include/sound/soc-acpi.h

   1 /* SPDX-License-Identifier: GPL-2.0-only
   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  * @link_mask: links enabled on the board
  65  * @links: array of link _ADR descriptors, null terminated
  66  */
  67 struct snd_soc_acpi_mach_params {
  68         u32 acpi_ipc_irq_index;
  69         const char *platform;
  70         u32 codec_mask;
  71         u32 dmic_num;
  72         bool common_hdmi_codec_drv;
  73         u32 link_mask;
  74         const struct snd_soc_acpi_link_adr *links;
  75 };
  76
  77 /**
  78  * snd_soc_acpi_endpoint - endpoint descriptor
  79  * @num: endpoint number (mandatory, unique per device)
  80  * @aggregated: 0 (independent) or 1 (logically grouped)
  81  * @group_position: zero-based order (only when @aggregated is 1)
  82  * @group_id: platform-unique group identifier (only when @aggregrated is 1)
  83  */
  84 struct snd_soc_acpi_endpoint {
  85         u8 num;
  86         u8 aggregated;
  87         u8 group_position;
  88         u8 group_id;
  89 };
  90
  91 /**
  92  * snd_soc_acpi_adr_device - descriptor for _ADR-enumerated device
  93  * @adr: 64 bit ACPI _ADR value
  94  * @num_endpoints: number of endpoints for this device
  95  * @endpoints: array of endpoints
  96  * @name_prefix: string used for codec controls
  97  */
  98 struct snd_soc_acpi_adr_device {
  99         const u64 adr;
 100         const u8 num_endpoints;
 101         const struct snd_soc_acpi_endpoint *endpoints;
 102         const char *name_prefix;
 103 };
 104
 105 /**
 106  * snd_soc_acpi_link_adr - ACPI-based list of _ADR enumerated devices
 107  * @mask: one bit set indicates the link this list applies to
 108  * @num_adr: ARRAY_SIZE of devices
 109  * @adr_d: array of devices
 110  *
 111  * The number of devices per link can be more than 1, e.g. in SoundWire
 112  * multi-drop configurations.
 113  */
 114
 115 struct snd_soc_acpi_link_adr {
 116         const u32 mask;
 117         const u32 num_adr;
 118         const struct snd_soc_acpi_adr_device *adr_d;
 119 };
 120
 121 /**
 122  * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
 123  * related to the hardware, except for the firmware and topology file names.
 124  * A platform supported by legacy and Sound Open Firmware (SOF) would expose
 125  * all firmware/topology related fields.
 126  *
 127  * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
 128  * @link_mask: describes required board layout, e.g. for SoundWire.
 129  * @links: array of link _ADR descriptors, null terminated.
 130  * @drv_name: machine driver name
 131  * @fw_filename: firmware file name. Used when SOF is not enabled.
 132  * @board: board name
 133  * @machine_quirk: pointer to quirk, usually based on DMI information when
 134  * ACPI ID alone is not sufficient, wrong or misleading
 135  * @quirk_data: data used to uniquely identify a machine, usually a list of
 136  * audio codecs whose presence if checked with ACPI
 137  * @pdata: intended for platform data or machine specific-ops. This structure
 138  *  is not constant since this field may be updated at run-time
 139  * @sof_fw_filename: Sound Open Firmware file name, if enabled
 140  * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
 141  */
 142 /* Descriptor for SST ASoC machine driver */
 143 struct snd_soc_acpi_mach {
 144         const u8 id[ACPI_ID_LEN];
 145         const u32 link_mask;
 146         const struct snd_soc_acpi_link_adr *links;
 147         const char *drv_name;
 148         const char *fw_filename;
 149         const char *board;
 150         struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
 151         const void *quirk_data;
 152         void *pdata;
 153         struct snd_soc_acpi_mach_params mach_params;
 154         const char *sof_fw_filename;
 155         const char *sof_tplg_filename;
 156 };
 157
 158 #define SND_SOC_ACPI_MAX_CODECS 3
 159
 160 /**
 161  * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
 162  * apart from the matched one, this data will be passed to the quirk function
 163  * to match with the ACPI detected devices
 164  *
 165  * @num_codecs: number of secondary codecs used in the platform
 166  * @codecs: holds the codec IDs
 167  *
 168  */
 169 struct snd_soc_acpi_codecs {
 170         int num_codecs;
 171         u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
 172 };
 173
 174 static inline bool snd_soc_acpi_sof_parent(struct device *dev)
 175 {
 176         return dev->parent && dev->parent->driver && dev->parent->driver->name &&
 177                 !strcmp(dev->parent->driver->name, "sof-audio-acpi");
 178 }
 179
 180 #endif