ASoC: Intel: Remove baytrail solution

sound/soc/intel/baytrail is a niche solution which supports limited
number of BYT products - as described by
snd_soc_acpi_intel_baytrail_legacy_machines table. For a long time it's
deprecated in favor of sound/soc/intel/atom solution with SOF providing
support for some products too effectively rendering /baytrail/ redundant.
Remove deprecated code from ASoC tree.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Liam Girdwood <liam.r.girdwood@intel.com>
Link: https://lore.kernel.org/r/20201006064907.16277-5-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 0 insertions, 772 deletions

diff --git a/sound/soc/intel/baytrail/sst-baytrail-ipc.c b/sound/soc/intel/baytrail/sst-baytrail-ipc.c
deleted file mode 100644
index 34746fd871b0..000000000000
--- a/sound/soc/intel/baytrail/sst-baytrail-ipc.c
+++ /dev/null
@@ -1,772 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Baytrail SST IPC Support
- * Copyright (c) 2014, Intel Corporation.
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/device.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/firmware.h>
-#include <linux/io.h>
-#include <asm/div64.h>
-
-#include "sst-baytrail-ipc.h"
-#include "../common/sst-dsp.h"
-#include "../common/sst-dsp-priv.h"
-#include "../common/sst-ipc.h"
-
-/* IPC message timeout */
-#define IPC_TIMEOUT_MSECS	300
-#define IPC_BOOT_MSECS		200
-
-#define IPC_EMPTY_LIST_SIZE	8
-
-/* IPC header bits */
-#define IPC_HEADER_MSG_ID_MASK	0xff
-#define IPC_HEADER_MSG_ID(x)	((x) & IPC_HEADER_MSG_ID_MASK)
-#define IPC_HEADER_STR_ID_SHIFT	8
-#define IPC_HEADER_STR_ID_MASK	0x1f
-#define IPC_HEADER_STR_ID(x)	(((x) & 0x1f) << IPC_HEADER_STR_ID_SHIFT)
-#define IPC_HEADER_LARGE_SHIFT	13
-#define IPC_HEADER_LARGE(x)	(((x) & 0x1) << IPC_HEADER_LARGE_SHIFT)
-#define IPC_HEADER_DATA_SHIFT	16
-#define IPC_HEADER_DATA_MASK	0x3fff
-#define IPC_HEADER_DATA(x)	(((x) & 0x3fff) << IPC_HEADER_DATA_SHIFT)
-
-/* mask for differentiating between notification and reply message */
-#define IPC_NOTIFICATION	(0x1 << 7)
-
-/* I2L Stream config/control msgs */
-#define IPC_IA_ALLOC_STREAM	0x20
-#define IPC_IA_FREE_STREAM	0x21
-#define IPC_IA_PAUSE_STREAM	0x24
-#define IPC_IA_RESUME_STREAM	0x25
-#define IPC_IA_DROP_STREAM	0x26
-#define IPC_IA_START_STREAM	0x30
-
-/* notification messages */
-#define IPC_IA_FW_INIT_CMPLT	0x81
-#define IPC_SST_PERIOD_ELAPSED	0x97
-
-/* IPC messages between host and ADSP */
-struct sst_byt_address_info {
-	u32 addr;
-	u32 size;
-} __packed;
-
-struct sst_byt_str_type {
-	u8 codec_type;
-	u8 str_type;
-	u8 operation;
-	u8 protected_str;
-	u8 time_slots;
-	u8 reserved;
-	u16 result;
-} __packed;
-
-struct sst_byt_pcm_params {
-	u8 num_chan;
-	u8 pcm_wd_sz;
-	u8 use_offload_path;
-	u8 reserved;
-	u32 sfreq;
-	u8 channel_map[8];
-} __packed;
-
-struct sst_byt_frames_info {
-	u16 num_entries;
-	u16 rsrvd;
-	u32 frag_size;
