LXR linux/drivers/block/xd.h

   1#ifndef _LINUX_XD_H
   2#define _LINUX_XD_H
   3
   4/*
   5 * This file contains the definitions for the IO ports and errors etc. for XT hard disk controllers (at least the DTC 5150X).
   6 *
   7 * Author: Pat Mackinlay, pat@it.com.au
   8 * Date: 29/09/92
   9 *
  10 * Revised: 01/01/93, ...
  11 *
  12 * Ref: DTC 5150X Controller Specification (thanks to Kevin Fowler, kevinf@agora.rain.com)
  13 * Also thanks to: Salvador Abreu, Dave Thaler, Risto Kankkunen and Wim Van Dorst.
  14 */
  15
  16#include <linux/interrupt.h>
  17
  18/* XT hard disk controller registers */
  19#define XD_DATA         (xd_iobase + 0x00)      /* data RW register */
  20#define XD_RESET        (xd_iobase + 0x01)      /* reset WO register */
  21#define XD_STATUS       (xd_iobase + 0x01)      /* status RO register */
  22#define XD_SELECT       (xd_iobase + 0x02)      /* select WO register */
  23#define XD_JUMPER       (xd_iobase + 0x02)      /* jumper RO register */
  24#define XD_CONTROL      (xd_iobase + 0x03)      /* DMAE/INTE WO register */
  25#define XD_RESERVED     (xd_iobase + 0x03)      /* reserved */
  26
  27/* XT hard disk controller commands (incomplete list) */
  28#define CMD_TESTREADY   0x00    /* test drive ready */
  29#define CMD_RECALIBRATE 0x01    /* recalibrate drive */
  30#define CMD_SENSE       0x03    /* request sense */
  31#define CMD_FORMATDRV   0x04    /* format drive */
  32#define CMD_VERIFY      0x05    /* read verify */
  33#define CMD_FORMATTRK   0x06    /* format track */
  34#define CMD_FORMATBAD   0x07    /* format bad track */
  35#define CMD_READ        0x08    /* read */
  36#define CMD_WRITE       0x0A    /* write */
  37#define CMD_SEEK        0x0B    /* seek */
  38
  39/* Controller specific commands */
  40#define CMD_DTCSETPARAM 0x0C    /* set drive parameters (DTC 5150X & CX only?) */
  41#define CMD_DTCGETECC   0x0D    /* get ecc error length (DTC 5150X only?) */
  42#define CMD_DTCREADBUF  0x0E    /* read sector buffer (DTC 5150X only?) */
  43#define CMD_DTCWRITEBUF 0x0F    /* write sector buffer (DTC 5150X only?) */
  44#define CMD_DTCREMAPTRK 0x11    /* assign alternate track (DTC 5150X only?) */
  45#define CMD_DTCGETPARAM 0xFB    /* get drive parameters (DTC 5150X only?) */
  46#define CMD_DTCSETSTEP  0xFC    /* set step rate (DTC 5150X only?) */
  47#define CMD_DTCSETGEOM  0xFE    /* set geometry data (DTC 5150X only?) */
  48#define CMD_DTCGETGEOM  0xFF    /* get geometry data (DTC 5150X only?) */
  49#define CMD_ST11GETGEOM 0xF8    /* get geometry data (Seagate ST11R/M only?) */
  50#define CMD_WDSETPARAM  0x0C    /* set drive parameters (WD 1004A27X only?) */
  51#define CMD_XBSETPARAM  0x0C    /* set drive parameters (XEBEC only?) */
  52
  53/* Bits for command status byte */
  54#define CSB_ERROR       0x02    /* error */
  55#define CSB_LUN         0x20    /* logical Unit Number */
  56
  57/* XT hard disk controller status bits */
  58#define STAT_READY      0x01    /* controller is ready */
  59#define STAT_INPUT      0x02    /* data flowing from controller to host */
  60#define STAT_COMMAND    0x04    /* controller in command phase */
  61#define STAT_SELECT     0x08    /* controller is selected */
  62#define STAT_REQUEST    0x10    /* controller requesting data */
  63#define STAT_INTERRUPT  0x20    /* controller requesting interrupt */
  64
  65/* XT hard disk controller control bits */
  66#define PIO_MODE        0x00    /* control bits to set for PIO */
  67#define DMA_MODE        0x03    /* control bits to set for DMA & interrupt */
  68
  69#define XD_MAXDRIVES    2       /* maximum 2 drives */
  70#define XD_TIMEOUT      HZ      /* 1 second timeout */
  71#define XD_RETRIES      4       /* maximum 4 retries */
  72
  73#undef DEBUG                    /* define for debugging output */
  74
  75#ifdef DEBUG
  76        #define DEBUG_STARTUP   /* debug driver initialisation */
  77        #define DEBUG_OVERRIDE  /* debug override geometry detection */
  78        #define DEBUG_READWRITE /* debug each read/write command */
  79        #define DEBUG_OTHER     /* debug misc. interrupt/DMA stuff */
  80        #define DEBUG_COMMAND   /* debug each controller command */
  81#endif /* DEBUG */
  82
  83/* this structure defines the XT drives and their types */
  84typedef struct {
  85        u_char heads;
  86        u_short cylinders;
  87        u_char sectors;
  88        u_char control;
  89        int unit;
  90} XD_INFO;
  91
  92/* this structure defines a ROM BIOS signature */
  93typedef struct {
  94        unsigned int offset;
  95        const char *string;
  96        void (*init_controller)(unsigned int address);
  97        void (*init_drive)(u_char drive);
  98        const char *name;
  99} XD_SIGNATURE;
 100
 101#ifndef MODULE
 102static int xd_manual_geo_init (char *command);
 103#endif /* MODULE */
 104static u_char xd_detect (u_char *controller, unsigned int *address);
 105static u_char xd_initdrives (void (*init_drive)(u_char drive));
 106
 107static void do_xd_request (struct request_queue * q);
 108static int xd_ioctl (struct block_device *bdev,fmode_t mode,unsigned int cmd,unsigned long arg);
 109static int xd_readwrite (u_char operation,XD_INFO *disk,char *buffer,u_int block,u_int count);
 110static void xd_recalibrate (u_char drive);
 111
 112static irqreturn_t xd_interrupt_handler(int irq, void *dev_id);
 113static u_char xd_setup_dma (u_char opcode,u_char *buffer,u_int count);
 114static 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);
 115static void xd_watchdog (unsigned long unused);
 116static inline u_char xd_waitport (u_short port,u_char flags,u_char mask,u_long timeout);
 117static u_int xd_command (u_char *command,u_char mode,u_char *indata,u_char *outdata,u_char *sense,u_long timeout);
 118
 119/* card specific setup and geometry gathering code */
 120static void xd_dtc_init_controller (unsigned int address);
 121static void xd_dtc5150cx_init_drive (u_char drive);
 122static void xd_dtc_init_drive (u_char drive);
 123static void xd_wd_init_controller (unsigned int address);
 124static void xd_wd_init_drive (u_char drive);
 125static void xd_seagate_init_controller (unsigned int address);
 126static void xd_seagate_init_drive (u_char drive);
 127static void xd_omti_init_controller (unsigned int address);
 128static void xd_omti_init_drive (u_char drive);
 129static void xd_xebec_init_controller (unsigned int address);
 130static void xd_xebec_init_drive (u_char drive);
 131static void xd_setparam (u_char command,u_char drive,u_char heads,u_short cylinders,u_short rwrite,u_short wprecomp,u_char ecc);
 132static void xd_override_init_drive (u_char drive);
 133
 134#endif /* _LINUX_XD_H */
 135