1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * skl-nhlt.c - Intel SKL Platform NHLT parsing
4 *
5 * Copyright (C) 2015 Intel Corp
6 * Author: Sanjiv Kumar <sanjiv.kumar@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 */
11 #include <linux/pci.h>
12 #include <sound/intel-nhlt.h>
13 #include "skl.h"
14 #include "skl-i2s.h"
15
skl_get_specific_cfg(struct device * dev,struct nhlt_fmt * fmt,u8 no_ch,u32 rate,u16 bps,u8 linktype)16 static struct nhlt_specific_cfg *skl_get_specific_cfg(
17 struct device *dev, struct nhlt_fmt *fmt,
18 u8 no_ch, u32 rate, u16 bps, u8 linktype)
19 {
20 struct nhlt_specific_cfg *sp_config;
21 struct wav_fmt *wfmt;
22 struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
23 int i;
24
25 dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
26
27 for (i = 0; i < fmt->fmt_count; i++) {
28 wfmt = &fmt_config->fmt_ext.fmt;
29 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
30 wfmt->bits_per_sample, wfmt->samples_per_sec);
31 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
32 /*
33 * if link type is dmic ignore rate check as the blob is
34 * generic for all rates
35 */
36 sp_config = &fmt_config->config;
37 if (linktype == NHLT_LINK_DMIC)
38 return sp_config;
39
40 if (wfmt->samples_per_sec == rate)
41 return sp_config;
42 }
43
44 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
45 fmt_config->config.size);
46 }
47
48 return NULL;
49 }
50
dump_config(struct device * dev,u32 instance_id,u8 linktype,u8 s_fmt,u8 num_channels,u32 s_rate,u8 dirn,u16 bps)51 static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
52 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
53 {
54 dev_dbg(dev, "Input configuration\n");
55 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
56 dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
57 dev_dbg(dev, "bits_per_sample=%d\n", bps);
58 }
59
skl_check_ep_match(struct device * dev,struct nhlt_endpoint * epnt,u32 instance_id,u8 link_type,u8 dirn,u8 dev_type)60 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
61 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
62 {
63 dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
64 epnt->virtual_bus_id, epnt->linktype,
65 epnt->direction, epnt->device_type);
66
67 if ((epnt->virtual_bus_id == instance_id) &&
68 (epnt->linktype == link_type) &&
69 (epnt->direction == dirn)) {
70 /* do not check dev_type for DMIC link type */
71 if (epnt->linktype == NHLT_LINK_DMIC)
72 return true;
73
74 if (epnt->device_type == dev_type)
75 return true;
76 }
77
78 return false;
79 }
80
81 struct nhlt_specific_cfg
skl_get_ep_blob(struct skl_dev * skl,u32 instance,u8 link_type,u8 s_fmt,u8 num_ch,u32 s_rate,u8 dirn,u8 dev_type)82 *skl_get_ep_blob(struct skl_dev *skl, u32 instance, u8 link_type,
83 u8 s_fmt, u8 num_ch, u32 s_rate,
84 u8 dirn, u8 dev_type)
85 {
86 struct nhlt_fmt *fmt;
87 struct nhlt_endpoint *epnt;
88 struct hdac_bus *bus = skl_to_bus(skl);
89 struct device *dev = bus->dev;
90 struct nhlt_specific_cfg *sp_config;
91 struct nhlt_acpi_table *nhlt = skl->nhlt;
92 u16 bps = (s_fmt == 16) ? 16 : 32;
93 u8 j;
94
95 dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
96
97 epnt = (struct nhlt_endpoint *)nhlt->desc;
98
99 dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
100
101 for (j = 0; j < nhlt->endpoint_count; j++) {
102 if (skl_check_ep_match(dev, epnt, instance, link_type,
103 dirn, dev_type)) {
104 fmt = (struct nhlt_fmt *)(epnt->config.caps +
105 epnt->config.size);
106 sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
107 s_rate, bps, link_type);
108 if (sp_config)
109 return sp_config;
110 }
111
112 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
113 }
114
115 return NULL;
