Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 1865 insertions, 0 deletions

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
new file mode 100644
index 000000000..7286c9b3b
--- /dev/null
+++ b/drivers/soundwire/cadence_master.c
@@ -0,0 +1,1865 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+// Copyright(c) 2015-17 Intel Corporation.
+
+/*
+ * Cadence SoundWire Master module
+ * Used by Master driver
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm_runtime.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <linux/soundwire/sdw.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <linux/workqueue.h>
+#include "bus.h"
+#include "cadence_master.h"
+
+static int interrupt_mask;
+module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444);
+MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask");
+
+#define CDNS_MCP_CONFIG				0x0
+
+#define CDNS_MCP_CONFIG_MCMD_RETRY		GENMASK(27, 24)
+#define CDNS_MCP_CONFIG_MPREQ_DELAY		GENMASK(20, 16)
+#define CDNS_MCP_CONFIG_MMASTER			BIT(7)
+#define CDNS_MCP_CONFIG_BUS_REL			BIT(6)
+#define CDNS_MCP_CONFIG_SNIFFER			BIT(5)
+#define CDNS_MCP_CONFIG_SSPMOD			BIT(4)
+#define CDNS_MCP_CONFIG_CMD			BIT(3)
+#define CDNS_MCP_CONFIG_OP			GENMASK(2, 0)
+#define CDNS_MCP_CONFIG_OP_NORMAL		0
+
+#define CDNS_MCP_CONTROL			0x4
+
+#define CDNS_MCP_CONTROL_RST_DELAY		GENMASK(10, 8)
+#define CDNS_MCP_CONTROL_CMD_RST		BIT(7)
+#define CDNS_MCP_CONTROL_SOFT_RST		BIT(6)
+#define CDNS_MCP_CONTROL_SW_RST			BIT(5)
+#define CDNS_MCP_CONTROL_HW_RST			BIT(4)
+#define CDNS_MCP_CONTROL_CLK_PAUSE		BIT(3)
+#define CDNS_MCP_CONTROL_CLK_STOP_CLR		BIT(2)
+#define CDNS_MCP_CONTROL_CMD_ACCEPT		BIT(1)
+#define CDNS_MCP_CONTROL_BLOCK_WAKEUP		BIT(0)
+
+#define CDNS_MCP_CMDCTRL			0x8
+
+#define CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR	BIT(2)
+
+#define CDNS_MCP_SSPSTAT			0xC
+#define CDNS_MCP_FRAME_SHAPE			0x10
+#define CDNS_MCP_FRAME_SHAPE_INIT		0x14
+#define CDNS_MCP_FRAME_SHAPE_COL_MASK		GENMASK(2, 0)
+#define CDNS_MCP_FRAME_SHAPE_ROW_MASK		GENMASK(7, 3)
+
+#define CDNS_MCP_CONFIG_UPDATE			0x18
+#define CDNS_MCP_CONFIG_UPDATE_BIT		BIT(0)
+
+#define CDNS_MCP_PHYCTRL			0x1C
+#define CDNS_MCP_SSP_CTRL0			0x20
+#define CDNS_MCP_SSP_CTRL1			0x28
+#define CDNS_MCP_CLK_CTRL0			0x30
+#define CDNS_MCP_CLK_CTRL1			0x38
+#define CDNS_MCP_CLK_MCLKD_MASK		GENMASK(7, 0)
+
+#define CDNS_MCP_STAT				0x40
+
+#define CDNS_MCP_STAT_ACTIVE_BANK		BIT(20)
+#define CDNS_MCP_STAT_CLK_STOP			BIT(16)
+
+#define CDNS_MCP_INTSTAT			0x44
+#define CDNS_MCP_INTMASK			0x48
+
+#define CDNS_MCP_INT_IRQ			BIT(31)
+#define CDNS_MCP_INT_RESERVED1			GENMASK(30, 17)
+#define CDNS_MCP_INT_WAKEUP			BIT(16)
+#define CDNS_MCP_INT_SLAVE_RSVD			BIT(15)
+#define CDNS_MCP_INT_SLAVE_ALERT		BIT(14)
+#define CDNS_MCP_INT_SLAVE_ATTACH		BIT(13)
+#define CDNS_MCP_INT_SLAVE_NATTACH		BIT(12)
+#define CDNS_MCP_INT_SLAVE_MASK			GENMASK(15, 12)
+#define CDNS_MCP_INT_DPINT			BIT(11)
+#define CDNS_MCP_INT_CTRL_CLASH			BIT(10)
+#define CDNS_MCP_INT_DATA_CLASH			BIT(9)
+#define CDNS_MCP_INT_PARITY			BIT(8)
+#define CDNS_MCP_INT_CMD_ERR			BIT(7)
+#define CDNS_MCP_INT_RESERVED2			GENMASK(6, 4)
+#define CDNS_MCP_INT_RX_NE			BIT(3)
+#define CDNS_MCP_INT_RX_WL			BIT(2)
+#define CDNS_MCP_INT_TXE			BIT(1)
+#define CDNS_MCP_INT_TXF			BIT(0)
+#define CDNS_MCP_INT_RESERVED (CDNS_MCP_INT_RESERVED1 | CDNS_MCP_INT_RESERVED2)
+
+#define CDNS_MCP_INTSET				0x4C
+
+#define CDNS_MCP_SLAVE_STAT			0x50
+#define CDNS_MCP_SLAVE_STAT_MASK		GENMASK(1, 0)
+
+#define CDNS_MCP_SLAVE_INTSTAT0			0x54
+#define CDNS_MCP_SLAVE_INTSTAT1			0x58
+#define CDNS_MCP_SLAVE_INTSTAT_NPRESENT		BIT(0)
+#define CDNS_MCP_SLAVE_INTSTAT_ATTACHED		BIT(1)
+#define CDNS_MCP_SLAVE_INTSTAT_ALERT		BIT(2)
+#define CDNS_MCP_SLAVE_INTSTAT_RESERVED		BIT(3)
+#define CDNS_MCP_SLAVE_STATUS_BITS		GENMASK(3, 0)
+#define CDNS_MCP_SLAVE_STATUS_NUM		4
+
+#define CDNS_MCP_SLAVE_INTMASK0			0x5C
+#define CDNS_MCP_SLAVE_INTMASK1			0x60
+
+#define CDNS_MCP_SLAVE_INTMASK0_MASK		GENMASK(31, 0)
+#define CDNS_MCP_SLAVE_INTMASK1_MASK		GENMASK(15, 0)
+
+#define CDNS_MCP_PORT_INTSTAT			0x64
+#define CDNS_MCP_PDI_STAT			0x6C
+
+#define CDNS_MCP_FIFOLEVEL			0x78
+#define CDNS_MCP_FIFOSTAT			0x7C
+#define CDNS_MCP_RX_FIFO_AVAIL			GENMASK(5, 0)
+
+#define CDNS_MCP_CMD_BASE			0x80
+#define CDNS_MCP_RESP_BASE			0x80
+/* FIFO can hold 8 commands */
+#define CDNS_MCP_CMD_LEN			8
+#define CDNS_MCP_CMD_WORD_LEN			0x4
+
+#define CDNS_MCP_CMD_SSP_TAG			BIT(31)
+#define CDNS_MCP_CMD_COMMAND			GENMASK(30, 28)
+#define CDNS_MCP_CMD_DEV_ADDR			GENMASK(27, 24)
+#define CDNS_MCP_CMD_REG_ADDR			GENMASK(23, 8)
+#define CDNS_MCP_CMD_REG_DATA			GENMASK(7, 0)
+
+#define CDNS_MCP_CMD_READ			2
+#define CDNS_MCP_CMD_WRITE			3
+
+#define CDNS_MCP_RESP_RDATA			GENMASK(15, 8)
+#define CDNS_MCP_RESP_ACK			BIT(0)
+#define CDNS_MCP_RESP_NACK			BIT(1)
+
+#define CDNS_DP_SIZE				128
+
+#define CDNS_DPN_B0_CONFIG(n)			(0x100 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B0_CH_EN(n)			(0x104 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B0_SAMPLE_CTRL(n)		(0x108 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B0_OFFSET_CTRL(n)		(0x10C + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B0_HCTRL(n)			(0x110 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B0_ASYNC_CTRL(n)		(0x114 + CDNS_DP_SIZE * (n))
+
+#define CDNS_DPN_B1_CONFIG(n)			(0x118 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B1_CH_EN(n)			(0x11C + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B1_SAMPLE_CTRL(n)		(0x120 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B1_OFFSET_CTRL(n)		(0x124 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B1_HCTRL(n)			(0x128 + CDNS_DP_SIZE * (n))
+#define CDNS_DPN_B1_ASYNC_CTRL(n)		(0x12C + CDNS_DP_SIZE * (n))
+
+#define CDNS_DPN_CONFIG_BPM			BIT(18)
+#define CDNS_DPN_CONFIG_BGC			GENMASK(17, 16)
+#define CDNS_DPN_CONFIG_WL			GENMASK(12, 8)
+#define CDNS_DPN_CONFIG_PORT_DAT		GENMASK(3, 2)
+#define CDNS_DPN_CONFIG_PORT_FLOW		GENMASK(1, 0)
+
