1 files changed, 238 insertions, 0 deletions

diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c
new file mode 100644
index 000000000000..29a56e9cd5b3
--- /dev/null
+++ b/drivers/mmc/mmc_sysfs.c
@@ -0,0 +1,238 @@
+/*
+ *  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, 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);