1 /* 2 * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, 5 * Philip Edelbrock <phil@netroedge.com>, 6 * and Mark Studebaker <mdsxyz123@yahoo.com> 7 * Copyright (c) 2007 - 2008 Jean Delvare <jdelvare@suse.de> 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 24 /* 25 * Supports following chips: 26 * 27 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 28 * as99127f 7 3 0 3 0x31 0x12c3 yes no 29 * as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no 30 * w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes 31 * w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes 32 * w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no 33 * 34 */ 35 36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 37 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/slab.h> 41 #include <linux/jiffies.h> 42 #include <linux/i2c.h> 43 #include <linux/hwmon.h> 44 #include <linux/hwmon-vid.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/sysfs.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 50 #ifdef CONFIG_ISA 51 #include <linux/platform_device.h> 52 #include <linux/ioport.h> 53 #include <linux/io.h> 54 #endif 55 56 #include "lm75.h" 57 58 /* Addresses to scan */ 59 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 60 0x2e, 0x2f, I2C_CLIENT_END }; 61 62 enum chips { w83781d, w83782d, w83783s, as99127f }; 63 64 /* Insmod parameters */ 65 static unsigned short force_subclients[4]; 66 module_param_array(force_subclients, short, NULL, 0); 67 MODULE_PARM_DESC(force_subclients, 68 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}"); 69 70 static bool reset; 71 module_param(reset, bool, 0); 72 MODULE_PARM_DESC(reset, "Set to one to reset chip on load"); 73 74 static bool init = 1; 75 module_param(init, bool, 0); 76 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization"); 77 78 /* Constants specified below */ 79 80 /* Length of ISA address segment */ 81 #define W83781D_EXTENT 8 82 83 /* Where are the ISA address/data registers relative to the base address */ 84 #define W83781D_ADDR_REG_OFFSET 5 85 #define W83781D_DATA_REG_OFFSET 6 86 87 /* The device registers */ 88 /* in nr from 0 to 8 */ 89 #define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \ 90 (0x554 + (((nr) - 7) * 2))) 91 #define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \ 92 (0x555 + (((nr) - 7) * 2))) 93 #define W83781D_REG_IN(nr) ((nr < 7) ? (0x20 + (nr)) : \ 94 (0x550 + (nr) - 7)) 95 96 /* fan nr from 0 to 2 */ 97 #define W83781D_REG_FAN_MIN(nr) (0x3b + (nr)) 98 #define W83781D_REG_FAN(nr) (0x28 + (nr)) 99 100 #define W83781D_REG_BANK 0x4E 101 #define W83781D_REG_TEMP2_CONFIG 0x152 102 #define W83781D_REG_TEMP3_CONFIG 0x252 103 /* temp nr from 1 to 3 */ 104 #define W83781D_REG_TEMP(nr) ((nr == 3) ? (0x0250) : \ 105 ((nr == 2) ? (0x0150) : \ 106 (0x27))) 107 #define W83781D_REG_TEMP_HYST(nr) ((nr == 3) ? (0x253) : \ 108 ((nr == 2) ? (0x153) : \ 109 (0x3A))) 110 #define W83781D_REG_TEMP_OVER(nr) ((nr == 3) ? (0x255) : \ 111 ((nr == 2) ? (0x155) : \ 112 (0x39))) 113 114 #define W83781D_REG_CONFIG 0x40 115 116 /* Interrupt status (W83781D, AS99127F) */ 117 #define W83781D_REG_ALARM1 0x41 118 #define W83781D_REG_ALARM2 0x42 119 120 /* Real-time status (W83782D, W83783S) */ 121 #define W83782D_REG_ALARM1 0x459 122 #define W83782D_REG_ALARM2 0x45A 123 #define W83782D_REG_ALARM3 0x45B 124 125 #define W83781D_REG_BEEP_CONFIG 0x4D 126 #define W83781D_REG_BEEP_INTS1 0x56 127 #define W83781D_REG_BEEP_INTS2 0x57 128 #define W83781D_REG_BEEP_INTS3 0x453 /* not on W83781D */ 129 130 #define W83781D_REG_VID_FANDIV 0x47 131 132 #define W83781D_REG_CHIPID 0x49 133 #define W83781D_REG_WCHIPID 0x58 134 #define W83781D_REG_CHIPMAN 0x4F 135 #define W83781D_REG_PIN 0x4B 136 137 /* 782D/783S only */ 138 #define W83781D_REG_VBAT 0x5D 139 140 /* PWM 782D (1-4) and 783S (1-2) only */ 141 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F }; 142 #define W83781D_REG_PWMCLK12 0x5C 143 #define W83781D_REG_PWMCLK34 0x45C 144 145 #define W83781D_REG_I2C_ADDR 0x48 146 #define W83781D_REG_I2C_SUBADDR 0x4A 147 148 /* 149 * The following are undocumented in the data sheets however we 150 * received the information in an email from Winbond tech support 151 */ 152 /* Sensor selection - not on 781d */ 153 #define W83781D_REG_SCFG1 0x5D 154 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 }; 155 156 #define W83781D_REG_SCFG2 0x59 157 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 }; 158 159 #define W83781D_DEFAULT_BETA 3435 160 161 /* Conversions */ 162 #define IN_TO_REG(val) clamp_val(((val) + 8) / 16, 0, 255) 163 #define IN_FROM_REG(val) ((val) * 16) 164 165 static inline u8 166 FAN_TO_REG(long rpm, int div) 167 { 168 if (rpm == 0) 169 return 255; 170 rpm = clamp_val(rpm, 1, 1000000); 171 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 172 } 173 174 static inline long 175 FAN_FROM_REG(u8 val, int div) 176 { 177 if (val == 0) 178 return -1; 179 if (val == 255) 180 return 0; 181 return 1350000 / (val * div); 182 } 183 184 #define TEMP_TO_REG(val) clamp_val((val) / 1000, -127, 128) 185 #define TEMP_FROM_REG(val) ((val) * 1000) 186 187 #define BEEP_MASK_FROM_REG(val, type) ((type) == as99127f ? \ 188 (~(val)) & 0x7fff : (val) & 0xff7fff) 189 #define BEEP_MASK_TO_REG(val, type) ((type) == as99127f ? \ 190 (~(val)) & 0x7fff : (val) & 0xff7fff) 191 192 #define DIV_FROM_REG(val) (1 << (val)) 193 194 static inline u8 195 DIV_TO_REG(long val, enum chips type) 196 { 197 int i; 198 val = clamp_val(val, 1, 199 ((type == w83781d || type == as99127f) ? 8 : 128)) >> 1; 200 for (i = 0; i < 7; i++) { 201 if (val == 0) 202 break; 203 val >>= 1; 204 } 205 return i; 206 } 207 208 struct w83781d_data { 209 struct i2c_client *client; 210 struct device *hwmon_dev; 211 struct mutex lock; 212 enum chips type; 213 214 /* For ISA device only */ 215 const char *name; 216 int isa_addr; 217 218 struct mutex update_lock; 219 char valid; /* !=0 if following fields are valid */ 220 unsigned long last_updated; /* In jiffies */ 221 222 struct i2c_client *lm75[2]; /* for secondary I2C addresses */ 223 /* array of 2 pointers to subclients */ 224 225 u8 in[9]; /* Register value - 8 & 9 for 782D only */ 226 u8 in_max[9]; /* Register value - 8 & 9 for 782D only */ 227 u8 in_min[9]; /* Register value - 8 & 9 for 782D only */ 228 u8 fan[3]; /* Register value */ 229 u8 fan_min[3]; /* Register value */ 230 s8 temp; /* Register value */ 231 s8 temp_max; /* Register value */ 232 s8 temp_max_hyst; /* Register value */ 233 u16 temp_add[2]; /* Register value */ 234 u16 temp_max_add[2]; /* Register value */ 235 u16 temp_max_hyst_add[2]; /* Register value */ 236 u8 fan_div[3]; /* Register encoding, shifted right */ 237 u8 vid; /* Register encoding, combined */ 238 u32 alarms; /* Register encoding, combined */ 239 u32 beep_mask; /* Register encoding, combined */ 240 u8 pwm[4]; /* Register value */ 241 u8 pwm2_enable; /* Boolean */ 242 u16 sens[3]; /* 243 * 782D/783S only. 244 * 1 = pentium diode; 2 = 3904 diode; 245 * 4 = thermistor 246 */ 247 u8 vrm; 248 }; 249 250 static struct w83781d_data *w83781d_data_if_isa(void); 251 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid); 252 253 static int w83781d_read_value(struct w83781d_data *data, u16 reg); 254 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value); 255 static struct w83781d_data *w83781d_update_device(struct device *dev); 256 static void w83781d_init_device(struct device *dev); 257 258 /* following are the sysfs callback functions */ 259 #define show_in_reg(reg) \ 260 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 261 char *buf) \ 262 { \ 263 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 264 struct w83781d_data *data = w83781d_update_device(dev); \ 265 return sprintf(buf, "%ld\n", \ 266 (long)IN_FROM_REG(data->reg[attr->index])); \ 267 } 268 show_in_reg(in); 