diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 22b57bc..cf68557 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -229,6 +229,58 @@ static const char *wm_adsp_fw_text[WM_ADSP_NUM_FW] = {
 	[WM_ADSP_FW_MISC] =     "Misc",
 };
 
+struct wm_adsp_system_config_xm_hdr {
+	__be32 sys_enable;
+	__be32 fw_id;
+	__be32 fw_rev;
+	__be32 boot_status;
+	__be32 watchdog;
+	__be32 dma_buffer_size;
+	__be32 rdma[6];
+	__be32 wdma[8];
+	__be32 build_job_name[3];
+	__be32 build_job_number;
+};
+
+struct wm_adsp_alg_xm_struct {
+	__be32 magic;
+	__be32 smoothing;
+	__be32 threshold;
+	__be32 host_buf_ptr;
+	__be32 start_seq;
+	__be32 high_water_mark;
+	__be32 low_water_mark;
+	__be64 smoothed_power;
+};
+
+struct wm_adsp_buffer {
+	__be32 X_buf_base;		/* XM base addr of first X area */
+	__be32 X_buf_size;		/* Size of 1st X area in words */
+	__be32 X_buf_base2;		/* XM base addr of 2nd X area */
+	__be32 X_buf_brk;		/* Total X size in words */
+	__be32 Y_buf_base;		/* YM base addr of Y area */
+	__be32 wrap;			/* Total size X and Y in words */
+	__be32 high_water_mark;		/* Point at which IRQ is asserted */
+	__be32 irq_count;		/* bits 1-31 count IRQ assertions */
+	__be32 irq_ack;			/* acked IRQ count, bit 0 enables IRQ */
+	__be32 next_write_index;	/* word index of next write */
+	__be32 next_read_index;		/* word index of next read */
+	__be32 error;			/* error if any */
+	__be32 oldest_block_index;	/* word index of oldest surviving */
+	__be32 requested_rewind;	/* how many blocks rewind was done */
+	__be32 reserved_space;		/* internal */
+	__be32 min_free;		/* min free space since stream start */
+	__be32 blocks_written[2];	/* total blocks written (64 bit) */
+	__be32 words_written[2];	/* total words written (64 bit) */
+};
+
+struct wm_adsp_compr_buf {
+	struct wm_adsp *dsp;
+
+	struct wm_adsp_buffer_region *regions;
+	u32 host_buf_ptr;
+};
+
 struct wm_adsp_compr {
 	struct wm_adsp *dsp;
 
@@ -243,9 +295,53 @@ struct wm_adsp_compr {
 #define WM_ADSP_MIN_FRAGMENT_SIZE      (64 * WM_ADSP_DATA_WORD_SIZE)
 #define WM_ADSP_MAX_FRAGMENT_SIZE      (4096 * WM_ADSP_DATA_WORD_SIZE)
 
+#define WM_ADSP_ALG_XM_STRUCT_MAGIC    0x49aec7
+
+#define HOST_BUFFER_FIELD(field) \
+	(offsetof(struct wm_adsp_buffer, field) / sizeof(__be32))
+
+#define ALG_XM_FIELD(field) \
+	(offsetof(struct wm_adsp_alg_xm_struct, field) / sizeof(__be32))
+
+static int wm_adsp_buffer_init(struct wm_adsp *dsp);
+static int wm_adsp_buffer_free(struct wm_adsp *dsp);
+
+struct wm_adsp_buffer_region {
+	unsigned int offset;
+	unsigned int cumulative_size;
+	unsigned int mem_type;
+	unsigned int base_addr;
+};
+
+struct wm_adsp_buffer_region_def {
+	unsigned int mem_type;
+	unsigned int base_offset;
+	unsigned int size_offset;
+};
+
+static struct wm_adsp_buffer_region_def ez2control_regions[] = {
+	{
+		.mem_type = WMFW_ADSP2_XM,
+		.base_offset = HOST_BUFFER_FIELD(X_buf_base),
+		.size_offset = HOST_BUFFER_FIELD(X_buf_size),
+	},
+	{
+		.mem_type = WMFW_ADSP2_XM,
+		.base_offset = HOST_BUFFER_FIELD(X_buf_base2),
+		.size_offset = HOST_BUFFER_FIELD(X_buf_brk),
+	},
+	{
+		.mem_type = WMFW_ADSP2_YM,
+		.base_offset = HOST_BUFFER_FIELD(Y_buf_base),
+		.size_offset = HOST_BUFFER_FIELD(wrap),
+	},
+};
+
 struct wm_adsp_fw_caps {
 	u32 id;
 	struct snd_codec_desc desc;
+	int num_regions;
+	struct wm_adsp_buffer_region_def *region_defs;
 };
 
