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path: root/drivers/mtd/mtdcore.c
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Diffstat (limited to 'drivers/mtd/mtdcore.c')
-rw-r--r--drivers/mtd/mtdcore.c126
1 files changed, 71 insertions, 55 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index b01993ea260..6ae9ca01388 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -107,7 +107,8 @@ static LIST_HEAD(mtd_notifiers);
*/
static void mtd_release(struct device *dev)
{
- dev_t index = MTD_DEVT(dev_to_mtd(dev)->index);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+ dev_t index = MTD_DEVT(mtd->index);
/* remove /dev/mtdXro node if needed */
if (index)
@@ -116,27 +117,24 @@ static void mtd_release(struct device *dev)
static int mtd_cls_suspend(struct device *dev, pm_message_t state)
{
- struct mtd_info *mtd = dev_to_mtd(dev);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
- if (mtd && mtd->suspend)
- return mtd->suspend(mtd);
- else
- return 0;
+ return mtd_suspend(mtd);
}
static int mtd_cls_resume(struct device *dev)
{
- struct mtd_info *mtd = dev_to_mtd(dev);
-
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+
if (mtd && mtd->resume)
- mtd->resume(mtd);
+ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
char *type;
switch (mtd->type) {
@@ -172,7 +170,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "0x%lx\n", (unsigned long)mtd->flags);
@@ -182,7 +180,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%llu\n",
(unsigned long long)mtd->size);
@@ -193,7 +191,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->erasesize);
@@ -203,7 +201,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->writesize);
@@ -213,7 +211,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
unsigned int subpagesize = mtd->writesize >> mtd->subpage_sft;
return snprintf(buf, PAGE_SIZE, "%u\n", subpagesize);
@@ -224,7 +222,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->oobsize);
@@ -234,7 +232,7 @@ 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);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%u\n", mtd->numeraseregions);
@@ -245,7 +243,7 @@ static DEVICE_ATTR(numeraseregions, S_IRUGO, mtd_numeraseregions_show,
static ssize_t mtd_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct mtd_info *mtd = dev_to_mtd(dev);
+ struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%s\n", mtd->name);
@@ -338,9 +336,9 @@ int add_mtd_device(struct mtd_info *mtd)
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_POWERUP_LOCK) && mtd->unlock) {
- if (mtd->unlock(mtd, 0, mtd->size))
+ if ((mtd->flags & MTD_WRITEABLE) && (mtd->flags & MTD_POWERUP_LOCK)) {
+ error = mtd_unlock(mtd, 0, mtd->size);
+ if (error && error != -EOPNOTSUPP)
printk(KERN_WARNING
"%s: unlock failed, writes may not work\n",
mtd->name);
@@ -516,7 +514,6 @@ EXPORT_SYMBOL_GPL(mtd_device_unregister);
* or removal of MTD devices. Causes the 'add' callback to be immediately
* invoked for each MTD device currently present in the system.
*/
-
void register_mtd_user (struct mtd_notifier *new)
{
struct mtd_info *mtd;
@@ -532,6 +529,7 @@ void register_mtd_user (struct mtd_notifier *new)
mutex_unlock(&mtd_table_mutex);
}
+EXPORT_SYMBOL_GPL(register_mtd_user);
/**
* unregister_mtd_user - unregister a 'user' of MTD devices.
@@ -542,7 +540,6 @@ void register_mtd_user (struct mtd_notifier *new)
* 'remove' callback to be immediately invoked for each MTD device
* currently present in the system.
*/
-
int unregister_mtd_user (struct mtd_notifier *old)
{
struct mtd_info *mtd;
@@ -558,7 +555,7 @@ int unregister_mtd_user (struct mtd_notifier *old)
mutex_unlock(&mtd_table_mutex);
return 0;
}
-
+EXPORT_SYMBOL_GPL(unregister_mtd_user);
/**
* get_mtd_device - obtain a validated handle for an MTD device
@@ -571,7 +568,6 @@ int unregister_mtd_user (struct mtd_notifier *old)
* both, return the num'th driver only if its address matches. Return
* error code if not.
*/
-
struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num)
{
struct mtd_info *ret = NULL, *other;
@@ -604,6 +600,7 @@ out:
mutex_unlock(&mtd_table_mutex);
return ret;
}
+EXPORT_SYMBOL_GPL(get_mtd_device);
int __get_mtd_device(struct mtd_info *mtd)
@@ -624,6 +621,7 @@ int __get_mtd_device(struct mtd_info *mtd)
mtd->usecount++;
return 0;
}
+EXPORT_SYMBOL_GPL(__get_mtd_device);
/**
* get_mtd_device_nm - obtain a validated handle for an MTD device by
@@ -633,7 +631,6 @@ int __get_mtd_device(struct mtd_info *mtd)
* This function returns MTD device description structure in case of
* success and an error code in case of failure.
