diff options
Diffstat (limited to 'sound/virtio/virtio_jack.c')
| -rw-r--r-- | sound/virtio/virtio_jack.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/sound/virtio/virtio_jack.c b/sound/virtio/virtio_jack.c new file mode 100644 index 000000000..c69f1dcdc --- /dev/null +++ b/sound/virtio/virtio_jack.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * virtio-snd: Virtio sound device + * Copyright (C) 2021 OpenSynergy GmbH + */ +#include <linux/virtio_config.h> +#include <sound/jack.h> +#include <sound/hda_verbs.h> + +#include "virtio_card.h" + +/** + * DOC: Implementation Status + * + * At the moment jacks have a simple implementation and can only be used to + * receive notifications about a plugged in/out device. + * + * VIRTIO_SND_R_JACK_REMAP + * is not supported + */ + +/** + * struct virtio_jack - VirtIO jack. + * @jack: Kernel jack control. + * @nid: Functional group node identifier. + * @features: Jack virtio feature bit map (1 << VIRTIO_SND_JACK_F_XXX). + * @defconf: Pin default configuration value. + * @caps: Pin capabilities value. + * @connected: Current jack connection status. + * @type: Kernel jack type (SND_JACK_XXX). + */ +struct virtio_jack { + struct snd_jack *jack; + u32 nid; + u32 features; + u32 defconf; + u32 caps; + bool connected; + int type; +}; + +/** + * virtsnd_jack_get_label() - Get the name string for the jack. + * @vjack: VirtIO jack. + * + * Returns the jack name based on the default pin configuration value (see HDA + * specification). + * + * Context: Any context. + * Return: Name string. + */ +static const char *virtsnd_jack_get_label(struct virtio_jack *vjack) +{ + unsigned int defconf = vjack->defconf; + unsigned int device = + (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT; + unsigned int location = + (defconf & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT; + + switch (device) { + case AC_JACK_LINE_OUT: + return "Line Out"; + case AC_JACK_SPEAKER: + return "Speaker"; + case AC_JACK_HP_OUT: + return "Headphone"; + case AC_JACK_CD: + return "CD"; + case AC_JACK_SPDIF_OUT: + case AC_JACK_DIG_OTHER_OUT: + if (location == AC_JACK_LOC_HDMI) + return "HDMI Out"; + else + return "SPDIF Out"; + case AC_JACK_LINE_IN: + return "Line"; + case AC_JACK_AUX: + return "Aux"; + case AC_JACK_MIC_IN: + return "Mic"; + case AC_JACK_SPDIF_IN: + return "SPDIF In"; + case AC_JACK_DIG_OTHER_IN: + return "Digital In"; + default: + return "Misc"; + } +} + +/** + * virtsnd_jack_get_type() - Get the type for the jack. + * @vjack: VirtIO jack. + * + * Returns the jack type based on the default pin configuration value (see HDA + * specification). + * + * Context: Any context. + * Return: SND_JACK_XXX value. + */ +static int virtsnd_jack_get_type(struct virtio_jack *vjack) +{ + unsigned int defconf = vjack->defconf; + unsigned int device = + (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT; + + switch (device) { + case AC_JACK_LINE_OUT: + case AC_JACK_SPEAKER: + return SND_JACK_LINEOUT; + case AC_JACK_HP_OUT: + return SND_JACK_HEADPHONE; + case AC_JACK_SPDIF_OUT: + case AC_JACK_DIG_OTHER_OUT: + return SND_JACK_AVOUT; + case AC_JACK_MIC_IN: + return SND_JACK_MICROPHONE; + default: + return SND_JACK_LINEIN; + } +} + +/** + * virtsnd_jack_parse_cfg() - Parse the jack configuration. + * @snd: VirtIO sound device. + * + * This function is called during initial device initialization. + * + * Context: Any context that permits to sleep. + * Return: 0 on success, -errno on failure. + */ +int virtsnd_jack_parse_cfg(struct virtio_snd *snd) +{ + struct virtio_device *vdev = snd->vdev; + struct virtio_snd_jack_info *info; + u32 i; + int rc; + + virtio_cread_le(vdev, struct virtio_snd_config, jacks, &snd->njacks); + if (!snd->njacks) + return 0; + + snd->jacks = devm_kcalloc(&vdev->dev, snd->njacks, sizeof(*snd->jacks), + GFP_KERNEL); + if (!snd->jacks) + return -ENOMEM; + + info = kcalloc(snd->njacks, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_JACK_INFO, 0, snd->njacks, + sizeof(*info), info); + if (rc) + goto on_exit; + + for (i = 0; i < snd->njacks; ++i) { + struct virtio_jack *vjack = &snd->jacks[i]; + + vjack->nid = le32_to_cpu(info[i].hdr.hda_fn_nid); + vjack->features = le32_to_cpu(info[i].features); + vjack->defconf = le32_to_cpu(info[i].hda_reg_defconf); + vjack->caps = le32_to_cpu(info[i].hda_reg_caps); + vjack->connected = info[i].connected; + } + +on_exit: + kfree(info); + + return rc; +} + +/** + * virtsnd_jack_build_devs() - Build ALSA controls for jacks. + * @snd: VirtIO sound device. + * + * Context: Any context that permits to sleep. + * Return: 0 on success, -errno on failure. + */ +int virtsnd_jack_build_devs(struct virtio_snd *snd) +{ + u32 i; + int rc; + + for (i = 0; i < snd->njacks; ++i) { + struct virtio_jack *vjack = &snd->jacks[i]; + + vjack->type = virtsnd_jack_get_type(vjack); + + rc = snd_jack_new(snd->card, virtsnd_jack_get_label(vjack), + vjack->type, &vjack->jack, true, true); + if (rc) + return rc; + + if (vjack->jack) + vjack->jack->private_data = vjack; + + snd_jack_report(vjack->jack, + vjack->connected ? vjack->type : 0); + } + + return 0; +} + +/** + * virtsnd_jack_event() - Handle the jack event notification. + * @snd: VirtIO sound device. + * @event: VirtIO sound event. + * + * Context: Interrupt context. + */ +void virtsnd_jack_event(struct virtio_snd *snd, struct virtio_snd_event *event) +{ + u32 jack_id = le32_to_cpu(event->data); + struct virtio_jack *vjack; + + if (jack_id >= snd->njacks) + return; + + vjack = &snd->jacks[jack_id]; + + switch (le32_to_cpu(event->hdr.code)) { + case VIRTIO_SND_EVT_JACK_CONNECTED: + vjack->connected = true; + break; + case VIRTIO_SND_EVT_JACK_DISCONNECTED: + vjack->connected = false; + break; + default: + return; + } + + snd_jack_report(vjack->jack, vjack->connected ? vjack->type : 0); +} |