-	struct sst_byt_address_info ring_buf_info[8];
-} __packed;
-
-struct sst_byt_alloc_params {
-	struct sst_byt_str_type str_type;
-	struct sst_byt_pcm_params pcm_params;
-	struct sst_byt_frames_info frame_info;
-} __packed;
-
-struct sst_byt_alloc_response {
-	struct sst_byt_str_type str_type;
-	u8 reserved[88];
-} __packed;
-
-struct sst_byt_start_stream_params {
-	u32 byte_offset;
-} __packed;
-
-struct sst_byt_tstamp {
-	u64 ring_buffer_counter;
-	u64 hardware_counter;
-	u64 frames_decoded;
-	u64 bytes_decoded;
-	u64 bytes_copied;
-	u32 sampling_frequency;
-	u32 channel_peak[8];
-} __packed;
-
-struct sst_byt_fw_version {
-	u8 build;
-	u8 minor;
-	u8 major;
-	u8 type;
-} __packed;
-
-struct sst_byt_fw_build_info {
-	u8 date[16];
-	u8 time[16];
-} __packed;
-
-struct sst_byt_fw_init {
-	struct sst_byt_fw_version fw_version;
-	struct sst_byt_fw_build_info build_info;
-	u16 result;
-	u8 module_id;
-	u8 debug_info;
-} __packed;
-
-struct sst_byt_stream;
-struct sst_byt;
-
-/* stream infomation */
-struct sst_byt_stream {
-	struct list_head node;
-
-	/* configuration */
-	struct sst_byt_alloc_params request;
-	struct sst_byt_alloc_response reply;
-
-	/* runtime info */
-	struct sst_byt *byt;
-	int str_id;
-	bool commited;
-	bool running;
-
-	/* driver callback */
-	u32 (*notify_position)(struct sst_byt_stream *stream, void *data);
-	void *pdata;
-};
-
-/* SST Baytrail IPC data */
-struct sst_byt {
-	struct device *dev;
-	struct sst_dsp *dsp;
-
-	/* stream */
-	struct list_head stream_list;
-
-	/* boot */
-	wait_queue_head_t boot_wait;
-	bool boot_complete;
-	struct sst_fw *fw;
-
-	/* IPC messaging */
-	struct sst_generic_ipc ipc;
-};
-
-static inline u64 sst_byt_header(int msg_id, int data, bool large, int str_id)
-{
-	return IPC_HEADER_MSG_ID(msg_id) | IPC_HEADER_STR_ID(str_id) |
-	       IPC_HEADER_LARGE(large) | IPC_HEADER_DATA(data) |
-	       SST_BYT_IPCX_BUSY;
-}
-
-static inline u16 sst_byt_header_msg_id(u64 header)
-{
-	return header & IPC_HEADER_MSG_ID_MASK;
-}
-
-static inline u8 sst_byt_header_str_id(u64 header)
-{
-	return (header >> IPC_HEADER_STR_ID_SHIFT) & IPC_HEADER_STR_ID_MASK;
-}
-
-static inline u16 sst_byt_header_data(u64 header)
-{
-	return (header >> IPC_HEADER_DATA_SHIFT) & IPC_HEADER_DATA_MASK;
-}
-
-static struct sst_byt_stream *sst_byt_get_stream(struct sst_byt *byt,
-						 int stream_id)
-{
-	struct sst_byt_stream *stream;
-
-	list_for_each_entry(stream, &byt->stream_list, node) {
-		if (stream->str_id == stream_id)
-			return stream;
-	}
-
-	return NULL;
-}
-
-static void sst_byt_stream_update(struct sst_byt *byt, struct ipc_message *msg)
-{
-	struct sst_byt_stream *stream;
-	u64 header = msg->tx.header;
-	u8 stream_id = sst_byt_header_str_id(header);
-	u8 stream_msg = sst_byt_header_msg_id(header);
-
-	stream = sst_byt_get_stream(byt, stream_id);
-	if (stream == NULL)
-		return;
-
-	switch (stream_msg) {
