/*
* linux/drivers/mmc/mmc_sysfs.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* MMC sysfs/driver model support.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include "mmc.h"
#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
#define MMC_ATTR(name, fmt, args...) \
static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct mmc_card *card = dev_to_mmc_card(dev); \
return sprintf(buf, fmt, args); \
}
MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
card->raw_cid[2], card->raw_cid[3]);
MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
card->raw_csd[2], card->raw_csd[3]);
MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
MMC_ATTR(name, "%s\n", card->cid.prod_name);
MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
static struct device_attribute mmc_dev_attrs[] = {
MMC_ATTR_RO(cid),
MMC_ATTR_RO(csd),
MMC_ATTR_RO(date),
MMC_ATTR_RO(fwrev),
MMC_ATTR_RO(hwrev),
MMC_ATTR_RO(manfid),
MMC_ATTR_RO(name),
MMC_ATTR_RO(oemid),
MMC_ATTR_RO(serial),
__ATTR_NULL
};
static void mmc_release_card(struct device *dev)
{
struct mmc_card *card = dev_to_mmc_card(dev);
kfree(card);
}
/*
* This currently matches any MMC driver to any MMC card - drivers
* themselves make the decision whether to drive this card in their
* probe method. However, we force "bad" cards to fail.
*/
static int mmc_bus_match(struct device *dev, struct device_driver *drv)
{
struct mmc_card *card = dev_to_mmc_card(dev);
return !mmc_card_bad(card);
}
static int
mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
int buf_size)
{
struct mmc_card *card = dev_to_mmc_card(dev);
char ccc[13];
int i = 0;
#define add_env(fmt,val) \
({ \
int len, ret = -ENOMEM; \
if (i < num_envp) { \
envp[i++] = buf; \
len = snprintf(buf, buf_size, fmt, val) + 1; \
buf_size -= len; \
buf += len; \
if (buf_size >= 0) \
ret = 0; \
} \
ret; \
})
for (i = 0; i < 12; i++)
ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
ccc[12] = '\0';
i = 0;
add_env("MMC_CCC=%s", ccc);
add_env("MMC_MANFID=%06x", card->cid.manfid);
add_env("MMC_NAME=%s", mmc_card_name(card));
add_env("MMC_OEMID=%04x", card->cid.oemid);
return 0;
}
static int mmc_bus_suspend(struct device *dev, pm_message_t state)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
struct mmc_card *card = dev_to_mmc_card(dev);
int ret = 0;
if (dev->driver && drv->suspend)
ret = drv->suspend(card, state);
return ret;
}
static int mmc_bus_resume(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
struct mmc_card *card = dev_to_mmc_card(dev);
int ret = 0;
if (dev->driver && drv->resume)
ret = drv->resume(card);
return ret;
}
static struct bus_type mmc_bus_type = {
.name = "mmc",
.dev_attrs = mmc_dev_attrs,
.match = mmc_bus_match,
.hotplug = mmc_bus_hotplug,
.suspend = mmc_bus_suspend,
.resume = mmc_bus_resume,
};
static int mmc_drv_probe(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
struct mmc_card *card = dev_to_mmc_card(dev);
return drv->probe(card);
}
static int mmc_drv_remove(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
struct mmc_card *card = dev_to_mmc_card(dev);
drv->remove(card);
return 0;
}
/**
* mmc_register_driver - register a media driver
* @drv: MMC media driver
*/
int mmc_register_driver(struct mmc_driver *drv)
{
drv->drv.bus = &mmc_bus_type;
drv->drv.probe = mmc_drv_probe;
drv->drv.remove = mmc_drv_remove;
return driver_register(&drv->drv);
}
EXPORT_SYMBOL(mmc_register_driver);
/**
* mmc_unregister_driver - unregister a media driver
* @drv: MMC media driver
*/
void mmc_unregister_driver(struct mmc_driver *drv)
{
drv->drv.bus = &mmc_bus_type;
driver_unregister(&drv->drv);
}
EXPORT_SYMBOL(mmc_unregister_driver);
/*
* Internal function. Initialise a MMC card structure.
*/
void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
{
memset(card, 0, sizeof(struct mmc_card));
card->host = host;
device_initialize(&card->dev);
card->dev.parent = card->host->dev;
card->dev.bus = &mmc_bus_type;
card->dev.release = mmc_release_card;
}
/*
* Internal function. Register a new MMC card with the driver model.
*/
int mmc_register_card(struct mmc_card *card)
{
snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
"%s:%04x", card->host->host_name, card->rca);
return device_add(&card->dev);
}
/*
* Internal function. Unregister a new MMC card with the
* driver model, and (eventually) free it.
*/
void mmc_remove_card(struct mmc_card *card)
{
if (mmc_card_present(card))
device_del(&card->dev);
put_device(&card->dev);
}
static int __init mmc_init(void)
{
return bus_register(&mmc_bus_type);
}
static void __exit mmc_exit(void)
{
bus_unregister(&mmc_bus_type);
}
module_init(mmc_init);
module_exit(mmc_exit);
