#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/* 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 )#else#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)*/#endif/* 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-techdoc.intel.com/docs/periph/fd_contr/datasheets/ */#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