sound/soc/sof/imx/imx8.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 //
 // Copyright 2019 NXP
 //
 // Author: Daniel Baluta <daniel.baluta@nxp.com>
 //
 // Hardware interface for audio DSP on i.MX8

 #include <linux/firmware.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/pm_domain.h>

 #include <linux/module.h>
 #include <sound/sof.h>
 #include <sound/sof/xtensa.h>
 #include <linux/firmware/imx/ipc.h>
 #include <linux/firmware/imx/dsp.h>

 #include <linux/firmware/imx/svc/misc.h>
 #include <dt-bindings/firmware/imx/rsrc.h>
 #include "../ops.h"
 #include "imx-common.h"

 /* DSP memories */
 #define IRAM_OFFSET		0x10000
 #define IRAM_SIZE		(2 * 1024)
 #define DRAM0_OFFSET		0x0
 #define DRAM0_SIZE		(32 * 1024)
 #define DRAM1_OFFSET		0x8000
 #define DRAM1_SIZE		(32 * 1024)
 #define SYSRAM_OFFSET		0x18000
 #define SYSRAM_SIZE		(256 * 1024)
 #define SYSROM_OFFSET		0x58000
 #define SYSROM_SIZE		(192 * 1024)

 #define RESET_VECTOR_VADDR	0x596f8000

 #define MBOX_OFFSET	0x800000
 #define MBOX_SIZE	0x1000

 struct imx8_priv {
 	struct device *dev;
 	struct snd_sof_dev *sdev;

 	/* DSP IPC handler */
 	struct imx_dsp_ipc *dsp_ipc;
 	struct platform_device *ipc_dev;

 	/* System Controller IPC handler */
 	struct imx_sc_ipc *sc_ipc;

 	/* Power domain handling */
 	int num_domains;
 	struct device **pd_dev;
 	struct device_link **link;

 };

 static void imx8_get_reply(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_ipc_msg *msg = sdev->msg;
 	struct sof_ipc_reply reply;
 	int ret = 0;

 	if (!msg) {
 		dev_warn(sdev->dev, "unexpected ipc interrupt\n");
 		return;
 	}

 	/* get reply */
 	sof_mailbox_read(sdev, sdev->host_box.offset, &reply, sizeof(reply));

 	if (reply.error < 0) {
 		memcpy(msg->reply_data, &reply, sizeof(reply));
 		ret = reply.error;
 	} else {
 		/* reply has correct size? */
 		if (reply.hdr.size != msg->reply_size) {
 			dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n",
 				msg->reply_size, reply.hdr.size);
 			ret = -EINVAL;
 		}

 		/* read the message */
 		if (msg->reply_size > 0)
 			sof_mailbox_read(sdev, sdev->host_box.offset,
 					 msg->reply_data, msg->reply_size);
 	}

 	msg->reply_error = ret;
 }

 static int imx8_get_mailbox_offset(struct snd_sof_dev *sdev)
 {
 	return MBOX_OFFSET;
 }

 static int imx8_get_window_offset(struct snd_sof_dev *sdev, u32 id)
 {
 	return MBOX_OFFSET;
 }

 static void imx8_dsp_handle_reply(struct imx_dsp_ipc *ipc)
 {
 	struct imx8_priv *priv = imx_dsp_get_data(ipc);
 	unsigned long flags;

 	spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
 	imx8_get_reply(priv->sdev);
 	snd_sof_ipc_reply(priv->sdev, 0);
 	spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
 }

 static void imx8_dsp_handle_request(struct imx_dsp_ipc *ipc)
 {
 	struct imx8_priv *priv = imx_dsp_get_data(ipc);
 	u32 p; /* panic code */

 	/* Read the message from the debug box. */
 	sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p));

