Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1189 insertions, 0 deletions

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
new file mode 100644
index 0000000000..77408a981b
--- /dev/null
+++ b/sound/soc/intel/skylake/skl.c
@@ -0,0 +1,1189 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  skl.c - Implementation of ASoC Intel SKL HD Audio driver
+ *
+ *  Copyright (C) 2014-2015 Intel Corp
+ *  Author: Jeeja KP <jeeja.kp@intel.com>
+ *
+ *  Derived mostly from Intel HDA driver with following copyrights:
+ *  Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
+ *                     PeiSen Hou <pshou@realtek.com.tw>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <sound/pcm.h>
+#include <sound/soc-acpi.h>
+#include <sound/soc-acpi-intel-match.h>
+#include <sound/hda_register.h>
+#include <sound/hdaudio.h>
+#include <sound/hda_i915.h>
+#include <sound/hda_codec.h>
+#include <sound/intel-nhlt.h>
+#include <sound/intel-dsp-config.h>
+#include "skl.h"
+#include "skl-sst-dsp.h"
+#include "skl-sst-ipc.h"
+
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+#include "../../../soc/codecs/hdac_hda.h"
+#endif
+static int skl_pci_binding;
+module_param_named(pci_binding, skl_pci_binding, int, 0444);
+MODULE_PARM_DESC(pci_binding, "PCI binding (0=auto, 1=only legacy, 2=only asoc");
+
+/*
+ * initialize the PCI registers
+ */
+static void skl_update_pci_byte(struct pci_dev *pci, unsigned int reg,
+			    unsigned char mask, unsigned char val)
+{
+	unsigned char data;
+
+	pci_read_config_byte(pci, reg, &data);
+	data &= ~mask;
+	data |= (val & mask);
+	pci_write_config_byte(pci, reg, data);
+}
+
+static void skl_init_pci(struct skl_dev *skl)
+{
+	struct hdac_bus *bus = skl_to_bus(skl);
+
+	/*
+	 * Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
+	 * TCSEL == Traffic Class Select Register, which sets PCI express QOS
+	 * Ensuring these bits are 0 clears playback static on some HD Audio
+	 * codecs.
+	 * The PCI register TCSEL is defined in the Intel manuals.
+	 */
+	dev_dbg(bus->dev, "Clearing TCSEL\n");
+	skl_update_pci_byte(skl->pci, AZX_PCIREG_TCSEL, 0x07, 0);
+}
+
+static void update_pci_dword(struct pci_dev *pci,
+			unsigned int reg, u32 mask, u32 val)
+{
+	u32 data = 0;
+
+	pci_read_config_dword(pci, reg, &data);
+	data &= ~mask;
+	data |= (val & mask);
+	pci_write_config_dword(pci, reg, data);
+}
+
+/*
+ * skl_enable_miscbdcge - enable/dsiable CGCTL.MISCBDCGE bits
+ *
+ * @dev: device pointer
+ * @enable: enable/disable flag
+ */
+static void skl_enable_miscbdcge(struct device *dev, bool enable)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	u32 val;
+
+	val = enable ? AZX_CGCTL_MISCBDCGE_MASK : 0;
+
+	update_pci_dword(pci, AZX_PCIREG_CGCTL, AZX_CGCTL_MISCBDCGE_MASK, val);
+}
+
+/**
+ * skl_clock_power_gating: Enable/Disable clock and power gating
+ *
+ * @dev: Device pointer
+ * @enable: Enable/Disable flag
+ */
+static void skl_clock_power_gating(struct device *dev, bool enable)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	u32 val;
+
+	/* Update PDCGE bit of CGCTL register */
+	val = enable ? AZX_CGCTL_ADSPDCGE : 0;
+	update_pci_dword(pci, AZX_PCIREG_CGCTL, AZX_CGCTL_ADSPDCGE, val);
+
+	/* Update L1SEN bit of EM2 register */
+	val = enable ? AZX_REG_VS_EM2_L1SEN : 0;
+	snd_hdac_chip_updatel(bus, VS_EM2, AZX_REG_VS_EM2_L1SEN, val);
+
+	/* Update ADSPPGD bit of PGCTL register */
+	val = enable ? 0 : AZX_PGCTL_ADSPPGD;
+	update_pci_dword(pci, AZX_PCIREG_PGCTL, AZX_PGCTL_ADSPPGD, val);
+}
+
+/*
+ * While performing reset, controller may not come back properly causing
+ * issues, so recommendation is to set CGCTL.MISCBDCGE to 0 then do reset
+ * (init chip) and then again set CGCTL.MISCBDCGE to 1
+ */
+static int skl_init_chip(struct hdac_bus *bus, bool full_reset)
