1 /* 2 * PMBus wrapper over SMBus 3 * 4 * Copyright 2021 Google LLC 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include <math.h> 11 #include <string.h> 12 #include "hw/i2c/pmbus_device.h" 13 #include "migration/vmstate.h" 14 #include "qemu/module.h" 15 #include "qemu/log.h" 16 17 uint16_t pmbus_data2direct_mode(PMBusCoefficients c, uint32_t value) 18 { 19 /* R is usually negative to fit large readings into 16 bits */ 20 uint16_t y = (c.m * value + c.b) * pow(10, c.R); 21 return y; 22 } 23 24 uint32_t pmbus_direct_mode2data(PMBusCoefficients c, uint16_t value) 25 { 26 /* X = (Y * 10^-R - b) / m */ 27 uint32_t x = (value / pow(10, c.R) - c.b) / c.m; 28 return x; 29 } 30 31 uint16_t pmbus_data2linear_mode(uint16_t value, int exp) 32 { 33 /* L = D * 2^(-e) */ 34 if (exp < 0) { 35 return value << (-exp); 36 } 37 return value >> exp; 38 } 39 40 uint16_t pmbus_linear_mode2data(uint16_t value, int exp) 41 { 42 /* D = L * 2^e */ 43 if (exp < 0) { 44 return value >> (-exp); 45 } 46 return value << exp; 47 } 48 49 void pmbus_send(PMBusDevice *pmdev, const uint8_t *data, uint16_t len) 50 { 51 if (pmdev->out_buf_len + len > SMBUS_DATA_MAX_LEN) { 52 qemu_log_mask(LOG_GUEST_ERROR, 53 "PMBus device tried to send too much data"); 54 len = 0; 55 } 56 57 for (int i = len - 1; i >= 0; i--) { 58 pmdev->out_buf[i + pmdev->out_buf_len] = data[len - i - 1]; 59 } 60 pmdev->out_buf_len += len; 61 } 62 63 /* Internal only, convert unsigned ints to the little endian bus */ 64 static void pmbus_send_uint(PMBusDevice *pmdev, uint64_t data, uint8_t size) 65 { 66 uint8_t bytes[8]; 67 g_assert(size <= 8); 68 69 for (int i = 0; i < size; i++) { 70 bytes[i] = data & 0xFF; 71 data = data >> 8; 72 } 73 pmbus_send(pmdev, bytes, size); 74 } 75 76 void pmbus_send8(PMBusDevice *pmdev, uint8_t data) 77 { 78 pmbus_send_uint(pmdev, data, 1); 79 } 80 81 void pmbus_send16(PMBusDevice *pmdev, uint16_t data) 82 { 83 pmbus_send_uint(pmdev, data, 2); 84 } 85 86 void pmbus_send32(PMBusDevice *pmdev, uint32_t data) 87 { 88 pmbus_send_uint(pmdev, data, 4); 89 } 90 91 void pmbus_send64(PMBusDevice *pmdev, uint64_t data) 92 { 93 pmbus_send_uint(pmdev, data, 8); 94 } 95 96 void pmbus_send_string(PMBusDevice *pmdev, const char *data) 97 { 98 size_t len = strlen(data); 99 g_assert(len > 0); 100 g_assert(len + pmdev->out_buf_len < SMBUS_DATA_MAX_LEN); 101 pmdev->out_buf[len + pmdev->out_buf_len] = len; 102 103 for (int i = len - 1; i >= 0; i--) { 104 pmdev->out_buf[i + pmdev->out_buf_len] = data[len - 1 - i]; 105 } 106 pmdev->out_buf_len += len + 1; 107 } 108 109 110 static uint64_t pmbus_receive_uint(PMBusDevice *pmdev) 111 { 112 uint64_t ret = 0; 113 114 /* Exclude command code from return value */ 115 pmdev->in_buf++; 116 pmdev->in_buf_len--; 117 118 for (int i = pmdev->in_buf_len - 1; i >= 0; i--) { 119 ret = ret << 8 | pmdev->in_buf[i]; 120 } 121 return ret; 122 } 123 124 uint8_t pmbus_receive8(PMBusDevice *pmdev) 125 { 126 if (pmdev->in_buf_len - 1 != 1) { 127 qemu_log_mask(LOG_GUEST_ERROR, 128 "%s: length mismatch. Expected 1 byte, got %d bytes\n", 129 __func__, pmdev->in_buf_len - 1); 130 } 131 return pmbus_receive_uint(pmdev); 132 } 133 134 uint16_t pmbus_receive16(PMBusDevice *pmdev) 135 { 136 if (pmdev->in_buf_len - 1 != 2) { 137 qemu_log_mask(LOG_GUEST_ERROR, 138 "%s: length mismatch. Expected 2 bytes, got %d bytes\n", 139 __func__, pmdev->in_buf_len - 1); 140 } 141 return pmbus_receive_uint(pmdev); 142 } 143 144 uint32_t pmbus_receive32(PMBusDevice *pmdev) 145 { 146 if (pmdev->in_buf_len - 1 != 4) { 147 qemu_log_mask(LOG_GUEST_ERROR, 148 "%s: length mismatch. Expected 4 bytes, got %d bytes\n", 149 __func__, pmdev->in_buf_len - 1); 150 } 151 return pmbus_receive_uint(pmdev); 152 } 153 154 uint64_t pmbus_receive64(PMBusDevice *pmdev) 155 { 156 if (pmdev->in_buf_len - 1 != 8) { 157 qemu_log_mask(LOG_GUEST_ERROR, 158 "%s: length mismatch. Expected 8 bytes, got %d bytes\n", 159 __func__, pmdev->in_buf_len - 1); 160 } 161 return pmbus_receive_uint(pmdev); 162 } 163 164 static uint8_t pmbus_out_buf_pop(PMBusDevice *pmdev) 165 { 166 if (pmdev->out_buf_len == 0) { 167 qemu_log_mask(LOG_GUEST_ERROR, 168 "%s: tried to read from empty buffer", 169 __func__); 170 return PMBUS_ERR_BYTE; 171 } 172 uint8_t data = pmdev->out_buf[pmdev->out_buf_len - 1]; 173 pmdev->out_buf_len--; 174 return data; 175 } 176 177 static void pmbus_quick_cmd(SMBusDevice *smd, uint8_t read) 178 { 179 PMBusDevice *pmdev = PMBUS_DEVICE(smd); 180 PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev); 181 182 if (pmdc->quick_cmd) { 183 pmdc->quick_cmd(pmdev, read); 184 } 185 } 186 187 static void pmbus_pages_alloc(PMBusDevice *pmdev) 188 { 189 /* some PMBus devices don't use the PAGE command, so they get 1 page */ 190 PMBusDeviceClass *k = PMBUS_DEVICE_GET_CLASS(pmdev); 191 if (k->device_num_pages == 0) { 192 k->device_num_pages = 1; 193 } 194 pmdev->num_pages = k->device_num_pages; 195 pmdev->pages = g_new0(PMBusPage, k->device_num_pages); 196 } 197 198 void pmbus_check_limits(PMBusDevice *pmdev) 199 { 200 for (int i = 0; i < pmdev->num_pages; i++) { 201 if ((pmdev->pages[i].operation & PB_OP_ON) == 0) { 202 continue; /* don't check powered off devices */ 203 } 204 205 if (pmdev->pages[i].read_vout > pmdev->pages[i].vout_ov_fault_limit) { 206 pmdev->pages[i].status_word |= PB_STATUS_VOUT; 207 pmdev->pages[i].status_vout |= PB_STATUS_VOUT_OV_FAULT; 208 } 209 210 if (pmdev->pages[i].read_vout > pmdev->pages[i].vout_ov_warn_limit) { 211 pmdev->pages[i].status_word |= PB_STATUS_VOUT; 212 pmdev->pages[i].status_vout |= PB_STATUS_VOUT_OV_WARN; 213 } 214 215 if (pmdev->pages[i].read_vout < pmdev->pages[i].vout_uv_warn_limit) { 216 pmdev->pages[i].status_word |= PB_STATUS_VOUT; 217 pmdev->pages[i].status_vout |= PB_STATUS_VOUT_UV_WARN; 218 } 219 220 if (pmdev->pages[i].read_vout < pmdev->pages[i].vout_uv_fault_limit) { 221 pmdev->pages[i].status_word |= PB_STATUS_VOUT; 222 pmdev->pages[i].status_vout |= PB_STATUS_VOUT_UV_FAULT; 223 } 224 225 if (pmdev->pages[i].read_vin > pmdev->pages[i].vin_ov_warn_limit) { 226 pmdev->pages[i].status_word |= PB_STATUS_INPUT; 227 pmdev->pages[i].status_input |= PB_STATUS_INPUT_VIN_OV_WARN; 228 } 229 230 if (pmdev->pages[i].read_vin < pmdev->pages[i].vin_uv_warn_limit) { 231 pmdev->pages[i].status_word |= PB_STATUS_INPUT; 232 pmdev->pages[i].status_input |= PB_STATUS_INPUT_VIN_UV_WARN; 233 } 234 235 if (pmdev->pages[i].read_iout > pmdev->pages[i].iout_oc_warn_limit) { 236 pmdev->pages[i].status_word |= PB_STATUS_IOUT_POUT; 237 pmdev->pages[i].status_iout |= PB_STATUS_IOUT_OC_WARN; 238 } 239 240 if (pmdev->pages[i].read_iout > pmdev->pages[i].iout_oc_fault_limit) { 241 pmdev->pages[i].status_word |= PB_STATUS_IOUT_POUT; 242 pmdev->pages[i].status_iout |= PB_STATUS_IOUT_OC_FAULT; 243 } 244 245 if (pmdev->pages[i].read_pin > pmdev->pages[i].pin_op_warn_limit) { 246 pmdev->pages[i].status_word |= PB_STATUS_INPUT; 247 pmdev->pages[i].status_input |= PB_STATUS_INPUT_PIN_OP_WARN; 248 } 249 250 if (pmdev->pages[i].read_temperature_1 251 > pmdev->pages[i].ot_fault_limit) { 252 pmdev->pages[i].status_word |= PB_STATUS_TEMPERATURE; 253 pmdev->pages[i].status_temperature |= PB_STATUS_OT_FAULT; 254 } 255 256 if (pmdev->pages[i].read_temperature_1 257 > pmdev->pages[i].ot_warn_limit) { 258 pmdev->pages[i].status_word |= PB_STATUS_TEMPERATURE; 259 pmdev->pages[i].status_temperature |= PB_STATUS_OT_WARN; 260 } 261 } 262 } 263 264 /* assert the status_cml error upon receipt of malformed command */ 265 static void pmbus_cml_error(PMBusDevice *pmdev) 266 { 267 for (int i = 0; i < pmdev->num_pages; i++) { 268 pmdev->pages[i].status_word |= PMBUS_STATUS_CML; 269 pmdev->pages[i].status_cml |= PB_CML_FAULT_INVALID_CMD; 270 } 271 } 272 273 static uint8_t pmbus_receive_byte(SMBusDevice *smd) 274 { 275 PMBusDevice *pmdev = PMBUS_DEVICE(smd); 276 PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev); 277 uint8_t ret = PMBUS_ERR_BYTE; 278 uint8_t index; 279 280 if (pmdev->out_buf_len != 0) { 281 ret = pmbus_out_buf_pop(pmdev); 282 return ret; 283 } 284 285 /* 286 * Reading from all pages will return the value from page 0, 287 * this is unspecified behaviour in general. 288 */ 289 if (pmdev->page == PB_ALL_PAGES) { 290 index = 0; 291 qemu_log_mask(LOG_GUEST_ERROR, 292 "%s: tried to read from all pages\n", 293 __func__); 294 pmbus_cml_error(pmdev); 295 } else if (pmdev->page > pmdev->num_pages - 1) { 296 qemu_log_mask(LOG_GUEST_ERROR, 297 "%s: page %d is out of range\n", 298 __func__, pmdev->page); 299 pmbus_cml_error(pmdev); 300 return PMBUS_ERR_BYTE; 301 } else { 302 index = pmdev->page; 303 } 304 305 switch (pmdev->code) { 306 case PMBUS_PAGE: 307 pmbus_send8(pmdev, pmdev->page); 308 break; 309 310 case PMBUS_OPERATION: /* R/W byte */ 311 pmbus_send8(pmdev, pmdev->pages[index].operation); 312 break; 313 314 case PMBUS_ON_OFF_CONFIG: /* R/W byte */ 315 pmbus_send8(pmdev, pmdev->pages[index].on_off_config); 316 break; 317 318 case PMBUS_PHASE: /* R/W byte */ 319 pmbus_send8(pmdev, pmdev->pages[index].phase); 320 break; 321 322 case PMBUS_WRITE_PROTECT: /* R/W byte */ 323 pmbus_send8(pmdev, pmdev->pages[index].write_protect); 324 break; 325 326 case PMBUS_CAPABILITY: 327 pmbus_send8(pmdev, pmdev->capability); 328 if (pmdev->capability & BIT(7)) { 329 qemu_log_mask(LOG_UNIMP, 330 "%s: PEC is enabled but not yet supported.\n", 331 __func__); 332 } 333 break; 334 335 case PMBUS_VOUT_MODE: /* R/W byte */ 336 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MODE) { 337 pmbus_send8(pmdev, pmdev->pages[index].vout_mode); 338 } else { 339 goto passthough; 340 } 341 break; 342 343 case PMBUS_VOUT_COMMAND: /* R/W word */ 344 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 345 pmbus_send16(pmdev, pmdev->pages[index].vout_command); 346 } else { 347 goto passthough; 348 } 349 break; 350 351 case PMBUS_VOUT_TRIM: /* R/W word */ 352 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 353 pmbus_send16(pmdev, pmdev->pages[index].vout_trim); 354 } else { 355 goto passthough; 356 } 357 break; 358 359 case PMBUS_VOUT_CAL_OFFSET: /* R/W word */ 360 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 361 pmbus_send16(pmdev, pmdev->pages[index].vout_cal_offset); 362 } else { 363 goto passthough; 364 } 365 break; 366 367 case PMBUS_VOUT_MAX: /* R/W word */ 368 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 369 pmbus_send16(pmdev, pmdev->pages[index].vout_max); 370 } else { 371 goto passthough; 372 } 373 break; 374 375 case PMBUS_VOUT_MARGIN_HIGH: /* R/W word */ 376 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) { 377 pmbus_send16(pmdev, pmdev->pages[index].vout_margin_high); 378 } else { 379 goto passthough; 380 } 381 break; 382 383 case PMBUS_VOUT_MARGIN_LOW: /* R/W word */ 384 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) { 385 pmbus_send16(pmdev, pmdev->pages[index].vout_margin_low); 386 } else { 387 goto passthough; 388 } 389 break; 390 391 case PMBUS_VOUT_TRANSITION_RATE: /* R/W word */ 392 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 393 pmbus_send16(pmdev, pmdev->pages[index].vout_transition_rate); 394 } else { 395 goto passthough; 396 } 397 break; 398 399 case PMBUS_VOUT_DROOP: /* R/W word */ 400 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 401 pmbus_send16(pmdev, pmdev->pages[index].vout_droop); 402 } else { 403 goto passthough; 404 } 405 break; 406 407 case PMBUS_VOUT_SCALE_LOOP: /* R/W word */ 408 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 409 pmbus_send16(pmdev, pmdev->pages[index].vout_scale_loop); 410 } else { 411 goto passthough; 412 } 413 break; 414 415 case PMBUS_VOUT_SCALE_MONITOR: /* R/W word */ 416 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 417 pmbus_send16(pmdev, pmdev->pages[index].vout_scale_monitor); 418 } else { 419 goto passthough; 420 } 421 break; 422 423 case PMBUS_VOUT_MIN: /* R/W word */ 424 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) { 425 pmbus_send16(pmdev, pmdev->pages[index].vout_min); 426 } else { 427 goto passthough; 428 } 429 break; 430 431 /* TODO: implement coefficients support */ 432 433 case PMBUS_POUT_MAX: /* R/W word */ 434 if (pmdev->pages[index].page_flags & PB_HAS_POUT) { 435 pmbus_send16(pmdev, pmdev->pages[index].pout_max); 436 } else { 437 goto passthough; 438 } 439 break; 440 441 case PMBUS_VIN_ON: /* R/W word */ 442 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 443 pmbus_send16(pmdev, pmdev->pages[index].vin_on); 444 } else { 445 goto passthough; 446 } 447 break; 448 449 case PMBUS_VIN_OFF: /* R/W word */ 450 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 451 pmbus_send16(pmdev, pmdev->pages[index].vin_off); 452 } else { 453 goto passthough; 454 } 455 break; 456 457 case PMBUS_IOUT_CAL_GAIN: /* R/W word */ 458 if (pmdev->pages[index].page_flags & PB_HAS_IOUT_GAIN) { 459 pmbus_send16(pmdev, pmdev->pages[index].iout_cal_gain); 460 } else { 461 goto passthough; 462 } 463 break; 464 465 case PMBUS_VOUT_OV_FAULT_LIMIT: /* R/W word */ 466 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 467 pmbus_send16(pmdev, pmdev->pages[index].vout_ov_fault_limit); 468 } else { 469 goto passthough; 470 } 471 break; 472 473 case PMBUS_VOUT_OV_FAULT_RESPONSE: /* R/W byte */ 474 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 475 pmbus_send8(pmdev, pmdev->pages[index].vout_ov_fault_response); 476 } else { 477 goto passthough; 478 } 479 break; 480 481 case PMBUS_VOUT_OV_WARN_LIMIT: /* R/W word */ 482 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 483 pmbus_send16(pmdev, pmdev->pages[index].vout_ov_warn_limit); 484 } else { 485 goto passthough; 486 } 487 break; 488 489 case PMBUS_VOUT_UV_WARN_LIMIT: /* R/W word */ 490 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 491 pmbus_send16(pmdev, pmdev->pages[index].vout_uv_warn_limit); 492 } else { 493 goto passthough; 494 } 495 break; 496 497 case PMBUS_VOUT_UV_FAULT_LIMIT: /* R/W word */ 498 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 499 pmbus_send16(pmdev, pmdev->pages[index].vout_uv_fault_limit); 500 } else { 501 goto passthough; 502 } 503 break; 504 505 case PMBUS_VOUT_UV_FAULT_RESPONSE: /* R/W byte */ 506 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 507 pmbus_send8(pmdev, pmdev->pages[index].vout_uv_fault_response); 508 } else { 509 goto passthough; 510 } 511 break; 512 513 case PMBUS_IOUT_OC_FAULT_LIMIT: /* R/W word */ 514 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 515 pmbus_send16(pmdev, pmdev->pages[index].iout_oc_fault_limit); 516 } else { 517 goto passthough; 518 } 519 break; 520 521 case PMBUS_IOUT_OC_FAULT_RESPONSE: /* R/W byte */ 522 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 523 pmbus_send8(pmdev, pmdev->pages[index].iout_oc_fault_response); 524 } else { 525 goto passthough; 526 } 527 break; 528 529 case PMBUS_IOUT_OC_LV_FAULT_LIMIT: /* R/W word */ 530 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 531 pmbus_send16(pmdev, pmdev->pages[index].iout_oc_lv_fault_limit); 532 } else { 533 goto passthough; 534 } 535 break; 536 537 case PMBUS_IOUT_OC_LV_FAULT_RESPONSE: /* R/W byte */ 538 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 539 pmbus_send8(pmdev, pmdev->pages[index].iout_oc_lv_fault_response); 540 } else { 541 goto passthough; 542 } 543 break; 544 545 case PMBUS_IOUT_OC_WARN_LIMIT: /* R/W word */ 546 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 547 pmbus_send16(pmdev, pmdev->pages[index].iout_oc_warn_limit); 548 } else { 549 goto passthough; 550 } 551 break; 552 553 case PMBUS_IOUT_UC_FAULT_LIMIT: /* R/W word */ 554 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 555 pmbus_send16(pmdev, pmdev->pages[index].iout_uc_fault_limit); 556 } else { 557 goto passthough; 558 } 559 break; 560 561 case PMBUS_IOUT_UC_FAULT_RESPONSE: /* R/W byte */ 562 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 563 pmbus_send8(pmdev, pmdev->pages[index].iout_uc_fault_response); 564 } else { 565 goto passthough; 566 } 567 break; 568 569 case PMBUS_OT_FAULT_LIMIT: /* R/W word */ 570 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 571 pmbus_send16(pmdev, pmdev->pages[index].ot_fault_limit); 572 } else { 573 goto passthough; 574 } 575 break; 576 577 case PMBUS_OT_FAULT_RESPONSE: /* R/W byte */ 578 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 579 pmbus_send8(pmdev, pmdev->pages[index].ot_fault_response); 580 } else { 581 goto passthough; 582 } 583 break; 584 585 case PMBUS_OT_WARN_LIMIT: /* R/W word */ 586 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 587 pmbus_send16(pmdev, pmdev->pages[index].ot_warn_limit); 588 } else { 589 goto passthough; 590 } 591 break; 592 593 case PMBUS_UT_WARN_LIMIT: /* R/W word */ 594 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 595 pmbus_send16(pmdev, pmdev->pages[index].ut_warn_limit); 596 } else { 597 goto passthough; 598 } 599 break; 600 601 case PMBUS_UT_FAULT_LIMIT: /* R/W word */ 602 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 603 pmbus_send16(pmdev, pmdev->pages[index].ut_fault_limit); 604 } else { 605 goto passthough; 606 } 607 break; 608 609 case PMBUS_UT_FAULT_RESPONSE: /* R/W byte */ 610 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 611 pmbus_send8(pmdev, pmdev->pages[index].ut_fault_response); 612 } else { 613 goto passthough; 614 } 615 break; 616 617 case PMBUS_VIN_OV_FAULT_LIMIT: /* R/W word */ 618 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 619 pmbus_send16(pmdev, pmdev->pages[index].vin_ov_fault_limit); 620 } else { 621 goto passthough; 622 } 623 break; 624 625 case PMBUS_VIN_OV_FAULT_RESPONSE: /* R/W byte */ 626 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 627 pmbus_send8(pmdev, pmdev->pages[index].vin_ov_fault_response); 628 } else { 629 goto passthough; 630 } 631 break; 632 633 case PMBUS_VIN_OV_WARN_LIMIT: /* R/W word */ 634 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 635 pmbus_send16(pmdev, pmdev->pages[index].vin_ov_warn_limit); 636 } else { 637 goto passthough; 638 } 639 break; 640 641 case PMBUS_VIN_UV_WARN_LIMIT: /* R/W word */ 642 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 643 pmbus_send16(pmdev, pmdev->pages[index].vin_uv_warn_limit); 644 } else { 645 goto passthough; 646 } 647 break; 648 649 case PMBUS_VIN_UV_FAULT_LIMIT: /* R/W word */ 650 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 651 pmbus_send16(pmdev, pmdev->pages[index].vin_uv_fault_limit); 652 } else { 653 goto passthough; 654 } 655 break; 656 657 case PMBUS_VIN_UV_FAULT_RESPONSE: /* R/W byte */ 658 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 659 pmbus_send8(pmdev, pmdev->pages[index].vin_uv_fault_response); 660 } else { 661 goto passthough; 662 } 663 break; 664 665 