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 /* show configuration fields */
27 #define sdio_config_attr(field, format_string) \
29 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
31 struct sdio_func *func; \
33 func = dev_to_sdio_func (dev); \
34 return sprintf (buf, format_string, func->field); \
37 sdio_config_attr(class, "0x%02x\n");
38 sdio_config_attr(vendor, "0x%04x\n");
39 sdio_config_attr(device, "0x%04x\n");
41 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
43 struct sdio_func *func = dev_to_sdio_func (dev);
45 return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n",
46 func->class, func->vendor, func->device);
49 struct device_attribute sdio_dev_attrs[] = {
57 static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
58 const struct sdio_device_id *id)
60 if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class)
62 if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor)
64 if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device)
69 static const struct sdio_device_id *sdio_match_device(struct sdio_func *func,
70 struct sdio_driver *sdrv)
72 const struct sdio_device_id *ids;
77 while (ids->class || ids->vendor || ids->device) {
78 if (sdio_match_one(func, ids))
87 static int sdio_bus_match(struct device *dev, struct device_driver *drv)
89 struct sdio_func *func = dev_to_sdio_func(dev);
90 struct sdio_driver *sdrv = to_sdio_driver(drv);
92 if (sdio_match_device(func, sdrv))
99 sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
102 struct sdio_func *func = dev_to_sdio_func(dev);
103 int i = 0, length = 0;
105 if (add_uevent_var(envp, num_envp, &i,
106 buf, buf_size, &length,
107 "SDIO_CLASS=%02X", func->class))
110 if (add_uevent_var(envp, num_envp, &i,
111 buf, buf_size, &length,
112 "SDIO_ID=%04X:%04X", func->vendor, func->device))
115 if (add_uevent_var(envp, num_envp, &i,
116 buf, buf_size, &length,
117 "MODALIAS=sdio:c%02Xv%04Xd%04X",
118 func->class, func->vendor, func->device))
126 static int sdio_bus_probe(struct device *dev)
128 struct sdio_driver *drv = to_sdio_driver(dev->driver);
129 struct sdio_func *func = dev_to_sdio_func(dev);
130 const struct sdio_device_id *id;
132 id = sdio_match_device(func, drv);
136 return drv->probe(func, id);
139 static int sdio_bus_remove(struct device *dev)
141 struct sdio_driver *drv = to_sdio_driver(dev->driver);
142 struct sdio_func *func = dev_to_sdio_func(dev);
149 static struct bus_type sdio_bus_type = {
151 .dev_attrs = sdio_dev_attrs,
152 .match = sdio_bus_match,
153 .uevent = sdio_bus_uevent,
154 .probe = sdio_bus_probe,
155 .remove = sdio_bus_remove,
158 int sdio_register_bus(void)
160 return bus_register(&sdio_bus_type);
163 void sdio_unregister_bus(void)
165 bus_unregister(&sdio_bus_type);
169 * sdio_register_driver - register a function driver
170 * @drv: SDIO function driver
172 int sdio_register_driver(struct sdio_driver *drv)
174 drv->drv.name = drv->name;
175 drv->drv.bus = &sdio_bus_type;
176 return driver_register(&drv->drv);
178 EXPORT_SYMBOL_GPL(sdio_register_driver);
181 * sdio_unregister_driver - unregister a function driver
182 * @drv: SDIO function driver
184 void sdio_unregister_driver(struct sdio_driver *drv)
186 drv->drv.bus = &sdio_bus_type;
187 driver_unregister(&drv->drv);
189 EXPORT_SYMBOL_GPL(sdio_unregister_driver);
191 static void sdio_release_func(struct device *dev)
193 struct sdio_func *func = dev_to_sdio_func(dev);
195 sdio_free_func_cis(func);
201 * Allocate and initialise a new SDIO function structure.
203 struct sdio_func *sdio_alloc_func(struct mmc_card *card)
205 struct sdio_func *func;
207 func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL);
209 return ERR_PTR(-ENOMEM);
211 memset(func, 0, sizeof(struct sdio_func));
215 device_initialize(&func->dev);
217 func->dev.parent = &card->dev;
218 func->dev.bus = &sdio_bus_type;
219 func->dev.release = sdio_release_func;
225 * Register a new SDIO function with the driver model.
227 int sdio_add_func(struct sdio_func *func)
231 snprintf(func->dev.bus_id, sizeof(func->dev.bus_id),
232 "%s:%d", mmc_card_id(func->card), func->num);
234 ret = device_add(&func->dev);
236 sdio_func_set_present(func);
242 * Unregister a SDIO function with the driver model, and
243 * (eventually) free it.
245 void sdio_remove_func(struct sdio_func *func)
247 if (sdio_func_present(func))
248 device_del(&func->dev);
250 put_device(&func->dev);