include/linux/fdreg.h

/* */
   1 #ifndef _LINUX_FDREG_H
   2 #define _LINUX_FDREG_H
   3 /*
   4  * This file contains some defines for the floppy disk controller.
   5  * Various sources. Mostly "IBM Microcomputers: A Programmers
   6  * Handbook", Sanches and Canton.
   7  */
   8 
   9 extern int ticks_to_floppy_on(unsigned int nr);
  10 extern void floppy_on(unsigned int nr);
  11 extern void floppy_off(unsigned int nr);
  12 extern void floppy_select(unsigned int nr);
  13 extern void floppy_deselect(unsigned int nr);
  14 
  15 /* Fd controller regs. S&C, about page 340 */
  16 #define FD_STATUS       0x3f4
  17 #define FD_DATA         0x3f5
  18 #define FD_DOR          0x3f2           /* Digital Output Register */
  19 #define FD_DIR          0x3f7           /* Digital Input Register (read) */
  20 #define FD_DCR          0x3f7           /* Diskette Control Register (write)*/
  21 
  22 /* Bits of main status register */
  23 #define STATUS_BUSYMASK 0x0F            /* drive busy mask */
  24 #define STATUS_BUSY     0x10            /* FDC busy */
  25 #define STATUS_DMA      0x20            /* 0- DMA mode */
  26 #define STATUS_DIR      0x40            /* 0- cpu->fdc */
  27 #define STATUS_READY    0x80            /* Data reg ready */
  28 
  29 /* Bits of FD_ST0 */
  30 #define ST0_DS          0x03            /* drive select mask */
  31 #define ST0_HA          0x04            /* Head (Address) */
  32 #define ST0_NR          0x08            /* Not Ready */
  33 #define ST0_ECE         0x10            /* Equipment chech error */
  34 #define ST0_SE          0x20            /* Seek end */
  35 #define ST0_INTR        0xC0            /* Interrupt code mask */
  36 
  37 /* Bits of FD_ST1 */
  38 #define ST1_MAM         0x01            /* Missing Address Mark */
  39 #define ST1_WP          0x02            /* Write Protect */
  40 #define ST1_ND          0x04            /* No Data - unreadable */
  41 #define ST1_OR          0x10            /* OverRun */
  42 #define ST1_CRC         0x20            /* CRC error in data or addr */
  43 #define ST1_EOC         0x80            /* End Of Cylinder */
  44 
  45 /* Bits of FD_ST2 */
  46 #define ST2_MAM         0x01            /* Missing Addess Mark (again) */
  47 #define ST2_BC          0x02            /* Bad Cylinder */
  48 #define ST2_SNS         0x04            /* Scan Not Satisfied */
  49 #define ST2_SEH         0x08            /* Scan Equal Hit */
  50 #define ST2_WC          0x10            /* Wrong Cylinder */
  51 #define ST2_CRC         0x20            /* CRC error in data field */
  52 #define ST2_CM          0x40            /* Control Mark = deleted */
  53 
  54 /* Bits of FD_ST3 */
  55 #define ST3_HA          0x04            /* Head (Address) */
  56 #define ST3_TZ          0x10            /* Track Zero signal (1=track 0) */
  57 #define ST3_WP          0x40            /* Write Protect */
  58 
  59 /* Values for FD_COMMAND */
  60 #define FD_RECALIBRATE          0x07    /* move to track 0 */
  61 #define FD_SEEK                 0x0F    /* seek track */
  62 #define FD_READ                 0xE6    /* read with MT, MFM, SKip deleted */
  63 #define FD_WRITE                0xC5    /* write with MT, MFM */
  64 #define FD_SENSEI               0x08    /* Sense Interrupt Status */
  65 #define FD_SPECIFY              0x03    /* specify HUT etc */
  66 #define FD_FORMAT               0x4D    /* format one track */
  67 #define FD_VERSION              0x10    /* get version code */
  68 #define FD_CONFIGURE            0x13    /* configure FIFO operation */
  69 #define FD_PERPENDICULAR        0x12    /* perpendicular r/w mode */
  70 
  71 /* DMA commands */
  72 #define DMA_READ        0x46
  73 #define DMA_WRITE       0x4A
  74 
  75 /* FDC version return types */
  76 #define FDC_TYPE_STD    0x80    /* normal 8272A clone FDC */
  77 #define FDC_TYPE_82077  0x90    /* FIFO + perpendicular support */
  78 
  79 #endif
/* */
root/include/linux/fdreg.h

INCLUDED FROM