case PMBUS_IIN_OC_FAULT_LIMIT: /* R/W word */ 666 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 667 pmbus_send16(pmdev, pmdev->pages[index].iin_oc_fault_limit); 668 } else { 669 goto passthough; 670 } 671 break; 672 673 case PMBUS_IIN_OC_FAULT_RESPONSE: /* R/W byte */ 674 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 675 pmbus_send8(pmdev, pmdev->pages[index].iin_oc_fault_response); 676 } else { 677 goto passthough; 678 } 679 break; 680 681 case PMBUS_IIN_OC_WARN_LIMIT: /* R/W word */ 682 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 683 pmbus_send16(pmdev, pmdev->pages[index].iin_oc_warn_limit); 684 } else { 685 goto passthough; 686 } 687 break; 688 689 case PMBUS_POUT_OP_FAULT_LIMIT: /* R/W word */ 690 if (pmdev->pages[index].page_flags & PB_HAS_POUT) { 691 pmbus_send16(pmdev, pmdev->pages[index].pout_op_fault_limit); 692 } else { 693 goto passthough; 694 } 695 break; 696 697 case PMBUS_POUT_OP_FAULT_RESPONSE: /* R/W byte */ 698 if (pmdev->pages[index].page_flags & PB_HAS_POUT) { 699 pmbus_send8(pmdev, pmdev->pages[index].pout_op_fault_response); 700 } else { 701 goto passthough; 702 } 703 break; 704 705 case PMBUS_POUT_OP_WARN_LIMIT: /* R/W word */ 706 if (pmdev->pages[index].page_flags & PB_HAS_POUT) { 707 pmbus_send16(pmdev, pmdev->pages[index].pout_op_warn_limit); 708 } else { 709 goto passthough; 710 } 711 break; 712 713 case PMBUS_PIN_OP_WARN_LIMIT: /* R/W word */ 714 if (pmdev->pages[index].page_flags & PB_HAS_PIN) { 715 pmbus_send16(pmdev, pmdev->pages[index].pin_op_warn_limit); 716 } else { 717 goto passthough; 718 } 719 break; 720 721 case PMBUS_STATUS_BYTE: /* R/W byte */ 722 pmbus_send8(pmdev, pmdev->pages[index].status_word & 0xFF); 723 break; 724 725 case PMBUS_STATUS_WORD: /* R/W word */ 726 pmbus_send16(pmdev, pmdev->pages[index].status_word); 727 break; 728 729 case PMBUS_STATUS_VOUT: /* R/W byte */ 730 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 731 pmbus_send8(pmdev, pmdev->pages[index].status_vout); 732 } else { 733 goto passthough; 734 } 735 break; 736 737 case PMBUS_STATUS_IOUT: /* R/W byte */ 738 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 739 pmbus_send8(pmdev, pmdev->pages[index].status_iout); 740 } else { 741 goto passthough; 742 } 743 break; 744 745 case PMBUS_STATUS_INPUT: /* R/W byte */ 746 if (pmdev->pages[index].page_flags & PB_HAS_VIN || 747 pmdev->pages[index].page_flags & PB_HAS_IIN || 748 pmdev->pages[index].page_flags & PB_HAS_PIN) { 749 pmbus_send8(pmdev, pmdev->pages[index].status_input); 750 } else { 751 goto passthough; 752 } 753 break; 754 755 case PMBUS_STATUS_TEMPERATURE: /* R/W byte */ 756 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 757 pmbus_send8(pmdev, pmdev->pages[index].status_temperature); 758 } else { 759 goto passthough; 760 } 761 break; 762 763 case PMBUS_STATUS_CML: /* R/W byte */ 764 pmbus_send8(pmdev, pmdev->pages[index].status_cml); 765 break; 766 767 case PMBUS_STATUS_OTHER: /* R/W byte */ 768 pmbus_send8(pmdev, pmdev->pages[index].status_other); 769 break; 770 771 case PMBUS_STATUS_MFR_SPECIFIC: /* R/W byte */ 772 pmbus_send8(pmdev, pmdev->pages[index].status_mfr_specific); 773 break; 774 775 case PMBUS_READ_EIN: /* Read-Only block 5 bytes */ 776 if (pmdev->pages[index].page_flags & PB_HAS_EIN) { 777 pmbus_send(pmdev, pmdev->pages[index].read_ein, 5); 778 } else { 779 goto passthough; 780 } 781 break; 782 783 case PMBUS_READ_EOUT: /* Read-Only block 5 bytes */ 784 if (pmdev->pages[index].page_flags & PB_HAS_EOUT) { 785 pmbus_send(pmdev, pmdev->pages[index].read_eout, 5); 786 } else { 787 goto passthough; 788 } 789 break; 790 791 case PMBUS_READ_VIN: /* Read-Only word */ 792 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 793 pmbus_send16(pmdev, pmdev->pages[index].read_vin); 794 } else { 795 goto passthough; 796 } 797 break; 798 799 case PMBUS_READ_IIN: /* Read-Only word */ 800 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 801 pmbus_send16(pmdev, pmdev->pages[index].read_iin); 802 } else { 803 goto passthough; 804 } 805 break; 806 807 case PMBUS_READ_VOUT: /* Read-Only word */ 808 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 809 pmbus_send16(pmdev, pmdev->pages[index].read_vout); 810 } else { 811 goto passthough; 812 } 813 break; 814 815 case PMBUS_READ_IOUT: /* Read-Only word */ 816 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 817 pmbus_send16(pmdev, pmdev->pages[index].read_iout); 818 } else { 819 goto passthough; 820 } 821 break; 822 823 case PMBUS_READ_TEMPERATURE_1: /* Read-Only word */ 824 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 825 pmbus_send16(pmdev, pmdev->pages[index].read_temperature_1); 826 } else { 827 goto passthough; 828 } 829 break; 830 831 case PMBUS_READ_TEMPERATURE_2: /* Read-Only word */ 832 if (pmdev->pages[index].page_flags & PB_HAS_TEMP2) { 833 pmbus_send16(pmdev, pmdev->pages[index].read_temperature_2); 834 } else { 835 goto passthough; 836 } 837 break; 838 839 case PMBUS_READ_TEMPERATURE_3: /* Read-Only word */ 840 if (pmdev->pages[index].page_flags & PB_HAS_TEMP3) { 841 pmbus_send16(pmdev, pmdev->pages[index].read_temperature_3); 842 } else { 843 goto passthough; 844 } 845 break; 846 847 case PMBUS_READ_POUT: /* Read-Only word */ 848 if (pmdev->pages[index].page_flags & PB_HAS_POUT) { 849 pmbus_send16(pmdev, pmdev->pages[index].read_pout); 850 } else { 851 goto passthough; 852 } 853 break; 854 855 case PMBUS_READ_PIN: /* Read-Only word */ 856 if (pmdev->pages[index].page_flags & PB_HAS_PIN) { 857 pmbus_send16(pmdev, pmdev->pages[index].read_pin); 858 } else { 859 goto passthough; 860 } 861 break; 862 863 case PMBUS_REVISION: /* Read-Only byte */ 864 pmbus_send8(pmdev, pmdev->pages[index].revision); 865 break; 866 867 case PMBUS_MFR_ID: /* R/W block */ 868 if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) { 869 pmbus_send_string(pmdev, pmdev->pages[index].mfr_id); 870 } else { 871 goto passthough; 872 } 873 break; 874 875 case PMBUS_MFR_MODEL: /* R/W block */ 876 if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) { 877 pmbus_send_string(pmdev, pmdev->pages[index].mfr_model); 878 } else { 879 goto passthough; 880 } 881 break; 882 883 case PMBUS_MFR_REVISION: /* R/W block */ 884 