1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware 4 * monitoring 5 * Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, 6 * Philip Edelbrock <phil@netroedge.com>, 7 * and Mark Studebaker <mdsxyz123@yahoo.com> 8 * Copyright (c) 2007 - 2008 Jean Delvare <jdelvare@suse.de> 9 */ 10 11 /* 12 * Supports following chips: 13 * 14 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 15 * as99127f 7 3 0 3 0x31 0x12c3 yes no 16 * as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no 17 * w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes 18 * w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes 19 * w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no 20 * 21 */ 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/module.h> 26 #include <linux/init.h> 27 #include <linux/slab.h> 28 #include <linux/jiffies.h> 29 #include <linux/i2c.h> 30 #include <linux/hwmon.h> 31 #include <linux/hwmon-vid.h> 32 #include <linux/hwmon-sysfs.h> 33 #include <linux/sysfs.h> 34 #include <linux/err.h> 35 #include <linux/mutex.h> 36 37 #ifdef CONFIG_ISA 38 #include <linux/platform_device.h> 39 #include <linux/ioport.h> 40 #include <linux/io.h> 41 #endif 42 43 #include "lm75.h" 44 45 /* Addresses to scan */ 46 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 47 0x2e, 0x2f, I2C_CLIENT_END }; 48 49 enum chips { w83781d, w83782d, w83783s, as99127f }; 50 51 /* Insmod parameters */ 52 static unsigned short force_subclients[4]; 53 module_param_array(force_subclients, short, NULL, 0); 54 MODULE_PARM_DESC(force_subclients, 55 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); 56 57 static bool reset; 58 module_param(reset, bool, 0); 59 MODULE_PARM_DESC(reset, "Set to one to reset chip on load"); 60 61 static bool init = 1; 62 module_param(init, bool, 0); 63 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization"); 64 65 /* Constants specified below */ 66 67 /* Length of ISA address segment */ 68 #define W83781D_EXTENT 8 69 70 /* Where are the ISA address/data registers relative to the base address */ 71 #define W83781D_ADDR_REG_OFFSET 5 72 #define W83781D_DATA_REG_OFFSET 6 73 74 /* The device registers */ 75 /* in nr from 0 to 8 */ 76 #define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \ 77 (0x554 + (((nr) - 7) * 2))) 78 #define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \ 79 (0x555 + (((nr) - 7) * 2))) 80 #define W83781D_REG_IN(nr) ((nr < 7) ? (0x20 + (nr)) : \ 81 (0x550 + (nr) - 7)) 82 83 /* fan nr from 0 to 2 */ 84 #define W83781D_REG_FAN_MIN(nr) (0x3b + (nr)) 85 #define W83781D_REG_FAN(nr) (0x28 + (nr)) 86 87 #define W83781D_REG_BANK 0x4E 88 #define W83781D_REG_TEMP2_CONFIG 0x152 89 #define W83781D_REG_TEMP3_CONFIG 0x252 90 /* temp nr from 1 to 3 */ 91 #define W83781D_REG_TEMP(nr) ((nr == 3) ? (0x0250) : \ 92 ((nr == 2) ? (0x0150) : \ 93 (0x27))) 94 #define W83781D_REG_TEMP_HYST(nr) ((nr == 3) ? (0x253) : \ 95 ((nr == 2) ? (0x153) : \ 96 (0x3A))) 97 #define W83781D_REG_TEMP_OVER(nr) ((nr == 3) ? (0x255) : \ 98 ((nr == 2) ? (0x155) : \ 99 (0x39))) 100 101 #define W83781D_REG_CONFIG 0x40 102 103 /* Interrupt status (W83781D, AS99127F) */ 104 #define W83781D_REG_ALARM1 0x41 105 #define W83781D_REG_ALARM2 0x42 106 107 /* Real-time status (W83782D, W83783S) */ 108 #define W83782D_REG_ALARM1 0x459 109 #define W83782D_REG_ALARM2 0x45A 110 #define W83782D_REG_ALARM3 0x45B 111 112 #define W83781D_REG_BEEP_CONFIG 0x4D 113 #define W83781D_REG_BEEP_INTS1 0x56 114 #define W83781D_REG_BEEP_INTS2 0x57 115 #define W83781D_REG_BEEP_INTS3 0x453 /* not on W83781D */ 116 117 #define W83781D_REG_VID_FANDIV 0x47 118 119 #define W83781D_REG_CHIPID 0x49 120 #define W83781D_REG_WCHIPID 0x58 121 #define W83781D_REG_CHIPMAN 0x4F 122 #define W83781D_REG_PIN 0x4B 123 124 /* 782D/783S only */ 125 #define W83781D_REG_VBAT 0x5D 126 127 /* PWM 782D (1-4) and 783S (1-2) only */ 128 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F }; 129 #define W83781D_REG_PWMCLK12 0x5C 130 #define W83781D_REG_PWMCLK34 0x45C 131 132 #define W83781D_REG_I2C_ADDR 0x48 133 #define W83781D_REG_I2C_SUBADDR 0x4A 134 135 /* 136 * The following are undocumented in the data sheets however we 137 * received the information in an email from Winbond tech support 138 */ 139 /* Sensor selection - not on 781d */ 140 #define W83781D_REG_SCFG1 0x5D 141 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 }; 142 143 #define W83781D_REG_SCFG2 0x59 144 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 }; 145 146 #define W83781D_DEFAULT_BETA 3435 147 148 /* Conversions */ 149 #define IN_TO_REG(val) clamp_val(((val) + 8) / 16, 0, 255) 150 #define IN_FROM_REG(val) ((val) * 16) 151 152 static inline u8 153 FAN_TO_REG(long rpm, int div) 154 { 155 if (rpm == 0) 156 return 255; 157 rpm = clamp_val(rpm, 1, 1000000); 158 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 159 } 160 161 static inline long 162 FAN_FROM_REG(u8 val, int div) 163 { 164 if (val == 0) 165 return -1; 166 if (val == 255) 167 return 0; 168 return 1350000 / (val * div); 169 } 170 171 #define TEMP_TO_REG(val) clamp_val((val) / 1000, -127, 128) 172 #define TEMP_FROM_REG(val) ((val) * 1000) 173 174 #define BEEP_MASK_FROM_REG(val, type) ((type) == as99127f ? \ 175 (~(val)) & 0x7fff : (val) & 0xff7fff) 176 #define BEEP_MASK_TO_REG(val, type) ((type) == as99127f ? \ 177 (~(val)) & 0x7fff : (val) & 0xff7fff) 178 179 #define DIV_FROM_REG(val) (1 << (val)) 180 181 static inline u8 182 DIV_TO_REG(long val, enum chips type) 183 { 184 int i; 185 val = clamp_val(val, 1, 186 ((type == w83781d || type == as99127f) ? 8 : 128)) >> 1; 187 for (i = 0; i < 7; i++) { 188 if (val == 0) 189 break; 190 val >>= 1; 191 } 192 return i; 193 } 194 195 struct w83781d_data { 196 struct i2c_client *client; 197 struct device *hwmon_dev; 198 struct mutex lock; 199 enum chips type; 200 201 /* For ISA device only */ 202 const char *name; 203 int isa_addr; 204 205 struct mutex update_lock; 206 char valid; /* !=0 if following fields are valid */ 207 unsigned long last_updated; /* In jiffies */ 208 209 struct i2c_client *lm75[2]; /* for secondary I2C addresses */ 210 /* array of 2 pointers to subclients */ 211 212 u8 in[9]; /* Register value - 8 & 9 for 782D only */ 213 u8 in_max[9]; /* Register value - 8 & 9 for 782D only */ 214 u8 in_min[9]; /* Register value - 8 & 9 for 782D only */ 215 u8 fan[3]; /* Register value */ 216 u8 fan_min[3]; /* Register value */ 217 s8 temp; /* Register value */ 218 s8 temp_max; /* Register value */ 219 s8 temp_max_hyst; /* Register value */ 220 u16 temp_add[2]; /* Register value */ 221 u16 temp_max_add[2]; /* Register value */ 222 u16 temp_max_hyst_add[2]; /* Register value */ 223 u8 fan_div[3]; /* Register encoding, shifted right */ 224 u8 vid; /* Register encoding, combined */ 225 u32 alarms; /* Register encoding, combined */ 226 u32 beep_mask; /* Register encoding, combined */ 227 u8 pwm[4]; /* Register value */ 228 u8 pwm2_enable; /* Boolean */ 229 u16 sens[3]; /* 230 * 782D/783S only. 231 * 1 = pentium diode; 2 = 3904 diode; 232 * 4 = thermistor 233 */ 234 u8 vrm; 235 }; 236 237 static struct w83781d_data *w83781d_data_if_isa(void); 238 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid); 239 240 static int w83781d_read_value(struct w83781d_data *data, u16 reg); 241 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value); 242 static struct w83781d_data *w83781d_update_device(struct device *dev); 243 static void w83781d_init_device(struct device *dev); 244 245 /* following are the sysfs callback functions */ 246 #define show_in_reg(reg) \ 247 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 248 char *buf) \ 249 { \ 250 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 251 struct w83781d_data *data = w83781d_update_device(dev); \ 252 return sprintf(buf, "%ld\n", \ 253 (long)IN_FROM_REG(data->reg[attr->index])); \ 