269 show_in_reg(in_min); 270 show_in_reg(in_max); 271 272 #define store_in_reg(REG, reg) \ 273 static ssize_t store_in_##reg(struct device *dev, struct device_attribute \ 274 *da, const char *buf, size_t count) \ 275 { \ 276 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 277 struct w83781d_data *data = dev_get_drvdata(dev); \ 278 int nr = attr->index; \ 279 unsigned long val; \ 280 int err = kstrtoul(buf, 10, &val); \ 281 if (err) \ 282 return err; \ 283 mutex_lock(&data->update_lock); \ 284 data->in_##reg[nr] = IN_TO_REG(val); \ 285 w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \ 286 data->in_##reg[nr]); \ 287 \ 288 mutex_unlock(&data->update_lock); \ 289 return count; \ 290 } 291 store_in_reg(MIN, min); 292 store_in_reg(MAX, max); 293 294 #define sysfs_in_offsets(offset) \ 295 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 296 show_in, NULL, offset); \ 297 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 298 show_in_min, store_in_min, offset); \ 299 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 300 show_in_max, store_in_max, offset) 301 302 sysfs_in_offsets(0); 303 sysfs_in_offsets(1); 304 sysfs_in_offsets(2); 305 sysfs_in_offsets(3); 306 sysfs_in_offsets(4); 307 sysfs_in_offsets(5); 308 sysfs_in_offsets(6); 309 sysfs_in_offsets(7); 310 sysfs_in_offsets(8); 311 312 #define show_fan_reg(reg) \ 313 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 314 char *buf) \ 315 { \ 316 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 317 struct w83781d_data *data = w83781d_update_device(dev); \ 318 return sprintf(buf, "%ld\n", \ 319 FAN_FROM_REG(data->reg[attr->index], \ 320 DIV_FROM_REG(data->fan_div[attr->index]))); \ 321 } 322 show_fan_reg(fan); 323 show_fan_reg(fan_min); 324 325 static ssize_t 326 store_fan_min(struct device *dev, struct device_attribute *da, 327 const char *buf, size_t count) 328 { 329 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 330 struct w83781d_data *data = dev_get_drvdata(dev); 331 int nr = attr->index; 332 unsigned long val; 333 int err; 334 335 err = kstrtoul(buf, 10, &val); 336 if (err) 337 return err; 338 339 mutex_lock(&data->update_lock); 340 data->fan_min[nr] = 341 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 342 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), 343 data->fan_min[nr]); 344 345 mutex_unlock(&data->update_lock); 346 return count; 347 } 348 349 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 350 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR, 351 show_fan_min, store_fan_min, 0); 352 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 353 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR, 354 show_fan_min, store_fan_min, 1); 355 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 356 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR, 357 show_fan_min, store_fan_min, 2); 358 359 #define show_temp_reg(reg) \ 360 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \ 361 char *buf) \ 362 { \ 363 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 364 struct w83781d_data *data = w83781d_update_device(dev); \ 365 int nr = attr->index; \ 366 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 367 return sprintf(buf, "%d\n", \ 368 LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \ 369 } else { /* TEMP1 */ \ 370 return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \ 371 } \ 372 } 373 show_temp_reg(temp); 374 show_temp_reg(temp_max); 375 show_temp_reg(temp_max_hyst); 376 377 #define store_temp_reg(REG, reg) \ 378 static ssize_t store_temp_##reg(struct device *dev, \ 379 struct device_attribute *da, const char *buf, size_t count) \ 380 { \ 381 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \ 382 struct w83781d_data *data = dev_get_drvdata(dev); \ 383 int nr = attr->index; \ 384 long val; \ 385 int err = kstrtol(buf, 10, &val); \ 386 if (err) \ 387 return err; \ 388 mutex_lock(&data->update_lock); \ 389 \ 390 if (nr >= 2) { /* TEMP2 and TEMP3 */ \ 391 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \ 392 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 393 data->temp_##reg##_add[nr-2]); \ 394 } else { /* TEMP1 */ \ 395 data->temp_##reg = TEMP_TO_REG(val); \ 396 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \ 397 data->temp_##reg); \ 398 } \ 399 \ 400 mutex_unlock(&data->update_lock); \ 401 return count; \ 402 } 403 store_temp_reg(OVER, max); 404 store_temp_reg(HYST, max_hyst); 405 406 #define sysfs_temp_offsets(offset) \ 407 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 408 show_temp, NULL, offset); \ 409 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ 410 show_temp_max, store_temp_max, offset); \ 411 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ 412 show_temp_max_hyst, store_temp_max_hyst, offset); 413 414 sysfs_temp_offsets(1); 415 sysfs_temp_offsets(2); 416 sysfs_temp_offsets(3); 417 418 static ssize_t 419 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf) 420 { 421 struct w83781d_data *data = w83781d_update_device(dev); 422 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm)); 423 } 424 425 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL); 426 427 static ssize_t 428 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf) 429 { 430 struct w83781d_data *data = dev_get_drvdata(dev); 431 return sprintf(buf, "%ld\n", (long) data->vrm); 432 } 433 434 static ssize_t 435 store_vrm_reg(struct device *dev, struct device_attribute *attr, 436 const char *buf, size_t count) 437 { 438 struct w83781d_data *data = dev_get_drvdata(dev); 439 unsigned long val; 440 int err; 441 442 err = kstrtoul(buf, 10, &val); 443 if (err) 444 return err; 445 data->vrm = clamp_val(val, 0, 255); 446 447 return count; 448 } 449 450 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg); 451 452 static ssize_t 453 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf) 454 { 455 struct w83781d_data *data = w83781d_update_device(dev); 456 return sprintf(buf, "%u\n", data->alarms); 457 } 458 459 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL); 460 461 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 462 char *buf) 463 { 464 struct w83781d_data *data = w83781d_update_device(dev); 465 int bitnr = to_sensor_dev_attr(attr)->index; 466 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 467 } 468 469 /* The W83781D has a single alarm bit for temp2 and temp3 */ 470 static ssize_t show_temp3_alarm(struct device *dev, 471 struct device_attribute *attr, char *buf) 472 { 473 struct w83781d_data *data = w83781d_update_device(dev); 474 int bitnr = (data->type == w83781d) ? 5 : 13; 475 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 476 } 477 478 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 479 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 480 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 481 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 482 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 483 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 484 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); 485 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16); 486 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17); 487 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); 488 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); 489 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); 490 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); 491 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); 492 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0); 493 494 static ssize_t show_beep_mask(struct device *dev, 495 struct device_attribute *attr, char *buf) 496 { 497 struct w83781d_data *data = w83781d_update_device(dev); 498 return sprintf(buf, "%ld\n", 499 (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type)); 500 } 501 502 static ssize_t 