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:(val)+500)/1000)+119),0,255)) 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 = SENSORS_LIMIT(rpm, 1, 960000) * div; 99 return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255); 100 } 101 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val)*(div)))) 102 103 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) 104 #define IN_FROM_REG(val) ((val)*19) 105 106 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) 107 #define VDD_FROM_REG(val) (((val)*95+2)/4) 108 109 #define DIV_FROM_REG(val) (1 << (val)) 110 111 #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) 112 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) 113 114 /* Each client has this additional data */ 115 struct gl518_data { 116 struct device *hwmon_dev; 117 enum chips type; 118 119 struct mutex update_lock; 120 char valid; /* !=0 if following fields are valid */ 121 unsigned long last_updated; /* In jiffies */ 122 123 u8 voltage_in[4]; /* Register values; [0] = VDD */ 124 u8 voltage_min[4]; /* Register values; [0] = VDD */ 125 u8 voltage_max[4]; /* Register values; [0] = VDD */ 126 u8 fan_in[2]; 127 u8 fan_min[2]; 128 u8 fan_div[2]; /* Register encoding, shifted right */ 129 u8 fan_auto1; /* Boolean */ 130 u8 temp_in; /* Register values */ 131 u8 temp_max; /* Register values */ 132 u8 temp_hyst; /* Register values */ 133 u8 alarms; /* Register value */ 134 u8 alarm_mask; 135 u8 beep_mask; /* Register value */ 136 u8 beep_enable; /* Boolean */ 137 }; 138 139 static int gl518_probe(struct i2c_client *client, 140 const struct i2c_device_id *id); 141 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info); 142 static void gl518_init_client(struct i2c_client *client); 143 static int gl518_remove(struct i2c_client *client); 144 static int gl518_read_value(struct i2c_client *client, u8 reg); 145 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value); 146 static struct gl518_data *gl518_update_device(struct device *dev); 147 148 static const struct i2c_device_id gl518_id[] = { 149 { "gl518sm", 0 }, 150 { } 151 }; 152 MODULE_DEVICE_TABLE(i2c, gl518_id); 153 154 /* This is the driver that will be inserted */ 155 static struct i2c_driver gl518_driver = { 156 .class = I2C_CLASS_HWMON, 157 .driver = { 158 .name = "gl518sm", 159 }, 160 .probe = gl518_probe, 161 .remove = gl518_remove, 162 .id_table = gl518_id, 163 .detect = gl518_detect, 164 .address_list = normal_i2c, 165 }; 166 167 /* 168 * Sysfs stuff 169 */ 170 171 #define show(type, suffix, value) \ 172 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ 173 { \ 174 struct gl518_data *data = gl518_update_device(dev); \ 175 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 176 } 177 178 show(TEMP, temp_input1, temp_in); 179 show(TEMP, temp_max1, temp_max); 180 show(TEMP, temp_hyst1, temp_hyst); 181 show(BOOL, fan_auto1, fan_auto1); 182 show(VDD, in_input0, voltage_in[0]); 183 show(IN, in_input1, voltage_in[1]); 184 show(IN, in_input2, voltage_in[2]); 185 show(IN, in_input3, voltage_in[3]); 186 show(VDD, in_min0, voltage_min[0]); 187 show(IN, in_min1, voltage_min[1]); 188 show(IN, in_min2, voltage_min[2]); 189 show(IN, in_min3, voltage_min[3]); 190 show(VDD, in_max0, voltage_max[0]); 191 show(IN, in_max1, voltage_max[1]); 192 show(IN, in_max2, voltage_max[2]); 193 show(IN, in_max3, voltage_max[3]); 194 show(RAW, alarms, alarms); 195 show(BOOL, beep_enable, beep_enable); 196 show(BEEP_MASK, beep_mask, beep_mask); 197 198 static ssize_t show_fan_input(struct device *dev, 199 struct device_attribute *attr, char *buf) 200 { 201 int nr = to_sensor_dev_attr(attr)->index; 202 struct gl518_data *data = gl518_update_device(dev); 203 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 204 DIV_FROM_REG(data->fan_div[nr]))); 205 } 206 207 static ssize_t show_fan_min(struct device *dev, 208 struct device_attribute *attr, char *buf) 209 { 210 int nr = to_sensor_dev_attr(attr)->index; 211 struct gl518_data *data = gl518_update_device(dev); 212 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 213 DIV_FROM_REG(data->fan_div[nr]))); 