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Commit ec8edc76 authored by Jens Axboe's avatar Jens Axboe
Browse files

Merge branch 'delete-xt-disk' of... 

Merge branch 'delete-xt-disk' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux into for-3.9/drivers

Paul writes:

Please pull the following to get the removal of the original IBM PC-XT
hard disk driver from the block layer (drivers/block/xd.c).

As near as I can tell, it hasn't seen a run time fix in over a dozen
years, and with drive sizes of 10-20MB, and performance of about 128kB/s
maximum, it is no surprise that it has been completely unused for well
over a decade.

The removal was originally posted[1] well over a month ago, and since
then, there has been nobody objecting to the removal, aside from someone
who had mistakenly confused it with a completely different driver (hd.c)
parents e5e9fdaa d1a6f4f1

drivers/block/Kconfig

+0 −13
Original line number Diff line number Diff line
@@ -63,19 +63,6 @@ config AMIGA_Z2RAM 
	  To compile this driver as a module, choose M here: the

	  module will be called z2ram.



config BLK_DEV_XD

	tristate "XT hard disk support"

	depends on ISA && ISA_DMA_API

	select CHECK_SIGNATURE

	help

	  Very old 8 bit hard disk controllers used in the IBM XT computer

	  will be supported if you say Y here.



	  To compile this driver as a module, choose M here: the

	  module will be called xd.



	  It's pretty unlikely that you have one of these: say N.



config GDROM

	tristate "SEGA Dreamcast GD-ROM drive"

	depends on SH_DREAMCAST

drivers/block/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o 
obj-$(CONFIG_AMIGA_Z2RAM)	+= z2ram.o

obj-$(CONFIG_BLK_DEV_RAM)	+= brd.o

obj-$(CONFIG_BLK_DEV_LOOP)	+= loop.o

obj-$(CONFIG_BLK_DEV_XD)	+= xd.o

obj-$(CONFIG_BLK_CPQ_DA)	+= cpqarray.o

obj-$(CONFIG_BLK_CPQ_CISS_DA)  += cciss.o

obj-$(CONFIG_BLK_DEV_DAC960)	+= DAC960.o

drivers/block/xd.c

deleted100644 → 0
+0 −1123

File deleted.

Preview size limit exceeded, changes collapsed.

drivers/block/xd.h

deleted100644 → 0
+0 −134
Original line number Diff line number Diff line 
#ifndef _LINUX_XD_H

#define _LINUX_XD_H



/*

 * This file contains the definitions for the IO ports and errors etc. for XT hard disk controllers (at least the DTC 5150X).

 *

 * Author: Pat Mackinlay, pat@it.com.au

 * Date: 29/09/92

 *

 * Revised: 01/01/93, ...

 *

 * Ref: DTC 5150X Controller Specification (thanks to Kevin Fowler, kevinf@agora.rain.com)

 * Also thanks to: Salvador Abreu, Dave Thaler, Risto Kankkunen and Wim Van Dorst.