 	/* Check to see if the message is a panic code (0x0dead***) */
 	if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC)
 		snd_sof_dsp_panic(priv->sdev, p);
 	else
 		snd_sof_ipc_msgs_rx(priv->sdev);
 }

 static struct imx_dsp_ops dsp_ops = {
 	.handle_reply		= imx8_dsp_handle_reply,
 	.handle_request		= imx8_dsp_handle_request,
 };

 static int imx8_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
 {
 	struct imx8_priv *priv = sdev->pdata->hw_pdata;

 	sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
 			  msg->msg_size);
 	imx_dsp_ring_doorbell(priv->dsp_ipc, 0);

 	return 0;
 }

 /*
  * DSP control.
  */
 static int imx8x_run(struct snd_sof_dev *sdev)
 {
 	struct imx8_priv *dsp_priv = sdev->pdata->hw_pdata;
 	int ret;

 	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
 				      IMX_SC_C_OFS_SEL, 1);
 	if (ret < 0) {
 		dev_err(sdev->dev, "Error system address offset source select\n");
 		return ret;
 	}

 	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
 				      IMX_SC_C_OFS_AUDIO, 0x80);
 	if (ret < 0) {
 		dev_err(sdev->dev, "Error system address offset of AUDIO\n");
 		return ret;
 	}

 	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
 				      IMX_SC_C_OFS_PERIPH, 0x5A);
 	if (ret < 0) {
 		dev_err(sdev->dev, "Error system address offset of PERIPH %d\n",
 			ret);
 		return ret;
 	}

 	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
 				      IMX_SC_C_OFS_IRQ, 0x51);
 	if (ret < 0) {
 		dev_err(sdev->dev, "Error system address offset of IRQ\n");
 		return ret;
 	}

 	imx_sc_pm_cpu_start(dsp_priv->sc_ipc, IMX_SC_R_DSP, true,
 			    RESET_VECTOR_VADDR);

 	return 0;
 }

 static int imx8_run(struct snd_sof_dev *sdev)
 {
 	struct imx8_priv *dsp_priv = sdev->pdata->hw_pdata;
 	int ret;

 	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
 				      IMX_SC_C_OFS_SEL, 0);
 	if (ret < 0) {
 		dev_err(sdev->dev, "Error system address offset source select\n");
 		return ret;
 	}

 	imx_sc_pm_cpu_start(dsp_priv->sc_ipc, IMX_SC_R_DSP, true,
 			    RESET_VECTOR_VADDR);

 	return 0;
 }

 static int imx8_probe(struct snd_sof_dev *sdev)
 {
 	struct platform_device *pdev =
 		container_of(sdev->dev, struct platform_device, dev);
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *res_node;
 	struct resource *mmio;
 	struct imx8_priv *priv;
 	struct resource res;
 	u32 base, size;
 	int ret = 0;
 	int i;

 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	sdev->pdata->hw_pdata = priv;
 	priv->dev = sdev->dev;
 	priv->sdev = sdev;

 	/* power up device associated power domains */
 	priv->num_domains = of_count_phandle_with_args(np, "power-domains",
 						       "#power-domain-cells");
 	if (priv->num_domains < 0) {
 		dev_err(sdev->dev, "no power-domains property in %pOF\n", np);
 		return priv->num_domains;
 	}

 	priv->pd_dev = devm_kmalloc_array(&pdev->dev, priv->num_domains,
 					  sizeof(*priv->pd_dev), GFP_KERNEL);
 	if (!priv->pd_dev)
 		return -ENOMEM;

 	priv->link = devm_kmalloc_array(&pdev->dev, priv->num_domains,
 					sizeof(*priv->link), GFP_KERNEL);
 	if (!priv->link)
 		return -ENOMEM;

 	for (i = 0; i < priv->num_domains; i++) {
 		priv->pd_dev[i] = dev_pm_domain_attach_by_id(&pdev->dev, i);
 		if (IS_ERR(priv->pd_dev[i])) {
 			ret = PTR_ERR(priv->pd_dev[i]);
 			goto exit_unroll_pm;
 		}
 		priv->link[i] = device_link_add(&pdev->dev, priv->pd_dev[i],
 						DL_FLAG_STATELESS |
 						DL_FLAG_PM_RUNTIME |
 						DL_FLAG_RPM_ACTIVE);
 		if (!priv->link[i]) {
 			ret = -ENOMEM;
 			dev_pm_domain_detach(priv->pd_dev[i], false);
 			goto exit_unroll_pm;
 		}
 	}