503 store_beep_mask(struct device *dev, struct device_attribute *attr, 504 const char *buf, size_t count) 505 { 506 struct w83781d_data *data = dev_get_drvdata(dev); 507 unsigned long val; 508 int err; 509 510 err = kstrtoul(buf, 10, &val); 511 if (err) 512 return err; 513 514 mutex_lock(&data->update_lock); 515 data->beep_mask &= 0x8000; /* preserve beep enable */ 516 data->beep_mask |= BEEP_MASK_TO_REG(val, data->type); 517 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, 518 data->beep_mask & 0xff); 519 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 520 (data->beep_mask >> 8) & 0xff); 521 if (data->type != w83781d && data->type != as99127f) { 522 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, 523 ((data->beep_mask) >> 16) & 0xff); 524 } 525 mutex_unlock(&data->update_lock); 526 527 return count; 528 } 529 530 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, 531 show_beep_mask, store_beep_mask); 532 533 static ssize_t show_beep(struct device *dev, struct device_attribute *attr, 534 char *buf) 535 { 536 struct w83781d_data *data = w83781d_update_device(dev); 537 int bitnr = to_sensor_dev_attr(attr)->index; 538 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 539 } 540 541 static ssize_t 542 store_beep(struct device *dev, struct device_attribute *attr, 543 const char *buf, size_t count) 544 { 545 struct w83781d_data *data = dev_get_drvdata(dev); 546 int bitnr = to_sensor_dev_attr(attr)->index; 547 u8 reg; 548 unsigned long bit; 549 int err; 550 551 err = kstrtoul(buf, 10, &bit); 552 if (err) 553 return err; 554 555 if (bit & ~1) 556 return -EINVAL; 557 558 mutex_lock(&data->update_lock); 559 if (bit) 560 data->beep_mask |= (1 << bitnr); 561 else 562 data->beep_mask &= ~(1 << bitnr); 563 564 if (bitnr < 8) { 565 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1); 566 if (bit) 567 reg |= (1 << bitnr); 568 else 569 reg &= ~(1 << bitnr); 570 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg); 571 } else if (bitnr < 16) { 572 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); 573 if (bit) 574 reg |= (1 << (bitnr - 8)); 575 else 576 reg &= ~(1 << (bitnr - 8)); 577 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg); 578 } else { 579 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3); 580 if (bit) 581 reg |= (1 << (bitnr - 16)); 582 else 583 reg &= ~(1 << (bitnr - 16)); 584 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg); 585 } 586 mutex_unlock(&data->update_lock); 587 588 return count; 589 } 590 591 /* The W83781D has a single beep bit for temp2 and temp3 */ 592 static ssize_t show_temp3_beep(struct device *dev, 593 struct device_attribute *attr, char *buf) 594 { 595 struct w83781d_data *data = w83781d_update_device(dev); 596 int bitnr = (data->type == w83781d) ? 5 : 13; 597 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); 598 } 599 600 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, 601 show_beep, store_beep, 0); 602 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, 603 show_beep, store_beep, 1); 604 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, 605 show_beep, store_beep, 2); 606 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, 607 show_beep, store_beep, 3); 608 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, 609 show_beep, store_beep, 8); 610 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR, 611 show_beep, store_beep, 9); 612 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR, 613 show_beep, store_beep, 10); 614 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR, 615 show_beep, store_beep, 16); 616 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR, 617 show_beep, store_beep, 17); 618 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, 619 show_beep, store_beep, 6); 620 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, 621 show_beep, store_beep, 7); 622 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR, 623 show_beep, store_beep, 11); 624 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, 625 show_beep, store_beep, 4); 626 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, 627 show_beep, store_beep, 5); 628 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, 629 show_temp3_beep, store_beep, 13); 630 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, 631 show_beep, store_beep, 15); 632 633 static ssize_t 634 show_fan_div(struct device *dev, struct device_attribute *da, char *buf) 635 { 636 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 637 struct w83781d_data *data = w83781d_update_device(dev); 638 return sprintf(buf, "%ld\n", 639 (long) DIV_FROM_REG(data->fan_div[attr->index])); 640 } 641 642 /* 643 * Note: we save and restore the fan minimum here, because its value is 644 * determined in part by the fan divisor. This follows the principle of 645 * least surprise; the user doesn't expect the fan minimum to change just 646 * because the divisor changed. 647 */ 648 static ssize_t 649 store_fan_div(struct device *dev, struct device_attribute *da, 650 const char *buf, size_t count) 651 { 652 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 653 struct w83781d_data *data = dev_get_drvdata(dev); 654 unsigned long min; 655 int nr = attr->index; 656 u8 reg; 657 unsigned long val; 658 int err; 659 660 err = kstrtoul(buf, 10, &val); 661 if (err) 662 return err; 663 664 mutex_lock(&data->update_lock); 665 666 /* Save fan_min */ 667 min = FAN_FROM_REG(data->fan_min[nr], 668 DIV_FROM_REG(data->fan_div[nr])); 669 670 data->fan_div[nr] = DIV_TO_REG(val, data->type); 671 672 reg = (w83781d_read_value(data, nr == 2 ? 673 W83781D_REG_PIN : W83781D_REG_VID_FANDIV) 674 & (nr == 0 ? 0xcf : 0x3f)) 675 | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6)); 676 w83781d_write_value(data, nr == 2 ? 677 W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg); 678 679 /* w83781d and as99127f don't have extended divisor bits */ 680 if (data->type != w83781d && data->type != as99127f) { 681 reg = (w83781d_read_value(data, W83781D_REG_VBAT) 682 & ~(1 << (5 + nr))) 683 | ((data->fan_div[nr] & 0x04) << (3 + nr)); 684 w83781d_write_value(data, W83781D_REG_VBAT, reg); 685 } 686 687 /* Restore fan_min */ 688 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 689 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]); 690 691 mutex_unlock(&data->update_lock); 692 return count; 693 } 694 695 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, 696 show_fan_div, store_fan_div, 0); 697 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, 698 show_fan_div, store_fan_div, 1); 699 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, 700 show_fan_div, store_fan_div, 2); 701 702 static ssize_t 703 show_pwm(struct device *dev, struct device_attribute *da, char *buf) 704 { 705 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 706 struct w83781d_data *data = w83781d_update_device(dev); 707 return sprintf(buf, "%d\n", (int)data->pwm[attr->index]); 708 } 709 710 static ssize_t 711 show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf) 712 { 713 struct w83781d_data *data = w83781d_update_device(dev); 714 return sprintf(buf, "%d\n", (int)data->pwm2_enable); 715 } 716 717 static ssize_t 718 store_pwm(struct device *dev, struct device_attribute *da, const char *buf, 719 size_t count) 720 { 721 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 722 struct w83781d_data *data = dev_get_drvdata(dev); 723 int nr = attr->index; 724 unsigned long val; 725 int err; 726 727 err = kstrtoul(buf, 10, &val); 728 if (err) 729 return err; 730 731 mutex_lock(&data->update_lock); 732 data->pwm[nr] = clamp_val(val, 0, 255); 733 w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]); 734 mutex_unlock(&data->update_lock); 735 return count; 736 } 737 738 static ssize_t 739 store_pwm2_enable(struct device *dev, struct device_attribute *da, 740 const char *buf, size_t