playing around with pffs (NOT FINISHED, DOESNT COMPILE!)

[my-code/arm.git] / betty / pffs.h

diff --git a/betty/pffs.h b/betty/pffs.h
index 72ec880..faf0d38 100644 (file)
--- a/betty/pffs.h
+++ b/betty/pffs.h
@@ -10,19 +10,37 @@
 
 #include "lpc2xxx.h"
 #include "types.h"
+#include "functions.h"
 
 /* defines */
+#define PFFS_MAX_FILENAME_SIZE 15              // in words
+#define PFFS_HEADER_SIZE       3               // in words
 
 #define PFFS_REGISTERED                (1<<0)
 
 #define PFFS_INDEX_MAGIC       0x7000
 
+#define PFFS_INDEX_MAGIC_MASK  0xf000
+#define PFFS_RESERVED_MASK     0x0f00
+#define PFFS_FNLEN_MASK                0x00f0
+#define PFFS_LEN_MSB_MASK      0x000f
+
+/* file modes */
+#define PFFS_READ              0x01
+#define PFFS_WRITE             0x02
+#define PFFS_RDWR              0x03
+
+/* pffs write / read return codes */
+#define PFFS_FILE_EXISTS       0x01
+#define PFFS_FILE_NOT_FOUND    0x02
+#define PFFS_NO_SPACE_LEFT     0x04
+#define PFFS_FILENAME_TOO_LONG 0x08
+
 /* type definitions */
 
 typedef struct s_pffs {
        /* flash specs */
        u32 base_addr;
-       u8 sec_num;
        u32 *sec_addr;
        /* flash write, read and sector erase function pointers */
        int (*fw)(u32 addr,u16 *buf,int len);
@@ -30,12 +48,26 @@ typedef struct s_pffs {
        int (*fe)(u32 addr);
        /* pffs internal variables */
        u8 state;
-       u32 data_ptr;
-       u32 index_ptr;
-       u8 sec_num_data[2];
-       u8 sec_num_index[2];
+       u32 data_ptr;                   // pointer where new data goes
+       u32 index_ptr[3];               // 0: start, 1: new, 2: current
+       u8 sec_num_data[2];             // data start/end sectors
+       u8 sec_num_index[2];            // 2 index sectors
 } t_pffs;
 
+typedef struct s_pffs_fd {
+       u32 daddr;
+       u32 iaddr;
+       char file[PFFS_MAX_FILENAME_SIZE+PFFS_MAX_FILENAME_SIZE];
+       u8 fn_size;
+       u8 mode;
+       t_pffs *pffs;
+} t_pffs_fd;
+
 /* function prototypes */
+int pffs_open(t_pffs *pffs,char *file,u8 mode);
+int pffs_write(t_pffs *pffs,int fd,u8 *buf,int len);
+int pffs_read(t_pffs *pffs,int fd,u8 *buf,int len);
+int pffs_close(t_pffs *pffs,int fd);
+int pffs_unlink(t_pffs *pffs,char *file);
 
 #endif