ARM: 9148/1: handle CONFIG_CPU_ENDIAN_BE32 in arch/arm/kernel/head.S
[platform/kernel/linux-rpi.git] / sound / pci / hda / hda_bind.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * HD-audio codec driver binding
4  * Copyright (c) Takashi Iwai <tiwai@suse.de>
5  */
6
7 #include <linux/init.h>
8 #include <linux/slab.h>
9 #include <linux/mutex.h>
10 #include <linux/module.h>
11 #include <linux/export.h>
12 #include <linux/pm.h>
13 #include <linux/pm_runtime.h>
14 #include <sound/core.h>
15 #include <sound/hda_codec.h>
16 #include "hda_local.h"
17
18 /*
19  * find a matching codec id
20  */
21 static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
22 {
23         struct hda_codec *codec = container_of(dev, struct hda_codec, core);
24         struct hda_codec_driver *driver =
25                 container_of(drv, struct hda_codec_driver, core);
26         const struct hda_device_id *list;
27         /* check probe_id instead of vendor_id if set */
28         u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
29         u32 rev_id = codec->core.revision_id;
30
31         for (list = driver->id; list->vendor_id; list++) {
32                 if (list->vendor_id == id &&
33                     (!list->rev_id || list->rev_id == rev_id)) {
34                         codec->preset = list;
35                         return 1;
36                 }
37         }
38         return 0;
39 }
40
41 /* process an unsolicited event */
42 static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
43 {
44         struct hda_codec *codec = container_of(dev, struct hda_codec, core);
45
46         /* ignore unsol events during shutdown */
47         if (codec->bus->shutdown)
48                 return;
49
50         /* ignore unsol events during system suspend/resume */
51         if (codec->core.dev.power.power_state.event != PM_EVENT_ON)
52                 return;
53
54         if (codec->patch_ops.unsol_event)
55                 codec->patch_ops.unsol_event(codec, ev);
56 }
57
58 /**
59  * snd_hda_codec_set_name - set the codec name
60  * @codec: the HDA codec
61  * @name: name string to set
62  */
63 int snd_hda_codec_set_name(struct hda_codec *codec, const char *name)
64 {
65         int err;
66
67         if (!name)
68                 return 0;
69         err = snd_hdac_device_set_chip_name(&codec->core, name);
70         if (err < 0)
71                 return err;
72
73         /* update the mixer name */
74         if (!*codec->card->mixername ||
75             codec->bus->mixer_assigned >= codec->core.addr) {
76                 snprintf(codec->card->mixername,
77                          sizeof(codec->card->mixername), "%s %s",
78                          codec->core.vendor_name, codec->core.chip_name);
79                 codec->bus->mixer_assigned = codec->core.addr;
80         }
81
82         return 0;
83 }
84 EXPORT_SYMBOL_GPL(snd_hda_codec_set_name);
85
86 static int hda_codec_driver_probe(struct device *dev)
87 {
88         struct hda_codec *codec = dev_to_hda_codec(dev);
89         struct module *owner = dev->driver->owner;
90         hda_codec_patch_t patch;
91         int err;
92
93         if (codec->bus->core.ext_ops) {
94                 if (WARN_ON(!codec->bus->core.ext_ops->hdev_attach))
95                         return -EINVAL;
96                 return codec->bus->core.ext_ops->hdev_attach(&codec->core);
97         }
98
99         if (WARN_ON(!codec->preset))
100                 return -EINVAL;
101
102         err = snd_hda_codec_set_name(codec, codec->preset->name);
103         if (err < 0)
104                 goto error;
105         err = snd_hdac_regmap_init(&codec->core);
106         if (err < 0)
107                 goto error;
108
109         if (!try_module_get(owner)) {
110                 err = -EINVAL;
111                 goto error;
112         }
113
114         patch = (hda_codec_patch_t)codec->preset->driver_data;
115         if (patch) {
116                 err = patch(codec);
117                 if (err < 0)
118                         goto error_module_put;
119         }
120
121         err = snd_hda_codec_build_pcms(codec);
122         if (err < 0)
123                 goto error_module;
124         err = snd_hda_codec_build_controls(codec);
125         if (err < 0)
126                 goto error_module;
127         /* only register after the bus probe finished; otherwise it's racy */
128         if (!codec->bus->bus_probing && codec->card->registered) {
129                 err = snd_card_register(codec->card);
130                 if (err < 0)
131                         goto error_module;
132                 snd_hda_codec_register(codec);
133         }
134
135         codec->core.lazy_cache = true;
136         return 0;
137
138  error_module:
139         if (codec->patch_ops.free)
140                 codec->patch_ops.free(codec);
141  error_module_put:
142         module_put(owner);
143
144  error:
145         snd_hda_codec_cleanup_for_unbind(codec);
146         return err;
147 }
148
149 static int hda_codec_driver_remove(struct device *dev)
150 {
151         struct hda_codec *codec = dev_to_hda_codec(dev);
152
153         if (codec->bus->core.ext_ops) {
154                 if (WARN_ON(!codec->bus->core.ext_ops->hdev_detach))
155                         return -EINVAL;
156                 return codec->bus->core.ext_ops->hdev_detach(&codec->core);
157         }
158
159         if (codec->patch_ops.free)
160                 codec->patch_ops.free(codec);
