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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/qcom/storm.c
parentInitial commit. (diff)
downloadlinux-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/soc/qcom/storm.c')
-rw-r--r--sound/soc/qcom/storm.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/sound/soc/qcom/storm.c b/sound/soc/qcom/storm.c
new file mode 100644
index 0000000000..80c9cf2f25
--- /dev/null
+++ b/sound/soc/qcom/storm.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
+ *
+ * storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define STORM_SYSCLK_MULT 4
+
+static int storm_ops_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = soc_runtime->card;
+ snd_pcm_format_t format = params_format(params);
+ unsigned int rate = params_rate(params);
+ unsigned int sysclk_freq;
+ int bitwidth, ret;
+
+ bitwidth = snd_pcm_format_width(format);
+ if (bitwidth < 0) {
+ dev_err(card->dev, "invalid bit width given: %d\n", bitwidth);
+ return bitwidth;
+ }
+
+ /*
+ * as the CPU DAI is the I2S bus master and no system clock is needed by
+ * the MAX98357a DAC, simply set the system clock to be a constant
+ * multiple of the bit clock for the clock divider
+ */
+ sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT;
+
+ ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(soc_runtime, 0), 0, sysclk_freq, 0);
+ if (ret) {
+ dev_err(card->dev, "error setting sysclk to %u: %d\n",
+ sysclk_freq, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_ops storm_soc_ops = {
+ .hw_params = storm_ops_hw_params,
+};
+
+SND_SOC_DAILINK_DEFS(hifi,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link storm_dai_link = {
+ .name = "Primary",
+ .stream_name = "Primary",
+ .ops = &storm_soc_ops,
+ SND_SOC_DAILINK_REG(hifi),
+};
+
+static int storm_parse_of(struct snd_soc_card *card)
+{
+ struct snd_soc_dai_link *dai_link = card->dai_link;
+ struct device_node *np = card->dev->of_node;
+
+ dai_link->cpus->of_node = of_parse_phandle(np, "cpu", 0);
+ if (!dai_link->cpus->of_node) {
+ dev_err(card->dev, "error getting cpu phandle\n");
+ return -EINVAL;
+ }
+ dai_link->platforms->of_node = dai_link->cpus->of_node;
+
+ dai_link->codecs->of_node = of_parse_phandle(np, "codec", 0);
+ if (!dai_link->codecs->of_node) {
+ dev_err(card->dev, "error getting codec phandle\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int storm_platform_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card;
+ int ret;
+
+ card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ card->dev = &pdev->dev;
+ card->owner = THIS_MODULE;
+
+ ret = snd_soc_of_parse_card_name(card, "qcom,model");
+ if (ret) {
+ dev_err(&pdev->dev, "error parsing card name: %d\n", ret);
+ return ret;
+ }
+
+ card->dai_link = &storm_dai_link;
+ card->num_links = 1;
+
+ ret = storm_parse_of(card);
+ if (ret) {
+ dev_err(&pdev->dev, "error resolving dai links: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
+ if (ret)
+ dev_err(&pdev->dev, "error registering soundcard: %d\n", ret);
+
+ return ret;
+
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id storm_device_id[] = {
+ { .compatible = "google,storm-audio" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, storm_device_id);
+#endif
+
+static struct platform_driver storm_platform_driver = {
+ .driver = {
+ .name = "storm-audio",
+ .of_match_table =
+ of_match_ptr(storm_device_id),
+ },
+ .probe = storm_platform_probe,
+};
+module_platform_driver(storm_platform_driver);
+
+MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver");
+MODULE_LICENSE("GPL v2");