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
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
|
/*-
* Copyright (c) 1998, 1999 Nicolas Souchu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#include <machine/stdarg.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/ppb_msq.h>
#include "ppbus_if.h"
/* msq index (see PPB_MAX_XFER)
* These are device modes
*/
#define COMPAT_MSQ 0x0
#define NIBBLE_MSQ 0x1
#define PS2_MSQ 0x2
#define EPP17_MSQ 0x3
#define EPP19_MSQ 0x4
#define ECP_MSQ 0x5
/*
* Device mode to submsq conversion
*/
static struct ppb_xfer *
mode2xfer(device_t bus, struct ppb_device *ppbdev, int opcode)
{
int index, epp;
struct ppb_xfer *table;
switch (opcode) {
case MS_OP_GET:
table = ppbdev->get_xfer;
break;
case MS_OP_PUT:
table = ppbdev->put_xfer;
break;
default:
panic("%s: unknown opcode (%d)", __FUNCTION__, opcode);
}
/* retrieve the device operating mode */
switch (ppb_get_mode(bus)) {
case PPB_COMPATIBLE:
index = COMPAT_MSQ;
break;
case PPB_NIBBLE:
index = NIBBLE_MSQ;
break;
case PPB_PS2:
index = PS2_MSQ;
break;
case PPB_EPP:
switch ((epp = ppb_get_epp_protocol(bus))) {
case EPP_1_7:
index = EPP17_MSQ;
break;
case EPP_1_9:
index = EPP19_MSQ;
break;
default:
panic("%s: unknown EPP protocol (0x%x)!", __FUNCTION__,
epp);
}
break;
case PPB_ECP:
index = ECP_MSQ;
break;
default:
panic("%s: unknown mode (%d)", __FUNCTION__, ppbdev->mode);
}
return (&table[index]);
}
/*
* ppb_MS_init()
*
* Initialize device dependent submicrosequence of the current mode
*
*/
int
ppb_MS_init(device_t bus, device_t dev, struct ppb_microseq *loop, int opcode)
{
struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
struct ppb_xfer *xfer = mode2xfer(bus, ppbdev, opcode);
xfer->loop = loop;
return (0);
}
/*
* ppb_MS_exec()
*
* Execute any microsequence opcode - expensive
*
*/
int
ppb_MS_exec(device_t bus, device_t dev, int opcode, union ppb_insarg param1,
union ppb_insarg param2, union ppb_insarg param3, int *ret)
{
struct ppb_microseq msq[] = {
{ MS_UNKNOWN, { { MS_UNKNOWN }, { MS_UNKNOWN }, { MS_UNKNOWN } } },
MS_RET(0)
};
/* initialize the corresponding microseq */
msq[0].opcode = opcode;
msq[0].arg[0] = param1;
msq[0].arg[1] = param2;
msq[0].arg[2] = param3;
/* execute the microseq */
return (ppb_MS_microseq(bus, dev, msq, ret));
}
/*
* ppb_MS_loop()
*
* Execute a microseq loop
*
*/
int
ppb_MS_loop(device_t bus, device_t dev, struct ppb_microseq *prolog,
struct ppb_microseq *body, struct ppb_microseq *epilog,
int iter, int *ret)
{
struct ppb_microseq loop_microseq[] = {
MS_CALL(0), /* execute prolog */
MS_SET(MS_UNKNOWN), /* set size of transfer */
/* loop: */
MS_CALL(0), /* execute body */
MS_DBRA(-1 /* loop: */),
MS_CALL(0), /* execute epilog */
MS_RET(0)
};
/* initialize the structure */
loop_microseq[0].arg[0].p = (void *)prolog;
loop_microseq[1].arg[0].i = iter;
loop_microseq[2].arg[0].p = (void *)body;
loop_microseq[4].arg[0].p = (void *)epilog;
/* execute the loop */
return (ppb_MS_microseq(bus, dev, loop_microseq, ret));
}
/*
* ppb_MS_init_msq()
*
* Initialize a microsequence - see macros in ppb_msq.h
*
*/
int
ppb_MS_init_msq(struct ppb_microseq *msq, int nbparam, ...)