+#define CDNS_DPN_SAMPLE_CTRL_SI			GENMASK(15, 0)
+
+#define CDNS_DPN_OFFSET_CTRL_1			GENMASK(7, 0)
+#define CDNS_DPN_OFFSET_CTRL_2			GENMASK(15, 8)
+
+#define CDNS_DPN_HCTRL_HSTOP			GENMASK(3, 0)
+#define CDNS_DPN_HCTRL_HSTART			GENMASK(7, 4)
+#define CDNS_DPN_HCTRL_LCTRL			GENMASK(10, 8)
+
+#define CDNS_PORTCTRL				0x130
+#define CDNS_PORTCTRL_TEST_FAILED		BIT(1)
+#define CDNS_PORTCTRL_DIRN			BIT(7)
+#define CDNS_PORTCTRL_BANK_INVERT		BIT(8)
+
+#define CDNS_PORT_OFFSET			0x80
+
+#define CDNS_PDI_CONFIG(n)			(0x1100 + (n) * 16)
+
+#define CDNS_PDI_CONFIG_SOFT_RESET		BIT(24)
+#define CDNS_PDI_CONFIG_CHANNEL			GENMASK(15, 8)
+#define CDNS_PDI_CONFIG_PORT			GENMASK(4, 0)
+
+/* Driver defaults */
+#define CDNS_TX_TIMEOUT				500
+
+#define CDNS_SCP_RX_FIFOLEVEL			0x2
+
+/*
+ * register accessor helpers
+ */
+static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset)
+{
+	return readl(cdns->registers + offset);
+}
+
+static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value)
+{
+	writel(value, cdns->registers + offset);
+}
+
+static inline void cdns_updatel(struct sdw_cdns *cdns,
+				int offset, u32 mask, u32 val)
+{
+	u32 tmp;
+
+	tmp = cdns_readl(cdns, offset);
+	tmp = (tmp & ~mask) | val;
+	cdns_writel(cdns, offset, tmp);
+}
+
+static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value)
+{
+	int timeout = 10;
+	u32 reg_read;
+
+	/* Wait for bit to be set */
+	do {
+		reg_read = readl(cdns->registers + offset);
+		if ((reg_read & mask) == value)
+			return 0;
+
+		timeout--;
+		usleep_range(50, 100);
+	} while (timeout != 0);
+
+	return -ETIMEDOUT;
+}
+
+static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
+{
+	writel(value, cdns->registers + offset);
+
+	/* Wait for bit to be self cleared */
+	return cdns_set_wait(cdns, offset, value, 0);
+}
+
+/*
+ * all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL
+ * need to be confirmed with a write to MCP_CONFIG_UPDATE
+ */
+static int cdns_config_update(struct sdw_cdns *cdns)
+{
+	int ret;
+
+	if (sdw_cdns_is_clock_stop(cdns)) {
+		dev_err(cdns->dev, "Cannot program MCP_CONFIG_UPDATE in ClockStopMode\n");
+		return -EINVAL;
+	}
+
+	ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
+			     CDNS_MCP_CONFIG_UPDATE_BIT);
+	if (ret < 0)
+		dev_err(cdns->dev, "Config update timedout\n");
+
+	return ret;
+}
+
+/*
+ * debugfs
+ */
+#ifdef CONFIG_DEBUG_FS
+
+#define RD_BUF (2 * PAGE_SIZE)
+
+static ssize_t cdns_sprintf(struct sdw_cdns *cdns,
+			    char *buf, size_t pos, unsigned int reg)
+{
+	return scnprintf(buf + pos, RD_BUF - pos,
+			 "%4x\t%8x\n", reg, cdns_readl(cdns, reg));
+}
+
+static int cdns_reg_show(struct seq_file *s, void *data)
+{
+	struct sdw_cdns *cdns = s->private;
+	char *buf;
+	ssize_t ret;
+	int num_ports;
+	int i, j;
+
+	buf = kzalloc(RD_BUF, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = scnprintf(buf, RD_BUF, "Register  Value\n");
+	ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n");
+	/* 8 MCP registers */
+	for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32))
+		ret += cdns_sprintf(cdns, buf, ret, i);
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nStatus & Intr Registers\n");
+	/* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */
+	for (i = CDNS_MCP_STAT; i <=  CDNS_MCP_FIFOSTAT; i += sizeof(u32))
+		ret += cdns_sprintf(cdns, buf, ret, i);
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nSSP & Clk ctrl Registers\n");
+	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0);
+	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1);
+	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0);
+	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1);
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nDPn B0 Registers\n");
+
+	num_ports = cdns->num_ports;
+
+	for (i = 0; i < num_ports; i++) {
+		ret += scnprintf(buf + ret, RD_BUF - ret,
+				 "\nDP-%d\n", i);
+		for (j = CDNS_DPN_B0_CONFIG(i);
+		     j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32))
+			ret += cdns_sprintf(cdns, buf, ret, j);
+	}
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nDPn B1 Registers\n");
+	for (i = 0; i < num_ports; i++) {
+		ret += scnprintf(buf + ret, RD_BUF - ret,
+				 "\nDP-%d\n", i);
+
+		for (j = CDNS_DPN_B1_CONFIG(i);
+		     j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32))
+			ret += cdns_sprintf(cdns, buf, ret, j);
+	}
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nDPn Control Registers\n");
+	for (i = 0; i < num_ports; i++)
+		ret += cdns_sprintf(cdns, buf, ret,
+				CDNS_PORTCTRL + i * CDNS_PORT_OFFSET);
+
+	ret += scnprintf(buf + ret, RD_BUF - ret,
+			 "\nPDIn Config Registers\n");
+
+	/* number of PDI and ports is interchangeable */
+	for (i = 0; i < num_ports; i++)
+		ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i));
+
+	seq_printf(s, "%s", buf);
+	kfree(buf);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(cdns_reg);
+
+static int cdns_hw_reset(void *data, u64 value)
+{
+	struct sdw_cdns *cdns = data;
+	int ret;
+
+	if (value != 1)
+		return -EINVAL;
+
+	/* Userspace changed the hardware state behind the kernel's back */
+	add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+	ret = sdw_cdns_exit_reset(cdns);
+
+	dev_dbg(cdns->dev, "link hw_reset done: %d\n", ret);
+
+	return ret;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_hw_reset_fops, NULL, cdns_hw_reset, "%llu\n");
+
+static int cdns_parity_error_injection(void *data, u64 value)
+{
+	struct sdw_cdns *cdns = data;
+	struct sdw_bus *bus;
+	int ret;
+
+	if (value != 1)
+		return -EINVAL;
+
+	bus = &cdns->bus;
+
+	/*
+	 * Resume Master device. If this results in a bus reset, the
+	 * Slave devices will re-attach and be re-enumerated.
+	 */
+	ret = pm_runtime_resume_and_get(bus->dev);
+	if (ret < 0 && ret != -EACCES) {
+		dev_err_ratelimited(cdns->dev,
+				    "pm_runtime_resume_and_get failed in %s, ret %d\n",
+				    __func__, ret);
+		return ret;
+	}
+
+	/*
+	 * wait long enough for Slave(s) to be in steady state. This
+	 * does not need to be super precise.