*/
-
struct mtd_info *get_mtd_device_nm(const char *name)
{
int err = -ENODEV;
@@ -662,6 +659,7 @@ out_unlock:
mutex_unlock(&mtd_table_mutex);
return ERR_PTR(err);
}
+EXPORT_SYMBOL_GPL(get_mtd_device_nm);
void put_mtd_device(struct mtd_info *mtd)
{
@@ -670,6 +668,7 @@ void put_mtd_device(struct mtd_info *mtd)
mutex_unlock(&mtd_table_mutex);
}
+EXPORT_SYMBOL_GPL(put_mtd_device);
void __put_mtd_device(struct mtd_info *mtd)
{
@@ -681,39 +680,65 @@ void __put_mtd_device(struct mtd_info *mtd)
module_put(mtd->owner);
}
+EXPORT_SYMBOL_GPL(__put_mtd_device);
-/* default_mtd_writev - default mtd writev method for MTD devices that
- * don't implement their own
+/*
+ * default_mtd_writev - the default writev method
+ * @mtd: mtd device description object pointer
+ * @vecs: the vectors to write
+ * @count: count of vectors in @vecs
+ * @to: the MTD device offset to write to
+ * @retlen: on exit contains the count of bytes written to the MTD device.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
*/
-
-int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t *retlen)
+static int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen)
{
unsigned long i;
size_t totlen = 0, thislen;
int ret = 0;
- if(!mtd->write) {
- ret = -EROFS;
- } else {
- for (i=0; i<count; i++) {
- if (!vecs[i].iov_len)
- continue;
- ret = mtd->write(mtd, to, vecs[i].iov_len, &thislen, vecs[i].iov_base);
- totlen += thislen;
- if (ret || thislen != vecs[i].iov_len)
- break;
- to += vecs[i].iov_len;
- }
+ for (i = 0; i < count; i++) {
+ if (!vecs[i].iov_len)
+ continue;
+ ret = mtd_write(mtd, to, vecs[i].iov_len, &thislen,
+ vecs[i].iov_base);
+ totlen += thislen;
+ if (ret || thislen != vecs[i].iov_len)
+ break;
+ to += vecs[i].iov_len;
}
- if (retlen)
- *retlen = totlen;
+ *retlen = totlen;
return ret;
}
+/*
+ * mtd_writev - the vector-based MTD write method
+ * @mtd: mtd device description object pointer
+ * @vecs: the vectors to write
+ * @count: count of vectors in @vecs
+ * @to: the MTD device offset to write to
+ * @retlen: on exit contains the count of bytes written to the MTD device.
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
+ unsigned long count, loff_t to, size_t *retlen)
+{
+ *retlen = 0;
+ if (!mtd->writev)
+ return default_mtd_writev(mtd, vecs, count, to, retlen);
+ return mtd->writev(mtd, vecs, count, to, retlen);
+}
+EXPORT_SYMBOL_GPL(mtd_writev);
+
/**
* mtd_kmalloc_up_to - allocate a contiguous buffer up to the specified size
- * @size: A pointer to the ideal or maximum size of the allocation. Points
+ * @mtd: mtd device description object pointer
+ * @size: a pointer to the ideal or maximum size of the allocation, points
* to the actual allocation size on success.
*
* This routine attempts to allocate a contiguous kernel buffer up to
@@ -758,15 +783,6 @@ void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size)
*/
return kmalloc(*size, GFP_KERNEL);
}
-
-EXPORT_SYMBOL_GPL(get_mtd_device);
-EXPORT_SYMBOL_GPL(get_mtd_device_nm);
-EXPORT_SYMBOL_GPL(__get_mtd_device);
-EXPORT_SYMBOL_GPL(put_mtd_device);
-EXPORT_SYMBOL_GPL(__put_mtd_device);
-EXPORT_SYMBOL_GPL(register_mtd_user);
-EXPORT_SYMBOL_GPL(unregister_mtd_user);
-EXPORT_SYMBOL_GPL(default_mtd_writev);
EXPORT_SYMBOL_GPL(mtd_kmalloc_up_to);
#ifdef CONFIG_PROC_FS