Commit | Line | Data |
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3256be65 TI |
1 | /* |
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 | ||
12 | struct hdac_widget_tree { | |
13 | struct kobject *root; | |
14 | struct kobject *afg; | |
15 | struct kobject **nodes; | |
16 | }; | |
17 | ||
18 | #define CODEC_ATTR(type) \ | |
19 | static 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 | } \ | |
26 | static DEVICE_ATTR_RO(type) | |
27 | ||
28 | #define CODEC_ATTR_STR(type) \ | |
29 | static 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 | } \ | |
37 | static DEVICE_ATTR_RO(type) | |
38 | ||
eacf6e0a | 39 | CODEC_ATTR(type); |
3256be65 TI |
40 | CODEC_ATTR(vendor_id); |
41 | CODEC_ATTR(subsystem_id); | |
42 | CODEC_ATTR(revision_id); | |
43 | CODEC_ATTR(afg); | |
44 | CODEC_ATTR(mfg); | |
45 | CODEC_ATTR_STR(vendor_name); | |
46 | CODEC_ATTR_STR(chip_name); | |
47 | ||
78abb2af SP |
48 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
49 | char *buf) | |
50 | { | |
51 | return snd_hdac_codec_modalias(dev_to_hdac_dev(dev), buf, 256); | |
52 | } | |
53 | static DEVICE_ATTR_RO(modalias); | |
54 | ||
3256be65 | 55 | static struct attribute *hdac_dev_attrs[] = { |
eacf6e0a | 56 | &dev_attr_type.attr, |
3256be65 TI |
57 | &dev_attr_vendor_id.attr, |
58 | &dev_attr_subsystem_id.attr, | |
59 | &dev_attr_revision_id.attr, | |
60 | &dev_attr_afg.attr, | |
61 | &dev_attr_mfg.attr, | |
62 | &dev_attr_vendor_name.attr, | |
63 | &dev_attr_chip_name.attr, | |
78abb2af | 64 | &dev_attr_modalias.attr, |
3256be65 TI |
65 | NULL |
66 | }; | |
67 | ||
68 | static struct attribute_group hdac_dev_attr_group = { | |
69 | .attrs = hdac_dev_attrs, | |
70 | }; | |
71 | ||
72 | const struct attribute_group *hdac_dev_attr_groups[] = { | |
73 | &hdac_dev_attr_group, | |
74 | NULL | |
75 | }; | |
76 | ||
77 | /* | |
78 | * Widget tree sysfs | |
79 | * | |
80 | * This is a tree showing the attributes of each widget. It appears like | |
81 | * /sys/bus/hdaudioC0D0/widgets/04/caps | |
82 | */ | |
83 | ||
84 | struct widget_attribute; | |
85 | ||
86 | struct widget_attribute { | |
87 | struct attribute attr; | |
88 | ssize_t (*show)(struct hdac_device *codec, hda_nid_t nid, | |
89 | struct widget_attribute *attr, char *buf); | |
90 | ssize_t (*store)(struct hdac_device *codec, hda_nid_t nid, | |
91 | struct widget_attribute *attr, | |
92 | const char *buf, size_t count); | |
93 | }; | |
94 | ||
95 | static int get_codec_nid(struct kobject *kobj, struct hdac_device **codecp) | |
96 | { | |
97 | struct device *dev = kobj_to_dev(kobj->parent->parent); | |
98 | int nid; | |
99 | ssize_t ret; | |
100 | ||
101 | ret = kstrtoint(kobj->name, 16, &nid); | |
102 | if (ret < 0) | |
103 | return ret; | |
104 | *codecp = dev_to_hdac_dev(dev); | |
105 | return nid; | |
106 | } | |
107 | ||
108 | static ssize_t widget_attr_show(struct kobject *kobj, struct attribute *attr, | |
109 | char *buf) | |
110 | { | |
111 | struct widget_attribute *wid_attr = | |
112 | container_of(attr, struct widget_attribute, attr); | |
113 | struct hdac_device *codec; | |
114 | int nid; | |
115 | ||
116 | if (!wid_attr->show) | |
117 | return -EIO; | |
118 | nid = get_codec_nid(kobj, &codec); | |
119 | if (nid < 0) | |
120 | return nid; | |
