1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2015-2019 Intel Corporation
3
4 #include <linux/acpi.h>
5 #include <sound/intel-nhlt.h>
6
intel_nhlt_init(struct device * dev)7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
8 {
9 struct nhlt_acpi_table *nhlt;
10 acpi_status status;
11
12 status = acpi_get_table(ACPI_SIG_NHLT, 0,
13 (struct acpi_table_header **)&nhlt);
14 if (ACPI_FAILURE(status)) {
15 dev_warn(dev, "NHLT table not found\n");
16 return NULL;
17 }
18
19 return nhlt;
20 }
21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
22
intel_nhlt_free(struct nhlt_acpi_table * nhlt)23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
24 {
25 acpi_put_table((struct acpi_table_header *)nhlt);
26 }
27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
28
intel_nhlt_get_dmic_geo(struct device * dev,struct nhlt_acpi_table * nhlt)29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
30 {
31 struct nhlt_endpoint *epnt;
32 struct nhlt_dmic_array_config *cfg;
33 struct nhlt_vendor_dmic_array_config *cfg_vendor;
34 struct nhlt_fmt *fmt_configs;
35 unsigned int dmic_geo = 0;
36 u16 max_ch = 0;
37 u8 i, j;
38
39 if (!nhlt)
40 return 0;
41
42 if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
43 dev_warn(dev, "Invalid DMIC description table\n");
44 return 0;
45 }
46
47 for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
48 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
49
50 if (epnt->linktype != NHLT_LINK_DMIC)
51 continue;
52
53 cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
54 fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
55
56 /* find max number of channels based on format_configuration */
57 if (fmt_configs->fmt_count) {
58 struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
59
60 dev_dbg(dev, "found %d format definitions\n",
61 fmt_configs->fmt_count);
62
63 for (i = 0; i < fmt_configs->fmt_count; i++) {
64 struct wav_fmt_ext *fmt_ext;
65
66 fmt_ext = &fmt_cfg->fmt_ext;
67
68 if (fmt_ext->fmt.channels > max_ch)
69 max_ch = fmt_ext->fmt.channels;
70
71 /* Move to the next nhlt_fmt_cfg */
72 fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
73 fmt_cfg->config.size);
74 }
75 dev_dbg(dev, "max channels found %d\n", max_ch);
76 } else {
77 dev_dbg(dev, "No format information found\n");
78 }
79
80 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
81 dmic_geo = max_ch;
82 } else {
83 switch (cfg->array_type) {
84 case NHLT_MIC_ARRAY_2CH_SMALL:
85 case NHLT_MIC_ARRAY_2CH_BIG:
86 dmic_geo = MIC_ARRAY_2CH;
87 break;
88
89 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
90 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
91 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
92 dmic_geo = MIC_ARRAY_4CH;
93 break;
94 case NHLT_MIC_ARRAY_VENDOR_DEFINED:
95 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
96 dmic_geo = cfg_vendor->nb_mics;
97 break;
98 default:
99 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
100 __func__, cfg->array_type);
101 }
102
103 if (dmic_geo > 0) {
104 dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
105 }
106 if (max_ch > dmic_geo) {
107 dev_dbg(dev, "max channels %d exceed dmic number %d\n",
108 max_ch, dmic_geo);
109 }
110 }
111 }
112
113 dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
114
115 return dmic_geo;
116 }
117 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
118
intel_nhlt_has_endpoint_type(struct nhlt_acpi_table * nhlt,u8 link_type)119 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
120 {
121 struct nhlt_endpoint *epnt;
122 int i;
123
124 if (!nhlt)
125 return false;
126
127 epnt = (struct nhlt_endpoint *)nhlt->desc;
128 for (i = 0; i < nhlt->endpoint_count; i++) {
129 if (epnt->linktype == link_type)
130 return true;
131
132 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
133 }
134 return false;
135 }
136 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
137
intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table * nhlt,u8 device_type)138 int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
139 {
140 struct nhlt_endpoint *epnt;
141 int ssp_mask = 0;
142 int i;
143
144 if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
145 return 0;
146
147 epnt = (struct nhlt_endpoint *)nhlt->desc;
148 for (i = 0; i < nhlt->endpoint_count; i++) {
149 if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
150 /* for SSP the virtual bus id is the SSP port */
151 ssp_mask |= BIT(epnt->virtual_bus_id);
152 }
153 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
154 }
155
156 return ssp_mask;
157 }
158 EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);
159
160 #define SSP_BLOB_V1_0_SIZE 84
161 #define SSP_BLOB_V1_0_MDIVC_OFFSET 19 /* offset in u32 */
162
163 #define SSP_BLOB_V1_5_SIZE 96
164 #define SSP_BLOB_V1_5_MDIVC_OFFSET 21 /* offset in u32 */
165 #define SSP_BLOB_VER_1_5 0xEE000105
166
167 #define SSP_BLOB_V2_0_SIZE 88