214 } 215 216 static ssize_t show_fan_div(struct device *dev, 217 struct device_attribute *attr, char *buf) 218 { 219 int nr = to_sensor_dev_attr(attr)->index; 220 struct gl518_data *data = gl518_update_device(dev); 221 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 222 } 223 224 #define set(type, suffix, value, reg) \ 225 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 226 size_t count) \ 227 { \ 228 struct i2c_client *client = to_i2c_client(dev); \ 229 struct gl518_data *data = i2c_get_clientdata(client); \ 230 long val = simple_strtol(buf, NULL, 10); \ 231 \ 232 mutex_lock(&data->update_lock); \ 233 data->value = type##_TO_REG(val); \ 234 gl518_write_value(client, reg, data->value); \ 235 mutex_unlock(&data->update_lock); \ 236 return count; \ 237 } 238 239 #define set_bits(type, suffix, value, reg, mask, shift) \ 240 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 241 size_t count) \ 242 { \ 243 struct i2c_client *client = to_i2c_client(dev); \ 244 struct gl518_data *data = i2c_get_clientdata(client); \ 245 int regvalue; \ 246 unsigned long val = simple_strtoul(buf, NULL, 10); \ 247 \ 248 mutex_lock(&data->update_lock); \ 249 regvalue = gl518_read_value(client, reg); \ 250 data->value = type##_TO_REG(val); \ 251 regvalue = (regvalue & ~mask) | (data->value << shift); \ 252 gl518_write_value(client, reg, regvalue); \ 253 mutex_unlock(&data->update_lock); \ 254 return count; \ 255 } 256 257 #define set_low(type, suffix, value, reg) \ 258 set_bits(type, suffix, value, reg, 0x00ff, 0) 259 #define set_high(type, suffix, value, reg) \ 260 set_bits(type, suffix, value, reg, 0xff00, 8) 261 262 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 263 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 264 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 265 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 266 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 267 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 268 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 269 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 270 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 271 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 272 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 273 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 274 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 275 276 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 277 const char *buf, size_t count) 278 { 279 struct i2c_client *client = to_i2c_client(dev); 280 struct gl518_data *data = i2c_get_clientdata(client); 281 int nr = to_sensor_dev_attr(attr)->index; 282 int regvalue; 283 unsigned long val = simple_strtoul(buf, NULL, 10); 284 285 mutex_lock(&data->update_lock); 286 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 287 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 288 regvalue = (regvalue & (0xff << (8 * nr))) 289 | (data->fan_min[nr] << (8 * (1 - nr))); 290 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 291 292 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 293 if (data->fan_min[nr] == 0) 294 data->alarm_mask &= ~(0x20 << nr); 295 else 296 data->alarm_mask |= (0x20 << nr); 297 data->beep_mask &= data->alarm_mask; 298 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 299 300 mutex_unlock(&data->update_lock); 301 return count; 302 } 303 304 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 305 const char *buf, size_t count) 306 { 307 struct i2c_client *client = to_i2c_client(dev); 308 struct gl518_data *data = i2c_get_clientdata(client); 309 int nr = to_sensor_dev_attr(attr)->index; 310 int regvalue; 311 unsigned long val = simple_strtoul(buf, NULL, 10); 312 313 switch (val) { 314 case 1: val = 0; break; 315 case 2: val = 1; break; 316 case 4: val = 2; break; 317 case 8: val = 3; break; 318 default: 319 dev_err(dev, "Invalid fan clock divider %lu, choose one " 320 "of 1, 2, 4 or 8\n", val); 321 return -EINVAL; 322 } 323 324 mutex_lock(&data->update_lock); 325 regvalue = gl518_read_value(client, GL518_REG_MISC); 326 data->fan_div[nr] = val; 