blob: 089b35f6f1086e0081262927acb84866fe845e0b [file] [log] [blame]
Takashi Iwai3256be62015-02-24 14:59:42 +01001/*
2 * sysfs support for HD-audio core device
3 */
4
5#include <linux/slab.h>
6#include <linux/sysfs.h>
7#include <linux/device.h>
8#include <sound/core.h>
9#include <sound/hdaudio.h>
10#include "local.h"
11
12struct hdac_widget_tree {
13 struct kobject *root;
14 struct kobject *afg;
15 struct kobject **nodes;
16};
17
18#define CODEC_ATTR(type) \
19static ssize_t type##_show(struct device *dev, \
20 struct device_attribute *attr, \
21 char *buf) \
22{ \
23 struct hdac_device *codec = dev_to_hdac_dev(dev); \
24 return sprintf(buf, "0x%x\n", codec->type); \
25} \
26static DEVICE_ATTR_RO(type)
27
28#define CODEC_ATTR_STR(type) \
29static ssize_t type##_show(struct device *dev, \
30 struct device_attribute *attr, \
31 char *buf) \
32{ \
33 struct hdac_device *codec = dev_to_hdac_dev(dev); \
34 return sprintf(buf, "%s\n", \
35 codec->type ? codec->type : ""); \
36} \
37static DEVICE_ATTR_RO(type)
38
Takashi Iwaieacf6e02015-04-13 10:43:54 +020039CODEC_ATTR(type);
Takashi Iwai3256be62015-02-24 14:59:42 +010040CODEC_ATTR(vendor_id);
41CODEC_ATTR(subsystem_id);
42CODEC_ATTR(revision_id);
43CODEC_ATTR(afg);
44CODEC_ATTR(mfg);
45CODEC_ATTR_STR(vendor_name);
46CODEC_ATTR_STR(chip_name);
47
48static struct attribute *hdac_dev_attrs[] = {
Takashi Iwaieacf6e02015-04-13 10:43:54 +020049 &dev_attr_type.attr,
Takashi Iwai3256be62015-02-24 14:59:42 +010050 &dev_attr_vendor_id.attr,
51 &dev_attr_subsystem_id.attr,
52 &dev_attr_revision_id.attr,
53 &dev_attr_afg.attr,
54 &dev_attr_mfg.attr,
55 &dev_attr_vendor_name.attr,
56 &dev_attr_chip_name.attr,
57 NULL
58};
59
60static struct attribute_group hdac_dev_attr_group = {
61 .attrs = hdac_dev_attrs,
62};
63
64const struct attribute_group *hdac_dev_attr_groups[] = {
65 &hdac_dev_attr_group,
66 NULL
67};
68
69/*
70 * Widget tree sysfs
71 *
72 * This is a tree showing the attributes of each widget. It appears like
73 * /sys/bus/hdaudioC0D0/widgets/04/caps
74 */
75
76struct widget_attribute;
77
78struct widget_attribute {
79 struct attribute attr;
80 ssize_t (*show)(struct hdac_device *codec, hda_nid_t nid,
81 struct widget_attribute *attr, char *buf);
82 ssize_t (*store)(struct hdac_device *codec, hda_nid_t nid,
83 struct widget_attribute *attr,
84 const char *buf, size_t count);
85};
86
87static int get_codec_nid(struct kobject *kobj, struct hdac_device **codecp)
88{
89 struct device *dev = kobj_to_dev(kobj->parent->parent);
90 int nid;
91 ssize_t ret;
92
93 ret = kstrtoint(kobj->name, 16, &nid);
94 if (ret < 0)
95 return ret;
96 *codecp = dev_to_hdac_dev(dev);
97 return nid;
98}
99
100static ssize_t widget_attr_show(struct kobject *kobj, struct attribute *attr,
101 char *buf)
102{
103 struct widget_attribute *wid_attr =
104 container_of(attr, struct widget_attribute, attr);
105 struct hdac_device *codec;
106 int nid;
107
108 if (!wid_attr->show)
109 return -EIO;
110 nid = get_codec_nid(kobj, &codec);
111 if (nid < 0)
112 return nid;
113 return wid_attr->show(codec, nid, wid_attr, buf);
114}
115
116static ssize_t widget_attr_store(struct kobject *kobj, struct attribute *attr,
117 const char *buf, size_t count)
118{
119 struct widget_attribute *wid_attr =
120 container_of(attr, struct widget_attribute, attr);
121 struct hdac_device *codec;
122 int nid;
123
124 if (!wid_attr->store)
125 return -EIO;
126 nid = get_codec_nid(kobj, &codec);
127 if (nid < 0)
128 return nid;
129 return wid_attr->store(codec, nid, wid_attr, buf, count);
130}
131
132static const struct sysfs_ops widget_sysfs_ops = {
133 .show = widget_attr_show,
134 .store = widget_attr_store,
135};
136
137static void widget_release(struct kobject *kobj)
138{
139 kfree(kobj);
140}
