[alsa-devel] [PATCH 17/21] ASoC: SOF: Add ACPI device support

[Pierre-Louis Bossart]

From: Liam Girdwood <liam.r.girdwood at linux.intel.com>

Add support ACPI based SOF DSP devices.

Signed-off-by: Liam Girdwood <liam.r.girdwood at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/sof-acpi-dev.c | 269 +++++++++++++++++++++++++++++++++++
 1 file changed, 269 insertions(+)
 create mode 100644 sound/soc/sof/sof-acpi-dev.c

diff --git a/sound/soc/sof/sof-acpi-dev.c b/sound/soc/sof/sof-acpi-dev.c
new file mode 100644
index 000000000000..52de8ac8ede0
--- /dev/null
+++ b/sound/soc/sof/sof-acpi-dev.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation. All rights reserved.
+//
+// Author: Liam Girdwood <liam.r.girdwood at linux.intel.com>
+//
+
+#include <asm/iosf_mbi.h>
+#include <linux/acpi.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc-acpi.h>
+#include <sound/soc-acpi-intel-match.h>
+#include <sound/sof.h>
+
+#include "ops.h"
+
+/* platform specific devices */
+#include "intel/shim.h"
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HASWELL)
+static struct sof_dev_desc sof_acpi_haswell_desc = {
+	.machines = snd_soc_acpi_intel_haswell_machines,
+	.resindex_lpe_base = 0,
+	.resindex_pcicfg_base = 1,
+	.resindex_imr_base = -1,
+	.irqindex_host_ipc = 0,
+	.nocodec_fw_filename = "intel/sof-hsw.ri",
+	.nocodec_tplg_filename = "intel/sof-hsw-nocodec.tplg"
+};
+#endif
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
+static struct sof_dev_desc sof_acpi_broadwell_desc = {
+	.machines = snd_soc_acpi_intel_broadwell_machines,
+	.resindex_lpe_base = 0,
+	.resindex_pcicfg_base = 1,
+	.resindex_imr_base = -1,
+	.irqindex_host_ipc = 0,
+	.nocodec_fw_filename = "intel/sof-bdw.ri",
+	.nocodec_tplg_filename = "intel/sof-bdw-nocodec.tplg"
+};
+#endif
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
+
+/* BYTCR uses different IRQ index */
+static struct sof_dev_desc sof_acpi_baytrailcr_desc = {
+	.machines = snd_soc_acpi_intel_baytrail_machines,
+	.resindex_lpe_base = 0,
+	.resindex_pcicfg_base = 1,
+	.resindex_imr_base = 2,
+	.irqindex_host_ipc = 0,
+	.nocodec_fw_filename = "intel/sof-byt.ri",
+	.nocodec_tplg_filename = "intel/sof-byt-nocodec.tplg"
+};
+
+static struct sof_dev_desc sof_acpi_baytrail_desc = {
+	.machines = snd_soc_acpi_intel_baytrail_machines,
+	.resindex_lpe_base = 0,
+	.resindex_pcicfg_base = 1,
+	.resindex_imr_base = 2,
+	.irqindex_host_ipc = 5,
+	.nocodec_fw_filename = "intel/sof-byt.ri",
+	.nocodec_tplg_filename = "intel/sof-byt-nocodec.tplg"
+};
+
+static int is_byt_cr(struct device *dev)
+{
+	u32 bios_status;
+	int status;
+
+	if (!IS_ENABLED(CONFIG_IOSF_MBI) || !iosf_mbi_available()) {
+		dev_info(dev, "IOSF_MBI not enabled - can't determine CPU variant\n");
+		return -EIO;
+	}
+
+	status = iosf_mbi_read(BT_MBI_UNIT_PMC, /* 0x04 PUNIT */
+			       MBI_REG_READ, /* 0x10 */
+			       0x006, /* BIOS_CONFIG */
+			       &bios_status);
+
+	if (status) {
+		dev_err(dev, "error: could not read PUNIT BIOS_CONFIG\n");
+		return -EIO;
+	}
+
+	/* bits 26:27 mirror PMIC options */
+	bios_status = (bios_status >> 26) & 3;
+
+	if (bios_status == 1 || bios_status == 3) {
+		dev_info(dev, "BYT-CR detected\n");
+		return 1;
+	}
+
+	dev_info(dev, "BYT-CR not detected\n");
+	return 0;
+}
+
+static struct sof_dev_desc sof_acpi_cherrytrail_desc = {
+	.machines = snd_soc_acpi_intel_cherrytrail_machines,
+	.resindex_lpe_base = 0,
+	.resindex_pcicfg_base = 1,
+	.resindex_imr_base = 2,
+	.irqindex_host_ipc = 5,
+	.nocodec_fw_filename = "intel/sof-cht.ri",
+	.nocodec_tplg_filename = "intel/sof-cht-nocodec.tplg"
+};
+
+#endif
+
+static const struct dev_pm_ops sof_acpi_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
+	SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
+			   NULL)
+	.suspend_late = snd_sof_suspend_late,
+};
+
+static const struct sof_ops_table acpi_mach_ops[] = {
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HASWELL)
