patch-2.1.66 linux/drivers/char/ftape/lowlevel/fdc-io.h

• Lines: 258
• Date: Tue Nov 25 14:45:27 1997
• Orig file: v2.1.65/linux/drivers/char/ftape/lowlevel/fdc-io.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.65/linux/drivers/char/ftape/lowlevel/fdc-io.h linux/drivers/char/ftape/lowlevel/fdc-io.h
@@ -0,0 +1,257 @@
+#ifndef _FDC_IO_H
+#define _FDC_IO_H
+
+/*
+ *    Copyright (C) 1993-1996 Bas Laarhoven,
+ *              (C) 1996-1997 Claus-Justus Heine.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING.  If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ *
+ * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/fdc-io.h,v $
+ * $Revision: 1.3 $
+ * $Date: 1997/10/05 19:18:06 $
+ *
+ *      This file contains the declarations for the low level
+ *      functions that communicate with the floppy disk controller,
+ *      for the QIC-40/80/3010/3020 floppy-tape driver "ftape" for
+ *      Linux.
+ */
+
+#include <linux/fdreg.h>
+
+#include "../lowlevel/ftape-bsm.h"
+
+#define FDC_SK_BIT      (0x20)
+#define FDC_MT_BIT      (0x80)
+
+#define FDC_READ        (FD_READ & ~(FDC_SK_BIT | FDC_MT_BIT))
+#define FDC_WRITE       (FD_WRITE & ~FDC_MT_BIT)
+#define FDC_READ_DELETED  (0x4c)
+#define FDC_WRITE_DELETED (0x49)
+#define FDC_VERIFY        (0x56)
+#define FDC_READID      (0x4a)
+#define FDC_SENSED      (0x04)
+#define FDC_SENSEI      (FD_SENSEI)
+#define FDC_FORMAT      (FD_FORMAT)
+#define FDC_RECAL       (FD_RECALIBRATE)
+#define FDC_SEEK        (FD_SEEK)
+#define FDC_SPECIFY     (FD_SPECIFY)
+#define FDC_RECALIBR    (FD_RECALIBRATE)
+#define FDC_VERSION     (FD_VERSION)
+#define FDC_PERPEND     (FD_PERPENDICULAR)
+#define FDC_DUMPREGS    (FD_DUMPREGS)
+#define FDC_LOCK        (FD_LOCK)
+#define FDC_UNLOCK      (FD_UNLOCK)
+#define FDC_CONFIGURE   (FD_CONFIGURE)
+#define FDC_DRIVE_SPEC  (0x8e)	/* i82078 has this (any others?) */
+#define FDC_PARTID      (0x18)	/* i82078 has this */
+#define FDC_SAVE        (0x2e)	/* i82078 has this (any others?) */
+#define FDC_RESTORE     (0x4e)	/* i82078 has this (any others?) */
+
+#define FDC_STATUS_MASK (STATUS_BUSY | STATUS_DMA | STATUS_DIR | STATUS_READY)
+#define FDC_DATA_READY  (STATUS_READY)
+#define FDC_DATA_OUTPUT (STATUS_DIR)
+#define FDC_DATA_READY_MASK (STATUS_READY | STATUS_DIR)
+#define FDC_DATA_OUT_READY  (STATUS_READY | STATUS_DIR)
+#define FDC_DATA_IN_READY   (STATUS_READY)
+#define FDC_BUSY        (STATUS_BUSY)
+#define FDC_CLK48_BIT   (0x80)
+#define FDC_SEL3V_BIT   (0x40)
+
+#define ST0_INT_MASK    (ST0_INTR)
+#define FDC_INT_NORMAL  (ST0_INTR & 0x00)
+#define FDC_INT_ABNORMAL (ST0_INTR & 0x40)
+#define FDC_INT_INVALID (ST0_INTR & 0x80)
+#define FDC_INT_READYCH (ST0_INTR & 0xC0)
+#define ST0_SEEK_END    (ST0_SE)
+#define ST3_TRACK_0     (ST3_TZ)
+
+#define FDC_RESET_NOT   (0x04)
+#define FDC_DMA_MODE    (0x08)
+#define FDC_MOTOR_0     (0x10)
+#define FDC_MOTOR_1     (0x20)
+
+typedef struct {
+	void (**hook) (void);	/* our wedge into the isr */
+	enum {
+		no_fdc, i8272, i82077, i82077AA, fc10,
+		i82078, i82078_1
+	} type;			/* FDC type */
+	unsigned int irq; /* FDC irq nr */
+	unsigned int dma; /* FDC dma channel nr */
+	__u16 sra;	  /* Status register A (PS/2 only) */
+	__u16 srb;	  /* Status register B (PS/2 only) */
+	__u16 dor;	  /* Digital output register */
+	__u16 tdr;	  /* Tape Drive Register (82077SL-1 &
+			     82078 only) */
+	__u16 msr;	  /* Main Status Register */
+	__u16 dsr;	  /* Datarate Select Register (8207x only) */
+	__u16 fifo;	  /* Data register / Fifo on 8207x */
+	__u16 dir;	  /* Digital Input Register */
+	__u16 ccr;	  /* Configuration Control Register */
+	__u16 dor2;	  /* Alternate dor on MACH-2 controller,
+			     also used with FC-10, meaning unknown */
+} fdc_config_info;
+
+typedef enum {
+	fdc_data_rate_250  = 2,
+	fdc_data_rate_300  = 1,	/* any fdc in default configuration */
+	fdc_data_rate_500  = 0,
+	fdc_data_rate_1000 = 3,
+	fdc_data_rate_2000 = 1,	/* i82078-1: when using Data Rate Table #2 */
+} fdc_data_rate_type;
+
+typedef enum {
+	fdc_idle          = 0,
+	fdc_reading_data  = FDC_READ,
+	fdc_seeking       = FDC_SEEK,
+	fdc_writing_data  = FDC_WRITE,
+	fdc_deleting      = FDC_WRITE_DELETED,
+	fdc_reading_id    = FDC_READID,
+	fdc_recalibrating = FDC_RECAL,
+	fdc_formatting    = FDC_FORMAT,
+	fdc_verifying     = FDC_VERIFY
+} fdc_mode_enum;
+
+typedef enum {
+	waiting = 0,
+	reading,
+	writing,
+	formatting,
+	verifying,
+	deleting,
+	done,
+	error,
+	mmapped,
+} buffer_state_enum;
+
+typedef struct {
+	__u8 *address;
+	volatile buffer_state_enum status;
+	volatile __u8 *ptr;
+	volatile unsigned int bytes;
+	volatile unsigned int segment_id;
+
+	/* bitmap for remainder of segment not yet handled.
