80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
#ifndef _LINUX_FDREG_H
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#define _LINUX_FDREG_H
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/*
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** WD1772 stuff
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*/
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/* register codes */
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#define FDCSELREG_STP (0x80) /* command/status register */
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#define FDCSELREG_TRA (0x82) /* track register */
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#define FDCSELREG_SEC (0x84) /* sector register */
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#define FDCSELREG_DTA (0x86) /* data register */
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/* register names for FDC_READ/WRITE macros */
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#define FDCREG_CMD 0
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#define FDCREG_STATUS 0
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#define FDCREG_TRACK 2
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#define FDCREG_SECTOR 4
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#define FDCREG_DATA 6
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/* command opcodes */
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#define FDCCMD_RESTORE (0x00) /* - */
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#define FDCCMD_SEEK (0x10) /* | */
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#define FDCCMD_STEP (0x20) /* | TYP 1 Commands */
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#define FDCCMD_STIN (0x40) /* | */
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#define FDCCMD_STOT (0x60) /* - */
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#define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */
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#define FDCCMD_WRSEC (0xa0) /* - " */
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#define FDCCMD_RDADR (0xc0) /* - */
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#define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */
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#define FDCCMD_WRTRA (0xf0) /* - */
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#define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */
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/* command modifier bits */
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#define FDCCMDADD_SR6 (0x00) /* step rate settings */
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#define FDCCMDADD_SR12 (0x01)
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#define FDCCMDADD_SR2 (0x02)
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#define FDCCMDADD_SR3 (0x03)
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#define FDCCMDADD_V (0x04) /* verify */
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#define FDCCMDADD_H (0x08) /* wait for spin-up */
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#define FDCCMDADD_U (0x10) /* update track register */
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#define FDCCMDADD_M (0x10) /* multiple sector access */
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#define FDCCMDADD_E (0x04) /* head settling flag */
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#define FDCCMDADD_P (0x02) /* precompensation off */
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#define FDCCMDADD_A0 (0x01) /* DAM flag */
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/* status register bits */
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#define FDCSTAT_MOTORON (0x80) /* motor on */
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#define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */
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#define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */
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#define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */
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#define FDCSTAT_RECNF (0x10) /* record not found */
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#define FDCSTAT_CRC (0x08) /* CRC error */
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#define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */
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#define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */
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#define FDCSTAT_IDX (0x02) /* Index status (Type I) */
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#define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */
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#define FDCSTAT_BUSY (0x01) /* FDC is busy */
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/* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */
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#define DSKSIDE (0x01)
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#define DSKDRVNONE (0x06)
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#define DSKDRV0 (0x02)
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#define DSKDRV1 (0x04)
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/* step rates */
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#define FDCSTEP_6 0x00
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#define FDCSTEP_12 0x01
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#define FDCSTEP_2 0x02
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#define FDCSTEP_3 0x03
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#endif
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