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 static 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;
133 id = sdio_match_device(func, drv);
137 /* Set the default block size so the driver is sure it's something
139 sdio_claim_host(func);
140 ret = sdio_set_block_size(func, 0);
141 sdio_release_host(func);
145 return drv->probe(func, id);
148 static int sdio_bus_remove(struct device *dev)
150 struct sdio_driver *drv = to_sdio_driver(dev->driver);
151 struct sdio_func *func = dev_to_sdio_func(dev);
155 if (func->irq_handler) {
156 printk(KERN_WARNING "WARNING: driver %s did not remove "
157 "its interrupt handler!\n", drv->name);
158 sdio_claim_host(func);
159 sdio_release_irq(func);
160 sdio_release_host(func);
166 static struct bus_type sdio_bus_type = {
168 .dev_attrs = sdio_dev_attrs,
169 .match = sdio_bus_match,
170 .uevent = sdio_bus_uevent,
171 .probe = sdio_bus_probe,
172 .remove = sdio_bus_remove,
175 int sdio_register_bus(void)
177 return bus_register(&sdio_bus_type);
180 void sdio_unregister_bus(void)
182 bus_unregister(&sdio_bus_type);
186 * sdio_register_driver - register a function driver
187 * @drv: SDIO function driver
189 int sdio_register_driver(struct sdio_driver *drv)
191 drv->drv.name = drv->name;
192 drv->drv.bus = &sdio_bus_type;
193 return driver_register(&drv->drv);
195 EXPORT_SYMBOL_GPL(sdio_register_driver);
198 * sdio_unregister_driver - unregister a function driver
199 * @drv: SDIO function driver
201 void sdio_unregister_driver(struct sdio_driver *drv)
203 drv->drv.bus = &sdio_bus_type;
204 driver_unregister(&drv->drv);
206 EXPORT_SYMBOL_GPL(sdio_unregister_driver);
208 static void sdio_release_func(struct device *dev)
210 struct sdio_func *func = dev_to_sdio_func(dev);
212 sdio_free_func_cis(func);
221 * Allocate and initialise a new SDIO function structure.
223 struct sdio_func *sdio_alloc_func(struct mmc_card *card)
225 struct sdio_func *func;
227 func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL);
229 return ERR_PTR(-ENOMEM);
233 device_initialize(&func->dev);
235 func->dev.parent = &card->dev;
236 func->dev.bus = &sdio_bus_type;
237 func->dev.release = sdio_release_func;
243 * Register a new SDIO function with the driver model.
245 int sdio_add_func(struct sdio_func *func)
249 snprintf(func->dev.bus_id, sizeof(func->dev.bus_id),
250 "%s:%d", mmc_card_id(func->card), func->num);
252 ret = device_add(&func->dev);
254 sdio_func_set_present(func);
260 * Unregister a SDIO function with the driver model, and
261 * (eventually) free it.
263 void sdio_remove_func(struct sdio_func *func)
265 if (sdio_func_present(func))
266 device_del(&func->dev);
268 put_device(&func->dev);