 */



#include <linux/interrupt.h>



/* XT hard disk controller registers */

#define XD_DATA		(xd_iobase + 0x00)	/* data RW register */

#define XD_RESET	(xd_iobase + 0x01)	/* reset WO register */

#define XD_STATUS	(xd_iobase + 0x01)	/* status RO register */

#define XD_SELECT	(xd_iobase + 0x02)	/* select WO register */

#define XD_JUMPER	(xd_iobase + 0x02)	/* jumper RO register */

#define XD_CONTROL	(xd_iobase + 0x03)	/* DMAE/INTE WO register */

#define XD_RESERVED	(xd_iobase + 0x03)	/* reserved */



/* XT hard disk controller commands (incomplete list) */

#define CMD_TESTREADY	0x00	/* test drive ready */

#define CMD_RECALIBRATE	0x01	/* recalibrate drive */

#define CMD_SENSE	0x03	/* request sense */

#define CMD_FORMATDRV	0x04	/* format drive */

#define CMD_VERIFY	0x05	/* read verify */

#define CMD_FORMATTRK	0x06	/* format track */

#define CMD_FORMATBAD	0x07	/* format bad track */

#define CMD_READ	0x08	/* read */

#define CMD_WRITE	0x0A	/* write */

#define CMD_SEEK	0x0B	/* seek */



/* Controller specific commands */

#define CMD_DTCSETPARAM	0x0C	/* set drive parameters (DTC 5150X & CX only?) */

#define CMD_DTCGETECC	0x0D	/* get ecc error length (DTC 5150X only?) */

#define CMD_DTCREADBUF	0x0E	/* read sector buffer (DTC 5150X only?) */

#define CMD_DTCWRITEBUF 0x0F	/* write sector buffer (DTC 5150X only?) */

#define CMD_DTCREMAPTRK	0x11	/* assign alternate track (DTC 5150X only?) */

#define CMD_DTCGETPARAM	0xFB	/* get drive parameters (DTC 5150X only?) */

#define CMD_DTCSETSTEP	0xFC	/* set step rate (DTC 5150X only?) */

#define CMD_DTCSETGEOM	0xFE	/* set geometry data (DTC 5150X only?) */

#define CMD_DTCGETGEOM	0xFF	/* get geometry data (DTC 5150X only?) */

#define CMD_ST11GETGEOM 0xF8	/* get geometry data (Seagate ST11R/M only?) */

#define CMD_WDSETPARAM	0x0C	/* set drive parameters (WD 1004A27X only?) */

#define CMD_XBSETPARAM	0x0C	/* set drive parameters (XEBEC only?) */



/* Bits for command status byte */

#define CSB_ERROR	0x02	/* error */

#define CSB_LUN		0x20	/* logical Unit Number */



/* XT hard disk controller status bits */

#define STAT_READY	0x01	/* controller is ready */

#define STAT_INPUT	0x02	/* data flowing from controller to host */

#define STAT_COMMAND	0x04	/* controller in command phase */

#define STAT_SELECT	0x08	/* controller is selected */

#define STAT_REQUEST	0x10	/* controller requesting data */

#define STAT_INTERRUPT	0x20	/* controller requesting interrupt */



/* XT hard disk controller control bits */

#define PIO_MODE	0x00	/* control bits to set for PIO */

#define DMA_MODE	0x03	/* control bits to set for DMA & interrupt */



#define XD_MAXDRIVES	2	/* maximum 2 drives */

#define XD_TIMEOUT	HZ	/* 1 second timeout */

#define XD_RETRIES	4	/* maximum 4 retries */



#undef DEBUG			/* define for debugging output */



#ifdef DEBUG

	#define DEBUG_STARTUP	/* debug driver initialisation */

	#define DEBUG_OVERRIDE	/* debug override geometry detection */

	#define DEBUG_READWRITE	/* debug each read/write command */

	#define DEBUG_OTHER	/* debug misc. interrupt/DMA stuff */

	#define DEBUG_COMMAND	/* debug each controller command */

#endif /* DEBUG */



/* this structure defines the XT drives and their types */

typedef struct {

	u_char heads;

	u_short cylinders;

	u_char sectors;

	u_char control;

	int unit;

} XD_INFO;



/* this structure defines a ROM BIOS signature */

typedef struct {

	unsigned int offset;

	const char *string;

	void (*init_controller)(unsigned int address);

	void (*init_drive)(u_char drive);

	const char *name;

} XD_SIGNATURE;



#ifndef MODULE

static int xd_manual_geo_init (char *command);

#endif /* MODULE */

static u_char xd_detect (u_char *controller, unsigned int *address);

static u_char xd_initdrives (void (*init_drive)(u_char drive));



static void do_xd_request (struct request_queue * q);

static int xd_ioctl (struct block_device *bdev,fmode_t mode,unsigned int cmd,unsigned long arg);

static int xd_readwrite (u_char operation,XD_INFO *disk,char *buffer,u_int block,u_int count);

static void xd_recalibrate (u_char drive);



static irqreturn_t xd_interrupt_handler(int irq, void *dev_id);

static u_char xd_setup_dma (u_char opcode,u_char *buffer,u_int count);

static u_char *xd_build (u_char *cmdblk,u_char command,u_char drive,u_char head,u_short cylinder,u_char sector,u_char count,u_char control);

static void xd_watchdog (unsigned long unused);

static inline u_char xd_waitport (u_short port,u_char flags,u_char mask,u_long timeout);

static u_int xd_command (u_char *command,u_char mode,u_char *indata,u_char *outdata,u_char *sense,u_long timeout);



/* card specific setup and geometry gathering code */

static void xd_dtc_init_controller (unsigned int address);

static void xd_dtc5150cx_init_drive (u_char drive);

static void xd_dtc_init_drive (u_char drive);

static void xd_wd_init_controller (unsigned int address);

static void xd_wd_init_drive (u_char drive);

static void xd_seagate_init_controller (unsigned int address);

static void xd_seagate_init_drive (u_char drive);

static void xd_omti_init_controller (unsigned int address);

static void xd_omti_init_drive (u_char drive);

static void xd_xebec_init_controller (unsigned int address);

static void xd_xebec_init_drive (u_char drive);

static void xd_setparam (u_char command,u_char drive,u_char heads,u_short cylinders,u_short rwrite,u_short wprecomp,u_char ecc);

static void xd_override_init_drive (u_char drive);



#endif /* _LINUX_XD_H */