+{
+	struct hdac_ext_link *hlink;
+	int ret;
+
+	snd_hdac_set_codec_wakeup(bus, true);
+	skl_enable_miscbdcge(bus->dev, false);
+	ret = snd_hdac_bus_init_chip(bus, full_reset);
+
+	/* Reset stream-to-link mapping */
+	list_for_each_entry(hlink, &bus->hlink_list, list)
+		writel(0, hlink->ml_addr + AZX_REG_ML_LOSIDV);
+
+	skl_enable_miscbdcge(bus->dev, true);
+	snd_hdac_set_codec_wakeup(bus, false);
+
+	return ret;
+}
+
+void skl_update_d0i3c(struct device *dev, bool enable)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	u8 reg;
+	int timeout = 50;
+
+	reg = snd_hdac_chip_readb(bus, VS_D0I3C);
+	/* Do not write to D0I3C until command in progress bit is cleared */
+	while ((reg & AZX_REG_VS_D0I3C_CIP) && --timeout) {
+		udelay(10);
+		reg = snd_hdac_chip_readb(bus, VS_D0I3C);
+	}
+
+	/* Highly unlikely. But if it happens, flag error explicitly */
+	if (!timeout) {
+		dev_err(bus->dev, "Before D0I3C update: D0I3C CIP timeout\n");
+		return;
+	}
+
+	if (enable)
+		reg = reg | AZX_REG_VS_D0I3C_I3;
+	else
+		reg = reg & (~AZX_REG_VS_D0I3C_I3);
+
+	snd_hdac_chip_writeb(bus, VS_D0I3C, reg);
+
+	timeout = 50;
+	/* Wait for cmd in progress to be cleared before exiting the function */
+	reg = snd_hdac_chip_readb(bus, VS_D0I3C);
+	while ((reg & AZX_REG_VS_D0I3C_CIP) && --timeout) {
+		udelay(10);
+		reg = snd_hdac_chip_readb(bus, VS_D0I3C);
+	}
+
+	/* Highly unlikely. But if it happens, flag error explicitly */
+	if (!timeout) {
+		dev_err(bus->dev, "After D0I3C update: D0I3C CIP timeout\n");
+		return;
+	}
+
+	dev_dbg(bus->dev, "D0I3C register = 0x%x\n",
+			snd_hdac_chip_readb(bus, VS_D0I3C));
+}
+
+/**
+ * skl_dum_set - set DUM bit in EM2 register
+ * @bus: HD-audio core bus
+ *
+ * Addresses incorrect position reporting for capture streams.
+ * Used on device power up.
+ */
+static void skl_dum_set(struct hdac_bus *bus)
+{
+	/* For the DUM bit to be set, CRST needs to be out of reset state */
+	if (!(snd_hdac_chip_readb(bus, GCTL) & AZX_GCTL_RESET)) {
+		skl_enable_miscbdcge(bus->dev, false);
+		snd_hdac_bus_exit_link_reset(bus);
+		skl_enable_miscbdcge(bus->dev, true);
+	}
+
+	snd_hdac_chip_updatel(bus, VS_EM2, AZX_VS_EM2_DUM, AZX_VS_EM2_DUM);
+}
+
+/* called from IRQ */
+static void skl_stream_update(struct hdac_bus *bus, struct hdac_stream *hstr)
+{
+	snd_pcm_period_elapsed(hstr->substream);
+}
+
+static irqreturn_t skl_interrupt(int irq, void *dev_id)
+{
+	struct hdac_bus *bus = dev_id;
+	u32 status;
+
+	if (!pm_runtime_active(bus->dev))
+		return IRQ_NONE;
+
+	spin_lock(&bus->reg_lock);
+
+	status = snd_hdac_chip_readl(bus, INTSTS);
+	if (status == 0 || status == 0xffffffff) {
+		spin_unlock(&bus->reg_lock);
+		return IRQ_NONE;
+	}
+
+	/* clear rirb int */
+	status = snd_hdac_chip_readb(bus, RIRBSTS);
+	if (status & RIRB_INT_MASK) {
+		if (status & RIRB_INT_RESPONSE)
+			snd_hdac_bus_update_rirb(bus);
+		snd_hdac_chip_writeb(bus, RIRBSTS, RIRB_INT_MASK);
+	}
+
+	spin_unlock(&bus->reg_lock);
+
+	return snd_hdac_chip_readl(bus, INTSTS) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
+}
+
+static irqreturn_t skl_threaded_handler(int irq, void *dev_id)
+{
+	struct hdac_bus *bus = dev_id;
+	u32 status;
+
+	status = snd_hdac_chip_readl(bus, INTSTS);
+
+	snd_hdac_bus_handle_stream_irq(bus, status, skl_stream_update);
+
+	return IRQ_HANDLED;
+}
+
+static int skl_acquire_irq(struct hdac_bus *bus, int do_disconnect)
+{
+	struct skl_dev *skl = bus_to_skl(bus);
+	int ret;
+
+	ret = request_threaded_irq(skl->pci->irq, skl_interrupt,
+			skl_threaded_handler,
+			IRQF_SHARED,
+			KBUILD_MODNAME, bus);
+	if (ret) {
+		dev_err(bus->dev,
+			"unable to grab IRQ %d, disabling device\n",
+			skl->pci->irq);
+		return ret;
+	}
+
+	bus->irq = skl->pci->irq;
+	pci_intx(skl->pci, 1);
+
+	return 0;
+}
+
