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, int kind, 143 struct i2c_board_info *info); 144 static void gl518_init_client(struct i2c_client *client); 145 static int gl518_remove(struct i2c_client *client); 146 static int gl518_read_value(struct i2c_client *client, u8 reg); 147 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value); 148 static struct gl518_data *gl518_update_device(struct device *dev); 149 150 static const struct i2c_device_id gl518_id[] = { 151 { "gl518sm", 0 }, 152 { } 153 }; 154 MODULE_DEVICE_TABLE(i2c, gl518_id); 155 156 /* This is the driver that will be inserted */ 157 static struct i2c_driver gl518_driver = { 158 .class = I2C_CLASS_HWMON, 159 .driver = { 160 .name = "gl518sm", 161 }, 162 .probe = gl518_probe, 163 .remove = gl518_remove, 164 .id_table = gl518_id, 165 .detect = gl518_detect, 166 .address_data = &addr_data, 167 }; 168 169 /* 170 * Sysfs stuff 171 */ 172 173 #define show(type, suffix, value) \ 174 static ssize_t show_##suffix(struct device *dev, 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, struct device_attribute *attr, const char *buf, \ 228 size_t count) \ 229 { \ 230 struct i2c_client *client = to_i2c_client(dev); \ 231 struct gl518_data *data = i2c_get_clientdata(client); \ 232 long val = simple_strtol(buf, NULL, 10); \ 233 \ 234 mutex_lock(&data->update_lock); \ 235 data->value = type##_TO_REG(val); \ 236 gl518_write_value(client, reg, data->value); \ 237 mutex_unlock(&data->update_lock); \ 238 return count; \ 239 } 240 241 #define set_bits(type, suffix, value, reg, mask, shift) \ 242 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 243 size_t count) \ 244 { \ 245 struct i2c_client *client = to_i2c_client(dev); \ 246 struct gl518_data *data = i2c_get_clientdata(client); \ 247 int regvalue; \ 248 unsigned long val = simple_strtoul(buf, NULL, 10); \ 249 \ 250 mutex_lock(&data->update_lock); \ 251 regvalue = gl518_read_value(client, reg); \ 252 data->value = type##_TO_REG(val); \ 253 regvalue = (regvalue & ~mask) | (data->value << shift); \ 254 gl518_write_value(client, reg, regvalue); \ 255 mutex_unlock(&data->update_lock); \ 256 return count; \ 257 } 258 259 #define set_low(type, suffix, value, reg) \ 260 set_bits(type, suffix, value, reg, 0x00ff, 0) 261 #define set_high(type, suffix, value, reg) \ 262 set_bits(type, suffix, value, reg, 0xff00, 8) 263 264 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 265 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 266 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 267 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 268 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 269 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 270 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 271 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 272 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 273 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 274 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 275 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 276 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 277 278 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 279 const char *buf, size_t count) 280 { 281 struct i2c_client *client = to_i2c_client(dev); 282 struct gl518_data *data = i2c_get_clientdata(client); 283 int nr = to_sensor_dev_attr(attr)->index; 284 int regvalue; 285 unsigned long val = simple_strtoul(buf, NULL, 10); 286 287 mutex_lock(&data->update_lock); 288 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 289 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 290 regvalue = (regvalue & (0xff << (8 * nr))) 291 | (data->fan_min[nr] << (8 * (1 - nr))); 292 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 293 294 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 295 if (data->fan_min[nr] == 0) 296 data->alarm_mask &= ~(0x20 << nr); 297 else 298 data->alarm_mask |= (0x20 << nr); 299 data->beep_mask &= data->alarm_mask; 300 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 301 302 mutex_unlock(&data->update_lock); 303 return count; 304 } 305 306 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 307 const char *buf, size_t count) 308 { 309 struct i2c_client *client = to_i2c_client(dev); 310 struct gl518_data *data = i2c_get_clientdata(client); 311 int nr = to_sensor_dev_attr(attr)->index; 312 int regvalue; 313 unsigned long