 show(IN, in_input1, voltage_in[1]); 186 show(IN, in_input2, voltage_in[2]); 187 show(IN, in_input3, voltage_in[3]); 188 show(VDD, in_min0, voltage_min[0]); 189 show(IN, in_min1, voltage_min[1]); 190 show(IN, in_min2, voltage_min[2]); 191 show(IN, in_min3, voltage_min[3]); 192 show(VDD, in_max0, voltage_max[0]); 193 show(IN, in_max1, voltage_max[1]); 194 show(IN, in_max2, voltage_max[2]); 195 show(IN, in_max3, voltage_max[3]); 196 show(RAW, alarms, alarms); 197 show(BOOL, beep_enable, beep_enable); 198 show(BEEP_MASK, beep_mask, beep_mask); 199 200 static ssize_t show_fan_input(struct device *dev, 201 struct device_attribute *attr, char *buf) 202 { 203 int nr = to_sensor_dev_attr(attr)->index; 204 struct gl518_data *data = gl518_update_device(dev); 205 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 206 DIV_FROM_REG(data->fan_div[nr]))); 207 } 208 209 static ssize_t show_fan_min(struct device *dev, 210 struct device_attribute *attr, char *buf) 211 { 212 int nr = to_sensor_dev_attr(attr)->index; 213 struct gl518_data *data = gl518_update_device(dev); 214 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 215 DIV_FROM_REG(data->fan_div[nr]))); 216 } 217 218 static ssize_t show_fan_div(struct device *dev, 219 struct device_attribute *attr, char *buf) 220 { 221 int nr = to_sensor_dev_attr(attr)->index; 222 struct gl518_data *data = gl518_update_device(dev); 223 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 224 } 225 226 #define set(type, suffix, value, reg) \ 227 static ssize_t set_##suffix(struct device *dev, \ 228 struct device_attribute *attr, \ 229 const char *buf, size_t count) \ 230 { \ 231 struct i2c_client *client = to_i2c_client(dev); \ 232 struct gl518_data *data = i2c_get_clientdata(client); \ 233 long val; \ 234 int err = kstrtol(buf, 10, &val); \ 235 if (err) \ 236 return err; \ 237 \ 238 mutex_lock(&data->update_lock); \ 239 data->value = type##_TO_REG(val); \ 240 gl518_write_value(client, reg, data->value); \ 241 mutex_unlock(&data->update_lock); \ 242 return count; \ 243 } 244 245 #define set_bits(type, suffix, value, reg, mask, shift) \ 246 static ssize_t set_##suffix(struct device *dev, \ 247 struct device_attribute *attr, \ 248 const char *buf, size_t count) \ 249 { \ 250 struct i2c_client *client = to_i2c_client(dev); \ 251 struct gl518_data *data = i2c_get_clientdata(client); \ 252 int regvalue; \ 253 unsigned long val; \ 254 int err = kstrtoul(buf, 10, &val); \ 255 if (err) \ 256 return err; \ 257 \ 258 mutex_lock(&data->update_lock); \ 259 regvalue = gl518_read_value(client, reg); \ 260 data->value = type##_TO_REG(val); \ 261 regvalue = (regvalue & ~mask) | (data->value << shift); \ 262 gl518_write_value(client, reg, regvalue); \ 263 mutex_unlock(&data->update_lock); \ 264 return count; \ 265 } 266 267 #define set_low(type, suffix, value, reg) \ 268 set_bits(type, suffix, value, reg, 0x00ff, 0) 269 #define set_high(type, suffix, value, reg) \ 270 set_bits(type, suffix, value, reg, 0xff00, 8) 271 272 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 273 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 274 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 275 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 276 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 277 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 278 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 279 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 280 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 281 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 282 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 283 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 284 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 285 286 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 287 const char *buf, size_t count) 288 { 289 struct i2c_client *client = to_i2c_client(dev); 290 struct gl518_data *data = i2c_get_clientdata(client); 291 int nr = to_sensor_dev_attr(attr)->index; 292 int regvalue; 293 unsigned long val; 294 int err; 295 296 err = kstrtoul(buf, 10, &val); 297 if (err) 298 return err; 299 300 mutex_lock(&data->update_lock); 301 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 302 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 303 regvalue = (regvalue & (0xff << (8 * nr))) 304 | (data->fan_min[nr] << (8 * (1 - nr))); 305 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 306 307 