mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
3a2f7427fe
date: 1994/05/22 12:35:38; author: joerg; state: Exp; lines: +6 -6
First round of floppy changes. Try making `fd' more robust.
New features:
. ioctl command for setting the drive type (density etc.); restricted
to the super-user
. ioctl for getting/seting `drive options'; currently only option
is FDOPT_NORETRY: inhibit the usual retries; used when verifying
a newly formatted track
Fixes:
. function prototypes
. made all internal functions `static'
. cleaned up & corrected .h files
. restructured, to make the chaotic function sequence more rational
. compiled with -Wall, and cleared all warnings
. introduced a mirror for the (write-only) `digital output register',
to avoid the current kludge
. device probing completed by seeking/recalibrating, and looking
for track 0 being found
. holding the controller down in reset state while it is idle (and
thus saving allot of headaches)
. make requests fail that are not a multiple of the (physical)
sector size
. removed the fixed physical sector size (512 bytes), allowing for any
size the controller could handle (128/256/512/1024 bytes)
. replaced some silly messages
. fixed the TRACE* macro usage, debugging reports should be complete
now again (debugging output is HUGE! though)
. removed fd_timeout for SEEK command; seeks are always reported by
the controller to succeed, since the `success' only refers to the
controller's idea of success - there is no hardware line to tell about
the seek end (other than the `track 0' line)
. catch SENSEI's that report about a `terminated due to READY changed'
status - could happen after a controller reset
. converted ``hz / <something>'' divide operations to divisors that are
powers of two, so gcc can optimize them into shifts
. write/format operations are checked against a write-protected medium
now *prior* starting the operation
. error reports of `invalid command' and `wrong cylinder' will cause
shortcuts in the retrier() now
. fixed a bug in the retrier() causing bogus block numbers to be reported
. fdformat() does care for errors now
Known Bugs:
. no attempts have been made (yet) to improve the performance
. sometimes, bogus ``seek/recalib failed'' messages are logged; this
is still a bug in the driver, but it's not harmful since it's
usually caught by the retrier()
Reviewed by:
Submitted by:
Obtained from:
137 lines
6.2 KiB
C
137 lines
6.2 KiB
C
/*-
|
|
* 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: @(#)nec765.h 7.1 (Berkeley) 5/9/91
|
|
* $Id: nec765.h,v 1.2 1993/10/16 13:48:50 rgrimes Exp $
|
|
*/
|
|
|
|
/*
|
|
* Nec 765 floppy disc controller definitions
|
|
*/
|
|
|
|
/* Main status register */
|
|
#define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */
|
|
#define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */
|
|
#define NE7_CB 0x10 /* Diskette Controller Busy */
|
|
#define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */
|
|
#define NE7_DIO 0x40 /* Diskette Controller Data register I/O */
|
|
#define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */
|
|
|
|
/* Status register ST0 */
|
|
#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005equ_chck\004drive_notrdy\003top_head"
|
|
|
|
#define NE7_ST0_IC 0xc0 /* interrupt completion code */
|
|
|
|
#define NE7_ST0_IC_RC 0xc0 /* terminated due to ready changed, n/a */
|
|
#define NE7_ST0_IC_IV 0x80 /* invalid command; must reset FDC */
|
|
#define NE7_ST0_IC_AT 0x40 /* abnormal termination, check error stat */
|
|
#define NE7_ST0_IC_NT 0x00 /* normal termination */
|
|
|
|