val = simple_strtoul(buf, NULL, 10); 314 315 switch (val) { 316 case 1: val = 0; break; 317 case 2: val = 1; break; 318 case 4: val = 2; break; 319 case 8: val = 3; break; 320 default: 321 dev_err(dev, "Invalid fan clock divider %lu, choose one " 322 "of 1, 2, 4 or 8\n", val); 323 return -EINVAL; 324 } 325 326 mutex_lock(&data->update_lock); 327 regvalue = gl518_read_value(client, GL518_REG_MISC); 328 data->fan_div[nr] = val; 329 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 330 | (data->fan_div[nr] << (6 - 2 * nr)); 331 gl518_write_value(client, GL518_REG_MISC, regvalue); 332 mutex_unlock(&data->update_lock); 333 return count; 334 } 335 336 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 337 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 338 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 339 show_temp_hyst1, set_temp_hyst1); 340 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 341 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 342 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 343 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 344 show_fan_min, set_fan_min, 0); 345 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 346 show_fan_min, set_fan_min, 1); 347 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 348 show_fan_div, set_fan_div, 0); 349 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 350 show_fan_div, set_fan_div, 1); 351 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 352 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 353 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 354 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 355 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 356 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 357 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 358 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 359 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 360 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 361 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 362 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 363 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 364 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 365 show_beep_enable, set_beep_enable); 366 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 367 show_beep_mask, set_beep_mask); 368 369 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 370 char *buf) 371 { 372 int bitnr = to_sensor_dev_attr(attr)->index; 373 struct gl518_data *data = gl518_update_device(dev); 374 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 375 } 376 377 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 378 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 379 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 380 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 381 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 382 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 383 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 384 385 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 386 char *buf) 387 { 388 int bitnr = to_sensor_dev_attr(attr)->index; 389 struct gl518_data *data = gl518_update_device(dev); 390 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 391 } 392 393 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 394 const char *buf, size_t count) 395 { 396 struct i2c_client *client = to_i2c_client(dev); 397 struct gl518_data *data = i2c_get_clientdata(client); 398 int bitnr = to_sensor_dev_attr(attr)->index; 399 unsigned long bit; 400 401 bit = simple_strtoul(buf, NULL, 10); 402 if (bit & ~1) 403 return -EINVAL; 404 405 mutex_lock(&data->update_lock); 406 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 407 if (bit) 408 data->beep_mask |= (1 << bitnr); 409 else 410 data->beep_mask &= ~(1 << bitnr); 411 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 412 mutex_unlock(&data->update_lock); 413 return count; 414 } 415 416 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 417 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 418 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 419 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 420 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 421 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 422 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 423 424 static struct attribute *gl518_attributes[] = { 425 &dev_attr_in3_input.attr, 426 &dev_attr_in0_min.attr, 427 &dev_attr_in1_min.attr, 428 &dev_attr_in2_min.attr, 429 &dev_attr_in3_min.attr, 430 &dev_attr_in0_max.attr, 431 &dev_attr_in1_max.attr, 432 &dev_attr_in2_max.attr, 433 &dev_attr_in3_max.attr, 434 &sensor_dev_attr_in0_alarm.dev_attr.attr, 435 &sensor_dev_attr_in1_alarm.dev_attr.attr, 436 &sensor_dev_attr_in2_alarm.dev_attr.attr, 437 &sensor_dev_attr_in3_alarm.dev_attr.attr, 438 &sensor_dev_attr_in0_beep.dev_attr.attr, 439 &sensor_dev_attr_in1_beep.dev_attr.attr, 440 &sensor_dev_attr_in2_beep.dev_attr.attr, 441 &sensor_dev_attr_in3_beep.dev_attr.attr, 442 443 &dev_attr_fan1_auto.attr, 444 &sensor_dev_attr_fan1_input.dev_attr.attr, 445 &sensor_dev_attr_fan2_input.dev_attr.attr, 446 &sensor_dev_attr_fan1_min.dev_attr.attr, 447 &sensor_dev_attr_fan2_min.dev_attr.attr, 448 &sensor_dev_attr_fan1_div.dev_attr.attr, 449 &sensor_dev_attr_fan2_div.dev_attr.attr, 450 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 451 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 452 &sensor_dev_attr_fan1_beep.dev_attr.attr, 453 &sensor_dev_attr_fan2_beep.dev_attr.attr, 454 455 &dev_attr_temp1_input.attr, 456 &dev_attr_temp1_max.attr, 457 &dev_attr_temp1_max_hyst.attr, 458 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 459 &sensor_dev_attr_temp1_beep.dev_attr.attr, 460 461 &dev_attr_alarms.attr, 462 &dev_attr_beep_enable.attr, 463 &dev_attr_beep_mask.attr, 464 NULL 465 }; 466 467 static const struct attribute_group gl518_group = { 468 .attrs = gl518_attributes, 469 }; 470 471 static struct attribute *gl518_attributes_r80[] = { 472 &dev_attr_in0_input.attr, 473 &dev_attr_in1_input.attr, 474 &dev_attr_in2_input.attr, 475 NULL 476 }; 477 478 static const struct attribute_group gl518_group_r80 = { 479 .attrs = gl518_attributes_r80, 480 }; 481 482 /* 483 * Real code 484 */ 485 486 /* Return 0 if detection is successful, -ENODEV otherwise */ 487 static int gl518_detect(struct i2c_client *client, int kind, 488 struct i2c_board_info *info) 489 { 490 struct i2c_adapter *adapter = client->adapter; 491 int i; 492 493 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 494 I2C_FUNC_SMBUS_WORD_DATA)) 495 return -ENODEV; 496 497 /* Now, we do the remaining detection. */ 498 499 if (kind < 0) { 500 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 501 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 502 return -ENODEV; 503 } 504 505 /* Determine the chip type. */ 506 if (kind <= 0) { 507 i = gl518_read_value(client, GL518_REG_REVISION); 508 if (i == 0x00) { 509 kind = gl518sm_r00; 510 } else if (i == 0x80) { 511 kind = gl518sm_r80; 512 } else { 513 if (kind <= 0) 514 dev_info(&adapter->dev, 515 "Ignoring 'force' parameter for unknown " 516 "chip at adapter %d, address 0x%02x\n", 517 i2c_adapter_id(adapter), client->addr); 518 return -ENODEV; 519 } 520 } 521 522 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); 523 524 return 0; 525 } 526 527 static int gl518_probe(struct i2c_client *client, 528 const struct i2c_device_id *id) 529 { 530 struct gl518_data *data; 531 int err, revision; 532 533 data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL); 534 if (!data) { 535 err = -ENOMEM; 536 goto exit; 537 } 538 539 i2c_set_clientdata(client, data); 540 revision = gl518_read_value(client, GL518_REG_REVISION); 541 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; 542 mutex_init(&data->update_lock); 543 544 /* Initialize the GL518SM chip */ 545 data->alarm_mask = 0xff; 546 gl518_init_client(client); 547 548 /* Register sysfs hooks */ 549 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group))) 550 goto exit_free; 551 if (data->type == gl518sm_r80) 552 if ((err = sysfs_create_group(&client->dev.kobj, 553 &gl518_group_r80))) 554 goto exit_remove_files; 555 556 data->hwmon_dev = hwmon_device_register(&client->dev); 557 if (IS_ERR(data->hwmon_dev)) { 558 err = PTR_ERR(data->hwmon_dev); 559 goto exit_remove_files; 560 } 561 562 return 0; 563 564 exit_remove_files: 565 sysfs_remove_group(&client->dev.kobj, &gl518_group); 566 if (data->type == gl518sm_r80) 567 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 568 exit_free: 569 kfree(data); 570 exit: 571 return err; 572 } 573 574 575 /* Called when we have found a new GL518SM. 576 Note that we preserve D4:NoFan2 and D2:beep_enable. */ 577 static void gl518_init_client(struct