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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_FDREG_H |
| 2 | #define _LINUX_FDREG_H |
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| 3 | /* |
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| 4 | * This file contains some defines for the floppy disk controller. |
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| 5 | * Various sources. Mostly "IBM Microcomputers: A Programmers |
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| 6 | * Handbook", Sanches and Canton. |
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| 7 | */ |
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| 8 | |||
| 9 | #ifdef FDPATCHES |
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| 10 | #define FD_IOPORT fdc_state[fdc].address |
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| 11 | #else |
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| 12 | /* It would be a lot saner just to force fdc_state[fdc].address to always |
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| 13 | be set ! FIXME */ |
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| 14 | #define FD_IOPORT 0x3f0 |
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| 15 | #endif |
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| 16 | |||
| 17 | /* Fd controller regs. S&C, about page 340 */ |
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| 18 | #define FD_STATUS (4 + FD_IOPORT ) |
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| 19 | #define FD_DATA (5 + FD_IOPORT ) |
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| 20 | |||
| 21 | /* Digital Output Register */ |
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| 22 | #define FD_DOR (2 + FD_IOPORT ) |
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| 23 | |||
| 24 | /* Digital Input Register (read) */ |
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| 25 | #define FD_DIR (7 + FD_IOPORT ) |
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| 26 | |||
| 27 | /* Diskette Control Register (write)*/ |
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| 28 | #define FD_DCR (7 + FD_IOPORT ) |
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| 29 | |||
| 30 | /* Bits of main status register */ |
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| 31 | #define STATUS_BUSYMASK 0x0F /* drive busy mask */ |
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| 32 | #define STATUS_BUSY 0x10 /* FDC busy */ |
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| 33 | #define STATUS_DMA 0x20 /* 0- DMA mode */ |
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| 34 | #define STATUS_DIR 0x40 /* 0- cpu->fdc */ |
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| 35 | #define STATUS_READY 0x80 /* Data reg ready */ |
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| 36 | |||
| 37 | /* Bits of FD_ST0 */ |
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| 38 | #define ST0_DS 0x03 /* drive select mask */ |
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| 39 | #define ST0_HA 0x04 /* Head (Address) */ |
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| 40 | #define ST0_NR 0x08 /* Not Ready */ |
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| 41 | #define ST0_ECE 0x10 /* Equipment check error */ |
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| 42 | #define ST0_SE 0x20 /* Seek end */ |
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| 43 | #define ST0_INTR 0xC0 /* Interrupt code mask */ |
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| 44 | |||
| 45 | /* Bits of FD_ST1 */ |
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| 46 | #define ST1_MAM 0x01 /* Missing Address Mark */ |
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| 47 | #define ST1_WP 0x02 /* Write Protect */ |
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| 48 | #define ST1_ND 0x04 /* No Data - unreadable */ |
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| 49 | #define ST1_OR 0x10 /* OverRun */ |
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| 50 | #define ST1_CRC 0x20 /* CRC error in data or addr */ |
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| 51 | #define ST1_EOC 0x80 /* End Of Cylinder */ |
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| 52 | |||
| 53 | /* Bits of FD_ST2 */ |
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| 54 | #define ST2_MAM 0x01 /* Missing Address Mark (again) */ |
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| 55 | #define ST2_BC 0x02 /* Bad Cylinder */ |
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| 56 | #define ST2_SNS 0x04 /* Scan Not Satisfied */ |
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| 57 | #define ST2_SEH 0x08 /* Scan Equal Hit */ |
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| 58 | #define ST2_WC 0x10 /* Wrong Cylinder */ |
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| 59 | #define ST2_CRC 0x20 /* CRC error in data field */ |
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| 60 | #define ST2_CM 0x40 /* Control Mark = deleted */ |
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| 61 | |||
| 62 | /* Bits of FD_ST3 */ |
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| 63 | #define ST3_HA 0x04 /* Head (Address) */ |
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| 64 | #define ST3_DS 0x08 /* drive is double-sided */ |
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| 65 | #define ST3_TZ 0x10 /* Track Zero signal (1=track 0) */ |
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| 66 | #define ST3_RY 0x20 /* drive is ready */ |
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| 67 | #define ST3_WP 0x40 /* Write Protect */ |
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| 68 | #define ST3_FT 0x80 /* Drive Fault */ |
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| 69 | |||
| 70 | /* Values for FD_COMMAND */ |
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| 71 | #define FD_RECALIBRATE 0x07 /* move to track 0 */ |
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| 72 | #define FD_SEEK 0x0F /* seek track */ |
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| 73 | #define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ |
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| 74 | #define FD_WRITE 0xC5 /* write with MT, MFM */ |
