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 struct sch56xx_watchdog_data *watchdog; 58 59 struct mutex update_lock; 60 char valid; /* !=0 if following fields are valid */ 61 unsigned long last_updated; /* In jiffies */ 62 u8 in[SCH5636_NO_INS]; 63 u8 temp_val[SCH5636_NO_TEMPS]; 64 u8 temp_ctrl[SCH5636_NO_TEMPS]; 65 u16 fan_val[SCH5636_NO_FANS]; 66 u8 fan_ctrl[SCH5636_NO_FANS]; 67 }; 68 69 static struct sch5636_data *sch5636_update_device(struct device *dev) 70 { 71 struct sch5636_data *data = dev_get_drvdata(dev); 72 struct sch5636_data *ret = data; 73 int i, val; 74 75 mutex_lock(&data->update_lock); 76 77 /* Cache the values for 1 second */ 78 if (data->valid && !time_after(jiffies, data->last_updated + HZ)) 79 goto abort; 80 81 for (i = 0; i < SCH5636_NO_INS; i++) { 82 val = sch56xx_read_virtual_reg(data->addr, 83 SCH5636_REG_IN_VAL[i]); 84 if (unlikely(val < 0)) { 85 ret = ERR_PTR(val); 86 goto abort; 87 } 88 data->in[i] = val; 89 } 90 91 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 92 if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED) 93 continue; 94 95 val = sch56xx_read_virtual_reg(data->addr, 96 SCH5636_REG_TEMP_VAL[i]); 97 if (unlikely(val < 0)) { 98 ret = ERR_PTR(val); 99 goto abort; 100 } 101 data->temp_val[i] = val; 102 103 val = sch56xx_read_virtual_reg(data->addr, 104 SCH5636_REG_TEMP_CTRL(i)); 105 if (unlikely(val < 0)) { 106 ret = ERR_PTR(val); 107 goto abort; 108 } 109 data->temp_ctrl[i] = val; 110 /* Alarms need to be explicitly write-cleared */ 111 if (val & SCH5636_TEMP_ALARM) { 112 sch56xx_write_virtual_reg(data->addr, 113 SCH5636_REG_TEMP_CTRL(i), val); 114 } 115 } 116 117 for (i = 0; i < SCH5636_NO_FANS; i++) { 118 if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED) 119 continue; 120 121 val = sch56xx_read_virtual_reg16(data->addr, 122 SCH5636_REG_FAN_VAL[i]); 123 if (unlikely(val < 0)) { 124 ret = ERR_PTR(val); 125 goto abort; 126 } 127 data->fan_val[i] = val; 128 129 val = sch56xx_read_virtual_reg(data->addr, 130 SCH5636_REG_FAN_CTRL(i)); 131 if (unlikely(val < 0)) { 132 ret = ERR_PTR(val); 133 goto abort; 134 } 135 data->fan_ctrl[i] = val; 136 /* Alarms need to be explicitly write-cleared */ 137 if (val & SCH5636_FAN_ALARM) { 138 sch56xx_write_virtual_reg(data->addr, 139 SCH5636_REG_FAN_CTRL(i), val); 140 } 141 } 142 143 data->last_updated = jiffies; 144 data->valid = 1; 145 abort: 146 mutex_unlock(&data->update_lock); 147 return ret; 148 } 149 150 static int reg_to_rpm(u16 reg) 151 { 152 if (reg == 0) 153 return -EIO; 154 if (reg == 0xffff) 155 return 0; 156 157 return 5400540 / reg; 158 } 159 160 static ssize_t name_show(struct device *dev, struct device_attribute *devattr, 161 char *buf) 162 { 163 return sysfs_emit(buf, "%s\n", DEVNAME); 164 } 165 166 static ssize_t in_value_show(struct device *dev, 167 struct device_attribute *devattr, char *buf) 168 { 169 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 170 struct sch5636_data *data = sch5636_update_device(dev); 171 int val; 172 173 if (IS_ERR(data)) 174 return PTR_ERR(data); 175 176 val = DIV_ROUND_CLOSEST( 177 data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index], 178 255); 179 return sysfs_emit(buf, "%d\n", val); 180 } 181 182 static ssize_t in_label_show(struct device *dev, 183 struct device_attribute *devattr, char *buf) 184 { 185 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 186 187 return sysfs_emit(buf, "%s\n", 188 SCH5636_IN_LABELS[attr->index]); 189 } 190 191 static ssize_t temp_value_show(struct device *dev, 192 struct device_attribute *devattr, char *buf) 193 { 194 