+	 */
+	msleep(200);
+
+	/*
+	 * Take the bus lock here to make sure that any bus transactions
+	 * will be queued while we inject a parity error on a dummy read
+	 */
+	mutex_lock(&bus->bus_lock);
+
+	/* program hardware to inject parity error */
+	cdns_updatel(cdns, CDNS_MCP_CMDCTRL,
+		     CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR,
+		     CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR);
+
+	/* commit changes */
+	cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
+		     CDNS_MCP_CONFIG_UPDATE_BIT,
+		     CDNS_MCP_CONFIG_UPDATE_BIT);
+
+	/* do a broadcast dummy read to avoid bus clashes */
+	ret = sdw_bread_no_pm_unlocked(&cdns->bus, 0xf, SDW_SCP_DEVID_0);
+	dev_info(cdns->dev, "parity error injection, read: %d\n", ret);
+
+	/* program hardware to disable parity error */
+	cdns_updatel(cdns, CDNS_MCP_CMDCTRL,
+		     CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR,
+		     0);
+
+	/* commit changes */
+	cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
+		     CDNS_MCP_CONFIG_UPDATE_BIT,
+		     CDNS_MCP_CONFIG_UPDATE_BIT);
+
+	/* Continue bus operation with parity error injection disabled */
+	mutex_unlock(&bus->bus_lock);
+
+	/* Userspace changed the hardware state behind the kernel's back */
+	add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+	/*
+	 * allow Master device to enter pm_runtime suspend. This may
+	 * also result in Slave devices suspending.
+	 */
+	pm_runtime_mark_last_busy(bus->dev);
+	pm_runtime_put_autosuspend(bus->dev);
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_parity_error_fops, NULL,
+			 cdns_parity_error_injection, "%llu\n");
+
+static int cdns_set_pdi_loopback_source(void *data, u64 value)
+{
+	struct sdw_cdns *cdns = data;
+	unsigned int pdi_out_num = cdns->pcm.num_bd + cdns->pcm.num_out;
+
+	if (value > pdi_out_num)
+		return -EINVAL;
+
+	/* Userspace changed the hardware state behind the kernel's back */
+	add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+	cdns->pdi_loopback_source = value;
+
+	return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_pdi_loopback_source_fops, NULL, cdns_set_pdi_loopback_source, "%llu\n");
+
+static int cdns_set_pdi_loopback_target(void *data, u64 value)
+{
+	struct sdw_cdns *cdns = data;
+	unsigned int pdi_in_num = cdns->pcm.num_bd + cdns->pcm.num_in;
+
+	if (value > pdi_in_num)
+		return -EINVAL;
+
+	/* Userspace changed the hardware state behind the kernel's back */
+	add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+	cdns->pdi_loopback_target = value;
+
+	return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_pdi_loopback_target_fops, NULL, cdns_set_pdi_loopback_target, "%llu\n");
+
+/**
+ * sdw_cdns_debugfs_init() - Cadence debugfs init
+ * @cdns: Cadence instance
+ * @root: debugfs root
+ */
+void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root)
+{
+	debugfs_create_file("cdns-registers", 0400, root, cdns, &cdns_reg_fops);
+
+	debugfs_create_file("cdns-hw-reset", 0200, root, cdns,
+			    &cdns_hw_reset_fops);
+
+	debugfs_create_file("cdns-parity-error-injection", 0200, root, cdns,
+			    &cdns_parity_error_fops);
+
+	cdns->pdi_loopback_source = -1;
+	cdns->pdi_loopback_target = -1;
+
+	debugfs_create_file("cdns-pdi-loopback-source", 0200, root, cdns,
+			    &cdns_pdi_loopback_source_fops);
+
+	debugfs_create_file("cdns-pdi-loopback-target", 0200, root, cdns,
+			    &cdns_pdi_loopback_target_fops);
+
+}
+EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init);
+
+#endif /* CONFIG_DEBUG_FS */
+
+/*
+ * IO Calls
+ */
+static enum sdw_command_response
+cdns_fill_msg_resp(struct sdw_cdns *cdns,
+		   struct sdw_msg *msg, int count, int offset)
+{
+	int nack = 0, no_ack = 0;
+	int i;
+
+	/* check message response */
+	for (i = 0; i < count; i++) {
+		if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
+			no_ack = 1;
+			dev_vdbg(cdns->dev, "Msg Ack not received, cmd %d\n", i);
+		}
+		if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
+			nack = 1;
+			dev_err_ratelimited(cdns->dev, "Msg NACK received, cmd %d\n", i);
+		}
+	}
+
+	if (nack) {
+		dev_err_ratelimited(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num);
+		return SDW_CMD_FAIL;
+	}
+
+	if (no_ack) {
+		dev_dbg_ratelimited(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num);
+		return SDW_CMD_IGNORED;
+	}
+
+	if (msg->flags == SDW_MSG_FLAG_READ) {
+		/* fill response */
+		for (i = 0; i < count; i++)
+			msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA,
+							 cdns->response_buf[i]);
+	}
+
+	return SDW_CMD_OK;
+}
+
+static void cdns_read_response(struct sdw_cdns *cdns)
+{
+	u32 num_resp, cmd_base;
+	int i;
+
+	/* RX_FIFO_AVAIL can be 2 entries more than the FIFO size */
+	BUILD_BUG_ON(ARRAY_SIZE(cdns->response_buf) < CDNS_MCP_CMD_LEN + 2);
+
+	num_resp = cdns_readl(cdns, CDNS_MCP_FIFOSTAT);
+	num_resp &= CDNS_MCP_RX_FIFO_AVAIL;
+	if (num_resp > ARRAY_SIZE(cdns->response_buf)) {
+		dev_warn(cdns->dev, "RX AVAIL %d too long\n", num_resp);
+		num_resp = ARRAY_SIZE(cdns->response_buf);
+	}
+
+	cmd_base = CDNS_MCP_CMD_BASE;
+
+	for (i = 0; i < num_resp; i++) {
+		cdns->response_buf[i] = cdns_readl(cdns, cmd_base);
+		cmd_base += CDNS_MCP_CMD_WORD_LEN;
+	}
+}
+
+static enum sdw_command_response
+_cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
+	       int offset, int count, bool defer)
+{
+	unsigned long time;
+	u32 base, i, data;
+	u16 addr;
+
+	/* Program the watermark level for RX FIFO */
+	if (cdns->msg_count != count) {
+		cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count);
+		cdns->msg_count = count;
+	}
+
+	base = CDNS_MCP_CMD_BASE;
+	addr = msg->addr + offset;
+
+	for (i = 0; i < count; i++) {
+		data = FIELD_PREP(CDNS_MCP_CMD_DEV_ADDR, msg->dev_num);
+		data |= FIELD_PREP(CDNS_MCP_CMD_COMMAND, cmd);
+		data |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, addr);
+		addr++;
+
+		if (msg->flags == SDW_MSG_FLAG_WRITE)
+			data |= msg->buf[i + offset];
+
+		data |= FIELD_PREP(CDNS_MCP_CMD_SSP_TAG, msg->ssp_sync);
+		cdns_writel(cdns, base, data);
+		base += CDNS_MCP_CMD_WORD_LEN;
+	}
+
+	if (defer)
+		return SDW_CMD_OK;
+
+	/* wait for timeout or response */
+	time = wait_for_completion_timeout(&cdns->tx_complete,
+					   msecs_to_jiffies(CDNS_TX_TIMEOUT));
+	if (!time) {
+		dev_err(cdns->dev, "IO transfer timed out, cmd %d device %d addr %x len %d\n",
+			cmd, msg->dev_num, msg->addr, msg->len);
+		msg->len = 0;
+
+		/* Drain anything in the RX_FIFO */
+		cdns_read_response(cdns);
+
+		return SDW_CMD_TIMEOUT;
+	}
+
+	return cdns_fill_msg_resp(cdns, msg, count, offset);
+}
+
+static enum sdw_command_response
+cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg)
+{
+	int nack = 0, no_ack = 0;
+	unsigned long time;
+	u32 data[2], base;
+	int i;
+
+	/* Program the watermark level for RX FIFO */
+	if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) {
+		cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL);
+		cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL;
+	}
+
+	data[0] = FIELD_PREP(CDNS_MCP_CMD_DEV_ADDR, msg->dev_num);
+	data[0] |= FIELD_PREP(CDNS_MCP_CMD_COMMAND, 0x3);
+	data[1] = data[0];
+
