1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*************************************************************************** 3 * Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> * 4 * * 5 ***************************************************************************/ 6 7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/slab.h> 12 #include <linux/jiffies.h> 13 #include <linux/platform_device.h> 14 #include <linux/hwmon.h> 15 #include <linux/hwmon-sysfs.h> 16 #include <linux/err.h> 17 #include <linux/mutex.h> 18 #include "sch56xx-common.h" 19 20 #define DRVNAME "sch5636" 21 #define DEVNAME "theseus" /* We only support one model for now */ 22 23 #define SCH5636_REG_FUJITSU_ID 0x780 24 #define SCH5636_REG_FUJITSU_REV 0x783 25 26 #define SCH5636_NO_INS 5 27 #define SCH5636_NO_TEMPS 16 28 #define SCH5636_NO_FANS 8 29 30 static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = { 31 0x22, 0x23, 0x24, 0x25, 0x189 }; 32 static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = { 33 4400, 1500, 4000, 4400, 16000 }; 34 static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = { 35 "3.3V", "VREF", "VBAT", "3.3AUX", "12V" }; 36 37 static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = { 38 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181, 39 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C }; 40 #define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i)) 41 #define SCH5636_TEMP_WORKING 0x01 42 #define SCH5636_TEMP_ALARM 0x02 43 #define SCH5636_TEMP_DEACTIVATED 0x80 44 45 static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = { 46 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 }; 47 #define SCH5636_REG_FAN_CTRL(i) (0x880 + (i)) 48 /* FAULT in datasheet, but acts as an alarm */ 49 #define SCH5636_FAN_ALARM 0x04 50 #define SCH5636_FAN_NOT_PRESENT 0x08 51 #define SCH5636_FAN_DEACTIVATED 0x80 52 53 54 struct sch5636_data { 55 unsigned short addr; 56 struct device *hwmon_dev; 57 58 struct mutex update_lock; 59 bool valid; /* true if following fields are valid */ 60 unsigned long last_updated; /* In jiffies */ 61 u8 in[SCH5636_NO_INS]; 62 u8 temp_val[SCH5636_NO_TEMPS]; 63 u8 temp_ctrl[SCH5636_NO_TEMPS]; 64 u16 fan_val[SCH5636_NO_FANS]; 65 u8 fan_ctrl[SCH5636_NO_FANS]; 66 }; 67 68 static struct sch5636_data *sch5636_update_device(struct device *dev) 69 { 70 struct sch5636_data *data = dev_get_drvdata(dev); 71 struct sch5636_data *ret = data; 72 int i, val; 73 74 mutex_lock(&data->update_lock); 75 76 /* Cache the values for 1 second */ 77 if (data->valid && !time_after(jiffies, data->last_updated + HZ)) 78 goto abort; 79 80 for (i = 0; i < SCH5636_NO_INS; i++) { 81 val = sch56xx_read_virtual_reg(data->addr, 82 SCH5636_REG_IN_VAL[i]); 83 if (unlikely(val < 0)) { 84 ret = ERR_PTR(val); 85 goto abort; 86 } 87 data->in[i] = val; 88 } 89 90 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 91 if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED) 92 continue; 93 94 val = sch56xx_read_virtual_reg(data->addr, 95 SCH5636_REG_TEMP_VAL[i]); 96 if (unlikely(val < 0)) { 97 ret = ERR_PTR(val); 98 goto abort; 99 } 100 data->temp_val[i] = val; 101 102 val = sch56xx_read_virtual_reg(data->addr, 103 SCH5636_REG_TEMP_CTRL(i)); 104 if (unlikely(val < 0)) { 105 ret = ERR_PTR(val); 106 goto abort; 107 } 108 data->temp_ctrl[i] = val; 109 /* Alarms need to be explicitly write-cleared */ 110 if (val & SCH5636_TEMP_ALARM) { 111 sch56xx_write_virtual_reg(data->addr, 112 SCH5636_REG_TEMP_CTRL(i), val); 113 } 114 } 115 116 for (i = 0; i < SCH5636_NO_FANS; i++) { 117 if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED) 118 continue; 119 120 val = sch56xx_read_virtual_reg16(data->addr, 121 SCH5636_REG_FAN_VAL[i]); 122 if (unlikely(val < 0)) { 123 ret = ERR_PTR(val); 124 goto abort; 125 } 126 