2 * linux/drivers/mmc/core/bus.c
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
5 * Copyright (C) 2007 Pierre Ossman
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * MMC card bus driver model
14 #include <linux/device.h>
15 #include <linux/err.h>
16 #include <linux/slab.h>
17 #include <linux/pm_runtime.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/host.h>
26 #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
28 static ssize_t mmc_type_show(struct device *dev,
29 struct device_attribute *attr, char *buf)
31 struct mmc_card *card = mmc_dev_to_card(dev);
35 return sprintf(buf, "MMC\n");
37 return sprintf(buf, "SD\n");
39 return sprintf(buf, "SDIO\n");
40 case MMC_TYPE_SD_COMBO:
41 return sprintf(buf, "SDcombo\n");
47 static struct device_attribute mmc_dev_attrs[] = {
48 __ATTR(type, S_IRUGO, mmc_type_show, NULL),
53 * This currently matches any MMC driver to any MMC card - drivers
54 * themselves make the decision whether to drive this card in their
57 static int mmc_bus_match(struct device *dev, struct device_driver *drv)
63 mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
65 struct mmc_card *card = mmc_dev_to_card(dev);
79 case MMC_TYPE_SD_COMBO:
87 retval = add_uevent_var(env, "MMC_TYPE=%s", type);
92 retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
97 * Request the mmc_block device. Note: that this is a direct request
98 * for the module it carries no information as to what is inserted.
100 retval = add_uevent_var(env, "MODALIAS=mmc:block");
105 static int mmc_bus_probe(struct device *dev)
107 struct mmc_driver *drv = to_mmc_driver(dev->driver);
108 struct mmc_card *card = mmc_dev_to_card(dev);
110 return drv->probe(card);
113 static int mmc_bus_remove(struct device *dev)
115 struct mmc_driver *drv = to_mmc_driver(dev->driver);
116 struct mmc_card *card = mmc_dev_to_card(dev);
123 static int mmc_bus_pm_suspend(struct device *dev)
125 struct mmc_driver *drv = to_mmc_driver(dev->driver);
126 struct mmc_card *card = mmc_dev_to_card(dev);
128 pm_message_t state = { PM_EVENT_SUSPEND };
130 if (dev->driver && drv->suspend)
131 ret = drv->suspend(card, state);
135 static int mmc_bus_pm_resume(struct device *dev)
137 struct mmc_driver *drv = to_mmc_driver(dev->driver);
138 struct mmc_card *card = mmc_dev_to_card(dev);
141 if (dev->driver && drv->resume)
142 ret = drv->resume(card);
146 #ifdef CONFIG_PM_RUNTIME
147 static int mmc_runtime_suspend(struct device *dev)
149 struct mmc_card *card = mmc_dev_to_card(dev);
151 return mmc_power_save_host(card->host);
154 static int mmc_runtime_resume(struct device *dev)
156 struct mmc_card *card = mmc_dev_to_card(dev);
158 return mmc_power_restore_host(card->host);
161 static int mmc_runtime_idle(struct device *dev)
163 return pm_runtime_suspend(dev);
165 #endif /* CONFIG_PM_RUNTIME */
167 static const struct dev_pm_ops mmc_bus_pm_ops = {
168 SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_pm_suspend, mmc_bus_pm_resume)
169 SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, mmc_runtime_idle)
172 static struct bus_type mmc_bus_type = {
174 .dev_attrs = mmc_dev_attrs,
175 .match = mmc_bus_match,
176 .uevent = mmc_bus_uevent,
177 .probe = mmc_bus_probe,
178 .remove = mmc_bus_remove,
179 .pm = &mmc_bus_pm_ops,
182 int mmc_register_bus(void)
184 return bus_register(&mmc_bus_type);
187 void mmc_unregister_bus(void)
189 bus_unregister(&mmc_bus_type);
193 * mmc_register_driver - register a media driver
194 * @drv: MMC media driver
196 int mmc_register_driver(struct mmc_driver *drv)
198 drv->drv.bus = &mmc_bus_type;
199 return driver_register(&drv->drv);
202 EXPORT_SYMBOL(mmc_register_driver);
205 * mmc_unregister_driver - unregister a media driver
206 * @drv: MMC media driver
208 void mmc_unregister_driver(struct mmc_driver *drv)
210 drv->drv.bus = &mmc_bus_type;
211 driver_unregister(&drv->drv);
214 EXPORT_SYMBOL(mmc_unregister_driver);
216 static void mmc_release_card(struct device *dev)
218 struct mmc_card *card = mmc_dev_to_card(dev);
220 sdio_free_common_cis(card);
229 * Allocate and initialise a new MMC card structure.
231 struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
233 struct mmc_card *card;
235 card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
237 return ERR_PTR(-ENOMEM);
241 device_initialize(&card->dev);
243 card->dev.parent = mmc_classdev(host);
244 card->dev.bus = &mmc_bus_type;
245 card->dev.release = mmc_release_card;
246 card->dev.type = type;
252 * Register a new MMC card with the driver model.
254 int mmc_add_card(struct mmc_card *card)
259 dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
261 switch (card->type) {
267 if (mmc_card_blockaddr(card)) {
268 if (mmc_card_ext_capacity(card))
277 case MMC_TYPE_SD_COMBO:
279 if (mmc_card_blockaddr(card))
287 if (mmc_host_is_spi(card->host)) {
288 printk(KERN_INFO "%s: new %s%s%s card on SPI\n",
289 mmc_hostname(card->host),
290 mmc_card_highspeed(card) ? "high speed " : "",
291 mmc_card_ddr_mode(card) ? "DDR " : "",
294 printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
295 mmc_hostname(card->host),
296 mmc_sd_card_uhs(card) ? "ultra high speed " :
297 (mmc_card_highspeed(card) ? "high speed " : ""),
298 mmc_card_ddr_mode(card) ? "DDR " : "",
302 #ifdef CONFIG_DEBUG_FS
303 mmc_add_card_debugfs(card);
306 ret = device_add(&card->dev);
310 mmc_card_set_present(card);
316 * Unregister a new MMC card with the driver model, and
317 * (eventually) free it.
319 void mmc_remove_card(struct mmc_card *card)
321 #ifdef CONFIG_DEBUG_FS
322 mmc_remove_card_debugfs(card);
325 if (mmc_card_present(card)) {
326 if (mmc_host_is_spi(card->host)) {
327 printk(KERN_INFO "%s: SPI card removed\n",
328 mmc_hostname(card->host));
330 printk(KERN_INFO "%s: card %04x removed\n",
331 mmc_hostname(card->host), card->rca);
333 device_del(&card->dev);
336 put_device(&card->dev);