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 i2c_client client; 118 struct device *hwmon_dev; 119 enum chips type; 120 121 struct mutex update_lock; 122 char valid; /* !=0 if following fields are valid */ 123 unsigned long last_updated; /* In jiffies */ 124 125 u8 voltage_in[4]; /* Register values; [0] = VDD */ 126 u8 voltage_min[4]; /* Register values; [0] = VDD */ 127 u8 voltage_max[4]; /* Register values; [0] = VDD */ 128 u8 fan_in[2]; 129 u8 fan_min[2]; 130 u8 fan_div[2]; /* Register encoding, shifted right */ 131 u8 fan_auto1; /* Boolean */ 132 u8 temp_in; /* Register values */ 133 u8 temp_max; /* Register values */ 134 u8 temp_hyst; /* Register values */ 135 u8 alarms; /* Register value */ 136 u8 alarm_mask; 137 u8 beep_mask; /* Register value */ 138 u8 beep_enable; /* Boolean */ 139 }; 140 141 static int gl518_attach_adapter(struct i2c_adapter *adapter); 142 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind); 143 static void gl518_init_client(struct i2c_client *client); 144 static int gl518_detach_client(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 /* This is the driver that will be inserted */ 150 static struct i2c_driver gl518_driver = { 151 .driver = { 152 .name = "gl518sm", 153 }, 154 .attach_adapter = gl518_attach_adapter, 155 .detach_client = gl518_detach_client, 156 }; 157 158 /* 159 * Sysfs stuff 160 */ 161 162 #define show(type, suffix, value) \ 163 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ 164 { \ 165 struct gl518_data *data = gl518_update_device(dev); \ 166 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ 167 } 168 169 show(TEMP, temp_input1, temp_in); 170 show(TEMP, temp_max1, temp_max); 171 show(TEMP, temp_hyst1, temp_hyst); 172 show(BOOL, fan_auto1, fan_auto1); 173 show(VDD, in_input0, voltage_in[0]); 174 show(IN, in_input1, voltage_in[1]); 175 show(IN, in_input2, voltage_in[2]); 176 show(IN, in_input3, voltage_in[3]); 177 show(VDD, in_min0, voltage_min[0]); 178 show(IN, in_min1, voltage_min[1]); 179 show(IN, in_min2, voltage_min[2]); 180 show(IN, in_min3, voltage_min[3]); 181 show(VDD, in_max0, voltage_max[0]); 182 show(IN, in_max1, voltage_max[1]); 183 show(IN, in_max2, voltage_max[2]); 184 show(IN, in_max3, voltage_max[3]); 185 show(RAW, alarms, alarms); 186 show(BOOL, beep_enable, beep_enable); 187 show(BEEP_MASK, beep_mask, beep_mask); 188 189 static ssize_t show_fan_input(struct device *dev, 190 struct device_attribute *attr, char *buf) 191 { 192 int nr = to_sensor_dev_attr(attr)->index; 193 struct gl518_data *data = gl518_update_device(dev); 194 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], 195 DIV_FROM_REG(data->fan_div[nr]))); 196 } 197 198 static ssize_t show_fan_min(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_min[nr], 204 DIV_FROM_REG(data->fan_div[nr]))); 205 } 206 207 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr])); 213 } 214 215 #define set(type, suffix, value, reg) \ 216 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 217 size_t count) \ 218 { \ 219 struct i2c_client *client = to_i2c_client(dev); \ 220 struct gl518_data *data = i2c_get_clientdata(client); \ 221 long val = simple_strtol(buf, NULL, 10); \ 222 \ 223 mutex_lock(&data->update_lock); \ 224 data->value = type##_TO_REG(val); \ 225 gl518_write_value(client, reg, data->value); \ 226 mutex_unlock(&data->update_lock); \ 227 return count; \ 228 } 229 230 #define set_bits(type, suffix, value, reg, mask, shift) \ 231 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ 232 size_t count) \ 233 { \ 234 struct i2c_client *client = to_i2c_client(dev); \ 235 struct gl518_data *data = i2c_get_clientdata(client); \ 236 int regvalue; \ 237 unsigned long val = simple_strtoul(buf, NULL, 10); \ 238 \ 239 mutex_lock(&data->update_lock); \ 240 regvalue = gl518_read_value(client, reg); \ 241 data->value = type##_TO_REG(val); \ 242 regvalue = (regvalue & ~mask) | (data->value << shift); \ 243 gl518_write_value(client, reg, regvalue); \ 244 mutex_unlock(&data->update_lock); \ 245 