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 308 if (data->fan_min[nr] == 0) 309 data->alarm_mask &= ~(0x20 << nr); 310 else 311 data->alarm_mask |= (0x20 << nr); 312 data->beep_mask &= data->alarm_mask; 313 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 314 315 mutex_unlock(&data->update_lock); 316 return count; 317 } 318 319 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 320 const char *buf, size_t count) 321 { 322 struct i2c_client *client = to_i2c_client(dev); 323 struct gl518_data *data = i2c_get_clientdata(client); 324 int nr = to_sensor_dev_attr(attr)->index; 325 int regvalue; 326 unsigned long val; 327 int err; 328 329 err = kstrtoul(buf, 10, &val); 330 if (err) 331 return err; 332 333 switch (val) { 334 case 1: 335 val = 0; 336 break; 337 case 2: 338 val = 1; 339 break; 340 case 4: 341 val = 2; 342 break; 343 case 8: 344 val = 3; 345 break; 346 default: 347 dev_err(dev, "Invalid fan clock divider %lu, choose one " 348 "of 1, 2, 4 or 8\n", val); 349 return -EINVAL; 350 } 351 352 mutex_lock(&data->update_lock); 353 regvalue = gl518_read_value(client, GL518_REG_MISC); 354 data->fan_div[nr] = val; 355 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 356 | (data->fan_div[nr] << (6 - 2 * nr)); 357 gl518_write_value(client, GL518_REG_MISC, regvalue); 358 mutex_unlock(&data->update_lock); 359 return count; 360 } 361 362 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 363 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 364 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 365 show_temp_hyst1, set_temp_hyst1); 366 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 367 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 368 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 369 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 370 show_fan_min, set_fan_min, 0); 371 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 372 show_fan_min, set_fan_min, 1); 373 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 374 show_fan_div, set_fan_div, 0); 375 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 376 show_fan_div, set_fan_div, 1); 377 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 378 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 379 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 380 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 381 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 382 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 383 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 384 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 385 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 386 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 387 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 388 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 389 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 390 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 391 show_beep_enable, set_beep_enable); 392 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 393 show_beep_mask, set_beep_mask); 394 395 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 396 char *buf) 397 { 398 int bitnr = to_sensor_dev_attr(attr)->index; 399 struct gl518_data *data = gl518_update_device(dev); 400 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 401 } 402 403 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 404 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 405 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 406 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 407 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 408 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 409 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 410 411 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 412 char *buf) 413 { 414 int bitnr = to_sensor_dev_attr(attr)->index; 415 struct gl518_data *data = gl518_update_device(dev); 416 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 417 } 418 419 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 420 const char *buf, size_t count) 421 { 422 struct i2c_client *client = to_i2c_client(dev); 423 struct gl518_data *data = i2c_get_clientdata(client); 424 int bitnr = to_sensor_dev_attr(attr)->index; 425 unsigned long bit; 426 int err; 427 428 err = kstrtoul(buf, 10, &bit); 429 if (err) 430 return err; 431 432 if (bit & ~1) 433 return -EINVAL; 434 435 mutex_lock(&data->update_lock); 436 