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author | dg <dg@FreeBSD.org> | 1994-09-17 16:56:10 +0000 |
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committer | dg <dg@FreeBSD.org> | 1994-09-17 16:56:10 +0000 |
commit | 0285e6bafcab4b972c40c1d78ac266295dc5d80f (patch) | |
tree | 04e7afb126a8687648474c1e093925c58ebecf67 /sys/dev/ic/nec765.h | |
parent | 2097dca3f5f4524ecf441dae533fcf5ee46c98c2 (diff) | |
download | FreeBSD-src-0285e6bafcab4b972c40c1d78ac266295dc5d80f.zip FreeBSD-src-0285e6bafcab4b972c40c1d78ac266295dc5d80f.tar.gz |
Updated driver to the 1.1.5 version:
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:
Diffstat (limited to 'sys/dev/ic/nec765.h')
-rw-r--r-- | sys/dev/ic/nec765.h | 72 |
1 files changed, 68 insertions, 4 deletions
diff --git a/sys/dev/ic/nec765.h b/sys/dev/ic/nec765.h index 1895db7..9f93b70 100644 --- a/sys/dev/ic/nec765.h +++ b/sys/dev/ic/nec765.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91 - * $Id$ + * $Id: nec765.h,v 1.2 1993/10/16 13:48:50 rgrimes Exp $ */ /* @@ -47,26 +47,90 @@ #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ /* Status register ST0 */ -#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head" +#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_FORMAT 0x4c /* format - requires five additional bytes */ #define NE7CMD_RECAL 7 /* recalibrate drive - requires unit select byte */ #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ -#define NE7CMD_SEEK 15 /* seek drive - requires unit select byte +#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)) |