-	case IPC_IA_DROP_STREAM:
-	case IPC_IA_PAUSE_STREAM:
-	case IPC_IA_FREE_STREAM:
-		stream->running = false;
-		break;
-	case IPC_IA_START_STREAM:
-	case IPC_IA_RESUME_STREAM:
-		stream->running = true;
-		break;
-	}
-}
-
-static int sst_byt_process_reply(struct sst_byt *byt, u64 header)
-{
-	struct ipc_message *msg;
-
-	msg = sst_ipc_reply_find_msg(&byt->ipc, header);
-	if (msg == NULL)
-		return 1;
-
-	msg->rx.header = header;
-	if (header & IPC_HEADER_LARGE(true)) {
-		msg->rx.size = sst_byt_header_data(header);
-		sst_dsp_inbox_read(byt->dsp, msg->rx.data, msg->rx.size);
-	}
-
-	/* update any stream states */
-	sst_byt_stream_update(byt, msg);
-
-	list_del(&msg->list);
-	/* wake up */
-	sst_ipc_tx_msg_reply_complete(&byt->ipc, msg);
-
-	return 1;
-}
-
-static void sst_byt_fw_ready(struct sst_byt *byt, u64 header)
-{
-	dev_dbg(byt->dev, "ipc: DSP is ready 0x%llX\n", header);
-
-	byt->boot_complete = true;
-	wake_up(&byt->boot_wait);
-}
-
-static int sst_byt_process_notification(struct sst_byt *byt,
-					unsigned long *flags)
-{
-	struct sst_dsp *sst = byt->dsp;
-	struct sst_byt_stream *stream;
-	u64 header;
-	u8 msg_id, stream_id;
-
-	header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
-	msg_id = sst_byt_header_msg_id(header);
-
-	switch (msg_id) {
-	case IPC_SST_PERIOD_ELAPSED:
-		stream_id = sst_byt_header_str_id(header);
-		stream = sst_byt_get_stream(byt, stream_id);
-		if (stream && stream->running && stream->notify_position) {
-			spin_unlock_irqrestore(&sst->spinlock, *flags);
-			stream->notify_position(stream, stream->pdata);
-			spin_lock_irqsave(&sst->spinlock, *flags);
-		}
-		break;
-	case IPC_IA_FW_INIT_CMPLT:
-		sst_byt_fw_ready(byt, header);
-		break;
-	}
-
-	return 1;
-}
-
-static irqreturn_t sst_byt_irq_thread(int irq, void *context)
-{
-	struct sst_dsp *sst = (struct sst_dsp *) context;
-	struct sst_byt *byt = sst_dsp_get_thread_context(sst);
-	struct sst_generic_ipc *ipc = &byt->ipc;
-	u64 header;
-	unsigned long flags;
-
-	spin_lock_irqsave(&sst->spinlock, flags);
-
-	header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
-	if (header & SST_BYT_IPCD_BUSY) {
-		if (header & IPC_NOTIFICATION) {
-			/* message from ADSP */
-			sst_byt_process_notification(byt, &flags);
-		} else {
-			/* reply from ADSP */
-			sst_byt_process_reply(byt, header);
-		}
-		/*
-		 * clear IPCD BUSY bit and set DONE bit. Tell DSP we have
-		 * processed the message and can accept new. Clear data part
-		 * of the header
-		 */
-		sst_dsp_shim_update_bits64_unlocked(sst, SST_IPCD,
-			SST_BYT_IPCD_DONE | SST_BYT_IPCD_BUSY |
-			IPC_HEADER_DATA(IPC_HEADER_DATA_MASK),
-			SST_BYT_IPCD_DONE);
-		/* unmask message request interrupts */
-		sst_dsp_shim_update_bits64_unlocked(sst, SST_IMRX,
-			SST_BYT_IMRX_REQUEST, 0);
-	}
-
-	spin_unlock_irqrestore(&sst->spinlock, flags);
-
-	/* continue to send any remaining messages... */