141
142static struct kobj_type widget_ktype = {
143 .release = widget_release,
144 .sysfs_ops = &widget_sysfs_ops,
145};
146
147#define WIDGET_ATTR_RO(_name) \
148 struct widget_attribute wid_attr_##_name = __ATTR_RO(_name)
149#define WIDGET_ATTR_RW(_name) \
150 struct widget_attribute wid_attr_##_name = __ATTR_RW(_name)
151
152static ssize_t caps_show(struct hdac_device *codec, hda_nid_t nid,
153 struct widget_attribute *attr, char *buf)
154{
155 return sprintf(buf, "0x%08x\n", get_wcaps(codec, nid));
156}
157
158static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid,
159 struct widget_attribute *attr, char *buf)
160{
161 if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
162 return 0;
163 return sprintf(buf, "0x%08x\n",
164 snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP));
165}
166
167static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid,
168 struct widget_attribute *attr, char *buf)
169{
170 unsigned int val;
171
172 if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
173 return 0;
174 if (snd_hdac_read(codec, nid, AC_VERB_GET_CONFIG_DEFAULT, 0, &val))
175 return 0;
176 return sprintf(buf, "0x%08x\n", val);
177}
178
179static bool has_pcm_cap(struct hdac_device *codec, hda_nid_t nid)
180{
181 if (nid == codec->afg || nid == codec->mfg)
182 return true;
183 switch (get_wcaps_type(get_wcaps(codec, nid))) {
184 case AC_WID_AUD_OUT:
185 case AC_WID_AUD_IN:
186 return true;
187 default:
188 return false;
189 }
190}
191
192static ssize_t pcm_caps_show(struct hdac_device *codec, hda_nid_t nid,
193 struct widget_attribute *attr, char *buf)
194{
195 if (!has_pcm_cap(codec, nid))
196 return 0;
197 return sprintf(buf, "0x%08x\n",
198 snd_hdac_read_parm(codec, nid, AC_PAR_PCM));
199}
200
201static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid,
202 struct widget_attribute *attr, char *buf)
203{
204 if (!has_pcm_cap(codec, nid))
205 return 0;
206 return sprintf(buf, "0x%08x\n",
207 snd_hdac_read_parm(codec, nid, AC_PAR_STREAM));
208}
209
210static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid,
211 struct widget_attribute *attr, char *buf)
212{
213 if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP))
214 return 0;
215 return sprintf(buf, "0x%08x\n",
216 snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP));
217}
218
219static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid,
220 struct widget_attribute *attr, char *buf)
221{
222 if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP))
223 return 0;
224 return sprintf(buf, "0x%08x\n",
225 snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP));
226}
227
228static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid,
229 struct widget_attribute *attr, char *buf)
230{
231 if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER))
232 return 0;
233 return sprintf(buf, "0x%08x\n",
234 snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE));
235}
236
237static ssize_t gpio_caps_show(struct hdac_device *codec, hda_nid_t nid,
238 struct widget_attribute *attr, char *buf)
239{
240 return sprintf(buf, "0x%08x\n",
241 snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP));
242}
243
244static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid,
245 struct widget_attribute *attr, char *buf)
246{
247 hda_nid_t list[32];
248 int i, nconns;
249 ssize_t ret = 0;
250
251 nconns = snd_hdac_get_connections(codec, nid, list, ARRAY_SIZE(list));
252 if (nconns <= 0)
253 return nconns;
254 for (i = 0; i < nconns; i++)
255 ret += sprintf(buf + ret, "%s0x%02x", i ? " " : "", list[i]);
256 ret += sprintf(buf + ret, "\n");
257 return ret;
258}
259
260static WIDGET_ATTR_RO(caps);
261static WIDGET_ATTR_RO(pin_caps);
262static WIDGET_ATTR_RO(pin_cfg);
263static WIDGET_ATTR_RO(pcm_caps);
