17730bb13SKuninori Morimoto // SPDX-License-Identifier: GPL-2.0 27730bb13SKuninori Morimoto // 37730bb13SKuninori Morimoto // soc-apci.c - support for ACPI enumeration. 47730bb13SKuninori Morimoto // 57730bb13SKuninori Morimoto // Copyright (c) 2013-15, Intel Corporation. 67feb2f78SPierre-Louis Bossart 77feb2f78SPierre-Louis Bossart #include <sound/soc-acpi.h> 87feb2f78SPierre-Louis Bossart 97feb2f78SPierre-Louis Bossart struct snd_soc_acpi_mach * 107feb2f78SPierre-Louis Bossart snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) 117feb2f78SPierre-Louis Bossart { 127feb2f78SPierre-Louis Bossart struct snd_soc_acpi_mach *mach; 13a3e620f8SKeyon Jie struct snd_soc_acpi_mach *mach_alt; 147feb2f78SPierre-Louis Bossart 157feb2f78SPierre-Louis Bossart for (mach = machines; mach->id[0]; mach++) { 160d5ea120SJeremy Cline if (acpi_dev_present(mach->id, NULL, -1)) { 17a3e620f8SKeyon Jie if (mach->machine_quirk) { 18a3e620f8SKeyon Jie mach_alt = mach->machine_quirk(mach); 19a3e620f8SKeyon Jie if (!mach_alt) 20a3e620f8SKeyon Jie continue; /* not full match, ignore */ 21a3e620f8SKeyon Jie mach = mach_alt; 22a3e620f8SKeyon Jie } 23a3e620f8SKeyon Jie 247feb2f78SPierre-Louis Bossart return mach; 257feb2f78SPierre-Louis Bossart } 267feb2f78SPierre-Louis Bossart } 277feb2f78SPierre-Louis Bossart return NULL; 287feb2f78SPierre-Louis Bossart } 297feb2f78SPierre-Louis Bossart EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine); 307feb2f78SPierre-Louis Bossart 317feb2f78SPierre-Louis Bossart static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level, 327feb2f78SPierre-Louis Bossart void *context, void **ret) 337feb2f78SPierre-Louis Bossart { 347feb2f78SPierre-Louis Bossart struct acpi_device *adev; 357feb2f78SPierre-Louis Bossart acpi_status status = AE_OK; 367feb2f78SPierre-Louis Bossart struct snd_soc_acpi_package_context *pkg_ctx = context; 377feb2f78SPierre-Louis Bossart 387feb2f78SPierre-Louis Bossart pkg_ctx->data_valid = false; 397feb2f78SPierre-Louis Bossart 407feb2f78SPierre-Louis Bossart if (acpi_bus_get_device(handle, &adev)) 417feb2f78SPierre-Louis Bossart return AE_OK; 427feb2f78SPierre-Louis Bossart 437feb2f78SPierre-Louis Bossart if (adev->status.present && adev->status.functional) { 447feb2f78SPierre-Louis Bossart struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 457feb2f78SPierre-Louis Bossart union acpi_object *myobj = NULL; 467feb2f78SPierre-Louis Bossart 477feb2f78SPierre-Louis Bossart status = acpi_evaluate_object_typed(handle, pkg_ctx->name, 487feb2f78SPierre-Louis Bossart NULL, &buffer, 497feb2f78SPierre-Louis Bossart ACPI_TYPE_PACKAGE); 507feb2f78SPierre-Louis Bossart if (ACPI_FAILURE(status)) 517feb2f78SPierre-Louis Bossart return AE_OK; 527feb2f78SPierre-Louis Bossart 537feb2f78SPierre-Louis Bossart myobj = buffer.pointer; 547feb2f78SPierre-Louis Bossart if (!myobj || myobj->package.count != pkg_ctx->length) { 557feb2f78SPierre-Louis Bossart kfree(buffer.pointer); 567feb2f78SPierre-Louis Bossart return AE_OK; 577feb2f78SPierre-Louis Bossart } 587feb2f78SPierre-Louis Bossart 597feb2f78SPierre-Louis Bossart status = acpi_extract_package(myobj, 607feb2f78SPierre-Louis Bossart pkg_ctx->format, pkg_ctx->state); 617feb2f78SPierre-Louis Bossart if (ACPI_FAILURE(status)) { 627feb2f78SPierre-Louis Bossart kfree(buffer.pointer); 637feb2f78SPierre-Louis Bossart return AE_OK; 647feb2f78SPierre-Louis Bossart } 657feb2f78SPierre-Louis Bossart 667feb2f78SPierre-Louis Bossart kfree(buffer.pointer); 677feb2f78SPierre-Louis Bossart pkg_ctx->data_valid = true; 687feb2f78SPierre-Louis Bossart return AE_CTRL_TERMINATE; 697feb2f78SPierre-Louis Bossart } 707feb2f78SPierre-Louis Bossart 717feb2f78SPierre-Louis Bossart return AE_OK; 727feb2f78SPierre-Louis Bossart } 737feb2f78SPierre-Louis Bossart 747feb2f78SPierre-Louis Bossart bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN], 757feb2f78SPierre-Louis Bossart struct snd_soc_acpi_package_context *ctx) 767feb2f78SPierre-Louis Bossart { 777feb2f78SPierre-Louis Bossart acpi_status status; 787feb2f78SPierre-Louis Bossart 797feb2f78SPierre-Louis Bossart status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL); 807feb2f78SPierre-Louis Bossart 817feb2f78SPierre-Louis Bossart if (ACPI_FAILURE(status) || !ctx->data_valid) 827feb2f78SPierre-Louis Bossart return false; 837feb2f78SPierre-Louis Bossart 847feb2f78SPierre-Louis Bossart return true; 857feb2f78SPierre-Louis Bossart } 867feb2f78SPierre-Louis Bossart EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid); 877feb2f78SPierre-Louis Bossart 887feb2f78SPierre-Louis Bossart struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg) 897feb2f78SPierre-Louis Bossart { 907feb2f78SPierre-Louis Bossart struct snd_soc_acpi_mach *mach = arg; 917feb2f78SPierre-Louis Bossart struct snd_soc_acpi_codecs *codec_list = 927feb2f78SPierre-Louis Bossart (struct snd_soc_acpi_codecs *) mach->quirk_data; 937feb2f78SPierre-Louis Bossart int i; 947feb2f78SPierre-Louis Bossart 957feb2f78SPierre-Louis Bossart if (mach->quirk_data == NULL) 967feb2f78SPierre-Louis Bossart return mach; 977feb2f78SPierre-Louis Bossart 987feb2f78SPierre-Louis Bossart for (i = 0; i < codec_list->num_codecs; i++) { 990d5ea120SJeremy Cline if (!acpi_dev_present(codec_list->codecs[i], NULL, -1)) 1007feb2f78SPierre-Louis Bossart return NULL; 1017feb2f78SPierre-Louis Bossart } 1027feb2f78SPierre-Louis Bossart 1037feb2f78SPierre-Louis Bossart return mach; 1047feb2f78SPierre-Louis Bossart } 1057feb2f78SPierre-Louis Bossart EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list); 1067feb2f78SPierre-Louis Bossart 1077feb2f78SPierre-Louis Bossart MODULE_LICENSE("GPL v2"); 1087feb2f78SPierre-Louis Bossart MODULE_DESCRIPTION("ALSA SoC ACPI module"); 109