2 * linux/drivers/mmc/core/sdio_bus.c
4 * Copyright 2007 Pierre Ossman
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
11 * SDIO function driver model
14 #include <linux/device.h>
15 #include <linux/err.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/sdio_func.h>
22 #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)
25 * This currently matches any SDIO function to any driver in order
26 * to help initial development and testing.
28 static int sdio_bus_match(struct device *dev, struct device_driver *drv)
34 sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
42 static int sdio_bus_probe(struct device *dev)
47 static int sdio_bus_remove(struct device *dev)
52 static struct bus_type sdio_bus_type = {
54 .match = sdio_bus_match,
55 .uevent = sdio_bus_uevent,
56 .probe = sdio_bus_probe,
57 .remove = sdio_bus_remove,
60 int sdio_register_bus(void)
62 return bus_register(&sdio_bus_type);
65 void sdio_unregister_bus(void)
67 bus_unregister(&sdio_bus_type);
70 static void sdio_release_func(struct device *dev)
72 struct sdio_func *func = dev_to_sdio_func(dev);
78 * Allocate and initialise a new SDIO function structure.
80 struct sdio_func *sdio_alloc_func(struct mmc_card *card)
82 struct sdio_func *func;
84 func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL);
86 return ERR_PTR(-ENOMEM);
88 memset(func, 0, sizeof(struct sdio_func));
92 device_initialize(&func->dev);
94 func->dev.parent = &card->dev;
95 func->dev.bus = &sdio_bus_type;
96 func->dev.release = sdio_release_func;
102 * Register a new SDIO function with the driver model.
104 int sdio_add_func(struct sdio_func *func)
108 snprintf(func->dev.bus_id, sizeof(func->dev.bus_id),
109 "%s:%d", mmc_card_id(func->card), func->num);
111 ret = device_add(&func->dev);
113 sdio_func_set_present(func);
119 * Unregister a SDIO function with the driver model, and
120 * (eventually) free it.
122 void sdio_remove_func(struct sdio_func *func)
124 if (sdio_func_present(func))
125 device_del(&func->dev);
127 put_device(&func->dev);