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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 | // SPDX-License-Identifier: GPL-2.0+ /* * SCMI Base protocol as U-Boot device * * Copyright (C) 2023 Linaro Limited * author: AKASHI Takahiro <takahiro.akashi@linaro.org> */ #include <dm.h> #include <scmi_agent.h> #include <scmi_protocols.h> #include <stdlib.h> #include <string.h> #include <asm/types.h> #include <dm/device_compat.h> #include <linux/kernel.h> /** * scmi_generic_protocol_version - get protocol version * @dev: SCMI device * @id: SCMI protocol ID * @version: Pointer to SCMI protocol version * * Obtain the protocol version number in @version. * * Return: 0 on success, error code on failure */ int scmi_generic_protocol_version(struct udevice *dev, enum scmi_std_protocol id, u32 *version) { struct scmi_protocol_version_out out; struct scmi_msg msg = { .protocol_id = id, .message_id = SCMI_PROTOCOL_VERSION, .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *version = out.version; return 0; } /** * scmi_base_protocol_version_int - get Base protocol version * @dev: SCMI device * @version: Pointer to SCMI protocol version * * Obtain the protocol version number in @version for Base protocol. * * Return: 0 on success, error code on failure */ static int scmi_base_protocol_version_int(struct udevice *dev, u32 *version) { return scmi_generic_protocol_version(dev, SCMI_PROTOCOL_ID_BASE, version); } /** * scmi_protocol_attrs_int - get protocol attributes * @dev: SCMI device * @num_agents: Number of SCMI agents * @num_protocols: Number of SCMI protocols * * Obtain the protocol attributes, the number of agents and the number * of protocols, in @num_agents and @num_protocols respectively, that * the device provides. * * Return: 0 on success, error code on failure */ static int scmi_protocol_attrs_int(struct udevice *dev, u32 *num_agents, u32 *num_protocols) { struct scmi_protocol_attrs_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_PROTOCOL_ATTRIBUTES, .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *num_agents = SCMI_PROTOCOL_ATTRS_NUM_AGENTS(out.attributes); *num_protocols = SCMI_PROTOCOL_ATTRS_NUM_PROTOCOLS(out.attributes); return 0; } /** * scmi_protocol_message_attrs_int - get message-specific attributes * @dev: SCMI device * @message_id: SCMI message ID * @attributes: Message-specific attributes * * Obtain the message-specific attributes in @attributes. * This command succeeds if the message is implemented and available. * * Return: 0 on success, error code on failure */ static int scmi_protocol_message_attrs_int(struct udevice *dev, u32 message_id, u32 *attributes) { struct scmi_protocol_msg_attrs_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_PROTOCOL_MESSAGE_ATTRIBUTES, .in_msg = (u8 *)&message_id, .in_msg_sz = sizeof(message_id), .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *attributes = out.attributes; return 0; } /** * scmi_base_discover_vendor_int - get vendor name * @dev: SCMI device * @vendor: Pointer to vendor name * * Obtain the vendor's name in @vendor. * It is a caller's responsibility to free @vendor. * * Return: 0 on success, error code on failure */ static int scmi_base_discover_vendor_int(struct udevice *dev, u8 **vendor) { struct scmi_base_discover_vendor_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_DISCOVER_VENDOR, .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; if (!vendor) return -EINVAL; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *vendor = strdup(out.vendor_identifier); if (!*vendor) return -ENOMEM; return 0; } /** * scmi_base_discover_sub_vendor_int - get sub-vendor name * @dev: SCMI device * @sub_vendor: Pointer to sub-vendor name * * Obtain the sub-vendor's name in @sub_vendor. * It is a caller's responsibility to free @sub_vendor. * * Return: 0 on success, error code on failure */ static int scmi_base_discover_sub_vendor_int(struct udevice *dev, u8 **sub_vendor) { struct scmi_base_discover_vendor_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_DISCOVER_SUB_VENDOR, .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; if (!sub_vendor) return -EINVAL; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *sub_vendor = strdup(out.vendor_identifier); if (!*sub_vendor) return -ENOMEM; return 0; } /** * scmi_base_discover_impl_version_int - get implementation version * @dev: SCMI device * @impl_version: Pointer to implementation version * * Obtain the implementation version number in @impl_version. * * Return: 0 on success, error code on failure */ static int scmi_base_discover_impl_version_int(struct udevice *dev, u32 *impl_version) { struct scmi_base_discover_impl_version_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_DISCOVER_IMPL_VERSION, .