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/export.h>
15 #include <linux/device.h>
16 #include <linux/err.h>
17 #include <linux/slab.h>
18 #include <linux/stat.h>
19 #include <linux/pm_runtime.h>
21 #include <linux/mmc/card.h>
22 #include <linux/mmc/host.h>
28 #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
30 static ssize_t
mmc_type_show(struct device
*dev
,
31 struct device_attribute
*attr
, char *buf
)
33 struct mmc_card
*card
= mmc_dev_to_card(dev
);
37 return sprintf(buf
, "MMC\n");
39 return sprintf(buf
, "SD\n");
41 return sprintf(buf
, "SDIO\n");
42 case MMC_TYPE_SD_COMBO
:
43 return sprintf(buf
, "SDcombo\n");
49 static struct device_attribute mmc_dev_attrs
[] = {
50 __ATTR(type
, S_IRUGO
, mmc_type_show
, NULL
),
55 * This currently matches any MMC driver to any MMC card - drivers
56 * themselves make the decision whether to drive this card in their
59 static int mmc_bus_match(struct device
*dev
, struct device_driver
*drv
)
65 mmc_bus_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
67 struct mmc_card
*card
= mmc_dev_to_card(dev
);
81 case MMC_TYPE_SD_COMBO
:
89 retval
= add_uevent_var(env
, "MMC_TYPE=%s", type
);
94 retval
= add_uevent_var(env
, "MMC_NAME=%s", mmc_card_name(card
));
99 * Request the mmc_block device. Note: that this is a direct request
100 * for the module it carries no information as to what is inserted.
102 retval
= add_uevent_var(env
, "MODALIAS=mmc:block");
107 static int mmc_bus_probe(struct device
*dev
)
109 struct mmc_driver
*drv
= to_mmc_driver(dev
->driver
);
110 struct mmc_card
*card
= mmc_dev_to_card(dev
);
112 return drv
->probe(card
);
115 static int mmc_bus_remove(struct device
*dev
)
117 struct mmc_driver
*drv
= to_mmc_driver(dev
->driver
);
118 struct mmc_card
*card
= mmc_dev_to_card(dev
);
125 static int mmc_bus_suspend(struct device
*dev
, pm_message_t state
)
127 struct mmc_driver
*drv
= to_mmc_driver(dev
->driver
);
128 struct mmc_card
*card
= mmc_dev_to_card(dev
);
131 if (dev
->driver
&& drv
->suspend
)
132 ret
= drv
->suspend(card
, state
);
136 static int mmc_bus_resume(struct device
*dev
)
138 struct mmc_driver
*drv
= to_mmc_driver(dev
->driver
);
139 struct mmc_card
*card
= mmc_dev_to_card(dev
);
142 if (dev
->driver
&& drv
->resume
)
143 ret
= drv
->resume(card
);
147 #ifdef CONFIG_PM_RUNTIME
149 static int mmc_runtime_suspend(struct device
*dev
)
151 struct mmc_card
*card
= mmc_dev_to_card(dev
);
153 return mmc_power_save_host(card
->host
);
156 static int mmc_runtime_resume(struct device
*dev
)
158 struct mmc_card
*card
= mmc_dev_to_card(dev
);
160 return mmc_power_restore_host(card
->host
);
163 static int mmc_runtime_idle(struct device
*dev
)
165 return pm_runtime_suspend(dev
);
168 static const struct dev_pm_ops mmc_bus_pm_ops
= {
169 .runtime_suspend
= mmc_runtime_suspend
,
170 .runtime_resume
= mmc_runtime_resume
,
171 .runtime_idle
= mmc_runtime_idle
,
174 #define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
176 #else /* !CONFIG_PM_RUNTIME */
178 #define MMC_PM_OPS_PTR NULL
