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
41static 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
61static 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
94static 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
133static 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
154static 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
164static 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
171static 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
182static void fit3_init_proto(PIA *pi)
183
184{       MOD_INC_USE_COUNT;
185}
186
187static void fit3_release_proto(PIA *pi)
188
189{       MOD_DEC_USE_COUNT;
190}
191
192struct 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
210int     init_module(void)
211
212{       return pi_register( &fit3 ) - 1;
213}
214
215void    cleanup_module(void)
216
217{       pi_unregister( &fit3 );
218}
219
220#endif
221
222/* end of fit3.c */
223MODULE_LICENSE("GPL");
224