19 static ff_diskio_impl_t * s_impls[FF_VOLUMES] = { NULL };  variable
32         if (!s_impls[i]) {  in ff_diskio_get_drive()
44     if (s_impls[pdrv]) {  in ff_diskio_register()
45         ff_diskio_impl_t* im = s_impls[pdrv];  in ff_diskio_register()
46         s_impls[pdrv] = NULL;  in ff_diskio_register()
57     s_impls[pdrv] = impl;  in ff_diskio_register()
62     return s_impls[pdrv]->init(pdrv);  in ff_disk_initialize()
66     return s_impls[pdrv]->status(pdrv);  in ff_disk_status()
70     return s_impls[pdrv]->read(pdrv, buff, sector, count);  in ff_disk_read()
74     return s_impls[pdrv]->write(pdrv, buff, sector, count);  in ff_disk_write()
78     return s_impls[pdrv]->ioctl(pdrv, cmd, buff);  in ff_disk_ioctl()