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 /* in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the 155 driver according to the VT1211 BIOS porting guide */ 156 #define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \ 157 (((reg) - 3) * 15882 + 479) / 958 : \ 158 (((reg) - 3) * 10000 + 479) / 958) 159 #define IN_TO_REG(ix, val) (SENSORS_LIMIT((ix) == 5 ? \ 160 ((val) * 958 + 7941) / 15882 + 3 : \ 161 ((val) * 958 + 5000) / 10000 + 3, 0, 255)) 162 163 /* temp1 (ix = 0) is an intel thermal diode which is scaled in user space. 164 temp2 (ix = 1) is the internal temp diode so it's scaled in the driver 165 according to some measurements that I took on an EPIA M10000. 166 temp3-7 are thermistor based so the driver returns the voltage measured at 167 the pin (range 0V - 2.2V). */ 168 #define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \ 169 (ix) == 1 ? (reg) < 51 ? 0 : \ 170 ((reg) - 51) * 1000 : \ 171 ((253 - (reg)) * 2200 + 105) / 210) 172 #define TEMP_TO_REG(ix, val) SENSORS_LIMIT( \ 173 ((ix) == 0 ? ((val) + 500) / 1000 : \ 174 (ix) == 1 ? ((val) + 500) / 1000 + 51 : \ 175 253 - ((val) * 210 + 1100) / 2200), 0, 255) 176 177 #define DIV_FROM_REG(reg) (1 << (reg)) 178 179 #define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \ 180 1310720 / (reg) / DIV_FROM_REG(div)) 181 #define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \ 182 SENSORS_LIMIT((1310720 / (val) / \ 183 DIV_FROM_REG(div)), 1, 254)) 184 185 /* --------------------------------------------------------------------- 186 * Super-I/O constants and functions 187 * --------------------------------------------------------------------- */ 188 189 /* Configuration index port registers 190 * The vt1211 can live at 2 different addresses so we need to probe both */ 191 #define SIO_REG_CIP1 0x2e 192 #define SIO_REG_CIP2 0x4e 193 194 /* Configuration registers */ 195 #define SIO_VT1211_LDN 0x07 /* logical device number */ 196 #define SIO_VT1211_DEVID 0x20 /* device ID */ 197 #define SIO_VT1211_DEVREV 0x21 /* device revision */ 198 #define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */ 199 #define SIO_VT1211_BADDR 0x60 /* base I/O address */ 200 #define SIO_VT1211_ID 0x3c /* VT1211 device ID */ 201 202 /* VT1211 logical device numbers */ 203 #define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */ 204 205 static inline void superio_outb(int sio_cip, int reg, int val) 206 { 207 outb(reg, sio_cip); 208 outb(val, sio_cip + 1); 209 } 210 211 static inline int superio_inb(int sio_cip, int reg) 212 { 213 outb(reg, sio_cip); 214 return inb(sio_cip + 1); 215 } 216 217 static inline void superio_select(int sio_cip, int ldn) 218 { 219 outb(SIO_VT1211_LDN, sio_cip); 220 outb(ldn, sio_cip + 1); 221 } 222 223 static inline void superio_enter(int sio_cip) 224 { 225 outb(0x87, sio_cip); 226 outb(0x87, sio_cip); 227 } 228 229 static inline void superio_exit(int sio_cip) 230 { 231 outb(0xaa, sio_cip); 232 } 233 234 /* --------------------------------------------------------------------- 235 * Device I/O access 236 * --------------------------------------------------------------------- */ 237 238 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg) 239 { 240 return inb(data->addr + reg); 241 } 242 243 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val) 244 { 245 outb(val, data->addr + reg); 246 } 247 248 static struct vt1211_data *vt1211_update_device(struct device *dev) 249 { 250 struct vt1211_data *data = dev_get_drvdata(dev); 251 int ix, val; 252 253 mutex_lock(&data->update_lock); 254 255 /* registers cache is refreshed after 1 second */ 256 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 257 /* read VID */ 258 data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f; 259 260 /* voltage (in) registers */ 261 for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) { 262 if (ISVOLT(ix, data->uch_config)) { 263 data->in[ix] = vt1211_read8(data, 264 VT1211_REG_IN(ix)); 265 data->in_min[ix] = vt1211_read8(data, 266 VT1211_REG_IN_MIN(ix)); 267 data->in_max[ix] = vt1211_read8(data, 268 VT1211_REG_IN_MAX(ix)); 269 } 270 } 271 272 /* temp registers */ 273 for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) { 274 if (ISTEMP(ix, data->uch_config)) { 275 data->temp[ix] = vt1211_read8(data, 276 regtemp[ix]); 277 data->temp_max[ix] = vt1211_read8(data, 278 regtempmax[ix]); 279 data->temp_hyst[ix] = vt1211_read8(data, 280 regtemphyst[ix]); 281 } 282 } 283 284 /* fan & pwm registers */ 285 for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) { 286 data->fan[ix] = vt1211_read8(data, 287 VT1211_REG_FAN(ix)); 288 data->fan_min[ix] = vt1211_read8(data, 289 VT1211_REG_FAN_MIN(ix)); 290 data->pwm[ix] = vt1211_read8(data, 291 VT1211_REG_PWM(ix)); 292 } 293 val = vt1211_read8(data, VT1211_REG_FAN_DIV); 294 data->fan_div[0] = (val >> 