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| 75 | #define FD_SENSEI 0x08 /* Sense Interrupt Status */ |
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| 76 | #define FD_SPECIFY 0x03 /* specify HUT etc */ |
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| 77 | #define FD_FORMAT 0x4D /* format one track */ |
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| 78 | #define FD_VERSION 0x10 /* get version code */ |
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| 79 | #define FD_CONFIGURE 0x13 /* configure FIFO operation */ |
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| 80 | #define FD_PERPENDICULAR 0x12 /* perpendicular r/w mode */ |
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| 81 | #define FD_GETSTATUS 0x04 /* read ST3 */ |
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| 82 | #define FD_DUMPREGS 0x0E /* dump the contents of the fdc regs */ |
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| 83 | #define FD_READID 0xEA /* prints the header of a sector */ |
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| 84 | #define FD_UNLOCK 0x14 /* Fifo config unlock */ |
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| 85 | #define FD_LOCK 0x94 /* Fifo config lock */ |
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| 86 | #define FD_RSEEK_OUT 0x8f /* seek out (i.e. to lower tracks) */ |
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| 87 | #define FD_RSEEK_IN 0xcf /* seek in (i.e. to higher tracks) */ |
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| 88 | |||
| 89 | /* the following commands are new in the 82078. They are not used in the |
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| 90 | * floppy driver, except the first three. These commands may be useful for apps |
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| 91 | * which use the FDRAWCMD interface. For doc, get the 82078 spec sheets at |
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| 92 | * http://www-techdoc.intel.com/docs/periph/fd_contr/datasheets/ */ |
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| 93 | |||
| 94 | #define FD_PARTID 0x18 /* part id ("extended" version cmd) */ |
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| 95 | #define FD_SAVE 0x2e /* save fdc regs for later restore */ |
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| 96 | #define FD_DRIVESPEC 0x8e /* drive specification: Access to the |
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| 97 | * 2 Mbps data transfer rate for tape |
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| 98 | * drives */ |
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| 99 | |||
| 100 | #define FD_RESTORE 0x4e /* later restore */ |
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| 101 | #define FD_POWERDOWN 0x27 /* configure FDC's powersave features */ |
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| 102 | #define FD_FORMAT_N_WRITE 0xef /* format and write in one go. */ |
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| 103 | #define FD_OPTION 0x33 /* ISO format (which is a clean way to |
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| 104 | * pack more sectors on a track) */ |
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| 105 | |||
| 106 | /* DMA commands */ |
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| 107 | #define DMA_READ 0x46 |
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| 108 | #define DMA_WRITE 0x4A |
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| 109 | |||
| 110 | /* FDC version return types */ |
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| 111 | #define FDC_NONE 0x00 |
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| 112 | #define FDC_UNKNOWN 0x10 /* DO NOT USE THIS TYPE EXCEPT IF IDENTIFICATION |
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| 113 | FAILS EARLY */ |
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| 114 | #define FDC_8272A 0x20 /* Intel 8272a, NEC 765 */ |
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| 115 | #define FDC_765ED 0x30 /* Non-Intel 1MB-compatible FDC, can't detect */ |
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| 116 | #define FDC_82072 0x40 /* Intel 82072; 8272a + FIFO + DUMPREGS */ |
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| 117 | #define FDC_82072A 0x45 /* 82072A (on Sparcs) */ |
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| 118 | #define FDC_82077_ORIG 0x51 /* Original version of 82077AA, sans LOCK */ |
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| 119 | #define FDC_82077 0x52 /* 82077AA-1 */ |
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| 120 | #define FDC_82078_UNKN 0x5f /* Unknown 82078 variant */ |
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| 121 | #define FDC_82078 0x60 /* 44pin 82078 or 64pin 82078SL */ |
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| 122 | #define FDC_82078_1 0x61 /* 82078-1 (2Mbps fdc) */ |
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| 123 | #define FDC_S82078B 0x62 /* S82078B (first seen on Adaptec AVA-2825 VLB |
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| 124 | * SCSI/EIDE/Floppy controller) */ |
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| 125 | #define FDC_87306 0x63 /* National Semiconductor PC 87306 */ |
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| 126 | |||
| 127 | /* |
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| 128 | * Beware: the fdc type list is roughly sorted by increasing features. |
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| 129 | * Presence of features is tested by comparing the FDC version id with the |
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| 130 | * "oldest" version that has the needed feature. |
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| 131 | * If during FDC detection, an obscure test fails late in the sequence, don't |
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| 132 | * assign FDC_UNKNOWN. Else the FDC will be treated as a dumb 8272a, or worse. |
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| 133 | * This is especially true if the tests are unneeded. |
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| 134 | */ |
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| 135 | |||
| 136 | #define FD_RESET_DELAY 20 |
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| 137 | #endif |