i2c_client *client) 578 { 579 /* Make sure we leave D7:Reset untouched */ 580 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 581 582 /* Comparator mode (D3=0), standby mode (D6=0) */ 583 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 584 585 /* Never interrupts */ 586 gl518_write_value(client, GL518_REG_MASK, 0x00); 587 588 /* Clear status register (D5=1), start (D6=1) */ 589 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 590 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 591 } 592 593 static int gl518_remove(struct i2c_client *client) 594 { 595 struct gl518_data *data = i2c_get_clientdata(client); 596 597 hwmon_device_unregister(data->hwmon_dev); 598 sysfs_remove_group(&client->dev.kobj, &gl518_group); 599 if (data->type == gl518sm_r80) 600 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 601 602 kfree(data); 603 return 0; 604 } 605 606 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 607 GL518 uses a high-byte first convention, which is exactly opposite to 608 the SMBus standard. */ 609 static int gl518_read_value(struct i2c_client *client, u8 reg) 610 { 611 if ((reg >= 0x07) && (reg <= 0x0c)) 612 return swab16(i2c_smbus_read_word_data(client, reg)); 613 else 614 return i2c_smbus_read_byte_data(client, reg); 615 } 616 617 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 618 { 619 if ((reg >= 0x07) && (reg <= 0x0c)) 620 return i2c_smbus_write_word_data(client, reg, swab16(value)); 621 else 622 return i2c_smbus_write_byte_data(client, reg, value); 623 } 624 625 static struct gl518_data *gl518_update_device(struct device *dev) 626 { 627 struct i2c_client *client = to_i2c_client(dev); 628 struct gl518_data *data = i2c_get_clientdata(client); 629 int val; 630 631 mutex_lock(&data->update_lock); 632 633 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 634 || !data->valid) { 635 dev_dbg(&client->dev, "Starting gl518 update\n"); 636 637 data->alarms = gl518_read_value(client, GL518_REG_INT); 638 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 639 640 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 641 data->voltage_min[0] = val & 0xff; 642 data->voltage_max[0] = (val >> 8) & 0xff; 643 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 644 data->voltage_min[1] = val & 0xff; 645 data->voltage_max[1] = (val >> 8) & 0xff; 646 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 647 data->voltage_min[2] = val & 0xff; 648 data->voltage_max[2] = (val >> 8) & 0xff; 649 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 650 data->voltage_min[3] = val & 0xff; 651 data->voltage_max[3] = (val >> 8) & 0xff; 652 653 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 654 data->fan_in[0] = (val >> 8) & 0xff; 655 data->fan_in[1] = val & 0xff; 656 657 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 658 data->fan_min[0] = (val >> 8) & 0xff; 659 data->fan_min[1] = val & 0xff; 660 661 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 662 data->temp_max = 663 gl518_read_value(client, GL518_REG_TEMP_MAX); 664 data->temp_hyst = 665 gl518_read_value(client, GL518_REG_TEMP_HYST); 666 667 val = gl518_read_value(client, GL518_REG_MISC); 668 data->fan_div[0] = (val >> 6) & 0x03; 669 data->fan_div[1] = (val >> 4) & 0x03; 670 data->fan_auto1 = (val >> 3) & 0x01; 671 672 data->alarms &= data->alarm_mask; 673 674 val = gl518_read_value(client, GL518_REG_CONF); 675 data->beep_enable = (val >> 2) & 1; 676 677 if (data->type != gl518sm_r00) { 678 data->voltage_in[0] = 679 gl518_read_value(client, GL518_REG_VDD); 680 data->voltage_in[1] = 681 gl518_read_value(client, GL518_REG_VIN1); 682 data->voltage_in[2] = 683 gl518_read_value(client, GL518_REG_VIN2); 684 } 685 data->voltage_in[3] = 686 gl518_read_value(client, GL518_REG_VIN3); 687 688 data->last_updated = jiffies; 689 data->valid = 1; 690 } 691 692 mutex_unlock(&data->update_lock); 693 694 return data; 695 } 696 697 static int __init sensors_gl518sm_init(void) 698 { 699 return i2c_add_driver(&gl518_driver); 700 } 701 702 static void __exit sensors_gl518sm_exit(void) 703 { 704 i2c_del_driver(&gl518_driver); 705 } 706 707 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 708 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 709 "Hong-Gunn Chew <hglinux@gunnet.org>"); 710 MODULE_DESCRIPTION("GL518SM driver"); 711 MODULE_LICENSE("GPL"); 712 713 module_init(sensors_gl518sm_init); 714 module_exit(sensors_gl518sm_exit); 715