#define NE7_ST0_SE 0x20 /* seek end */
|
|
#define NE7_ST0_EC 0x10 /* equipment check, recalibrated but no trk0 */
|
|
#define NE7_ST0_NR 0x08 /* not ready (n/a) */
|
|
#define NE7_ST0_HD 0x04 /* upper head selected */
|
|
#define NE7_ST0_DR 0x03 /* drive code */
|
|
|
|
/* Status register ST1 */
|
|
#define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am"
|
|
|
|
#define NE7_ST1_EN 0x80 /* end of cylinder, access past last record */
|
|
#define NE7_ST1_DE 0x20 /* data error, CRC fail in ID or data */
|
|
#define NE7_ST1_OR 0x10 /* DMA overrun, DMA failed to do i/o quickly */
|
|
#define NE7_ST1_ND 0x04 /* no data, sector not found or CRC in ID f. */
|
|
#define NE7_ST1_NW 0x02 /* not writeable, attempt to violate WP */
|
|
#define NE7_ST1_MA 0x01 /* missing address mark (in ID or data field)*/
|
|
|
|
/* Status register ST2 */
|
|
#define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam"
|
|
|
|
#define NE7_ST2_CM 0x40 /* control mark; found deleted data */
|
|
#define NE7_ST2_DD 0x20 /* data error in data field, CRC fail */
|
|
#define NE7_ST2_WC 0x10 /* wrong cylinder, ID field mismatches cmd */
|
|
#define NE7_ST2_SH 0x08 /* scan equal hit */
|
|
#define NE7_ST2_SN 0x04 /* scan not satisfied */
|
|
#define NE7_ST2_BC 0x02 /* bad cylinder, cylinder marked 0xff */
|
|
#define NE7_ST2_MD 0x01 /* missing address mark in data field */
|
|
|
|
/* Status register ST3 */
|
|
#define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002"
|
|
|
|
#define NE7_ST3_FT 0x80 /* fault; PC: n/a */
|
|
#define NE7_ST3_WP 0x40 /* write protected */
|
|
#define NE7_ST3_RD 0x20 /* ready; PC: always true */
|
|
#define NE7_ST3_T0 0x10 /* track 0 */
|
|
#define NE7_ST3_TS 0x08 /* two-sided; PC: n/a */
|
|
#define NE7_ST3_HD 0x04 /* upper head select */
|
|
#define NE7_ST3_US 0x03 /* unit select */
|
|
|
|
/* Commands */
|
|
/*
|
|
* the top three bits -- where appropriate -- are set as follows:
|
|
*
|
|
* 0x80 - MT multi-track; allow both sides to be handled in single cmd
|
|
* 0x40 - MFM modified frequency modulation; use MFM encoding
|
|
* 0x20 - SK skip; skip sectors marked as "deleted"
|
|
*/
|
|
#define NE7CMD_READTRK 0x42 /* read whole track */
|
|
#define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit
|
|
parameters byte */
|
|
#define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */
|
|
#define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */
|
|
#define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */
|
|
#define NE7CMD_RECAL 7 /* recalibrate drive - requires
|
|
unit select byte */
|
|
#define NE7CMD_SENSEI 8 /* sense controller interrupt status */
|
|
#define NE7CMD_WRITEDEL 0xc9 /* write deleted data */
|
|
#define NE7CMD_READID 0x4a /* read ID field */
|
|
#define NE7CMD_READDEL 0xec /* read deleted data */
|
|
#define NE7CMD_FORMAT 0x4d /* format - requires five additional bytes */
|
|
#define NE7CMD_SEEK 0x0f /* seek drive - requires unit select byte
|
|
and new cyl byte */
|
|
#define NE7CMD_SCNEQU 0xf1 /* scan equal */
|
|
#define NE7CMD_SCNLE 0xf9 /* scan less or equal */
|
|
#define NE7CMD_SCNGE 0xfd /* scan greater or equal */
|
|
|
|
|
|
/*
|
|
* "specify" definitions
|
|
*
|
|
* acronyms (times are relative to a FDC clock of 8 MHz):
|
|
* srt - step rate; PC usually 3 ms
|
|
* hut - head unload time; PC usually maximum of 240 ms
|
|
* hlt - head load time; PC usually minimum of 2 ms
|
|
* nd - no DMA flag; PC usually not set (0)
|
|
*/
|
|
|
|
#define NE7_SPEC_1(srt, hut) (((16 - (srt)) << 4) | (((hut) / 16)))
|
|
#define NE7_SPEC_2(hlt, nd) (((hlt) & 0xFE) | ((nd) & 1))
|