106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
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/*
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* linux/drivers/mmc/host/msm_sdcc_dml.h - Qualcomm SDCC DML driver
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* header file
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*
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* Copyright (c) 2011, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _MSM_SDCC_DML_H
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#define _MSM_SDCC_DML_H
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#include <linux/types.h>
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#include <linux/mmc/host.h>
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#include "msm_sdcc.h"
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#ifdef CONFIG_MMC_MSM_SPS_SUPPORT
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/**
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* Initialize DML HW connected with SDCC core
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*
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* This function initialize DML HW.
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*
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* This function should only be called once
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* typically during driver probe.
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*
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* @host - Pointer to sdcc host structure
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*
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* @return - 0 if successful else negative value.
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*
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*/
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int msmsdcc_dml_init(struct msmsdcc_host *host);
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/**
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* Start data transfer.
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*
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* This function configure DML HW registers with
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* data transfer direction and data transfer size.
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*
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* This function should be called after submitting
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* data transfer request to SPS HW and before kick
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* starting data transfer in SDCC core.
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*
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* @host - Pointer to sdcc host structure
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* @data - Pointer to mmc_data structure
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*
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*/
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void msmsdcc_dml_start_xfer(struct msmsdcc_host *host, struct mmc_data *data);
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/**
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* Checks if DML HW is busy or not?
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*
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* @host - Pointer to sdcc host structure
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*
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* @return - 1 if DML HW is busy with data transfer
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* 0 if DML HW is IDLE.
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*
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*/
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bool msmsdcc_is_dml_busy(struct msmsdcc_host *host);
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/**
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* Soft reset DML HW
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*
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* This function give soft reset to DML HW.
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*
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* This function should be called to reset DML HW
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* if data transfer error is detected.
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*
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* @host - Pointer to sdcc host structure
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*
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*/
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void msmsdcc_dml_reset(struct msmsdcc_host *host);
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/**
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* Deinitialize DML HW connected with SDCC core
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*
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* This function resets DML HW and unmap DML
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* register region.
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*
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* This function should only be called once
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* typically during driver remove.
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*
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* @host - Pointer to sdcc host structure
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*
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*/
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void msmsdcc_dml_exit(struct msmsdcc_host *host);
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#else
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static inline int msmsdcc_dml_init(struct msmsdcc_host *host) { return 0; }
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static inline int msmsdcc_dml_start_xfer(struct msmsdcc_host *host,
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struct mmc_data *data) { return 0; }
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static inline bool msmsdcc_is_dml_busy(
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struct msmsdcc_host *host) { return 0; }
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static inline void msmsdcc_dml_reset(struct msmsdcc_host *host) { }
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static inline void msmsdcc_dml_exit(struct msmsdcc_host *host) { }
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#endif /* CONFIG_MMC_MSM_SPS_SUPPORT */
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#endif /* _MSM_SDCC_DML_H */
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