f83c3838b9
This patch moves the char and block major number definitions to major.h to be with the rest of the major numbers. While doing this, include major.h in the files that need it. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/*
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* Simple read-only (writable only for RAM) mtdblock driver
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*
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* Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/blktrans.h>
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#include <linux/module.h>
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#include <linux/major.h>
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static int mtdblock_readsect(struct mtd_blktrans_dev *dev,
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unsigned long block, char *buf)
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{
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size_t retlen;
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if (mtd_read(dev->mtd, (block * 512), 512, &retlen, buf))
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return 1;
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return 0;
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}
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static int mtdblock_writesect(struct mtd_blktrans_dev *dev,
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unsigned long block, char *buf)
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{
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size_t retlen;
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if (mtd_write(dev->mtd, (block * 512), 512, &retlen, buf))
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return 1;
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return 0;
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}
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static void mtdblock_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
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{
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struct mtd_blktrans_dev *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return;
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dev->mtd = mtd;
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dev->devnum = mtd->index;
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dev->size = mtd->size >> 9;
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dev->tr = tr;
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dev->readonly = 1;
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if (add_mtd_blktrans_dev(dev))
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kfree(dev);
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}
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static void mtdblock_remove_dev(struct mtd_blktrans_dev *dev)
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{
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del_mtd_blktrans_dev(dev);
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}
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static struct mtd_blktrans_ops mtdblock_tr = {
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.name = "mtdblock",
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.major = MTD_BLOCK_MAJOR,
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.part_bits = 0,
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.blksize = 512,
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.readsect = mtdblock_readsect,
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.writesect = mtdblock_writesect,
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.add_mtd = mtdblock_add_mtd,
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.remove_dev = mtdblock_remove_dev,
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.owner = THIS_MODULE,
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};
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static int __init mtdblock_init(void)
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{
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return register_mtd_blktrans(&mtdblock_tr);
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}
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static void __exit mtdblock_exit(void)
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{
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deregister_mtd_blktrans(&mtdblock_tr);
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}
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module_init(mtdblock_init);
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module_exit(mtdblock_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_DESCRIPTION("Simple read-only block device emulation access to MTD devices");
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