if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) { 885 pmbus_send_string(pmdev, pmdev->pages[index].mfr_revision); 886 } else { 887 goto passthough; 888 } 889 break; 890 891 case PMBUS_MFR_LOCATION: /* R/W block */ 892 if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) { 893 pmbus_send_string(pmdev, pmdev->pages[index].mfr_location); 894 } else { 895 goto passthough; 896 } 897 break; 898 899 case PMBUS_MFR_VIN_MIN: /* Read-Only word */ 900 if (pmdev->pages[index].page_flags & PB_HAS_VIN_RATING) { 901 pmbus_send16(pmdev, pmdev->pages[index].mfr_vin_min); 902 } else { 903 goto passthough; 904 } 905 break; 906 907 case PMBUS_MFR_VIN_MAX: /* Read-Only word */ 908 if (pmdev->pages[index].page_flags & PB_HAS_VIN_RATING) { 909 pmbus_send16(pmdev, pmdev->pages[index].mfr_vin_max); 910 } else { 911 goto passthough; 912 } 913 break; 914 915 case PMBUS_MFR_IIN_MAX: /* Read-Only word */ 916 if (pmdev->pages[index].page_flags & PB_HAS_IIN_RATING) { 917 pmbus_send16(pmdev, pmdev->pages[index].mfr_iin_max); 918 } else { 919 goto passthough; 920 } 921 break; 922 923 case PMBUS_MFR_PIN_MAX: /* Read-Only word */ 924 if (pmdev->pages[index].page_flags & PB_HAS_PIN_RATING) { 925 pmbus_send16(pmdev, pmdev->pages[index].mfr_pin_max); 926 } else { 927 goto passthough; 928 } 929 break; 930 931 case PMBUS_MFR_VOUT_MIN: /* Read-Only word */ 932 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) { 933 pmbus_send16(pmdev, pmdev->pages[index].mfr_vout_min); 934 } else { 935 goto passthough; 936 } 937 break; 938 939 case PMBUS_MFR_VOUT_MAX: /* Read-Only word */ 940 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) { 941 pmbus_send16(pmdev, pmdev->pages[index].mfr_vout_max); 942 } else { 943 goto passthough; 944 } 945 break; 946 947 case PMBUS_MFR_IOUT_MAX: /* Read-Only word */ 948 if (pmdev->pages[index].page_flags & PB_HAS_IOUT_RATING) { 949 pmbus_send16(pmdev, pmdev->pages[index].mfr_iout_max); 950 } else { 951 goto passthough; 952 } 953 break; 954 955 case PMBUS_MFR_POUT_MAX: /* Read-Only word */ 956 if (pmdev->pages[index].page_flags & PB_HAS_POUT_RATING) { 957 pmbus_send16(pmdev, pmdev->pages[index].mfr_pout_max); 958 } else { 959 goto passthough; 960 } 961 break; 962 963 case PMBUS_MFR_MAX_TEMP_1: /* R/W word */ 964 if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) { 965 pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_1); 966 } else { 967 goto passthough; 968 } 969 break; 970 971 case PMBUS_MFR_MAX_TEMP_2: /* R/W word */ 972 if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) { 973 pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_2); 974 } else { 975 goto passthough; 976 } 977 break; 978 979 case PMBUS_MFR_MAX_TEMP_3: /* R/W word */ 980 if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) { 981 pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_3); 982 } else { 983 goto passthough; 984 } 985 break; 986 987 case PMBUS_CLEAR_FAULTS: /* Send Byte */ 988 case PMBUS_PAGE_PLUS_WRITE: /* Block Write-only */ 989 case PMBUS_STORE_DEFAULT_ALL: /* Send Byte */ 990 case PMBUS_RESTORE_DEFAULT_ALL: /* Send Byte */ 991 case PMBUS_STORE_DEFAULT_CODE: /* Write-only Byte */ 992 case PMBUS_RESTORE_DEFAULT_CODE: /* Write-only Byte */ 993 case PMBUS_STORE_USER_ALL: /* Send Byte */ 994 case PMBUS_RESTORE_USER_ALL: /* Send Byte */ 995 case PMBUS_STORE_USER_CODE: /* Write-only Byte */ 996 case PMBUS_RESTORE_USER_CODE: /* Write-only Byte */ 997 case PMBUS_QUERY: /* Write-Only */ 998 qemu_log_mask(LOG_GUEST_ERROR, 999 "%s: reading from write only register 0x%02x\n", 1000 __func__, pmdev->code); 1001 break; 1002 1003 passthough: 1004 default: 1005 /* Pass through read request if not handled */ 1006 if (pmdc->receive_byte) { 1007 ret = pmdc->receive_byte(pmdev); 1008 } 1009 break; 1010 } 1011 1012 if (pmdev->out_buf_len != 0) { 1013 ret = pmbus_out_buf_pop(pmdev); 1014 return ret; 1015 } 1016 1017 return ret; 1018 } 1019 1020 /* 1021 * PMBus clear faults command applies to all status registers, existing faults 1022 * should separately get re-asserted. 1023 */ 1024 static void pmbus_clear_faults(PMBusDevice *pmdev) 1025 { 1026 for (uint8_t i = 0; i < pmdev->num_pages; i++) { 1027 pmdev->pages[i].status_word = 0; 1028 pmdev->pages[i].status_vout = 0; 1029 pmdev->pages[i].status_iout = 0; 1030 pmdev->pages[i].status_input = 0; 1031 pmdev->pages[i].status_temperature = 0; 1032 pmdev->pages[i].status_cml = 0; 1033 pmdev->pages[i].status_other = 0; 1034 pmdev->pages[i].status_mfr_specific = 0; 1035 pmdev->pages[i].status_fans_1_2 = 0; 1036 pmdev->pages[i].status_fans_3_4 = 0; 1037 } 1038 1039 } 1040 1041 /* 1042 * PMBus operation is used to turn On and Off PSUs 1043 * Therefore, default value for the Operation should be PB_OP_ON or 0x80 1044 */ 1045 static void pmbus_operation(PMBusDevice *pmdev) 1046 { 1047 uint8_t index = pmdev->page; 1048 if ((pmdev->pages[index].operation & PB_OP_ON) == 0) { 1049 pmdev->pages[index].read_vout = 0; 1050 pmdev->pages[index].read_iout = 0; 1051 pmdev->pages[index].read_pout = 0; 1052 return; 1053 } 1054 1055 if (pmdev->pages[index].operation & (PB_OP_ON | PB_OP_MARGIN_HIGH)) { 1056 pmdev->pages[index].read_vout = pmdev->pages[index].vout_margin_high; 1057 } 1058 1059 if (pmdev->pages[index].operation & (PB_OP_ON | PB_OP_MARGIN_LOW)) { 1060 pmdev->pages[index].read_vout = pmdev->pages[index].vout_margin_low; 1061 } 1062 pmbus_check_limits(pmdev); 1063 } 1064 1065 static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len) 1066 { 1067 PMBusDevice *pmdev = PMBUS_DEVICE(smd); 1068 PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev); 1069 int ret = 0; 1070 uint8_t index; 1071 1072 if (len == 0) { 1073 qemu_log_mask(LOG_GUEST_ERROR, "%s: writing empty data\n", __func__); 1074 return PMBUS_ERR_BYTE; 1075 } 1076 1077 if (!pmdev->pages) { /* allocate memory for pages on first use */ 1078 pmbus_pages_alloc(pmdev); 1079 } 1080 1081 pmdev->in_buf_len = len; 1082 pmdev->in_buf = buf; 1083 1084 pmdev->code = buf[0]; /* PMBus command code */ 1085 if (len == 1) { /* Single length writes are command codes only */ 1086 return 0; 1087 } 1088 1089 if (pmdev->code == PMBUS_PAGE) { 1090 pmdev->page = pmbus_receive8(pmdev); 1091 return 0; 1092 } 1093 1094 /* loop through all the