Home Home > GIT Browse > stable-xen
summaryrefslogtreecommitdiff
blob: 95ba256921f20c128a4a676c4ad405bfc1cdc1aa (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
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* 
        on26.c    (c) 1997-8  Grant R. Guenther <grant@torque.net>
                              Under the terms of the GNU General Public License.

        on26.c is a low-level protocol driver for the 
        OnSpec 90c26 parallel to IDE adapter chip.

*/

/* Changes:

        1.01    GRG 1998.05.06 init_proto, release_proto
	1.02    GRG 1998.09.23 updates for the -E rev chip
	1.03    GRG 1998.12.14 fix for slave drives
	1.04    GRG 1998.12.20 yet another bug fix

*/

#define ON26_VERSION      "1.04"

#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"

/* mode codes:  0  nybble reads, 8-bit writes
                1  8-bit reads and writes
                2  8-bit EPP mode
		3  EPP-16
		4  EPP-32
*/

#define j44(a,b)  (((a>>4)&0x0f)|(b&0xf0))

#define P1	w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
#define P2	w2(5);w2(7);w2(5);w2(4);

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

static int on26_read_regr( PIA *pi, int cont, int regr )

{       int     a, b, r;

	r = (regr<<2) + 1 + cont;

        switch (pi->mode)  {

        case 0: w0(1); P1; w0(r); P2; w0(0); P1; 
		w2(6); a = r1(); w2(4);
		w2(6); b = r1(); w2(4);
		w2(6); w2(4); w2(6); w2(4);
                return j44(a,b);

        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
		w2(0x26); a = r0(); w2(4); w2(0x26); w2(4);
                return a;

	case 2:
	case 3:
        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
		w3(0); w3(0); w2(0x24); a = r4(); w2(4);
		w2(0x24); (void)r4(); w2(4);
                return a;

        }
        return -1;
}       

static void on26_write_regr( PIA *pi, int cont, int regr, int val )

{       int  r;

        r = (regr<<2) + 1 + cont;

        switch (pi->mode)  {

        case 0:
        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
		w0(val); P2; w0(val); P2;
		break;

	case 2:
	case 3:
        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
		w3(0); w3(0); 
		w2(5); w4(val); w2(4);
		w2(5); w4(val); w2(4);
                break;
        }
}

#define  CCP(x)  w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);\
		 w0(0x87);w0(0x78);w0(x);w2(4);w2(5);w2(4);w0(0xff);

static void on26_connect ( PIA *pi )

{       int	x;

	pi->saved_r0 = r0();
        pi->saved_r2 = r2();

        CCP(0x20);
	x = 8; if (pi->mode) x = 9;

	w0(2); P1; w0(8); P2;
	w0(2); P1; w0(x); P2;
}

static void on26_disconnect ( PIA *pi )

{       if (pi->mode >= 2) { w3(4); w3(4); w3(4); w3(4); }
	              else { w0(4); P1; w0(4); P1; }
	CCP(0x30);
        w0(pi->saved_r0);
        w2(pi->saved_r2);
} 

#define	RESET_WAIT  200

static int on26_test_port( PIA *pi)  /* hard reset */

{       int     i, m, d, x=0, y=0;

        pi->saved_r0 = r0();
        pi->saved_r2 = r2();

        d = pi->delay;
        m = pi->mode;
        pi->delay = 5;
        pi->mode = 0;

        w2(0xc);

        CCP(0x30); CCP(0); 

        w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);
        i = ((r1() & 0xf0) << 4); w0(0x87);
        i |= (r1() & 0xf0); w0(0x78);
        w0(0x20);w2(4);w2(5);
        i |= ((r1() & 0xf0) >> 4);
        w2(4);w0(0xff);

        if (i == 0xb5f) {

            w0(2); P1; w0(0);   P2;
            w0(3); P1; w0(0);   P2;
            w0(2); P1; w0(8);   P2; udelay(100);
            w0(2); P1; w0(0xa); P2; udelay(100);
            w0(2); P1; w0(8);   P2; udelay(1000);
            