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 195 struct sch5636_data *data = sch5636_update_device(dev); 196 int val; 197 198 if (IS_ERR(data)) 199 return PTR_ERR(data); 200 201 val = (data->temp_val[attr->index] - 64) * 1000; 202 return sysfs_emit(buf, "%d\n", val); 203 } 204 205 static ssize_t temp_fault_show(struct device *dev, 206 struct device_attribute *devattr, char *buf) 207 { 208 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 209 struct sch5636_data *data = sch5636_update_device(dev); 210 int val; 211 212 if (IS_ERR(data)) 213 return PTR_ERR(data); 214 215 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1; 216 return sysfs_emit(buf, "%d\n", val); 217 } 218 219 static ssize_t temp_alarm_show(struct device *dev, 220 struct device_attribute *devattr, char *buf) 221 { 222 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 223 struct sch5636_data *data = sch5636_update_device(dev); 224 int val; 225 226 if (IS_ERR(data)) 227 return PTR_ERR(data); 228 229 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0; 230 return sysfs_emit(buf, "%d\n", val); 231 } 232 233 static ssize_t fan_value_show(struct device *dev, 234 struct device_attribute *devattr, char *buf) 235 { 236 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 237 struct sch5636_data *data = sch5636_update_device(dev); 238 int val; 239 240 if (IS_ERR(data)) 241 return PTR_ERR(data); 242 243 val = reg_to_rpm(data->fan_val[attr->index]); 244 if (val < 0) 245 return val; 246 247 return sysfs_emit(buf, "%d\n", val); 248 } 249 250 static ssize_t fan_fault_show(struct device *dev, 251 struct device_attribute *devattr, char *buf) 252 { 253 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 254 struct sch5636_data *data = sch5636_update_device(dev); 255 int val; 256 257 if (IS_ERR(data)) 258 return PTR_ERR(data); 259 260 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0; 261 return sysfs_emit(buf, "%d\n", val); 262 } 263 264 static ssize_t fan_alarm_show(struct device *dev, 265 struct device_attribute *devattr, char *buf) 266 { 267 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 268 struct sch5636_data *data = sch5636_update_device(dev); 269 int val; 270 271 if (IS_ERR(data)) 272 return PTR_ERR(data); 273 274 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0; 275 return sysfs_emit(buf, "%d\n", val); 276 } 277 278 static struct sensor_device_attribute sch5636_attr[] = { 279 SENSOR_ATTR_RO(name, name, 0), 280 SENSOR_ATTR_RO(in0_input, in_value, 0), 281 SENSOR_ATTR_RO(in0_label, in_label, 0), 282 SENSOR_ATTR_RO(in1_input, in_value, 1), 283 SENSOR_ATTR_RO(in1_label, in_label, 1), 284 SENSOR_ATTR_RO(in2_input, in_value, 2), 285 SENSOR_ATTR_RO(in2_label, in_label, 2), 286 SENSOR_ATTR_RO(in3_input, in_value, 3), 287 SENSOR_ATTR_RO(in3_label, in_label, 3), 288 SENSOR_ATTR_RO(in4_input, in_value, 4), 289 SENSOR_ATTR_RO(in4_label, in_label, 4), 290 }; 291 292 static struct sensor_device_attribute sch5636_temp_attr[] = { 293 SENSOR_ATTR_RO(temp1_input, temp_value, 0), 294 SENSOR_ATTR_RO(temp1_fault, temp_fault, 0), 295 SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0), 296 SENSOR_ATTR_RO(temp2_input, temp_value, 1), 297 SENSOR_ATTR_RO(temp2_fault, temp_fault, 1), 298 SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1), 299 SENSOR_ATTR_RO(temp3_input, temp_value, 2), 300 SENSOR_ATTR_RO(temp3_fault, temp_fault, 2), 301 SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2), 302 SENSOR_ATTR_RO(temp4_input, temp_value, 3), 303 SENSOR_ATTR_RO(temp4_fault, temp_fault, 3), 304 SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3), 