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- #include <linux/init.h>
- #include <linux/slab.h>
- #include <linux/mutex.h>
- #include <linux/module.h>
- #include <linux/export.h>
- #include <linux/pm.h>
- #include <linux/pm_runtime.h>
- #include <sound/core.h>
- #include "hda_codec.h"
- #include "hda_local.h"
- static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
- {
- struct hda_codec *codec = container_of(dev, struct hda_codec, core);
- struct hda_codec_driver *driver =
- container_of(drv, struct hda_codec_driver, core);
- const struct hda_codec_preset *preset;
-
- u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
- for (preset = driver->preset; preset->id; preset++) {
- if (preset->id == id &&
- (!preset->rev || preset->rev == codec->core.revision_id)) {
- codec->preset = preset;
- return 1;
- }
- }
- return 0;
- }
- static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
- {
- struct hda_codec *codec = container_of(dev, struct hda_codec, core);
- if (codec->patch_ops.unsol_event)
- codec->patch_ops.unsol_event(codec, ev);
- }
- static int codec_refresh_name(struct hda_codec *codec, const char *name)
- {
- if (name) {
- kfree(codec->core.chip_name);
- codec->core.chip_name = kstrdup(name, GFP_KERNEL);
- }
- return codec->core.chip_name ? 0 : -ENOMEM;
- }
- static int hda_codec_driver_probe(struct device *dev)
- {
- struct hda_codec *codec = dev_to_hda_codec(dev);
- struct module *owner = dev->driver->owner;
- int err;
- if (WARN_ON(!codec->preset))
- return -EINVAL;
- err = codec_refresh_name(codec, codec->preset->name);
- if (err < 0)
- goto error;
- err = snd_hdac_regmap_init(&codec->core);
- if (err < 0)
- goto error;
- if (!try_module_get(owner)) {
- err = -EINVAL;
- goto error;
- }
- err = codec->preset->patch(codec);
- if (err < 0)
- goto error_module;
- err = snd_hda_codec_build_pcms(codec);
- if (err < 0)
- goto error_module;
- err = snd_hda_codec_build_controls(codec);
- if (err < 0)
- goto error_module;
- if (codec->card->registered) {
- err = snd_card_register(codec->card);
- if (err < 0)
- goto error_module;
- snd_hda_codec_register(codec);
- }
- codec->core.lazy_cache = true;
- return 0;
- error_module:
- module_put(owner);
- error:
- snd_hda_codec_cleanup_for_unbind(codec);
- return err;
- }
- static int hda_codec_driver_remove(struct device *dev)
- {
- struct hda_codec *codec = dev_to_hda_codec(dev);
- if (codec->patch_ops.free)
- codec->patch_ops.free(codec);
- snd_hda_codec_cleanup_for_unbind(codec);
- module_put(dev->driver->owner);
- return 0;
- }
- static void hda_codec_driver_shutdown(struct device *dev)
- {
- struct hda_codec *codec = dev_to_hda_codec(dev);
- if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
- codec->patch_ops.reboot_notify(codec);
- }
- int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
- struct module *owner)
- {
- drv->core.driver.name = name;
- drv->core.driver.owner = owner;
- drv->core.driver.bus = &snd_hda_bus_type;
- drv->core.driver.probe = hda_codec_driver_probe;
- drv->core.driver.remove = hda_codec_driver_remove;
- drv->core.driver.shutdown = hda_codec_driver_shutdown;
- drv->core.driver.pm = &hda_codec_driver_pm;
- drv->core.type = HDA_DEV_LEGACY;
- drv->core.match = hda_codec_match;
- drv->core.unsol_event = hda_codec_unsol_event;
- return driver_register(&drv->core.driver);
- }
- EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
- void hda_codec_driver_unregister(struct hda_codec_driver *drv)
- {
- driver_unregister(&drv->core.driver);
- }
- EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
- static inline bool codec_probed(struct hda_codec *codec)
- {
- return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
- }
- static void codec_bind_module(struct hda_codec *codec)
- {
- #ifdef MODULE
- request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
- if (codec_probed(codec))
- return;
- request_module("snd-hda-codec-id:%04x*",
- (codec->core.vendor_id >> 16) & 0xffff);
- if (codec_probed(codec))
- return;
- #endif
- }
- #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
- static bool is_likely_hdmi_codec(struct hda_codec *codec)
- {
- hda_nid_t nid;
- for_each_hda_codec_node(nid, codec) {
- unsigned int wcaps = get_wcaps(codec, nid);
- switch (get_wcaps_type(wcaps)) {
- case AC_WID_AUD_IN:
- return false;
- case AC_WID_AUD_OUT:
- if (!(wcaps & AC_WCAP_DIGITAL))
- return false;
- break;
- }
- }
- return true;
- }
- #else
- #define is_likely_hdmi_codec(codec) false
- #endif
- static int codec_bind_generic(struct hda_codec *codec)
- {
- if (codec->probe_id)
- return -ENODEV;
- if (is_likely_hdmi_codec(codec)) {
- codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
- #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
- request_module("snd-hda-codec-hdmi");
- #endif
- if (codec_probed(codec))
- return 0;
- }
- codec->probe_id = HDA_CODEC_ID_GENERIC;
- #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
- request_module("snd-hda-codec-generic");
- #endif
- if (codec_probed(codec))
- return 0;
- return -ENODEV;
- }
- #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
- #define is_generic_config(codec) \
- (codec->modelname && !strcmp(codec->modelname, "generic"))
- #else
- #define is_generic_config(codec) 0
- #endif
- int snd_hda_codec_configure(struct hda_codec *codec)
- {
- int err;
- if (is_generic_config(codec))
- codec->probe_id = HDA_CODEC_ID_GENERIC;
- else
- codec->probe_id = 0;
- err = snd_hdac_device_register(&codec->core);
- if (err < 0)
- return err;
- if (!codec->preset)
- codec_bind_module(codec);
- if (!codec->preset) {
- err = codec_bind_generic(codec);
- if (err < 0) {
- codec_err(codec, "Unable to bind the codec\n");
- goto error;
- }
- }
-
- if (codec->core.afg || !*codec->card->mixername)
- snprintf(codec->card->mixername,
- sizeof(codec->card->mixername), "%s %s",
- codec->core.vendor_name, codec->core.chip_name);
- return 0;
- error:
- snd_hdac_device_unregister(&codec->core);
- return err;
- }
- EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
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