4) & 3; 295 data->fan_div[1] = (val >> 6) & 3; 296 data->fan_ctl = val & 0xf; 297 298 val = vt1211_read8(data, VT1211_REG_PWM_CTL); 299 data->pwm_ctl[0] = val & 0xf; 300 data->pwm_ctl[1] = (val >> 4) & 0xf; 301 302 data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK); 303 304 /* pwm & temp auto point registers */ 305 data->pwm_auto_pwm[0][1] = vt1211_read8(data, 306 VT1211_REG_PWM_AUTO_PWM(0, 1)); 307 data->pwm_auto_pwm[0][2] = vt1211_read8(data, 308 VT1211_REG_PWM_AUTO_PWM(0, 2)); 309 data->pwm_auto_pwm[1][1] = vt1211_read8(data, 310 VT1211_REG_PWM_AUTO_PWM(1, 1)); 311 data->pwm_auto_pwm[1][2] = vt1211_read8(data, 312 VT1211_REG_PWM_AUTO_PWM(1, 2)); 313 for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) { 314 data->pwm_auto_temp[ix] = vt1211_read8(data, 315 VT1211_REG_PWM_AUTO_TEMP(ix)); 316 } 317 318 /* alarm registers */ 319 data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) | 320 vt1211_read8(data, VT1211_REG_ALARM1); 321 322 data->last_updated = jiffies; 323 data->valid = 1; 324 } 325 326 mutex_unlock(&data->update_lock); 327 328 return data; 329 } 330 331 /* --------------------------------------------------------------------- 332 * Voltage sysfs interfaces 333 * ix = [0-5] 334 * --------------------------------------------------------------------- */ 335 336 #define SHOW_IN_INPUT 0 337 #define SHOW_SET_IN_MIN 1 338 #define SHOW_SET_IN_MAX 2 339 #define SHOW_IN_ALARM 3 340 341 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 342 char *buf) 343 { 344 struct vt1211_data *data = vt1211_update_device(dev); 345 struct sensor_device_attribute_2 *sensor_attr_2 = 346 to_sensor_dev_attr_2(attr); 347 int ix = sensor_attr_2->index; 348 int fn = sensor_attr_2->nr; 349 int res; 350 351 switch (fn) { 352 case SHOW_IN_INPUT: 353 res = IN_FROM_REG(ix, data->in[ix]); 354 break; 355 case SHOW_SET_IN_MIN: 356 res = IN_FROM_REG(ix, data->in_min[ix]); 357 break; 358 case SHOW_SET_IN_MAX: 359 res = IN_FROM_REG(ix, data->in_max[ix]); 360 break; 361 case SHOW_IN_ALARM: 362 res = (data->alarms >> bitalarmin[ix]) & 1; 363 break; 364 default: 365 res = 0; 366 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 367 } 368 369 return sprintf(buf, "%d\n", res); 370 } 371 372 static ssize_t set_in(struct device *dev, struct device_attribute *attr, 373 const char *buf, size_t count) 374 { 375 struct vt1211_data *data = dev_get_drvdata(dev); 376 struct sensor_device_attribute_2 *sensor_attr_2 = 377 to_sensor_dev_attr_2(attr); 378 int ix = sensor_attr_2->index; 379 int fn = sensor_attr_2->nr; 380 long val = simple_strtol(buf, NULL, 10); 381 382 mutex_lock(&data->update_lock); 383 switch (fn) { 384 case SHOW_SET_IN_MIN: 385 data->in_min[ix] = IN_TO_REG(ix, val); 386 vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]); 387 break; 388 case SHOW_SET_IN_MAX: 389 data->in_max[ix] = IN_TO_REG(ix, val); 390 vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]); 391 break; 392 default: 393 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 394 } 395 mutex_unlock(&data->update_lock); 396 397 return count; 398 } 399 400 /* --------------------------------------------------------------------- 401 * Temperature sysfs interfaces 402 * ix = [0-6] 403 * --------------------------------------------------------------------- */ 404 405 #define SHOW_TEMP_INPUT 0 406 #define SHOW_SET_TEMP_MAX 1 407 #define SHOW_SET_TEMP_MAX_HYST 2 408 #define SHOW_TEMP_ALARM 3 409 410 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 411 char *buf) 412 { 413 struct vt1211_data *data = vt1211_update_device(dev); 414 struct sensor_device_attribute_2 *sensor_attr_2 = 415 to_sensor_dev_attr_2(attr); 416 int ix = sensor_attr_2->index; 417 int fn = sensor_attr_2->nr; 418 int res; 419 420 switch (fn) { 421 case SHOW_TEMP_INPUT: 422 res = TEMP_FROM_REG(ix, data->temp[ix]); 423 break; 424 case SHOW_SET_TEMP_MAX: 425 res = TEMP_FROM_REG(ix, data->temp_max[ix]); 426 break; 427 case SHOW_SET_TEMP_MAX_HYST: 428 res = TEMP_FROM_REG(ix, data->temp_hyst[ix]); 429 break; 430 case SHOW_TEMP_ALARM: 431 res = (data->alarms >> bitalarmtemp[ix]) & 1; 432 break; 433 default: 434 res = 0; 435 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 436 } 437 438 return sprintf(buf, "%d\n", res); 439 } 440 441 static ssize_t set_temp(struct device *dev, struct device_attribute *attr, 442 const char *buf, size_t count) 443 { 444 struct vt1211_data *data = dev_get_drvdata(dev); 445 struct sensor_device_attribute_2 *sensor_attr_2 = 446 to_sensor_dev_attr_2(attr); 447 int ix = sensor_attr_2->index; 448 int fn = sensor_attr_2->nr; 449 long val = simple_strtol(buf, NULL, 10); 450 451 mutex_lock(&data->update_lock); 452 switch (fn) { 453 case SHOW_SET_TEMP_MAX: 454 data->temp_max[ix] = TEMP_TO_REG(ix, val); 455 vt1211_write8(data, regtempmax[ix], 456 data->temp_max[ix]); 457 