116 }
117
skl_nhlt_trim_space(char * trim)118 static void skl_nhlt_trim_space(char *trim)
119 {
120 char *s = trim;
121 int cnt;
122 int i;
123
124 cnt = 0;
125 for (i = 0; s[i]; i++) {
126 if (!isspace(s[i]))
127 s[cnt++] = s[i];
128 }
129
130 s[cnt] = '\0';
131 }
132
skl_nhlt_update_topology_bin(struct skl_dev * skl)133 int skl_nhlt_update_topology_bin(struct skl_dev *skl)
134 {
135 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
136 struct hdac_bus *bus = skl_to_bus(skl);
137 struct device *dev = bus->dev;
138
139 dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n",
140 nhlt->header.oem_id, nhlt->header.oem_table_id,
141 nhlt->header.oem_revision);
142
143 snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
144 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
145 nhlt->header.oem_revision, "-tplg.bin");
146
147 skl_nhlt_trim_space(skl->tplg_name);
148
149 return 0;
150 }
151
skl_nhlt_platform_id_show(struct device * dev,struct device_attribute * attr,char * buf)152 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
154 {
155 struct pci_dev *pci = to_pci_dev(dev);
156 struct hdac_bus *bus = pci_get_drvdata(pci);
157 struct skl_dev *skl = bus_to_skl(bus);
158 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
159 char platform_id[32];
160
161 sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
162 nhlt->header.oem_id, nhlt->header.oem_table_id,
163 nhlt->header.oem_revision);
164
165 skl_nhlt_trim_space(platform_id);
166 return sprintf(buf, "%s\n", platform_id);
167 }
168
169 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
170
skl_nhlt_create_sysfs(struct skl_dev * skl)171 int skl_nhlt_create_sysfs(struct skl_dev *skl)
172 {
173 struct device *dev = &skl->pci->dev;
174
175 if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
176 dev_warn(dev, "Error creating sysfs entry\n");
177
178 return 0;
179 }
180
skl_nhlt_remove_sysfs(struct skl_dev * skl)181 void skl_nhlt_remove_sysfs(struct skl_dev *skl)
182 {
183 struct device *dev = &skl->pci->dev;
184
185 if (skl->nhlt)
186 sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
187 }
188
189 /*
190 * Queries NHLT for all the fmt configuration for a particular endpoint and
191 * stores all possible rates supported in a rate table for the corresponding
192 * sclk/sclkfs.
193 */
skl_get_ssp_clks(struct skl_dev * skl,struct skl_ssp_clk * ssp_clks,struct nhlt_fmt * fmt,u8 id)194 static void skl_get_ssp_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks,
195 struct nhlt_fmt *fmt, u8 id)
196 {
197 struct skl_i2s_config_blob_ext *i2s_config_ext;
198 struct skl_i2s_config_blob_legacy *i2s_config;
199 struct skl_clk_parent_src *parent;
200 struct skl_ssp_clk *sclk, *sclkfs;
201 struct nhlt_fmt_cfg *fmt_cfg;
202 struct wav_fmt_ext *wav_fmt;
203 unsigned long rate = 0;
204 bool present = false;
205 int rate_index = 0;
206 u16 channels, bps;
207 u8 clk_src;
208 int i, j;
209 u32 fs;
210
211 sclk = &ssp_clks[SKL_SCLK_OFS];
212 sclkfs = &ssp_clks[SKL_SCLKFS_OFS];
213
214 if (fmt->fmt_count == 0)
215 return;
216
217 for (i = 0; i < fmt->fmt_count; i++) {
218 fmt_cfg = &fmt->fmt_config[i];
219 wav_fmt = &fmt_cfg->fmt_ext;
220
221 channels = wav_fmt->fmt.channels;
222 bps = wav_fmt->fmt.bits_per_sample;
223 fs = wav_fmt->fmt.samples_per_sec;
224
225 /*
226 * In case of TDM configuration on a ssp, there can
227 * be more than one blob in which channel masks are
228 * different for each usecase for a specific rate and bps.
229 * But the sclk rate will be generated for the total
230 * number of channels used for that endpoint.
231 *
232 * So for the given fs and bps, choose blob which has
233 * the superset of all channels for that endpoint and
234 * derive the rate.
235 */
236 for (j = i; j < fmt->fmt_count; j++) {
237 fmt_cfg = &fmt->fmt_config[j];
238 wav_fmt = &fmt_cfg->fmt_ext;
239 if ((fs == wav_fmt->fmt.samples_per_sec) &&
240 (bps == wav_fmt->fmt.bits_per_sample))
241 channels = max_t(u16, channels,
242 wav_fmt->fmt.channels);
243 }
244
245 rate = channels * bps * fs;
246
247 /* check if the rate is added already to the given SSP's sclk */
248 for (j = 0; (j < SKL_MAX_CLK_RATES) &&
249 (sclk[id].rate_cfg[j].rate != 0); j++) {
250 if (sclk[id].rate_cfg[j].rate == rate) {
251 present = true;
252 break;
253 }
254 }
255
256 /* Fill rate and parent for sclk/sclkfs */
257 if (!present) {
258 i2s_config_ext = (struct skl_i2s_config_blob_ext *)
259 fmt->fmt_config[0].config.caps;
260
261 /* MCLK Divider Source Select */
262 if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
263 i2s_config = ext_to_legacy_blob(i2s_config_ext);
264 clk_src = get_clk_src(i2s_config->mclk,
265 SKL_MNDSS_DIV_CLK_SRC_MASK);
266 } else {
267 clk_src = get_clk_src(i2s_config_ext->mclk,
268 SKL_MNDSS_DIV_CLK_SRC_MASK);
269 }
270
271 parent = skl_get_parent_clk(clk_src);
272
273 /*
274 * Do not copy the config data if there is no parent
275 * clock available for this clock source select
276 */
277 if (!parent)
278 continue;
279
280 sclk[id].rate_cfg[rate_index].rate = rate;
281 sclk[id].rate_cfg[rate_index].config = fmt_cfg;
282 sclkfs[id].rate_cfg[rate_index].rate = rate;
283 sclkfs[id].rate_cfg[rate_index].config = fmt_cfg;
284 sclk[id].parent_name = parent->name;
285 sclkfs[id].parent_name = parent->name;
286
287 rate_index++;
288 }
289 }
290 }
291
skl_get_mclk(struct skl_dev * skl,struct skl_ssp_clk * mclk,struct nhlt_fmt * fmt,u8 id)292 static void skl_get_mclk(struct skl_dev *skl, struct skl_ssp_clk *mclk,
293 struct nhlt_fmt *fmt, u8 id)
294 {
295 struct skl_i2s_config_blob_ext *i2s_config_ext;
296 struct skl_i2s_config_blob_legacy *i2s_config;
297 struct nhlt_specific_cfg *fmt_cfg;
298 struct skl_clk_parent_src *parent;
299 u32 clkdiv, div_ratio;
300 u8 clk_src;
301
302 fmt_cfg = &fmt->fmt_config[0].config;
303 i2s_config_ext = (struct skl_i2s_config_blob_ext *)fmt_cfg->caps;
304
305 /* MCLK Divider Source Select and divider */
306 if (is_legacy_blob(i2s_config_ext->hdr.sig)) {
307 i2s_config = ext_to_legacy_blob(i2s_config_ext);
308 clk_src = get_clk_src(i2s_config->mclk,
309 SKL_MCLK_DIV_CLK_SRC_MASK);
310 clkdiv = i2s_config->mclk.mdivr &
311 SKL_MCLK_DIV_RATIO_MASK;
312 } else {
313 clk_src = get_clk_src(i2s_config_ext->mclk,
314 SKL_MCLK_DIV_CLK_SRC_MASK);
315 clkdiv = i2s_config_ext->mclk.mdivr[0] &
316 SKL_MCLK_DIV_RATIO_MASK;
317 }
318
319 /* bypass divider */
320 div_ratio = 1;
321
322 if (clkdiv != SKL_MCLK_DIV_RATIO_MASK)
323 /* Divider is 2 + clkdiv */
324 div_ratio = clkdiv + 2;
325
326 /* Calculate MCLK rate from source using div value */
327 parent = skl_get_parent_clk(clk_src);
328 if (!parent)
329 return;
330
331 mclk[id].rate_cfg[0].rate = parent->rate/div_ratio;
332 mclk[id].rate_cfg[0].config = &fmt->fmt_config[0];
333 mclk[id].parent_name = parent->name;
334 }
335
skl_get_clks(struct skl_dev * skl,struct skl_ssp_clk * ssp_clks)336 void skl_get_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks)
337 {
338 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
339 struct nhlt_endpoint *epnt;
340 struct nhlt_fmt *fmt;
341 int i;
342 u8 id;
343
344 epnt = (struct nhlt_endpoint *)nhlt->desc;
345 for (i = 0; i < nhlt->endpoint_count; i++) {
346 if (epnt->linktype == NHLT_LINK_SSP) {
347 id = epnt->virtual_bus_id;
348
349 fmt = (struct nhlt_fmt *)(epnt->config.caps
350 + epnt->config.size);
351
352 skl_get_ssp_clks(skl, ssp_clks, fmt, id);
353 skl_get_mclk(skl, ssp_clks, fmt, id);
354 }
355 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
356 }
357 }
358