1 /*************************************************************************** 2 * Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> * 3 * * 4 * This program is free software; you can redistribute it and/or modify * 5 * it under the terms of the GNU General Public License as published by * 6 * the Free Software Foundation; either version 2 of the License, or * 7 * (at your option) any later version. * 8 * * 9 * This program is distributed in the hope that it will be useful, * 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 12 * GNU General Public License for more details. * 13 * * 14 * You should have received a copy of the GNU General Public License * 15 * along with this program; if not, write to the * 16 * Free Software Foundation, Inc., * 17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * 18 ***************************************************************************/ 19 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/slab.h> 25 #include <linux/jiffies.h> 26 #include <linux/platform_device.h> 27 #include <linux/hwmon.h> 28 #include <linux/hwmon-sysfs.h> 29 #include <linux/err.h> 30 #include <linux/mutex.h> 31 #include "sch56xx-common.h" 32 33 #define DRVNAME "sch5636" 34 #define DEVNAME "theseus" /* We only support one model for now */ 35 36 #define SCH5636_REG_FUJITSU_ID 0x780 37 #define SCH5636_REG_FUJITSU_REV 0x783 38 39 #define SCH5636_NO_INS 5 40 #define SCH5636_NO_TEMPS 16 41 #define SCH5636_NO_FANS 8 42 43 static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = { 44 0x22, 0x23, 0x24, 0x25, 0x189 }; 45 static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = { 46 4400, 1500, 4000, 4400, 16000 }; 47 static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = { 48 "3.3V", "VREF", "VBAT", "3.3AUX", "12V" }; 49 50 static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = { 51 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181, 52 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C }; 53 #define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i)) 54 #define SCH5636_TEMP_WORKING 0x01 55 #define SCH5636_TEMP_ALARM 0x02 56 #define SCH5636_TEMP_DEACTIVATED 0x80 57 58 static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = { 59 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 }; 60 #define SCH5636_REG_FAN_CTRL(i) (0x880 + (i)) 61 /* FAULT in datasheet, but acts as an alarm */ 62 #define SCH5636_FAN_ALARM 0x04 63 #define SCH5636_FAN_NOT_PRESENT 0x08 64 #define SCH5636_FAN_DEACTIVATED 0x80 65 66 67 struct sch5636_data { 68 unsigned short addr; 69 struct device *hwmon_dev; 70 struct sch56xx_watchdog_data *watchdog; 71 72 struct mutex update_lock; 73 char valid; /* !=0 if following fields are valid */ 74 unsigned long last_updated; /* In jiffies */ 75 u8 in[SCH5636_NO_INS]; 76 u8 temp_val[SCH5636_NO_TEMPS]; 77 u8 temp_ctrl[SCH5636_NO_TEMPS]; 78 u16 fan_val[SCH5636_NO_FANS]; 79 u8 fan_ctrl[SCH5636_NO_FANS]; 80 }; 81 82 static struct sch5636_data *sch5636_update_device(struct device *dev) 83 { 84 struct sch5636_data *data = dev_get_drvdata(dev); 85 struct sch5636_data *ret = data; 86 int i, val; 87 88 mutex_lock(&data->update_lock); 89 90 /* Cache the values for 1 second */ 91 if (data->valid && !time_after(jiffies, data->last_updated + HZ)) 92 goto abort; 93 94 for (i = 0; i < SCH5636_NO_INS; i++) { 95 val = sch56xx_read_virtual_reg(data->addr, 96 SCH5636_REG_IN_VAL[i]); 97 if (unlikely(val < 0)) { 98 ret = ERR_PTR(val); 99 goto abort; 100 } 101 data->in[i] = val; 102 } 103 104 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 105 if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED) 106 continue; 107 108 val = sch56xx_read_virtual_reg(data->addr, 109 SCH5636_REG_TEMP_VAL[i]); 110 if (unlikely(val < 0)) { 111 ret = ERR_PTR(val); 112 goto abort; 113 } 114 data->temp_val[i] = val; 115 116 val = sch56xx_read_virtual_reg(data->addr, 117 SCH5636_REG_TEMP_CTRL(i)); 118 if (unlikely(val < 0)) { 119 ret = ERR_PTR(val); 120 goto abort; 121 } 122 data->temp_ctrl[i] = val; 123 /* Alarms need to be explicitly write-cleared */ 124 if (val & SCH5636_TEMP_ALARM) { 125 sch56xx_write_virtual_reg(data->addr, 126 SCH5636_REG_TEMP_CTRL(i), val); 127 } 128 } 129 130 for (i = 0; i < SCH5636_NO_FANS; i++) { 131 