Root/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

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