forked from mirrors/linux
94cd101100
Modules registering driver with sdio_register_driver() might
forget to set .owner field. The field is used by some of other kernel
parts for reference counting (try_module_get()), so it is expected that
drivers will set it.
Solve the problem by moving this task away from the drivers to the core
code, just like we did for platform_driver in
commit 9447057eaf ("platform_device: use a macro instead of
platform_driver_register").
Since many drivers forget to set the .owner, this effectively will fix
them. Examples of fixed drivers are: ath6kl, b43, btsdio.c, ks7010,
libertas, MediaTek WiFi drivers, Realtek WiFi drivers, rsi, siano,
wilc1000, wl1251 and more.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20240329-module-owner-sdio-v1-1-e4010b11ccaa@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
181 lines
5.6 KiB
C
181 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* include/linux/mmc/sdio_func.h
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*
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* Copyright 2007-2008 Pierre Ossman
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*/
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#ifndef LINUX_MMC_SDIO_FUNC_H
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#define LINUX_MMC_SDIO_FUNC_H
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/mmc/pm.h>
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struct mmc_card;
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struct sdio_func;
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typedef void (sdio_irq_handler_t)(struct sdio_func *);
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/*
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* SDIO function CIS tuple (unknown to the core)
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*/
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struct sdio_func_tuple {
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struct sdio_func_tuple *next;
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unsigned char code;
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unsigned char size;
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unsigned char data[];
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};
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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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sdio_irq_handler_t *irq_handler; /* IRQ callback */
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unsigned int num; /* function number */
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unsigned char class; /* standard interface class */
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unsigned short vendor; /* vendor id */
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unsigned short device; /* device id */
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unsigned max_blksize; /* maximum block size */
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unsigned cur_blksize; /* current block size */
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unsigned enable_timeout; /* max enable timeout in msec */
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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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u8 *tmpbuf; /* DMA:able scratch buffer */
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u8 major_rev; /* major revision number */
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u8 minor_rev; /* minor revision number */
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unsigned num_info; /* number of info strings */
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const char **info; /* info strings */
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struct sdio_func_tuple *tuples;
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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) (dev_name(&(f)->dev))
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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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#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)
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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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const struct sdio_device_id *id_table;
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int (*probe)(struct sdio_func *, const struct sdio_device_id *);
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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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/**
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* SDIO_DEVICE - macro used to describe a specific SDIO device
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* @vend: the 16 bit manufacturer code
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* @dev: the 16 bit function id
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*
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* This macro is used to create a struct sdio_device_id that matches a
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* specific device. The class field will be set to SDIO_ANY_ID.
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*/
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#define SDIO_DEVICE(vend,dev) \
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.class = SDIO_ANY_ID, \
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.vendor = (vend), .device = (dev)
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/**
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* SDIO_DEVICE_CLASS - macro used to describe a specific SDIO device class
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* @dev_class: the 8 bit standard interface code
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*
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* This macro is used to create a struct sdio_device_id that matches a
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* specific standard SDIO function type. The vendor and device fields will
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* be set to SDIO_ANY_ID.
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*/
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#define SDIO_DEVICE_CLASS(dev_class) \
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.class = (dev_class), \
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.vendor = SDIO_ANY_ID, .device = SDIO_ANY_ID
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/* use a macro to avoid include chaining to get THIS_MODULE */
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#define sdio_register_driver(drv) \
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__sdio_register_driver(drv, THIS_MODULE)
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extern int __sdio_register_driver(struct sdio_driver *, struct module *);
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extern void sdio_unregister_driver(struct sdio_driver *);
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/**
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* module_sdio_driver() - Helper macro for registering a SDIO driver
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* @__sdio_driver: sdio_driver struct
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*
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* Helper macro for SDIO drivers which do not do anything special in module
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* init/exit. This eliminates a lot of boilerplate. Each module may only
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* use this macro once, and calling it replaces module_init() and module_exit()
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*/
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#define module_sdio_driver(__sdio_driver) \
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module_driver(__sdio_driver, sdio_register_driver, \
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sdio_unregister_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 int sdio_set_block_size(struct sdio_func *func, unsigned blksz);
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extern int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler);
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extern int sdio_release_irq(struct sdio_func *func);
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extern unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz);
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extern u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret);
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extern u16 sdio_readw(struct sdio_func *func, unsigned int addr, int *err_ret);
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extern u32 sdio_readl(struct sdio_func *func, unsigned int addr, int *err_ret);
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extern int sdio_memcpy_fromio(struct sdio_func *func, void *dst,
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unsigned int addr, int count);
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extern int sdio_readsb(struct sdio_func *func, void *dst,
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unsigned int addr, int count);
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extern void sdio_writeb(struct sdio_func *func, u8 b,
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unsigned int addr, int *err_ret);
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extern void sdio_writew(struct sdio_func *func, u16 b,
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unsigned int addr, int *err_ret);
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extern void sdio_writel(struct sdio_func *func, u32 b,
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unsigned int addr, int *err_ret);
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extern u8 sdio_writeb_readb(struct sdio_func *func, u8 write_byte,
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unsigned int addr, int *err_ret);
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extern int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr,
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void *src, int count);
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extern int sdio_writesb(struct sdio_func *func, unsigned int addr,
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void *src, int count);
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extern unsigned char sdio_f0_readb(struct sdio_func *func,
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unsigned int addr, int *err_ret);
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extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b,
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unsigned int addr, int *err_ret);
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extern mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func);
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extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags);
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extern void sdio_retune_crc_disable(struct sdio_func *func);
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extern void sdio_retune_crc_enable(struct sdio_func *func);
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extern void sdio_retune_hold_now(struct sdio_func *func);
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extern void sdio_retune_release(struct sdio_func *func);
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#endif /* LINUX_MMC_SDIO_FUNC_H */
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