if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED) 132 continue; 133 134 val = sch56xx_read_virtual_reg16(data->addr, 135 SCH5636_REG_FAN_VAL[i]); 136 if (unlikely(val < 0)) { 137 ret = ERR_PTR(val); 138 goto abort; 139 } 140 data->fan_val[i] = val; 141 142 val = sch56xx_read_virtual_reg(data->addr, 143 SCH5636_REG_FAN_CTRL(i)); 144 if (unlikely(val < 0)) { 145 ret = ERR_PTR(val); 146 goto abort; 147 } 148 data->fan_ctrl[i] = val; 149 /* Alarms need to be explicitly write-cleared */ 150 if (val & SCH5636_FAN_ALARM) { 151 sch56xx_write_virtual_reg(data->addr, 152 SCH5636_REG_FAN_CTRL(i), val); 153 } 154 } 155 156 data->last_updated = jiffies; 157 data->valid = 1; 158 abort: 159 mutex_unlock(&data->update_lock); 160 return ret; 161 } 162 163 static int reg_to_rpm(u16 reg) 164 { 165 if (reg == 0) 166 return -EIO; 167 if (reg == 0xffff) 168 return 0; 169 170 return 5400540 / reg; 171 } 172 173 static ssize_t name_show(struct device *dev, struct device_attribute *devattr, 174 char *buf) 175 { 176 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME); 177 } 178 179 static ssize_t in_value_show(struct device *dev, 180 struct device_attribute *devattr, char *buf) 181 { 182 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 183 struct sch5636_data *data = sch5636_update_device(dev); 184 int val; 185 186 if (IS_ERR(data)) 187 return PTR_ERR(data); 188 189 val = DIV_ROUND_CLOSEST( 190 data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index], 191 255); 192 return snprintf(buf, PAGE_SIZE, "%d\n", val); 193 } 194 195 static ssize_t in_label_show(struct device *dev, 196 struct device_attribute *devattr, char *buf) 197 { 198 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 199 200 return snprintf(buf, PAGE_SIZE, "%s\n", 201 SCH5636_IN_LABELS[attr->index]); 202 } 203 204 static ssize_t temp_value_show(struct device *dev, 205 struct device_attribute *devattr, char *buf) 206 { 207 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 208 struct sch5636_data *data = sch5636_update_device(dev); 209 int val; 210 211 if (IS_ERR(data)) 212 return PTR_ERR(data); 213 214 val = (data->temp_val[attr->index] - 64) * 1000; 215 return snprintf(buf, PAGE_SIZE, "%d\n", val); 216 } 217 218 static ssize_t temp_fault_show(struct device *dev, 219 struct device_attribute *devattr, char *buf) 220 { 221 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 222 struct sch5636_data *data = sch5636_update_device(dev); 223 int val; 224 225 if (IS_ERR(data)) 226 return PTR_ERR(data); 227 228 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1; 229 return snprintf(buf, PAGE_SIZE, "%d\n", val); 230 } 231 232 static ssize_t temp_alarm_show(struct device *dev, 233 struct device_attribute *devattr, char *buf) 234 { 235 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 236 struct sch5636_data *data = sch5636_update_device(dev); 237 int val; 238 239 if (IS_ERR(data)) 240 return PTR_ERR(data); 241 242 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0; 243 return snprintf(buf, PAGE_SIZE, "%d\n", val); 244 } 245 246 static ssize_t fan_value_show(struct device *dev, 247 struct device_attribute *devattr, char *buf) 248 { 249 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 250 struct sch5636_data *data = sch5636_update_device(dev); 251 int val; 252 253 if (IS_ERR(data)) 254 return PTR_ERR(data); 255 256 val = reg_to_rpm(data->fan_val[attr->index]); 257 if (val < 0) 258 return val; 259 260 return snprintf(buf, PAGE_SIZE, "%d\n", val); 261 } 262 263 static ssize_t fan_fault_show(struct device *dev, 264 struct device_attribute *devattr, char *buf) 265 { 266 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 267 struct sch5636_data *data = sch5636_update_device(dev); 268 int val; 269 270 if (IS_ERR(data)) 271 return PTR_ERR(data); 272 273 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0; 274 return snprintf(buf, PAGE_SIZE, "%d\n", val); 275 } 276 277 static ssize_t fan_alarm_show(struct device *dev, 278 struct device_attribute *devattr, char *buf) 279 { 280 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 281 struct sch5636_data *data = sch5636_update_device(dev); 282 int val; 283 284 if (IS_ERR(data)) 285 return PTR_ERR(data); 286 287 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0; 