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f328c76e56
The host may issue an I/O abort by writing to the CCCR at any time during I/O read operation via CMD52. And host may need suspend transcation during write busy stage in SDIO suspend/resume scenario. >From other side, a card may accept CMD52 during data transfer phase. Previous implement would block issuing above command in busy stage. It cause function driver can't implement as proper way and has no opportunity to do some coverage in error case via I/O abort etc. We need bypass some necessary operation during busy check stage. Signed-off-by: Jiajie Hao <jiajie.hao@mediatek.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/*
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* linux/drivers/mmc/sdio_ops.c
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*
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* Copyright 2006-2007 Pierre Ossman
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#ifndef _MMC_SDIO_OPS_H
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#define _MMC_SDIO_OPS_H
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#include <linux/types.h>
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#include <linux/mmc/sdio.h>
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struct mmc_host;
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struct mmc_card;
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int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
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int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
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unsigned addr, u8 in, u8* out);
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int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
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unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz);
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int sdio_reset(struct mmc_host *host);
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unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz);
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static inline bool sdio_is_io_busy(u32 opcode, u32 arg)
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{
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u32 addr;
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addr = (arg >> 9) & 0x1FFFF;
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return (opcode == SD_IO_RW_EXTENDED ||
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(opcode == SD_IO_RW_DIRECT &&
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!(addr == SDIO_CCCR_ABORT || addr == SDIO_CCCR_SUSPEND)));
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}
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#endif
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