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  * @dmic_num: number of SoC- or chipset-attached PDM digital microphones
64  * @common_hdmi_codec_drv: use commom HDAudio HDMI codec driver
65  * @link_mask: SoundWire links enabled on the board
66  * @links: array of SoundWire link _ADR descriptors, null terminated
67  * @i2s_link_mask: I2S/TDM links enabled on the board
68  * @num_dai_drivers: number of elements in @dai_drivers
69  * @dai_drivers: pointer to dai_drivers, used e.g. in nocodec mode
70  */
71 struct snd_soc_acpi_mach_params {
72 	u32 acpi_ipc_irq_index;
73 	const char *platform;
74 	u32 codec_mask;
75 	u32 dmic_num;
76 	bool common_hdmi_codec_drv;
77 	u32 link_mask;
78 	const struct snd_soc_acpi_link_adr *links;
79 	u32 i2s_link_mask;
80 	u32 num_dai_drivers;
81 	struct snd_soc_dai_driver *dai_drivers;
82 };
83 
84 /**
85  * snd_soc_acpi_endpoint - endpoint descriptor
86  * @num: endpoint number (mandatory, unique per device)
87  * @aggregated: 0 (independent) or 1 (logically grouped)
88  * @group_position: zero-based order (only when @aggregated is 1)
89  * @group_id: platform-unique group identifier (only when @aggregrated is 1)
90  */
91 struct snd_soc_acpi_endpoint {
92 	u8 num;
93 	u8 aggregated;
94 	u8 group_position;
95 	u8 group_id;
96 };
97 
98 /**
99  * snd_soc_acpi_adr_device - descriptor for _ADR-enumerated device
100  * @adr: 64 bit ACPI _ADR value
101  * @num_endpoints: number of endpoints for this device
102  * @endpoints: array of endpoints
103  * @name_prefix: string used for codec controls
104  */
105 struct snd_soc_acpi_adr_device {
106 	const u64 adr;
107 	const u8 num_endpoints;
108 	const struct snd_soc_acpi_endpoint *endpoints;
109 	const char *name_prefix;
110 };
111 
112 /**
113  * snd_soc_acpi_link_adr - ACPI-based list of _ADR enumerated devices
114  * @mask: one bit set indicates the link this list applies to
115  * @num_adr: ARRAY_SIZE of devices
116  * @adr_d: array of devices
117  *
118  * The number of devices per link can be more than 1, e.g. in SoundWire
119  * multi-drop configurations.
120  */
121 
122 struct snd_soc_acpi_link_adr {
123 	const u32 mask;
124 	const u32 num_adr;
125 	const struct snd_soc_acpi_adr_device *adr_d;
126 };
127 
128 /*
129  * when set the topology uses the -ssp<N> suffix, where N is determined based on
130  * BIOS or DMI information
131  */
132 #define SND_SOC_ACPI_TPLG_INTEL_SSP_NUMBER BIT(0)
133 
134 /*
135  * when more than one SSP is reported in the link mask, use the most significant.
136  * This choice was found to be valid on platforms with ES8336 codecs.
137  */
138 #define SND_SOC_ACPI_TPLG_INTEL_SSP_MSB BIT(1)
139 
140 /*
141  * when set the topology uses the -dmic<N>ch suffix, where N is determined based on
142  * BIOS or DMI information
143  */
144 #define SND_SOC_ACPI_TPLG_INTEL_DMIC_NUMBER BIT(2)
145 
146 /**
147  * snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
148  * related to the hardware, except for the firmware and topology file names.
149  * A platform supported by legacy and Sound Open Firmware (SOF) would expose
150  * all firmware/topology related fields.
151  *
152  * @id: ACPI ID (usually the codec's) used to find a matching machine driver.
153  * @comp_ids: list of compatible audio codecs using the same machine driver,
154  * firmware and topology
155  * @link_mask: describes required board layout, e.g. for SoundWire.
156  * @links: array of link _ADR descriptors, null terminated.
157  * @drv_name: machine driver name
158  * @fw_filename: firmware file name. Used when SOF is not enabled.
159  * @tplg_filename: topology file name. Used when SOF is not enabled.
160  * @board: board name
161  * @machine_quirk: pointer to quirk, usually based on DMI information when
162  * ACPI ID alone is not sufficient, wrong or misleading
163  * @quirk_data: data used to uniquely identify a machine, usually a list of
164  * audio codecs whose presence if checked with ACPI
165  * @pdata: intended for platform data or machine specific-ops. This structure
166  *  is not constant since this field may be updated at run-time
167  * @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
168  * @tplg_quirk_mask: quirks to select different topology files dynamically
169  */
170 /* Descriptor for SST ASoC machine driver */
171 struct snd_soc_acpi_mach {
172 	u8 id[ACPI_ID_LEN];
173 	const struct snd_soc_acpi_codecs *comp_ids;
174 	const u32 link_mask;
175 	const struct snd_soc_acpi_link_adr *links;
176 	const char *drv_name;
177 	const char *fw_filename;
178 	const char *tplg_filename;
179 	const char *board;
180 	struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
181 	const void *quirk_data;
182 	void *pdata;
183 	struct snd_soc_acpi_mach_params mach_params;
184 	const char *sof_tplg_filename;
185 	const u32 tplg_quirk_mask;
186 };
187 
188 #define SND_SOC_ACPI_MAX_CODECS 3
189 
190 /**
191  * struct snd_soc_acpi_codecs: Structure to hold secondary codec information
192  * apart from the matched one, this data will be passed to the quirk function
193  * to match with the ACPI detected devices
194  *
195  * @num_codecs: number of secondary codecs used in the platform
196  * @codecs: holds the codec IDs
197  *
198  */
199 struct snd_soc_acpi_codecs {
200 	int num_codecs;
201 	u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
202 };
203 
snd_soc_acpi_sof_parent(struct device * dev)204 static inline bool snd_soc_acpi_sof_parent(struct device *dev)
205 {
206 	return dev->parent && dev->parent->driver && dev->parent->driver->name &&
207 		!strncmp(dev->parent->driver->name, "sof-audio-acpi", strlen("sof-audio-acpi"));
208 }
209 
210 #endif
211