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001: #ifndef _LINUX_FDREG_H 002: #define _LINUX_FDREG_H 003: /* 004: * This file contains some defines for the floppy disk controller. 005: * Various sources. Mostly "IBM Microcomputers: A Programmers 006: * Handbook", Sanches and Canton. 007: */ 008: 009: #ifdef FDPATCHES 010: #define FD_IOPORT fdc_state[fdc].address 011: #else 012: /* It would be a lot saner just to force fdc_state[fdc].address to always 013: be set ! FIXME */ 014: #define FD_IOPORT 0x3f0 015: #endif 016: 017: /* Fd controller regs. S&C, about page 340 */ 018: #define FD_STATUS (4 + FD_IOPORT ) 019: #define FD_DATA (5 + FD_IOPORT ) 020: 021: /* Digital Output Register */ 022: #define FD_DOR (2 + FD_IOPORT ) 023: 024: /* Digital Input Register (read) */ 025: #define FD_DIR (7 + FD_IOPORT ) 026: 027: /* Diskette Control Register (write)*/ 028: #define FD_DCR (7 + FD_IOPORT ) 029: 030: /* Bits of main status register */ 031: #define STATUS_BUSYMASK 0x0F /* drive busy mask */ 032: #define STATUS_BUSY 0x10 /* FDC busy */ 033: #define STATUS_DMA 0x20 /* 0- DMA mode */ 034: #define STATUS_DIR 0x40 /* 0- cpu->fdc */ 035: #define STATUS_READY 0x80 /* Data reg ready */ 036: 037: /* Bits of FD_ST0 */ 038: #define ST0_DS 0x03 /* drive select mask */ 039: #define ST0_HA 0x04 /* Head (Address) */ 040: #define ST0_NR 0x08 /* Not Ready */ 041: #define ST0_ECE 0x10 /* Equipment check error */ 042: #define ST0_SE 0x20 /* Seek end */ 043: #define ST0_INTR 0xC0 /* Interrupt code mask */ 044: 045: /* Bits of FD_ST1 */ 046: #define ST1_MAM 0x01 /* Missing Address Mark */ 047: #define ST1_WP 0x02 /* Write Protect */ 048: #define ST1_ND 0x04 /* No Data - unreadable */ 049: #define ST1_OR 0x10 /* OverRun */ 050: #define ST1_CRC 0x20 /* CRC error in data or addr */ 051: #define ST1_EOC 0x80 /* End Of Cylinder */ 052: 053: /* Bits of FD_ST2 */ 054: #define ST2_MAM 0x01 /* Missing Address Mark (again) */ 055: #define ST2_BC 0x02 /* Bad Cylinder */ 056: #define ST2_SNS 0x04 /* Scan Not Satisfied */ 057: #define ST2_SEH 0x08 /* Scan Equal Hit */ 058: #define ST2_WC 0x10 /* Wrong Cylinder */ 059: #define ST2_CRC 0x20 /* CRC error in data field */ 060: #define ST2_CM 0x40 /* Control Mark = deleted */ 061: 062: /* Bits of FD_ST3 */ 063: #define ST3_HA 0x04 /* Head (Address) */ 064: #define ST3_DS 0x08 /* drive is double-sided */ 065: #define ST3_TZ 0x10 /* Track Zero signal (1=track 0) */ 066: #define ST3_RY 0x20 /* drive is ready */ 067: #define ST3_WP 0x40 /* Write Protect */ 068: #define ST3_FT 0x80 /* Drive Fault */ 069: 070: /* Values for FD_COMMAND */ 071: #define FD_RECALIBRATE 0x07 /* move to track 0 */ 072: #define FD_SEEK 0x0F /* seek track */ 073: #define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ 074: #define FD_WRITE 0xC5 /* write with MT, MFM */ 075: #define FD_SENSEI 0x08 /* Sense Interrupt Status */ 076: #define FD_SPECIFY 0x03 /* specify HUT etc */ 077: #define FD_FORMAT 0x4D /* format one track */ 078: #define FD_VERSION 0x10 /* get version code */ 079: #define FD_CONFIGURE 0x13 /* configure FIFO operation */ 080: #define FD_PERPENDICULAR 0x12 /* perpendicular r/w mode */ 081: #define FD_GETSTATUS 0x04 /* read ST3 */ 082: #define FD_DUMPREGS 0x0E /* dump the contents of the fdc regs */ 083: #define FD_READID 0xEA /* prints the header of a sector */ 084: #define FD_UNLOCK 0x14 /* Fifo config unlock */ 085: #define FD_LOCK 0x94 /* Fifo config lock */ 086: #define FD_RSEEK_OUT 0x8f /* seek out (i.e. to lower tracks) */ 087: #define FD_RSEEK_IN 0xcf /* seek in (i.e. to higher tracks) */ 088: 089: /* the following commands are new in the 82078. They are not used in the 090: * floppy driver, except the first three. These commands may be useful for apps 091: * which use the FDRAWCMD interface. For doc, get the 82078 spec sheets at 092: * http://www.intel.com/design/archives/periphrl/docs/29046803.htm */ 093: 094: #define FD_PARTID 0x18 /* part id ("extended" version cmd) */ 095: #define FD_SAVE 0x2e /* save fdc regs for later restore */ 096: #define FD_DRIVESPEC 0x8e /* drive specification: Access to the 097: * 2 Mbps data transfer rate for tape 098: * drives */ 099: 100: #define FD_RESTORE 0x4e /* later restore */ 101: #define FD_POWERDOWN 0x27 /* configure FDC's powersave features */ 102: #define FD_FORMAT_N_WRITE 0xef /* format and write in one go. */ 103: #define FD_OPTION 0x33 /* ISO format (which is a clean way to 104: * pack more sectors on a track) */ 105: 106: /* DMA commands */ 107: #define DMA_READ 0x46 108: #define DMA_WRITE 0x4A 109: 110: /* FDC version return types */ 111: #define FDC_NONE 0x00 112: #define FDC_UNKNOWN 0x10 /* DO NOT USE THIS TYPE EXCEPT IF IDENTIFICATION 113: FAILS EARLY */ 114: #define FDC_8272A 0x20 /* Intel 8272a, NEC 765 */ 115: #define FDC_765ED 0x30 /* Non-Intel 1MB-compatible FDC, can't detect */ 116: #define FDC_82072 0x40 /* Intel 82072; 8272a + FIFO + DUMPREGS */ 117: #define FDC_82072A 0x45 /* 82072A (on Sparcs) */ 118: #define FDC_82077_ORIG 0x51 /* Original version of 82077AA, sans LOCK */ 119: #define FDC_82077 0x52 /* 82077AA-1 */ 120: #define FDC_82078_UNKN 0x5f /* Unknown 82078 variant */ 121: #define FDC_82078 0x60 /* 44pin 82078 or 64pin 82078SL */ 122: #define FDC_82078_1 0x61 /* 82078-1 (2Mbps fdc) */ 123: #define FDC_S82078B 0x62 /* S82078B (first seen on Adaptec AVA-2825 VLB 124: * SCSI/EIDE/Floppy controller) */ 125: #define FDC_87306 0x63 /* National Semiconductor PC 87306 */ 126: 127: /* 128: * Beware: the fdc type list is roughly sorted by increasing features. 129: * Presence of features is tested by comparing the FDC version id with the 130: * "oldest" version that has the needed feature. 131: * If during FDC detection, an obscure test fails late in the sequence, don't 132: * assign FDC_UNKNOWN. Else the FDC will be treated as a dumb 8272a, or worse. 133: * This is especially true if the tests are unneeded. 134: */ 135: 136: #define FD_RESET_DELAY 20 137: #endif 138: