d9c8f5cb389e33289c9c57b6e330725e8f75568c
[sfrench/cifs-2.6.git] / sound / soc / intel / skylake / skl-nhlt.c
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
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
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
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
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
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
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
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
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
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  */
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
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
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 }