+static int skl_suspend_late(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	struct skl_dev *skl = bus_to_skl(bus);
+
+	return skl_suspend_late_dsp(skl);
+}
+
+#ifdef CONFIG_PM
+static int _skl_suspend(struct hdac_bus *bus)
+{
+	struct skl_dev *skl = bus_to_skl(bus);
+	struct pci_dev *pci = to_pci_dev(bus->dev);
+	int ret;
+
+	snd_hdac_ext_bus_link_power_down_all(bus);
+
+	ret = skl_suspend_dsp(skl);
+	if (ret < 0)
+		return ret;
+
+	snd_hdac_bus_stop_chip(bus);
+	update_pci_dword(pci, AZX_PCIREG_PGCTL,
+		AZX_PGCTL_LSRMD_MASK, AZX_PGCTL_LSRMD_MASK);
+	skl_enable_miscbdcge(bus->dev, false);
+	snd_hdac_bus_enter_link_reset(bus);
+	skl_enable_miscbdcge(bus->dev, true);
+	skl_cleanup_resources(skl);
+
+	return 0;
+}
+
+static int _skl_resume(struct hdac_bus *bus)
+{
+	struct skl_dev *skl = bus_to_skl(bus);
+
+	skl_init_pci(skl);
+	skl_dum_set(bus);
+	skl_init_chip(bus, true);
+
+	return skl_resume_dsp(skl);
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+/*
+ * power management
+ */
+static int skl_suspend(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	struct skl_dev *skl  = bus_to_skl(bus);
+	int ret;
+
+	/*
+	 * Do not suspend if streams which are marked ignore suspend are
+	 * running, we need to save the state for these and continue
+	 */
+	if (skl->supend_active) {
+		/* turn off the links and stop the CORB/RIRB DMA if it is On */
+		snd_hdac_ext_bus_link_power_down_all(bus);
+
+		if (bus->cmd_dma_state)
+			snd_hdac_bus_stop_cmd_io(bus);
+
+		enable_irq_wake(bus->irq);
+		pci_save_state(pci);
+	} else {
+		ret = _skl_suspend(bus);
+		if (ret < 0)
+			return ret;
+		skl->fw_loaded = false;
+	}
+
+	return 0;
+}
+
+static int skl_resume(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	struct skl_dev *skl  = bus_to_skl(bus);
+	struct hdac_ext_link *hlink;
+	int ret;
+
+	/*
+	 * resume only when we are not in suspend active, otherwise need to
+	 * restore the device
+	 */
+	if (skl->supend_active) {
+		pci_restore_state(pci);
+		snd_hdac_ext_bus_link_power_up_all(bus);
+		disable_irq_wake(bus->irq);
+		/*
+		 * turn On the links which are On before active suspend
+		 * and start the CORB/RIRB DMA if On before
+		 * active suspend.
+		 */
+		list_for_each_entry(hlink, &bus->hlink_list, list) {
+			if (hlink->ref_count)
+				snd_hdac_ext_bus_link_power_up(hlink);
+		}
+
+		ret = 0;
+		if (bus->cmd_dma_state)
+			snd_hdac_bus_init_cmd_io(bus);
+	} else {
+		ret = _skl_resume(bus);
+	}
+
+	return ret;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM
+static int skl_runtime_suspend(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+
+	dev_dbg(bus->dev, "in %s\n", __func__);
+
+	return _skl_suspend(bus);
+}
+
+static int skl_runtime_resume(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+
+	dev_dbg(bus->dev, "in %s\n", __func__);
+
+	return _skl_resume(bus);
+}
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops skl_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(skl_suspend, skl_resume)
+	SET_RUNTIME_PM_OPS(skl_runtime_suspend, skl_runtime_resume, NULL)
+	.suspend_late = skl_suspend_late,
+};
+
+/*
+ * destructor
+ */
+static int skl_free(struct hdac_bus *bus)
+{
+	struct skl_dev *skl  = bus_to_skl(bus);
+
+	skl->init_done = 0; /* to be sure */
+
+	snd_hdac_stop_streams_and_chip(bus);
+
+	if (bus->irq >= 0)
+		free_irq(bus->irq, (void *)bus);
+	snd_hdac_bus_free_stream_pages(bus);
+	snd_hdac_ext_stream_free_all(bus);
+	snd_hdac_ext_link_free_all(bus);
+
+	if (bus->remap_addr)
+		iounmap(bus->remap_addr);
+
+	pci_release_regions(skl->pci);
+	pci_disable_device(skl->pci);
+
+	snd_hdac_ext_bus_exit(bus);
+
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
+		snd_hdac_i915_exit(bus);
+	}
+
+	return 0;
+}
+
+/*
+ * For each ssp there are 3 clocks (mclk/sclk/sclkfs).
