| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| #ifndef _LINUX_FDREG_H |
| #define _LINUX_FDREG_H |
| /* |
| * This file contains some defines for the floppy disk controller. |
| * Various sources. Mostly "IBM Microcomputers: A Programmers |
| * Handbook", Sanches and Canton. |
| */ |
| |
| #ifdef FDPATCHES |
| #define FD_IOPORT fdc_state[fdc].address |
| #else |
| /* It would be a lot saner just to force fdc_state[fdc].address to always |
| be set ! FIXME */ |
| #define FD_IOPORT 0x3f0 |
| #endif |
| |
| /* Fd controller regs. S&C, about page 340 */ |
| #define FD_STATUS (4 + FD_IOPORT ) |
| #define FD_DATA (5 + FD_IOPORT ) |
| |
| /* Digital Output Register */ |
| #define FD_DOR (2 + FD_IOPORT ) |
| |
| /* Digital Input Register (read) */ |
| #define FD_DIR (7 + FD_IOPORT ) |
| |
| /* Diskette Control Register (write)*/ |
| #define FD_DCR (7 + FD_IOPORT ) |
| |
| /* Bits of main status register */ |
| #define STATUS_BUSYMASK 0x0F /* drive busy mask */ |
| #define STATUS_BUSY 0x10 /* FDC busy */ |
| #define STATUS_DMA 0x20 /* 0- DMA mode */ |
| #define STATUS_DIR 0x40 /* 0- cpu->fdc */ |
| #define STATUS_READY 0x80 /* Data reg ready */ |
| |
| /* Bits of FD_ST0 */ |
| #define ST0_DS 0x03 /* drive select mask */ |
| #define ST0_HA 0x04 /* Head (Address) */ |
| #define ST0_NR 0x08 /* Not Ready */ |
| #define ST0_ECE 0x10 /* Equipment check error */ |
| #define ST0_SE 0x20 /* Seek end */ |
| #define ST0_INTR 0xC0 /* Interrupt code mask */ |
| |
| /* Bits of FD_ST1 */ |
| #define ST1_MAM 0x01 /* Missing Address Mark */ |
| #define ST1_WP 0x02 /* Write Protect */ |
| #define ST1_ND 0x04 /* No Data - unreadable */ |
| #define ST1_OR 0x10 /* OverRun */ |
| #define ST1_CRC 0x20 /* CRC error in data or addr */ |
| #define ST1_EOC 0x80 /* End Of Cylinder */ |
| |
| /* Bits of FD_ST2 */ |
| #define ST2_MAM 0x01 /* Missing Address Mark (again) */ |
| #define ST2_BC 0x02 /* Bad Cylinder */ |
| #define ST2_SNS 0x04 /* Scan Not Satisfied */ |
| #define ST2_SEH 0x08 /* Scan Equal Hit */ |
| #define ST2_WC 0x10 /* Wrong Cylinder */ |
| #define ST2_CRC 0x20 /* CRC error in data field */ |
| #define ST2_CM 0x40 /* Control Mark = deleted */ |
| |
| /* Bits of FD_ST3 */ |
| #define ST3_HA 0x04 /* Head (Address) */ |
| #define ST3_DS 0x08 /* drive is double-sided */ |
| #define ST3_TZ 0x10 /* Track Zero signal (1=track 0) */ |
| #define ST3_RY 0x20 /* drive is ready */ |
| #define ST3_WP 0x40 /* Write Protect */ |
| #define ST3_FT 0x80 /* Drive Fault */ |
| |
| /* Values for FD_COMMAND */ |
| #define FD_RECALIBRATE 0x07 /* move to track 0 */ |
| #define FD_SEEK 0x0F /* seek track */ |
| #define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ |
| #define FD_WRITE 0xC5 /* write with MT, MFM */ |
| #define FD_SENSEI 0x08 /* Sense Interrupt Status */ |
| #define FD_SPECIFY 0x03 /* specify HUT etc */ |
| #define FD_FORMAT 0x4D /* format one track */ |