pages when 0xFF is received */ 1095 if (pmdev->page == PB_ALL_PAGES) { 1096 for (int i = 0; i < pmdev->num_pages; i++) { 1097 pmdev->page = i; 1098 pmbus_write_data(smd, buf, len); 1099 } 1100 pmdev->page = PB_ALL_PAGES; 1101 return 0; 1102 } 1103 1104 if (pmdev->page > pmdev->num_pages - 1) { 1105 qemu_log_mask(LOG_GUEST_ERROR, 1106 "%s: page %u is out of range\n", 1107 __func__, pmdev->page); 1108 pmdev->page = 0; /* undefined behaviour - reset to page 0 */ 1109 pmbus_cml_error(pmdev); 1110 return PMBUS_ERR_BYTE; 1111 } 1112 1113 index = pmdev->page; 1114 1115 switch (pmdev->code) { 1116 case PMBUS_OPERATION: /* R/W byte */ 1117 pmdev->pages[index].operation = pmbus_receive8(pmdev); 1118 pmbus_operation(pmdev); 1119 break; 1120 1121 case PMBUS_ON_OFF_CONFIG: /* R/W byte */ 1122 pmdev->pages[index].on_off_config = pmbus_receive8(pmdev); 1123 break; 1124 1125 case PMBUS_CLEAR_FAULTS: /* Send Byte */ 1126 pmbus_clear_faults(pmdev); 1127 break; 1128 1129 case PMBUS_PHASE: /* R/W byte */ 1130 pmdev->pages[index].phase = pmbus_receive8(pmdev); 1131 break; 1132 1133 case PMBUS_PAGE_PLUS_WRITE: /* Block Write-only */ 1134 case PMBUS_WRITE_PROTECT: /* R/W byte */ 1135 pmdev->pages[index].write_protect = pmbus_receive8(pmdev); 1136 break; 1137 1138 case PMBUS_VOUT_MODE: /* R/W byte */ 1139 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MODE) { 1140 pmdev->pages[index].vout_mode = pmbus_receive8(pmdev); 1141 } else { 1142 goto passthrough; 1143 } 1144 break; 1145 1146 case PMBUS_VOUT_COMMAND: /* R/W word */ 1147 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1148 pmdev->pages[index].vout_command = pmbus_receive16(pmdev); 1149 } else { 1150 goto passthrough; 1151 } 1152 break; 1153 1154 case PMBUS_VOUT_TRIM: /* R/W word */ 1155 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1156 pmdev->pages[index].vout_trim = pmbus_receive16(pmdev); 1157 } else { 1158 goto passthrough; 1159 } 1160 break; 1161 1162 case PMBUS_VOUT_CAL_OFFSET: /* R/W word */ 1163 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1164 pmdev->pages[index].vout_cal_offset = pmbus_receive16(pmdev); 1165 } else { 1166 goto passthrough; 1167 } 1168 break; 1169 1170 case PMBUS_VOUT_MAX: /* R/W word */ 1171 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1172 pmdev->pages[index].vout_max = pmbus_receive16(pmdev); 1173 } else { 1174 goto passthrough; 1175 } 1176 break; 1177 1178 case PMBUS_VOUT_MARGIN_HIGH: /* R/W word */ 1179 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) { 1180 pmdev->pages[index].vout_margin_high = pmbus_receive16(pmdev); 1181 } else { 1182 goto passthrough; 1183 } 1184 break; 1185 1186 case PMBUS_VOUT_MARGIN_LOW: /* R/W word */ 1187 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) { 1188 pmdev->pages[index].vout_margin_low = pmbus_receive16(pmdev); 1189 } else { 1190 goto passthrough; 1191 } 1192 break; 1193 1194 case PMBUS_VOUT_TRANSITION_RATE: /* R/W word */ 1195 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1196 pmdev->pages[index].vout_transition_rate = pmbus_receive16(pmdev); 1197 } else { 1198 goto passthrough; 1199 } 1200 break; 1201 1202 case PMBUS_VOUT_DROOP: /* R/W word */ 1203 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1204 pmdev->pages[index].vout_droop = pmbus_receive16(pmdev); 1205 } else { 1206 goto passthrough; 1207 } 1208 break; 1209 1210 case PMBUS_VOUT_SCALE_LOOP: /* R/W word */ 1211 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1212 pmdev->pages[index].vout_scale_loop = pmbus_receive16(pmdev); 1213 } else { 1214 goto passthrough; 1215 } 1216 break; 1217 1218 case PMBUS_VOUT_SCALE_MONITOR: /* R/W word */ 1219 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1220 pmdev->pages[index].vout_scale_monitor = pmbus_receive16(pmdev); 1221 } else { 1222 goto passthrough; 1223 } 1224 break; 1225 1226 case PMBUS_VOUT_MIN: /* R/W word */ 1227 if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) { 1228 pmdev->pages[index].vout_min = pmbus_receive16(pmdev); 1229 } else { 1230 goto passthrough; 1231 } 1232 break; 1233 1234 case PMBUS_POUT_MAX: /* R/W word */ 1235 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1236 pmdev->pages[index].pout_max = pmbus_receive16(pmdev); 1237 } else { 1238 goto passthrough; 1239 } 1240 break; 1241 1242 case PMBUS_VIN_ON: /* R/W word */ 1243 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1244 pmdev->pages[index].vin_on = pmbus_receive16(pmdev); 1245 } else { 1246 goto passthrough; 1247 } 1248 break; 1249 1250 case PMBUS_VIN_OFF: /* R/W word */ 1251 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1252 pmdev->pages[index].vin_off = pmbus_receive16(pmdev); 1253 } else { 1254 goto passthrough; 1255 } 1256 break; 1257 1258 case PMBUS_IOUT_CAL_GAIN: /* R/W word */ 1259 if (pmdev->pages[index].page_flags & PB_HAS_IOUT_GAIN) { 1260 pmdev->pages[index].iout_cal_gain = pmbus_receive16(pmdev); 1261 } else { 1262 goto passthrough; 1263 } 1264 break; 1265 1266 case PMBUS_VOUT_OV_FAULT_LIMIT: /* R/W word */ 1267 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1268 pmdev->pages[index].vout_ov_fault_limit = pmbus_receive16(pmdev); 1269 } else { 1270 goto passthrough; 1271 } 1272 break; 1273 1274 case PMBUS_VOUT_OV_FAULT_RESPONSE: /* R/W byte */ 1275 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1276 pmdev->pages[index].vout_ov_fault_response = pmbus_receive8(pmdev); 1277 } else { 1278 goto passthrough; 1279 } 1280 break; 1281 1282 case PMBUS_VOUT_OV_WARN_LIMIT: /* R/W word */ 1283 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1284 pmdev->pages[index].vout_ov_warn_limit = pmbus_receive16(pmdev); 1285 } else { 1286 goto passthrough; 1287 } 1288 break; 1289 1290 case PMBUS_VOUT_UV_WARN_LIMIT: /* R/W word */ 1291 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1292 pmdev->pages[index].vout_uv_warn_limit = pmbus_receive16(pmdev); 1293 } else { 1294 goto passthrough; 1295 } 1296 break; 1297 1298 case PMBUS_VOUT_UV_FAULT_LIMIT: /* R/W word */ 1299 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1300 pmdev->pages[index].vout_uv_fault_limit = pmbus_receive16(pmdev); 1301 } else { 1302 goto passthrough; 1303 } 1304 break; 1305 1306 case PMBUS_VOUT_UV_FAULT_RESPONSE: /* R/W byte */ 1307 