Release 4.12 include/uapi/linux/fdreg.h
#ifndef _LINUX_FDREG_H
#define _LINUX_FDREG_H
/*
* This file contains some defines for the floppy disk controller.
* Various sources. Mostly "IBM Microcomputers: A Programmers
* Handbook", Sanches and Canton.
*/
#ifdef FDPATCHES
#define FD_IOPORT fdc_state[fdc].address
#else
/* It would be a lot saner just to force fdc_state[fdc].address to always
be set ! FIXME */
#define FD_IOPORT 0x3f0
#endif
/* Fd controller regs. S&C, about page 340 */
#define FD_STATUS (4 + FD_IOPORT )
#define FD_DATA (5 + FD_IOPORT )
/* Digital Output Register */
#define FD_DOR (2 + FD_IOPORT )
/* Digital Input Register (read) */
#define FD_DIR (7 + FD_IOPORT )
/* Diskette Control Register (write)*/
#define FD_DCR (7 + FD_IOPORT )
/* Bits of main status register */
#define STATUS_BUSYMASK 0x0F
/* drive busy mask */
#define STATUS_BUSY 0x10
/* FDC busy */
#define STATUS_DMA 0x20
/* 0- DMA mode */
#define STATUS_DIR 0x40
/* 0- cpu->fdc */
#define STATUS_READY 0x80
/* Data reg ready */
/* Bits of FD_ST0 */
#define ST0_DS 0x03
/* drive select mask */
#define ST0_HA 0x04
/* Head (Address) */
#define ST0_NR 0x08
/* Not Ready */
#define ST0_ECE 0x10
/* Equipment check error */
#define ST0_SE 0x20
/* Seek end */
#define ST0_INTR 0xC0
/* Interrupt code mask */
/* Bits of FD_ST1 */
#define ST1_MAM 0x01
/* Missing Address Mark */
#define ST1_WP 0x02
/* Write Protect */
#define ST1_ND 0x04
/* No Data - unreadable */
#define ST1_OR 0x10
/* OverRun */
#define ST1_CRC 0x20
/* CRC error in data or addr */
#define ST1_EOC 0x80
/* End Of Cylinder */
/* Bits of FD_ST2 */
#define ST2_MAM 0x01
/* Missing Address Mark (again) */
#define ST2_BC 0x02
/* Bad Cylinder */
#define ST2_SNS 0x04
/* Scan Not Satisfied */
#define ST2_SEH 0x08
/* Scan Equal Hit */
#define ST2_WC 0x10
/* Wrong Cylinder */
#define ST2_CRC 0x20
/* CRC error in data field */
#define ST2_CM 0x40
/* Control Mark = deleted */
/* Bits of FD_ST3 */
#define ST3_HA 0x04
/* Head (Address) */
#define ST3_DS 0x08
/* drive is double-sided */
#define ST3_TZ 0x10
/* Track Zero signal (1=track 0) */
#define ST3_RY 0x20
/* drive is ready */
#define ST3_WP 0x40
/* Write Protect */
#define ST3_FT 0x80
/* Drive Fault */
/* Values for FD_COMMAND */
#define FD_RECALIBRATE 0x07
/* move to track 0 */
#define FD_SEEK 0x0F
/* seek track */
#define FD_READ 0xE6
/* read with MT, MFM, SKip deleted */
#define FD_WRITE 0xC5
/* write with MT, MFM */
#define FD_SENSEI 0x08
/* Sense Interrupt Status */
#define FD_SPECIFY 0x03
/* specify HUT etc */
#define FD_FORMAT 0x4D
/* format one track */
#define FD_VERSION 0x10
/* get version code */
#define FD_CONFIGURE 0x13
/* configure FIFO operation */
#define FD_PERPENDICULAR 0x12
/* perpendicular r/w mode */
#define FD_GETSTATUS 0x04
/* read ST3 */
#define FD_DUMPREGS 0x0E
/* dump the contents of the fdc regs */
#define FD_READID 0xEA
/* prints the header of a sector */
#define FD_UNLOCK 0x14
/* Fifo config unlock */
#define FD_LOCK 0x94
/* Fifo config lock */
#define FD_RSEEK_OUT 0x8f
/* seek out (i.e. to lower tracks) */
#define FD_RSEEK_IN 0xcf
/* seek in (i.e. to higher tracks) */
/* the following commands are new in the 82078. They are not used in the
* floppy driver, except the first three. These commands may be useful for apps
* which use the FDRAWCMD interface. For doc, get the 82078 spec sheets at
* http://www.intel.com/design/archives/periphrl/docs/29046803.htm */
#define FD_PARTID 0x18
/* part id ("extended" version cmd) */
#define FD_SAVE 0x2e
/* save fdc regs for later restore */
#define FD_DRIVESPEC 0x8e
/* drive specification: Access to the
* 2 Mbps data transfer rate for tape
* drives */
#define FD_RESTORE 0x4e
/* later restore */
#define FD_POWERDOWN 0x27
/* configure FDC's powersave features */
#define FD_FORMAT_N_WRITE 0xef
/* format and write in one go. */
#define FD_OPTION 0x33
/* ISO format (which is a clean way to
* pack more sectors on a track) */
/* DMA commands */
#define DMA_READ 0x46
#define DMA_WRITE 0x4A
/* FDC version return types */
#define FDC_NONE 0x00
#define FDC_UNKNOWN 0x10
/* DO NOT USE THIS TYPE EXCEPT IF IDENTIFICATION
FAILS EARLY */
#define FDC_8272A 0x20
/* Intel 8272a, NEC 765 */
#define FDC_765ED 0x30
/* Non-Intel 1MB-compatible FDC, can't detect */
#define FDC_82072 0x40
/* Intel 82072; 8272a + FIFO + DUMPREGS */
#define FDC_82072A 0x45
/* 82072A (on Sparcs) */
#define FDC_82077_ORIG 0x51
/* Original version of 82077AA, sans LOCK */
#define FDC_82077 0x52
/* 82077AA-1 */
#define FDC_82078_UNKN 0x5f
/* Unknown 82078 variant */
#define FDC_82078 0x60
/* 44pin 82078 or 64pin 82078SL */
#define FDC_82078_1 0x61
/* 82078-1 (2Mbps fdc) */
#define FDC_S82078B 0x62
/* S82078B (first seen on Adaptec AVA-2825 VLB
* SCSI/EIDE/Floppy controller) */
#define FDC_87306 0x63
/* National Semiconductor PC 87306 */
/*
* Beware: the fdc type list is roughly sorted by increasing features.
* Presence of features is tested by comparing the FDC version id with the
* "oldest" version that has the needed feature.
* If during FDC detection, an obscure test fails late in the sequence, don't
* assign FDC_UNKNOWN. Else the FDC will be treated as a dumb 8272a, or worse.
* This is especially true if the tests are unneeded.
*/
#define FD_RESET_DELAY 20
#endif
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