327 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 328 | (data->fan_div[nr] << (6 - 2 * nr)); 329 gl518_write_value(client, GL518_REG_MISC, regvalue); 330 mutex_unlock(&data->update_lock); 331 return count; 332 } 333 334 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 335 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 336 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 337 show_temp_hyst1, set_temp_hyst1); 338 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 339 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 340 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 341 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 342 show_fan_min, set_fan_min, 0); 343 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 344 show_fan_min, set_fan_min, 1); 345 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 346 show_fan_div, set_fan_div, 0); 347 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 348 show_fan_div, set_fan_div, 1); 349 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 350 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 351 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 352 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 353 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 354 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 355 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 356 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 357 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 358 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 359 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 360 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 361 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 362 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 363 show_beep_enable, set_beep_enable); 364 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 365 show_beep_mask, set_beep_mask); 366 367 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 368 char *buf) 369 { 370 int bitnr = to_sensor_dev_attr(attr)->index; 371 struct gl518_data *data = gl518_update_device(dev); 372 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 373 } 374 375 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 376 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 377 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 378 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 379 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 380 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 381 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 382 383 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 384 char *buf) 385 { 386 int bitnr = to_sensor_dev_attr(attr)->index; 387 struct gl518_data *data = gl518_update_device(dev); 388 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 389 } 390 391 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 392 const char *buf, size_t count) 393 { 394 struct i2c_client *client = to_i2c_client(dev); 395 struct gl518_data *data = i2c_get_clientdata(client); 396 int bitnr = to_sensor_dev_attr(attr)->index; 397 unsigned long bit; 398 399 bit = simple_strtoul(buf, NULL, 10); 400 if (bit & ~1) 401 return -EINVAL; 402 403 mutex_lock(&data->update_lock); 404 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 405 if (bit) 406 data->beep_mask |= (1 << bitnr); 407 else 408 data->beep_mask &= ~(1 << bitnr); 409 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 410 mutex_unlock(&data->update_lock); 411 return count; 412 } 413 414 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 415 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 416 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 417 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 418 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 419 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 420 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 421 422 static struct attribute *gl518_attributes[] = { 423 &dev_attr_in3_input.attr, 424 &dev_attr_in0_min.attr, 425 &dev_attr_in1_min.attr, 426 &dev_attr_in2_min.attr, 