121 | return wid_attr->show(codec, nid, wid_attr, buf); | |
122 | } | |
123 | ||
124 | static ssize_t widget_attr_store(struct kobject *kobj, struct attribute *attr, | |
125 | const char *buf, size_t count) | |
126 | { | |
127 | struct widget_attribute *wid_attr = | |
128 | container_of(attr, struct widget_attribute, attr); | |
129 | struct hdac_device *codec; | |
130 | int nid; | |
131 | ||
132 | if (!wid_attr->store) | |
133 | return -EIO; | |
134 | nid = get_codec_nid(kobj, &codec); | |
135 | if (nid < 0) | |
136 | return nid; | |
137 | return wid_attr->store(codec, nid, wid_attr, buf, count); | |
138 | } | |
139 | ||
140 | static const struct sysfs_ops widget_sysfs_ops = { | |
141 | .show = widget_attr_show, | |
142 | .store = widget_attr_store, | |
143 | }; | |
144 | ||
145 | static void widget_release(struct kobject *kobj) | |
146 | { | |
147 | kfree(kobj); | |
148 | } | |
149 | ||
150 | static struct kobj_type widget_ktype = { | |
151 | .release = widget_release, | |
152 | .sysfs_ops = &widget_sysfs_ops, | |
153 | }; | |
154 | ||
155 | #define WIDGET_ATTR_RO(_name) \ | |
156 | struct widget_attribute wid_attr_##_name = __ATTR_RO(_name) | |
157 | #define WIDGET_ATTR_RW(_name) \ | |
158 | struct widget_attribute wid_attr_##_name = __ATTR_RW(_name) | |
159 | ||
160 | static ssize_t caps_show(struct hdac_device *codec, hda_nid_t nid, | |
161 | struct widget_attribute *attr, char *buf) | |
162 | { | |
163 | return sprintf(buf, "0x%08x\n", get_wcaps(codec, nid)); | |
164 | } | |
165 | ||
166 | static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
167 | struct widget_attribute *attr, char *buf) | |
168 | { | |
169 | if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN) | |
170 | return 0; | |
171 | return sprintf(buf, "0x%08x\n", | |
172 | snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP)); | |
173 | } | |
174 | ||
175 | static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid, | |
176 | struct widget_attribute *attr, char *buf) | |
177 | { | |
178 | unsigned int val; | |
179 | ||
180 | if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN) | |
181 | return 0; | |
182 | if (snd_hdac_read(codec, nid, AC_VERB_GET_CONFIG_DEFAULT, 0, &val)) | |
183 | return 0; | |
184 | return sprintf(buf, "0x%08x\n", val); | |
185 | } | |
186 | ||
187 | static bool has_pcm_cap(struct hdac_device *codec, hda_nid_t nid) | |
188 | { | |
189 | if (nid == codec->afg || nid == codec->mfg) | |
190 | return true; | |
191 | switch (get_wcaps_type(get_wcaps(codec, nid))) { | |
192 | case AC_WID_AUD_OUT: | |
193 | case AC_WID_AUD_IN: | |
194 | return true; | |
195 | default: | |
196 | return false; | |
197 | } | |
198 | } | |
199 | ||
200 | static ssize_t pcm_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
201 | struct widget_attribute *attr, char *buf) | |
202 | { | |
203 | if (!has_pcm_cap(codec, nid)) | |
204 | return 0; | |
205 | return sprintf(buf, "0x%08x\n", | |
206 | snd_hdac_read_parm(codec, nid, AC_PAR_PCM)); | |
207 | } | |
208 | ||
209 | static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid, | |
210 | struct widget_attribute *attr, char *buf) | |
211 | { | |
212 | if (!has_pcm_cap(codec, nid)) | |
213 | return 0; | |
214 | return sprintf(buf, "0x%08x\n", | |
215 | snd_hdac_read_parm(codec, nid, AC_PAR_STREAM)); | |