count) 741 { 742 struct w83781d_data *data = dev_get_drvdata(dev); 743 unsigned long val; 744 u32 reg; 745 int err; 746 747 err = kstrtoul(buf, 10, &val); 748 if (err) 749 return err; 750 751 mutex_lock(&data->update_lock); 752 753 switch (val) { 754 case 0: 755 case 1: 756 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12); 757 w83781d_write_value(data, W83781D_REG_PWMCLK12, 758 (reg & 0xf7) | (val << 3)); 759 760 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 761 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, 762 (reg & 0xef) | (!val << 4)); 763 764 data->pwm2_enable = val; 765 break; 766 767 default: 768 mutex_unlock(&data->update_lock); 769 return -EINVAL; 770 } 771 772 mutex_unlock(&data->update_lock); 773 return count; 774 } 775 776 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0); 777 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1); 778 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2); 779 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3); 780 /* only PWM2 can be enabled/disabled */ 781 static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, 782 show_pwm2_enable, store_pwm2_enable); 783 784 static ssize_t 785 show_sensor(struct device *dev, struct device_attribute *da, char *buf) 786 { 787 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 788 struct w83781d_data *data = w83781d_update_device(dev); 789 return sprintf(buf, "%d\n", (int)data->sens[attr->index]); 790 } 791 792 static ssize_t 793 store_sensor(struct device *dev, struct device_attribute *da, 794 const char *buf, size_t count) 795 { 796 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 797 struct w83781d_data *data = dev_get_drvdata(dev); 798 int nr = attr->index; 799 unsigned long val; 800 u32 tmp; 801 int err; 802 803 err = kstrtoul(buf, 10, &val); 804 if (err) 805 return err; 806 807 mutex_lock(&data->update_lock); 808 809 switch (val) { 810 case 1: /* PII/Celeron diode */ 811 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 812 w83781d_write_value(data, W83781D_REG_SCFG1, 813 tmp | BIT_SCFG1[nr]); 814 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 815 w83781d_write_value(data, W83781D_REG_SCFG2, 816 tmp | BIT_SCFG2[nr]); 817 data->sens[nr] = val; 818 break; 819 case 2: /* 3904 */ 820 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 821 w83781d_write_value(data, W83781D_REG_SCFG1, 822 tmp | BIT_SCFG1[nr]); 823 tmp = w83781d_read_value(data, W83781D_REG_SCFG2); 824 w83781d_write_value(data, W83781D_REG_SCFG2, 825 tmp & ~BIT_SCFG2[nr]); 826 data->sens[nr] = val; 827 break; 828 case W83781D_DEFAULT_BETA: 829 dev_warn(dev, 830 "Sensor type %d is deprecated, please use 4 instead\n", 831 W83781D_DEFAULT_BETA); 832 /* fall through */ 833 case 4: /* thermistor */ 834 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 835 w83781d_write_value(data, W83781D_REG_SCFG1, 836 tmp & ~BIT_SCFG1[nr]); 837 data->sens[nr] = val; 838 break; 839 default: 840 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n", 841 (long) val); 842 break; 843 } 844 845 mutex_unlock(&data->update_lock); 846 return count; 847 } 848 849 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, 850 show_sensor, store_sensor, 0); 851 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, 852 show_sensor, store_sensor, 1); 853 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, 854 show_sensor, store_sensor, 2); 855 856 /* 857 * Assumes that adapter is of I2C, not ISA variety. 858 * OTHERWISE DON'T CALL THIS 859 */ 860 static int 861 w83781d_detect_subclients(struct i2c_client *new_client) 862 { 863 int i, val1 = 0, id; 864 int err; 865 int address = new_client->addr; 866 unsigned short sc_addr[2]; 867 struct i2c_adapter *adapter = new_client->adapter; 868 struct w83781d_data *data = i2c_get_clientdata(new_client); 869 enum chips kind = data->type; 870 int num_sc = 1; 871 872 id = i2c_adapter_id(adapter); 873 874 if (force_subclients[0] == id && force_subclients[1] == address) { 875 for (i = 2; i <= 3; i++) { 876 if (force_subclients[i] < 0x48 || 877 force_subclients[i] > 0x4f) { 878 dev_err(&new_client->dev, 879 "Invalid subclient address %d; must be 0x48-0x4f\n", 880 force_subclients[i]); 881 err = -EINVAL; 882 goto ERROR_SC_1; 883 } 884 } 885 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR, 886 (force_subclients[2] & 0x07) | 887 ((force_subclients[3] & 0x07) << 4)); 888 sc_addr[0] = force_subclients[2]; 889 } else { 890 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR); 891 sc_addr[0] = 0x48 + (val1 & 0x07); 892 } 893 894 if (kind != w83783s) { 895 num_sc = 2; 896 if (force_subclients[0] == id && 897 force_subclients[1] == address) { 898 sc_addr[1] = force_subclients[3]; 899 } else { 900 sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07); 901 } 902 if (sc_addr[0] == sc_addr[1]) { 903 dev_err(&new_client->dev, 904 "Duplicate addresses 0x%x for subclients.\n", 905 sc_addr[0]); 906 err = -EBUSY; 907 goto ERROR_SC_2; 908 } 909 } 910 911 for (i = 0; i < num_sc; i++) { 912 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]); 913 if (!data->lm75[i]) { 914 dev_err(&new_client->dev, 915 "Subclient %d registration at address 0x%x failed.\n", 916 i, sc_addr[i]); 917 err = -ENOMEM; 918 if (i == 1) 919 goto ERROR_SC_3; 920 goto ERROR_SC_2; 921 } 922 } 923 924 return 0; 925 926 /* Undo inits in case of errors */ 927 ERROR_SC_3: 928 i2c_unregister_device(data->lm75[0]); 929 ERROR_SC_2: 930 ERROR_SC_1: 931 return err; 932 } 933 934 #define IN_UNIT_ATTRS(X) \ 935 &sensor_dev_attr_in##X##_input.dev_attr.attr, \ 936 &sensor_dev_attr_in##X##_min.dev_attr.attr, \ 937 &sensor_dev_attr_in##X##_max.dev_attr.attr, \ 938 &sensor_dev_attr_in##X##_alarm.dev_attr.attr, \ 939 &sensor_dev_attr_in##X##_beep.dev_attr.attr 940 941 #define FAN_UNIT_ATTRS(X) \ 942 &sensor_dev_attr_fan##X##_input.dev_attr.attr, \ 943 &sensor_dev_attr_fan##X##_min.dev_attr.attr, \ 944 &sensor_dev_attr_fan##X##_div.dev_attr.attr, \ 945 &sensor_dev_attr_fan##X##_alarm.dev_attr.attr, \ 946 &sensor_dev_attr_fan##X##_beep.dev_attr.attr 947 948 #define TEMP_UNIT_ATTRS(X) \ 949 &sensor_dev_attr_temp##X##_input.dev_attr.attr, \ 950 &sensor_dev_attr_temp##X##_max.dev_attr.attr, \ 951 &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr, \ 952 &sensor_dev_attr_temp##X##_alarm.dev_attr.attr, \ 953 &sensor_dev_attr_temp##X##_beep.dev_attr.attr 954 955 static struct attribute *w83781d_attributes[] = { 956 IN_UNIT_ATTRS(0), 957 IN_UNIT_ATTRS(2), 958 IN_UNIT_ATTRS(3), 959 IN_UNIT_ATTRS(4), 960 IN_UNIT_ATTRS(5), 961 IN_UNIT_ATTRS(6), 962 FAN_UNIT_ATTRS(1), 963 FAN_UNIT_ATTRS(2), 964 FAN_UNIT_ATTRS(3), 965 TEMP_UNIT_ATTRS(1), 966 TEMP_UNIT_ATTRS(2), 967 &dev_attr_cpu0_vid.attr, 968 &dev_attr_vrm.attr, 969 &dev_attr_alarms.attr, 970 &dev_attr_beep_mask.attr, 971 &sensor_dev_attr_beep_enable.dev_attr.attr, 972 NULL 973 }; 974 static const struct attribute_group w83781d_group = { 975 .attrs = w83781d_attributes, 976 }; 977 978 static struct attribute *w83781d_attributes_in1[] = { 979 IN_UNIT_ATTRS(1), 980 NULL 981 }; 982 static const struct attribute_group w83781d_group_in1 = { 983 .attrs = w83781d_attributes_in1, 984 }; 985 986 static struct attribute *w83781d_attributes_in78[] = { 987 IN_UNIT_ATTRS(7), 988 IN_UNIT_ATTRS(8), 989 NULL 990 }; 991 static const struct attribute_group w83781d_group_in78 = { 992 .attrs = w83781d_attributes_in78, 993 }; 994 995 static struct attribute *w83781d_attributes_temp3[] = { 996 TEMP_UNIT_ATTRS(3), 997 NULL 998 }; 999 static const struct attribute_group w83781d_group_temp3 = { 1000 .attrs = w83781d_attributes_temp3, 1001 }; 1002 1003 static struct attribute *w83781d_attributes_pwm12[] = { 1004 &sensor_dev_attr_pwm1.dev_attr.attr, 1005 &sensor_dev_attr_pwm2.dev_attr.attr, 1006 &dev_attr_pwm2_enable.attr, 1007 NULL 1008 }; 1009 static const struct attribute_group w83781d_group_pwm12 = { 1010 .attrs = w83781d_attributes_pwm12, 1011 }; 1012 1013 static struct attribute *w83781d_attributes_pwm34[] = { 1014 &sensor_dev_attr_pwm3.dev_attr.attr, 1015 &sensor_dev_attr_pwm4.dev_attr.attr, 1016 NULL 1017 }; 1018 static const struct attribute_group w83781d_group_pwm34 = { 1019 .attrs = w83781d_attributes_pwm34, 1020 }; 1021 1022 static struct attribute *w83781d_attributes_other[] = { 1023 &sensor_dev_attr_temp1_type.dev_attr.attr, 1024 &sensor_dev_attr_temp2_type.dev_attr.attr, 1025 &sensor_dev_attr_temp3_type.dev_attr.attr, 1026 NULL 1027 }; 1028 static const struct attribute_group w83781d_group_other = { 1029 .attrs = w83781d_attributes_other, 1030 }; 1031 1032 /* No clean up is done on error, it's up to the caller */ 1033 static int 1034 w83781d_create_files(struct device *dev, int kind, int is_isa) 1035 { 1036 int err; 1037 1038 err = sysfs_create_group(&dev->kobj, &w83781d_group); 1039 if (err) 1040 return err; 1041 1042 if (kind != w83783s) { 1043 err = sysfs_create_group(&dev->kobj, &w83781d_group_in1); 1044 if (err) 1045 return err; 1046 } 1047 if (kind != as99127f && kind != w83781d && kind != w83783s) { 1048 err = sysfs_create_group(&dev->kobj, &w83781d_group_in78); 1049 if (err) 1050 return err; 1051 } 1052 if (kind != w83783s) { 1053 err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3); 1054 if (err) 1055 return err; 1056 1057 if (kind != w83781d) { 1058 err = sysfs_chmod_file(&dev->kobj, 1059 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1060 S_IRUGO | S_IWUSR); 1061 if (err) 1062 return err; 1063 } 1064 } 1065 1066 if (kind != w83781d && kind != as99127f) { 1067 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12); 1068 if (err) 1069 return err; 1070 } 1071 if (kind == w83782d && !is_isa) { 1072 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34); 1073 if (err) 1074 return err; 1075 } 1076 1077 if (kind != as99127f && kind != w83781d) { 1078 err = device_create_file(dev, 1079 &sensor_dev_attr_temp1_type.dev_attr); 1080 if (err) 1081 return err; 1082 err = device_create_file(dev, 1083 &sensor_dev_attr_temp2_type.dev_attr); 1084 if (err) 1085 return err; 1086 if (kind != w83783s) { 1087 err = device_create_file(dev, 1088 &sensor_dev_attr_temp3_type.dev_attr); 1089 if (err) 1090 return err; 1091 } 1092 } 1093 1094 return 0; 1095 } 1096 1097 /* Return 0 if detection is successful, -ENODEV otherwise */ 1098 static int 1099 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info) 1100 { 1101 int val1, val2; 1102 struct w83781d_data *isa = w83781d_data_if_isa(); 1103 struct i2c_adapter *adapter = client->adapter; 1104 int address = client->addr; 1105 const char *client_name; 1106 enum vendor { winbond, asus } vendid; 1107 1108 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1109 return -ENODEV; 1110 1111 /* 1112 * We block updates of the ISA device to minimize the risk of 1113 * concurrent access to the same W83781D chip through different 1114 * interfaces. 1115 */ 1116 if (isa) 1117 mutex_lock(&isa->update_lock); 1118 1119 if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) { 1120 dev_dbg(&adapter->dev, 1121 "Detection of w83781d chip failed at step 3\n"); 1122 goto err_nodev; 1123 } 1124 1125 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK); 1126 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); 1127 /* Check for Winbond or Asus ID if in bank 0 */ 1128 if (!(val1 & 0x07) && 1129 ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) || 1130 ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) { 1131 dev_dbg(&adapter->dev, 1132 "Detection of w83781d chip failed at step 4\n"); 1133 goto err_nodev; 1134 } 1135 /* 1136 * If Winbond SMBus, check address at 0x48. 1137 * Asus doesn't support, except for as99127f rev.2 1138 */ 1139 if ((!(val1 & 0x80) && val2 == 0xa3) || 1140 ((val1 & 0x80) && val2 == 0x5c)) { 1141 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR) 1142 != address) { 1143 dev_dbg(&adapter->dev, 1144 "Detection of w83781d chip failed at step 5\n"); 1145 goto err_nodev; 1146 } 1147 } 1148 1149 /* Put it now into bank 0 and Vendor ID High Byte */ 1150 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1151 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK) 1152 & 0x78) | 0x80); 1153 1154 /* Get the vendor ID */ 1155 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); 1156 if (val2 == 0x5c) 1157 vendid = winbond; 1158 else if (val2 == 0x12) 1159 vendid = asus; 1160 else { 1161 dev_dbg(&adapter->dev, 1162 "w83781d chip vendor is neither Winbond nor Asus\n"); 1163 goto err_nodev; 1164 } 1165 1166 /* Determine the chip type. */ 1167 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID); 1168 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond) 1169 client_name = "w83781d"; 1170 else if (val1 == 0x30 && vendid == winbond) 1171 client_name = "w83782d"; 1172 else if (val1 == 0x40 && vendid == winbond && address == 0x2d) 1173 client_name = "w83783s"; 1174 else if (val1 == 0x31) 1175 client_name = "as99127f"; 1176 else 1177 goto err_nodev; 1178 1179 if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) { 1180 dev_dbg(&adapter->dev, 1181 "Device at 0x%02x appears to be the same as ISA device\n", 1182 address); 1183 goto err_nodev; 1184 } 1185 1186 if (isa) 1187 mutex_unlock(&isa->update_lock); 1188 1189 strlcpy(info->type, client_name, I2C_NAME_SIZE); 1190 1191 return 0; 1192 1193 err_nodev: 1194 if (isa) 1195 mutex_unlock(&isa->update_lock); 1196 return -ENODEV; 1197 } 1198 1199 static void w83781d_remove_files(struct device *dev) 1200 { 1201 sysfs_remove_group(&dev->kobj, &w83781d_group); 1202 sysfs_remove_group(&dev->kobj, &w83781d_group_in1); 1203 sysfs_remove_group(&dev->kobj, &w83781d_group_in78); 1204 sysfs_remove_group(&dev->kobj, &w83781d_group_temp3); 1205 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12); 1206 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34); 1207 sysfs_remove_group(&dev->kobj, &w83781d_group_other); 1208 } 1209 1210 static int 1211 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id) 1212 { 1213 struct device *dev = &client->dev; 1214 struct w83781d_data *data; 1215 int err; 1216 1217 data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL); 1218 if (!data) 1219 return -ENOMEM; 1220 1221 i2c_set_clientdata(client, data); 1222 mutex_init(&data->lock); 1223 mutex_init(&data->update_lock); 1224 1225 data->type = id->driver_data; 1226 data->client = client; 1227 1228 /* attach secondary i2c lm75-like clients */ 1229 err = w83781d_detect_subclients(client); 1230 if (err) 1231 return err; 1232 1233 /* Initialize the chip */ 1234 w83781d_init_device(dev); 1235 1236 /* Register sysfs hooks */ 1237 err = w83781d_create_files(dev, data->type, 0); 1238 if (err) 1239 goto exit_remove_files; 1240 1241 data->hwmon_dev = hwmon_device_register(dev); 1242 if (IS_ERR(data->hwmon_dev)) { 1243 err = PTR_ERR(data->hwmon_dev); 1244 goto exit_remove_files; 1245 } 1246 1247 return 0; 1248 1249 exit_remove_files: 1250 w83781d_remove_files(dev); 1251 if (data->lm75[0]) 1252 i2c_unregister_device(data->lm75[0]); 1253 if (data->lm75[1]) 1254 i2c_unregister_device(data->lm75[1]); 1255 return err; 1256 } 1257 1258 static int 1259 w83781d_remove(struct i2c_client *client) 1260 { 1261 struct w83781d_data *data = i2c_get_clientdata(client); 1262 struct device *dev = &client->dev; 1263 1264 hwmon_device_unregister(data->hwmon_dev); 1265 w83781d_remove_files(dev); 1266 1267 if (data->lm75[0]) 1268 i2c_unregister_device(data->lm75[0]); 1269 if (data->lm75[1]) 1270 i2c_unregister_device(data->lm75[1]); 1271 1272 return 0; 1273 } 1274 1275 static int 1276 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg) 1277 { 1278 struct i2c_client *client = data->client; 1279 int res, bank; 1280 struct i2c_client *cl; 1281 1282 bank = (reg >> 8) & 0x0f; 1283 if (bank > 2) 