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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 | ||
48 | static struct attribute *hdac_dev_attrs[] = { | |
eacf6e0a | 49 | &dev_attr_type.attr, |
3256be65 TI |
50 | &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 | ||
60 | static struct attribute_group hdac_dev_attr_group = { | |
61 | .attrs = hdac_dev_attrs, | |
62 | }; | |
63 | ||
64 | const 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 | ||
76 | struct widget_attribute; | |
77 | ||
78 | struct 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 | ||
87 | static 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 | ||
100 | static 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 | ||
116 | static 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 | ||
132 | static const struct sysfs_ops widget_sysfs_ops = { | |
133 | .show = widget_attr_show, | |
134 | .store = widget_attr_store, | |
135 | }; | |
136 | ||
137 | static void widget_release(struct kobject *kobj) | |
138 | { | |
139 | kfree(kobj); | |
140 | } | |
141 | ||
142 | static 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 | ||
152 | static 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 | ||
158 | static 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 | ||
167 | static 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 | ||
179 | static 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 | ||
192 | static 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 | ||
201 | static 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 | ||
210 | static 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 | ||
219 | static 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 | ||
228 | static 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 | ||
237 | static 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 | ||
244 | static 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 | ||
260 | static WIDGET_ATTR_RO(caps); | |
261 | static WIDGET_ATTR_RO(pin_caps); | |
262 | static WIDGET_ATTR_RO(pin_cfg); | |
263 | static WIDGET_ATTR_RO(pcm_caps); | |
264 | static WIDGET_ATTR_RO(pcm_formats); | |
265 | static WIDGET_ATTR_RO(amp_in_caps); | |
266 | static WIDGET_ATTR_RO(amp_out_caps); | |
267 | static WIDGET_ATTR_RO(power_caps); | |
268 | static WIDGET_ATTR_RO(gpio_caps); | |
269 | static WIDGET_ATTR_RO(connections); | |
270 | ||
271 | static 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 | ||
284 | static 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 | ||
294 | static const struct attribute_group widget_node_group = { | |
295 | .attrs = widget_node_attrs, | |
296 | }; | |
297 | ||
298 | static const struct attribute_group widget_afg_group = { | |
299 | .attrs = widget_afg_attrs, | |
300 | }; | |
301 | ||
302 | static 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 | ||
311 | static 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; | |
142267c9 | 318 | free_widget_node(tree->afg, &widget_afg_group); |
3256be65 TI |
319 | if (tree->nodes) { |
320 | for (p = tree->nodes; *p; p++) | |
321 | free_widget_node(*p, &widget_node_group); | |
322 | kfree(tree->nodes); | |
323 | } | |
3256be65 TI |
324 | if (tree->root) |
325 | kobject_put(tree->root); | |
326 | kfree(tree); | |
327 | codec->widgets = NULL; | |
328 | } | |
329 | ||
330 | static int add_widget_node(struct kobject *parent, hda_nid_t nid, | |
331 | const struct attribute_group *group, | |
332 | struct kobject **res) | |
333 | { | |
334 | struct kobject *kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); | |
335 | int err; | |
336 | ||
337 | if (!kobj) | |
338 | return -ENOMEM; | |
339 | kobject_init(kobj, &widget_ktype); | |
340 | err = kobject_add(kobj, parent, "%02x", nid); | |
341 | if (err < 0) | |
342 | return err; | |
343 | err = sysfs_create_group(kobj, group); | |
344 | if (err < 0) { | |
345 | kobject_put(kobj); | |
346 | return err; | |
347 | } | |
348 | ||
349 | *res = kobj; | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static int widget_tree_create(struct hdac_device *codec) | |
354 | { | |
355 | struct hdac_widget_tree *tree; | |
356 | int i, err; | |
357 | hda_nid_t nid; | |
358 | ||
359 | tree = codec->widgets = kzalloc(sizeof(*tree), GFP_KERNEL); | |
360 | if (!tree) | |
361 | return -ENOMEM; | |
362 | ||
363 | tree->root = kobject_create_and_add("widgets", &codec->dev.kobj); | |
364 | if (!tree->root) | |
365 | return -ENOMEM; | |
366 | ||
3256be65 TI |
367 | tree->nodes = kcalloc(codec->num_nodes + 1, sizeof(*tree->nodes), |
368 | GFP_KERNEL); | |
369 | if (!tree->nodes) | |
370 | return -ENOMEM; | |
371 | ||
372 | for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) { | |
373 | err = add_widget_node(tree->root, nid, &widget_node_group, | |
374 | &tree->nodes[i]); | |
375 | if (err < 0) | |
376 | return err; | |
377 | } | |
378 | ||
142267c9 TI |
379 | if (codec->afg) { |
380 | err = add_widget_node(tree->root, codec->afg, | |
381 | &widget_afg_group, &tree->afg); | |
382 | if (err < 0) | |
383 | return err; | |
384 | } | |
385 | ||
3256be65 TI |
386 | kobject_uevent(tree->root, KOBJ_CHANGE); |
387 | return 0; | |
388 | } | |
389 | ||
390 | int hda_widget_sysfs_init(struct hdac_device *codec) | |
391 | { | |
392 | int err; | |
393 | ||
394 | err = widget_tree_create(codec); | |
395 | if (err < 0) { | |
396 | widget_tree_free(codec); | |
397 | return err; | |
398 | } | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | void hda_widget_sysfs_exit(struct hdac_device *codec) | |
404 | { | |
405 | widget_tree_free(codec); | |
406 | } |