diff options
Diffstat (limited to 'sound/hda')
| -rw-r--r-- | sound/hda/Kconfig | 4 | ||||
| -rw-r--r-- | sound/hda/Makefile | 3 | ||||
| -rw-r--r-- | sound/hda/ext/Makefile | 3 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_bus.c | 117 |
4 files changed, 127 insertions, 0 deletions
diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig index ac5ffac2a272..6dc3914fd28b 100644 --- a/sound/hda/Kconfig +++ b/sound/hda/Kconfig @@ -10,3 +10,7 @@ config SND_HDA_I915 default y depends on DRM_I915 depends on SND_HDA_CORE + +config SND_HDA_EXT_CORE + tristate + select SND_HDA_CORE diff --git a/sound/hda/Makefile b/sound/hda/Makefile index 55dd465c7042..7e999c995cdc 100644 --- a/sound/hda/Makefile +++ b/sound/hda/Makefile @@ -8,3 +8,6 @@ CFLAGS_trace.o := -I$(src) snd-hda-core-$(CONFIG_SND_HDA_I915) += hdac_i915.o obj-$(CONFIG_SND_HDA_CORE) += snd-hda-core.o + +#extended hda +obj-$(CONFIG_SND_HDA_EXT_CORE) += ext/ diff --git a/sound/hda/ext/Makefile b/sound/hda/ext/Makefile new file mode 100644 index 000000000000..2e583e664916 --- /dev/null +++ b/sound/hda/ext/Makefile @@ -0,0 +1,3 @@ +snd-hda-ext-core-objs := hdac_ext_bus.o + +obj-$(CONFIG_SND_HDA_EXT_CORE) += snd-hda-ext-core.o diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c new file mode 100644 index 000000000000..f1100354c591 --- /dev/null +++ b/sound/hda/ext/hdac_ext_bus.c @@ -0,0 +1,117 @@ +/* + * hdac-ext-bus.c - HD-audio extended core bus functions. + * + * Copyright (C) 2014-2015 Intel Corp + * Author: Jeeja KP <jeeja.kp@intel.com> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <sound/hdaudio_ext.h> + +MODULE_DESCRIPTION("HDA extended core"); +MODULE_LICENSE("GPL v2"); + +/** + * snd_hdac_ext_bus_init - initialize a HD-audio extended bus + * @ebus: the pointer to extended bus object + * @dev: device pointer + * @ops: bus verb operators + * @io_ops: lowlevel I/O operators + * + * Returns 0 if successful, or a negative error code. + */ +int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev, + const struct hdac_bus_ops *ops, + const struct hdac_io_ops *io_ops) +{ + int ret; + static int idx; + + ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops); + if (ret < 0) + return ret; + + INIT_LIST_HEAD(&ebus->hlink_list); + ebus->idx = idx++; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init); + +/** + * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus + * @ebus: the pointer to extended bus object + */ +void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus) +{ + snd_hdac_bus_exit(&ebus->bus); + WARN_ON(!list_empty(&ebus->hlink_list)); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit); + +static void default_release(struct device *dev) +{ + snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev)); +} + +/** + * snd_hdac_ext_device_init - initialize the HDA extended codec base device + * @ebus: hdac extended bus to attach to + * @addr: codec address + * + * Returns zero for success or a negative error code. + */ +int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr) +{ + struct hdac_device *hdev = NULL; + struct hdac_bus *bus = ebus_to_hbus(ebus); + char name[15]; + int ret; + + hdev = kzalloc(sizeof(*hdev), GFP_KERNEL); + if (!hdev) + return -ENOMEM; + + snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr); + + ret = snd_hdac_device_init(hdev, bus, name, addr); + if (ret < 0) { + dev_err(bus->dev, "device init failed for hdac device\n"); + return ret; + } + hdev->type = HDA_DEV_ASOC; + hdev->dev.release = default_release; + + ret = snd_hdac_device_register(hdev); + if (ret) { + dev_err(bus->dev, "failed to register hdac device\n"); + snd_hdac_ext_bus_device_exit(hdev); + return ret; + } + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init); + +/** + * snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device + * @hdev: hdac device to clean up + */ +void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev) +{ + snd_hdac_device_exit(hdev); + kfree(hdev); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit); |