break; 458 case SHOW_SET_TEMP_MAX_HYST: 459 data->temp_hyst[ix] = TEMP_TO_REG(ix, val); 460 vt1211_write8(data, regtemphyst[ix], 461 data->temp_hyst[ix]); 462 break; 463 default: 464 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 465 } 466 mutex_unlock(&data->update_lock); 467 468 return count; 469 } 470 471 /* --------------------------------------------------------------------- 472 * Fan sysfs interfaces 473 * ix = [0-1] 474 * --------------------------------------------------------------------- */ 475 476 #define SHOW_FAN_INPUT 0 477 #define SHOW_SET_FAN_MIN 1 478 #define SHOW_SET_FAN_DIV 2 479 #define SHOW_FAN_ALARM 3 480 481 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 482 char *buf) 483 { 484 struct vt1211_data *data = vt1211_update_device(dev); 485 struct sensor_device_attribute_2 *sensor_attr_2 = 486 to_sensor_dev_attr_2(attr); 487 int ix = sensor_attr_2->index; 488 int fn = sensor_attr_2->nr; 489 int res; 490 491 switch (fn) { 492 case SHOW_FAN_INPUT: 493 res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]); 494 break; 495 case SHOW_SET_FAN_MIN: 496 res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]); 497 break; 498 case SHOW_SET_FAN_DIV: 499 res = DIV_FROM_REG(data->fan_div[ix]); 500 break; 501 case SHOW_FAN_ALARM: 502 res = (data->alarms >> bitalarmfan[ix]) & 1; 503 break; 504 default: 505 res = 0; 506 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 507 } 508 509 return sprintf(buf, "%d\n", res); 510 } 511 512 static ssize_t set_fan(struct device *dev, struct device_attribute *attr, 513 const char *buf, size_t count) 514 { 515 struct vt1211_data *data = dev_get_drvdata(dev); 516 struct sensor_device_attribute_2 *sensor_attr_2 = 517 to_sensor_dev_attr_2(attr); 518 int ix = sensor_attr_2->index; 519 int fn = sensor_attr_2->nr; 520 long val = simple_strtol(buf, NULL, 10); 521 int reg; 522 523 mutex_lock(&data->update_lock); 524 525 /* sync the data cache */ 526 reg = vt1211_read8(data, VT1211_REG_FAN_DIV); 527 data->fan_div[0] = (reg >> 4) & 3; 528 data->fan_div[1] = (reg >> 6) & 3; 529 data->fan_ctl = reg & 0xf; 530 531 switch (fn) { 532 case SHOW_SET_FAN_MIN: 533 data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]); 534 vt1211_write8(data, VT1211_REG_FAN_MIN(ix), 535 data->fan_min[ix]); 536 break; 537 case SHOW_SET_FAN_DIV: 538 switch (val) { 539 case 1: data->fan_div[ix] = 0; break; 540 case 2: data->fan_div[ix] = 1; break; 541 case 4: data->fan_div[ix] = 2; break; 542 case 8: data->fan_div[ix] = 3; break; 543 default: 544 count = -EINVAL; 545 dev_warn(dev, "fan div value %ld not " 546 "supported. Choose one of 1, 2, " 547 "4, or 8.\n", val); 548 goto EXIT; 549 } 550 vt1211_write8(data, VT1211_REG_FAN_DIV, 551 ((data->fan_div[1] << 6) | 552 (data->fan_div[0] << 4) | 553 data->fan_ctl)); 554 break; 555 default: 556 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 557 } 558 559 EXIT: 560 mutex_unlock(&data->update_lock); 561 return count; 562 } 563 564 /* --------------------------------------------------------------------- 565 * PWM sysfs interfaces 566 * ix = [0-1] 567 * --------------------------------------------------------------------- */ 568 569 #define SHOW_PWM 0 570 #define SHOW_SET_PWM_ENABLE 1 571 #define SHOW_SET_PWM_FREQ 2 572 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3 573 574 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, 575 char *buf) 576 { 577 struct vt1211_data *data = vt1211_update_device(dev); 578 struct sensor_device_attribute_2 *sensor_attr_2 = 579 to_sensor_dev_attr_2(attr); 580 int ix = sensor_attr_2->index; 581 int fn = sensor_attr_2->nr; 582 int res; 583 584 switch (fn) { 585 case SHOW_PWM: 586 res = data->pwm[ix]; 587 break; 588 case SHOW_SET_PWM_ENABLE: 589 res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0; 590 break; 591 case SHOW_SET_PWM_FREQ: 592 res = 90000 >> (data->pwm_clk & 7); 593 break; 594 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: 595 res = (data->pwm_ctl[ix] & 7) + 1; 596 break; 597 default: 598 res = 0; 599 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 600 } 601 602 return sprintf(buf, "%d\n", res); 603 } 604 605 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 606 const char *buf, size_t count) 607 { 608 struct vt1211_data *data = dev_get_drvdata(dev); 609 struct sensor_device_attribute_2 *sensor_attr_2 = 610 to_sensor_dev_attr_2(attr); 611 int ix = sensor_attr_2->index; 612 int fn = sensor_attr_2->nr; 613 long val = simple_strtol(buf, NULL, 10); 614 int tmp, reg; 615 616 mutex_lock(&data->update_lock); 617 618 switch (fn) { 619 case SHOW_SET_PWM_ENABLE: 620 /* sync the data cache */ 621 reg = vt1211_read8(data, VT1211_REG_FAN_DIV); 622 data->fan_div[0] = (reg >> 4) & 3; 623 data->fan_div[1] = (reg >> 6) & 3; 624 data->fan_ctl = reg & 0xf; 625 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 626 data->pwm_ctl[0] = reg & 0xf; 627 data->pwm_ctl[1] = (reg >> 4) & 0xf; 628 switch (val) { 629 case 0: 630 data->pwm_ctl[ix] &= 7; 631 /* disable SmartGuardian if both PWM outputs are 632 * disabled */ 633 if ((data->pwm_ctl[ix ^ 1] & 1) == 0) { 634 data->fan_ctl &= 0xe; 635 } 636 break; 637 case 2: 638 data->pwm_ctl[ix] |= 8; 639 data->fan_ctl |= 1; 640 break; 641 default: 642 count = -EINVAL; 643 dev_warn(dev, "pwm mode %ld not supported. " 644 "Choose one of 0 or 2.