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 /* Insmod parameters */ 50 I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80); 51 52 /* Many GL518 constants specified below */ 53 54 /* The GL518 registers */ 55 #define GL518_REG_CHIP_ID 0x00 56 #define GL518_REG_REVISION 0x01 57 #define GL518_REG_VENDOR_ID 0x02 58 #define GL518_REG_CONF 0x03 59 #define GL518_REG_TEMP_IN 0x04 60 #define GL518_REG_TEMP_MAX 0x05 61 #define GL518_REG_TEMP_HYST 0x06 62 #define GL518_REG_FAN_COUNT 0x07 63 #define GL518_REG_FAN_LIMIT 0x08 64 #define GL518_REG_VIN1_LIMIT 0x09 65 #define GL518_REG_VIN2_LIMIT 0x0a 66 #define GL518_REG_VIN3_LIMIT 0x0b 67 #define GL518_REG_VDD_LIMIT 0x0c 68 #define GL518_REG_VIN3 0x0d 69 #define GL518_REG_MISC 0x0f 70 #define GL518_REG_ALARM 0x10 71 #define GL518_REG_MASK 0x11 72 #define GL518_REG_INT 0x12 73 #define GL518_REG_VIN2 0x13 74 #define GL518_REG_VIN1 0x14 75 #define GL518_REG_VDD 0x15 76 77 78 /* 79 * Conversions. Rounding and limit checking is only done on the TO_REG 80 * variants. Note that you should be a bit careful with which arguments 81 * these macros are called: arguments may be evaluated more than once. 82 * Fixing this is just not worth it. 83 */ 84 85 #define RAW_FROM_REG(val) val 86 87 #define BOOL_FROM_REG(val) ((val)?0:1) 88 #define BOOL_TO_REG(val) ((val)?0:1) 89 90 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0? \ 91 (val)-500:(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, struct device_attribute *attr, char *buf) \ 174 { \ 175 struct gl518_data *data = gl518_update_device(dev); \ 176 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 177 } 178 179 show(TEMP, temp_input1, temp_in); 180 show(TEMP, temp_max1, temp_max); 181 show(TEMP, temp_hyst1, temp_hyst); 182 show(BOOL, fan_auto1, fan_auto1); 183 show(VDD, in_input0, voltage_in[0]); 184 show(IN, in_input1, voltage_in[1]); 185 show(IN, in_input2, voltage_in[2]); 186 show(IN, in_input3, voltage_in[3]); 187 show(VDD, in_min0, voltage_min[0]); 188 show(IN, in_min1, voltage_min[1]); 189 show(IN, in_min2, voltage_min[2]); 190 show(IN, in_min3, voltage_min[3]); 191 show(VDD, in_max0, voltage_max[0]); 192 show(IN, in_max1, voltage_max[1]); 193 show(IN, in_max2, voltage_max[2]); 194 show(IN, in_max3, voltage_max[3]); 195 show(RAW, alarms, alarms); 196 show(BOOL, beep_enable, beep_enable); 197 show(BEEP_MASK, beep_mask, beep_mask); 198 199 static ssize_t show_fan_input(struct device *dev, 200 struct device_attribute *attr, char *buf) 201 { 202 int nr = to_sensor_dev_attr(attr)->index; 203 struct gl518_data *data = gl518_update_device(dev); 204 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 205 DIV_FROM_REG(data->fan_div[nr]))); 206 } 207 208 static ssize_t show_fan_min(struct device *dev, 209 struct device_attribute *attr, char *buf) 210 { 211 int nr = to_sensor_dev_attr(attr)->index; 212 struct gl518_data *data = gl518_update_device(dev); 213 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], 214 DIV_FROM_REG(data->fan_div[nr]))); 215 } 216 217 static ssize_t show_fan_div(struct device *dev, 218 struct device_attribute *attr, char *buf) 219 { 220 int nr = to_sensor_dev_attr(attr)->index; 221 struct gl518_data *data = gl518_update_device(dev); 222 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); 223 } 224 225 #define set(type, suffix, value, reg) \ 226 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 227 size_t count) \ 228 { \ 229 struct i2c_client *client = to_i2c_client(dev); \ 230 struct gl518_data *data = i2c_get_clientdata(client); \ 231 long val = simple_strtol(buf, NULL, 10); \ 232 \ 233 mutex_lock(&data->update_lock); \ 234 data->value = type##_TO_REG(val); \ 235 gl518_write_value(client, reg, data->value); \ 236 mutex_unlock(&data->update_lock); \ 237 return count; \ 238 } 239 240 #define set_bits(type, suffix, value, reg, mask, shift) \ 241 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 242 size_t count) \ 243 { \ 244 struct i2c_client *client = to_i2c_client(dev); \ 245 struct gl518_data *data = i2c_get_clientdata(client); \ 246 int regvalue; \ 247 unsigned long val = simple_strtoul(buf, NULL, 10); \ 248 \ 249 mutex_lock(&data->update_lock); \ 250 regvalue = gl518_read_value(client, reg); \ 251 data->value = type##_TO_REG(val); \ 252 regvalue = (regvalue & ~mask) | (data->value << shift); \ 253 gl518_write_value(client, reg, regvalue); \ 254 mutex_unlock(&data->update_lock); \ 255 return count; \ 256 } 257 258 #define set_low(type, suffix, value, reg) \ 259 set_bits(type, suffix, value, reg, 0x00ff, 0) 260 #define set_high(type, suffix, value, reg) \ 261 set_bits(type, suffix, value, reg, 0xff00, 8) 262 263 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 264 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 265 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 266 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 267 