-	schedule_work(&ipc->kwork);
-
-	return IRQ_HANDLED;
-}
-
-/* stream API */
-struct sst_byt_stream *sst_byt_stream_new(struct sst_byt *byt, int id,
-	u32 (*notify_position)(struct sst_byt_stream *stream, void *data),
-	void *data)
-{
-	struct sst_byt_stream *stream;
-	struct sst_dsp *sst = byt->dsp;
-	unsigned long flags;
-
-	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
-	if (stream == NULL)
-		return NULL;
-
-	spin_lock_irqsave(&sst->spinlock, flags);
-	list_add(&stream->node, &byt->stream_list);
-	stream->notify_position = notify_position;
-	stream->pdata = data;
-	stream->byt = byt;
-	stream->str_id = id;
-	spin_unlock_irqrestore(&sst->spinlock, flags);
-
-	return stream;
-}
-
-int sst_byt_stream_set_bits(struct sst_byt *byt, struct sst_byt_stream *stream,
-			    int bits)
-{
-	stream->request.pcm_params.pcm_wd_sz = bits;
-	return 0;
-}
-
-int sst_byt_stream_set_channels(struct sst_byt *byt,
-				struct sst_byt_stream *stream, u8 channels)
-{
-	stream->request.pcm_params.num_chan = channels;
-	return 0;
-}
-
-int sst_byt_stream_set_rate(struct sst_byt *byt, struct sst_byt_stream *stream,
-			    unsigned int rate)
-{
-	stream->request.pcm_params.sfreq = rate;
-	return 0;
-}
-
-/* stream sonfiguration */
-int sst_byt_stream_type(struct sst_byt *byt, struct sst_byt_stream *stream,
-			int codec_type, int stream_type, int operation)
-{
-	stream->request.str_type.codec_type = codec_type;
-	stream->request.str_type.str_type = stream_type;
-	stream->request.str_type.operation = operation;
-	stream->request.str_type.time_slots = 0xc;
-
-	return 0;
-}
-
-int sst_byt_stream_buffer(struct sst_byt *byt, struct sst_byt_stream *stream,
-			  uint32_t buffer_addr, uint32_t buffer_size)
-{
-	stream->request.frame_info.num_entries = 1;
-	stream->request.frame_info.ring_buf_info[0].addr = buffer_addr;
-	stream->request.frame_info.ring_buf_info[0].size = buffer_size;
-	/* calculate bytes per 4 ms fragment */
-	stream->request.frame_info.frag_size =
-		stream->request.pcm_params.sfreq *
-		stream->request.pcm_params.num_chan *
-		stream->request.pcm_params.pcm_wd_sz / 8 *
-		4 / 1000;
-	return 0;
-}
-
-int sst_byt_stream_commit(struct sst_byt *byt, struct sst_byt_stream *stream)
-{
-	struct sst_ipc_message request, reply = {0};
-	int ret;
-
-	request.header = sst_byt_header(IPC_IA_ALLOC_STREAM,
-				sizeof(stream->request) + sizeof(u32),
-				true, stream->str_id);
-	request.data = &stream->request;
-	request.size = sizeof(stream->request);
-	reply.data = &stream->reply;
-	reply.size = sizeof(stream->reply);
-
-	ret = sst_ipc_tx_message_wait(&byt->ipc, request, &reply);
-	if (ret < 0) {
-		dev_err(byt->dev, "ipc: error stream commit failed\n");
-		return ret;
-	}
-
-	stream->commited = true;
-
-	return 0;
-}
-
-int sst_byt_stream_free(struct sst_byt *byt, struct sst_byt_stream *stream)
-{
-	struct sst_ipc_message request = {0};