            on26_write_regr(pi,0,6,0xa0);

            for (i=0;i<RESET_WAIT;i++) {
                on26_write_regr(pi,0,6,0xa0);
                x = on26_read_regr(pi,0,7);
                on26_write_regr(pi,0,6,0xb0);
                y = on26_read_regr(pi,0,7);
                if (!((x&0x80)||(y&0x80))) break;
                mdelay(100);
            }

	    if (i == RESET_WAIT) 
		printk("on26: Device reset failed (%x,%x)\n",x,y);

            w0(4); P1; w0(4); P1;
        }

        CCP(0x30);

        pi->delay = d;
        pi->mode = m;
        w0(pi->saved_r0);
        w2(pi->saved_r2);

        return 5;
}


static void on26_read_block( PIA *pi, char * buf, int count )

{       int     k, a, b;

        switch (pi->mode) {

        case 0: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x18); P2; w0(0); P1;
		udelay(10);
		for (k=0;k<count;k++) {
                        w2(6); a = r1();
                        w2(4); b = r1();
                        buf[k] = j44(a,b);
                }
		w0(2); P1; w0(8); P2; 
                break;

        case 1: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x19); P2; w0(0); P1;
		udelay(10);
                for (k=0;k<count/2;k++) {
                        w2(0x26); buf[2*k] = r0();  
			w2(0x24); buf[2*k+1] = r0();
                }
                w0(2); P1; w0(9); P2;
                break;

        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
		w3(0); w3(0); w2(0x24);
		udelay(10);
                for (k=0;k<count;k++) buf[k] = r4();
                w2(4);
                break;

        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
                w3(0); w3(0); w2(0x24);
                udelay(10);
                for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
                w2(4);
                break;

        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
                w3(0); w3(0); w2(0x24);
                udelay(10);
                for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
                w2(4);
                break;

        }
}

static void on26_write_block( PIA *pi, char * buf, int count )

{       int	k;

        switch (pi->mode) {

        case 0: 
        case 1: w0(1); P1; w0(1); P2; 
		w0(2); P1; w0(0x18+pi->mode); P2; w0(0); P1;
		udelay(10);
		for (k=0;k<count/2;k++) {
                        w2(5); w0(buf[2*k]); 
			w2(7); w0(buf[2*k+1]);
                }
                w2(5); w2(4);
		w0(2); P1; w0(8+pi->mode); P2;
                break;

        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
		w3(0); w3(0); w2(0xc5);
		udelay(10);
                for (k=0;k<count;k++) w4(buf[k]);
		w2(0xc4);
                break;

        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
                w3(0); w3(0); w2(0xc5);
                udelay(10);
                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
                w2(0xc4);
                break;

        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
                w3(0); w3(0); w2(0xc5);
                udelay(10);
                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
                w2(0xc4);
                break;

        }

}

static void on26_log_adapter( PIA *pi, char * scratch, int verbose )

{       char    *mode_string[5] = {"4-bit","8-bit","EPP-8",
				   "EPP-16","EPP-32"};

        printk("%s: on26 %s, OnSpec 90c26 at 0x%x, ",
                pi->device,ON26_VERSION,pi->port);
        printk("mode %d (%s), delay %d\n",pi->mode,
		mode_string[pi->mode],pi->delay);

}

static struct pi_protocol on26 = {
	.owner		= THIS_MODULE,
	.name		= "on26",
	.max_mode	= 5,
	.epp_first	= 2,
	.default_delay	= 1,
	.max_units	= 1,
	.write_regr	= on26_write_regr,
	.read_regr	= on26_read_regr,
	.write_block	= on26_write_block,
	.read_block	= on26_read_block,
	.connect	= on26_connect,
	.disconnect	= on26_disconnect,
	.test_port	= on26_test_port,
	.log_adapter	= on26_log_adapter,
};

static int __init on26_init(void)
{
	return paride_register(&on26);
}

static void __exit on26_exit(void)
{
	paride_unregister(&on26);
}

MODULE_LICENSE("GPL");
module_init(on26_init)
module_exit(on26_exit)