+	{&sof_acpi_haswell_desc, &sof_hsw_ops},
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
+	{&sof_acpi_broadwell_desc, &sof_bdw_ops},
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
+	{&sof_acpi_baytrail_desc, &sof_byt_ops},
+	{&sof_acpi_baytrailcr_desc, &sof_byt_ops},
+	{&sof_acpi_cherrytrail_desc, &sof_cht_ops},
+#endif
+};
+
+static int sof_acpi_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct sof_dev_desc *desc;
+	struct snd_soc_acpi_mach *mach;
+	struct snd_sof_pdata *sof_pdata;
+	struct sof_platform_priv *priv;
+	struct snd_sof_dsp_ops *ops;
+	int ret = 0;
+
+	dev_dbg(&pdev->dev, "ACPI DSP detected");
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
+	if (!sof_pdata)
+		return -ENOMEM;
+
+	desc = (const struct sof_dev_desc *)device_get_match_data(dev);
+	if (!desc)
+		return -ENODEV;
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
+	if (desc == &sof_acpi_baytrail_desc && is_byt_cr(dev))
+		desc = &sof_acpi_baytrailcr_desc;
+#endif
+
+	/* get ops for platform */
+	ops = sof_get_ops(desc, acpi_mach_ops, ARRAY_SIZE(acpi_mach_ops));
+	if (!ops) {
+		dev_err(dev, "error: no matching ACPI descriptor ops\n");
+		return -ENODEV;
+	}
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
+	/* force nocodec mode */
+	dev_warn(dev, "Force to use nocodec mode\n");
+	mach = devm_kzalloc(dev, sizeof(*mach), GFP_KERNEL);
+	if (!mach)
+		return -ENOMEM;
+	ret = sof_nocodec_setup(dev, sof_pdata, mach, desc, ops);
+	if (ret < 0)
+		return ret;
+#else
+	/* find machine */
+	mach = snd_soc_acpi_find_machine(desc->machines);
+	if (!mach) {
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)
+		/* fallback to nocodec mode */
+		dev_warn(dev, "No matching ASoC machine driver found - using nocodec\n");
+		mach = devm_kzalloc(dev, sizeof(*mach), GFP_KERNEL);
+		ret = sof_nocodec_setup(dev, sof_pdata, mach, desc, ops);
+		if (ret < 0)
+			return ret;
+#else
+		dev_err(dev, "error: no matching ASoC machine driver found - aborting probe\n");
+		return -ENODEV;
+#endif
+	}
+#endif
+
+	mach->pdata = ops;
+	sof_pdata->machine = mach;
+	sof_pdata->desc = desc;
+	priv->sof_pdata = sof_pdata;
+	sof_pdata->dev = &pdev->dev;
+	sof_pdata->type = SOF_DEVICE_APCI;
+	sof_pdata->platform = "sof-audio";
+	dev_set_drvdata(&pdev->dev, priv);
+
+	/* register sof-audio platform driver */
+	ret = sof_create_platform_device(priv);
+	if (ret) {
+		dev_err(dev, "error: failed to create platform device!\n");
+		return ret;
+	}
+
+	/* allow runtime_pm */
+	pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_allow(dev);
+
+	return ret;
+}
+
+static void sof_acpi_shutdown(struct platform_device *pdev)
+{
+	snd_sof_shutdown(&pdev->dev);
+}
+
+static int sof_acpi_remove(struct platform_device *pdev)
+{
+	struct sof_platform_priv *priv = dev_get_drvdata(&pdev->dev);
+	struct snd_sof_pdata *sof_pdata = priv->sof_pdata;
+
+	if (!IS_ERR(priv->pdev_pcm))
+		platform_device_unregister(priv->pdev_pcm);
+	release_firmware(sof_pdata->fw);
+
+	return 0;
+}
+
+static const struct acpi_device_id sof_acpi_match[] = {
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HASWELL)
+	{ "INT33C8", (unsigned long)&sof_acpi_haswell_desc },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
+	{ "INT3438", (unsigned long)&sof_acpi_broadwell_desc },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_BAYTRAIL)
+	{ "80860F28", (unsigned long)&sof_acpi_baytrail_desc },
+	{ "808622A8", (unsigned long)&sof_acpi_cherrytrail_desc },
+#endif
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, sof_acpi_match);
+
+/* acpi_driver definition */
+static struct platform_driver snd_sof_acpi_driver = {
+	.probe = sof_acpi_probe,
+	.remove = sof_acpi_remove,
+	.shutdown = sof_acpi_shutdown,
+	.driver = {
+		.name = "sof-audio-acpi",
+		.pm = &sof_acpi_pm,
+		.acpi_match_table = ACPI_PTR(sof_acpi_match),
+	},
+};
+module_platform_driver(snd_sof_acpi_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.17.1