drivers/platform/msm/sps/sps_bam.h - kernel/msm-4.19 - Gitiles

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
  */
 /*
  * Function and data structure declarations for SPS BAM handling.
  */


 #ifndef _SPSBAM_H_
 #define _SPSBAM_H_

 #include <linux/types.h>
 #include <linux/completion.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>

 #include "spsi.h"

 #define BAM_HANDLE_INVALID         0

 #define to_sps_bam_dev(x) \
 	container_of((x), struct sps_bam, base)

 enum bam_irq {
 	BAM_DEV_IRQ_RDY_TO_SLEEP = 0x00000001,
 	BAM_DEV_IRQ_HRESP_ERROR = 0x00000002,
 	BAM_DEV_IRQ_ERROR = 0x00000004,
 	BAM_DEV_IRQ_TIMER = 0x00000010,
 };

 /* Pipe interrupt mask */
 enum bam_pipe_irq {
 	/* BAM finishes descriptor which has INT bit selected */
 	BAM_PIPE_IRQ_DESC_INT = 0x00000001,
 	/* Inactivity timer Expires */
 	BAM_PIPE_IRQ_TIMER = 0x00000002,
 	/* Wakeup peripheral (i.e. USB) */
 	BAM_PIPE_IRQ_WAKE = 0x00000004,
 	/* Producer - no free space for adding a descriptor */
 	/* Consumer - no descriptors for processing */
 	BAM_PIPE_IRQ_OUT_OF_DESC = 0x00000008,
 	/* Pipe Error interrupt */
 	BAM_PIPE_IRQ_ERROR = 0x00000010,
 	/* End-Of-Transfer */
 	BAM_PIPE_IRQ_EOT = 0x00000020,
 	/* Pipe RESET unsuccessful */
 	BAM_PIPE_IRQ_RST_ERROR = 0x00000040,
 	/* Errorneous Hresponse by AHB MASTER */
 	BAM_PIPE_IRQ_HRESP_ERROR = 0x00000080,
 };

 /* Halt Type */
 enum bam_halt {
 	BAM_HALT_OFF = 0,
 	BAM_HALT_ON = 1,
 };

 /* Threshold values of the DMA channels */
 enum bam_dma_thresh_dma {
 	BAM_DMA_THRESH_512 = 0x3,
 	BAM_DMA_THRESH_256 = 0x2,
 	BAM_DMA_THRESH_128 = 0x1,
 	BAM_DMA_THRESH_64 = 0x0,
 };

 /* Weight values of the DMA channels */
 enum bam_dma_weight_dma {
 	BAM_DMA_WEIGHT_HIGH = 7,
 	BAM_DMA_WEIGHT_MED = 3,
 	BAM_DMA_WEIGHT_LOW = 1,
 	BAM_DMA_WEIGHT_DEFAULT = BAM_DMA_WEIGHT_LOW,
 	BAM_DMA_WEIGHT_DISABLE = 0,
 };


 /* Invalid pipe index value */
 #define SPS_BAM_PIPE_INVALID  ((u32)(-1))

 /* Parameters for sps_bam_pipe_connect() */
 struct sps_bam_connect_param {
 	/* which end point must be initialized */
 	enum sps_mode mode;

 	/* OR'd connection end point options (see SPS_O defines) */
 	u32 options;

 	/* SETPEND/MTI interrupt generation parameters */
 	u32 irq_gen_addr;
 	u32 irq_gen_data;

 };

 /* Event registration struct */
 struct sps_bam_event_reg {
 	/* Client's event object handle */
 	struct completion *xfer_done;
 	void (*callback)(struct sps_event_notify *notify);

 	/* Event trigger mode */
 	enum sps_trigger mode;

 	/* User pointer that will be provided in event payload data */
 	void *user;

 };

 /* Descriptor FIFO cache entry */
 struct sps_bam_desc_cache {
 	struct sps_iovec iovec;
 	void *user; /* User pointer registered with this transfer */
 };

 /* Forward declaration */
 struct sps_bam;