return count; \ 246 } 247 248 #define set_low(type, suffix, value, reg) \ 249 set_bits(type, suffix, value, reg, 0x00ff, 0) 250 #define set_high(type, suffix, value, reg) \ 251 set_bits(type, suffix, value, reg, 0xff00, 8) 252 253 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); 254 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); 255 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); 256 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); 257 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); 258 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); 259 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); 260 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); 261 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); 262 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); 263 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); 264 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); 265 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); 266 267 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, 268 const char *buf, size_t count) 269 { 270 struct i2c_client *client = to_i2c_client(dev); 271 struct gl518_data *data = i2c_get_clientdata(client); 272 int nr = to_sensor_dev_attr(attr)->index; 273 int regvalue; 274 unsigned long val = simple_strtoul(buf, NULL, 10); 275 276 mutex_lock(&data->update_lock); 277 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); 278 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 279 regvalue = (regvalue & (0xff << (8 * nr))) 280 | (data->fan_min[nr] << (8 * (1 - nr))); 281 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); 282 283 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 284 if (data->fan_min[nr] == 0) 285 data->alarm_mask &= ~(0x20 << nr); 286 else 287 data->alarm_mask |= (0x20 << nr); 288 data->beep_mask &= data->alarm_mask; 289 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 290 291 mutex_unlock(&data->update_lock); 292 return count; 293 } 294 295 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, 296 const char *buf, size_t count) 297 { 298 struct i2c_client *client = to_i2c_client(dev); 299 struct gl518_data *data = i2c_get_clientdata(client); 300 int nr = to_sensor_dev_attr(attr)->index; 301 int regvalue; 302 unsigned long val = simple_strtoul(buf, NULL, 10); 303 304 switch (val) { 305 case 1: val = 0; break; 306 case 2: val = 1; break; 307 case 4: val = 2; break; 308 case 8: val = 3; break; 309 default: 310 dev_err(dev, "Invalid fan clock divider %lu, choose one " 311 "of 1, 2, 4 or 8\n", val); 312 return -EINVAL; 313 } 314 315 mutex_lock(&data->update_lock); 316 regvalue = gl518_read_value(client, GL518_REG_MISC); 317 data->fan_div[nr] = val; 318 regvalue = (regvalue & ~(0xc0 >> (2 * nr))) 319 | (data->fan_div[nr] << (6 - 2 * nr)); 320 gl518_write_value(client, GL518_REG_MISC, regvalue); 321 mutex_unlock(&data->update_lock); 322 return count; 323 } 324 325 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); 326 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); 327 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, 328 show_temp_hyst1, set_temp_hyst1); 329 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); 330 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); 331 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); 332 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, 333 show_fan_min, set_fan_min, 0); 334 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, 335 show_fan_min, set_fan_min, 1); 336 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, 337 show_fan_div, set_fan_div, 0); 338 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, 339 show_fan_div, set_fan_div, 1); 340 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); 341 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); 342 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); 343 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); 344 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); 