-	int ret = 0;
-	struct sst_dsp *sst = byt->dsp;
-	unsigned long flags;
-
-	if (!stream->commited)
-		goto out;
-
-	request.header = sst_byt_header(IPC_IA_FREE_STREAM,
-			0, false, stream->str_id);
-	ret = sst_ipc_tx_message_wait(&byt->ipc, request, NULL);
-	if (ret < 0) {
-		dev_err(byt->dev, "ipc: free stream %d failed\n",
-			stream->str_id);
-		return -EAGAIN;
-	}
-
-	stream->commited = false;
-out:
-	spin_lock_irqsave(&sst->spinlock, flags);
-	list_del(&stream->node);
-	kfree(stream);
-	spin_unlock_irqrestore(&sst->spinlock, flags);
-
-	return ret;
-}
-
-static int sst_byt_stream_operations(struct sst_byt *byt, int type,
-				     int stream_id, int wait)
-{
-	struct sst_ipc_message request = {0};
-
-	request.header = sst_byt_header(type, 0, false, stream_id);
-	if (wait)
-		return sst_ipc_tx_message_wait(&byt->ipc, request, NULL);
-	else
-		return sst_ipc_tx_message_nowait(&byt->ipc, request);
-}
-
-/* stream ALSA trigger operations */
-int sst_byt_stream_start(struct sst_byt *byt, struct sst_byt_stream *stream,
-			 u32 start_offset)
-{
-	struct sst_byt_start_stream_params start_stream;
-	struct sst_ipc_message request;
-	int ret;
-
-	start_stream.byte_offset = start_offset;
-	request.header = sst_byt_header(IPC_IA_START_STREAM,
-				sizeof(start_stream) + sizeof(u32),
-				true, stream->str_id);
-	request.data = &start_stream;
-	request.size = sizeof(start_stream);
-
-	ret = sst_ipc_tx_message_nowait(&byt->ipc, request);
-	if (ret < 0)
-		dev_err(byt->dev, "ipc: error failed to start stream %d\n",
-			stream->str_id);
-
-	return ret;
-}
-
-int sst_byt_stream_stop(struct sst_byt *byt, struct sst_byt_stream *stream)
-{
-	int ret;
-
-	/* don't stop streams that are not commited */
-	if (!stream->commited)
-		return 0;
-
-	ret = sst_byt_stream_operations(byt, IPC_IA_DROP_STREAM,
-					stream->str_id, 0);
-	if (ret < 0)
-		dev_err(byt->dev, "ipc: error failed to stop stream %d\n",
-			stream->str_id);
-	return ret;
-}
-
-int sst_byt_stream_pause(struct sst_byt *byt, struct sst_byt_stream *stream)
-{
-	int ret;
-
-	ret = sst_byt_stream_operations(byt, IPC_IA_PAUSE_STREAM,
-					stream->str_id, 0);
-	if (ret < 0)
-		dev_err(byt->dev, "ipc: error failed to pause stream %d\n",
-			stream->str_id);
-
-	return ret;
-}
-
-int sst_byt_stream_resume(struct sst_byt *byt, struct sst_byt_stream *stream)
-{
-	int ret;
-
-	ret = sst_byt_stream_operations(byt, IPC_IA_RESUME_STREAM,
-					stream->str_id, 0);
-	if (ret < 0)
-		dev_err(byt->dev, "ipc: error failed to resume stream %d\n",
-			stream->str_id);
-
-	return ret;
-}
-
-int sst_byt_get_dsp_position(struct sst_byt *byt,
-			     struct sst_byt_stream *stream, int buffer_size)
-{
-	struct sst_dsp *sst = byt->dsp;
-	struct sst_byt_tstamp fw_tstamp;
-	u8 str_id = stream->str_id;
-	u32 tstamp_offset;
-
-	tstamp_offset = SST_BYT_TIMESTAMP_OFFSET + str_id * sizeof(fw_tstamp);
-	memcpy_fromio(&fw_tstamp,