254 } 255 show_in_reg(in); 256 show_in_reg(in_min); 257 show_in_reg(in_max); 258 259 #define store_in_reg(REG, reg) \ 260 static ssize_t store_in_##reg(struct device *dev, struct device_attribute \ 261 *da, const char *buf, size_t count) \ 262 { \ 263 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 264 struct w83781d_data *data = dev_get_drvdata(dev); \ 265 int nr = attr->index; \ 266 unsigned long val; \ 267 int err = kstrtoul(buf, 10, &val); \ 268 if (err) \ 269 return err; \ 270 mutex_lock(&data->update_lock); \ 271 data->in_##reg[nr] = IN_TO_REG(val); \ 272 w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \ 273 data->in_##reg[nr]); \ 274 \ 275 mutex_unlock(&data->update_lock); \ 276 return count; \ 277 } 278 store_in_reg(MIN, min); 279 store_in_reg(MAX, max); 280 281 #define sysfs_in_offsets(offset) \ 282 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 283 show_in, NULL, offset); \ 284 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 285 show_in_min, store_in_min, offset); \ 286 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 287 show_in_max, store_in_max, offset) 288 289 sysfs_in_offsets(0); 290 sysfs_in_offsets(1); 291 sysfs_in_offsets(2); 292 sysfs_in_offsets(3); 293 sysfs_in_offsets(4); 294 sysfs_in_offsets(5); 295 sysfs_in_offsets(6); 296 sysfs_in_offsets(7); 297 sysfs_in_offsets(8); 298 299 #define show_fan_reg(reg) \ 300 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 301 char *buf) \ 302 { \ 303 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 304 struct w83781d_data *data = w83781d_update_device(dev); \ 305 return sprintf(buf, "%ld\n", \ 306 FAN_FROM_REG(data->reg[attr->index], \ 307 DIV_FROM_REG(data->fan_div[attr->index]))); \ 308 } 309 show_fan_reg(fan); 310 show_fan_reg(fan_min); 311 312 static ssize_t 313 store_fan_min(struct device *dev, struct device_attribute *da, 314 const char *buf, size_t count) 315 { 316 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 317 struct w83781d_data *data = dev_get_drvdata(dev); 318 int nr = attr->index; 319 unsigned long val; 320 int err; 321 322 err = kstrtoul(buf, 10, &val); 323 if (err) 324 return err; 325 326 mutex_lock(&data->update_lock); 327 data->fan_min[nr] = 328 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 329 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), 330 data->fan_min[nr]); 331 332 mutex_unlock(&data->update_lock); 333 return count; 334 } 335 336 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 337 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 338 show_fan_min, store_fan_min, 0); 339 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 340 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 341 show_fan_min, store_fan_min, 1); 342 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 343 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR, 344 show_fan_min, store_fan_min, 2); 345 346 #define show_temp_reg(reg) \ 347 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 348 char *buf) \ 349 { \ 350 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 351 struct w83781d_data *data = w83781d_update_device(dev); \ 352 int nr = attr->index; \ 353 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 354 return sprintf(buf, "%d\n", \ 355 LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \ 356 } else { /* TEMP1 */ \ 357 return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \ 358 } \ 359 } 360 show_temp_reg(temp); 361 show_temp_reg(temp_max); 362 show_temp_reg(temp_max_hyst); 363 364 #define store_temp_reg(REG, reg) \ 365 static ssize_t store_temp_##reg(struct device *dev, \ 366 struct device_attribute *da, const char *buf, size_t count) \ 367 { \ 368 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 369 struct w83781d_data *data = dev_get_drvdata(dev); \ 370 int nr = attr->index; \ 371 long val; \ 372 int err = kstrtol(buf, 10, &val); \ 373 if (err) \ 374 return err; \ 375 mutex_lock(&data->update_lock); \ 376 \ 377 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 378 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \ 379 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 380 data->temp_##reg##_add[nr-2]); \ 381 } else { /* TEMP1 */ \ 382 data->temp_##reg = TEMP_TO_REG(val); \ 383 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 384 data->temp_##reg); \ 385 } \ 386 \ 387 mutex_unlock(&data->update_lock); \ 388 return count; \ 389 } 390 store_temp_reg(OVER, max); 391 store_temp_reg(HYST, max_hyst); 392 393 #define sysfs_temp_offsets(offset) \ 394 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 395 show_temp, NULL, offset); \ 396 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 397 show_temp_max, store_temp_max, offset); \ 398 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 399 show_temp_max_hyst, store_temp_max_hyst, offset); 400 401 sysfs_temp_offsets(1); 402 sysfs_temp_offsets(2); 403 sysfs_temp_offsets(3); 404 405 static ssize_t 406 cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) 407 { 408 struct w83781d_data *data = w83781d_update_device(dev); 409 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 410 } 411 412 static DEVICE_ATTR_RO(cpu0_vid); 413 414 static ssize_t 415 vrm_show(struct device *dev, struct device_attribute *attr, char *buf) 416 { 417 struct w83781d_data *data = dev_get_drvdata(dev); 418 return sprintf(buf, "%ld\n", (long) data->vrm); 419 } 420 421 static ssize_t 422 vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, 423 size_t count) 424 { 425 struct w83781d_data *data = dev_get_drvdata(dev); 426 unsigned long val; 427 int err; 428 429 err = kstrtoul(buf, 10, &val); 430 if (err) 431 return err; 432 data->vrm = clamp_val(val, 0, 255); 433 434 return count; 435 } 436 437 static DEVICE_ATTR_RW(vrm); 438 439 static ssize_t 440 alarms_show(struct device *dev, struct device_attribute *attr, char *buf) 441 { 442 struct w83781d_data *data = w83781d_update_device(dev); 443 return sprintf(buf, "%u\n", data->alarms); 444 } 445 446 static DEVICE_ATTR_RO(alarms); 447 448 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 449 char *buf) 450 { 451 struct w83781d_data *data = w83781d_update_device(dev); 452 int bitnr = to_sensor_dev_attr(attr)->index; 453 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 454 } 455 456 /* The W83781D has a single alarm bit for temp2 and temp3 */ 457 static ssize_t show_temp3_alarm(struct device *dev, 458 struct device_attribute *attr, char *buf) 459 { 460 struct w83781d_data *data = w83781d_update_device(dev); 461 int bitnr = (data->type == w83781d) ? 5 : 13; 462 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 463 } 464 465 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 466 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 467 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 468 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 469 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 470 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 471 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); 472 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16); 473 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17); 474 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 475 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 476 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); 477 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 478 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 479 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0); 480 481 static ssize_t beep_mask_show(struct device *dev, 482 struct device_attribute *attr, char *buf) 483 { 484 struct w83781d_data *data = w83781d_update_device(dev); 485 return sprintf(buf, "%ld\n", 486 (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type)); 487 } 488 