1 /* 2 * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware 3 * monitoring features 4 * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com> 5 * 6 * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker 7 * and its port to kernel 2.6 by Lars Ekman. 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/jiffies.h> 30 #include <linux/platform_device.h> 31 #include <linux/hwmon.h> 32 #include <linux/hwmon-sysfs.h> 33 #include <linux/hwmon-vid.h> 34 #include <linux/err.h> 35 #include <linux/mutex.h> 36 #include <linux/ioport.h> 37 #include <linux/acpi.h> 38 #include <linux/io.h> 39 40 static int uch_config = -1; 41 module_param(uch_config, int, 0); 42 MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration"); 43 44 static int int_mode = -1; 45 module_param(int_mode, int, 0); 46 MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode"); 47 48 static unsigned short force_id; 49 module_param(force_id, ushort, 0); 50 MODULE_PARM_DESC(force_id, "Override the detected device ID"); 51 52 static struct platform_device *pdev; 53 54 #define DRVNAME "vt1211" 55 56 /* --------------------------------------------------------------------- 57 * Registers 58 * 59 * The sensors are defined as follows. 60 * 61 * Sensor Voltage Mode Temp Mode Notes (from the datasheet) 62 * -------- ------------ --------- -------------------------- 63 * Reading 1 temp1 Intel thermal diode 64 * Reading 3 temp2 Internal thermal diode 65 * UCH1/Reading2 in0 temp3 NTC type thermistor 66 * UCH2 in1 temp4 +2.5V 67 * UCH3 in2 temp5 VccP 68 * UCH4 in3 temp6 +5V 69 * UCH5 in4 temp7 +12V 70 * 3.3V in5 Internal VDD (+3.3V) 71 * 72 * --------------------------------------------------------------------- */ 73 74 /* Voltages (in) numbered 0-5 (ix) */ 75 #define VT1211_REG_IN(ix) (0x21 + (ix)) 76 #define VT1211_REG_IN_MIN(ix) ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix)) 77 #define VT1211_REG_IN_MAX(ix) ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix)) 78 79 /* Temperatures (temp) numbered 0-6 (ix) */ 80 static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25}; 81 static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31}; 82 static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32}; 83 84 /* Fans numbered 0-1 (ix) */ 85 #define VT1211_REG_FAN(ix) (0x29 + (ix)) 86 #define VT1211_REG_FAN_MIN(ix) (0x3b + (ix)) 87 #define VT1211_REG_FAN_DIV 0x47 88 89 /* PWMs numbered 0-1 (ix) */ 90 /* Auto points numbered 0-3 (ap) */ 91 #define VT1211_REG_PWM(ix) (0x60 + (ix)) 92 #define VT1211_REG_PWM_CLK 0x50 93 #define VT1211_REG_PWM_CTL 0x51 94 #define VT1211_REG_PWM_AUTO_TEMP(ap) (0x55 - (ap)) 95 #define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap)) 96 97 /* Miscellaneous registers */ 98 #define VT1211_REG_CONFIG 0x40 99 #define VT1211_REG_ALARM1 0x41 100 #define VT1211_REG_ALARM2 0x42 101 #define VT1211_REG_VID 0x45 102 #define VT1211_REG_UCH_CONFIG 0x4a 103 #define VT1211_REG_TEMP1_CONFIG 0x4b 104 #define VT1211_REG_TEMP2_CONFIG 0x4c 105 106 /* In, temp & fan alarm bits */ 107 static const u8 bitalarmin[] = {11, 0, 1, 3, 8, 2, 9}; 108 static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8}; 109 static const u8 bitalarmfan[] = {6, 7}; 110 111 /* --------------------------------------------------------------------- 112 * Data structures and manipulation thereof 113 * --------------------------------------------------------------------- */ 114 115 struct vt1211_data { 116 unsigned short addr; 117 const char *name; 118 struct device *hwmon_dev; 119 120 struct mutex update_lock; 121 char valid; /* !=0 if following fields are valid */ 122 unsigned long last_updated; /* In jiffies */ 123 124 /* Register values */ 125 u8 in[6]; 126 u8 in_max[6]; 127 u8 in_min[6]; 128 u8 temp[7]; 129 u8 temp_max[7]; 130 u8 temp_hyst[7]; 131 u8 fan[2]; 132 u8 fan_min[2]; 133 u8 fan_div[2]; 134 u8 fan_ctl; 135 u8 pwm[2]; 136 u8 pwm_ctl[2]; 137 u8 pwm_clk; 138 u8 pwm_auto_temp[4]; 139 u8 pwm_auto_pwm[2][4]; 140 u8 vid; /* Read once at init time */ 141 u8 vrm; 142 u8 uch_config; /* Read once at init time */ 143 u16 alarms; 144 }; 145 146 /* ix = [0-5] */ 147 #define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \ 148 !(((uch_config) >> ((ix) + 2)) & 1)) 149 150 /* ix = [0-6] */ 151 #define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \ 152 ((uch_config) >> (ix)) & 1) 153 154 /* 155 * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the 156 * driver according to the VT1211 BIOS porting guide 157 */ 158 #define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \ 159 (((reg) - 3) * 15882 + 479) / 958 : \ 160 (((reg) - 3) * 10000 + 479) / 958) 161 #define IN_TO_REG(ix, val) (SENSORS_LIMIT((ix) == 5 ? \ 162 ((val) * 958 + 7941) / 15882 + 3 : \ 163 ((val) * 958 + 5000) / 10000 + 3, 0, 255)) 164 165 /* 166 * temp1 (ix = 0) is an intel thermal diode which is scaled in user space. 167 * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver 168 * according to some measurements that I took on an EPIA M10000. 169 * temp3-7 are thermistor based so the driver returns the voltage measured at 170 * the pin (range 0V - 2.2V). 171 */ 172 #define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \ 173 (ix) == 1 ? (reg) < 51 ? 