 	ret = imx_scu_get_handle(&priv->sc_ipc);
 	if (ret) {
 		dev_err(sdev->dev, "Cannot obtain SCU handle (err = %d)\n",
 			ret);
 		goto exit_unroll_pm;
 	}

 	priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
 						      PLATFORM_DEVID_NONE,
 						      pdev, sizeof(*pdev));
 	if (IS_ERR(priv->ipc_dev)) {
 		ret = PTR_ERR(priv->ipc_dev);
 		goto exit_unroll_pm;
 	}

 	priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
 	if (!priv->dsp_ipc) {
 		/* DSP IPC driver not probed yet, try later */
 		ret = -EPROBE_DEFER;
 		dev_err(sdev->dev, "Failed to get drvdata\n");
 		goto exit_pdev_unregister;
 	}

 	imx_dsp_set_data(priv->dsp_ipc, priv);
 	priv->dsp_ipc->ops = &dsp_ops;

 	/* DSP base */
 	mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (mmio) {
 		base = mmio->start;
 		size = resource_size(mmio);
 	} else {
 		dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
 		ret = -EINVAL;
 		goto exit_pdev_unregister;
 	}

 	sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
 	if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
 		dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
 			base, size);
 		ret = -ENODEV;
 		goto exit_pdev_unregister;
 	}
 	sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;

 	res_node = of_parse_phandle(np, "memory-region", 0);
 	if (!res_node) {
 		dev_err(&pdev->dev, "failed to get memory region node\n");
 		ret = -ENODEV;
 		goto exit_pdev_unregister;
 	}

 	ret = of_address_to_resource(res_node, 0, &res);
 	of_node_put(res_node);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to get reserved region address\n");
 		goto exit_pdev_unregister;
 	}

 	sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
 							  resource_size(&res));
 	if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
 		dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
 			base, size);
 		ret = -ENOMEM;
 		goto exit_pdev_unregister;
 	}
 	sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;

 	/* set default mailbox offset for FW ready message */
 	sdev->dsp_box.offset = MBOX_OFFSET;

 	return 0;

 exit_pdev_unregister:
 	platform_device_unregister(priv->ipc_dev);
 exit_unroll_pm:
 	while (--i >= 0) {
 		device_link_del(priv->link[i]);
 		dev_pm_domain_detach(priv->pd_dev[i], false);
 	}

 	return ret;
 }

 static int imx8_remove(struct snd_sof_dev *sdev)
 {
 	struct imx8_priv *priv = sdev->pdata->hw_pdata;
 	int i;

 	platform_device_unregister(priv->ipc_dev);

 	for (i = 0; i < priv->num_domains; i++) {
 		device_link_del(priv->link[i]);
 		dev_pm_domain_detach(priv->pd_dev[i], false);
 	}

 	return 0;
 }

 /* on i.MX8 there is 1 to 1 match between type and BAR idx */
 static int imx8_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 {
 	/* Only IRAM and SRAM bars are valid */
 	switch (type) {
 	case SOF_FW_BLK_TYPE_IRAM:
 	case SOF_FW_BLK_TYPE_SRAM:
 		return type;
 	default:
 		return -EINVAL;
 	}
 }

 static void imx8_ipc_msg_data(struct snd_sof_dev *sdev,
 			      struct snd_pcm_substream *substream,
 			      void *p, size_t sz)
 {
 	sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
 }

 static int imx8_ipc_pcm_params(struct snd_sof_dev *sdev,
 			       struct snd_pcm_substream *substream,
 			       const struct sof_ipc_pcm_params_reply *reply)
 {
 	return 0;
 }

 static struct snd_soc_dai_driver imx8_dai[] = {
 {
 	.name = "esai0",
 	.playback = {
 		.channels_min = 1,
 		.channels_max = 8,
 	},
 	.capture = {
 		.channels_min = 1,
 		.channels_max = 8,
 	},
 },
 {
 	.name = "sai1",
 	.playback = {
 		.channels_min = 1,
 		.channels_max = 32,
 	},
 	.capture = {
 		.channels_min = 1,
 		.channels_max = 32,
 	},
 },
 };