264static WIDGET_ATTR_RO(pcm_formats);
265static WIDGET_ATTR_RO(amp_in_caps);
266static WIDGET_ATTR_RO(amp_out_caps);
267static WIDGET_ATTR_RO(power_caps);
268static WIDGET_ATTR_RO(gpio_caps);
269static WIDGET_ATTR_RO(connections);
270
271static struct attribute *widget_node_attrs[] = {
272 &wid_attr_caps.attr,
273 &wid_attr_pin_caps.attr,
274 &wid_attr_pin_cfg.attr,
275 &wid_attr_pcm_caps.attr,
276 &wid_attr_pcm_formats.attr,
277 &wid_attr_amp_in_caps.attr,
278 &wid_attr_amp_out_caps.attr,
279 &wid_attr_power_caps.attr,
280 &wid_attr_connections.attr,
281 NULL,
282};
283
284static struct attribute *widget_afg_attrs[] = {
285 &wid_attr_pcm_caps.attr,
286 &wid_attr_pcm_formats.attr,
287 &wid_attr_amp_in_caps.attr,
288 &wid_attr_amp_out_caps.attr,
289 &wid_attr_power_caps.attr,
290 &wid_attr_gpio_caps.attr,
291 NULL,
292};
293
294static const struct attribute_group widget_node_group = {
295 .attrs = widget_node_attrs,
296};
297
298static const struct attribute_group widget_afg_group = {
299 .attrs = widget_afg_attrs,
300};
301
302static void free_widget_node(struct kobject *kobj,
303 const struct attribute_group *group)
304{
305 if (kobj) {
306 sysfs_remove_group(kobj, group);
307 kobject_put(kobj);
308 }
309}
310
311static void widget_tree_free(struct hdac_device *codec)
312{
313 struct hdac_widget_tree *tree = codec->widgets;
314 struct kobject **p;
315
316 if (!tree)
317 return;
Takashi Iwai142267c9e2015-04-08 11:41:59 +0200318 free_widget_node(tree->afg, &widget_afg_group);
Takashi Iwai3256be62015-02-24 14:59:42 +0100319 if (tree->nodes) {
320 for (p = tree->nodes; *p; p++)
321 free_widget_node(*p, &widget_node_group);
322 kfree(tree->nodes);
323 }
Markus Elfring24d9b752015-07-08 21:26:02 +0200324 kobject_put(tree->root);
Takashi Iwai3256be62015-02-24 14:59:42 +0100325 kfree(tree);
326 codec->widgets = NULL;
327}
328
329static int add_widget_node(struct kobject *parent, hda_nid_t nid,
330 const struct attribute_group *group,
331 struct kobject **res)
332{
333 struct kobject *kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
334 int err;
335
336 if (!kobj)
337 return -ENOMEM;
338 kobject_init(kobj, &widget_ktype);
339 err = kobject_add(kobj, parent, "%02x", nid);
340 if (err < 0)
341 return err;
342 err = sysfs_create_group(kobj, group);
343 if (err < 0) {
344 kobject_put(kobj);
345 return err;
346 }
347
348 *res = kobj;
349 return 0;
350}
351
352static int widget_tree_create(struct hdac_device *codec)
353{
354 struct hdac_widget_tree *tree;
355 int i, err;
356 hda_nid_t nid;
357
358 tree = codec->widgets = kzalloc(sizeof(*tree), GFP_KERNEL);
359 if (!tree)
360 return -ENOMEM;
361
362 tree->root = kobject_create_and_add("widgets", &codec->dev.kobj);
363 if (!tree->root)
364 return -ENOMEM;
365
Takashi Iwai3256be62015-02-24 14:59:42 +0100366 tree->nodes = kcalloc(codec->num_nodes + 1, sizeof(*tree->nodes),
367 GFP_KERNEL);
368 if (!tree->nodes)
369 return -ENOMEM;
370
371 for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) {
372 err = add_widget_node(tree->root, nid, &widget_node_group,
373 &tree->nodes[i]);
374 if (err < 0)
375 return err;
376 }
377
Takashi Iwai142267c9e2015-04-08 11:41:59 +0200378 if (codec->afg) {
379 err = add_widget_node(tree->root, codec->afg,
380 &widget_afg_group, &tree->afg);
381 if (err < 0)
382 return err;
383 }
384
Takashi Iwai3256be62015-02-24 14:59:42 +0100385 kobject_uevent(tree->root, KOBJ_CHANGE);
386 return 0;
387}
388
389int hda_widget_sysfs_init(struct hdac_device *codec)
390{
391 int err;
392
393 err = widget_tree_create(codec);
394 if (err < 0) {
395 widget_tree_free(codec);
396 return err;
397 }
398
399 return 0;
400}
401
402void hda_widget_sysfs_exit(struct hdac_device *codec)
403{
404 widget_tree_free(codec);
405}