0 : \ 174 ((reg) - 51) * 1000 : \ 175 ((253 - (reg)) * 2200 + 105) / 210) 176 #define TEMP_TO_REG(ix, val) SENSORS_LIMIT( \ 177 ((ix) == 0 ? ((val) + 500) / 1000 : \ 178 (ix) == 1 ? ((val) + 500) / 1000 + 51 : \ 179 253 - ((val) * 210 + 1100) / 2200), 0, 255) 180 181 #define DIV_FROM_REG(reg) (1 << (reg)) 182 183 #define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \ 184 1310720 / (reg) / DIV_FROM_REG(div)) 185 #define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \ 186 SENSORS_LIMIT((1310720 / (val) / \ 187 DIV_FROM_REG(div)), 1, 254)) 188 189 /* --------------------------------------------------------------------- 190 * Super-I/O constants and functions 191 * --------------------------------------------------------------------- */ 192 193 /* 194 * Configuration index port registers 195 * The vt1211 can live at 2 different addresses so we need to probe both 196 */ 197 #define SIO_REG_CIP1 0x2e 198 #define SIO_REG_CIP2 0x4e 199 200 /* Configuration registers */ 201 #define SIO_VT1211_LDN 0x07 /* logical device number */ 202 #define SIO_VT1211_DEVID 0x20 /* device ID */ 203 #define SIO_VT1211_DEVREV 0x21 /* device revision */ 204 #define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */ 205 #define SIO_VT1211_BADDR 0x60 /* base I/O address */ 206 #define SIO_VT1211_ID 0x3c /* VT1211 device ID */ 207 208 /* VT1211 logical device numbers */ 209 #define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */ 210 211 static inline void superio_outb(int sio_cip, int reg, int val) 212 { 213 outb(reg, sio_cip); 214 outb(val, sio_cip + 1); 215 } 216 217 static inline int superio_inb(int sio_cip, int reg) 218 { 219 outb(reg, sio_cip); 220 return inb(sio_cip + 1); 221 } 222 223 static inline void superio_select(int sio_cip, int ldn) 224 { 225 outb(SIO_VT1211_LDN, sio_cip); 226 outb(ldn, sio_cip + 1); 227 } 228 229 static inline void superio_enter(int sio_cip) 230 { 231 outb(0x87, sio_cip); 232 outb(0x87, sio_cip); 233 } 234 235 static inline void superio_exit(int sio_cip) 236 { 237 outb(0xaa, sio_cip); 238 } 239 240 /* --------------------------------------------------------------------- 241 * Device I/O access 242 * --------------------------------------------------------------------- */ 243 244 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg) 245 { 246 return inb(data->addr + reg); 247 } 248 249 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val) 250 { 251 outb(val, data->addr + reg); 252 } 253 254 static struct vt1211_data *vt1211_update_device(struct device *dev) 255 { 256 struct vt1211_data *data = dev_get_drvdata(dev); 257 int ix, val; 258 259 mutex_lock(&data->update_lock); 260 261 /* registers cache is refreshed after 1 second */ 262 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 263 /* read VID */ 264 data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f; 265 266 /* voltage (in) registers */ 267 for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) { 268 if (ISVOLT(ix, data->uch_config)) { 269 data->in[ix] = vt1211_read8(data, 270 VT1211_REG_IN(ix)); 271 data->in_min[ix] = vt1211_read8(data, 272 VT1211_REG_IN_MIN(ix)); 273 data->in_max[ix] = vt1211_read8(data, 274 VT1211_REG_IN_MAX(ix)); 275 } 276 } 277 278 /* temp registers */ 279 for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) { 280 if (ISTEMP(ix, data->uch_config)) { 281 data->temp[ix] = vt1211_read8(data, 282 regtemp[ix]); 283 data->temp_max[ix] = vt1211_read8(data, 284 regtempmax[ix]); 285 data->temp_hyst[ix] = vt1211_read8(data, 286 regtemphyst[ix]); 287 } 288 } 289 290 /* fan & pwm registers */ 291 for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) { 292 data->fan[ix] = vt1211_read8(data, 293 VT1211_REG_FAN(ix)); 294 data->fan_min[ix] = vt1211_read8(data, 295 VT1211_REG_FAN_MIN(ix)); 296 data->pwm[ix] = vt1211_read8(data, 297 VT1211_REG_PWM(ix)); 298 } 299 val = vt1211_read8(data, VT1211_REG_FAN_DIV); 300 data->fan_div[0] = (val >> 4) & 3; 301 data->fan_div[1] = (val >> 6) & 3; 302 data->fan_ctl = val & 0xf; 303 304 val = vt1211_read8(data, VT1211_REG_PWM_CTL); 305 data->pwm_ctl[0] = val & 0xf; 306 data->pwm_ctl[1] = (val >> 4) & 0xf; 307 308 data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK); 309 310 /* pwm & temp auto point registers */ 311 data->pwm_auto_pwm[0][1] = vt1211_read8(data, 312 VT1211_REG_PWM_AUTO_PWM(0, 1)); 313 data->pwm_auto_pwm[0][2] = vt1211_read8(data, 314 VT1211_REG_PWM_AUTO_PWM(0, 2)); 315 data->pwm_auto_pwm[1][1] = vt1211_read8(data, 316 VT1211_REG_PWM_AUTO_PWM(1, 1)); 317 data->pwm_auto_pwm[1][2] = vt1211_read8(data, 318 VT1211_REG_PWM_AUTO_PWM(1, 2)); 319 for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) { 320 data->pwm_auto_temp[ix] = vt1211_read8(data, 321 VT1211_REG_PWM_AUTO_TEMP(ix)); 322 } 323 324 /* alarm registers */ 325 data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) | 326 vt1211_read8(data, VT1211_REG_ALARM1); 327 328 data->last_updated = jiffies; 329 data->valid = 1; 330 } 331 332 mutex_unlock(&data->update_lock); 333 334 return data; 335 } 336 337 /* --------------------------------------------------------------------- 338 * Voltage sysfs interfaces 339 * ix = [0-5] 340 * --------------------------------------------------------------------- */ 341 342 #define SHOW_IN_INPUT 0 343 #define SHOW_SET_IN_MIN 1 344 #define SHOW_SET_IN_MAX 2 345 #define SHOW_IN_ALARM 3 346 347 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 348 char *buf) 349 { 350 struct vt1211_data *data = vt1211_update_device(dev); 351 struct sensor_device_attribute_2 *sensor_attr_2 = 352 to_sensor_dev_attr_2(attr); 353 int ix = sensor_attr_2->index; 354 int fn = sensor_attr_2->nr; 355 int res; 356 357 switch (fn) { 358 case SHOW_IN_INPUT: 359 res = IN_FROM_REG(ix, data->in[ix]); 360 break; 361 case SHOW_SET_IN_MIN: 362 res = IN_FROM_REG(ix, data->in_min[ix]); 363 break; 364 case SHOW_SET_IN_MAX: 365 res = IN_FROM_REG(ix, data->in_max[ix]); 366 break; 367 case SHOW_IN_ALARM: 368 res = (data->alarms >> bitalarmin[ix]) & 1; 369 break; 370 default: 371 res = 0; 372 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 373 } 374 375 return sprintf(buf, "%d\n", res); 376 } 377 378 static ssize_t set_in(struct device *dev, struct device_attribute *attr, 379 const char *buf, size_t count) 380 { 381 struct vt1211_data *data = dev_get_drvdata(dev); 382 struct sensor_device_attribute_2 *sensor_attr_2 = 383 to_sensor_dev_attr_2(attr); 384 int ix = sensor_attr_2->index; 385 int fn = sensor_attr_2->nr; 386 long val; 387 int err; 388 389 err = kstrtol(buf, 10, &val); 390 if (err) 391 return err; 392 393 mutex_lock(&data->update_lock); 394 switch (fn) { 395 case SHOW_SET_IN_MIN: 396 data->in_min[ix] = IN_TO_REG(ix, val); 397 vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]); 398 break; 399 case SHOW_SET_IN_MAX: 400 data->in_max[ix] = IN_TO_REG(ix, val); 401 vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]); 402 break; 403 default: 404 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 405 } 406 mutex_unlock(&data->update_lock); 407 408 return count; 409 } 410 411 /* --------------------------------------------------------------------- 412 * Temperature sysfs interfaces 413 * ix = [0-6] 414 * --------------------------------------------------------------------- */ 415 416 #define SHOW_TEMP_INPUT 0 417 #define SHOW_SET_TEMP_MAX 1 418 #define SHOW_SET_TEMP_MAX_HYST 2 419 #define SHOW_TEMP_ALARM 3 420 421 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 422 char *buf) 423 { 424 struct vt1211_data *data = vt1211_update_device(dev); 425 struct sensor_device_attribute_2 *sensor_attr_2 = 426 to_sensor_dev_attr_2(attr); 427 int ix = sensor_attr_2->index; 428 int fn = sensor_attr_2->nr; 429 int res; 430 431 switch (fn) { 432 case SHOW_TEMP_INPUT: 433 res = TEMP_FROM_REG(ix, data->temp[ix]); 434 break; 435 case SHOW_SET_TEMP_MAX: 436 res = TEMP_FROM_REG(ix, data->temp_max[ix]); 437 break; 438 case SHOW_SET_TEMP_MAX_HYST: 439 res = TEMP_FROM_REG(ix, data->temp_hyst[ix]); 440 break; 441 case SHOW_TEMP_ALARM: 442 res = (data->alarms >> bitalarmtemp[ix]) & 1; 443 break; 444 default: 445 res = 0; 446 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 447 } 448 449 return sprintf(buf, "%d\n", res); 450 } 451 452 static ssize_t set_temp(struct device *dev, struct device_attribute *attr, 453 const char *buf, size_t count) 454 { 455 struct vt1211_data *data = dev_get_drvdata(dev); 456 struct sensor_device_attribute_2 *sensor_attr_2 = 457 to_sensor_dev_attr_2(attr); 458 int ix = sensor_attr_2->index; 459 int fn = sensor_attr_2->nr; 460 long val; 461 int err; 462 463 err = kstrtol(buf, 10, &val); 464 if (err) 465 return err; 466 467 mutex_lock(&data->update_lock); 468 switch (fn) { 469 case SHOW_SET_TEMP_MAX: 470 data->temp_max[ix] = TEMP_TO_REG(ix, val); 471 vt1211_write8(data, regtempmax[ix], 472 data->temp_max[ix]); 473 break; 474 case SHOW_SET_TEMP_MAX_HYST: 475 data->temp_hyst[ix] = TEMP_TO_REG(ix, val); 476 vt1211_write8(data, regtemphyst[ix], 477 data->temp_hyst[ix]); 478 break; 479 default: 480 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 481 } 482 mutex_unlock(&data->update_lock); 483 484 return count; 485 } 486 487 /* --------------------------------------------------------------------- 488 * Fan sysfs interfaces 489 * ix = [0-1] 490 * --------------------------------------------------------------------- */ 491 492 #define SHOW_FAN_INPUT 0 493 #define SHOW_SET_FAN_MIN 1 494 #define SHOW_SET_FAN_DIV 2 495 #define SHOW_FAN_ALARM 3 496 497 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 498 char *buf) 499 { 500 struct vt1211_data *data = vt1211_update_device(dev); 501 struct sensor_device_attribute_2 *sensor_attr_2 = 502 to_sensor_dev_attr_2(attr); 503 int ix = sensor_attr_2->index; 504 int fn = sensor_attr_2->nr; 505 int res; 506 507 switch (fn) { 508 case SHOW_FAN_INPUT: 509 res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]); 510 break; 511 case SHOW_SET_FAN_MIN: 512 res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]); 513 break; 514 case SHOW_SET_FAN_DIV: 515 res = DIV_FROM_REG(data->fan_div[ix]); 516 break; 517 case SHOW_FAN_ALARM: 518 res = (data->alarms >> bitalarmfan[ix]) & 1; 519 break; 520 default: 521 res = 0; 522 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 523 } 524 525 return sprintf(buf, "%d\n", res); 