 /* i.MX8 ops */
 struct snd_sof_dsp_ops sof_imx8_ops = {
 	/* probe and remove */
 	.probe		= imx8_probe,
 	.remove		= imx8_remove,
 	/* DSP core boot */
 	.run		= imx8_run,

 	/* Block IO */
 	.block_read	= sof_block_read,
 	.block_write	= sof_block_write,

 	/* Module IO */
 	.read64	= sof_io_read64,

 	/* ipc */
 	.send_msg	= imx8_send_msg,
 	.fw_ready	= sof_fw_ready,
 	.get_mailbox_offset	= imx8_get_mailbox_offset,
 	.get_window_offset	= imx8_get_window_offset,

 	.ipc_msg_data	= imx8_ipc_msg_data,
 	.ipc_pcm_params	= imx8_ipc_pcm_params,

 	/* module loading */
 	.load_module	= snd_sof_parse_module_memcpy,
 	.get_bar_index	= imx8_get_bar_index,
 	/* firmware loading */
 	.load_firmware	= snd_sof_load_firmware_memcpy,

 	/* Debug information */
 	.dbg_dump = imx8_dump,

 	/* Firmware ops */
 	.arch_ops = &sof_xtensa_arch_ops,

 	/* DAI drivers */
 	.drv = imx8_dai,
 	.num_drv = ARRAY_SIZE(imx8_dai),

 	/* ALSA HW info flags */
 	.hw_info =	SNDRV_PCM_INFO_MMAP |
 			SNDRV_PCM_INFO_MMAP_VALID |
 			SNDRV_PCM_INFO_INTERLEAVED |
 			SNDRV_PCM_INFO_PAUSE |
 			SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
 };
 EXPORT_SYMBOL(sof_imx8_ops);

 /* i.MX8X ops */
 struct snd_sof_dsp_ops sof_imx8x_ops = {
 	/* probe and remove */
 	.probe		= imx8_probe,
 	.remove		= imx8_remove,
 	/* DSP core boot */
 	.run		= imx8x_run,

 	/* Block IO */
 	.block_read	= sof_block_read,
 	.block_write	= sof_block_write,

 	/* Module IO */
 	.read64	= sof_io_read64,

 	/* ipc */
 	.send_msg	= imx8_send_msg,
 	.fw_ready	= sof_fw_ready,
 	.get_mailbox_offset	= imx8_get_mailbox_offset,
 	.get_window_offset	= imx8_get_window_offset,

 	.ipc_msg_data	= imx8_ipc_msg_data,
 	.ipc_pcm_params	= imx8_ipc_pcm_params,

 	/* module loading */
 	.load_module	= snd_sof_parse_module_memcpy,
 	.get_bar_index	= imx8_get_bar_index,
 	/* firmware loading */
 	.load_firmware	= snd_sof_load_firmware_memcpy,

 	/* Debug information */
 	.dbg_dump = imx8_dump,

 	/* Firmware ops */
 	.arch_ops = &sof_xtensa_arch_ops,

 	/* DAI drivers */
 	.drv = imx8_dai,
 	.num_drv = ARRAY_SIZE(imx8_dai),

 	/* ALSA HW info flags */
 	.hw_info =	SNDRV_PCM_INFO_MMAP |
 			SNDRV_PCM_INFO_MMAP_VALID |
 			SNDRV_PCM_INFO_INTERLEAVED |
 			SNDRV_PCM_INFO_PAUSE |
 			SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
 };
 EXPORT_SYMBOL(sof_imx8x_ops);

