diff options
Diffstat (limited to 'drivers/mtd/chips/map_rom.c')
| -rw-r--r-- | drivers/mtd/chips/map_rom.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c index 821d0ed6bae..47a43cf7e5c 100644 --- a/drivers/mtd/chips/map_rom.c +++ b/drivers/mtd/chips/map_rom.c @@ -13,12 +13,14 @@ #include <linux/init.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> -#include <linux/mtd/compatmac.h> static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *); static void maprom_nop (struct mtd_info *); static struct mtd_info *map_rom_probe(struct map_info *map); +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info); +static unsigned long maprom_unmapped_area(struct mtd_info *, unsigned long, + unsigned long, unsigned long); static struct mtd_chip_driver maprom_chipdrv = { .probe = map_rom_probe, @@ -39,9 +41,11 @@ static struct mtd_info *map_rom_probe(struct map_info *map) mtd->name = map->name; mtd->type = MTD_ROM; mtd->size = map->size; - mtd->read = maprom_read; - mtd->write = maprom_write; - mtd->sync = maprom_nop; + mtd->_get_unmapped_area = maprom_unmapped_area; + mtd->_read = maprom_read; + mtd->_write = maprom_write; + mtd->_sync = maprom_nop; + mtd->_erase = maprom_erase; mtd->flags = MTD_CAP_ROM; mtd->erasesize = map->size; mtd->writesize = 1; @@ -51,6 +55,20 @@ static struct mtd_info *map_rom_probe(struct map_info *map) } +/* + * Allow NOMMU mmap() to directly map the device (if not NULL) + * - return the address to which the offset maps + * - return -ENOSYS to indicate refusal to do the mapping + */ +static unsigned long maprom_unmapped_area(struct mtd_info *mtd, + unsigned long len, + unsigned long offset, + unsigned long flags) +{ + struct map_info *map = mtd->priv; + return (unsigned long) map->virt + offset; +} + static int maprom_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct map_info *map = mtd->priv; @@ -67,8 +85,13 @@ static void maprom_nop(struct mtd_info *mtd) static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { - printk(KERN_NOTICE "maprom_write called\n"); - return -EIO; + return -EROFS; +} + +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info) +{ + /* We do our best 8) */ + return -EROFS; } static int __init map_rom_init(void) |