526 } 527 528 static ssize_t set_fan(struct device *dev, struct device_attribute *attr, 529 const char *buf, size_t count) 530 { 531 struct vt1211_data *data = dev_get_drvdata(dev); 532 struct sensor_device_attribute_2 *sensor_attr_2 = 533 to_sensor_dev_attr_2(attr); 534 int ix = sensor_attr_2->index; 535 int fn = sensor_attr_2->nr; 536 int reg; 537 unsigned long val; 538 int err; 539 540 err = kstrtoul(buf, 10, &val); 541 if (err) 542 return err; 543 544 mutex_lock(&data->update_lock); 545 546 /* sync the data cache */ 547 reg = vt1211_read8(data, VT1211_REG_FAN_DIV); 548 data->fan_div[0] = (reg >> 4) & 3; 549 data->fan_div[1] = (reg >> 6) & 3; 550 data->fan_ctl = reg & 0xf; 551 552 switch (fn) { 553 case SHOW_SET_FAN_MIN: 554 data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]); 555 vt1211_write8(data, VT1211_REG_FAN_MIN(ix), 556 data->fan_min[ix]); 557 break; 558 case SHOW_SET_FAN_DIV: 559 switch (val) { 560 case 1: 561 data->fan_div[ix] = 0; 562 break; 563 case 2: 564 data->fan_div[ix] = 1; 565 break; 566 case 4: 567 data->fan_div[ix] = 2; 568 break; 569 case 8: 570 data->fan_div[ix] = 3; 571 break; 572 default: 573 count = -EINVAL; 574 dev_warn(dev, "fan div value %ld not supported. " 575 "Choose one of 1, 2, 4, or 8.\n", val); 576 goto EXIT; 577 } 578 vt1211_write8(data, VT1211_REG_FAN_DIV, 579 ((data->fan_div[1] << 6) | 580 (data->fan_div[0] << 4) | 581 data->fan_ctl)); 582 break; 583 default: 584 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 585 } 586 587 EXIT: 588 mutex_unlock(&data->update_lock); 589 return count; 590 } 591 592 /* --------------------------------------------------------------------- 593 * PWM sysfs interfaces 594 * ix = [0-1] 595 * --------------------------------------------------------------------- */ 596 597 #define SHOW_PWM 0 598 #define SHOW_SET_PWM_ENABLE 1 599 #define SHOW_SET_PWM_FREQ 2 600 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3 601 602 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 603 char *buf) 604 { 605 struct vt1211_data *data = vt1211_update_device(dev); 606 struct sensor_device_attribute_2 *sensor_attr_2 = 607 to_sensor_dev_attr_2(attr); 608 int ix = sensor_attr_2->index; 609 int fn = sensor_attr_2->nr; 610 int res; 611 612 switch (fn) { 613 case SHOW_PWM: 614 res = data->pwm[ix]; 615 break; 616 case SHOW_SET_PWM_ENABLE: 617 res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0; 618 break; 619 case SHOW_SET_PWM_FREQ: 620 res = 90000 >> (data->pwm_clk & 7); 621 break; 622 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: 623 res = (data->pwm_ctl[ix] & 7) + 1; 624 break; 625 default: 626 res = 0; 627 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 628 } 629 630 return sprintf(buf, "%d\n", res); 631 } 632 633 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 634 const char *buf, size_t count) 635 { 636 struct vt1211_data *data = dev_get_drvdata(dev); 637 struct sensor_device_attribute_2 *sensor_attr_2 = 638 to_sensor_dev_attr_2(attr); 639 int ix = sensor_attr_2->index; 640 int fn = sensor_attr_2->nr; 641 int tmp, reg; 642 unsigned long val; 643 int err; 644 645 err = kstrtoul(buf, 10, &val); 646 if (err) 647 return err; 648 649 mutex_lock(&data->update_lock); 650 651 switch (fn) { 652 case SHOW_SET_PWM_ENABLE: 653 /* sync the data cache */ 654 reg = vt1211_read8(data, VT1211_REG_FAN_DIV); 655 data->fan_div[0] = (reg >> 4) & 3; 656 data->fan_div[1] = (reg >> 6) & 3; 657 data->fan_ctl = reg & 0xf; 658 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 659 data->pwm_ctl[0] = reg & 0xf; 660 data->pwm_ctl[1] = (reg >> 4) & 0xf; 661 switch (val) { 662 case 0: 663 data->pwm_ctl[ix] &= 7; 664 /* 665 * disable SmartGuardian if both PWM outputs are 666 * disabled 667 */ 668 if ((data->pwm_ctl[ix ^ 1] & 1) == 0) 669 data->fan_ctl &= 0xe; 670 break; 671 case 2: 672 data->pwm_ctl[ix] |= 8; 673 data->fan_ctl |= 1; 674 break; 675 default: 676 count = -EINVAL; 677 dev_warn(dev, "pwm mode %ld not supported. " 678 "Choose one of 0 or 2.\n", val); 679 goto EXIT; 680 } 681 vt1211_write8(data, VT1211_REG_PWM_CTL, 682 ((data->pwm_ctl[1] << 4) | 683 data->pwm_ctl[0])); 684 vt1211_write8(data, VT1211_REG_FAN_DIV, 685 ((data->fan_div[1] << 6) | 686 (data->fan_div[0] << 4) | 687 data->fan_ctl)); 688 break; 689 case SHOW_SET_PWM_FREQ: 690 val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000); 691 /* calculate tmp = log2(val) */ 692 tmp = 0; 693 for (val >>= 1; val > 0; val >>= 1) 694 tmp++; 695 /* sync the data cache */ 696 reg = vt1211_read8(data, VT1211_REG_PWM_CLK); 697 data->pwm_clk = (reg & 0xf8) | tmp; 698 vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk); 699 break; 700 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: 701 if (val < 1 || val > 7) { 702 count = -EINVAL; 703 dev_warn(dev, "temp channel %ld not supported. " 704 "Choose a value between 1 and 7.\n", val); 705 goto EXIT; 706 } 707 if (!ISTEMP(val - 1, data->uch_config)) { 708 count = -EINVAL; 709 dev_warn(dev, "temp channel %ld is not available.