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2807314d TI |
1 | /* |
2 | * HWDEP Interface for HD-audio codec | |
3 | * | |
4 | * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de> | |
5 | * | |
6 | * This driver is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This driver is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
2807314d TI |
21 | #include <linux/init.h> |
22 | #include <linux/slab.h> | |
23 | #include <linux/pci.h> | |
24 | #include <linux/compat.h> | |
25 | #include <linux/mutex.h> | |
1e1be432 | 26 | #include <linux/ctype.h> |
2807314d TI |
27 | #include <sound/core.h> |
28 | #include "hda_codec.h" | |
29 | #include "hda_local.h" | |
30 | #include <sound/hda_hwdep.h> | |
d7ffba19 | 31 | #include <sound/minors.h> |
2807314d TI |
32 | |
33 | /* | |
34 | * write/read an out-of-bound verb | |
35 | */ | |
36 | static int verb_write_ioctl(struct hda_codec *codec, | |
37 | struct hda_verb_ioctl __user *arg) | |
38 | { | |
39 | u32 verb, res; | |
40 | ||
41 | if (get_user(verb, &arg->verb)) | |
42 | return -EFAULT; | |
43 | res = snd_hda_codec_read(codec, verb >> 24, 0, | |
44 | (verb >> 8) & 0xffff, verb & 0xff); | |
45 | if (put_user(res, &arg->res)) | |
46 | return -EFAULT; | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static int get_wcap_ioctl(struct hda_codec *codec, | |
51 | struct hda_verb_ioctl __user *arg) | |
52 | { | |
53 | u32 verb, res; | |
54 | ||
55 | if (get_user(verb, &arg->verb)) | |
56 | return -EFAULT; | |
57 | res = get_wcaps(codec, verb >> 24); | |
58 | if (put_user(res, &arg->res)) | |
59 | return -EFAULT; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | ||
64 | /* | |
65 | */ | |
66 | static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, | |
67 | unsigned int cmd, unsigned long arg) | |
68 | { | |
69 | struct hda_codec *codec = hw->private_data; | |
70 | void __user *argp = (void __user *)arg; | |
71 | ||
72 | switch (cmd) { | |
73 | case HDA_IOCTL_PVERSION: | |
74 | return put_user(HDA_HWDEP_VERSION, (int __user *)argp); | |
75 | case HDA_IOCTL_VERB_WRITE: | |
76 | return verb_write_ioctl(codec, argp); | |
77 | case HDA_IOCTL_GET_WCAP: | |
78 | return get_wcap_ioctl(codec, argp); | |
79 | } | |
80 | return -ENOIOCTLCMD; | |
81 | } | |
82 | ||
83 | #ifdef CONFIG_COMPAT | |
84 | static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file, | |
85 | unsigned int cmd, unsigned long arg) | |
86 | { | |
312d045c | 87 | return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg)); |
2807314d TI |
88 | } |
89 | #endif | |
90 | ||
91 | static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file) | |
92 | { | |
62cf872a | 93 | #ifndef CONFIG_SND_DEBUG_VERBOSE |
2807314d TI |
94 | if (!capable(CAP_SYS_RAWIO)) |
95 | return -EACCES; | |
96 | #endif | |
97 | return 0; | |
98 | } | |
99 | ||
11aeff08 TI |
100 | static void clear_hwdep_elements(struct hda_codec *codec) |
101 | { | |
1e1be432 TI |
102 | char **head; |
103 | int i; | |
104 | ||
11aeff08 TI |
105 | /* clear init verbs */ |
106 | snd_array_free(&codec->init_verbs); | |
1e1be432 TI |
107 | /* clear hints */ |
108 | head = codec->hints.list; | |
109 | for (i = 0; i < codec->hints.used; i++, head++) | |
110 | kfree(*head); | |
111 | snd_array_free(&codec->hints); | |
11aeff08 TI |
112 | } |
113 | ||
114 | static void hwdep_free(struct snd_hwdep *hwdep) | |
115 | { | |
116 | clear_hwdep_elements(hwdep->private_data); | |
117 | } | |
118 | ||
1289e9e8 | 119 | int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec) |
2807314d TI |
120 | { |
121 | char hwname[16]; | |
122 | struct snd_hwdep *hwdep; | |
123 | int err; | |
124 | ||
125 | sprintf(hwname, "HDA Codec %d", codec->addr); | |
126 | err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep); | |
127 | if (err < 0) | |
128 | return err; | |
