path: root/drivers/soundwire/cadence_master.c

// 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/soundwire/sdw_registers.h>
#include <linux/soundwire/sdw.h>
#include <sound/pcm_params.h>
#include <sound/soc.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_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_OFFSET		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_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_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_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
#define CDNS_MCP_CMD_LEN			0x20
#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_H			GENMASK(23, 16)
#define CDNS_MCP_CMD_REG_ADDR_L			GENMASK(15, 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)