| #define FD_VERSION 0x10 /* get version code */ |
| #define FD_CONFIGURE 0x13 /* configure FIFO operation */ |
| #define FD_PERPENDICULAR 0x12 /* perpendicular r/w mode */ |
| #define FD_GETSTATUS 0x04 /* read ST3 */ |
| #define FD_DUMPREGS 0x0E /* dump the contents of the fdc regs */ |
| #define FD_READID 0xEA /* prints the header of a sector */ |
| #define FD_UNLOCK 0x14 /* Fifo config unlock */ |
| #define FD_LOCK 0x94 /* Fifo config lock */ |
| #define FD_RSEEK_OUT 0x8f /* seek out (i.e. to lower tracks) */ |
| #define FD_RSEEK_IN 0xcf /* seek in (i.e. to higher tracks) */ |
| |
| /* the following commands are new in the 82078. They are not used in the |
| * floppy driver, except the first three. These commands may be useful for apps |
| * which use the FDRAWCMD interface. For doc, get the 82078 spec sheets at |
| * http://www.intel.com/design/archives/periphrl/docs/29046803.htm */ |
| |
| #define FD_PARTID 0x18 /* part id ("extended" version cmd) */ |
| #define FD_SAVE 0x2e /* save fdc regs for later restore */ |
| #define FD_DRIVESPEC 0x8e /* drive specification: Access to the |
| * 2 Mbps data transfer rate for tape |
| * drives */ |
| |
| #define FD_RESTORE 0x4e /* later restore */ |
| #define FD_POWERDOWN 0x27 /* configure FDC's powersave features */ |
| #define FD_FORMAT_N_WRITE 0xef /* format and write in one go. */ |
| #define FD_OPTION 0x33 /* ISO format (which is a clean way to |
| * pack more sectors on a track) */ |
| |
| /* DMA commands */ |
| #define DMA_READ 0x46 |
| #define DMA_WRITE 0x4A |
| |
| /* FDC version return types */ |
| #define FDC_NONE 0x00 |
| #define FDC_UNKNOWN 0x10 /* DO NOT USE THIS TYPE EXCEPT IF IDENTIFICATION |
| FAILS EARLY */ |
| #define FDC_8272A 0x20 /* Intel 8272a, NEC 765 */ |
| #define FDC_765ED 0x30 /* Non-Intel 1MB-compatible FDC, can't detect */ |
| #define FDC_82072 0x40 /* Intel 82072; 8272a + FIFO + DUMPREGS */ |
| #define FDC_82072A 0x45 /* 82072A (on Sparcs) */ |
| #define FDC_82077_ORIG 0x51 /* Original version of 82077AA, sans LOCK */ |
| #define FDC_82077 0x52 /* 82077AA-1 */ |
| #define FDC_82078_UNKN 0x5f /* Unknown 82078 variant */ |
| #define FDC_82078 0x60 /* 44pin 82078 or 64pin 82078SL */ |
| #define FDC_82078_1 0x61 /* 82078-1 (2Mbps fdc) */ |
| #define FDC_S82078B 0x62 /* S82078B (first seen on Adaptec AVA-2825 VLB |
| * SCSI/EIDE/Floppy controller) */ |
| #define FDC_87306 0x63 /* National Semiconductor PC 87306 */ |
| |
| /* |
| * Beware: the fdc type list is roughly sorted by increasing features. |
| * Presence of features is tested by comparing the FDC version id with the |
| * "oldest" version that has the needed feature. |
| * If during FDC detection, an obscure test fails late in the sequence, don't |
| * assign FDC_UNKNOWN. Else the FDC will be treated as a dumb 8272a, or worse. |
| * This is especially true if the tests are unneeded. |
| */ |
| |
| #define FD_RESET_DELAY 20 |
| #endif |
