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>
23 #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)
24 #define to_sdio_driver(d) container_of(d, struct sdio_driver, drv)
26 static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
27 const struct sdio_device_id *id)
29 if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class)
31 if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor)
33 if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device)
38 static const struct sdio_device_id *sdio_match_device(struct sdio_func *func,
39 struct sdio_driver *sdrv)
41 const struct sdio_device_id *ids;
46 while (ids->class || ids->vendor || ids->device) {
47 if (sdio_match_one(func, ids))
56 static int sdio_bus_match(struct device *dev, struct device_driver *drv)
58 struct sdio_func *func = dev_to_sdio_func(dev);
59 struct sdio_driver *sdrv = to_sdio_driver(drv);
61 if (sdio_match_device(func, sdrv))
68 sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
71 struct sdio_func *func = dev_to_sdio_func(dev);
72 int i = 0, length = 0;
74 if (add_uevent_var(envp, num_envp, &i,
75 buf, buf_size, &length,
76 "SDIO_CLASS=%02X", func->class))
79 if (add_uevent_var(envp, num_envp, &i,
80 buf, buf_size, &length,
81 "SDIO_ID=%04X:%04X", func->vendor, func->device))
84 if (add_uevent_var(envp, num_envp, &i,
85 buf, buf_size, &length,
86 "MODALIAS=sdio:c%02Xv%04Xd%04X",
87 func->class, func->vendor, func->device))
95 static int sdio_bus_probe(struct device *dev)
97 struct sdio_driver *drv = to_sdio_driver(dev->driver);
98 struct sdio_func *func = dev_to_sdio_func(dev);
99 const struct sdio_device_id *id;
101 id = sdio_match_device(func, drv);
105 return drv->probe(func, id);
108 static int sdio_bus_remove(struct device *dev)
110 struct sdio_driver *drv = to_sdio_driver(dev->driver);
111 struct sdio_func *func = dev_to_sdio_func(dev);
118 static struct bus_type sdio_bus_type = {
120 .match = sdio_bus_match,
121 .uevent = sdio_bus_uevent,
122 .probe = sdio_bus_probe,
123 .remove = sdio_bus_remove,
126 int sdio_register_bus(void)
128 return bus_register(&sdio_bus_type);
131 void sdio_unregister_bus(void)
133 bus_unregister(&sdio_bus_type);
137 * sdio_register_driver - register a function driver
138 * @drv: SDIO function driver
140 int sdio_register_driver(struct sdio_driver *drv)
142 drv->drv.name = drv->name;
143 drv->drv.bus = &sdio_bus_type;
144 return driver_register(&drv->drv);
146 EXPORT_SYMBOL_GPL(sdio_register_driver);
149 * sdio_unregister_driver - unregister a function driver
150 * @drv: SDIO function driver
152 void sdio_unregister_driver(struct sdio_driver *drv)
154 drv->drv.bus = &sdio_bus_type;
155 driver_unregister(&drv->drv);
157 EXPORT_SYMBOL_GPL(sdio_unregister_driver);
159 static void sdio_release_func(struct device *dev)
161 struct sdio_func *func = dev_to_sdio_func(dev);
163 sdio_free_func_cis(func);
169 * Allocate and initialise a new SDIO function structure.
171 struct sdio_func *sdio_alloc_func(struct mmc_card *card)
173 struct sdio_func *func;
175 func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL);
177 return ERR_PTR(-ENOMEM);
179 memset(func, 0, sizeof(struct sdio_func));
183 device_initialize(&func->dev);
185 func->dev.parent = &card->dev;
186 func->dev.bus = &sdio_bus_type;
187 func->dev.release = sdio_release_func;
193 * Register a new SDIO function with the driver model.
195 int sdio_add_func(struct sdio_func *func)
199 snprintf(func->dev.bus_id, sizeof(func->dev.bus_id),
200 "%s:%d", mmc_card_id(func->card), func->num);
202 ret = device_add(&func->dev);
204 sdio_func_set_present(func);
210 * Unregister a SDIO function with the driver model, and
211 * (eventually) free it.
213 void sdio_remove_func(struct sdio_func *func)
215 if (sdio_func_present(func))
216 device_del(&func->dev);
218 put_device(&func->dev);