345 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); 346 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); 347 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); 348 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); 349 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); 350 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); 351 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); 352 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 353 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, 354 show_beep_enable, set_beep_enable); 355 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, 356 show_beep_mask, set_beep_mask); 357 358 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 359 char *buf) 360 { 361 int bitnr = to_sensor_dev_attr(attr)->index; 362 struct gl518_data *data = gl518_update_device(dev); 363 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 364 } 365 366 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 367 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 368 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 369 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 370 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 371 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); 372 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); 373 374 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 375 char *buf) 376 { 377 int bitnr = to_sensor_dev_attr(attr)->index; 378 struct gl518_data *data = gl518_update_device(dev); 379 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 380 } 381 382 static ssize_t set_beep(struct device *dev, struct device_attribute *attr, 383 const char *buf, size_t count) 384 { 385 struct i2c_client *client = to_i2c_client(dev); 386 struct gl518_data *data = i2c_get_clientdata(client); 387 int bitnr = to_sensor_dev_attr(attr)->index; 388 unsigned long bit; 389 390 bit = simple_strtoul(buf, NULL, 10); 391 if (bit & ~1) 392 return -EINVAL; 393 394 mutex_lock(&data->update_lock); 395 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 396 if (bit) 397 data->beep_mask |= (1 << bitnr); 398 else 399 data->beep_mask &= ~(1 << bitnr); 400 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); 401 mutex_unlock(&data->update_lock); 402 return count; 403 } 404 405 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); 406 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); 407 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); 408 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); 409 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); 410 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); 411 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); 412 413 static struct attribute *gl518_attributes[] = { 414 &dev_attr_in3_input.attr, 415 &dev_attr_in0_min.attr, 416 &dev_attr_in1_min.attr, 417 &dev_attr_in2_min.attr, 418 &dev_attr_in3_min.attr, 419 &dev_attr_in0_max.attr, 420 &dev_attr_in1_max.attr, 421 &dev_attr_in2_max.attr, 422 &dev_attr_in3_max.attr, 423 &sensor_dev_attr_in0_alarm.dev_attr.attr, 424 &sensor_dev_attr_in1_alarm.dev_attr.attr, 425 &sensor_dev_attr_in2_alarm.dev_attr.attr, 426 &sensor_dev_attr_in3_alarm.dev_attr.attr, 427 &sensor_dev_attr_in0_beep.dev_attr.attr, 428 &sensor_dev_attr_in1_beep.dev_attr.attr, 429 &sensor_dev_attr_in2_beep.dev_attr.attr, 430 &sensor_dev_attr_in3_beep.dev_attr.attr, 431 432 &dev_attr_fan1_auto.attr, 433 &sensor_dev_attr_fan1_input.dev_attr.attr, 434 &sensor_dev_attr_fan2_input.dev_attr.attr, 435 &sensor_dev_attr_fan1_min.dev_attr.attr, 436 &sensor_dev_attr_fan2_min.dev_attr.attr, 437 &sensor_dev_attr_fan1_div.dev_attr.attr, 438 &sensor_dev_attr_fan2_div.dev_attr.attr, 439 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 440 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 441 &sensor_dev_attr_fan1_beep.dev_attr.attr, 442 &sensor_dev_attr_fan2_beep.dev_attr.attr, 443 444 &dev_attr_temp1_input.attr, 445 &dev_attr_temp1_max.attr, 446 &dev_attr_temp1_max_hyst.attr, 447 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 448 &sensor_dev_attr_temp1_beep.dev_attr.attr, 449 450 &dev_attr_alarms.attr, 451 &dev_attr_beep_enable.attr, 452 &dev_attr_beep_mask.attr, 453 NULL 454 }; 455 456 static const struct attribute_group gl518_group = { 457 .attrs = gl518_attributes, 458 }; 459 460 static struct attribute *gl518_attributes_r80[] = { 461 &dev_attr_in0_input.attr, 462 &dev_attr_in1_input.attr, 463 &dev_attr_in2_input.attr, 464 NULL 465 }; 466 467 static const struct attribute_group gl518_group_r80 = { 468 .attrs = gl518_attributes_r80, 469 }; 470 471 /* 472 * Real code 473 */ 474 475 static int gl518_attach_adapter(struct i2c_adapter *adapter) 476 { 477 if (!(adapter->class & I2C_CLASS_HWMON)) 478 return 0; 479 return i2c_probe(adapter, &addr_data, gl518_detect); 480 } 481 482 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind) 483 { 484 int i; 485 struct i2c_client *client; 486 struct gl518_data *data; 487 int err = 0; 488 489 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 490 I2C_FUNC_SMBUS_WORD_DATA)) 491 goto exit; 492 493 /* OK. For now, we presume we have a valid client. We now create the 494 client structure, even though we cannot fill it completely yet. 495 But it allows us to access gl518_{read,write}_value. */ 496 497 if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) { 498 err = -ENOMEM; 499 goto exit; 500 } 501 502 client = &data->client; 503 i2c_set_clientdata(client, data); 504 505 client->addr = address; 506 client->adapter = adapter; 507 client->driver = &gl518_driver; 508 509 /* Now, we do the remaining detection. */ 510 511 if (kind < 0) { 512 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) 513 || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) 514 goto exit_free; 515 } 516 517 /* Determine the chip type. */ 518 if (kind <= 0) { 519 i = gl518_read_value(client, GL518_REG_REVISION); 520 if (i == 0x00) { 521 kind = gl518sm_r00; 522 } else if (i == 0x80) { 523 kind = gl518sm_r80; 524 } else { 525 if (kind <= 0) 526 dev_info(&adapter->dev, 527 "Ignoring 'force' parameter for unknown " 528 "chip at adapter %d, address 0x%02x\n", 529 i2c_adapter_id(adapter), address); 530 goto exit_free; 531 } 532 } 533 534 /* Fill in the remaining client fields */ 535 strlcpy(client->name, "gl518sm", I2C_NAME_SIZE); 536 data->type = kind; 537 mutex_init(&data->update_lock); 538 539 /* Tell the I2C layer a new client has arrived */ 540 if ((err = i2c_attach_client(client))) 541 goto exit_free; 542 543 /* Initialize the GL518SM chip */ 544 data->alarm_mask = 0xff; 545 gl518_init_client(client); 546 547 /* Register sysfs hooks */ 548 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group))) 549 goto exit_detach; 550 if (data->type == gl518sm_r80) 551 if ((err = sysfs_create_group(&client->dev.kobj, 552 &gl518_group_r80))) 553 goto exit_remove_files; 554 555 data->hwmon_dev = hwmon_device_register(&client->dev); 556 if (IS_ERR(data->hwmon_dev)) { 557 err = PTR_ERR(data->hwmon_dev); 558 goto exit_remove_files; 559 } 560 561 return 0; 562 563 exit_remove_files: 564 sysfs_remove_group(&client->dev.kobj, &gl518_group); 565 if (data->type == gl518sm_r80) 566 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 567 exit_detach: 568 i2c_detach_client(client); 569 exit_free: 570 kfree(data); 571 exit: 572 return err; 573 } 574 575 576 /* Called when we have found a new GL518SM. 577 Note that we preserve D4:NoFan2 and D2:beep_enable. */ 578 static void gl518_init_client(struct i2c_client *client) 579 { 580 /* Make sure we leave D7:Reset untouched */ 581 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; 582 583 /* Comparator mode (D3=0), standby mode (D6=0) */ 584 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); 585 586 /* Never interrupts */ 587 gl518_write_value(client, GL518_REG_MASK, 0x00); 588 589 /* Clear status register (D5=1), start (D6=1) */ 590 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); 591 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); 