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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 | // SPDX-License-Identifier: GPL-2.0-or-later /*************************************************************************** * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> * * * ***************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/platform_device.h> #include <linux/hwmon.h> #include <linux/err.h> #include <linux/mutex.h> #include "sch56xx-common.h" #define DRVNAME "sch5627" #define DEVNAME DRVNAME /* We only support one model */ #define SCH5627_HWMON_ID 0xa5 #define SCH5627_COMPANY_ID 0x5c #define SCH5627_PRIMARY_ID 0xa0 #define SCH5627_REG_BUILD_CODE 0x39 #define SCH5627_REG_BUILD_ID 0x3a #define SCH5627_REG_HWMON_ID 0x3c #define SCH5627_REG_HWMON_REV 0x3d #define SCH5627_REG_COMPANY_ID 0x3e #define SCH5627_REG_PRIMARY_ID 0x3f #define SCH5627_REG_CTRL 0x40 #define SCH5627_NO_TEMPS 8 #define SCH5627_NO_FANS 4 #define SCH5627_NO_IN 5 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { 0, 0, 1, 1, 0, 0, 0, 1 }; static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { 0x2C, 0x2E, 0x30, 0x32 }; static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { 0x62, 0x64, 0x66, 0x68 }; static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = { 0xA0, 0xA1, 0xA2, 0xA3 }; static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { 0x22, 0x23, 0x24, 0x25, 0x189 }; static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { 0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { 1, 0, 1, 0, 1 }; static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { 10745, 3660, 9765, 10745, 3660 }; static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { "VCC", "VTT", "VBAT", "VTR", "V_IN" }; struct sch5627_data { unsigned short addr; u8 control; u8 temp_max[SCH5627_NO_TEMPS]; u8 temp_crit[SCH5627_NO_TEMPS]; u16 fan_min[SCH5627_NO_FANS]; struct mutex update_lock; unsigned long last_battery; /* In jiffies */ char temp_valid; /* !=0 if following fields are valid */ char fan_valid; char in_valid; unsigned long temp_last_updated; /* In jiffies */ unsigned long fan_last_updated; unsigned long in_last_updated; u16 temp[SCH5627_NO_TEMPS]; u16 fan[SCH5627_NO_FANS]; u16 in[SCH5627_NO_IN]; }; static int sch5627_update_temp(struct sch5627_data *data) { int ret = 0; int i, val; mutex_lock(&data->update_lock); /* Cache the values for 1 second */ if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) { for (i = 0; i < SCH5627_NO_TEMPS; i++) { val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i], SCH5627_REG_TEMP_LSN[i], SCH5627_REG_TEMP_HIGH_NIBBLE[i]); if (unlikely(val < 0)) { ret = val; goto abort; } data->temp[i] = val; } data->temp_last_updated = jiffies; data->temp_valid = 1; } abort: mutex_unlock(&data->update_lock); return ret; } static int sch5627_update_fan(struct sch5627_data *data) { int ret = 0; int i, val; mutex_lock(&data->update_lock); /* Cache the values for 1 second */ if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) { for (i = 0; i < SCH5627_NO_FANS; i++) { val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]); if (unlikely(val < 0)) { ret = val; goto abort; } data->fan[i] = val; } data->fan_last_updated = jiffies; data->fan_valid = 1; } abort: mutex_unlock(&data->update_lock); return ret; } static int sch5627_update_in(struct sch5627_data *data) { int ret = 0; int i, val; mutex_lock(&data->update_lock); /* Trigger a Vbat voltage measurement every 5 minutes */ if (time_after(jiffies, data->last_battery + 300 * HZ)) { sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10); data->last_battery = jiffies; } /* Cache the values for 1 second */ if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) { for (i = 0; i < SCH5627_NO_IN; i++) { val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i], SCH5627_REG_IN_LSN[i], SCH5627_REG_IN_HIGH_NIBBLE[i]); if (unlikely(val < 0)) { ret = val; goto abort; } data->in[i] = val; } data->in_last_updated = jiffies; data->in_valid = 1; } abort: mutex_unlock(&data->update_lock); return ret; } static int sch5627_read_limits(struct sch5627_data *data) { int i, val; for (i = 0; i < SCH5627_NO_TEMPS; i++) { /* * Note what SMSC calls ABS, is what lm_sensors calls max * (aka high), and HIGH is what lm_sensors calls crit. */ val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_TEMP_ABS[i]); if (val < 0) return val; data->temp_max[i] = val; val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_TEMP_HIGH[i]); if (val < 0) return val; data->temp_crit[i] = val; } for (i = 0; i < SCH5627_NO_FANS; i++) { val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN_MIN[i]); if (val < 0) return val; data->fan_min[i] = val; } return 0; } static int reg_to_temp(u16 reg) { return (reg * 625) / 10 - 64000; } static int reg_to_temp_limit(u8 reg) { return (reg - 64) * 1000; } static int reg_to_rpm(u16 reg) { if (reg == 0) return -EIO; if (reg == 0xffff) return 0; return 5400540 / reg; } static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp) return 0644; return 0444; } static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { struct sch5627_data *data = dev_get_drvdata(dev); int ret; switch (type) { case hwmon_temp: ret = sch5627_update_temp(data); if (ret < 0) return ret; switch (attr) { case hwmon_temp_input: *val = reg_to_temp(data->temp[channel]); return 0; case hwmon_temp_max: *val = reg_to_temp_limit(data->temp_max[channel]); return 