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1308 pmdev->pages[index].vout_uv_fault_response = pmbus_receive8(pmdev); 1309 } else { 1310 goto passthrough; 1311 } 1312 break; 1313 1314 case PMBUS_IOUT_OC_FAULT_LIMIT: /* R/W word */ 1315 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1316 pmdev->pages[index].iout_oc_fault_limit = pmbus_receive16(pmdev); 1317 } else { 1318 goto passthrough; 1319 } 1320 break; 1321 1322 case PMBUS_IOUT_OC_FAULT_RESPONSE: /* R/W byte */ 1323 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1324 pmdev->pages[index].iout_oc_fault_response = pmbus_receive8(pmdev); 1325 } else { 1326 goto passthrough; 1327 } 1328 break; 1329 1330 case PMBUS_IOUT_OC_LV_FAULT_LIMIT: /* R/W word */ 1331 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1332 pmdev->pages[index].iout_oc_lv_fault_limit = pmbus_receive16(pmdev); 1333 } else { 1334 goto passthrough; 1335 } 1336 break; 1337 1338 case PMBUS_IOUT_OC_LV_FAULT_RESPONSE: /* R/W byte */ 1339 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1340 pmdev->pages[index].iout_oc_lv_fault_response 1341 = pmbus_receive8(pmdev); 1342 } else { 1343 goto passthrough; 1344 } 1345 break; 1346 1347 case PMBUS_IOUT_OC_WARN_LIMIT: /* R/W word */ 1348 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1349 pmdev->pages[index].iout_oc_warn_limit = pmbus_receive16(pmdev); 1350 } else { 1351 goto passthrough; 1352 } 1353 break; 1354 1355 case PMBUS_IOUT_UC_FAULT_LIMIT: /* R/W word */ 1356 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1357 pmdev->pages[index].iout_uc_fault_limit = pmbus_receive16(pmdev); 1358 } else { 1359 goto passthrough; 1360 } 1361 break; 1362 1363 case PMBUS_IOUT_UC_FAULT_RESPONSE: /* R/W byte */ 1364 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1365 pmdev->pages[index].iout_uc_fault_response = pmbus_receive8(pmdev); 1366 } else { 1367 goto passthrough; 1368 } 1369 break; 1370 1371 case PMBUS_OT_FAULT_LIMIT: /* R/W word */ 1372 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1373 pmdev->pages[index].ot_fault_limit = pmbus_receive16(pmdev); 1374 } else { 1375 goto passthrough; 1376 } 1377 break; 1378 1379 case PMBUS_OT_FAULT_RESPONSE: /* R/W byte */ 1380 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1381 pmdev->pages[index].ot_fault_response = pmbus_receive8(pmdev); 1382 } else { 1383 goto passthrough; 1384 } 1385 break; 1386 1387 case PMBUS_OT_WARN_LIMIT: /* R/W word */ 1388 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1389 pmdev->pages[index].ot_warn_limit = pmbus_receive16(pmdev); 1390 } else { 1391 goto passthrough; 1392 } 1393 break; 1394 1395 case PMBUS_UT_WARN_LIMIT: /* R/W word */ 1396 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1397 pmdev->pages[index].ut_warn_limit = pmbus_receive16(pmdev); 1398 } else { 1399 goto passthrough; 1400 } 1401 break; 1402 1403 case PMBUS_UT_FAULT_LIMIT: /* R/W word */ 1404 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1405 pmdev->pages[index].ut_fault_limit = pmbus_receive16(pmdev); 1406 } else { 1407 goto passthrough; 1408 } 1409 break; 1410 1411 case PMBUS_UT_FAULT_RESPONSE: /* R/W byte */ 1412 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1413 pmdev->pages[index].ut_fault_response = pmbus_receive8(pmdev); 1414 } else { 1415 goto passthrough; 1416 } 1417 break; 1418 1419 case PMBUS_VIN_OV_FAULT_LIMIT: /* R/W word */ 1420 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1421 pmdev->pages[index].vin_ov_fault_limit = pmbus_receive16(pmdev); 1422 } else { 1423 goto passthrough; 1424 } 1425 break; 1426 1427 case PMBUS_VIN_OV_FAULT_RESPONSE: /* R/W byte */ 1428 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1429 pmdev->pages[index].vin_ov_fault_response = pmbus_receive8(pmdev); 1430 } else { 1431 goto passthrough; 1432 } 1433 break; 1434 1435 case PMBUS_VIN_OV_WARN_LIMIT: /* R/W word */ 1436 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1437 pmdev->pages[index].vin_ov_warn_limit = pmbus_receive16(pmdev); 1438 } else { 1439 goto passthrough; 1440 } 1441 break; 1442 1443 case PMBUS_VIN_UV_WARN_LIMIT: /* R/W word */ 1444 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1445 pmdev->pages[index].vin_uv_warn_limit = pmbus_receive16(pmdev); 1446 } else { 1447 goto passthrough; 1448 } 1449 break; 1450 1451 case PMBUS_VIN_UV_FAULT_LIMIT: /* R/W word */ 1452 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1453 pmdev->pages[index].vin_uv_fault_limit = pmbus_receive16(pmdev); 1454 } else { 1455 goto passthrough; 1456 } 1457 break; 1458 1459 case PMBUS_VIN_UV_FAULT_RESPONSE: /* R/W byte */ 1460 if (pmdev->pages[index].page_flags & PB_HAS_VIN) { 1461 pmdev->pages[index].vin_uv_fault_response = pmbus_receive8(pmdev); 1462 } else { 1463 goto passthrough; 1464 } 1465 break; 1466 1467 case PMBUS_IIN_OC_FAULT_LIMIT: /* R/W word */ 1468 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 1469 pmdev->pages[index].iin_oc_fault_limit = pmbus_receive16(pmdev); 1470 } else { 1471 goto passthrough; 1472 } 1473 break; 1474 1475 case PMBUS_IIN_OC_FAULT_RESPONSE: /* R/W byte */ 1476 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 1477 pmdev->pages[index].iin_oc_fault_response = pmbus_receive8(pmdev); 1478 } else { 1479 goto passthrough; 1480 } 1481 break; 1482 1483 case PMBUS_IIN_OC_WARN_LIMIT: /* R/W word */ 1484 if (pmdev->pages[index].page_flags & PB_HAS_IIN) { 1485 pmdev->pages[index].iin_oc_warn_limit = pmbus_receive16(pmdev); 1486 } else { 1487 goto passthrough; 1488 } 1489 break; 1490 1491 case PMBUS_POUT_OP_FAULT_LIMIT: /* R/W word */ 1492 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1493 pmdev->pages[index].pout_op_fault_limit = pmbus_receive16(pmdev); 1494 } else { 1495 goto passthrough; 1496 } 1497 break; 1498 1499 case PMBUS_POUT_OP_FAULT_RESPONSE: /* R/W byte */ 1500 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1501 pmdev->pages[index].pout_op_fault_response = pmbus_receive8(pmdev); 1502 } else { 1503 goto passthrough; 1504 } 1505 break; 1506 1507 case PMBUS_POUT_OP_WARN_LIMIT: /* R/W word */ 1508 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1509 pmdev->pages[index].pout_op_warn_limit = pmbus_receive16(pmdev); 1510 } else { 1511 goto passthrough; 1512 } 1513 break; 1514 1515 case