216 | } | |
217 | ||
218 | static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
219 | struct widget_attribute *attr, char *buf) | |
220 | { | |
221 | if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP)) | |
222 | return 0; | |
223 | return sprintf(buf, "0x%08x\n", | |
224 | snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP)); | |
225 | } | |
226 | ||
227 | static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
228 | struct widget_attribute *attr, char *buf) | |
229 | { | |
230 | if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP)) | |
231 | return 0; | |
232 | return sprintf(buf, "0x%08x\n", | |
233 | snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP)); | |
234 | } | |
235 | ||
236 | static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
237 | struct widget_attribute *attr, char *buf) | |
238 | { | |
239 | if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER)) | |
240 | return 0; | |
241 | return sprintf(buf, "0x%08x\n", | |
242 | snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE)); | |
243 | } | |
244 | ||
245 | static ssize_t gpio_caps_show(struct hdac_device *codec, hda_nid_t nid, | |
246 | struct widget_attribute *attr, char *buf) | |
247 | { | |
248 | return sprintf(buf, "0x%08x\n", | |
249 | snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP)); | |
250 | } | |
251 | ||
252 | static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid, | |
253 | struct widget_attribute *attr, char *buf) | |
254 | { | |
255 | hda_nid_t list[32]; | |
256 | int i, nconns; | |
257 | ssize_t ret = 0; | |
258 | ||
259 | nconns = snd_hdac_get_connections(codec, nid, list, ARRAY_SIZE(list)); | |
260 | if (nconns <= 0) | |
261 | return nconns; | |
262 | for (i = 0; i < nconns; i++) | |
263 | ret += sprintf(buf + ret, "%s0x%02x", i ? " " : "", list[i]); | |
264 | ret += sprintf(buf + ret, "\n"); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static WIDGET_ATTR_RO(caps); | |
269 | static WIDGET_ATTR_RO(pin_caps); | |
270 | static WIDGET_ATTR_RO(pin_cfg); | |
271 | static WIDGET_ATTR_RO(pcm_caps); | |
272 | static WIDGET_ATTR_RO(pcm_formats); | |
273 | static WIDGET_ATTR_RO(amp_in_caps); | |
274 | static WIDGET_ATTR_RO(amp_out_caps); | |
275 | static WIDGET_ATTR_RO(power_caps); | |
276 | static WIDGET_ATTR_RO(gpio_caps); | |
277 | static WIDGET_ATTR_RO(connections); | |
278 | ||
279 | static struct attribute *widget_node_attrs[] = { | |
280 | &wid_attr_caps.attr, | |
281 | &wid_attr_pin_caps.attr, | |
282 | &wid_attr_pin_cfg.attr, | |
283 | &wid_attr_pcm_caps.attr, | |
284 | &wid_attr_pcm_formats.attr, | |
285 | &wid_attr_amp_in_caps.attr, | |
286 | &wid_attr_amp_out_caps.attr, | |
287 | &wid_attr_power_caps.attr, | |
288 | &wid_attr_connections.attr, | |
289 | NULL, | |
290 | }; | |
291 | ||
292 | static struct attribute *widget_afg_attrs[] = { | |
293 | &wid_attr_pcm_caps.attr, | |
294 | &wid_attr_pcm_formats.attr, | |
295 | &wid_attr_amp_in_caps.attr, | |
296 | &wid_attr_amp_out_caps.attr, | |
297 | &wid_attr_power_caps.attr, | |
298 | &wid_attr_gpio_caps.attr, | |
299 | NULL, | |
300 | }; | |
301 | ||
302 | static const struct attribute_group widget_node_group = { | |
303 | .attrs = widget_node_attrs, | |
304 | }; | |
305 | ||