161         snd_hda_codec_cleanup_for_unbind(codec);
162         module_put(dev->driver->owner);
163         return 0;
164 }
165
166 static void hda_codec_driver_shutdown(struct device *dev)
167 {
168         snd_hda_codec_shutdown(dev_to_hda_codec(dev));
169 }
170
171 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
172                                struct module *owner)
173 {
174         drv->core.driver.name = name;
175         drv->core.driver.owner = owner;
176         drv->core.driver.bus = &snd_hda_bus_type;
177         drv->core.driver.probe = hda_codec_driver_probe;
178         drv->core.driver.remove = hda_codec_driver_remove;
179         drv->core.driver.shutdown = hda_codec_driver_shutdown;
180         drv->core.driver.pm = &hda_codec_driver_pm;
181         drv->core.type = HDA_DEV_LEGACY;
182         drv->core.match = hda_codec_match;
183         drv->core.unsol_event = hda_codec_unsol_event;
184         return driver_register(&drv->core.driver);
185 }
186 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
187
188 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
189 {
190         driver_unregister(&drv->core.driver);
191 }
192 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
193
194 static inline bool codec_probed(struct hda_codec *codec)
195 {
196         return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
197 }
198
199 /* try to auto-load codec module */
200 static void request_codec_module(struct hda_codec *codec)
201 {
202 #ifdef MODULE
203         char modalias[32];
204         const char *mod = NULL;
205
206         switch (codec->probe_id) {
207         case HDA_CODEC_ID_GENERIC_HDMI:
208 #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
209                 mod = "snd-hda-codec-hdmi";
210 #endif
211                 break;
212         case HDA_CODEC_ID_GENERIC:
213 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
214                 mod = "snd-hda-codec-generic";
215 #endif
216                 break;
217         default:
218                 snd_hdac_codec_modalias(&codec->core, modalias, sizeof(modalias));
219                 mod = modalias;
220                 break;
221         }
222
223         if (mod)
224                 request_module(mod);
225 #endif /* MODULE */
226 }
227
228 /* try to auto-load and bind the codec module */
229 static void codec_bind_module(struct hda_codec *codec)
230 {
231 #ifdef MODULE
232         request_codec_module(codec);
233         if (codec_probed(codec))
234                 return;
235 #endif
236 }
237
238 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
239 /* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
240 static bool is_likely_hdmi_codec(struct hda_codec *codec)
241 {
242         hda_nid_t nid;
243
244         for_each_hda_codec_node(nid, codec) {
245                 unsigned int wcaps = get_wcaps(codec, nid);
246                 switch (get_wcaps_type(wcaps)) {
247                 case AC_WID_AUD_IN:
248                         return false; /* HDMI parser supports only HDMI out */
249                 case AC_WID_AUD_OUT:
250                         if (!(wcaps & AC_WCAP_DIGITAL))
251                                 return false;
252                         break;
253                 }
254         }
255         return true;
256 }
257 #else
258 /* no HDMI codec parser support */
259 #define is_likely_hdmi_codec(codec)     false
260 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
261
262 static int codec_bind_generic(struct hda_codec *codec)
263 {
264         if (codec->probe_id)
265                 return -ENODEV;
266
267         if (is_likely_hdmi_codec(codec)) {
268                 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
269                 request_codec_module(codec);
270                 if (codec_probed(codec))
271                         return 0;
272         }
273
274         codec->probe_id = HDA_CODEC_ID_GENERIC;
275         request_codec_module(codec);
276         if (codec_probed(codec))
277                 return 0;
278         return -ENODEV;
279 }
280
281 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
282 #define is_generic_config(codec) \
283         (codec->modelname && !strcmp(codec->modelname, "generic"))
284 #else
285 #define is_generic_config(codec)        0
286 #endif
287
288 /**
289  * snd_hda_codec_configure - (Re-)configure the HD-audio codec
290  * @codec: the HDA codec
291  *
292  * Start parsing of the given codec tree and (re-)initialize the whole
293  * patch instance.
294  *
295  * Returns 0 if successful or a negative error code.
296  */
297 int snd_hda_codec_configure(struct hda_codec *codec)
298 {
299         int err;
300
301         if (is_generic_config(codec))
302                 codec->probe_id = HDA_CODEC_ID_GENERIC;
303         else
304                 codec->probe_id = 0;
305
306         err = snd_hdac_device_register(&codec->core);
307         if (err < 0)
308                 return err;
309
310         if (!codec->preset)
311                 codec_bind_module(codec);
312         if (!codec->preset) {
313                 err = codec_bind_generic(codec);
314                 if (err < 0) {
315                         codec_err(codec, "Unable to bind the codec\n");
316                         goto error;
317                 }
318         }
319
320         return 0;
321
322  error:
323         snd_hdac_device_unregister(&codec->core);
324         return err;
325 }
326 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);