diff options
Diffstat (limited to 'sys/dev/fdc/fdcreg.h')
| -rw-r--r-- | sys/dev/fdc/fdcreg.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sys/dev/fdc/fdcreg.h b/sys/dev/fdc/fdcreg.h new file mode 100644 index 0000000..c082668 --- /dev/null +++ b/sys/dev/fdc/fdcreg.h @@ -0,0 +1,71 @@ +/*- + * Copyright (c) 1991 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: @(#)fdreg.h 7.1 (Berkeley) 5/9/91 + * $FreeBSD$ + */ + +/* + * AT floppy controller registers and bitfields + */ + +/* uses NEC765 controller */ +#include <dev/ic/nec765.h> + +/* registers */ +#define FDOUT 2 /* Digital Output Register (W) */ +#define FDO_FDSEL 0x03 /* floppy device select */ +#define FDO_FRST 0x04 /* floppy controller reset */ +#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ +#define FDO_MOEN0 0x10 /* motor enable drive 0 */ +#define FDO_MOEN1 0x20 /* motor enable drive 1 */ +#define FDO_MOEN2 0x40 /* motor enable drive 2 */ +#define FDO_MOEN3 0x80 /* motor enable drive 3 */ + +#define FDSTS 4 /* NEC 765 Main Status Register (R) */ +#define FDDATA 5 /* NEC 765 Data Register (R/W) */ +#define FDCTL 7 /* Control Register (W) */ + +/* + * The definitions for FDC_500KBPS etc. have been moved out to <sys/fdcio.h> + * since they need to be visible in userland. They cover the lower two bits + * of FDCTL when used for output. + */ +/* + * this is the secret PIO data port (offset from base) + */ +#define FDC_YE_DATAPORT 6 + +#define FDIN 7 /* Digital Input Register (R) */ +#define FDI_DCHG 0x80 /* diskette has been changed */ + /* requires drive and motor being selected */ + /* is cleared by any step pulse to drive */ |
