new file mode 100644
@@ -0,0 +1,10 @@
+config SND_SOC_APPLE_MACAUDIO
+ tristate "ASoC machine driver for Apple Silicon Macs"
+ depends on ARCH_APPLE || COMPILE_TEST
+ select SND_SOC_APPLE_MCA
+ select SND_SIMPLE_CARD_UTILS
+ select APPLE_ADMAC
+ select COMMON_CLK_APPLE_NCO
+ default ARCH_APPLE
+ help
+ This option enables an ASoC machine driver for Apple Silicon Macs.
new file mode 100644
@@ -0,0 +1,3 @@
+snd-soc-macaudio-objs := macaudio.o
+
+obj-$(CONFIG_SND_SOC_APPLE_MACAUDIO) += snd-soc-macaudio.o
new file mode 100644
@@ -0,0 +1,597 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ASoC machine driver for Apple Silicon Macs
+ *
+ * Copyright (C) The Asahi Linux Contributors
+ *
+ * Based on sound/soc/qcom/{sc7180.c|common.c}
+ *
+ * Copyright (c) 2018, Linaro Limited.
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/simple_card_utils.h>
+#include <sound/soc.h>
+#include <uapi/linux/input-event-codes.h>
+
+#define DRIVER_NAME "snd-soc-macaudio"
+
+struct macaudio_snd_data {
+ struct snd_soc_card card;
+ struct snd_soc_jack_pin pin;
+ struct snd_soc_jack jack;
+
+ struct macaudio_link_props {
+ unsigned int mclk_fs;
+ } *link_props;
+
+ const struct snd_pcm_chmap_elem *speaker_chmap;
+
+ unsigned int speaker_nchans_array[2];
+ struct snd_pcm_hw_constraint_list speaker_nchans_list;
+
+ struct list_head hidden_kcontrols;
+};
+
+static int macaudio_parse_of(struct macaudio_snd_data *ma, struct snd_soc_card *card)
+{
+ struct device_node *np;
+ struct device_node *codec = NULL;
+ struct device_node *cpu = NULL;
+ struct device *dev = card->dev;
+ struct snd_soc_dai_link *link;
+ struct macaudio_link_props *link_props;
+ int ret, num_links;
+ int i = 0;
+
+ ret = snd_soc_of_parse_card_name(card, "model");
+ if (ret) {
+ dev_err(dev, "Error parsing card name: %d\n", ret);
+ return ret;
+ }
+
+ ret = asoc_simple_parse_routing(card, NULL);
+ if (ret)
+ return ret;
+
+ /* Populate links */
+ num_links = of_get_available_child_count(dev->of_node);
+
+ /* Allocate the DAI link array */
+ card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
+ ma->link_props = devm_kcalloc(dev, num_links, sizeof(*ma->link_props), GFP_KERNEL);
+ if (!card->dai_link || !ma->link_props)
+ return -ENOMEM;
+
+ card->num_links = num_links;
+ link = card->dai_link;
+ link_props = ma->link_props;
+
+ for_each_available_child_of_node(dev->of_node, np) {
+ link->id = i++;
+
+ /* CPU side is bit and frame clock master, I2S with both clocks inverted */
+ link->dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_CBC_CFC |
+ SND_SOC_DAIFMT_GATED |
+ SND_SOC_DAIFMT_IB_IF;
+
+ ret = of_property_read_string(np, "link-name", &link->name);
+ if (ret) {
+ dev_err(card->dev, "Missing link name\n");
+ goto err_put_np;
+ }
+
+ cpu = of_get_child_by_name(np, "cpu");
+ codec = of_get_child_by_name(np, "codec");
+
+ if (!codec || !cpu) {
+ dev_err(dev, "Missing DAI specifications for '%s'\n", link->name);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(card->dev, "%s: codec dai not found: %d\n",
+ link->name, ret);
+ goto err;
+ }
+
+ ret = snd_soc_of_get_dai_link_cpus(dev, cpu, link);
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(card->dev, "%s: cpu dai not found: %d\n",
+ link->name, ret);
+ goto err;
+ }
+
+ link->num_platforms = 1;
+ link->platforms = devm_kzalloc(dev, sizeof(*link->platforms),
+ GFP_KERNEL);
+ if (!link->platforms) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ link->platforms->of_node = link->cpus->of_node;
+
+ of_property_read_u32(np, "mclk-fs", &link_props->mclk_fs);
+
+ link->stream_name = link->name;
+ link++;
+ link_props++;
+
+ of_node_put(cpu);
+ of_node_put(codec);
+ }
+
+ /*
+ * TODO: Not sure I shouldn't do something about the ->of_node component
+ * references I leave in dai_link (if successful here).