+ * e.g. for ssp0, clocks will be named as
+ *      "ssp0_mclk", "ssp0_sclk", "ssp0_sclkfs"
+ * So for skl+, there are 6 ssps, so 18 clocks will be created.
+ */
+static struct skl_ssp_clk skl_ssp_clks[] = {
+	{.name = "ssp0_mclk"}, {.name = "ssp1_mclk"}, {.name = "ssp2_mclk"},
+	{.name = "ssp3_mclk"}, {.name = "ssp4_mclk"}, {.name = "ssp5_mclk"},
+	{.name = "ssp0_sclk"}, {.name = "ssp1_sclk"}, {.name = "ssp2_sclk"},
+	{.name = "ssp3_sclk"}, {.name = "ssp4_sclk"}, {.name = "ssp5_sclk"},
+	{.name = "ssp0_sclkfs"}, {.name = "ssp1_sclkfs"},
+						{.name = "ssp2_sclkfs"},
+	{.name = "ssp3_sclkfs"}, {.name = "ssp4_sclkfs"},
+						{.name = "ssp5_sclkfs"},
+};
+
+static struct snd_soc_acpi_mach *skl_find_hda_machine(struct skl_dev *skl,
+					struct snd_soc_acpi_mach *machines)
+{
+	struct snd_soc_acpi_mach *mach;
+
+	/* point to common table */
+	mach = snd_soc_acpi_intel_hda_machines;
+
+	/* all entries in the machine table use the same firmware */
+	mach->fw_filename = machines->fw_filename;
+
+	return mach;
+}
+
+static int skl_find_machine(struct skl_dev *skl, void *driver_data)
+{
+	struct hdac_bus *bus = skl_to_bus(skl);
+	struct snd_soc_acpi_mach *mach = driver_data;
+	struct skl_machine_pdata *pdata;
+
+	mach = snd_soc_acpi_find_machine(mach);
+	if (!mach) {
+		dev_dbg(bus->dev, "No matching I2S machine driver found\n");
+		mach = skl_find_hda_machine(skl, driver_data);
+		if (!mach) {
+			dev_err(bus->dev, "No matching machine driver found\n");
+			return -ENODEV;
+		}
+	}
+
+	skl->mach = mach;
+	skl->fw_name = mach->fw_filename;
+	pdata = mach->pdata;
+
+	if (pdata) {
+		skl->use_tplg_pcm = pdata->use_tplg_pcm;
+		mach->mach_params.dmic_num =
+			intel_nhlt_get_dmic_geo(&skl->pci->dev,
+						skl->nhlt);
+	}
+
+	return 0;
+}
+
+static int skl_machine_device_register(struct skl_dev *skl)
+{
+	struct snd_soc_acpi_mach *mach = skl->mach;
+	struct hdac_bus *bus = skl_to_bus(skl);
+	struct platform_device *pdev;
+	int ret;
+
+	pdev = platform_device_alloc(mach->drv_name, -1);
+	if (pdev == NULL) {
+		dev_err(bus->dev, "platform device alloc failed\n");
+		return -EIO;
+	}
+
+	mach->mach_params.platform = dev_name(bus->dev);
+	mach->mach_params.codec_mask = bus->codec_mask;
+
+	ret = platform_device_add_data(pdev, (const void *)mach, sizeof(*mach));
+	if (ret) {
+		dev_err(bus->dev, "failed to add machine device platform data\n");
+		platform_device_put(pdev);
+		return ret;
+	}
+
+	ret = platform_device_add(pdev);
+	if (ret) {
+		dev_err(bus->dev, "failed to add machine device\n");
+		platform_device_put(pdev);
+		return -EIO;
+	}
+
+
+	skl->i2s_dev = pdev;
+
+	return 0;
+}
+
+static void skl_machine_device_unregister(struct skl_dev *skl)
+{
+	if (skl->i2s_dev)
+		platform_device_unregister(skl->i2s_dev);
+}
+
+static int skl_dmic_device_register(struct skl_dev *skl)
+{
+	struct hdac_bus *bus = skl_to_bus(skl);
+	struct platform_device *pdev;
+	int ret;
+
+	/* SKL has one dmic port, so allocate dmic device for this */
+	pdev = platform_device_alloc("dmic-codec", -1);
+	if (!pdev) {
+		dev_err(bus->dev, "failed to allocate dmic device\n");
+		return -ENOMEM;
+	}
+
+	ret = platform_device_add(pdev);
+	if (ret) {
+		dev_err(bus->dev, "failed to add dmic device: %d\n", ret);
+		platform_device_put(pdev);
+		return ret;
+	}
+	skl->dmic_dev = pdev;
+
+	return 0;
+}
+
+static void skl_dmic_device_unregister(struct skl_dev *skl)
+{
+	if (skl->dmic_dev)
+		platform_device_unregister(skl->dmic_dev);
+}
+
+static struct skl_clk_parent_src skl_clk_src[] = {
+	{ .clk_id = SKL_XTAL, .name = "xtal" },
+	{ .clk_id = SKL_CARDINAL, .name = "cardinal", .rate = 24576000 },
+	{ .clk_id = SKL_PLL, .name = "pll", .rate = 96000000 },
+};
+
