253 lines
7.7 KiB
C
253 lines
7.7 KiB
C
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#ifndef _FDC_IO_H
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#define _FDC_IO_H
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/*
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* Copyright (C) 1993-1996 Bas Laarhoven,
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* (C) 1996-1997 Claus-Justus Heine.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/fdc-io.h,v $
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* $Revision: 1.3 $
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* $Date: 1997/10/05 19:18:06 $
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*
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* This file contains the declarations for the low level
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* functions that communicate with the floppy disk controller,
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* for the QIC-40/80/3010/3020 floppy-tape driver "ftape" for
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* Linux.
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*/
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#include <linux/fdreg.h>
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#include "../lowlevel/ftape-bsm.h"
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#define FDC_SK_BIT (0x20)
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#define FDC_MT_BIT (0x80)
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#define FDC_READ (FD_READ & ~(FDC_SK_BIT | FDC_MT_BIT))
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#define FDC_WRITE (FD_WRITE & ~FDC_MT_BIT)
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#define FDC_READ_DELETED (0x4c)
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#define FDC_WRITE_DELETED (0x49)
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#define FDC_VERIFY (0x56)
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#define FDC_READID (0x4a)
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#define FDC_SENSED (0x04)
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#define FDC_SENSEI (FD_SENSEI)
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#define FDC_FORMAT (FD_FORMAT)
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#define FDC_RECAL (FD_RECALIBRATE)
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#define FDC_SEEK (FD_SEEK)
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#define FDC_SPECIFY (FD_SPECIFY)
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#define FDC_RECALIBR (FD_RECALIBRATE)
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#define FDC_VERSION (FD_VERSION)
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#define FDC_PERPEND (FD_PERPENDICULAR)
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#define FDC_DUMPREGS (FD_DUMPREGS)
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#define FDC_LOCK (FD_LOCK)
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#define FDC_UNLOCK (FD_UNLOCK)
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#define FDC_CONFIGURE (FD_CONFIGURE)
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#define FDC_DRIVE_SPEC (0x8e) /* i82078 has this (any others?) */
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#define FDC_PARTID (0x18) /* i82078 has this */
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#define FDC_SAVE (0x2e) /* i82078 has this (any others?) */
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#define FDC_RESTORE (0x4e) /* i82078 has this (any others?) */
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#define FDC_STATUS_MASK (STATUS_BUSY | STATUS_DMA | STATUS_DIR | STATUS_READY)
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#define FDC_DATA_READY (STATUS_READY)
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#define FDC_DATA_OUTPUT (STATUS_DIR)
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#define FDC_DATA_READY_MASK (STATUS_READY | STATUS_DIR)
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#define FDC_DATA_OUT_READY (STATUS_READY | STATUS_DIR)
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#define FDC_DATA_IN_READY (STATUS_READY)
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#define FDC_BUSY (STATUS_BUSY)
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#define FDC_CLK48_BIT (0x80)
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#define FDC_SEL3V_BIT (0x40)
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#define ST0_INT_MASK (ST0_INTR)
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#define FDC_INT_NORMAL (ST0_INTR & 0x00)
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#define FDC_INT_ABNORMAL (ST0_INTR & 0x40)
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#define FDC_INT_INVALID (ST0_INTR & 0x80)
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#define FDC_INT_READYCH (ST0_INTR & 0xC0)
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#define ST0_SEEK_END (ST0_SE)
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#define ST3_TRACK_0 (ST3_TZ)
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#define FDC_RESET_NOT (0x04)
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#define FDC_DMA_MODE (0x08)
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#define FDC_MOTOR_0 (0x10)
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#define FDC_MOTOR_1 (0x20)
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typedef struct {
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void (**hook) (void); /* our wedge into the isr */
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enum {
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no_fdc, i8272, i82077, i82077AA, fc10,
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i82078, i82078_1
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} type; /* FDC type */
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unsigned int irq; /* FDC irq nr */
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unsigned int dma; /* FDC dma channel nr */
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__u16 sra; /* Status register A (PS/2 only) */
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__u16 srb; /* Status register B (PS/2 only) */
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__u16 dor; /* Digital output register */
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__u16 tdr; /* Tape Drive Register (82077SL-1 &
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82078 only) */
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__u16 msr; /* Main Status Register */
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__u16 dsr; /* Datarate Select Register (8207x only) */
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__u16 fifo; /* Data register / Fifo on 8207x */
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__u16 dir; /* Digital Input Register */
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__u16 ccr; /* Configuration Control Register */
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__u16 dor2; /* Alternate dor on MACH-2 controller,
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also used with FC-10, meaning unknown */
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} fdc_config_info;
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typedef enum {
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fdc_data_rate_250 = 2,
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fdc_data_rate_300 = 1, /* any fdc in default configuration */
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fdc_data_rate_500 = 0,
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fdc_data_rate_1000 = 3,
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fdc_data_rate_2000 = 1, /* i82078-1: when using Data Rate Table #2 */
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} fdc_data_rate_type;
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typedef enum {
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fdc_idle = 0,
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fdc_reading_data = FDC_READ,
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fdc_seeking = FDC_SEEK,
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fdc_writing_data = FDC_WRITE,
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fdc_deleting = FDC_WRITE_DELETED,
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fdc_reading_id = FDC_READID,
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fdc_recalibrating = FDC_RECAL,
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fdc_formatting = FDC_FORMAT,
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fdc_verifying = FDC_VERIFY
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} fdc_mode_enum;
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typedef enum {
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waiting = 0,
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reading,
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writing,
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formatting,
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verifying,
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deleting,
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done,
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error,
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mmapped,
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} buffer_state_enum;
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typedef struct {
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__u8 *address;
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volatile buffer_state_enum status;
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volatile __u8 *ptr;
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volatile unsigned int bytes;
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volatile unsigned int segment_id;
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/* bitmap for remainder of segment not yet handled.
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* one bit set for each bad sector that must be skipped.
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*/
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volatile SectorMap bad_sector_map;
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/* bitmap with bad data blocks in data buffer.
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* the errors in this map may be retried.
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*/
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volatile SectorMap soft_error_map;
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/* bitmap with bad data blocks in data buffer
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* the errors in this map may not be retried.
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*/
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volatile SectorMap hard_error_map;
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/* retry counter for soft errors.
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*/
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volatile int retry;
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/* sectors to skip on retry ???
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*/
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volatile unsigned int skip;
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/* nr of data blocks in data buffer
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*/
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volatile unsigned int data_offset;
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/* offset in segment for first sector to be handled.
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*/
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volatile unsigned int sector_offset;
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/* size of cluster of good sectors to be handled.
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*/
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volatile unsigned int sector_count;
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/* size of remaining part of segment to be handled.
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*/
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volatile unsigned int remaining;
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/* points to next segment (contiguous) to be handled,
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* or is zero if no read-ahead is allowed.
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*/
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volatile unsigned int next_segment;
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/* flag being set if deleted data was read.
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*/
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volatile int deleted;
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/* floppy coordinates of first sector in segment */
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volatile __u8 head;
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volatile __u8 cyl;
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volatile __u8 sect;
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/* gap to use when formatting */
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__u8 gap3;
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/* flag set when buffer is mmaped */
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int mmapped;
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} buffer_struct;
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/*
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* fdc-io.c defined public variables
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*/
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extern volatile fdc_mode_enum fdc_mode;
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extern int fdc_setup_error; /* outdated ??? */
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extern wait_queue_head_t ftape_wait_intr;
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extern volatile int ftape_current_cylinder; /* track nr FDC thinks we're on */
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extern volatile __u8 fdc_head; /* FDC head */
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extern volatile __u8 fdc_cyl; /* FDC track */
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extern volatile __u8 fdc_sect; /* FDC sector */
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extern fdc_config_info fdc; /* FDC hardware configuration */
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extern unsigned int ft_fdc_base;
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extern unsigned int ft_fdc_irq;
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extern unsigned int ft_fdc_dma;
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extern unsigned int ft_fdc_threshold;
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extern unsigned int ft_fdc_rate_limit;
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extern int ft_probe_fc10;
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extern int ft_mach2;
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/*
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* fdc-io.c defined public functions
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*/
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extern void fdc_catch_stray_interrupts(int count);
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extern int fdc_ready_wait(unsigned int timeout);
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extern int fdc_command(const __u8 * cmd_data, int cmd_len);
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extern int fdc_result(__u8 * res_data, int res_len);
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extern int fdc_interrupt_wait(unsigned int time);
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extern int fdc_seek(int track);
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extern int fdc_sense_drive_status(int *st3);
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extern void fdc_motor(int motor);
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extern void fdc_reset(void);
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extern void fdc_disable(void);
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extern int fdc_fifo_threshold(__u8 threshold,
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int *fifo_state, int *lock_state, int *fifo_thr);
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extern void fdc_wait_calibrate(void);
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extern int fdc_sense_interrupt_status(int *st0, int *current_cylinder);
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extern void fdc_save_drive_specs(void);
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extern void fdc_restore_drive_specs(void);
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extern int fdc_set_data_rate(int rate);
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extern void fdc_set_write_precomp(int precomp);
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extern int fdc_release_irq_and_dma(void);
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extern void fdc_release_regions(void);
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extern int fdc_init(void);
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extern int fdc_setup_read_write(buffer_struct * buff, __u8 operation);
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extern int fdc_setup_formatting(buffer_struct * buff);
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#endif
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