diff options
Diffstat (limited to 'drivers/mtd/mtdcore.c')
| -rw-r--r-- | drivers/mtd/mtdcore.c | 126 |
1 files changed, 71 insertions, 55 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index b01993ea260e..6ae9ca01388b 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 |