129 | codec->hwdep = hwdep; | |
130 | sprintf(hwdep->name, "HDA Codec %d", codec->addr); | |
131 | hwdep->iface = SNDRV_HWDEP_IFACE_HDA; | |
132 | hwdep->private_data = codec; | |
11aeff08 | 133 | hwdep->private_free = hwdep_free; |
2807314d TI |
134 | hwdep->exclusive = 1; |
135 | ||
136 | hwdep->ops.open = hda_hwdep_open; | |
137 | hwdep->ops.ioctl = hda_hwdep_ioctl; | |
138 | #ifdef CONFIG_COMPAT | |
139 | hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat; | |
140 | #endif | |
141 | ||
11aeff08 | 142 | snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32); |
1e1be432 | 143 | snd_array_init(&codec->hints, sizeof(char *), 32); |
11aeff08 | 144 | |
2807314d TI |
145 | return 0; |
146 | } | |
d7ffba19 | 147 | |
e7ee058c TI |
148 | #ifdef CONFIG_SND_HDA_RECONFIG |
149 | ||
d7ffba19 TI |
150 | /* |
151 | * sysfs interface | |
152 | */ | |
153 | ||
154 | static int clear_codec(struct hda_codec *codec) | |
155 | { | |
156 | snd_hda_codec_reset(codec); | |
11aeff08 | 157 | clear_hwdep_elements(codec); |
d7ffba19 TI |
158 | return 0; |
159 | } | |
160 | ||
161 | static int reconfig_codec(struct hda_codec *codec) | |
162 | { | |
163 | int err; | |
164 | ||
165 | snd_printk(KERN_INFO "hda-codec: reconfiguring\n"); | |
166 | snd_hda_codec_reset(codec); | |
167 | err = snd_hda_codec_configure(codec); | |
168 | if (err < 0) | |
169 | return err; | |
170 | /* rebuild PCMs */ | |
529bd6c4 | 171 | err = snd_hda_codec_build_pcms(codec); |
d7ffba19 TI |
172 | if (err < 0) |
173 | return err; | |
174 | /* rebuild mixers */ | |
175 | err = snd_hda_codec_build_controls(codec); | |
176 | if (err < 0) | |
177 | return err; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | /* | |
182 | * allocate a string at most len chars, and remove the trailing EOL | |
183 | */ | |
184 | static char *kstrndup_noeol(const char *src, size_t len) | |
185 | { | |
186 | char *s = kstrndup(src, len, GFP_KERNEL); | |
187 | char *p; | |
188 | if (!s) | |
189 | return NULL; | |
190 | p = strchr(s, '\n'); | |
191 | if (p) | |
192 | *p = 0; | |
193 | return s; | |
194 | } | |
195 | ||
196 | #define CODEC_INFO_SHOW(type) \ | |
197 | static ssize_t type##_show(struct device *dev, \ | |
198 | struct device_attribute *attr, \ | |
199 | char *buf) \ | |
200 | { \ | |
201 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ | |
202 | struct hda_codec *codec = hwdep->private_data; \ | |
203 | return sprintf(buf, "0x%x\n", codec->type); \ | |
204 | } | |
205 | ||
206 | #define CODEC_INFO_STR_SHOW(type) \ | |
207 | static ssize_t type##_show(struct device *dev, \ | |
208 | struct device_attribute *attr, \ | |
209 | char *buf) \ | |
210 | { \ | |
211 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ | |
212 | struct hda_codec *codec = hwdep->private_data; \ | |
213 | return sprintf(buf, "%s\n", \ | |
214 | codec->type ? codec->type : ""); \ | |
215 | } | |
216 | ||
217 | CODEC_INFO_SHOW(vendor_id); | |
218 | CODEC_INFO_SHOW(subsystem_id); | |
219 | CODEC_INFO_SHOW(revision_id); | |
220 | CODEC_INFO_SHOW(afg); | |
221 | CODEC_INFO_SHOW(mfg); | |
222 | CODEC_INFO_STR_SHOW(name); | |
223 | CODEC_INFO_STR_SHOW(modelname); | |
224 | ||
225 | #define CODEC_INFO_STORE(type) \ | |
226 | static ssize_t type##_store(struct device *dev, \ | |
227 | struct device_attribute *attr, \ | |
228 | const char *buf, size_t count) \ | |
229 | { \ | |
230 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ | |
231 | struct hda_codec *codec = hwdep->private_data; \ | |
232 | char *after; \ | |
233 | codec->type = simple_strtoul(buf, &after, 0); \ | |
234 | return count; \ | |
235 | } | |
236 | ||
237 | #define CODEC_INFO_STR_STORE(type) \ | |
238 | static ssize_t type##_store(struct device *dev, \ | |
239 | struct device_attribute *attr, \ | |
240 | const char *buf, size_t count) \ | |