427 &dev_attr_in3_min.attr, 428 &dev_attr_in0_max.attr, 429 &dev_attr_in1_max.attr, 430 &dev_attr_in2_max.attr, 431 &dev_attr_in3_max.attr, 432 &sensor_dev_attr_in0_alarm.dev_attr.attr, 433 &sensor_dev_attr_in1_alarm.dev_attr.attr, 434 &sensor_dev_attr_in2_alarm.dev_attr.attr, 435 &sensor_dev_attr_in3_alarm.dev_attr.attr, 436 &sensor_dev_attr_in0_beep.dev_attr.attr, 437 &sensor_dev_attr_in1_beep.dev_attr.attr, 438 &sensor_dev_attr_in2_beep.dev_attr.attr, 439 &sensor_dev_attr_in3_beep.dev_attr.attr, 440 441 &dev_attr_fan1_auto.attr, 442 &sensor_dev_attr_fan1_input.dev_attr.attr, 443 &sensor_dev_attr_fan2_input.dev_attr.attr, 444 &sensor_dev_attr_fan1_min.dev_attr.attr, 445 &sensor_dev_attr_fan2_min.dev_attr.attr, 446 &sensor_dev_attr_fan1_div.dev_attr.attr, 447 &sensor_dev_attr_fan2_div.dev_attr.attr, 448 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 449 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 450 &sensor_dev_attr_fan1_beep.dev_attr.attr, 451 &sensor_dev_attr_fan2_beep.dev_attr.attr, 452 453 &dev_attr_temp1_input.attr, 454 &dev_attr_temp1_max.attr, 455 &dev_attr_temp1_max_hyst.attr, 456 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 457 &sensor_dev_attr_temp1_beep.dev_attr.attr, 458 459 &dev_attr_alarms.attr, 460 &dev_attr_beep_enable.attr, 461 &dev_attr_beep_mask.attr, 462 NULL 463 }; 464 465 static const struct attribute_group gl518_group = { 466 .attrs = gl518_attributes, 467 }; 468 469 static struct attribute *gl518_attributes_r80[] = { 470 &dev_attr_in0_input.attr, 471 &dev_attr_in1_input.attr, 472 &dev_attr_in2_input.attr, 473 NULL 474 }; 475 476 static const struct attribute_group gl518_group_r80 = { 477 .attrs = gl518_attributes_r80, 478 }; 479 480 /* 481 * Real code 482 */ 483 484 /* Return 0 if detection is successful, -ENODEV otherwise */ 485 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 486 { 487 struct i2c_adapter *adapter = client->adapter; 488 int rev; 489 490 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 491 I2C_FUNC_SMBUS_WORD_DATA)) 492 return -ENODEV; 493 494 /* Now, we do the remaining detection. */ 495 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 496 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 497 return -ENODEV; 498 499 /* Determine the chip type. */ 500 rev = gl518_read_value(client, GL518_REG_REVISION); 501 if (rev != 0x00 && rev != 0x80) 502 return -ENODEV; 503 504 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 505 506 return 0; 507 } 508 509 static int gl518_probe(struct i2c_client *client, 510 const struct i2c_device_id *id) 511 { 512 struct gl518_data *data; 513 int err, revision; 514 515 data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL); 516 if (!data) { 517 err = -ENOMEM; 518 goto exit; 519 } 520 521 i2c_set_clientdata(client, data); 522 revision = gl518_read_value(client, GL518_REG_REVISION); 523 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 524 mutex_init(&data->update_lock); 525 526 /* Initialize the GL518SM chip */ 527 data->alarm_mask = 0xff; 528 gl518_init_client(client); 529 530 /* Register sysfs hooks */ 531 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group))) 532 goto exit_free; 533 if (data->type == gl518sm_r80) 534 if ((err = sysfs_create_group(&client->dev.kobj, 535 &gl518_group_r80))) 536 goto exit_remove_files; 537 538 data->hwmon_dev = hwmon_device_register(&client->dev); 539 if (IS_ERR(data->hwmon_dev)) { 540 err = PTR_ERR(data->hwmon_dev); 541 goto exit_remove_files; 542 } 543 544 return 0; 545 546 exit_remove_files: 547 sysfs_remove_group(&client->dev.kobj, &gl518_group); 548 if (data->type == gl518sm_r80) 549 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 550 exit_free: 551 kfree(data); 552 exit: 553 return err; 554 } 555 556 557 /* Called when we have found a new GL518SM. 558 Note that we preserve D4:NoFan2 and D2:beep_enable. */ 559 static void gl518_init_client(struct i2c_client *client) 560 { 561 /* Make sure we leave D7:Reset untouched */ 562 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 563 564 /* Comparator mode (D3=0), standby mode (D6=0) */ 565 