1 /* $NetBSD: fdreg.h,v 1.5 1996/02/01 22:32:27 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)fdreg.h 7.1 (Berkeley) 5/9/91 36 */ 37 38 /* 39 * AT floppy controller registers and bitfields 40 */ 41 42 /* uses NEC765 controller */ 43 #include <dev/ic/nec765reg.h> 44 45 #ifndef _LOCORE 46 struct fdreg_77 { 47 u_int8_t fd_statusA; 48 u_int8_t fd_statusB; 49 u_int8_t fd_dor; /* Digital Output Register (R/W) */ 50 u_int8_t fd_tdr; /* Tape Control Register (R/W) */ 51 u_int8_t fd_msr; /* Main Status Register (R) */ 52 #define fd_drs fd_msr /* Data Rate Select Register (W) */ 53 u_int8_t fd_fifo; /* Data (FIFO) register (R/W) */ 54 u_int8_t fd_reserved; 55 u_int8_t fd_dir; /* Digital Input Register (R) */ 56 #define fd_ccr fd_dir /* Configuration Control (W) */ 57 }; 58 59 struct fdreg_72 { 60 u_int8_t fd_msr; /* Main Status Register (R) */ 61 #if already_a_define 62 #define fd_drs fd_msr /* Data Rate Select Register (W) */ 63 #endif 64 u_int8_t fd_fifo; /* Data (FIFO) register (R/W) */ 65 }; 66 67 union fdreg { 68 struct fdreg_72 fun72; 69 struct fdreg_77 fun77; 70 }; 71 #endif 72 73 /* Data Select Register bits */ 74 #define DRS_RESET 0x80 75 #define DRS_POWER 0x40 76 #define DRS_PLL 0x20 77 #define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */ 78 #define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */ 79 #define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */ 80 #define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */ 81 82 /* Digital Output Register bits */ 83 #define FDO_FDSEL 0x03 /* floppy device select */ 84 #define FDO_FRST 0x04 /* floppy controller reset */ 85 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ 86 #define FDO_MOEN(n) ((1 << n) * 0x10) /* motor enable */ 87 88 #define FDI_DCHG 0x80 /* diskette has been changed */ 89 90 /* XXX - find a place for these... */ 91 #define NE7CMD_CFG 0x13 92 #define CFG_EIS 0x40 93 #define CFG_EFIFO 0x20 94 #define CFG_POLL 0x10 95 #define CFG_THRHLD_MASK 0x0f 96 97 #define NE7CMD_LOCK 0x14 98 #define CFG_LOCK 0x80 99 100 #define NE7CMD_MOTOR 0x0b 101 #define MOTOR_ON 0x80 102 103 #define NE7CMD_DUMPREG 0x0e 104 #define NE7CMD_VERSION 0x10 105 106 #define ST1_OVERRUN 0x10 107 108 109