+	data[0] |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, SDW_SCP_ADDRPAGE1);
+	data[1] |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, SDW_SCP_ADDRPAGE2);
+
+	data[0] |= msg->addr_page1;
+	data[1] |= msg->addr_page2;
+
+	base = CDNS_MCP_CMD_BASE;
+	cdns_writel(cdns, base, data[0]);
+	base += CDNS_MCP_CMD_WORD_LEN;
+	cdns_writel(cdns, base, data[1]);
+
+	time = wait_for_completion_timeout(&cdns->tx_complete,
+					   msecs_to_jiffies(CDNS_TX_TIMEOUT));
+	if (!time) {
+		dev_err(cdns->dev, "SCP Msg trf timed out\n");
+		msg->len = 0;
+		return SDW_CMD_TIMEOUT;
+	}
+
+	/* check response the writes */
+	for (i = 0; i < 2; i++) {
+		if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
+			no_ack = 1;
+			dev_err(cdns->dev, "Program SCP Ack not received\n");
+			if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
+				nack = 1;
+				dev_err(cdns->dev, "Program SCP NACK received\n");
+			}
+		}
+	}
+
+	/* For NACK, NO ack, don't return err if we are in Broadcast mode */
+	if (nack) {
+		dev_err_ratelimited(cdns->dev,
+				    "SCP_addrpage NACKed for Slave %d\n", msg->dev_num);
+		return SDW_CMD_FAIL;
+	}
+
+	if (no_ack) {
+		dev_dbg_ratelimited(cdns->dev,
+				    "SCP_addrpage ignored for Slave %d\n", msg->dev_num);
+		return SDW_CMD_IGNORED;
+	}
+
+	return SDW_CMD_OK;
+}
+
+static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd)
+{
+	int ret;
+
+	if (msg->page) {
+		ret = cdns_program_scp_addr(cdns, msg);
+		if (ret) {
+			msg->len = 0;
+			return ret;
+		}
+	}
+
+	switch (msg->flags) {
+	case SDW_MSG_FLAG_READ:
+		*cmd = CDNS_MCP_CMD_READ;
+		break;
+
+	case SDW_MSG_FLAG_WRITE:
+		*cmd = CDNS_MCP_CMD_WRITE;
+		break;
+
+	default:
+		dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+enum sdw_command_response
+cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int cmd = 0, ret, i;
+
+	ret = cdns_prep_msg(cdns, msg, &cmd);
+	if (ret)
+		return SDW_CMD_FAIL_OTHER;
+
+	for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
+		ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
+				     CDNS_MCP_CMD_LEN, false);
+		if (ret != SDW_CMD_OK)
+			return ret;
+	}
+
+	if (!(msg->len % CDNS_MCP_CMD_LEN))
+		return SDW_CMD_OK;
+
+	return _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
+			      msg->len % CDNS_MCP_CMD_LEN, false);
+}
+EXPORT_SYMBOL(cdns_xfer_msg);
+
+enum sdw_command_response
+cdns_xfer_msg_defer(struct sdw_bus *bus,
+		    struct sdw_msg *msg, struct sdw_defer *defer)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int cmd = 0, ret;
+
+	/* for defer only 1 message is supported */
+	if (msg->len > 1)
+		return -ENOTSUPP;
+
+	ret = cdns_prep_msg(cdns, msg, &cmd);
+	if (ret)
+		return SDW_CMD_FAIL_OTHER;
+
+	cdns->defer = defer;
+	cdns->defer->length = msg->len;
+
+	return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true);
+}
+EXPORT_SYMBOL(cdns_xfer_msg_defer);
+
+enum sdw_command_response
+cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	struct sdw_msg msg;
+
+	/* Create dummy message with valid device number */
+	memset(&msg, 0, sizeof(msg));
+	msg.dev_num = dev_num;
+
+	return cdns_program_scp_addr(cdns, &msg);
+}
+EXPORT_SYMBOL(cdns_reset_page_addr);
+
+u32 cdns_read_ping_status(struct sdw_bus *bus)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+
+	return cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
+}
+EXPORT_SYMBOL(cdns_read_ping_status);
+
+/*
+ * IRQ handling
+ */
+
+static int cdns_update_slave_status(struct sdw_cdns *cdns,
+				    u64 slave_intstat)
+{
+	enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
+	bool is_slave = false;
+	u32 mask;
+	u32 val;
+	int i, set_status;
+
+	memset(status, 0, sizeof(status));
+
+	for (i = 0; i <= SDW_MAX_DEVICES; i++) {
+		mask = (slave_intstat >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) &
+			CDNS_MCP_SLAVE_STATUS_BITS;
+
+		set_status = 0;
+
+		if (mask) {
+			is_slave = true;
+
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) {
+				status[i] = SDW_SLAVE_RESERVED;
+				set_status++;
+			}
+
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) {
+				status[i] = SDW_SLAVE_ATTACHED;
+				set_status++;
+			}
+
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) {
+				status[i] = SDW_SLAVE_ALERT;
+				set_status++;
+			}
+
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) {
+				status[i] = SDW_SLAVE_UNATTACHED;
+				set_status++;
+			}
+		}
+
+		/*
+		 * check that there was a single reported Slave status and when
+		 * there is not use the latest status extracted from PING commands
+		 */
+		if (set_status != 1) {
+			val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
+			val >>= (i * 2);
+
+			switch (val & 0x3) {
+			case 0:
+				status[i] = SDW_SLAVE_UNATTACHED;
+				break;
+			case 1:
+				status[i] = SDW_SLAVE_ATTACHED;
+				break;
+			case 2:
+				status[i] = SDW_SLAVE_ALERT;
+				break;
+			case 3:
+			default:
+				status[i] = SDW_SLAVE_RESERVED;
+				break;
+			}
+		}
+	}
+
+	if (is_slave)
+		return sdw_handle_slave_status(&cdns->bus, status);
+
+	return 0;
+}
+
+/**
+ * sdw_cdns_irq() - Cadence interrupt handler
+ * @irq: irq number
+ * @dev_id: irq context
+ */
+irqreturn_t sdw_cdns_irq(int irq, void *dev_id)
+{
+	struct sdw_cdns *cdns = dev_id;
+	u32 int_status;
+
+	/* Check if the link is up */
+	if (!cdns->link_up)
+		return IRQ_NONE;
+
+	int_status = cdns_readl(cdns, CDNS_MCP_INTSTAT);
+
+	/* check for reserved values read as zero */
+	if (int_status & CDNS_MCP_INT_RESERVED)
+		return IRQ_NONE;
+
+	if (!(int_status & CDNS_MCP_INT_IRQ))
+		return IRQ_NONE;
+
+	if (int_status & CDNS_MCP_INT_RX_WL) {
+		cdns_read_response(cdns);
+
+		if (cdns->defer) {
+			cdns_fill_msg_resp(cdns, cdns->defer->msg,
+					   cdns->defer->length, 0);
+			complete(&cdns->defer->complete);
+			cdns->defer = NULL;
+		} else {
+			complete(&cdns->tx_complete);
+		}
+	}
+
+	if (int_status & CDNS_MCP_INT_PARITY) {
+		/* Parity error detected by Master */
+		dev_err_ratelimited(cdns->dev, "Parity error\n");
+	}
+
+	if (int_status & CDNS_MCP_INT_CTRL_CLASH) {
+		/* Slave is driving bit slot during control word */
+		dev_err_ratelimited(cdns->dev, "Bus clash for control word\n");
+	}
+
+	if (int_status & CDNS_MCP_INT_DATA_CLASH) {
+		/*
+		 * Multiple slaves trying to drive bit slot, or issue with
+		 * ownership of data bits or Slave gone bonkers
+		 */
+		dev_err_ratelimited(cdns->dev, "Bus clash for data word\n");
+	}
+
+	if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL &&
+	    int_status & CDNS_MCP_INT_DPINT) {
+		u32 port_intstat;
+
+		/* just log which ports report an error */
+		port_intstat = cdns_readl(cdns, CDNS_MCP_PORT_INTSTAT);
+		dev_err_ratelimited(cdns->dev, "DP interrupt: PortIntStat %8x\n",
+				    port_intstat);
+
+		/* clear status w/ write1 */
+		cdns_writel(cdns, CDNS_MCP_PORT_INTSTAT, port_intstat);
+	}
+
+	if (int_status & CDNS_MCP_INT_SLAVE_MASK) {
+		/* Mask the Slave interrupt and wake thread */
+		cdns_updatel(cdns, CDNS_MCP_INTMASK,
+			     CDNS_MCP_INT_SLAVE_MASK, 0);
+
+		int_status &= ~CDNS_MCP_INT_SLAVE_MASK;
+
+		/*
+		 * Deal with possible race condition between interrupt
+		 * handling and disabling interrupts on suspend.