\n", 710 val); 711 goto EXIT; 712 } 713 /* sync the data cache */ 714 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 715 data->pwm_ctl[0] = reg & 0xf; 716 data->pwm_ctl[1] = (reg >> 4) & 0xf; 717 data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1); 718 vt1211_write8(data, VT1211_REG_PWM_CTL, 719 ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0])); 720 break; 721 default: 722 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 723 } 724 725 EXIT: 726 mutex_unlock(&data->update_lock); 727 return count; 728 } 729 730 /* --------------------------------------------------------------------- 731 * PWM auto point definitions 732 * ix = [0-1] 733 * ap = [0-3] 734 * --------------------------------------------------------------------- */ 735 736 /* 737 * pwm[ix+1]_auto_point[ap+1]_temp mapping table: 738 * Note that there is only a single set of temp auto points that controls both 739 * PWM controllers. We still create 2 sets of sysfs files to make it look 740 * more consistent even though they map to the same registers. 741 * 742 * ix ap : description 743 * ------------------- 744 * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0]) 745 * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) 746 * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) 747 * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) 748 * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0]) 749 * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) 750 * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) 751 * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) 752 */ 753 754 static ssize_t show_pwm_auto_point_temp(struct device *dev, 755 struct device_attribute *attr, 756 char *buf) 757 { 758 struct vt1211_data *data = vt1211_update_device(dev); 759 struct sensor_device_attribute_2 *sensor_attr_2 = 760 to_sensor_dev_attr_2(attr); 761 int ix = sensor_attr_2->index; 762 int ap = sensor_attr_2->nr; 763 764 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7, 765 data->pwm_auto_temp[ap])); 766 } 767 768 static ssize_t set_pwm_auto_point_temp(struct device *dev, 769 struct device_attribute *attr, 770 const char *buf, size_t count) 771 { 772 struct vt1211_data *data = dev_get_drvdata(dev); 773 struct sensor_device_attribute_2 *sensor_attr_2 = 774 to_sensor_dev_attr_2(attr); 775 int ix = sensor_attr_2->index; 776 int ap = sensor_attr_2->nr; 777 int reg; 778 long val; 779 int err; 780 781 err = kstrtol(buf, 10, &val); 782 if (err) 783 return err; 784 785 786 mutex_lock(&data->update_lock); 787 788 /* sync the data cache */ 789 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 790 data->pwm_ctl[0] = reg & 0xf; 791 data->pwm_ctl[1] = (reg >> 4) & 0xf; 792 793 data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val); 794 vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap), 795 data->pwm_auto_temp[ap]); 796 mutex_unlock(&data->update_lock); 797 798 return count; 799 } 800 801 /* 802 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table: 803 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't 804 * be changed. 805 * 806 * ix ap : description 807 * ------------------- 808 * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0) 809 * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1]) 810 * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2]) 811 * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255) 812 * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0) 813 * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1]) 814 * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2]) 815 * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255) 816 */ 817 818 static ssize_t show_pwm_auto_point_pwm(struct device *dev, 819 struct device_attribute *attr, 820 char *buf) 821 { 822 struct vt1211_data *data = vt1211_update_device(dev); 823 struct sensor_device_attribute_2 *sensor_attr_2 = 824 to_sensor_dev_attr_2(attr); 825 int ix = sensor_attr_2->index; 826 int ap = sensor_attr_2->nr; 827 828 return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]); 829 } 830 831 static ssize_t set_pwm_auto_point_pwm(struct device *dev, 832 struct device_attribute *attr, 833 const char *buf, size_t count) 834 { 835 struct vt1211_data *data = dev_get_drvdata(dev); 836 struct sensor_device_attribute_2 *sensor_attr_2 = 837 to_sensor_dev_attr_2(attr); 838 int ix = sensor_attr_2->index; 839 int ap = sensor_attr_2->nr; 840 unsigned long val; 841 int err; 842 843 err = kstrtoul(buf, 10, &val); 844 if (err) 845 return err; 846 847 mutex_lock(&data->update_lock); 848 data->pwm_auto_pwm[ix][ap] = SENSORS_LIMIT(val, 0, 255); 849 vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap), 850 data->pwm_auto_pwm[ix][ap]); 851 mutex_unlock(&data->update_lock); 852 853 return count; 854 } 855 856 /* --------------------------------------------------------------------- 857 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms) 858 * --------------------------------------------------------------------- */ 859 860 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 861 char *buf) 862 { 863 struct vt1211_data *data = dev_get_drvdata(dev); 864 865 return sprintf(buf, "%d\n", data->vrm); 866 } 867 868 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 869 const char *buf, size_t count) 870 { 871 struct vt1211_data *data = dev_get_drvdata(dev); 