\n", val); 645 goto EXIT; 646 } 647 vt1211_write8(data, VT1211_REG_PWM_CTL, 648 ((data->pwm_ctl[1] << 4) | 649 data->pwm_ctl[0])); 650 vt1211_write8(data, VT1211_REG_FAN_DIV, 651 ((data->fan_div[1] << 6) | 652 (data->fan_div[0] << 4) | 653 data->fan_ctl)); 654 break; 655 case SHOW_SET_PWM_FREQ: 656 val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000); 657 /* calculate tmp = log2(val) */ 658 tmp = 0; 659 for (val >>= 1; val > 0; val >>= 1) { 660 tmp++; 661 } 662 /* sync the data cache */ 663 reg = vt1211_read8(data, VT1211_REG_PWM_CLK); 664 data->pwm_clk = (reg & 0xf8) | tmp; 665 vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk); 666 break; 667 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: 668 if ((val < 1) || (val > 7)) { 669 count = -EINVAL; 670 dev_warn(dev, "temp channel %ld not supported. " 671 "Choose a value between 1 and 7.\n", val); 672 goto EXIT; 673 } 674 if (!ISTEMP(val - 1, data->uch_config)) { 675 count = -EINVAL; 676 dev_warn(dev, "temp channel %ld is not available.\n", 677 val); 678 goto EXIT; 679 } 680 /* sync the data cache */ 681 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 682 data->pwm_ctl[0] = reg & 0xf; 683 data->pwm_ctl[1] = (reg >> 4) & 0xf; 684 data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1); 685 vt1211_write8(data, VT1211_REG_PWM_CTL, 686 ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0])); 687 break; 688 default: 689 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); 690 } 691 692 EXIT: 693 mutex_unlock(&data->update_lock); 694 return count; 695 } 696 697 /* --------------------------------------------------------------------- 698 * PWM auto point definitions 699 * ix = [0-1] 700 * ap = [0-3] 701 * --------------------------------------------------------------------- */ 702 703 /* 704 * pwm[ix+1]_auto_point[ap+1]_temp mapping table: 705 * Note that there is only a single set of temp auto points that controls both 706 * PWM controllers. We still create 2 sets of sysfs files to make it look 707 * more consistent even though they map to the same registers. 708 * 709 * ix ap : description 710 * ------------------- 711 * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0]) 712 * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) 713 * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) 714 * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) 715 * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0]) 716 * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) 717 * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) 718 * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) 719 */ 720 721 static ssize_t show_pwm_auto_point_temp(struct device *dev, 722 struct device_attribute *attr, 723 char *buf) 724 { 725 struct vt1211_data *data = vt1211_update_device(dev); 726 struct sensor_device_attribute_2 *sensor_attr_2 = 727 to_sensor_dev_attr_2(attr); 728 int ix = sensor_attr_2->index; 729 int ap = sensor_attr_2->nr; 730 731 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7, 732 data->pwm_auto_temp[ap])); 733 } 734 735 static ssize_t set_pwm_auto_point_temp(struct device *dev, 736 struct device_attribute *attr, 737 const char *buf, size_t count) 738 { 739 struct vt1211_data *data = dev_get_drvdata(dev); 740 struct sensor_device_attribute_2 *sensor_attr_2 = 741 to_sensor_dev_attr_2(attr); 742 int ix = sensor_attr_2->index; 743 int ap = sensor_attr_2->nr; 744 long val = simple_strtol(buf, NULL, 10); 745 int reg; 746 747 mutex_lock(&data->update_lock); 748 749 /* sync the data cache */ 750 reg = vt1211_read8(data, VT1211_REG_PWM_CTL); 751 data->pwm_ctl[0] = reg & 0xf; 752 data->pwm_ctl[1] = (reg >> 4) & 0xf; 753 754 data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val); 755 vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap), 756 data->pwm_auto_temp[ap]); 757 mutex_unlock(&data->update_lock); 758 759 return count; 760 } 761 762 /* 763 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table: 764 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't 765 * be changed. 