305 SENSOR_ATTR_RO(temp5_input, temp_value, 4), 306 SENSOR_ATTR_RO(temp5_fault, temp_fault, 4), 307 SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4), 308 SENSOR_ATTR_RO(temp6_input, temp_value, 5), 309 SENSOR_ATTR_RO(temp6_fault, temp_fault, 5), 310 SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5), 311 SENSOR_ATTR_RO(temp7_input, temp_value, 6), 312 SENSOR_ATTR_RO(temp7_fault, temp_fault, 6), 313 SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6), 314 SENSOR_ATTR_RO(temp8_input, temp_value, 7), 315 SENSOR_ATTR_RO(temp8_fault, temp_fault, 7), 316 SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7), 317 SENSOR_ATTR_RO(temp9_input, temp_value, 8), 318 SENSOR_ATTR_RO(temp9_fault, temp_fault, 8), 319 SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8), 320 SENSOR_ATTR_RO(temp10_input, temp_value, 9), 321 SENSOR_ATTR_RO(temp10_fault, temp_fault, 9), 322 SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9), 323 SENSOR_ATTR_RO(temp11_input, temp_value, 10), 324 SENSOR_ATTR_RO(temp11_fault, temp_fault, 10), 325 SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10), 326 SENSOR_ATTR_RO(temp12_input, temp_value, 11), 327 SENSOR_ATTR_RO(temp12_fault, temp_fault, 11), 328 SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11), 329 SENSOR_ATTR_RO(temp13_input, temp_value, 12), 330 SENSOR_ATTR_RO(temp13_fault, temp_fault, 12), 331 SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12), 332 SENSOR_ATTR_RO(temp14_input, temp_value, 13), 333 SENSOR_ATTR_RO(temp14_fault, temp_fault, 13), 334 SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13), 335 SENSOR_ATTR_RO(temp15_input, temp_value, 14), 336 SENSOR_ATTR_RO(temp15_fault, temp_fault, 14), 337 SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14), 338 SENSOR_ATTR_RO(temp16_input, temp_value, 15), 339 SENSOR_ATTR_RO(temp16_fault, temp_fault, 15), 340 SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15), 341 }; 342 343 static struct sensor_device_attribute sch5636_fan_attr[] = { 344 SENSOR_ATTR_RO(fan1_input, fan_value, 0), 345 SENSOR_ATTR_RO(fan1_fault, fan_fault, 0), 346 SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0), 347 SENSOR_ATTR_RO(fan2_input, fan_value, 1), 348 SENSOR_ATTR_RO(fan2_fault, fan_fault, 1), 349 SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1), 350 SENSOR_ATTR_RO(fan3_input, fan_value, 2), 351 SENSOR_ATTR_RO(fan3_fault, fan_fault, 2), 352 SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2), 353 SENSOR_ATTR_RO(fan4_input, fan_value, 3), 354 SENSOR_ATTR_RO(fan4_fault, fan_fault, 3), 355 SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3), 356 SENSOR_ATTR_RO(fan5_input, fan_value, 4), 357 SENSOR_ATTR_RO(fan5_fault, fan_fault, 4), 358 SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4), 359 SENSOR_ATTR_RO(fan6_input, fan_value, 5), 360 SENSOR_ATTR_RO(fan6_fault, fan_fault, 5), 361 SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5), 362 SENSOR_ATTR_RO(fan7_input, fan_value, 6), 363 SENSOR_ATTR_RO(fan7_fault, fan_fault, 6), 364 SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6), 365 SENSOR_ATTR_RO(fan8_input, fan_value, 7), 366 SENSOR_ATTR_RO(fan8_fault, fan_fault, 7), 367 SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7), 368 }; 369 370 static int sch5636_remove(struct platform_device *pdev) 371 { 372 struct sch5636_data *data = platform_get_drvdata(pdev); 373 int i; 374 375 if (data->watchdog) 376 sch56xx_watchdog_unregister(data->watchdog); 377 378 if (data->hwmon_dev) 379 hwmon_device_unregister(data->hwmon_dev); 380 381 