+struct skl_clk_parent_src *skl_get_parent_clk(u8 clk_id)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(skl_clk_src); i++) {
+		if (skl_clk_src[i].clk_id == clk_id)
+			return &skl_clk_src[i];
+	}
+
+	return NULL;
+}
+
+static void init_skl_xtal_rate(int pci_id)
+{
+	switch (pci_id) {
+	case PCI_DEVICE_ID_INTEL_HDA_SKL_LP:
+	case PCI_DEVICE_ID_INTEL_HDA_KBL_LP:
+		skl_clk_src[0].rate = 24000000;
+		return;
+
+	default:
+		skl_clk_src[0].rate = 19200000;
+		return;
+	}
+}
+
+static int skl_clock_device_register(struct skl_dev *skl)
+{
+	struct platform_device_info pdevinfo = {NULL};
+	struct skl_clk_pdata *clk_pdata;
+
+	if (!skl->nhlt)
+		return 0;
+
+	clk_pdata = devm_kzalloc(&skl->pci->dev, sizeof(*clk_pdata),
+							GFP_KERNEL);
+	if (!clk_pdata)
+		return -ENOMEM;
+
+	init_skl_xtal_rate(skl->pci->device);
+
+	clk_pdata->parent_clks = skl_clk_src;
+	clk_pdata->ssp_clks = skl_ssp_clks;
+	clk_pdata->num_clks = ARRAY_SIZE(skl_ssp_clks);
+
+	/* Query NHLT to fill the rates and parent */
+	skl_get_clks(skl, clk_pdata->ssp_clks);
+	clk_pdata->pvt_data = skl;
+
+	/* Register Platform device */
+	pdevinfo.parent = &skl->pci->dev;
+	pdevinfo.id = -1;
+	pdevinfo.name = "skl-ssp-clk";
+	pdevinfo.data = clk_pdata;
+	pdevinfo.size_data = sizeof(*clk_pdata);
+	skl->clk_dev = platform_device_register_full(&pdevinfo);
+	return PTR_ERR_OR_ZERO(skl->clk_dev);
+}
+
+static void skl_clock_device_unregister(struct skl_dev *skl)
+{
+	if (skl->clk_dev)
+		platform_device_unregister(skl->clk_dev);
+}
+
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+
+#define IDISP_INTEL_VENDOR_ID	0x80860000
+
+/*
+ * load the legacy codec driver
+ */
+static void load_codec_module(struct hda_codec *codec)
+{
+#ifdef MODULE
+	char modalias[MODULE_NAME_LEN];
+	const char *mod = NULL;
+
+	snd_hdac_codec_modalias(&codec->core, modalias, sizeof(modalias));
+	mod = modalias;
+	dev_dbg(&codec->core.dev, "loading %s codec module\n", mod);
+	request_module(mod);
+#endif
+}
+
+#endif /* CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC */
+
+static struct hda_codec *skl_codec_device_init(struct hdac_bus *bus, int addr)
+{
+	struct hda_codec *codec;
+	int ret;
+
+	codec = snd_hda_codec_device_init(to_hda_bus(bus), addr, "ehdaudio%dD%d", bus->idx, addr);
+	if (IS_ERR(codec)) {
+		dev_err(bus->dev, "device init failed for hdac device\n");
+		return codec;
+	}
+
+	codec->core.type = HDA_DEV_ASOC;
+
+	ret = snd_hdac_device_register(&codec->core);
+	if (ret) {
+		dev_err(bus->dev, "failed to register hdac device\n");
+		put_device(&codec->core.dev);
+		return ERR_PTR(ret);
+	}
+
+	return codec;
+}
+
+/*
+ * Probe the given codec address
+ */
+static int probe_codec(struct hdac_bus *bus, int addr)
+{
+	unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) |
+		(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
+	unsigned int res = -1;
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+	struct skl_dev *skl = bus_to_skl(bus);
+	struct hdac_hda_priv *hda_codec;
+#endif
+	struct hda_codec *codec;
+
+	mutex_lock(&bus->cmd_mutex);
+	snd_hdac_bus_send_cmd(bus, cmd);
+	snd_hdac_bus_get_response(bus, addr, &res);
+	mutex_unlock(&bus->cmd_mutex);
+	if (res == -1)
+		return -EIO;
+	dev_dbg(bus->dev, "codec #%d probed OK: %x\n", addr, res);
+
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+	hda_codec = devm_kzalloc(&skl->pci->dev, sizeof(*hda_codec),
+				 GFP_KERNEL);
+	if (!hda_codec)
+		return -ENOMEM;
+
+	codec = skl_codec_device_init(bus, addr);
+	if (IS_ERR(codec))
+		return PTR_ERR(codec);
+
+	hda_codec->codec = codec;
+	dev_set_drvdata(&codec->core.dev, hda_codec);
+
+	/* use legacy bus only for HDA codecs, idisp uses ext bus */