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 268 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 269 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 270 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 271 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 272 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 273 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 274 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 275 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 276 277 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 278 const char *buf, size_t count) 279 { 280 struct i2c_client *client = to_i2c_client(dev); 281 struct gl518_data *data = i2c_get_clientdata(client); 282 int nr = to_sensor_dev_attr(attr)->index; 283 int regvalue; 284 unsigned long val = simple_strtoul(buf, NULL, 10); 285 286 mutex_lock(&data->update_lock); 287 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 288 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 289 regvalue = (regvalue & (0xff << (8 * nr))) 290 | (data->fan_min[nr] << (8 * (1 - nr))); 291 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 292 293 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 294 if (data->fan_min[nr] == 0) 295 data->alarm_mask &= ~(0x20 << nr); 296 else 297 data->alarm_mask |= (0x20 << nr); 298 data->beep_mask &= data->alarm_mask; 299 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 300 301 mutex_unlock(&data->update_lock); 302 return count; 303 } 304 305 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 306 const char *buf, size_t count) 307 { 308 struct i2c_client *client = to_i2c_client(dev); 309 struct gl518_data *data = i2c_get_clientdata(client); 310 int nr = to_sensor_dev_attr(attr)->index; 311 int regvalue; 312 unsigned long val = simple_strtoul(buf, NULL, 10); 313 314 switch (val) { 315 case 1: val = 0; break; 316 case 2: val = 1; break; 317 case 4: val = 2; break; 318 case 8: val = 3; break; 319 default: 320 dev_err(dev, "Invalid fan clock divider %lu, choose one " 321 "of 1, 2, 4 or 8\n", val); 322 return -EINVAL; 323 } 324 325 mutex_lock(&data->update_lock); 326 regvalue = gl518_read_value(client, GL518_REG_MISC); 327 data->fan_div[nr] = val; 328 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 329 | (data->fan_div[nr] << (6 - 2 * nr)); 330 gl518_write_value(client, GL518_REG_MISC, regvalue); 331 mutex_unlock(&data->update_lock); 332 return count; 333 } 334 335 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 336 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 337 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 338 show_temp_hyst1, set_temp_hyst1); 339 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 340 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 341 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 342 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 343 show_fan_min, set_fan_min, 0); 344 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 345 show_fan_min, set_fan_min, 1); 346 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 347 show_fan_div, set_fan_div, 0); 348 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 349 show_fan_div, set_fan_div, 1); 350 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 351 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 352 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 353 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 354 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 355 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 356 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 357 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 358 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 359 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 360 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 361 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 362 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 363 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 364 show_beep_enable, set_beep_enable); 365 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 366 show_beep_mask, set_beep_mask); 367 368 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 369 char *buf) 370 { 371 int bitnr = to_sensor_dev_attr(attr)->index; 372 struct gl518_data *data = gl518_update_device(dev); 373 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 374 } 375 376 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 377 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 378 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 379 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 380 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 381 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 382 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 383 384 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 