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1da177e4 LT |
1 | /* |
2 | on20.c (c) 1996-8 Grant R. Guenther <grant@torque.net> | |
3 | Under the terms of the GNU General Public License. | |
4 | ||
5 | on20.c is a low-level protocol driver for the | |
6 | Onspec 90c20 parallel to IDE adapter. | |
7 | */ | |
8 | ||
9 | /* Changes: | |
10 | ||
11 | 1.01 GRG 1998.05.06 init_proto, release_proto | |
12 | ||
13 | */ | |
14 | ||
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 | /* cont = 0 - access the IDE register file | |
33 | cont = 1 - access the IDE command set | |
34 | */ | |
35 | ||
36 | static 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 | ||
59 | static 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 | ||
70 | static 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 | ||
80 | static 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 | ||
87 | static 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 | ||
104 | static 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 | ||
114 | static 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 | ||
125 | static 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 | ||
141 | static int __init on20_init(void) | |
142 | { | |
b4178ab5 | 143 | return paride_register(&on20); |
1da177e4 LT |
144 | } |
145 | ||
146 | static void __exit on20_exit(void) | |
147 | { | |
f4330002 | 148 | paride_unregister(&on20); |
1da177e4 LT |
149 | } |
150 | ||
151 | MODULE_LICENSE("GPL"); | |
152 | module_init(on20_init) | |
153 | module_exit(on20_exit) |