+	if ((res & 0xFFFF0000) != IDISP_INTEL_VENDOR_ID) {
+		codec->core.type = HDA_DEV_LEGACY;
+		load_codec_module(hda_codec->codec);
+	}
+	return 0;
+#else
+	codec = skl_codec_device_init(bus, addr);
+	return PTR_ERR_OR_ZERO(codec);
+#endif /* CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC */
+}
+
+/* Codec initialization */
+static void skl_codec_create(struct hdac_bus *bus)
+{
+	int c, max_slots;
+
+	max_slots = HDA_MAX_CODECS;
+
+	/* First try to probe all given codec slots */
+	for (c = 0; c < max_slots; c++) {
+		if ((bus->codec_mask & (1 << c))) {
+			if (probe_codec(bus, c) < 0) {
+				/*
+				 * Some BIOSen give you wrong codec addresses
+				 * that don't exist
+				 */
+				dev_warn(bus->dev,
+					 "Codec #%d probe error; disabling it...\n", c);
+				bus->codec_mask &= ~(1 << c);
+				/*
+				 * More badly, accessing to a non-existing
+				 * codec often screws up the controller bus,
+				 * and disturbs the further communications.
+				 * Thus if an error occurs during probing,
+				 * better to reset the controller bus to get
+				 * back to the sanity state.
+				 */
+				snd_hdac_bus_stop_chip(bus);
+				skl_init_chip(bus, true);
+			}
+		}
+	}
+}
+
+static int skl_i915_init(struct hdac_bus *bus)
+{
+	int err;
+
+	/*
+	 * The HDMI codec is in GPU so we need to ensure that it is powered
+	 * up and ready for probe
+	 */
+	err = snd_hdac_i915_init(bus);
+	if (err < 0)
+		return err;
+
+	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
+
+	return 0;
+}
+
+static void skl_probe_work(struct work_struct *work)
+{
+	struct skl_dev *skl = container_of(work, struct skl_dev, probe_work);
+	struct hdac_bus *bus = skl_to_bus(skl);
+	struct hdac_ext_link *hlink;
+	int err;
+
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
+		err = skl_i915_init(bus);
+		if (err < 0)
+			return;
+	}
+
+	skl_init_pci(skl);
+	skl_dum_set(bus);
+
+	err = skl_init_chip(bus, true);
+	if (err < 0) {
+		dev_err(bus->dev, "Init chip failed with err: %d\n", err);
+		goto out_err;
+	}
+
+	/* codec detection */
+	if (!bus->codec_mask)
+		dev_info(bus->dev, "no hda codecs found!\n");
+
+	/* create codec instances */
+	skl_codec_create(bus);
+
+	/* register platform dai and controls */
+	err = skl_platform_register(bus->dev);
+	if (err < 0) {
+		dev_err(bus->dev, "platform register failed: %d\n", err);
+		goto out_err;
+	}
+
+	err = skl_machine_device_register(skl);
+	if (err < 0) {
+		dev_err(bus->dev, "machine register failed: %d\n", err);
+		goto out_err;
+	}
+
+	/*
+	 * we are done probing so decrement link counts
+	 */
+	list_for_each_entry(hlink, &bus->hlink_list, list)
+		snd_hdac_ext_bus_link_put(bus, hlink);
+
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
+
+	/* configure PM */
+	pm_runtime_put_noidle(bus->dev);
+	pm_runtime_allow(bus->dev);
+	skl->init_done = 1;
+
+	return;
+
+out_err:
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
+}
+
+/*
+ * constructor
+ */
+static int skl_create(struct pci_dev *pci,
+		      struct skl_dev **rskl)
+{
+	struct hdac_ext_bus_ops *ext_ops = NULL;
+	struct skl_dev *skl;
+	struct hdac_bus *bus;
+	struct hda_bus *hbus;
+	int err;
+
+	*rskl = NULL;
+
+	err = pci_enable_device(pci);
+	if (err < 0)
+		return err;
+
+	skl = devm_kzalloc(&pci->dev, sizeof(*skl), GFP_KERNEL);
+	if (!skl) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+
+	hbus = skl_to_hbus(skl);
+	bus = skl_to_bus(skl);
+
+	INIT_LIST_HEAD(&skl->ppl_list);
+	INIT_LIST_HEAD(&skl->bind_list);
+
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+	ext_ops = snd_soc_hdac_hda_get_ops();
+#endif
+	snd_hdac_ext_bus_init(bus, &pci->dev, NULL, ext_ops);
+	bus->use_posbuf = 1;
+	skl->pci = pci;
+	INIT_WORK(&skl->probe_work, skl_probe_work);