872 unsigned long val; 873 int err; 874 875 err = kstrtoul(buf, 10, &val); 876 if (err) 877 return err; 878 879 data->vrm = val; 880 881 return count; 882 } 883 884 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 885 char *buf) 886 { 887 struct vt1211_data *data = dev_get_drvdata(dev); 888 889 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 890 } 891 892 static ssize_t show_name(struct device *dev, 893 struct device_attribute *attr, char *buf) 894 { 895 struct vt1211_data *data = dev_get_drvdata(dev); 896 897 return sprintf(buf, "%s\n", data->name); 898 } 899 900 static ssize_t show_alarms(struct device *dev, 901 struct device_attribute *attr, char *buf) 902 { 903 struct vt1211_data *data = vt1211_update_device(dev); 904 905 return sprintf(buf, "%d\n", data->alarms); 906 } 907 908 /* --------------------------------------------------------------------- 909 * Device attribute structs 910 * --------------------------------------------------------------------- */ 911 912 #define SENSOR_ATTR_IN(ix) \ 913 { SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \ 914 show_in, NULL, SHOW_IN_INPUT, ix), \ 915 SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \ 916 show_in, set_in, SHOW_SET_IN_MIN, ix), \ 917 SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \ 918 show_in, set_in, SHOW_SET_IN_MAX, ix), \ 919 SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \ 920 show_in, NULL, SHOW_IN_ALARM, ix) \ 921 } 922 923 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = { 924 SENSOR_ATTR_IN(0), 925 SENSOR_ATTR_IN(1), 926 SENSOR_ATTR_IN(2), 927 SENSOR_ATTR_IN(3), 928 SENSOR_ATTR_IN(4), 929 SENSOR_ATTR_IN(5) 930 }; 931 932 #define IN_UNIT_ATTRS(X) \ 933 { &vt1211_sysfs_in[X][0].dev_attr.attr, \ 934 &vt1211_sysfs_in[X][1].dev_attr.attr, \ 935 &vt1211_sysfs_in[X][2].dev_attr.attr, \ 936 &vt1211_sysfs_in[X][3].dev_attr.attr, \ 937 NULL \ 938 } 939 940 static struct attribute *vt1211_in_attr[][5] = { 941 IN_UNIT_ATTRS(0), 942 IN_UNIT_ATTRS(1), 943 IN_UNIT_ATTRS(2), 944 IN_UNIT_ATTRS(3), 945 IN_UNIT_ATTRS(4), 946 IN_UNIT_ATTRS(5) 947 }; 948 949 static const struct attribute_group vt1211_in_attr_group[] = { 950 { .attrs = vt1211_in_attr[0] }, 951 { .attrs = vt1211_in_attr[1] }, 952 { .attrs = vt1211_in_attr[2] }, 953 { .attrs = vt1211_in_attr[3] }, 954 { .attrs = vt1211_in_attr[4] }, 955 { .attrs = vt1211_in_attr[5] } 956 }; 957 958 #define SENSOR_ATTR_TEMP(ix) \ 959 { SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \ 960 show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \ 961 SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \ 962 show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \ 963 SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \ 964 show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \ 965 SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \ 966 show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \ 967 } 968 969 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = { 970 SENSOR_ATTR_TEMP(1), 971 SENSOR_ATTR_TEMP(2), 972 SENSOR_ATTR_TEMP(3), 973 SENSOR_ATTR_TEMP(4), 974 SENSOR_ATTR_TEMP(5), 975 SENSOR_ATTR_TEMP(6), 976 SENSOR_ATTR_TEMP(7), 977 }; 978 979 #define TEMP_UNIT_ATTRS(X) \ 980 { &vt1211_sysfs_temp[X][0].dev_attr.attr, \ 981 &vt1211_sysfs_temp[X][1].dev_attr.attr, \ 982 &vt1211_sysfs_temp[X][2].dev_attr.attr, \ 983 &vt1211_sysfs_temp[X][3].dev_attr.attr, \ 984 NULL \ 985 } 986 987 static struct attribute *vt1211_temp_attr[][5] = { 988 TEMP_UNIT_ATTRS(0), 989 TEMP_UNIT_ATTRS(1), 990 TEMP_UNIT_ATTRS(2), 991 TEMP_UNIT_ATTRS(3), 992 TEMP_UNIT_ATTRS(4), 993 TEMP_UNIT_ATTRS(5), 994 TEMP_UNIT_ATTRS(6) 995 }; 996 997 static const struct attribute_group vt1211_temp_attr_group[] = { 998 { .attrs = vt1211_temp_attr[0] }, 999 { .attrs = vt1211_temp_attr[1] }, 1000 { .attrs = vt1211_temp_attr[2] }, 1001 { .attrs = vt1211_temp_attr[3] }, 1002 { .attrs = vt1211_temp_attr[4] }, 1003 { .attrs = vt1211_temp_attr[5] }, 1004 { .attrs = vt1211_temp_attr[6] } 1005 }; 1006 1007 #define SENSOR_ATTR_FAN(ix) \ 1008 SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \ 1009 show_fan, NULL, SHOW_FAN_INPUT, ix-1), \ 1010 SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \ 1011 show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \ 1012 SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \ 1013 show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \ 1014 SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \ 1015 show_fan, NULL, SHOW_FAN_ALARM, ix-1) 1016 1017 #define SENSOR_ATTR_PWM(ix) \ 1018 SENSOR_ATTR_2(pwm##ix, S_IRUGO, \ 1019 show_pwm, NULL, SHOW_PWM, ix-1), \ 1020 SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \ 1021 show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \ 1022 SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \ 1023 show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1) 1024 1025 #define SENSOR_ATTR_PWM_FREQ(ix) \ 1026 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \ 1027 show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1) 1028 1029 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \ 1030 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \ 1031 