168 #define SSP_BLOB_V2_0_MDIVC_OFFSET 20 /* offset in u32 */
169 #define SSP_BLOB_VER_2_0 0xEE000200
170
intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table * nhlt,int ssp_num)171 int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num)
172 {
173 struct nhlt_endpoint *epnt;
174 struct nhlt_fmt *fmt;
175 struct nhlt_fmt_cfg *cfg;
176 int mclk_mask = 0;
177 int i, j;
178
179 if (!nhlt)
180 return 0;
181
182 epnt = (struct nhlt_endpoint *)nhlt->desc;
183 for (i = 0; i < nhlt->endpoint_count; i++) {
184
185 /* we only care about endpoints connected to an audio codec over SSP */
186 if (epnt->linktype == NHLT_LINK_SSP &&
187 epnt->device_type == NHLT_DEVICE_I2S &&
188 epnt->virtual_bus_id == ssp_num) {
189
190 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
191 cfg = fmt->fmt_config;
192
193 /*
194 * In theory all formats should use the same MCLK but it doesn't hurt to
195 * double-check that the configuration is consistent
196 */
197 for (j = 0; j < fmt->fmt_count; j++) {
198 u32 *blob;
199 int mdivc_offset;
200 int size;
201
202 /* first check we have enough data to read the blob type */
203 if (cfg->config.size < 8)
204 return -EINVAL;
205
206 blob = (u32 *)cfg->config.caps;
207
208 if (blob[1] == SSP_BLOB_VER_2_0) {
209 mdivc_offset = SSP_BLOB_V2_0_MDIVC_OFFSET;
210 size = SSP_BLOB_V2_0_SIZE;
211 } else if (blob[1] == SSP_BLOB_VER_1_5) {
212 mdivc_offset = SSP_BLOB_V1_5_MDIVC_OFFSET;
213 size = SSP_BLOB_V1_5_SIZE;
214 } else {
215 mdivc_offset = SSP_BLOB_V1_0_MDIVC_OFFSET;
216 size = SSP_BLOB_V1_0_SIZE;
217 }
218
219 /* make sure we have enough data for the fixed part of the blob */
220 if (cfg->config.size < size)
221 return -EINVAL;
222
223 mclk_mask |= blob[mdivc_offset] & GENMASK(1, 0);
224
225 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
226 }
227 }
228 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
229 }
230
231 /* make sure only one MCLK is used */
232 if (hweight_long(mclk_mask) != 1)
233 return -EINVAL;
234
235 return mclk_mask;
236 }
237 EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask);
238
239 static struct nhlt_specific_cfg *
nhlt_get_specific_cfg(struct device * dev,struct nhlt_fmt * fmt,u8 num_ch,u32 rate,u8 vbps,u8 bps)240 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
241 u32 rate, u8 vbps, u8 bps)
242 {
243 struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
244 struct wav_fmt *wfmt;
245 u16 _bps, _vbps;
246 int i;
247
248 dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
249
250 for (i = 0; i < fmt->fmt_count; i++) {
251 wfmt = &cfg->fmt_ext.fmt;
252 _bps = wfmt->bits_per_sample;
253 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
254
255 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
256 wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
257
258 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
259 vbps == _vbps && bps == _bps)
260 return &cfg->config;
261
262 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
263 }
264
265 return NULL;
266 }
267
nhlt_check_ep_match(struct device * dev,struct nhlt_endpoint * epnt,u32 bus_id,u8 link_type,u8 dir,u8 dev_type)268 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
269 u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
270 {
271 dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
272 epnt->virtual_bus_id, epnt->linktype,
273 epnt->direction, epnt->device_type);
274
275 if ((epnt->virtual_bus_id != bus_id) ||
276 (epnt->linktype != link_type) ||
277 (epnt->direction != dir))
278 return false;
279
280 /* link of type DMIC bypasses device_type check */
281 return epnt->linktype == NHLT_LINK_DMIC ||
282 epnt->device_type == dev_type;
283 }
284
285 struct nhlt_specific_cfg *
intel_nhlt_get_endpoint_blob(struct device * dev,struct nhlt_acpi_table * nhlt,u32 bus_id,u8 link_type,u8 vbps,u8 bps,u8 num_ch,u32 rate,u8 dir,u8 dev_type)286 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
287 u32 bus_id, u8 link_type, u8 vbps, u8 bps,
288 u8 num_ch, u32 rate, u8 dir, u8 dev_type)
289 {
290 struct nhlt_specific_cfg *cfg;
291 struct nhlt_endpoint *epnt;
292 struct nhlt_fmt *fmt;
293 int i;
294
295 if (!nhlt)
296 return NULL;
297
298 dev_dbg(dev, "Looking for configuration:\n");
299 dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
300 bus_id, link_type, dir, dev_type);
301 dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
302 dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
303
304 epnt = (struct nhlt_endpoint *)nhlt->desc;
305
306 for (i = 0; i < nhlt->endpoint_count; i++) {
307 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
308 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
309
310 cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps);
311 if (cfg)
312 return cfg;
313 }
314
315 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
316 }
317
318 return NULL;
319 }
320 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);
321