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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
comm.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
Under the terms of the GNU General Public License.
comm.c is a low-level protocol driver for some older models
of the DataStor "Commuter" parallel to IDE adapter. Some of
the parallel port devices marketed by Arista currently
use this adapter.
*/
/* Changes:
1.01 GRG 1998.05.05 init_proto, release_proto
*/
#define COMM_VERSION "1.01"
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <asm/io.h>
#include "paride.h"
/* mode codes: 0 nybble reads, 8-bit writes
1 8-bit reads and writes
2 8-bit EPP mode
*/
#define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
#define P1 w2(5);w2(0xd);w2(0xd);w2(5);w2(4);
#define P2 w2(5);w2(7);w2(7);w2(5);w2(4);
/* cont = 0 - access the IDE register file
cont = 1 - access the IDE command set
*/
static int cont_map[2] = { 0x08, 0x10 };
static int comm_read_regr( PIA *pi, int cont, int regr )
{ int l, h, r;
r = regr + cont_map[cont];
switch (pi->mode) {
case 0: w0(r); P1; w0(0);
w2(6); l = r1(); w0(0x80); h = r1(); w2(4);
return j44(l,h);
case 1: w0(r+0x20); P1;
w0(0); w2(0x26); h = r0(); w2(4);
return h;
case 2:
case 3:
case 4: w3(r+0x20); (void)r1();
w2(0x24); h = r4(); w2(4);
return h;
}
return -1;
}
static void comm_write_regr( PIA *pi, int cont, int regr, int val )
{ int r;
r = regr + cont_map[cont];
switch (pi->mode) {
case 0:
case 1: w0(r); P1; w0(val); P2;
break;
case 2:
case 3:
case 4: w3(r); (void)r1(); w4(val);
break;
}
}
static void comm_connect ( PIA *pi )
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(4); w0(0xff); w2(6);
w2(4); w0(0xaa); w2(6);
w2(4); w0(0x00); w2(6);
w2(4); w0(0x87); w2(6);
w2(4); w0(0xe0); w2(0xc); w2(0xc); w2(4);
}
static void comm_disconnect ( PIA *pi )
{ w2(0); w2(0); w2(0); w2(4);
w0(pi->saved_r0);
w2(pi->saved_r2);
}
static void comm_read_block( PIA *pi, char * buf, int count )
{ int i, l, h;
switch (pi->mode) {
case 0: w0(0x48); P1;
for(i=0;i<count;i++) {
w0(0); w2(6); l = r1();
w0(0x80); h = r1(); w2(4);
buf[i] = j44(l,h);
}
break;
case 1: w0(0x68); P1; w0(0);
for(i=0;i<count;i++) {
w2(0x26); buf[i] = r0(); w2(0x24);
}
w2(4);
break;
case 2: w3(0x68); (void)r1(); w2(0x24);
for (i=0;i<count;i++) buf[i] = r4();
w2(4);
break;
case 3: w3(0x68); (void)r1(); w2(0x24);
for (i=0;i<count/2;i++) ((u16 *)buf)[i] = r4w();
w2(4);
break;
case 4: w3(0x68); (void)r1(); w2(0x24);
for (i=0;i<count/4;i++) ((u32 *)buf)[i] = r4l();
w2(4);
break;
}
}
/* NB: Watch out for the byte swapped writes ! */
static void comm_write_block( PIA *pi, char * buf, int count )
{ int k;
switch (pi->mode) {
case 0:
case 1: w0(0x68); P1;
for (k=0;k<count;k++) {
w2(5); w0(buf[k^1]); w2(7);
}
w2(5); w2(4);
break;
case 2: w3(0x48); (void)r1();
for (k=0;k<count;k++) w4(buf[k^1]);
break;
case 3: w3(0x48); (void)r1();
for (k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
break;
case 4: w3(0x48); (void)r1();
for (k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
break;
}
}
static void comm_log_adapter( PIA *pi, char * scratch, int verbose )
{ char *mode_string[5] = {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
printk("%s: comm %s, DataStor Commuter at 0x%x, ",
pi->device,COMM_VERSION,pi->port);
printk("mode %d (%s), delay %d\n",pi->mode,
mode_string[pi->mode],pi->delay);
}
static struct pi_protocol comm = {
.owner = THIS_MODULE,
.name = "comm",
.max_mode = 5,
.epp_first = 2,
.default_delay = 1,
.max_units = 1,
.write_regr = comm_write_regr,
.read_regr = comm_read_regr,
.write_block = comm_write_block,
.read_block = comm_read_block,
.connect = comm_connect,
.disconnect = comm_disconnect,
.log_adapter = comm_log_adapter,
};
static int __init comm_init(void)
{
return paride_register(&comm);
}
static void __exit comm_exit(void)
{
paride_unregister(&comm);
}
MODULE_LICENSE("GPL");
module_init(comm_init)
module_exit(comm_exit)
|
