/*
- * $Id: mtdcore.c,v 1.47 2005/11/07 11:14:20 gleixner Exp $
- *
* Core registration and callback routines for MTD
* drivers and users.
*
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/mtd/mtd.h>
+#include "internal.h"
+
+#include "mtdcore.h"
+
+static int mtd_cls_suspend(struct device *dev, pm_message_t state);
+static int mtd_cls_resume(struct device *dev);
+
+static struct class mtd_class = {
+ .name = "mtd",
+ .owner = THIS_MODULE,
+ .suspend = mtd_cls_suspend,
+ .resume = mtd_cls_resume,
+};
/* These are exported solely for the purpose of mtd_blkdevs.c. You
should not use them for _anything_ else */
static LIST_HEAD(mtd_notifiers);
+
+#if defined(CONFIG_MTD_CHAR) || defined(CONFIG_MTD_CHAR_MODULE)
+#define MTD_DEVT(index) MKDEV(MTD_CHAR_MAJOR, (index)*2)
+#else
+#define MTD_DEVT(index) 0
+#endif
+
+/* REVISIT once MTD uses the driver model better, whoever allocates
+ * the mtd_info will probably want to use the release() hook...
+ */
+static void mtd_release(struct device *dev)
+{
+ dev_t index = MTD_DEVT(dev_to_mtd(dev)->index);
+
+ /* remove /dev/mtdXro node if needed */
+ if (index)
+ device_destroy(&mtd_class, index + 1);
+}
+
+static int mtd_cls_suspend(struct device *dev, pm_message_t state)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ if (mtd && mtd->suspend)
+ return mtd->suspend(mtd);
+ else
+ return 0;
+}
+
+static int mtd_cls_resume(struct device *dev)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ if (mtd && mtd->resume)
+ mtd->resume(mtd);
+ return 0;
+}
+
+static ssize_t mtd_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+ char *type;
+
+ switch (mtd->type) {
+ case MTD_ABSENT:
+ type = "absent";
+ break;
+ case MTD_RAM:
+ type = "ram";
+ break;
+ case MTD_ROM:
+ type = "rom";
+ break;
+ case MTD_NORFLASH:
+ type = "nor";
+ break;
+ case MTD_NANDFLASH:
+ type = "nand";
+ break;
+ case MTD_DATAFLASH:
+ type = "dataflash";
+ break;
+ case MTD_UBIVOLUME:
+ type = "ubi";
+ break;
+ default:
+ type = "unknown";
+ }
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", type);
+}
+static DEVICE_ATTR(type, S_IRUGO, mtd_type_show, NULL);
+
+static ssize_t mtd_flags_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "0x%lx\n", (unsigned long)mtd->flags);
+
+}
+static DEVICE_ATTR(flags, S_IRUGO, mtd_flags_show, NULL);
+
+static ssize_t mtd_size_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%llu\n",
+ (unsigned long long)mtd->size);
+
+}
+static DEVICE_ATTR(size, S_IRUGO, mtd_size_show, NULL);
+
+static ssize_t mtd_erasesize_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->erasesize);
+
+}
+static DEVICE_ATTR(erasesize, S_IRUGO, mtd_erasesize_show, NULL);
+
+static ssize_t mtd_writesize_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->writesize);
+
+}
+static DEVICE_ATTR(writesize, S_IRUGO, mtd_writesize_show, NULL);
+
+static ssize_t mtd_subpagesize_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+ unsigned int subpagesize = mtd->writesize >> mtd->subpage_sft;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", subpagesize);
+
+}
+static DEVICE_ATTR(subpagesize, S_IRUGO, mtd_subpagesize_show, NULL);
+
+static ssize_t mtd_oobsize_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->oobsize);
+
+}
+static DEVICE_ATTR(oobsize, S_IRUGO, mtd_oobsize_show, NULL);
+
+static ssize_t mtd_numeraseregions_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", mtd->numeraseregions);
+
+}
+static DEVICE_ATTR(numeraseregions, S_IRUGO, mtd_numeraseregions_show,
+ NULL);
+
+static ssize_t mtd_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", mtd->name);
+
+}
+static DEVICE_ATTR(name, S_IRUGO, mtd_name_show, NULL);
+
+static struct attribute *mtd_attrs[] = {
+ &dev_attr_type.attr,
+ &dev_attr_flags.attr,
+ &dev_attr_size.attr,
+ &dev_attr_erasesize.attr,
+ &dev_attr_writesize.attr,
+ &dev_attr_subpagesize.attr,
+ &dev_attr_oobsize.attr,
+ &dev_attr_numeraseregions.attr,
+ &dev_attr_name.attr,
+ NULL,
+};
+
+static struct attribute_group mtd_group = {
+ .attrs = mtd_attrs,
+};
+
+static const struct attribute_group *mtd_groups[] = {
+ &mtd_group,
+ NULL,
+};
+
+static struct device_type mtd_devtype = {
+ .name = "mtd",
+ .groups = mtd_groups,
+ .release = mtd_release,
+};
+
/**
* add_mtd_device - register an MTD device
* @mtd: pointer to new MTD device info structure
* notify each currently active MTD 'user' of its arrival. Returns
* zero on success or 1 on failure, which currently will only happen
* if the number of present devices exceeds MAX_MTD_DEVICES (i.e. 16)
+ * or there's a sysfs error.
