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      #include <linux/mutex.h>
     ˆ¿Âƒp.»¾ÁÀ !    /* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) ST-Ericsson SA 2007-2010
 * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
 * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
 */


#ifndef STE_DMA40_H
#define STE_DMA40_H

#include <linux/dmaengine.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>

/*
 * Maximum size for a single dma descriptor
 * Size is limited to 16 bits.
 * Size is in the units of addr-widths (1,2,4,8 bytes)
 * Larger transfers will be split up to multiple linked desc
 */
#define STEDMA40_MAX_SEG_SIZE 0xFFFF

/* dev types for memcpy */
#define STEDMA40_DEV_DST_MEMORY (-1)
#define	STEDMA40_DEV_SRC_MEMORY (-1)

enum stedma40_mode {
	STEDMA40_MODE_LOGICAL = 0,
	STEDMA40_MODE_PHYSICAL,
	STEDMA40_MODE_OPERATION,
};

enum stedma40_mode_opt {
	STEDMA40_PCHAN_BASIC_MODE = 0,
	STEDMA40_LCHAN_SRC_LOG_DST_LOG = 0,
	STEDMA40_PCHAN_MODULO_MODE,
	STEDMA40_PCHAN_DOUBLE_DST_MODE,
	STEDMA40_LCHAN_SRC_PHY_DST_LOG,
	STEDMA40_LCHAN_SRC_LOG_DST_PHY,
};

#define STEDMA40_ESIZE_8_BIT  0x0
#define STEDMA40_ESIZE_16_BIT 0x1
#define STEDMA40_ESIZE_32_BIT 0x2
#define STEDMA40_ESIZE_64_BIT 0x3

/* The value 4 indicates that PEN-reg shall be set to 0 */
#define STEDMA40_PSIZE_PHY_1  0x4
#define STEDMA40_PSIZE_PHY_2  0x0
#define STEDMA40_PSIZE_PHY_4  0x1
#define STEDMA40_PSIZE_PHY_8  0x2
#define STEDMA40_PSIZE_PHY_16 0x3

/*
 * The number of elements differ in logical and
 * physical mode
 */
#define STEDMA40_PSIZE_LOG_1  STEDMA40_PSIZE_PHY_2
#define STEDMA40_PSIZE_LOG_4  STEDMA40_PSIZE_PHY_4
#define STEDMA40_PSIZE_LOG_8  STEDMA40_PSIZE_PHY_8
#define STEDMA40_PSIZE_LOG_16 STEDMA40_PSIZE_PHY_16

/* Maximum number of possible physical channels */
#define STEDMA40_MAX_PHYS 32

enum stedma40_flow_ctrl {
	STEDMA40_NO_FLOW_CTRL,
	STEDMA40_FLOW_CTRL,
};

/**
 * struct stedma40_half_channel_info - dst/src channel configuration
 *
 * @big_endian: true if the src/dst should be read as big endian
 * @data_width: Data width of the src/dst hardware
 * @p_size: Burst size
 * @flow_ctrl: Flow control on/off.
 */
struct stedma40_half_channel_info {
	bool big_endian;
	enum dma_slave_buswidth data_width;
	int psize;
	enum stedma40_flow_ctrl flow_ctrl;
};

/**
 * struct stedma40_chan_cfg - Structure to be filled by client drivers.
 *
 * @dir: MEM 2 MEM, PERIPH 2 MEM , MEM 2 PERIPH, PERIPH 2 PERIPH
 * @high_priority: true if high-priority
 * @realtime: true if realtime mode is to be enabled.  Only available on DMA40
 * version 3+, i.e DB8500v2+
 * @mode: channel mode: physical, logical, or operation
 * @mode_opt: options for the chosen channel mode
 * @dev_type: src/dst device type (driver uses dir to figure out which)
 * @src_info: Parameters for dst half channel
 * @dst_info: Parameters for dst half channel
 * @use_fixed_channel: if true, use physical channel specified by phy_channel
 * @phy_channel: physical channel to use, only if use_fixed_channel is true
 *
 * This structure has to be filled by the client drivers.
 * It is recommended to do all dma configurations for clients in the machine.
 *
 */
struct stedma40_chan_cfg {
	enum dma_transfer_direction		 dir;
	bool					 high_priority;
	bool					 realtime;
	enum stedma40_mode			 mode;
	enum stedma40_mode_opt			 mode_opt;
	int					 dev_type;
	struct stedma40_half_channel_info	 src_info;
	struct stedma40_half_channel_info	 dst_info;

	bool					 use_fixed_channel;
	int					 phy_channel;
};

/**
 * struct stedma40_platform_data - Configuration struct for the dma device.
 *
 * @dev_tx: mapping between destination event line and io address
 * @dev_rx: mapping between source event line and io address
 * @disabled_channels: A vector, ending with -1, that marks physical channels
 * that are for different reasons not available for the driver.
 * @soft_lli_chans: A vector, that marks physical channels will use LLI by SW
 * which avoids HW bug that exists in some versions of the controller.
 * SoftLLI introduces relink overhead that could impact perform