180 #endif /* !CONFIG_PM_RUNTIME */
182 static struct bus_type mmc_bus_type
= {
184 .dev_attrs
= mmc_dev_attrs
,
185 .match
= mmc_bus_match
,
186 .uevent
= mmc_bus_uevent
,
187 .probe
= mmc_bus_probe
,
188 .remove
= mmc_bus_remove
,
189 .suspend
= mmc_bus_suspend
,
190 .resume
= mmc_bus_resume
,
191 .pm
= MMC_PM_OPS_PTR
,
194 int mmc_register_bus(void)
196 return bus_register(&mmc_bus_type
);
199 void mmc_unregister_bus(void)
201 bus_unregister(&mmc_bus_type
);
205 * mmc_register_driver - register a media driver
206 * @drv: MMC media driver
208 int mmc_register_driver(struct mmc_driver
*drv
)
210 drv
->drv
.bus
= &mmc_bus_type
;
211 return driver_register(&drv
->drv
);
214 EXPORT_SYMBOL(mmc_register_driver
);
217 * mmc_unregister_driver - unregister a media driver
218 * @drv: MMC media driver
220 void mmc_unregister_driver(struct mmc_driver
*drv
)
222 drv
->drv
.bus
= &mmc_bus_type
;
223 driver_unregister(&drv
->drv
);
226 EXPORT_SYMBOL(mmc_unregister_driver
);
228 static void mmc_release_card(struct device
*dev
)
230 struct mmc_card
*card
= mmc_dev_to_card(dev
);
232 sdio_free_common_cis(card
);
241 * Allocate and initialise a new MMC card structure.
243 struct mmc_card
*mmc_alloc_card(struct mmc_host
*host
, struct device_type
*type
)
245 struct mmc_card
*card
;
247 card
= kzalloc(sizeof(struct mmc_card
), GFP_KERNEL
);
249 return ERR_PTR(-ENOMEM
);
253 device_initialize(&card
->dev
);
255 card
->dev
.parent
= mmc_classdev(host
);
256 card
->dev
.bus
= &mmc_bus_type
;
257 card
->dev
.release
= mmc_release_card
;
258 card
->dev
.type
= type
;
264 * Register a new MMC card with the driver model.
266 int mmc_add_card(struct mmc_card
*card
)
271 dev_set_name(&card
->dev
, "%s:%04x", mmc_hostname(card
->host
), card
->rca
);
273 switch (card
->type
) {
279 if (mmc_card_blockaddr(card
)) {
280 if (mmc_card_ext_capacity(card
))
289 case MMC_TYPE_SD_COMBO
:
291 if (mmc_card_blockaddr(card
))
299 if (mmc_host_is_spi(card
->host
)) {
300 printk(KERN_INFO
"%s: new %s%s%s card on SPI\n",
301 mmc_hostname(card
->host
),
302 mmc_card_highspeed(card
) ? "high speed " : "",
303 mmc_card_ddr_mode(card
) ? "DDR " : "",
306 printk(KERN_INFO
"%s: new %s%s%s card at address %04x\n",
307 mmc_hostname(card
->host
),
308 mmc_sd_card_uhs(card
) ? "ultra high speed " :
309 (mmc_card_highspeed(card
) ? "high speed " : ""),
310 mmc_card_ddr_mode(card
) ? "DDR " : "",
314 #ifdef CONFIG_DEBUG_FS
315 mmc_add_card_debugfs(card
);
318 ret
= device_add(&card
->dev
);
322 mmc_card_set_present(card
);
328 * Unregister a new MMC card with the driver model, and
329 * (eventually) free it.
331 void mmc_remove_card(struct mmc_card
*card
)
333 #ifdef CONFIG_DEBUG_FS
334 mmc_remove_card_debugfs(card
);
337 if (mmc_card_present(card
)) {
338 if (mmc_host_is_spi(card
->host
)) {
339 printk(KERN_INFO
"%s: SPI card removed\n",
340 mmc_hostname(card
->host
));
342 printk(KERN_INFO
"%s: card %04x removed\n",
343 mmc_hostname(card
->host
), card
->rca
);
345 device_del(&card
->dev
);
348 put_device(&card
->dev
);