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fa64efa1f2
Like many other buses, the devices (functions) on the SDIO bus must be enabled before they can be used. Add functions that allow drivers to do so. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* include/linux/mmc/sdio_func.h
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*
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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 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_FUNC_H
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#define MMC_SDIO_FUNC_H
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struct mmc_card;
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/*
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* SDIO function devices
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*/
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struct sdio_func {
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struct mmc_card *card; /* the card this device belongs to */
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struct device dev; /* the device */
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unsigned int num; /* function number */
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unsigned int state; /* function state */
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#define SDIO_STATE_PRESENT (1<<0) /* present in sysfs */
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};
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#define sdio_func_present(f) ((f)->state & SDIO_STATE_PRESENT)
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#define sdio_func_set_present(f) ((f)->state |= SDIO_STATE_PRESENT)
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#define sdio_func_id(f) ((f)->dev.bus_id)
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#define sdio_get_drvdata(f) dev_get_drvdata(&(f)->dev)
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#define sdio_set_drvdata(f,d) dev_set_drvdata(&(f)->dev, d)
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/*
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* SDIO function device driver
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*/
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struct sdio_driver {
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char *name;
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int (*probe)(struct sdio_func *);
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void (*remove)(struct sdio_func *);
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struct device_driver drv;
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};
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extern int sdio_register_driver(struct sdio_driver *);
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extern void sdio_unregister_driver(struct sdio_driver *);
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/*
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* SDIO I/O operations
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*/
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extern void sdio_claim_host(struct sdio_func *func);
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extern void sdio_release_host(struct sdio_func *func);
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extern int sdio_enable_func(struct sdio_func *func);
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extern int sdio_disable_func(struct sdio_func *func);
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extern unsigned char sdio_readb(struct sdio_func *func,
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unsigned int addr, int *err_ret);
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extern void sdio_writeb(struct sdio_func *func, unsigned char b,
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unsigned int addr, int *err_ret);
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#endif
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