288 return snprintf(buf, PAGE_SIZE, "%d\n", val); 289 } 290 291 static struct sensor_device_attribute sch5636_attr[] = { 292 SENSOR_ATTR_RO(name, name, 0), 293 SENSOR_ATTR_RO(in0_input, in_value, 0), 294 SENSOR_ATTR_RO(in0_label, in_label, 0), 295 SENSOR_ATTR_RO(in1_input, in_value, 1), 296 SENSOR_ATTR_RO(in1_label, in_label, 1), 297 SENSOR_ATTR_RO(in2_input, in_value, 2), 298 SENSOR_ATTR_RO(in2_label, in_label, 2), 299 SENSOR_ATTR_RO(in3_input, in_value, 3), 300 SENSOR_ATTR_RO(in3_label, in_label, 3), 301 SENSOR_ATTR_RO(in4_input, in_value, 4), 302 SENSOR_ATTR_RO(in4_label, in_label, 4), 303 }; 304 305 static struct sensor_device_attribute sch5636_temp_attr[] = { 306 SENSOR_ATTR_RO(temp1_input, temp_value, 0), 307 SENSOR_ATTR_RO(temp1_fault, temp_fault, 0), 308 SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0), 309 SENSOR_ATTR_RO(temp2_input, temp_value, 1), 310 SENSOR_ATTR_RO(temp2_fault, temp_fault, 1), 311 SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1), 312 SENSOR_ATTR_RO(temp3_input, temp_value, 2), 313 SENSOR_ATTR_RO(temp3_fault, temp_fault, 2), 314 SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2), 315 SENSOR_ATTR_RO(temp4_input, temp_value, 3), 316 SENSOR_ATTR_RO(temp4_fault, temp_fault, 3), 317 SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3), 318 SENSOR_ATTR_RO(temp5_input, temp_value, 4), 319 SENSOR_ATTR_RO(temp5_fault, temp_fault, 4), 320 SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4), 321 SENSOR_ATTR_RO(temp6_input, temp_value, 5), 322 SENSOR_ATTR_RO(temp6_fault, temp_fault, 5), 323 SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5), 324 SENSOR_ATTR_RO(temp7_input, temp_value, 6), 325 SENSOR_ATTR_RO(temp7_fault, temp_fault, 6), 326 SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6), 327 SENSOR_ATTR_RO(temp8_input, temp_value, 7), 328 SENSOR_ATTR_RO(temp8_fault, temp_fault, 7), 329 SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7), 330 SENSOR_ATTR_RO(temp9_input, temp_value, 8), 331 SENSOR_ATTR_RO(temp9_fault, temp_fault, 8), 332 SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8), 333 SENSOR_ATTR_RO(temp10_input, temp_value, 9), 334 SENSOR_ATTR_RO(temp10_fault, temp_fault, 9), 335 SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9), 336 SENSOR_ATTR_RO(temp11_input, temp_value, 10), 337 SENSOR_ATTR_RO(temp11_fault, temp_fault, 10), 338 SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10), 339 SENSOR_ATTR_RO(temp12_input, temp_value, 11), 340 SENSOR_ATTR_RO(temp12_fault, temp_fault, 11), 341 SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11), 342 SENSOR_ATTR_RO(temp13_input, temp_value, 12), 343 SENSOR_ATTR_RO(temp13_fault, temp_fault, 12), 344 SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12), 345 SENSOR_ATTR_RO(temp14_input, temp_value, 13), 346 SENSOR_ATTR_RO(temp14_fault, temp_fault, 13), 347 SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13), 348 SENSOR_ATTR_RO(temp15_input, temp_value, 14), 349 SENSOR_ATTR_RO(temp15_fault, temp_fault, 14), 350 SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14), 351 SENSOR_ATTR_RO(temp16_input, temp_value, 15), 352 SENSOR_ATTR_RO(temp16_fault, temp_fault, 15), 353 SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15), 354 }; 355 356 static struct sensor_device_attribute sch5636_fan_attr[] = { 357 SENSOR_ATTR_RO(fan1_input, fan_value, 0), 358 SENSOR_ATTR_RO(fan1_fault, fan_fault, 0), 359 SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0), 360 SENSOR_ATTR_RO(fan2_input, fan_value, 1), 361 SENSOR_ATTR_RO(fan2_fault, fan_fault, 1), 362 SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1), 363 SENSOR_ATTR_RO(fan3_input, fan_value, 2), 364 SENSOR_ATTR_RO(fan3_fault, fan_fault, 2), 365 SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2), 366 SENSOR_ATTR_RO(fan4_input, fan_value, 3), 367 SENSOR_ATTR_RO(fan4_fault, fan_fault, 3), 368 SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3), 369 SENSOR_ATTR_RO(fan5_input, fan_value, 4), 370 SENSOR_ATTR_RO(fan5_fault, fan_fault, 4), 371 SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4), 372 SENSOR_ATTR_RO(fan6_input, fan_value, 5), 373 SENSOR_ATTR_RO(fan6_fault, fan_fault, 5), 374 SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5), 