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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /sound/aoa/soundbus/core.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/aoa/soundbus/core.c')
-rw-r--r-- | sound/aoa/soundbus/core.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c new file mode 100644 index 0000000000..39fb8fe4e6 --- /dev/null +++ b/sound/aoa/soundbus/core.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * soundbus + * + * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> + */ + +#include <linux/module.h> +#include "soundbus.h" + +MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Apple Soundbus"); + +struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev) +{ + struct device *tmp; + + if (!dev) + return NULL; + tmp = get_device(&dev->ofdev.dev); + if (tmp) + return to_soundbus_device(tmp); + else + return NULL; +} +EXPORT_SYMBOL_GPL(soundbus_dev_get); + +void soundbus_dev_put(struct soundbus_dev *dev) +{ + if (dev) + put_device(&dev->ofdev.dev); +} +EXPORT_SYMBOL_GPL(soundbus_dev_put); + +static int soundbus_probe(struct device *dev) +{ + int error = -ENODEV; + struct soundbus_driver *drv; + struct soundbus_dev *soundbus_dev; + + drv = to_soundbus_driver(dev->driver); + soundbus_dev = to_soundbus_device(dev); + + if (!drv->probe) + return error; + + soundbus_dev_get(soundbus_dev); + + error = drv->probe(soundbus_dev); + if (error) + soundbus_dev_put(soundbus_dev); + + return error; +} + + +static int soundbus_uevent(const struct device *dev, struct kobj_uevent_env *env) +{ + const struct soundbus_dev * soundbus_dev; + const struct platform_device * of; + const char *compat; + int retval = 0; + int cplen, seen = 0; + + if (!dev) + return -ENODEV; + + soundbus_dev = to_soundbus_device(dev); + if (!soundbus_dev) + return -ENODEV; + + of = &soundbus_dev->ofdev; + + /* stuff we want to pass to /sbin/hotplug */ + retval = add_uevent_var(env, "OF_NAME=%pOFn", of->dev.of_node); + if (retval) + return retval; + + retval = add_uevent_var(env, "OF_TYPE=%s", of_node_get_device_type(of->dev.of_node)); + if (retval) + return retval; + + /* Since the compatible field can contain pretty much anything + * it's not really legal to split it out with commas. We split it + * up using a number of environment variables instead. */ + + compat = of_get_property(of->dev.of_node, "compatible", &cplen); + while (compat && cplen > 0) { + int tmp = env->buflen; + retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat); + if (retval) + return retval; + compat += env->buflen - tmp; + cplen -= env->buflen - tmp; + seen += 1; + } + + retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); + if (retval) + return retval; + retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias); + + return retval; +} + +static void soundbus_device_remove(struct device *dev) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->remove) + drv->remove(soundbus_dev); + soundbus_dev_put(soundbus_dev); +} + +static void soundbus_device_shutdown(struct device *dev) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->shutdown) + drv->shutdown(soundbus_dev); +} + +/* soundbus_dev_attrs is declared in sysfs.c */ +ATTRIBUTE_GROUPS(soundbus_dev); +static struct bus_type soundbus_bus_type = { + .name = "aoa-soundbus", + .probe = soundbus_probe, + .uevent = soundbus_uevent, + .remove = soundbus_device_remove, + .shutdown = soundbus_device_shutdown, + .dev_groups = soundbus_dev_groups, +}; + +int soundbus_add_one(struct soundbus_dev *dev) +{ + static int devcount; + + /* sanity checks */ + if (!dev->attach_codec || + !dev->ofdev.dev.of_node || + dev->pcmname || + dev->pcmid != -1) { + printk(KERN_ERR "soundbus: adding device failed sanity check!\n"); + return -EINVAL; + } + + dev_set_name(&dev->ofdev.dev, "soundbus:%x", ++devcount); + dev->ofdev.dev.bus = &soundbus_bus_type; + return of_device_register(&dev->ofdev); +} +EXPORT_SYMBOL_GPL(soundbus_add_one); + +void soundbus_remove_one(struct soundbus_dev *dev) +{ + of_device_unregister(&dev->ofdev); +} +EXPORT_SYMBOL_GPL(soundbus_remove_one); + +int soundbus_register_driver(struct soundbus_driver *drv) +{ + /* initialize common driver fields */ + drv->driver.name = drv->name; + drv->driver.bus = &soundbus_bus_type; + + /* register with core */ + return driver_register(&drv->driver); +} +EXPORT_SYMBOL_GPL(soundbus_register_driver); + +void soundbus_unregister_driver(struct soundbus_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(soundbus_unregister_driver); + +static int __init soundbus_init(void) +{ + return bus_register(&soundbus_bus_type); +} + +static void __exit soundbus_exit(void) +{ + bus_unregister(&soundbus_bus_type); +} + +subsys_initcall(soundbus_init); +module_exit(soundbus_exit); |