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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)
This commit is contained in:
Jens Axboe 2013-02-14 16:29:34 +01:00
parent e5e9fdaad4 d1a6f4f197
commit ec8edc764e
4 changed files with 0 additions and 1271 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/block/Kconfig
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@ -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

1
drivers/block/Makefile
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@ -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

1123
drivers/block/xd.c
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File diff suppressed because it is too large Load Diff

134
drivers/block/xd.h
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@ -1,134 +0,0 @@
#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 */