766 * 767 * ix ap : description 768 * ------------------- 769 * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0) 770 * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1]) 771 * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2]) 772 * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255) 773 * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0) 774 * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1]) 775 * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2]) 776 * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255) 777 */ 778 779 static ssize_t show_pwm_auto_point_pwm(struct device *dev, 780 struct device_attribute *attr, 781 char *buf) 782 { 783 struct vt1211_data *data = vt1211_update_device(dev); 784 struct sensor_device_attribute_2 *sensor_attr_2 = 785 to_sensor_dev_attr_2(attr); 786 int ix = sensor_attr_2->index; 787 int ap = sensor_attr_2->nr; 788 789 return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]); 790 } 791 792 static ssize_t set_pwm_auto_point_pwm(struct device *dev, 793 struct device_attribute *attr, 794 const char *buf, size_t count) 795 { 796 struct vt1211_data *data = dev_get_drvdata(dev); 797 struct sensor_device_attribute_2 *sensor_attr_2 = 798 to_sensor_dev_attr_2(attr); 799 int ix = sensor_attr_2->index; 800 int ap = sensor_attr_2->nr; 801 long val = simple_strtol(buf, NULL, 10); 802 803 if ((val < 0) || (val > 255)) { 804 dev_err(dev, "pwm value %ld is out of range. " 805 "Choose a value between 0 and 255.\n" , val); 806 return -EINVAL; 807 } 808 809 mutex_lock(&data->update_lock); 810 data->pwm_auto_pwm[ix][ap] = val; 811 vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap), 812 data->pwm_auto_pwm[ix][ap]); 813 mutex_unlock(&data->update_lock); 814 815 return count; 816 } 817 818 /* --------------------------------------------------------------------- 819 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms) 820 * --------------------------------------------------------------------- */ 821 822 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 823 char *buf) 824 { 825 struct vt1211_data *data = dev_get_drvdata(dev); 826 827 return sprintf(buf, "%d\n", data->vrm); 828 } 829 830 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 831 const char *buf, size_t count) 832 { 833 struct vt1211_data *data = dev_get_drvdata(dev); 834 long val = simple_strtol(buf, NULL, 10); 835 836 data->vrm = val; 837 838 return count; 839 } 840 841 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 842 char *buf) 843 { 844 struct vt1211_data *data = dev_get_drvdata(dev); 845 846 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 847 } 848 849 static ssize_t show_name(struct device *dev, 850 struct device_attribute *attr, char *buf) 851 { 852 struct vt1211_data *data = dev_get_drvdata(dev); 853 854 return sprintf(buf, "%s\n", data->name); 855 } 856 857 static ssize_t show_alarms(struct device *dev, 858 struct device_attribute *attr, char *buf) 859 { 860 struct vt1211_data *data = vt1211_update_device(dev); 861 862 return sprintf(buf, "%d\n", data->alarms); 863 } 864 865 /* --------------------------------------------------------------------- 866 * Device attribute structs 867 * --------------------------------------------------------------------- */ 868 869 #define SENSOR_ATTR_IN_INPUT(ix) \ 870 SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \ 871 show_in, NULL, SHOW_IN_INPUT, ix) 872 873 static struct sensor_device_attribute_2 vt1211_sysfs_in_input[] = { 874 SENSOR_ATTR_IN_INPUT(0), 875 SENSOR_ATTR_IN_INPUT(1), 876 SENSOR_ATTR_IN_INPUT(2), 877 SENSOR_ATTR_IN_INPUT(3), 878 SENSOR_ATTR_IN_INPUT(4), 879 SENSOR_ATTR_IN_INPUT(5), 880 }; 881 882 #define SENSOR_ATTR_IN_MIN(ix) \ 883 SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \ 884 show_in, set_in, SHOW_SET_IN_MIN, ix) 885 886 static struct sensor_device_attribute_2 vt1211_sysfs_in_min[] = { 887 SENSOR_ATTR_IN_MIN(0), 888 SENSOR_ATTR_IN_MIN(1), 889 SENSOR_ATTR_IN_MIN(2), 890 SENSOR_ATTR_IN_MIN(3), 891 SENSOR_ATTR_IN_MIN(4), 892 SENSOR_ATTR_IN_MIN(5), 893 }; 894 895 #define SENSOR_ATTR_IN_MAX(ix) \ 896 SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \ 897 show_in, set_in, SHOW_SET_IN_MAX, ix) 898 899 static struct sensor_device_attribute_2 vt1211_sysfs_in_max[] = { 900 SENSOR_ATTR_IN_MAX(0), 901 SENSOR_ATTR_IN_MAX(1), 902 SENSOR_ATTR_IN_MAX(2), 903 SENSOR_ATTR_IN_MAX(3), 904 SENSOR_ATTR_IN_MAX(4), 905 SENSOR_ATTR_IN_MAX(5), 906 }; 907 908 #define SENSOR_ATTR_IN_ALARM(ix) \ 909 SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \ 910 show_in, NULL, SHOW_IN_ALARM, ix) 911 912 static struct sensor_device_attribute_2 vt1211_sysfs_in_alarm[] = { 913 SENSOR_ATTR_IN_ALARM(0), 914 SENSOR_ATTR_IN_ALARM(1), 915 SENSOR_ATTR_IN_ALARM(2), 916 SENSOR_ATTR_IN_ALARM(3), 917 SENSOR_ATTR_IN_ALARM(4), 918 SENSOR_ATTR_IN_ALARM(5), 919 }; 920 921 #define SENSOR_ATTR_TEMP_INPUT(ix) \ 922 SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \ 923 show_temp, NULL, SHOW_TEMP_INPUT, ix-1) 924 925 static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = { 926 SENSOR_ATTR_TEMP_INPUT(1), 