 /* System mode control */
 struct sps_bam_sys_mode {
 	/* Descriptor FIFO control */
 	u8 *desc_buf; /* Descriptor FIFO for BAM pipe */
 	u32 desc_offset; /* Next new descriptor to be written to hardware */
 	u32 acked_offset; /* Next descriptor to be retired by software */

 	/* Descriptor cache control (!no_queue only) */
 	u8 *desc_cache; /* Software cache of descriptor FIFO contents */
 	u32 cache_offset; /* Next descriptor to be cached (ack_xfers only) */

 	/* User pointers associated with cached descriptors */
 	void **user_ptrs;

 	/* Event handling */
 	struct sps_bam_event_reg event_regs[SPS_EVENT_INDEX(SPS_EVENT_MAX)];
 	struct list_head events_q;

 	struct sps_q_event event;	/* Temp storage for event creation */
 	int no_queue;	/* Whether events are queued */
 	int ack_xfers;	/* Whether client must ACK all descriptors */
 	int handler_eot; /* Whether EOT handling is in progress (debug) */

 	/* Statistics */
 #ifdef SPS_BAM_STATISTICS
 	u32 desc_wr_count;
 	u32 desc_rd_count;
 	u32 user_ptrs_count;
 	u32 user_found;
 	u32 int_flags;
 	u32 eot_flags;
 	u32 callback_events;
 	u32 wait_events;
 	u32 queued_events;
 	u32 get_events;
 	u32 get_iovecs;
 #endif /* SPS_BAM_STATISTICS */
 };

 /* BAM pipe descriptor */
 struct sps_pipe {
 	struct list_head list;

 	/* Client state */
 	u32 client_state;
 	struct sps_bam *bam;
 	struct sps_connect connect;
 	const struct sps_connection *map;

 	/* Pipe parameters */
 	u32 state;
 	u32 pipe_index;
 	u32 pipe_index_mask;
 	u32 irq_mask;
 	int polled;
 	int hybrid;
 	bool late_eot;
 	u32 irq_gen_addr;
 	enum sps_mode mode;
 	u32 num_descs; /* Size (number of elements) of descriptor FIFO */
 	u32 desc_size; /* Size (bytes) of descriptor FIFO */
 	int wake_up_is_one_shot; /* Whether WAKEUP event is a one-shot or not */

 	/* System mode control */
 	struct sps_bam_sys_mode sys;

 	bool disconnecting;
 };

 /* BAM device descriptor */
 struct sps_bam {
 	struct list_head list;

 	/* BAM device properties, including connection defaults */
 	struct sps_bam_props props;

 	/* BAM device state */
 	u32 state;
 	struct mutex lock;
 	void __iomem *base; /* BAM virtual base address */
 	u32 version;
 	spinlock_t isr_lock;
 	spinlock_t connection_lock;
 	unsigned long irqsave_flags;

 	/* Pipe state */
 	u32 pipe_active_mask;
 	u32 pipe_remote_mask;
 	struct sps_pipe *pipes[BAM_MAX_PIPES];
 	struct list_head pipes_q;

 	/* Statistics */
 	u32 irq_from_disabled_pipe;
 	u32 event_trigger_failures;

 	void *ipc_log0;
 	void *ipc_log1;
 	void *ipc_log2;
 	void *ipc_log3;
 	void *ipc_log4;

 	u32 ipc_loglevel;

 	/* Desc cache pointers */
 	u8 *desc_cache_pointers[BAM_MAX_PIPES];
 };

 /**
  * BAM driver initialization
  *
  * This function initializes the BAM driver.
  *
  * @options - driver options bitflags (see SPS_OPT_*)
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_driver_init(u32 options);

 /**
  * BAM device initialization
  *
  * This function initializes a BAM device.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_device_init(struct sps_bam *dev);

 /**
  * BAM device de-initialization
  *
  * This function de-initializes a BAM device.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_device_de_init(struct sps_bam *dev);

 /**
  * BAM device reset
  *
  * This Function resets a BAM device.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_reset(struct sps_bam *dev);

 /**
  * BAM device enable
  *
  * This function enables a BAM device.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_enable(struct sps_bam *dev);

