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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* (c) 1998 Grant R. Guenther <grant@torque.net>
*
* fit3.c is a low-level protocol driver for newer models
* of the Fidelity International Technology parallel port adapter.
* This adapter is used in their TransDisk 3000 portable
* hard-drives, as well as CD-ROM, PD-CD and other devices.
*
* The TD-2000 and certain older devices use a different protocol.
* Try the fit2 protocol module with them.
*
* NB: The FIT adapters do not appear to support the control
* registers. So, we map ALT_STATUS to STATUS and NO-OP writes
* to the device control register - this means that IDE reset
* will not work on these devices.
*/
#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 "pata_parport.h"
#define j44(a, b) (((a >> 3) & 0x0f) | ((b << 1) & 0xf0))
#define w7(byte) out_p(7, byte)
#define r7() (in_p(7) & 0xff)
/*
* cont = 0 - access the IDE register file
* cont = 1 - access the IDE command set
*/
static void fit3_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
{
if (cont == 1)
return;
switch (pi->mode) {
case 0:
case 1:
w2(0xc); w0(regr); w2(0x8); w2(0xc);
w0(val); w2(0xd);
w0(0); w2(0xc);
break;
case 2:
w2(0xc); w0(regr); w2(0x8); w2(0xc);
w4(val); w4(0);
w2(0xc);
break;
}
}
static int fit3_read_regr(struct pi_adapter *pi, int cont, int regr)
{
int a, b;
if (cont) {
if (regr != 6)
return 0xff;
regr = 7;
}
switch (pi->mode) {
case 0:
w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
w2(0xd); a = r1();
w2(0xf); b = r1();
w2(0xc);
return j44(a, b);
case 1:
w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
w2(0xec); w2(0xee); w2(0xef); a = r0();
w2(0xc);
return a;
case 2:
w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
w2(0xec);
a = r4(); b = r4();
w2(0xc);
return a;
}
return -1;
}
static void fit3_read_block(struct pi_adapter *pi, char *buf, int count)
{
int k, a, b, c, d;
switch (pi->mode) {
case 0:
w2(0xc); w0(0x10); w2(0x8); w2(0xc);
for (k = 0; k < count / 2; k++) {
w2(0xd); a = r1();
w2(0xf); b = r1();
w2(0xc); c = r1();
w2(0xe); d = r1();
buf[2 * k] = j44(a, b);
buf[2 * k + 1] = j44(c, d);
}
w2(0xc);
break;
case 1:
w2(0xc); w0(0x90); w2(0x8); w2(0xc);
w2(0xec); w2(0xee);
for (k = 0; k < count / 2; k++) {
w2(0xef); a = r0();
w2(0xee); b = r0();
buf[2 * k] = a;
buf[2 * k + 1] = b;
}
w2(0xec);
w2(0xc);
break;
case 2:
w2(0xc); w0(0x90); w2(0x8); w2(0xc);
w2(0xec);
for (k = 0; k < count; k++)
buf[k] = r4();
w2(0xc);
break;
}
}
static void fit3_write_block(struct pi_adapter *pi, char *buf, int count)
{
int k;
switch (pi->mode) {
case 0:
case 1:
w2(0xc); w0(0); w2(0x8); w2(0xc);
for (k = 0; k < count / 2; k++) {
w0(buf[2 * k]); w2(0xd);
w0(buf[2 * k + 1]); w2(0xc);
}
break;
case 2:
w2(0xc); w0(0); w2(0x8); w2(0xc);
for (k = 0; k < count; k++)
w4(buf[k]);
w2(0xc);
break;
}
}
static void fit3_connect(struct pi_adapter *pi)
{
pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(0xc); w0(0); w2(0xa);
if (pi->mode == 2) {
w2(0xc); w0(0x9);
w2(0x8); w2(0xc);
}
}
static void fit3_disconnect(struct pi_adapter *pi)
{
w2(0xc); w0(0xa); w2(0x8); w2(0xc);
w0(pi->saved_r0);
w2(pi->saved_r2);
}
static void fit3_log_adapter(struct pi_adapter *pi)
{
char *mode_string[3] = { "4-bit", "8-bit", "EPP"};
dev_info(&pi->dev,
"FIT 3000 adapter at 0x%x, mode %d (%s), delay %d\n",
pi->port, pi->mode, mode_string[pi->mode], pi->delay);
}
static struct pi_protocol fit3 = {
.owner = THIS_MODULE,
.name = "fit3",
.max_mode = 3,
.epp_first = 2,
.default_delay = 1,
.max_units = 1,
.write_regr = fit3_write_regr,
.read_regr = fit3_read_regr,
.write_block = fit3_write_block,
.read_block = fit3_read_block,
.connect = fit3_connect,
.disconnect = fit3_disconnect,
.log_adapter = fit3_log_adapter,
};
MODULE_LICENSE("GPL");
module_pata_parport_driver(fit3);
|