375 SENSOR_ATTR_RO(fan7_input, fan_value, 6), 376 SENSOR_ATTR_RO(fan7_fault, fan_fault, 6), 377 SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6), 378 SENSOR_ATTR_RO(fan8_input, fan_value, 7), 379 SENSOR_ATTR_RO(fan8_fault, fan_fault, 7), 380 SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7), 381 }; 382 383 static int sch5636_remove(struct platform_device *pdev) 384 { 385 struct sch5636_data *data = platform_get_drvdata(pdev); 386 int i; 387 388 if (data->watchdog) 389 sch56xx_watchdog_unregister(data->watchdog); 390 391 if (data->hwmon_dev) 392 hwmon_device_unregister(data->hwmon_dev); 393 394 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) 395 device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr); 396 397 for (i = 0; i < SCH5636_NO_TEMPS * 3; i++) 398 device_remove_file(&pdev->dev, 399 &sch5636_temp_attr[i].dev_attr); 400 401 for (i = 0; i < SCH5636_NO_FANS * 3; i++) 402 device_remove_file(&pdev->dev, 403 &sch5636_fan_attr[i].dev_attr); 404 405 return 0; 406 } 407 408 static int sch5636_probe(struct platform_device *pdev) 409 { 410 struct sch5636_data *data; 411 int i, err, val, revision[2]; 412 char id[4]; 413 414 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data), 415 GFP_KERNEL); 416 if (!data) 417 return -ENOMEM; 418 419 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 420 mutex_init(&data->update_lock); 421 platform_set_drvdata(pdev, data); 422 423 for (i = 0; i < 3; i++) { 424 val = sch56xx_read_virtual_reg(data->addr, 425 SCH5636_REG_FUJITSU_ID + i); 426 if (val < 0) { 427 pr_err("Could not read Fujitsu id byte at %#x\n", 428 SCH5636_REG_FUJITSU_ID + i); 429 err = val; 430 goto error; 431 } 432 id[i] = val; 433 } 434 id[i] = '\0'; 435 436 if (strcmp(id, "THS")) { 437 pr_err("Unknown Fujitsu id: %02x%02x%02x\n", 438 id[0], id[1], id[2]); 439 err = -ENODEV; 440 goto error; 441 } 442 443 for (i = 0; i < 2; i++) { 444 val = sch56xx_read_virtual_reg(data->addr, 445 SCH5636_REG_FUJITSU_REV + i); 446 if (val < 0) { 447 err = val; 448 goto error; 449 } 450 revision[i] = val; 451 } 452 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME, 453 data->addr, revision[0], revision[1]); 454 455 /* Read all temp + fan ctrl registers to determine which are active */ 456 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 457 val = sch56xx_read_virtual_reg(data->addr, 458 SCH5636_REG_TEMP_CTRL(i)); 459 if (unlikely(val < 0)) { 460 err = val; 461 goto error; 462 } 463 data->temp_ctrl[i] = val; 464 } 465 466 for (i = 0; i < SCH5636_NO_FANS; i++) { 467 val = sch56xx_read_virtual_reg(data->addr, 468 SCH5636_REG_FAN_CTRL(i)); 469 if (unlikely(val < 0)) { 470 err = val; 471 goto error; 472 } 473 data->fan_ctrl[i] = val; 474 } 475 476 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) { 477 err = device_create_file(&pdev->dev, 478 &sch5636_attr[i].dev_attr); 479 if (err) 480 goto error; 481 } 482 483 for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) { 484 if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED) 485 continue; 486 487 err = device_create_file(&pdev->dev, 488 &sch5636_temp_attr[i].dev_attr); 489 if (err) 490 goto error; 491 } 492 493 for (i = 0; i < (SCH5636_NO_FANS * 3); i++) { 494 if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED) 495 continue; 496 497 err = device_create_file(&pdev->dev, 498 &sch5636_fan_attr[i].dev_attr); 499 if (err) 500 goto error; 501 } 502 503 data->hwmon_dev = hwmon_device_register(&pdev->dev); 504 if (IS_ERR(data->hwmon_dev)) { 505 err = PTR_ERR(data->hwmon_dev); 506 data->hwmon_dev = NULL; 507 goto error; 508 } 509 510 /* Note failing to register the watchdog is not a fatal error */ 511 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr, 512 (revision[0] << 8) | revision[1], 513 &data->update_lock, 0); 514 515 return 0; 516 517 error: 518 sch5636_remove(pdev); 519 return err; 520 } 521 522 static struct platform_driver sch5636_driver = { 523 .driver = { 524 .name = DRVNAME, 525 }, 526 .probe = sch5636_probe, 527 .remove = sch5636_remove, 528 }; 529 530 module_platform_driver(sch5636_driver); 531 532 MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver"); 533 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 534 MODULE_LICENSE("GPL"); 535