 /**
  * BAM device disable
  *
  * This Function disables a BAM device.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_disable(struct sps_bam *dev);

 /**
  * Allocate a BAM pipe
  *
  * This function allocates a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - client-specified pipe index, or SPS_BAM_PIPE_INVALID if
  *    any available pipe is acceptable
  *
  * @return - allocated pipe index, or SPS_BAM_PIPE_INVALID on error
  *
  */
 u32 sps_bam_pipe_alloc(struct sps_bam *dev, u32 pipe_index);

 /**
  * Free a BAM pipe
  *
  * This function frees a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  */
 void sps_bam_pipe_free(struct sps_bam *dev, u32 pipe_index);

 /**
  * Establish BAM pipe connection
  *
  * This function establishes a connection for a BAM pipe (end point).
  *
  * @client - pointer to client pipe state struct
  *
  * @params - connection parameters
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_connect(struct sps_pipe *client,
 			const struct sps_bam_connect_param *params);

 /**
  * Disconnect a BAM pipe connection
  *
  * This function disconnects a connection for a BAM pipe (end point).
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_disconnect(struct sps_bam *dev, u32 pipe_index);

 /**
  * Set BAM pipe parameters
  *
  * This function sets parameters for a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @options - bitflag options (see SPS_O_*)
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_set_params(struct sps_bam *dev, u32 pipe_index, u32 options);

 /**
  * Enable a BAM pipe
  *
  * This function enables a BAM pipe.  Note that this function
  *    is separate from the pipe connect function to allow proper
  *    sequencing of consumer enable followed by producer enable.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_enable(struct sps_bam *dev, u32 pipe_index);

 /**
  * Disable a BAM pipe
  *
  * This function disables a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_disable(struct sps_bam *dev, u32 pipe_index);

 /**
  * Register an event for a BAM pipe
  *
  * This function registers an event for a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @reg - pointer to event registration struct
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_reg_event(struct sps_bam *dev, u32 pipe_index,
 			   struct sps_register_event *reg);

 /**
  * Submit a transfer of a single buffer to a BAM pipe
  *
  * This function submits a transfer of a single buffer to a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @addr - physical address of buffer to transfer
  *
  * @size - number of bytes to transfer
  *
  * @user - user pointer to register for event
  *
  * @flags - descriptor flags (see SPS_IOVEC_FLAG defines)
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_transfer_one(struct sps_bam *dev, u32 pipe_index, u32 addr,
 			      u32 size, void *user, u32 flags);

 /**
  * Submit a transfer to a BAM pipe
  *
  * This function submits a transfer to a BAM pipe.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @transfer - pointer to transfer struct
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_transfer(struct sps_bam *dev, u32 pipe_index,
 			 struct sps_transfer *transfer);

 /**
  * Get a BAM pipe event
  *
  * This function polls for a BAM pipe event.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @notify - pointer to event notification struct
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_get_event(struct sps_bam *dev, u32 pipe_index,
 			   struct sps_event_notify *notify);

 /**
  * Get processed I/O vector
  *
  * This function fetches the next processed I/O vector.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @iovec - Pointer to I/O vector struct (output).
  *   This struct will be zeroed if there are no more processed I/O vectors.
  *
  * @return 0 on success, negative value on error
  */
 int sps_bam_pipe_get_iovec(struct sps_bam *dev, u32 pipe_index,
 			   struct sps_iovec *iovec);

 /**
  * Determine whether a BAM pipe descriptor FIFO is empty
  *
  * This function returns the empty state of a BAM pipe descriptor FIFO.
  *
  * The pipe mutex must be locked before calling this function.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @empty - pointer to client's empty status word (boolean)
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_is_empty(struct sps_bam *dev, u32 pipe_index, u32 *empty);

 /**
  * Get number of free slots in a BAM pipe descriptor FIFO
  *
  * This function returns the number of free slots in a BAM pipe descriptor FIFO.
  *
  * The pipe mutex must be locked before calling this function.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @count - pointer to count status
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_get_free_count(struct sps_bam *dev, u32 pipe_index, u32 *count);

