59018b6d2a
Once upon a time, the MTD repository was using CVS. This patch therefore removes all usages of the no longer updated CVS keywords from the MTD code. This also includes code that printed them to the user. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* Common code to handle absent "placeholder" devices
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* Copyright 2001 Resilience Corporation <ebrower@resilience.com>
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*
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* This map driver is used to allocate "placeholder" MTD
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* devices on systems that have socketed/removable media.
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* Use of this driver as a fallback preserves the expected
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* registration of MTD device nodes regardless of probe outcome.
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* A usage example is as follows:
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*
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* my_dev[i] = do_map_probe("cfi", &my_map[i]);
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* if(NULL == my_dev[i]) {
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* my_dev[i] = do_map_probe("map_absent", &my_map[i]);
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* }
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*
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* Any device 'probed' with this driver will return -ENODEV
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* upon open.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/compatmac.h>
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static int map_absent_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
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static int map_absent_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
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static int map_absent_erase (struct mtd_info *, struct erase_info *);
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static void map_absent_sync (struct mtd_info *);
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static struct mtd_info *map_absent_probe(struct map_info *map);
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static void map_absent_destroy (struct mtd_info *);
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static struct mtd_chip_driver map_absent_chipdrv = {
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.probe = map_absent_probe,
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.destroy = map_absent_destroy,
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.name = "map_absent",
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.module = THIS_MODULE
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};
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static struct mtd_info *map_absent_probe(struct map_info *map)
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{
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struct mtd_info *mtd;
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mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
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if (!mtd) {
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return NULL;
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}
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map->fldrv = &map_absent_chipdrv;
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mtd->priv = map;
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mtd->name = map->name;
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mtd->type = MTD_ABSENT;
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mtd->size = map->size;
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mtd->erase = map_absent_erase;
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mtd->read = map_absent_read;
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mtd->write = map_absent_write;
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mtd->sync = map_absent_sync;
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mtd->flags = 0;
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mtd->erasesize = PAGE_SIZE;
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mtd->writesize = 1;
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__module_get(THIS_MODULE);
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return mtd;
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}
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static int map_absent_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
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{
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*retlen = 0;
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return -ENODEV;
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}
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static int map_absent_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
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{
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*retlen = 0;
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return -ENODEV;
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}
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static int map_absent_erase(struct mtd_info *mtd, struct erase_info *instr)
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{
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return -ENODEV;
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}
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static void map_absent_sync(struct mtd_info *mtd)
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{
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/* nop */
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}
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static void map_absent_destroy(struct mtd_info *mtd)
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{
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/* nop */
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}
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static int __init map_absent_init(void)
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{
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register_mtd_chip_driver(&map_absent_chipdrv);
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return 0;
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}
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static void __exit map_absent_exit(void)
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{
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unregister_mtd_chip_driver(&map_absent_chipdrv);
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}
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module_init(map_absent_init);
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module_exit(map_absent_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Resilience Corporation - Eric Brower <ebrower@resilience.com>");
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MODULE_DESCRIPTION("Placeholder MTD chip driver for 'absent' chips");
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