Add Block-to-character device driver
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@1237 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
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1c77cd0c64
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@ -550,4 +550,6 @@
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* Each NSH command can not be disabled through a configuration setting. All of these
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settings make the configuration of NSH potentially complex but also allow it to squeeze
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into very small memory footprints.
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* Added a block to character (BCH) driver. This is kind of the reverse of the loop
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device; it allows you access a block device like a character device.
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@ -1193,6 +1193,8 @@ nuttx-0.3.18 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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* Each NSH command can not be disabled through a configuration setting. All of these
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settings make the configuration of NSH potentially complex but also allow it to squeeze
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into very small memory footprints.
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* Added a block to character (BCH) driver. This is kind of the reverse of the loop
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device; it allows you access a block device like a character device.
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pascal-0.1.3 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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@ -53,7 +53,16 @@ ROOTDEPPATH = --dep-path .
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MMCSDDEPPATH = --dep-path mmcsd
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CFLAGS += ${shell $(TOPDIR)/tools/incdir.sh "$(CC)" $(TOPDIR)/drivers/mmcsd}
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ASRCS = $(NET_ASRCS) $(USBDEV_ASRCS) $(MMCSD_ASRCS)
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ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
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ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
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include bch/Make.defs
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ROOTDEPPATH = --dep-path .
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BCHDEPPATH = --dep-path bch
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CFLAGS += ${shell $(TOPDIR)/tools/incdir.sh "$(CC)" $(TOPDIR)/drivers/bch}
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endif
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endif
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ASRCS = $(NET_ASRCS) $(USBDEV_ASRCS) $(MMCSD_ASRCS) $(BCH_ASRCS)
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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CSRCS =
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@ -64,7 +73,7 @@ ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
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CSRCS += ramdisk.c
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endif
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endif
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CSRCS += $(NET_CSRCS) $(USBDEV_CSRCS) $(MMCSD_CSRCS)
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CSRCS += $(NET_CSRCS) $(USBDEV_CSRCS) $(MMCSD_CSRCS) $(BCH_CSRCS)
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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@ -72,7 +81,7 @@ OBJS = $(AOBJS) $(COBJS)
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BIN = libdrivers$(LIBEXT)
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VPATH = net:usbdev:mmcsd
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VPATH = net:usbdev:mmcsd:bch
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all: $(BIN)
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@ -88,7 +97,7 @@ $(BIN): $(OBJS)
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done ; )
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.depend: Makefile $(SRCS)
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@$(MKDEP) $(ROOTDEPPATH) $(NETDEPPATH) $(USBDEVDEPPATH) $(MMCSDDEPPATH) \
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@$(MKDEP) $(ROOTDEPPATH) $(NETDEPPATH) $(USBDEVDEPPATH) $(MMCSDDEPPATH) $(BCHDEPPATH) \
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$(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
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@touch $@
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@ -370,8 +370,28 @@ EXTERN int lib_flushall(FAR struct streamlist *list);
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* subdirectory
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*/
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/* Register /dev/null */
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EXTERN void devnull_register(void);
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EXTERN int losetup(const char *name, int minor, uint16 sectsize);
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/* Setup the loop device so that it exports the file referenced by 'filename'
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* as a block device.
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*/
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EXTERN int losetup(const char *devname, const char *filename, uint16 sectsize,
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off_t offset, boolean readonly);
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EXTERN int loteardown(const char *devname);
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/* Setup so that the block driver referenced by 'blkdev' can be accessed
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* similar to a character device.
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*/
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EXTERN int bchdev_register(const char *blkdev, const char *chardev, boolean readonly);
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EXTERN int bchdev_unregister(const char *chardev);
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EXTERN int bchlib_setup(const char *blkdev, boolean readonly, FAR void **handle);
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EXTERN int bchlib_teardown(FAR void *handle);
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EXTERN ssize_t bchlib_read(FAR void *handle, FAR char *buffer, size_t offset, size_t len);
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EXTERN ssize_t bchlib_write(FAR void *handle, FAR const char *buffer, size_t offset, size_t len);
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#undef EXTERN
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#if defined(__cplusplus)
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@ -53,8 +53,9 @@
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*/
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#define _FIOCBASE (0x8700) /* File system ioctl commands */
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#define _BIOCBASE (0x8800) /* Block driver ioctl commands */
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#define _SIOCBASE (0x8900) /* Socket ioctl commandss */
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#define _DIOCBASE (0x8800) /* Character driver ioctl commands */
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#define _BIOCBASE (0x8900) /* Block driver ioctl commands */
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#define _SIOCBASE (0x8a00) /* Socket ioctl commandss */
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/* Macros used to manage ioctl commands */
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@ -69,10 +70,25 @@
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#define _FIOCVALID(c) (_IOC_TYPE(c)==_FIOCBASE)
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#define _FIOC(nr) _IOC(_FIOCBASE,nr)
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#define FIOC_MMAP _FIOC(0x0001) /* IN: None
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#define FIOC_MMAP _FIOC(0x0001) /* IN: Location to return address (void **)
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* OUT: If media is directly acccesible,
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* return (void*) base address
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* of file */
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* of file
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*/
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/* NuttX file system ioctl definitions */
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#define _DIOCVALID(c) (_IOC_TYPE(c)==_DIOCBASE)
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#define _DIOC(nr) _IOC(_DIOCBASE,nr)
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#define DIOC_GETPRIV _DIOC(0x0001) /* IN: Location to return handle (void **)
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* OUT: Reference to internal data
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* structure. May have a reference
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* incremented.
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*/
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#define DIOC_RELPRIV _DIOC(0x0003) /* IN: None
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* OUT: None, reference obtained by
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* FIOC_GETPRIV released.
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*/
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/* NuttX block driver ioctl definitions */
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