 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
 MODULE_LICENSE("Dual BSD/GPL");
	// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
	//
	// Copyright 2019 NXP
	//
	// Author: Daniel Baluta <daniel.baluta@nxp.com>
	//
	// Hardware interface for audio DSP on i.MX8

	#include <linux/firmware.h>
	#include <linux/of_platform.h>
	#include <linux/of_address.h>
	#include <linux/of_irq.h>
	#include <linux/pm_domain.h>

	#include <linux/module.h>
	#include <sound/sof.h>
	#include <sound/sof/xtensa.h>
	#include <linux/firmware/imx/ipc.h>
	#include <linux/firmware/imx/dsp.h>

	#include <linux/firmware/imx/svc/misc.h>
	#include <dt-bindings/firmware/imx/rsrc.h>
	#include "../ops.h"
	#include "imx-common.h"

	/* DSP memories */
	#define IRAM_OFFSET 0x10000
	#define IRAM_SIZE (2 * 1024)
	#define DRAM0_OFFSET 0x0
	#define DRAM0_SIZE (32 * 1024)
	#define DRAM1_OFFSET 0x8000
	#define DRAM1_SIZE (32 * 1024)
	#define SYSRAM_OFFSET 0x18000
	#define SYSRAM_SIZE (256 * 1024)
	#define SYSROM_OFFSET 0x58000
	#define SYSROM_SIZE (192 * 1024)

	#define RESET_VECTOR_VADDR 0x596f8000

	#define MBOX_OFFSET 0x800000
	#define MBOX_SIZE 0x1000

	struct imx8_priv {
	struct device *dev;
	struct snd_sof_dev *sdev;

	/* DSP IPC handler */
	struct imx_dsp_ipc *dsp_ipc;
	struct platform_device *ipc_dev;

	/* System Controller IPC handler */
	struct imx_sc_ipc *sc_ipc;

	/* Power domain handling */
	int num_domains;
	struct device **pd_dev;
	struct device_link **link;

	};

	static void imx8_get_reply(struct snd_sof_dev *sdev)
	{
	struct snd_sof_ipc_msg *msg = sdev->msg;
	struct sof_ipc_reply reply;
	int ret = 0;

	if (!msg) {
	dev_warn(sdev->dev, "unexpected ipc interrupt\n");
	return;
	}

	/* get reply */
	sof_mailbox_read(sdev, sdev->host_box.offset, &reply, sizeof(reply));

	if (reply.error < 0) {
	memcpy(msg->reply_data, &reply, sizeof(reply));
	ret = reply.error;
	} else {
	/* reply has correct size? */
	if (reply.hdr.size != msg->reply_size) {
	dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n",
	msg->reply_size, reply.hdr.size);
	ret = -EINVAL;
	}

	/* read the message */
	if (msg->reply_size > 0)
	sof_mailbox_read(sdev, sdev->host_box.offset,
	msg->reply_data, msg->reply_size);
	}

	msg->reply_error = ret;
	}

	static int imx8_get_mailbox_offset(struct snd_sof_dev *sdev)
	{
	return MBOX_OFFSET;
	}

	static int imx8_get_window_offset(struct snd_sof_dev *sdev, u32 id)
	{
	return MBOX_OFFSET;
	}

	static void imx8_dsp_handle_reply(struct imx_dsp_ipc *ipc)
	{
	struct imx8_priv *priv = imx_dsp_get_data(ipc);
	unsigned long flags;

	spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
	imx8_get_reply(priv->sdev);
	snd_sof_ipc_reply(priv->sdev, 0);
	spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
	}

	static void imx8_dsp_handle_request(struct imx_dsp_ipc *ipc)
	{
	struct imx8_priv *priv = imx_dsp_get_data(ipc);
	u32 p; /* panic code */