 static const struct wm_adsp_fw_caps ez2control_caps[] = {
@@ -257,6 +353,8 @@ static const struct wm_adsp_fw_caps ez2control_caps[] = {
 			.num_sample_rates = 1,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
 		},
+		.num_regions = ARRAY_SIZE(ez2control_regions),
+		.region_defs = ez2control_regions,
 	},
 };
 
@@ -2120,6 +2218,10 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w,
 					 ADSP2_CORE_ENA | ADSP2_START);
 		if (ret != 0)
 			goto err;
+
+		if (wm_adsp_fw[dsp->fw].num_caps != 0)
+			ret = wm_adsp_buffer_init(dsp);
+
 		break;
 
 	case SND_SOC_DAPM_PRE_PMD:
@@ -2154,6 +2256,9 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w,
 			kfree(alg_region);
 		}
 
+		if (wm_adsp_fw[dsp->fw].num_caps != 0)
+			wm_adsp_buffer_free(dsp);
+
 		mutex_unlock(&dsp->pwr_lock);
 
 		adsp_dbg(dsp, "Shutdown complete\n");
@@ -2363,4 +2468,191 @@ int wm_adsp_compr_get_caps(struct snd_compr_stream *stream,
 }
 EXPORT_SYMBOL_GPL(wm_adsp_compr_get_caps);
 