489 static ssize_t 490 beep_mask_store(struct device *dev, struct device_attribute *attr, 491 const char *buf, size_t count) 492 { 493 struct w83781d_data *data = dev_get_drvdata(dev); 494 unsigned long val; 495 int err; 496 497 err = kstrtoul(buf, 10, &val); 498 if (err) 499 return err; 500 501 mutex_lock(&data->update_lock); 502 data->beep_mask &= 0x8000; /* preserve beep enable */ 503 data->beep_mask |= BEEP_MASK_TO_REG(val, data->type); 504 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, 505 data->beep_mask & 0xff); 506 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 507 (data->beep_mask >> 8) & 0xff); 508 if (data->type != w83781d && data->type != as99127f) { 509 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, 510 ((data->beep_mask) >> 16) & 0xff); 511 } 512 mutex_unlock(&data->update_lock); 513 514 return count; 515 } 516 517 static DEVICE_ATTR_RW(beep_mask); 518 519 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 520 char *buf) 521 { 522 struct w83781d_data *data = w83781d_update_device(dev); 523 int bitnr = to_sensor_dev_attr(attr)->index; 524 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 525 } 526 527 static ssize_t 528 store_beep(struct device *dev, struct device_attribute *attr, 529 const char *buf, size_t count) 530 { 531 struct w83781d_data *data = dev_get_drvdata(dev); 532 int bitnr = to_sensor_dev_attr(attr)->index; 533 u8 reg; 534 unsigned long bit; 535 int err; 536 537 err = kstrtoul(buf, 10, &bit); 538 if (err) 539 return err; 540 541 if (bit & ~1) 542 return -EINVAL; 543 544 mutex_lock(&data->update_lock); 545 if (bit) 546 data->beep_mask |= (1 << bitnr); 547 else 548 data->beep_mask &= ~(1 << bitnr); 549 550 if (bitnr < 8) { 551 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1); 552 if (bit) 553 reg |= (1 << bitnr); 554 else 555 reg &= ~(1 << bitnr); 556 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg); 557 } else if (bitnr < 16) { 558 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); 559 if (bit) 560 reg |= (1 << (bitnr - 8)); 561 else 562 reg &= ~(1 << (bitnr - 8)); 563 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg); 564 } else { 565 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3); 566 if (bit) 567 reg |= (1 << (bitnr - 16)); 568 else 569 reg &= ~(1 << (bitnr - 16)); 570 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg); 571 } 572 mutex_unlock(&data->update_lock); 573 574 return count; 575 } 576 577 /* The W83781D has a single beep bit for temp2 and temp3 */ 578 static ssize_t show_temp3_beep(struct device *dev, 579 struct device_attribute *attr, char *buf) 580 { 581 struct w83781d_data *data = w83781d_update_device(dev); 582 int bitnr = (data->type == w83781d) ? 5 : 13; 583 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 584 } 585 586 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 587 show_beep, store_beep, 0); 588 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, 589 show_beep, store_beep, 1); 590 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, 591 show_beep, store_beep, 2); 592 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, 593 show_beep, store_beep, 3); 594 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, 595 show_beep, store_beep, 8); 596 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR, 597 show_beep, store_beep, 9); 598 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR, 599 show_beep, store_beep, 10); 600 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR, 601 show_beep, store_beep, 16); 602 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR, 603 show_beep, store_beep, 17); 604 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, 605 show_beep, store_beep, 6); 606 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, 607 show_beep, store_beep, 7); 608 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR, 609 show_beep, store_beep, 11); 610 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 611 show_beep, store_beep, 4); 612 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, 613 show_beep, store_beep, 5); 614 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, 615 show_temp3_beep, store_beep, 13); 616 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 617 show_beep, store_beep, 15); 618 619 static ssize_t 620 show_fan_div(struct device *dev, struct device_attribute *da, char *buf) 621 { 622 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 623 struct w83781d_data *data = w83781d_update_device(dev); 624 return sprintf(buf, "%ld\n", 625 (long) DIV_FROM_REG(data->fan_div[attr->index])); 626 } 627 628 /* 629 * Note: we save and restore the fan minimum here, because its value is 630 * determined in part by the fan divisor. This follows the principle of 631 * least surprise; the user doesn't expect the fan minimum to change just 632 * because the divisor changed. 633 */ 634 static ssize_t 635 store_fan_div(struct device *dev, struct device_attribute *da, 636 const char *buf, size_t count) 637 { 638 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 639 struct w83781d_data *data = dev_get_drvdata(dev); 640 unsigned long min; 641 int nr = attr->index; 642 u8 reg; 643 unsigned long val; 644 int err; 645 646 err = kstrtoul(buf, 10, &val); 647 if (err) 648 return err; 649 650 mutex_lock(&data->update_lock); 651 652 /* Save fan_min */ 653 min = FAN_FROM_REG(data->fan_min[nr], 654 DIV_FROM_REG(data->fan_div[nr])); 655 656 data->fan_div[nr] = DIV_TO_REG(val, data->type); 657 658 reg = (w83781d_read_value(data, nr == 2 ? 659 W83781D_REG_PIN : W83781D_REG_VID_FANDIV) 660 & (nr == 0 ? 0xcf : 0x3f)) 661 | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6)); 662 w83781d_write_value(data, nr == 2 ? 663 W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg); 664 665 /* w83781d and as99127f don't have extended divisor bits */ 666 if (data->type != w83781d && data->type != as99127f) { 667 reg = (w83781d_read_value(data, W83781D_REG_VBAT) 668 & ~(1 << (5 + nr))) 669 | ((data->fan_div[nr] & 0x04) << (3 + nr)); 670 w83781d_write_value(data, W83781D_REG_VBAT, reg); 671 } 672 673 /* Restore fan_min */ 674 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 675 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]); 676 677 mutex_unlock(&data->update_lock); 678 return count; 679 } 680 681 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 682 show_fan_div, store_fan_div, 0); 683 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 684 show_fan_div, store_fan_div, 1); 685 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, 686 show_fan_div, store_fan_div, 2); 687 688 static ssize_t 689 show_pwm(struct device *dev, struct device_attribute *da, char *buf) 690 { 691 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 692 struct w83781d_data *data = w83781d_update_device(dev); 693 return sprintf(buf, "%d\n", (int)data->pwm[attr->index]); 694 } 695 696 static ssize_t 697 pwm2_enable_show(struct device *dev, struct device_attribute *da, char *buf) 698 { 699 struct w83781d_data *data = w83781d_update_device(dev); 700 return sprintf(buf, "%d\n", (int)data->pwm2_enable); 701 } 702 703 static ssize_t 704 store_pwm(struct device *dev, struct device_attribute *da, const char *buf, 705 size_t count) 706 { 707 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 708 struct w83781d_data *data = dev_get_drvdata(dev); 709 int nr = attr->index; 710 unsigned long val; 711 int err; 712 713 err = kstrtoul(buf, 10, &val); 714 if (err) 715 return err; 716 717 mutex_lock(&data->update_lock); 718 data->pwm[nr] = clamp_val(val, 0, 255); 719 w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]); 720 mutex_unlock(&data->update_lock); 721 return count; 722 } 723 724 static ssize_t 725 pwm2_enable_store(struct device *dev, struct device_attribute *da, 726 const char *buf, size_t count) 727 { 