include/sound/soc-acpi.h

   1 /* SPDX-License-Identifier: GPL-2.0
   2  *
   3  * Copyright (C) 2013-15, Intel Corporation. All rights reserved.
   4  */
   5
   6 #ifndef __LINUX_SND_SOC_ACPI_H
   7 #define __LINUX_SND_SOC_ACPI_H
   8
   9 #include <linux/stddef.h>
  10 #include <linux/acpi.h>
  11 #include <linux/mod_devicetable.h>
  12
  13 struct snd_soc_acpi_package_context {
  14         char *name;           /* package name */
  15         int length;           /* number of elements */
  16         struct acpi_buffer *format;
  17         struct acpi_buffer *state;
  18         bool data_valid;
  19 };
  20
  21 /* codec name is used in DAIs is i2c-<HID>:00 with HID being 8 chars */
  22 #define SND_ACPI_I2C_ID_LEN (4 + ACPI_ID_LEN + 3 + 1)
  23
  24 #if IS_ENABLED(CONFIG_ACPI)
  25 bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  26                                     struct snd_soc_acpi_package_context *ctx);
  27 #else
  28 static inline bool
  29 snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  30                                    struct snd_soc_acpi_package_context *ctx)
  31 {
  32         return false;
  33 }
  34 #endif
  35
  36 /* acpi match */
  37 struct snd_soc_acpi_mach *
  38 snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines);
  39
  40 /**
  41  * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
  42  * related to the hardware, except for the firmware and topology file names.
  43  * A platform supported by legacy and Sound Open Firmware (SOF) would expose
  44  * all firmware/topology related fields.
  45  *
  46  * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
  47  * @drv_name: machine driver name
  48  * @fw_filename: firmware file name. Used when SOF is not enabled.
  49  * @board: board name
  50  * @machine_quirk: pointer to quirk, usually based on DMI information when
  51  * ACPI ID alone is not sufficient, wrong or misleading
  52  * @quirk_data: data used to uniquely identify a machine, usually a list of
  53  * audio codecs whose presence if checked with ACPI
  54  * @pdata: intended for platform data or machine specific-ops. This structure
  55  *  is not constant since this field may be updated at run-time
  56  * @sof_fw_filename: Sound Open Firmware file name, if enabled
  57  * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
  58  * @asoc_plat_name: ASoC platform name, used for binding machine drivers
  59  * if non NULL
  60  * @new_mach_data: machine driver private data fixup
  61  */
  62 /* Descriptor for SST ASoC machine driver */
  63 struct snd_soc_acpi_mach {
  64         const u8 id[ACPI_ID_LEN];
  65         const char *drv_name;
  66         const char *fw_filename;
  67         const char *board;
  68         struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
  69         const void *quirk_data;
  70         void *pdata;
  71         const char *sof_fw_filename;
  72         const char *sof_tplg_filename;
  73         const char *asoc_plat_name;
  74         struct platform_device * (*new_mach_data)(void *pdata);
  75 };
  76
  77 #define SND_SOC_ACPI_MAX_CODECS 3
  78
  79 /**
  80  * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
  81  * apart from the matched one, this data will be passed to the quirk function
  82  * to match with the ACPI detected devices
  83  *
  84  * @num_codecs: number of secondary codecs used in the platform
  85  * @codecs: holds the codec IDs
  86  *
  87  */
  88 struct snd_soc_acpi_codecs {
  89         int num_codecs;
  90         u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
  91 };
  92
  93 /* check all codecs */
  94 struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
  95
  96 #endif