{
int i;
int param, ins, arg, type;
va_list p_list;
va_start(p_list, nbparam);
for (i=0; i<nbparam; i++) {
/* retrieve the parameter descriptor */
param = va_arg(p_list, int);
ins = MS_INS(param);
arg = MS_ARG(param);
type = MS_TYP(param);
/* check the instruction position */
if (arg >= PPB_MS_MAXARGS)
panic("%s: parameter out of range (0x%x)!",
__FUNCTION__, param);
#if 0
printf("%s: param = %d, ins = %d, arg = %d, type = %d\n",
__FUNCTION__, param, ins, arg, type);
#endif
/* properly cast the parameter */
switch (type) {
case MS_TYP_INT:
msq[ins].arg[arg].i = va_arg(p_list, int);
break;
case MS_TYP_CHA:
msq[ins].arg[arg].i = (int)va_arg(p_list, int);
break;
case MS_TYP_PTR:
msq[ins].arg[arg].p = va_arg(p_list, void *);
break;
case MS_TYP_FUN:
msq[ins].arg[arg].f = va_arg(p_list, void *);
break;
default:
panic("%s: unknown parameter (0x%x)!", __FUNCTION__,
param);
}
}
return (0);
}
/*
* ppb_MS_microseq()
*
* Interprete a microsequence. Some microinstructions are executed at adapter
* level to avoid function call overhead between ppbus and the adapter
*/
int
ppb_MS_microseq(device_t bus, device_t dev, struct ppb_microseq *msq, int *ret)
{
struct ppb_data *ppb = (struct ppb_data *)device_get_softc(bus);
struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
struct ppb_microseq *mi; /* current microinstruction */
int error;
struct ppb_xfer *xfer;
/* microsequence executed to initialize the transfer */
struct ppb_microseq initxfer[] = {
MS_PTR(MS_UNKNOWN), /* set ptr to buffer */
MS_SET(MS_UNKNOWN), /* set transfer size */
MS_RET(0)
};
if (ppb->ppb_owner != dev)
return (EACCES);
#define INCR_PC (mi ++)
mi = msq;
for (;;) {
switch (mi->opcode) {
case MS_OP_PUT:
case MS_OP_GET:
/* attempt to choose the best mode for the device */
xfer = mode2xfer(bus, ppbdev, mi->opcode);
/* figure out if we should use ieee1284 code */
if (!xfer->loop) {
if (mi->opcode == MS_OP_PUT) {
if ((error = PPBUS_WRITE(
device_get_parent(bus),
(char *)mi->arg[0].p,
mi->arg[1].i, 0)))
goto error;
INCR_PC;
goto next;
} else
panic("%s: IEEE1284 read not supported", __FUNCTION__);
}
/* XXX should use ppb_MS_init_msq() */
initxfer[0].arg[0].p = mi->arg[0].p;
initxfer[1].arg[0].i = mi->arg[1].i;
/* initialize transfer */
ppb_MS_microseq(bus, dev, initxfer, &error);
if (error)
goto error;
/* the xfer microsequence should not contain any
* MS_OP_PUT or MS_OP_GET!
*/
ppb_MS_microseq(bus, dev, xfer->loop, &error);
if (error)
goto error;
INCR_PC;
break;
case MS_OP_RET:
if (ret)
*ret = mi->arg[0].i; /* return code */
return (0);
break;
default:
/* executing microinstructions at ppc level is
* faster. This is the default if the microinstr
* is unknown here
*/
if ((error = PPBUS_EXEC_MICROSEQ(
device_get_parent(bus), &mi)))
goto error;
break;
}
next:
}
error:
return (error);
}
|