 /**
  * Set BAM pipe to satellite ownership
  *
  * This function sets the BAM pipe to satellite ownership.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_set_satellite(struct sps_bam *dev, u32 pipe_index);

 /**
  * Perform BAM pipe timer control
  *
  * This function performs BAM pipe timer control operations.
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @timer_ctrl - Pointer to timer control specification
  *
  * @timer_result - Pointer to buffer for timer operation result.
  *    This argument can be NULL if no result is expected for the operation.
  *    If non-NULL, the current timer value will always provided.
  *
  * @return 0 on success, negative value on error
  *
  */
 int sps_bam_pipe_timer_ctrl(struct sps_bam *dev, u32 pipe_index,
 			    struct sps_timer_ctrl *timer_ctrl,
 			    struct sps_timer_result *timer_result);


 /**
  * Get the number of unused descriptors in the descriptor FIFO
  * of a pipe
  *
  * @dev - pointer to BAM device descriptor
  *
  * @pipe_index - pipe index
  *
  * @desc_num - number of unused descriptors
  *
  */
 int sps_bam_pipe_get_unused_desc_num(struct sps_bam *dev, u32 pipe_index,
 					u32 *desc_num);

 /*
  * sps_bam_check_irq - check IRQ of a BAM device.
  * @dev - pointer to BAM device descriptor
  *
  * This function checks any pending interrupt of a BAM device.
  *
  * Return: 0 on success, negative value on error
  */
 int sps_bam_check_irq(struct sps_bam *dev);

 /*
  * sps_bam_pipe_pending_desc - checking pending descriptor.
  * @dev:	BAM device handle
  * @pipe_index:	pipe index
  *
  * This function checks if a pipe of a BAM has any pending descriptor.
  *
  * @return true if there is any desc pending
  */
 bool sps_bam_pipe_pending_desc(struct sps_bam *dev, u32 pipe_index);

 /*
  * sps_bam_pipe_inject_zlt - inject a ZLT with EOT.
  * @dev:	BAM device handle
  * @pipe_index:	pipe index
  *
  * This function injects a ZLT with EOT for a pipe of a BAM.
  *
  * Return: 0 on success, negative value on error
  */
 int sps_bam_pipe_inject_zlt(struct sps_bam *dev, u32 pipe_index);
 #endif	/* _SPSBAM_H_ */
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
	*/
	/*
	* Function and data structure declarations for SPS BAM handling.
	*/


	#ifndef _SPSBAM_H_
	#define _SPSBAM_H_

	#include <linux/types.h>
	#include <linux/completion.h>
	#include <linux/list.h>
	#include <linux/mutex.h>
	#include <linux/spinlock.h>

	#include "spsi.h"

	#define BAM_HANDLE_INVALID 0

	#define to_sps_bam_dev(x) \
	container_of((x), struct sps_bam, base)

	enum bam_irq {
	BAM_DEV_IRQ_RDY_TO_SLEEP = 0x00000001,
	BAM_DEV_IRQ_HRESP_ERROR = 0x00000002,
	BAM_DEV_IRQ_ERROR = 0x00000004,
	BAM_DEV_IRQ_TIMER = 0x00000010,
	};

	/* Pipe interrupt mask */
	enum bam_pipe_irq {
	/* BAM finishes descriptor which has INT bit selected */
	BAM_PIPE_IRQ_DESC_INT = 0x00000001,
	/* Inactivity timer Expires */
	BAM_PIPE_IRQ_TIMER = 0x00000002,
	/* Wakeup peripheral (i.e. USB) */
	BAM_PIPE_IRQ_WAKE = 0x00000004,
	/* Producer - no free space for adding a descriptor */
	/* Consumer - no descriptors for processing */
	BAM_PIPE_IRQ_OUT_OF_DESC = 0x00000008,
	/* Pipe Error interrupt */
	BAM_PIPE_IRQ_ERROR = 0x00000010,
	/* End-Of-Transfer */
	BAM_PIPE_IRQ_EOT = 0x00000020,
	/* Pipe RESET unsuccessful */
	BAM_PIPE_IRQ_RST_ERROR = 0x00000040,
	/* Errorneous Hresponse by AHB MASTER */
	BAM_PIPE_IRQ_HRESP_ERROR = 0x00000080,
	};