*/
int add_mtd_device(struct mtd_info *mtd)
{
int i;
+ if (!mtd->backing_dev_info) {
+ switch (mtd->type) {
+ case MTD_RAM:
+ mtd->backing_dev_info = &mtd_bdi_rw_mappable;
+ break;
+ case MTD_ROM:
+ mtd->backing_dev_info = &mtd_bdi_ro_mappable;
+ break;
+ default:
+ mtd->backing_dev_info = &mtd_bdi_unmappable;
+ break;
+ }
+ }
+
BUG_ON(mtd->writesize == 0);
mutex_lock(&mtd_table_mutex);
for (i=0; i < MAX_MTD_DEVICES; i++)
if (!mtd_table[i]) {
- struct list_head *this;
+ struct mtd_notifier *not;
mtd_table[i] = mtd;
mtd->index = i;
mtd->usecount = 0;
+ if (is_power_of_2(mtd->erasesize))
+ mtd->erasesize_shift = ffs(mtd->erasesize) - 1;
+ else
+ mtd->erasesize_shift = 0;
+
+ if (is_power_of_2(mtd->writesize))
+ mtd->writesize_shift = ffs(mtd->writesize) - 1;
+ else
+ mtd->writesize_shift = 0;
+
+ mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1;
+ mtd->writesize_mask = (1 << mtd->writesize_shift) - 1;
+
/* Some chips always power up locked. Unlock them now */
if ((mtd->flags & MTD_WRITEABLE)
- && (mtd->flags & MTD_STUPID_LOCK) && mtd->unlock) {
+ && (mtd->flags & MTD_POWERUP_LOCK) && mtd->unlock) {
if (mtd->unlock(mtd, 0, mtd->size))
printk(KERN_WARNING
"%s: unlock failed, "
mtd->name);
}
+ /* Caller should have set dev.parent to match the
+ * physical device.
+ */
+ mtd->dev.type = &mtd_devtype;
+ mtd->dev.class = &mtd_class;
+ mtd->dev.devt = MTD_DEVT(i);
+ dev_set_name(&mtd->dev, "mtd%d", i);
+ dev_set_drvdata(&mtd->dev, mtd);
+ if (device_register(&mtd->dev) != 0) {
+ mtd_table[i] = NULL;
+ break;
+ }
+
+ if (MTD_DEVT(i))
+ device_create(&mtd_class, mtd->dev.parent,
+ MTD_DEVT(i) + 1,
+ NULL, "mtd%dro", i);
+
DEBUG(0, "mtd: Giving out device %d to %s\n",i, mtd->name);
/* No need to get a refcount on the module containing
the notifier, since we hold the mtd_table_mutex */
- list_for_each(this, &mtd_notifiers) {
- struct mtd_notifier *not = list_entry(this, struct mtd_notifier, list);
+ list_for_each_entry(not, &mtd_notifiers, list)
not->add(mtd);
- }
mutex_unlock(&mtd_table_mutex);
/* We _know_ we aren't being removed, because
mtd->index, mtd->name, mtd->usecount);
ret = -EBUSY;
} else {
- struct list_head *this;
+ struct mtd_notifier *not;
+
+ device_unregister(&mtd->dev);
/* No need to get a refcount on the module containing
the notifier, since we hold the mtd_table_mutex */
- list_for_each(this, &mtd_notifiers) {
- struct mtd_notifier *not = list_entry(this, struct mtd_notifier, list);
+ list_for_each_entry(not, &mtd_notifiers, list)
not->remove(mtd);
- }
mtd_table[mtd->index] = NULL;
}
/* default_mtd_writev - default mtd writev method for MTD devices that
- * dont implement their own
+ * don't implement their own
*/
int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
return ret;
}
-EXPORT_SYMBOL(add_mtd_device);
-EXPORT_SYMBOL(del_mtd_device);
-EXPORT_SYMBOL(get_mtd_device);
-EXPORT_SYMBOL(get_mtd_device_nm);
-EXPORT_SYMBOL(put_mtd_device);
-EXPORT_SYMBOL(register_mtd_user);
-EXPORT_SYMBOL(unregister_mtd_user);
-EXPORT_SYMBOL(default_mtd_writev);
+EXPORT_SYMBOL_GPL(add_mtd_device);
+EXPORT_SYMBOL_GPL(del_mtd_device);
+EXPORT_SYMBOL_GPL(get_mtd_device);
+EXPORT_SYMBOL_GPL(get_mtd_device_nm);
+EXPORT_SYMBOL_GPL(put_mtd_device);
+EXPORT_SYMBOL_GPL(register_mtd_user);
+EXPORT_SYMBOL_GPL(unregister_mtd_user);
+EXPORT_SYMBOL_GPL(default_mtd_writev);
#ifdef CONFIG_PROC_FS
if (!this)
return 0;
- return sprintf(buf, "mtd%d: %8.8x %8.8x \"%s\"\n", i, this->size,
+ return sprintf(buf, "mtd%d: %8.8llx %8.8x \"%s\"\n", i,
+ (unsigned long long)this->size,
this->erasesize, this->name);
}
return ((count < begin+len-off) ? count : begin+len-off);
}
+#endif /* CONFIG_PROC_FS */
+
/*====================================================================*/
/* Init code */
static int __init init_mtd(void)
{
+ int ret;
+ ret = class_register(&mtd_class);
+
+ if (ret) {
+ pr_err("Error registering mtd class: %d\n", ret);
+ return ret;
+ }
+#ifdef CONFIG_PROC_FS
if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
proc_mtd->read_proc = mtd_read_proc;
+#endif /* CONFIG_PROC_FS */
return 0;
}
static void __exit cleanup_mtd(void)
{
+#ifdef CONFIG_PROC_FS
if (proc_mtd)
remove_proc_entry( "mtd", NULL);
+#endif /* CONFIG_PROC_FS */
+ class_unregister(&mtd_class);
}
module_init(init_mtd);
module_exit(cleanup_mtd);
-#endif /* CONFIG_PROC_FS */
-
-
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("Core MTD registration and access routines");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff