1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
Under the terms of the GNU General Public License.
ktti.c is a low-level protocol driver for the KT Technology
parallel port adapter. This adapter is used in the "PHd"
portable hard-drives. As far as I can tell, this device
supports 4-bit mode _only_.
*/
#define KTTI_VERSION "1.0"
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <asm/io.h>
#include "paride.h"
#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
/* cont = 0 - access the IDE register file
cont = 1 - access the IDE command set
*/
static int cont_map[2] = { 0x10, 0x08 };
static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
{ int r;
r = regr + cont_map[cont];
w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
w0(val); w2(3); w0(0); w2(6); w2(0xb);
}
static int ktti_read_regr( PIA *pi, int cont, int regr )
{ int a, b, r;
r = regr + cont_map[cont];
w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
return j44(a,b);
}
static void ktti_read_block( PIA *pi, char * buf, int count )
{ int k, a, b;
for (k=0;k<count/2;k++) {
w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
a = r1(); w2(0xc); b = r1(); w2(9);
buf[2*k] = j44(a,b);
a = r1(); w2(0xc); b = r1(); w2(9);
buf[2*k+1] = j44(a,b);
}
}
static void ktti_write_block( PIA *pi, char * buf, int count )
{ int k;
for (k=0;k<count/2;k++) {
w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
w0(buf[2*k]); w2(3);
w0(buf[2*k+1]); w2(6);
w2(0xb);
}
}
static void ktti_connect ( PIA *pi )
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
}
static void ktti_disconnect ( PIA *pi )
{ w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
w0(pi->saved_r0);
w2(pi->saved_r2);
}
static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
{ printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
pi->device,KTTI_VERSION,pi->port,pi->delay);
}
static void ktti_init_proto( PIA *pi)
{ MOD_INC_USE_COUNT;
}
static void ktti_release_proto( PIA *pi)
{ MOD_DEC_USE_COUNT;
}
struct pi_protocol ktti = {"ktti",0,1,2,1,1,
ktti_write_regr,
ktti_read_regr,
ktti_write_block,
ktti_read_block,
ktti_connect,
ktti_disconnect,
0,
0,
0,
ktti_log_adapter,
ktti_init_proto,
ktti_release_proto
};
#ifdef MODULE
int init_module(void)
{ return pi_register( &ktti ) - 1;
}
void cleanup_module(void)
{ pi_unregister( &ktti );
}
#endif
/* end of ktti.c */
MODULE_LICENSE("GPL");
|