385 char *buf) 386 { 387 int bitnr = to_sensor_dev_attr(attr)->index; 388 struct gl518_data *data = gl518_update_device(dev); 389 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 390 } 391 392 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 393 const char *buf, size_t count) 394 { 395 struct i2c_client *client = to_i2c_client(dev); 396 struct gl518_data *data = i2c_get_clientdata(client); 397 int bitnr = to_sensor_dev_attr(attr)->index; 398 unsigned long bit; 399 400 bit = simple_strtoul(buf, NULL, 10); 401 if (bit & ~1) 402 return -EINVAL; 403 404 mutex_lock(&data->update_lock); 405 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 406 if (bit) 407 data->beep_mask |= (1 << bitnr); 408 else 409 data->beep_mask &= ~(1 << bitnr); 410 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 411 mutex_unlock(&data->update_lock); 412 return count; 413 } 414 415 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 416 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 417 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 418 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 419 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 420 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 421 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 422 423 static struct attribute *gl518_attributes[] = { 424 &dev_attr_in3_input.attr, 425 &dev_attr_in0_min.attr, 426 &dev_attr_in1_min.attr, 427 &dev_attr_in2_min.attr, 428 &dev_attr_in3_min.attr, 429 &dev_attr_in0_max.attr, 430 &dev_attr_in1_max.attr, 431 &dev_attr_in2_max.attr, 432 &dev_attr_in3_max.attr, 433 &sensor_dev_attr_in0_alarm.dev_attr.attr, 434 &sensor_dev_attr_in1_alarm.dev_attr.attr, 435 &sensor_dev_attr_in2_alarm.dev_attr.attr, 436 &sensor_dev_attr_in3_alarm.dev_attr.attr, 437 &sensor_dev_attr_in0_beep.dev_attr.attr, 438 &sensor_dev_attr_in1_beep.dev_attr.attr, 439 &sensor_dev_attr_in2_beep.dev_attr.attr, 440 &sensor_dev_attr_in3_beep.dev_attr.attr, 441 442 &dev_attr_fan1_auto.attr, 443 &sensor_dev_attr_fan1_input.dev_attr.attr, 444 &sensor_dev_attr_fan2_input.dev_attr.attr, 445 &sensor_dev_attr_fan1_min.dev_attr.attr, 446 &sensor_dev_attr_fan2_min.dev_attr.attr, 447 &sensor_dev_attr_fan1_div.dev_attr.attr, 448 &sensor_dev_attr_fan2_div.dev_attr.attr, 449 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 450 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 451 &sensor_dev_attr_fan1_beep.dev_attr.attr, 452 &sensor_dev_attr_fan2_beep.dev_attr.attr, 453 454 &dev_attr_temp1_input.attr, 455 &dev_attr_temp1_max.attr, 456 &dev_attr_temp1_max_hyst.attr, 457 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 458 &sensor_dev_attr_temp1_beep.dev_attr.attr, 459 460 &dev_attr_alarms.attr, 461 &dev_attr_beep_enable.attr, 462 &dev_attr_beep_mask.attr, 463 NULL 464 }; 465 466 static const struct attribute_group gl518_group = { 467 .attrs = gl518_attributes, 468 }; 469 470 static struct attribute *gl518_attributes_r80[] = { 471 &dev_attr_in0_input.attr, 472 &dev_attr_in1_input.attr, 473 &dev_attr_in2_input.attr, 474 NULL 475 }; 476 477 static const struct attribute_group gl518_group_r80 = { 478 .attrs = gl518_attributes_r80, 479 }; 480 481 /* 482 * Real code 483 */ 484 485 /* Return 0 if detection is successful, -ENODEV otherwise */ 486 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) 487 { 488 struct i2c_adapter *adapter = client->adapter; 489 int rev; 490 491 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 492 I2C_FUNC_SMBUS_WORD_DATA)) 493 return -ENODEV; 494 495 /* Now, we do the remaining detection. */ 496 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 497 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 498 return -ENODEV; 499 500 /* Determine the chip type. */ 501 rev = gl518_read_value(client, GL518_REG_REVISION); 502 if (rev != 0x00 && rev != 0x80) 503 return -ENODEV; 504 505 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 506 507 return 0; 508 } 509 510 static int gl518_probe(struct i2c_client *client, 511 const struct i2c_device_id *id) 512 { 513 struct gl518_data *data; 514 int err, revision; 515 516 data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL); 517 if (!data) { 518 err = -ENOMEM; 519 goto exit; 520 } 521 522 i2c_set_clientdata(client, data); 523 revision = gl518_read_value(client, GL518_REG_REVISION); 524 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 525 mutex_init(&data->update_lock); 526 527 /* Initialize the GL518SM chip */ 528 data->alarm_mask = 0xff; 529 gl518_init_client(client); 530 531 /* Register sysfs hooks */ 532 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group))) 533 goto exit_free; 534 if (data->type == gl518sm_r80) 535 if ((err = sysfs_create_group(&client->dev.kobj, 536 &gl518_group_r80))) 537 goto exit_remove_files; 538 539 data->hwmon_dev = hwmon_device_register(&client->dev); 540 if (IS_ERR(data->hwmon_dev)) { 541 err = PTR_ERR(data->hwmon_dev); 542 goto exit_remove_files; 543 } 544 545 return 0; 546 547 exit_remove_files: 548 sysfs_remove_group(&client->dev.kobj, &gl518_group); 549 if (data->type == gl518sm_r80) 550 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 551 exit_free: 552 kfree(data); 553 exit: 554 return err; 555 } 556 557 558 /* Called when we have found a new GL518SM. 559 Note that we preserve D4:NoFan2 and D2:beep_enable. */ 560 static void gl518_init_client(struct i2c_client *client) 561 { 562 /* Make sure we leave D7:Reset untouched */ 563 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 564 565 /* Comparator mode (D3=0), standby mode (D6=0) */ 566 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 567 568 /* Never interrupts */ 569 gl518_write_value(client, GL518_REG_MASK, 0x00); 570 571 /* Clear status register (D5=1), start (D6=1) */ 572 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 573 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 574 } 575 576 static int gl518_remove(struct i2c_client *client) 577 { 578 struct gl518_data *data = i2c_get_clientdata(client); 579 580 hwmon_device_unregister(data->hwmon_dev); 581 sysfs_remove_group(&client->dev.kobj, &gl518_group); 582 if (data->type == gl518sm_r80) 583 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 584 585 kfree(data); 586 return 0; 587 } 588 589 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 590 GL518 uses a high-byte first convention, which is exactly opposite to 591 the SMBus standard. */ 592 static int gl518_read_value(struct i2c_client *client, u8 reg) 593 { 594 if ((reg >= 0x07) && (reg <= 0x0c)) 595 return swab16(i2c_smbus_read_word_data(client, reg)); 596 else 597 return i2c_smbus_read_byte_data(client, reg); 598 } 599 600 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 601 { 602 if ((reg >= 0x07) && (reg <= 0x0c)) 603 return i2c_smbus_write_word_data(client, reg, swab16(value)); 604 else 605 return i2c_smbus_write_byte_data(client, reg, value); 606 } 607 608 static struct gl518_data *gl518_update_device(struct device *dev) 609 { 610 struct i2c_client *client = to_i2c_client(dev); 611 struct gl518_data *data = i2c_get_clientdata(client); 612 int val; 613 614 mutex_lock(&data->update_lock); 615 616 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 617 || !data->valid) { 618 dev_dbg(&client->dev, "Starting gl518 update\n"); 619 620 data->alarms = gl518_read_value(client, GL518_REG_INT); 621 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 622 623 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 624 data->voltage_min[0] = val & 0xff; 625 data->voltage_max[0] = (val >> 8) & 0xff; 626 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 627 data->voltage_min[1] = val & 0xff; 628 data->voltage_max[1] = (val >> 8) & 0xff; 629 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 630 data->voltage_min[2] = val & 0xff; 631 data->voltage_max[2] = (val >> 8) & 0xff; 632 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 633 data->voltage_min[3] = val & 0xff; 634 data->voltage_max[3] = (val >> 8) & 0xff; 635 636 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 637 data->fan_in[0] = (val >> 8) & 0xff; 638 data->fan_in[1] = val & 0xff; 639 640 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 641 data->fan_min[0] = (val >> 8) & 0xff; 642 data->fan_min[1] = val & 0xff; 643 644 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 645 data->temp_max = 646 gl518_read_value(client, GL518_REG_TEMP_MAX); 647 data->temp_hyst = 648 gl518_read_value(client, GL518_REG_TEMP_HYST); 649 650 val = gl518_read_value(client, GL518_REG_MISC); 651 data->fan_div[0] = (val >> 6) & 0x03; 652 data->fan_div[1] = (val >> 4) & 0x03; 653 data->fan_auto1 = (val >> 3) & 0x01; 654 655 data->alarms &= data->alarm_mask; 656 657 val = gl518_read_value(client, GL518_REG_CONF); 658 data->beep_enable = (val >> 2) & 1; 659 660 if (data->type != gl518sm_r00) { 661 data->voltage_in[0] = 662 gl518_read_value(client, GL518_REG_VDD); 663 data->voltage_in[1] = 664 gl518_read_value(client, GL518_REG_VIN1); 665 data->voltage_in[2] = 666 gl518_read_value(client, GL518_REG_VIN2); 667 } 668 data->voltage_in[3] = 669 gl518_read_value(client, GL518_REG_VIN3); 670 671 data->last_updated = jiffies; 672 data->valid = 1; 673 } 674 675 mutex_unlock(&data->update_lock); 676 677 return data; 678 } 679 680 static int __init sensors_gl518sm_init(void) 681 { 682 return i2c_add_driver(&gl518_driver); 683 } 684 685 static void __exit sensors_gl518sm_exit(void) 686 { 687 i2c_del_driver(&gl518_driver); 688 } 689 690 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 691 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 692 "Hong-Gunn Chew <hglinux@gunnet.org>"); 693 MODULE_DESCRIPTION("GL518SM driver"); 694 MODULE_LICENSE("GPL"); 695 696 module_init(sensors_gl518sm_init); 697 module_exit(sensors_gl518sm_exit); 698