927 SENSOR_ATTR_TEMP_INPUT(2), 928 SENSOR_ATTR_TEMP_INPUT(3), 929 SENSOR_ATTR_TEMP_INPUT(4), 930 SENSOR_ATTR_TEMP_INPUT(5), 931 SENSOR_ATTR_TEMP_INPUT(6), 932 SENSOR_ATTR_TEMP_INPUT(7), 933 }; 934 935 #define SENSOR_ATTR_TEMP_MAX(ix) \ 936 SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \ 937 show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1) 938 939 static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = { 940 SENSOR_ATTR_TEMP_MAX(1), 941 SENSOR_ATTR_TEMP_MAX(2), 942 SENSOR_ATTR_TEMP_MAX(3), 943 SENSOR_ATTR_TEMP_MAX(4), 944 SENSOR_ATTR_TEMP_MAX(5), 945 SENSOR_ATTR_TEMP_MAX(6), 946 SENSOR_ATTR_TEMP_MAX(7), 947 }; 948 949 #define SENSOR_ATTR_TEMP_MAX_HYST(ix) \ 950 SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \ 951 show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1) 952 953 static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = { 954 SENSOR_ATTR_TEMP_MAX_HYST(1), 955 SENSOR_ATTR_TEMP_MAX_HYST(2), 956 SENSOR_ATTR_TEMP_MAX_HYST(3), 957 SENSOR_ATTR_TEMP_MAX_HYST(4), 958 SENSOR_ATTR_TEMP_MAX_HYST(5), 959 SENSOR_ATTR_TEMP_MAX_HYST(6), 960 SENSOR_ATTR_TEMP_MAX_HYST(7), 961 }; 962 963 #define SENSOR_ATTR_TEMP_ALARM(ix) \ 964 SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \ 965 show_temp, NULL, SHOW_TEMP_ALARM, ix-1) 966 967 static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = { 968 SENSOR_ATTR_TEMP_ALARM(1), 969 SENSOR_ATTR_TEMP_ALARM(2), 970 SENSOR_ATTR_TEMP_ALARM(3), 971 SENSOR_ATTR_TEMP_ALARM(4), 972 SENSOR_ATTR_TEMP_ALARM(5), 973 SENSOR_ATTR_TEMP_ALARM(6), 974 SENSOR_ATTR_TEMP_ALARM(7), 975 }; 976 977 #define SENSOR_ATTR_FAN(ix) \ 978 SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \ 979 show_fan, NULL, SHOW_FAN_INPUT, ix-1), \ 980 SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \ 981 show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \ 982 SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \ 983 show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \ 984 SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \ 985 show_fan, NULL, SHOW_FAN_ALARM, ix-1) 986 987 #define SENSOR_ATTR_PWM(ix) \ 988 SENSOR_ATTR_2(pwm##ix, S_IRUGO, \ 989 show_pwm, NULL, SHOW_PWM, ix-1), \ 990 SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \ 991 show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \ 992 SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \ 993 show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1) 994 995 #define SENSOR_ATTR_PWM_FREQ(ix) \ 996 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \ 997 show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1) 998 999 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \ 1000 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \ 1001 show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1) 1002 1003 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \ 1004 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \ 1005 show_pwm_auto_point_temp, set_pwm_auto_point_temp, \ 1006 ap-1, ix-1) 1007 1008 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \ 1009 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \ 1010 show_pwm_auto_point_temp, NULL, \ 1011 ap-1, ix-1) 1012 1013 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \ 1014 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \ 1015 show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \ 1016 ap-1, ix-1) 1017 1018 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \ 1019 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \ 1020 show_pwm_auto_point_pwm, NULL, \ 1021 ap-1, ix-1) 1022 1023 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = { 1024 SENSOR_ATTR_FAN(1), 1025 SENSOR_ATTR_FAN(2), 1026 SENSOR_ATTR_PWM(1), 1027 SENSOR_ATTR_PWM(2), 1028 SENSOR_ATTR_PWM_FREQ(1), 1029 SENSOR_ATTR_PWM_FREQ_RO(2), 1030 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1), 1031 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2), 1032 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3), 1033 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4), 1034 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1), 1035 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2), 1036 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3), 1037 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4), 1038 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1), 1039 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2), 1040 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3), 1041 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4), 1042 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1), 1043 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2), 1044 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3), 1045 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4), 1046 }; 1047 1048 static struct