+ */
+
+ return 0;
+err:
+ of_node_put(cpu);
+ of_node_put(codec);
+err_put_np:
+ for (i = 0; i < num_links; i++) {
+ snd_soc_of_put_dai_link_codecs(&card->dai_link[i]);
+ snd_soc_of_put_dai_link_cpus(&card->dai_link[i]);
+ }
+ of_node_put(np);
+ return ret;
+}
+
+static int macaudio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(rtd->card);
+ struct macaudio_link_props *props = &ma->link_props[rtd->num];
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct snd_soc_dai *dai;
+ int i, mclk;
+
+ if (props->mclk_fs) {
+ mclk = params_rate(params) * props->mclk_fs;
+
+ for_each_rtd_codec_dais(rtd, i, dai)
+ snd_soc_dai_set_sysclk(dai, 0, mclk, SND_SOC_CLOCK_IN);
+
+ snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT);
+ }
+
+ return 0;
+}
+
+static void macaudio_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(rtd->card);
+ struct macaudio_link_props *props = &ma->link_props[rtd->num];
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct snd_soc_dai *dai;
+ int i;
+
+ if (props->mclk_fs) {
+ for_each_rtd_codec_dais(rtd, i, dai)
+ snd_soc_dai_set_sysclk(dai, 0, 0, SND_SOC_CLOCK_IN);
+
+ snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
+ }
+}
+
+static bool macaudio_is_speakers(struct snd_soc_dai_link *dai_link)
+{
+ return !strcmp(rtd->dai_link->name, "Speaker")
+ || !strcmp(rtd->dai_link->name, "Speakers");
+}
+
+static int macaudio_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+ struct snd_pcm_hw_constraint_list *nchans_list = &ma->speaker_nchans_list;
+ unsigned int *nchans_array = ma->speaker_nchans_array;
+ int ret;
+
+ if (macaudio_is_speakers(rtd->dai_link)) {
+ if (rtd->num_codecs > 2) {
+ nchans_list->count = 2;
+ nchans_list->list = nchans_array;
+ nchans_array[0] = 2;
+ nchans_array[1] = rtd->num_codecs;
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS, nchans_list);
+ if (ret < 0)
+ return ret;
+ } else if (rtd->num_codecs == 2) {
+ ret = snd_pcm_hw_constraint_single(substream->runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int macaudio_assign_tdm(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *dai, *cpu_dai;
+ int ret, i;
+ int nchans = 0, nslots = 0, slot_width = 32;
+
+ nslots = rtd->num_codecs;
+
+ for_each_rtd_codec_dais(rtd, i, dai) {
+ int codec_nchans = 1;
+ int mask = ((1 << codec_nchans) - 1) << nchans;
+
+ ret = snd_soc_dai_set_tdm_slot(dai, mask,
+ mask, nslots, slot_width);
+ if (ret == -EINVAL)
+ /* Try without the RX mask */
+ ret = snd_soc_dai_set_tdm_slot(dai, mask,
+ 0, nslots, slot_width);
+
+ if (ret < 0) {
+ dev_err(card->dev, "DAI %s refuses TDM settings: %d",
+ dai->name, ret);
+ return ret;
+ }
+
+ nchans += codec_nchans;
+ }
+
+ cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, (1 << nslots) - 1,
+ (1 << nslots) - 1, nslots, slot_width);
+ if (ret < 0) {
+ dev_err(card->dev, "CPU DAI %s refuses TDM settings: %d",
+ cpu_dai->name, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int macaudio_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+ struct snd_soc_component *component;
+ int ret, i;
+
+ if (rtd->num_codecs > 1) {
+ ret = macaudio_assign_tdm(rtd);
+ if (ret < 0)
+ return ret;
+ }
+
+ for_each_rtd_components(rtd, i, component)
+ snd_soc_component_set_jack(component, &ma->jack, NULL);
+
+ return 0;
+}
+
+static void macaudio_exit(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_component *component;
+ int i;
+
+ for_each_rtd_components(rtd, i, component)
+ snd_soc_component_set_jack(component, NULL, NULL);
+}
+
+struct macaudio_kctlfix {
+ char *name;
+ char *value;
+} macaudio_kctlfixes[] = {
+ {"* ASI1 Sel", "Left"},
+ {"* ISENSE Switch", "Off"},
+ {"* VSENSE Switch", "Off"},
+ { }
+};
+
+static bool macaudio_kctlfix_matches(const char *pattern, const char *name)
+{
+ if (pattern[0] == '*') {
+ int namelen, patternlen;
+
+ pattern++;
+ if (pattern[0] == ' ')
+ pattern++;
+
+ namelen = strlen(name);
+ patternlen = strlen(pattern);
+
+ if (namelen > patternlen)
+ name += (namelen - patternlen);
+ }
+
+ return !strcmp(name, pattern);
+}
+
+static struct macaudio_kctlfix *macaudio_find_kctlfix(const char *name)
+{
+ struct macaudio_kctlfix *fctl;
+
+ for (fctl = macaudio_kctlfixes; fctl->name != NULL; fctl++)
+ if (macaudio_kctlfix_matches(fctl->name, name))
+ return fctl;
+
+ return NULL;
+}
+
+static int macaudio_probe(struct snd_soc_card *card)
+{
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ INIT_LIST_HEAD(&ma->hidden_kcontrols);
+
+ ma->pin.pin = "Headphones";
+ ma->pin.mask = SND_JACK_HEADSET | SND_JACK_HEADPHONE;
+ ret = snd_soc_card_jack_new(card, ma->pin.pin,
+ SND_JACK_HEADSET |
+ SND_JACK_HEADPHONE |
+ SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+ SND_JACK_BTN_2 | SND_JACK_BTN_3,
+ &ma->jack, &ma->pin, 1);
+
+ if (ret < 0)
+ dev_err(card->dev, "jack creation failed: %d\n", ret);
+
+ return ret;
+}
+
+/*
+ * Maybe this could be a general ASoC function?
