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 /* acpi match */
  26 struct snd_soc_acpi_mach *
  27 snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines);
  28
  29 bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  30                                     struct snd_soc_acpi_package_context *ctx);
  31
  32 /* check all codecs */
  33 struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
  34
  35 #else
  36 /* acpi match */
  37 static inline struct snd_soc_acpi_mach *
  38 snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
  39 {
  40         return NULL;
  41 }
  42
  43 static inline bool
  44 snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  45                                    struct snd_soc_acpi_package_context *ctx)
  46 {
  47         return false;
  48 }
  49
  50 /* check all codecs */
  51 static inline struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
  52 {
  53         return NULL;
  54 }
  55 #endif
  56
  57 /**
  58  * snd_soc_acpi_mach_params: interface for machine driver configuration
  59  *
  60  * @acpi_ipc_irq_index: used for BYT-CR detection
  61  * @platform: string used for HDaudio codec support
  62  * @codec_mask: used for HDAudio support
  63  * @common_hdmi_codec_drv: use commom HDAudio HDMI codec driver
  64  */
  65 struct snd_soc_acpi_mach_params {
  66         u32 acpi_ipc_irq_index;
  67         const char *platform;
  68         u32 codec_mask;
  69         u32 dmic_num;
  70         bool common_hdmi_codec_drv;
  71 };
  72
  73 /**
  74  * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
  75  * related to the hardware, except for the firmware and topology file names.
  76  * A platform supported by legacy and Sound Open Firmware (SOF) would expose
  77  * all firmware/topology related fields.
  78  *
  79  * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
  80  * @drv_name: machine driver name
  81  * @fw_filename: firmware file name. Used when SOF is not enabled.
  82  * @board: board name
  83  * @machine_quirk: pointer to quirk, usually based on DMI information when
  84  * ACPI ID alone is not sufficient, wrong or misleading
  85  * @quirk_data: data used to uniquely identify a machine, usually a list of
  86  * audio codecs whose presence if checked with ACPI
  87  * @pdata: intended for platform data or machine specific-ops. This structure
  88  *  is not constant since this field may be updated at run-time
  89  * @sof_fw_filename: Sound Open Firmware file name, if enabled
  90  * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
  91  */
  92 /* Descriptor for SST ASoC machine driver */
  93 struct snd_soc_acpi_mach {
  94         const u8 id[ACPI_ID_LEN];
  95         const char *drv_name;
  96         const char *fw_filename;
  97         const char *board;
  98         struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
  99         const void *quirk_data;
 100         void *pdata;
 101         struct snd_soc_acpi_mach_params mach_params;
 102         const char *sof_fw_filename;
 103         const char *sof_tplg_filename;
 104 };
 105
 106 #define SND_SOC_ACPI_MAX_CODECS 3
 107
 108 /**
 109  * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
 110  * apart from the matched one, this data will be passed to the quirk function
 111  * to match with the ACPI detected devices
 112  *
 113  * @num_codecs: number of secondary codecs used in the platform
 114  * @codecs: holds the codec IDs
 115  *
 116  */
 117 struct snd_soc_acpi_codecs {
 118         int num_codecs;
 119         u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
 120 };
 121
 122 #endif