728 struct w83781d_data *data = dev_get_drvdata(dev); 729 unsigned long val; 730 u32 reg; 731 int err; 732 733 err = kstrtoul(buf, 10, &val); 734 if (err) 735 return err; 736 737 mutex_lock(&data->update_lock); 738 739 switch (val) { 740 case 0: 741 case 1: 742 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12); 743 w83781d_write_value(data, W83781D_REG_PWMCLK12, 744 (reg & 0xf7) | (val << 3)); 745 746 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 747 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, 748 (reg & 0xef) | (!val << 4)); 749 750 data->pwm2_enable = val; 751 break; 752 753 default: 754 mutex_unlock(&data->update_lock); 755 return -EINVAL; 756 } 757 758 mutex_unlock(&data->update_lock); 759 return count; 760 } 761 762 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0); 763 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1); 764 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2); 765 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3); 766 /* only PWM2 can be enabled/disabled */ 767 static DEVICE_ATTR_RW(pwm2_enable); 768 769 static ssize_t 770 show_sensor(struct device *dev, struct device_attribute *da, char *buf) 771 { 772 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 773 struct w83781d_data *data = w83781d_update_device(dev); 774 return sprintf(buf, "%d\n", (int)data->sens[attr->index]); 775 } 776 777 static ssize_t 778 store_sensor(struct device *dev, struct device_attribute *da, 779 const char *buf, size_t count) 780 { 781 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 782 struct w83781d_data *data = dev_get_drvdata(dev); 783 int nr = attr->index; 784 unsigned long val; 785 u32 tmp; 786 int err; 787 788 err = kstrtoul(buf, 10, &val); 789 if (err) 790 return err; 791 792 mutex_lock(&data->update_lock); 793 794 switch (val) { 795 case 1: /* PII/Celeron diode */ 796 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 797 w83781d_write_value(data, W83781D_REG_SCFG1, 798 tmp | BIT_SCFG1[nr]); 799 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 800 w83781d_write_value(data, W83781D_REG_SCFG2, 801 tmp | BIT_SCFG2[nr]); 802 data->sens[nr] = val; 803 break; 804 case 2: /* 3904 */ 805 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 806 w83781d_write_value(data, W83781D_REG_SCFG1, 807 tmp | BIT_SCFG1[nr]); 808 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 809 w83781d_write_value(data, W83781D_REG_SCFG2, 810 tmp & ~BIT_SCFG2[nr]); 811 data->sens[nr] = val; 812 break; 813 case W83781D_DEFAULT_BETA: 814 dev_warn(dev, 815 "Sensor type %d is deprecated, please use 4 instead\n", 816 W83781D_DEFAULT_BETA); 817 /* fall through */ 818 case 4: /* thermistor */ 819 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 820 w83781d_write_value(data, W83781D_REG_SCFG1, 821 tmp & ~BIT_SCFG1[nr]); 822 data->sens[nr] = val; 823 break; 824 default: 825 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n", 826 (long) val); 827 break; 828 } 829 830 mutex_unlock(&data->update_lock); 831 return count; 832 } 833 834 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, 835 show_sensor, store_sensor, 0); 836 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, 837 show_sensor, store_sensor, 1); 838 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, 839 show_sensor, store_sensor, 2); 840 841 /* 842 * Assumes that adapter is of I2C, not ISA variety. 843 * OTHERWISE DON'T CALL THIS 844 */ 845 static int 846 w83781d_detect_subclients(struct i2c_client *new_client) 847 { 848 int i, val1 = 0, id; 849 int err; 850 int address = new_client->addr; 851 unsigned short sc_addr[2]; 852 struct i2c_adapter *adapter = new_client->adapter; 853 struct w83781d_data *data = i2c_get_clientdata(new_client); 854 enum chips kind = data->type; 855 int num_sc = 1; 856 857 id = i2c_adapter_id(adapter); 858 859 if (force_subclients[0] == id && force_subclients[1] == address) { 860 for (i = 2; i <= 3; i++) { 861 if (force_subclients[i] < 0x48 || 862 force_subclients[i] > 0x4f) { 863 dev_err(&new_client->dev, 864 "Invalid subclient address %d; must be 0x48-0x4f\n", 865 force_subclients[i]); 866 err = -EINVAL; 867 goto ERROR_SC_1; 868 } 869 } 870 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR, 871 (force_subclients[2] & 0x07) | 872 ((force_subclients[3] & 0x07) << 4)); 873 sc_addr[0] = force_subclients[2]; 874 } else { 875 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR); 876 sc_addr[0] = 0x48 + (val1 & 0x07); 877 } 878 879 if (kind != w83783s) { 880 num_sc = 2; 881 if (force_subclients[0] == id && 882 force_subclients[1] == address) { 883 sc_addr[1] = force_subclients[3]; 884 } else { 885 sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07); 886 } 887 if (sc_addr[0] == sc_addr[1]) { 888 dev_err(&new_client->dev, 889 "Duplicate addresses 0x%x for subclients.\n", 890 sc_addr[0]); 891 err = -EBUSY; 892 goto ERROR_SC_2; 893 } 894 } 895 896 for (i = 0; i < num_sc; i++) { 897 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]); 898 if (!data->lm75[i]) { 899 dev_err(&new_client->dev, 900 "Subclient %d registration at address 0x%x failed.\n", 901 i, sc_addr[i]); 902 err = -ENOMEM; 903 if (i == 1) 904 goto ERROR_SC_3; 905 goto ERROR_SC_2; 906 } 907 } 908 909 return 0; 910 911 /* Undo inits in case of errors */ 912 ERROR_SC_3: 913 i2c_unregister_device(data->lm75[0]); 914 ERROR_SC_2: 915 ERROR_SC_1: 916 return err; 917 } 918 919 #define IN_UNIT_ATTRS(X) \ 920 &sensor_dev_attr_in##X##_input.dev_attr.attr, \ 921 &sensor_dev_attr_in##X##_min.dev_attr.attr, \ 922 &sensor_dev_attr_in##X##_max.dev_attr.attr, \ 923 &sensor_dev_attr_in##X##_alarm.dev_attr.attr, \ 924 &sensor_dev_attr_in##X##_beep.dev_attr.attr 925 926 #define FAN_UNIT_ATTRS(X) \ 927 &sensor_dev_attr_fan##X##_input.dev_attr.attr, \ 928 &sensor_dev_attr_fan##X##_min.dev_attr.attr, \ 929 &sensor_dev_attr_fan##X##_div.dev_attr.attr, \ 930 &sensor_dev_attr_fan##X##_alarm.dev_attr.attr, \ 931 &sensor_dev_attr_fan##X##_beep.dev_attr.attr 932 933 #define TEMP_UNIT_ATTRS(X) \ 934 &sensor_dev_attr_temp##X##_input.dev_attr.attr, \ 935 &sensor_dev_attr_temp##X##_max.dev_attr.attr, \ 936 &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr, \ 937 &sensor_dev_attr_temp##X##_alarm.dev_attr.attr, \ 938 &sensor_dev_attr_temp##X##_beep.dev_attr.attr 939 940 static struct attribute *w83781d_attributes[] = { 941 IN_UNIT_ATTRS(0), 942 IN_UNIT_ATTRS(2), 943 IN_UNIT_ATTRS(3), 944 IN_UNIT_ATTRS(4), 945 IN_UNIT_ATTRS(5), 946 IN_UNIT_ATTRS(6), 947 FAN_UNIT_ATTRS(1), 948 FAN_UNIT_ATTRS(2), 949 FAN_UNIT_ATTRS(3), 950 TEMP_UNIT_ATTRS(1), 951 TEMP_UNIT_ATTRS(2), 952 &dev_attr_cpu0_vid.attr, 953 &dev_attr_vrm.attr, 954 &dev_attr_alarms.attr, 955 &dev_attr_beep_mask.attr, 956 &sensor_dev_attr_beep_enable.dev_attr.attr, 957 NULL 958 }; 959 static const struct attribute_group w83781d_group = { 960 .attrs = w83781d_attributes, 961 }; 962 963 static struct attribute *w83781d_attributes_in1[] = { 964 IN_UNIT_ATTRS(1), 965 NULL 966 }; 967 static const struct attribute_group w83781d_group_in1 = { 968 .attrs = w83781d_attributes_in1, 969 }; 970 971 static struct attribute *w83781d_attributes_in78[] = { 972 IN_UNIT_ATTRS(7), 973 IN_UNIT_ATTRS(8), 974 NULL 975 }; 976 static const struct attribute_group w83781d_group_in78 = { 977 .attrs = w83781d_attributes_in78, 978 }; 979 980 static struct attribute *w83781d_attributes_temp3[] = { 981 TEMP_UNIT_ATTRS(3), 982 NULL 983 }; 984 static const struct attribute_group w83781d_group_temp3 = { 985 .attrs = w83781d_attributes_temp3, 986 }; 987 988 static struct attribute *w83781d_attributes_pwm12[] = { 989 &sensor_dev_attr_pwm1.dev_attr.attr, 990 &sensor_dev_attr_pwm2.dev_attr.attr, 991 &dev_attr_pwm2_enable.attr, 992 NULL 993 }; 994 static const struct attribute_group w83781d_group_pwm12 = { 995 .attrs = w83781d_attributes_pwm12, 