	/* Halt Type */
	enum bam_halt {
	BAM_HALT_OFF = 0,
	BAM_HALT_ON = 1,
	};

	/* Threshold values of the DMA channels */
	enum bam_dma_thresh_dma {
	BAM_DMA_THRESH_512 = 0x3,
	BAM_DMA_THRESH_256 = 0x2,
	BAM_DMA_THRESH_128 = 0x1,
	BAM_DMA_THRESH_64 = 0x0,
	};

	/* Weight values of the DMA channels */
	enum bam_dma_weight_dma {
	BAM_DMA_WEIGHT_HIGH = 7,
	BAM_DMA_WEIGHT_MED = 3,
	BAM_DMA_WEIGHT_LOW = 1,
	BAM_DMA_WEIGHT_DEFAULT = BAM_DMA_WEIGHT_LOW,
	BAM_DMA_WEIGHT_DISABLE = 0,
	};


	/* Invalid pipe index value */
	#define SPS_BAM_PIPE_INVALID ((u32)(-1))

	/* Parameters for sps_bam_pipe_connect() */
	struct sps_bam_connect_param {
	/* which end point must be initialized */
	enum sps_mode mode;

	/* OR'd connection end point options (see SPS_O defines) */
	u32 options;

	/* SETPEND/MTI interrupt generation parameters */
	u32 irq_gen_addr;
	u32 irq_gen_data;

	};

	/* Event registration struct */
	struct sps_bam_event_reg {
	/* Client's event object handle */
	struct completion *xfer_done;
	void (callback)(struct sps_event_notify notify);

	/* Event trigger mode */
	enum sps_trigger mode;

	/* User pointer that will be provided in event payload data */
	void *user;

	};

	/* Descriptor FIFO cache entry */
	struct sps_bam_desc_cache {
	struct sps_iovec iovec;
	void user; / User pointer registered with this transfer */
	};

	/* Forward declaration */
	struct sps_bam;

	/* System mode control */
	struct sps_bam_sys_mode {
	/* Descriptor FIFO control */
	u8 desc_buf; / Descriptor FIFO for BAM pipe */
	u32 desc_offset; /* Next new descriptor to be written to hardware */
	u32 acked_offset; /* Next descriptor to be retired by software */

	/* Descriptor cache control (!no_queue only) */
	u8 desc_cache; / Software cache of descriptor FIFO contents */
	u32 cache_offset; /* Next descriptor to be cached (ack_xfers only) */

	/* User pointers associated with cached descriptors */
	void **user_ptrs;

	/* Event handling */
	struct sps_bam_event_reg event_regs[SPS_EVENT_INDEX(SPS_EVENT_MAX)];
	struct list_head events_q;

	struct sps_q_event event; /* Temp storage for event creation */
	int no_queue; /* Whether events are queued */
	int ack_xfers; /* Whether client must ACK all descriptors */
	int handler_eot; /* Whether EOT handling is in progress (debug) */

	/* Statistics */
	#ifdef SPS_BAM_STATISTICS
	u32 desc_wr_count;
	u32 desc_rd_count;
	u32 user_ptrs_count;
	u32 user_found;
	u32 int_flags;
	u32 eot_flags;
	u32 callback_events;
	u32 wait_events;
	u32 queued_events;
	u32 get_events;
	u32 get_iovecs;
	#endif /* SPS_BAM_STATISTICS */
	};

	/* BAM pipe descriptor */
	struct sps_pipe {
	struct list_head list;

	/* Client state */
	u32 client_state;
	struct sps_bam *bam;
	struct sps_connect connect;
	const struct sps_connection *map;

	/* Pipe parameters */
	u32 state;
	u32 pipe_index;
	u32 pipe_index_mask;
	u32 irq_mask;
	int polled;
	int hybrid;
	bool late_eot;
	u32 irq_gen_addr;
	enum sps_mode mode;
	u32 num_descs; /* Size (number of elements) of descriptor FIFO */
	u32 desc_size; /* Size (bytes) of descriptor FIFO */
	int wake_up_is_one_shot; /* Whether WAKEUP event is a one-shot or not */