+static int wm_adsp_read_data_block(struct wm_adsp *dsp, int mem_type,
+				   unsigned int mem_addr,
+				   unsigned int num_words, u32 *data)
+{
+	struct wm_adsp_region const *mem = wm_adsp_find_region(dsp, mem_type);
+	unsigned int i, reg;
+	int ret;
+
+	if (!mem)
+		return -EINVAL;
+
+	reg = wm_adsp_region_to_reg(mem, mem_addr);
+
+	ret = regmap_raw_read(dsp->regmap, reg, data,
+			      sizeof(*data) * num_words);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < num_words; ++i)
+		data[i] = be32_to_cpu(data[i]) & 0x00ffffffu;
+
+	return 0;
+}
+
+static inline int wm_adsp_read_data_word(struct wm_adsp *dsp, int mem_type,
+					 unsigned int mem_addr, u32 *data)
+{
+	return wm_adsp_read_data_block(dsp, mem_type, mem_addr, 1, data);
+}
+
+static int wm_adsp_write_data_word(struct wm_adsp *dsp, int mem_type,
+				   unsigned int mem_addr, u32 data)
+{
+	struct wm_adsp_region const *mem = wm_adsp_find_region(dsp, mem_type);
+	unsigned int reg;
+
+	if (!mem)
+		return -EINVAL;
+
+	reg = wm_adsp_region_to_reg(mem, mem_addr);
+
+	data = cpu_to_be32(data & 0x00ffffffu);
+
+	return regmap_raw_write(dsp->regmap, reg, &data, sizeof(data));
+}
+
+static inline int wm_adsp_buffer_read(struct wm_adsp_compr_buf *buf,
+				      unsigned int field_offset, u32 *data)
+{
+	return wm_adsp_read_data_word(buf->dsp, WMFW_ADSP2_XM,
+				      buf->host_buf_ptr + field_offset, data);
+}
+
+static inline int wm_adsp_buffer_write(struct wm_adsp_compr_buf *buf,
+				       unsigned int field_offset, u32 data)
+{
+	return wm_adsp_write_data_word(buf->dsp, WMFW_ADSP2_XM,
+				       buf->host_buf_ptr + field_offset, data);
+}
+
+static int wm_adsp_buffer_locate(struct wm_adsp_compr_buf *buf)
+{
+	struct wm_adsp_alg_region *alg_region;
+	struct wm_adsp *dsp = buf->dsp;
+	u32 xmalg, addr, magic;
+	int i, ret;
+
+	alg_region = wm_adsp_find_alg_region(dsp, WMFW_ADSP2_XM, dsp->fw_id);
+	xmalg = sizeof(struct wm_adsp_system_config_xm_hdr) / sizeof(__be32);
+
+	addr = alg_region->base + xmalg + ALG_XM_FIELD(magic);
+	ret = wm_adsp_read_data_word(dsp, WMFW_ADSP2_XM, addr, &magic);
+	if (ret < 0)
+		return ret;
+
+	if (magic != WM_ADSP_ALG_XM_STRUCT_MAGIC)
+		return -EINVAL;
+
+	addr = alg_region->base + xmalg + ALG_XM_FIELD(host_buf_ptr);
+	for (i = 0; i < 5; ++i) {
+		ret = wm_adsp_read_data_word(dsp, WMFW_ADSP2_XM, addr,
+					     &buf->host_buf_ptr);
+		if (ret < 0)
+			return ret;
+
+		if (buf->host_buf_ptr)
+			break;
+
+		usleep_range(10000, 15000);
+	}
+
+	if (!buf->host_buf_ptr)
+		return -EIO;
+
+	adsp_dbg(dsp, "host_buf_ptr=%x\n", buf->host_buf_ptr);
+
+	return 0;
+}
+
+static int wm_adsp_buffer_populate(struct wm_adsp_compr_buf *buf)
+{
+	const struct wm_adsp_fw_caps *caps = wm_adsp_fw[buf->dsp->fw].caps;
+	struct wm_adsp_buffer_region *region;
+	u32 offset = 0;
+	int i, ret;
+
+	for (i = 0; i < caps->num_regions; ++i) {
+		region = &buf->regions[i];
+
+		region->offset = offset;
+		region->mem_type = caps->region_defs[i].mem_type;
+
+		ret = wm_adsp_buffer_read(buf, caps->region_defs[i].base_offset,
+					  &region->base_addr);
+		if (ret < 0)
+			return ret;
+
+		ret = wm_adsp_buffer_read(buf, caps->region_defs[i].size_offset,
+					  &offset);
+		if (ret < 0)
+			return ret;
+
+		region->cumulative_size = offset;
+
+		adsp_dbg(buf->dsp,
+			 "region=%d type=%d base=%04x off=%04x size=%04x\n",
+			 i, region->mem_type, region->base_addr,
+			 region->offset, region->cumulative_size);
+	}
+
+	return 0;
+}
+
+static int wm_adsp_buffer_init(struct wm_adsp *dsp)
+{
+	struct wm_adsp_compr_buf *buf;
+	unsigned int size;
+	int ret;
+
+	buf = kzalloc(sizeof(*buf), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	buf->dsp = dsp;
+
+	ret = wm_adsp_buffer_locate(buf);
+	if (ret < 0) {
+		adsp_err(dsp, "Failed to acquire host buffer: %d\n", ret);
+		goto err_buffer;
+	}
+
+	size = wm_adsp_fw[dsp->fw].caps->num_regions * sizeof(*buf->regions);
+	buf->regions = kzalloc(size, GFP_KERNEL);
+	if (!buf->regions) {
+		ret = -ENOMEM;
+		goto err_buffer;
+	}
+
+	ret = wm_adsp_buffer_populate(buf);
+	if (ret < 0) {
+		adsp_err(dsp, "Failed to populate host buffer: %d\n", ret);
+		goto err_regions;
+	}
+
+	dsp->buffer = buf;
+
+	return 0;
+
+err_regions:
+	kfree(buf->regions);
+err_buffer:
+	kfree(buf);
+	return ret;
+}
+
+static int wm_adsp_buffer_free(struct wm_adsp *dsp)
+{
+	if (dsp->buffer) {
+		kfree(dsp->buffer->regions);
+		kfree(dsp->buffer);
+
+		dsp->buffer = NULL;
+	}
+
+	return 0;
+}
+
 MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 33c9b52..0b2205a 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -32,6 +32,7 @@ struct wm_adsp_alg_region {
 };
 
 struct wm_adsp_compr;
+struct wm_adsp_compr_buf;
 
 struct wm_adsp {
 	const char *part;
@@ -63,6 +64,7 @@ struct wm_adsp {
 	struct work_struct boot_work;
 
 	struct wm_adsp_compr *compr;
+	struct wm_adsp_compr_buf *buffer;
 
 	struct mutex pwr_lock;
 
