172 lines
4.8 KiB
C
172 lines
4.8 KiB
C
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <mmc_sdhci.h>
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#include <mmc_wrapper.h>
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#include <sdhci.h>
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#include <target.h>
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/*
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* Function: get mmc card
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* Arg : None
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* Return : Pointer to mmc card structure
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* Flow : Get the card pointer from the device structure
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*/
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static struct mmc_card *get_mmc_card()
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{
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struct mmc_device *dev;
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struct mmc_card *card;
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dev = target_mmc_device();
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card = &dev->card;
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return card;
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}
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/*
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* Function: mmc_write
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* Arg : Data address on card, data length, i/p buffer
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* Return : 0 on Success, non zero on failure
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* Flow : Write the data from in to the card
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*/
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uint32_t mmc_write(uint64_t data_addr, uint32_t data_len, void *in)
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{
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int val = 0;
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uint32_t write_size = SDHCI_ADMA_MAX_TRANS_SZ;
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void *sptr = in;
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struct mmc_device *dev;
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dev = target_mmc_device();
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ASSERT(!(data_addr % MMC_BLK_SZ));
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if (data_len % MMC_BLK_SZ)
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data_len = ROUNDUP(data_len, MMC_BLK_SZ);
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/* TODO: This function is aware of max data that can be
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* tranferred using sdhci adma mode, need to have a cleaner
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* implementation to keep this function independent of sdhci
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* limitations
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*/
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while (data_len > write_size) {
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val = mmc_sdhci_write(dev, sptr, (data_addr / MMC_BLK_SZ), (write_size / MMC_BLK_SZ));
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sptr += write_size;
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data_addr += write_size;
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data_len -= write_size;
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}
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if (data_len)
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val = mmc_sdhci_write(dev, sptr, (data_addr / MMC_BLK_SZ), (data_len / MMC_BLK_SZ));
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return val;
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}
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/*
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* Function: mmc_read
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* Arg : Data address on card, o/p buffer & data length
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* Return : 0 on Success, non zero on failure
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* Flow : Read data from the card to out
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*/
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uint32_t mmc_read(uint64_t data_addr, uint32_t *out, uint32_t data_len)
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{
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uint32_t ret = 0;
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uint32_t read_size = SDHCI_ADMA_MAX_TRANS_SZ;
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struct mmc_device *dev;
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void *sptr = out;
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ASSERT(!(data_addr % MMC_BLK_SZ));
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ASSERT(!(data_len % MMC_BLK_SZ));
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dev = target_mmc_device();
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/* TODO: This function is aware of max data that can be
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* tranferred using sdhci adma mode, need to have a cleaner
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* implementation to keep this function independent of sdhci
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* limitations
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*/
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while (data_len > read_size) {
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ret = mmc_sdhci_read(dev, sptr, (data_addr / MMC_BLK_SZ), (read_size / MMC_BLK_SZ));
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sptr += read_size;
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data_addr += read_size;
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data_len -= read_size;
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}
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if (data_len)
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ret = mmc_sdhci_read(dev, sptr, (data_addr / MMC_BLK_SZ), (data_len / MMC_BLK_SZ));
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return ret;
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}
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/*
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* Function: mmc erase card
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* Arg : Block address & length
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* Return : Returns 0
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* Flow : This is dummy API for backward compatibility
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* erase is not supported for sdhci
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*/
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uint32_t mmc_erase_card(uint64_t addr, uint64_t len)
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{
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/* TODO: Right now with sdhci erase function
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* is not implemented, need to be added
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*/
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return 0;
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}
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/*
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* Function: mmc get psn
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* Arg : None
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* Return : Returns the product serial number
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* Flow : Get the PSN from card
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*/
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uint32_t mmc_get_psn(void)
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{
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struct mmc_card *card;
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card = get_mmc_card();
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return card->cid.psn;
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}
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/*
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* Function: mmc get capacity
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* Arg : None
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* Return : Returns the density of the emmc card
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* Flow : Get the density from card
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*/
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uint64_t mmc_get_device_capacity()
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{
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struct mmc_card *card;
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card = get_mmc_card();
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return card->capacity;
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}
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