show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1) 1032 1033 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \ 1034 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \ 1035 show_pwm_auto_point_temp, set_pwm_auto_point_temp, \ 1036 ap-1, ix-1) 1037 1038 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \ 1039 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \ 1040 show_pwm_auto_point_temp, NULL, \ 1041 ap-1, ix-1) 1042 1043 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \ 1044 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \ 1045 show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \ 1046 ap-1, ix-1) 1047 1048 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \ 1049 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \ 1050 show_pwm_auto_point_pwm, NULL, \ 1051 ap-1, ix-1) 1052 1053 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = { 1054 SENSOR_ATTR_FAN(1), 1055 SENSOR_ATTR_FAN(2), 1056 SENSOR_ATTR_PWM(1), 1057 SENSOR_ATTR_PWM(2), 1058 SENSOR_ATTR_PWM_FREQ(1), 1059 SENSOR_ATTR_PWM_FREQ_RO(2), 1060 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1), 1061 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2), 1062 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3), 1063 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4), 1064 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1), 1065 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2), 1066 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3), 1067 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4), 1068 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1), 1069 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2), 1070 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3), 1071 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4), 1072 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1), 1073 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2), 1074 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3), 1075 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4), 1076 }; 1077 1078 static struct device_attribute vt1211_sysfs_misc[] = { 1079 __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm), 1080 __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL), 1081 __ATTR(name, S_IRUGO, show_name, NULL), 1082 __ATTR(alarms, S_IRUGO, show_alarms, NULL), 1083 }; 1084 1085 /* --------------------------------------------------------------------- 1086 * Device registration and initialization 1087 * --------------------------------------------------------------------- */ 1088 1089 static void vt1211_init_device(struct vt1211_data *data) 1090 { 1091 /* set VRM */ 1092 data->vrm = vid_which_vrm(); 1093 1094 /* Read (and initialize) UCH config */ 1095 data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG); 1096 if (uch_config > -1) { 1097 data->uch_config = (data->uch_config & 0x83) | 1098 (uch_config << 2); 1099 vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config); 1100 } 1101 1102 /* 1103 * Initialize the interrupt mode (if request at module load time). 1104 * The VT1211 implements 3 different modes for clearing interrupts: 1105 * 0: Clear INT when status register is read. Regenerate INT as long 1106 * as temp stays above hysteresis limit. 1107 * 1: Clear INT when status register is read. DON'T regenerate INT 1108 * until temp falls below hysteresis limit and exceeds hot limit 1109 * again. 1110 * 2: Clear INT when temp falls below max limit. 1111 * 1112 * The driver only allows to force mode 0 since that's the only one 1113 * that makes sense for 'sensors' 1114 */ 1115 if (int_mode == 0) { 1116 vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0); 1117 vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0); 1118 } 1119 1120 /* Fill in some hard wired values into our data struct */ 1121 data->pwm_auto_pwm[0][3] = 255; 1122 data->pwm_auto_pwm[1][3] = 255; 1123 } 1124 1125 static void vt1211_remove_sysfs(struct platform_device *pdev) 1126 { 1127 struct device *dev = &pdev->dev; 1128 int i; 1129 1130 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) 1131 sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]); 1132 1133 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) 1134 sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]); 1135 1136 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { 1137 device_remove_file(dev, 1138 &vt1211_sysfs_fan_pwm[i].dev_attr); 1139 } 1140 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) 1141 device_remove_file(dev, &vt1211_sysfs_misc[i]); 1142 } 1143 1144 static int vt1211_probe(struct platform_device *pdev) 1145 { 1146 struct device *dev = &pdev->dev; 1147 struct vt1211_data *data; 1148 struct resource *res; 1149 int i, err; 1150 1151 data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL); 1152 if (!data) { 1153 dev_err(dev, "Out of memory\n"); 1154 return -ENOMEM; 1155 } 1156 1157 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1158 if (!devm_request_region(dev, res->start, resource_size(res), 1159 DRVNAME)) { 1160 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1161 (unsigned long)res->start, (unsigned long)res->end); 1162 return -EBUSY; 1163 } 