+	 * one bit set for each bad sector that must be skipped.
+	 */
+	volatile SectorMap bad_sector_map;
+
+	/* bitmap with bad data blocks in data buffer.
+	 * the errors in this map may be retried.
+	 */
+	volatile SectorMap soft_error_map;
+
+	/* bitmap with bad data blocks in data buffer
+	 * the errors in this map may not be retried.
+	 */
+	volatile SectorMap hard_error_map;
+
+	/* retry counter for soft errors.
+	 */
+	volatile int retry;
+
+	/* sectors to skip on retry ???
+	 */
+	volatile unsigned int skip;
+
+	/* nr of data blocks in data buffer
+	 */
+	volatile unsigned int data_offset;
+
+	/* offset in segment for first sector to be handled.
+	 */
+	volatile unsigned int sector_offset;
+
+	/* size of cluster of good sectors to be handled.
+	 */
+	volatile unsigned int sector_count;
+
+	/* size of remaining part of segment to be handled.
+	 */
+	volatile unsigned int remaining;
+
+	/* points to next segment (contiguous) to be handled,
+	 * or is zero if no read-ahead is allowed.
+	 */
+	volatile unsigned int next_segment;
+
+	/* flag being set if deleted data was read.
+	 */
+	volatile int deleted;
+
+	/* floppy coordinates of first sector in segment */
+	volatile __u8 head;
+	volatile __u8 cyl;
+	volatile __u8 sect;
+
+	/* gap to use when formatting */
+	__u8 gap3;
+	/* flag set when buffer is mmaped */
+	int mmapped;
+} buffer_struct;
+
+/*
+ *      fdc-io.c defined public variables
+ */
+extern volatile fdc_mode_enum fdc_mode;
+extern int fdc_setup_error;	/* outdated ??? */
+extern struct wait_queue *ftape_wait_intr;
+extern int ftape_motor;		/* fdc motor line state */
+extern volatile int ftape_current_cylinder; /* track nr FDC thinks we're on */
+extern volatile __u8 fdc_head;	/* FDC head */
+extern volatile __u8 fdc_cyl;	/* FDC track */
+extern volatile __u8 fdc_sect;	/* FDC sector */
+extern fdc_config_info fdc;	/* FDC hardware configuration */
+
+extern unsigned int ft_fdc_base;
+extern unsigned int ft_fdc_irq;
+extern unsigned int ft_fdc_dma;
+extern unsigned int ft_fdc_threshold;
+extern unsigned int ft_fdc_rate_limit;
+extern int ft_probe_fc10;
+extern int ft_mach2;
+/*
+ *      fdc-io.c defined public functions
+ */
+extern void fdc_catch_stray_interrupts(int count);
+extern int fdc_ready_wait(unsigned int timeout);
+extern int fdc_command(const __u8 * cmd_data, int cmd_len);
+extern int fdc_result(__u8 * res_data, int res_len);
+extern int fdc_issue_command(const __u8 * out_data, int out_count,
+			     __u8 * in_data, int in_count);
+extern int fdc_interrupt_wait(unsigned int time);
+extern int fdc_set_seek_rate(int seek_rate);
+extern int fdc_seek(int track);
+extern int fdc_sense_drive_status(int *st3);
+extern void fdc_motor(int motor);
+extern void fdc_reset(void);
+extern int fdc_recalibrate(void);
+extern void fdc_disable(void);
+extern int fdc_fifo_threshold(__u8 threshold,
+			      int *fifo_state, int *lock_state, int *fifo_thr);
+extern void fdc_wait_calibrate(void);
+extern int fdc_sense_interrupt_status(int *st0, int *current_cylinder);
+extern void fdc_save_drive_specs(void);
+extern void fdc_restore_drive_specs(void);
+extern int fdc_set_data_rate(int rate);
+extern void fdc_set_write_precomp(int precomp);
+extern int fdc_release_irq_and_dma(void);
+extern void fdc_release_regions(void);
+extern int fdc_init(void);
+extern int fdc_setup_read_write(buffer_struct * buff, __u8 operation);
+extern int fdc_setup_formatting(buffer_struct * buff);
+#endif