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/delay.h>
24 #include <linux/kernel.h>
25 #include <linux/types.h>
26 #include <linux/wait.h>
27 #include <asm/io.h>
28
29 #include "paride.h"
30
31 #define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
32
33 #define w7(byte) {out_p(7,byte);}
34 #define r7() (in_p(7) & 0xff)
35
36 /* cont = 0 - access the IDE register file
37 cont = 1 - access the IDE command set
38
39 */
40
fit3_write_regr(PIA * pi,int cont,int regr,int val)41 static void fit3_write_regr( PIA *pi, int cont, int regr, int val)
42
43 { if (cont == 1) return;
44
45 switch (pi->mode) {
46
47 case 0:
48 case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc);
49 w0(val); w2(0xd);
50 w0(0); w2(0xc);
51 break;
52
53 case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
54 w4(val); w4(0);
55 w2(0xc);
56 break;
57
58 }
59 }
60
fit3_read_regr(PIA * pi,int cont,int regr)61 static int fit3_read_regr( PIA *pi, int cont, int regr )
62
63 { int a, b;
64
65 if (cont) {
66 if (regr != 6) return 0xff;
67 regr = 7;
68 }
69
70 switch (pi->mode) {
71
72 case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
73 w2(0xd); a = r1();
74 w2(0xf); b = r1();
75 w2(0xc);
76 return j44(a,b);
77
78 case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
79 w2(0xec); w2(0xee); w2(0xef); a = r0();
80 w2(0xc);
81 return a;
82
83 case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
84 w2(0xec);
85 a = r4(); b = r4();
86 w2(0xc);
87 return a;
88
89 }
90 return -1;
91
92 }
93
fit3_read_block(PIA * pi,char * buf,int count)94 static void fit3_read_block( PIA *pi, char * buf, int count )
95
96 { int k, a, b, c, d;
97
98 switch (pi->mode) {
99
100 case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
101 for (k=0;k<count/2;k++) {
102 w2(0xd); a = r1();
103 w2(0xf); b = r1();
104 w2(0xc); c = r1();
105 w2(0xe); d = r1();
106 buf[2*k ] = j44(a,b);
107 buf[2*k+1] = j44(c,d);
108 }
109 w2(0xc);
110 break;
111
112 case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
113 w2(0xec); w2(0xee);
114 for (k=0;k<count/2;k++) {
115 w2(0xef); a = r0();
116 w2(0xee); b = r0();
117 buf[2*k ] = a;
118 buf[2*k+1] = b;
119 }
120 w2(0xec);
121 w2(0xc);
122 break;
123
124 case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
125 w2(0xec);
126 for (k=0;k<count;k++) buf[k] = r4();
127 w2(0xc);
128 break;
129
130 }
131 }
132
fit3_write_block(PIA * pi,char * buf,int count)133 static void fit3_write_block( PIA *pi, char * buf, int count )
134
135 { int k;
136
137 switch (pi->mode) {
138
139 case 0:
140 case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
141 for (k=0;k<count/2;k++) {
142 w0(buf[2*k ]); w2(0xd);
143 w0(buf[2*k+1]); w2(0xc);
144 }
145 break;
146
147 case 2: w2(0xc); w0(0); w2(0x8); w2(0xc);
148 for (k=0;k<count;k++) w4(buf[k]);
149 w2(0xc);
150 break;
151 }
152 }
153
fit3_connect(PIA * pi)154 static void fit3_connect ( PIA *pi )
155
156 { pi->saved_r0 = r0();
157 pi->saved_r2 = r2();
158 w2(0xc); w0(0); w2(0xa);
159 if (pi->mode == 2) {
160 w2(0xc); w0(0x9); w2(0x8); w2(0xc);
161 }
162 }
163
fit3_disconnect(PIA * pi)164 static void fit3_disconnect ( PIA *pi )
165
166 { w2(0xc); w0(0xa); w2(0x8); w2(0xc);
167 w0(pi->saved_r0);
168 w2(pi->saved_r2);
169 }
170
fit3_log_adapter(PIA * pi,char * scratch,int verbose)171 static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
172
173 { char *mode_string[3] = {"4-bit","8-bit","EPP"};
174
175 printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
176 "mode %d (%s), delay %d\n",
177 pi->device,FIT3_VERSION,pi->port,
178 pi->mode,mode_string[pi->mode],pi->delay);
179
180 }
181
fit3_init_proto(PIA * pi)182 static void fit3_init_proto(PIA *pi)
183
184 { MOD_INC_USE_COUNT;
185 }
186
fit3_release_proto(PIA * pi)187 static void fit3_release_proto(PIA *pi)
188
189 { MOD_DEC_USE_COUNT;
190 }
191
192 struct pi_protocol fit3 = {"fit3",0,3,2,1,1,
193 fit3_write_regr,
194 fit3_read_regr,
195 fit3_write_block,
196 fit3_read_block,
197 fit3_connect,
198 fit3_disconnect,
199 0,
200 0,
201 0,
202 fit3_log_adapter,
203 fit3_init_proto,
204 fit3_release_proto
205 };
206
207
208 #ifdef MODULE
209
init_module(void)210 int init_module(void)
211
212 { return pi_register( &fit3 ) - 1;
213 }
214
cleanup_module(void)215 void cleanup_module(void)
216
217 { pi_unregister( &fit3 );
218 }
219
220 #endif
221
222 /* end of fit3.c */
223 MODULE_LICENSE("GPL");
224