1284 /* switch banks */ 1285 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1286 bank); 1287 if (bank == 0 || bank > 2) { 1288 res = i2c_smbus_read_byte_data(client, reg & 0xff); 1289 } else { 1290 /* switch to subclient */ 1291 cl = data->lm75[bank - 1]; 1292 /* convert from ISA to LM75 I2C addresses */ 1293 switch (reg & 0xff) { 1294 case 0x50: /* TEMP */ 1295 res = i2c_smbus_read_word_swapped(cl, 0); 1296 break; 1297 case 0x52: /* CONFIG */ 1298 res = i2c_smbus_read_byte_data(cl, 1); 1299 break; 1300 case 0x53: /* HYST */ 1301 res = i2c_smbus_read_word_swapped(cl, 2); 1302 break; 1303 case 0x55: /* OVER */ 1304 default: 1305 res = i2c_smbus_read_word_swapped(cl, 3); 1306 break; 1307 } 1308 } 1309 if (bank > 2) 1310 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1311 1312 return res; 1313 } 1314 1315 static int 1316 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value) 1317 { 1318 struct i2c_client *client = data->client; 1319 int bank; 1320 struct i2c_client *cl; 1321 1322 bank = (reg >> 8) & 0x0f; 1323 if (bank > 2) 1324 /* switch banks */ 1325 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 1326 bank); 1327 if (bank == 0 || bank > 2) { 1328 i2c_smbus_write_byte_data(client, reg & 0xff, 1329 value & 0xff); 1330 } else { 1331 /* switch to subclient */ 1332 cl = data->lm75[bank - 1]; 1333 /* convert from ISA to LM75 I2C addresses */ 1334 switch (reg & 0xff) { 1335 case 0x52: /* CONFIG */ 1336 i2c_smbus_write_byte_data(cl, 1, value & 0xff); 1337 break; 1338 case 0x53: /* HYST */ 1339 i2c_smbus_write_word_swapped(cl, 2, value); 1340 break; 1341 case 0x55: /* OVER */ 1342 i2c_smbus_write_word_swapped(cl, 3, value); 1343 break; 1344 } 1345 } 1346 if (bank > 2) 1347 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); 1348 1349 return 0; 1350 } 1351 1352 static void 1353 w83781d_init_device(struct device *dev) 1354 { 1355 struct w83781d_data *data = dev_get_drvdata(dev); 1356 int i, p; 1357 int type = data->type; 1358 u8 tmp; 1359 1360 if (reset && type != as99127f) { /* 1361 * this resets registers we don't have 1362 * documentation for on the as99127f 1363 */ 1364 /* 1365 * Resetting the chip has been the default for a long time, 1366 * but it causes the BIOS initializations (fan clock dividers, 1367 * thermal sensor types...) to be lost, so it is now optional. 1368 * It might even go away if nobody reports it as being useful, 1369 * as I see very little reason why this would be needed at 1370 * all. 1371 */ 1372 dev_info(dev, 1373 "If reset=1 solved a problem you were having, please report!\n"); 1374 1375 /* save these registers */ 1376 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1377 p = w83781d_read_value(data, W83781D_REG_PWMCLK12); 1378 /* 1379 * Reset all except Watchdog values and last conversion values 1380 * This sets fan-divs to 2, among others 1381 */ 1382 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80); 1383 /* 1384 * Restore the registers and disable power-on abnormal beep. 1385 * This saves FAN 1/2/3 input/output values set by BIOS. 1386 */ 1387 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1388 w83781d_write_value(data, W83781D_REG_PWMCLK12, p); 1389 /* 1390 * Disable master beep-enable (reset turns it on). 1391 * Individual beep_mask should be reset to off but for some 1392 * reason disabling this bit helps some people not get beeped 1393 */ 1394 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0); 1395 } 1396 1397 /* 1398 * Disable power-on abnormal beep, as advised by the datasheet. 1399 * Already done if reset=1. 1400 */ 1401 if (init && !reset && type != as99127f) { 1402 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); 1403 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); 1404 } 1405 1406 data->vrm = vid_which_vrm(); 1407 1408 if ((type != w83781d) && (type != as99127f)) { 1409 tmp = w83781d_read_value(data, W83781D_REG_SCFG1); 1410 for (i = 1; i <= 3; i++) { 1411 if (!(tmp & BIT_SCFG1[i - 1])) { 1412 data->sens[i - 1] = 4; 1413 } else { 1414 if (w83781d_read_value 1415 (data, 1416 W83781D_REG_SCFG2) & BIT_SCFG2[i - 1]) 1417 data->sens[i - 1] = 1; 1418 else 1419 data->sens[i - 1] = 2; 1420 } 1421 if (type == w83783s && i == 2) 1422 break; 1423 } 1424 } 1425 1426 if (init && type != as99127f) { 1427 /* Enable temp2 */ 1428 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG); 1429 if (tmp & 0x01) { 1430 dev_warn(dev, 1431 "Enabling temp2, readings might not make sense\n"); 1432 w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG, 1433 tmp & 0xfe); 1434 } 1435 1436 /* Enable temp3 */ 1437 if (type != w83783s) { 1438 tmp = w83781d_read_value(data, 1439 W83781D_REG_TEMP3_CONFIG); 1440 if (tmp & 0x01) { 1441 dev_warn(dev, 1442 "Enabling temp3, readings might not make sense\n"); 1443 w83781d_write_value(data, 1444 W83781D_REG_TEMP3_CONFIG, tmp & 0xfe); 1445 } 1446 } 1447 } 1448 1449 /* Start monitoring */ 1450 w83781d_write_value(data, W83781D_REG_CONFIG, 1451 (w83781d_read_value(data, 1452 W83781D_REG_CONFIG) & 0xf7) 1453 | 0x01); 1454 1455 /* A few vars need to be filled upon startup */ 1456 for (i = 0; i < 3; i++) { 1457 data->fan_min[i] = w83781d_read_value(data, 1458 W83781D_REG_FAN_MIN(i)); 1459 } 1460 1461 mutex_init(&data->update_lock); 1462 } 1463 1464 static struct w83781d_data *w83781d_update_device(struct device *dev) 1465 { 1466 struct w83781d_data *data = dev_get_drvdata(dev); 1467 struct i2c_client *client = data->client; 1468 int i; 1469 1470 mutex_lock(&data->update_lock); 1471 1472 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 1473 || !data->valid) { 1474 dev_dbg(dev, "Starting device update\n"); 1475 1476 for (i = 0; i <= 8; i++) { 1477 if (data->type == w83783s && i == 1) 1478 continue; /* 783S has no in1 */ 1479 data->in[i] = 1480 w83781d_read_value(data, W83781D_REG_IN(i)); 1481 data->in_min[i] = 1482 w83781d_read_value(data, W83781D_REG_IN_MIN(i)); 1483 data->in_max[i] = 1484 w83781d_read_value(data, W83781D_REG_IN_MAX(i)); 1485 if ((data->type != w83782d) && (i == 6)) 1486 break; 1487 } 1488 for (i = 0; i < 3; i++) { 1489 data->fan[i] = 1490 w83781d_read_value(data, W83781D_REG_FAN(i)); 1491 data->fan_min[i] = 1492 w83781d_read_value(data, W83781D_REG_FAN_MIN(i)); 1493 } 1494 if (data->type != w83781d && data->type != as99127f) { 1495 for (i = 0; i < 4; i++) { 1496 data->pwm[i] = 1497 w83781d_read_value(data, 1498 W83781D_REG_PWM[i]); 1499 /* Only W83782D on SMBus has PWM3 and PWM4 */ 1500 if ((data->type != w83782d || !client) 1501 && i == 1) 1502 break; 1503 } 1504 /* Only PWM2 can be disabled */ 1505 data->pwm2_enable = (w83781d_read_value(data, 1506 W83781D_REG_PWMCLK12) & 0x08) >> 3; 1507 } 1508 1509 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1)); 1510 data->temp_max = 1511 w83781d_read_value(data, W83781D_REG_TEMP_OVER(1)); 1512 data->temp_max_hyst = 1513 w83781d_read_value(data, W83781D_REG_TEMP_HYST(1)); 1514 data->temp_add[0] = 1515 w83781d_read_value(data, W83781D_REG_TEMP(2)); 1516 data->temp_max_add[0] = 1517 w83781d_read_value(data, W83781D_REG_TEMP_OVER(2)); 1518 data->temp_max_hyst_add[0] = 1519 w83781d_read_value(data, W83781D_REG_TEMP_HYST(2)); 1520 if (data->type != w83783s) { 1521 data->temp_add[1] = 1522 w83781d_read_value(data, W83781D_REG_TEMP(3)); 1523 data->temp_max_add[1] = 1524 w83781d_read_value(data, 1525 W83781D_REG_TEMP_OVER(3)); 1526 data->temp_max_hyst_add[1] = 1527 w83781d_read_value(data, 1528 W83781D_REG_TEMP_HYST(3)); 1529 } 1530 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV); 1531 data->vid = i & 0x0f; 1532 data->vid |= (w83781d_read_value(data, 1533 W83781D_REG_CHIPID) & 0x01) << 4; 1534 data->fan_div[0] = (i >> 4) & 0x03; 1535 data->fan_div[1] = (i >> 6) & 0x03; 1536 data->fan_div[2] = (w83781d_read_value(data, 1537 W83781D_REG_PIN) >> 6) & 0x03; 1538 if ((data->type != w83781d) && (data->type != as99127f)) { 1539 i = w83781d_read_value(data, W83781D_REG_VBAT); 1540 data->fan_div[0] |= (i >> 3) & 0x04; 1541 data->fan_div[1] |= (i >> 4) & 0x04; 1542 data->fan_div[2] |= (i >> 5) & 0x04; 1543 } 1544 if (data->type == w83782d) { 1545 data->alarms = w83781d_read_value(data, 1546 W83782D_REG_ALARM1) 1547 | (w83781d_read_value(data, 1548 W83782D_REG_ALARM2) << 8) 1549 | (w83781d_read_value(data, 1550 W83782D_REG_ALARM3) << 16); 1551 } else if (data->type == w83783s) { 1552 data->alarms = w83781d_read_value(data, 1553 W83782D_REG_ALARM1) 1554 | (w83781d_read_value(data, 1555 W83782D_REG_ALARM2) << 8); 1556 } else { 1557 /* 1558 * No real-time status registers, fall back to 1559 * interrupt status registers 1560 */ 1561 data->alarms = w83781d_read_value(data, 1562 W83781D_REG_ALARM1) 1563 | (w83781d_read_value(data, 1564 W83781D_REG_ALARM2) << 8); 1565 } 1566 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); 1567 data->beep_mask = (i << 8) + 1568 w83781d_read_value(data, W83781D_REG_BEEP_INTS1); 1569 if ((data->type != w83781d) && (data->type != as99127f)) { 1570 data->beep_mask |= 1571 w83781d_read_value(data, 1572 W83781D_REG_BEEP_INTS3) << 16; 1573 } 1574 data->last_updated = jiffies; 1575 data->valid = 1; 1576 } 1577 1578 mutex_unlock(&data->update_lock); 1579 1580 return data; 1581 } 1582 1583 static const struct i2c_device_id w83781d_ids[] = { 1584 { "w83781d", w83781d, }, 1585 { "w83782d", w83782d, }, 1586 { "w83783s", w83783s, }, 1587 { "as99127f", as99127f }, 1588 { /* LIST END */ } 1589 }; 1590 MODULE_DEVICE_TABLE(i2c, w83781d_ids); 1591 1592 static struct i2c_driver w83781d_driver = { 1593 .class = I2C_CLASS_HWMON, 1594 .driver = { 1595 .name = "w83781d", 1596 }, 1597 .probe = w83781d_probe, 1598 .remove = w83781d_remove, 1599 .id_table = w83781d_ids, 1600 .detect = w83781d_detect, 1601 .address_list = normal_i2c, 1602 }; 1603 1604 /* 1605 * ISA related code 1606 */ 1607 #ifdef CONFIG_ISA 1608 1609 /* ISA device, if found */ 1610 static struct platform_device *pdev; 1611 1612 static unsigned short isa_address = 0x290; 1613 1614 /* 1615 * I2C devices get this name attribute automatically, but for ISA devices 1616 * we must create it by ourselves. 1617 */ 1618 static ssize_t 1619 show_name(struct device *dev, struct device_attribute *devattr, char *buf) 1620 { 1621 struct w83781d_data *data = dev_get_drvdata(dev); 1622 return sprintf(buf, "%s\n", data->name); 1623 } 1624 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 1625 1626 static struct w83781d_data *w83781d_data_if_isa(void) 1627 { 1628 return pdev ? platform_get_drvdata(pdev) : NULL; 1629 } 1630 1631 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ 1632 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) 1633 { 1634 struct w83781d_data *isa; 1635 int i; 1636 1637 if (!pdev) /* No ISA chip */ 1638 return 0; 1639 1640 isa = platform_get_drvdata(pdev); 1641 1642 if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr) 1643 return 0; /* Address doesn't match */ 1644 if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid) 1645 return 0; /* Chip type doesn't match */ 1646 1647 /* 1648 * We compare all the limit registers, the config register and the 1649 * interrupt mask registers 1650 */ 1651 for (i = 0x2b; i <= 0x3d; i++) { 1652 if (w83781d_read_value(isa, i) != 1653 i2c_smbus_read_byte_data(client, i)) 1654 return 0; 1655 } 1656 if (w83781d_read_value(isa, W83781D_REG_CONFIG) != 1657 i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG)) 1658 return 0; 1659 for (i = 0x43; i <= 0x46; i++) { 1660 if (w83781d_read_value(isa, i) != 1661 i2c_smbus_read_byte_data(client, i)) 1662 return 0; 1663 } 1664 1665 return 1; 1666 } 1667 1668 static int 1669 w83781d_read_value_isa(struct w83781d_data *data, u16 reg) 1670 { 1671 int word_sized, res; 1672 1673 word_sized = (((reg & 0xff00) == 0x100) 1674 || ((reg & 0xff00) == 0x200)) 1675 && (((reg & 0x00ff) == 0x50) 1676 || ((reg & 0x00ff) == 0x53) 1677 || ((reg & 0x00ff) == 0x55)); 1678 if (reg & 0xff00) { 1679 outb_p(W83781D_REG_BANK, 1680 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1681 outb_p(reg >> 8, 1682 data->isa_addr + W83781D_DATA_REG_OFFSET); 1683 } 1684 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); 1685 res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET); 1686 if (word_sized) { 1687 outb_p((reg & 0xff) + 1, 1688 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1689 res = 1690 (res << 8) + inb_p(data->isa_addr + 1691 W83781D_DATA_REG_OFFSET); 1692 } 1693 if (reg & 0xff00) { 1694 outb_p(W83781D_REG_BANK, 1695 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1696 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); 1697 } 1698 return res; 1699 } 1700 1701 static void 1702 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value) 1703 { 1704 int word_sized; 1705 1706 word_sized = (((reg & 0xff00) == 0x100) 1707 || ((reg & 0xff00) == 0x200)) 1708 && (((reg & 0x00ff) == 0x53) 1709 || ((reg & 0x00ff) == 0x55)); 1710 if (reg & 0xff00) { 1711 outb_p(W83781D_REG_BANK, 1712 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1713 outb_p(reg >> 8, 1714 data->isa_addr + W83781D_DATA_REG_OFFSET); 1715 } 1716 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); 1717 if (word_sized) { 1718 outb_p(value >> 8, 1719 data->isa_addr + W83781D_DATA_REG_OFFSET); 1720 outb_p((reg & 0xff) + 1, 1721 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1722 } 1723 outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET); 1724 if (reg & 0xff00) { 1725 outb_p(W83781D_REG_BANK, 1726 data->isa_addr + W83781D_ADDR_REG_OFFSET); 1727 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); 1728 } 1729 } 1730 1731 /* 1732 * The SMBus locks itself, usually, but nothing may access the Winbond between 1733 * bank switches. ISA access must always be locked explicitly! 1734 * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, 1735 * would slow down the W83781D access and should not be necessary. 1736 * There are some ugly typecasts here, but the good news is - they should 1737 * nowhere else be necessary! 1738 */ 1739 static int 1740 w83781d_read_value(struct w83781d_data *data, u16 reg) 1741 { 1742 struct i2c_client *client = data->client; 1743 int res; 1744 1745 mutex_lock(&data->lock); 1746 if (client) 1747 res = w83781d_read_value_i2c(data, reg); 1748 else 1749 res = w83781d_read_value_isa(data, reg); 1750 mutex_unlock(&data->lock); 1751 return res; 1752 } 1753 1754 static int 1755 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) 1756 { 1757 struct i2c_client *client = data->client; 1758 1759 mutex_lock(&data->lock); 1760 if (client) 1761 w83781d_write_value_i2c(data, reg, value); 1762 else 1763 w83781d_write_value_isa(data, reg, value); 1764 mutex_unlock(&data->lock); 1765 return 0; 1766 } 1767 1768 static int 1769 w83781d_isa_probe(struct platform_device *pdev) 1770 { 1771 int err, reg; 1772 struct w83781d_data *data; 1773 struct resource *res; 1774 1775 /* Reserve the ISA region */ 1776 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1777 if (!devm_request_region(&pdev->dev, 1778 res->start + W83781D_ADDR_REG_OFFSET, 2, 1779 "w83781d")) 1780 return -EBUSY; 1781 1782 data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data), 1783 GFP_KERNEL); 1784 if (!data) 1785 return -ENOMEM; 1786 1787 mutex_init(&data->lock); 1788 data->isa_addr = res->start; 1789 platform_set_drvdata(pdev, data); 1790 1791 reg = w83781d_read_value(data, W83781D_REG_WCHIPID); 1792 switch (reg) { 1793 case 0x30: 1794 data->type = w83782d; 1795 data->name = "w83782d"; 1796 break; 1797 default: 1798 data->type = w83781d; 1799 data->name = "w83781d"; 1800 } 1801 1802 /* Initialize the W83781D chip */ 1803 w83781d_init_device(&pdev->dev); 1804 1805 /* Register sysfs hooks */ 1806 err = w83781d_create_files(&pdev->dev, data->type, 1); 1807 if (err) 