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6#include <linux/init.h>
7#include <linux/slab.h>
8#include <linux/mutex.h>
9#include <linux/module.h>
10#include <linux/export.h>
11#include <linux/pm.h>
12#include <linux/pm_runtime.h>
13#include <sound/core.h>
14#include "hda_codec.h"
15#include "hda_local.h"
16
17
18
19
20static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
21{
22 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
23 struct hda_codec_driver *driver =
24 container_of(drv, struct hda_codec_driver, core);
25 const struct hda_codec_preset *preset;
26
27 u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
28
29 for (preset = driver->preset; preset->id; preset++) {
30 if (preset->id == id &&
31 (!preset->rev || preset->rev == codec->core.revision_id)) {
32 codec->preset = preset;
33 return 1;
34 }
35 }
36 return 0;
37}
38
39
40static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
41{
42 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
43
44 if (codec->patch_ops.unsol_event)
45 codec->patch_ops.unsol_event(codec, ev);
46}
47
48
49static int codec_refresh_name(struct hda_codec *codec, const char *name)
50{
51 if (name) {
52 kfree(codec->core.chip_name);
53 codec->core.chip_name = kstrdup(name, GFP_KERNEL);
54 }
55 return codec->core.chip_name ? 0 : -ENOMEM;
56}
57
58static int hda_codec_driver_probe(struct device *dev)
59{
60 struct hda_codec *codec = dev_to_hda_codec(dev);
61 struct module *owner = dev->driver->owner;
62 int err;
63
64 if (WARN_ON(!codec->preset))
65 return -EINVAL;
66
67 err = codec_refresh_name(codec, codec->preset->name);
68 if (err < 0)
69 goto error;
70 err = snd_hdac_regmap_init(&codec->core);
71 if (err < 0)
72 goto error;
73
74 if (!try_module_get(owner)) {
75 err = -EINVAL;
76 goto error;
77 }
78
79 err = codec->preset->patch(codec);
80 if (err < 0)
81 goto error_module;
82
83 err = snd_hda_codec_build_pcms(codec);
84 if (err < 0)
85 goto error_module;
86 err = snd_hda_codec_build_controls(codec);
87 if (err < 0)
88 goto error_module;
89 if (codec->card->registered) {
90 err = snd_card_register(codec->card);
91 if (err < 0)
92 goto error_module;
93 snd_hda_codec_register(codec);
94 }
95
96 codec->core.lazy_cache = true;
97 return 0;
98
99 error_module:
100 module_put(owner);
101
102 error:
103 snd_hda_codec_cleanup_for_unbind(codec);
104 return err;
105}
106
107static int hda_codec_driver_remove(struct device *dev)
108{
109 struct hda_codec *codec = dev_to_hda_codec(dev);
110
111 if (codec->patch_ops.free)
112 codec->patch_ops.free(codec);
113 snd_hda_codec_cleanup_for_unbind(codec);
114 module_put(dev->driver->owner);
115 return 0;
116}
117
118static void hda_codec_driver_shutdown(struct device *dev)
119{
120 struct hda_codec *codec = dev_to_hda_codec(dev);
121
122 if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
123 codec->patch_ops.reboot_notify(codec);
124}
125
126int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
127 struct module *owner)
128{
129 drv->core.driver.name = name;
130 drv->core.driver.owner = owner;
131 drv->core.driver.bus = &snd_hda_bus_type;
132 drv->core.driver.probe = hda_codec_driver_probe;
133 drv->core.driver.remove = hda_codec_driver_remove;
134 drv->core.driver.shutdown = hda_codec_driver_shutdown;
135 drv->core.driver.pm = &hda_codec_driver_pm;
136 drv->core.type = HDA_DEV_LEGACY;
137 drv->core.match = hda_codec_match;
138 drv->core.unsol_event = hda_codec_unsol_event;
139 return driver_register(&drv->core.driver);
140}
141EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
142
143void hda_codec_driver_unregister(struct hda_codec_driver *drv)
144{
145 driver_unregister(&drv->core.driver);
146}
147EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
148
149static inline bool codec_probed(struct hda_codec *codec)
150{
151 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
152}
153
154
155static void codec_bind_module(struct hda_codec *codec)
156{
157#ifdef MODULE
158 request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
159 if (codec_probed(codec))
160 return;
161 request_module("snd-hda-codec-id:%04x*",
162 (codec->core.vendor_id >> 16) & 0xffff);
163 if (codec_probed(codec))
164 return;
165#endif
166}
167
168#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
169
170static bool is_likely_hdmi_codec(struct hda_codec *codec)
171{
172 hda_nid_t nid;
173
174 for_each_hda_codec_node(nid, codec) {
175 unsigned int wcaps = get_wcaps(codec, nid);
176 switch (get_wcaps_type(wcaps)) {
177 case AC_WID_AUD_IN:
178 return false;
179 case AC_WID_AUD_OUT:
180 if (!(wcaps & AC_WCAP_DIGITAL))
181 return false;
182 break;
183 }
184 }
185 return true;
186}
187#else
188
189#define is_likely_hdmi_codec(codec) false
190#endif
191
192static int codec_bind_generic(struct hda_codec *codec)
193{
194 if (codec->probe_id)
195 return -ENODEV;
196
197 if (is_likely_hdmi_codec(codec)) {
198 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
199#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
200 request_module("snd-hda-codec-hdmi");
201#endif
202 if (codec_probed(codec))
203 return 0;
204 }
205
206 codec->probe_id = HDA_CODEC_ID_GENERIC;
207#if IS_MODULE(CONFIG_SND_HDA_GENERIC)
208 request_module("snd-hda-codec-generic");
209#endif
210 if (codec_probed(codec))
211 return 0;
212 return -ENODEV;
213}
214
215#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
216#define is_generic_config(codec) \
217 (codec->modelname && !strcmp(codec->modelname, "generic"))
218#else
219#define is_generic_config(codec) 0
220#endif
221
222
223
224
225
226
227
228
229
230
231int snd_hda_codec_configure(struct hda_codec *codec)
232{
233 int err;
234
235 if (is_generic_config(codec))
236 codec->probe_id = HDA_CODEC_ID_GENERIC;
237 else
238 codec->probe_id = 0;
239
240 err = snd_hdac_device_register(&codec->core);
241 if (err < 0)
242 return err;
243
244 if (!codec->preset)
245 codec_bind_module(codec);
246 if (!codec->preset) {
247 err = codec_bind_generic(codec);
248 if (err < 0) {
249 codec_err(codec, "Unable to bind the codec\n");
250 goto error;
251 }
252 }
253
254
255 if (codec->core.afg || !*codec->card->mixername)
256 snprintf(codec->card->mixername,
257 sizeof(codec->card->mixername), "%s %s",
258 codec->core.vendor_name, codec->core.chip_name);
259 return 0;
260
261 error:
262 snd_hdac_device_unregister(&codec->core);
263 return err;
264}
265EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
266