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); *impl_version = out.impl_version; return 0; } /** * scmi_base_discover_list_protocols_int - get list of protocols * @dev: SCMI device * @protocols: Pointer to array of SCMI protocols * * Obtain the list of protocols provided in @protocols. * The number of elements in @protocols always match to the number of * protocols returned by smci_protocol_attrs() when this function succeeds. * It is a caller's responsibility to free @protocols. * * Return: the number of protocols in @protocols on success, error code on * failure */ static int scmi_base_discover_list_protocols_int(struct udevice *dev, u8 **protocols) { struct scmi_base_discover_list_protocols_out out; int cur; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_DISCOVER_LIST_PROTOCOLS, .in_msg = (u8 *)&cur, .in_msg_sz = sizeof(cur), .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; u32 num_agents, num_protocols; u8 *buf; int i, ret; ret = scmi_base_protocol_attrs(dev, &num_agents, &num_protocols); if (ret) return ret; buf = calloc(sizeof(u8), num_protocols); if (!buf) return -ENOMEM; cur = 0; do { ret = devm_scmi_process_msg(dev, &msg); if (ret) goto err; if (out.status) { ret = scmi_to_linux_errno(out.status); goto err; } for (i = 0; i < out.num_protocols; i++, cur++) buf[cur] = out.protocols[i / 4] >> ((i % 4) * 8); } while (cur < num_protocols); *protocols = buf; return num_protocols; err: free(buf); return ret; } /** * scmi_base_discover_agent_int - identify agent * @dev: SCMI device * @agent_id: SCMI agent ID * @ret_agent_id: Pointer to SCMI agent ID * @name: Pointer to SCMI agent name * * Obtain the agent's name in @name. If @agent_id is equal to 0xffffffff, * this function returns the caller's agent id in @ret_agent_id. * It is a caller's responsibility to free @name. * * Return: 0 on success, error code on failure */ static int scmi_base_discover_agent_int(struct udevice *dev, u32 agent_id, u32 *ret_agent_id, u8 **name) { struct scmi_base_discover_agent_out out; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_DISCOVER_AGENT, .in_msg = (u8 *)&agent_id, .in_msg_sz = sizeof(agent_id), .out_msg = (u8 *)&out, .out_msg_sz = sizeof(out), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (out.status) return scmi_to_linux_errno(out.status); if (ret_agent_id) *ret_agent_id = out.agent_id; if (name) { *name = strdup(out.name); if (!*name) return -ENOMEM; } return 0; } /** * scmi_base_set_device_permissions_int - configure access permission to device * @dev: SCMI device * @agent_id: SCMI agent ID * @device_id: ID of device to access * @flags: A set of flags * * Ask for allowing or denying access permission to the device, @device_id. * The meaning of @flags is defined in SCMI specification. * * Return: 0 on success, error code on failure */ static int scmi_base_set_device_permissions_int(struct udevice *dev, u32 agent_id, u32 device_id, u32 flags) { struct scmi_base_set_device_permissions_in in = { .agent_id = agent_id, .device_id = device_id, .flags = flags, }; s32 status; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_SET_DEVICE_PERMISSIONS, .in_msg = (u8 *)&in, .in_msg_sz = sizeof(in), .out_msg = (u8 *)&status, .out_msg_sz = sizeof(status), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (status) return scmi_to_linux_errno(status); return 0; } /** * scmi_base_set_protocol_permissions_int - configure access permission to * protocol on device * @dev: SCMI device * @agent_id: SCMI agent ID * @device_id: ID of device to access * @command_id: SCMI command ID * @flags: A set of flags * * Ask for allowing or denying access permission to the protocol, @command_id, * on the device, @device_id. * The meaning of @flags is defined in SCMI specification. * * Return: 0 on success, error code on failure */ static int scmi_base_set_protocol_permissions_int(struct udevice *dev, u32 agent_id, u32 device_id, u32 command_id, u32 flags) { struct scmi_base_set_protocol_permissions_in in = { .agent_id = agent_id, .device_id = device_id, .command_id = command_id, .flags = flags, }; s32 status; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_SET_PROTOCOL_PERMISSIONS, .in_msg = (u8 *)&in, .in_msg_sz = sizeof(in), .out_msg = (u8 *)&status, .out_msg_sz = sizeof(status), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (status) return scmi_to_linux_errno(status); return 0; } /** * scmi_base_reset_agent_configuration_int - reset resource settings * @dev: SCMI device * @agent_id: SCMI agent ID * @flags: A set of flags * * Reset all the resource settings against @agent_id. * The meaning of @flags is defined in SCMI specification. * * Return: 0 on success, error code on failure */ static int scmi_base_reset_agent_configuration_int(struct udevice *dev, u32 agent_id, u32 flags) { struct scmi_base_reset_agent_configuration_in in = { .agent_id = agent_id, .flags = flags, }; s32 status; struct scmi_msg