592 } 593 594 static int gl518_detach_client(struct i2c_client *client) 595 { 596 struct gl518_data *data = i2c_get_clientdata(client); 597 int err; 598 599 hwmon_device_unregister(data->hwmon_dev); 600 sysfs_remove_group(&client->dev.kobj, &gl518_group); 601 if (data->type == gl518sm_r80) 602 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80); 603 604 if ((err = i2c_detach_client(client))) 605 return err; 606 607 kfree(data); 608 return 0; 609 } 610 611 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized 612 GL518 uses a high-byte first convention, which is exactly opposite to 613 the SMBus standard. */ 614 static int gl518_read_value(struct i2c_client *client, u8 reg) 615 { 616 if ((reg >= 0x07) && (reg <= 0x0c)) 617 return swab16(i2c_smbus_read_word_data(client, reg)); 618 else 619 return i2c_smbus_read_byte_data(client, reg); 620 } 621 622 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) 623 { 624 if ((reg >= 0x07) && (reg <= 0x0c)) 625 return i2c_smbus_write_word_data(client, reg, swab16(value)); 626 else 627 return i2c_smbus_write_byte_data(client, reg, value); 628 } 629 630 static struct gl518_data *gl518_update_device(struct device *dev) 631 { 632 struct i2c_client *client = to_i2c_client(dev); 633 struct gl518_data *data = i2c_get_clientdata(client); 634 int val; 635 636 mutex_lock(&data->update_lock); 637 638 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 639 || !data->valid) { 640 dev_dbg(&client->dev, "Starting gl518 update\n"); 641 642 data->alarms = gl518_read_value(client, GL518_REG_INT); 643 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); 644 645 val = gl518_read_value(client, GL518_REG_VDD_LIMIT); 646 data->voltage_min[0] = val & 0xff; 647 data->voltage_max[0] = (val >> 8) & 0xff; 648 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); 649 data->voltage_min[1] = val & 0xff; 650 data->voltage_max[1] = (val >> 8) & 0xff; 651 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); 652 data->voltage_min[2] = val & 0xff; 653 data->voltage_max[2] = (val >> 8) & 0xff; 654 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); 655 data->voltage_min[3] = val & 0xff; 656 data->voltage_max[3] = (val >> 8) & 0xff; 657 658 val = gl518_read_value(client, GL518_REG_FAN_COUNT); 659 data->fan_in[0] = (val >> 8) & 0xff; 660 data->fan_in[1] = val & 0xff; 661 662 val = gl518_read_value(client, GL518_REG_FAN_LIMIT); 663 data->fan_min[0] = (val >> 8) & 0xff; 664 data->fan_min[1] = val & 0xff; 665 666 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); 667 data->temp_max = 668 gl518_read_value(client, GL518_REG_TEMP_MAX); 669 data->temp_hyst = 670 gl518_read_value(client, GL518_REG_TEMP_HYST); 671 672 val = gl518_read_value(client, GL518_REG_MISC); 673 data->fan_div[0] = (val >> 6) & 0x03; 674 data->fan_div[1] = (val >> 4) & 0x03; 675 data->fan_auto1 = (val >> 3) & 0x01; 676 677 data->alarms &= data->alarm_mask; 678 679 val = gl518_read_value(client, GL518_REG_CONF); 680 data->beep_enable = (val >> 2) & 1; 681 682 if (data->type != gl518sm_r00) { 683 data->voltage_in[0] = 684 gl518_read_value(client, GL518_REG_VDD); 685 data->voltage_in[1] = 686 gl518_read_value(client, GL518_REG_VIN1); 687 data->voltage_in[2] = 688 gl518_read_value(client, GL518_REG_VIN2); 689 } 690 data->voltage_in[3] = 691 gl518_read_value(client, GL518_REG_VIN3); 692 693 data->last_updated = jiffies; 694 data->valid = 1; 695 } 696 697 mutex_unlock(&data->update_lock); 698 699 return data; 700 } 701 702 static int __init sensors_gl518sm_init(void) 703 { 704 return i2c_add_driver(&gl518_driver); 705 } 706 707 static void __exit sensors_gl518sm_exit(void) 708 { 709 i2c_del_driver(&gl518_driver); 710 } 711 712 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 713 "Kyosti Malkki <kmalkki@cc.hut.fi> and " 714 "Hong-Gunn Chew <hglinux@gunnet.org>"); 715 MODULE_DESCRIPTION("GL518SM driver"); 716 MODULE_LICENSE("GPL"); 717 718 module_init(sensors_gl518sm_init); 719 module_exit(sensors_gl518sm_exit); 720