	/* Read the message from the debug box. */
	sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p));

	/* Check to see if the message is a panic code (0x0dead**) /
	if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC)
	snd_sof_dsp_panic(priv->sdev, p);
	else
	snd_sof_ipc_msgs_rx(priv->sdev);
	}

	static struct imx_dsp_ops dsp_ops = {
	.handle_reply = imx8_dsp_handle_reply,
	.handle_request = imx8_dsp_handle_request,
	};

	static int imx8_send_msg(struct snd_sof_dev sdev, struct snd_sof_ipc_msg msg)
	{
	struct imx8_priv *priv = sdev->pdata->hw_pdata;

	sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
	msg->msg_size);
	imx_dsp_ring_doorbell(priv->dsp_ipc, 0);

	return 0;
	}

	/*
	* DSP control.
	*/
	static int imx8x_run(struct snd_sof_dev *sdev)
	{
	struct imx8_priv *dsp_priv = sdev->pdata->hw_pdata;
	int ret;

	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
	IMX_SC_C_OFS_SEL, 1);
	if (ret < 0) {
	dev_err(sdev->dev, "Error system address offset source select\n");
	return ret;
	}

	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
	IMX_SC_C_OFS_AUDIO, 0x80);
	if (ret < 0) {
	dev_err(sdev->dev, "Error system address offset of AUDIO\n");
	return ret;
	}

	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
	IMX_SC_C_OFS_PERIPH, 0x5A);
	if (ret < 0) {
	dev_err(sdev->dev, "Error system address offset of PERIPH %d\n",
	ret);
	return ret;
	}

	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
	IMX_SC_C_OFS_IRQ, 0x51);
	if (ret < 0) {
	dev_err(sdev->dev, "Error system address offset of IRQ\n");
	return ret;
	}

	imx_sc_pm_cpu_start(dsp_priv->sc_ipc, IMX_SC_R_DSP, true,
	RESET_VECTOR_VADDR);

	return 0;
	}

	static int imx8_run(struct snd_sof_dev *sdev)
	{
	struct imx8_priv *dsp_priv = sdev->pdata->hw_pdata;
	int ret;

	ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
	IMX_SC_C_OFS_SEL, 0);
	if (ret < 0) {
	dev_err(sdev->dev, "Error system address offset source select\n");
	return ret;
	}

	imx_sc_pm_cpu_start(dsp_priv->sc_ipc, IMX_SC_R_DSP, true,
	RESET_VECTOR_VADDR);

	return 0;
	}

	static int imx8_probe(struct snd_sof_dev *sdev)
	{
	struct platform_device *pdev =
	container_of(sdev->dev, struct platform_device, dev);
	struct device_node *np = pdev->dev.of_node;
	struct device_node *res_node;
	struct resource *mmio;
	struct imx8_priv *priv;
	struct resource res;
	u32 base, size;
	int ret = 0;
	int i;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	sdev->pdata->hw_pdata = priv;
	priv->dev = sdev->dev;
	priv->sdev = sdev;

	/* power up device associated power domains */
	priv->num_domains = of_count_phandle_with_args(np, "power-domains",
	"#power-domain-cells");
	if (priv->num_domains < 0) {
	dev_err(sdev->dev, "no power-domains property in %pOF\n", np);
	return priv->num_domains;
	}

	priv->pd_dev = devm_kmalloc_array(&pdev->dev, priv->num_domains,
	sizeof(*priv->pd_dev), GFP_KERNEL);
	if (!priv->pd_dev)
	return -ENOMEM;

	priv->link = devm_kmalloc_array(&pdev->dev, priv->num_domains,
	sizeof(*priv->link), GFP_KERNEL);
	if (!priv->link)
	return -ENOMEM;

