You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
616 lines
14 KiB
616 lines
14 KiB
/* Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
/*
|
|
* 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_ */
|
|
|