Block-to-character driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1235 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 101 insertions, 0 deletions

diff --git a/nuttx/drivers/bch/bch_internal.h b/nuttx/drivers/bch/bch_internal.h
new file mode 100644
index 000000000..5e1e6d0ab
--- /dev/null
+++ b/nuttx/drivers/bch/bch_internal.h
@@ -0,0 +1,101 @@
+/****************************************************************************
+ * drivers/bch/bch_internal.h
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __FS_BCH_INTERNAL_H
+#define __FS_BCH_INTERNAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <semaphore.h>
+#include <nuttx/fs.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+#define bchlib_semgive(d) sem_post(&(d)->sem)  /* To match bchlib_semtake */
+#define MAX_OPENCNT     (255)                  /* Limit of ubyte */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+struct bchlib_s
+{
+  struct  inode *inode; /* I-node of the block driver */
+  sem_t   sem;          /* For atomic accesses to this structure */
+  size_t  nsectors;     /* Number of sectors supported by the device */
+  size_t  sector;       /* The current sector in the buffer */
+  uint16  sectsize;     /* The size of one sector on the device */
+  ubyte   refs;         /* Number of references */
+  boolean dirty;        /* Data has been written to the buffer */
+  boolean readonly;     /* TRUE:  Only read operations are supported */
+  FAR ubyte *buffer;    /* One sector buffer */
+};
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+EXTERN struct file_operations bch_fops;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+EXTERN void bchlib_semtake(FAR struct bchlib_s *bch);
+EXTERN int  bchlib_incref(FAR struct bchlib_s *bch);
+EXTERN int  bchlib_decref(FAR struct bchlib_s *bch);
+EXTERN int  bchlib_flushsector(FAR struct bchlib_s *bch);
+EXTERN int  bchlib_readsector(FAR struct bchlib_s *bch, size_t sector);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __FS_BCH_INTERNAL_H */