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15#define ON20_VERSION "1.01"
16
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/delay.h>
20#include <linux/kernel.h>
21#include <linux/types.h>
22#include <linux/wait.h>
23#include <asm/io.h>
24
25#include "paride.h"
26
27#define op(f) w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
28#define vl(v) w2(4);w0(v);w2(5);w2(7);w2(5);w2(4);
29
30#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
31
32
33
34
35
36static int on20_read_regr( PIA *pi, int cont, int regr )
37
38{ int h,l, r ;
39
40 r = (regr<<2) + 1 + cont;
41
42 op(1); vl(r); op(0);
43
44 switch (pi->mode) {
45
46 case 0: w2(4); w2(6); l = r1();
47 w2(4); w2(6); h = r1();
48 w2(4); w2(6); w2(4); w2(6); w2(4);
49 return j44(l,h);
50
51 case 1: w2(4); w2(0x26); r = r0();
52 w2(4); w2(0x26); w2(4);
53 return r;
54
55 }
56 return -1;
57}
58
59static void on20_write_regr( PIA *pi, int cont, int regr, int val )
60
61{ int r;
62
63 r = (regr<<2) + 1 + cont;
64
65 op(1); vl(r);
66 op(0); vl(val);
67 op(0); vl(val);
68}
69
70static void on20_connect ( PIA *pi)
71
72{ pi->saved_r0 = r0();
73 pi->saved_r2 = r2();
74
75 w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4);
76 if (pi->mode) { op(2); vl(8); op(2); vl(9); }
77 else { op(2); vl(0); op(2); vl(8); }
78}
79
80static void on20_disconnect ( PIA *pi )
81
82{ w2(4);w0(7);w2(4);w2(0xc);w2(4);
83 w0(pi->saved_r0);
84 w2(pi->saved_r2);
85}
86
87static void on20_read_block( PIA *pi, char * buf, int count )
88
89{ int k, l, h;
90
91 op(1); vl(1); op(0);
92
93 for (k=0;k<count;k++)
94 if (pi->mode) {
95 w2(4); w2(0x26); buf[k] = r0();
96 } else {
97 w2(6); l = r1(); w2(4);
98 w2(6); h = r1(); w2(4);
99 buf[k] = j44(l,h);
100 }
101 w2(4);
102}
103
104static void on20_write_block( PIA *pi, char * buf, int count )
105
106{ int k;
107
108 op(1); vl(1); op(0);
109
110 for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); }
111 w2(4);
112}
113
114static void on20_log_adapter( PIA *pi, char * scratch, int verbose )
115
116{ char *mode_string[2] = {"4-bit","8-bit"};
117
118 printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ",
119 pi->device,ON20_VERSION,pi->port);
120 printk("mode %d (%s), delay %d\n",pi->mode,
121 mode_string[pi->mode],pi->delay);
122
123}
124
125static struct pi_protocol on20 = {
126 .owner = THIS_MODULE,
127 .name = "on20",
128 .max_mode = 2,
129 .epp_first = 2,
130 .default_delay = 1,
131 .max_units = 1,
132 .write_regr = on20_write_regr,
133 .read_regr = on20_read_regr,
134 .write_block = on20_write_block,
135 .read_block = on20_read_block,
136 .connect = on20_connect,
137 .disconnect = on20_disconnect,
138 .log_adapter = on20_log_adapter,
139};
140
141static int __init on20_init(void)
142{
143 return paride_register(&on20);
144}
145
146static void __exit on20_exit(void)
147{
148 paride_unregister(&on20);
149}
150
151MODULE_LICENSE("GPL");
152module_init(on20_init)
153module_exit(on20_exit)
154