	/* System mode control */
	struct sps_bam_sys_mode sys;

	bool disconnecting;
	};

	/* BAM device descriptor */
	struct sps_bam {
	struct list_head list;

	/* BAM device properties, including connection defaults */
	struct sps_bam_props props;

	/* BAM device state */
	u32 state;
	struct mutex lock;
	void __iomem base; / BAM virtual base address */
	u32 version;
	spinlock_t isr_lock;
	spinlock_t connection_lock;
	unsigned long irqsave_flags;

	/* Pipe state */
	u32 pipe_active_mask;
	u32 pipe_remote_mask;
	struct sps_pipe *pipes[BAM_MAX_PIPES];
	struct list_head pipes_q;

	/* Statistics */
	u32 irq_from_disabled_pipe;
	u32 event_trigger_failures;

	void *ipc_log0;
	void *ipc_log1;
	void *ipc_log2;
	void *ipc_log3;
	void *ipc_log4;

	u32 ipc_loglevel;

	/* Desc cache pointers */
	u8 *desc_cache_pointers[BAM_MAX_PIPES];
	};

	/**
	* BAM driver initialization
	*
	* This function initializes the BAM driver.
	*
	* @options - driver options bitflags (see SPS_OPT_*)
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_driver_init(u32 options);

	/**
	* BAM device initialization
	*
	* This function initializes a BAM device.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_device_init(struct sps_bam *dev);

	/**
	* BAM device de-initialization
	*
	* This function de-initializes a BAM device.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_device_de_init(struct sps_bam *dev);

	/**
	* BAM device reset
	*
	* This Function resets a BAM device.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_reset(struct sps_bam *dev);

	/**
	* BAM device enable
	*
	* This function enables a BAM device.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_enable(struct sps_bam *dev);

	/**
	* BAM device disable
	*
	* This Function disables a BAM device.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_disable(struct sps_bam *dev);

	/**
	* Allocate a BAM pipe
	*
	* This function allocates a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - client-specified pipe index, or SPS_BAM_PIPE_INVALID if
	* any available pipe is acceptable
	*
	* @return - allocated pipe index, or SPS_BAM_PIPE_INVALID on error
	*
	*/
	u32 sps_bam_pipe_alloc(struct sps_bam *dev, u32 pipe_index);

	/**
	* Free a BAM pipe
	*
	* This function frees a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	*/
	void sps_bam_pipe_free(struct sps_bam *dev, u32 pipe_index);

	/**
	* Establish BAM pipe connection
	*
	* This function establishes a connection for a BAM pipe (end point).
	*
	* @client - pointer to client pipe state struct
	*
	* @params - connection parameters
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_connect(struct sps_pipe *client,
	const struct sps_bam_connect_param *params);

	/**
	* Disconnect a BAM pipe connection
	*
	* This function disconnects a connection for a BAM pipe (end point).
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_disconnect(struct sps_bam *dev, u32 pipe_index);

	/**
	* Set BAM pipe parameters
	*
	* This function sets parameters for a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @options - bitflag options (see SPS_O_*)
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_set_params(struct sps_bam *dev, u32 pipe_index, u32 options);

	/**
	* Enable a BAM pipe
	*
	* This function enables a BAM pipe. Note that this function
	* is separate from the pipe connect function to allow proper
	* sequencing of consumer enable followed by producer enable.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_enable(struct sps_bam *dev, u32 pipe_index);

	/**
	* Disable a BAM pipe
	*
	* This function disables a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_disable(struct sps_bam *dev, u32 pipe_index);

	/**
	* Register an event for a BAM pipe
	*
	* This function registers an event for a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @reg - pointer to event registration struct
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_reg_event(struct sps_bam *dev, u32 pipe_index,
	struct sps_register_event *reg);

	/**
	* Submit a transfer of a single buffer to a BAM pipe
	*
	* This function submits a transfer of a single buffer to a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @addr - physical address of buffer to transfer
	*
	* @size - number of bytes to transfer
	*
	* @user - user pointer to register for event
	*
	* @flags - descriptor flags (see SPS_IOVEC_FLAG defines)
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_transfer_one(struct sps_bam *dev, u32 pipe_index, u32 addr,
	u32 size, void *user, u32 flags);