device_attribute vt1211_sysfs_misc[] = { 1049 __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm), 1050 __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL), 1051 __ATTR(name, S_IRUGO, show_name, NULL), 1052 __ATTR(alarms, S_IRUGO, show_alarms, NULL), 1053 }; 1054 1055 /* --------------------------------------------------------------------- 1056 * Device registration and initialization 1057 * --------------------------------------------------------------------- */ 1058 1059 static void __devinit vt1211_init_device(struct vt1211_data *data) 1060 { 1061 /* set VRM */ 1062 data->vrm = vid_which_vrm(); 1063 1064 /* Read (and initialize) UCH config */ 1065 data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG); 1066 if (uch_config > -1) { 1067 data->uch_config = (data->uch_config & 0x83) | 1068 (uch_config << 2); 1069 vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config); 1070 } 1071 1072 /* Initialize the interrupt mode (if request at module load time). 1073 * The VT1211 implements 3 different modes for clearing interrupts: 1074 * 0: Clear INT when status register is read. Regenerate INT as long 1075 * as temp stays above hysteresis limit. 1076 * 1: Clear INT when status register is read. DON'T regenerate INT 1077 * until temp falls below hysteresis limit and exceeds hot limit 1078 * again. 1079 * 2: Clear INT when temp falls below max limit. 1080 * 1081 * The driver only allows to force mode 0 since that's the only one 1082 * that makes sense for 'sensors' */ 1083 if (int_mode == 0) { 1084 vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0); 1085 vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0); 1086 } 1087 1088 /* Fill in some hard wired values into our data struct */ 1089 data->pwm_auto_pwm[0][3] = 255; 1090 data->pwm_auto_pwm[1][3] = 255; 1091 } 1092 1093 static void vt1211_remove_sysfs(struct platform_device *pdev) 1094 { 1095 struct device *dev = &pdev->dev; 1096 int i; 1097 1098 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) { 1099 device_remove_file(dev, 1100 &vt1211_sysfs_in_input[i].dev_attr); 1101 device_remove_file(dev, 1102 &vt1211_sysfs_in_min[i].dev_attr); 1103 device_remove_file(dev, 1104 &vt1211_sysfs_in_max[i].dev_attr); 1105 device_remove_file(dev, 1106 &vt1211_sysfs_in_alarm[i].dev_attr); 1107 } 1108 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) { 1109 device_remove_file(dev, 1110 &vt1211_sysfs_temp_input[i].dev_attr); 1111 device_remove_file(dev, 1112 &vt1211_sysfs_temp_max[i].dev_attr); 1113 device_remove_file(dev, 1114 &vt1211_sysfs_temp_max_hyst[i].dev_attr); 1115 device_remove_file(dev, 1116 &vt1211_sysfs_temp_alarm[i].dev_attr); 1117 } 1118 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { 1119 device_remove_file(dev, 1120 &vt1211_sysfs_fan_pwm[i].dev_attr); 1121 } 1122 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) { 1123 device_remove_file(dev, &vt1211_sysfs_misc[i]); 1124 } 1125 } 1126 1127 static int __devinit vt1211_probe(struct platform_device *pdev) 1128 { 1129 struct device *dev = &pdev->dev; 1130 struct vt1211_data *data; 1131 struct resource *res; 1132 int i, err; 1133 1134 if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) { 1135 err = -ENOMEM; 1136 dev_err(dev, "Out of memory\n"); 1137 goto EXIT; 1138 } 1139 1140 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1141 if (!request_region(res->start, resource_size(res), DRVNAME)) { 1142 err = -EBUSY; 1143 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", 1144 (unsigned long)res->start, (unsigned long)res->end); 1145 goto EXIT_KFREE; 1146 } 1147 data->addr = res->start; 1148 data->name = DRVNAME; 1149 mutex_init(&data->update_lock); 1150 1151 platform_set_drvdata(pdev, data); 1152 1153 /* Initialize the VT1211 chip */ 1154 vt1211_init_device(data); 1155 1156 /* Create sysfs interface files */ 1157 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) { 1158 if (ISVOLT(i, data->uch_config)) { 1159 if ((err = device_create_file(dev, 1160 &vt1211_sysfs_in_input[i].dev_attr)) || 1161 (err = device_create_file(dev, 1162 &vt1211_sysfs_in_min[i].dev_attr)) || 1163 (err = device_create_file(dev, 1164 &vt1211_sysfs_in_max[i].dev_attr)) || 1165 (err = device_create_file(dev, 1166 &vt1211_sysfs_in_alarm[i].dev_attr))) { 1167 goto EXIT_DEV_REMOVE; 1168 } 1169 } 1170 } 1171 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) { 1172 if (ISTEMP(i, data->uch_config)) { 1173 if ((err = device_create_file(dev, 1174 &vt1211_sysfs_temp_input[i].dev_attr)) || 1175 (err = device_create_file(dev, 1176 &vt1211_sysfs_temp_max[i].dev_attr)) || 1177 (err = device_create_file(dev, 1178 &vt1211_sysfs_temp_max_hyst[i].dev_attr)) || 1179 (err = device_create_file(dev, 1180 &vt1211_sysfs_temp_alarm[i].dev_attr))) { 1181 goto EXIT_DEV_REMOVE; 1182 } 1183 } 1184 } 1185 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { 1186 err = device_create_file(dev, 1187 &vt1211_sysfs_fan_pwm[i].dev_attr); 1188 if (err) { 1189 goto EXIT_DEV_REMOVE; 1190 } 1191 } 1192 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) { 1193 err = device_create_file(dev, 1194 &vt1211_sysfs_misc[i]); 1195 if (err) { 1196 goto EXIT_DEV_REMOVE; 1197 } 1198 } 1199 1200 /* Register device */ 1201 data->hwmon_dev = hwmon_device_register(dev); 1202 if (IS_ERR(data->hwmon_dev)) { 1203 err = PTR_ERR(data->hwmon_dev); 1204 dev_err(dev, "Class registration failed (%d)\n", err); 1205 goto EXIT_DEV_REMOVE_SILENT; 1206 } 1207 1208 return 0; 1209 1210 EXIT_DEV_REMOVE: 1211 dev_err(dev, "Sysfs interface creation failed (%d)\n", err); 1212 EXIT_DEV_REMOVE_SILENT: 1213 vt1211_remove_sysfs(pdev); 1214 release_region(res->start, resource_size(res)); 1215 EXIT_KFREE: 1216 platform_set_drvdata(pdev, NULL); 1217 kfree(data); 1218 EXIT: 1219 return err; 1220 } 1221 1222 static int __devexit vt1211_remove(struct platform_device *pdev) 1223 { 1224 struct vt1211_data *data = platform_get_drvdata(pdev); 1225 struct resource *res; 1226 1227 hwmon_device_unregister(data->hwmon_dev); 1228 vt1211_remove_sysfs(pdev); 1229 platform_set_drvdata(pdev, NULL); 1230 kfree(data); 1231 1232 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 1233 release_region(res->start, resource_size(res)); 1234 1235 return 0; 1236 } 1237 1238 static struct platform_driver vt1211_driver = { 1239 .driver = { 1240 .owner = THIS_MODULE, 1241 .name = DRVNAME, 1242 }, 1243 .probe = vt1211_probe, 1244 .remove = __devexit_p(vt1211_remove), 1245 }; 1246 1247 static int __init vt1211_device_add(unsigned short address) 1248 { 1249 struct resource res = { 1250 .start = address, 1251 .end = address + 0x7f, 1252 .flags = IORESOURCE_IO, 1253 }; 1254 int err; 1255 1256 pdev = platform_device_alloc(DRVNAME, address); 1257 if (!pdev) { 1258 err = -ENOMEM; 1259 pr_err("Device allocation failed (%d)\n", err); 1260 goto EXIT; 1261 } 1262 1263 res.name = pdev->name; 1264 err = acpi_check_resource_conflict(&res); 1265 if (err) 1266 goto EXIT_DEV_PUT; 1267 1268 err = platform_device_add_resources(pdev, &res, 1); 1269 if (err) { 1270 pr_err("Device resource addition failed (%d)\n", err); 1271 goto EXIT_DEV_PUT; 1272 } 1273 1274 err = platform_device_add(pdev); 1275 if (err) { 1276 pr_err("Device addition failed (%d)\n", err); 1277 goto EXIT_DEV_PUT; 1278 } 1279 1280 return 0; 1281 1282 EXIT_DEV_PUT: 1283 platform_device_put(pdev); 1284 EXIT: 1285 return err; 1286 } 1287 1288 static int __init vt1211_find(int sio_cip, unsigned short *address) 1289 { 1290 int err = -ENODEV; 1291 int devid; 1292 1293 superio_enter(sio_cip); 1294 1295 devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID); 1296 if (devid != SIO_VT1211_ID) { 1297 goto EXIT; 1298 } 1299 1300 superio_select(sio_cip, SIO_VT1211_LDN_HWMON); 1301 1302 if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) { 1303 pr_warn("HW monitor is disabled, skipping\n"); 1304 goto EXIT; 1305 } 1306 1307 *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) | 1308 (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00; 1309 if (*address == 0) { 1310 pr_warn("Base address is not set, skipping\n"); 1311 goto EXIT; 1312 } 1313 1314 err = 0; 1315 pr_info("Found VT1211 chip at 0x%04x, revision %u\n", 1316 *address, superio_inb(sio_cip, SIO_VT1211_DEVREV)); 1317 1318 EXIT: 1319 superio_exit(sio_cip); 1320 return err; 1321 } 1322 1323 static int __init vt1211_init(void) 1324 { 1325 int err; 1326 unsigned short address = 0; 1327 1328 if ((err = vt1211_find(SIO_REG_CIP1, &address)) && 1329 (err = vt1211_find(SIO_REG_CIP2, &address))) { 1330 goto EXIT; 1331 } 1332 1333 if ((uch_config < -1) || (uch_config > 31)) { 1334 err = -EINVAL; 1335 pr_warn("Invalid UCH configuration %d. " 1336 "Choose a value between 0 and 31.\n", uch_config); 1337 goto EXIT; 1338 } 1339 1340 if ((int_mode < -1) || (int_mode > 0)) { 1341 err = -EINVAL; 1342 pr_warn("Invalid interrupt mode %d. " 1343 "Only mode 0 is supported.\n", int_mode); 1344 goto EXIT; 1345 } 1346 1347 err = platform_driver_register(&vt1211_driver); 1348 if (err) { 1349 goto EXIT; 1350 } 1351 1352 /* Sets global pdev as a side effect */ 1353 err = vt1211_device_add(address); 1354 if (err) { 1355 goto EXIT_DRV_UNREGISTER; 1356 } 1357 1358 return 0; 1359 1360 EXIT_DRV_UNREGISTER: 1361 platform_driver_unregister(&vt1211_driver); 1362 EXIT: 1363 return err; 1364 } 1365 1366 static void __exit vt1211_exit(void) 1367 { 1368 platform_device_unregister(pdev); 1369 platform_driver_unregister(&vt1211_driver); 1370 } 1371 1372 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>"); 1373 MODULE_DESCRIPTION("VT1211 sensors"); 1374 MODULE_LICENSE("GPL"); 1375 1376 module_init(vt1211_init); 1377 module_exit(vt1211_exit); 1378