summaryrefslogtreecommitdiff
path: root/drivers/block/paride/kbic.c
blob: d983bcea76fe6d8978d17ae04d16bcd7069a2e4e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/*
        kbic.c    (c) 1997-8  Grant R. Guenther <grant@torque.net>
                              Under the terms of the GNU General Public License.

        This is a low-level driver for the KBIC-951A and KBIC-971A
        parallel to IDE adapter chips from KingByte Information Systems.

	The chips are almost identical, however, the wakeup code 
	required for the 971A interferes with the correct operation of
        the 951A, so this driver registers itself twice, once for
	each chip.

*/

/* Changes:

        1.01    GRG 1998.05.06 init_proto, release_proto

*/

#define KBIC_VERSION      "1.01"

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <asm/io.h>

#include "paride.h"

#define r12w()			(delay_p,inw(pi->port+1)&0xffff) 

#define j44(a,b)                ((((a>>4)&0x0f)|(b&0xf0))^0x88)
#define j53(w)                  (((w>>3)&0x1f)|((w>>4)&0xe0))


/* cont = 0 - access the IDE register file 
   cont = 1 - access the IDE command set 
*/

static int  cont_map[2] = { 0x80, 0x40 };

static int kbic_read_regr( PIA *pi, int cont, int regr )

{       int     a, b, s;

        s = cont_map[cont];

	switch (pi->mode) {

	case 0: w0(regr|0x18|s); w2(4); w2(6); w2(4); w2(1); w0(8);
	        a = r1(); w0(0x28); b = r1(); w2(4);
		return j44(a,b);

	case 1: w0(regr|0x38|s); w2(4); w2(6); w2(4); w2(5); w0(8);
		a = r12w(); w2(4);
		return j53(a);

	case 2: w0(regr|0x08|s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1);
		a = r0(); w2(4);
       		return a;

	case 3:
	case 4:
	case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
		a = r4(); b = r4(); w2(4); w2(0); w2(4);
		return a;

	}
	return -1;
}       

static void  kbic_write_regr( PIA *pi, int cont, int regr, int val)

{       int  s;

        s = cont_map[cont];

        switch (pi->mode) {

	case 0: 
        case 1:
	case 2:	w0(regr|0x10|s); w2(4); w2(6); w2(4); 
		w0(val); w2(5); w2(4);
		break;

	case 3:
	case 4:
	case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
		w4(val); w4(val);
		w2(4); w2(0); w2(4);
                break;

	}
}

static void k951_connect ( PIA *pi  )

{ 	pi->saved_r0 = r0();
        pi->saved_r2 = r2();
        w2(4); 
}

static void k951_disconnect ( PIA *pi )

{      	w0(pi->saved_r0);
        w2(pi->saved_r2);
}

#define	CCP(x)	w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\
		w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff);

static void k971_connect ( PIA *pi  )

{ 	pi->saved_r0 = r0();
        pi->saved_r2 = r2();
	CCP(0x20);
        w2(4); 
}

static void k971_disconnect ( PIA *pi )

{       CCP(0x30);
	w0(pi->saved_r0);
        w2(pi->saved_r2);
}

/* counts must be congruent to 0 MOD 4, but all known applications
   have this property.
*/

static void kbic_read_block( PIA *pi, char * buf, int count )

{       int     k, a, b;

        switch (pi->mode) {

        case 0: w0(0x98); w2(4); w2(6); w2(4);
                for (k=0;k<count/2;k++) {
			w2(1); w0(8);    a = r1();
			       w0(0x28); b = r1();
			buf[2*k]   = j44(a,b);
			w2(5);           b = r1();
			       w0(8);    a = r1();
			buf[2*k+1] = j44(a,b);
			w2(4);
                } 
                break;

        case 1: w0(0xb8); w2(4); w2(6); w2(4); 
                for (k=0;k<count/4;k++) {
                        w0(0xb8); 
			w2(4); w2(5); 
                        w0(8);    buf[4*k]   = j53(r12w());
			w0(0xb8); buf[4*k+1] = j53(r12w());
			w2(4); w2(5);
			          buf[4*k+3] = j53(r12w());
			w0(8);    buf[4*k+2] = j53(r12w());
                }
                w2(4);
                break;

        case 2: w0(0x88); w2(4); w2(6); w2(4);
                for (k=0;k<count/2;k++) {
                        w2(0xa0); w2(0xa1); buf[2*k] = r0();
                        w2(0xa5); buf[2*k+1] = r0();
                }
                w2(4);
                break;

        case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
                for (k=0;k<count;k++) buf[k] = r4();
                w2(4); w2(0); w2(4);
                break;

	case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
                for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
                w2(4); w2(0); w2(4);
                break;

        case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
                for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
                w2(4); w2(0); w2(4);
                break;


        }
}

static void kbic_write_block( PIA *pi, char * buf, int count )

{       int     k;

        switch (pi->mode) {

        case 0:
        case 1:
        case 2: w0(0x90); w2(4); w2(6); w2(4); 
		for(k=0;k<count/2;k++) {
			w0(buf[2*k+1]); w2(0); w2(4); 
			w0(buf[2*k]);   w2(5); w2(4); 
		}
		break;

        case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
		for(k=0;k<count/2;k++) {
			w4(buf[2*k+1]); 
                        w4(buf[2*k]);
                }
		w2(4); w2(0); w2(4);
		break;

	case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
                for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
                w2(4); w2(0); w2(4);
                break;

        case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
                for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
                w2(4); w2(0); w2(4);
                break;

        }

}

static void kbic_log_adapter( PIA *pi, char * scratch, 
			      int verbose, char * chip )

{       char    *mode_string[6] = {"4-bit","5/3","8-bit",
				   "EPP-8","EPP_16","EPP-32"};

        printk("%s: kbic %s, KingByte %s at 0x%x, ",
                pi->device,KBIC_VERSION,chip,pi->port);
        printk("mode %d (%s), delay %d\n",pi->mode,
		mode_string[pi->mode],pi->delay);

}

static void k951_log_adapter( PIA *pi, char * scratch, int verbose )

{	kbic_log_adapter(pi,scratch,verbose,"KBIC-951A");
}

static void k971_log_adapter( PIA *pi, char * scratch, int verbose )

{       kbic_log_adapter(pi,scratch,verbose,"KBIC-971A");
}

static struct pi_protocol k951 = {
	.owner		= THIS_MODULE,
	.name		= "k951",
	.max_mode	= 6,
	.epp_first	= 3,
	.default_delay	= 1,
	.max_units	= 1,
	.write_regr	= kbic_write_regr,
	.read_regr	= kbic_read_regr,
	.write_block	= kbic_write_block,
	.read_block	= kbic_read_block,
	.connect	= k951_connect,
	.disconnect	= k951_disconnect,
	.log_adapter	= k951_log_adapter,
};

static struct pi_protocol k971 = {
	.owner		= THIS_MODULE,
	.name		= "k971",
	.max_mode	= 6,
	.epp_first	= 3,
	.default_delay	= 1,
	.max_units	= 1,
	.write_regr	= kbic_write_regr,
	.read_regr	= kbic_read_regr,
	.write_block	= kbic_write_block,
	.read_block	= kbic_read_block,
	.connect	= k971_connect,
	.disconnect	= k971_disconnect,
	.log_adapter	= k971_log_adapter,
};

static int __init kbic_init(void)
{
	return (pi_register(&k951)||pi_register(&k971))-1;
}

static void __exit kbic_exit(void)
{
	pi_unregister(&k951);
	pi_unregister(&k971);
}

MODULE_LICENSE("GPL");
module_init(kbic_init)
module_exit(kbic_exit)