data->fan_val[i] = val; 127 128 val = sch56xx_read_virtual_reg(data->addr, 129 SCH5636_REG_FAN_CTRL(i)); 130 if (unlikely(val < 0)) { 131 ret = ERR_PTR(val); 132 goto abort; 133 } 134 data->fan_ctrl[i] = val; 135 /* Alarms need to be explicitly write-cleared */ 136 if (val & SCH5636_FAN_ALARM) { 137 sch56xx_write_virtual_reg(data->addr, 138 SCH5636_REG_FAN_CTRL(i), val); 139 } 140 } 141 142 data->last_updated = jiffies; 143 data->valid = true; 144 abort: 145 mutex_unlock(&data->update_lock); 146 return ret; 147 } 148 149 static int reg_to_rpm(u16 reg) 150 { 151 if (reg == 0) 152 return -EIO; 153 if (reg == 0xffff) 154 return 0; 155 156 return 5400540 / reg; 157 } 158 159 static ssize_t name_show(struct device *dev, struct device_attribute *devattr, 160 char *buf) 161 { 162 return sysfs_emit(buf, "%s\n", DEVNAME); 163 } 164 165 static ssize_t in_value_show(struct device *dev, 166 struct device_attribute *devattr, char *buf) 167 { 168 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 169 struct sch5636_data *data = sch5636_update_device(dev); 170 int val; 171 172 if (IS_ERR(data)) 173 return PTR_ERR(data); 174 175 val = DIV_ROUND_CLOSEST( 176 data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index], 177 255); 178 return sysfs_emit(buf, "%d\n", val); 179 } 180 181 static ssize_t in_label_show(struct device *dev, 182 struct device_attribute *devattr, char *buf) 183 { 184 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 185 186 return sysfs_emit(buf, "%s\n", 187 SCH5636_IN_LABELS[attr->index]); 188 } 189 190 static ssize_t temp_value_show(struct device *dev, 191 struct device_attribute *devattr, char *buf) 192 { 193 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 194 struct sch5636_data *data = sch5636_update_device(dev); 195 int val; 196 197 if (IS_ERR(data)) 198 return PTR_ERR(data); 199 200 val = (data->temp_val[attr->index] - 64) * 1000; 201 return sysfs_emit(buf, "%d\n", val); 202 } 203 204 static ssize_t temp_fault_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_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1; 215 return sysfs_emit(buf, "%d\n", val); 216 } 217 218 static ssize_t temp_alarm_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_ALARM) ? 1 : 0; 229 return sysfs_emit(buf, "%d\n", val); 230 } 231 232 static ssize_t fan_value_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 = reg_to_rpm(data->fan_val[attr->index]); 243 if (val < 0) 244 return val; 245 246 return sysfs_emit(buf, "%d\n", val); 247 } 248 249 static ssize_t fan_fault_show(struct device *dev, 250 struct device_attribute *devattr, char *buf) 251 { 252 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 253 struct sch5636_data *data = sch5636_update_device(dev); 254 int val; 255 256 if (IS_ERR(data)) 257 return PTR_ERR(data); 258 259 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0; 260 return sysfs_emit(buf, "%d\n", val); 261 } 262 263 static ssize_t fan_alarm_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_ALARM) ? 1 : 0; 274 return sysfs_emit(buf, "%d\n", val); 275 } 276 277 static struct sensor_device_attribute sch5636_attr[] = { 278 SENSOR_ATTR_RO(name, name, 0), 279 SENSOR_ATTR_RO(in0_input, in_value, 0), 280 SENSOR_ATTR_RO(in0_label, in_label, 0), 281 SENSOR_ATTR_RO(in1_input, in_value, 1), 282 SENSOR_ATTR_RO(in1_label, in_label, 1), 283 SENSOR_ATTR_RO(in2_input, in_value, 2), 284 SENSOR_ATTR_RO(in2_label, in_label, 2), 285 SENSOR_ATTR_RO(in3_input, in_value, 3), 286 SENSOR_ATTR_RO(in3_label, in_label, 3), 287 SENSOR_ATTR_RO(in4_input, in_value, 4), 288 SENSOR_ATTR_RO(in4_label, in_label, 4), 289 }; 290 291 static struct sensor_device_attribute sch5636_temp_attr[] = { 292 SENSOR_ATTR_RO(temp1_input, temp_value, 0), 293 SENSOR_ATTR_RO(temp1_fault, temp_fault, 0), 294 SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0), 295 SENSOR_ATTR_RO(temp2_input, temp_value, 1), 296 SENSOR_ATTR_RO(temp2_fault, temp_fault, 1), 297 SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1), 298 SENSOR_ATTR_RO(temp3_input, temp_value, 2), 299 SENSOR_ATTR_RO(temp3_fault, temp_fault, 2), 300 SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2), 301 SENSOR_ATTR_RO(temp4_input, temp_value, 3), 302 SENSOR_ATTR_RO(temp4_fault, temp_fault, 3), 303 SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3), 304 SENSOR_ATTR_RO(temp5_input, temp_value, 4), 305 SENSOR_ATTR_RO(temp5_fault, temp_fault, 4), 306 SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4), 307 SENSOR_ATTR_RO(temp6_input, temp_value, 5), 308 SENSOR_ATTR_RO(temp6_fault, temp_fault, 5), 309 SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5), 310 SENSOR_ATTR_RO(temp7_input, temp_value, 6), 311 SENSOR_ATTR_RO(temp7_fault, temp_fault, 6), 312 SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6), 313 SENSOR_ATTR_RO(temp8_input, temp_value, 7), 314 SENSOR_ATTR_RO(temp8_fault, temp_fault, 7), 315 SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7), 316 SENSOR_ATTR_RO(temp9_input, temp_value, 8), 317 SENSOR_ATTR_RO(temp9_fault, temp_fault, 8), 318 SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8), 319 SENSOR_ATTR_RO(temp10_input, temp_value, 9), 320 SENSOR_ATTR_RO(temp10_fault, temp_fault, 9), 321 SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9), 322 SENSOR_ATTR_RO(temp11_input, temp_value, 10), 323 SENSOR_ATTR_RO(temp11_fault, temp_fault, 10), 324 SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10), 325 SENSOR_ATTR_RO(temp12_input, temp_value, 11), 326 SENSOR_ATTR_RO(temp12_fault, temp_fault, 11), 327 SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11), 328 SENSOR_ATTR_RO(temp13_input, temp_value, 12), 329 SENSOR_ATTR_RO(temp13_fault, temp_fault, 12), 330 SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12), 331 SENSOR_ATTR_RO(temp14_input, temp_value, 13), 332 SENSOR_ATTR_RO(temp14_fault, temp_fault, 13), 333 SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13), 334 SENSOR_ATTR_RO(temp15_input, temp_value, 14), 335 SENSOR_ATTR_RO(temp15_fault, temp_fault, 14), 336 SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14), 337 SENSOR_ATTR_RO(temp16_input, temp_value, 15), 338 SENSOR_ATTR_RO(temp16_fault, temp_fault, 15), 339 SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15), 340 }; 341 342 static struct sensor_device_attribute sch5636_fan_attr[] = { 343 SENSOR_ATTR_RO(fan1_input, fan_value, 0), 344 SENSOR_ATTR_RO(fan1_fault, fan_fault, 0), 345 SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0), 346 SENSOR_ATTR_RO(fan2_input, fan_value, 1), 347 SENSOR_ATTR_RO(fan2_fault, fan_fault, 1), 348 SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1), 349 SENSOR_ATTR_RO(fan3_input, fan_value, 2), 350 SENSOR_ATTR_RO(fan3_fault, fan_fault, 2), 351 SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2), 352 SENSOR_ATTR_RO(fan4_input, fan_value, 3), 353 SENSOR_ATTR_RO(fan4_fault, fan_fault, 3), 354 SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3), 355 SENSOR_ATTR_RO(fan5_input, fan_value, 4), 356 SENSOR_ATTR_RO(fan5_fault, fan_fault, 4), 357 SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4), 358 SENSOR_ATTR_RO(fan6_input, fan_value, 5), 359 SENSOR_ATTR_RO(fan6_fault, fan_fault, 5), 360 SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5), 361 SENSOR_ATTR_RO(fan7_input, fan_value, 6), 362 SENSOR_ATTR_RO(fan7_fault, fan_fault, 6), 363 SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6), 364 SENSOR_ATTR_RO(fan8_input, fan_value, 7), 365 SENSOR_ATTR_RO(fan8_fault, fan_fault, 7), 366 SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7), 367 }; 368 369 static int sch5636_remove(struct