241 | { \ | |
242 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ | |
243 | struct hda_codec *codec = hwdep->private_data; \ | |
244 | char *s = kstrndup_noeol(buf, 64); \ | |
245 | if (!s) \ | |
246 | return -ENOMEM; \ | |
247 | kfree(codec->type); \ | |
248 | codec->type = s; \ | |
249 | return count; \ | |
250 | } | |
251 | ||
252 | CODEC_INFO_STORE(vendor_id); | |
253 | CODEC_INFO_STORE(subsystem_id); | |
254 | CODEC_INFO_STORE(revision_id); | |
255 | CODEC_INFO_STR_STORE(name); | |
256 | CODEC_INFO_STR_STORE(modelname); | |
257 | ||
258 | #define CODEC_ACTION_STORE(type) \ | |
259 | static ssize_t type##_store(struct device *dev, \ | |
260 | struct device_attribute *attr, \ | |
261 | const char *buf, size_t count) \ | |
262 | { \ | |
263 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ | |
264 | struct hda_codec *codec = hwdep->private_data; \ | |
265 | int err = 0; \ | |
266 | if (*buf) \ | |
267 | err = type##_codec(codec); \ | |
268 | return err < 0 ? err : count; \ | |
269 | } | |
270 | ||
271 | CODEC_ACTION_STORE(reconfig); | |
272 | CODEC_ACTION_STORE(clear); | |
273 | ||
11aeff08 TI |
274 | static ssize_t init_verbs_store(struct device *dev, |
275 | struct device_attribute *attr, | |
276 | const char *buf, size_t count) | |
277 | { | |
278 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); | |
279 | struct hda_codec *codec = hwdep->private_data; | |
280 | char *p; | |
281 | struct hda_verb verb, *v; | |
282 | ||
283 | verb.nid = simple_strtoul(buf, &p, 0); | |
284 | verb.verb = simple_strtoul(p, &p, 0); | |
285 | verb.param = simple_strtoul(p, &p, 0); | |
286 | if (!verb.nid || !verb.verb || !verb.param) | |
287 | return -EINVAL; | |
288 | v = snd_array_new(&codec->init_verbs); | |
289 | if (!v) | |
290 | return -ENOMEM; | |
291 | *v = verb; | |
292 | return count; | |
293 | } | |
294 | ||
1e1be432 TI |
295 | static ssize_t hints_store(struct device *dev, |
296 | struct device_attribute *attr, | |
297 | const char *buf, size_t count) | |
298 | { | |
299 | struct snd_hwdep *hwdep = dev_get_drvdata(dev); | |
300 | struct hda_codec *codec = hwdep->private_data; | |
301 | char *p; | |
302 | char **hint; | |
303 | ||
304 | if (!*buf || isspace(*buf) || *buf == '#' || *buf == '\n') | |
305 | return count; | |
306 | p = kstrndup_noeol(buf, 1024); | |
307 | if (!p) | |
308 | return -ENOMEM; | |
309 | hint = snd_array_new(&codec->hints); | |
310 | if (!hint) { | |
311 | kfree(p); | |
312 | return -ENOMEM; | |
313 | } | |
314 | *hint = p; | |
315 | return count; | |
316 | } | |
317 | ||
d7ffba19 TI |
318 | #define CODEC_ATTR_RW(type) \ |
319 | __ATTR(type, 0644, type##_show, type##_store) | |
320 | #define CODEC_ATTR_RO(type) \ | |
321 | __ATTR_RO(type) | |
322 | #define CODEC_ATTR_WO(type) \ | |
323 | __ATTR(type, 0200, NULL, type##_store) | |
324 | ||
325 | static struct device_attribute codec_attrs[] = { | |
326 | CODEC_ATTR_RW(vendor_id), | |
327 | CODEC_ATTR_RW(subsystem_id), | |
328 | CODEC_ATTR_RW(revision_id), | |
329 | CODEC_ATTR_RO(afg), | |
330 | CODEC_ATTR_RO(mfg), | |
331 | CODEC_ATTR_RW(name), | |
332 | CODEC_ATTR_RW(modelname), | |
11aeff08 | 333 | CODEC_ATTR_WO(init_verbs), |
1e1be432 | 334 | CODEC_ATTR_WO(hints), |
d7ffba19 TI |
335 | CODEC_ATTR_WO(reconfig), |
336 | CODEC_ATTR_WO(clear), | |
337 | }; | |
338 | ||
339 | /* | |
340 | * create sysfs files on hwdep directory | |
341 | */ | |
342 | int snd_hda_hwdep_add_sysfs(struct hda_codec *codec) | |
343 | { | |
344 | struct snd_hwdep *hwdep = codec->hwdep; | |
345 | int i; | |
346 | ||
347 | for (i = 0; i < ARRAY_SIZE(codec_attrs); i++) | |
348 | snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, | |
349 | hwdep->device, &codec_attrs[i]); | |
350 | return 0; | |
351 | } | |
e7ee058c TI |
352 | |
353 | #endif /* CONFIG_SND_HDA_RECONFIG */ |