msg = { .protocol_id = SCMI_PROTOCOL_ID_BASE, .message_id = SCMI_BASE_RESET_AGENT_CONFIGURATION, .in_msg = (u8 *)&in, .in_msg_sz = sizeof(in), .out_msg = (u8 *)&status, .out_msg_sz = sizeof(status), }; int ret; ret = devm_scmi_process_msg(dev, &msg); if (ret) return ret; if (status) return scmi_to_linux_errno(status); return 0; } /** * scmi_base_probe - probe base protocol device * @dev: SCMI device * * Probe the device for SCMI base protocol and initialize the private data. * * Return: 0 on success, error code on failure */ static int scmi_base_probe(struct udevice *dev) { u32 version; int ret; ret = devm_scmi_of_get_channel(dev); if (ret) { dev_err(dev, "get_channel failed\n"); return ret; } ret = scmi_base_protocol_version_int(dev, &version); if (ret) { dev_err(dev, "getting protocol version failed\n"); return ret; } if (version < SCMI_BASE_PROTOCOL_VERSION) return -EINVAL; return ret; } static struct scmi_base_ops scmi_base_ops = { /* Commands */ .protocol_version = scmi_base_protocol_version_int, .protocol_attrs = scmi_protocol_attrs_int, .protocol_message_attrs = scmi_protocol_message_attrs_int, .base_discover_vendor = scmi_base_discover_vendor_int, .base_discover_sub_vendor = scmi_base_discover_sub_vendor_int, .base_discover_impl_version = scmi_base_discover_impl_version_int, .base_discover_list_protocols = scmi_base_discover_list_protocols_int, .base_discover_agent = scmi_base_discover_agent_int, .base_notify_errors = NULL, .base_set_device_permissions = scmi_base_set_device_permissions_int, .base_set_protocol_permissions = scmi_base_set_protocol_permissions_int, .base_reset_agent_configuration = scmi_base_reset_agent_configuration_int, }; int scmi_base_protocol_version(struct udevice *dev, u32 *version) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->protocol_version) return (*ops->protocol_version)(dev, version); return -EOPNOTSUPP; } int scmi_base_protocol_attrs(struct udevice *dev, u32 *num_agents, u32 *num_protocols) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->protocol_attrs) return (*ops->protocol_attrs)(dev, num_agents, num_protocols); return -EOPNOTSUPP; } int scmi_base_protocol_message_attrs(struct udevice *dev, u32 message_id, u32 *attributes) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->protocol_message_attrs) return (*ops->protocol_message_attrs)(dev, message_id, attributes); return -EOPNOTSUPP; } int scmi_base_discover_vendor(struct udevice *dev, u8 **vendor) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_discover_vendor) return (*ops->base_discover_vendor)(dev, vendor); return -EOPNOTSUPP; } int scmi_base_discover_sub_vendor(struct udevice *dev, u8 **sub_vendor) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_discover_sub_vendor) return (*ops->base_discover_sub_vendor)(dev, sub_vendor); return -EOPNOTSUPP; } int scmi_base_discover_impl_version(struct udevice *dev, u32 *impl_version) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_discover_impl_version) return (*ops->base_discover_impl_version)(dev, impl_version); return -EOPNOTSUPP; } int scmi_base_discover_list_protocols(struct udevice *dev, u8 **protocols) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_discover_list_protocols) return (*ops->base_discover_list_protocols)(dev, protocols); return -EOPNOTSUPP; } int scmi_base_discover_agent(struct udevice *dev, u32 agent_id, u32 *ret_agent_id, u8 **name) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_discover_agent) return (*ops->base_discover_agent)(dev, agent_id, ret_agent_id, name); return -EOPNOTSUPP; } int scmi_base_notify_errors(struct udevice *dev, u32 enable) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_notify_errors) return (*ops->base_notify_errors)(dev, enable); return -EOPNOTSUPP; } int scmi_base_set_device_permissions(struct udevice *dev, u32 agent_id, u32 device_id, u32 flags) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_set_device_permissions) return (*ops->base_set_device_permissions)(dev, agent_id, device_id, flags); return -EOPNOTSUPP; } int scmi_base_set_protocol_permissions(struct udevice *dev, u32 agent_id, u32 device_id, u32 command_id, u32 flags) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_set_protocol_permissions) return (*ops->base_set_protocol_permissions)(dev, agent_id, device_id, command_id, flags); return -EOPNOTSUPP; } int scmi_base_reset_agent_configuration(struct udevice *dev, u32 agent_id, u32 flags) { const struct scmi_base_ops *ops = device_get_ops(dev); if (ops->base_reset_agent_configuration) return (*ops->base_reset_agent_configuration)(dev, agent_id, flags); return -EOPNOTSUPP; } U_BOOT_DRIVER(scmi_base_drv) = { .id = UCLASS_SCMI_BASE, .name = "scmi_base_drv", .ops = &scmi_base_ops, .probe = scmi_base_probe, }; UCLASS_DRIVER(scmi_base) = { .id = UCLASS_SCMI_BASE, .name = "scmi_base", }; |