*/
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)
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) {
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);
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);
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);
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);
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);
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);
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);
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);
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);
MTD_DEVT(i) + 1,
NULL, "mtd%dro", i);
- DEBUG(0, "mtd: Giving out device %d to %s\n", i, mtd->name);
+ pr_debug("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_entry(not, &mtd_notifiers, list)
}
/**
- * mtd_device_register - register an MTD device.
+ * mtd_device_parse_register - parse partitions and register an MTD device.
*
- * @master: the MTD device to register
- * @parts: the partitions to register - only valid if nr_parts > 0
- * @nr_parts: the number of partitions in parts. If zero then the full MTD
- * device is registered
+ * @mtd: the MTD device to register
+ * @types: the list of MTD partition probes to try, see
+ * 'parse_mtd_partitions()' for more information
+ * @parser_data: MTD partition parser-specific data
+ * @parts: fallback partition information to register, if parsing fails;
+ * only valid if %nr_parts > %0
+ * @nr_parts: the number of partitions in parts, if zero then the full
+ * MTD device is registered if no partition info is found
*
- * Register an MTD device with the system and optionally, a number of
- * partitions. If nr_parts is 0 then the whole device is registered, otherwise
- * only the partitions are registered. To register both the full device *and*
- * the partitions, call mtd_device_register() twice, once with nr_parts == 0
- * and once equal to the number of partitions.
+ * This function aggregates MTD partitions parsing (done by
+ * 'parse_mtd_partitions()') and MTD device and partitions registering. It
+ * basically follows the most common pattern found in many MTD drivers:
+ *
+ * * It first tries to probe partitions on MTD device @mtd using parsers
+ * specified in @types (if @types is %NULL, then the default list of parsers
+ * is used, see 'parse_mtd_partitions()' for more information). If none are
+ * found this functions tries to fallback to information specified in
+ * @parts/@nr_parts.
+ * * If any partitioning info was found, this function registers the found
+ * partitions.
+ * * If no partitions were found this function just registers the MTD device
+ * @mtd and exits.
+ *
+ * Returns zero in case of success and a negative error code in case of failure.
*/
-int mtd_device_register(struct mtd_info *master,
- const struct mtd_partition *parts,
- int nr_parts)
+int mtd_device_parse_register(struct mtd_info *mtd, const char **types,
+ struct mtd_part_parser_data *parser_data,
+ const struct mtd_partition *parts,
+ int nr_parts)
{
- return parts ? add_mtd_partitions(master, parts, nr_parts) :
- add_mtd_device(master);
+ int err;
+ struct mtd_partition *real_parts;
+
+ err = parse_mtd_partitions(mtd, types, &real_parts, parser_data);
+ if (err <= 0 && nr_parts && parts) {
+ real_parts = kmemdup(parts, sizeof(*parts) * nr_parts,
+ GFP_KERNEL);
+ if (!real_parts)
+ err = -ENOMEM;
+ else
+ err = nr_parts;
+ }
+
+ if (err > 0) {
+ err = add_mtd_partitions(mtd, real_parts, err);
+ kfree(real_parts);
+ } else if (err == 0) {
+ err = add_mtd_device(mtd);
+ if (err == 1)
+ err = -ENODEV;
+ }
+
+ return err;
}
-EXPORT_SYMBOL_GPL(mtd_device_register);
+EXPORT_SYMBOL_GPL(mtd_device_parse_register);
/**
* mtd_device_unregister - unregister an existing MTD device.
* 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;
mutex_unlock(&mtd_table_mutex);
}
+EXPORT_SYMBOL_GPL(register_mtd_user);
/**
* unregister_mtd_user - unregister a 'user' of MTD devices.
* '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;
mutex_unlock(&mtd_table_mutex);
return 0;
}
-
+EXPORT_SYMBOL_GPL(unregister_mtd_user);
/**
* get_mtd_device - obtain a validated handle for an MTD device
* 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;
mutex_unlock(&mtd_table_mutex);
return ret;
}
+EXPORT_SYMBOL_GPL(get_mtd_device);
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
* 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;
mutex_unlock(&mtd_table_mutex);
return ERR_PTR(err);
}
+EXPORT_SYMBOL_GPL(get_mtd_device_nm);
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)
{
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
*/
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
projects / ~andy / linux / blobdiff