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c769a88d44
The read/write_data() methods write do a single byte access on the data line of a SD card. Rename them as read/write_byte(). Add some documentation (not in "hw/sd/sdcard_legacy.h" which we are going to remove soon). Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200814092346.21825-2-f4bug@amsat.org>
51 lines
2.3 KiB
C
51 lines
2.3 KiB
C
/*
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* SD Memory Card emulation (deprecated legacy API)
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*
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* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
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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
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* are met:
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*
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HW_SDCARD_LEGACY_H
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#define HW_SDCARD_LEGACY_H
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#include "hw/sd/sd.h"
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/* Legacy functions to be used only by non-qdevified callers */
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SDState *sd_init(BlockBackend *blk, bool is_spi);
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int sd_do_command(SDState *card, SDRequest *request, uint8_t *response);
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void sd_write_byte(SDState *card, uint8_t value);
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uint8_t sd_read_byte(SDState *card);
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void sd_set_cb(SDState *card, qemu_irq readonly, qemu_irq insert);
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/* sd_enable should not be used -- it is only used on the nseries boards,
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* where it is part of a broken implementation of the MMC card slot switch
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* (there should be two card slots which are multiplexed to a single MMC
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* controller, but instead we model it with one card and controller and
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* disable the card when the second slot is selected, so it looks like the
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* second slot is always empty).
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*/
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void sd_enable(SDState *card, bool enable);
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#endif /* HW_SDCARD_LEGACY_H */
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