+	bus->bdl_pos_adj = 0;
+
+	mutex_init(&hbus->prepare_mutex);
+	hbus->pci = pci;
+	hbus->mixer_assigned = -1;
+	hbus->modelname = "sklbus";
+
+	*rskl = skl;
+
+	return 0;
+}
+
+static int skl_first_init(struct hdac_bus *bus)
+{
+	struct skl_dev *skl = bus_to_skl(bus);
+	struct pci_dev *pci = skl->pci;
+	int err;
+	unsigned short gcap;
+	int cp_streams, pb_streams, start_idx;
+
+	err = pci_request_regions(pci, "Skylake HD audio");
+	if (err < 0)
+		return err;
+
+	bus->addr = pci_resource_start(pci, 0);
+	bus->remap_addr = pci_ioremap_bar(pci, 0);
+	if (bus->remap_addr == NULL) {
+		dev_err(bus->dev, "ioremap error\n");
+		return -ENXIO;
+	}
+
+	snd_hdac_bus_parse_capabilities(bus);
+
+	/* check if PPCAP exists */
+	if (!bus->ppcap) {
+		dev_err(bus->dev, "bus ppcap not set, HDAudio or DSP not present?\n");
+		return -ENODEV;
+	}
+
+	if (skl_acquire_irq(bus, 0) < 0)
+		return -EBUSY;
+
+	pci_set_master(pci);
+	synchronize_irq(bus->irq);
+
+	gcap = snd_hdac_chip_readw(bus, GCAP);
+	dev_dbg(bus->dev, "chipset global capabilities = 0x%x\n", gcap);
+
+	/* read number of streams from GCAP register */
+	cp_streams = (gcap >> 8) & 0x0f;
+	pb_streams = (gcap >> 12) & 0x0f;
+
+	if (!pb_streams && !cp_streams) {
+		dev_err(bus->dev, "no streams found in GCAP definitions?\n");
+		return -EIO;
+	}
+
+	bus->num_streams = cp_streams + pb_streams;
+
+	/* allow 64bit DMA address if supported by H/W */
+	if (dma_set_mask_and_coherent(bus->dev, DMA_BIT_MASK(64)))
+		dma_set_mask_and_coherent(bus->dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(bus->dev, UINT_MAX);
+
+	/* initialize streams */
+	snd_hdac_ext_stream_init_all
+		(bus, 0, cp_streams, SNDRV_PCM_STREAM_CAPTURE);
+	start_idx = cp_streams;
+	snd_hdac_ext_stream_init_all
+		(bus, start_idx, pb_streams, SNDRV_PCM_STREAM_PLAYBACK);
+
+	err = snd_hdac_bus_alloc_stream_pages(bus);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int skl_probe(struct pci_dev *pci,
+		     const struct pci_device_id *pci_id)
+{
+	struct skl_dev *skl;
+	struct hdac_bus *bus = NULL;
+	int err;
+
+	switch (skl_pci_binding) {
+	case SND_SKL_PCI_BIND_AUTO:
+		err = snd_intel_dsp_driver_probe(pci);
+		if (err != SND_INTEL_DSP_DRIVER_ANY &&
+		    err != SND_INTEL_DSP_DRIVER_SST)
+			return -ENODEV;
+		break;
+	case SND_SKL_PCI_BIND_LEGACY:
+		dev_info(&pci->dev, "Module parameter forced binding with HDAudio legacy, aborting probe\n");
+		return -ENODEV;
+	case SND_SKL_PCI_BIND_ASOC:
+		dev_info(&pci->dev, "Module parameter forced binding with SKL driver, bypassed detection logic\n");
+		break;
+	default:
+		dev_err(&pci->dev, "invalid value for skl_pci_binding module parameter, ignored\n");
+		break;
+	}
+
+	/* we use ext core ops, so provide NULL for ops here */
+	err = skl_create(pci, &skl);
+	if (err < 0)
+		return err;
+
+	bus = skl_to_bus(skl);
+
+	err = skl_first_init(bus);
+	if (err < 0) {
+		dev_err(bus->dev, "skl_first_init failed with err: %d\n", err);
+		goto out_free;
+	}
+
+	skl->pci_id = pci->device;
+
+	device_disable_async_suspend(bus->dev);
+
+	skl->nhlt = intel_nhlt_init(bus->dev);
+
+	if (skl->nhlt == NULL) {
+#if !IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+		dev_err(bus->dev, "no nhlt info found\n");
+		err = -ENODEV;
+		goto out_free;
+#else
+		dev_warn(bus->dev, "no nhlt info found, continuing to try to enable HDAudio codec\n");
+#endif
+	} else {
+
+		err = skl_nhlt_create_sysfs(skl);
+		if (err < 0) {
+			dev_err(bus->dev, "skl_nhlt_create_sysfs failed with err: %d\n", err);
+			goto out_nhlt_free;
+		}
+
+		skl_nhlt_update_topology_bin(skl);
+
+		/* create device for dsp clk */
+		err = skl_clock_device_register(skl);
+		if (err < 0) {