PMBUS_PIN_OP_WARN_LIMIT: /* R/W word */ 1516 if (pmdev->pages[index].page_flags & PB_HAS_PIN) { 1517 pmdev->pages[index].pin_op_warn_limit = pmbus_receive16(pmdev); 1518 } else { 1519 goto passthrough; 1520 } 1521 break; 1522 1523 case PMBUS_STATUS_BYTE: /* R/W byte */ 1524 pmdev->pages[index].status_word = pmbus_receive8(pmdev); 1525 break; 1526 1527 case PMBUS_STATUS_WORD: /* R/W word */ 1528 pmdev->pages[index].status_word = pmbus_receive16(pmdev); 1529 break; 1530 1531 case PMBUS_STATUS_VOUT: /* R/W byte */ 1532 if (pmdev->pages[index].page_flags & PB_HAS_VOUT) { 1533 pmdev->pages[index].status_vout = pmbus_receive8(pmdev); 1534 } else { 1535 goto passthrough; 1536 } 1537 break; 1538 1539 case PMBUS_STATUS_IOUT: /* R/W byte */ 1540 if (pmdev->pages[index].page_flags & PB_HAS_IOUT) { 1541 pmdev->pages[index].status_iout = pmbus_receive8(pmdev); 1542 } else { 1543 goto passthrough; 1544 } 1545 break; 1546 1547 case PMBUS_STATUS_INPUT: /* R/W byte */ 1548 pmdev->pages[index].status_input = pmbus_receive8(pmdev); 1549 break; 1550 1551 case PMBUS_STATUS_TEMPERATURE: /* R/W byte */ 1552 if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) { 1553 pmdev->pages[index].status_temperature = pmbus_receive8(pmdev); 1554 } else { 1555 goto passthrough; 1556 } 1557 break; 1558 1559 case PMBUS_STATUS_CML: /* R/W byte */ 1560 pmdev->pages[index].status_cml = pmbus_receive8(pmdev); 1561 break; 1562 1563 case PMBUS_STATUS_OTHER: /* R/W byte */ 1564 pmdev->pages[index].status_other = pmbus_receive8(pmdev); 1565 break; 1566 1567 case PMBUS_STATUS_MFR_SPECIFIC: /* R/W byte */ 1568 pmdev->pages[index].status_mfr_specific = pmbus_receive8(pmdev); 1569 break; 1570 1571 case PMBUS_PAGE_PLUS_READ: /* Block Read-only */ 1572 case PMBUS_CAPABILITY: /* Read-Only byte */ 1573 case PMBUS_COEFFICIENTS: /* Read-only block 5 bytes */ 1574 case PMBUS_READ_EIN: /* Read-Only block 5 bytes */ 1575 case PMBUS_READ_EOUT: /* Read-Only block 5 bytes */ 1576 case PMBUS_READ_VIN: /* Read-Only word */ 1577 case PMBUS_READ_IIN: /* Read-Only word */ 1578 case PMBUS_READ_VCAP: /* Read-Only word */ 1579 case PMBUS_READ_VOUT: /* Read-Only word */ 1580 case PMBUS_READ_IOUT: /* Read-Only word */ 1581 case PMBUS_READ_TEMPERATURE_1: /* Read-Only word */ 1582 case PMBUS_READ_TEMPERATURE_2: /* Read-Only word */ 1583 case PMBUS_READ_TEMPERATURE_3: /* Read-Only word */ 1584 case PMBUS_READ_FAN_SPEED_1: /* Read-Only word */ 1585 case PMBUS_READ_FAN_SPEED_2: /* Read-Only word */ 1586 case PMBUS_READ_FAN_SPEED_3: /* Read-Only word */ 1587 case PMBUS_READ_FAN_SPEED_4: /* Read-Only word */ 1588 case PMBUS_READ_DUTY_CYCLE: /* Read-Only word */ 1589 case PMBUS_READ_FREQUENCY: /* Read-Only word */ 1590 case PMBUS_READ_POUT: /* Read-Only word */ 1591 case PMBUS_READ_PIN: /* Read-Only word */ 1592 case PMBUS_REVISION: /* Read-Only byte */ 1593 case PMBUS_APP_PROFILE_SUPPORT: /* Read-Only block-read */ 1594 case PMBUS_MFR_VIN_MIN: /* Read-Only word */ 1595 case PMBUS_MFR_VIN_MAX: /* Read-Only word */ 1596 case PMBUS_MFR_IIN_MAX: /* Read-Only word */ 1597 case PMBUS_MFR_PIN_MAX: /* Read-Only word */ 1598 case PMBUS_MFR_VOUT_MIN: /* Read-Only word */ 1599 case PMBUS_MFR_VOUT_MAX: /* Read-Only word */ 1600 case PMBUS_MFR_IOUT_MAX: /* Read-Only word */ 1601 case PMBUS_MFR_POUT_MAX: /* Read-Only word */ 1602 case PMBUS_MFR_TAMBIENT_MAX: /* Read-Only word */ 1603 case PMBUS_MFR_TAMBIENT_MIN: /* Read-Only word */ 1604 case PMBUS_MFR_EFFICIENCY_LL: /* Read-Only block 14 bytes */ 1605 case PMBUS_MFR_EFFICIENCY_HL: /* Read-Only block 14 bytes */ 1606 case PMBUS_MFR_PIN_ACCURACY: /* Read-Only byte */ 1607 case PMBUS_IC_DEVICE_ID: /* Read-Only block-read */ 1608 case PMBUS_IC_DEVICE_REV: /* Read-Only block-read */ 1609 qemu_log_mask(LOG_GUEST_ERROR, 1610 "%s: writing to read-only register 0x%02x\n", 1611 __func__, pmdev->code); 1612 break; 1613 1614 passthrough: 1615 /* Unimplimented registers get passed to the device */ 1616 default: 1617 if (pmdc->write_data) { 1618 ret = pmdc->write_data(pmdev, buf, len); 1619 } 1620 break; 1621 } 1622 pmbus_check_limits(pmdev); 1623 pmdev->in_buf_len = 0; 1624 return ret; 1625 } 1626 1627 int pmbus_page_config(PMBusDevice *pmdev, uint8_t index, uint64_t flags) 1628 { 1629 if (!pmdev->pages) { /* allocate memory for pages on first use */ 1630 pmbus_pages_alloc(pmdev); 1631 } 1632 1633 /* The 0xFF page is special for commands applying to all pages */ 1634 if (index == PB_ALL_PAGES) { 1635 for (int i = 0; i < pmdev->num_pages; i++) { 1636 pmdev->pages[i].page_flags = flags; 1637 } 1638 return 0; 1639 } 1640 1641 if (index > pmdev->num_pages - 1) { 1642 qemu_log_mask(LOG_GUEST_ERROR, 1643 "%s: index %u is out of range\n", 1644 __func__, index); 1645 return -1; 1646 } 1647 1648 pmdev->pages[index].page_flags = flags; 1649 1650 return 0; 1651 } 1652 1653 /* TODO: include pmbus page info in vmstate */ 1654 const VMStateDescription vmstate_pmbus_device = { 1655 .name = TYPE_PMBUS_DEVICE, 1656 .version_id = 0, 1657 .minimum_version_id = 0, 1658 .fields = (VMStateField[]) { 1659 VMSTATE_SMBUS_DEVICE(smb, PMBusDevice), 1660 VMSTATE_UINT8(num_pages, PMBusDevice), 1661 VMSTATE_UINT8(code, PMBusDevice), 1662 VMSTATE_UINT8(page, PMBusDevice), 1663 VMSTATE_UINT8(capability, PMBusDevice), 1664 VMSTATE_END_OF_LIST() 1665 } 1666 }; 1667 1668 static void pmbus_device_finalize(Object *obj) 1669 { 1670 PMBusDevice *pmdev = PMBUS_DEVICE(obj); 1671 g_free(pmdev->pages); 1672 } 1673 1674 static void pmbus_device_class_init(ObjectClass *klass, void *data) 1675 { 1676 SMBusDeviceClass *k = SMBUS_DEVICE_CLASS(klass); 1677 1678 k->quick_cmd = pmbus_quick_cmd; 1679 k->write_data = pmbus_write_data; 1680 k->receive_byte = pmbus_receive_byte; 1681 } 1682 1683 static const TypeInfo pmbus_device_type_info = { 1684 .name = TYPE_PMBUS_DEVICE, 1685 .parent = TYPE_SMBUS_DEVICE, 1686 .instance_size = sizeof(PMBusDevice), 1687 .instance_finalize = pmbus_device_finalize, 1688 .abstract = true, 1689 .class_size = sizeof(PMBusDeviceClass), 1690 .class_init = pmbus_device_class_init, 1691 }; 1692 1693 static void pmbus_device_register_types(void) 1694 { 1695 type_register_static(&pmbus_device_type_info); 1696 } 1697 1698 type_init(pmbus_device_register_types) 1699