diff options
Diffstat (limited to 'drivers/char/ftape/lowlevel/fdc-io.h')
| -rw-r--r-- | drivers/char/ftape/lowlevel/fdc-io.h | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/drivers/char/ftape/lowlevel/fdc-io.h b/drivers/char/ftape/lowlevel/fdc-io.h new file mode 100644 index 00000000000..7ec3c72178b --- /dev/null +++ b/drivers/char/ftape/lowlevel/fdc-io.h @@ -0,0 +1,252 @@ +#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 wait_queue_head_t ftape_wait_intr; +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_interrupt_wait(unsigned int time); +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 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 |