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490ff95f8e
Rather than open coding the polling loop in mmc_interrupt_hpi(), let's convert to use mmc_poll_for_busy(). Note that, moving to mmc_poll_for_busy() for HPI also improves the behaviour according to below. - Adds support for polling via the optional ->card_busy() host ops. - Require R1_READY_FOR_DATA to be set in the CMD13 response before exiting the polling loop. - Adds a throttling mechanism to avoid CPU hogging when polling. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Baolin Wang <baolin.wang7@gmail.com> Tested-by: Ludovic Barre <ludovic.barre@st.com> Reviewed-by: Ludovic Barre <ludovic.barre@st.com> Link: https://lore.kernel.org/r/20200204085449.32585-11-ulf.hansson@linaro.org
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* linux/drivers/mmc/core/mmc_ops.h
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*
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* Copyright 2006-2007 Pierre Ossman
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*/
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#ifndef _MMC_MMC_OPS_H
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#define _MMC_MMC_OPS_H
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#include <linux/types.h>
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enum mmc_busy_cmd {
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MMC_BUSY_CMD6,
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MMC_BUSY_ERASE,
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MMC_BUSY_HPI,
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};
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struct mmc_host;
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struct mmc_card;
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int mmc_select_card(struct mmc_card *card);
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int mmc_deselect_cards(struct mmc_host *host);
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int mmc_set_dsr(struct mmc_host *host);
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int mmc_go_idle(struct mmc_host *host);
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int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
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int mmc_set_relative_addr(struct mmc_card *card);
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int mmc_send_csd(struct mmc_card *card, u32 *csd);
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int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries);
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int mmc_send_status(struct mmc_card *card, u32 *status);
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int mmc_send_cid(struct mmc_host *host, u32 *cid);
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int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
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int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
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int mmc_bus_test(struct mmc_card *card, u8 bus_width);
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int mmc_interrupt_hpi(struct mmc_card *card);
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int mmc_can_ext_csd(struct mmc_card *card);
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int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
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int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal);
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int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
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enum mmc_busy_cmd busy_cmd);
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int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
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unsigned int timeout_ms, unsigned char timing,
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bool send_status, bool retry_crc_err);
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int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
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unsigned int timeout_ms);
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void mmc_run_bkops(struct mmc_card *card);
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int mmc_flush_cache(struct mmc_card *card);
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int mmc_cmdq_enable(struct mmc_card *card);
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int mmc_cmdq_disable(struct mmc_card *card);
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#endif
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