996 }; 997 998 static struct attribute *w83781d_attributes_pwm34[] = { 999 &sensor_dev_attr_pwm3.dev_attr.attr, 1000 &sensor_dev_attr_pwm4.dev_attr.attr, 1001 NULL 1002 }; 1003 static const struct attribute_group w83781d_group_pwm34 = { 1004 .attrs = w83781d_attributes_pwm34, 1005 }; 1006 1007 static struct attribute *w83781d_attributes_other[] = { 1008 &sensor_dev_attr_temp1_type.dev_attr.attr, 1009 &sensor_dev_attr_temp2_type.dev_attr.attr, 1010 &sensor_dev_attr_temp3_type.dev_attr.attr, 1011 NULL 1012 }; 1013 static const struct attribute_group w83781d_group_other = { 1014 .attrs = w83781d_attributes_other, 1015 }; 1016 1017 /* No clean up is done on error, it's up to the caller */ 1018 static int 1019 w83781d_create_files(struct device *dev, int kind, int is_isa) 1020 { 1021 int err; 1022 1023 err = sysfs_create_group(&dev->kobj, &w83781d_group); 1024 if (err) 1025 return err; 1026 1027 if (kind != w83783s) { 1028 err = sysfs_create_group(&dev->kobj, &w83781d_group_in1); 1029 if (err) 1030 return err; 1031 } 1032 if (kind != as99127f && kind != w83781d && kind != w83783s) { 1033 err = sysfs_create_group(&dev->kobj, &w83781d_group_in78); 1034 if (err) 1035 return err; 1036 } 1037 if (kind != w83783s) { 1038 err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3); 1039 if (err) 1040 return err; 1041 1042 if (kind != w83781d) { 1043 err = sysfs_chmod_file(&dev->kobj, 1044 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1045 S_IRUGO | S_IWUSR); 1046 if (err) 1047 return err; 1048 } 1049 } 1050 1051 if (kind != w83781d && kind != as99127f) { 1052 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12); 1053 if (err) 1054 return err; 1055 } 1056 if (kind == w83782d && !is_isa) { 1057 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34); 1058 if (err) 1059 return err; 1060 } 1061 1062 if (kind != as99127f && kind != w83781d) { 1063 err = device_create_file(dev, 1064 &sensor_dev_attr_temp1_type.dev_attr); 1065 if (err) 1066 return err; 1067 err = device_create_file(dev, 1068 &sensor_dev_attr_temp2_type.dev_attr); 1069 if (err) 1070 return err; 1071 if (kind != w83783s) { 1072 err = device_create_file(dev, 1073 &sensor_dev_attr_temp3_type.dev_attr); 1074 if (err) 1075 return err; 1076 } 1077 } 1078 1079 return 0; 1080 } 1081 1082 /* Return 0 if detection is successful, -ENODEV otherwise */ 1083 static int 1084 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info) 1085 { 1086 int val1, val2; 1087 struct w83781d_data *isa = w83781d_data_if_isa(); 1088 struct i2c_adapter *adapter = client->adapter; 1089 int address = client->addr; 1090 const char *client_name; 1091 enum vendor { winbond, asus } vendid; 1092 1093 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1094 return -ENODEV; 1095 1096 /* 1097 * We block updates of the ISA device to minimize the risk of 1098 * concurrent access to the same W83781D chip through different 1099 * interfaces. 1100 */ 1101 if (isa) 1102 mutex_lock(&isa->update_lock); 1103 1104 if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) { 1105 dev_dbg(&adapter->dev, 1106 "Detection of w83781d chip failed at step 3\n"); 1107 goto err_nodev; 1108 } 1109 1110 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK); 1111 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); 1112 /* Check for Winbond or Asus ID if in bank 0 */ 1113 if (!(val1 & 0x07) && 1114 ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) || 1115 ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) { 1116 dev_dbg(&adapter->dev, 1117 "Detection of w83781d chip failed at step 4\n"); 1118 goto err_nodev; 1119 } 1120 /* 1121 * If Winbond SMBus, check address at 0x48. 1122 * Asus doesn't support, except for as99127f rev.2 1123 */ 1124 if ((!(val1 & 0x80) && val2 == 0xa3) || 1125 ((val1 & 0x80) && val2 == 0x5c)) { 1126 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR) 1127 != address) { 1128 dev_dbg(&adapter->dev, 1129 "Detection of w83781d chip failed at step 5\n"); 1130 goto err_nodev; 1131 } 1132 } 1133 1134 /* Put it now into bank 0 and Vendor ID High Byte */ 1135 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1136 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK) 1137 & 0x78) | 0x80); 1138 1139 /* Get the vendor ID */ 1140 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); 1141 if (val2 == 0x5c) 1142 vendid = winbond; 1143 else if (val2 == 0x12) 1144 vendid = asus; 1145 else { 1146 dev_dbg(&adapter->dev, 1147 "w83781d chip vendor is neither Winbond nor Asus\n"); 1148 goto err_nodev; 1149 } 1150 1151 /* Determine the chip type. */ 1152 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID); 1153 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond) 1154 client_name = "w83781d"; 1155 else if (val1 == 0x30 && vendid == winbond) 1156 client_name = "w83782d"; 1157 else if (val1 == 0x40 && vendid == winbond && address == 0x2d) 1158 client_name = "w83783s"; 1159 else if (val1 == 0x31) 1160 client_name = "as99127f"; 1161 else 1162 goto err_nodev; 1163 1164 if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) { 1165 dev_dbg(&adapter->dev, 1166 "Device at 0x%02x appears to be the same as ISA device\n", 1167 address); 1168 goto err_nodev; 1169 } 1170 1171 if (isa) 1172 mutex_unlock(&isa->update_lock); 1173 1174 strlcpy(info->type, client_name, I2C_NAME_SIZE); 1175 1176 return 0; 1177 1178 err_nodev: 1179 if (isa) 1180 mutex_unlock(&isa->update_lock); 1181 return -ENODEV; 1182 } 1183 1184 static void w83781d_remove_files(struct device *dev) 1185 { 1186 sysfs_remove_group(&dev->kobj, &w83781d_group); 1187 sysfs_remove_group(&dev->kobj, &w83781d_group_in1); 1188 sysfs_remove_group(&dev->kobj, &w83781d_group_in78); 1189 sysfs_remove_group(&dev->kobj, &w83781d_group_temp3); 1190 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12); 1191 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34); 1192 sysfs_remove_group(&dev->kobj, &w83781d_group_other); 1193 } 1194 1195 static int 1196 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id) 1197 { 1198 struct device *dev = &client->dev; 1199 struct w83781d_data *data; 1200 int err; 1201 1202 data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL); 1203 if (!data) 1204 return -ENOMEM; 1205 1206 i2c_set_clientdata(client, data); 1207 mutex_init(&data->lock); 1208 mutex_init(&data->update_lock); 1209 1210 data->type = id->driver_data; 1211 data->client = client; 1212 1213 /* attach secondary i2c lm75-like clients */ 1214 err = w83781d_detect_subclients(client); 1215 if (err) 1216 return err; 1217 1218 /* Initialize the chip */ 1219 w83781d_init_device(dev); 1220 1221 /* Register sysfs hooks */ 1222 err = w83781d_create_files(dev, data->type, 0); 1223 if (err) 1224 goto exit_remove_files; 1225 1226 data->hwmon_dev = hwmon_device_register(dev); 1227 if (IS_ERR(data->hwmon_dev)) { 1228 err = PTR_ERR(data->hwmon_dev); 1229 goto exit_remove_files; 1230 } 1231 1232 return 0; 1233 1234 exit_remove_files: 1235 w83781d_remove_files(dev); 1236 i2c_unregister_device(data->lm75[0]); 1237 i2c_unregister_device(data->lm75[1]); 1238 return err; 1239 } 1240 1241 static int 1242 w83781d_remove(struct i2c_client *client) 1243 { 1244 struct w83781d_data *data = i2c_get_clientdata(client); 1245 struct device *dev = &client->dev; 1246 1247 hwmon_device_unregister(data->hwmon_dev); 1248 w83781d_remove_files(dev); 1249 1250 i2c_unregister_device(data->lm75[0]); 1251 i2c_unregister_device(data->lm75[1]); 1252 1253 return 0; 1254 } 1255 1256 static int 1257 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg) 1258 { 1259 struct i2c_client *client = data->client; 1260 int res, bank; 1261 struct i2c_client *cl; 1262 1263 bank = (reg >> 8) & 0x0f; 1264 if (bank > 2) 1265 /* switch banks */ 1266 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1267 bank); 1268 if (bank == 0 || bank > 2) { 1269 res = i2c_smbus_read_byte_data(client, reg & 0xff); 1270 } else { 1271 /* switch to subclient */ 1272 cl = data->lm75[bank - 1]; 1273 /* convert from ISA to LM75 I2C addresses */ 1274 switch (reg & 0xff) { 1275 case 0x50: /* TEMP */ 1276 res = i2c_smbus_read_word_swapped(cl, 0); 1277 break; 1278 case 0x52: /* CONFIG */ 1279 res = i2c_smbus_read_byte_data(cl, 1); 1280 break; 1281 case 0x53: /* HYST */ 1282 res = i2c_smbus_read_word_swapped(cl, 2); 1283 break; 1284 case 0x55: /* OVER */ 1285 default: 1286 res = i2c_smbus_read_word_swapped(cl, 3); 1287 break; 1288 } 1289 } 1290 if (bank > 2) 1291 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1292 1293 return res; 1294 } 1295 1296 static int 1297 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value) 1298 { 1299 struct i2c_client *client = data->client; 1300 int bank; 1301 struct i2c_client *cl; 1302 1303 bank = (reg >> 8) & 0x0f; 1304 if (bank > 2) 1305 /* switch banks */ 1306 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1307 bank); 1308 if (bank == 0 || bank > 2) { 1309 i2c_smbus_write_byte_data(client, reg & 0xff, 1310 value & 0xff); 1311 } else { 1312 /* switch to subclient */ 1313 cl = data->lm75[bank - 1]; 1314 /* convert from ISA to LM75 I2C addresses */ 1315 switch (reg & 0xff) { 1316 case 0x52: /* CONFIG */ 1317 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 1318 break; 1319 case 0x53: /* HYST */ 1320 i2c_smbus_write_word_swapped(cl, 2, value); 1321 break; 1322 case 0x55: /* OVER */ 1323 i2c_smbus_write_word_swapped(cl, 3, value); 1324 break; 1325 } 1326 } 1327 if (bank > 2) 1328 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1329 1330 return 0; 1331 } 1332 1333 static void 1334 w83781d_init_device(struct device *dev) 1335 { 1336 struct w83781d_data *data = dev_get_drvdata(dev); 1337 int i, p; 1338 int type = data->type; 1339 u8 tmp; 1340 1341 if (reset && type != as99127f) { /* 1342 * this resets registers we don't have 1343 * documentation for on the as99127f 1344 */ 1345 /* 1346 * Resetting the chip has been the default for a long time, 1347 * but it causes the BIOS initializations (fan clock dividers, 1348 * thermal sensor types...) to be lost, so it is now optional. 1349 * It might even go away if nobody reports it as being useful, 1350 * as I see very little reason why this would be needed at 1351 * all. 1352 */ 1353 dev_info(dev, 1354 "If reset=1 solved a problem you were having, please report!\n"); 1355 1356 /* save these registers */ 1357 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1358 p = w83781d_read_value(data, W83781D_REG_PWMCLK12); 1359 /* 1360 * Reset all except Watchdog values and last conversion values 1361 * This sets fan-divs to 2, among others 1362 */ 1363 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80); 1364 /* 1365 * Restore the registers and disable power-on abnormal beep. 1366 * This saves FAN 1/2/3 input/output values set by BIOS. 1367 */ 1368 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1369 w83781d_write_value(data, W83781D_REG_PWMCLK12, p); 1370 /* 1371 * Disable master beep-enable (reset turns it on). 1372 * Individual beep_mask should be reset to off but for some 1373 * reason disabling this bit helps some people not get beeped 1374 */ 1375 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0); 1376 } 1377 1378 /* 1379 * Disable power-on abnormal beep, as advised by the datasheet. 1380 * Already done if reset=1. 1381 */ 1382 if (init && !reset && type != as99127f) { 1383 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1384 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1385 } 1386 1387 data->vrm = vid_which_vrm(); 1388 1389 if ((type != w83781d) && (type != as99127f)) { 1390 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 1391 for (i = 1; i <= 3; i++) { 1392 if (!(tmp & BIT_SCFG1[i - 1])) { 1393 data->sens[i - 1] = 4; 1394 } else { 1395 if (w83781d_read_value 1396 (data, 1397 W83781D_REG_SCFG2) & BIT_SCFG2[i - 1]) 1398 data->sens[i - 1] = 1; 1399 else 1400 data->sens[i - 1] = 2; 1401 } 1402 if (type == w83783s && i == 2) 1403 break; 1404 } 1405 } 1406 1407 if (init && type != as99127f) { 1408 /* Enable temp2 */ 1409 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG); 1410 if (tmp & 0x01) { 1411 dev_warn(dev, 1412 "Enabling temp2, readings might not make sense\n"); 1413 w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG, 1414 tmp & 0xfe); 1415 } 1416 1417 /* Enable temp3 */ 1418 if (type != w83783s) { 1419 tmp = w83781d_read_value(data, 1420 W83781D_REG_TEMP3_CONFIG); 1421 if (tmp & 0x01) { 1422 dev_warn(dev, 1423 "Enabling temp3, readings might not make sense\n"); 1424 w83781d_write_value(data, 1425 W83781D_REG_TEMP3_CONFIG, tmp & 0xfe); 1426 } 1427 } 1428 } 1429 1430 /* Start monitoring */ 1431 w83781d_write_value(data, W83781D_REG_CONFIG, 1432 (w83781d_read_value(data, 1433 W83781D_REG_CONFIG) & 0xf7) 1434 | 0x01); 1435 1436 /* A few vars need to be filled upon startup */ 1437 for (i = 0; i < 3; i++) { 1438 data->fan_min[i] = w83781d_read_value(data, 1439 W83781D_REG_FAN_MIN(i)); 1440 } 1441 1442 mutex_init(&data->update_lock); 1443 } 1444 1445 static struct w83781d_data *w83781d_update_device(struct device *dev) 1446 { 1447 struct w83781d_data *data = dev_get_drvdata(dev); 1448 struct i2c_client *client = data->client; 1449 int i; 1450 1451 mutex_lock(&data->update_lock); 1452 1453 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1454 || !data->valid) { 1455 dev_dbg(dev, "Starting device update\n"); 1456 1457 for (i = 0; i <= 8; i++) { 1458 if (data->type == w83783s && i == 1) 1459 continue; /* 783S has no in1 */ 1460 data->in[i] = 1461 w83781d_read_value(data, W83781D_REG_IN(i)); 1462 data->in_min[i] = 1463 w83781d_read_value(data, W83781D_REG_IN_MIN(i)); 1464 data->in_max[i] = 1465 w83781d_read_value(data, W83781D_REG_IN_MAX(i)); 1466 if ((data->type != w83782d) && (i == 6)) 1467 break; 1468 } 1469 for (i = 0; i < 3; i++) { 1470 data->fan[i] = 1471 w83781d_read_value(data, W83781D_REG_FAN(i)); 1472 data->fan_min[i] = 1473 w83781d_read_value(data, W83781D_REG_FAN_MIN(i)); 1474 } 1475 if (data->type != w83781d && data->type != as99127f) { 1476 for (i = 0; i < 4; i++) { 1477 data->pwm[i] = 1478 w83781d_read_value(data, 1479 W83781D_REG_PWM[i]); 1480 /* Only W83782D on SMBus has PWM3 and PWM4 */ 1481 if ((data->type != w83782d || !client) 1482 && i == 1) 1483 break; 1484 } 1485 /* Only PWM2 can be disabled */ 1486 data->pwm2_enable = (w83781d_read_value(data, 1487 W83781D_REG_PWMCLK12) & 0x08) >> 3; 1488 } 1489 1490 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1)); 1491 data->temp_max = 1492 w83781d_read_value(data, W83781D_REG_TEMP_OVER(1)); 1493 data->temp_max_hyst = 1494 w83781d_read_value(data, W83781D_REG_TEMP_HYST(1)); 1495 data->temp_add[0] = 1496 w83781d_read_value(data, W83781D_REG_TEMP(2)); 1497 data->temp_max_add[0] = 1498 w83781d_read_value(data, W83781D_REG_TEMP_OVER(2)); 1499 data->temp_max_hyst_add[0] = 1500 w83781d_read_value(data, W83781D_REG_TEMP_HYST(2)); 1501 if (data->type != w83783s) { 1502 data->temp_add[1] = 1503 w83781d_read_value(data, W83781D_REG_TEMP(3)); 1504 data->temp_max_add[1] = 1505 w83781d_read_value(data, 1506 W83781D_REG_TEMP_OVER(3)); 1507 data->temp_max_hyst_add[1] = 1508 w83781d_read_value(data, 1509 W83781D_REG_TEMP_HYST(3)); 1510 } 1511 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV); 1512 data->vid = i & 0x0f; 1513 data->vid |= (w83781d_read_value(data, 1514 W83781D_REG_CHIPID) & 0x01) << 4; 1515 data->fan_div[0] = (i >> 4) & 0x03; 1516 data->fan_div[1] = (i >> 6) & 0x03; 1517 data->fan_div[2] = (w83781d_read_value(data, 1518 W83781D_REG_PIN) >> 6) & 0x03; 1519 if ((data->type != w83781d) && (data->type != as99127f)) { 1520 i = w83781d_read_value(data, W83781D_REG_VBAT); 1521 