platform_device *pdev) 370 { 371 struct sch5636_data *data = platform_get_drvdata(pdev); 372 int i; 373 374 if (data->hwmon_dev) 375 hwmon_device_unregister(data->hwmon_dev); 376 377 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) 378 device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr); 379 380 for (i = 0; i < SCH5636_NO_TEMPS * 3; i++) 381 device_remove_file(&pdev->dev, 382 &sch5636_temp_attr[i].dev_attr); 383 384 for (i = 0; i < SCH5636_NO_FANS * 3; i++) 385 device_remove_file(&pdev->dev, 386 &sch5636_fan_attr[i].dev_attr); 387 388 return 0; 389 } 390 391 static int sch5636_probe(struct platform_device *pdev) 392 { 393 struct sch5636_data *data; 394 int i, err, val, revision[2]; 395 char id[4]; 396 397 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data), 398 GFP_KERNEL); 399 if (!data) 400 return -ENOMEM; 401 402 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 403 mutex_init(&data->update_lock); 404 platform_set_drvdata(pdev, data); 405 406 for (i = 0; i < 3; i++) { 407 val = sch56xx_read_virtual_reg(data->addr, 408 SCH5636_REG_FUJITSU_ID + i); 409 if (val < 0) { 410 pr_err("Could not read Fujitsu id byte at %#x\n", 411 SCH5636_REG_FUJITSU_ID + i); 412 err = val; 413 goto error; 414 } 415 id[i] = val; 416 } 417 id[i] = '\0'; 418 419 if (strcmp(id, "THS")) { 420 pr_err("Unknown Fujitsu id: %02x%02x%02x\n", 421 id[0], id[1], id[2]); 422 err = -ENODEV; 423 goto error; 424 } 425 426 for (i = 0; i < 2; i++) { 427 val = sch56xx_read_virtual_reg(data->addr, 428 SCH5636_REG_FUJITSU_REV + i); 429 if (val < 0) { 430 err = val; 431 goto error; 432 } 433 revision[i] = val; 434 } 435 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME, 436 data->addr, revision[0], revision[1]); 437 438 /* Read all temp + fan ctrl registers to determine which are active */ 439 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 440 val = sch56xx_read_virtual_reg(data->addr, 441 SCH5636_REG_TEMP_CTRL(i)); 442 if (unlikely(val < 0)) { 443 err = val; 444 goto error; 445 } 446 data->temp_ctrl[i] = val; 447 } 448 449 for (i = 0; i < SCH5636_NO_FANS; i++) { 450 val = sch56xx_read_virtual_reg(data->addr, 451 SCH5636_REG_FAN_CTRL(i)); 452 if (unlikely(val < 0)) { 453 err = val; 454 goto error; 455 } 456 data->fan_ctrl[i] = val; 457 } 458 459 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) { 460 err = device_create_file(&pdev->dev, 461 &sch5636_attr[i].dev_attr); 462 if (err) 463 goto error; 464 } 465 466 for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) { 467 if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED) 468 continue; 469 470 err = device_create_file(&pdev->dev, 471 &sch5636_temp_attr[i].dev_attr); 472 if (err) 473 goto error; 474 } 475 476 for (i = 0; i < (SCH5636_NO_FANS * 3); i++) { 477 if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED) 478 continue; 479 480 err = device_create_file(&pdev->dev, 481 &sch5636_fan_attr[i].dev_attr); 482 if (err) 483 goto error; 484 } 485 486 data->hwmon_dev = hwmon_device_register(&pdev->dev); 487 if (IS_ERR(data->hwmon_dev)) { 488 err = PTR_ERR(data->hwmon_dev); 489 data->hwmon_dev = NULL; 490 goto error; 491 } 492 493 /* Note failing to register the watchdog is not a fatal error */ 494 sch56xx_watchdog_register(&pdev->dev, data->addr, (revision[0] << 8) | revision[1], 495 &data->update_lock, 0); 496 497 return 0; 498 499 error: 500 sch5636_remove(pdev); 501 return err; 502 } 503 504 static struct platform_driver sch5636_driver = { 505 .driver = { 506 .name = DRVNAME, 507 }, 508 .probe = sch5636_probe, 509 .remove = sch5636_remove, 510 }; 511 512 module_platform_driver(sch5636_driver); 513 514 MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver"); 515 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 516 MODULE_LICENSE("GPL"); 517