+		 *
+		 * If the master is in the process of disabling
+		 * interrupts, don't schedule a workqueue
+		 */
+		if (cdns->interrupt_enabled)
+			schedule_work(&cdns->work);
+	}
+
+	cdns_writel(cdns, CDNS_MCP_INTSTAT, int_status);
+	return IRQ_HANDLED;
+}
+EXPORT_SYMBOL(sdw_cdns_irq);
+
+/**
+ * cdns_update_slave_status_work - update slave status in a work since we will need to handle
+ * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave
+ * process.
+ * @work: cdns worker thread
+ */
+static void cdns_update_slave_status_work(struct work_struct *work)
+{
+	struct sdw_cdns *cdns =
+		container_of(work, struct sdw_cdns, work);
+	u32 slave0, slave1;
+	u64 slave_intstat;
+	u32 device0_status;
+	int retry_count = 0;
+
+	/*
+	 * Clear main interrupt first so we don't lose any assertions
+	 * that happen during this function.
+	 */
+	cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK);
+
+	slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
+	slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
+
+	/*
+	 * Clear the bits before handling so we don't lose any
+	 * bits that re-assert.
+	 */
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0);
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);
+
+	/* combine the two status */
+	slave_intstat = ((u64)slave1 << 32) | slave0;
+
+	dev_dbg_ratelimited(cdns->dev, "Slave status change: 0x%llx\n", slave_intstat);
+
+update_status:
+	cdns_update_slave_status(cdns, slave_intstat);
+
+	/*
+	 * When there is more than one peripheral per link, it's
+	 * possible that a deviceB becomes attached after we deal with
+	 * the attachment of deviceA. Since the hardware does a
+	 * logical AND, the attachment of the second device does not
+	 * change the status seen by the driver.
+	 *
+	 * In that case, clearing the registers above would result in
+	 * the deviceB never being detected - until a change of status
+	 * is observed on the bus.
+	 *
+	 * To avoid this race condition, re-check if any device0 needs
+	 * attention with PING commands. There is no need to check for
+	 * ALERTS since they are not allowed until a non-zero
+	 * device_number is assigned.
+	 *
+	 * Do not clear the INTSTAT0/1. While looping to enumerate devices on
+	 * #0 there could be status changes on other devices - these must
+	 * be kept in the INTSTAT so they can be handled when all #0 devices
+	 * have been handled.
+	 */
+
+	device0_status = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
+	device0_status &= 3;
+
+	if (device0_status == SDW_SLAVE_ATTACHED) {
+		if (retry_count++ < SDW_MAX_DEVICES) {
+			dev_dbg_ratelimited(cdns->dev,
+					    "Device0 detected after clearing status, iteration %d\n",
+					    retry_count);
+			slave_intstat = CDNS_MCP_SLAVE_INTSTAT_ATTACHED;
+			goto update_status;
+		} else {
+			dev_err_ratelimited(cdns->dev,
+					    "Device0 detected after %d iterations\n",
+					    retry_count);
+		}
+	}
+
+	/* unmask Slave interrupt now */
+	cdns_updatel(cdns, CDNS_MCP_INTMASK,
+		     CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK);
+
+}
+
+/* paranoia check to make sure self-cleared bits are indeed cleared */
+void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string,
+				       bool initial_delay, int reset_iterations)
+{
+	u32 mcp_control;
+	u32 mcp_config_update;
+	int i;
+
+	if (initial_delay)
+		usleep_range(1000, 1500);
+
+	mcp_control = cdns_readl(cdns, CDNS_MCP_CONTROL);
+
+	/* the following bits should be cleared immediately */
+	if (mcp_control & CDNS_MCP_CONTROL_CMD_RST)
+		dev_err(cdns->dev, "%s failed: MCP_CONTROL_CMD_RST is not cleared\n", string);
+	if (mcp_control & CDNS_MCP_CONTROL_SOFT_RST)
+		dev_err(cdns->dev, "%s failed: MCP_CONTROL_SOFT_RST is not cleared\n", string);
+	if (mcp_control & CDNS_MCP_CONTROL_SW_RST)
+		dev_err(cdns->dev, "%s failed: MCP_CONTROL_SW_RST is not cleared\n", string);
+	if (mcp_control & CDNS_MCP_CONTROL_CLK_STOP_CLR)
+		dev_err(cdns->dev, "%s failed: MCP_CONTROL_CLK_STOP_CLR is not cleared\n", string);
+	mcp_config_update = cdns_readl(cdns, CDNS_MCP_CONFIG_UPDATE);
+	if (mcp_config_update & CDNS_MCP_CONFIG_UPDATE_BIT)
+		dev_err(cdns->dev, "%s failed: MCP_CONFIG_UPDATE_BIT is not cleared\n", string);
+
+	i = 0;
+	while (mcp_control & CDNS_MCP_CONTROL_HW_RST) {
+		if (i == reset_iterations) {
+			dev_err(cdns->dev, "%s failed: MCP_CONTROL_HW_RST is not cleared\n", string);
+			break;
+		}
+
+		dev_dbg(cdns->dev, "%s: MCP_CONTROL_HW_RST is not cleared at iteration %d\n", string, i);
+		i++;
+
+		usleep_range(1000, 1500);
+		mcp_control = cdns_readl(cdns, CDNS_MCP_CONTROL);
+	}
+
+}
+EXPORT_SYMBOL(sdw_cdns_check_self_clearing_bits);
+
+/*
+ * init routines
+ */
+
+/**
+ * sdw_cdns_exit_reset() - Program reset parameters and start bus operations
+ * @cdns: Cadence instance
+ */
+int sdw_cdns_exit_reset(struct sdw_cdns *cdns)
+{
+	/* keep reset delay unchanged to 4096 cycles */
+
+	/* use hardware generated reset */
+	cdns_updatel(cdns, CDNS_MCP_CONTROL,
+		     CDNS_MCP_CONTROL_HW_RST,
+		     CDNS_MCP_CONTROL_HW_RST);
+
+	/* commit changes */
+	cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
+		     CDNS_MCP_CONFIG_UPDATE_BIT,
+		     CDNS_MCP_CONFIG_UPDATE_BIT);
+
+	/* don't wait here */
+	return 0;
+
+}
+EXPORT_SYMBOL(sdw_cdns_exit_reset);
+
+/**
+ * cdns_enable_slave_interrupts() - Enable SDW slave interrupts
+ * @cdns: Cadence instance
+ * @state: boolean for true/false
+ */
+static void cdns_enable_slave_interrupts(struct sdw_cdns *cdns, bool state)
+{
+	u32 mask;
+
+	mask = cdns_readl(cdns, CDNS_MCP_INTMASK);
+	if (state)
+		mask |= CDNS_MCP_INT_SLAVE_MASK;
+	else
+		mask &= ~CDNS_MCP_INT_SLAVE_MASK;
+
+	cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
+}
+
+/**
+ * sdw_cdns_enable_interrupt() - Enable SDW interrupts
+ * @cdns: Cadence instance
+ * @state: True if we are trying to enable interrupt.
+ */
+int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state)
+{
+	u32 slave_intmask0 = 0;
+	u32 slave_intmask1 = 0;
+	u32 mask = 0;
+
+	if (!state)
+		goto update_masks;
+
+	slave_intmask0 = CDNS_MCP_SLAVE_INTMASK0_MASK;
+	slave_intmask1 = CDNS_MCP_SLAVE_INTMASK1_MASK;
+
+	/* enable detection of all slave state changes */
+	mask = CDNS_MCP_INT_SLAVE_MASK;
+
+	/* enable detection of bus issues */
+	mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
+		CDNS_MCP_INT_PARITY;
+
+	/* port interrupt limited to test modes for now */
+	if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL)
+		mask |= CDNS_MCP_INT_DPINT;
+
+	/* enable detection of RX fifo level */
+	mask |= CDNS_MCP_INT_RX_WL;
+
+	/*
+	 * CDNS_MCP_INT_IRQ needs to be set otherwise all previous
+	 * settings are irrelevant
+	 */
+	mask |= CDNS_MCP_INT_IRQ;
+
+	if (interrupt_mask) /* parameter override */
+		mask = interrupt_mask;
+
+update_masks:
+	/* clear slave interrupt status before enabling interrupt */
+	if (state) {
+		u32 slave_state;
+
+		slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
+		cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state);
+		slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
+		cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state);
+	}
+	cdns->interrupt_enabled = state;
+
+	/*
+	 * Complete any on-going status updates before updating masks,
+	 * and cancel queued status updates.