	for (i = 0; i < priv->num_domains; i++) {
	priv->pd_dev[i] = dev_pm_domain_attach_by_id(&pdev->dev, i);
	if (IS_ERR(priv->pd_dev[i])) {
	ret = PTR_ERR(priv->pd_dev[i]);
	goto exit_unroll_pm;
	}
	priv->link[i] = device_link_add(&pdev->dev, priv->pd_dev[i],
	DL_FLAG_STATELESS \|
	DL_FLAG_PM_RUNTIME \|
	DL_FLAG_RPM_ACTIVE);
	if (!priv->link[i]) {
	ret = -ENOMEM;
	dev_pm_domain_detach(priv->pd_dev[i], false);
	goto exit_unroll_pm;
	}
	}

	ret = imx_scu_get_handle(&priv->sc_ipc);
	if (ret) {
	dev_err(sdev->dev, "Cannot obtain SCU handle (err = %d)\n",
	ret);
	goto exit_unroll_pm;
	}

	priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
	PLATFORM_DEVID_NONE,
	pdev, sizeof(*pdev));
	if (IS_ERR(priv->ipc_dev)) {
	ret = PTR_ERR(priv->ipc_dev);
	goto exit_unroll_pm;
	}

	priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
	if (!priv->dsp_ipc) {
	/* DSP IPC driver not probed yet, try later */
	ret = -EPROBE_DEFER;
	dev_err(sdev->dev, "Failed to get drvdata\n");
	goto exit_pdev_unregister;
	}

	imx_dsp_set_data(priv->dsp_ipc, priv);
	priv->dsp_ipc->ops = &dsp_ops;

	/* DSP base */
	mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (mmio) {
	base = mmio->start;
	size = resource_size(mmio);
	} else {
	dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
	ret = -EINVAL;
	goto exit_pdev_unregister;
	}

	sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
	if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
	dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
	base, size);
	ret = -ENODEV;
	goto exit_pdev_unregister;
	}
	sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;

	res_node = of_parse_phandle(np, "memory-region", 0);
	if (!res_node) {
	dev_err(&pdev->dev, "failed to get memory region node\n");
	ret = -ENODEV;
	goto exit_pdev_unregister;
	}

	ret = of_address_to_resource(res_node, 0, &res);
	of_node_put(res_node);
	if (ret) {
	dev_err(&pdev->dev, "failed to get reserved region address\n");
	goto exit_pdev_unregister;
	}

	sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
	resource_size(&res));
	if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
	dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
	base, size);
	ret = -ENOMEM;
	goto exit_pdev_unregister;
	}
	sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;

	/* set default mailbox offset for FW ready message */
	sdev->dsp_box.offset = MBOX_OFFSET;

	return 0;

	exit_pdev_unregister:
	platform_device_unregister(priv->ipc_dev);
	exit_unroll_pm:
	while (--i >= 0) {
	device_link_del(priv->link[i]);
	dev_pm_domain_detach(priv->pd_dev[i], false);
	}

	return ret;
	}

	static int imx8_remove(struct snd_sof_dev *sdev)
	{
	struct imx8_priv *priv = sdev->pdata->hw_pdata;
	int i;

	platform_device_unregister(priv->ipc_dev);

	for (i = 0; i < priv->num_domains; i++) {
	device_link_del(priv->link[i]);
	dev_pm_domain_detach(priv->pd_dev[i], false);
	}

	return 0;
	}

	/* on i.MX8 there is 1 to 1 match between type and BAR idx */
	static int imx8_get_bar_index(struct snd_sof_dev *sdev, u32 type)
	{
	/* Only IRAM and SRAM bars are valid */
	switch (type) {
	case SOF_FW_BLK_TYPE_IRAM:
	case SOF_FW_BLK_TYPE_SRAM:
	return type;
	default:
	return -EINVAL;
	}
	}

	static void imx8_ipc_msg_data(struct snd_sof_dev *sdev,
	struct snd_pcm_substream *substream,
	void *p, size_t sz)
	{
	sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
	}

	static int imx8_ipc_pcm_params(struct snd_sof_dev *sdev,
	struct snd_pcm_substream *substream,
	const struct sof_ipc_pcm_params_reply *reply)
	{
	return 0;
	}

	static struct snd_soc_dai_driver imx8_dai[] = {
	{
	.name = "esai0",
	.playback = {
	.channels_min = 1,
	.channels_max = 8,
	},
	.capture = {
	.channels_min = 1,
	.channels_max = 8,
	},
	},
	{
	.name = "sai1",
	.playback = {
	.channels_min = 1,
	.channels_max = 32,
	},
	.capture = {
	.channels_min = 1,
	.channels_max = 32,
	},
	},
	};

