File: /usr/src/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 /* XT hard disk controller registers */
17 #define XD_DATA (xd_iobase + 0x00) /* data RW register */
18 #define XD_RESET (xd_iobase + 0x01) /* reset WO register */
19 #define XD_STATUS (xd_iobase + 0x01) /* status RO register */
20 #define XD_SELECT (xd_iobase + 0x02) /* select WO register */
21 #define XD_JUMPER (xd_iobase + 0x02) /* jumper RO register */
22 #define XD_CONTROL (xd_iobase + 0x03) /* DMAE/INTE WO register */
23 #define XD_RESERVED (xd_iobase + 0x03) /* reserved */
24
25 /* XT hard disk controller commands (incomplete list) */
26 #define CMD_TESTREADY 0x00 /* test drive ready */
27 #define CMD_RECALIBRATE 0x01 /* recalibrate drive */
28 #define CMD_SENSE 0x03 /* request sense */
29 #define CMD_FORMATDRV 0x04 /* format drive */
30 #define CMD_VERIFY 0x05 /* read verify */
31 #define CMD_FORMATTRK 0x06 /* format track */
32 #define CMD_FORMATBAD 0x07 /* format bad track */
33 #define CMD_READ 0x08 /* read */
34 #define CMD_WRITE 0x0A /* write */
35 #define CMD_SEEK 0x0B /* seek */
36
37 /* Controller specific commands */
38 #define CMD_DTCSETPARAM 0x0C /* set drive parameters (DTC 5150X & CX only?) */
39 #define CMD_DTCGETECC 0x0D /* get ecc error length (DTC 5150X only?) */
40 #define CMD_DTCREADBUF 0x0E /* read sector buffer (DTC 5150X only?) */
41 #define CMD_DTCWRITEBUF 0x0F /* write sector buffer (DTC 5150X only?) */
42 #define CMD_DTCREMAPTRK 0x11 /* assign alternate track (DTC 5150X only?) */
43 #define CMD_DTCGETPARAM 0xFB /* get drive parameters (DTC 5150X only?) */
44 #define CMD_DTCSETSTEP 0xFC /* set step rate (DTC 5150X only?) */
45 #define CMD_DTCSETGEOM 0xFE /* set geometry data (DTC 5150X only?) */
46 #define CMD_DTCGETGEOM 0xFF /* get geometry data (DTC 5150X only?) */
47 #define CMD_ST11GETGEOM 0xF8 /* get geometry data (Seagate ST11R/M only?) */
48 #define CMD_WDSETPARAM 0x0C /* set drive parameters (WD 1004A27X only?) */
49 #define CMD_XBSETPARAM 0x0C /* set drive parameters (XEBEC only?) */
50
51 /* Bits for command status byte */
52 #define CSB_ERROR 0x02 /* error */
53 #define CSB_LUN 0x20 /* logical Unit Number */
54
55 /* XT hard disk controller status bits */
56 #define STAT_READY 0x01 /* controller is ready */
57 #define STAT_INPUT 0x02 /* data flowing from controller to host */
58 #define STAT_COMMAND 0x04 /* controller in command phase */
59 #define STAT_SELECT 0x08 /* controller is selected */
60 #define STAT_REQUEST 0x10 /* controller requesting data */
61 #define STAT_INTERRUPT 0x20 /* controller requesting interrupt */
62
63 /* XT hard disk controller control bits */
64 #define PIO_MODE 0x00 /* control bits to set for PIO */
65 #define DMA_MODE 0x03 /* control bits to set for DMA & interrupt */
66
67 #define XD_MAXDRIVES 2 /* maximum 2 drives */
68 #define XD_TIMEOUT HZ /* 1 second timeout */
69 #define XD_RETRIES 4 /* maximum 4 retries */
70
71 #undef DEBUG /* define for debugging output */
72
73 #ifdef DEBUG
74 #define DEBUG_STARTUP /* debug driver initialisation */
75 #define DEBUG_OVERRIDE /* debug override geometry detection */
76 #define DEBUG_READWRITE /* debug each read/write command */
77 #define DEBUG_OTHER /* debug misc. interrupt/DMA stuff */
78 #define DEBUG_COMMAND /* debug each controller command */
79 #endif /* DEBUG */
80
81 /* this structure defines the XT drives and their types */
82 typedef struct {
83 u_char heads;
84 u_short cylinders;
85 u_char sectors;
86 u_char control;
87 } XD_INFO;
88
89 /* this structure is returned to the HDIO_GETGEO ioctl */
90 typedef struct {
91 __u8 heads;
92 __u8 sectors;
93 __u8 cylinders;
94 __u32 start;
95 } XD_GEOMETRY;
96
97 /* this structure defines a ROM BIOS signature */
98 typedef struct {
99 unsigned int offset;
100 const char *string;
101 void (*init_controller)(unsigned int address);
102 void (*init_drive)(u_char drive);
103 const char *name;
104 } XD_SIGNATURE;
105
106 #ifndef MODULE
107 static int xd_manual_geo_init (char *command);
108 #endif /* MODULE */
109 static u_char xd_detect (u_char *controller, unsigned int *address);
110 static u_char xd_initdrives (void (*init_drive)(u_char drive));
111 static void xd_geninit (void);
112
113 static int xd_open (struct inode *inode,struct file *file);
114 static void do_xd_request (request_queue_t * q);
115 static int xd_ioctl (struct inode *inode,struct file *file,unsigned int cmd,unsigned long arg);
116 static int xd_release (struct inode *inode,struct file *file);
117 static int xd_reread_partitions (kdev_t dev);
118 static int xd_readwrite (u_char operation,u_char drive,char *buffer,u_int block,u_int count);
119 static void xd_recalibrate (u_char drive);
120
121 static void xd_interrupt_handler (int irq, void *dev_id, struct pt_regs *regs);
122 static u_char xd_setup_dma (u_char opcode,u_char *buffer,u_int count);
123 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);
124 static void xd_wakeup (unsigned long unused);
125 static void xd_watchdog (unsigned long unused);
126 static inline u_char xd_waitport (u_short port,u_char flags,u_char mask,u_long timeout);
127 static u_int xd_command (u_char *command,u_char mode,u_char *indata,u_char *outdata,u_char *sense,u_long timeout);
128
129 /* card specific setup and geometry gathering code */
130 static void xd_dtc_init_controller (unsigned int address);
131 static void xd_dtc5150cx_init_drive (u_char drive);
132 static void xd_dtc_init_drive (u_char drive);
133 static void xd_wd_init_controller (unsigned int address);
134 static void xd_wd_init_drive (u_char drive);
135 static void xd_seagate_init_controller (unsigned int address);
136 static void xd_seagate_init_drive (u_char drive);
137 static void xd_omti_init_controller (unsigned int address);
138 static void xd_omti_init_drive (u_char drive);
139 static void xd_xebec_init_controller (unsigned int address);
140 static void xd_xebec_init_drive (u_char drive);
141 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);
142 static void xd_override_init_drive (u_char drive);
143
144 #endif /* _LINUX_XD_H */
145