data->fan_div[0] |= (i >> 3) & 0x04; 1522 data->fan_div[1] |= (i >> 4) & 0x04; 1523 data->fan_div[2] |= (i >> 5) & 0x04; 1524 } 1525 if (data->type == w83782d) { 1526 data->alarms = w83781d_read_value(data, 1527 W83782D_REG_ALARM1) 1528 | (w83781d_read_value(data, 1529 W83782D_REG_ALARM2) << 8) 1530 | (w83781d_read_value(data, 1531 W83782D_REG_ALARM3) << 16); 1532 } else if (data->type == w83783s) { 1533 data->alarms = w83781d_read_value(data, 1534 W83782D_REG_ALARM1) 1535 | (w83781d_read_value(data, 1536 W83782D_REG_ALARM2) << 8); 1537 } else { 1538 /* 1539 * No real-time status registers, fall back to 1540 * interrupt status registers 1541 */ 1542 data->alarms = w83781d_read_value(data, 1543 W83781D_REG_ALARM1) 1544 | (w83781d_read_value(data, 1545 W83781D_REG_ALARM2) << 8); 1546 } 1547 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); 1548 data->beep_mask = (i << 8) + 1549 w83781d_read_value(data, W83781D_REG_BEEP_INTS1); 1550 if ((data->type != w83781d) && (data->type != as99127f)) { 1551 data->beep_mask |= 1552 w83781d_read_value(data, 1553 W83781D_REG_BEEP_INTS3) << 16; 1554 } 1555 data->last_updated = jiffies; 1556 data->valid = 1; 1557 } 1558 1559 mutex_unlock(&data->update_lock); 1560 1561 return data; 1562 } 1563 1564 static const struct i2c_device_id w83781d_ids[] = { 1565 { "w83781d", w83781d, }, 1566 { "w83782d", w83782d, }, 1567 { "w83783s", w83783s, }, 1568 { "as99127f", as99127f }, 1569 { /* LIST END */ } 1570 }; 1571 MODULE_DEVICE_TABLE(i2c, w83781d_ids); 1572 1573 static struct i2c_driver w83781d_driver = { 1574 .class = I2C_CLASS_HWMON, 1575 .driver = { 1576 .name = "w83781d", 1577 }, 1578 .probe = w83781d_probe, 1579 .remove = w83781d_remove, 1580 .id_table = w83781d_ids, 1581 .detect = w83781d_detect, 1582 .address_list = normal_i2c, 1583 }; 1584 1585 /* 1586 * ISA related code 1587 */ 1588 #ifdef CONFIG_ISA 1589 1590 /* ISA device, if found */ 1591 static struct platform_device *pdev; 1592 1593 static unsigned short isa_address = 0x290; 1594 1595 /* 1596 * I2C devices get this name attribute automatically, but for ISA devices 1597 * we must create it by ourselves. 1598 */ 1599 static ssize_t 1600 name_show(struct device *dev, struct device_attribute *devattr, char *buf) 1601 { 1602 struct w83781d_data *data = dev_get_drvdata(dev); 1603 return sprintf(buf, "%s\n", data->name); 1604 } 1605 static DEVICE_ATTR_RO(name); 1606 1607 static struct w83781d_data *w83781d_data_if_isa(void) 1608 { 1609 return pdev ? platform_get_drvdata(pdev) : NULL; 1610 } 1611 1612 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ 1613 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) 1614 { 1615 struct w83781d_data *isa; 1616 int i; 1617 1618 if (!pdev) /* No ISA chip */ 1619 return 0; 1620 1621 isa = platform_get_drvdata(pdev); 1622 1623 if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr) 1624 return 0; /* Address doesn't match */ 1625 if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid) 1626 return 0; /* Chip type doesn't match */ 1627 1628 /* 1629 * We compare all the limit registers, the config register and the 1630 * interrupt mask registers 1631 */ 1632 for (i = 0x2b; i <= 0x3d; i++) { 1633 if (w83781d_read_value(isa, i) != 1634 i2c_smbus_read_byte_data(client, i)) 1635 return 0; 1636 } 1637 if (w83781d_read_value(isa, W83781D_REG_CONFIG) != 1638 i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG)) 1639 return 0; 1640 for (i = 0x43; i <= 0x46; i++) { 1641 if (w83781d_read_value(isa, i) != 1642 i2c_smbus_read_byte_data(client, i)) 1643 return 0; 1644 } 1645 1646 return 1; 1647 } 1648 1649 static int 1650 w83781d_read_value_isa(struct w83781d_data *data, u16 reg) 1651 { 1652 int word_sized, res; 1653 1654 word_sized = (((reg & 0xff00) == 0x100) 1655 || ((reg & 0xff00) == 0x200)) 1656 && (((reg & 0x00ff) == 0x50) 1657 || ((reg & 0x00ff) == 0x53) 1658 || ((reg & 0x00ff) == 0x55)); 1659 if (reg & 0xff00) { 1660 outb_p(W83781D_REG_BANK, 1661 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1662 outb_p(reg >> 8, 1663 data->isa_addr + W83781D_DATA_REG_OFFSET); 1664 } 1665 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); 1666 res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET); 1667 if (word_sized) { 1668 outb_p((reg & 0xff) + 1, 1669 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1670 res = 1671 (res << 8) + inb_p(data->isa_addr + 1672 W83781D_DATA_REG_OFFSET); 1673 } 1674 if (reg & 0xff00) { 1675 outb_p(W83781D_REG_BANK, 1676 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1677 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); 1678 } 1679 return res; 1680 } 1681 1682 static void 1683 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value) 1684 { 1685 int word_sized; 1686 1687 word_sized = (((reg & 0xff00) == 0x100) 1688 || ((reg & 0xff00) == 0x200)) 1689 && (((reg & 0x00ff) == 0x53) 1690 || ((reg & 0x00ff) == 0x55)); 1691 if (reg & 0xff00) { 1692 outb_p(W83781D_REG_BANK, 1693 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1694 outb_p(reg >> 8, 1695 data->isa_addr + W83781D_DATA_REG_OFFSET); 1696 } 1697 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); 1698 if (word_sized) { 1699 outb_p(value >> 8, 1700 data->isa_addr + W83781D_DATA_REG_OFFSET); 1701 outb_p((reg & 0xff) + 1, 1702 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1703 } 1704 outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET); 1705 if (reg & 0xff00) { 1706 outb_p(W83781D_REG_BANK, 1707 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1708 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); 1709 } 1710 } 1711 1712 /* 1713 * The SMBus locks itself, usually, but nothing may access the Winbond between 1714 * bank switches. ISA access must always be locked explicitly! 1715 * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, 1716 * would slow down the W83781D access and should not be necessary. 1717 * There are some ugly typecasts here, but the good news is - they should 1718 * nowhere else be necessary! 1719 */ 1720 static int 1721 w83781d_read_value(struct w83781d_data *data, u16 reg) 1722 { 1723 struct i2c_client *client = data->client; 1724 int res; 1725 1726 mutex_lock(&data->lock); 1727 if (client) 1728 res = w83781d_read_value_i2c(data, reg); 1729 else 1730 res = w83781d_read_value_isa(data, reg); 1731 mutex_unlock(&data->lock); 1732 return res; 1733 } 1734 1735 static int 1736 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) 1737 { 1738 struct i2c_client *client = data->client; 1739 1740 mutex_lock(&data->lock); 1741 if (client) 1742 w83781d_write_value_i2c(data, reg, value); 1743 else 1744 w83781d_write_value_isa(data, reg, value); 1745 mutex_unlock(&data->lock); 1746 return 0; 1747 } 1748 1749 static int 1750 w83781d_isa_probe(struct platform_device *pdev) 1751 { 1752 int err, reg; 1753 struct w83781d_data *data; 1754 struct resource *res; 1755 1756 /* Reserve the ISA region */ 1757 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1758 if (!devm_request_region(&pdev->dev, 1759 res->start + W83781D_ADDR_REG_OFFSET, 2, 1760 "w83781d")) 1761 return -EBUSY; 1762 1763 data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data), 1764 GFP_KERNEL); 1765 if (!data) 1766 return -ENOMEM; 1767 1768 mutex_init(&data->lock); 1769 data->isa_addr = res->start; 1770 platform_set_drvdata(pdev, data); 1771 1772 reg = w83781d_read_value(data, W83781D_REG_WCHIPID); 1773 switch (reg) { 1774 case 0x30: 1775 data->type = w83782d; 1776 data->name = "w83782d"; 1777 break; 1778 default: 1779 data->type = w83781d; 1780 data->name = "w83781d"; 1781 } 1782 1783 /* Initialize the W83781D chip */ 1784 w83781d_init_device(&pdev->dev); 1785 1786 /* Register sysfs hooks */ 1787 err = w83781d_create_files(&pdev->dev, data->type, 1); 1788 if (err) 1789 goto exit_remove_files; 1790 1791 err = device_create_file(&pdev->dev, &dev_attr_name); 1792 if (err) 1793 goto exit_remove_files; 1794 1795 data->hwmon_dev = hwmon_device_register(&pdev->dev); 1796 if (IS_ERR(data->hwmon_dev)) { 1797 err = PTR_ERR(data->hwmon_dev); 1798 goto exit_remove_files; 1799 } 1800 1801 return 0; 1802 1803 exit_remove_files: 1804 w83781d_remove_files(&pdev->dev); 1805 device_remove_file(&pdev->dev, &dev_attr_name); 1806 return err; 1807 } 1808 1809 static int 1810 w83781d_isa_remove(struct platform_device *pdev) 1811 { 1812 struct w83781d_data *data = platform_get_drvdata(pdev); 1813 1814 hwmon_device_unregister(data->hwmon_dev); 1815 w83781d_remove_files(&pdev->dev); 1816 device_remove_file(&pdev->dev, &dev_attr_name); 1817 1818 return 0; 1819 } 1820 1821 static struct platform_driver w83781d_isa_driver = { 1822 .driver = { 1823 .name = "w83781d", 1824 }, 1825 .probe = w83781d_isa_probe, 1826 .remove = w83781d_isa_remove, 1827 }; 1828 1829 /* return 1 if a supported chip is found, 0 otherwise */ 1830 static int __init 1831 w83781d_isa_found(unsigned short address) 1832 { 1833 int val, save, found = 0; 1834 int port; 1835 1836 /* 1837 * Some boards declare base+0 to base+7 as a PNP device, some base+4 1838 * to base+7 and some base+5 to base+6. So we better request each port 1839 * individually for the probing phase. 1840 */ 1841 for (port = address; port < address + W83781D_EXTENT; port++) { 1842 if (!request_region(port, 1, "w83781d")) { 1843 pr_debug("Failed to request port 0x%x\n", port); 1844 goto release; 1845 } 1846 } 1847 1848 #define REALLY_SLOW_IO 1849 /* 1850 * We need the timeouts for at least some W83781D-like 1851 * chips. But only if we read 'undefined' registers. 1852 */ 1853 val = inb_p(address + 1); 1854 if (inb_p(address + 2) != val 1855 || inb_p(address + 3) != val 1856 || inb_p(address + 7) != val) { 1857 pr_debug("Detection failed at step %d\n", 1); 1858 goto release; 1859 } 1860 #undef REALLY_SLOW_IO 1861 1862 /* 1863 * We should be able to change the 7 LSB of the address port. The 1864 * MSB (busy flag) should be clear initially, set after the write. 1865 */ 1866 save = inb_p(address + W83781D_ADDR_REG_OFFSET); 1867 if (save & 0x80) { 1868 pr_debug("Detection failed at step %d\n", 2); 1869 goto release; 1870 } 1871 val = ~save & 0x7f; 1872 outb_p(val, address + W83781D_ADDR_REG_OFFSET); 1873 if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) { 1874 outb_p(save, address + W83781D_ADDR_REG_OFFSET); 1875 pr_debug("Detection failed at step %d\n", 3); 1876 goto release; 1877 } 1878 1879 /* We found a device, now see if it could be a W83781D */ 1880 outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET); 1881 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1882 if (val & 0x80) { 1883 pr_debug("Detection failed at step %d\n", 4); 1884 goto release; 1885 } 1886 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1887 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1888 outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET); 1889 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1890 if ((!(save & 0x80) && (val != 0xa3)) 1891 || ((save & 0x80) && (val != 0x5c))) { 1892 pr_debug("Detection failed at step %d\n", 5); 1893 goto release; 1894 } 1895 outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET); 1896 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1897 if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */ 1898 pr_debug("Detection failed at step %d\n", 6); 1899 goto release; 1900 } 1901 1902 /* The busy flag should be clear again */ 1903 if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) { 1904 pr_debug("Detection failed at step %d\n", 7); 1905 goto release; 1906 } 1907 1908 /* Determine the chip type */ 1909 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1910 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1911 outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET); 1912 outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET); 1913 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1914 if ((val & 0xfe) == 0x10 /* W83781D */ 1915 || val == 0x30) /* W83782D */ 1916 found = 1; 1917 1918 if (found) 1919 pr_info("Found a %s chip at %#x\n", 1920 val == 0x30 ? "W83782D" : "W83781D", (int)address); 1921 1922 release: 1923 for (port--; port >= address; port--) 1924 release_region(port, 1); 1925 return found; 1926 } 1927 1928 static int __init 1929 w83781d_isa_device_add(unsigned short address) 1930 { 1931 struct resource res = { 1932 .start = address, 1933 .end = address + W83781D_EXTENT - 1, 1934 .name = "w83781d", 1935 .flags = IORESOURCE_IO, 1936 }; 1937 int err; 1938 1939 pdev = platform_device_alloc("w83781d", address); 1940 if (!pdev) { 1941 err = -ENOMEM; 1942 pr_err("Device allocation failed\n"); 1943 goto exit; 1944 } 1945 1946 err = platform_device_add_resources(pdev, &res, 1); 1947 if (err) { 1948 pr_err("Device resource addition failed (%d)\n", err); 1949 goto exit_device_put; 1950 } 1951 1952 err = platform_device_add(pdev); 1953 if (err) { 1954 pr_err("Device addition failed (%d)\n", err); 1955 goto exit_device_put; 1956 } 1957 1958 return 0; 1959 1960 exit_device_put: 1961 platform_device_put(pdev); 1962 exit: 1963 pdev = NULL; 1964 return err; 1965 } 1966 1967 static int __init 1968 w83781d_isa_register(void) 1969 { 1970 int res; 1971 1972 if (w83781d_isa_found(isa_address)) { 1973 res = platform_driver_register(&w83781d_isa_driver); 1974 if (res) 1975 goto exit; 1976 1977 /* Sets global pdev as a side effect */ 1978 res = w83781d_isa_device_add(isa_address); 1979 if (res) 1980 goto exit_unreg_isa_driver; 1981 } 1982 1983 return 0; 1984 1985 exit_unreg_isa_driver: 1986 platform_driver_unregister(&w83781d_isa_driver); 1987 exit: 1988 return res; 1989 } 1990 1991 static void 1992 w83781d_isa_unregister(void) 1993 { 1994 if (pdev) { 1995 platform_device_unregister(pdev); 1996 platform_driver_unregister(&w83781d_isa_driver); 1997 } 1998 } 1999 #else /* !CONFIG_ISA */ 2000 2001 static struct w83781d_data *w83781d_data_if_isa(void) 2002 { 2003 return NULL; 2004 } 2005 2006 static int 2007 w83781d_alias_detect(struct i2c_client *client, u8 chipid) 2008 { 2009 return 0; 2010 } 2011 2012 static int 2013 w83781d_read_value(struct w83781d_data *data, u16 reg) 2014 { 2015 int res; 2016 2017 mutex_lock(&data->lock); 2018 res = w83781d_read_value_i2c(data, reg); 2019 mutex_unlock(&data->lock); 2020 2021 return res; 2022 } 2023 2024 static int 2025 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) 2026 { 2027 mutex_lock(&data->lock); 2028 w83781d_write_value_i2c(data, reg, value); 2029 mutex_unlock(&data->lock); 2030 2031 return 0; 2032 } 2033 2034 static int __init 2035 w83781d_isa_register(void) 2036 { 2037 return 0; 2038 } 2039 2040 static void 2041 w83781d_isa_unregister(void) 2042 { 2043 } 2044 #endif /* CONFIG_ISA */ 2045 2046 static int __init 2047 sensors_w83781d_init(void) 2048 { 2049 int res; 2050 2051 /* 2052 * We register the ISA device first, so that we can skip the 2053 * registration of an I2C interface to the same device. 2054 */ 2055 res = w83781d_isa_register(); 2056 if (res) 2057 goto exit; 2058 2059 res = i2c_add_driver(&w83781d_driver); 2060 if (res) 2061 goto exit_unreg_isa; 2062 2063 return 0; 2064 2065 exit_unreg_isa: 2066 w83781d_isa_unregister(); 2067 exit: 2068 return res; 2069 } 2070 2071 static void __exit 2072 sensors_w83781d_exit(void) 2073 { 2074 w83781d_isa_unregister(); 2075 i2c_del_driver(&w83781d_driver); 2076 } 2077 2078 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 2079 "Philip Edelbrock <phil@netroedge.com>, " 2080 "and Mark Studebaker <mdsxyz123@yahoo.com>"); 2081 MODULE_DESCRIPTION("W83781D driver"); 2082 MODULE_LICENSE("GPL"); 2083 2084 module_init(sensors_w83781d_init); 2085 module_exit(sensors_w83781d_exit); 2086