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18#define ATEN_VERSION "1.01"
19
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/delay.h>
23#include <linux/kernel.h>
24#include <linux/wait.h>
25#include <linux/types.h>
26#include <asm/io.h>
27
28#include "paride.h"
29
30#define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
31
32
33
34
35
36static int cont_map[2] = { 0x08, 0x20 };
37
38static void aten_write_regr( PIA *pi, int cont, int regr, int val)
39
40{ int r;
41
42 r = regr + cont_map[cont] + 0x80;
43
44 w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc);
45}
46
47static int aten_read_regr( PIA *pi, int cont, int regr )
48
49{ int a, b, r;
50
51 r = regr + cont_map[cont] + 0x40;
52
53 switch (pi->mode) {
54
55 case 0: w0(r); w2(0xe); w2(6);
56 w2(7); w2(6); w2(0);
57 a = r1(); w0(0x10); b = r1(); w2(0xc);
58 return j44(a,b);
59
60 case 1: r |= 0x10;
61 w0(r); w2(0xe); w2(6); w0(0xff);
62 w2(0x27); w2(0x26); w2(0x20);
63 a = r0();
64 w2(0x26); w2(0xc);
65 return a;
66 }
67 return -1;
68}
69
70static void aten_read_block( PIA *pi, char * buf, int count )
71
72{ int k, a, b, c, d;
73
74 switch (pi->mode) {
75
76 case 0: w0(0x48); w2(0xe); w2(6);
77 for (k=0;k<count/2;k++) {
78 w2(7); w2(6); w2(2);
79 a = r1(); w0(0x58); b = r1();
80 w2(0); d = r1(); w0(0x48); c = r1();
81 buf[2*k] = j44(c,d);
82 buf[2*k+1] = j44(a,b);
83 }
84 w2(0xc);
85 break;
86
87 case 1: w0(0x58); w2(0xe); w2(6);
88 for (k=0;k<count/2;k++) {
89 w2(0x27); w2(0x26); w2(0x22);
90 a = r0(); w2(0x20); b = r0();
91 buf[2*k] = b; buf[2*k+1] = a;
92 }
93 w2(0x26); w2(0xc);
94 break;
95 }
96}
97
98static void aten_write_block( PIA *pi, char * buf, int count )
99
100{ int k;
101
102 w0(0x88); w2(0xe); w2(6);
103 for (k=0;k<count/2;k++) {
104 w0(buf[2*k+1]); w2(0xe); w2(6);
105 w0(buf[2*k]); w2(7); w2(6);
106 }
107 w2(0xc);
108}
109
110static void aten_connect ( PIA *pi )
111
112{ pi->saved_r0 = r0();
113 pi->saved_r2 = r2();
114 w2(0xc);
115}
116
117static void aten_disconnect ( PIA *pi )
118
119{ w0(pi->saved_r0);
120 w2(pi->saved_r2);
121}
122
123static void aten_log_adapter( PIA *pi, char * scratch, int verbose )
124
125{ char *mode_string[2] = {"4-bit","8-bit"};
126
127 printk("%s: aten %s, ATEN EH-100 at 0x%x, ",
128 pi->device,ATEN_VERSION,pi->port);
129 printk("mode %d (%s), delay %d\n",pi->mode,
130 mode_string[pi->mode],pi->delay);
131
132}
133
134static struct pi_protocol aten = {
135 .owner = THIS_MODULE,
136 .name = "aten",
137 .max_mode = 2,
138 .epp_first = 2,
139 .default_delay = 1,
140 .max_units = 1,
141 .write_regr = aten_write_regr,
142 .read_regr = aten_read_regr,
143 .write_block = aten_write_block,
144 .read_block = aten_read_block,
145 .connect = aten_connect,
146 .disconnect = aten_disconnect,
147 .log_adapter = aten_log_adapter,
148};
149
150static int __init aten_init(void)
151{
152 return paride_register(&aten);
153}
154
155static void __exit aten_exit(void)
156{
157 paride_unregister( &aten );
158}
159
160MODULE_LICENSE("GPL");
161module_init(aten_init)
162module_exit(aten_exit)
163
