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/*
* Copyright (C) 2013-15, Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __LINUX_SND_SOC_ACPI_H
#define __LINUX_SND_SOC_ACPI_H
#include <linux/stddef.h>
#include <linux/acpi.h>
struct snd_soc_acpi_package_context {
char *name; /* package name */
int length; /* number of elements */
struct acpi_buffer *format;
struct acpi_buffer *state;
bool data_valid;
};
/* codec name is used in DAIs is i2c-<HID>:00 with HID being 8 chars */
#define SND_ACPI_I2C_ID_LEN (4 + ACPI_ID_LEN + 3 + 1)
#if IS_ENABLED(CONFIG_ACPI)
/* translation fron HID to I2C name, needed for DAI codec_name */
const char *snd_soc_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN]);
bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
struct snd_soc_acpi_package_context *ctx);
#else
static inline const char *
snd_soc_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN])
{
return NULL;
}
static inline bool
snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
struct snd_soc_acpi_package_context *ctx)
{
return false;
}
#endif
/* acpi match */
struct snd_soc_acpi_mach *
snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines);
/* acpi check hid */
bool snd_soc_acpi_check_hid(const u8 hid[ACPI_ID_LEN]);
/**
* snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
* related to the hardware, except for the firmware and topology file names.
* A platform supported by legacy and Sound Open Firmware (SOF) would expose
* all firmware/topology related fields.
*
* @id: ACPI ID (usually the codec's) used to find a matching machine driver.
* @drv_name: machine driver name
* @fw_filename: firmware file name. Used when SOF is not enabled.
* @board: board name
* @machine_quirk: pointer to quirk, usually based on DMI information when
* ACPI ID alone is not sufficient, wrong or misleading
* @quirk_data: data used to uniquely identify a machine, usually a list of
* audio codecs whose presence if checked with ACPI
* @pdata: intended for platform data or machine specific-ops. This structure
* is not constant since this field may be updated at run-time
* @sof_fw_filename: Sound Open Firmware file name, if enabled
* @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
* @asoc_plat_name: ASoC platform name, used for binding machine drivers
* if non NULL
* @new_mach_data: machine driver private data fixup
*/
/* Descriptor for SST ASoC machine driver */
struct snd_soc_acpi_mach {
const u8 id[ACPI_ID_LEN];
const char *drv_name;
const char *fw_filename;
const char *board;
struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
const void *quirk_data;
void *pdata;
const char *sof_fw_filename;
const char *sof_tplg_filename;
const char *asoc_plat_name;
struct platform_device * (*new_mach_data)(void *pdata);
};
#define SND_SOC_ACPI_MAX_CODECS 3
/**
* struct snd_soc_acpi_codecs: Structure to hold secondary codec information
* apart from the matched one, this data will be passed to the quirk function
* to match with the ACPI detected devices
*
* @num_codecs: number of secondary codecs used in the platform
* @codecs: holds the codec IDs
*
*/
struct snd_soc_acpi_codecs {
int num_codecs;
u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
};
/* check all codecs */
struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
#endif