	/**
	* Submit a transfer to a BAM pipe
	*
	* This function submits a transfer to a BAM pipe.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @transfer - pointer to transfer struct
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_transfer(struct sps_bam *dev, u32 pipe_index,
	struct sps_transfer *transfer);

	/**
	* Get a BAM pipe event
	*
	* This function polls for a BAM pipe event.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @notify - pointer to event notification struct
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_get_event(struct sps_bam *dev, u32 pipe_index,
	struct sps_event_notify *notify);

	/**
	* Get processed I/O vector
	*
	* This function fetches the next processed I/O vector.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @iovec - Pointer to I/O vector struct (output).
	* This struct will be zeroed if there are no more processed I/O vectors.
	*
	* @return 0 on success, negative value on error
	*/
	int sps_bam_pipe_get_iovec(struct sps_bam *dev, u32 pipe_index,
	struct sps_iovec *iovec);

	/**
	* Determine whether a BAM pipe descriptor FIFO is empty
	*
	* This function returns the empty state of a BAM pipe descriptor FIFO.
	*
	* The pipe mutex must be locked before calling this function.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @empty - pointer to client's empty status word (boolean)
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_is_empty(struct sps_bam dev, u32 pipe_index, u32 empty);

	/**
	* Get number of free slots in a BAM pipe descriptor FIFO
	*
	* This function returns the number of free slots in a BAM pipe descriptor FIFO.
	*
	* The pipe mutex must be locked before calling this function.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @count - pointer to count status
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_get_free_count(struct sps_bam dev, u32 pipe_index, u32 count);

	/**
	* Set BAM pipe to satellite ownership
	*
	* This function sets the BAM pipe to satellite ownership.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_set_satellite(struct sps_bam *dev, u32 pipe_index);

	/**
	* Perform BAM pipe timer control
	*
	* This function performs BAM pipe timer control operations.
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @timer_ctrl - Pointer to timer control specification
	*
	* @timer_result - Pointer to buffer for timer operation result.
	* This argument can be NULL if no result is expected for the operation.
	* If non-NULL, the current timer value will always provided.
	*
	* @return 0 on success, negative value on error
	*
	*/
	int sps_bam_pipe_timer_ctrl(struct sps_bam *dev, u32 pipe_index,
	struct sps_timer_ctrl *timer_ctrl,
	struct sps_timer_result *timer_result);


	/**
	* Get the number of unused descriptors in the descriptor FIFO
	* of a pipe
	*
	* @dev - pointer to BAM device descriptor
	*
	* @pipe_index - pipe index
	*
	* @desc_num - number of unused descriptors
	*
	*/
	int sps_bam_pipe_get_unused_desc_num(struct sps_bam *dev, u32 pipe_index,
	u32 *desc_num);

	/*
	* sps_bam_check_irq - check IRQ of a BAM device.
	* @dev - pointer to BAM device descriptor
	*
	* This function checks any pending interrupt of a BAM device.
	*
	* Return: 0 on success, negative value on error
	*/
	int sps_bam_check_irq(struct sps_bam *dev);

	/*
	* sps_bam_pipe_pending_desc - checking pending descriptor.
	* @dev: BAM device handle
	* @pipe_index: pipe index
	*
	* This function checks if a pipe of a BAM has any pending descriptor.
	*
	* @return true if there is any desc pending
	*/
	bool sps_bam_pipe_pending_desc(struct sps_bam *dev, u32 pipe_index);

	/*
	* sps_bam_pipe_inject_zlt - inject a ZLT with EOT.
	* @dev: BAM device handle
	* @pipe_index: pipe index
	*
	* This function injects a ZLT with EOT for a pipe of a BAM.
	*
	* Return: 0 on success, negative value on error
	*/
	int sps_bam_pipe_inject_zlt(struct sps_bam *dev, u32 pipe_index);
	#endif /* _SPSBAM_H_ */