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
|
/*
backpack.c (c) 2001 Micro Solutions Inc.
Released under the terms of the GNU General Public license
backpack.c is a low-level protocol driver for the Micro Solutions
"BACKPACK" parallel port IDE adapter
(Works on Series 6 drives)
Written by: Ken Hahn (linux-dev@micro-solutions.com)
Clive Turvey (linux-dev@micro-solutions.com)
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/parport.h>
#include "pata_parport.h"
#include "ppc6lnx.c"
static int bpck6_read_regr(struct pi_adapter *pi, int cont, int reg)
{
u8 port = cont ? reg | 8 : reg;
ppc6_send_cmd(pi, port | ACCESS_PORT | ACCESS_READ);
return ppc6_rd_data_byte(pi);
}
static void bpck6_write_regr(struct pi_adapter *pi, int cont, int reg, int val)
{
u8 port = cont ? reg | 8 : reg;
ppc6_send_cmd(pi, port | ACCESS_PORT | ACCESS_WRITE);
ppc6_wr_data_byte(pi, val);
}
static void bpck6_write_block(struct pi_adapter *pi, char *buf, int len)
{
ppc6_send_cmd(pi, REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE);
ppc6_wr_data_byte(pi, (u8)len);
ppc6_wr_data_byte(pi, (u8)(len >> 8));
ppc6_wr_data_byte(pi, 0);
ppc6_send_cmd(pi, CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK);
ppc6_send_cmd(pi, ATA_REG_DATA | ACCESS_PORT | ACCESS_WRITE);
ppc6_wr_data_blk(pi, buf, len);
ppc6_send_cmd(pi, CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK);
}
static void bpck6_read_block(struct pi_adapter *pi, char *buf, int len)
{
ppc6_send_cmd(pi, REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE);
ppc6_wr_data_byte(pi, (u8)len);
ppc6_wr_data_byte(pi, (u8)(len >> 8));
ppc6_wr_data_byte(pi, 0);
ppc6_send_cmd(pi, CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK);
ppc6_send_cmd(pi, ATA_REG_DATA | ACCESS_PORT | ACCESS_READ);
switch (mode_map[pi->mode]) {
case PPCMODE_UNI_SW:
case PPCMODE_UNI_FW:
while (len) {
u8 d;
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_INIT); /* DATA STROBE */
d = parport_read_status(pi->pardev->port);
d = ((d & 0x80) >> 1) | ((d & 0x38) >> 3);
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_STROBE);
d |= parport_read_status(pi->pardev->port) & 0xB8;
*buf++ = d;
len--;
}
break;
case PPCMODE_BI_SW:
case PPCMODE_BI_FW:
parport_data_reverse(pi->pardev->port);
while (len) {
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT);
*buf++ = parport_read_data(pi->pardev->port);
len--;
}
parport_frob_control(pi->pardev->port, PARPORT_CONTROL_STROBE,
0);
parport_data_forward(pi->pardev->port);
break;
case PPCMODE_EPP_BYTE:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_8);
break;
case PPCMODE_EPP_WORD:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_16);
break;
case PPCMODE_EPP_DWORD:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_32);
break;
}
ppc6_send_cmd(pi, CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK);
}
static void bpck6_connect(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "connect\n");
ppc6_open(pi);
ppc6_wr_extout(pi, 0x3);
}
static void bpck6_disconnect(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "disconnect\n");
ppc6_wr_extout(pi, 0x0);
ppc6_deselect(pi);
}
static int bpck6_test_port(struct pi_adapter *pi) /* check for 8-bit port */
{
dev_dbg(&pi->dev, "PARPORT indicates modes=%x for lp=0x%lx\n",
pi->pardev->port->modes, pi->pardev->port->base);
/* look at the parport device to see what modes we can use */
if (pi->pardev->port->modes & PARPORT_MODE_EPP)
return 5; /* Can do EPP */
if (pi->pardev->port->modes & PARPORT_MODE_TRISTATE)
return 2;
return 1; /* Just flat SPP */
}
static int bpck6_probe_unit(struct pi_adapter *pi)
{
int out, saved_mode;
dev_dbg(&pi->dev, "PROBE UNIT %x on port:%x\n", pi->unit, pi->port);
saved_mode = pi->mode;
/*LOWER DOWN TO UNIDIRECTIONAL*/
pi->mode = 0;
out = ppc6_open(pi);
dev_dbg(&pi->dev, "ppc_open returned %2x\n", out);
if(out)
{
ppc6_deselect(pi);
dev_dbg(&pi->dev, "leaving probe\n");
pi->mode = saved_mode;
return(1);
}
else
{
dev_dbg(&pi->dev, "Failed open\n");
pi->mode = saved_mode;
return(0);
}
}
static void bpck6_log_adapter(struct pi_adapter *pi)
{
char *mode_string[5]=
{"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
dev_info(&pi->dev, "Micro Solutions BACKPACK Drive unit %d at 0x%x, mode:%d (%s), delay %d\n",
pi->unit, pi->port, pi->mode, mode_string[pi->mode], pi->delay);
}
static struct pi_protocol bpck6 = {
.owner = THIS_MODULE,
.name = "bpck6",
.max_mode = 5,
.epp_first = 2, /* 2-5 use epp (need 8 ports) */
.max_units = 255,
.write_regr = bpck6_write_regr,
.read_regr = bpck6_read_regr,
.write_block = bpck6_write_block,
.read_block = bpck6_read_block,
.connect = bpck6_connect,
.disconnect = bpck6_disconnect,
.test_port = bpck6_test_port,
.probe_unit = bpck6_probe_unit,
.log_adapter = bpck6_log_adapter,
};
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Micro Solutions Inc.");
MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
module_pata_parport_driver(bpck6);
|