+			dev_err(bus->dev, "skl_clock_device_register failed with err: %d\n", err);
+			goto out_clk_free;
+		}
+	}
+
+	pci_set_drvdata(skl->pci, bus);
+
+
+	err = skl_find_machine(skl, (void *)pci_id->driver_data);
+	if (err < 0) {
+		dev_err(bus->dev, "skl_find_machine failed with err: %d\n", err);
+		goto out_nhlt_free;
+	}
+
+	err = skl_init_dsp(skl);
+	if (err < 0) {
+		dev_dbg(bus->dev, "error failed to register dsp\n");
+		goto out_nhlt_free;
+	}
+	skl->enable_miscbdcge = skl_enable_miscbdcge;
+	skl->clock_power_gating = skl_clock_power_gating;
+
+	if (bus->mlcap)
+		snd_hdac_ext_bus_get_ml_capabilities(bus);
+
+	/* create device for soc dmic */
+	err = skl_dmic_device_register(skl);
+	if (err < 0) {
+		dev_err(bus->dev, "skl_dmic_device_register failed with err: %d\n", err);
+		goto out_dsp_free;
+	}
+
+	schedule_work(&skl->probe_work);
+
+	return 0;
+
+out_dsp_free:
+	skl_free_dsp(skl);
+out_clk_free:
+	skl_clock_device_unregister(skl);
+out_nhlt_free:
+	if (skl->nhlt)
+		intel_nhlt_free(skl->nhlt);
+out_free:
+	skl_free(bus);
+
+	return err;
+}
+
+static void skl_shutdown(struct pci_dev *pci)
+{
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	struct hdac_stream *s;
+	struct hdac_ext_stream *stream;
+	struct skl_dev *skl;
+
+	if (!bus)
+		return;
+
+	skl = bus_to_skl(bus);
+
+	if (!skl->init_done)
+		return;
+
+	snd_hdac_stop_streams(bus);
+	snd_hdac_ext_bus_link_power_down_all(bus);
+	skl_dsp_sleep(skl->dsp);
+
+	list_for_each_entry(s, &bus->stream_list, list) {
+		stream = stream_to_hdac_ext_stream(s);
+		snd_hdac_ext_stream_decouple(bus, stream, false);
+	}
+
+	snd_hdac_bus_stop_chip(bus);
+}
+
+static void skl_remove(struct pci_dev *pci)
+{
+	struct hdac_bus *bus = pci_get_drvdata(pci);
+	struct skl_dev *skl = bus_to_skl(bus);
+
+	cancel_work_sync(&skl->probe_work);
+
+	pm_runtime_get_noresume(&pci->dev);
+
+	/* codec removal, invoke bus_device_remove */
+	snd_hdac_ext_bus_device_remove(bus);
+
+	skl_platform_unregister(&pci->dev);
+	skl_free_dsp(skl);
+	skl_machine_device_unregister(skl);
+	skl_dmic_device_unregister(skl);
+	skl_clock_device_unregister(skl);
+	skl_nhlt_remove_sysfs(skl);
+	if (skl->nhlt)
+		intel_nhlt_free(skl->nhlt);
+	skl_free(bus);
+}
+
+/* PCI IDs */
+static const struct pci_device_id skl_ids[] = {
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKL)
+	{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, &snd_soc_acpi_intel_skl_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_APL)
+	{ PCI_DEVICE_DATA(INTEL, HDA_APL, &snd_soc_acpi_intel_bxt_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_KBL)
+	{ PCI_DEVICE_DATA(INTEL, HDA_KBL_LP, &snd_soc_acpi_intel_kbl_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_GLK)
+	{ PCI_DEVICE_DATA(INTEL, HDA_GML, &snd_soc_acpi_intel_glk_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_CNL)
+	{ PCI_DEVICE_DATA(INTEL, HDA_CNL_LP, &snd_soc_acpi_intel_cnl_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_CFL)
+	{ PCI_DEVICE_DATA(INTEL, HDA_CNL_H, &snd_soc_acpi_intel_cnl_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_CML_LP)
+	{ PCI_DEVICE_DATA(INTEL, HDA_CML_LP, &snd_soc_acpi_intel_cnl_machines) },
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_INTEL_CML_H)
+	{ PCI_DEVICE_DATA(INTEL, HDA_CML_H, &snd_soc_acpi_intel_cnl_machines) },
+#endif
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, skl_ids);
+
+/* pci_driver definition */
+static struct pci_driver skl_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = skl_ids,
+	.probe = skl_probe,
+	.remove = skl_remove,
+	.shutdown = skl_shutdown,
+	.driver = {
+		.pm = &skl_pm,
+	},
+};
+module_pci_driver(skl_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Intel Skylake ASoC HDA driver");