1808 goto exit_remove_files; 1809 1810 err = device_create_file(&pdev->dev, &dev_attr_name); 1811 if (err) 1812 goto exit_remove_files; 1813 1814 data->hwmon_dev = hwmon_device_register(&pdev->dev); 1815 if (IS_ERR(data->hwmon_dev)) { 1816 err = PTR_ERR(data->hwmon_dev); 1817 goto exit_remove_files; 1818 } 1819 1820 return 0; 1821 1822 exit_remove_files: 1823 w83781d_remove_files(&pdev->dev); 1824 device_remove_file(&pdev->dev, &dev_attr_name); 1825 return err; 1826 } 1827 1828 static int 1829 w83781d_isa_remove(struct platform_device *pdev) 1830 { 1831 struct w83781d_data *data = platform_get_drvdata(pdev); 1832 1833 hwmon_device_unregister(data->hwmon_dev); 1834 w83781d_remove_files(&pdev->dev); 1835 device_remove_file(&pdev->dev, &dev_attr_name); 1836 1837 return 0; 1838 } 1839 1840 static struct platform_driver w83781d_isa_driver = { 1841 .driver = { 1842 .name = "w83781d", 1843 }, 1844 .probe = w83781d_isa_probe, 1845 .remove = w83781d_isa_remove, 1846 }; 1847 1848 /* return 1 if a supported chip is found, 0 otherwise */ 1849 static int __init 1850 w83781d_isa_found(unsigned short address) 1851 { 1852 int val, save, found = 0; 1853 int port; 1854 1855 /* 1856 * Some boards declare base+0 to base+7 as a PNP device, some base+4 1857 * to base+7 and some base+5 to base+6. So we better request each port 1858 * individually for the probing phase. 1859 */ 1860 for (port = address; port < address + W83781D_EXTENT; port++) { 1861 if (!request_region(port, 1, "w83781d")) { 1862 pr_debug("Failed to request port 0x%x\n", port); 1863 goto release; 1864 } 1865 } 1866 1867 #define REALLY_SLOW_IO 1868 /* 1869 * We need the timeouts for at least some W83781D-like 1870 * chips. But only if we read 'undefined' registers. 1871 */ 1872 val = inb_p(address + 1); 1873 if (inb_p(address + 2) != val 1874 || inb_p(address + 3) != val 1875 || inb_p(address + 7) != val) { 1876 pr_debug("Detection failed at step %d\n", 1); 1877 goto release; 1878 } 1879 #undef REALLY_SLOW_IO 1880 1881 /* 1882 * We should be able to change the 7 LSB of the address port. The 1883 * MSB (busy flag) should be clear initially, set after the write. 1884 */ 1885 save = inb_p(address + W83781D_ADDR_REG_OFFSET); 1886 if (save & 0x80) { 1887 pr_debug("Detection failed at step %d\n", 2); 1888 goto release; 1889 } 1890 val = ~save & 0x7f; 1891 outb_p(val, address + W83781D_ADDR_REG_OFFSET); 1892 if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) { 1893 outb_p(save, address + W83781D_ADDR_REG_OFFSET); 1894 pr_debug("Detection failed at step %d\n", 3); 1895 goto release; 1896 } 1897 1898 /* We found a device, now see if it could be a W83781D */ 1899 outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET); 1900 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1901 if (val & 0x80) { 1902 pr_debug("Detection failed at step %d\n", 4); 1903 goto release; 1904 } 1905 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1906 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1907 outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET); 1908 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1909 if ((!(save & 0x80) && (val != 0xa3)) 1910 || ((save & 0x80) && (val != 0x5c))) { 1911 pr_debug("Detection failed at step %d\n", 5); 1912 goto release; 1913 } 1914 outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET); 1915 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1916 if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */ 1917 pr_debug("Detection failed at step %d\n", 6); 1918 goto release; 1919 } 1920 1921 /* The busy flag should be clear again */ 1922 if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) { 1923 pr_debug("Detection failed at step %d\n", 7); 1924 goto release; 1925 } 1926 1927 /* Determine the chip type */ 1928 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET); 1929 save = inb_p(address + W83781D_DATA_REG_OFFSET); 1930 outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET); 1931 outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET); 1932 val = inb_p(address + W83781D_DATA_REG_OFFSET); 1933 if ((val & 0xfe) == 0x10 /* W83781D */ 1934 || val == 0x30) /* W83782D */ 1935 found = 1; 1936 1937 if (found) 1938 pr_info("Found a %s chip at %#x\n", 1939 val == 0x30 ? "W83782D" : "W83781D", (int)address); 1940 1941 release: 1942 for (port--; port >= address; port--) 1943 release_region(port, 1); 1944 return found; 1945 } 1946 1947 static int __init 1948 w83781d_isa_device_add(unsigned short address) 1949 { 1950 struct resource res = { 1951 .start = address, 1952 .end = address + W83781D_EXTENT - 1, 1953 .name = "w83781d", 1954 .flags = IORESOURCE_IO, 1955 }; 1956 int err; 1957 1958 pdev = platform_device_alloc("w83781d", address); 1959 if (!pdev) { 1960 err = -ENOMEM; 1961 pr_err("Device allocation failed\n"); 1962 goto exit; 1963 } 1964 1965 err = platform_device_add_resources(pdev, &res, 1); 1966 if (err) { 1967 pr_err("Device resource addition failed (%d)\n", err); 1968 goto exit_device_put; 1969 } 1970 1971 err = platform_device_add(pdev); 1972 if (err) { 1973 pr_err("Device addition failed (%d)\n", err); 1974 goto exit_device_put; 1975 } 1976 1977 return 0; 1978 1979 exit_device_put: 1980 platform_device_put(pdev); 1981 exit: 1982 pdev = NULL; 1983 return err; 1984 } 1985 1986 static int __init 1987 w83781d_isa_register(void) 1988 { 1989 int res; 1990 1991 if (w83781d_isa_found(isa_address)) { 1992 res = platform_driver_register(&w83781d_isa_driver); 1993 if (res) 1994 goto exit; 1995 1996 /* Sets global pdev as a side effect */ 1997 res = w83781d_isa_device_add(isa_address); 1998 if (res) 1999 goto exit_unreg_isa_driver; 2000 } 2001 2002 return 0; 2003 2004 exit_unreg_isa_driver: 2005 platform_driver_unregister(&w83781d_isa_driver); 2006 exit: 2007 return res; 2008 } 2009 2010 static void 2011 w83781d_isa_unregister(void) 2012 { 2013 if (pdev) { 2014 platform_device_unregister(pdev); 2015 platform_driver_unregister(&w83781d_isa_driver); 2016 } 2017 } 2018 #else /* !CONFIG_ISA */ 2019 2020 static struct w83781d_data *w83781d_data_if_isa(void) 2021 { 2022 return NULL; 2023 } 2024 2025 static int 2026 w83781d_alias_detect(struct i2c_client *client, u8 chipid) 2027 { 2028 return 0; 2029 } 2030 2031 static int 2032 w83781d_read_value(struct w83781d_data *data, u16 reg) 2033 { 2034 int res; 2035 2036 mutex_lock(&data->lock); 2037 res = w83781d_read_value_i2c(data, reg); 2038 mutex_unlock(&data->lock); 2039 2040 return res; 2041 } 2042 2043 static int 2044 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) 2045 { 2046 mutex_lock(&data->lock); 2047 w83781d_write_value_i2c(data, reg, value); 2048 mutex_unlock(&data->lock); 2049 2050 return 0; 2051 } 2052 2053 static int __init 2054 w83781d_isa_register(void) 2055 { 2056 return 0; 2057 } 2058 2059 static void 2060 w83781d_isa_unregister(void) 2061 { 2062 } 2063 #endif /* CONFIG_ISA */ 2064 2065 static int __init 2066 sensors_w83781d_init(void) 2067 { 2068 int res; 2069 2070 /* 2071 * We register the ISA device first, so that we can skip the 2072 * registration of an I2C interface to the same device. 2073 */ 2074 res = w83781d_isa_register(); 2075 if (res) 2076 goto exit; 2077 2078 res = i2c_add_driver(&w83781d_driver); 2079 if (res) 2080 goto exit_unreg_isa; 2081 2082 return 0; 2083 2084 exit_unreg_isa: 2085 w83781d_isa_unregister(); 2086 exit: 2087 return res; 2088 } 2089 2090 static void __exit 2091 sensors_w83781d_exit(void) 2092 { 2093 w83781d_isa_unregister(); 2094 i2c_del_driver(&w83781d_driver); 2095 } 2096 2097 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " 2098 "Philip Edelbrock <phil@netroedge.com>, " 2099 "and Mark Studebaker <mdsxyz123@yahoo.com>"); 2100 MODULE_DESCRIPTION("W83781D driver"); 2101 MODULE_LICENSE("GPL"); 2102 2103 module_init(sensors_w83781d_init); 2104 module_exit(sensors_w83781d_exit); 2105