1164 data->addr = res->start; 1165 data->name = DRVNAME; 1166 mutex_init(&data->update_lock); 1167 1168 platform_set_drvdata(pdev, data); 1169 1170 /* Initialize the VT1211 chip */ 1171 vt1211_init_device(data); 1172 1173 /* Create sysfs interface files */ 1174 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) { 1175 if (ISVOLT(i, data->uch_config)) { 1176 err = sysfs_create_group(&dev->kobj, 1177 &vt1211_in_attr_group[i]); 1178 if (err) 1179 goto EXIT_DEV_REMOVE; 1180 } 1181 } 1182 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) { 1183 if (ISTEMP(i, data->uch_config)) { 1184 err = sysfs_create_group(&dev->kobj, 1185 &vt1211_temp_attr_group[i]); 1186 if (err) 1187 goto EXIT_DEV_REMOVE; 1188 } 1189 } 1190 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { 1191 err = device_create_file(dev, 1192 &vt1211_sysfs_fan_pwm[i].dev_attr); 1193 if (err) 1194 goto EXIT_DEV_REMOVE; 1195 } 1196 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) { 1197 err = device_create_file(dev, 1198 &vt1211_sysfs_misc[i]); 1199 if (err) 1200 goto EXIT_DEV_REMOVE; 1201 } 1202 1203 /* Register device */ 1204 data->hwmon_dev = hwmon_device_register(dev); 1205 if (IS_ERR(data->hwmon_dev)) { 1206 err = PTR_ERR(data->hwmon_dev); 1207 dev_err(dev, "Class registration failed (%d)\n", err); 1208 goto EXIT_DEV_REMOVE_SILENT; 1209 } 1210 1211 return 0; 1212 1213 EXIT_DEV_REMOVE: 1214 dev_err(dev, "Sysfs interface creation failed (%d)\n", err); 1215 EXIT_DEV_REMOVE_SILENT: 1216 vt1211_remove_sysfs(pdev); 1217 return err; 1218 } 1219 1220 static int vt1211_remove(struct platform_device *pdev) 1221 { 1222 struct vt1211_data *data = platform_get_drvdata(pdev); 1223 1224 hwmon_device_unregister(data->hwmon_dev); 1225 vt1211_remove_sysfs(pdev); 1226 1227 return 0; 1228 } 1229 1230 static struct platform_driver vt1211_driver = { 1231 .driver = { 1232 .owner = THIS_MODULE, 1233 .name = DRVNAME, 1234 }, 1235 .probe = vt1211_probe, 1236 .remove = vt1211_remove, 1237 }; 1238 1239 static int __init vt1211_device_add(unsigned short address) 1240 { 1241 struct resource res = { 1242 .start = address, 1243 .end = address + 0x7f, 1244 .flags = IORESOURCE_IO, 1245 }; 1246 int err; 1247 1248 pdev = platform_device_alloc(DRVNAME, address); 1249 if (!pdev) { 1250 err = -ENOMEM; 1251 pr_err("Device allocation failed (%d)\n", err); 1252 goto EXIT; 1253 } 1254 1255 res.name = pdev->name; 1256 err = acpi_check_resource_conflict(&res); 1257 if (err) 1258 goto EXIT_DEV_PUT; 1259 1260 err = platform_device_add_resources(pdev, &res, 1); 1261 if (err) { 1262 pr_err("Device resource addition failed (%d)\n", err); 1263 goto EXIT_DEV_PUT; 1264 } 1265 1266 err = platform_device_add(pdev); 1267 if (err) { 1268 pr_err("Device addition failed (%d)\n", err); 1269 goto EXIT_DEV_PUT; 1270 } 1271 1272 return 0; 1273 1274 EXIT_DEV_PUT: 1275 platform_device_put(pdev); 1276 EXIT: 1277 return err; 1278 } 1279 1280 static int __init vt1211_find(int sio_cip, unsigned short *address) 1281 { 1282 int err = -ENODEV; 1283 int devid; 1284 1285 superio_enter(sio_cip); 1286 1287 devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID); 1288 if (devid != SIO_VT1211_ID) 1289 goto EXIT; 1290 1291 superio_select(sio_cip, SIO_VT1211_LDN_HWMON); 1292 1293 if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) { 1294 pr_warn("HW monitor is disabled, skipping\n"); 1295 goto EXIT; 1296 } 1297 1298 *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) | 1299 (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00; 1300 if (*address == 0) { 1301 pr_warn("Base address is not set, skipping\n"); 1302 goto EXIT; 1303 } 1304 1305 err = 0; 1306 pr_info("Found VT1211 chip at 0x%04x, revision %u\n", 1307 *address, superio_inb(sio_cip, SIO_VT1211_DEVREV)); 1308 1309 EXIT: 1310 superio_exit(sio_cip); 1311 return err; 1312 } 1313 1314 static int __init vt1211_init(void) 1315 { 1316 int err; 1317 unsigned short address = 0; 1318 1319 err = vt1211_find(SIO_REG_CIP1, &address); 1320 if (err) { 1321 err = vt1211_find(SIO_REG_CIP2, &address); 1322 if (err) 1323 goto EXIT; 1324 } 1325 1326 if ((uch_config < -1) || (uch_config > 31)) { 1327 err = -EINVAL; 1328 pr_warn("Invalid UCH configuration %d. " 1329 "Choose a value between 0 and 31.\n", uch_config); 1330 goto EXIT; 1331 } 1332 1333 if ((int_mode < -1) || (int_mode > 0)) { 1334 err = -EINVAL; 1335 pr_warn("Invalid interrupt mode %d. " 1336 "Only mode 0 is supported.\n", int_mode); 1337 goto EXIT; 1338 } 1339 1340 err = platform_driver_register(&vt1211_driver); 1341 if (err) 1342 goto EXIT; 1343 1344 /* Sets global pdev as a side effect */ 1345 err = vt1211_device_add(address); 1346 if (err) 1347 goto EXIT_DRV_UNREGISTER; 1348 1349 return 0; 1350 1351 EXIT_DRV_UNREGISTER: 1352 platform_driver_unregister(&vt1211_driver); 1353 EXIT: 1354 return err; 1355 } 1356 1357 static void __exit vt1211_exit(void) 1358 { 1359 platform_device_unregister(pdev); 1360 platform_driver_unregister(&vt1211_driver); 1361 } 1362 1363 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>"); 1364 MODULE_DESCRIPTION("VT1211 sensors"); 1365 MODULE_LICENSE("GPL"); 1366 1367 module_init(vt1211_init); 1368 module_exit(vt1211_exit); 1369