-		      sst->addr.lpe + tstamp_offset, sizeof(fw_tstamp));
-
-	return do_div(fw_tstamp.ring_buffer_counter, buffer_size);
-}
-
-struct sst_dsp *sst_byt_get_dsp(struct sst_byt *byt)
-{
-	return byt->dsp;
-}
-
-static struct sst_dsp_device byt_dev = {
-	.thread = sst_byt_irq_thread,
-	.ops = &sst_byt_ops,
-};
-
-int sst_byt_dsp_suspend_late(struct device *dev, struct sst_pdata *pdata)
-{
-	struct sst_byt *byt = pdata->dsp;
-
-	dev_dbg(byt->dev, "dsp reset\n");
-	sst_dsp_reset(byt->dsp);
-	sst_ipc_drop_all(&byt->ipc);
-	dev_dbg(byt->dev, "dsp in reset\n");
-
-	dev_dbg(byt->dev, "free all blocks and unload fw\n");
-	sst_fw_unload(byt->fw);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sst_byt_dsp_suspend_late);
-
-int sst_byt_dsp_boot(struct device *dev, struct sst_pdata *pdata)
-{
-	struct sst_byt *byt = pdata->dsp;
-	int ret;
-
-	dev_dbg(byt->dev, "reload dsp fw\n");
-
-	sst_dsp_reset(byt->dsp);
-
-	ret = sst_fw_reload(byt->fw);
-	if (ret <  0) {
-		dev_err(dev, "error: failed to reload firmware\n");
-		return ret;
-	}
-
-	/* wait for DSP boot completion */
-	byt->boot_complete = false;
-	sst_dsp_boot(byt->dsp);
-	dev_dbg(byt->dev, "dsp booting...\n");
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sst_byt_dsp_boot);
-
-int sst_byt_dsp_wait_for_ready(struct device *dev, struct sst_pdata *pdata)
-{
-	struct sst_byt *byt = pdata->dsp;
-	int err;
-
-	dev_dbg(byt->dev, "wait for dsp reboot\n");
-
-	err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
-				 msecs_to_jiffies(IPC_BOOT_MSECS));
-	if (err == 0) {
-		dev_err(byt->dev, "ipc: error DSP boot timeout\n");
-		return -EIO;
-	}
-
-	dev_dbg(byt->dev, "dsp rebooted\n");
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sst_byt_dsp_wait_for_ready);
-
-static void byt_tx_msg(struct sst_generic_ipc *ipc, struct ipc_message *msg)
-{
-	if (msg->tx.header & IPC_HEADER_LARGE(true))
-		sst_dsp_outbox_write(ipc->dsp, msg->tx.data, msg->tx.size);
-
-	sst_dsp_shim_write64_unlocked(ipc->dsp, SST_IPCX, msg->tx.header);
-}
-
-static void byt_shim_dbg(struct sst_generic_ipc *ipc, const char *text)
-{
-	struct sst_dsp *sst = ipc->dsp;
-	u64 isr, ipcd, imrx, ipcx;
-
-	ipcx = sst_dsp_shim_read64_unlocked(sst, SST_IPCX);
-	isr = sst_dsp_shim_read64_unlocked(sst, SST_ISRX);
-	ipcd = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
-	imrx = sst_dsp_shim_read64_unlocked(sst, SST_IMRX);
-
-	dev_err(ipc->dev,
-		"ipc: --%s-- ipcx 0x%llx isr 0x%llx ipcd 0x%llx imrx 0x%llx\n",
-		text, ipcx, isr, ipcd, imrx);
-}
-
-static void byt_tx_data_copy(struct ipc_message *msg, char *tx_data,
-	size_t tx_size)
-{
-	/* msg content = lower 32-bit of the header + data */
-	*(u32 *)msg->tx.data = (u32)(msg->tx.header & (u32)-1);
-	memcpy(msg->tx.data + sizeof(u32), tx_data, tx_size);
-	msg->tx.size += sizeof(u32);
-}
-
-static u64 byt_reply_msg_match(u64 header, u64 *mask)
-{