+	 *
+	 * There could be a race with a new interrupt thrown before
+	 * the 3 mask updates below are complete, so in the interrupt
+	 * we use the 'interrupt_enabled' status to prevent new work
+	 * from being queued.
+	 */
+	if (!state)
+		cancel_work_sync(&cdns->work);
+
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0);
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1);
+	cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
+
+	return 0;
+}
+EXPORT_SYMBOL(sdw_cdns_enable_interrupt);
+
+static int cdns_allocate_pdi(struct sdw_cdns *cdns,
+			     struct sdw_cdns_pdi **stream,
+			     u32 num, u32 pdi_offset)
+{
+	struct sdw_cdns_pdi *pdi;
+	int i;
+
+	if (!num)
+		return 0;
+
+	pdi = devm_kcalloc(cdns->dev, num, sizeof(*pdi), GFP_KERNEL);
+	if (!pdi)
+		return -ENOMEM;
+
+	for (i = 0; i < num; i++) {
+		pdi[i].num = i + pdi_offset;
+	}
+
+	*stream = pdi;
+	return 0;
+}
+
+/**
+ * sdw_cdns_pdi_init() - PDI initialization routine
+ *
+ * @cdns: Cadence instance
+ * @config: Stream configurations
+ */
+int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
+		      struct sdw_cdns_stream_config config)
+{
+	struct sdw_cdns_streams *stream;
+	int offset;
+	int ret;
+
+	cdns->pcm.num_bd = config.pcm_bd;
+	cdns->pcm.num_in = config.pcm_in;
+	cdns->pcm.num_out = config.pcm_out;
+
+	/* Allocate PDIs for PCMs */
+	stream = &cdns->pcm;
+
+	/* we allocate PDI0 and PDI1 which are used for Bulk */
+	offset = 0;
+
+	ret = cdns_allocate_pdi(cdns, &stream->bd,
+				stream->num_bd, offset);
+	if (ret)
+		return ret;
+
+	offset += stream->num_bd;
+
+	ret = cdns_allocate_pdi(cdns, &stream->in,
+				stream->num_in, offset);
+	if (ret)
+		return ret;
+
+	offset += stream->num_in;
+
+	ret = cdns_allocate_pdi(cdns, &stream->out,
+				stream->num_out, offset);
+	if (ret)
+		return ret;
+
+	/* Update total number of PCM PDIs */
+	stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out;
+	cdns->num_ports = stream->num_pdi;
+
+	return 0;
+}
+EXPORT_SYMBOL(sdw_cdns_pdi_init);
+
+static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols)
+{
+	u32 val;
+	int c;
+	int r;
+
+	r = sdw_find_row_index(n_rows);
+	c = sdw_find_col_index(n_cols);
+
+	val = FIELD_PREP(CDNS_MCP_FRAME_SHAPE_ROW_MASK, r);
+	val |= FIELD_PREP(CDNS_MCP_FRAME_SHAPE_COL_MASK, c);
+
+	return val;
+}
+
+static void cdns_init_clock_ctrl(struct sdw_cdns *cdns)
+{
+	struct sdw_bus *bus = &cdns->bus;
+	struct sdw_master_prop *prop = &bus->prop;
+	u32 val;
+	u32 ssp_interval;
+	int divider;
+
+	/* Set clock divider */
+	divider	= (prop->mclk_freq / prop->max_clk_freq) - 1;
+
+	cdns_updatel(cdns, CDNS_MCP_CLK_CTRL0,
+		     CDNS_MCP_CLK_MCLKD_MASK, divider);
+	cdns_updatel(cdns, CDNS_MCP_CLK_CTRL1,
+		     CDNS_MCP_CLK_MCLKD_MASK, divider);
+
+	/*
+	 * Frame shape changes after initialization have to be done
+	 * with the bank switch mechanism
+	 */
+	val = cdns_set_initial_frame_shape(prop->default_row,
+					   prop->default_col);
+	cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val);
+
+	/* Set SSP interval to default value */
+	ssp_interval = prop->default_frame_rate / SDW_CADENCE_GSYNC_HZ;
+	cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, ssp_interval);
+	cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, ssp_interval);
+}
+
+/**
+ * sdw_cdns_init() - Cadence initialization
+ * @cdns: Cadence instance
+ */
+int sdw_cdns_init(struct sdw_cdns *cdns)
+{
+	u32 val;
+
+	cdns_init_clock_ctrl(cdns);
+
+	sdw_cdns_check_self_clearing_bits(cdns, __func__, false, 0);
+
+	/* reset msg_count to default value of FIFOLEVEL */
+	cdns->msg_count = cdns_readl(cdns, CDNS_MCP_FIFOLEVEL);
+
+	/* flush command FIFOs */
+	cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_RST,
+		     CDNS_MCP_CONTROL_CMD_RST);
+
+	/* Set cmd accept mode */
+	cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT,
+		     CDNS_MCP_CONTROL_CMD_ACCEPT);
+
+	/* Configure mcp config */
+	val = cdns_readl(cdns, CDNS_MCP_CONFIG);
+
+	/* enable bus operations with clock and data */
+	val &= ~CDNS_MCP_CONFIG_OP;
+	val |= CDNS_MCP_CONFIG_OP_NORMAL;
+
+	/* Set cmd mode for Tx and Rx cmds */
+	val &= ~CDNS_MCP_CONFIG_CMD;
+
+	/* Disable sniffer mode */
+	val &= ~CDNS_MCP_CONFIG_SNIFFER;
+
+	/* Disable auto bus release */
+	val &= ~CDNS_MCP_CONFIG_BUS_REL;
+
+	if (cdns->bus.multi_link)
+		/* Set Multi-master mode to take gsync into account */
+		val |= CDNS_MCP_CONFIG_MMASTER;
+
+	/* leave frame delay to hardware default of 0x1F */
+
+	/* leave command retry to hardware default of 0 */
+
+	cdns_writel(cdns, CDNS_MCP_CONFIG, val);
+
+	/* changes will be committed later */
+	return 0;
+}
+EXPORT_SYMBOL(sdw_cdns_init);
+
+int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params)
+{
+	struct sdw_master_prop *prop = &bus->prop;
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int mcp_clkctrl_off;
+	int divider;
+
+	if (!params->curr_dr_freq) {
+		dev_err(cdns->dev, "NULL curr_dr_freq\n");
+		return -EINVAL;
+	}
+
+	divider	= prop->mclk_freq * SDW_DOUBLE_RATE_FACTOR /
+		params->curr_dr_freq;
+	divider--; /* divider is 1/(N+1) */
+
+	if (params->next_bank)
+		mcp_clkctrl_off = CDNS_MCP_CLK_CTRL1;
+	else
+		mcp_clkctrl_off = CDNS_MCP_CLK_CTRL0;
+
+	cdns_updatel(cdns, mcp_clkctrl_off, CDNS_MCP_CLK_MCLKD_MASK, divider);
+
+	return 0;
+}
+EXPORT_SYMBOL(cdns_bus_conf);
+
+static int cdns_port_params(struct sdw_bus *bus,
+			    struct sdw_port_params *p_params, unsigned int bank)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int dpn_config_off_source;
+	int dpn_config_off_target;
+	int target_num = p_params->num;
+	int source_num = p_params->num;
+	bool override = false;
+	int dpn_config;
+
+	if (target_num == cdns->pdi_loopback_target &&
+	    cdns->pdi_loopback_source != -1) {
+		source_num = cdns->pdi_loopback_source;
+		override = true;
+	}
+
+	if (bank) {
+		dpn_config_off_source = CDNS_DPN_B1_CONFIG(source_num);
+		dpn_config_off_target = CDNS_DPN_B1_CONFIG(target_num);
+	} else {
+		dpn_config_off_source = CDNS_DPN_B0_CONFIG(source_num);
+		dpn_config_off_target = CDNS_DPN_B0_CONFIG(target_num);
+	}
+
+	dpn_config = cdns_readl(cdns, dpn_config_off_source);
+
+	/* use port params if there is no loopback, otherwise use source as is */
+	if (!override) {
+		u32p_replace_bits(&dpn_config, p_params->bps - 1, CDNS_DPN_CONFIG_WL);
+		u32p_replace_bits(&dpn_config, p_params->flow_mode, CDNS_DPN_CONFIG_PORT_FLOW);
+		u32p_replace_bits(&dpn_config, p_params->data_mode, CDNS_DPN_CONFIG_PORT_DAT);
+	}
+
+	cdns_writel(cdns, dpn_config_off_target, dpn_config);
+
+	return 0;
+}
+
+static int cdns_transport_params(struct sdw_bus *bus,
+				 struct sdw_transport_params *t_params,
+				 enum sdw_reg_bank bank)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int dpn_config;
+	int dpn_config_off_source;
+	int dpn_config_off_target;
+	int dpn_hctrl;
+	int dpn_hctrl_off_source;
+	int dpn_hctrl_off_target;
+	int dpn_offsetctrl;
+	int dpn_offsetctrl_off_source;
+	int dpn_offsetctrl_off_target;
+	int dpn_samplectrl;
+	int dpn_samplectrl_off_source;
+	int dpn_samplectrl_off_target;
+	int source_num = t_params->port_num;
+	int target_num = t_params->port_num;
+	bool override = false;
+
+	if (target_num == cdns->pdi_loopback_target &&
+	    cdns->pdi_loopback_source != -1) {
+		source_num = cdns->pdi_loopback_source;
+		override = true;
+	}
+
+	/*
+	 * Note: Only full data port is supported on the Master side for
+	 * both PCM and PDM ports.
