first commit for opensource

first commit for opensource

components/fs/fatfs/wrapper/tos_diskio.c

@@ -0,0 +1,130 @@
+/*-----------------------------------------------------------------------*/
+/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2016        */
+/*-----------------------------------------------------------------------*/
+/* If a working storage control module is available, it should be        */
+/* attached to the FatFs via a glue function rather than modifying it.   */
+/* This is an example of glue functions to attach various exsisting      */
+/* storage control modules to the FatFs module with a defined API.       */
+/*-----------------------------------------------------------------------*/
+
+#include "tos_ff.h"			/* Obtains integer types */
+#include "tos_diskio.h"		/* Declarations of disk functions */
+
+DSTATUS tos_disk_status (
+	vfs_inode_t *dev
+)
+{
+    vfs_blkdev_geo_t geo;
+
+    if (!dev || !dev->ops.bd_ops->geometry) {
+        return STA_NODISK;
+    }
+
+    if (dev->ops.bd_ops->geometry(dev, &geo) != 0) {
+        return STA_NOINIT;
+    }
+
+    if (!geo.is_available) {
+        return STA_NOINIT;
+    }
+
+    return 0;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS tos_disk_initialize (
+	vfs_inode_t *dev
+)
+{
+    if (!dev || !dev->ops.bd_ops->open) {
+        return STA_NODISK;
+    }
+
+    if (dev->ops.bd_ops->open(dev) != 0) {
+        return STA_NOINIT;
+    }
+
+    return 0;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s)                                                        */
+/*-----------------------------------------------------------------------*/
+
+DRESULT tos_disk_read (
+	vfs_inode_t *dev,
+	BYTE *buff,		/* Data buffer to store read data */
+	DWORD sector,	/* Start sector in LBA */
+	UINT count		/* Number of sectors to read */
+)
+{
+    if (!dev || !dev->ops.bd_ops->read) {
+        return RES_PARERR;
+    }
+
+    if (dev->ops.bd_ops->read(dev, buff, sector, count) != 0) {
+        return RES_ERROR;
+    }
+
+    return RES_OK;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s)                                                       */
+/*-----------------------------------------------------------------------*/
+
+#if FF_FS_READONLY == 0
+
+DRESULT tos_disk_write (
+	vfs_inode_t *dev,
+	const BYTE *buff,	/* Data to be written */
+	DWORD sector,		/* Start sector in LBA */
+	UINT count			/* Number of sectors to write */
+)
+{
+    if (!dev || !dev->ops.bd_ops->write) {
+        return RES_PARERR;
+    }
+
+    if (dev->ops.bd_ops->write(dev, buff, sector, count) != 0) {
+        return RES_ERROR;
+    }
+
+    return RES_OK;
+}
+
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions                                               */
+/*-----------------------------------------------------------------------*/
+
+DRESULT tos_disk_ioctl (
+	vfs_inode_t *dev,
+	BYTE cmd,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+    if (!dev || !dev->ops.bd_ops->ioctl) {
+        return RES_PARERR;
+    }
+
+    if (dev->ops.bd_ops->ioctl(dev, cmd, (unsigned long)buff) != 0) {
+        return RES_ERROR;
+    }
+
+    return RES_OK;
+}
+
+
+