int data_transfer(int dev,int block,int size,unsigned char *data,int cmd) {
struct device *device;
int err = -1;
device = get_dev(dev);
if(! device ) {
printf("device %d not found in function %s,line %d\n",dev,__FUNCTION__,__LINE__);
goto out;
}
err = do_data_transfer(device,block,size,data,cmd);
out:
return err;
}
int data_transfer_name(const char *dev_name,int block,int size,unsigned char *data,int cmd) {
struct device *device;
int err = -1;
device = get_dev_by_name(dev_name);
if(! device ) {
printf("device %s not found in Function %s,Line %d\n",dev_name,__FUNCTION__,__LINE__);
goto out;
}
err = do_data_transfer(device,block,size,data,cmd);
out:
return err;
}
static int host_request(struct mmc *dev,
struct mmc_cmd *cmd,
struct mmc_data *data)
{
int result;
if (data)
result = do_data_transfer(dev, cmd, data);
else
result = do_command(dev, cmd);
return result;
}
static int read_fatsb (struct mountpoint *mp) {
bpb *bootparam;
int err = -1;
int major;
if(! mp->dev) {
goto out;
}
major = MAJOR(mp->dev->dev);
bootparam = (void *)slab_alloc (sizeof(bpb), 0);
do_data_transfer(mp->dev,0,blkdev[major].block_size,(unsigned char *)bootparam, READ);
printf ("FAT12: SuperBlock read\n");
mp->fs->fssb.blocksize = bootparam->sec_clu * bootparam->bytes_sec;
mp->fs->fssb.root_inode = bootparam->no_fats*bootparam->fat_sectors + bootparam->rsvd_sec;
mp->fs->fssb.root_size = bootparam->no_root;
mp->fs->fssb.spc_fs = bootparam;
err = 0;
out:
return err;
}