+	 */
+
+	if (bank) {
+		dpn_config_off_source = CDNS_DPN_B1_CONFIG(source_num);
+		dpn_hctrl_off_source = CDNS_DPN_B1_HCTRL(source_num);
+		dpn_offsetctrl_off_source = CDNS_DPN_B1_OFFSET_CTRL(source_num);
+		dpn_samplectrl_off_source = CDNS_DPN_B1_SAMPLE_CTRL(source_num);
+
+		dpn_config_off_target = CDNS_DPN_B1_CONFIG(target_num);
+		dpn_hctrl_off_target = CDNS_DPN_B1_HCTRL(target_num);
+		dpn_offsetctrl_off_target = CDNS_DPN_B1_OFFSET_CTRL(target_num);
+		dpn_samplectrl_off_target = CDNS_DPN_B1_SAMPLE_CTRL(target_num);
+
+	} else {
+		dpn_config_off_source = CDNS_DPN_B0_CONFIG(source_num);
+		dpn_hctrl_off_source = CDNS_DPN_B0_HCTRL(source_num);
+		dpn_offsetctrl_off_source = CDNS_DPN_B0_OFFSET_CTRL(source_num);
+		dpn_samplectrl_off_source = CDNS_DPN_B0_SAMPLE_CTRL(source_num);
+
+		dpn_config_off_target = CDNS_DPN_B0_CONFIG(target_num);
+		dpn_hctrl_off_target = CDNS_DPN_B0_HCTRL(target_num);
+		dpn_offsetctrl_off_target = CDNS_DPN_B0_OFFSET_CTRL(target_num);
+		dpn_samplectrl_off_target = CDNS_DPN_B0_SAMPLE_CTRL(target_num);
+	}
+
+	dpn_config = cdns_readl(cdns, dpn_config_off_source);
+	if (!override) {
+		u32p_replace_bits(&dpn_config, t_params->blk_grp_ctrl, CDNS_DPN_CONFIG_BGC);
+		u32p_replace_bits(&dpn_config, t_params->blk_pkg_mode, CDNS_DPN_CONFIG_BPM);
+	}
+	cdns_writel(cdns, dpn_config_off_target, dpn_config);
+
+	if (!override) {
+		dpn_offsetctrl = 0;
+		u32p_replace_bits(&dpn_offsetctrl, t_params->offset1, CDNS_DPN_OFFSET_CTRL_1);
+		u32p_replace_bits(&dpn_offsetctrl, t_params->offset2, CDNS_DPN_OFFSET_CTRL_2);
+	} else {
+		dpn_offsetctrl = cdns_readl(cdns, dpn_offsetctrl_off_source);
+	}
+	cdns_writel(cdns, dpn_offsetctrl_off_target,  dpn_offsetctrl);
+
+	if (!override) {
+		dpn_hctrl = 0;
+		u32p_replace_bits(&dpn_hctrl, t_params->hstart, CDNS_DPN_HCTRL_HSTART);
+		u32p_replace_bits(&dpn_hctrl, t_params->hstop, CDNS_DPN_HCTRL_HSTOP);
+		u32p_replace_bits(&dpn_hctrl, t_params->lane_ctrl, CDNS_DPN_HCTRL_LCTRL);
+	} else {
+		dpn_hctrl = cdns_readl(cdns, dpn_hctrl_off_source);
+	}
+	cdns_writel(cdns, dpn_hctrl_off_target, dpn_hctrl);
+
+	if (!override)
+		dpn_samplectrl = t_params->sample_interval - 1;
+	else
+		dpn_samplectrl = cdns_readl(cdns, dpn_samplectrl_off_source);
+	cdns_writel(cdns, dpn_samplectrl_off_target, dpn_samplectrl);
+
+	return 0;
+}
+
+static int cdns_port_enable(struct sdw_bus *bus,
+			    struct sdw_enable_ch *enable_ch, unsigned int bank)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	int dpn_chnen_off, ch_mask;
+
+	if (bank)
+		dpn_chnen_off = CDNS_DPN_B1_CH_EN(enable_ch->port_num);
+	else
+		dpn_chnen_off = CDNS_DPN_B0_CH_EN(enable_ch->port_num);
+
+	ch_mask = enable_ch->ch_mask * enable_ch->enable;
+	cdns_writel(cdns, dpn_chnen_off, ch_mask);
+
+	return 0;
+}
+
+static const struct sdw_master_port_ops cdns_port_ops = {
+	.dpn_set_port_params = cdns_port_params,
+	.dpn_set_port_transport_params = cdns_transport_params,
+	.dpn_port_enable_ch = cdns_port_enable,
+};
+
+/**
+ * sdw_cdns_is_clock_stop: Check clock status
+ *
+ * @cdns: Cadence instance
+ */
+bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns)
+{
+	return !!(cdns_readl(cdns, CDNS_MCP_STAT) & CDNS_MCP_STAT_CLK_STOP);
+}
+EXPORT_SYMBOL(sdw_cdns_is_clock_stop);
+
+/**
+ * sdw_cdns_clock_stop: Cadence clock stop configuration routine
+ *
+ * @cdns: Cadence instance
+ * @block_wake: prevent wakes if required by the platform
+ */
+int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake)
+{
+	bool slave_present = false;
+	struct sdw_slave *slave;
+	int ret;
+
+	sdw_cdns_check_self_clearing_bits(cdns, __func__, false, 0);
+
+	/* Check suspend status */
+	if (sdw_cdns_is_clock_stop(cdns)) {
+		dev_dbg(cdns->dev, "Clock is already stopped\n");
+		return 0;
+	}
+
+	/*
+	 * Before entering clock stop we mask the Slave
+	 * interrupts. This helps avoid having to deal with e.g. a
+	 * Slave becoming UNATTACHED while the clock is being stopped
+	 */
+	cdns_enable_slave_interrupts(cdns, false);
+
+	/*
+	 * For specific platforms, it is required to be able to put
+	 * master into a state in which it ignores wake-up trials
+	 * in clock stop state
+	 */
+	if (block_wake)
+		cdns_updatel(cdns, CDNS_MCP_CONTROL,
+			     CDNS_MCP_CONTROL_BLOCK_WAKEUP,
+			     CDNS_MCP_CONTROL_BLOCK_WAKEUP);
+
+	list_for_each_entry(slave, &cdns->bus.slaves, node) {
+		if (slave->status == SDW_SLAVE_ATTACHED ||
+		    slave->status == SDW_SLAVE_ALERT) {
+			slave_present = true;
+			break;
+		}
+	}
+
+	/* commit changes */
+	ret = cdns_config_update(cdns);
+	if (ret < 0) {
+		dev_err(cdns->dev, "%s: config_update failed\n", __func__);
+		return ret;
+	}
+
+	/* Prepare slaves for clock stop */
+	if (slave_present) {
+		ret = sdw_bus_prep_clk_stop(&cdns->bus);
+		if (ret < 0 && ret != -ENODATA) {
+			dev_err(cdns->dev, "prepare clock stop failed %d\n", ret);
+			return ret;
+		}
+	}
+
+	/*
+	 * Enter clock stop mode and only report errors if there are
+	 * Slave devices present (ALERT or ATTACHED)
+	 */
+	ret = sdw_bus_clk_stop(&cdns->bus);
+	if (ret < 0 && slave_present && ret != -ENODATA) {
+		dev_err(cdns->dev, "bus clock stop failed %d\n", ret);
+		return ret;
+	}
+
+	ret = cdns_set_wait(cdns, CDNS_MCP_STAT,
+			    CDNS_MCP_STAT_CLK_STOP,
+			    CDNS_MCP_STAT_CLK_STOP);
+	if (ret < 0)
+		dev_err(cdns->dev, "Clock stop failed %d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL(sdw_cdns_clock_stop);
+
+/**
+ * sdw_cdns_clock_restart: Cadence PM clock restart configuration routine
+ *
+ * @cdns: Cadence instance
+ * @bus_reset: context may be lost while in low power modes and the bus
+ * may require a Severe Reset and re-enumeration after a wake.
