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When CONFIG_DEBUG_FS is set, create a few files under /sys/kernel/debug containing information about an mmc host's internal state. Currently, just a single file is created, "ios", which contains information about the current operating parameters for the bus (clock speed, bus width, etc.) Host drivers can add additional files and directories under the host's root directory by passing the debugfs_root field in struct mmc_host as the 'parent' parameter to debugfs_create_*. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*
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* linux/drivers/mmc/core/core.h
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*
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* Copyright (C) 2003 Russell King, All Rights Reserved.
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* Copyright 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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _MMC_CORE_CORE_H
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#define _MMC_CORE_CORE_H
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#include <linux/delay.h>
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#define MMC_CMD_RETRIES 3
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struct mmc_bus_ops {
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void (*remove)(struct mmc_host *);
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void (*detect)(struct mmc_host *);
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void (*suspend)(struct mmc_host *);
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void (*resume)(struct mmc_host *);
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};
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void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
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void mmc_detach_bus(struct mmc_host *host);
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void mmc_set_chip_select(struct mmc_host *host, int mode);
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void mmc_set_clock(struct mmc_host *host, unsigned int hz);
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void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
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void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
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u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
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void mmc_set_timing(struct mmc_host *host, unsigned int timing);
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static inline void mmc_delay(unsigned int ms)
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{
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if (ms < 1000 / HZ) {
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cond_resched();
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mdelay(ms);
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} else {
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msleep(ms);
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}
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}
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void mmc_rescan(struct work_struct *work);
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void mmc_start_host(struct mmc_host *host);
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void mmc_stop_host(struct mmc_host *host);
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int mmc_attach_mmc(struct mmc_host *host, u32 ocr);
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int mmc_attach_sd(struct mmc_host *host, u32 ocr);
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int mmc_attach_sdio(struct mmc_host *host, u32 ocr);
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extern int use_spi_crc;
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/* Debugfs information for hosts and cards */
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void mmc_add_host_debugfs(struct mmc_host *host);
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void mmc_remove_host_debugfs(struct mmc_host *host);
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#endif
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