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) 382 device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr); 383 384 for (i = 0; i < SCH5636_NO_TEMPS * 3; i++) 385 device_remove_file(&pdev->dev, 386 &sch5636_temp_attr[i].dev_attr); 387 388 for (i = 0; i < SCH5636_NO_FANS * 3; i++) 389 device_remove_file(&pdev->dev, 390 &sch5636_fan_attr[i].dev_attr); 391 392 return 0; 393 } 394 395 static int sch5636_probe(struct platform_device *pdev) 396 { 397 struct sch5636_data *data; 398 int i, err, val, revision[2]; 399 char id[4]; 400 401 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data), 402 GFP_KERNEL); 403 if (!data) 404 return -ENOMEM; 405 406 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 407 mutex_init(&data->update_lock); 408 platform_set_drvdata(pdev, data); 409 410 for (i = 0; i < 3; i++) { 411 val = sch56xx_read_virtual_reg(data->addr, 412 SCH5636_REG_FUJITSU_ID + i); 413 if (val < 0) { 414 pr_err("Could not read Fujitsu id byte at %#x\n", 415 SCH5636_REG_FUJITSU_ID + i); 416 err = val; 417 goto error; 418 } 419 id[i] = val; 420 } 421 id[i] = '\0'; 422 423 if (strcmp(id, "THS")) { 424 pr_err("Unknown Fujitsu id: %02x%02x%02x\n", 425 id[0], id[1], id[2]); 426 err = -ENODEV; 427 goto error; 428 } 429 430 for (i = 0; i < 2; i++) { 431 val = sch56xx_read_virtual_reg(data->addr, 432 SCH5636_REG_FUJITSU_REV + i); 433 if (val < 0) { 434 err = val; 435 goto error; 436 } 437 revision[i] = val; 438 } 439 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME, 440 data->addr, revision[0], revision[1]); 441 442 /* Read all temp + fan ctrl registers to determine which are active */ 443 for (i = 0; i < SCH5636_NO_TEMPS; i++) { 444 val = sch56xx_read_virtual_reg(data->addr, 445 SCH5636_REG_TEMP_CTRL(i)); 446 if (unlikely(val < 0)) { 447 err = val; 448 goto error; 449 } 450 data->temp_ctrl[i] = val; 451 } 452 453 for (i = 0; i < SCH5636_NO_FANS; i++) { 454 val = sch56xx_read_virtual_reg(data->addr, 455 SCH5636_REG_FAN_CTRL(i)); 456 if (unlikely(val < 0)) { 457 err = val; 458 goto error; 459 } 460 data->fan_ctrl[i] = val; 461 } 462 463 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) { 464 err = device_create_file(&pdev->dev, 465 &sch5636_attr[i].dev_attr); 466 if (err) 467 goto error; 468 } 469 470 for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) { 471 if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED) 472 continue; 473 474 err = device_create_file(&pdev->dev, 475 &sch5636_temp_attr[i].dev_attr); 476 if (err) 477 goto error; 478 } 479 480 for (i = 0; i < (SCH5636_NO_FANS * 3); i++) { 481 if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED) 482 continue; 483 484 err = device_create_file(&pdev->dev, 485 &sch5636_fan_attr[i].dev_attr); 486 if (err) 487 goto error; 488 } 489 490 data->hwmon_dev = hwmon_device_register(&pdev->dev); 491 if (IS_ERR(data->hwmon_dev)) { 492 err = PTR_ERR(data->hwmon_dev); 493 data->hwmon_dev = NULL; 494 goto error; 495 } 496 497 /* Note failing to register the watchdog is not a fatal error */ 498 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr, 499 (revision[0] << 8) | revision[1], 500 &data->update_lock, 0); 501 502 return 0; 503 504 error: 505 sch5636_remove(pdev); 506 return err; 507 } 508 509 static struct platform_driver sch5636_driver = { 510 .driver = { 511 .name = DRVNAME, 512 }, 513 .probe = sch5636_probe, 514 .remove = sch5636_remove, 515 }; 516 517 module_platform_driver(sch5636_driver); 518 519 MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver"); 520 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 521 MODULE_LICENSE("GPL"); 522