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/*
* linux/drivers/mmc/host/msm_sdcc_dml.h - Qualcomm SDCC DML driver
* header file
*
* Copyright (c) 2011, 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.
*
*/
#ifndef _MSM_SDCC_DML_H
#define _MSM_SDCC_DML_H
#include <linux/types.h>
#include <linux/mmc/host.h>
#include "msm_sdcc.h"
#ifdef CONFIG_MMC_MSM_SPS_SUPPORT
/**
* Initialize DML HW connected with SDCC core
*
* This function initialize DML HW.
*
* This function should only be called once
* typically during driver probe.
*
* @host - Pointer to sdcc host structure
*
* @return - 0 if successful else negative value.
*
*/
int msmsdcc_dml_init(struct msmsdcc_host *host);
/**
* Start data transfer.
*
* This function configure DML HW registers with
* data transfer direction and data transfer size.
*
* This function should be called after submitting
* data transfer request to SPS HW and before kick
* starting data transfer in SDCC core.
*
* @host - Pointer to sdcc host structure
* @data - Pointer to mmc_data structure
*
*/
void msmsdcc_dml_start_xfer(struct msmsdcc_host *host, struct mmc_data *data);
/**
* Checks if DML HW is busy or not?
*
* @host - Pointer to sdcc host structure
*
* @return - 1 if DML HW is busy with data transfer
* 0 if DML HW is IDLE.
*
*/
bool msmsdcc_is_dml_busy(struct msmsdcc_host *host);
/**
* Soft reset DML HW
*
* This function give soft reset to DML HW.
*
* This function should be called to reset DML HW
* if data transfer error is detected.
*
* @host - Pointer to sdcc host structure
*
*/
void msmsdcc_dml_reset(struct msmsdcc_host *host);
/**
* Deinitialize DML HW connected with SDCC core
*
* This function resets DML HW and unmap DML
* register region.
*
* This function should only be called once
* typically during driver remove.
*
* @host - Pointer to sdcc host structure
*
*/
void msmsdcc_dml_exit(struct msmsdcc_host *host);
#else
static inline int msmsdcc_dml_init(struct msmsdcc_host *host) { return 0; }
static inline int msmsdcc_dml_start_xfer(struct msmsdcc_host *host,
struct mmc_data *data) { return 0; }
static inline bool msmsdcc_is_dml_busy(
struct msmsdcc_host *host) { return 0; }
static inline void msmsdcc_dml_reset(struct msmsdcc_host *host) { }
static inline void msmsdcc_dml_exit(struct msmsdcc_host *host) { }
#endif /* CONFIG_MMC_MSM_SPS_SUPPORT */
#endif /* _MSM_SDCC_DML_H */
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