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 566 567 /* Never interrupts */ 568 gl518_write_value(client, GL518_REG_MASK, 0x00); 569 570 /* Clear status register (D5=1), start (D6=1) */ 571 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 572 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 573 } 574 575 static int gl518_remove(struct i2c_client *client) 576 { 577 struct gl518_data *data = i2c_get_clientdata(client); 578 579 hwmon_device_unregister(data->hwmon_dev); 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); 583 584 kfree(data); 585 return 0; 586 } 587 588 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 589 GL518 uses a high-byte first convention, which is exactly opposite to 590 the SMBus standard. */ 591 static int gl518_read_value(struct i2c_client *client, u8 reg) 592 { 593 if ((reg >= 0x07) && (reg <= 0x0c)) 594 return i2c_smbus_read_word_swapped(client, reg); 595 else 596 return i2c_smbus_read_byte_data(client, reg); 597 } 598 599 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 600 { 601 if ((reg >= 0x07) && (reg <= 0x0c)) 602 return i2c_smbus_write_word_swapped(client, reg, value); 603 else 604 return i2c_smbus_write_byte_data(client, reg, value); 605 } 606 607 static struct gl518_data *gl518_update_device(struct device *dev) 608 { 609 struct i2c_client *client = to_i2c_client(dev); 610 struct gl518_data *data = i2c_get_clientdata(client); 611 int val; 612 613 mutex_lock(&data->update_lock); 614 615 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 616 || !data->valid) { 617 dev_dbg(&client->dev, "Starting gl518 update\n"); 618 619 data->alarms = gl518_read_value(client, GL518_REG_INT); 620 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 621 622 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 623 data->voltage_min[0] = val & 0xff; 624 data->voltage_max[0] = (val >> 8) & 0xff; 625 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 626 data->voltage_min[1] = val & 0xff; 627 data->voltage_max[1] = (val >> 8) & 0xff; 628 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 629 data->voltage_min[2] = val & 0xff; 630 data->voltage_max[2] = (val >> 8) & 0xff; 631 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 632 data->voltage_min[3] = val & 0xff; 633 data->voltage_max[3] = (val >> 8) & 0xff; 634 635 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 636 data->fan_in[0] = (val >> 8) & 0xff; 637 data->fan_in[1] = val & 0xff; 638 639 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 640 data->fan_min[0] = (val >> 8) & 0xff; 641 data->fan_min[1] = val & 0xff; 642 643 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 644 data->temp_max = 645 gl518_read_value(client, GL518_REG_TEMP_MAX); 646 data->temp_hyst = 647 gl518_read_value(client, GL518_REG_TEMP_HYST); 648 649 val = gl518_read_value(client, GL518_REG_MISC); 650 data->fan_div[0] = (val >> 6) & 0x03; 651 data->fan_div[1] = (val >> 4) & 0x03; 652 data->fan_auto1 = (val >> 3) & 0x01; 653 654 data->alarms &= data->alarm_mask; 655 656 val = gl518_read_value(client, GL518_REG_CONF); 657 data->beep_enable = (val >> 2) & 1; 658 659 if (data->type != gl518sm_r00) { 660 data->voltage_in[0] = 661 gl518_read_value(client, GL518_REG_VDD); 662 data->voltage_in[1] = 663 gl518_read_value(client, GL518_REG_VIN1); 664 data->voltage_in[2] = 665 gl518_read_value(client, GL518_REG_VIN2); 666 } 667 data->voltage_in[3] = 668 gl518_read_value(client, GL518_REG_VIN3); 669 670 data->last_updated = jiffies; 671 data->valid = 1; 672 } 673 674 mutex_unlock(&data->update_lock); 675 676 return data; 677 } 678 679 static int __init sensors_gl518sm_init(void) 680 { 681 return i2c_add_driver(&gl518_driver); 682 } 683 684 static void __exit sensors_gl518sm_exit(void) 685 { 686 i2c_del_driver(&gl518_driver); 687 } 688 689 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 690 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 691 "Hong-Gunn Chew <hglinux@gunnet.org>"); 692 MODULE_DESCRIPTION("GL518SM driver"); 693 MODULE_LICENSE("GPL"); 694 695 module_init(sensors_gl518sm_init); 696 module_exit(sensors_gl518sm_exit); 697