1 /*
2 fit3.c (c) 1998 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
4
5 fit3.c is a low-level protocol driver for newer models
6 of the Fidelity International Technology parallel port adapter.
7 This adapter is used in their TransDisk 3000 portable
8 hard-drives, as well as CD-ROM, PD-CD and other devices.
9
10 The TD-2000 and certain older devices use a different protocol.
11 Try the fit2 protocol module with them.
12
13 NB: The FIT adapters do not appear to support the control
14 registers. So, we map ALT_STATUS to STATUS and NO-OP writes
15 to the device control register - this means that IDE reset
16 will not work on these devices.
17
18 */
19
20 #define FIT3_VERSION "1.0"
21
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/wait.h>
28 #include <asm/io.h>
29
30 #include "paride.h"
31
32 #define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
33
34 #define w7(byte) {out_p(7,byte);}
35 #define r7() (in_p(7) & 0xff)
36
37 /* cont = 0 - access the IDE register file
38 cont = 1 - access the IDE command set
39
40 */
41
fit3_write_regr(PIA * pi,int cont,int regr,int val)42 static void fit3_write_regr( PIA *pi, int cont, int regr, int val)
43
44 { if (cont == 1) return;
45
46 switch (pi->mode) {
47
48 case 0:
49 case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc);
50 w0(val); w2(0xd);
51 w0(0); w2(0xc);
52 break;
53
54 case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
55 w4(val); w4(0);
56 w2(0xc);
57 break;
58
59 }
60 }
61
fit3_read_regr(PIA * pi,int cont,int regr)62 static int fit3_read_regr( PIA *pi, int cont, int regr )
63
64 { int a, b;
65
66 if (cont) {
67 if (regr != 6) return 0xff;
68 regr = 7;
69 }
70
71 switch (pi->mode) {
72
73 case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
74 w2(0xd); a = r1();
75 w2(0xf); b = r1();
76 w2(0xc);
77 return j44(a,b);
78
79 case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
80 w2(0xec); w2(0xee); w2(0xef); a = r0();
81 w2(0xc);
82 return a;
83
84 case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
85 w2(0xec);
86 a = r4(); b = r4();
87 w2(0xc);
88 return a;
89
90 }
91 return -1;
92
93 }
94
fit3_read_block(PIA * pi,char * buf,int count)95 static void fit3_read_block( PIA *pi, char * buf, int count )
96
97 { int k, a, b, c, d;
98
99 switch (pi->mode) {
100
101 case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
102 for (k=0;k<count/2;k++) {
103 w2(0xd); a = r1();
104 w2(0xf); b = r1();
105 w2(0xc); c = r1();
106 w2(0xe); d = r1();
107 buf[2*k ] = j44(a,b);
108 buf[2*k+1] = j44(c,d);
109 }
110 w2(0xc);
111 break;
112
113 case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
114 w2(0xec); w2(0xee);
115 for (k=0;k<count/2;k++) {
116 w2(0xef); a = r0();
117 w2(0xee); b = r0();
118 buf[2*k ] = a;
119 buf[2*k+1] = b;
120 }
121 w2(0xec);
122 w2(0xc);
123 break;
124
125 case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
126 w2(0xec);
127 for (k=0;k<count;k++) buf[k] = r4();
128 w2(0xc);
129 break;
130
131 }
132 }
133
fit3_write_block(PIA * pi,char * buf,int count)134 static void fit3_write_block( PIA *pi, char * buf, int count )
135
136 { int k;
137
138 switch (pi->mode) {
139
140 case 0:
141 case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
142 for (k=0;k<count/2;k++) {
143 w0(buf[2*k ]); w2(0xd);
144 w0(buf[2*k+1]); w2(0xc);
145 }
146 break;
147
148 case 2: w2(0xc); w0(0); w2(0x8); w2(0xc);
149 for (k=0;k<count;k++) w4(buf[k]);
150 w2(0xc);
151 break;
152 }
153 }
154
fit3_connect(PIA * pi)155 static void fit3_connect ( PIA *pi )
156
157 { pi->saved_r0 = r0();
158 pi->saved_r2 = r2();
159 w2(0xc); w0(0); w2(0xa);
160 if (pi->mode == 2) {
161 w2(0xc); w0(0x9); w2(0x8); w2(0xc);
162 }
163 }
164
fit3_disconnect(PIA * pi)165 static void fit3_disconnect ( PIA *pi )
166
167 { w2(0xc); w0(0xa); w2(0x8); w2(0xc);
168 w0(pi->saved_r0);
169 w2(pi->saved_r2);
170 }
171
fit3_log_adapter(PIA * pi,char * scratch,int verbose)172 static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
173
174 { char *mode_string[3] = {"4-bit","8-bit","EPP"};
175
176 printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
177 "mode %d (%s), delay %d\n",
178 pi->device,FIT3_VERSION,pi->port,
179 pi->mode,mode_string[pi->mode],pi->delay);
180
181 }
182
183 static struct pi_protocol fit3 = {
184 .owner = THIS_MODULE,
185 .name = "fit3",
186 .max_mode = 3,
187 .epp_first = 2,
188 .default_delay = 1,
189 .max_units = 1,
190 .write_regr = fit3_write_regr,
191 .read_regr = fit3_read_regr,
192 .write_block = fit3_write_block,
193 .read_block = fit3_read_block,
194 .connect = fit3_connect,
195 .disconnect = fit3_disconnect,
196 .log_adapter = fit3_log_adapter,
197 };
198
fit3_init(void)199 static int __init fit3_init(void)
200 {
201 return paride_register(&fit3);
202 }
203
fit3_exit(void)204 static void __exit fit3_exit(void)
205 {
206 paride_unregister(&fit3);
207 }
208
209 MODULE_LICENSE("GPL");
210 module_init(fit3_init)
211 module_exit(fit3_exit)
212