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 437 if (bit) 438 data->beep_mask |= (1 << bitnr); 439 else 440 data->beep_mask &= ~(1 << bitnr); 441 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 442 mutex_unlock(&data->update_lock); 443 return count; 444 } 445 446 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 447 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 448 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 449 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 450 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 451 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 452 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 453 454 static struct attribute *gl518_attributes[] = { 455 &dev_attr_in3_input.attr, 456 &dev_attr_in0_min.attr, 457 &dev_attr_in1_min.attr, 458 &dev_attr_in2_min.attr, 459 &dev_attr_in3_min.attr, 460 &dev_attr_in0_max.attr, 461 &dev_attr_in1_max.attr, 462 &dev_attr_in2_max.attr, 463 &dev_attr_in3_max.attr, 464 &sensor_dev_attr_in0_alarm.dev_attr.attr, 465 &sensor_dev_attr_in1_alarm.dev_attr.attr, 466 &sensor_dev_attr_in2_alarm.dev_attr.attr, 467 &sensor_dev_attr_in3_alarm.dev_attr.attr, 468 &sensor_dev_attr_in0_beep.dev_attr.attr, 469 &sensor_dev_attr_in1_beep.dev_attr.attr, 470 &sensor_dev_attr_in2_beep.dev_attr.attr, 471 &sensor_dev_attr_in3_beep.dev_attr.attr, 472 473 &dev_attr_fan1_auto.attr, 474 &sensor_dev_attr_fan1_input.dev_attr.attr, 475 &sensor_dev_attr_fan2_input.dev_attr.attr, 476 &sensor_dev_attr_fan1_min.dev_attr.attr, 477 &sensor_dev_attr_fan2_min.dev_attr.attr, 478 &sensor_dev_attr_fan1_div.dev_attr.attr, 479 &sensor_dev_attr_fan2_div.dev_attr.attr, 480 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 481 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 482 &sensor_dev_attr_fan1_beep.dev_attr.attr, 483 &sensor_dev_attr_fan2_beep.dev_attr.attr, 484 485 &dev_attr_temp1_input.attr, 486 &dev_attr_temp1_max.attr, 487 &dev_attr_temp1_max_hyst.attr, 488 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 489 &sensor_dev_attr_temp1_beep.dev_attr.attr, 490 491 &dev_attr_alarms.attr, 492 &dev_attr_beep_enable.attr, 493 &dev_attr_beep_mask.attr, 494 NULL 495 }; 496 497 static const struct attribute_group gl518_group = { 498 .attrs = gl518_attributes, 499 }; 500 501 static struct attribute *gl518_attributes_r80[] = { 502 &dev_attr_in0_input.attr, 503 &dev_attr_in1_input.attr, 504 &dev_attr_in2_input.attr, 505 NULL 506 }; 507 508 static const struct attribute_group gl518_group_r80 = { 509 .attrs = gl518_attributes_r80, 510 }; 511 512 /* 513 * Real code 514 */ 515 516 /* Return 0 if detection is successful, -ENODEV otherwise */ 517 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 518 { 519 struct i2c_adapter *adapter = client->adapter; 520 int rev; 521 522 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 523 I2C_FUNC_SMBUS_WORD_DATA)) 524 return -ENODEV; 525 526 /* Now, we do the remaining detection. */ 527 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 528 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 529 return -ENODEV; 530 531 /* Determine the chip type. */ 532 rev = gl518_read_value(client, GL518_REG_REVISION); 533 if (rev != 0x00 && rev != 0x80) 534 return -ENODEV; 535 536 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 537 538 return 0; 539 } 540 541 static int gl518_probe(struct i2c_client *client, 542 const struct i2c_device_id *id) 543 { 544 struct gl518_data *data; 545 int err, revision; 546 547 data = devm_kzalloc(&client->dev, sizeof(struct gl518_data), 548 GFP_KERNEL); 549 if (!data) 550 return -ENOMEM; 551 552 i2c_set_clientdata(client, data); 553 revision = gl518_read_value(client, GL518_REG_REVISION); 554 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 555 mutex_init(&data->update_lock); 556 557 /* Initialize the GL518SM chip */ 558 data->alarm_mask = 0xff; 559 gl518_init_client(client); 560 561 /* Register sysfs hooks */ 562 err = sysfs_create_group(&client->dev.kobj, &gl518_group); 563 if (err) 564 return err; 565 if (data->type == gl518sm_r80) { 566 err = sysfs_create_group(&client->dev.kobj, &gl518_group_r80); 567 if (err) 568 goto exit_remove_files; 569 } 570 571 data->hwmon_dev = hwmon_device_register(&client->dev); 572 if (IS_ERR(data->hwmon_dev)) { 573 err = PTR_ERR(data->hwmon_dev); 574 goto exit_remove_files; 575 } 576 577 return 0; 578 579 exit_remove_files: 580 sysfs_remove_group(&client->dev.kobj, &gl518_group); 581 if (data->type == gl518sm_r80) 582 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 583 return err; 584 } 585 586 587 /* 588 * Called when we have found a new GL518SM. 589 * Note that we preserve D4:NoFan2 and D2:beep_enable. 