	/* i.MX8 ops */
	struct snd_sof_dsp_ops sof_imx8_ops = {
	/* probe and remove */
	.probe = imx8_probe,
	.remove = imx8_remove,
	/* DSP core boot */
	.run = imx8_run,

	/* Block IO */
	.block_read = sof_block_read,
	.block_write = sof_block_write,

	/* Module IO */
	.read64 = sof_io_read64,

	/* ipc */
	.send_msg = imx8_send_msg,
	.fw_ready = sof_fw_ready,
	.get_mailbox_offset = imx8_get_mailbox_offset,
	.get_window_offset = imx8_get_window_offset,

	.ipc_msg_data = imx8_ipc_msg_data,
	.ipc_pcm_params = imx8_ipc_pcm_params,

	/* module loading */
	.load_module = snd_sof_parse_module_memcpy,
	.get_bar_index = imx8_get_bar_index,
	/* firmware loading */
	.load_firmware = snd_sof_load_firmware_memcpy,

	/* Debug information */
	.dbg_dump = imx8_dump,

	/* Firmware ops */
	.arch_ops = &sof_xtensa_arch_ops,

	/* DAI drivers */
	.drv = imx8_dai,
	.num_drv = ARRAY_SIZE(imx8_dai),

	/* ALSA HW info flags */
	.hw_info = SNDRV_PCM_INFO_MMAP \|
	SNDRV_PCM_INFO_MMAP_VALID \|
	SNDRV_PCM_INFO_INTERLEAVED \|
	SNDRV_PCM_INFO_PAUSE \|
	SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
	};
	EXPORT_SYMBOL(sof_imx8_ops);

	/* i.MX8X ops */
	struct snd_sof_dsp_ops sof_imx8x_ops = {
	/* probe and remove */
	.probe = imx8_probe,
	.remove = imx8_remove,
	/* DSP core boot */
	.run = imx8x_run,

	/* Block IO */
	.block_read = sof_block_read,
	.block_write = sof_block_write,

	/* Module IO */
	.read64 = sof_io_read64,

	/* ipc */
	.send_msg = imx8_send_msg,
	.fw_ready = sof_fw_ready,
	.get_mailbox_offset = imx8_get_mailbox_offset,
	.get_window_offset = imx8_get_window_offset,

	.ipc_msg_data = imx8_ipc_msg_data,
	.ipc_pcm_params = imx8_ipc_pcm_params,

	/* module loading */
	.load_module = snd_sof_parse_module_memcpy,
	.get_bar_index = imx8_get_bar_index,
	/* firmware loading */
	.load_firmware = snd_sof_load_firmware_memcpy,

	/* Debug information */
	.dbg_dump = imx8_dump,

	/* Firmware ops */
	.arch_ops = &sof_xtensa_arch_ops,

	/* DAI drivers */
	.drv = imx8_dai,
	.num_drv = ARRAY_SIZE(imx8_dai),

	/* ALSA HW info flags */
	.hw_info = SNDRV_PCM_INFO_MMAP \|
	SNDRV_PCM_INFO_MMAP_VALID \|
	SNDRV_PCM_INFO_INTERLEAVED \|
	SNDRV_PCM_INFO_PAUSE \|
	SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
	};
	EXPORT_SYMBOL(sof_imx8x_ops);

	MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
	MODULE_LICENSE("Dual BSD/GPL");