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 *
snd_soc_acpi_find_machine(struct snd_soc_acpi_mach * machines)38 snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
39 {
40 return NULL;
41 }
42
43 static inline bool
snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],struct snd_soc_acpi_package_context * ctx)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 */
snd_soc_acpi_codec_list(void * arg)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 * @num_dai_drivers: number of elements in @dai_drivers
67 * @dai_drivers: pointer to dai_drivers, used e.g. in nocodec mode
68 */
69 struct snd_soc_acpi_mach_params {
70 u32 acpi_ipc_irq_index;
71 const char *platform;
72 u32 codec_mask;
73 u32 dmic_num;
74 bool common_hdmi_codec_drv;
75 u32 link_mask;
76 const struct snd_soc_acpi_link_adr *links;
77 u32 num_dai_drivers;
78 struct snd_soc_dai_driver *dai_drivers;
79 };
80
81 /**
82 * snd_soc_acpi_endpoint - endpoint descriptor
83 * @num: endpoint number (mandatory, unique per device)
84 * @aggregated: 0 (independent) or 1 (logically grouped)
85 * @group_position: zero-based order (only when @aggregated is 1)
86 * @group_id: platform-unique group identifier (only when @aggregrated is 1)
87 */
88 struct snd_soc_acpi_endpoint {
89 u8 num;
90 u8 aggregated;
91 u8 group_position;
92 u8 group_id;
93 };
94
95 /**
96 * snd_soc_acpi_adr_device - descriptor for _ADR-enumerated device
97 * @adr: 64 bit ACPI _ADR value
98 * @num_endpoints: number of endpoints for this device
99 * @endpoints: array of endpoints
100 * @name_prefix: string used for codec controls
101 */
102 struct snd_soc_acpi_adr_device {
103 const u64 adr;
104 const u8 num_endpoints;
105 const struct snd_soc_acpi_endpoint *endpoints;
106 const char *name_prefix;
107 };
108
109 /**
110 * snd_soc_acpi_link_adr - ACPI-based list of _ADR enumerated devices
111 * @mask: one bit set indicates the link this list applies to
112 * @num_adr: ARRAY_SIZE of devices
113 * @adr_d: array of devices
114 *
115 * The number of devices per link can be more than 1, e.g. in SoundWire
116 * multi-drop configurations.
117 */
118
119 struct snd_soc_acpi_link_adr {
120 const u32 mask;
121 const u32 num_adr;
122 const struct snd_soc_acpi_adr_device *adr_d;
123 };
124
125 /**
126 * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
127 * related to the hardware, except for the firmware and topology file names.
128 * A platform supported by legacy and Sound Open Firmware (SOF) would expose
129 * all firmware/topology related fields.
130 *
131 * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
132 * @comp_ids: list of compatible audio codecs using the same machine driver,
133 * firmware and topology
134 * @link_mask: describes required board layout, e.g. for SoundWire.
135 * @links: array of link _ADR descriptors, null terminated.
136 * @drv_name: machine driver name
137 * @fw_filename: firmware file name. Used when SOF is not enabled.
138 * @board: board name
139 * @machine_quirk: pointer to quirk, usually based on DMI information when
140 * ACPI ID alone is not sufficient, wrong or misleading
141 * @quirk_data: data used to uniquely identify a machine, usually a list of
142 * audio codecs whose presence if checked with ACPI
143 * @pdata: intended for platform data or machine specific-ops. This structure
144 * is not constant since this field may be updated at run-time
145 * @sof_fw_filename: Sound Open Firmware file name, if enabled
146 * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
147 */
148 /* Descriptor for SST ASoC machine driver */
149 struct snd_soc_acpi_mach {
150 u8 id[ACPI_ID_LEN];
151 const struct snd_soc_acpi_codecs *comp_ids;
152 const u32 link_mask;
153 const struct snd_soc_acpi_link_adr *links;
154 const char *drv_name;
155 const char *fw_filename;
156 const char *board;
157 struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
158 const void *quirk_data;
159 void *pdata;
160 struct snd_soc_acpi_mach_params mach_params;
161 const char *sof_fw_filename;
162 const char *sof_tplg_filename;
163 };
164
165 #define SND_SOC_ACPI_MAX_CODECS 3
166
167 /**
168 * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
169 * apart from the matched one, this data will be passed to the quirk function
170 * to match with the ACPI detected devices
171 *
172 * @num_codecs: number of secondary codecs used in the platform
173 * @codecs: holds the codec IDs
174 *
175 */
176 struct snd_soc_acpi_codecs {
177 int num_codecs;
178 u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
179 };
180
snd_soc_acpi_sof_parent(struct device * dev)181 static inline bool snd_soc_acpi_sof_parent(struct device *dev)
182 {
183 return dev->parent && dev->parent->driver && dev->parent->driver->name &&
184 !strncmp(dev->parent->driver->name, "sof-audio-acpi", strlen("sof-audio-acpi"));
185 }
186
187 #endif
188