o add ff lib

o add ff lib samples
o add ff linux sample

tools/ffsample/linux/diskio.c

@@ -0,0 +1,168 @@
+
+#include "integer.h"
+#include "diskio.h"
+
+static volatile
+DSTATUS Stat = STA_NOINIT;  /* Disk status */
+
+/*
+[david@slap]Transfer/ffsample/linux % sudo mkfs.vfat -F 32 -v disk00.vfat                                                                                                                                  [941]
+mkfs.vfat 2.11 (12 Mar 2005)
+disk00.vfat has 64 heads and 32 sectors per track,
+logical sector size is 512,
+using 0xf8 media descriptor, with 8192 sectors;
+file system has 2 32-bit FATs and 1 sector per cluster.
+FAT size is 63 sectors, and provides 8034 clusters.
+Volume ID is 4a1424ec, no volume label.
+*/
+
+/*-----------------------------------------------------------------------*/
+/* Initialize Disk Drive                                                 */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (BYTE drv) {
+    if (drv) return STA_NOINIT;             /* Supports only single drive */
+
+    Stat |= STA_NOINIT;
+    /* map image */
+
+    Stat &= ~STA_NOINIT;                    /* When device goes ready, clear STA_NOINIT */
+    return Stat;
+}
+
+
+/*-----------------------------------------------------------------------*/
+/* Return Disk Status                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (BYTE drv){
+    if (drv) return STA_NOINIT;     /* Supports only single drive */
+    return Stat;
+}
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s)                                                        */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_read (
+    BYTE drv,       /* Physical drive nmuber (0) */
+    BYTE *buff,     /* Data buffer to store read data */
+    DWORD sector,   /* Sector number (LBA) */
+    BYTE count      /* Sector count (1..255) */
+)
+{
+    BYTE c, iord_l, iord_h;
+    if (drv || !count) return RES_PARERR;
+    if (Stat & STA_NOINIT) return RES_NOTRDY;
+
+    /* Issue Read Setor(s) command */
+    /*
+    write_ata(REG_COUNT, count);
+    write_ata(REG_SECTOR, (BYTE)sector);
+    write_ata(REG_CYLL, (BYTE)(sector >> 8));
+    write_ata(REG_CYLH, (BYTE)(sector >> 16));
+    write_ata(REG_DEV, ((BYTE)(sector >> 24) & 0x0F) | LBA);
+    write_ata(REG_COMMAND, CMD_READ);
+    */
+
+    return RES_OK;
+}
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s)                                                       */
+/*-----------------------------------------------------------------------*/
+
+#if _READONLY == 0
+DRESULT disk_write (
+    BYTE drv,           /* Physical drive nmuber (0) */
+    const BYTE *buff,   /* Data to be written */
+    DWORD sector,       /* Sector number (LBA) */
+    BYTE count          /* Sector count (1..255) */
+)
+{
+    BYTE s, c, iowr_l, iowr_h;
+
+
+    if (drv || !count) return RES_PARERR;
+    if (Stat & STA_NOINIT) return RES_NOTRDY;
+
+    /* Issue Write Setor(s) command */
+    /*
+    write_ata(REG_COUNT, count);
+    write_ata(REG_SECTOR, (BYTE)sector);
+    write_ata(REG_CYLL, (BYTE)(sector >> 8));
+    write_ata(REG_CYLH, (BYTE)(sector >> 16));
+    write_ata(REG_DEV, ((BYTE)(sector >> 24) & 0x0F) | LBA);
+    write_ata(REG_COMMAND, CMD_WRITE);
+    */
+
+    return RES_OK;
+}
+#endif /* _READONLY */
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions                                               */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_IOCTL != 0
+DRESULT disk_ioctl (
+    BYTE drv,       /* Physical drive nmuber (0) */
+    BYTE ctrl,      /* Control code */
+    void *buff      /* Buffer to send/receive data block */
+)
+{
+    BYTE n, w, ofs, dl, dh, *ptr = buff;
+
+
+    if (drv) return RES_PARERR;
+    if (Stat & STA_NOINIT) return RES_NOTRDY;
+
+    switch (ctrl) {
+        case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */
+            ofs = 60; w = 2; n = 0;
+            break;
+
+        case GET_SECTOR_SIZE :  /* Get sectors on the disk (WORD) */
+            *(WORD*)buff = 512;
+            return RES_OK;
+
+        case GET_BLOCK_SIZE :   /* Get erase block size in sectors (DWORD) */
+            *(DWORD*)buff = 32;
+            return RES_OK;
+
+        case CTRL_SYNC :        /* Nothing to do */
+            return RES_OK;
+
+        case ATA_GET_REV :      /* Get firmware revision (8 chars) */
+            ofs = 23; w = 4; n = 4;
+            break;
+
+        case ATA_GET_MODEL :    /* Get model name (40 chars) */
+            ofs = 27; w = 20; n = 20;
+            break;
+
+        case ATA_GET_SN :       /* Get serial number (20 chars) */
+            ofs = 10; w = 10; n = 10;
+            break;
+
+        default:
+            return RES_PARERR;
+    }
+
+    /*
+    write_ata(REG_COMMAND, CMD_IDENTIFY);
+    if (!wait_data()) return RES_ERROR;
+    read_part(ptr, ofs, w);
+    while (n--) {
+        dl = *ptr; dh = *(ptr+1);
+        *ptr++ = dh; *ptr++ = dl;
+    }
+    */
+    return RES_OK;
+}
+#endif /* _USE_IOCTL != 0 */
+
+
+
+