include/sound/soc-acpi.h

   1 /*
   2  * Copyright (C) 2013-15, Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License version
   6  * 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  */
  14
  15 #ifndef __LINUX_SND_SOC_ACPI_H
  16 #define __LINUX_SND_SOC_ACPI_H
  17
  18 #include <linux/stddef.h>
  19 #include <linux/acpi.h>
  20 #include <linux/mod_devicetable.h>
  21
  22 struct snd_soc_acpi_package_context {
  23         char *name;           /* package name */
  24         int length;           /* number of elements */
  25         struct acpi_buffer *format;
  26         struct acpi_buffer *state;
  27         bool data_valid;
  28 };
  29
  30 /* codec name is used in DAIs is i2c-<HID>:00 with HID being 8 chars */
  31 #define SND_ACPI_I2C_ID_LEN (4 + ACPI_ID_LEN + 3 + 1)
  32
  33 #if IS_ENABLED(CONFIG_ACPI)
  34 bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  35                                     struct snd_soc_acpi_package_context *ctx);
  36 #else
  37 static inline bool
  38 snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
  39                                    struct snd_soc_acpi_package_context *ctx)
  40 {
  41         return false;
  42 }
  43 #endif
  44
  45 /* acpi match */
  46 struct snd_soc_acpi_mach *
  47 snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines);
  48
  49 /**
  50  * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
  51  * related to the hardware, except for the firmware and topology file names.
  52  * A platform supported by legacy and Sound Open Firmware (SOF) would expose
  53  * all firmware/topology related fields.
  54  *
  55  * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
  56  * @drv_name: machine driver name
  57  * @fw_filename: firmware file name. Used when SOF is not enabled.
  58  * @board: board name
  59  * @machine_quirk: pointer to quirk, usually based on DMI information when
  60  * ACPI ID alone is not sufficient, wrong or misleading
  61  * @quirk_data: data used to uniquely identify a machine, usually a list of
  62  * audio codecs whose presence if checked with ACPI
  63  * @pdata: intended for platform data or machine specific-ops. This structure
  64  *  is not constant since this field may be updated at run-time
  65  * @sof_fw_filename: Sound Open Firmware file name, if enabled
  66  * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
  67  * @asoc_plat_name: ASoC platform name, used for binding machine drivers
  68  * if non NULL
  69  * @new_mach_data: machine driver private data fixup
  70  */
  71 /* Descriptor for SST ASoC machine driver */
  72 struct snd_soc_acpi_mach {
  73         const u8 id[ACPI_ID_LEN];
  74         const char *drv_name;
  75         const char *fw_filename;
  76         const char *board;
  77         struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
  78         const void *quirk_data;
  79         void *pdata;
  80         const char *sof_fw_filename;
  81         const char *sof_tplg_filename;
  82         const char *asoc_plat_name;
  83         struct platform_device * (*new_mach_data)(void *pdata);
  84 };
  85
  86 #define SND_SOC_ACPI_MAX_CODECS 3
  87
  88 /**
  89  * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
  90  * apart from the matched one, this data will be passed to the quirk function
  91  * to match with the ACPI detected devices
  92  *
  93  * @num_codecs: number of secondary codecs used in the platform
  94  * @codecs: holds the codec IDs
  95  *
  96  */
  97 struct snd_soc_acpi_codecs {
  98         int num_codecs;
  99         u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
 100 };
 101
 102 /* check all codecs */
 103 struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
 104
 105 #endif