* linux/drivers/mmc/core/sysfs.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright 2007 Pierre Ossman
*
* 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
*
* MMC sysfs/driver model support.
*/
-#include <linux/module.h>
-#include <linux/init.h>
#include <linux/device.h>
-#include <linux/idr.h>
-#include <linux/workqueue.h>
#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
#include "sysfs.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 cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
-
-#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(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
-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 struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
-
-
-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.
- */
-static int mmc_bus_match(struct device *dev, struct device_driver *drv)
-{
- return 1;
-}
-
-static int
-mmc_bus_uevent(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 retval = 0, i = 0, length = 0;
-
-#define add_env(fmt,val) do { \
- retval = add_uevent_var(envp, num_envp, &i, \
- buf, buf_size, &length, \
- fmt, val); \
- if (retval) \
- return retval; \
-} while (0);
-
- for (i = 0; i < 12; i++)
- ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
- ccc[12] = '\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);
-#undef add_env
- envp[i] = NULL;
-
- 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 int mmc_bus_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_bus_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;
-}
-
-static struct bus_type mmc_bus_type = {
- .name = "mmc",
- .dev_attrs = mmc_dev_attrs,
- .match = mmc_bus_match,
- .uevent = mmc_bus_uevent,
- .probe = mmc_bus_probe,
- .remove = mmc_bus_remove,
- .suspend = mmc_bus_suspend,
- .resume = mmc_bus_resume,
-};
-
-/**
- * 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;
- 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 = mmc_classdev(host);
- 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)
+int mmc_add_attrs(struct mmc_card *card, struct device_attribute *attrs)
{
- int ret;
+ int error = 0;
+ int i;
- snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
- "%s:%04x", mmc_hostname(card->host), card->rca);
-
- ret = device_add(&card->dev);
- if (ret == 0) {
- if (mmc_card_sd(card)) {
- ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
- if (ret)
- device_del(&card->dev);
+ for (i = 0; attr_name(attrs[i]); i++) {
+ error = device_create_file(&card->dev, &attrs[i]);
+ if (error) {
+ while (--i >= 0)
+ device_remove_file(&card->dev, &attrs[i]);
+ break;
}
}
- if (ret == 0)
- mmc_card_set_present(card);
- return ret;
-}
-
-/*
- * 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)) {
- if (mmc_card_sd(card))
- device_remove_file(&card->dev, &mmc_dev_attr_scr);
-
- device_del(&card->dev);
- }
-
- put_device(&card->dev);
-}
-
-
-static void mmc_host_classdev_release(struct device *dev)
-{
- struct mmc_host *host = cls_dev_to_mmc_host(dev);
- kfree(host);
-}
-
-static struct class mmc_host_class = {
- .name = "mmc_host",
- .dev_release = mmc_host_classdev_release,
-};
-
-static DEFINE_IDR(mmc_host_idr);
-static DEFINE_SPINLOCK(mmc_host_lock);
-
-/*
- * Internal function. Allocate a new MMC host.
- */
-struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
-{
- struct mmc_host *host;
-
- host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
- if (host) {
- memset(host, 0, sizeof(struct mmc_host) + extra);
-
- host->parent = dev;
- host->class_dev.parent = dev;
- host->class_dev.class = &mmc_host_class;
- device_initialize(&host->class_dev);
- }
- return host;
+ return error;
}
-/*
- * Internal function. Register a new MMC host with the MMC class.
- */
-int mmc_add_host_sysfs(struct mmc_host *host)
+void mmc_remove_attrs(struct mmc_card *card, struct device_attribute *attrs)
{
- int err;
-
- if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
- return -ENOMEM;
-
- spin_lock(&mmc_host_lock);
- err = idr_get_new(&mmc_host_idr, host, &host->index);
- spin_unlock(&mmc_host_lock);
- if (err)
- return err;
-
- snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
- "mmc%d", host->index);
-
- return device_add(&host->class_dev);
-}
+ int i;
-/*
- * Internal function. Unregister a MMC host with the MMC class.
- */
-void mmc_remove_host_sysfs(struct mmc_host *host)
-{
- device_del(&host->class_dev);
-
- spin_lock(&mmc_host_lock);
- idr_remove(&mmc_host_idr, host->index);
- spin_unlock(&mmc_host_lock);
-}
-
-/*
- * Internal function. Free a MMC host.
- */
-void mmc_free_host_sysfs(struct mmc_host *host)
-{
- put_device(&host->class_dev);
-}
-
-static struct workqueue_struct *workqueue;
-
-/*
- * Internal function. Schedule delayed work in the MMC work queue.
- */
-int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
-{
- return queue_delayed_work(workqueue, work, delay);
-}
-
-/*
- * Internal function. Flush all scheduled work from the MMC work queue.
- */
-void mmc_flush_scheduled_work(void)
-{
- flush_workqueue(workqueue);
-}
-
-static int __init mmc_init(void)
-{
- int ret;
-
- workqueue = create_singlethread_workqueue("kmmcd");
- if (!workqueue)
- return -ENOMEM;
-
- ret = bus_register(&mmc_bus_type);
- if (ret == 0) {
- ret = class_register(&mmc_host_class);
- if (ret)
- bus_unregister(&mmc_bus_type);
- }
- return ret;
-}
-
-static void __exit mmc_exit(void)
-{
- class_unregister(&mmc_host_class);
- bus_unregister(&mmc_bus_type);
- destroy_workqueue(workqueue);
+ for (i = 0; attr_name(attrs[i]); i++)
+ device_remove_file(&card->dev, &attrs[i]);
}
-module_init(mmc_init);
-module_exit(mmc_exit);
git.samba.org / sfrench / cifs-2.6.git / blobdiff