+ */
+static void snd_soc_kcontrol_set_strval(struct snd_soc_card *card,
+ struct snd_kcontrol *kcontrol, const char *strvalue)
+{
+ struct snd_ctl_elem_value value;
+ struct snd_ctl_elem_info info;
+ int sel, i, ret;
+
+ ret = kcontrol->info(kcontrol, &info);
+ if (ret < 0) {
+ dev_err(card->dev, "can't obtain info on control '%s': %d",
+ kcontrol->id.name, ret);
+ return;
+ }
+
+ switch (info.type) {
+ case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
+ for (sel = 0; sel < info.value.enumerated.items; sel++) {
+ info.value.enumerated.item = sel;
+ kcontrol->info(kcontrol, &info);
+
+ if (!strcmp(strvalue, info.value.enumerated.name))
+ break;
+ }
+
+ if (sel == info.value.enumerated.items)
+ goto not_avail;
+
+ for (i = 0; i < info.count; i++)
+ value.value.enumerated.item[i] = sel;
+ break;
+
+ case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
+ sel = !strcmp(strvalue, "On");
+
+ if (!sel && strcmp(strvalue, "Off"))
+ goto not_avail;
+
+ for (i = 0; i < info.count; i++)
+ value.value.integer.value[i] = sel;
+ break;
+
+ case SNDRV_CTL_ELEM_TYPE_INTEGER:
+ if (kstrtoint(strvalue, 10, &sel))
+ goto not_avail;
+
+ for (i = 0; i < info.count; i++)
+ value.value.integer.value[i] = sel;
+ break;
+
+ default:
+ dev_err(card->dev, "%s: control '%s' has unsupported type %d",
+ __func__, kcontrol->id.name, info.type);
+ return;
+ }
+
+ ret = kcontrol->put(kcontrol, &value);
+ if (ret < 0) {
+ dev_err(card->dev, "can't set control '%s' to '%s': %d",
+ kcontrol->id.name, strvalue, ret);
+ return;
+ }
+
+ dev_dbg(card->dev, "set '%s' to '%s'",
+ kcontrol->id.name, strvalue);
+ return;
+
+not_avail:
+ dev_err(card->dev, "option '%s' on control '%s' not available",
+ strvalue, kcontrol->id.name);
+ return;
+
+}
+
+static int macaudio_filter_controls(struct snd_soc_card *card,
+ struct snd_kcontrol *kcontrol)
+{
+ struct macaudio_kctlfix *fctl = macaudio_find_kctlfix(kcontrol->id.name);
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+
+ dev_dbg(card->dev, "visiting control %s, have match %d\n",
+ kcontrol->id.name, !!fctl);
+
+ if (!fctl)
+ return 0;
+
+ list_add_tail(&kcontrol->list, &ma->hidden_kcontrols);
+ return 1;
+}
+
+static int macaudio_late_probe(struct snd_soc_card *card)
+{
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+ struct snd_kcontrol *kcontrol;
+ struct snd_soc_pcm_runtime *rtd;
+ int ret;
+
+ /*
+ * Here we take it to be okay to fiddle with the kcontrols
+ * we caught for ourselves.