-	/* match reply to message sent based on msg and stream IDs */
-	*mask = IPC_HEADER_MSG_ID_MASK |
-	       IPC_HEADER_STR_ID_MASK << IPC_HEADER_STR_ID_SHIFT;
-	header &= *mask;
-
-	return header;
-}
-
-static bool byt_is_dsp_busy(struct sst_dsp *dsp)
-{
-	u64 ipcx;
-
-	ipcx = sst_dsp_shim_read64_unlocked(dsp, SST_IPCX);
-	return (ipcx & (SST_BYT_IPCX_BUSY | SST_BYT_IPCX_DONE));
-}
-
-int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata)
-{
-	struct sst_byt *byt;
-	struct sst_generic_ipc *ipc;
-	struct sst_fw *byt_sst_fw;
-	struct sst_byt_fw_init init;
-	int err;
-
-	dev_dbg(dev, "initialising Byt DSP IPC\n");
-
-	byt = devm_kzalloc(dev, sizeof(*byt), GFP_KERNEL);
-	if (byt == NULL)
-		return -ENOMEM;
-
-	byt->dev = dev;
-
-	ipc = &byt->ipc;
-	ipc->dev = dev;
-	ipc->ops.tx_msg = byt_tx_msg;
-	ipc->ops.shim_dbg = byt_shim_dbg;
-	ipc->ops.tx_data_copy = byt_tx_data_copy;
-	ipc->ops.reply_msg_match = byt_reply_msg_match;
-	ipc->ops.is_dsp_busy = byt_is_dsp_busy;
-	ipc->tx_data_max_size = IPC_MAX_MAILBOX_BYTES;
-	ipc->rx_data_max_size = IPC_MAX_MAILBOX_BYTES;
-
-	err = sst_ipc_init(ipc);
-	if (err != 0)
-		goto ipc_init_err;
-
-	INIT_LIST_HEAD(&byt->stream_list);
-	init_waitqueue_head(&byt->boot_wait);
-	byt_dev.thread_context = byt;
-
-	/* init SST shim */
-	byt->dsp = sst_dsp_new(dev, &byt_dev, pdata);
-	if (byt->dsp == NULL) {
-		err = -ENODEV;
-		goto dsp_new_err;
-	}
-
-	ipc->dsp = byt->dsp;
-
-	/* keep the DSP in reset state for base FW loading */
-	sst_dsp_reset(byt->dsp);
-
-	byt_sst_fw = sst_fw_new(byt->dsp, pdata->fw, byt);
-	if (byt_sst_fw  == NULL) {
-		err = -ENODEV;
-		dev_err(dev, "error: failed to load firmware\n");
-		goto fw_err;
-	}
-
-	/* wait for DSP boot completion */
-	sst_dsp_boot(byt->dsp);
-	err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
-				 msecs_to_jiffies(IPC_BOOT_MSECS));
-	if (err == 0) {
-		err = -EIO;
-		dev_err(byt->dev, "ipc: error DSP boot timeout\n");
-		goto boot_err;
-	}
-
-	/* show firmware information */
-	sst_dsp_inbox_read(byt->dsp, &init, sizeof(init));
-	dev_info(byt->dev, "FW version: %02x.%02x.%02x.%02x\n",
-		 init.fw_version.major, init.fw_version.minor,
-		 init.fw_version.build, init.fw_version.type);
-	dev_info(byt->dev, "Build type: %x\n", init.fw_version.type);
-	dev_info(byt->dev, "Build date: %s %s\n",
-		 init.build_info.date, init.build_info.time);
-
-	pdata->dsp = byt;
-	byt->fw = byt_sst_fw;
-
-	return 0;
-
-boot_err:
-	sst_dsp_reset(byt->dsp);
-	sst_fw_free(byt_sst_fw);
-fw_err:
-	sst_dsp_free(byt->dsp);
-dsp_new_err:
-	sst_ipc_fini(ipc);
-ipc_init_err:
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(sst_byt_dsp_init);
-
-void sst_byt_dsp_free(struct device *dev, struct sst_pdata *pdata)
-{
-	struct sst_byt *byt = pdata->dsp;
-
-	sst_dsp_reset(byt->dsp);
-	sst_fw_free_all(byt->dsp);
-	sst_dsp_free(byt->dsp);
-	sst_ipc_fini(&byt->ipc);
-}
-EXPORT_SYMBOL_GPL(sst_byt_dsp_free);