+ */
+int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset)
+{
+	int ret;
+
+	/* unmask Slave interrupts that were masked when stopping the clock */
+	cdns_enable_slave_interrupts(cdns, true);
+
+	ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,
+			     CDNS_MCP_CONTROL_CLK_STOP_CLR);
+	if (ret < 0) {
+		dev_err(cdns->dev, "Couldn't exit from clock stop\n");
+		return ret;
+	}
+
+	ret = cdns_set_wait(cdns, CDNS_MCP_STAT, CDNS_MCP_STAT_CLK_STOP, 0);
+	if (ret < 0) {
+		dev_err(cdns->dev, "clock stop exit failed %d\n", ret);
+		return ret;
+	}
+
+	cdns_updatel(cdns, CDNS_MCP_CONTROL,
+		     CDNS_MCP_CONTROL_BLOCK_WAKEUP, 0);
+
+	cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT,
+		     CDNS_MCP_CONTROL_CMD_ACCEPT);
+
+	if (!bus_reset) {
+
+		/* enable bus operations with clock and data */
+		cdns_updatel(cdns, CDNS_MCP_CONFIG,
+			     CDNS_MCP_CONFIG_OP,
+			     CDNS_MCP_CONFIG_OP_NORMAL);
+
+		ret = cdns_config_update(cdns);
+		if (ret < 0) {
+			dev_err(cdns->dev, "%s: config_update failed\n", __func__);
+			return ret;
+		}
+
+		ret = sdw_bus_exit_clk_stop(&cdns->bus);
+		if (ret < 0)
+			dev_err(cdns->dev, "bus failed to exit clock stop %d\n", ret);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(sdw_cdns_clock_restart);
+
+/**
+ * sdw_cdns_probe() - Cadence probe routine
+ * @cdns: Cadence instance
+ */
+int sdw_cdns_probe(struct sdw_cdns *cdns)
+{
+	init_completion(&cdns->tx_complete);
+	cdns->bus.port_ops = &cdns_port_ops;
+
+	INIT_WORK(&cdns->work, cdns_update_slave_status_work);
+	return 0;
+}
+EXPORT_SYMBOL(sdw_cdns_probe);
+
+int cdns_set_sdw_stream(struct snd_soc_dai *dai,
+			void *stream, int direction)
+{
+	struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+	struct sdw_cdns_dai_runtime *dai_runtime;
+
+	if (stream) {
+		/* first paranoia check */
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+			dai_runtime = dai->playback_dma_data;
+		else
+			dai_runtime = dai->capture_dma_data;
+
+		if (dai_runtime) {
+			dev_err(dai->dev,
+				"dai_runtime already allocated for dai %s\n",
+				dai->name);
+			return -EINVAL;
+		}
+
+		/* allocate and set dai_runtime info */
+		dai_runtime = kzalloc(sizeof(*dai_runtime), GFP_KERNEL);
+		if (!dai_runtime)
+			return -ENOMEM;
+
+		dai_runtime->stream_type = SDW_STREAM_PCM;
+
+		dai_runtime->bus = &cdns->bus;
+		dai_runtime->link_id = cdns->instance;
+
+		dai_runtime->stream = stream;
+
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+			dai->playback_dma_data = dai_runtime;
+		else
+			dai->capture_dma_data = dai_runtime;
+	} else {
+		/* for NULL stream we release allocated dai_runtime */
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+			kfree(dai->playback_dma_data);
+			dai->playback_dma_data = NULL;
+		} else {
+			kfree(dai->capture_dma_data);
+			dai->capture_dma_data = NULL;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(cdns_set_sdw_stream);
+
+/**
+ * cdns_find_pdi() - Find a free PDI
+ *
+ * @cdns: Cadence instance
+ * @offset: Starting offset
+ * @num: Number of PDIs
+ * @pdi: PDI instances
+ * @dai_id: DAI id
+ *
+ * Find a PDI for a given PDI array. The PDI num and dai_id are
+ * expected to match, return NULL otherwise.
+ */
+static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns,
+					  unsigned int offset,
+					  unsigned int num,
+					  struct sdw_cdns_pdi *pdi,
+					  int dai_id)
+{
+	int i;
+
+	for (i = offset; i < offset + num; i++)
+		if (pdi[i].num == dai_id)
+			return &pdi[i];
+
+	return NULL;
+}
+
+/**
+ * sdw_cdns_config_stream: Configure a stream
+ *
+ * @cdns: Cadence instance
+ * @ch: Channel count
+ * @dir: Data direction
+ * @pdi: PDI to be used
+ */
+void sdw_cdns_config_stream(struct sdw_cdns *cdns,
+			    u32 ch, u32 dir, struct sdw_cdns_pdi *pdi)
+{
+	u32 offset, val = 0;
+
+	if (dir == SDW_DATA_DIR_RX) {
+		val = CDNS_PORTCTRL_DIRN;
+
+		if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL)
+			val |= CDNS_PORTCTRL_TEST_FAILED;
+	}
+	offset = CDNS_PORTCTRL + pdi->num * CDNS_PORT_OFFSET;
+	cdns_updatel(cdns, offset,
+		     CDNS_PORTCTRL_DIRN | CDNS_PORTCTRL_TEST_FAILED,
+		     val);
+
+	val = pdi->num;
+	val |= CDNS_PDI_CONFIG_SOFT_RESET;
+	val |= FIELD_PREP(CDNS_PDI_CONFIG_CHANNEL, (1 << ch) - 1);
+	cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val);
+}
+EXPORT_SYMBOL(sdw_cdns_config_stream);
+
+/**
+ * sdw_cdns_alloc_pdi() - Allocate a PDI
+ *
+ * @cdns: Cadence instance
+ * @stream: Stream to be allocated
+ * @ch: Channel count
+ * @dir: Data direction
+ * @dai_id: DAI id
+ */
+struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
+					struct sdw_cdns_streams *stream,
+					u32 ch, u32 dir, int dai_id)
+{
+	struct sdw_cdns_pdi *pdi = NULL;
+
+	if (dir == SDW_DATA_DIR_RX)
+		pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in,
+				    dai_id);
+	else
+		pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out,
+				    dai_id);
+
+	/* check if we found a PDI, else find in bi-directional */
+	if (!pdi)
+		pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd,
+				    dai_id);
+
+	if (pdi) {
+		pdi->l_ch_num = 0;
+		pdi->h_ch_num = ch - 1;
+		pdi->dir = dir;
+		pdi->ch_count = ch;
+	}
+
+	return pdi;
+}
+EXPORT_SYMBOL(sdw_cdns_alloc_pdi);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Cadence Soundwire Library");