590 */ 591 static void gl518_init_client(struct i2c_client *client) 592 { 593 /* Make sure we leave D7:Reset untouched */ 594 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 595 596 /* Comparator mode (D3=0), standby mode (D6=0) */ 597 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 598 599 /* Never interrupts */ 600 gl518_write_value(client, GL518_REG_MASK, 0x00); 601 602 /* Clear status register (D5=1), start (D6=1) */ 603 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 604 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 605 } 606 607 static int gl518_remove(struct i2c_client *client) 608 { 609 struct gl518_data *data = i2c_get_clientdata(client); 610 611 hwmon_device_unregister(data->hwmon_dev); 612 sysfs_remove_group(&client->dev.kobj, &gl518_group); 613 if (data->type == gl518sm_r80) 614 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 615 616 return 0; 617 } 618 619 /* 620 * Registers 0x07 to 0x0c are word-sized, others are byte-sized 621 * GL518 uses a high-byte first convention, which is exactly opposite to 622 * the SMBus standard. 623 */ 624 static int gl518_read_value(struct i2c_client *client, u8 reg) 625 { 626 if ((reg >= 0x07) && (reg <= 0x0c)) 627 return i2c_smbus_read_word_swapped(client, reg); 628 else 629 return i2c_smbus_read_byte_data(client, reg); 630 } 631 632 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 633 { 634 if ((reg >= 0x07) && (reg <= 0x0c)) 635 return i2c_smbus_write_word_swapped(client, reg, value); 636 else 637 return i2c_smbus_write_byte_data(client, reg, value); 638 } 639 640 static struct gl518_data *gl518_update_device(struct device *dev) 641 { 642 struct i2c_client *client = to_i2c_client(dev); 643 struct gl518_data *data = i2c_get_clientdata(client); 644 int val; 645 646 mutex_lock(&data->update_lock); 647 648 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 649 || !data->valid) { 650 dev_dbg(&client->dev, "Starting gl518 update\n"); 651 652 data->alarms = gl518_read_value(client, GL518_REG_INT); 653 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 654 655 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 656 data->voltage_min[0] = val & 0xff; 657 data->voltage_max[0] = (val >> 8) & 0xff; 658 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 659 data->voltage_min[1] = val & 0xff; 660 data->voltage_max[1] = (val >> 8) & 0xff; 661 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 662 data->voltage_min[2] = val & 0xff; 663 data->voltage_max[2] = (val >> 8) & 0xff; 664 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 665 data->voltage_min[3] = val & 0xff; 666 data->voltage_max[3] = (val >> 8) & 0xff; 667 668 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 669 data->fan_in[0] = (val >> 8) & 0xff; 670 data->fan_in[1] = val & 0xff; 671 672 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 673 data->fan_min[0] = (val >> 8) & 0xff; 674 data->fan_min[1] = val & 0xff; 675 676 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 677 data->temp_max = 678 gl518_read_value(client, GL518_REG_TEMP_MAX); 679 data->temp_hyst = 680 gl518_read_value(client, GL518_REG_TEMP_HYST); 681 682 val = gl518_read_value(client, GL518_REG_MISC); 683 data->fan_div[0] = (val >> 6) & 0x03; 684 data->fan_div[1] = (val >> 4) & 0x03; 685 data->fan_auto1 = (val >> 3) & 0x01; 686 687 data->alarms &= data->alarm_mask; 688 689 val = gl518_read_value(client, GL518_REG_CONF); 690 data->beep_enable = (val >> 2) & 1; 691 692 if (data->type != gl518sm_r00) { 693 data->voltage_in[0] = 694 gl518_read_value(client, GL518_REG_VDD); 695 data->voltage_in[1] = 696 gl518_read_value(client, GL518_REG_VIN1); 697 data->voltage_in[2] = 698 gl518_read_value(client, GL518_REG_VIN2); 699 } 700 data->voltage_in[3] = 701 gl518_read_value(client, GL518_REG_VIN3); 702 703 data->last_updated = jiffies; 704 data->valid = 1; 705 } 706 707 mutex_unlock(&data->update_lock); 708 709 return data; 710 } 711 712 module_i2c_driver(gl518_driver); 713 714 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 715 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 716 "Hong-Gunn Chew <hglinux@gunnet.org>"); 717 MODULE_DESCRIPTION("GL518SM driver"); 718 MODULE_LICENSE("GPL"); 719