2 * HD-audio codec driver binding
3 * Copyright (c) Takashi Iwai <tiwai@suse.de>
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>
12 #include <sound/core.h>
13 #include "hda_codec.h"
14 #include "hda_local.h"
16 /* codec vendor labels */
17 struct hda_vendor_id {
22 static struct hda_vendor_id hda_vendor_ids[] = {
24 { 0x1013, "Cirrus Logic" },
25 { 0x1057, "Motorola" },
26 { 0x1095, "Silicon Image" },
28 { 0x10ec, "Realtek" },
29 { 0x1102, "Creative" },
33 { 0x11d4, "Analog Devices" },
34 { 0x13f6, "C-Media" },
35 { 0x14f1, "Conexant" },
36 { 0x17e8, "Chrontel" },
38 { 0x1aec, "Wolfson Microelectronics" },
40 { 0x434d, "C-Media" },
42 { 0x8384, "SigmaTel" },
47 * find a matching codec preset
49 static int hda_bus_match(struct device *dev, struct device_driver *drv)
51 struct hda_codec *codec = container_of(dev, struct hda_codec, dev);
52 struct hda_codec_driver *driver =
53 container_of(drv, struct hda_codec_driver, driver);
54 const struct hda_codec_preset *preset;
55 /* check probe_id instead of vendor_id if set */
56 u32 id = codec->probe_id ? codec->probe_id : codec->vendor_id;
58 for (preset = driver->preset; preset->id; preset++) {
59 u32 mask = preset->mask;
61 if (preset->afg && preset->afg != codec->afg)
63 if (preset->mfg && preset->mfg != codec->mfg)
67 if (preset->id == (id & mask) &&
68 (!preset->rev || preset->rev == codec->revision_id)) {
69 codec->preset = preset;
76 /* reset the codec name from the preset */
77 static int codec_refresh_name(struct hda_codec *codec, const char *name)
81 kfree(codec->chip_name);
83 sprintf(tmp, "ID %x", codec->vendor_id & 0xffff);
86 codec->chip_name = kstrdup(name, GFP_KERNEL);
87 return codec->chip_name ? 0 : -ENOMEM;
90 static int hda_codec_driver_probe(struct device *dev)
92 struct hda_codec *codec = dev_to_hda_codec(dev);
93 struct module *owner = dev->driver->owner;
96 if (WARN_ON(!codec->preset))
99 err = codec_refresh_name(codec, codec->preset->name);
103 if (!try_module_get(owner)) {
108 err = codec->preset->patch(codec);
117 codec->preset = NULL;
118 memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
122 static int hda_codec_driver_remove(struct device *dev)
124 struct hda_codec *codec = dev_to_hda_codec(dev);
126 if (codec->patch_ops.free)
127 codec->patch_ops.free(codec);
128 codec->preset = NULL;
129 memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));
130 module_put(dev->driver->owner);
134 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
135 struct module *owner)
137 drv->driver.name = name;
138 drv->driver.owner = owner;
139 drv->driver.bus = &snd_hda_bus_type;
140 drv->driver.probe = hda_codec_driver_probe;
141 drv->driver.remove = hda_codec_driver_remove;
142 drv->driver.pm = &hda_codec_driver_pm;
143 return driver_register(&drv->driver);
145 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
147 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
149 driver_unregister(&drv->driver);
151 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
153 static inline bool codec_probed(struct hda_codec *codec)
155 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
158 /* try to auto-load and bind the codec module */
159 static void codec_bind_module(struct hda_codec *codec)
162 request_module("snd-hda-codec-id:%08x", codec->vendor_id);
163 if (codec_probed(codec))
165 request_module("snd-hda-codec-id:%04x*",
166 (codec->vendor_id >> 16) & 0xffff);
167 if (codec_probed(codec))
172 /* store the codec vendor name */
173 static int get_codec_vendor_name(struct hda_codec *codec)
175 const struct hda_vendor_id *c;
176 const char *vendor = NULL;
177 u16 vendor_id = codec->vendor_id >> 16;
180 for (c = hda_vendor_ids; c->id; c++) {
181 if (c->id == vendor_id) {
187 sprintf(tmp, "Generic %04x", vendor_id);
190 codec->vendor_name = kstrdup(vendor, GFP_KERNEL);
191 if (!codec->vendor_name)
196 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
197 /* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
198 static bool is_likely_hdmi_codec(struct hda_codec *codec)
200 hda_nid_t nid = codec->start_nid;
203 for (i = 0; i < codec->num_nodes; i++, nid++) {
204 unsigned int wcaps = get_wcaps(codec, nid);
205 switch (get_wcaps_type(wcaps)) {
207 return false; /* HDMI parser supports only HDMI out */
209 if (!(wcaps & AC_WCAP_DIGITAL))
217 /* no HDMI codec parser support */
218 #define is_likely_hdmi_codec(codec) false
219 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
221 static int codec_bind_generic(struct hda_codec *codec)
226 if (is_likely_hdmi_codec(codec)) {
227 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
228 #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
229 request_module("snd-hda-codec-hdmi");
231 if (codec_probed(codec))
235 codec->probe_id = HDA_CODEC_ID_GENERIC;
236 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
237 request_module("snd-hda-codec-generic");
239 if (codec_probed(codec))
244 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
245 #define is_generic_config(codec) \
246 (codec->modelname && !strcmp(codec->modelname, "generic"))
248 #define is_generic_config(codec) 0
252 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
253 * @codec: the HDA codec
255 * Start parsing of the given codec tree and (re-)initialize the whole
258 * Returns 0 if successful or a negative error code.
260 int snd_hda_codec_configure(struct hda_codec *codec)
264 if (!codec->vendor_name) {
265 err = get_codec_vendor_name(codec);
270 if (is_generic_config(codec))
271 codec->probe_id = HDA_CODEC_ID_GENERIC;
275 err = device_add(hda_codec_dev(codec));
280 codec_bind_module(codec);
281 if (!codec->preset) {
282 err = codec_bind_generic(codec);
284 codec_err(codec, "Unable to bind the codec\n");
289 /* audio codec should override the mixer name */
290 if (codec->afg || !*codec->bus->card->mixername)
291 snprintf(codec->bus->card->mixername,
292 sizeof(codec->bus->card->mixername),
293 "%s %s", codec->vendor_name, codec->chip_name);
297 device_del(hda_codec_dev(codec));
300 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
305 struct bus_type snd_hda_bus_type = {
307 .match = hda_bus_match,
310 static int __init hda_codec_init(void)
312 return bus_register(&snd_hda_bus_type);
315 static void __exit hda_codec_exit(void)
317 bus_unregister(&snd_hda_bus_type);
320 module_init(hda_codec_init);
321 module_exit(hda_codec_exit);