| #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. |
| */ |
| |
| /* Fd controller regs. S&C, about page 340 */ |
| #define FD_STATUS 0x3f4 |
| #define FD_DATA 0x3f5 |
| #define FD_DOR 0x3f2 /* Digital Output Register */ |
| #define FD_DIR 0x3f7 /* Digital Input Register (read) */ |
| #define FD_DCR 0x3f7 /* Diskette Control Register (write)*/ |
| |
| /* 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 chech 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 Addess 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_TZ 0x10 /* Track Zero signal (1=track 0) */ |
| #define ST3_WP 0x40 /* Write Protect */ |
| |
| /* 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 */ |
| |
| /* DMA commands */ |
| #define DMA_READ 0x46 |
| #define DMA_WRITE 0x4A |
| |
| /* FDC version return types */ |
| #define FDC_TYPE_STD 0x80 /* normal 8272A clone FDC */ |
| #define FDC_TYPE_82077 0x90 /* FIFO + perpendicular support */ |
| |
| #endif |