+ */
+ list_for_each_entry(kcontrol, &ma->hidden_kcontrols, list) {
+ struct macaudio_kctlfix *fctl = macaudio_find_kctlfix(kcontrol->id.name);
+
+ if (fctl)
+ snd_soc_kcontrol_set_strval(card, kcontrol, fctl->value);
+ }
+
+ for_each_card_rtds(card, rtd) {
+ if (macaudio_is_speakers(rtd->dai_link) && ma->speaker_chmap) {
+ ret = snd_pcm_add_chmap_ctls(rtd->pcm,
+ SNDRV_PCM_STREAM_PLAYBACK, ma->speaker_chmap,
+ rtd->num_codecs, 0, NULL);
+ if (ret < 0)
+ dev_err(card->dev, "failed to add channel map on '%s': %d\n",
+ rtd->dai_link->name, ret);
+ }
+ }
+
+ return 0;
+}
+
+static int macaudio_remove(struct snd_soc_card *card)
+{
+ struct macaudio_snd_data *ma = snd_soc_card_get_drvdata(card);
+ struct snd_kcontrol *kcontrol;
+
+ list_for_each_entry(kcontrol, &ma->hidden_kcontrols, list)
+ snd_ctl_free_one(kcontrol);
+
+ return 0;
+}
+
+static const struct snd_soc_ops macaudio_ops = {
+ .startup = macaudio_startup,
+ .shutdown = macaudio_shutdown,
+ .hw_params = macaudio_hw_params,
+};
+
+static const struct snd_soc_dapm_widget macaudio_snd_widgets[] = {
+ SND_SOC_DAPM_HP("Headphones", NULL),
+};
+
+static const struct snd_pcm_chmap_elem macaudio_j274_chmaps[] = {
+ { .channels = 1,
+ .map = { SNDRV_CHMAP_MONO } },
+ { }
+};
+
+static const struct snd_pcm_chmap_elem macaudio_j293_chmaps[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 4,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
+ SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { }
+};
+
+static const struct snd_pcm_chmap_elem macaudio_j314_chmaps[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 6,
+ .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR,
+ SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
+ SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { }
+};
+
+static const struct of_device_id macaudio_snd_device_id[] = {
+ { .compatible = "apple,j274-macaudio", .data = macaudio_j274_chmaps },
+ { .compatible = "apple,j293-macaudio", .data = macaudio_j293_chmaps },
+ { .compatible = "apple,j314-macaudio", .data = macaudio_j314_chmaps },
+ { .compatible = "apple,macaudio", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, macaudio_snd_device_id);
+
+static int macaudio_snd_platform_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card;
+ struct macaudio_snd_data *data;
+ struct device *dev = &pdev->dev;
+ struct snd_soc_dai_link *link;
+ const struct of_device_id *of_id;
+ int ret;
+ int i;
+
+ of_id = of_match_device(macaudio_snd_device_id, dev);
+ if (!of_id)
+ return -EINVAL;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->speaker_chmap = of_id->data;
+ card = &data->card;
+ snd_soc_card_set_drvdata(card, data);
+
+ card->owner = THIS_MODULE;
+ card->driver_name = DRIVER_NAME;
+ card->dev = dev;
+ card->dapm_widgets = macaudio_snd_widgets;
+ card->num_dapm_widgets = ARRAY_SIZE(macaudio_snd_widgets);
+ card->probe = macaudio_probe;
+ card->late_probe = macaudio_late_probe;
+ card->remove = macaudio_remove;
+ card->filter_controls = macaudio_filter_controls;
+ card->remove = macaudio_remove;
+
+ ret = macaudio_parse_of(data, card);
+ if (ret)
+ return ret;
+
+ for_each_card_prelinks(card, i, link) {
+ link->ops = &macaudio_ops;
+ link->init = macaudio_init;
+ link->exit = macaudio_exit;
+ }
+
+ return devm_snd_soc_register_card(dev, card);
+}
+
+static struct platform_driver macaudio_snd_driver = {
+ .probe = macaudio_snd_platform_probe,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = macaudio_snd_device_id,
+ .pm = &snd_soc_pm_ops,
+ },
+};
+module_platform_driver(macaudio_snd_driver);
+
+MODULE_AUTHOR("Martin Povišer <povik+lin@cutebit.org>");
+MODULE_DESCRIPTION("Apple Silicon Macs machine-level sound driver");
+MODULE_LICENSE("GPL");
Add ASoC machine driver for Apple Silicon Macs. Signed-off-by: Martin Povišer <povik+lin@cutebit.org> --- sound/soc/apple/Kconfig | 10 + sound/soc/apple/Makefile | 3 + sound/soc/apple/macaudio.c | 597 +++++++++++++++++++++++++++++++++++++ 3 files changed, 610 insertions(+) create mode 100644 sound/soc/apple/Kconfig create mode 100644 sound/soc/apple/Makefile create mode 100644 sound/soc/apple/macaudio.c