0; case hwmon_temp_crit: *val = reg_to_temp_limit(data->temp_crit[channel]); return 0; case hwmon_temp_fault: *val = (data->temp[channel] == 0); return 0; default: break; } break; case hwmon_fan: ret = sch5627_update_fan(data); if (ret < 0) return ret; switch (attr) { case hwmon_fan_input: ret = reg_to_rpm(data->fan[channel]); if (ret < 0) return ret; *val = ret; return 0; case hwmon_fan_min: ret = reg_to_rpm(data->fan_min[channel]); if (ret < 0) return ret; *val = ret; return 0; case hwmon_fan_fault: *val = (data->fan[channel] == 0xffff); return 0; default: break; } break; case hwmon_pwm: switch (attr) { case hwmon_pwm_auto_channels_temp: mutex_lock(&data->update_lock); ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]); mutex_unlock(&data->update_lock); if (ret < 0) return ret; *val = ret; return 0; default: break; } break; case hwmon_in: ret = sch5627_update_in(data); if (ret < 0) return ret; switch (attr) { case hwmon_in_input: *val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel], 10000); return 0; default: break; } break; default: break; } return -EOPNOTSUPP; } static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, const char **str) { switch (type) { case hwmon_in: switch (attr) { case hwmon_in_label: *str = SCH5627_IN_LABELS[channel]; return 0; default: break; } break; default: break; } return -EOPNOTSUPP; } static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { struct sch5627_data *data = dev_get_drvdata(dev); int ret; switch (type) { case hwmon_pwm: switch (attr) { case hwmon_pwm_auto_channels_temp: /* registers are 8 bit wide */ if (val > U8_MAX || val < 0) return -EINVAL; mutex_lock(&data->update_lock); ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel], val); mutex_unlock(&data->update_lock); return ret; default: break; } break; default: break; } return -EOPNOTSUPP; } static const struct hwmon_ops sch5627_ops = { .is_visible = sch5627_is_visible, .read = sch5627_read, .read_string = sch5627_read_string, .write = sch5627_write, }; static const struct hwmon_channel_info *sch5627_info[] = { HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT ), HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT ), HWMON_CHANNEL_INFO(pwm, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP, HWMON_PWM_AUTO_CHANNELS_TEMP ), HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT | HWMON_I_LABEL, HWMON_I_INPUT ), NULL }; static const struct hwmon_chip_info sch5627_chip_info = { .ops = &sch5627_ops, .info = sch5627_info, }; static int sch5627_probe(struct platform_device *pdev) { struct sch5627_data *data; struct device *hwmon_dev; int err, build_code, build_id, hwmon_rev, val; data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data), GFP_KERNEL); if (!data) return -ENOMEM; data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; mutex_init(&data->update_lock); platform_set_drvdata(pdev, data); val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID); if (val < 0) return val; if (val != SCH5627_HWMON_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", val, SCH5627_HWMON_ID); return -ENODEV; } val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID); if (val < 0) return val; if (val != SCH5627_COMPANY_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", val, SCH5627_COMPANY_ID); return -ENODEV; } val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID); if (val < 0) return val; if (val != SCH5627_PRIMARY_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", val, SCH5627_PRIMARY_ID); return -ENODEV; } build_code = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_BUILD_CODE); if (build_code < 0) return build_code; build_id = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_BUILD_ID); if (build_id < 0) return build_id; hwmon_rev = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_REV); if (hwmon_rev < 0) return hwmon_rev; val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL); if (val < 0) return val; data->control = val; if (!(data->control & 0x01)) { pr_err("hardware monitoring not enabled\n"); return -ENODEV; } /* Trigger a Vbat voltage measurement, so that we get a valid reading the first time we read Vbat */ sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10); data->last_battery = jiffies; /* * Read limits, we do this only once as reading a register on * the sch5627 is quite expensive (and they don't change). */ err = sch5627_read_limits(data); if (err) return err; pr_info("found %s chip at %#hx\n", DEVNAME, data->addr); pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", build_code, build_id, hwmon_rev); hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data, &sch5627_chip_info, NULL); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); /* Note failing to register the watchdog is not a fatal error */ sch56xx_watchdog_register(&pdev->dev, data->addr, (build_code << 24) | (build_id << 8) | hwmon_rev, &data->update_lock, 1); return 0; } static const struct platform_device_id sch5627_device_id[] = { { .name = "sch5627", }, { } }; MODULE_DEVICE_TABLE(platform, sch5627_device_id); static struct platform_driver sch5627_driver = { .driver = { .name = DRVNAME, }, .probe = sch5627_probe, .id_table = sch5627_device_id, }; module_platform_driver(sch5627_driver); MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); MODULE_LICENSE("GPL"); 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