306 | static const struct attribute_group widget_afg_group = { | |
307 | .attrs = widget_afg_attrs, | |
308 | }; | |
309 | ||
310 | static void free_widget_node(struct kobject *kobj, | |
311 | const struct attribute_group *group) | |
312 | { | |
313 | if (kobj) { | |
314 | sysfs_remove_group(kobj, group); | |
315 | kobject_put(kobj); | |
316 | } | |
317 | } | |
318 | ||
319 | static void widget_tree_free(struct hdac_device *codec) | |
320 | { | |
321 | struct hdac_widget_tree *tree = codec->widgets; | |
322 | struct kobject **p; | |
323 | ||
324 | if (!tree) | |
325 | return; | |
142267c9 | 326 | free_widget_node(tree->afg, &widget_afg_group); |
3256be65 TI |
327 | if (tree->nodes) { |
328 | for (p = tree->nodes; *p; p++) | |
329 | free_widget_node(*p, &widget_node_group); | |
330 | kfree(tree->nodes); | |
331 | } | |
24d9b755 | 332 | kobject_put(tree->root); |
3256be65 TI |
333 | kfree(tree); |
334 | codec->widgets = NULL; | |
335 | } | |
336 | ||
337 | static int add_widget_node(struct kobject *parent, hda_nid_t nid, | |
338 | const struct attribute_group *group, | |
339 | struct kobject **res) | |
340 | { | |
341 | struct kobject *kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); | |
342 | int err; | |
343 | ||
344 | if (!kobj) | |
345 | return -ENOMEM; | |
346 | kobject_init(kobj, &widget_ktype); | |
347 | err = kobject_add(kobj, parent, "%02x", nid); | |
348 | if (err < 0) | |
349 | return err; | |
350 | err = sysfs_create_group(kobj, group); | |
351 | if (err < 0) { | |
352 | kobject_put(kobj); | |
353 | return err; | |
354 | } | |
355 | ||
356 | *res = kobj; | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int widget_tree_create(struct hdac_device *codec) | |
361 | { | |
362 | struct hdac_widget_tree *tree; | |
363 | int i, err; | |
364 | hda_nid_t nid; | |
365 | ||
366 | tree = codec->widgets = kzalloc(sizeof(*tree), GFP_KERNEL); | |
367 | if (!tree) | |
368 | return -ENOMEM; | |
369 | ||
370 | tree->root = kobject_create_and_add("widgets", &codec->dev.kobj); | |
371 | if (!tree->root) | |
372 | return -ENOMEM; | |
373 | ||
3256be65 TI |
374 | tree->nodes = kcalloc(codec->num_nodes + 1, sizeof(*tree->nodes), |
375 | GFP_KERNEL); | |
376 | if (!tree->nodes) | |
377 | return -ENOMEM; | |
378 | ||
379 | for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) { | |
380 | err = add_widget_node(tree->root, nid, &widget_node_group, | |
381 | &tree->nodes[i]); | |
382 | if (err < 0) | |
383 | return err; | |
384 | } | |
385 | ||
142267c9 TI |
386 | if (codec->afg) { |
387 | err = add_widget_node(tree->root, codec->afg, | |
388 | &widget_afg_group, &tree->afg); | |
389 | if (err < 0) | |
390 | return err; | |
391 | } | |
392 | ||
3256be65 TI |
393 | kobject_uevent(tree->root, KOBJ_CHANGE); |
394 | return 0; | |
395 | } | |
396 | ||
397 | int hda_widget_sysfs_init(struct hdac_device *codec) | |
398 | { | |
399 | int err; | |
400 | ||
a92d5ee8 TI |
401 | if (codec->widgets) |
402 | return 0; /* already created */ | |
403 | ||
3256be65 TI |
404 | err = widget_tree_create(codec); |
405 | if (err < 0) { | |
406 | widget_tree_free(codec); | |
407 | return err; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | void hda_widget_sysfs_exit(struct hdac_device *codec) | |
414 | { | |
415 | widget_tree_free(codec); | |
416 | } |